windows-server-2003/shell/comctl32/v6/listview.c

#include "ctlspriv.h"
#include "listview.h"
#include "image.h"
#include <mlang.h>
#include <inetreg.h>
#include "uxthemep.h"

#define __IOleControl_INTERFACE_DEFINED__       // There is a conflict with the IOleControl's def of CONTROLINFO
#include "shlobj.h"

#ifdef FULL_DEBUG
#define LISTVIEW_VFX_DEFAULT TRUE
#else
#define LISTVIEW_VFX_DEFAULT FALSE
#endif

int  LV_GetNewColWidth(LV* plv, int iFirst, int iLast);
void ListView_RecalcTileSize(LV* plv);
int  ListView_ComputeCXItemSize(LV* plv);

#define IE_SETTINGS          TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced")
#define USE_DBL_CLICK_TIMER  TEXT("UseDoubleClickTimer")

int g_bUseDblClickTimer;

#define LVMP_WINDOWPOSCHANGED (WM_USER + 1)
HRESULT WINAPI UninitializeFlatSB(HWND hwnd);

// the insert mark is 6 pixels wide
#define INSERTMARKSIZE      6
#define GROUPHEADER_PADDING 6
#define GRADIENT_WIDTH      300

#define COLORISLIGHT(clr) ((5*GetGValue((clr)) + 2*GetRValue((clr)) + GetBValue((clr))) > 8*128)

void ListView_HandleMouse(LV* plv, BOOL fDoubleClick, int x, int y, UINT keyFlags, BOOL bMouseWheel);

/// function table setup
const PFNLISTVIEW_DRAWITEM pfnListView_DrawItem[5] = 
{
    ListView_IDrawItem,
    ListView_RDrawItem,
    ListView_IDrawItem,
    ListView_LDrawItem,
    ListView_TDrawItem,
};

void ListView_HandleStateIconClick(LV* plv, int iItem);

DWORD ListView_IApproximateViewRect(LV* ,int, int, int);
DWORD ListView_RApproximateViewRect(LV* ,int, int, int);
DWORD ListView_LApproximateViewRect(LV* ,int, int, int);

const PFNLISTVIEW_APPROXIMATEVIEWRECT pfnListView_ApproximateViewRect[5] = 
{
    ListView_IApproximateViewRect,
    ListView_RApproximateViewRect,
    ListView_IApproximateViewRect,
    ListView_LApproximateViewRect,
    ListView_IApproximateViewRect,
};

const PFNLISTVIEW_UPDATESCROLLBARS pfnListView_UpdateScrollBars[5] = 
{
    ListView_IUpdateScrollBars,
    ListView_RUpdateScrollBars,
    ListView_IUpdateScrollBars,
    ListView_LUpdateScrollBars,
    ListView_IUpdateScrollBars,
};

const PFNLISTVIEW_ITEMHITTEST pfnListView_ItemHitTest[5] = 
{
    ListView_IItemHitTest,
    ListView_RItemHitTest,
    ListView_SItemHitTest,
    ListView_LItemHitTest,
    ListView_TItemHitTest,
};

const PFNLISTVIEW_ONSCROLL pfnListView_OnScroll[5] = 
{
    ListView_IOnScroll,
    ListView_ROnScroll,
    ListView_IOnScroll,
    ListView_LOnScroll,
    ListView_IOnScroll,
};

const PFNLISTVIEW_SCROLL2 pfnListView_Scroll2[5] = 
{
    ListView_IScroll2,
    ListView_RScroll2,
    ListView_IScroll2,
    ListView_LScroll2,
    ListView_IScroll2,
};

const PFNLISTVIEW_GETSCROLLUNITSPERLINE pfnListView_GetScrollUnitsPerLine[5] = 
{
    ListView_IGetScrollUnitsPerLine,
    ListView_RGetScrollUnitsPerLine,
    ListView_IGetScrollUnitsPerLine,
    ListView_LGetScrollUnitsPerLine,
    ListView_IGetScrollUnitsPerLine,
};

const PFNLISTVIEW_RECOMPUTELABELSIZE pfnListView_RecomputeLabelSize[5] = 
{
    ListView_IRecomputeLabelSize,
    ListView_IRecomputeLabelSize,
    ListView_IRecomputeLabelSize,
    ListView_IRecomputeLabelSize,
    ListView_TRecomputeLabelSize,
};

BOOL ListView_NULLRecomputeEx(LV* plv, HDPA hdpaSort, int iFrom, BOOL fForce)
{
    return FALSE;
}

const PFNLISTVIEW_RECOMPUTEEX pfnListView_RecomputeEx[5] = 
{
    ListView_IRecomputeEx,
    ListView_RRecomputeEx,
    ListView_IRecomputeEx,
    ListView_NULLRecomputeEx,
    ListView_IRecomputeEx,
};

#ifdef DEBUG_PAINT
void ListView_DebugDrawInvalidRegion(LV* plv, RECT* prc, HRGN hrgn)
{
    HDC hdc;
    HBRUSH hbrush;
    int bkMode;
    static int s_iclr;
    static COLORREF s_aclr[] =
    {
            RGB(255, 0, 0), RGB(0, 255, 0),
            RGB(255, 255, 0), RGB(0, 255, 255),
    };

    s_iclr = (s_iclr + 1) % ARRAYSIZE(s_aclr);
    hdc = GetDC(plv->ci.hwnd);
    hbrush = CreateHatchBrush(HS_DIAGCROSS, s_aclr[s_iclr]);
    bkMode = SetBkMode(hdc, TRANSPARENT);
    if (prc)
    {
        FillRect(hdc, prc, hbrush);
    }
    else if (hrgn)
    {
        FillRgn(hdc, hrgn, hbrush);
    }
    DeleteObject((HGDIOBJ)hbrush);
    SetBkMode(hdc, bkMode);
    ReleaseDC(plv->ci.hwnd, hdc);
    Sleep(120);
}

BOOL ListView_DebugDrawInvalidItem(LV* plv, int iItem)
{
    RECT rcLabel;
    RECT rcIcon;
    ListView_GetRects(plv, iItem, QUERY_DEFAULT,
        &rcIcon, &rcLabel, NULL, NULL);
    ListView_DebugDrawInvalidRegion(plv, &rcIcon, NULL);
    ListView_DebugDrawInvalidRegion(plv, &rcLabel, NULL);
    return TRUE;

}


void ListView_DebugDisplayClipRegion(LV* plv, RECT* prc, HRGN hrgn)
{
    HDC hdc = GetDC(plv->ci.hwnd);
    if (prc)
    {
        InvertRect(hdc, prc);
    }
    else if (hrgn)
    {
        InvertRgn(hdc, hrgn);
    }

    Sleep(120);

    if (prc)
    {
        InvertRect(hdc, prc);
    }
    else if (hrgn)
    {
        InvertRgn(hdc, hrgn);
    }

    ReleaseDC(plv->ci.hwnd, hdc);
}
#else
#define ListView_DebugDrawInvalidItem(plv, iItem) FALSE
#endif

// redefine to trace at most calls to ListView_SendChange
#define DM_LVSENDCHANGE 0


// penwin.h is messed up; define local stuff for now
#define HN_BEGINDIALOG        40    // Lens/EditText/garbage detection dialog is about
                                    // to come up on this hedit/bedit
#define HN_ENDDIALOG          41    // Lens/EditText/garbage detection dialog has
                                    // just been destroyed

//---------------------------------------------------------
// no way am I gonna make TWO function calls where I can do FOUR comparisons!
//
#define RECTS_IN_SIZE(sz, r2) (!RECTS_NOT_IN_SIZE(sz, r2))

#define RECTS_NOT_IN_SIZE(sz, r2) (\
   ((sz).cx <= (r2).left) ||\
   (0 >= (r2).right) ||\
   ((sz).cy <= (r2).top) ||\
   (0 >= (r2).bottom))

//---------------------------------------------------------


void ListView_OnUpdate(LV* plv, int i);
void ListView_OnDestroy(LV* plv);
BOOL ListView_ValidateScrollParams(LV* plv, int * dx, int *dy);
void ListView_ButtonSelect(LV* plv, int iItem, UINT keyFlags, BOOL bSelected);
void ListView_DeselectAll(LV* plv, int iDontDeselect);
void ListView_LRInvalidateBelow(LV* plv, int i, int fSmoothScroll);
void ListView_IInvalidateBelow(LV* plv, int i);
void ListView_InvalidateFoldedItem(LV* plv, int iItem, BOOL fSelectionOnly, UINT fRedraw);
void ListView_ReleaseBkImage(LV *plv);
void ListView_RecalcRegion(LV *plv, BOOL fForce, BOOL fRedraw);

BOOL g_fSlowMachine = -1;

BOOL ListView_Init(HINSTANCE hinst)
{
    WNDCLASS wc;

    wc.lpfnWndProc     = ListView_WndProc;
    wc.hCursor         = LoadCursor(NULL, IDC_ARROW);
    wc.hIcon           = NULL;
    wc.lpszMenuName    = NULL;
    wc.hInstance       = hinst;
    wc.lpszClassName   = c_szListViewClass;
    wc.hbrBackground   = (HBRUSH)(COLOR_WINDOW + 1); // NULL;
    wc.style           = CS_DBLCLKS | CS_GLOBALCLASS;
    wc.cbWndExtra      = sizeof(LV*);
    wc.cbClsExtra      = 0;

    return (RegisterClass(&wc) || (GetLastError() == ERROR_CLASS_ALREADY_EXISTS));
}

// Cancel tracking tooltips which are activated by item focus via keyboard
void ListView_CancelTipTrack(LV* plv)
{
    // Make sure in tracking mode
    if (plv->hwndToolTips)
    {
        // Cancel any pending timer
        KillTimer(plv->ci.hwnd, IDT_TRACKINGTIP);

        if (ListView_IsKbdTipTracking(plv))
        {
            TOOLINFO ti = {0};

            // Mark as tracking nothing
            plv->iTracking = LVKTT_NOTRACK;
     
            // Reset tooltip to non-tracking
            ti.cbSize = sizeof(TOOLINFO);
            ti.hwnd = plv->ci.hwnd;

            SendMessage(plv->hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti);

            SendMessage(plv->hwndToolTips, TTM_TRACKACTIVATE, FALSE, (LPARAM)&ti);

            // Switch tooltip window back to non-tracking (manual) mode
            ti.uFlags &= ~TTF_TRACK;
            SendMessage(plv->hwndToolTips, TTM_SETTOOLINFO, 0, (LPARAM)&ti);
        }
    }
}

BOOL ListView_GetRegIASetting(BOOL *pb)
{
    HKEY        hkey;
    BOOL        bRet = FALSE;
    BOOL        bValue = TRUE;

    if (RegOpenKeyEx(HKEY_CURRENT_USER, IE_SETTINGS, 0, KEY_READ, &hkey) == ERROR_SUCCESS)
    {
        DWORD dwType;
        DWORD dwValue;
        DWORD cbValue = sizeof(DWORD);

        if (RegQueryValueEx(hkey, (LPTSTR)USE_DBL_CLICK_TIMER, 0, &dwType, (LPBYTE)&dwValue, &cbValue) == ERROR_SUCCESS)
        {
            bValue = (BOOL)dwValue;
            bRet = TRUE;
        }
        RegCloseKey(hkey);
    }

    *pb = bValue;
    return bRet;
}


BOOL ListView_NotifyCacheHint(LV* plv, int iFrom, int iTo)
{
    NM_CACHEHINT nm;

    if (iFrom <= iTo)
    {
        nm.iFrom = iFrom;
        nm.iTo = iTo;
        return !(BOOL)CCSendNotify(&plv->ci, LVN_ODCACHEHINT, &nm.hdr);
    }
    return FALSE;
}

void ListView_LazyCreateObjects(LV *plv, int iMin, int iMax)
{
    for (; iMin < iMax; iMin++)
        NotifyWinEvent(EVENT_OBJECT_CREATE, plv->ci.hwnd, OBJID_CLIENT, 1 + iMin);
}

//
//  Owner-data causes MSAA lots of grief, because there is no way to tell
//  MSAA "I just created 25 million items".  You have to tell it one at a
//  time.  Instead of sending out 25 million "add item" notifications, we
//  just send them out as they scroll into view.
//
//  plv->iMSAAMin and plv->iMSAAMax are the range of items we most
//  recently told MSAA about.  MSAAMax is *exclusive*, just like RECTs.
//  It makes the math easier.
//
//  We use iMSAAMin and iMSAAMax to avoid sending blatantly redundant
//  notifications, which would other happen very frequently.
//
void ListView_LazyCreateWinEvents(LV *plv, int iFrom, int iTo)
{
    int iMin = iFrom;
    int iMax = iTo+1;           // Convert from [From,To] to [Min,Max)

    //
    //  If the incoming range is entirely contained within the existing
    //  range, then there is nothing to do.  This happens a lot.
    //
    if (iMin >= plv->iMSAAMin && iMax <= plv->iMSAAMax)
        return;

    //
    //  If the incoming range is adjacent to or overlaps the low end
    //  of the existing range...  (This happens when scrolling backwards.)
    //
    if (iMin <= plv->iMSAAMin && iMax >= plv->iMSAAMin)
    {
        // Notify the low end.
        ListView_LazyCreateObjects(plv, iMin, plv->iMSAAMin);

        // Extend the list of things we've notified.
        plv->iMSAAMin = iMin;

        // Remove it from the things left to be notified.
        iMin = plv->iMSAAMax;
    }

    //
    //  Now do the same thing to the top end.
    //  (This happens when scrolling forwards.)
    //
    if (iMax >= plv->iMSAAMax && iMin <= plv->iMSAAMax)
    {
        // Notify the top end.
        ListView_LazyCreateObjects(plv, plv->iMSAAMax, iMax);

        // Extend the list of things we've notified.
        plv->iMSAAMax = iMax;

        // Remove it from the things left to be notified.
        iMax = plv->iMSAAMin;
    }

    //
    //  If there are still things to be notified, then it means that the
    //  incoming range isn't contiguous with the previous range, so throw
    //  away the old range and just set it to the current range.
    //  (This happens when you grab the scrollbar and jump to a completely
    //  unrelated part of the listview.)
    //
    if (iMin < iMax)
    {
        plv->iMSAAMin = iMin;
        plv->iMSAAMax = iMax;
        ListView_LazyCreateObjects(plv, iMin, iMax);
    }

}

LRESULT ListView_RequestFindItem(LV* plv, CONST LV_FINDINFO* plvfi, int iStart)
{
    NM_FINDITEM nm;

    nm.lvfi = *plvfi;
    nm.iStart = iStart;
    return CCSendNotify(&plv->ci, LVN_ODFINDITEM, &nm.hdr);
}

BOOL ListView_SendChange(LV* plv, int i, int iSubItem, int code, UINT oldState, UINT newState,
                              UINT changed, LPARAM lParam)
{
    NM_LISTVIEW nm;

    nm.iItem = i;
    nm.iSubItem = iSubItem;
    nm.uNewState = newState;
    nm.uOldState = oldState;
    nm.uChanged = changed;
    nm.ptAction.x = 0;
    nm.ptAction.y = 0;
    nm.lParam = lParam;

    return !CCSendNotify(&plv->ci, code, &nm.hdr);
}

void ListView_SendODChangeAndInvalidate(LV* plv, int iFrom, int iTo, UINT oldState,
                                UINT newState)
{
    NM_ODSTATECHANGE nm;

    nm.iFrom = iFrom;
    nm.iTo = iTo;
    nm.uNewState = newState;
    nm.uOldState = oldState;

    CCSendNotify(&plv->ci, LVN_ODSTATECHANGED, &nm.hdr);

    // Tell accessibility, "Selection changed in a complex way"
    NotifyWinEvent(EVENT_OBJECT_SELECTIONWITHIN, plv->ci.hwnd, OBJID_CLIENT, CHILDID_SELF);

    // considerable speed increase less than 100 to do this method
    // while over 100, the other method works faster
    if ((iTo - iFrom) > 100)
    {
        InvalidateRect(plv->ci.hwnd, NULL, FALSE);
    }
    else
    {
        while (iFrom <= iTo)
        {
            ListView_InvalidateItem(plv, iFrom, TRUE, RDW_INVALIDATE);
            iFrom++;
        }
    }
}

//
//  This function autoarranges or snaps to grid based on the style and ExStyle
//
//  Note: AutoArrange overrides the snap-to-grid style.
//
void ListView_ArrangeOrSnapToGrid(LV *plv)
{
    if (plv->ci.style & LVS_AUTOARRANGE)
        ListView_OnArrange(plv, LVA_DEFAULT);
    else if (plv->exStyle & LVS_EX_SNAPTOGRID)
        ListView_OnArrange(plv, LVA_SNAPTOGRID);
}

BOOL ListView_Notify(LV* plv, int i, int iSubItem, int code)
{
    NM_LISTVIEW nm;
    nm.iItem = i;
    nm.iSubItem = iSubItem;
    nm.uNewState = nm.uOldState = 0;
    nm.uChanged = 0;
    nm.lParam = 0;
    
    if (!ListView_IsOwnerData(plv)) 
    {
        if (code == LVN_DELETEITEM) 
        {
            LISTITEM * pItem = ListView_GetItemPtr(plv, i);
            if (pItem) 
                nm.lParam = pItem->lParam;
        }
    }
    
    return (BOOL)CCSendNotify(&plv->ci, code, &nm.hdr);
}

BOOL ListView_GetEmptyText(LV* plv)
{
    BOOL fRet;

    if (plv->fNoEmptyText)
    {
        fRet = FALSE;
    }
    else if (plv->pszEmptyText)
    {
        fRet = TRUE;
    }
    else
    {
        TCHAR szText[80];
        NMLVDISPINFO nm = {0};

        // For each listview control, we will only send this notify
        // once if necessary.
        szText[0] = TEXT('\0');

        nm.item.mask       = LVIF_TEXT;
        nm.item.pszText    = szText;
        nm.item.cchTextMax = ARRAYSIZE(szText);

        fRet = (BOOL)CCSendNotify(&plv->ci, LVN_GETEMPTYTEXT, &nm.hdr);

        if (fRet)
        {
            // save the text so we don't notify again.
            Str_Set(&plv->pszEmptyText, szText);
        }
        else
        {
            // set a flag so we don't notify again.
            plv->fNoEmptyText = TRUE;
        }
    }

    return fRet;
}

void ListView_NotifyFocusEvent(LV *plv)
{
    if (plv->iFocus != -1 && IsWindowVisible(plv->ci.hwnd) && GetFocus() == plv->ci.hwnd)
        NotifyWinEvent(EVENT_OBJECT_FOCUS, plv->ci.hwnd, OBJID_CLIENT,
                plv->iFocus+1);
}

//
//  Call this function when the listview has changed in a radical manner.
//  It notifies MSAA that "Whoa, things are completely different now."
//
void ListView_NotifyRecreate(LV *plv)
{
    NotifyWinEvent(EVENT_OBJECT_DESTROY, plv->ci.hwnd, OBJID_CLIENT, CHILDID_SELF);
    NotifyWinEvent(EVENT_OBJECT_CREATE, plv->ci.hwnd, OBJID_CLIENT, CHILDID_SELF);
    plv->iMSAAMin = plv->iMSAAMax = 0;
}

int ListView_OnSetItemCount(LV *plv, int iItems, DWORD dwFlags)
{
   BOOL frt = TRUE;

   // For compatability we assume 0 for flags implies old (Athena) type of functionality and
   // does a Invalidate all otherwise if low bit is set we try to be a bit smarter.  First pass
   // If the first added item is visible invalidate all.  Yes we can do better...
   if (ListView_IsOwnerData(plv))
   {
       int iItem;
       int cTotalItemsOld = plv->cTotalItems;
       BOOL fInvalidateAll = ((dwFlags & LVSICF_NOINVALIDATEALL) == 0);

       if ((iItems >= 0) && (iItems <= MAX_LISTVIEWITEMS))
       {
           plv->cTotalItems = iItems;

           // check focus
           if (plv->iFocus >= iItems)
              plv->iFocus = -1;
          if (plv->iDropHilite >= iItems)
              plv->iDropHilite = -1;

           // check mark
           if (plv->iMark >= iItems)
              plv->iMark = -1;

           // make sure no selections above number of items
           plv->plvrangeCut->lpVtbl->ExcludeRange(plv->plvrangeCut, iItems, SELRANGE_MAXVALUE);
           if (FAILED(plv->plvrangeSel->lpVtbl->ExcludeRange(plv->plvrangeSel, iItems, SELRANGE_MAXVALUE)))
           {
               SetLastError(ERROR_OUTOFMEMORY);
               return FALSE;
           }


           plv->rcView.left = RECOMPUTE;  // recompute view rect

           if (ListView_IsAutoArrangeView(plv)) 
           {
               // Call off to the arrange function.
               ListView_OnArrange(plv, LVA_DEFAULT);

               if (!fInvalidateAll)
               {
                   // Try to be smart and invalidate only what we need to.
                   // Add a little logic to erase any message like no items found when
                   // the view was previously empty...
                   if (cTotalItemsOld < iItems)
                       iItem = cTotalItemsOld;
                   else
                       iItem = iItems - 1;  // Get the index

                   if ((iItem >= 0) && (cTotalItemsOld > 0))
                       ListView_IInvalidateBelow(plv, iItem);
                   else
                       fInvalidateAll = TRUE;
               }

           } 
           else 
           {
               ListView_Recompute(plv);
               // if we have empty text and old count was zero... then we should redraw all
               if (plv->pszEmptyText && (cTotalItemsOld == 0) && (iItems > 0))
                   fInvalidateAll = TRUE;

               // Try to do smart invalidates...
               if (!fInvalidateAll)
               {
                   // Try to be smart and invalidate only what we need to.
                   if (cTotalItemsOld < iItems)
                       iItem = cTotalItemsOld;
                   else
                       iItem = iItems - 1;  // Get the index

                   if (iItem >= 0)
                       ListView_LRInvalidateBelow(plv, iItem, FALSE);
               }


               // We may try to resize the column
               ListView_MaybeResizeListColumns(plv, 0, ListView_Count(plv)-1);

               // For compatability we assume 0 for flags implies old type
               // of functionality and scrolls the important item into view.
               // If second bit is set, we leave the scroll position alone.
               if ((dwFlags & LVSICF_NOSCROLL) == 0)
               {
                   // what is the important item
                   iItem = (plv->iFocus >= 0) ?
                           plv->iFocus :
                           ListView_OnGetNextItem(plv, -1, LVNI_SELECTED);

                   iItem = max(0, iItem);

                   // make important item visable
                   ListView_OnEnsureVisible(plv, iItem, FALSE);
               }
           }


           if (fInvalidateAll)
               InvalidateRect(plv->ci.hwnd, NULL, TRUE);
           ListView_UpdateScrollBars(plv);

           ListView_NotifyRecreate(plv);
           ListView_NotifyFocusEvent(plv);

       } 
       else 
       {
           frt = FALSE;
       }

   }
   else 
   {
       if (plv->hdpaSubItems)
       {
           int iCol;
           for (iCol = plv->cCol - 1; iCol >= 0; iCol--)
           {
               HDPA hdpa = ListView_GetSubItemDPA(plv, iCol);
               if (hdpa)   // this is optional, call backs don't have them
                   DPA_Grow(hdpa, iItems);
           }
       }

       DPA_Grow(plv->hdpa, iItems);
       DPA_Grow(plv->hdpaZOrder, iItems);
    }

    return frt;
}

VOID ListView_InvalidateTTLastHit(LV* plv, int iNewHit)
{
    if (plv->iTTLastHit == iNewHit)
    {
        plv->iTTLastHit = -1;
        if (plv->pszTip && plv->pszTip != LPSTR_TEXTCALLBACK)
        {
            plv->pszTip[0] = 0;
        }
    }
}

typedef struct
{
    LV              *plv;
    BOOL            fSortIndices;
    PFNLVCOMPARE    pfnCompare;
    LPARAM          lParam;
    BOOL            bPassLP;
} LVSortInfo;

int CALLBACK ListView_SortCallback(void * dw1, void * dw2, LPARAM lParam)
{
    LISTITEM *pitem1;
    LISTITEM *pitem2;
    LVSortInfo *pSortInfo = (LVSortInfo *)lParam;

    ASSERT(!ListView_IsOwnerData(pSortInfo->plv));

    // determine whether  dw1 and dw2 are indices or the real items
    // and assign pitem? accordingly
    if (pSortInfo->fSortIndices) 
    {
        pitem1 = ListView_GetItemPtr(pSortInfo->plv, PtrToUlong(dw1));
        pitem2 = ListView_GetItemPtr(pSortInfo->plv, PtrToUlong(dw2));
    } 
    else 
    {
        pitem1 = (LISTITEM *)dw1;
        pitem2 = (LISTITEM *)dw2;
    }

    if (!pSortInfo->pfnCompare) 
    {
        // Treat NULL pszText like null string.
        LPCTSTR pszText1 = pitem1->pszText ? pitem1->pszText : c_szNULL;
        LPCTSTR pszText2 = pitem2->pszText ? pitem2->pszText : c_szNULL;

        // REARCHITECT: should allow callbacks in text
        if (pszText1 != LPSTR_TEXTCALLBACK &&
            pszText2 != LPSTR_TEXTCALLBACK)
        {
            return lstrcmpi(pitem1->pszText, pitem2->pszText);
        }
        RIPMSG(0, "LVM_SORTITEM(EX): Cannot combine NULL callback with LPSTR_TEXTCALLBACK");
        return -1;
    } 
    else
    {
        if (pSortInfo->bPassLP)
            return pSortInfo->pfnCompare(pitem1->lParam, pitem2->lParam, pSortInfo->lParam);
        else 
        {
            if (pSortInfo->fSortIndices)
                return pSortInfo->pfnCompare((LPARAM)dw1, (LPARAM)dw2, pSortInfo->lParam);
            else
            {
                // we want to sort by the indices, but all we've got are pointers to the items
                // and there is no way to get back from that pointer to an index
                RIPMSG(0, "LVM_SORTITEM(EX): Want to sort by indicies, but only have pointers");
                return -1;
            }
        }

    }
    RIPMSG(0, "LVM_SORTITEM(EX): Didn't seem to sort by anything");
    return -1;
}

LISTGROUP* ListView_FindGroupFromID(LV* plv, int iGroupId, int* piIndex)
{
    if (plv->hdpaGroups)
    {
        int cGroups = DPA_GetPtrCount(plv->hdpaGroups);
        int iGroup;
        for (iGroup = 0; iGroup < cGroups; iGroup++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, iGroup);
            if (pgrp->iGroupId == iGroupId)
            {
                if (piIndex)
                    *piIndex = iGroup;
                return pgrp;
            }
        }
    }

    return NULL;

}

BOOL ListView_VerifyGroupIdIsUnique(LV* plv, int iGroupId)
{
    if (plv->hdpaGroups)
    {
        int cGroups = DPA_GetPtrCount(plv->hdpaGroups);
        int iGroup;
        for (iGroup = 0; iGroup < cGroups; iGroup++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, iGroup);
            if (pgrp->iGroupId == iGroupId)
                return FALSE;
        }
    }

    return TRUE;
}

BOOL ListView_RemoveItemFromItsGroup(LV* plv, LISTITEM* pitem)
{
    if (LISTITEM_HASGROUP(pitem))
    {
        LISTGROUP* pgrp = pitem->pGroup;
        int cItems = DPA_GetPtrCount(pgrp->hdpa);
        int iItem;
        for (iItem = 0; iItem < cItems; iItem++)
        {
            LISTITEM* pgitem = DPA_FastGetPtr(pgrp->hdpa, iItem);
            if (pgitem == pitem)
            {
                DPA_DeletePtr(pgrp->hdpa, iItem);
                return TRUE;
            }
        }

    }
    return FALSE;
}

BOOL ListView_FixupGroupsAfterSorting(LV *plv)
{
    BOOL fRet = FALSE;
    int cGroups = DPA_GetPtrCount(plv->hdpaGroups);

    int *rgiGroupIds = LocalAlloc(LPTR, sizeof(int) * cGroups);

    // rgi will be where we keep the index in each group as we add items to them
    int *rgi = LocalAlloc(LPTR, sizeof(int) * cGroups);

    if (rgiGroupIds && rgi)
    {
        int i;
        int iMax = DPA_GetPtrCount(plv->hdpa);

        // Save away the group IDs, and temporary replace them with straight indices
        for (i=0; i < cGroups; i++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, i);
            rgiGroupIds[i] = pgrp->iGroupId;
            pgrp->iGroupId = i;
        }

        // Now all the items are sorted, and all we need to do it put them back in their
        // respective groups is sorted order
        for (i=0; i < iMax;i++)
        {
            LISTITEM *pitem = ListView_FastGetItemPtr(plv, i);
            LISTGROUP* pgrp = LISTITEM_GROUP(pitem);
            if (pgrp)
            {
                ASSERT(pgrp->hdpa);
                DPA_SetPtr(pgrp->hdpa, rgi[pgrp->iGroupId]++, pitem);
            }
        }

#if DEBUG
        // At this point, we should still have the proper number of items in each group!
        for (i=0; i < cGroups; i++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, i);
            ASSERT(DPA_GetPtrCount(pgrp->hdpa) == rgi[i]);
        }
#endif

        // Restore the proper GroupIds now
        for (i=0; i < cGroups; i++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, i);
            pgrp->iGroupId = rgiGroupIds[i];
        }

        fRet = TRUE;
    }
    LocalFree(rgiGroupIds);
    LocalFree(rgi);
    return fRet;
}

BOOL ListView_SortAllColumns(LV* plv, LVSortInfo * psi)
{
    BOOL fReturn;
    ASSERT(!ListView_IsOwnerData(plv));

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    // don't do this optimization if we will need the indices to sort by
    if (psi->bPassLP && 
        ((!plv->hdpaSubItems) || 
         !DPA_GetPtrCount(plv->hdpaSubItems))) 
    {
        psi->fSortIndices = FALSE;
        fReturn = DPA_Sort(plv->hdpa, ListView_SortCallback, (LPARAM)psi);
    } 
    else 
    {
        // if we need to sort several hdpa's, create one DPA of just indices
        // and sort that, then fix up all the dpa's

        // initialize the hdpa with indices
        HDPA hdpa = DPA_Clone(plv->hdpa, NULL);

        fReturn = FALSE;
        if (hdpa) 
        {
            int i, iMax;
            void **ph;
            void **pNewIndices;
            ASSERT(DPA_GetPtrCount(plv->hdpa) == DPA_GetPtrCount(hdpa));
            ph = pNewIndices = DPA_GetPtrPtr(hdpa);
            iMax = DPA_GetPtrCount(hdpa);
            for (i = 0; i < iMax; ph++, i++) 
            {
                *ph = IntToPtr(i);
            }

            psi->fSortIndices = TRUE;
            if (DPA_Sort(hdpa, ListView_SortCallback, (LPARAM)psi)) 
            {
                ph = LocalAlloc(LPTR, sizeof(void *) * iMax);
                if (ph) 
                {
                    int j;
                    void **pSubItems;
                    // we could get here because bPassLP is false, even if we don't have subitems
                    if (plv->hdpaSubItems && DPA_GetPtrCount(plv->hdpaSubItems))
                    {
                        for (i = DPA_GetPtrCount(plv->hdpaSubItems) - 1; i >= 0; i--) 
                        {
                            HDPA hdpaSubItem = ListView_GetSubItemDPA(plv, i);
                            if (hdpaSubItem) 
                            {
                                // make sure it's of the right size
                                while (DPA_GetPtrCount(hdpaSubItem) < iMax) 
                                {
                                    if (DPA_InsertPtr(hdpaSubItem, iMax, NULL) == -1)
                                        goto Bail;
                                }

                                // actually copy across the dpa with the new indices
                                pSubItems = DPA_GetPtrPtr(hdpaSubItem);
                                for (j = 0; j < iMax; j++) 
                                {
                                    ph[j] = pSubItems[PtrToUlong(pNewIndices[j])];
                                }

                                // finally, copy it all back to the pSubItems;
                                memcpy(pSubItems, ph, sizeof(void *) * iMax);
                            }
                        }
                    }

                    // now do the main hdpa
                    pSubItems = DPA_GetPtrPtr(plv->hdpa);
                    for (j = 0; j < iMax; j++) 
                    {
                        ph[j] = pSubItems[PtrToUlong(pNewIndices[j])];
                    }

                    // finally, copy it all back to the pSubItems;
                    memcpy(pSubItems, ph, sizeof(void *) * iMax);
                    fReturn = TRUE;
Bail:
                    LocalFree(ph);
                }
            }
            DPA_Destroy(hdpa);
        }
    }
    if (fReturn && plv->fGroupView && plv->hdpaGroups && DPA_GetPtrCount(plv->hdpaGroups) > 0 && ListView_IsGroupedView(plv))
    {
        fReturn = ListView_FixupGroupsAfterSorting(plv);
    }
    return fReturn;
}

DWORD ListView_OnApproximateViewRect(LV* plv, int iCount, int iWidth, int iHeight)
{
    if (iCount == -1)
        iCount = ListView_Count(plv);

    if (iWidth == -1)
        iWidth = plv->sizeClient.cx;

    if (iHeight == -1)
        iHeight = plv->sizeClient.cy;

    return _ListView_ApproximateViewRect(plv, iCount, iWidth, iHeight);
}

DWORD ListView_OnSetLVRangeObject(LV* plv, int iWhich, ILVRange *plvrange)
{
    ILVRange **pplvrange;
    switch (iWhich)
    {
    case LVSR_SELECTION:
        pplvrange = &plv->plvrangeSel;
        break;
    case LVSR_CUT:
        pplvrange = &plv->plvrangeCut;
        break;
    default:
        return FALSE;
    }
    if (*pplvrange)
    {
        // Release the old one
        (*pplvrange)->lpVtbl->Release(*pplvrange);
    }
    *pplvrange = plvrange;

    // Hold onto the pointer...
    if (plvrange)
        plvrange->lpVtbl->AddRef(plvrange);

    return TRUE;
}


BOOL ListView_OnSortItems(LV *plv, LPARAM lParam, PFNLVCOMPARE pfnCompare, BOOL bPassLP)
{
    LVSortInfo SortInfo;
    LISTITEM *pitemFocused;
    SortInfo.pfnCompare = pfnCompare;
    SortInfo.lParam     = lParam;
    SortInfo.plv = plv;
    SortInfo.bPassLP = bPassLP;

    if (ListView_IsOwnerData(plv)) 
    {
        RIPMSG(0, "LVM_SORTITEMS: Invalid for owner-data listview");
        return FALSE;
    }

    ListView_DismissEdit(plv, TRUE);    // cancel edits

    // we're going to mess with the indices, so stash away the pointer to the
    // focused item.
    if (plv->iFocus != -1) 
    {
        pitemFocused = ListView_GetItemPtr(plv, plv->iFocus);
    } 
    else
        pitemFocused = NULL;

    if (ListView_SortAllColumns(plv, &SortInfo)) 
    {
        // restore the focused item.
        if (pitemFocused) 
        {
            int i;
            for (i = ListView_Count(plv) - 1; i >= 0 ; i--) 
            {
                if (ListView_GetItemPtr(plv, i) == pitemFocused) 
                {
                    plv->iFocus = i;
                    plv->iMark = i;
                }
            }
        }

        if (ListView_IsAutoArrangeView(plv))
        {
            ListView_CommonArrange(plv, LVA_DEFAULT, plv->hdpa);
        }
        else
        {
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        }

        // The items in the view have moved around; let apps know
        NotifyWinEvent(EVENT_OBJECT_REORDER, plv->ci.hwnd, OBJID_CLIENT, 0);
        return TRUE;
    }
    return FALSE;
}


void ListView_EnableWindow(LV* plv, BOOL wParam)
{
    if (wParam) 
    {
        if (plv->ci.style & WS_DISABLED) 
        {
            plv->ci.style &= ~WS_DISABLED;      // enabled
            ListView_OnSetBkColor(plv, plv->clrBkSave);
        }
    } 
    else 
    {
        if (!(plv->ci.style & WS_DISABLED)) 
        {
            plv->clrBkSave = plv->clrBk;
            plv->ci.style |= WS_DISABLED;       // disabled
            ListView_OnSetBkColor(plv, g_clrBtnFace);
        }
    }
    RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
}


BOOL ListView_IsItemVisibleI(LV* plv, int i)
// Assumes parmss ok etc for speed. Called inside region calc code.
{
    RECT rcBounds;

    // get bounding rect of item
    ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, NULL, &rcBounds, NULL);

    // Should perf this up for multimonitor case where there are dead zones in work area...
    return RECTS_IN_SIZE(plv->sizeClient, rcBounds);
}


// Helper for ListView_RecalcRegion
#define BitOn(lpbits, x, y, cx) (*((BYTE *)(lpbits + ((y * cx) + (x / 8)))) & (0x80 >> (x % 8)))

void ListView_RecalcRegion(LV* plv, BOOL fForce, BOOL fRedraw)
{
    HRGN hrgnUnion = NULL;
    HRGN hrgn = NULL;
    int i;
    HDC hdc = NULL;
    BYTE * lpBits = NULL;
    HBITMAP hbmp = NULL, hbmpOld = NULL;
    RECT rc, rcIcon = {0};
    LISTITEM * pitem;
    BITMAP bm;

    // Bail out if we don't need to do any work
    if (!(plv->exStyle & LVS_EX_REGIONAL) || !ListView_RedrawEnabled(plv) ||
        (plv->flags & LVF_INRECALCREGION))
        return;

    // To prevent recursion
    plv->flags |= LVF_INRECALCREGION;

    if ((ListView_Count(plv) > 0))
    {
        int cxIcon, cyIcon;
        int dxOffset, dyOffset;

        // Run through first to see if anything changed - bail if not!
        if (!fForce)
        {
            for (i = 0; i < ListView_Count(plv); i++)
            {
                pitem = ListView_FastGetItemPtr(plv, i);

                if (!ListView_IsItemVisibleI(plv, i))
                {
                    if (pitem->hrgnIcon == (HANDLE)-1 || !pitem->hrgnIcon)
                        // Item was invisible and still is. Nothing changed.
                        continue;

                    if (pitem->hrgnIcon)
                    {
                        // Item was visible and now is invisible... Something
                        // changed.
                        pitem->ptRgn.x = RECOMPUTE;
                        pitem->ptRgn.y = RECOMPUTE;
                        DeleteObject(pitem->hrgnIcon);
                        pitem->hrgnIcon = NULL;
                    }
                }

                ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, &rc, NULL, NULL);

                // If the location of the icon or the text rectangle have
                // changed, then we need to continue so that we can recalculate
                // the region.
                if ((pitem->pt.x != pitem->ptRgn.x) ||
                    (pitem->pt.y != pitem->ptRgn.y) ||
                    (!pitem->hrgnIcon) ||
                    !EqualRect((CONST RECT *)&pitem->rcTextRgn, (CONST RECT *)&rc))
                    goto changed;

            }
            // If we go through all the items and nothing changed, then
            // we can return without doing any work!
            ASSERT(i == ListView_Count(plv));
            goto exit;
changed:;
        }

        // Figure out the dimensions of the Icon rectangle - assumes
        // each Icon rectangle is the same size.
        ListView_GetRects(plv, 0, QUERY_DEFAULT, &rcIcon, NULL, NULL, NULL);

        // Center the icon in the rectangle
        CCGetIconSize(&plv->ci, plv->himl, &cxIcon, &cyIcon);

        dxOffset = (rcIcon.right - rcIcon.left - cxIcon) / 2;
        dyOffset = (rcIcon.bottom - rcIcon.top - cyIcon) / 2;
        cxIcon = rcIcon.right - rcIcon.left;
        cyIcon = rcIcon.bottom - rcIcon.top;

        if (!(hdc = CreateCompatibleDC(NULL)) ||
            (!(hbmp = CreateBitmap(cxIcon, cyIcon, 1, 1, NULL)))) 
        {
            goto BailOut;
        }

        GetObject(hbmp, sizeof(bm), &bm);

        if (!(lpBits = (BYTE *)GlobalAlloc(GPTR, bm.bmWidthBytes * bm.bmHeight)))
            goto BailOut;

        hbmpOld = SelectObject(hdc, hbmp);
        PatBlt(hdc, 0, 0, cxIcon, cyIcon, WHITENESS);

        if (hrgnUnion = CreateRectRgn(0, 0, 0, 0)) 
        {
            for (i = 0; i < ListView_Count(plv); i++)
            {
                int x, y, iResult;
                BOOL fStarted = FALSE;
                LPRECT lprc;

                pitem = ListView_FastGetItemPtr(plv, i);

                if (pitem->pt.y == RECOMPUTE)
                    continue;

                if (!ListView_IsItemVisibleI(plv, i))
                {
                    // ignore invisible items
                    if (pitem->hrgnIcon && pitem->hrgnIcon!=(HANDLE)-1)
                    {
                        pitem->ptRgn.x = RECOMPUTE;
                        pitem->ptRgn.y = RECOMPUTE;
                        DeleteObject(pitem->hrgnIcon);
                        pitem->hrgnIcon = (HANDLE)-1;
                    }
                    continue;
                }

                // Add the region for the icon text first
                ListView_GetRects(plv, i, QUERY_DEFAULT, &rcIcon, &rc, NULL, NULL);

                // If we're in edit mode always use rcTextRgn
                if (i == plv->iEdit)
                    lprc = &pitem->rcTextRgn;
                else
                    lprc = &rc;

                if (!(hrgn = CreateRectRgnIndirect(lprc)))
                    goto Error;

                iResult = CombineRgn(hrgnUnion, hrgn, hrgnUnion, RGN_OR);

                DeleteObject(hrgn);

                if (iResult == ERROR)
                {
                    // Error case - out of memory.  Just select in a NULL region.
Error:
                    DeleteObject(hrgnUnion);
                    hrgnUnion = NULL;
                    break;
                }

                // Succeeded, copy the rectangle to rcTextRgn so we
                // can test against it in the future.  Don't copy over
                // it if we are in edit mode, the rectangle is used to
                // store the edit window in that case.
                if (plv->iEdit != i)
                    CopyRect(&pitem->rcTextRgn, (CONST RECT *)&rc);

                // Now create a region for the icon mask - or use the cached one
                if (!pitem->hrgnIcon || pitem->hrgnIcon == (HANDLE)-1)
                {
//                    (pitem->pt.x != pitem->ptRgn.x) ||
//                    (pitem->pt.y != pitem->ptRgn.y))
                    HRGN hrgnIcon = NULL;

                    // On slow machines, we'll just wrap the icon with a rectangle.  But on
                    // faster machines, we'll build a region that corresponds to the
                    // mask for the icon so it looks sweet.
                    if (g_fSlowMachine) 
                    {
                        // Modify the rectangle slightly so it looks better

                        // Glue the icon and text rectangles together
                        rcIcon.bottom = rc.top;
                        // Shrink the width of the rectangle so it's only as big as the icon itself
                        InflateRect(&rcIcon, -dxOffset, 0);
                        hrgnIcon = CreateRectRgnIndirect(&rcIcon);
                    }
                    else
                    {
                        // If the image isn't around, get it now.
                        if (pitem->iImage == I_IMAGECALLBACK)
                        {
                            LV_ITEM item;

                            item.iItem = i;
                            item.iSubItem = 0;
                            item.mask = LVIF_IMAGE;
                            item.stateMask = LVIS_ALL;
                            item.pszText = NULL;
                            item.cchTextMax = 0;
                            // BOGUS - do we need to worry about our state
                            // getting messed up during the callback?
                            ListView_OnGetItem(plv, &item);
                        }

                        ImageList_Draw(plv->himl, pitem->iImage, hdc, 0, 0, ILD_MASK | (pitem->state & LVIS_OVERLAYMASK));

                        GetBitmapBits(hbmp, bm.bmWidthBytes * bm.bmHeight, (void *)lpBits);

                        for (y = 0; y < cyIcon; y++)
                        {
                            for (x = 0; x < cxIcon; x++)
                            {
                                if (!fStarted && !BitOn(lpBits, x, y, bm.bmWidthBytes))
                                {
                                    rc.left = x;
                                    rc.top = y;
                                    rc.bottom = y + 1;
                                    fStarted = TRUE;
                                    if (x == (cxIcon - 1))
                                    {
                                        x++;
                                        goto AddIt;
                                    }
                                    else
                                    {
                                        continue;
                                    }
                                }

                                if (fStarted && BitOn(lpBits, x, y, bm.bmWidthBytes))
                                {
AddIt:
                                    rc.right = x;
                                    //
                                    // Mirror the region so that the icons get displayed ok. [samera]
                                    //
                                    if (plv->ci.dwExStyle & RTL_MIRRORED_WINDOW)
                                    {
                                        int iLeft = rc.left;
                                        rc.left = (cxIcon - (rc.right+1));
                                        rc.right = (cxIcon - (iLeft+1));
                                        OffsetRect(&rc, rcIcon.left - dxOffset, rcIcon.top + dyOffset);
                                    }
                                    else
                                        OffsetRect(&rc, rcIcon.left + dxOffset, rcIcon.top + dyOffset);


                                    if (hrgn = CreateRectRgnIndirect(&rc))
                                    {
                                        if (hrgnIcon || (hrgnIcon = CreateRectRgn(0, 0, 0, 0)))
                                            iResult = CombineRgn(hrgnIcon, hrgn, hrgnIcon, RGN_OR);
                                        else
                                            iResult = ERROR;

                                        DeleteObject(hrgn);
                                    }

                                    if (!hrgn || (iResult == ERROR))
                                    {
                                        if (hrgnIcon)
                                            DeleteObject(hrgnIcon);
                                        goto Error;
                                    }

                                    fStarted = FALSE;
                                }
                            }
                        }
                    }

                    if (hrgnIcon)
                    {
                        // Cache it since it takes a long time to build it
                        if (pitem->hrgnIcon && pitem->hrgnIcon != (HANDLE)-1)
                            DeleteObject(pitem->hrgnIcon);
                        pitem->hrgnIcon = hrgnIcon;
                        pitem->ptRgn = pitem->pt;

                        // Add it to the accumulated window region
                        if (ERROR == CombineRgn(hrgnUnion, hrgnIcon, hrgnUnion, RGN_OR))
                            goto Error;
                    }
                }
                else
                {
                    OffsetRgn(pitem->hrgnIcon, pitem->pt.x - pitem->ptRgn.x, pitem->pt.y - pitem->ptRgn.y);
                    pitem->ptRgn = pitem->pt;
                    if (ERROR == CombineRgn(hrgnUnion, pitem->hrgnIcon, hrgnUnion, RGN_OR))
                        goto Error;
                }
            }
        }
    }

BailOut:
    if (lpBits)
        GlobalFree((HGLOBAL)lpBits);
    if (hbmp)
    {
        SelectObject(hdc, hbmpOld);
        DeleteObject(hbmp);
    }
    if (hdc)
        DeleteDC(hdc);

    // Windows takes ownership of the region when we select it in to the window
    SetWindowRgn(plv->ci.hwnd, hrgnUnion, fRedraw);

exit:
    plv->flags &= ~LVF_INRECALCREGION;
}

HIMAGELIST CreateCheckBoxImagelist(HIMAGELIST himl, BOOL fTree, BOOL fUseColorKey, BOOL fMirror)
{
    int cxImage, cyImage;
    HBITMAP hbm;
    HBITMAP hbmTemp;
    COLORREF clrMask = CLR_DEFAULT;
    HDC hdcDesk = GetDC(NULL);
    HDC hdc;
    RECT rc;
    int nImages = fTree ? 3 : 2;
    HTHEME hTheme;
    DTBGOPTS dtbg = {sizeof(DTBGOPTS), DTBG_DRAWSOLID, 0,};   // tell drawthemebackground to preserve the alpha channel

    if (!hdcDesk)
        return NULL;

    hdc = CreateCompatibleDC(hdcDesk);
    ReleaseDC(NULL, hdcDesk);

    if (!hdc)
        return NULL;

    hTheme = OpenThemeData(NULL, L"Button");


    // Must protect against ImageList_GetIconSize failing in case app
    // gave us a bad himl
    if (himl && ImageList_GetIconSize(himl, &cxImage, &cyImage))
    {
        // cxImage and cyImage are okay
    }
    else
    {
        cxImage = g_cxSmIcon;
        cyImage = g_cySmIcon;
    }

    himl = ImageList_Create(cxImage, cyImage, ILC_MASK | ILC_COLOR32, 0, nImages);
    hbm = CreateColorBitmap(cxImage * nImages, cyImage);

    // fill
    hbmTemp = SelectObject(hdc, hbm);
    rc.left = rc.top = 0;
    rc.bottom = cyImage;
    rc.right = cxImage * nImages;

    if (!hTheme)
    {
        if (fUseColorKey)
        {
            clrMask = RGB(255,000,255); // magenta
            if (clrMask == g_clrWindow)
                clrMask = RGB(000,000,255); // blue
        }
        else
        {
            clrMask = g_clrWindow;
        }

        // Don't fill the image with the mask when themes are on. We want this to 
        // "Alpha blend to zero" or be clear. No transparent blt needed.
        FillRectClr(hdc, &rc, clrMask);
    }

    rc.right = cxImage;
    // now draw the real controls on
    InflateRect(&rc, -g_cxEdge, -g_cyEdge);
    rc.right++;
    rc.bottom++;

    if (fTree)
        OffsetRect(&rc, cxImage, 0);

    if (hTheme)
    {
        DrawThemeBackgroundEx(hTheme, hdc, BP_CHECKBOX, CBS_UNCHECKEDNORMAL, &rc, &dtbg);
    }
    else
    {
        DrawFrameControl(hdc, &rc, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_FLAT | 
            (fUseColorKey? 0 : DFCS_TRANSPARENT));
    }

    OffsetRect(&rc, cxImage, 0);
    // [msadek]; For the mirrored case, there is an off-by-one somewhere in MirrorIcon() or System API.
    // Since I will not be touching MirrorIcon() by any mean and no chance to fix a system API,
    // let's compensate for it here.
    if (fMirror)
    {
        OffsetRect(&rc, -1, 0);  
    }

    if (hTheme)
    {
        DrawThemeBackgroundEx(hTheme, hdc, BP_CHECKBOX, CBS_CHECKEDNORMAL, &rc, &dtbg);
    }
    else
    {
        DrawFrameControl(hdc, &rc, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_FLAT | DFCS_CHECKED | 
            (fUseColorKey? 0 : DFCS_TRANSPARENT));
    }

    SelectObject(hdc, hbmTemp);

    if (fUseColorKey)
    {
        ImageList_AddMasked(himl, hbm, clrMask);
    }
    else
    {
        ImageList_Add(himl, hbm, NULL);
    }

    if (fMirror)
    {
        HICON hIcon = ImageList_ExtractIcon(0, himl, nImages-1);
        MirrorIcon(&hIcon, NULL);
        ImageList_ReplaceIcon(himl, nImages-1, hIcon);
    }

    DeleteDC(hdc);
    DeleteObject(hbm);
    if (hTheme)
        CloseThemeData(hTheme);
    return himl;
}

void ListView_InitCheckBoxes(LV* plv, BOOL fInitializeState)
{
    HIMAGELIST himlCopy = (plv->himlSmall ? plv->himlSmall : plv->himl);
    HIMAGELIST himl;
    BOOL bMirror = FALSE;
    // [msadek], CheckBoxed need not to be mirrored.
    // mirroer it during imagelist creation time so that it displays correctly
    
    himl = CreateCheckBoxImagelist(himlCopy, FALSE, TRUE, IS_WINDOW_RTL_MIRRORED(plv->ci.hwnd));
    ImageList_SetBkColor(himl, IsUsingCleartype()? (plv->clrBk) : (CLR_NONE));
    ListView_OnSetImageList(plv, himl, LVSIL_STATE);

    if (fInitializeState)
        ListView_OnSetItemState(plv, -1, INDEXTOSTATEIMAGEMASK(1), LVIS_STATEIMAGEMASK);
}

void ListView_PopBubble(LV *plv)
{
    if (plv->hwndToolTips)
        SendMessage(plv->hwndToolTips, TTM_POP, 0, 0);
}

DWORD ListView_ExtendedStyleChange(LV* plv, DWORD dwNewStyle, DWORD dwExMask)
{
    DWORD dwOldStyle = plv->exStyle;

    // this will change the listview report size and painting algorithm
    // because of the leading edge, so need to re-update scroll bars
    // and repaint everything
    if (ListView_IsReportView(plv))
    {
        ListView_RUpdateScrollBars(plv);
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    // Change of styles may also changes tooltip policy, so pop it
    ListView_PopBubble(plv);

    if (dwExMask)
        dwNewStyle = (plv->exStyle & ~ dwExMask) | (dwNewStyle & dwExMask);

    // Currently, LVS_EX_REGIONAL, LVS_EX_MULTIWORKAREAS, LVS_EX_HIDELABELS, and
    // LVS_EX_SINGLEROW are only supported for large icon view
    if (!ListView_IsIconView(plv)) 
    {
        dwNewStyle &= ~(LVS_EX_REGIONAL | LVS_EX_MULTIWORKAREAS | LVS_EX_HIDELABELS | LVS_EX_SINGLEROW);
    }

    // LVS_EX_REGIONAL and LVS_EX_SINGLEROW are not supported for ownerdata
    if (ListView_IsOwnerData(plv)) 
    {
        dwNewStyle &= ~(LVS_EX_REGIONAL | LVS_EX_SINGLEROW);
    }

    plv->exStyle = dwNewStyle;

    // do any invalidation or whatever is needed here.
    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_HIDELABELS)
    {
        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_GRIDLINES) 
    {
        if (ListView_IsReportView(plv))
        {
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        }
    }

    if ((dwOldStyle ^ dwNewStyle) & (LVS_EX_UNDERLINEHOT | LVS_EX_UNDERLINECOLD |
                                     LVS_EX_ONECLICKACTIVATE | LVS_EX_TWOCLICKACTIVATE |
                                     LVS_EX_SUBITEMIMAGES | LVS_EX_SNAPTOGRID)) 
    {
        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_CHECKBOXES) 
    {
        if (dwNewStyle & LVS_EX_CHECKBOXES) 
        {
            ListView_InitCheckBoxes(plv, TRUE);
        } 
        else 
        {
            // destroy the check boxes!
            HIMAGELIST himl = ListView_OnSetImageList(plv, NULL, LVSIL_STATE);
            if (himl)
                ImageList_Destroy(himl);
        }
    }

    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_FLATSB) 
    {
        if (dwNewStyle & LVS_EX_FLATSB) 
        {
            InitializeFlatSB(plv->ci.hwnd);
            if (plv->hwndHdr)
            {
                SetWindowBits(plv->hwndHdr, GWL_STYLE, HDS_FLAT, HDS_FLAT);
            }
        } 
        else 
        {
            if (plv->hwndHdr)
            {
                SetWindowBits(plv->hwndHdr, GWL_STYLE, HDS_FLAT, 0);
            }
            UninitializeFlatSB(plv->ci.hwnd);
        }
    }

    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_REGIONAL) 
    {
        g_fSlowMachine = FALSE;

        if (dwNewStyle & LVS_EX_REGIONAL) 
        {
            ListView_RecalcRegion(plv, TRUE, TRUE);
        } 
        else 
        {
            int i;
            LISTITEM * pitem;

            // Delete all the cached regions, then NULL out our selected region.
            for (i = 0; i < ListView_Count(plv); i++) 
            {
                pitem = ListView_FastGetItemPtr(plv, i);
                if (pitem->hrgnIcon && pitem->hrgnIcon!=(HANDLE)-1) 
                {
                    DeleteObject(pitem->hrgnIcon);
                }
                pitem->hrgnIcon = NULL;
            }
            SetWindowRgn(plv->ci.hwnd, (HRGN)NULL, TRUE);
        }
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    if ((dwOldStyle ^ dwNewStyle) & LVS_EX_SINGLEROW)
    {
        _ListView_RecomputeEx(plv, NULL, 0, TRUE);
    }

    if (ListView_IsDoubleBuffer(plv))
    {
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    return dwOldStyle;
}

// Bug#94368 raymondc v6.0:  Doesn't detect WM_WINDOWPOSCHANGING as a way
// of being shown.  NT5 defview has to hack around it pretty grossly.
// Fix for v6.0.

void LV_OnShowWindow(LV* plv, BOOL fShow)
{
    if (fShow)
    {
        if (!(plv->flags & LVF_VISIBLE))
        {
            plv->flags |= LVF_VISIBLE;
            if (plv->fGroupView)
                _ListView_RecomputeEx(plv, NULL, 0, FALSE);
            ListView_UpdateScrollBars(plv);
        }
    } 
    else
        plv->flags &= ~LVF_VISIBLE;

}

LRESULT ListView_OnHelp(LV* plv, LPHELPINFO lpHelpInfo)
{

    //  If we're seeing WM_HELP because of our child header control, then
    //  munge the HELPINFO structure to use the ListView's control id.
    //  win\core\user\combo.c has similiar code to handle the child edit
    //  control of a combo box.
    if ((lpHelpInfo != NULL) && (plv->wView == LV_VIEW_DETAILS) &&
        (lpHelpInfo->iCtrlId == LVID_HEADER)) 
    {

        lpHelpInfo->hItemHandle = plv->ci.hwnd;
        lpHelpInfo->iCtrlId = GetWindowID(plv->ci.hwnd);
        //  Shouldn't have to do this: USER would have filled in the appropriate
        //  context id by walking up the parent hwnd chain.
        //lpHelpInfo->dwContextId = GetContextHelpId(hwnd);

    }

    return DefWindowProc(plv->ci.hwnd, WM_HELP, 0, (LPARAM)lpHelpInfo);

}

DWORD ListView_OnSetIconSpacing(LV* plv, LPARAM lParam)
{
    DWORD dwOld = MAKELONG(plv->cxIconSpacing, plv->cyIconSpacing);

    int cxIconSpacing, cyIconSpacing;

    if (lParam == (LPARAM)-1) 
    {
        // go back to using defaults
        plv->flags &= ~LVF_ICONSPACESET;
        cxIconSpacing = (plv->cxIcon + (g_cxIconSpacing - g_cxIcon));
        cyIconSpacing = (plv->cyIcon + (g_cyIconSpacing - g_cyIcon));
    } 
    else 
    {
        if (LOWORD(lParam))
        {
            cxIconSpacing = LOWORD(lParam);
            if (ListView_IsDPIScaled(plv))
                CCDPIScaleX(&cxIconSpacing);
        }
        else
        {
            cxIconSpacing = plv->cxIconSpacing;
        }

        if (HIWORD(lParam))
        {
            cyIconSpacing = HIWORD(lParam);
            if (ListView_IsDPIScaled(plv))
                CCDPIScaleY(&cyIconSpacing);
        }
        else
        {
            cyIconSpacing = plv->cyIconSpacing;
        }

        plv->flags |= LVF_ICONSPACESET;
    }

    if ((cxIconSpacing != plv->cxIconSpacing) || 
        (cyIconSpacing != plv->cyIconSpacing))
    {
        plv->cxIconSpacing = cxIconSpacing;
        plv->cyIconSpacing = cyIconSpacing;

        plv->rcView.left = RECOMPUTE;

        // Recomputing is necessary except when snap-to-grid is toggled. Snap to grid assumes icon spacing
        // is the grid, however this is the only style that makes this assumption.
        if(!(plv->exStyle & LVS_EX_SNAPTOGRID))
            _ListView_RecomputeEx(plv, NULL, 0, TRUE);

        plv->iFreeSlot = -1;
    }

    return dwOld;
}

BOOL ListView_OnSetCursorMsg(LV* plv)
{
    if (plv->exStyle & (LVS_EX_ONECLICKACTIVATE|LVS_EX_TWOCLICKACTIVATE))
    {
        if (plv->iHot != -1)
        {
            if (((plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickOK)) ||
                ListView_OnGetItemState(plv, plv->iHot, LVIS_SELECTED))
            {
                if (!plv->hCurHot)
                {
                    plv->hCurHot = LoadCursor(NULL, IDC_HAND);
                }

                SetCursor(plv->hCurHot);

                return TRUE;
            }
        }
    }

    return FALSE;
}

void ListView_OnSetHotItem(LV* plv, int iItem)
{
    if (iItem != plv->iHot) 
    {
        if ((plv->exStyle & LVS_EX_ONECLICKACTIVATE) ||
            (plv->exStyle & LVS_EX_TWOCLICKACTIVATE)) // We only change visuals for hot with Underline
        {
            BOOL fSelectOnly;
            UINT uInvalidateFlags = RDW_INVALIDATE;
            BOOL fBlended = FALSE;
        
            // Check to see if the item we are making not is in a blended state
            if (iItem != -1)
            {
                // Cut is blended so we need to erase...
                fBlended = ListView_OnGetItemState(plv, iItem, LVIS_CUT);
                if (!fBlended)
                    fBlended = ListView_OnGetItemState(plv, iItem, LVIS_SELECTED);
            }

            // If we need to erase either one then we erase both. 
            if (plv->iHot != -1 && ListView_IsValidItemNumber(plv, plv->iHot) && !fBlended)
            {
                // Cut is blended so we need to erase...
                fBlended = ListView_OnGetItemState(plv, plv->iHot, LVIS_CUT);
                if (!fBlended)
                    fBlended = ListView_OnGetItemState(plv, plv->iHot, LVIS_SELECTED);
            }

            if (ImageList_GetFlags(plv->himl) & ILC_COLOR32)
                fBlended = TRUE;

            // Affects only apply if double buffering
            if (ListView_IsDoubleBuffer(plv) ||
                plv->fListviewShadowText ||
                fBlended)
            {
                uInvalidateFlags |= RDW_ERASE;
            }

            fSelectOnly = ListView_FullRowSelect(plv);

        
            ListView_InvalidateItemEx(plv, plv->iHot, fSelectOnly, uInvalidateFlags, LVIF_TEXT | LVIF_IMAGE);
            ListView_InvalidateItemEx(plv, iItem, fSelectOnly, uInvalidateFlags, LVIF_TEXT | LVIF_IMAGE);
        }
        plv->iHot = iItem;
    }
}


BOOL fShouldFirstClickActivate()
{
    static BOOL fInited = FALSE;
    static BOOL fActivate = TRUE;
    if (!fInited)
    {
        long cb = 0;
        if (RegQueryValue(HKEY_CURRENT_USER, TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\NoFirstClickActivate"),
                      NULL, &cb) == ERROR_SUCCESS)
        {
            fActivate = FALSE;
        }
        fInited = TRUE;
    }
    return fActivate;
}

BOOL ChildOfDesktop(HWND hwnd)
{
    return IsChild(GetShellWindow(), hwnd);
}


void ListView_OnMouseMove(LV* plv, int x, int y, UINT uFlags)
{
    int iItem;
    LV_HITTESTINFO ht;
    NMLISTVIEW nm;

    ht.pt.x = x;
    ht.pt.y = y;
    iItem = ListView_OnSubItemHitTest(plv, &ht);
    if (ht.iSubItem != 0) 
    {
        // if we're not in full row select,
        // hitting on a subitem is like hitting on nowhere
        // also, in win95, ownerdraw fixed effectively had full row select
        if (!ListView_FullRowSelect(plv) &&
            !(plv->ci.style & LVS_OWNERDRAWFIXED)) 
        {
            iItem = -1;
            ht.flags = LVHT_NOWHERE;
        }
    }

    if (ht.flags & LVHT_NOWHERE ||
       ht.flags & LVHT_ONITEMSTATEICON) 
    {
        iItem = -1; // this is possible in the list mode (sigh)
    }

    nm.iItem = iItem;
    nm.iSubItem = ht.iSubItem;
    nm.uChanged = 0;
    nm.ptAction.x = x;
    nm.ptAction.y = y;

    if (!CCSendNotify(&plv->ci, LVN_HOTTRACK, &nm.hdr)) 
    {

#ifdef DEBUG
        if ((nm.iItem != -1) && nm.iSubItem != 0)
            nm.iItem = -1;
#endif

        ListView_OnSetHotItem(plv, nm.iItem);
        // Ensure our cursor is correct now since the WM_SETCURSOR
        // message was already generated for this mouse event.
        ListView_OnSetCursorMsg(plv);

        // this lets us know when we've left an item
        // and can then reselect/toggle it on hover events
        if (iItem != plv->iNoHover) 
        {
            plv->iNoHover = -1;
        }
    }
}

BOOL EditBoxHasFocus()
{
    HWND hwndFocus = GetFocus();
    if (hwndFocus)
    {
        if (SendMessage(hwndFocus, WM_GETDLGCODE, 0, 0) & DLGC_HASSETSEL)
            return TRUE;
    }

    return FALSE;
}

void ListView_OnMouseHover(LV* plv, int x, int y, UINT uFlags)
{
    int iItem;
    BOOL bSelected;
    LV_HITTESTINFO ht;
    BOOL fControl;
    BOOL fShift;
    BOOL fNotifyReturn = FALSE;

    if (GetCapture() || !ChildOfActiveWindow(plv->ci.hwnd) ||
       EditBoxHasFocus())
        return;  // ignore hover while editing or any captured (d/d) operation

    if (CCSendNotify(&plv->ci, NM_HOVER, NULL))
    {
        return;
    }

    // REVIEW: right button implies no shift or control stuff
    // Single selection style also implies no modifiers
    //if (RIGHTBUTTON(keyFlags) || (plv->ci.style & LVS_SINGLESEL))
    if ((plv->ci.style & LVS_SINGLESEL)) 
    {
        fControl = FALSE;
        fShift = FALSE;
    } 
    else 
    {
        fControl = GetAsyncKeyState(VK_CONTROL) < 0;
        fShift = GetAsyncKeyState(VK_SHIFT) < 0;
    }

    ht.pt.x = x;
    ht.pt.y = y;
    iItem = ListView_OnHitTest(plv, &ht);

    if (iItem == -1 ||
        iItem == plv->iNoHover)
        return;

    //before we hover select we launch any pending item
    //this prevents clicking on one item and hover selecting other before
    //the timer goes off which result in wrong item being launched
    if (plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickHappened && plv->fOneClickOK)
    {
        HWND hwnd = plv->ci.hwnd;

        KillTimer(plv->ci.hwnd, IDT_ONECLICKHAPPENED);
        plv->fOneClickHappened = FALSE;
        CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &(plv->nmOneClickHappened.hdr));
        if (!IsWindow(hwnd))
            return;
    }

    plv->iNoHover = iItem;
    bSelected = ListView_OnGetItemState(plv, iItem, LVIS_SELECTED);

    if (ht.flags & (LVHT_ONITEMLABEL | LVHT_ONITEMICON))
    {
        UINT keyFlags = 0;

        if (fShift)
            keyFlags |= MK_SHIFT;
        if (fControl)
            keyFlags |= MK_CONTROL;

        if (!bSelected) 
        {
            // if it wasn't selected, we're about to select it... play
            // a little ditty for us...
            CCPlaySound(c_szSelect);
        }

        ListView_ButtonSelect(plv, iItem, keyFlags, bSelected);

        if (fControl)
        {
            ListView_SetFocusSel(plv, iItem, !fShift, FALSE, !fShift);
        }

        if (!fShift)
            plv->iMark = iItem;

        ListView_OnSetCursorMsg(plv);

        SetFocus(plv->ci.hwnd);    // activate this window
    }
}

BOOL EqualRects(LPRECT prcNew, LPRECT prcOld, int nRects)
{
    int i;
    for (i = 0; i < nRects; i++)
        if (!EqualRect(&prcNew[i], &prcOld[i]))
            return FALSE;
    return TRUE;
}

BOOL ListView_FindWorkArea(LV * plv, POINT pt, short * piWorkArea)
{
    int iWork;
    for (iWork = 0; iWork < plv->nWorkAreas; iWork++)
    {
        if (PtInRect(&plv->prcWorkAreas[iWork], pt))
        {
            *piWorkArea = (short)iWork;
            return TRUE;
        }
    }

    // (dli) default case is the primary work area
    *piWorkArea = 0;
    return FALSE;
}

void ListView_BullyIconsOnWorkarea(LV * plv, HDPA hdpaLostItems)
{
    int ihdpa;
    int iFree = -1;  // the last free slot number
    LVFAKEDRAW lvfd;
    LV_ITEM item;

    // Caller should've filtered this case out
    ASSERT(DPA_GetPtrCount(hdpaLostItems) > 0);

    // Set up in case caller is customdraw
    ListView_BeginFakeCustomDraw(plv, &lvfd, &item);
    item.mask = LVIF_PARAM;
    item.iSubItem = 0;

    // Go through my hdpa list of lost icons and try to place them within bound
    for (ihdpa = 0; ihdpa < DPA_GetPtrCount(hdpaLostItems); ihdpa++)
    {
        POINT ptNew, pt;
        RECT rcBound = {0};
        int cxBound, cyBound;
        int iWidth, iHeight;
        int iItem;
        LISTITEM * pitem;

        iItem = PtrToUlong(DPA_GetPtr(hdpaLostItems, ihdpa));
        pitem = ListView_FastGetItemPtr(plv, iItem);
        pt = pitem->pt;

        iWidth  = RECTWIDTH(plv->prcWorkAreas[pitem->iWorkArea]);
        iHeight = RECTHEIGHT(plv->prcWorkAreas[pitem->iWorkArea]);

        ListView_GetRects(plv, iItem, QUERY_DEFAULT, NULL, NULL, &rcBound, NULL);
        cxBound = RECTWIDTH(rcBound);
        cyBound = RECTHEIGHT(rcBound);

        pt.x -= plv->prcWorkAreas[pitem->iWorkArea].left;
        pt.y -= plv->prcWorkAreas[pitem->iWorkArea].top;

        if (pt.x < (-cxBound / 2))
        {
            ptNew.x = 0;
        }
        else if (pt.x > (iWidth - (cxBound / 2))) 
        {
            ptNew.x = iWidth - cxBound;
        }
        else
            ptNew.x = pt.x;

        if (pt.y < (-cyBound/2))
        {
            ptNew.y = 0;
        }
        else if (pt.y > (iHeight - (cyBound / 2))) 
        {
            ptNew.y = iHeight - cyBound;
        }
        else
            ptNew.y = pt.y;

        if ((ptNew.x != pt.x) || (ptNew.y != pt.y))
        {
            BOOL fUpdate;
            RECT rcTest;
            ptNew.x += plv->prcWorkAreas[pitem->iWorkArea].left;
            ptNew.y += plv->prcWorkAreas[pitem->iWorkArea].top;

            // See if the potential rectangle intersects other items.
            rcTest.left = ptNew.x - plv->ptOrigin.x;
            rcTest.top = ptNew.y - plv->ptOrigin.y;
            rcTest.right = rcTest.left + cxBound;
            rcTest.bottom = rcTest.top + cyBound;

            item.iItem = iItem;
            item.lParam = pitem->lParam;
            ListView_BeginFakeItemDraw(&lvfd);

            if (!ListView_IsCleanRect(plv, &rcTest, iItem, QUERY_DEFAULT, &fUpdate, lvfd.nmcd.nmcd.hdc))
            {
                // doh! We hit another item, let's try to find an available location
                // for this item
                BOOL fUpdateSB;
                BOOL fAppendAtEnd = FALSE;
                int  iWidth, iHeight;
                int cSlots = ListView_GetSlotCountEx(plv, FALSE, pitem->iWorkArea, &iWidth, &iHeight);
                iFree = ListView_FindFreeSlot(plv, iItem, iFree + 1, cSlots, QUERY_DEFAULT, &fUpdateSB, &fAppendAtEnd, lvfd.nmcd.nmcd.hdc, iWidth, iHeight);
                if (iFree == -1)
                    goto SetFirstGuess;
                ListView_SetIconPos(plv, pitem, iFree, cSlots);
                ListView_EndFakeItemDraw(&lvfd);
                continue;
            }
SetFirstGuess:
            ListView_EndFakeItemDraw(&lvfd);
            ListView_OnSetItemPosition(plv, iItem, ptNew.x, ptNew.y);
        }
    }
    ListView_EndFakeCustomDraw(&lvfd);
}

#define DPA_LAST    0x7fffffff

//
// ListView_OnSetWorkAreas
//
// set the "work areas" for the list view.
// the "work areas" are a group of sub rectanges of the list view client rect
// where icons are aranged, and parked by default.
//
void ListView_OnSetWorkAreas(LV* plv, int nWorkAreas, LPRECT prc)
{
    int iWork;
    HDPA hdpaLostItems = NULL;
    RECT rcOldWorkAreas[LV_MAX_WORKAREAS];

    BOOL bAutoArrange = plv->ci.style & LVS_AUTOARRANGE;
    int nOldWorkAreas = plv->nWorkAreas;

    if (nOldWorkAreas > 0)
    {
        ASSERT(plv->prcWorkAreas != NULL);
        memcpy(&rcOldWorkAreas[0], &plv->prcWorkAreas[0], sizeof(RECT) * nOldWorkAreas);
    }
    // for the mirrored case, the coordinates are reversed. IsRectEmpty() will always succeed
    if (nWorkAreas == 0 || prc == NULL || ((IsRectEmpty(prc)) && !(plv->ci.dwExStyle & RTL_MIRRORED_WINDOW)))
        plv->nWorkAreas = 0;
    else
    {
        plv->nWorkAreas = min(nWorkAreas, LV_MAX_WORKAREAS);

        if (plv->prcWorkAreas == NULL)
            plv->prcWorkAreas = (LPRECT)LocalAlloc(LPTR, sizeof(RECT) * LV_MAX_WORKAREAS);

        if (plv->prcWorkAreas == NULL)
            return;

        //Should we check if they intersect? This problem is sort of
        // solved (or made more confusing) by ListView_GetFreeSlot since it checks all of the icons for
        // intersection instead of just the ones in the workarea.
        for (iWork = 0; iWork < plv->nWorkAreas; iWork++)
            CopyRect(&plv->prcWorkAreas[iWork], &prc[iWork]);
    }

    // We don't support workareas for owner-data because our icon placement
    // algorithm (ListView_IGetRectsOwnerData) completely ignores workareas
    // and just dumps the icons in a rectangular array starting at (0,0).
    if (!ListView_IsOwnerData(plv) &&
        plv->nWorkAreas > 0 &&
        ((plv->nWorkAreas  != nOldWorkAreas) ||
         (!EqualRects(&plv->prcWorkAreas[0], &rcOldWorkAreas[0], nOldWorkAreas))))
    {
        int iItem;
        LISTITEM * pitem;

        //
        //  Subtle - ListView_Recompute cleans up all the RECOMPUTE icons,
        //  but in order to do that, it needs to have valid work area
        //  rectangles. So the call must happen after the CopyRect but before
        //  the loop that checks the icon positions.
        //
        ListView_Recompute(plv);

        for (iItem = 0; iItem < ListView_Count(plv); iItem++)
        {
            pitem = ListView_FastGetItemPtr(plv, iItem);

            if (pitem->pt.x == RECOMPUTE || pitem->pt.y == RECOMPUTE)
            {
                // ListView_Recompute should've fixed these if we were in
                // an iconical view.
                ASSERT(!(ListView_IsIconView(plv) || ListView_IsSmallView(plv)));
                continue;
            }

            // Try to move me to the same location relative to the same workarea.
            // This will give the cool shift effect when tools bars take the border areas.
            // And we only want to do this for the workareas that changed

            // Don't bully the icons on the workareas, Autoarrange will do the work for us

            if (nOldWorkAreas > 0)
            {
                int iOldWorkArea;
                iOldWorkArea = pitem->iWorkArea;
                if (iOldWorkArea >= plv->nWorkAreas)
                {
                    // My workarea is gone, put me on the primary workarea i.e. #0
                    pitem->iWorkArea = 0;
                    if (!bAutoArrange)
                    {
                        // If this item point location is already in the new primary workarea,
                        // move it out, and let ListView_BullyIconsOnWorkarea arrange it to the
                        // right place. NOTE: this could happen in the case the old secondary monitor
                        // is to the left of the old primary monitor, and user kills the secondary monitor
                        if (PtInRect(&plv->prcWorkAreas[0], pitem->pt))
                        {
                            pitem->pt.x = plv->prcWorkAreas[0].right + 1;
                            plv->iFreeSlot = -1; // an item moved -- old slot info is invalid
                        }
                        goto  InsertLostItemsArray;
                    }
                }
                else if ((!bAutoArrange) && (!EqualRect(&plv->prcWorkAreas[iOldWorkArea], &rcOldWorkAreas[iOldWorkArea])))
                {
                    RECT rcBound = {0};
                    POINT ptCenter;
                    pitem->pt.x += plv->prcWorkAreas[iOldWorkArea].left - rcOldWorkAreas[iOldWorkArea].left;
                    pitem->pt.y += plv->prcWorkAreas[iOldWorkArea].top - rcOldWorkAreas[iOldWorkArea].top;

                    // Use the center of this icon to determine whether it's out of bound
                    ListView_GetRects(plv, iItem, QUERY_DEFAULT, NULL, NULL, &rcBound, NULL);
                    ptCenter.x = pitem->pt.x + RECTWIDTH(rcBound) / 2;
                    ptCenter.y = pitem->pt.y + RECTHEIGHT(rcBound) / 2;

                    // If this shifted me out of bounds, register to be bullied on the workarea
                    if (!PtInRect(&plv->prcWorkAreas[iOldWorkArea], ptCenter))
                    {
InsertLostItemsArray:
                        if (!hdpaLostItems)
                        {
                            hdpaLostItems = DPA_Create(4);
                        }

                        if (hdpaLostItems)
                            DPA_InsertPtr(hdpaLostItems, DPA_LAST, IntToPtr(iItem));
                    }
                }

            }
            else
            {
                // My first time in a multi-workarea system, so find out my workarea
                if (!ListView_FindWorkArea(plv, pitem->pt, &(pitem->iWorkArea)) && !bAutoArrange)
                    goto InsertLostItemsArray;
            }

            if ((plv->exStyle & LVS_EX_REGIONAL) && (pitem->hrgnIcon))
            {
                if (pitem->hrgnIcon != (HANDLE)-1)
                    DeleteObject(pitem->hrgnIcon);
                pitem->hrgnIcon = NULL;
            }
        }

        if (hdpaLostItems)
        {
            ASSERT(!bAutoArrange);
            if (DPA_GetPtrCount(hdpaLostItems) > 0)
                ListView_BullyIconsOnWorkarea(plv, hdpaLostItems);

            DPA_Destroy(hdpaLostItems);
        }

        if (plv->exStyle & LVS_EX_REGIONAL)
            ListView_RecalcRegion(plv, TRUE, TRUE);

        if (ListView_IsSmallView(plv) || ListView_IsIconView(plv))
            ListView_ArrangeOrSnapToGrid(plv);
    }

    RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
}

void ListView_OnGetNumberOfWorkAreas(LV* plv, int * pnWorkAreas)
{
    if (pnWorkAreas)
        *pnWorkAreas = plv->nWorkAreas;
}

void ListView_OnGetWorkAreas(LV* plv, int nWorkAreas, LPRECT prc)
{
    if (prc != NULL)
    {
        int i;

        for (i = 0; i < min(plv->nWorkAreas, nWorkAreas); i++)
        {
            if (i < plv->nWorkAreas)
            {
                CopyRect(&prc[i], &plv->prcWorkAreas[i]);
            }
            else
            {
                // Set the workareas to all zeros if we don't have it.
                ZeroMemory(&prc[i], sizeof(RECT));
            }
        }
    }
}

// test an item to see if it is unfolded (because it is focused)

BOOL ListView_IsItemUnfolded(LV *plv, int item)
{
    return plv && (item >= 0) && ListView_IsIconView(plv) &&
           (plv->flags & LVF_UNFOLDED) && (plv->iFocus == item);
}

BOOL ListView_IsItemUnfoldedPtr(LV *plv, LISTITEM *pitem)
{
    return plv && pitem && ListView_IsIconView(plv) &&
           (plv->flags & LVF_UNFOLDED) && (pitem->state & LVIS_FOCUSED);
}

// Returns TRUE if unfolding the item will be worthwhile
BOOL ListView_GetUnfoldedRect(LV* plv, int iItem, RECT *prc)
{
    ListView_GetRects(plv, iItem, QUERY_DEFAULT, NULL, prc, NULL, NULL);
    return ListView_UnfoldRects(plv, iItem, NULL, prc, NULL, NULL);
}

BOOL ListView_OnSetGroupInfoInternal(LV* plv, PLVGROUP plvgrp, LISTGROUP* pgrp)
{
    if (plvgrp == NULL ||
        plvgrp->cbSize < sizeof(LVGROUP))
    {
        return FALSE;
    }

    if (plvgrp->mask & LVGF_STATE)
    {
        if ((plvgrp->state & LVGS_MASK) != plvgrp->state)
            return FALSE;

        pgrp->state = plvgrp->state;
    }

    if (plvgrp->mask & LVGF_ALIGN)
    {
        if ((plvgrp->uAlign & LVGA_ALIGN_MASK) != plvgrp->uAlign)
            return FALSE;

        pgrp->uAlign = plvgrp->uAlign;
    }
    else
    {
        pgrp->uAlign = LVGA_HEADER_LEFT;

    }

    if (ListView_VerifyGroupIdIsUnique(plv, plvgrp->iGroupId))
    {
        pgrp->iGroupId = plvgrp->iGroupId;
    }
    else
    {
        return FALSE;
    }

    if (plvgrp->mask & LVGF_HEADER)
    {
        Str_SetPtr(&pgrp->pszHeader, plvgrp->pszHeader);
    }

    if (plvgrp->mask & LVGF_FOOTER)
    {
        Str_SetPtr(&pgrp->pszFooter, plvgrp->pszFooter);
    }

    // Update the group.
    InvalidateRect(plv->ci.hwnd, &pgrp->rc, TRUE);

    return TRUE;
}

int ListView_OnSetGroupInfo(LV* plv, int iGroupId, PLVGROUP plvgrp)
{
    LISTGROUP* pgrp = ListView_FindGroupFromID(plv, iGroupId, NULL);
    if (pgrp)
    {
        ListView_OnSetGroupInfoInternal(plv, plvgrp, pgrp);
        return iGroupId;
    }

    return -1;
}

int ListView_OnGetGroupInfo(LV* plv, int iGroupId, PLVGROUP plvgrp)
{
    LISTGROUP* pgrp = ListView_FindGroupFromID(plv, iGroupId, NULL);

    if (plvgrp != NULL &&
        plvgrp->cbSize >= sizeof(LVGROUP) &&
        pgrp)
    {
        if (plvgrp->mask & LVGF_HEADER)
        {
            plvgrp->pszHeader = pgrp->pszHeader;
        }

        if (plvgrp->mask & LVGF_FOOTER)
        {
            plvgrp->pszFooter = pgrp->pszFooter;
        }

        if (plvgrp->mask & LVGF_STATE)
        {
            plvgrp->state = pgrp->state & plvgrp->stateMask;
        }

        if (plvgrp->mask & LVGF_ALIGN)
        {
            plvgrp->uAlign = pgrp->uAlign;
        }

        if (plvgrp->mask & LVGF_GROUPID)
        {
            plvgrp->iGroupId = pgrp->iGroupId;
        }

        return iGroupId;
    }
    return -1;
}

LISTGROUP* ListView_CreateGroup(LV* plv, PLVGROUP plvgrp)
{
    LISTGROUP* pgrp;
    
    // Validate Group
    if (plvgrp == NULL ||
        plvgrp->cbSize < sizeof(LVGROUP))
    {
        return NULL;
    }

    if (!(plvgrp->mask & LVGF_GROUPID))
    {
        // Have to have a group id...
        return NULL;
    }

    pgrp = LocalAlloc(LPTR, sizeof(LISTGROUP));
    if (pgrp)
    {
        if (!ListView_OnSetGroupInfoInternal(plv, plvgrp, pgrp))
        {
            LocalFree(pgrp);
            return NULL;
        }

        pgrp->hdpa = DPA_Create(5);
        SetRect(&pgrp->rc, 0, 0, 0, 0);
    }
    return pgrp;
}

void ListView_FreeGroupItem(LISTGROUP* pgrp)
{
    DPA_Destroy(pgrp->hdpa);
    Str_SetPtr(&pgrp->pszFooter, NULL);
    Str_SetPtr(&pgrp->pszHeader, NULL);
    LocalFree(pgrp);
}

LISTGROUP* ListView_FindFirstVisibleGroup(LV* plv)
{
    LISTGROUP* pgrp = NULL;
    int iGroup;
    int cGroups = DPA_GetPtrCount(plv->hdpaGroups);

    // Find the first group with an item in it.
    for (iGroup = 0; iGroup < cGroups; iGroup++)
    {
        pgrp = DPA_FastGetPtr(plv->hdpaGroups, iGroup);
        if (DPA_GetPtrCount(pgrp->hdpa) > 0)
            break;
    }

    return pgrp;
}


LRESULT ListView_OnInsertGroup(LV* plv, int iGroup, PLVGROUP plvgrp)
{
    int iInsert = -1;
    LISTGROUP* pgrp = ListView_CreateGroup(plv, plvgrp);

    if (!pgrp)
    {
        return -1;
    }

    if (iGroup == -1)
    {
        iGroup = DA_LAST;
    }

    if (plv->hdpaGroups == NULL)
        plv->hdpaGroups = DPA_Create(4);

    if (plv->hdpaGroups)
        iInsert = DPA_InsertPtr(plv->hdpaGroups, iGroup, pgrp);

    if (iInsert == -1)
    {
        ListView_FreeGroupItem(pgrp);
    }

    plv->rcView.left = RECOMPUTE;
    InvalidateRect(plv->ci.hwnd, NULL, TRUE);

    return iInsert;
}


LRESULT ListView_OnRemoveGroup(LV* plv, int iGroupId)
{
    int iIndex;
    LISTGROUP* pgrp = ListView_FindGroupFromID(plv, iGroupId, &iIndex);
    if (pgrp)
    {
        int cItems = DPA_GetPtrCount(pgrp->hdpa);
        int iItem;
        for (iItem = 0; iItem < cItems; iItem++)
        {
            LISTITEM* pitem = DPA_FastGetPtr(pgrp->hdpa, iItem);
            if (pitem)
            {
                LISTITEM_SETHASNOTASKEDFORGROUP(pitem);
            }
        }

        ListView_FreeGroupItem(pgrp);

        DPA_DeletePtr(plv->hdpaGroups, iIndex);
        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);

        return iIndex;
    }

    return -1;
}

int CALLBACK DestroyGroups(void* pv, void* pvData)
{
    LISTGROUP* pgrp = (LISTGROUP*)pv;
    ListView_FreeGroupItem(pgrp);
    return 1;
}

LRESULT ListView_OnRemoveAllGroups(LV* plv)
{
    if (!ListView_IsOwnerData(plv) && plv->hdpaGroups)
    {
        int i;
        int cItems = ListView_Count(plv);

        plv->fGroupView = FALSE;

        for (i = 0; i < cItems; i++)
        {
            LISTITEM* pitem = DPA_FastGetPtr(plv->hdpa, i);
            if (pitem)
                LISTITEM_SETHASNOTASKEDFORGROUP(pitem);
        }


        DPA_DestroyCallback(plv->hdpaGroups, DestroyGroups, NULL);
        plv->hdpaGroups = NULL;

        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    return 1;
}


LRESULT ListView_OnSetGroupMetrics(LV* plv, PLVGROUPMETRICS pgm)
{
    BOOL fRecompute = FALSE;

    if (pgm->mask & LVGMF_BORDERSIZE)
    {
        plv->rcBorder.left = pgm->Left;
        plv->rcBorder.top = pgm->Top;
        plv->rcBorder.right = pgm->Right;
        plv->rcBorder.bottom = pgm->Bottom;
        fRecompute = TRUE;
    }

    if (pgm->mask & LVGMF_BORDERCOLOR)
    {
        plv->crTop = pgm->crTop;
        plv->crLeft = pgm->crLeft;
        plv->crRight = pgm->crRight;
        plv->crBottom = pgm->crBottom;
    }

    if (pgm->mask & LVGMF_TEXTCOLOR)
    {
        plv->crHeader = pgm->crHeader;
        plv->crFooter = pgm->crFooter;
    }

    if (fRecompute)
    {
        plv->rcView.left = RECOMPUTE;
        ListView_Recompute(plv);
        ListView_UpdateScrollBars(plv);
    }
    InvalidateRect(plv->ci.hwnd, NULL, TRUE);

    return 1;
}

LRESULT ListView_OnGetGroupMetrics(LV* plv, PLVGROUPMETRICS pgm)
{
    if (pgm->mask & LVGMF_BORDERSIZE)
    {
        pgm->Left = plv->rcBorder.left;
        pgm->Top = plv->rcBorder.top;
        pgm->Right = plv->rcBorder.right;
        pgm->Bottom = plv->rcBorder.bottom;
    }

    if (pgm->mask & LVGMF_BORDERCOLOR)
    {
        pgm->crTop = plv->crTop;
        pgm->crLeft = plv->crLeft;
        pgm->crRight = plv->crRight;
        pgm->crBottom = plv->crBottom;
    }

    if (pgm->mask & LVGMF_TEXTCOLOR)
    {
        pgm->crHeader = plv->crHeader;
        pgm->crFooter= plv->crFooter;
    }

    return 1;
}

typedef struct
{
    PFNLVGROUPCOMPARE pfnCompare;
    void * pvData;
} SORTGROUPDATA;

int CALLBACK pfnGroupSort(LPARAM one, LPARAM two, LPARAM pvData)
{
    SORTGROUPDATA* psg  = (SORTGROUPDATA*)pvData;
    LISTGROUP* pgrp1 = (LISTGROUP*)one;
    LISTGROUP* pgrp2 = (LISTGROUP*)two;

    if (!one)
        return 1;

    if (!two)
        return -1;

    return psg->pfnCompare(pgrp1->iGroupId, pgrp2->iGroupId, psg->pvData);
}

LRESULT ListView_OnSortGroups(LV* plv, PFNLVGROUPCOMPARE pfnCompare, void * pvData)
{
    if (plv->hdpaGroups)
    {
        SORTGROUPDATA sg;
        sg.pfnCompare = pfnCompare;
        sg.pvData = pvData;
        DPA_Sort(plv->hdpaGroups, (PFNDPACOMPARE)pfnGroupSort, (LPARAM)&sg);

        plv->rcView.left = RECOMPUTE;
        ListView_Recompute(plv);
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        ListView_UpdateScrollBars(plv);

        return 1;
    }

    return 0;
}

LRESULT ListView_OnInsertGroupSorted(LV* plv, LVINSERTGROUPSORTED* pinsert)
{
    int iInsertIndex = -1;
    SORTGROUPDATA sg;
    LISTGROUP* pgrp = ListView_CreateGroup(plv, &pinsert->lvGroup);

    sg.pfnCompare = pinsert->pfnGroupCompare;
    sg.pvData = pinsert->pvData;

    if (pgrp)
    {
        if (plv->hdpaGroups == NULL)
            plv->hdpaGroups = DPA_Create(4);

        if (plv->hdpaGroups)
        {
            iInsertIndex = DPA_SortedInsertPtr(plv->hdpaGroups, pgrp, 0, (PFNDPACOMPARE)pfnGroupSort, 
                (LPARAM)&sg, DPAS_INSERTAFTER, pgrp);
        }
        if (iInsertIndex == -1)
            ListView_FreeGroupItem(pgrp);

        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    return iInsertIndex;
}

BOOL ListView_OnSetTileViewInfo(LV* plv, PLVTILEVIEWINFO pTileViewInfo)
{
    BOOL bRecompute = FALSE;
    if (!pTileViewInfo || (pTileViewInfo->cbSize != sizeof(LVTILEVIEWINFO)))
        return FALSE;

    if (pTileViewInfo->dwMask & LVTVIM_COLUMNS)
    {
        if (plv->cSubItems != pTileViewInfo->cLines)
        {
            bRecompute = TRUE;
            plv->cSubItems = pTileViewInfo->cLines;
        }
    }

    if (pTileViewInfo->dwMask & LVTVIM_TILESIZE)
    {
        DWORD dwTileFlags = pTileViewInfo->dwFlags & (LVTVIF_FIXEDHEIGHT | LVTVIF_FIXEDWIDTH);

        if (plv->dwTileFlags != dwTileFlags)
        {
            plv->dwTileFlags = dwTileFlags;
            bRecompute = TRUE;
        }

        if (ListView_IsDPIScaled(plv))
        {
            CCDPIScaleX(&pTileViewInfo->sizeTile.cx);
            CCDPIScaleY(&pTileViewInfo->sizeTile.cy);
        }


        if ((plv->dwTileFlags & LVTVIF_FIXEDHEIGHT) &&
            plv->sizeTile.cy != pTileViewInfo->sizeTile.cy)
        {
            plv->sizeTile.cy = pTileViewInfo->sizeTile.cy;
            bRecompute = TRUE;
        }

        if ((plv->dwTileFlags & LVTVIF_FIXEDWIDTH) &&
            plv->sizeTile.cx != pTileViewInfo->sizeTile.cx)
        {
            plv->sizeTile.cx = pTileViewInfo->sizeTile.cx;
            bRecompute = TRUE;
        }

    }

    if ((pTileViewInfo->dwMask & LVTVIM_LABELMARGIN) &&
        !EqualRect(&plv->rcTileLabelMargin, &pTileViewInfo->rcLabelMargin))
    {
        plv->rcTileLabelMargin = pTileViewInfo->rcLabelMargin;
        bRecompute = TRUE;
    }

    if (bRecompute)
    {
        ListView_RecalcTileSize(plv);
        plv->rcView.left = RECOMPUTE;
        ListView_Recompute(plv);
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }
    return TRUE;
}

BOOL ListView_OnGetTileViewInfo(LV* plv, PLVTILEVIEWINFO pTileViewInfo)
{
    if (!pTileViewInfo || (pTileViewInfo->cbSize != sizeof(LVTILEVIEWINFO)))
        return FALSE;

    if (pTileViewInfo->dwMask & LVTVIM_COLUMNS)
    {
        pTileViewInfo->cLines = plv->cSubItems;
    }

    if (pTileViewInfo->dwMask & LVTVIM_TILESIZE)
    {
        pTileViewInfo->dwFlags = plv->dwTileFlags;
        pTileViewInfo->sizeTile = plv->sizeTile;
    }

    if (pTileViewInfo->dwMask & LVTVIM_LABELMARGIN)
    {
        pTileViewInfo->rcLabelMargin = plv->rcTileLabelMargin;
    }

    return TRUE;
}

BOOL ListView_OnSetTileInfo(LV* plv, PLVTILEINFO pTileInfo)
{
    LVITEM lvi;

    if (!pTileInfo || (pTileInfo->cbSize != sizeof(LVTILEINFO)))
        return FALSE;

    lvi.mask = LVIF_COLUMNS;
    lvi.cColumns = pTileInfo->cColumns;
    lvi.puColumns = pTileInfo->puColumns;
    lvi.iSubItem = 0;
    lvi.iItem = pTileInfo->iItem;

    return ListView_OnSetItem(plv, &lvi);
}

BOOL ListView_OnGetTileInfo(LV* plv, PLVTILEINFO pTileInfo)
{
    LVITEM lvi;

    if (!pTileInfo || (pTileInfo->cbSize != sizeof(LVTILEINFO)))
        return FALSE;

    lvi.mask = LVIF_COLUMNS;
    lvi.iSubItem = 0;
    lvi.iItem = pTileInfo->iItem;
    lvi.cColumns = pTileInfo->cColumns;
    lvi.puColumns = pTileInfo->puColumns;

    if (ListView_OnGetItem(plv, &lvi))
    {
        pTileInfo->cColumns = lvi.cColumns;
        return TRUE;
    }
    return FALSE;
}

LRESULT ListView_OnSetInsertMark(LV* plv, LPLVINSERTMARK plvim)
{
    if (plvim->cbSize != sizeof(LVINSERTMARK))
        return 0;

    if (plvim->iItem != plv->iInsertItem ||
        BOOLIFY(plv->fInsertAfter) != BOOLIFY(plvim->dwFlags & LVIM_AFTER))
    {
        if (plv->iInsertItem != -1)
            ListView_InvalidateMark(plv);

        plv->iInsertItem = plvim->iItem;
        plv->fInsertAfter = BOOLIFY(plvim->dwFlags & LVIM_AFTER);

        if (plv->iInsertItem != -1)
            ListView_InvalidateMark(plv);
    }

    return 1;
}

LRESULT ListView_OnSetInfoTip(LV *plv, PLVSETINFOTIP plvSetInfoTip)
{
    LPWSTR pszText = NULL;
    LPWSTR pszProduced = NULL;
    LRESULT lRet = 0;

    // Check size and flags. MBZ for now.
    if (plvSetInfoTip->cbSize == sizeof(LVSETINFOTIP) && 
        plvSetInfoTip->dwFlags == 0 &&
        plvSetInfoTip->pszText != NULL)
    {
        pszText = plvSetInfoTip->pszText;

        // If we are still looking at the same item, then set its text, and pop up the tip.
        if (plvSetInfoTip->iItem == plv->iTTLastHit && plvSetInfoTip->iSubItem == plv->iTTLastSubHit)
        {
            TCHAR szBuf[INFOTIPSIZE];
            BOOL bItemUnfolded;
            BOOL fInfoTip = FALSE;
            szBuf[0] = 0;

            // preload the default tip text for folded items.
            bItemUnfolded = ListView_IsItemUnfolded2(plv, plv->iTTLastHit, plv->iTTLastSubHit, szBuf, ARRAYSIZE(szBuf));

            if (ListView_IsInfoTip(plv) && plv->iTTLastSubHit == 0)
            {
                if (*pszText && lstrcmp(szBuf, pszText) != 0)
                {
                    // App changed something - there is a real infotip
                    fInfoTip = TRUE;
                }
            }
            else
            {
                pszText = szBuf;
            }
        
            //
            // Set the margins now before the TTN_SHOW because it will be too late then.
            //
            // We want fat margins if we're an infotip, thin margins if we're an
            // in-place tooltip.
            //
            if (fInfoTip)
            {
                static const RECT rcMargin = {4, 4, 4, 4};
                SendMessage(plv->hwndToolTips, TTM_SETMARGIN, 0, (LPARAM)&rcMargin);
                CCSetInfoTipWidth(plv->ci.hwnd, plv->hwndToolTips);
                plv->fPlaceTooltip = FALSE;     // Set it to TRUE only if Unfolding tip is set

            }
            else
            {
                static const RECT rcMargin = {0, 0, 0, 0};
                plv->fPlaceTooltip = TRUE;
                SendMessage(plv->hwndToolTips, TTM_SETMARGIN, 0, (LPARAM)&rcMargin);
                CCResetInfoTipWidth(plv->ci.hwnd, plv->hwndToolTips);
            }

            Str_Set(&plv->pszTip, pszText);

            // Re-display tooltip. If tracking, call tracking start code (same as timer code)
            if (!ListView_IsKbdTipTracking(plv))
                lRet = SendMessage(plv->hwndToolTips, TTM_POPUP, 0, 0);
            else
                ListView_OnTimer(plv, IDT_TRACKINGTIP);
        }

        if (pszProduced)
            FreeProducedString(pszProduced);
    }
    return lRet;
}

LRESULT ListView_OnNotify(LV* plv, WPARAM wParam, LPNMHDR pnmh)
{
    // we can't switch on the control ID because the tooltip is a WS_POPUP window
    // and does not have a control ID. (header and tooltip both have 0 as ID)

    if (plv->hwndHdr && (plv->hwndHdr == pnmh->hwndFrom))
    {
        // this is a notify for the header, deal with it as needed

        return ListView_HeaderNotify(plv, (HD_NOTIFY *)pnmh);
    }
    else if (plv->hwndToolTips && (plv->hwndToolTips == pnmh->hwndFrom))
    {
        // implement unfolding the text for items as well as info tip support

        switch (pnmh->code)
        {
        case TTN_NEEDTEXT:
        {
            POINT pt;
            UINT uFlags;
            int iNewHit;
            int iNewSubHit;
            NMTTDISPINFO *pttt = (NMTTDISPINFO *)pnmh;

            // If keyboard tracking, do not hit test based on last cursor position
            if (ListView_IsKbdTipTracking(plv))
            {
                RECT rcItem;
                ListView_GetItemRect(plv->ci.hwnd, plv->iTracking, &rcItem, LVIR_LABEL);

                pt.x = rcItem.left;
                pt.y = rcItem.top;
            }
            else
                GetMessagePosClient(plv->ci.hwnd, &pt);

            iNewHit = _ListView_ItemHitTest(plv, pt.x, pt.y, &uFlags, &iNewSubHit);

            if (iNewHit != plv->iTTLastHit || iNewSubHit != plv->iTTLastSubHit)
            {
                plv->fPlaceTooltip = FALSE;     // Set it to TRUE only if Unfolding tip is set
                Str_Set(&plv->pszTip, NULL);    // clear the old tip

                plv->iTTLastHit = iNewHit;
                plv->iTTLastSubHit = iNewSubHit;

                if ((iNewHit >= 0) && (plv->iEdit == -1))
                {
                    TCHAR szBuf[INFOTIPSIZE], szBuf2[INFOTIPSIZE];
                    BOOL bItemUnfolded;
                    BOOL fInfoTip = FALSE;
                    LPTSTR pszTip = szBuf;  // Use this one first

                    szBuf[0] = 0;
                    szBuf2[0] = 0;

                    // preload the tip text for folded items. this
                    // may be overridden by callback below
                    bItemUnfolded = ListView_IsItemUnfolded2(plv, plv->iTTLastHit, plv->iTTLastSubHit, szBuf, ARRAYSIZE(szBuf));

                    // Backup the unfolding text
                    StringCchCopy(szBuf2, ARRAYSIZE(szBuf2), szBuf);

                    if (ListView_IsInfoTip(plv) && iNewSubHit == 0)
                    {
                        NMLVGETINFOTIP git;

                        git.dwFlags = bItemUnfolded ? LVGIT_UNFOLDED : 0;
                        git.pszText = szBuf;
                        git.cchTextMax = ARRAYSIZE(szBuf);
                        git.iItem = plv->iTTLastHit;
                        git.iSubItem = 0;
                        git.lParam = 0;

                        // for folded items pszText is prepopulated with the
                        // item text, clients should append to this

                        CCSendNotify(&plv->ci, LVN_GETINFOTIP, &git.hdr);

                        if (*szBuf && lstrcmp(szBuf, szBuf2) != 0)
                        {
                            // App changed something - there is a real infotip
                            fInfoTip = TRUE;
                        }

                    }
                    
                    //
                    // Set the margins now before the TTN_SHOW because it will be too late then.
                    //
                    // We want fat margins if we're an infotip, thin margins if we're an
                    // in-place tooltip.
                    //
                    if (fInfoTip)
                    {
                        static const RECT rcMargin = {4, 4, 4, 4};
                        SendMessage(plv->hwndToolTips, TTM_SETMARGIN, 0, (LPARAM)&rcMargin);
                        CCSetInfoTipWidth(plv->ci.hwnd, plv->hwndToolTips);

                    }
                    else
                    {
                        static const RECT rcMargin = {0, 0, 0, 0};
                        plv->fPlaceTooltip = TRUE;
                        SendMessage(plv->hwndToolTips, TTM_SETMARGIN, 0, (LPARAM)&rcMargin);
                        CCResetInfoTipWidth(plv->ci.hwnd, plv->hwndToolTips);
                    }

                    Str_Set(&plv->pszTip, pszTip);
                }
            }

            pttt->lpszText = plv->pszTip;     // here it is...
        }
        break;

        // Handle custom draw as we want the tooltip painted as a multi-line that
        // matches the formatting used by the list view.

        case NM_CUSTOMDRAW:
        {
            LPNMTTCUSTOMDRAW pnm = (LPNMTTCUSTOMDRAW) pnmh;

            if (plv->fPlaceTooltip &&
                (pnm->nmcd.dwDrawStage == CDDS_PREPAINT ||
                 pnm->nmcd.dwDrawStage == CDDS_ITEMPREPAINT))
            {
                DWORD dwCustom = 0;

                //
                //  Set up the customdraw DC to match the font of the LV item.
                //
                if (plv->iTTLastHit != -1)
                {
                    LVFAKEDRAW lvfd;
                    LV_ITEM item;
                    ListView_BeginFakeCustomDraw(plv, &lvfd, &item);

                    item.iItem = plv->iTTLastHit;
                    item.iSubItem = plv->iTTLastSubHit;
                    item.mask = LVIF_PARAM;
                    ListView_OnGetItem(plv, &item);
                    dwCustom = ListView_BeginFakeItemDraw(&lvfd);

                    // If client changed the font, then transfer the font
                    // from our private hdc into the tooltip's HDC.  We use
                    // a private HDC because we only want to let the app change
                    // the font, not the colors or anything else.
                    if (dwCustom & CDRF_NEWFONT)
                    {
                        SelectObject(pnm->nmcd.hdc, GetCurrentObject(lvfd.nmcd.nmcd.hdc, OBJ_FONT));
                    }
                    ListView_EndFakeItemDraw(&lvfd);
                    ListView_EndFakeCustomDraw(&lvfd);

                }

                //
                //  The Large Icon tooltip needs to be drawn specially.
                //
                if (ListView_IsIconView(plv))
                {
                    pnm->uDrawFlags &= ~(DT_SINGLELINE|DT_LEFT);
                    pnm->uDrawFlags |= DT_CENTER|DT_LVWRAP;

                    if (pnm->uDrawFlags & DT_CALCRECT)
                    {
                        pnm->nmcd.rc.right = pnm->nmcd.rc.left + (plv->cxIconSpacing - g_cxLabelMargin * 2);
                        pnm->nmcd.rc.bottom = pnm->nmcd.rc.top + 0x10000;           // big number, no limit!
                    }
                }

                // Don't return other wacky flags to TT, since all we
                // did was change the font (if even that)
                return dwCustom & CDRF_NEWFONT;
            }
        }
        break;

        case TTN_SHOW:
            if (plv->iTTLastHit != -1)
            {
                if (plv->fPlaceTooltip)
                {
                    LPNMTTSHOWINFO psi = (LPNMTTSHOWINFO)pnmh;
                    RECT rcLabel;

                    // In case we're doing subitem hit-testing
                    rcLabel.top = plv->iTTLastSubHit;
                    rcLabel.left = LVIR_LABEL;

                    // reposition to allign with the text rect and
                    // set it to topmost
                    if (plv->iTTLastSubHit && ListView_OnGetSubItemRect(plv, plv->iTTLastHit, &rcLabel)) 
                    {
                        LV_ITEM item;

                        // we got the subitem rect. When we draw subitems, we give
                        // them SHDT_EXTRAMARGIN, so we have to also
                        rcLabel.left += g_cxLabelMargin * 3;
                        rcLabel.right -= g_cxLabelMargin * 3;

                        // And take the image into account, too.
                        // ListView_OnGetItem will worry about LVS_EX_SUBITEMIMAGES.
                        item.mask = LVIF_IMAGE;
                        item.iImage = -1;
                        item.iItem = plv->iTTLastHit;
                        item.iSubItem = plv->iTTLastSubHit;
                        ListView_OnGetItem(plv, &item);
                        if (item.iImage != -1)
                            rcLabel.left += plv->cxSmIcon;
                    } 
                    else
                    {                    // a tip from subitem zero
                        ListView_GetUnfoldedRect(plv, plv->iTTLastHit, &rcLabel);
                        // SHDrawText actually leaves a g_cxLabelMargin margin
                        rcLabel.left += g_cxLabelMargin;
                        rcLabel.right -= g_cxLabelMargin;
                    }

                    // In report and list views, SHDrawText does vertical
                    // centering (without consulting the custom-draw client,
                    // even, so it just centers by a random amount).
                    if (ListView_IsListView(plv) || ListView_IsReportView(plv))
                    {
                        rcLabel.top += (rcLabel.bottom - rcLabel.top - plv->cyLabelChar) / 2;
                    }

                    SendMessage(plv->hwndToolTips, TTM_ADJUSTRECT, TRUE, (LPARAM)&rcLabel);
                    MapWindowRect(plv->ci.hwnd, HWND_DESKTOP, &rcLabel);

                    if (!ListView_IsIconView(plv))
                    {
                        // In non-large-icon view, the label size may be greater than the rect returned by ListView_GetUnfoldedRect.
                        // So don't specify the size
                        SetWindowPos(plv->hwndToolTips, HWND_TOP,
                                 rcLabel.left, rcLabel.top,
                                 0, 0, SWP_NOSIZE | SWP_NOACTIVATE | SWP_HIDEWINDOW);
                    }
                    else
                    {
                        SetWindowPos(plv->hwndToolTips, HWND_TOP,
                                 rcLabel.left, rcLabel.top,
                                 (rcLabel.right - rcLabel.left), (rcLabel.bottom - rcLabel.top),
                                 SWP_NOACTIVATE | SWP_HIDEWINDOW);
                    }
                    // This is an inplace tooltip, so disable animation.
                    psi->dwStyle |= TTS_NOANIMATE;
                    return TRUE;
                }
                else if (ListView_IsKbdTipTracking(plv))  // Size tip when keyboard tracking
                {
                    RECT rc;
                    RECT rcTT;
                    RECT rcItem;
                    POINT ptTT;
                    POINT ptItem;

                    MONITORINFO mi = {0};
                    mi.cbSize = sizeof(MONITORINFO);

                    // Establish item screen position and size
                    ListView_GetItemRect(plv->ci.hwnd, plv->iTracking, &rcItem, LVIR_ICON);
                    ListView_GetItemRect(plv->ci.hwnd, plv->iTracking, &rc, LVIR_BOUNDS);
                    rcItem.top = rc.top;
                    rcItem.bottom = rc.bottom;
                    ptItem.x = rcItem.left;
                    ptItem.y = rcItem.top;
                    ClientToScreen(plv->ci.hwnd, &ptItem);

                    // Get tip rect
                    GetWindowRect(plv->hwndToolTips, &rcTT);

                    // Init tooltip position
                    ptTT.x = ptItem.x + RECTWIDTH(rcItem);
                    ptTT.y = ptItem.y + RECTHEIGHT(rcItem);

                    // Get screen info where tooltip is being displayed
                    GetMonitorInfo(MonitorFromPoint(ptTT, MONITOR_DEFAULTTONEAREST), &mi);

                    // Update tooltip position if it runs off the screen
                    if ((ptTT.x + RECTWIDTH(rcTT)) > mi.rcMonitor.right)
                        ptTT.x = (ptItem.x + g_cxIconMargin) - RECTWIDTH(rcTT);

                    if ((ptTT.y + RECTHEIGHT(rcTT)) > mi.rcMonitor.bottom)
                        ptTT.y = ptItem.y - RECTHEIGHT(rcTT);

                    SetWindowPos(plv->hwndToolTips, NULL, ptTT.x, ptTT.y, 0, 0, SWP_NOSIZE|SWP_NOACTIVATE);

                    return TRUE;
                }
            }
            break;

        }
    }

    return 0;
}

// Pass the focus to the given window, and then check to see if it exists.
// Passing focus can cause the window to be destroyed (by the Explorer
// when renaming).

BOOL ListView_SetFocus(HWND hwnd)
{
    SetFocus(hwnd);
    return IsWindow(hwnd);
}

void ListView_Realize(LV* plv, HDC hdcParam, BOOL fBackground, BOOL fForceRepaint)
{
    if (plv->hpalHalftone)
    {
        HDC hdc = hdcParam ? hdcParam : GetDC(plv->ci.hwnd);

        if (hdc)
        {
            BOOL fRepaint;

            SelectPalette(hdc, plv->hpalHalftone, fBackground);
            fRepaint = RealizePalette(hdc) || fForceRepaint;

            if (!hdcParam)
                ReleaseDC(plv->ci.hwnd, hdc);

            if (fRepaint)
            {
                InvalidateRect(plv->ci.hwnd, NULL, TRUE);
            }
        }
    }
}

BOOL RectInRect(const RECT* prcOuter, const RECT* prcInner)
{
    RECT rcDummy;
    return IntersectRect(&rcDummy, prcOuter, prcInner);
}


LRESULT LVGenerateDragImage(LV* plv, SHDRAGIMAGE* pshdi)
{
    LRESULT lRet = 0;
    int iNumSelected = plv->nSelected;
    int iIndex;
    int iSelectedItem;
    RECT rc = {0, 0, 0, 0};
    RECT rcVisRect;
    HBITMAP hbmpOld = NULL;
    HDC  hdcDragImage;
    BOOL fBorderSelect = (plv->exStyle & LVS_EX_BORDERSELECT);

    // First loop through can get the selection rect
    if (ListView_IsOwnerData(plv)) 
    {
        plv->plvrangeSel->lpVtbl->CountIncluded(plv->plvrangeSel, &iNumSelected);
    }

    if (iNumSelected == 0)
        return FALSE;

    plv->flags |= LVF_DRAGIMAGE;

    GetClientRect(plv->ci.hwnd, &rcVisRect);


    // Loop Through and calculate the enclosing rect.
    for (iIndex = iNumSelected - 1, iSelectedItem = -1; iIndex >= 0; iIndex--)
    {
        iSelectedItem = ListView_OnGetNextItem(plv, iSelectedItem, LVNI_SELECTED);
        if (iSelectedItem != -1)
        {
            RECT rcItemBounds;

            // Make sure this is in the visible region
            if (ListView_GetItemRect(plv->ci.hwnd, iSelectedItem, &rcItemBounds, LVIR_SELECTBOUNDS) &&
                RectInRect(&rcVisRect, &rcItemBounds))
            {
                UnionRect(&rc, &rc, &rcItemBounds);
            }
        }
    }

    hdcDragImage = CreateCompatibleDC(NULL);

    if (hdcDragImage)
    {
        RGBQUAD* prgbBits;
        BITMAPINFO bi;

        // Need to turn this off because it doesn't look good.
        plv->exStyle &= ~LVS_EX_BORDERSELECT;

        // After this rc contains the bounds of all the items in Client Coordinates.
        //
        // Mirror the the DC, if the listview is mirrored.
        //
        if (plv->ci.dwExStyle & RTL_MIRRORED_WINDOW)
        {
            SET_DC_RTL_MIRRORED(hdcDragImage);
        }

    #define MAX_DRAG_RECT_WIDTH 300
    #define MAX_DRAG_RECT_HEIGHT 300
        // If this rect is too big, fix it.
        if (RECTWIDTH(rc) > MAX_DRAG_RECT_WIDTH)
        {
            int iLeft = MAX_DRAG_RECT_WIDTH / 2;
            int iRight = MAX_DRAG_RECT_WIDTH /2;

            int iRectOriginalLeft = rc.left;
            // Is the left boundry outside the visible rect?
            if (rc.left < plv->ptCapture.x - iLeft)
            {
                // Yes, then we have to clip it.
                rc.left = plv->ptCapture.x - iLeft;
            }
            else
            {
                // No? Well then shift the visible rect to the right, so that we have
                // more room.
                iRight += rc.left - (plv->ptCapture.x - iLeft);
            }

            // Is the right boundry outside the visible rect?
            if (rc.right > plv->ptCapture.x + iRight)
            {
                // Yes, then we have to clip it.
                rc.right = plv->ptCapture.x + iRight;
            }
            else
            {
                // No? Then try and add it to the left
                if (rc.left > iRectOriginalLeft)
                {
                    rc.left -= iRight - (rc.right - plv->ptCapture.x);
                    if (rc.left < iRectOriginalLeft)
                        rc.left = iRectOriginalLeft;
                }
            }
        }

        if (RECTHEIGHT(rc) > MAX_DRAG_RECT_HEIGHT)
        {
            // same for top and bottom:
            // Is the top boundry outside the visible rect?
            int iTop = MAX_DRAG_RECT_HEIGHT / 2;
            int iBottom = MAX_DRAG_RECT_HEIGHT /2;
            int iRectOriginalTop = rc.top;
            if (rc.top < plv->ptCapture.y - iTop)
            {
                // Yes, then we have to clip it.
                rc.top = plv->ptCapture.y - iTop;
            }
            else
            {
                // No? Well then shift the visible rect to the right, so that we have
                // more room.
                iBottom += rc.top - (plv->ptCapture.y - iTop);
            }

            // Is the right boundry outside the visible rect?
            if (rc.bottom > plv->ptCapture.y + iBottom)
            {
                // Yes, then we have to clip it.
                rc.bottom = plv->ptCapture.y + iBottom;
            }
            else
            {
                // No? Then try and add it to the top
                if (rc.top > iRectOriginalTop)
                {
                    rc.top -= iBottom - (rc.bottom - plv->ptCapture.y);
                    if (rc.top < iRectOriginalTop)
                        rc.top = iRectOriginalTop;
                }
            }
        }

        pshdi->sizeDragImage.cx = RECTWIDTH(rc) + 1;
        pshdi->sizeDragImage.cy = RECTHEIGHT(rc) + 1;
        bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
        bi.bmiHeader.biWidth = pshdi->sizeDragImage.cx;
        bi.bmiHeader.biHeight = pshdi->sizeDragImage.cy;
        bi.bmiHeader.biPlanes = 1;
        bi.bmiHeader.biBitCount = 32;
        bi.bmiHeader.biCompression = BI_RGB;
        pshdi->hbmpDragImage = CreateDIBSection(hdcDragImage, &bi, DIB_RGB_COLORS, &prgbBits, NULL, 0);

        if (pshdi->hbmpDragImage)
        {
            int iTotal = bi.bmiHeader.biWidth * bi.bmiHeader.biHeight;
            LVDRAWITEM lvdi;
            int cItem;

            RECT  rcImage = {0, 0, pshdi->sizeDragImage.cx, pshdi->sizeDragImage.cy};
            hbmpOld = SelectObject(hdcDragImage, pshdi->hbmpDragImage);

            ZeroMemory(prgbBits, pshdi->sizeDragImage.cx * pshdi->sizeDragImage.cy);
            pshdi->crColorKey = CLR_NONE;


            // Calculate the offset... The cursor should be in the bitmap rect.

            if (plv->ci.dwExStyle & RTL_MIRRORED_WINDOW)
                pshdi->ptOffset.x = rc.right - plv->ptCapture.x;
            else
                pshdi->ptOffset.x = plv->ptCapture.x - rc.left;
            pshdi->ptOffset.y = plv->ptCapture.y - rc.top;

            lvdi.prcClip = NULL;
            lvdi.plv = plv;
            lvdi.nmcd.nmcd.hdc = hdcDragImage;
            lvdi.pitem = NULL;
            cItem = ListView_Count(plv);

            // Now loop through again for the paint cycle
            for (iIndex = cItem - 1, iSelectedItem = -1; iIndex >= 0; iIndex--)
            {
                if (ListView_IsOwnerData(plv)) 
                {
                    iSelectedItem++;
                    plv->plvrangeSel->lpVtbl->NextSelected(plv->plvrangeSel, iSelectedItem, &iSelectedItem);
                }
                else
                {
                    LISTITEM* pitem;
                    iSelectedItem = (int)(UINT_PTR)DPA_FastGetPtr(plv->hdpaZOrder, iIndex);
                    pitem = ListView_FastGetItemPtr(plv, iSelectedItem);
                    if (!(pitem->state & LVIS_SELECTED))
                        iSelectedItem = -1;
                }

                if (iSelectedItem != -1)
                {
                    int     iOldItemDrawing;
                    COLORREF crSave;
                    POINT ptOrigin = {-rc.left, -rc.top};     //Offset the rects by...
                    RECT  rcItemBounds;
                    RECT rcTemp;

                    iOldItemDrawing = plv->iItemDrawing;
                    plv->iItemDrawing = iSelectedItem;
                    lvdi.nmcd.nmcd.dwItemSpec = iSelectedItem;
                    ListView_GetRects(plv, iSelectedItem, QUERY_DEFAULT, NULL, NULL, &rcItemBounds, NULL);

                    // Make sure this is in the visible region
                    if (IntersectRect(&rcTemp, &rcVisRect, &rcItemBounds))
                    {
                        ptOrigin.x += rcItemBounds.left;
                        ptOrigin.y += rcItemBounds.top;
                        // these may get changed
                        lvdi.lpptOrg = &ptOrigin;
                        lvdi.flags = LVDI_NOEFFECTS;
                        lvdi.nmcd.clrText = plv->clrText;
                        lvdi.nmcd.clrTextBk = plv->clrTextBk;
                        lvdi.nmcd.clrFace = plv->clrBk;
                        lvdi.nmcd.iIconEffect = ILD_NORMAL;
                        lvdi.nmcd.iIconPhase = 0;

                        // Save the Background color!
                        crSave = plv->clrBk;
                        plv->clrBk = CLR_NONE;  // None so that it "bleeds" into the alpha channel

                        ListView_DrawItem(&lvdi);

                        plv->clrBk = crSave;
                    }
                    plv->iItemDrawing = iOldItemDrawing;
                }
            }


            for (iIndex = 0; iIndex < iTotal; iIndex++)
            {
                RGBQUAD* prgb = &prgbBits[iIndex];
                if (prgb->rgbReserved == 0 && 
                    (prgb->rgbRed || prgb->rgbGreen || prgb->rgbBlue))    // Do we have color an no alpha?
                {
                    prgb->rgbReserved = 0xFF;
                }
            }

            SelectObject(hdcDragImage, hbmpOld);
            DeleteDC(hdcDragImage);

            // We're passing back the created HBMP.
            lRet = 1;
        }

        if (fBorderSelect)
            plv->exStyle |= LVS_EX_BORDERSELECT;
    }

    plv->flags &= ~LVF_DRAGIMAGE;


    return lRet;
}


LRESULT ListView_OnEnableGroupView(LV* plv, BOOL fEnable)
{
    if (plv->ci.style & LVS_OWNERDATA)  // Not supported in ownerdata case.
        return -1;

    if (fEnable ^ plv->fGroupView)
    {
        if (fEnable)
        {
            // Turning on groupview, so nuke insertmark, because that's not allowed
            // in group view
            LVINSERTMARK lvim = {0};
            lvim.cbSize = sizeof(LVINSERTMARK);
            lvim.iItem = -1;
            ListView_OnSetInsertMark(plv, &lvim);
        }

        plv->fGroupView = fEnable;

        if (fEnable)
        {
            if (plv->hdpaGroups == NULL)
                plv->hdpaGroups = DPA_Create(4);

            if (plv->hdpaGroups == NULL)
                return -1;
        }

        plv->rcView.left = RECOMPUTE;
        SetWindowLongPtr(plv->ci.hwnd, GWL_STYLE, GetWindowLongPtr(plv->ci.hwnd, GWL_STYLE) | LVS_AUTOARRANGE);
        _ListView_RecomputeEx(plv, NULL, 0, TRUE);
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        ListView_UpdateScrollBars(plv);

        return 1;
    }

    return 0;
}


LRESULT ListView_SetViewType(LV* plv, WORD wView)
{
    if (wView > LV_VIEW_MAX)
        return -1;
    else if (plv->wView != wView)
    {
        int i;
        WORD wViewOld = plv->wView;

        ListView_DismissEdit(plv, FALSE);

        // (dli) Setting the small icon width here and only in the case when we go
        // from large icon view to some other view because of three reasons:
        // 1. According to chee, we want to set this before we change the style bit in
        // plv or after we scale.
        // 2. We don't want to do it after we scale because we want to set the width to
        // the maximum value so that the items in this listview do not cover each other
        // 3. we do it from large icon view because large icon view has fixed width for
        // each item, small icon view width can be scaled.

        if (wViewOld == LV_VIEW_ICON)
            ListView_ISetColumnWidth(plv, 0, LV_GetNewColWidth(plv, 0, ListView_Count(plv)-1), FALSE);

        if (wView == LV_VIEW_TILE)
        {
            ListView_RecalcTileSize(plv);
        }

        plv->wView = wView;

        ListView_TypeChange(plv, wViewOld, BOOLIFY(plv->ci.style & LVS_OWNERDRAWFIXED));

        // Else we would like to make the most important item to still
        // be visible.  So first we will look for a cursorered item
        // if this fails, we will look for the first selected item,
        // else we will simply ask for the first item (assuming the
        // count > 0
        //
        // And make sure the scrollbars are up to date Note this
        // also updates some variables that some views need
        ListView_UpdateScrollBars(plv);

        i = (plv->iFocus >= 0) ? plv->iFocus : ListView_OnGetNextItem(plv, -1, LVNI_SELECTED);
        if ((i == -1) && (ListView_Count(plv) > 0))
            i = 0;

        if (i != -1)
            ListView_OnEnsureVisible(plv, i, TRUE);

        RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);

        // Change of styles also changes tooltip policy, so pop it
        ListView_PopBubble(plv);
    }
    return 1;
}

BOOL    ListView_OnGetFrozenSlot(LV* plv, LPRECT pSlotRect)
{
    int cSlots, iWidth = 0, iHeight = 0;
    LISTITEM *pItem;
    
    if((plv->iFrozenSlot == LV_NOFROZENSLOT) || !ListView_IsIconView(plv) || ListView_IsOwnerData(plv) || (pSlotRect == NULL)) //Supported only in Large Icon mode!
        return FALSE;
        
    cSlots = ListView_GetSlotCount(plv, TRUE, &iWidth, &iHeight);

    //We need to have a valid pItem to pass to ListView_CalcSlotRect() function.
    pItem = plv->pFrozenItem;   //Try to use a frozen item, if present.
    if(pItem == NULL)
        pItem = ListView_GetItemPtr(plv, 0); //Or else, use the first item.
        
    if(pItem == NULL)   //If we couldn't get any pItem, then we can't call CalcSlotRect().
        return FALSE;   //... Hence, we have to return failure.
    else
    {
        ListView_CalcSlotRect(plv, pItem, plv->iFrozenSlot, cSlots, FALSE,
                                      iWidth, iHeight,pSlotRect);
        return TRUE;
    }
}

BOOL    ListView_OnSetFrozenSlot(LV* plv, BOOL fFreeze, LPPOINT    pPt)
{
    if(!ListView_IsIconView(plv) || ListView_IsOwnerData(plv)) //Supported only in Large Icon mode!
        return FALSE;
        
    if(fFreeze)
    {
        //First, find the slot where the given point lies.
        int cSlots, iWidth = 0, iHeight = 0;
        cSlots = ListView_GetSlotCount(plv, TRUE, &iWidth, &iHeight);
        plv->iFrozenSlot = ListView_CalcHitSlot(plv, *pPt, cSlots, iWidth, iHeight);
    }
    else
    {
        //Unfreeze a frozen slot.
        plv->iFrozenSlot = LV_NOFROZENSLOT; //No slot is frozen.
    }

    return TRUE;
}

int     ListView_OnGetFrozenItem(LV* plv)
{
    int i;
    LISTITEM *pItem;
    
    if((plv->pFrozenItem == NULL) || !ListView_IsIconView(plv) || ListView_IsOwnerData(plv)) //Supported only in Large Icon mode!
        return LV_NOFROZENITEM;

    for(i = 0; i < ListView_Count(plv); i++)
    {
        pItem = ListView_GetItemPtr(plv, i);
        if((pItem != NULL) && (pItem == plv->pFrozenItem))
            return (i);
    }

    return  LV_NOFROZENITEM;
}

BOOL    ListView_OnSetFrozenItem(LV* plv, BOOL fFreeze, int iIndex)
{
    LISTITEM *pitem;
    
    if(!ListView_IsIconView(plv) || ListView_IsOwnerData(plv)) //Supported only in Large Icon mode!
        return FALSE;

    if(fFreeze)
    {
        //Freeze the given item.
        pitem = ListView_GetItemPtr(plv, iIndex);

        if(pitem == NULL)
            return FALSE;

        plv->pFrozenItem = pitem;
    }
    else
    {
        //Unfreeze the currently frozen item.
        plv->pFrozenItem = NULL;
    }

    return TRUE;
}

// Item focus changed via the keyboard, start tracking tooltip timeout for keyboard nav popups
//
BOOL ListView_OnKeyboardSelected(LV* plv, int iNewFocus)
{
    if (iNewFocus >= 0 && plv->hwndToolTips)
    {
        // Focus via the keyboard (already cancelled via entry into this function)
        plv->iTracking = iNewFocus;

        // Delay will be replaced with an SPI
        SetTimer(plv->ci.hwnd, IDT_TRACKINGTIP, GetDoubleClickTime() * 2, NULL);
    }
    return TRUE;
}

LRESULT ListView_OnMapIndexToID(LV* plv, UINT iItem)
{
    LISTITEM* pitem;
    if (!ListView_IsValidItemNumber(plv, iItem) || ListView_IsOwnerData(plv))
    {
        return -1;
    }

    pitem = ListView_FastGetItemPtr(plv, iItem);

    ASSERT (pitem);

    return (LRESULT)pitem->dwId;
}

#ifdef DEBUG
UINT uAverageSeekCount = 0;
UINT uTotalSeeks = 0;
UINT uPerSeekCount = 0;
#endif
LRESULT ListView_OnMapIdToIndex(LV* plv, UINT Id)
{
    DWORD dwRet = -1;
    UINT cCounter = 0;
    UINT cItems = ListView_Count(plv);
    UINT i;
    
    if (ListView_IsOwnerData(plv))
        return -1;

    if (plv->iLastId >= cItems)
        plv->iLastId = 0;

    DEBUG_CODE(uTotalSeeks++);

   
    for (i = plv->iLastId; cCounter < cItems; cCounter++) 
    {
        LISTITEM* pitem = ListView_FastGetItemPtr(plv, i);
        if (pitem->dwId == Id)
        {
            if (plv->iLastId > i)
                plv->iIncrement = -1;
            else
                plv->iIncrement = 1;

            plv->iLastId = dwRet = i;
            break;
        }

        DEBUG_CODE(uPerSeekCount++);

        i += (DWORD)plv->iIncrement;

        if (i == -1)        // Wrapped around to "Less than zero"?
            i = cItems - 1;
        if (i >= cItems)
            i = 0;
    }

    DEBUG_CODE(uAverageSeekCount = uPerSeekCount / uTotalSeeks);

    return (LRESULT)dwRet;
}

void ListView_OnSize(LV* plv)
{
    if (plv->hwndToolTips)
    {
        TOOLINFO ti;

        if (ListView_IsLabelTip(plv))
        {
            // A truncated label may have been exposed or vice versa.
            ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);
        }

        ti.cbSize = sizeof(ti);
        ti.hwnd = plv->ci.hwnd;
        ti.uId = 0;

        // Resize the tooltip control so that it covers the entire
        // area of the window when its parent gets resized.
        GetClientRect(plv->ci.hwnd, &ti.rect);
        SendMessage(plv->hwndToolTips, TTM_NEWTOOLRECT, 0, (LPARAM) &ti);
    }

    // if we're supposed to center the image,
    // we need to do a full redraw on each size
    if ((plv->ulBkImageFlags & LVBKIF_SOURCE_MASK) &&
        (plv->ulBkImageFlags & LVBKIF_STYLE_MASK) == LVBKIF_STYLE_NORMAL &&
        (plv->xOffsetPercent || plv->yOffsetPercent))
    {
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }
}

BOOL ListView_OnSetViewMargins(LV* plv, RECT *prc)
{
    if (!IsEqualRect(plv->rcViewMargin, *prc))
    {
        plv->rcViewMargin = *prc;
        plv->rcView.left = RECOMPUTE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }
    return TRUE;
}

BOOL ListView_OnGetViewMargins(LV* plv, RECT *prc)
{
    *prc = plv->rcViewMargin;
    return TRUE;
}

LRESULT CALLBACK ListView_WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    LV* plv = ListView_GetPtr(hwnd);

    if (plv == NULL)
    {
        if (uMsg == WM_NCCREATE)
        {
            plv = (LV*)LocalAlloc(LPTR, sizeof(LV));
            if (!plv)
            {
                TraceMsg(TF_ERROR, "ListView: Out of memory");
                return 0L;      // fail the window create
            }

            plv->ci.hwnd = hwnd;
            plv->flags = LVF_REDRAW;    // assume that redrawing enabled!
            plv->iFocus = -1;           // no focus
            plv->iMark = -1;
            plv->iSelCol = -1;
            plv->iDropHilite = -1;      // Assume no item has drop hilite...
            plv->cyItem = plv->cyItemSave = 1; // never let these be zero, not even for a moment
            plv->hTheme = OpenThemeData(hwnd, L"ListView");
            plv->iInsertItem = -1;          // No insert mark by default of course
            plv->clrim = CLR_DEFAULT;
            plv->iTracking = LVKTT_NOTRACK;
            plv->hheap = GetProcessHeap();
            plv->iFrozenSlot = LV_NOFROZENSLOT; //No slot is frozen to begin with!
            plv->iIncrement = -1;
            ListView_SetPtr(hwnd, plv);
        }
        goto DoDefault;
    }

    if ((uMsg >= WM_MOUSEFIRST) && (uMsg <= WM_MOUSELAST)) 
    {
        if (plv->exStyle & (LVS_EX_TRACKSELECT|LVS_EX_ONECLICKACTIVATE|LVS_EX_TWOCLICKACTIVATE)) 
        {
            TRACKMOUSEEVENT tme;

            tme.cbSize = sizeof(tme);
            tme.hwndTrack = plv->ci.hwnd;
            tme.dwHoverTime = plv->dwHoverTime;
            tme.dwFlags = TME_LEAVE | TME_HOVER | TME_QUERY;

            // see what's set
            TrackMouseEvent(&tme);
            tme.dwFlags &= TME_HOVER | TME_LEAVE;

            // set these bits if they aren't already set
            tme.dwFlags ^= TME_LEAVE;
            if (plv->exStyle & LVS_EX_TRACKSELECT)
            {
                tme.dwFlags ^= TME_HOVER;
            }

            tme.cbSize = sizeof(tme);
            tme.hwndTrack = plv->ci.hwnd;
            tme.dwHoverTime = plv->dwHoverTime;
            // set it if there's anything to set
            if (tme.dwFlags & (TME_HOVER | TME_LEAVE)) 
            {
                TrackMouseEvent(&tme);
            }
        }
    }

    if (uMsg == g_uDragImages)
    {
        return LVGenerateDragImage(plv, (SHDRAGIMAGE*)lParam);
    }

    switch (uMsg)
    {
        HANDLE_MSG(plv, WM_CREATE, ListView_OnCreate);
        HANDLE_MSG(plv, WM_DESTROY, ListView_OnDestroy);
        HANDLE_MSG(plv, WM_ERASEBKGND, ListView_OnEraseBkgnd);
        HANDLE_MSG(plv, WM_COMMAND, ListView_OnCommand);
        HANDLE_MSG(plv, WM_SETFOCUS, ListView_OnSetFocus);
        HANDLE_MSG(plv, WM_KILLFOCUS, ListView_OnKillFocus);

        HANDLE_MSG(plv, WM_HSCROLL, ListView_OnHScroll);
        HANDLE_MSG(plv, WM_VSCROLL, ListView_OnVScroll);
        HANDLE_MSG(plv, WM_GETDLGCODE, ListView_OnGetDlgCode);
        HANDLE_MSG(plv, WM_SETFONT, ListView_OnSetFont);
        HANDLE_MSG(plv, WM_GETFONT, ListView_OnGetFont);
        HANDLE_MSG(plv, WM_TIMER, ListView_OnTimer);
        HANDLE_MSG(plv, WM_SETREDRAW, ListView_OnSetRedraw);
        HANDLE_MSG(plv, WM_NCDESTROY, ListView_OnNCDestroy);

    case WM_SETCURSOR:
        if (ListView_OnSetCursorMsg(plv))
            return TRUE;
        break;

    case WM_PALETTECHANGED:
        if ((HWND)wParam == hwnd)
            break;
    case WM_QUERYNEWPALETTE:
        // Want to pass FALSE if WM_QUERYNEWPALETTE...
        ListView_Realize(plv, NULL, uMsg == WM_PALETTECHANGED, uMsg == WM_PALETTECHANGED);
        return TRUE;

    case LVMP_WINDOWPOSCHANGED:
    case WM_WINDOWPOSCHANGED:
        HANDLE_WM_WINDOWPOSCHANGED(plv, wParam, lParam, ListView_OnWindowPosChanged);
        break;

    case WM_WINDOWPOSCHANGING:
        {
            WINDOWPOS* wp = (WINDOWPOS*)lParam;
            if ((wp->flags & SWP_SHOWWINDOW)||
                (wp->flags & SWP_HIDEWINDOW))
            {
                BOOL fShow = (wp->flags & SWP_SHOWWINDOW);
                LV_OnShowWindow(plv, fShow);
            }

            if (ListView_IsWatermarked(plv))
            {
                RECT rc = {wp->x, wp->y, wp->x + wp->cx, wp->y + wp->y};
                // Invalidate New.
                rc.left = rc.right - plv->szWatermark.cx;
                rc.top = rc.bottom - plv->szWatermark.cy;
                InvalidateRect(plv->ci.hwnd, &rc, TRUE);

                // and Old:
                GetClientRect(plv->ci.hwnd, &rc);
                rc.left = rc.right - plv->szWatermark.cx;
                rc.top = rc.bottom - plv->szWatermark.cy;
                InvalidateRect(plv->ci.hwnd, &rc, TRUE);
            }
        }
        break;

    case WM_MBUTTONDOWN:
        if (ListView_SetFocus(hwnd) && plv->hwndToolTips)
            RelayToToolTips(plv->hwndToolTips, hwnd, uMsg, wParam, lParam);
        break;

    case WM_LBUTTONDBLCLK:
    case WM_RBUTTONDBLCLK:
        // Cancel manual tip track on any mouse button down
        ListView_CancelTipTrack(plv);
        if (plv->hwndToolTips)
            RelayToToolTips(plv->hwndToolTips, hwnd, uMsg, wParam, lParam);
        ListView_OnButtonDown(plv, TRUE, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), (UINT) wParam);
        break;

    case WM_LBUTTONDOWN:
    case WM_RBUTTONDOWN:
        // Cancel manual tip track on any mouse button down
        ListView_CancelTipTrack(plv);
        if (plv->hwndToolTips)
            RelayToToolTips(plv->hwndToolTips, hwnd, uMsg, wParam, lParam);
        ListView_OnButtonDown(plv, FALSE, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), (UINT) wParam);
        break;

    case WM_LBUTTONUP:
    case WM_RBUTTONUP:
    case WM_MBUTTONUP:
    case WM_NCMOUSEMOVE:
        if (plv->hwndToolTips)
            RelayToToolTips(plv->hwndToolTips, hwnd, uMsg, wParam, lParam);
        break;

    case WM_PRINTCLIENT:
    case WM_PAINT:
        ListView_OnPaint(plv, (HDC)wParam);
        return 0;

    case WM_NCPAINT:
        {
            if (plv->hTheme && plv->ci.dwExStyle & WS_EX_CLIENTEDGE)
            {
                HRGN hrgn = (wParam != 1) ? (HRGN)wParam : NULL;

                if (CCDrawNonClientTheme(plv->hTheme, hwnd, hrgn, plv->hbrBk, 0, 0))
                {
                    return 1;
                }
            }
        }
        break;

    case WM_SHOWWINDOW:
        LV_OnShowWindow(plv, BOOLFROMPTR(wParam));
        break;

    case WM_MOUSEHOVER:
        ListView_OnMouseHover(plv, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), (UINT) wParam);
        break;

    case WM_MOUSELEAVE:
        ListView_OnSetHotItem(plv, -1);
        plv->iNoHover = -1;

        break;

    case WM_KEYUP:
        plv->iScrollCount = 0;
        break;

    case WM_KEYDOWN:
        HANDLE_WM_KEYDOWN(plv, wParam, lParam, ListView_OnKey);
        break;

    case WM_IME_COMPOSITION:
        // Now only Korean version is interested in incremental search with composition string.
        if (g_fDBCSInputEnabled)
        {
            if (((ULONG_PTR)GetKeyboardLayout(0L) & 0xF000FFFFL) == 0xE0000412L)
            {
                if (ListView_OnImeComposition(plv, wParam, lParam))
                {
                    lParam &= ~GCS_RESULTSTR;
                    break;
                }
                else
                    return 0;
            }
        }
        break;

    case WM_CHAR:
        if (plv->iPuntChar) 
        {
            plv->iPuntChar--;
            return TRUE;
        } 
        else 
        {
            return HANDLE_WM_CHAR(plv, wParam, lParam, ListView_OnChar);
        }

    case WM_WININICHANGE:
        ListView_OnWinIniChange(plv, wParam, lParam);
        break;

    case WM_NOTIFYFORMAT:
        return CIHandleNotifyFormat(&plv->ci, lParam);

    case WM_ENABLE:
        // HACK: we don't get WM_STYLECHANGE on EnableWindow()
        ListView_EnableWindow(plv, BOOLFROMPTR(wParam));
        break;

    case WM_SYSCOLORCHANGE:
        InitGlobalColors();
        if (plv->ci.style & WS_DISABLED)
        {
            if (!(plv->flags & LVF_USERBKCLR))
                plv->clrBkSave = g_clrWindow;
            ListView_OnSetBkColor(plv, g_clrBtnFace);
        }
        else if (!(plv->flags & LVF_USERBKCLR))
        {
            ListView_OnSetBkColor(plv, g_clrWindow);
        }

        if (plv->exStyle & LVS_EX_CHECKBOXES)
        {
            ListView_InitCheckBoxes(plv, FALSE);
        }

        plv->crHeader = GetSysColor(COLOR_WINDOWTEXT);
        plv->crTop = GetSysColor(COLOR_BTNFACE);
        plv->crLeft = GetSysColor(COLOR_BTNFACE);

//  98/11/19 #249967 vtan: Always invalidate the list view
//  rectangle so that the color change causes a refresh.

        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        break;

        // don't use HANDLE_MSG because this needs to go to the default handler
    case WM_SYSKEYDOWN:
        HANDLE_WM_SYSKEYDOWN(plv, wParam, lParam, ListView_OnKey);
        break;

    case WM_UPDATEUISTATE:
    {
        DWORD dwUIStateMask = MAKEWPARAM(0xFFFF, UISF_HIDEFOCUS);

        // we care only about focus not accel, and redraw only if changed
        if (CCOnUIState(&(plv->ci), WM_UPDATEUISTATE, wParam & dwUIStateMask, lParam))
        {
            if (plv->iFocus >= 0)
            {
                // an item has the focus, invalidate it
                ListView_InvalidateItem(plv, plv->iFocus, FALSE, RDW_INVALIDATE | RDW_ERASE);
            }
        }

        goto DoDefault;
    }

    case LVM_GETITEMA:
        return (LRESULT)ListView_OnGetItemA(plv, (LV_ITEMA *)lParam);

    case LVM_SETITEMA:
        return (LRESULT)ListView_OnSetItemA(plv, (LV_ITEMA *)lParam);

    case LVM_INSERTITEMA:
        return (LRESULT)ListView_OnInsertItemA(plv, (LV_ITEMA *)lParam);

    case LVM_FINDITEMA:
        return (LRESULT)ListView_OnFindItemA(plv, (int)wParam, (LV_FINDINFOA *)lParam);

    case LVM_GETSTRINGWIDTHA:
        return (LRESULT)ListView_OnGetStringWidthA(plv, (LPCSTR)lParam, NULL);

    case LVM_GETCOLUMNA:
        return (LRESULT)ListView_OnGetColumnA(plv, (int)wParam, (LV_COLUMNA *)lParam);

    case LVM_SETCOLUMNA:
        return (LRESULT)ListView_OnSetColumnA(plv, (int)wParam, (LV_COLUMNA *)lParam);

    case LVM_INSERTCOLUMNA:
        return (LRESULT)ListView_OnInsertColumnA(plv, (int)wParam, (LV_COLUMNA *)lParam);

    case LVM_GETITEMTEXTA:
        return (LRESULT)ListView_OnGetItemTextA(plv, (int)wParam, (LV_ITEMA *)lParam);

    case LVM_SETITEMTEXTA:
        if (!lParam)
            return FALSE;

        return (LRESULT)ListView_OnSetItemTextA(plv, (int)wParam,
                                                ((LV_ITEMA *)lParam)->iSubItem,
                                                (LPCSTR)((LV_ITEMA *)lParam)->pszText);

    case LVM_GETBKIMAGEA:
        return (LRESULT)ListView_OnGetBkImageA(plv, (LPLVBKIMAGEA)lParam);

    case LVM_SETBKIMAGEA:
        return (LRESULT)ListView_OnSetBkImageA(plv, (LPLVBKIMAGEA)lParam);

    case WM_STYLECHANGING:
        ListView_OnStyleChanging(plv, (UINT)wParam, (LPSTYLESTRUCT)lParam);
        return 0;

    case WM_STYLECHANGED:
        ListView_OnStyleChanged(plv, (UINT) wParam, (LPSTYLESTRUCT)lParam);
        return 0L;

    case WM_HELP:
        return ListView_OnHelp(plv, (LPHELPINFO)lParam);


    case LVM_GETIMAGELIST:
        return (LRESULT)(UINT_PTR)(ListView_OnGetImageList(plv, (int)wParam));

    case LVM_SETIMAGELIST:
        return (LRESULT)(UINT_PTR)ListView_OnSetImageList(plv, (HIMAGELIST)lParam, (int)wParam);

    case LVM_GETBKCOLOR:
        return (LRESULT)(plv->ci.style & WS_DISABLED ? plv->clrBkSave : plv->clrBk);

    case LVM_SETBKCOLOR:
        plv->flags |= LVF_USERBKCLR;
        if (plv->ci.style & WS_DISABLED) 
        {
            plv->clrBkSave = (COLORREF)lParam;
            return TRUE;
        } 
        else 
        {
            return (LRESULT)ListView_OnSetBkColor(plv, (COLORREF)lParam);
        }

    case LVM_GETTEXTCOLOR:
        return (LRESULT)plv->clrText;
    case LVM_SETTEXTCOLOR:
        plv->clrText = (COLORREF)lParam;
        return TRUE;
    case LVM_GETTEXTBKCOLOR:
        return (LRESULT)plv->clrTextBk;
    case LVM_SETTEXTBKCOLOR:
        plv->clrTextBk = (COLORREF)lParam;
        return TRUE;
    case LVM_GETHOTLIGHTCOLOR:
        return (LRESULT)plv->clrHotlight;
    case LVM_SETHOTLIGHTCOLOR:
        plv->clrHotlight = (COLORREF)lParam;
        return TRUE;

    case LVM_GETITEMCOUNT:
        if (ListView_IsOwnerData(plv))
            return (LRESULT)plv->cTotalItems;
        else if (!plv->hdpa)
            return 0;
        else
            return (LRESULT)DPA_GetPtrCount(plv->hdpa);
        break;

    case LVM_GETITEM:
        return (LRESULT)ListView_OnGetItem(plv, (LV_ITEM*)lParam);

    case LVM_GETITEMSTATE:
        return (LRESULT)ListView_OnGetItemState(plv, (int)wParam, (UINT)lParam);

    case LVM_SETITEMSTATE:
        if (!lParam)
            return FALSE;

        return (LRESULT)ListView_OnSetItemState(plv, (int)wParam,
                                                ((LV_ITEM *)lParam)->state,
                                                ((LV_ITEM *)lParam)->stateMask);

    case LVM_SETITEMTEXT:
        if (!lParam)
            return FALSE;

        return (LRESULT)ListView_OnSetItemText(plv, (int)wParam,
                                                ((LV_ITEM *)lParam)->iSubItem,
                                                (LPCTSTR)((LV_ITEM *)lParam)->pszText);

    case LVM_GETITEMTEXT:
        return (LRESULT)ListView_OnGetItemText(plv, (int)wParam, (LV_ITEM *)lParam);

    case LVM_GETBKIMAGE:
        return (LRESULT)ListView_OnGetBkImage(plv, (LPLVBKIMAGE)lParam);

    case LVM_SETBKIMAGE:
        return (LRESULT)ListView_OnSetBkImage(plv, (LPLVBKIMAGE)lParam);

    case LVM_GETSELECTEDCOLUMN:
        return plv->iLastColSort;

    case LVM_SETSELECTEDCOLUMN:
        plv->iLastColSort = (int) wParam;

        if (ListView_IsTileView(plv))
        {
            // Tileview displays the selected column on the second line, if available. The second
            // line might be blank w/o it. So when this changes, we need to recompute each tile.
            if (!ListView_IsOwnerData(plv))
            {
                int i;
                for (i = 0; i < ListView_Count(plv); i++)
                {
                    LISTITEM *pitem = ListView_FastGetItemPtr(plv, i);
                    ListView_SetSRecompute(pitem);
                }
            }

            plv->rcView.left = RECOMPUTE;
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        }

        return 1;

    case LVM_SETVIEW:
        return ListView_SetViewType(plv, (WORD)wParam);

    case LVM_GETVIEW:
        return plv->wView;

    case LVM_SETITEM:
        return (LRESULT)ListView_OnSetItem(plv, (const LV_ITEM*)lParam);

    case LVM_INSERTITEM:
        return (LRESULT)ListView_OnInsertItem(plv, (const LV_ITEM*)lParam);

    case LVM_DELETEITEM:
        return (LRESULT)ListView_OnDeleteItem(plv, (int)wParam);

    case LVM_UPDATE:
        ListView_OnUpdate(plv, (int)wParam);
        UpdateWindow(plv->ci.hwnd);
        return TRUE;

    case LVM_DELETEALLITEMS:
        lParam = (LRESULT)ListView_OnDeleteAllItems(plv);
        // Optimization:  Instead of sending out a zillion EVENT_OBJECT_DESTROY's,
        // we send out a destroy of ourselves followed by a fresh create.
        // For compatibility with IE4, we still send out the REORDER notification.
        NotifyWinEvent(EVENT_OBJECT_REORDER, hwnd, OBJID_CLIENT, 0);
        ListView_NotifyRecreate(plv);
        return lParam;

    case LVM_GETITEMRECT:
        return (LRESULT)ListView_OnGetItemRect(plv, (int)wParam, (RECT*)lParam);

    case LVM_GETSUBITEMRECT:
        return (LRESULT)ListView_OnGetSubItemRect(plv, (int)wParam, (LPRECT)lParam);

    case LVM_SUBITEMHITTEST:
        return (LRESULT)ListView_OnSubItemHitTest(plv, (LPLVHITTESTINFO)lParam);

    case LVM_GETISEARCHSTRINGA:
        if (GetFocus() == plv->ci.hwnd)
            return (LRESULT)GetIncrementSearchStringA(&plv->is, plv->ci.uiCodePage, (LPSTR)lParam);
        else
            return 0;

    case LVM_GETISEARCHSTRING:
        if (GetFocus() == plv->ci.hwnd)
            return (LRESULT)GetIncrementSearchString(&plv->is, (LPTSTR)lParam);
        else
            return 0;

    case LVM_GETITEMSPACING:
        if (wParam)
            return MAKELONG(plv->cxItem, plv->cyItem);
        else
            return MAKELONG(plv->cxIconSpacing, plv->cyIconSpacing);

    case LVM_GETNEXTITEM:
        return (LRESULT)ListView_OnGetNextItem(plv, (int)wParam, (UINT)lParam);

    case LVM_FINDITEM:
        return (LRESULT)ListView_OnFindItem(plv, (int)wParam, (const LV_FINDINFO*)lParam);

    case LVM_SETSELECTIONMARK:
    {
        int iOldMark = plv->iMark;
        int iNewMark = (int)lParam;
        if (iNewMark == -1 || ListView_IsValidItemNumber(plv, iNewMark))
        {
            plv->iMark = iNewMark;
        }
        return iOldMark;
    }

    case LVM_GETSELECTIONMARK:
        return plv->iMark;

    case LVM_GETITEMPOSITION:
        return (LRESULT)ListView_OnGetItemPosition(plv, (int)wParam,
                (POINT*)lParam);

    case LVM_SETITEMPOSITION:
        return (LRESULT)ListView_OnSetItemPosition(plv, (int)wParam,
                GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));

    case LVM_SETITEMPOSITION32:
        if (!lParam)
            return FALSE;

        return (LRESULT)ListView_OnSetItemPosition(plv, (int)wParam,
                ((LPPOINT)lParam)->x, ((LPPOINT)lParam)->y);

    case LVM_SCROLL:
    {
        int dx = (int)wParam;
        int dy = (int)lParam;
        return (LRESULT)(ListView_ValidateScrollParams(plv, &dx, &dy) &&
                         ListView_OnScroll(plv, dx, dy));
    }

    case LVM_ENSUREVISIBLE:
        return (LRESULT)ListView_OnEnsureVisible(plv, (int)wParam, BOOLFROMPTR(lParam));

    case LVM_REDRAWITEMS:
        return (LRESULT)ListView_OnRedrawItems(plv, (int)wParam, (int)lParam);

    case LVM_ARRANGE:
        return (LRESULT)ListView_OnArrange(plv, (UINT)wParam);

    case LVM_GETEDITCONTROL:
        return (LRESULT)(UINT_PTR)plv->hwndEdit;

    case LVM_EDITLABELA:
    {
        LPWSTR lpEditString = NULL;
        HWND   hRet;

        if (lParam) 
        {
            lpEditString = ProduceWFromA(plv->ci.uiCodePage, (LPSTR)lParam);
        }

        hRet = ListView_OnEditLabel(plv, (int)wParam, lpEditString);

        if (lpEditString) 
        {
            FreeProducedString(lpEditString);
        }

        return (LRESULT)hRet;
    }

    case LVM_EDITLABEL:
        return (LRESULT)(UINT_PTR)ListView_OnEditLabel(plv, (int)wParam, (LPTSTR)lParam);

    case LVM_HITTEST:
        return (LRESULT)ListView_OnHitTest(plv, (LV_HITTESTINFO*)lParam);

    case LVM_GETSTRINGWIDTH:
        return (LRESULT)ListView_OnGetStringWidth(plv, (LPCTSTR)lParam, NULL);

    case LVM_GETCOLUMN:
        return (LRESULT)ListView_OnGetColumn(plv, (int)wParam, (LV_COLUMN*)lParam);

    case LVM_SETCOLUMN:
        return (LRESULT)ListView_OnSetColumn(plv, (int)wParam, (const LV_COLUMN*)lParam);

    case LVM_SETCOLUMNORDERARRAY:
        return SendMessage(plv->hwndHdr, HDM_SETORDERARRAY, wParam, lParam);

    case LVM_GETCOLUMNORDERARRAY:
        return SendMessage(plv->hwndHdr, HDM_GETORDERARRAY, wParam, lParam);

    case LVM_GETHEADER:
    {
        HWND hwndOld = plv->hwndHdr;
        if (lParam && IsWindow((HWND)lParam))
        {
            plv->hwndHdr = (HWND)lParam;
        }
        return (LRESULT)hwndOld;
    }

    case LVM_INSERTCOLUMN:
        return (LRESULT)ListView_OnInsertColumn(plv, (int)wParam, (const LV_COLUMN*)lParam);

    case LVM_DELETECOLUMN:
        return (LRESULT)ListView_OnDeleteColumn(plv, (int)wParam);

    case LVM_CREATEDRAGIMAGE:
        return (LRESULT)(UINT_PTR)ListView_OnCreateDragImage(plv, (int)wParam, (LPPOINT)lParam);


    case LVMI_PLACEITEMS:
        if (plv->uUnplaced) 
        {
            ListView_Recompute(plv);
            ListView_UpdateScrollBars(plv);
        }
        return 0;

    case LVM_GETVIEWRECT:
        return (LPARAM)ListView_OnGetViewRect(plv, (RECT*)lParam);

    case LVM_GETCOLUMNWIDTH:
        return (LPARAM)ListView_OnGetColumnWidth(plv, (int)wParam);

    case LVM_SETCOLUMNWIDTH:
        return (LPARAM)ListView_ISetColumnWidth(plv, (int)wParam,
            GET_X_LPARAM(lParam), TRUE);

    case LVM_SETCALLBACKMASK:
        plv->stateCallbackMask = (UINT)wParam;
        return (LPARAM)TRUE;

    case LVM_GETCALLBACKMASK:
        return (LPARAM)(UINT)plv->stateCallbackMask;

    case LVM_GETTOPINDEX:
        return (LPARAM)ListView_OnGetTopIndex(plv);

    case LVM_GETCOUNTPERPAGE:
        return (LPARAM)ListView_OnGetCountPerPage(plv);

    case LVM_GETORIGIN:
        return (LPARAM)ListView_OnGetOrigin(plv, (POINT*)lParam);

    case LVM_SETITEMCOUNT:
        return ListView_OnSetItemCount(plv, (int)wParam, (DWORD)lParam);

    case LVM_GETSELECTEDCOUNT:
        if (ListView_IsOwnerData(plv)) 
        {
            plv->plvrangeSel->lpVtbl->CountIncluded(plv->plvrangeSel, &plv->nSelected);
        }

        return plv->nSelected;

    case LVM_SORTITEMS:
        return ListView_OnSortItems(plv, (LPARAM)wParam, (PFNLVCOMPARE)lParam, TRUE);

    case LVM_SORTITEMSEX:
        return ListView_OnSortItems(plv, (LPARAM)wParam, (PFNLVCOMPARE)lParam, FALSE);

    case LVM_SETEXTENDEDLISTVIEWSTYLE:
        return ListView_ExtendedStyleChange(plv, (DWORD) lParam, (DWORD) wParam);

    case LVM_GETEXTENDEDLISTVIEWSTYLE:
        return plv->exStyle;

    case LVM_GETHOVERTIME:
        return plv->dwHoverTime;

    case LVM_SETHOVERTIME:
    {
        DWORD dwRet = plv->dwHoverTime;
        plv->dwHoverTime = (DWORD)lParam;
        return dwRet;
    }

    case LVM_GETTOOLTIPS:
        return (LRESULT)plv->hwndToolTips;

    case LVM_SETTOOLTIPS:
    {
        HWND hwndToolTips = plv->hwndToolTips;
        plv->hwndToolTips = (HWND)wParam;
        return (LRESULT)hwndToolTips;
    }

    case LVM_SETICONSPACING:
    {
        DWORD dwRet = ListView_OnSetIconSpacing(plv, lParam);

        // rearrange as necessary
        if (ListView_RedrawEnabled(plv) &&
             (ListView_IsSmallView(plv) || ListView_IsIconView(plv)))
        {
            ListView_ArrangeOrSnapToGrid(plv);
        }
        return dwRet;
    }

    case LVM_SETHOTITEM:
    {
        int iOld = plv->iHot;
        int iNew = (int)wParam;
        if (iNew == -1 || ListView_IsValidItemNumber(plv, iNew)) 
        {
            ListView_OnSetHotItem(plv, (int)wParam);
        }
        return iOld;
    }

    case LVM_GETHOTITEM:
        return plv->iHot;

    // hCurHot is used iff LVS_EX_TRACKSELECT
    case LVM_SETHOTCURSOR:
    {
        HCURSOR hCurOld = plv->hCurHot;
        plv->hCurHot = (HCURSOR)lParam;
        return (LRESULT)hCurOld;
    }

    case LVM_GETHOTCURSOR:
        if (!plv->hCurHot)
        {
            plv->hCurHot = LoadCursor(NULL, IDC_HAND);
        }
        return (LRESULT)plv->hCurHot;

    case LVM_APPROXIMATEVIEWRECT:
        return ListView_OnApproximateViewRect(plv, (int)wParam, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));

    case LVM_SETLVRANGEOBJECT:
        return ListView_OnSetLVRangeObject(plv, (int)wParam, (ILVRange *)lParam);

    case LVM_SETWORKAREAS:
        ListView_OnSetWorkAreas(plv, (int)wParam, (RECT *)lParam);
        return 0;

    case LVM_GETWORKAREAS:
        ListView_OnGetWorkAreas(plv, (int)wParam, (RECT *)lParam);
        return 0;

    case LVM_GETNUMBEROFWORKAREAS:
        ListView_OnGetNumberOfWorkAreas(plv, (int *)lParam);
        return 0;

    case LVM_RESETEMPTYTEXT:
        plv->fNoEmptyText = FALSE;
        Str_Set(&plv->pszEmptyText, NULL);
        if (ListView_Count(plv) == 0)
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        return 1;

    case LVM_INSERTGROUPSORTED:
        return ListView_OnInsertGroupSorted(plv, (LVINSERTGROUPSORTED*) wParam);

    case LVM_SORTGROUPS:
        return ListView_OnSortGroups(plv, (PFNLVGROUPCOMPARE)wParam, (void *)lParam);

    case LVM_ENABLEGROUPVIEW:
        return ListView_OnEnableGroupView(plv, (BOOL)wParam);

    case LVM_ISGROUPVIEWENABLED:
        return plv->fGroupView;

    case LVM_INSERTGROUP:
        return ListView_OnInsertGroup(plv, (int) wParam, (PLVGROUP)lParam);

    case LVM_SETGROUPINFO:
        return ListView_OnSetGroupInfo(plv, (int) wParam, (PLVGROUP)lParam);

    case LVM_GETGROUPINFO:
        return ListView_OnGetGroupInfo(plv, (int) wParam, (PLVGROUP)lParam);

    case LVM_REMOVEGROUP:
        return ListView_OnRemoveGroup(plv, (int) wParam);

    case LVM_REMOVEALLGROUPS:
        return ListView_OnRemoveAllGroups(plv);

    case LVM_HASGROUP:
        {
            LISTGROUP* pgrp = ListView_FindGroupFromID(plv, (int)wParam, NULL);
            if (pgrp)
                return 1;
            else
                return 0;
        }
        break;

    case LVM_SETGROUPMETRICS:
        return ListView_OnSetGroupMetrics(plv, (PLVGROUPMETRICS)lParam);

    case LVM_GETGROUPMETRICS:
        return ListView_OnGetGroupMetrics(plv, (PLVGROUPMETRICS)lParam);

    case LVM_SETTILEVIEWINFO:
        return ListView_OnSetTileViewInfo(plv, (PLVTILEVIEWINFO)lParam);

    case LVM_GETTILEVIEWINFO:
        return ListView_OnGetTileViewInfo(plv, (PLVTILEVIEWINFO)lParam);

    case LVM_SETTILEINFO:
        return ListView_OnSetTileInfo(plv, (PLVTILEINFO)lParam);

    case LVM_GETTILEINFO:
        return ListView_OnGetTileInfo(plv, (PLVTILEINFO)lParam);

    case LVM_SETINSERTMARK:
        if (ListView_IsRearrangeableView(plv) && (plv->ci.style & LVS_AUTOARRANGE) && !plv->fGroupView)
            return ListView_OnSetInsertMark(plv, (LPLVINSERTMARK)lParam);
        else
            return FALSE;

    case LVM_GETINSERTMARK:
        {
            LPLVINSERTMARK plvim = (LPLVINSERTMARK)lParam;

            if (plvim->cbSize != sizeof(LVINSERTMARK))
                return FALSE;

            plvim->dwFlags = (plv->fInsertAfter ? LVIM_AFTER : 0) | LVIM_SETFROMINFO;
            plvim->iItem = plv->iInsertItem;
            return TRUE;
        }

    case LVM_GETINSERTMARKRECT:
        {
            return ListView_OnGetInsertMarkRect(plv, (LPRECT)lParam);
        }

    case LVM_SETINSERTMARKCOLOR:
        {
            LRESULT lres = (LRESULT)ListView_OnGetInsertMarkColor(plv);
            plv->clrim = (COLORREF) lParam;
            return lres;
        }

    case LVM_GETINSERTMARKCOLOR:
        return ListView_OnGetInsertMarkColor(plv);

    case LVM_INSERTMARKHITTEST:
        {
            LPPOINT ppt = (LPPOINT)wParam;
            return ListView_OnInsertMarkHitTest(plv, ppt->x, ppt->y, (LPLVINSERTMARK)lParam);
        }

    case LVM_SETINFOTIP:
        {
            return ListView_OnSetInfoTip(plv, (PLVSETINFOTIP)lParam);
        }

    case LVM_SETOUTLINECOLOR:
        {
            LRESULT lres = (LRESULT)plv->clrOutline;
            plv->clrOutline = (COLORREF) lParam;
            return lres;
        }

    case LVM_GETOUTLINECOLOR:
        return (LRESULT)plv->clrOutline;

    case LVM_SETFROZENITEM:
        return ListView_OnSetFrozenItem(plv, (BOOL) wParam, (int) lParam);

    case LVM_GETFROZENITEM:
        return ListView_OnGetFrozenItem(plv);

    case LVM_SETFROZENSLOT:
        return ListView_OnSetFrozenSlot(plv, (BOOL) wParam, (LPPOINT)lParam);

    case LVM_GETFROZENSLOT:
        return ListView_OnGetFrozenSlot(plv, (LPRECT)lParam);

    case LVM_SETVIEWMARGINS:
        return ListView_OnSetViewMargins(plv, (LPRECT)lParam);

    case LVM_GETVIEWMARGINS:
        return ListView_OnGetViewMargins(plv, (LPRECT)lParam);

    case LVM_KEYBOARDSELECTED:
        ListView_CancelTipTrack(plv);
        return lParam == 0 ? ListView_OnKeyboardSelected(plv, (int)wParam) : FALSE;

    case LVM_CANCELEDITLABEL: 
        ListView_DismissEdit(plv, FALSE);
        return 1;

    case LVM_MAPINDEXTOID:
        return ListView_OnMapIndexToID(plv, (UINT)wParam);
    case LVM_MAPIDTOINDEX:
        return ListView_OnMapIdToIndex(plv, (UINT)wParam);

    case LVM_ISITEMVISIBLE:
        if (ListView_IsValidItemNumber(plv, (UINT)wParam))
        {
            return ListView_IsItemVisibleI(plv, (UINT)wParam);
        }
        else
        {
            return FALSE;
        }

    case WM_SIZE:
        if (plv)
        {
            ListView_OnSize(plv);
        }
        break;

    case WM_NOTIFY:
        return ListView_OnNotify(plv, wParam, (LPNMHDR)lParam);


    case WM_MOUSEMOVE:
        // Cancel manual track if mouse moved
        if (plv->lLastMMove != lParam)
        {
            ListView_CancelTipTrack(plv);

            if (plv->hwndToolTips)
            {
                UINT uFlags;
                int iHit, iSubHit;

                RelayToToolTips(plv->hwndToolTips, hwnd, uMsg, wParam, lParam);

                if (!ListView_IsKbdTipTracking(plv))
                {
                    // check that we are still on the hit item, pop it!
                    iHit = _ListView_ItemHitTest(plv, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), &uFlags, &iSubHit);

                    if (iHit != plv->iTTLastHit || iSubHit != plv->iTTLastSubHit)
                        ListView_PopBubble(plv);
                }
            }
        }

        plv->lLastMMove = lParam;
        ListView_OnMouseMove(plv, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), (UINT) wParam);
        break;

    case WM_GETOBJECT:
        if (lParam == OBJID_QUERYCLASSNAMEIDX)
            return MSAA_CLASSNAMEIDX_LISTVIEW;
        break;

    case WM_THEMECHANGED:
        if (plv->hTheme)
            CloseThemeData(plv->hTheme);

        plv->hTheme = OpenThemeData(plv->ci.hwnd, L"ListView");

        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        break;

    default:
        {
            LRESULT lres;
            if (CCWndProc(&plv->ci, uMsg, wParam, lParam, &lres))
                return lres;
        }

        if (uMsg == g_msgMSWheel) 
        {
            DWORD           dwStyle;
            int             sb;
            SCROLLINFO      si;
            int             cScrollUnitsPerLine;
            int             cPage;
            int             cLinesPerDetant;
            int             cDetants;
            int             dPos;
            int             iWheelDelta = (int)(short)HIWORD(wParam);
            BOOL            fScroll = !(wParam & (MK_SHIFT | MK_CONTROL));
            BOOL            fDataZoom = (BOOL) (wParam & MK_SHIFT);

            // Update count of scroll amount
            gcWheelDelta -= iWheelDelta;
            cDetants = gcWheelDelta / WHEEL_DELTA;
            if (cDetants != 0)
            {
                gcWheelDelta %= WHEEL_DELTA;
            }

            if (fScroll) 
            {
                if (g_ucScrollLines > 0 &&
                    cDetants != 0 &&
                    ((WS_VSCROLL | WS_HSCROLL) & (dwStyle = ListView_GetWindowStyle(plv)))) 
                {
                    sb = (dwStyle & WS_VSCROLL) ? SB_VERT : SB_HORZ;

                    // Get the scroll amount of one line
                    cScrollUnitsPerLine = _ListView_GetScrollUnitsPerLine(plv, sb);
                    ASSERT(cScrollUnitsPerLine > 0);

                    si.cbSize = sizeof(SCROLLINFO);
                    si.fMask = SIF_PAGE | SIF_POS;
                    if (!ListView_GetScrollInfo(plv, sb, &si))
                        return 1;

                    // The size of a page is at least one line, and
                    // leaves one line of overlap
                    cPage = (max(cScrollUnitsPerLine, (int)si.nPage - cScrollUnitsPerLine)) / cScrollUnitsPerLine;

                    // Don't scroll more than one page per detant
                    cLinesPerDetant = (int) min((ULONG) cPage, (ULONG) g_ucScrollLines);

                    dPos = cLinesPerDetant * cDetants * cScrollUnitsPerLine;

                    ListView_DismissEdit(plv, FALSE);
                    ListView_ComOnScroll(plv, SB_THUMBTRACK, si.nPos + dPos, 
                                         sb, cScrollUnitsPerLine, - 1);
                    ListView_UpdateScrollBars(plv);

                    // After scrolling, the tooltip might need to change
                    // so send the tooltip a fake mousemove message to force
                    // a recompute.  We use WM_NCMOUSEMOVE since our lParam
                    // is in screen coordinates, not client coordinates.
                    ListView_PopBubble(plv);
                    RelayToToolTips(plv->hwndToolTips, plv->ci.hwnd,
                                    WM_NCMOUSEMOVE, HTCLIENT, lParam);
                }
                return 1;
            } 
            else if (fDataZoom) 
            {
                LV_HITTESTINFO ht;
                ht.pt.x = GET_X_LPARAM(lParam);
                ht.pt.y = GET_Y_LPARAM(lParam);
                ScreenToClient(hwnd, &(ht.pt));

                // If we are rolling forward and we hit an item then navigate
                // into that item (simulate dblclk which will open it).  Otherwise
                // just fall through so it isn't handled.  In that case if we
                // are being hosted in explorer it will do a backwards
                // history navigation.
                if ((iWheelDelta > 0) && (ListView_OnSubItemHitTest(plv, &ht) >= 0) &&
                    (ht.flags & LVHT_ONITEM) && cDetants != 0)
                {
                    BYTE aKeyState[256];
                    // This is a bit yucky but when ListView_HandleMouse sends the
                    // notification to the listview owner we need to make sure that
                    // it doesn't think the shift key is down.  Otherwise it may
                    // perform some "alternate" action but in this case we always
                    // want it to perform the default open action.
                    //
                    // Strip the high bit of VK_SHIFT so that the shift key is
                    // not down.
                    if (GetKeyboardState(aKeyState))
                    {
                        aKeyState[VK_SHIFT] &= 0x7f;
                        SetKeyboardState(aKeyState);
                    }
                    ListView_HandleMouse(plv, FALSE, ht.pt.x, ht.pt.y, 0, TRUE);
                    ListView_HandleMouse(plv, TRUE, ht.pt.x, ht.pt.y, 0, TRUE);
                    return 1;
                }
                // else fall through
            }
        }

        break;
    }

DoDefault:
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

BOOL Listview_UpdateViewEffects(LV* plv)
{
    BOOL fChanged = FALSE;
    UINT fScroll = SHRegGetBoolUSValue(REGSTR_EXPLORER_ADVANCED, TEXT("ListviewScrollOver"),
                        FALSE, // Don't ignore HKCU
                        LISTVIEW_VFX_DEFAULT); // Assume a fast enough machine
    UINT fWatermark = SHRegGetBoolUSValue(REGSTR_EXPLORER_ADVANCED, TEXT("ListviewWatermark"),
                        FALSE, // Don't ignore HKCU
                        LISTVIEW_VFX_DEFAULT); // Assume a fast enough machine
    UINT fAlphaSelect = SHRegGetBoolUSValue(REGSTR_EXPLORER_ADVANCED, TEXT("ListviewAlphaSelect"),
                        FALSE, // Don't ignore HKCU
                        LISTVIEW_VFX_DEFAULT); // Assume a fast enough machine

    UINT fShadow = SHRegGetBoolUSValue(REGSTR_EXPLORER_ADVANCED, TEXT("ListviewShadow"),
                        FALSE, // Don't ignore HKCU
                        LISTVIEW_VFX_DEFAULT); // Assume a fast enough machine

    if (plv->fListviewAlphaSelect != fAlphaSelect          ||
        plv->fListviewShadowText != fShadow                ||
        plv->fListviewWatermarkBackgroundImages != fScroll ||
        plv->fListviewEnableWatermark != fWatermark)
    {
        fChanged = TRUE;
    }

    plv->fListviewAlphaSelect = BOOLIFY(fAlphaSelect);
    plv->fListviewShadowText = BOOLIFY(fShadow);
    plv->fListviewWatermarkBackgroundImages = BOOLIFY(fScroll);
    plv->fListviewEnableWatermark = BOOLIFY(fWatermark);


    return fChanged;
}

void ListView_OnWinIniChange(LV* plv, WPARAM wParam, LPARAM lParam)
{
    // REARCHITECT:  will this also catch sysparametersinfo?
    // we need a general way of handling this, not
    // just relying on the listview.
    InitGlobalMetrics(wParam);

    if (Listview_UpdateViewEffects(plv))
    {
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }

    switch (wParam) 
    {
        case 0:
        case SPI_SETNONCLIENTMETRICS:
        case SPI_SETICONTITLELOGFONT:
        case SPI_SETICONMETRICS:
            // If wParam is 0, only reload settings if lParam is 0 too.  This catches the wild-card scenario
            // (like the old plus tab which does WM_WININICHANGE, 0, 0) but allows us to ignore wParam = 0
            // and lParam = lpszSectionName.  Reduces unecessary flashing.
            if (wParam || !lParam)
            {
                if (!(plv->flags & LVF_ICONSPACESET))
                    ListView_OnSetIconSpacing(plv, (LPARAM)-1);

                if (plv->flags & LVF_FONTCREATED)
                    ListView_OnSetFont(plv, NULL, TRUE);

                // Force a recalc of all the icon regions by stripping and
                // then adding back the LVS_EX_REGIONAL bit.
                if (plv->exStyle & LVS_EX_REGIONAL) 
                {
                    ListView_ExtendedStyleChange(plv, 0, LVS_EX_REGIONAL);
                    ListView_ExtendedStyleChange(plv, LVS_EX_REGIONAL, LVS_EX_REGIONAL);
                }
            }
            break;

        default:
            break;
    }

    // If we are in an Iconic view and the user is in autoarrange mode,
    // then we need to arrange the items.
    //
    if ((ListView_IsSmallView(plv) || ListView_IsIconView(plv)))
    {
        // Call off to the arrange function.
        if (ListView_IsOwnerData(plv))
            ListView_OnArrange(plv, LVA_DEFAULT);
        else 
            ListView_ArrangeOrSnapToGrid(plv);
    }
}

BOOL ListView_OnCreate(LV* plv, CREATESTRUCT* lpCreateStruct)
{
    Listview_UpdateViewEffects(plv);
    InitDitherBrush();

    CIInitialize(&plv->ci, plv->ci.hwnd, lpCreateStruct);

    plv->wView = (WORD)(plv->ci.style & LVS_TYPEMASK);

    plv->dwExStyle = lpCreateStruct->dwExStyle;

    if (plv->ci.style & WS_VISIBLE)
        plv->flags |= LVF_VISIBLE;

    ListView_GetRegIASetting(&g_bUseDblClickTimer);

    if (ListView_IsOwnerData(plv))
    {
        // ownerdata initialization
        plv->plvrangeSel = LVRange_Create();
        if (NULL == plv->plvrangeSel)
           goto error0;

       plv->plvrangeCut = LVRange_Create();
       if (NULL == plv->plvrangeCut)
          goto error0;
    }
    else
    {
        ASSERT(plv->plvrangeSel == NULL);
        ASSERT(plv->plvrangeCut == NULL);

        plv->hdpa = DPA_CreateEx(LV_HDPA_GROW, plv->hheap);
        if (!plv->hdpa)
            goto error0;

        plv->hdpaZOrder = DPA_CreateEx(LV_HDPA_GROW, plv->hheap);
        if (!plv->hdpaZOrder)
            goto error1;
    }

    ASSERT(plv->nWorkAreas == 0);
    ASSERT(plv->prcWorkAreas == NULL);
    ASSERT(plv->fIconsPositioned == FALSE);
    plv->iNoHover = -1;
    plv->dwHoverTime = HOVER_DEFAULT;
    plv->iHot = -1;
    plv->iEdit = -1;
    plv->iFocus = -1;
    plv->iDrag = -1;
    plv->iTTLastHit = -1;
    plv->iFreeSlot = -1;
    plv->rcView.left = RECOMPUTE;
    plv->iLastColSort = -1;
    ASSERT(plv->sizeTile.cx == 0);
    ASSERT(plv->sizeTile.cy == 0);
    ASSERT(plv->dwTileFlags == 0);
    plv->cSubItems = 1;
    SetRect(&plv->rcBorder, 0, 12, 0, 0);
    plv->crHeader = GetSysColor(COLOR_WINDOWTEXT);
    plv->crTop = GetSysColor(COLOR_BTNFACE);
    plv->crBottom = CLR_NONE;
    plv->crLeft = CLR_NONE;
    plv->crRight = CLR_NONE;
    plv->paddingLeft = 12;
    plv->paddingTop = 12;
    plv->paddingRight = 0;
    plv->paddingBottom = 12;
    plv->szWatermark.cx = 200;
    plv->szWatermark.cy = 200;


    ASSERT(plv->iMSAAMin == plv->iMSAAMax);

    plv->sizeClient.cx = lpCreateStruct->cx;
    plv->sizeClient.cy = lpCreateStruct->cy;

    // Setup flag to say if positions are in small or large view
    if (ListView_IsSmallView(plv))
        plv->flags |= LVF_ICONPOSSML;

    // force calculation of listview metrics
    ListView_OnSetFont(plv, NULL, FALSE);

    plv->cxItem = ListView_ComputeCXItemSize(plv);

    // if we're in ownerdraw report mode, the size got saved to cyItemSave
    // at creation time, both need to have this
    if ((plv->ci.style & LVS_OWNERDRAWFIXED) && ListView_IsReportView(plv))
        plv->cyItem = plv->cyItemSave;
    else
        plv->cyItemSave = plv->cyItem;

    ListView_OnSetIconSpacing(plv, (LPARAM)-1);

    ListView_UpdateScrollBars(plv);     // sets plv->cItemCol

    plv->clrBk = CLR_NONE;
    plv->clrText = CLR_DEFAULT;
    plv->clrTextBk = CLR_DEFAULT;
    plv->clrHotlight = CLR_DEFAULT;
    plv->clrOutline = CLR_DEFAULT;

    // create the bk brush, and set the imagelists colors if needed
    ListView_OnSetBkColor(plv, g_clrWindow);

    // Initialize report view fields
    plv->xTotalColumnWidth = RECOMPUTE;

    if (ListView_IsReportView(plv))
        ListView_RInitialize(plv, FALSE);

    if (plv->ci.style & WS_DISABLED) 
    {
        plv->ci.style &= ~WS_DISABLED;
        ListView_EnableWindow(plv, FALSE);
    }

    // tooltip for unfolding name lables

    plv->hwndToolTips = CreateWindowEx(WS_EX_TRANSPARENT, TOOLTIPS_CLASS, NULL,
                                     WS_POPUP|TTS_NOPREFIX, 0, 0, 0, 0,
                                     NULL, NULL, g_hinst, NULL);
    if (plv->hwndToolTips)
    {
        TOOLINFO ti;

        ti.cbSize = sizeof(ti);
        ti.uFlags = TTF_TRANSPARENT|TTF_ABSOLUTE;
        ti.hwnd = plv->ci.hwnd;
        ti.uId = 0;
        ti.hinst = NULL;
        ti.lpszText = LPSTR_TEXTCALLBACK;

        GetClientRect(plv->ci.hwnd, &ti.rect);
        SendMessage(plv->hwndToolTips, TTM_ADDTOOL, 0, (LPARAM) &ti);

        /* Ensure that the tooltips use the same font as the view */
        FORWARD_WM_SETFONT(plv->hwndToolTips, plv->hfontLabel, FALSE, SendMessage);
    }

    SetTimer(plv->ci.hwnd, IDT_ONECLICKOK, GetDoubleClickTime(), NULL);

    return TRUE;

error1:
    DPA_Destroy(plv->hdpa);
    plv->hdpa = NULL;

error0:
    if (plv->plvrangeSel)
    {
        plv->plvrangeSel->lpVtbl->Release(plv->plvrangeSel);
        plv->plvrangeSel = NULL;
    }
    if (plv->plvrangeCut)
    {
        plv->plvrangeCut->lpVtbl->Release(plv->plvrangeCut);
        plv->plvrangeCut = NULL;
    }

    return FALSE;
}

void ListView_DeleteHrgnInval(LV* plv)
{
    if (plv->hrgnInval && plv->hrgnInval != (HRGN)ENTIRE_REGION)
        DeleteObject(plv->hrgnInval);
    plv->hrgnInval = NULL;
}

void ListView_OnDestroy(LV* plv)
{
    //
    // The tooltip window may or may not exist at this point.  It
    // depends if the owning window of the tips is also being destroy.
    // If so, then the tips are gone already.
    //

    if (IsWindow(plv->hwndToolTips))
        DestroyWindow(plv->hwndToolTips);

    if (plv->hCurHot)
        DestroyCursor(plv->hCurHot);

    plv->hwndToolTips = NULL;

    Str_Set(&plv->pszTip, NULL);
    Str_Set(&plv->pszEmptyText, NULL);

    TerminateDitherBrush();

    if (!ListView_IsOwnerData(plv))
    {
       // Make sure to notify the app
       ListView_OnDeleteAllItems(plv);
    }

    if ((plv->flags & LVF_FONTCREATED) && plv->hfontLabel)
    {
        DeleteObject(plv->hfontLabel);
        // plv->flags &= ~LVF_FONTCREATED;
        // plv->hwfontLabel = NULL;
    }

    if (plv->hfontGroup)
    {
        DeleteObject(plv->hfontGroup);
    }

    if (plv->hFontHot)
    {
        DeleteObject(plv->hFontHot);
    }

    if (plv->hbmpWatermark)
    {
        DeleteObject(plv->hbmpWatermark);
    }

    ListView_DeleteHrgnInval(plv);

    if (plv->prcWorkAreas)
    {
        // This assert is bogus: If the app created work areas then deleted
        // them, nWorkAreas will be 0 but prcWorkAreas will be non-NULL.
        // ASSERT(plv->nWorkAreas > 0);
        LocalFree(plv->prcWorkAreas);
    }

    if (plv->hdpaGroups)
    {
        DPA_DestroyCallback(plv->hdpaGroups, DestroyGroups, NULL);
        plv->hdpaGroups = NULL;
    }
}

void ListView_OnNCDestroy(LV* plv)
{
    if ((!(plv->ci.style & LVS_SHAREIMAGELISTS)) || ListView_CheckBoxes(plv)) 
    {

        if (plv->himlState &&
            (plv->himlState != plv->himl) &&
            (plv->himlState != plv->himlSmall))
        {
            ImageList_Destroy(plv->himlState);
        }
    }

    if (!(plv->ci.style & LVS_SHAREIMAGELISTS))
    {
        if (plv->himl)
            ImageList_Destroy(plv->himl);
        if (plv->himlSmall)
            ImageList_Destroy(plv->himlSmall);
    }

    if (ListView_IsOwnerData(plv))
    {
        if (plv->plvrangeSel)
        {
            plv->plvrangeSel->lpVtbl->Release(plv->plvrangeSel);
            plv->plvrangeSel = NULL;
        }
        if (plv->plvrangeCut)
        {
            plv->plvrangeCut->lpVtbl->Release(plv->plvrangeCut);
            plv->plvrangeCut = NULL;
        }
        plv->cTotalItems = 0;
    }

    ListView_ReleaseBkImage(plv);

    if (plv->hbrBk)
        DeleteBrush(plv->hbrBk);

    if (plv->hdpa)
        DPA_Destroy(plv->hdpa);

    if (plv->hdpaZOrder)
        DPA_Destroy(plv->hdpaZOrder);

    ListView_RDestroy(plv);

    IncrementSearchFree(&plv->is);

    ListView_SetPtr(plv->ci.hwnd, NULL);
    if (plv->hTheme)
        CloseThemeData(plv->hTheme);
    NearFree(plv);
}


// sets the background color for the listview
//
// this creats the brush for drawing the background as well
// as sets the imagelists background color if needed

BOOL ListView_OnSetBkColor(LV* plv, COLORREF clrBk)
{
    if (plv->clrBk != clrBk)
    {
        if (plv->hbrBk)
        {
            DeleteBrush(plv->hbrBk);
            plv->hbrBk = NULL;
        }

        if (clrBk != CLR_NONE)
        {
            plv->hbrBk = CreateSolidBrush(clrBk);
            if (!plv->hbrBk)
                return FALSE;
        }

        // don't mess with the imagelist color if things are shared

        if (!(plv->ci.style & LVS_SHAREIMAGELISTS))
        {

            if (plv->himl)
                ImageList_SetBkColor(plv->himl, clrBk);

            if (plv->himlSmall)
                ImageList_SetBkColor(plv->himlSmall, clrBk);

            if (plv->himlState)
                ImageList_SetBkColor(plv->himlState, clrBk);
        }

        plv->clrBk = clrBk;
    }
    return TRUE;
}

void InitBrushOrg(LV* plv, HDC hdc)
{
    int x;

    if (ListView_IsSmallView(plv) || ListView_IsIconView(plv))
    {
        x = plv->ptOrigin.x;
    }
    else if (ListView_IsListView(plv))
    {
        x = plv->xOrigin;
    } 
    else 
    {
        x = (int)plv->ptlRptOrigin.x;
    }

    SetBrushOrgEx(hdc, -x, 0, NULL);
}

void ListView_InvalidateRegion(LV* plv, HRGN hrgn)
{
    if (hrgn) 
    {
        if (plv->hrgnInval == NULL) 
        {
            plv->hrgnInval = hrgn;
        } 
        else 
        {

            // union it in if the entire region isn't marked for invalidate
            if (plv->hrgnInval != (HRGN)ENTIRE_REGION) 
            {
                UnionRgn(plv->hrgnInval, plv->hrgnInval, hrgn);
            }
            DeleteObject(hrgn);
        }
    }
}

//
//  Used when a watermark is the listview's background (detected via clrTextBk
//  being CLR_NONE) to perform a flicker-free scroll of the client area, using
//  an offscreen bitmap
//
//  potential perf issue -- caching DC and/or bitmap instead of create/destroy
//                          on each call
//
//  jeffbog 2/29/96
//

void LVSeeThruScroll(LV *plv, LPRECT lprcUpdate)
{
    HDC     hdcOff;
    HBITMAP hbmpOff;
    int     x,y,cx,cy;
    HDC     hdc = GetDC(plv->ci.hwnd);

    if (!lprcUpdate)
    {
        x = y = 0;
        cx = plv->sizeClient.cx;
        cy = plv->sizeClient.cy;
    }
    else
    {
        x  = lprcUpdate->left;
        y  = lprcUpdate->top;
        cx = lprcUpdate->right - x;
        cy = lprcUpdate->bottom - y;
    }

    hdcOff  = CreateCompatibleDC(hdc);
    hbmpOff = CreateCompatibleBitmap(hdc, plv->sizeClient.cx, plv->sizeClient.cy);
    SelectObject(hdcOff, hbmpOff);

    SendMessage(plv->ci.hwnd, WM_PRINT, (WPARAM)hdcOff, PRF_CLIENT | PRF_ERASEBKGND);
    BitBlt(hdc, x, y, cx, cy, hdcOff, x, y, SRCCOPY);
    ReleaseDC(plv->ci.hwnd, hdc);
    DeleteDC(hdcOff);
    DeleteObject(hbmpOff);
}

void ListView_OnPaint(LV* plv, HDC hdc)
{
    PAINTSTRUCT ps;
    RECT rcUpdate;
    HDC hPaintDC = hdc;
    HDC hMemDC = NULL;
    HBITMAP hMemBm = NULL;
    HBITMAP hOldBm;
    BOOL fInternDC = FALSE;

    // Before handling WM_PAINT, go ensure everything's recomputed...
    //
    if (plv->rcView.left == RECOMPUTE)
        ListView_Recompute(plv);

    // If we're in report view, update the header window: it looks
    // better this way...
    //
    if (ListView_IsReportView(plv) && plv->hwndHdr)
        UpdateWindow(plv->hwndHdr);

    // If nothing to do (i.e., we recieved a WM_PAINT because
    // of an RDW_INTERNALPAINT, and we didn't invalidate anything)
    // don't bother with the Begin/EndPaint.
    //
    if (hdc || GetUpdateRect(plv->ci.hwnd, &rcUpdate, FALSE))
    {
        if (!(plv->flags & LVF_VISIBLE))
        {
            plv->flags |= LVF_VISIBLE;
            // We may try to resize the column
            ListView_MaybeResizeListColumns(plv, 0, ListView_Count(plv)-1);
            ListView_UpdateScrollBars(plv);
        }

        // this needs to be done before the beginpaint because it clears
        // out the update region
        if (!(plv->flags & LVF_REDRAW))
        {
            // add this region to our local invalidate region
            HRGN hrgn = CreateRectRgn(0, 0, 0,0);
            if (hrgn)
            {

                // ok if GetUpdateRgn fails... then hrgn will still be
                // and empty region..
                GetUpdateRgn(plv->ci.hwnd, hrgn, FALSE);
                ListView_InvalidateRegion(plv, hrgn);
            }
        }

        // Get device context
        if (!hdc)
        {
            hPaintDC = hdc = BeginPaint(plv->ci.hwnd, &ps);
            fInternDC = TRUE;
        }
        else
        {
            GetClipBox(hdc, &ps.rcPaint);
        }

        // Skip painting if redrawing is not enabled but complete cycle (EndPaint)
        if (ListView_RedrawEnabled(plv))
        {
            // Create memory surface and map rendering context if double buffering
            if (ListView_IsDoubleBuffer(plv))
            {
                // Only make large enough for clipping region
                hMemDC = CreateCompatibleDC(hdc);
                if (hMemDC)
                {
                    hMemBm = CreateCompatibleBitmap(hdc, RECTWIDTH(ps.rcPaint), RECTHEIGHT(ps.rcPaint));
                    if (hMemBm)
                    {
                        hOldBm = SelectObject(hMemDC, hMemBm);

                        // Offset painting to paint in region
                        OffsetWindowOrgEx(hMemDC, ps.rcPaint.left, ps.rcPaint.top, NULL);
                    }
                    else
                    {
                        DeleteDC(hMemDC);
                        hMemDC = NULL;
                    }
                }
            }
            
            if (hMemDC)
            {
                // Use memory DC if it was created
                hPaintDC = hMemDC;
            }

            if (hPaintDC)
            {
                // Setup brush offset for list view scrolling
                InitBrushOrg(plv, hPaintDC);

                ListView_DebugDisplayClipRegion(plv, &ps.rcPaint, NULL);

                // Draw backround in this pass if double buffering, otherwise, it was handled in WM_ERASEBKGND
                if (ListView_IsDoubleBuffer(plv))
                {
                    // Add on buffer offset to scrolling offset
                    POINT ptBrOrg;
                    GetBrushOrgEx(hPaintDC, &ptBrOrg);

                    SetBrushOrgEx(hPaintDC, ptBrOrg.x - ps.rcPaint.left, ptBrOrg.y - ps.rcPaint.top, NULL);

                    ListView_DrawBackground(plv, hPaintDC, &ps.rcPaint);
                }

                // Draw foreground
                ListView_Redraw(plv, hPaintDC, &ps.rcPaint);

                // Complete double buffering by blitting and freeing off-screen objects
                if (ListView_IsDoubleBuffer(plv) &&
                    hMemDC)
                {

                    if (plv->flags & LVF_MARQUEE)
                    {
                        HDC h = CreateCompatibleDC(hMemDC);
                        if (h)
                        {
                            HBITMAP hbmp, hbmpOld;
                            BLENDFUNCTION bf = {0};
                            RECT rcInvalid;
                            RECT rcMarquee = {0, 0, RECTWIDTH(plv->rcMarquee), RECTHEIGHT(plv->rcMarquee)};
                            IntersectRect(&rcInvalid, &ps.rcPaint, &plv->rcMarquee);
                            if (!IsRectEmpty(&rcInvalid))
                            {
                                hbmp = CreateCompatibleBitmap(hMemDC, RECTWIDTH(rcInvalid), RECTHEIGHT(rcInvalid));
                                if (hbmp)
                                {
                                    hbmpOld = SelectObject(h, hbmp);

                                    FillRectClr(h, &rcMarquee, g_clrMenuHilight);

                                    bf.BlendOp = AC_SRC_OVER;
                                    bf.SourceConstantAlpha = 70;

                                    GdiAlphaBlend(hMemDC, rcInvalid.left, rcInvalid.top, RECTWIDTH(rcInvalid), RECTHEIGHT(rcInvalid), 
                                        h, 0, 0, RECTWIDTH(rcInvalid), RECTHEIGHT(rcInvalid), bf);
                                    SelectObject(h, hbmpOld);
                                    DeleteObject(hbmp);
                                }

                                SHOutlineRect(hMemDC, &plv->rcMarquee, g_clrHighlight, g_clrHighlight);
                            }

                            DeleteDC(h);
                        }
                    }


                    BitBlt(hdc, ps.rcPaint.left, ps.rcPaint.top, RECTWIDTH(ps.rcPaint), RECTHEIGHT(ps.rcPaint), hMemDC, ps.rcPaint.left, ps.rcPaint.top, SRCCOPY);

                    SelectObject(hMemDC, hOldBm);

                    DeleteObject(hMemBm);
                    DeleteDC(hMemDC);
                }
            }
        }
        
        // Free DC if necessary
        if (fInternDC)
            EndPaint(plv->ci.hwnd, &ps);
    }
}

void ListView_DrawSimpleBackground(LV *plv, HDC hdc, POINT* ppt, RECT *prcClip)
{
    if (plv->clrBk != CLR_NONE)
    {
        //
        // We just have a simple background color.
        //
        FillRect(hdc, prcClip, plv->hbrBk);
    }
    else
    {
        //
        // Parent HWND draws the background for us.
        //
        POINT pt = {0,0}, ptOrig;
        MapWindowPoints(plv->ci.hwnd, plv->ci.hwndParent, &pt, 1); //Map it to parent's co-ordinates
        OffsetWindowOrgEx(hdc, pt.x, pt.y, &ptOrig);
        
        SendMessage(plv->ci.hwndParent, WM_ERASEBKGND, (WPARAM)hdc, (LPARAM)0); //Make the parent draw into child's DC
        SetWindowOrgEx(hdc, ptOrig.x, ptOrig.y, NULL);
    }
}

#define SATURATE(x, y) { int ___cTemp; ___cTemp = (x) + ((y + 1) * 100 * (x)) / 1000; if (___cTemp > 0xFF) ___cTemp = 0xFF; (x) = (BYTE)___cTemp; }
void SaturateDC(void * pvBitmapBits, int Amount, RECT* prcColumn, RECT* prcImage)
{
    long x, y;

    long uHeight = RECTHEIGHT(*prcImage);
    long uWidth =  RECTWIDTH(*prcImage);
    ULONG* pul = (ULONG*)pvBitmapBits;

    for (y = 0; y < uHeight ;y++)
    {
        for (x = 0; x < uWidth; x++)
        {
            if (x + prcImage->left >= prcColumn->left && x + prcImage->left <= prcColumn->right)
            {
                RGBQUAD* prgb = (RGBQUAD*)&pul[y * uWidth + x];

                SATURATE(prgb->rgbRed, Amount);
                SATURATE(prgb->rgbGreen, Amount);
                SATURATE(prgb->rgbBlue, Amount);
            }
        }
    }
}

void SaturateSortColumn(LV* plv, HDC hdc, void * pvBitmapBits, POINT* ppt, RECT* prcClip)
{
    RECT rc;
    RECT rcUpdate = *prcClip;
    Header_GetItemRect(plv->hwndHdr, plv->iLastColSort, &rc);

    OffsetRect(&rc, ppt->x, 0);

    if (rcUpdate.left < rc.left)
        rcUpdate.left = rc.left;
    if (rcUpdate.right > rc.right)
        rcUpdate.right = rc.right;

    if (rcUpdate.left < rcUpdate.right ||
        IntersectRect(&rc, &rcUpdate, prcClip))
    {
        SaturateDC(pvBitmapBits, 0, &rcUpdate, prcClip);
    }
}

HDC PrepBackgroundDIBSection(HDC hdcDest, RECT* prc, void ** ppvBitmap, HBITMAP* phbmpOld)
{
    HDC hdcRet = CreateCompatibleDC(hdcDest);
    if (hdcRet)
    {
        HBITMAP hbmp;
        BITMAPINFO bi = {0};
        bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
        bi.bmiHeader.biWidth = RECTWIDTH(*prc);
        bi.bmiHeader.biHeight = RECTHEIGHT(*prc);
        bi.bmiHeader.biPlanes = 1;
        bi.bmiHeader.biBitCount = 32;
        bi.bmiHeader.biCompression = BI_RGB;

        hbmp = CreateDIBSection(hdcRet, &bi, DIB_RGB_COLORS, ppvBitmap, NULL, 0);

        *phbmpOld = (HBITMAP)SelectObject(hdcRet, hbmp);

        SetViewportOrgEx(hdcRet, -prc->left, -prc->top, NULL);
    }
    return hdcRet;
}

void CleanupBackgroundDIBSection(HDC hdc, HBITMAP hbmpOld)
{
    if (hdc)
    {
        HBITMAP hbmp = SelectObject(hdc, hbmpOld);
        if (hbmp)
            DeleteObject(hbmp);
        DeleteDC(hdc);
    }
}

void ListView_DrawBackground(LV *plv, HDC hdc, RECT *prcClip)
{
    HRGN hrgnClipSave;
    RECT rcClip;
    POINT ptBackOrg = {0};

    //
    // Compute ptBackOrg (aka scrolling offset), based on view style.
    //
    switch (plv->wView)
    {
        case LV_VIEW_LIST:
            ptBackOrg.x = -plv->xOrigin;
            ptBackOrg.y = 0;
            break;

        case LV_VIEW_DETAILS:
            ptBackOrg.x = -plv->ptlRptOrigin.x;
            ptBackOrg.y = -plv->ptlRptOrigin.y + plv->yTop;
            break;

        default:
            ptBackOrg.x = -plv->ptOrigin.x;
            ptBackOrg.y = -plv->ptOrigin.y;
            break;
    }


    // Optimize the common/simple case
    if (!(plv->pImgCtx && plv->fImgCtxComplete))
    {

        ListView_DrawSimpleBackground(plv, hdc, &ptBackOrg, prcClip);

        if (ListView_IsWatermarked(plv))
        {
            HDC hdcMem = CreateCompatibleDC(hdc);
            if (hdcMem)
            {
                HBITMAP hbmp = (HBITMAP)SelectObject(hdcMem, plv->hbmpWatermark);
                RECT rcWatermark;
                GetClientRect(plv->ci.hwnd, &rcWatermark);
                rcWatermark.left = rcWatermark.right - plv->szWatermark.cx;
                rcWatermark.top = rcWatermark.bottom - plv->szWatermark.cy;
                BitBlt(hdc, rcWatermark.left, rcWatermark.top, plv->szWatermark.cx, plv->szWatermark.cy,
                    hdcMem, 0, 0, SRCCOPY);
                SelectObject(hdcMem, hbmp);
                DeleteDC(hdcMem);
            }
        }

        if (plv->wView == LV_VIEW_DETAILS &&
             plv->iLastColSort != -1 && !plv->fGroupView)
        {
            RECT rcUpdate = *prcClip;
            RECT rc;
            COLORREF cr;

            Header_GetItemRect(plv->hwndHdr, plv->iLastColSort, &rc);

            OffsetRect(&rc, ptBackOrg.x, 0);

            if (rcUpdate.left < rc.left)
                rcUpdate.left = rc.left;
            if (rcUpdate.right > rc.right)
                rcUpdate.right = rc.right;

            cr = GetSortColor(10, plv->clrBk);

            FillRectClr(hdc, &rcUpdate, cr);
        }


        return;
    }

    //
    // Save the old clipping region,
    // since we whack on it a lot.
    //
    hrgnClipSave = CreateRectRgnIndirect(prcClip);
    if (hrgnClipSave)
    {
        if (GetClipRgn(hdc, hrgnClipSave) <= 0)
        {
            DeleteObject(hrgnClipSave);
            hrgnClipSave = NULL;
        }
    }

    //
    // Clip the clipping region to the caller's rectangle,
    // and save the final clipping rectangle in rcClip.
    //
    if (prcClip != NULL)
    {
        IntersectClipRect(hdc, prcClip->left, prcClip->top,
                               prcClip->right, prcClip->bottom);
    }
    GetClipBox(hdc, &rcClip);

    if (plv->pImgCtx && plv->fImgCtxComplete)
    {
        RECT rcImage, rcClient;
        ULONG ulState;
        SIZE sizeImg;
        ListView_Realize(plv, hdc, TRUE, FALSE);

        switch (plv->ulBkImageFlags & LVBKIF_STYLE_MASK)
        {
        case LVBKIF_STYLE_TILE:
            {
                HDC hdcBackBuffer = hdc;
                HBITMAP hbmpOld;
                void * pvBits = NULL;
                POINT ptBackTile = {0};
                if (plv->wView == LV_VIEW_DETAILS && 
                    plv->iLastColSort != -1)
                {
                    hdcBackBuffer = PrepBackgroundDIBSection(hdc, prcClip, &pvBits, &hbmpOld);
                    if (hdcBackBuffer == NULL)
                        hdcBackBuffer = hdc;
                }

                if (!plv->fListviewWatermarkBackgroundImages)
                    ptBackTile = ptBackOrg;

                if (plv->ulBkImageFlags & LVBKIF_FLAG_TILEOFFSET)
                {
                    // These offsets are in pixels, not percent (sorry)
                    ptBackTile.x -= plv->xOffsetPercent;
                    ptBackTile.y -= plv->yOffsetPercent;
                }
                IImgCtx_Tile(plv->pImgCtx, hdcBackBuffer, &ptBackTile, prcClip, NULL);

                if (hdcBackBuffer != hdc)
                {
                    SaturateSortColumn(plv, hdcBackBuffer, pvBits, &ptBackOrg, prcClip);
                    BitBlt(hdc, prcClip->left, prcClip->top, RECTWIDTH(*prcClip), RECTHEIGHT(*prcClip), hdcBackBuffer, prcClip->left, prcClip->top, SRCCOPY);
                    CleanupBackgroundDIBSection(hdcBackBuffer, hbmpOld);
                }

            }
            ExcludeClipRect(hdc, prcClip->left, prcClip->top,
                                 prcClip->right, prcClip->bottom);
            break;

        case LVBKIF_STYLE_NORMAL:
            //
            // Start with the base image.
            //
            IImgCtx_GetStateInfo(plv->pImgCtx, &ulState, &sizeImg, FALSE);
            rcImage.left = 0;
            rcImage.top = 0;
            rcImage.right = sizeImg.cx;
            rcImage.bottom = sizeImg.cy;

            //
            // Adjust for caller offsets.
            //
            GetClientRect(plv->ci.hwnd, &rcClient);
            if (plv->xOffsetPercent)
            {
                LONG dx = plv->xOffsetPercent * (rcClient.right - sizeImg.cx) / 100;

                rcImage.left += dx;
                rcImage.right += dx;
            }
            if (plv->yOffsetPercent)
            {
                LONG dy = plv->yOffsetPercent * (rcClient.bottom - sizeImg.cy) / 100;

                rcImage.top += dy;
                rcImage.bottom += dy;
            }

            //
            // Adjust for ptBackOrg (scrolling offset).
            //
            rcImage.left += ptBackOrg.x;
            rcImage.top += ptBackOrg.y;
            rcImage.right += ptBackOrg.x;
            rcImage.bottom += ptBackOrg.y;

            //
            // Draw the image, if necessary.
            //
            if (RectVisible(hdc, &rcImage))
            {
                IImgCtx_Draw(plv->pImgCtx, hdc, &rcImage);
                ExcludeClipRect(hdc, rcImage.left, rcImage.top,
                                     rcImage.right, rcImage.bottom);
            }
            break;
        }
    }

    //
    // Now draw the rest of the background.
    //
    if (RectVisible(hdc, prcClip))
    {
        ListView_DrawSimpleBackground(plv, hdc, &ptBackOrg, prcClip);
    }

    //
    // Restore old clipping region.
    //
    SelectClipRgn(hdc, hrgnClipSave);
    if (hrgnClipSave)
    {
        DeleteObject(hrgnClipSave);
    }
}

BOOL ListView_OnEraseBkgnd(LV *plv, HDC hdc)
{
    // If redraw is turned off, still process erase bk
    if (ListView_IsDoubleBuffer(plv) && (plv->flags & LVF_REDRAW))
    {
        // No erase, will happen in WM_PAINT handler (ListView_OnPaint)
        return FALSE;
    }
    else
    {
        RECT rcClip;

        //
        // We draw our own background, erase with it.
        //
        GetClipBox(hdc, &rcClip);
        ListView_DrawBackground(plv, hdc, &rcClip);

        return TRUE;
    }
}

void ListView_OnCommand(LV* plv, int id, HWND hwndCtl, UINT codeNotify)
{
    if (hwndCtl == plv->hwndEdit)
    {
        switch (codeNotify)
        {
        case EN_UPDATE:
            // We don't want flicker during replacing current selection
            // as we use selection for IME composition.
            //
            if ((g_fDBCSInputEnabled) && (plv->flags & LVF_INSERTINGCOMP))
                break;
            // We will use the ID of the window as a Dirty flag...
            if (IsWindowVisible(plv->hwndEdit))
            {
                SetWindowID(plv->hwndEdit, 1);
                ListView_SetEditSize(plv);
            }
            break;

        case EN_KILLFOCUS:
            // We lost focus, so dismiss edit and save changes
            // (Note that the owner might reject the change and restart
            // edit mode, which traps the user.  Owners need to give the
            // user a way to get out.)
            //

            //
            //  Fix horrible undocumented hanging problem:  LVN_ENDLABELEDIT
            //  is sent in response to EN_KILLFOCUS, which is send in response
            //  to WM_KILLFOCUS, and it is undocumented that you cannot display
            //  UI during WM_KILLFOCUS when a journal record hook is active,
            //  because the presence of a hook forces serialization of activation,
            //  and so when you put up UI, you generate activation changes, which
            //  get stuck because you haven't finished responding to the previous
            //  WM_KILLFOCUS message yet.
            //
            //  See NT bug 414634.
            //
            if (InSendMessage())
                ReplyMessage(0);

            if (!ListView_DismissEdit(plv, FALSE))
                return;
             break;

         case HN_BEGINDIALOG:  // pen windows is bringing up a dialog
             ASSERT(GetSystemMetrics(SM_PENWINDOWS)); // only on a pen system
             plv->fNoDismissEdit = TRUE;
             break;

         case HN_ENDDIALOG: // pen windows has destroyed dialog
             ASSERT(GetSystemMetrics(SM_PENWINDOWS)); // only on a pen system
             plv->fNoDismissEdit = FALSE;
             break;
        }

        // Forward edit control notifications up to parent
        //
        if (IsWindow(hwndCtl))
            FORWARD_WM_COMMAND(plv->ci.hwndParent, id, hwndCtl, codeNotify, SendMessage);
    }
}

void ListView_OnWindowPosChanged(LV* plv, const WINDOWPOS* lpwpos)
{
    if (!lpwpos || !(lpwpos->flags & SWP_NOSIZE))
    {
        RECT rc;
        int iOldSlots;

        // Update scrollbars first, since ListView_OnEnsureVisible requires accurate scroll info
        ListView_UpdateScrollBars(plv);

        if (ListView_IsOwnerData(plv) &&
                ListView_IsSlotView(plv))
        {
            iOldSlots = ListView_GetSlotCount(plv, TRUE, NULL, NULL);
        }

        GetClientRect(plv->ci.hwnd, &rc);
        plv->sizeClient.cx = rc.right;
        plv->sizeClient.cy = rc.bottom;

        if (ListView_IsAutoArrangeView(plv))
        {
            // Call off to the arrange function.
            ListView_ArrangeOrSnapToGrid(plv);
        }

        if (ListView_IsOwnerData(plv))
        {
            plv->rcView.left = RECOMPUTE;
            ListView_Recompute(plv);

            ListView_DismissEdit(plv, FALSE);
            if (ListView_IsSlotView(plv))
            {
                // Uses the
                int iNewSlots = ListView_GetSlotCount(plv, TRUE, NULL, NULL);
                if ((iNewSlots != iOldSlots) && (ListView_Count(plv) > min(iNewSlots, iOldSlots)))
                    RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
            }
        }

        ListView_RInitialize(plv, TRUE);

        if (ListView_IsWatermarked(plv))
        {
            GetClientRect(plv->ci.hwnd, &rc);
            rc.left = rc.right - plv->szWatermark.cx;
            rc.top = rc.bottom - plv->szWatermark.cy;
            InvalidateRect(plv->ci.hwnd, &rc, TRUE);
        }
    }
}


void ListView_InvalidateSelectedOrCutOwnerData(LV* plv, ILVRange *plvrangeSel)
{
    UINT rdwFlags = RDW_INVALIDATE;
    int cItem = ListView_Count(plv);
    DWORD dwType = plv->wView;
    int i;
    RECT rcView;

    ASSERT(ListView_IsOwnerData(plv));
    ASSERT(plv);

    GetClientRect(plv->ci.hwnd, &rcView);

    if (plv->clrTextBk == CLR_NONE
        || (plv->himl && (plv->clrBk != ImageList_GetBkColor(plv->himl)))) 
    {
        // always do an erase, otherwise the text background won't paint right
        rdwFlags |= RDW_ERASE;
    }

    // calculate start of items and end of items visible on the view
    //
    switch (dwType)
    {
    case LV_VIEW_DETAILS:
        i = ListView_RYHitTest(plv, rcView.top);
        cItem = ListView_RYHitTest(plv, rcView.bottom) + 1;
        break;

    case LV_VIEW_LIST:
      i = ListView_LCalcViewItem(plv, rcView.left, rcView.top);
      cItem = ListView_LCalcViewItem(plv, rcView.right, rcView.bottom) + 1;
        break;

   default:
        ListView_CalcMinMaxIndex(plv, &rcView, &i, &cItem);
        break;
    }

    i = max(i, 0);

    cItem = min(ListView_Count(plv), cItem);
    if (cItem > i)
    {
        ListView_NotifyCacheHint(plv, i, cItem-1);
    }

    for (; i < cItem; i++)
    {
        if (plvrangeSel->lpVtbl->IsSelected(plvrangeSel, i) == S_OK)
        {
            ListView_InvalidateItem(plv, i, FALSE, rdwFlags);
        }
    }
}

void ListView_RedrawSelection(LV* plv)
{
    if (ListView_IsOwnerData(plv)) 
    {
        ListView_InvalidateSelectedOrCutOwnerData(plv, plv->plvrangeSel);
    }
    else 
    {

        int i = -1;

        while ((i = ListView_OnGetNextItem(plv, i, LVNI_SELECTED)) != -1)
        {
            ListView_InvalidateItem(plv, i, TRUE, RDW_INVALIDATE | RDW_ERASE);
        }


        if (ListView_IsReportView(plv)) 
        {
            int iEnd = ListView_RYHitTest(plv, plv->sizeClient.cy) + 1;

            iEnd = min(iEnd, ListView_Count(plv));

            // if we're in report mode, sub items may have selection focus
            for (i = ListView_RYHitTest(plv, 0); i < iEnd; i++) 
            {
                int iCol;

                for (iCol = 1; iCol < plv->cCol; iCol++) 
                {
                    LISTSUBITEM lsi;
                    ListView_GetSubItem(plv, i, iCol, &lsi);
                    if (lsi.state & LVIS_SELECTED) 
                    {
                        ListView_InvalidateItem(plv, i, FALSE, RDW_INVALIDATE | RDW_ERASE);
                    }
                    break;
                }
            }
        }
    }

    UpdateWindow(plv->ci.hwnd);
}

void ListView_OnSetFocus(LV* plv, HWND hwndOldFocus)
{
    ASSERT(gcWheelDelta == 0);

    // due to the way listview call SetFocus on themselves on buttondown,
    // the window can get a strange sequence of focus messages: first
    // set, then kill, and then set again.  since these are not really
    // focus changes, ignore them and only handle "real" cases.
    //
    // But still send out the accessibility notification because USER
    // has already pushed focus back to the listview instead of to the
    // focus item.

    if (hwndOldFocus == plv->ci.hwnd)
    {
        ListView_NotifyFocusEvent(plv);
        return;
    }

    plv->flags |= ListView_HideLabels(plv) ? LVF_FOCUSED : LVF_FOCUSED | LVF_UNFOLDED;
    if (IsWindowVisible(plv->ci.hwnd))
    {
        if (plv->iFocus != -1)
        {
            ListView_InvalidateItem(plv, plv->iFocus, TRUE, RDW_INVALIDATE | RDW_ERASE);
            ListView_NotifyFocusEvent(plv);
        }

        ListView_RedrawSelection(plv);
    }

    // Let the parent window know that we are getting the focus.
    CCSendNotify(&plv->ci, NM_SETFOCUS, NULL);
}

void ListView_OnKillFocus(LV* plv, HWND hwndNewFocus)
{
    // Reset wheel scroll amount
    gcWheelDelta = 0;

    // due to the way listview call SetFocus on themselves on buttondown,
    // the window can get a strange sequence of focus messages: first
    // set, then kill, and then set again.  since these are not really
    // focus changes, ignore them and only handle "real" cases.
    if (!plv || hwndNewFocus == plv->ci.hwnd)
        return;

    ListView_CancelTipTrack(plv);

    plv->flags &= ~(LVF_FOCUSED|LVF_UNFOLDED);

    // Blow this off if we are not currently visible (being destroyed!)
    if (IsWindowVisible(plv->ci.hwnd))
    {
        if (plv->iFocus != -1)
        {
            UINT fRedraw = RDW_INVALIDATE;
            if (plv->clrTextBk == CLR_NONE || plv->fListviewShadowText)
                fRedraw |= RDW_ERASE;
            ListView_InvalidateFoldedItem(plv, plv->iFocus, TRUE, fRedraw);
        }
        ListView_RedrawSelection(plv);
    }

    // Let the parent window know that we are losing the focus.
    CCSendNotify(&plv->ci, NM_KILLFOCUS, NULL);
    IncrementSearchString(&plv->is, 0, NULL);
}

void ListView_DeselectAll(LV* plv, int iDontDeselect)
{
    int i = -1;
    int nSkipped = 0;
    BOOL fWasSelected = FALSE;

    if (iDontDeselect != -1) 
    {
        if (ListView_OnGetItemState(plv, iDontDeselect, LVIS_SELECTED))
            fWasSelected = TRUE;
    }

    if (ListView_IsOwnerData(plv)) 
    {

        // if there's only one item selected, and that item is the iDontDeselect
        // then our work is done...
        plv->plvrangeSel->lpVtbl->CountIncluded(plv->plvrangeSel, &plv->nSelected);
        if (plv->nSelected == 1 && fWasSelected)
            return;

        ListView_InvalidateSelectedOrCutOwnerData(plv, plv->plvrangeSel);

        ListView_OnSetItemState(plv, -1, 0, LVIS_SELECTED);
        if (fWasSelected) 
        {
            ListView_OnSetItemState(plv, iDontDeselect, LVIS_SELECTED, LVIS_SELECTED);
            nSkipped = 1;
        }

    } 
    else
    {
       if (iDontDeselect != plv->iFocus)
       {
           ListView_OnSetItemState(plv, plv->iFocus, 0, LVIS_SELECTED);
       }

       while ((plv->nSelected - nSkipped) && (i = ListView_OnGetNextItem(plv, i, LVNI_SELECTED)) != -1) 
       {
           if (i != iDontDeselect)
           {
               ListView_OnSetItemState(plv, i, 0, LVIS_SELECTED);
           } 
           else
           {
               if (fWasSelected) 
               {
                   nSkipped++;
               }
           }
       }
    }

    RIPMSG((plv->nSelected - nSkipped) == 0, "ListView_DeselectAll: Do not refuse a deselect when telling listview to Deselect all.");
    plv->nSelected = nSkipped;
}

// toggle the selection state of an item

void ListView_ToggleSelection(LV* plv, int iItem)
{
    UINT cur_state;
    if (iItem != -1)
    {
        cur_state = ListView_OnGetItemState(plv, iItem, LVIS_SELECTED);
        ListView_OnSetItemState(plv, iItem, cur_state ^ LVIS_SELECTED, LVIS_SELECTED);
    }
}

// Selects (or toggles) a range of items in the list.
//      The curent iFocus is the starting location
//      iItem - is the ending item
//      fToggle - Well set all of the selection state of all of the items to
//          inverse the starting location
//
void ListView_SelectRangeTo(LV* plv, int iItem, BOOL fResetRest)
{
    int iMin, iMax;
    int i = -1;
    UINT uSelVal = LVIS_SELECTED;

    if (plv->iMark == -1)
    {
        ListView_SetFocusSel(plv, iItem, TRUE, TRUE, FALSE);
        return;
    }

    if (!fResetRest)
        uSelVal = ListView_OnGetItemState(plv, plv->iMark, LVIS_SELECTED);

    // If we are in report view or list view we simply walk through the
    // indexes to see which items to select or deselect. otherwise it
    // is is based off of the location of the objects being within the
    // rectangle that is defined by
    if (ListView_IsListView(plv) || (ListView_IsReportView(plv) && !plv->fGroupView))
    {
        iMin = min(iItem, plv->iMark);
        iMax = max(iItem, plv->iMark);

        if (ListView_IsOwnerData(plv)) 
        {
            if (fResetRest)
            {
                ListView_DeselectAll(plv, -1);
            }

            if (iMax > iMin)
            {
                if (LVIS_SELECTED & uSelVal)
                {
                    if (FAILED(plv->plvrangeSel->lpVtbl->IncludeRange(plv->plvrangeSel, iMin, iMax)))
                        return;
                }
                else
                {
                    if (FAILED(plv->plvrangeSel->lpVtbl->ExcludeRange(plv->plvrangeSel, iMin, iMax)))
                        return;
                }
                ListView_SendODChangeAndInvalidate(plv, iMin, iMax, uSelVal ^ LVIS_SELECTED, uSelVal);
            }
            else
            {
                ListView_OnSetItemState(plv, iMin, uSelVal, LVIS_SELECTED);
            }
        }
        else
        {
            if (fResetRest)
            {
                while ((i = ListView_OnGetNextItem(plv, i, LVNI_SELECTED)) != -1)
                {
                    if (i < iMin || i > iMax)
                        ListView_OnSetItemState(plv, i, 0, LVIS_SELECTED);
                }
            }

            while (iMin <= iMax)
            {
                ListView_OnSetItemState(plv, iMin, uSelVal, LVIS_SELECTED);
                iMin++;
            }
        }
    }
    else
    {
        RECT    rcTemp;
        RECT    rcTemp2;
        RECT    rcBounding;
        int iFirstItem = (plv->iMark < iItem)? plv->iMark: iItem;
        int iSecondItem = (plv->iMark > iItem)? plv->iMark: iItem;

        ListView_GetRects(plv, iFirstItem, QUERY_DEFAULT, NULL, NULL, NULL, &rcTemp);
        ListView_GetRects(plv, iSecondItem, QUERY_DEFAULT, NULL, NULL, NULL, &rcTemp2);
        UnionRect(&rcBounding, &rcTemp, &rcTemp2);
        ListView_CalcMinMaxIndex(plv, &rcBounding, &iMin, &iMax);

        if (ListView_IsOwnerData(plv) && (iMax > iMin))
        {
            if (fResetRest)
            {
                ListView_DeselectAll(plv, -1);
            }

            iMax = min(iMax, ListView_Count(plv));
            iMin = max(iMin, 0);

            if (LVIS_SELECTED & uSelVal)
            {
                if (FAILED(plv->plvrangeSel->lpVtbl->IncludeRange(plv->plvrangeSel, iMin, iMax - 1)))
                    return;
            }
            else
            {
                if (FAILED(plv->plvrangeSel->lpVtbl->ExcludeRange(plv->plvrangeSel, iMin, iMax - 1)))
                    return;
            }

            ListView_SendODChangeAndInvalidate(plv, iMin, iMax, uSelVal ^ LVIS_SELECTED, uSelVal);

        } 
        else 
        {
            int iZ;
            POINT pt;
            RECT rcItem;
    
            for (i = 0; i < ListView_Count(plv); i++)
            {
                ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, NULL, NULL, &rcItem);
                pt.x = (rcItem.right + rcItem.left) / 2;  // center of item
                pt.y = (rcItem.bottom + rcItem.top) / 2;

                // Is the item within the y bound of the first and last item?
                if (pt.y > rcTemp.top &&
                    pt.y < rcTemp2.bottom)
                {
                    // Yes. Check to see if the item is in the first row.
                    if (pt.y < rcTemp.bottom)
                    {
                        // It is. Then check to see if it's before the first item in that row.
                        if (pt.x < rcTemp.left)
                        {
                            // It is. Then this item is not to be selected.
                            if (fResetRest)
                                ListView_OnSetItemState(plv, i, 0, LVIS_SELECTED);

                            // Continue to the next item
                            continue;
                        }

                    }

                    // Is the item in the last row?
                    if (pt.y > rcTemp2.top)
                    {
                        // Yes. Is it after the last item in the selection?
                        if (pt.x > rcTemp2.right)
                        {
                            // It is. Then this item is not to be selected.
                            if (fResetRest)
                                ListView_OnSetItemState(plv, i, 0, LVIS_SELECTED);

                            // Continue to the next item
                            continue;
                        }
                    }

                    // The item is in the selection range. Go ahead and select it

                    if (!ListView_IsOwnerData(plv))
                    {
                      iZ = ListView_ZOrderIndex(plv, i);

                      if (iZ > 0)
                          DPA_InsertPtr(plv->hdpaZOrder, 0, DPA_DeletePtr(plv->hdpaZOrder, iZ));
                    }

                    ListView_OnSetItemState(plv, i, uSelVal, LVIS_SELECTED);
                }
                else if (fResetRest)
                    ListView_OnSetItemState(plv, i, 0, LVIS_SELECTED);
            }
        }
    }
}

// makes an item the focused item and optionally selects it
//
// in:
//      iItem           item to get the focus
//      fSelectAlso     select this item as well as set it as the focus
//      fDeselectAll    deselect all items first
//      fToggleSel      toggle the selection state of the item
//
// returns:
//      index of focus item (if focus change was refused)

int ListView_SetFocusSel(LV* plv, int iItem, BOOL fSelectAlso, BOOL fDeselectAll, BOOL fToggleSel)
{
    int iFocus = plv->iFocus;
    
    // if we're single sel mode, don't bother with this because
    // the set item will do it for us
    if (!(plv->ci.style & LVS_SINGLESEL) && (fDeselectAll))
        ListView_DeselectAll(plv, -1);
    
    if (iItem != plv->iFocus)
    {
        // remove the old focus
        if (plv->iFocus != -1)
        {
            // If he refuses to give up the focus, bail out.
            if (!ListView_OnSetItemState(plv, plv->iFocus, 0, LVIS_FOCUSED))
                return plv->iFocus;
        }
    }
    
    if (!ListView_IsOwnerData(plv))
    {
        
        if (fSelectAlso)
        {
            if (ListView_IsIconView(plv) || ListView_IsSmallView(plv) || ListView_IsTileView(plv))
            {
                int iZ = ListView_ZOrderIndex(plv, iItem);
                
                if (iZ > 0)
                    DPA_InsertPtr(plv->hdpaZOrder, 0, DPA_DeletePtr(plv->hdpaZOrder, iZ));
            }
        }
    }
    
    /* Ensure that when moving focus that we refresh the previous focus
    owner properly. */
    
    if (iFocus != -1 && iFocus != plv->iFocus && (plv->flags & LVF_UNFOLDED))
        ListView_InvalidateFoldedItem(plv, iFocus, FALSE, RDW_INVALIDATE);
    
    if (plv->iMark == -1)
        plv->iMark = iItem;
    
    SetTimer(plv->ci.hwnd, IDT_SCROLLWAIT, GetDoubleClickTime(), NULL);
    plv->flags |= LVF_SCROLLWAIT;
    
    if (fToggleSel)
    {
        ListView_ToggleSelection(plv, iItem);
        ListView_OnSetItemState(plv, iItem, LVIS_FOCUSED, LVIS_FOCUSED);
    }
    else
    {
        UINT flags = ((fSelectAlso || plv->ci.style & LVS_SINGLESEL) ?
            (LVIS_SELECTED | LVIS_FOCUSED) : LVIS_FOCUSED);
        ListView_OnSetItemState(plv, iItem, flags, flags);
    }
    
    return iItem;
}

UINT GetLVKeyFlags()
{
    UINT uFlags = 0;

    if (GetKeyState(VK_MENU) < 0)
        uFlags |= LVKF_ALT;
    if (GetKeyState(VK_CONTROL) < 0)
        uFlags |= LVKF_CONTROL;
    if (GetKeyState(VK_SHIFT) < 0)
        uFlags |= LVKF_SHIFT;

    return uFlags;
}

void ListView_OnKey(LV* plv, UINT vk, BOOL fDown, int cRepeat, UINT flags)
{
    UINT lvni = 0;
    int iNewFocus;
    BOOL fCtlDown;
    BOOL fShiftDown;
    LV_KEYDOWN nm;
    HWND hwnd = plv->ci.hwnd;

    if (!fDown)
        return;

    // Cancel manual tip track if any key is pressed
    ListView_CancelTipTrack(plv);

    // Swap the left and right arrow key if the control is mirrored.
    vk = RTLSwapLeftRightArrows(&plv->ci, vk);

    //prevent any change in selected items before the dbl click timer goes off
    //so that we don't launch wrong item(s)
    if (plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickHappened && plv->fOneClickOK)
    {
        //if a key is pressed with a mouse click with one click activate and double click
        //timer, we end up setting up a timer and then processing the keydown
        //this causes an item to be launched right away (from this code) and in case
        //of return being pressed it causes double activation
        //prevent these cases:
        if (vk == VK_SHIFT || vk == VK_CONTROL || vk == VK_MENU || vk == VK_RETURN)
            return;
        KillTimer(plv->ci.hwnd, IDT_ONECLICKHAPPENED);
        plv->fOneClickHappened = FALSE;
        CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &(plv->nmOneClickHappened.hdr));
        if (!IsWindow(hwnd))
            return;
    }

    // Notify
    nm.wVKey = (WORD) vk;
    nm.flags = flags;
    if (CCSendNotify(&plv->ci, LVN_KEYDOWN, &nm.hdr))
    {
        plv->iPuntChar++;
        return;
    } 
    else if (plv->iPuntChar)
    {
        // this is tricky...  if we want to punt the char, just increment the
        // count.  if we do NOT, then we must clear the queue of WM_CHAR's
        // this is to preserve the iPuntChar to mean "punt the next n WM_CHAR messages
        MSG msg;
        while(plv->iPuntChar && PeekMessage(&msg, plv->ci.hwnd, WM_CHAR, WM_CHAR, PM_REMOVE))
        {
            plv->iPuntChar--;
        }
        ASSERT(!plv->iPuntChar);
    }

    if (ListView_Count(plv) == 0)   // don't blow up on empty list
        return;

    fCtlDown = GetKeyState(VK_CONTROL) < 0;
    fShiftDown = GetKeyState(VK_SHIFT) < 0;

    switch (vk)
    {
    case VK_SPACE:
        // If shift (extend) or control (disjoint) select,
        // then toggle selection state of focused item.
        if (fCtlDown)
        {
            plv->iMark = plv->iFocus;
            ListView_ToggleSelection(plv, plv->iFocus);
            plv->iPuntChar++;
        }

        if (fShiftDown) 
        {
            ListView_SelectRangeTo(plv, plv->iFocus, TRUE);
        }

        if (ListView_CheckBoxes(plv))
        {
            if (plv->iFocus != -1)
                ListView_HandleStateIconClick(plv, plv->iFocus);

            if (ListView_IsSimpleSelect(plv))
            {
                int iToggle = -1;
                while ((iToggle = ListView_OnGetNextItem(plv, iToggle, LVNI_SELECTED)) != -1)
                {
                    if (plv->iFocus != iToggle)
                    {
                        ListView_HandleStateIconClick(plv, iToggle);
                    }
                }
            }
        }
        //notify of navigation key usage
        CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
        return;

    case VK_RETURN:
        CCSendNotify(&plv->ci, NM_RETURN, NULL);

        /// some (comdlg32 for example) destroy on double click
        // we need to bail if that happens because plv is no longer valid
        if (!IsWindow(hwnd))
            return;

        {
            NMITEMACTIVATE nm;

            nm.iItem = plv->iFocus;
            nm.iSubItem = 0;
            nm.uChanged = 0;
            nm.ptAction.x = -1;
            nm.ptAction.y = -1;
            nm.uKeyFlags = GetLVKeyFlags();
            CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &nm.hdr);
            if (!IsWindow(hwnd))
                return;
        }
        //notify of navigation key usage
        CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
        return;

    case VK_ADD:
        if (ListView_IsReportView(plv) && (GetKeyState(VK_CONTROL) < 0))
        {
            HCURSOR hcurPrev;
            int i;

            hcurPrev = SetCursor(LoadCursor(NULL, IDC_WAIT));
            for (i=0; i < plv->cCol; i++)
            {
                ListView_RSetColumnWidth(plv, i, -1);
            }

            SetCursor(hcurPrev);
            //notify of navigation key usage
            CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
            return;
        }
    }

    if (GetKeyState(VK_MENU) < 0)
        return;

    // For a single selection listview, disable extending the selection
    // by turning off the keyboard modifiers.
    if (plv->ci.style & LVS_SINGLESEL)
    {
        fCtlDown = FALSE;
        fShiftDown = FALSE;
    }

    //
    // Let the Arrow function attempt to process the key.
    //
    iNewFocus = ListView_Arrow(plv, plv->iFocus, vk);

    // If control (disjoint) selection, don't change selection.
    // If shift (extend) or control selection, don't deselect all.
    //
    if (iNewFocus != -1)
    {
        if (fShiftDown)
        {
            ListView_SelectRangeTo(plv, iNewFocus, TRUE);
            ListView_SetFocusSel(plv, iNewFocus, FALSE, FALSE, FALSE);
        }
        else 
        {
            if (!fCtlDown)
                plv->iMark = iNewFocus;
            ListView_SetFocusSel(plv, iNewFocus, !fCtlDown, !fShiftDown && !fCtlDown, FALSE);
        }
        IncrementSearchString(&plv->is, 0, NULL);
        CCPlaySound(c_szSelect);

        ListView_OnKeyboardSelected(plv, iNewFocus);
    }

    // on keyboard movement, scroll immediately.
    if (ListView_CancelScrollWait(plv)) 
    {
        ListView_OnEnsureVisible(plv, plv->iFocus, FALSE);
        UpdateWindow(plv->ci.hwnd);
    }

    //notify of navigation key usage
    CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
}

//
//  LVN_INCREMENTALSEARCH gives the app the opportunity to customize
//  incremental search.  For example, if the items are numeric,
//  the app can do numerical search instead of string search.
//
//  App sets pnmfi->lvfi.lParam to the result of the incremental search,
//  or to -2 to fai the search and just beep.
//
//  App can return 2 to indicate that all processing should stop, if
//  app wants to take over incremental search completely.
//
BOOL ListView_IncrementalSearch(LV *plv, int iStartFrom, LPNMLVFINDITEM pnmfi, int *pi)
{
    INT_PTR fRc;

    ASSERT(!(pnmfi->lvfi.flags & LVFI_PARAM));
    pnmfi->lvfi.lParam = -1;

    fRc = CCSendNotify(&plv->ci, LVN_INCREMENTALSEARCH, &pnmfi->hdr);
    *pi = (int)pnmfi->lvfi.lParam;

    // Cannot just return fRc because some apps return 1 to all WM_NOTIFY's
    return fRc == 2;
}

// Now only Korean version is interested in incremental search with composition string.
LPTSTR GET_COMP_STRING(HIMC hImc, DWORD dwFlags)
{
    LONG iNumComp;
    PTSTR pszCompStr;
    iNumComp = ImmGetCompositionString(hImc, dwFlags, NULL, 0);
    pszCompStr = (PTSTR)LocalAlloc(LPTR, sizeof(TCHAR)*(iNumComp+1));
    if (pszCompStr)
    {
        if (iNumComp)
            ImmGetCompositionString(hImc, dwFlags, pszCompStr, iNumComp+1);
        pszCompStr[iNumComp] = TEXT('\0');
    }
    return pszCompStr;
}

#define FREE_COMP_STRING(pszCompStr)    LocalFree((HLOCAL)(pszCompStr))

BOOL ListView_OnImeComposition(LV* plv, WPARAM wParam, LPARAM lParam)
{
    LPTSTR lpsz;
    NMLVFINDITEM nmfi;
    int i;
    int iStartFrom = -1;
    int iLen;
    int iCount;
    HIMC hImc;
    TCHAR *pszCompStr;
    BOOL fRet = TRUE;

    iCount = ListView_Count(plv);

    if (!iCount || plv->iFocus == -1)
        return fRet;

    if (hImc = ImmGetContext(plv->ci.hwnd))
    {
        if (lParam & GCS_RESULTSTR)
        {
            fRet = FALSE;
            pszCompStr = GET_COMP_STRING(hImc, GCS_RESULTSTR);
            if (pszCompStr)
            {
                IncrementSearchImeCompStr(&plv->is, FALSE, pszCompStr, &lpsz);
                FREE_COMP_STRING(pszCompStr);
            }
        }
        if (lParam & GCS_COMPSTR)
        {
            fRet = TRUE;
            pszCompStr = GET_COMP_STRING(hImc, GCS_COMPSTR);
            if (pszCompStr)
            {
                if (IncrementSearchImeCompStr(&plv->is, TRUE, pszCompStr, &lpsz))
                    iStartFrom = plv->iFocus;
                else
                    iStartFrom = ((plv->iFocus - 1) + iCount)% iCount;

                nmfi.lvfi.flags = LVFI_SUBSTRING | LVFI_STRING | LVFI_WRAP;
                nmfi.lvfi.psz = lpsz;
                iLen = lstrlen(lpsz);

                // special case space as the first character
                if ((iLen == 1) && (*lpsz == TEXT(' '))) 
                {
                    if (plv->iFocus != -1)
                    {
                        ListView_OnSetItemState(plv, plv->iFocus, LVIS_SELECTED, LVIS_SELECTED);
                        IncrementSearchString(&plv->is, 0, NULL);
                    }
                    //notify of navigation key usage
                    CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
                    return fRet;
                }

                // Give caller full string in case they want to do something custom
                if (ListView_IncrementalSearch(plv, iStartFrom, &nmfi, &i))
                    return fRet;

                if (iLen > 0 && SameChars(lpsz, lpsz[0])) 
                {
                    //  The user has been typing the same char over and over again.
                    //  Switch from incremental search to Windows 3.1 style search.
                    iStartFrom = plv->iFocus;
                    nmfi.lvfi.psz = lpsz + iLen - 1;
                }

                if (i == -1)
                    i = ListView_OnFindItem(plv, iStartFrom, &nmfi.lvfi);

                if (!ListView_IsValidItemNumber(plv, i))
                {
                    i = -1;
                }

                TraceMsg(TF_LISTVIEW, "CIme listsearch %d %s %d", (LPTSTR)lpsz, (LPTSTR)lpsz, i);

                if (i != -1)
                {
                    ListView_SetFocusSel(plv, i, TRUE, TRUE, FALSE);
                    plv->iMark = i;
                    if (ListView_CancelScrollWait(plv))
                            ListView_OnEnsureVisible(plv, i, FALSE);
                } 
                else 
                {
                    // Don't beep on spaces, we use it for selection.
                    IncrementSearchBeep(&plv->is);
                }

                //notify of navigation key usage
                CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
                FREE_COMP_STRING(pszCompStr);
            }
        }
        ImmReleaseContext(plv->ci.hwnd, hImc);
    }
    return fRet;
}

// REVIEW: We will want to reset ichCharBuf to 0 on certain conditions,
// such as: focus change, ENTER, arrow key, mouse click, etc.
//
void ListView_OnChar(LV* plv, UINT ch, int cRepeat)
{
    LPTSTR lpsz;
    NMLVFINDITEM nmfi;
    int i;
    int iStartFrom = -1;
    int iLen;
    int iCount;

    iCount = ListView_Count(plv);

    if (!iCount)
        return;

    // Don't search for chars that cannot be in a file name (like ENTER and TAB)
    // The Polish keyboard layout uses CTRL+ALT to
    // enter some normal letters, so don't punt if the CTRL key is down or
    // people in Poland are in trouble!  We need to fix this. NTRAID 5262.
    if (ch < TEXT(' '))// || GetKeyState(VK_CONTROL) < 0)
    {
        IncrementSearchString(&plv->is, 0, NULL);
        return;
    }

    if (IncrementSearchString(&plv->is, ch, &lpsz))
        iStartFrom = plv->iFocus;
    else
        iStartFrom = ((plv->iFocus - 1) + iCount)% iCount;

    nmfi.lvfi.flags = LVFI_SUBSTRING | LVFI_STRING | LVFI_WRAP;
    nmfi.lvfi.psz = lpsz;
    iLen = lstrlen(lpsz);

    // special case space as the first character
    if ((iLen == 1) && (*lpsz == ' ')) 
    {
        if (plv->iFocus != -1) 
        {
            ListView_OnSetItemState(plv, plv->iFocus, LVIS_SELECTED, LVIS_SELECTED);
            IncrementSearchString(&plv->is, 0, NULL);
        }
        //notify of navigation key usage
        CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
        return;
    }

    // Give caller full string in case they want to do something custom
    if (ListView_IncrementalSearch(plv, iStartFrom, &nmfi, &i))
        return;

    if (iLen > 0 && SameChars(lpsz, lpsz[0])) 
    {
        //
        //  The user has been typing the same char over and over again.
        //  Switch from incremental search to Windows 3.1 style search.
        //
        iStartFrom = plv->iFocus;
        nmfi.lvfi.psz = lpsz + iLen - 1;
    }

    if (i == -1)
        i = ListView_OnFindItem(plv, iStartFrom, &nmfi.lvfi);

    if (!ListView_IsValidItemNumber(plv, i)) 
    {
        i = -1;
    }

    TraceMsg(TF_LISTVIEW, "listsearch %d %s %d", (LPTSTR)lpsz, (LPTSTR)lpsz, i);

    if (i != -1) 
    {
        ListView_SetFocusSel(plv, i, TRUE, TRUE, FALSE);
        plv->iMark = i;
        if (ListView_CancelScrollWait(plv))
            ListView_OnEnsureVisible(plv, i, FALSE);
    } 
    else 
    {
        // Don't beep on spaces, we use it for selection.
        IncrementSearchBeep(&plv->is);
    }

    //notify of navigation key usage
    CCNotifyNavigationKeyUsage(&(plv->ci), UISF_HIDEFOCUS);
}

BOOL SameChars(LPTSTR lpsz, TCHAR c)
{
    while (*lpsz)
    {
        if (*lpsz++ != c)
            return FALSE;
    }
    return TRUE;
}

UINT ListView_OnGetDlgCode(LV* plv, MSG* lpmsg)
{
    return DLGC_WANTARROWS | DLGC_WANTCHARS;
}

int ListView_ComputeCXItemSize(LV* plv)
{
    int cxItem;

    cxItem = 16 * plv->cxLabelChar + plv->cxSmIcon;
    if (cxItem == 0)
    {
        cxItem = g_cxBorder;
    }

    ASSERT(cxItem != 0);
    return cxItem;
}

int ListView_ComputeCYItemSize(LV* plv)
{
    int cyItem;

    cyItem = max(plv->cyLabelChar, plv->cySmIcon);

    if (plv->himlState)
    {
        cyItem = max(cyItem, plv->cyState);
    }

    cyItem += g_cyBorder;

    ASSERT(cyItem != 0);
    return cyItem;
}

void ListView_InvalidateCachedLabelSizes(LV* plv)
{
    int i;

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    // Label wrapping has changed, so we need to invalidate the
    // size of the items, such that they will be recomputed.
    //
    if (!ListView_IsOwnerData(plv))
    {
        for (i = ListView_Count(plv) - 1; i >= 0; i--)
        {
            LISTITEM* pitem = ListView_FastGetItemPtr(plv, i);
            ListView_SetSRecompute(pitem);
        }
    }
    plv->rcView.left = RECOMPUTE;

    if ((plv->ci.style & LVS_OWNERDRAWFIXED) && ListView_IsReportView(plv))
        plv->cyItemSave = ListView_ComputeCYItemSize(plv);
    else
    {
        plv->cyItem = ListView_ComputeCYItemSize(plv);
    }
}


void ListView_OnStyleChanging(LV* plv, UINT gwl, LPSTYLESTRUCT pinfo)
{
    if (gwl == GWL_STYLE) 
    {
        // Don't allow LVS_OWNERDATA to change after creation
        DWORD stylePreserve = LVS_OWNERDATA;

        // Don't allow a LVS_EX_REGIONAL listview to change type, since
        // it must be LVS_ICON
        // Similarly, HideLabels only works in large icon mode so keep the type.
        if ((plv->exStyle & LVS_EX_REGIONAL) || ListView_HideLabels(plv))
            stylePreserve |= LVS_TYPEMASK;

        // Preserve the bits that must be preserved
        pinfo->styleNew ^= (pinfo->styleNew ^ pinfo->styleOld) & stylePreserve;

        // If we're in group view, then listview must be in autoarrange
        if (plv->fGroupView)
        {
            pinfo->styleNew |= LVS_AUTOARRANGE;
        }

    }
}

WORD MapViewStyle(DWORD style)
{
    if (style == LVS_LIST)
        return LV_VIEW_LIST;
    if (style == LVS_SMALLICON)
        return LV_VIEW_SMALLICON;
    if (style == LVS_REPORT)
        return LV_VIEW_DETAILS;

    return LV_VIEW_ICON;
}

void ListView_OnStyleChanged(LV* plv, UINT gwl, LPSTYLESTRUCT pinfo)
{
    // Style changed: redraw everything...
    //
    // try to do this smartly, avoiding unnecessary redraws
    if (gwl == GWL_STYLE)
    {
        BOOL fRedraw = FALSE, fShouldScroll = FALSE;
        DWORD changeFlags, styleOld;

        ListView_DismissEdit(plv, FALSE);

        changeFlags = plv->ci.style ^ pinfo->styleNew;
        styleOld = plv->ci.style;

        // (dli) Setting the small icon width here and only in the case when we go
        // from large icon view to some other view because of three reasons:
        // 1. According to chee, we want to set this before we change the style bit in
        // plv or after we scale.
        // 2. We don't want to do it after we scale because we want to set the width to
        // the maximum value so that the items in this listview do not cover each other
        // 3. we do it from large icon view because large icon view has fixed width for
        // each item, small icon view width can be scaled.
        //
        if ((changeFlags & LVS_TYPEMASK) && (plv->wView == LV_VIEW_ICON))
            ListView_ISetColumnWidth(plv, 0,
                                     LV_GetNewColWidth(plv, 0, ListView_Count(plv)-1), FALSE);

        plv->ci.style = pinfo->styleNew;        // change our version

        if (changeFlags & (WS_BORDER | WS_CAPTION | WS_THICKFRAME)) 
        {
            // the changing of these bits affect the size of the window
            // but not until after this message is handled
            // so post ourself a message.
            PostMessage(plv->ci.hwnd, LVMP_WINDOWPOSCHANGED, 0, 0);
        }

        if (changeFlags & LVS_NOCOLUMNHEADER)
        {
            if (plv->hwndHdr)
            {
                SetWindowBits(plv->hwndHdr, GWL_STYLE, HDS_HIDDEN,
                              (plv->ci.style & LVS_NOCOLUMNHEADER) ? HDS_HIDDEN : 0);

                fRedraw = TRUE;
                fShouldScroll = TRUE;
            }
        }

        if (changeFlags & LVS_NOLABELWRAP)
        {
            ListView_InvalidateCachedLabelSizes(plv);
            fShouldScroll = TRUE;
            fRedraw = TRUE;
        }

        if (changeFlags & LVS_TYPEMASK)
        {
            WORD wViewOld = plv->wView;
            plv->wView = MapViewStyle(plv->ci.style & LVS_TYPEMASK);
            ListView_TypeChange(plv, wViewOld, (BOOL)BOOLIFY(styleOld & LVS_OWNERDRAWFIXED));
            fShouldScroll = TRUE;
            fRedraw = TRUE;
        }

        if (changeFlags & LVS_AUTOARRANGE)
        {
            if (plv->ci.style & LVS_AUTOARRANGE)
            {
                // Turned on.
                ListView_OnArrange(plv, LVA_DEFAULT);
                fRedraw = TRUE;
            }
            else
            {
                // Turned off. Nuke insertmark, because that's not allowed when
                // auto-arrange is off.
                LVINSERTMARK lvim = {0};
                lvim.cbSize = sizeof(LVINSERTMARK);
                lvim.iItem = -1;
                ListView_OnSetInsertMark(plv, &lvim);
            }
        }

        // previously, this was the else to
        // (changeFlags & LVS_AUTOARRANGE && (plv->ci.style & LVS_AUTOARRANGE))
        // I'm not sure that was really the right thing..
        if (fShouldScroll)
        {
            // Else we would like to make the most important item to still
            // be visible.  So first we will look for a cursorered item
            // if this fails, we will look for the first selected item,
            // else we will simply ask for the first item (assuming the
            // count > 0
            //
            int i;

            // And make sure the scrollbars are up to date Note this
            // also updates some variables that some views need
            ListView_UpdateScrollBars(plv);

            i = (plv->iFocus >= 0) ? plv->iFocus : ListView_OnGetNextItem(plv, -1, LVNI_SELECTED);
            if ((i == -1)  && (ListView_Count(plv) > 0))
                i = 0;

            if (i != -1)
                ListView_OnEnsureVisible(plv, i, TRUE);
        }

        if (fRedraw)
            RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
    }
    else if (gwl == GWL_EXSTYLE)
    {
        //
        // If the RTL_MIRROR extended style bit had changed, let's
        // repaint the control window.
        //
        if ((plv->ci.dwExStyle&RTL_MIRRORED_WINDOW) !=  (pinfo->styleNew&RTL_MIRRORED_WINDOW))
            RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);

        // Save the new ex-style bits
        plv->ci.dwExStyle = pinfo->styleNew;
    }

    // Change of styles also changes tooltip policy, so pop it
    ListView_PopBubble(plv);
}

void ListView_TypeChange(LV* plv, WORD wViewOld, BOOL fOwnerDrawFixed)
{
    RECT rc;
    int i;
    //
    //  Invalidate all cached string metrics because customdraw clients
    //  may draw differently depending on the type.  This happens more
    //  often than you might think, not on purpose, but because apps are
    //  buggy.
    //
    if (!ListView_IsOwnerData(plv))
    {
        for (i = 0; i < ListView_Count(plv); i++)
        {
            LISTITEM *pitem = ListView_FastGetItemPtr(plv, i);
            ListView_SetSRecompute(pitem);
        }
    }

    switch (wViewOld)
    {
    case LV_VIEW_DETAILS:
        ShowWindow(plv->hwndHdr, SW_HIDE);
        if (fOwnerDrawFixed) 
        {
            // swap cyItem and cyFixed;
            int temp = plv->cyItem;
            plv->cyItem = plv->cyItemSave;
            plv->cyItemSave = temp;
        }
        break;

    default:
        break;
    }

    plv->ptOrigin.x = 0;
    plv->ptOrigin.y = 0;
    plv->ptlRptOrigin.x = 0;
    plv->ptlRptOrigin.y = 0;
    plv->rcView.left = RECOMPUTE;

    _ListView_RecomputeEx(plv, NULL, 0, TRUE);

    // Now handle any special setup needed for the new view
    switch (plv->wView)
    {
    case LV_VIEW_LIST:
        // We may need to resize the columns
        ListView_MaybeResizeListColumns(plv, 0, ListView_Count(plv)-1);
        break;

    case LV_VIEW_DETAILS:
        // if it's owner draw fixed, we may have to do funky stuff
        if (wViewOld != LV_VIEW_DETAILS) 
        {
            plv->cyItemSave = plv->cyItem;
        }
        ListView_RInitialize(plv, FALSE);
        break;

    default:
        break;
    }

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    GetClientRect(plv->ci.hwnd, &rc);
    plv->sizeClient.cx = rc.right;
    plv->sizeClient.cy = rc.bottom;
}

int ListView_OnHitTest(LV* plv, LV_HITTESTINFO* pinfo)
{
    UINT flags;
    int x, y;

    if (!pinfo) return -1;

    x = pinfo->pt.x;
    y = pinfo->pt.y;

    pinfo->iItem = -1;
    flags = 0;
    if (x < 0)
        flags |= LVHT_TOLEFT;
    else if (x >= plv->sizeClient.cx)
        flags |= LVHT_TORIGHT;
    if (y < 0)
        flags |= LVHT_ABOVE;
    else if (y >= plv->sizeClient.cy)
        flags |= LVHT_BELOW;

    if (flags == 0)
    {
        pinfo->iItem = _ListView_ItemHitTest(plv, x, y, &flags, NULL);
    }

    pinfo->flags = flags;

    if (pinfo->iItem >= ListView_Count(plv))
    {
        pinfo->iItem = -1;
        pinfo->flags = LVHT_NOWHERE;
    }
    return pinfo->iItem;
}

int ScrollAmount(int large, int iSmall, int unit)
{

    return (((large - iSmall) + (unit - 1)) / unit) * unit;
}

// NOTE: this is duplicated in shell32.dll
//
// checks to see if we are at the end position of a scroll bar
// to avoid scrolling when not needed (avoid flashing)
//
// in:
//      code        SB_VERT or SB_HORZ
//      bDown       FALSE is up or left
//                  TRUE  is down or right
BOOL CanScroll(LV* plv, int code, BOOL bDown)
{
    SCROLLINFO si;

    si.cbSize = sizeof(SCROLLINFO);
    si.fMask = SIF_RANGE | SIF_PAGE | SIF_POS;

    if (ListView_GetScrollInfo(plv, code, &si))
    {
        if (bDown)
        {
            if (si.nPage)
                si.nMax -= (si.nPage - 1);
            return si.nPos < si.nMax;
        }
        else
        {
            return si.nPos > si.nMin;
        }
    }
    else
    {
        return FALSE;
    }
}

// detect if we should auto scroll the window
//
// in:
//      pt  cursor pos in hwnd's client coords
// out:
//      pdx, pdy ammount scrolled in x and y
//
// REVIEW, this should make sure a certain amount of time has passed
// before scrolling.

void ScrollDetect(LV* plv, POINT pt, int *pdx, int *pdy)
{
    int dx, dy;

    *pdx = *pdy = 0;

    if (!(plv->ci.style & (WS_HSCROLL | WS_VSCROLL)))
        return;

    dx = dy = plv->cyIcon / 16;
    if (ListView_IsReportView(plv)) 
    {
        if (!plv->fGroupView)       // Groupview is always in pixels
            dy = plv->cyItem;       // we scroll in units of items...

        if (!dx)
            dx = plv->cxSmIcon;
    }


    if (ListView_IsListView(plv))
        dx = plv->cxItem;

    if (!dx)
        dx = 1;

    if (!dy)
        dy = 1;

    // we need to check if we can scroll before acutally doing it
    // since the selection rect is adjusted based on how much
    // we scroll by

    if (plv->ci.style & WS_VSCROLL) // scroll vertically?
    { 

        if (pt.y >= plv->sizeClient.cy) 
        {
            if (CanScroll(plv, SB_VERT, TRUE))
                *pdy = ScrollAmount(pt.y, plv->sizeClient.cy, dy);   // down
        }
        else if (pt.y <= 0) 
        {
            if (CanScroll(plv, SB_VERT, FALSE))
                *pdy = -ScrollAmount(0, pt.y, dy);     // up
        }
    }

    if (plv->ci.style & WS_HSCROLL) // horizontally
    { 
        if (pt.x >= plv->sizeClient.cx) 
        {
            if (CanScroll(plv, SB_HORZ, TRUE))
                *pdx = ScrollAmount(pt.x, plv->sizeClient.cx, dx);    // right
        } 
        else if (pt.x <= 0) 
        {
            if (CanScroll(plv, SB_HORZ, FALSE))
                *pdx = -ScrollAmount(0, pt.x, dx);    // left
        }
    }

    // REARCHITECT: this will potentially scroll outside the bounds of the
    // listview.  we should bound the scroll amount in CanScroll()
    // or ScrollAmount().

    if (*pdx || *pdy)
    {
        ListView_ValidateScrollParams(plv, pdx, pdy);
    }
}

#define swap(pi1, pi2) {int i = *(pi1) ; *(pi1) = *(pi2) ; *(pi2) = i ;}

void OrderRect(RECT *prc)
{
    if (prc->left > prc->right)
        swap(&prc->left, &prc->right);

    if (prc->bottom < prc->top)
        swap(&prc->bottom, &prc->top);
}

// in:
//      x, y    starting point in client coords

#define SCROLL_FREQ     (GetDoubleClickTime()/2)     // 1/5 of a second between scrolls

BOOL ShouldScroll(LV* plv, LPPOINT ppt, LPRECT lprc)
{
    ASSERT(ppt);

    if (plv->ci.style & WS_VSCROLL)
    {
        if (ppt->y >= lprc->bottom)
        {
            if (CanScroll(plv, SB_VERT, TRUE))
                return TRUE;
        }
        else if (ppt->y <= lprc->top)
        {
            if (CanScroll(plv, SB_VERT, FALSE))
                return TRUE;
        }
    }

    if (plv->ci.style & WS_HSCROLL)
    {
        if (ppt->x >= lprc->right)
        {
            if (CanScroll(plv, SB_HORZ, TRUE))
                return TRUE;
        }
        else if (ppt->x <= lprc->left)
        {
            if (CanScroll(plv, SB_HORZ, FALSE))
                return TRUE;
        }
    }

    return FALSE;
}

// Listview is "Alpha Capable" if:
//      Colors >= 16bpp  (Needed for alpha)
//      The Listview is double buffered (Needed for flicker)
//      The use has "Show window contents while dragging"  (Needed to turn off on slow machines)
//          NOTE: g_fDragFullWindows is turned off in comctl32 when running a remote session
BOOL ListView_IsAlphaMarqueeCapable(LV* plv)
{
    BOOL fAlphaCapable = FALSE;
    if (ListView_IsDoubleBuffer(plv))
    {
        if (AreAllMonitorsAtLeast(16))
        {
            fAlphaCapable = plv->fListviewAlphaSelect;
        }
    }

    return fAlphaCapable;
}

void ListView_DragSelect(LV *plv, int x, int y)
{
    RECT rc, rcWindow, rcOld, rcUnion, rcTemp2, rcClip;
    POINT pt;
    MSG32 msg32;
    HDC hdc;
    HWND hwnd = plv->ci.hwnd;
    int i, iEnd, dx, dy;
    BOOL bInOld, bInNew = FALSE, bLocked = FALSE;
    DWORD dwTime, dwNewTime;
    HRGN hrgnUpdate = NULL, hrgnLV = NULL;
    BOOL fAlphaMarquee = ListView_IsAlphaMarqueeCapable(plv);

    rc.left = rc.right = x;
    rc.top = rc.bottom = y;

    rcOld = rc;

    UpdateWindow(plv->ci.hwnd);

    if (plv->exStyle & LVS_EX_REGIONAL)
    {
        if ((hrgnUpdate = CreateRectRgn(0,0,0,0)) &&
            (hrgnLV = CreateRectRgn(0,0,0,0)) &&
            (LockWindowUpdate(GetParent(hwnd))))
        {
            hdc = GetDCEx(hwnd, NULL, DCX_PARENTCLIP | DCX_LOCKWINDOWUPDATE);
            bLocked = TRUE;
        }
        else
        {
            goto BailOut;
        }
    }
    else
    {
        hdc = GetDC(hwnd);
    }

    SetCapture(hwnd);

    if (fAlphaMarquee)
    {
        plv->flags |= LVF_MARQUEE;
        plv->rcMarquee = rc;
        InvalidateRect(plv->ci.hwnd, &plv->rcMarquee, TRUE);
    }
    else
    {
        DrawFocusRect(hdc, &rc);
    }

    GetClientRect(hwnd, &rcClip);
    GetWindowRect(hwnd, &rcWindow);

    dwTime = GetTickCount();

    for (;;)
    {
        // WM_CANCELMODE messages will unset the capture, in that
        // case I want to exit this loop
        if (GetCapture() != hwnd)
        {
            break;
        }

        if (!PeekMessage32(&msg32, NULL, 0, 0, PM_REMOVE, TRUE)) 
        {
            // if the cursor is outside of the window rect
            // we need to generate messages to make autoscrolling
            // keep going

            if (!PtInRect(&rcWindow, msg32.pt) &&
                ShouldScroll(plv, &msg32.pt, &rcWindow))
            {
                SetCursorPos(msg32.pt.x, msg32.pt.y);
            }
            else
            {
                WaitMessage();
            }
            continue;
        }


        // See if the application wants to process the message...
        if (CallMsgFilter32(&msg32, MSGF_COMMCTRL_DRAGSELECT, TRUE) != 0)
            continue;

        switch (msg32.message)
        {

        case WM_LBUTTONUP:
        case WM_RBUTTONUP:
        case WM_LBUTTONDOWN:
        case WM_MBUTTONDOWN:
        case WM_MBUTTONUP:
        case WM_RBUTTONDOWN:
            CCReleaseCapture(&plv->ci);
            goto EndOfLoop;


        case WM_TIMER:
            if (msg32.wParam != IDT_MARQUEE)
                goto DoDefault;
            // else fall through

        case WM_MOUSEMOVE:
        {
            int dMax = -1;
            pt = msg32.pt;
            ScreenToClient(hwnd, &pt);

            dwNewTime = GetTickCount();
//            if (1 || (dwNewTime - dwTime) > SCROLL_FREQ)
//          {
                dwTime = dwNewTime;     // reset scroll timer
                ScrollDetect(plv, pt, &dx, &dy);
//          }
//          else
//          {
//              dx = dy = 0;
//          }
            //SetTimer(plv->ci.hwnd, IDT_MARQUEE, SCROLL_FREQ, NULL);

            y -= dy;    // scroll up/down
            x -= dx;    // scroll left/right

            rc.left = x;
            rc.top = y;
            rc.right = pt.x;
            rc.bottom = pt.y;

            // clip drag rect to the window
            //
            if (rc.right > rcClip.right)
                rc.right = rcClip.right;
            if (rc.right < rcClip.left)
                rc.right = rcClip.left;
            if (rc.bottom > rcClip.bottom)
                rc.bottom = rcClip.bottom;
            if (rc.bottom < rcClip.top)
                rc.bottom = rcClip.top;

            OrderRect(&rc);

            if (EqualRect(&rc, &rcOld))
                break;

            // move the old rect
            if (!fAlphaMarquee)
            {
                DrawFocusRect(hdc, &rcOld); // erase old
            }

            if (dx || dy)
                ListView_OnScroll(plv, dx, dy);
            OffsetRect(&rcOld, -dx, -dy);

            //
            // For Report and List view, we can speed things up by
            // only searching through those items that are visible.  We
            // use the hittest to calculate the first item to paint.
            // REARCHITECT:: We are using state specific info here...
            //
            UnionRect(&rcUnion, &rc, &rcOld);

            if (ListView_IsReportView(plv) && !plv->fGroupView)
            {
                i = (int)((plv->ptlRptOrigin.y + rcUnion.top  - plv->yTop)
                        / plv->cyItem);
                iEnd = (int)((plv->ptlRptOrigin.y + rcUnion.bottom  - plv->yTop)
                        / plv->cyItem) + 1;
            }

            else if (ListView_IsListView(plv))
            {
                i = ((plv->xOrigin + rcUnion.left)/ plv->cxItem)
                        * plv->cItemCol + rcUnion.top / plv->cyItem;

                iEnd = ((plv->xOrigin + rcUnion.right)/ plv->cxItem)
                        * plv->cItemCol + rcUnion.bottom / plv->cyItem + 1;
            }

            else
            {
                if (ListView_IsOwnerData(plv))
                {
                    ListView_CalcMinMaxIndex(plv, &rcUnion, &i, &iEnd);
                }
                else
                {
                    i = 0;
                    iEnd = ListView_Count(plv);
                }
            }

            // make sure our endpoint is in range.
            if (iEnd > ListView_Count(plv))
                iEnd = ListView_Count(plv);

            if (i < 0)
                i = 0;

            if (ListView_IsOwnerData(plv) && (i < iEnd))
            {
                ListView_NotifyCacheHint(plv, i, iEnd-1);
            }

            if (bInNew && !(msg32.wParam & (MK_CONTROL | MK_SHIFT)))
            {
                plv->iMark = -1;
            }

            for (; i  < iEnd; i++)
            {
                RECT dummy;
                ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, NULL, NULL, &rcTemp2);

                // don't do this infaltion if we're in report&full row mode
                // in that case, just touching is good enough
                if (!(ListView_IsReportView(plv) && ListView_FullRowSelect(plv))) 
                {
                    int cxInflate = (rcTemp2.right - rcTemp2.left) / 4;
                    if (ListView_IsListView(plv))
                    {
                        cxInflate = min(cxInflate, plv->cxSmIcon);
                    }
                    InflateRect(&rcTemp2, -cxInflate, -(rcTemp2.bottom - rcTemp2.top) / 4);
                }

                bInOld = (IntersectRect(&dummy, &rcOld, &rcTemp2) != 0);
                bInNew = (IntersectRect(&dummy, &rc, &rcTemp2) != 0);

                if (msg32.wParam & MK_CONTROL)
                {
                    if (bInOld != bInNew) 
                    {
                        ListView_ToggleSelection(plv, i);
                    }
                } 
                else
                {
                    // was there a change?
                    if (bInOld != bInNew)
                    {
                        ListView_OnSetItemState(plv, i, bInOld ? 0 : LVIS_SELECTED, LVIS_SELECTED);
                    }

                    // if no alternate keys are down.. set the mark to
                    // the item furthest from the cursor
                    if (bInNew && !(msg32.wParam & (MK_CONTROL | MK_SHIFT))) 
                    {
                        int dItem;
                        dItem = (rcTemp2.left - pt.x) * (rcTemp2.left - pt.x) +
                            (rcTemp2.top - pt.y) * (rcTemp2.top - pt.y);
                        // if it's further away, set this as the mark
                        //DebugMsg(TF_LISTVIEW, "dItem = %d, dMax = %d", dItem, dMax);
                        if (dItem > dMax) 
                        {
                            //DebugMsg(TF_LISTVIEW, "taking dItem .. iMark = %d", i);
                            dMax = dItem;
                            plv->iMark = i;
                        }
                    }
                }
            }

            if (fAlphaMarquee)
            {
                RECT rcInvalid;
                UnionRect(&rcInvalid, &rcOld, &rc);
                InflateRect(&rcInvalid, 1, 1);

                plv->flags |= LVF_MARQUEE;
                plv->rcMarquee = rc;

                InvalidateRect(plv->ci.hwnd, &rcInvalid, TRUE);
            }

            //DebugMsg(TF_LISTVIEW, "Final iMark = %d", plv->iMark);
            if (bLocked) 
            {
                if (GetUpdateRgn(plv->ci.hwnd, hrgnUpdate, FALSE) > NULLREGION)
                {
                    ValidateRect(plv->ci.hwnd, NULL);
                    GetWindowRgn(plv->ci.hwnd, hrgnLV);
                    CombineRgn(hrgnUpdate, hrgnUpdate, hrgnLV, RGN_AND);
                    SelectClipRgn(hdc, hrgnUpdate);
                    SendMessage(plv->ci.hwnd, WM_PRINTCLIENT, (WPARAM)hdc, 0);
                    SelectClipRgn(hdc, NULL);
                }
            } 
            else 
            {
                UpdateWindow(plv->ci.hwnd);    // make selection draw
            }


            if (!fAlphaMarquee)
            {
                DrawFocusRect(hdc, &rc);
            }
    
            rcOld = rc;
            break;
        }

        case WM_KEYDOWN:
            switch (msg32.wParam) 
            {
            case VK_ESCAPE:
                ListView_DeselectAll(plv, -1);
                goto EndOfLoop;
            }
        case WM_CHAR:
        case WM_KEYUP:
            // don't process thay keyboard stuff during marquee
            break;


        default:

            // don't process mouse wheel stuff
            if (msg32.message == g_msgMSWheel)
                break;

        DoDefault:
            TranslateMessage32(&msg32, TRUE);
            DispatchMessage32(&msg32, TRUE);
        }
    }

EndOfLoop:

    plv->flags &= ~LVF_MARQUEE;

    if (fAlphaMarquee)
    {
        InvalidateRect(plv->ci.hwnd, &rcOld, TRUE);
    }
    else
    {
        DrawFocusRect(hdc, &rcOld); // erase old
    }

    ReleaseDC(hwnd, hdc);

BailOut:
    if (hrgnUpdate)
        DeleteObject(hrgnUpdate);
    if (hrgnLV)
        DeleteObject(hrgnLV);
    if (bLocked)
        LockWindowUpdate(NULL);
}


#define SHIFT_DOWN(keyFlags)    (keyFlags & MK_SHIFT)
#define CONTROL_DOWN(keyFlags)  (keyFlags & MK_CONTROL)
#define RIGHTBUTTON(keyFlags)   (keyFlags & MK_RBUTTON)

void ListView_ButtonSelect(LV* plv, int iItem, UINT keyFlags, BOOL bSelected)
{
    if (SHIFT_DOWN(keyFlags))
    {
        ListView_SelectRangeTo(plv, iItem, !CONTROL_DOWN(keyFlags));
        ListView_SetFocusSel(plv, iItem, TRUE, FALSE, FALSE);
    }
    else if (!CONTROL_DOWN(keyFlags))
    {
        ListView_SetFocusSel(plv, iItem, TRUE, !bSelected, FALSE);
        if (!RIGHTBUTTON(keyFlags) && bSelected && ListView_IsSimpleSelect(plv))
        {
            ListView_HandleStateIconClick(plv, iItem);
        }
    }
}

void ListView_HandleStateIconClick(LV* plv, int iItem)
{
    int iState =
        ListView_OnGetItemState(plv, iItem, LVIS_STATEIMAGEMASK);

    iState = STATEIMAGEMASKTOINDEX(iState) -1;
    iState++;
    iState %= ImageList_GetImageCount(plv->himlState);
    iState++;
    ListView_OnSetItemState(plv, iItem, INDEXTOSTATEIMAGEMASK(iState), LVIS_STATEIMAGEMASK);
}

BOOL ListView_RBeginMarquee(LV* plv, int x, int y, LPLVHITTESTINFO plvhti)
{
    if (ListView_FullRowSelect(plv) &&
        ListView_IsReportView(plv) &&
        !(plv->ci.style & LVS_SINGLESEL) &&
        !ListView_OwnerDraw(plv) &&
        plvhti->iSubItem == 0) 
    {
        // can only begin marquee in column 0.
        if (plvhti->flags == LVHT_ONITEM)
        {
            return TRUE;
        }
    }

    return FALSE;
}

void ListView_HandleMouse(LV* plv, BOOL fDoubleClick, int x, int y, UINT keyFlags, BOOL bMouseWheel)
{
    LV_HITTESTINFO ht;
    NMITEMACTIVATE nm;
    int iItem, click, drag;
    BOOL bSelected, fHadFocus, fNotifyReturn = FALSE;
    BOOL fActive;
    HWND hwnd = plv->ci.hwnd;

    if (plv->fButtonDown)
        return;
    plv->fButtonDown = TRUE;


    if (plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickHappened && plv->fOneClickOK)
    {
        KillTimer(plv->ci.hwnd, IDT_ONECLICKHAPPENED);
        plv->fOneClickHappened = FALSE;
        CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &(plv->nmOneClickHappened.hdr));
        if (!IsWindow(hwnd))
            return;
    }

    fHadFocus = (GetFocus() == plv->ci.hwnd);
    click = RIGHTBUTTON(keyFlags) ? NM_RCLICK : NM_CLICK;
    drag  = RIGHTBUTTON(keyFlags) ? LVN_BEGINRDRAG : LVN_BEGINDRAG;

    fActive = ChildOfActiveWindow(plv->ci.hwnd) || fShouldFirstClickActivate() ||
              ChildOfDesktop(plv->ci.hwnd);

    TraceMsg(TF_LISTVIEW, "ListView_OnButtonDown %d", fDoubleClick);

    SetCapture(plv->ci.hwnd);

    plv->ptCapture.x = x;
    plv->ptCapture.y = y;

    if (!ListView_DismissEdit(plv, FALSE) && GetCapture() != plv->ci.hwnd)
        goto EndButtonDown;

    CCReleaseCapture(&plv->ci);

    // REVIEW: right button implies no shift or control stuff
    // Single selection style also implies no modifiers
    //if (RIGHTBUTTON(keyFlags) || (plv->ci.style & LVS_SINGLESEL))
    if ((plv->ci.style & LVS_SINGLESEL))
        keyFlags &= ~(MK_SHIFT | MK_CONTROL);

    ht.pt.x = x;
    ht.pt.y = y;
    iItem = ListView_OnSubItemHitTest(plv, &ht);
    if (ht.iSubItem != 0) 
    {
        // if we're not in full row select,
        // hitting on a subitem is like hitting on nowhere
        // also, in win95, ownerdraw fixed effectively had full row select
        if (!ListView_FullRowSelect(plv) &&
            !(plv->ci.style & LVS_OWNERDRAWFIXED)) 
        {
            iItem = -1;
            ht.flags = LVHT_NOWHERE;
        }
    }

    nm.iItem = iItem;
    nm.iSubItem = ht.iSubItem;
    nm.uChanged = 0;
    nm.ptAction.x = x;
    nm.ptAction.y = y;
    nm.uKeyFlags = GetLVKeyFlags();

    // FProt Profesional assumed that if the notification structure pointer + 14h bytes
    // had a value 2 that it was a displayinfo structure and they then used offset +2c as lparam...
    nm.uNewState = 0;

    plv->iNoHover = iItem;

    bSelected = (iItem >= 0) && ListView_OnGetItemState(plv, iItem, LVIS_SELECTED);

    if (fDoubleClick)
    {
        // Cancel any name editing that might happen.
        ListView_CancelPendingEdit(plv);
        KillTimer(plv->ci.hwnd, IDT_SCROLLWAIT);

        if (ht.flags & LVHT_NOWHERE) 
        {
            // this would have been done in the first click in win95 except
            // now we blow off the first click on focus change
            if (!SHIFT_DOWN(keyFlags) && !CONTROL_DOWN(keyFlags))
                ListView_DeselectAll(plv, -1);
        }

        click = RIGHTBUTTON(keyFlags) ? NM_RDBLCLK : NM_DBLCLK ;
        if (CCSendNotify(&plv->ci, click, &nm.hdr))
            goto EndButtonDown;

        /// some (comdlg32 for example) destroy on double click
        // we need to bail if that happens because plv is no longer valid
        if (!IsWindow(hwnd))
            return;

        if (click == NM_DBLCLK)
        {
            // these shift control flags are to mirror when we don't send out the activate on the single click,
            // but are in the oneclick activate mode  (see below)
            if (ht.flags & (LVHT_ONITEMLABEL | LVHT_ONITEMICON))
            {
                // possible scenarios below:
                // 1) we're using classic windows style so double click => launch
                // 2) we're using single click activate
                //    a) shift is down and item is selected => launch
                //       this implies that the first click selected it
                //    b) control is down => launch
                //       the first click toggled the selection so if the item was
                //       the only item selected and we double clicked on it
                //       the first click deselects it and no item is selected
                //       so nothing will be launched - this is win95 behavior
                if (!(plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickOK) ||
                    (plv->exStyle & LVS_EX_ONECLICKACTIVATE &&  plv->fOneClickOK &&
                     (SHIFT_DOWN(keyFlags) || CONTROL_DOWN(keyFlags))))
                {
                    CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &nm.hdr);
                }
            }
            // Double-click on checkbox state icon cycles it just like single click
            else if ((ht.flags & LVHT_ONITEMSTATEICON) && ListView_CheckBoxes(plv)) 
            {
                ListView_HandleStateIconClick(plv, iItem);
            }
        }

        if (!IsWindow(hwnd))
            return;
        goto EndButtonDown;
    }

    if (ht.flags & (LVHT_ONITEMLABEL | LVHT_ONITEMICON))
    {
        // if it wasn't selected, we're about to select it... play
        // a little ditty for us...
        CCPlaySound(c_szSelect);

        if (!RIGHTBUTTON(keyFlags) || (!CONTROL_DOWN(keyFlags) && !SHIFT_DOWN(keyFlags)))
            ListView_ButtonSelect(plv, iItem, keyFlags, bSelected);

        // handle full row select
        // If single-select listview, disable marquee selection.
        //
        // Careful - CheckForDragBegin yields and the app may have
        // destroyed the item we were thinking about dragging!
        //
        if (!bMouseWheel && CheckForDragBegin(plv->ci.hwnd, x, y))
        {
            // should we do a marquee?
            if (ListView_RBeginMarquee(plv, x, y, &ht) &&
                !CCSendNotify(&plv->ci, LVN_MARQUEEBEGIN, &nm.hdr))
            {
                ListView_DragSelect(plv, x, y);
                fNotifyReturn = !CCSendNotify(&plv->ci, click, &nm.hdr);
            }
            else
            {
                // Before we start dragging, make it sure that it is
                // selected and has the focus.
                ListView_SetFocusSel(plv, iItem, TRUE, FALSE, FALSE);

                if (!SHIFT_DOWN(keyFlags))
                    plv->iMark = iItem;

                // Then, we need to update the window before start dragging
                // to show the selection chagne.
                UpdateWindow(plv->ci.hwnd);

                // Remember which item we're dragging, as it affects ListView_OnInsertMarkHitTest
                plv->iDrag = iItem;

                CCSendNotify(&plv->ci, drag, &nm.hdr);

                plv->iDrag = -1;

                goto EndButtonDown;
            }
        }

        // CheckForDragBegin yields, so revalidate before continuing
        else if (IsWindow(hwnd))
        {
            // button came up and we are not dragging

            if (!RIGHTBUTTON(keyFlags))
            {
                if (CONTROL_DOWN(keyFlags))
                {
                    // do this on the button up so that ctrl-dragging a range
                    // won't toggle the select.

                    if (SHIFT_DOWN(keyFlags))
                        ListView_SetFocusSel(plv, iItem, FALSE, FALSE, FALSE);
                    else
                    {
                        ListView_SetFocusSel(plv, iItem, TRUE, FALSE, TRUE);
                    }
                }
            }
            if (!SHIFT_DOWN(keyFlags))
                plv->iMark = iItem;

            if (!ListView_SetFocus(plv->ci.hwnd))    // activate this window
                return;

            // now do the deselect stuff
            if (!SHIFT_DOWN(keyFlags) && !CONTROL_DOWN(keyFlags) && !RIGHTBUTTON(keyFlags))
            {
                ListView_DeselectAll(plv, iItem);
                if ((ht.flags & LVHT_ONITEMLABEL) && bSelected &&
                    !(plv->exStyle & (LVS_EX_ONECLICKACTIVATE|LVS_EX_TWOCLICKACTIVATE)))
                {

                    // doing this check for ownerdrawfixed is for compatability.
                    // we don't want to go into edit mode if the user just happened to click
                    // to this window when a different one had focus,
                    // but ms hammer relied upon the notification being sent (and we
                    // don't go into edit mode anyways for ownerdraw)
                    if (fHadFocus ||
                        (plv->ci.style & LVS_OWNERDRAWFIXED))
                    {
                        // Click on item label.  It was selected and
                        // no modifier keys were pressed and no drag operation
                        // So setup for name edit mode.  Still need to wait
                        // to make sure user is not doing double click.
                        //
                        ListView_SetupPendingNameEdit(plv);
                    }
                }
            }

            fNotifyReturn = !CCSendNotify(&plv->ci, click, &nm.hdr);
            if (!IsWindow(hwnd))
                return;

            if (plv->exStyle & (LVS_EX_ONECLICKACTIVATE|LVS_EX_TWOCLICKACTIVATE))
            {
                if (!RIGHTBUTTON(keyFlags))
                {
                    // We don't ItemActivate within one double-click time of creating
                    // this listview. This is a common occurence for people used to
                    // double-clicking. The first click pops up a new window which
                    // receives the second click and ItemActivates the item...
                    //
                    if ((plv->exStyle & LVS_EX_ONECLICKACTIVATE && plv->fOneClickOK) || bSelected)
                    {
                        if (fActive)
                        {
                            // condition: if we're in a single click activate mode
                            // don't launch if control or shift keys are pressed
                            BOOL bCond = plv->exStyle & LVS_EX_ONECLICKACTIVATE && !CONTROL_DOWN(keyFlags) && !SHIFT_DOWN(keyFlags);

                            if ((bSelected && plv->exStyle & LVS_EX_TWOCLICKACTIVATE) ||
                                (bCond && !g_bUseDblClickTimer))
                            {
                                CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &nm.hdr);
                                if (!IsWindow(hwnd))
                                    return;
                            }
                            else if (bCond && g_bUseDblClickTimer)
                            {
                                plv->fOneClickHappened = TRUE;
                                plv->nmOneClickHappened = nm;
                                SetTimer(plv->ci.hwnd, IDT_ONECLICKHAPPENED, GetDoubleClickTime(), NULL);
                            }
                        }
                    }
                }
            }
        }
        else
        {
            // IsWindow() failed.  Bail.
            return;
        }
    }
    else if (ht.flags & LVHT_ONITEMSTATEICON)
    {
        // Should activate window and send notificiation to parent...
        if (!ListView_SetFocus(plv->ci.hwnd))   // activate this window
            return;
        fNotifyReturn = !CCSendNotify(&plv->ci, click, &nm.hdr);
        if (fNotifyReturn && ListView_CheckBoxes(plv))
        {
            ListView_HandleStateIconClick(plv, iItem);
        }
    }
    else if (ht.flags & LVHT_NOWHERE)
    {
        if (!ListView_SetFocus(plv->ci.hwnd))   // activate this window
            return;

        // If single-select listview, disable marquee selection.
        if (!(plv->ci.style & LVS_SINGLESEL) && CheckForDragBegin(plv->ci.hwnd, x, y) &&
            !CCSendNotify(&plv->ci, LVN_MARQUEEBEGIN, &nm.hdr))
        {
            if (!SHIFT_DOWN(keyFlags) && !CONTROL_DOWN(keyFlags))
                ListView_DeselectAll(plv, -1);
            ListView_DragSelect(plv, x, y);
            fNotifyReturn = !CCSendNotify(&plv->ci, click, &nm.hdr);
        }
        else if (IsWindow(hwnd))
        {
            // if we didn't have focus and aren't showing selection always,
            // make the first click just set focus
            BOOL fDoFirstClickSelection = (fHadFocus || plv->ci.style & LVS_SHOWSELALWAYS ||
                                           CONTROL_DOWN(keyFlags) || SHIFT_DOWN(keyFlags) ||
                                           RIGHTBUTTON(keyFlags));

            if (fDoFirstClickSelection && fActive)
            {

                if (!SHIFT_DOWN(keyFlags) && !CONTROL_DOWN(keyFlags))
                    ListView_DeselectAll(plv, -1);

                fNotifyReturn = !CCSendNotify(&plv->ci, click, &nm.hdr);
            }
        }
        else
        {
            // IsWindow() failed.  Bail.
            return;
        }
    }

    // re-check the key state so we don't get confused by multiple clicks

    // this needs to check the GetKeyState stuff only when we've gone into
    // a modal loop waiting for the rbutton up.
    if (fNotifyReturn && (click == NM_RCLICK)) // && (GetKeyState(VK_RBUTTON)>=0))
    {
        POINT pt = { x, y };
        ClientToScreen(plv->ci.hwnd, &pt);
        FORWARD_WM_CONTEXTMENU(plv->ci.hwnd, plv->ci.hwnd, pt.x, pt.y, SendMessage);
    }

EndButtonDown:
    if (IsWindow(hwnd))
        plv->fButtonDown = FALSE;
}

void ListView_OnButtonDown(LV* plv, BOOL fDoubleClick, int x, int y, UINT keyFlags)
{
    ListView_HandleMouse(plv, fDoubleClick, x, y, keyFlags, FALSE);
}

BOOL ListView_CancelPendingTimer(LV* plv, UINT fFlags, int idTimer)
{
    if (plv->flags & fFlags)
    {
        KillTimer(plv->ci.hwnd, idTimer);
        plv->flags &= ~fFlags;
        return TRUE;
    }
    return FALSE;
}

//
// ListView_OnTimer:
//     process the WM_TIMER message.  If the timer id is thta
//     of the name editing, we should then start the name editing mode.
//
void ListView_OnTimer(LV* plv, UINT id)
{
    KillTimer(plv->ci.hwnd, id);

    if (id == IDT_NAMEEDIT)
    {
        // Kill the timer as we wont need any more messages from it.

        if (ListView_CancelPendingEdit(plv)) 
        {
            // And start name editing mode.
            if (!ListView_OnEditLabel(plv, plv->iFocus, NULL))
            {
                ListView_DismissEdit(plv, FALSE);
                ListView_SetFocusSel(plv, plv->iFocus, TRUE, TRUE, FALSE);
            }
        }
    } 
    else if (id == IDT_SCROLLWAIT) 
    {
        if (ListView_CancelScrollWait(plv)) 
        {
            ListView_OnEnsureVisible(plv, plv->iFocus, TRUE);
        }
    } 
    else if (id == IDT_ONECLICKOK) 
    {
        plv->fOneClickOK = TRUE;
    } 
    else if (id == IDT_ONECLICKHAPPENED) 
    {
        //if (!g_bUseDblClickTimer)
        //{
        ////    EnableWindow(plv->ci.hwnd, TRUE);
        //    SetWindowBits(plv->ci.hwnd, GWL_STYLE, WS_DISABLED, 0);
        //    plv->fOneClickHappened = FALSE;
        //}
        // check the bit just in case they double-clicked
        //else
        if (plv->fOneClickHappened)
        {
            plv->fOneClickHappened = FALSE;
            CCSendNotify(&plv->ci, LVN_ITEMACTIVATE, &(plv->nmOneClickHappened.hdr));
        }
    }
    else if (id == IDT_TRACKINGTIP)
    {
        // Display keyboard nav tracking tooltip popups

        if (ListView_IsKbdTipTracking(plv))  // Item requires tracking popup
        {
            // Ensure index is still valid
            if (ListView_IsValidItemNumber(plv, plv->iTracking))
            {
                TOOLINFO ti = {0};

                ti.cbSize = sizeof(TOOLINFO);
                ti.hwnd = plv->ci.hwnd;

                // Cancel previous
                SendMessage(plv->hwndToolTips, TTM_TRACKACTIVATE, FALSE, (LPARAM)&ti);

                // Switch ListView's tooltip window to "tracking" (manual) mode
                SendMessage(plv->hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti);
                ti.uFlags |= TTF_TRACK;
                SendMessage(plv->hwndToolTips, TTM_SETTOOLINFO, 0, (LPARAM)&ti);

                // Activate and establish size
                SendMessage(plv->hwndToolTips, TTM_TRACKACTIVATE, TRUE, (LPARAM)&ti);
            }
            else
            {
                // Index was invalid (ListView set of items changed), tip track cancel, no popup
                plv->iTracking = LVKTT_NOTRACK;
            }
        }
    }
}

//
// ListView_SetupPendingNameEdit:
//      Sets up a timer to begin name editing at a delayed time.  This
//      will allow the user to double click on the already selected item
//      without going into name editing mode, which is especially important
//      in those views that only show a small icon.
//
void ListView_SetupPendingNameEdit(LV* plv)
{
    SetTimer(plv->ci.hwnd, IDT_NAMEEDIT, GetDoubleClickTime(), NULL);
    plv->flags |= LVF_NMEDITPEND;
}

void ListView_OnHVScroll(LV* plv, UINT code, int pos, int sb)
{
    int iScrollCount = 0;

    SCROLLINFO si;

    si.cbSize = sizeof(SCROLLINFO);
    si.fMask = SIF_TRACKPOS;

    // if we're in 32bits, don't trust the pos since it's only 16bit's worth
    if (ListView_GetScrollInfo(plv, sb, &si))
        pos = (int)si.nTrackPos;

    ListView_DismissEdit(plv, FALSE);

    _ListView_OnScroll(plv, code, pos, sb);

    switch (code)
    {
    case SB_PAGELEFT:
    case SB_PAGERIGHT:
        if (plv->iScrollCount < SMOOTHSCROLLLIMIT)
            plv->iScrollCount += 3;
        break;

    case SB_LINELEFT:
    case SB_LINERIGHT:
        if (plv->iScrollCount < SMOOTHSCROLLLIMIT)
            plv->iScrollCount++;
        break;

    case SB_ENDSCROLL:
        plv->iScrollCount = 0;
        break;

    }
}

void ListView_OnVScroll(LV* plv, HWND hwndCtl, UINT code, int pos)
{
    ListView_OnHVScroll(plv, code, pos, SB_VERT);
}

void ListView_OnHScroll(LV* plv, HWND hwndCtl, UINT code, int pos)
{
    ListView_OnHVScroll(plv, code, pos, SB_HORZ);
}

int ListView_ValidateOneScrollParam(LV* plv, int iDirection, int dx)
{
    SCROLLINFO si;

    si.cbSize = sizeof(SCROLLINFO);
    si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;

    if (!ListView_GetScrollInfo(plv, iDirection, &si))
        return 0;

    if (si.nPage)
        si.nMax -= (si.nPage - 1);
    si.nPos += dx;
    if (si.nPos < si.nMin) 
    {
        dx += (int)(si.nMin - si.nPos);
    } 
    else if (si.nPos > si.nMax) 
    {
        dx -= (int)(si.nPos - si.nMax);
    }

    return dx;
}

BOOL ListView_ValidateScrollParams(LV* plv, int * pdx, int *pdy)
{
    int dx = *pdx;
    int dy = *pdy;

    if (plv->ci.style & LVS_NOSCROLL)
        return FALSE;

    if (ListView_IsListView(plv))
    {
        ListView_MaybeResizeListColumns(plv, 0, ListView_Count(plv)-1);
#ifdef COLUMN_VIEW
        if (dx < 0)
            dx = (dx - (plv->cxItem - 1)) / plv->cxItem;
        else
            dx = (dx + (plv->cxItem - 1)) / plv->cxItem;

        if (dy)
            return FALSE;
#else
        if (dy < 0)
            dy = (dy - (plv->cyItem - 1)) / plv->cyItem;
        else
            dy = (dy + (plv->cyItem - 1)) / plv->cyItem;

        if (dx)
            return FALSE;
#endif
    }
    else if (ListView_IsReportView(plv))
    {
        //
        // Note: This function expects that dy is in number of lines
        // and we are working with pixels so do a conversion use some
        // rounding up and down to make it right
        if (dy > 0)
            dy = (dy + plv->cyItem/2) / plv->cyItem;
        else
            dy = (dy - plv->cyItem/2) / plv->cyItem;
    }

    if (dy)
    {
        dy = ListView_ValidateOneScrollParam(plv, SB_VERT, dy);
        if (ListView_IsReportView(plv)
#ifndef COLUMN_VIEW
            || ListView_IsListView(plv)
#endif
           )
        {
           // convert back to pixels
           dy *= plv->cyItem;
        }
        *pdy = dy;
    }

    if (dx)
    {
        dx = ListView_ValidateOneScrollParam(plv, SB_HORZ, dx);
#ifdef COLUMN_VIEW
        if (ListView_IsListView(plv))
        {
            dx *= plv->cxItem;
        }
#endif
        *pdx = dx;
    }

    return TRUE;
}

BOOL ListView_SendScrollNotify(LV* plv, BOOL fBegin, int dx, int dy)
{
    NMLVSCROLL nm;

    nm.dx = dx;
    nm.dy = dy;

    return !CCSendNotify(&plv->ci, fBegin ? LVN_BEGINSCROLL : LVN_ENDSCROLL, &nm.hdr);
}


BOOL ListView_OnScrollSelectSmooth(LV* plv, int dx, int dy, UINT uSmooth)
{
    if (plv->ci.style & LVS_NOSCROLL)
        return FALSE;

#ifdef DEBUG
    // If we try and scroll an illegal amount then ListView_IScroll2_SmoothScroll
    // will offset ptOrigin incorrectly (it doesn't check min/max range) which then
    // mucks up hit testing and insert marks
    if (ListView_IsIScrollView(plv))
    {
        int dxTmp = dx;
        int dyTmp = dy;

        ASSERT(ListView_ValidateScrollParams(plv, &dxTmp, &dyTmp) &&
               dxTmp == dx && dyTmp == dy);
    }
#endif

    if (ListView_IsListView(plv))
    {
        // Scale pixel count to column count
        //
#ifdef COLUMN_VIEW
        if (dx < 0)
            dx -= plv->cxItem - 1;
        else
            dx += plv->cxItem - 1;

        dx = dx / plv->cxItem;

        if (dy)
            return FALSE;
#else
        if (dy < 0)
            dy -= plv->cyItem - 1;
        else
            dy += plv->cyItem - 1;

        dy = dy / plv->cyItem;

        if (dx)
            return FALSE;
#endif
    }
    else if (ListView_IsReportView(plv) && !plv->fGroupView)
    {
        //
        // Note: This function expects that dy is in number of lines
        // and we are working with pixels so do a conversion use some
        // rounding up and down to make it right
        if (dy > 0)
            dy = (dy + plv->cyItem/2) / plv->cyItem;
        else
            dy = (dy - plv->cyItem/2) / plv->cyItem;
    }
    
    ListView_SendScrollNotify(plv, TRUE, dx, dy);
    _ListView_Scroll2(plv, dx, dy, uSmooth);
    ListView_SendScrollNotify(plv, FALSE, dx, dy);
    ListView_UpdateScrollBars(plv);
    return TRUE;
}

BOOL ListView_OnScroll(LV* plv, int dx, int dy)
{
    return ListView_OnScrollSelectSmooth(plv, dx, dy, 0);
}

#ifdef DEBUG
BOOL ListView_ValidatercView(LV* plv, RECT* prcView, BOOL fRecalcDone)
{
    BOOL fRet = prcView->left != RECOMPUTE ? TRUE : !fRecalcDone;

    // hitting this assert is only valuable if there's a manual repro, which never happens in stress
#ifdef FULL_DEBUG 
    if (!ListView_IsOwnerData(plv) && ListView_IsIScrollView(plv) && !(plv->fGroupView && plv->hdpaGroups) && ListView_RedrawEnabled(plv))
    {
        RECT rcViewTmp;
        fRet = ListView_ICalcViewRect(plv, TRUE, &rcViewTmp);
        if (fRet)
        {
            ASSERT(prcView->left != RECOMPUTE);
            fRet = IsEqualRect(rcViewTmp, *prcView);
        }
        else
        {
            fRet = !fRecalcDone;
        }
    }
#endif
    
    return fRet;
}

BOOL ListView_ValidateScrollPositions(LV* plv, RECT* prcClient)
{
    BOOL fRet = TRUE;

    // hitting this assert is only valuable if there's a manual repro, which never happens in stress
#ifdef FULL_DEBUG 
    // if we're in ListView_FixIScrollPositions, then it will fix up the scroll positions when we unwind
    if (ListView_IsIScrollView(plv) && (!plv->fInFixIScrollPositions) && ListView_RedrawEnabled(plv))
    {
        if (!(plv->ci.style & LVS_NOSCROLL))
        {
            // if we don't have a client rect there's no way to validate anything, assume everything will be recomputed later
            RECT rcClient;
            if (!prcClient)
            {
                if (plv->rcView.left != RECOMPUTE)
                {
                    ListView_GetStyleAndClientRectGivenViewRect(plv, &plv->rcView, &rcClient);
                    prcClient = &rcClient;
                }
            }

            if (prcClient)
            {        
                if (fRet)
                {
                    if (RECTWIDTH(*prcClient) < RECTWIDTH(plv->rcView))
                    {
                        fRet = (plv->rcView.left <= plv->ptOrigin.x) && (plv->ptOrigin.x+RECTWIDTH(*prcClient) <= plv->rcView.right);
                    }
                    else
                    {
                        fRet = (plv->ptOrigin.x <= plv->rcView.left) && (plv->rcView.right <= plv->ptOrigin.x+RECTWIDTH(*prcClient));
                    }
                }

                if (fRet)
                {
                    if (RECTHEIGHT(*prcClient) < RECTHEIGHT(plv->rcView))
                    {
                        fRet = (plv->rcView.top <= plv->ptOrigin.y) && (plv->ptOrigin.y+RECTHEIGHT(*prcClient) <= plv->rcView.bottom);
                    }
                    else
                    {
                        fRet = (plv->ptOrigin.y <= plv->rcView.top) && (plv->rcView.bottom <= plv->ptOrigin.y+RECTHEIGHT(*prcClient));
                    }
                }
            }
        }
        else
        {
            fRet = (plv->ptOrigin.x == 0) && (plv->ptOrigin.y == 0);
        }
    }
#endif

    return fRet;
}
#endif

BOOL ListView_OnEnsureVisible(LV* plv, int i, BOOL fPartialOK)
{
    RECT rcBounds;
    RECT rc;
    RECT rcClient;
    int dx, dy;
    
    if (!ListView_IsValidItemNumber(plv, i) || plv->ci.style & LVS_NOSCROLL)
        return FALSE;
    
    // we need to do this again inside because some callers don't do it.
    // other callers that do this need to do it outside so that
    // they can know not to call us if there's not wait pending
    ListView_CancelScrollWait(plv);
    
    if (ListView_IsReportView(plv))
        return ListView_ROnEnsureVisible(plv, i, fPartialOK);

    ListView_GetRects(plv, i, QUERY_DEFAULT, &rc, NULL, &rcBounds, NULL);
    
    if (plv->fGroupView)
    {
        LISTITEM* pitem = ListView_GetItemPtr(plv, i);
        if (pitem)
        {
            LISTGROUP* pgrp = ListView_FindFirstVisibleGroup(plv);
            if (pitem->pGroup == pgrp && pgrp)
            {
                rcBounds.top -= LISTGROUP_HEIGHT(plv, pgrp);
            }
        }
    }
    
    if (!fPartialOK)
        rc = rcBounds;

    // Scrolling is done relative to this calculated rect, not the size of hwndListview (plv->sizeClient)
    ListView_GetClientRect(plv, &rcClient, TRUE, NULL);
    ASSERT(ListView_ValidateScrollPositions(plv, &rcClient));

    // If any part of rc is outside of rcClient, then
    // scroll so that all of rcBounds is visible.
    //
    dx = 0;
    if (rc.left < 0 || (rc.right >= rcClient.right && rcClient.right != 0))
    {
        dx = rcBounds.left - 0;
        if (dx >= 0)
        {
            dx = rcBounds.right - rcClient.right;
            if (dx <= 0)
                dx = 0;
            else if ((rcBounds.left - dx) < 0)
                dx = rcBounds.left - 0; // Not all fits...
        }
    }
    dy = 0;
    if (rc.top < 0 || (rc.bottom >= rcClient.bottom && rcClient.bottom != 0))
    {
        dy = rcBounds.top - 0;
        if (dy >= 0)
        {
            dy = rcBounds.bottom - rcClient.bottom;
            if (dy < 0)
                dy = 0;
        }
    }
    
    // if rcClient is 0 or 1 pixel in size, it is impossible to scroll it
    if (dx | dy)
        ListView_ValidateScrollParams(plv, &dx, &dy);

    if (dx | dy)
        return ListView_OnScrollSelectSmooth(plv, dx, dy, SSW_EX_IMMEDIATE);
    
    return TRUE;
}

void ListView_UpdateScrollBars(LV* plv)
{
    RECT rc;
    DWORD dwStyle;

    if ((plv->ci.style & LVS_NOSCROLL) ||
        (!(ListView_RedrawEnabled(plv))))
        return;

    _ListView_UpdateScrollBars(plv);

    GetClientRect(plv->ci.hwnd, &rc);
    plv->sizeClient.cx = rc.right;
    plv->sizeClient.cy = rc.bottom;

    dwStyle = ListView_GetWindowStyle(plv);
    plv->ci.style = (plv->ci.style & ~(WS_HSCROLL | WS_VSCROLL)) | (dwStyle & WS_HSCROLL | WS_VSCROLL);
}

void ListView_OnSetFont(LV* plv, HFONT hfont, BOOL fRedraw)
{
    HDC hdc;
    SIZE siz;
    LOGFONT lf;
    HFONT hfontPrev;
    TEXTMETRIC tm;

    if ((plv->flags & LVF_FONTCREATED) && plv->hfontLabel) 
    {
        DeleteObject(plv->hfontLabel);
        plv->flags &= ~LVF_FONTCREATED;
    }

    if (hfont == NULL) 
    {
        SystemParametersInfo(SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, FALSE);
        hfont = CreateFontIndirect(&lf);
        plv->flags |= LVF_FONTCREATED;
    }

    hdc = GetDC(HWND_DESKTOP);
    if (hdc)
    {
        hfontPrev = SelectFont(hdc, hfont);

        GetTextMetrics(hdc, &tm);
 
        plv->cyLabelChar = tm.tmHeight;
        plv->cxLabelChar = tm.tmAveCharWidth; // Maybe this should tm.tmMaxCharWidth

        GetTextExtentPoint(hdc, c_szEllipses, CCHELLIPSES, &siz);
        plv->cxEllipses = siz.cx;

        SelectFont(hdc, hfontPrev);
        ReleaseDC(HWND_DESKTOP, hdc);
    }

    plv->hfontLabel = hfont;

    if (plv->hfontLabel)
    {
        LOGFONT lf;
        if (GetObject(plv->hfontLabel, sizeof(LOGFONT), &lf))
        {
            if (plv->hfontGroup)
                DeleteObject(plv->hfontGroup);

            CCAdjustForBold(&lf);

            plv->hfontGroup = CreateFontIndirect(&lf);
        }
    }

    plv->ci.uiCodePage = GetCodePageForFont(hfont);

    ListView_InvalidateCachedLabelSizes(plv);

    /* Ensure that our tooltip control uses the same font as the list view is using, therefore
    /  avoiding any nasty formatting problems. */

    if (plv->hwndToolTips)
    {
        FORWARD_WM_SETFONT(plv->hwndToolTips, plv->hfontLabel, FALSE, SendMessage);
    }

    // If we have a header window, we need to forward this to it also
    // as we have destroyed the hfont that they are using...
    if (plv->hwndHdr)
    {
        FORWARD_WM_SETFONT(plv->hwndHdr, plv->hfontLabel, FALSE, SendMessage);
        ListView_UpdateScrollBars(plv);
    }

    if (plv->hFontHot)
    {
        DeleteObject(plv->hFontHot);
        plv->hFontHot = NULL;
    }

    CCGetHotFont(plv->hfontLabel, &plv->hFontHot);
    plv->iFreeSlot = -1;

    if (fRedraw)
        RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
}

HFONT ListView_OnGetFont(LV* plv)
{
    return plv->hfontLabel;
}

// This function process the WM_SETREDRAW message by setting or clearing
// a bit in the listview structure, which several places in the code will
// check...
//
// REVIEW: Should probably forward to DefWindowProc()
//
void ListView_OnSetRedraw(LV* plv, BOOL fRedraw)
{
    if (fRedraw)
    {
        BOOL fChanges = FALSE;
        // Only do work if we're turning redraw back on...
        //
        if (!(plv->flags & LVF_REDRAW))
        {
            plv->flags |= LVF_REDRAW;

            // deal with any accumulated invalid regions
            if (plv->hrgnInval)
            {
                UINT fRedraw = (plv->flags & LVF_ERASE) ? RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW : RDW_UPDATENOW|RDW_INVALIDATE;
                if (plv->hrgnInval == (HRGN)ENTIRE_REGION)
                    plv->hrgnInval = NULL;

                RedrawWindow(plv->ci.hwnd, NULL, plv->hrgnInval, fRedraw);
                ListView_DeleteHrgnInval(plv);
                fChanges = TRUE;
            }
            plv->flags &= ~LVF_ERASE;


            // Turning redraw on recomputes listview.
            if (plv->fGroupView)
            {
                _ListView_RecomputeEx(plv, NULL, 0, TRUE);
            }

            if (plv->fGroupView || ListView_IsDoubleBuffer(plv))
                InvalidateRect(plv->ci.hwnd, NULL, TRUE);


            // now deal with the optimized stuff
            if (ListView_IsListView(plv) || 
                ListView_IsReportView(plv))
            {
                if (plv->iFirstChangedNoRedraw != -1)
                {
                    // We may try to resize the column
                    if (!ListView_MaybeResizeListColumns(plv, plv->iFirstChangedNoRedraw,
                            ListView_Count(plv)-1))
                        ListView_OnUpdate(plv, plv->iFirstChangedNoRedraw);
                }
                else
                    ListView_UpdateScrollBars(plv);
            } 
            else 
            {
                int iCount;

                if (plv->iFirstChangedNoRedraw != -1) 
                {
                    for (iCount = ListView_Count(plv) ; plv->iFirstChangedNoRedraw < iCount; plv->iFirstChangedNoRedraw++) 
                    {
                        ListView_InvalidateItem(plv, plv->iFirstChangedNoRedraw, FALSE, RDW_INVALIDATE);
                    }
                    
                    fChanges = TRUE;
                }

                if (fChanges)
                {
                    ListView_RecalcRegion(plv, TRUE, TRUE);
                }

                if (((plv->ci.style & LVS_AUTOARRANGE) ||(plv->exStyle & LVS_EX_SNAPTOGRID)) && fChanges) 
                {
                    ListView_OnUpdate(plv, plv->iFirstChangedNoRedraw);
                } 
                else 
                {
                    ListView_UpdateScrollBars(plv);
                }
            }
        }
    }
    else
    {
        plv->iFirstChangedNoRedraw = -1;
        plv->flags &= ~LVF_REDRAW;
    }
}

HIMAGELIST ListView_OnGetImageList(LV* plv, int iImageList)
{
    switch (iImageList)
    {
        case LVSIL_NORMAL:
            return plv->himl;

        case LVSIL_SMALL:
            return plv->himlSmall;

        case LVSIL_STATE:
            return plv->himlState;
    }
    RIPMSG(0, "ListView_GetImageList: Invalid Imagelist asked for");
    return NULL;
}

HIMAGELIST ListView_OnSetImageList(LV* plv, HIMAGELIST himl, int iImageList)
{
    HIMAGELIST hImageOld = NULL;
    BOOL fImageSizeChanged = FALSE; //Assume the size hasn't changed!
    
    switch (iImageList)
    {
        case LVSIL_NORMAL:
            hImageOld = plv->himl;
            plv->himl = himl;
            if (himl) 
            {
                int cxIconNew, cyIconNew;
                //Get the Icon sizes from the new image list.
                if (CCGetIconSize(&plv->ci, himl, &cxIconNew , &cyIconNew))
                {
                    //Check to see if the sizes have changed!
                    if((cxIconNew != plv->cxIcon) || (cyIconNew != plv->cyIcon))
                    {
                        fImageSizeChanged = TRUE;
                        plv->cxIcon = cxIconNew;
                        plv->cyIcon = cyIconNew;
                    }
                }
            
                if (fImageSizeChanged && (!(plv->flags & LVF_ICONSPACESET))) 
                {
                    ListView_OnSetIconSpacing(plv, (LPARAM)-1);
                }
            }
            break;

        case LVSIL_SMALL:
            hImageOld = plv->himlSmall;
            plv->himlSmall = himl;
            if (himl)
            {
                int cxSmIconNew, cySmIconNew;
                //Get the small icon sizes from the new image list.
                if(CCGetIconSize(&plv->ci, himl, &cxSmIconNew , &cySmIconNew))
                {
                    //Check to see if the sizes have changed!
                    if((cxSmIconNew != plv->cxSmIcon) || (cySmIconNew != plv->cySmIcon))
                    {
                        fImageSizeChanged = TRUE;
                        plv->cxSmIcon = cxSmIconNew;
                        plv->cySmIcon = cySmIconNew;
                    }
                }
            }

            if (fImageSizeChanged)
            {
                plv->cxItem = ListView_ComputeCXItemSize(plv);

                // After changing the imagelist, try to resize the columns, because we can't
                // guess what the new size is going to be. Discovered by Thumbview 
                ListView_MaybeResizeListColumns(plv, 0, ListView_Count(plv)-1);
                plv->cyItem = ListView_ComputeCYItemSize(plv);
            }

            if (plv->hwndHdr)
                SendMessage(plv->hwndHdr, HDM_SETIMAGELIST, 0, (LPARAM)himl);
            break;

        case LVSIL_STATE:
            fImageSizeChanged = TRUE;
            if (himl) 
            {
                CCGetIconSize(&plv->ci, himl, &plv->cxState , &plv->cyState);
            }
            else 
            {
                plv->cxState = 0;
            }
            hImageOld = plv->himlState;
            plv->himlState = himl;
            plv->cyItem = ListView_ComputeCYItemSize(plv);
            break;

        default:
            fImageSizeChanged = TRUE;
            TraceMsg(TF_LISTVIEW, "sh TR - LVM_SETIMAGELIST: unrecognized iImageList");
            break;
    }

    if (himl && !(plv->ci.style & LVS_SHAREIMAGELISTS))
        ImageList_SetBkColor(himl, plv->clrBk);

    // Imagelist size changed... if we're in tileview, we need to recalculate the tilesize.
    if (ListView_IsTileView(plv) && (iImageList == LVSIL_STATE || iImageList == LVSIL_NORMAL))
    {
        ListView_RecalcTileSize(plv);
    }

    if(fImageSizeChanged)
    {
        // Now, recompute!
        plv->rcView.left = RECOMPUTE; // invalidate this up front to avoid the asserts - it'll get recalculated anyway
        _ListView_RecomputeEx(plv, NULL, 0, TRUE);
    }

    if (ListView_Count(plv) > 0)
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);

    return hImageOld;
}

BOOL ListView_OnGetItemA(LV* plv, LV_ITEMA *plvi) 
{
    LPWSTR pszW = NULL;
    LPSTR pszC = NULL;
    BOOL fRet;

    //HACK ALERT -- this code assumes that LV_ITEMA is exactly the same
    // as LV_ITEMW except for the pointer to the string.
    COMPILETIME_ASSERT(sizeof(LV_ITEMA) == sizeof(LV_ITEMW))

    if (!plvi)
        return FALSE;

    if ((plvi->mask & LVIF_TEXT) && (plvi->pszText != NULL)) 
    {
        pszC = plvi->pszText;
        pszW = LocalAlloc(LMEM_FIXED, plvi->cchTextMax * sizeof(WCHAR));
        if (pszW == NULL)
            return FALSE;
        plvi->pszText = (LPSTR)pszW;
    }

    fRet = ListView_OnGetItem(plv, (LV_ITEM *) plvi);

    if (pszW)
    {
        if (plvi->pszText != LPSTR_TEXTCALLBACKA)
        {
            if (fRet && plvi->cchTextMax)
                ConvertWToAN(plv->ci.uiCodePage, pszC, plvi->cchTextMax, (LPWSTR)plvi->pszText, -1);
            plvi->pszText = pszC;
        }

        LocalFree(pszW);
    }

    return fRet;

}

BOOL ListView_OnGetItem(LV* plv, LV_ITEM* plvi)
{
    UINT mask;
    LISTITEM* pitem = NULL;
    LV_DISPINFO nm;

    if (!plvi)
    {
        RIPMSG(0, "LVM_GET(ITEM|ITEMTEXT): Invalid pitem = NULL");
        return FALSE;
    }

    if (!ListView_IsValidItemNumber(plv, plvi->iItem))
    {
#ifdef DEBUG
        // owner data views (e.g. docfind) may change the number of items in listview
        // while we are doing something, thus hitting this rip
        if (!ListView_IsOwnerData(plv))
            RIPMSG(0, "LVM_GET(ITEM|ITEMTEXT|ITEMSTATE): item=%d does not exist", plvi->iItem);
#endif
        return FALSE;
    }

    nm.item.mask = 0;
    mask = plvi->mask;

    if (!ListView_IsOwnerData(plv))
    {
        // Standard listviews
        pitem = ListView_FastGetItemPtr(plv, plvi->iItem);
        ASSERT(pitem);

        // Handle sub-item cases for report view
        //
        if (plvi->iSubItem != 0)
        {
            LISTSUBITEM lsi;

            ListView_GetSubItem(plv, plvi->iItem, plvi->iSubItem, &lsi);
            if (mask & LVIF_TEXT)
            {
                if (lsi.pszText != LPSTR_TEXTCALLBACK)
                {
                    Str_GetPtr0(lsi.pszText, plvi->pszText, plvi->cchTextMax);
                } 
                else 
                {
                    // if this is LVIF_NORECOMPUTE we will update pszText later
                    nm.item.mask |= LVIF_TEXT;
                }
            }

            if ((mask & LVIF_IMAGE) && (plv->exStyle & LVS_EX_SUBITEMIMAGES))
            {
                plvi->iImage = lsi.iImage;
                if (lsi.iImage == I_IMAGECALLBACK)
                    nm.item.mask |= LVIF_IMAGE;
            }

            if (mask & LVIF_STATE) 
            {

                if (ListView_FullRowSelect(plv)) 
                {
                    // if we're in full row select,
                    // the state bit for select and focus follows column 0.
                    lsi.state |= pitem->state & (LVIS_SELECTED | LVIS_FOCUSED | LVIS_DROPHILITED);
                }

                plvi->state = lsi.state & plvi->stateMask;


                if (plv->stateCallbackMask)
                {
                    nm.item.stateMask = (plvi->stateMask & plv->stateCallbackMask);
                    if (nm.item.stateMask)
                    {
                        nm.item.mask |= LVIF_STATE;
                        nm.item.state = 0;
                    }
                }
            }
        } 
        else 
        {
            if (mask & LVIF_TEXT)
            {
                if (pitem->pszText != LPSTR_TEXTCALLBACK)
                {
                    Str_GetPtr0(pitem->pszText, plvi->pszText, plvi->cchTextMax);
                } 
                else 
                {
                    // if this is LVIF_NORECOMPUTE we will update pszText later
                    nm.item.mask |= LVIF_TEXT;
                }
            }

            if (mask & LVIF_IMAGE)
            {
                plvi->iImage = pitem->iImage;
                if (pitem->iImage == I_IMAGECALLBACK)
                    nm.item.mask |= LVIF_IMAGE;
            }

            if (mask & LVIF_INDENT)
            {
                plvi->iIndent = pitem->iIndent;
                if (pitem->iIndent == I_INDENTCALLBACK)
                    nm.item.mask |= LVIF_INDENT;
            }

            if (mask & LVIF_STATE)
            {
                plvi->state = (pitem->state & plvi->stateMask);

                if (plv->stateCallbackMask)
                {
                    nm.item.stateMask = (plvi->stateMask & plv->stateCallbackMask);
                    if (nm.item.stateMask)
                    {
                        nm.item.mask |= LVIF_STATE;
                        nm.item.state = 0;
                    }
                }
            }

            if (mask & LVIF_GROUPID)
            {
                if (LISTITEM_HASGROUP(pitem))
                {
                    plvi->iGroupId = pitem->pGroup->iGroupId;
                }
                else
                {
                    nm.item.mask |= LVIF_GROUPID;
                }
            }

            if (mask & LVIF_COLUMNS)
            {
                if ((plvi->puColumns == NULL) || (plvi->cColumns > CCMAX_TILE_COLUMNS))
                {
                    return FALSE;
                }

                if (pitem->cColumns == I_COLUMNSCALLBACK)
                {
                    nm.item.mask |= LVIF_COLUMNS;
                }
                else
                {
                    plvi->cColumns = pitem->cColumns;
                    if (plvi->cColumns < pitem->cColumns)
                    {
                        // Not enough room to store the columns
                        return FALSE;
                    }

                    // Copy the array
                    if (plvi->puColumns && pitem->puColumns)
                    {
                        CopyMemory(plvi->puColumns, pitem->puColumns, plvi->cColumns * sizeof(UINT));
                    }
                }
            }
        }

        if (mask & LVIF_PARAM)
        {
            plvi->lParam = pitem->lParam;
        }
    }
    else
    {
        // Complete call back for info...

        // Handle sub-item cases for report view
        //
        if (plvi->iSubItem != 0)
        {
            // if there are no subitem images, don't query for them
            if (!(plv->exStyle & LVS_EX_SUBITEMIMAGES))
                mask &= ~LVIF_IMAGE;

            // don't allow indent on the non-0th column
            mask &= ~LVIF_INDENT;
        }

        if (mask & LVIF_PARAM)
            plvi->lParam = 0L;      // Dont have any to return now...

        if (mask & LVIF_STATE)
        {
            plvi->state = 0;

            if ((plvi->iSubItem == 0) || ListView_FullRowSelect(plv))
            {
                if (plvi->iItem == plv->iFocus)
                    plvi->state |= LVIS_FOCUSED;

                if (plv->plvrangeSel->lpVtbl->IsSelected(plv->plvrangeSel, plvi->iItem) == S_OK)
                    plvi->state |= LVIS_SELECTED;

                if (plv->plvrangeCut->lpVtbl->IsSelected(plv->plvrangeCut, plvi->iItem) == S_OK)
                    plvi->state |= LVIS_CUT;

                if (plvi->iItem == plv->iDropHilite)
                    plvi->state |= LVIS_DROPHILITED;

                plvi->state &= plvi->stateMask;
            }

            if (plv->stateCallbackMask)
            {
                nm.item.stateMask = (plvi->stateMask & plv->stateCallbackMask);
                if (nm.item.stateMask)
                {
                    nm.item.mask |= LVIF_STATE;
                    nm.item.state = 0;
                }
            }
        }

        if (mask & LVIF_COLUMNS)
        {
            nm.item.mask |= LVIF_COLUMNS;
        }

        nm.item.mask |= (mask & (LVIF_TEXT | LVIF_IMAGE | LVIF_INDENT));
    }

    if (mask & LVIF_NORECOMPUTE)
    {
        if (nm.item.mask & LVIF_TEXT)
            plvi->pszText = LPSTR_TEXTCALLBACK;

        if (nm.item.mask & LVIF_COLUMNS)
            plvi->cColumns = I_COLUMNSCALLBACK;
    }
    else if (nm.item.mask)
    {
        UINT rguColumns[CCMAX_TILE_COLUMNS];
        nm.item.iItem  = plvi->iItem;
        nm.item.iSubItem = plvi->iSubItem;
        if (ListView_IsOwnerData(plv))
            nm.item.lParam = 0L;
        else
            nm.item.lParam = pitem->lParam;

        // just in case LVIF_IMAGE is set and callback doesn't fill it in
        // ... we'd rather have a -1 than whatever garbage is on the stack
        nm.item.iImage = -1;
        nm.item.iIndent = 0;
        if (nm.item.mask & LVIF_TEXT)
        {
            RIPMSG(plvi->pszText != NULL, "LVM_GET(ITEM|ITEMTEXT) null string pointer");

            if (plvi->pszText)
            {
                nm.item.pszText = plvi->pszText;
                nm.item.cchTextMax = plvi->cchTextMax;

                // Make sure the buffer is zero terminated...
                if (nm.item.cchTextMax)
                    *nm.item.pszText = 0;
            }
            else
            {
                // Don't make caller smash null pointer
                nm.item.mask &= ~LVIF_TEXT;
            }
        }

        if (nm.item.mask & LVIF_COLUMNS)
        {
            nm.item.cColumns = plvi->cColumns;
            nm.item.puColumns = rguColumns;

            if (plvi->puColumns && plvi->cColumns && plvi->cColumns < ARRAYSIZE(rguColumns))
            {
                CopyMemory(rguColumns, plvi->puColumns, sizeof(UINT) * plvi->cColumns);
            }
        }

        CCSendNotify(&plv->ci, LVN_GETDISPINFO, &nm.hdr);

        // use nm.item.mask to give the app a chance to change values
        if (nm.item.mask & LVIF_INDENT)
            plvi->iIndent = nm.item.iIndent;
        if (nm.item.mask & LVIF_GROUPID)
        {
            if (pitem)
            {
                if (nm.item.iGroupId == I_GROUPIDNONE)
                {
                    ListView_RemoveItemFromItsGroup(plv, pitem);
                    LISTITEM_SETASKEDFORGROUP(pitem);
                }
                else
                {
                    LISTGROUP* pgrp = ListView_FindGroupFromID(plv, nm.item.iGroupId, NULL);

                    if (pgrp != pitem->pGroup)
                    {
                        ListView_RemoveItemFromItsGroup(plv, pitem);

                        pitem->pGroup = pgrp;
                        if (pgrp)
                        {
                            DPA_AppendPtr(pgrp->hdpa, pitem);
                        }
                    }
                }
            }
            plvi->iGroupId = nm.item.iGroupId;
        }

        if (nm.item.mask & LVIF_STATE)
            plvi->state ^= ((plvi->state ^ nm.item.state) & nm.item.stateMask);
        if (nm.item.mask & LVIF_IMAGE)
            plvi->iImage = nm.item.iImage;
        if (nm.item.mask & LVIF_TEXT)
            plvi->pszText = CCReturnDispInfoText(nm.item.pszText, plvi->pszText, plvi->cchTextMax);
        if (nm.item.mask & LVIF_COLUMNS)
        {
            // Put the # of columns back in the LV_ITEM struct.  Don't need to
            // do anything with puColumns.

            UINT cColumns = (nm.item.cColumns == I_COLUMNSCALLBACK) ? 0 : nm.item.cColumns;
            UINT cColumnsToCopy = min(cColumns, plvi->cColumns);

            // Copy rguColumns back into the thing we were passed.
            CopyMemory(plvi->puColumns, rguColumns, sizeof(UINT) * cColumnsToCopy);

            plvi->cColumns = cColumnsToCopy;
        }

        if (pitem && (nm.item.mask & LVIF_DI_SETITEM))
        {

            //
            // The SendNotify above can set about a terrible series of events
            // whereby asking for DISPINFO causes the shell to look around
            // (call peekmessage) to see if its got a new async icon for the
            // listview.  This lets other messages be delivered, such as an
            // UPDATEIMAGE of Index == -1 (if the user is changing icon sizing
            // at the same time).  This causes a re-enumeration of the desktop
            // and hence this very listview is torn down and rebuilt while
            // we're sitting here for the DISPINFO to finish.  Thus, as a cheap
            // and dirty solution, I check to see if the item I think I have
            // is the same one I had when I made the notify, and if not, I
            // bail.  Don't blame me, I'm just cleaning up the mess.

            if (pitem != ListView_GetItemPtr(plv, plvi->iItem))
            {
                return FALSE;
            }

            if (nm.item.iSubItem == 0)
            {
                //DebugMsg(TF_LISTVIEW, "SAVING ITEMS!");
                if (nm.item.mask & LVIF_IMAGE)
                    pitem->iImage = (short) nm.item.iImage;

                if (nm.item.mask & LVIF_INDENT)
                    pitem->iIndent = (short) nm.item.iIndent;

                if (nm.item.mask & LVIF_TEXT)
                    if (nm.item.pszText)
                    {
                        Str_Set(&pitem->pszText, nm.item.pszText);
                    }

                if (nm.item.mask & LVIF_STATE)
                    pitem->state ^= ((pitem->state ^ nm.item.state) & nm.item.stateMask);

                if (nm.item.mask & LVIF_COLUMNS)
                {
                    Tile_Set(&pitem->puColumns, &pitem->cColumns, nm.item.puColumns, nm.item.cColumns);

                    // Just did a Tile_Set - need to recompute.
                    ListView_SetSRecompute(pitem);
                }
            }
            else
            {
                ListView_SetSubItem(plv, &nm.item);
            }
        }
    }

    return TRUE;
}

BOOL ListView_OnSetItemA(LV* plv, LV_ITEMA* plvi) 
{
    LPWSTR pszW = NULL;
    LPSTR pszC = NULL;
    BOOL fRet;

    // Let ListView_OnSetItem() handle owner-data validation

    //HACK ALERT -- this code assumes that LV_ITEMA is exactly the same
    // as LV_ITEMW except for the pointer to the string.
    COMPILETIME_ASSERT(sizeof(LV_ITEMA) == sizeof(LV_ITEMW));

    if (!plvi)
        return FALSE;

    if ((plvi->mask & LVIF_TEXT) && (plvi->pszText != NULL)) 
    {
        pszC = plvi->pszText;
        pszW = ProduceWFromA(plv->ci.uiCodePage, pszC);
        if (pszW == NULL)
            return FALSE;
        plvi->pszText = (LPSTR)pszW;
    }

    fRet = ListView_OnSetItem(plv, (const LV_ITEM*) plvi);

    if (pszW != NULL) 
    {
        plvi->pszText = pszC;

        FreeProducedString(pszW);
    }
    return fRet;
}

BOOL ListView_OnSetItem(LV* plv, const LV_ITEM* plvi)
{
    LISTITEM* pitem = NULL;
    UINT mask;
    UINT maskChanged;
    UINT rdwFlags=RDW_INVALIDATE;
    int i;
    UINT stateOld, stateNew;
    BOOL fFocused = FALSE;
    BOOL fSelected = FALSE;
    BOOL fStateImageChanged = FALSE;
    
    if (ListView_IsOwnerData(plv)) 
    {
        RIPMSG(0, "LVM_SETITEM: Invalid for owner-data listview");
        return FALSE;
    }
    
    if (!plvi)
        return FALSE;
    
    RIPMSG(plvi->iSubItem >= 0, "ListView_OnSetItem: Invalid item index");
    
    if (plv->himl && (plv->clrBk != ImageList_GetBkColor(plv->himl)))
        rdwFlags |= RDW_ERASE;
    
    mask = plvi->mask;
    if (!mask)
        return TRUE;
    
    // If we're setting a subitem, handle it elsewhere...
    //
    if (plvi->iSubItem > 0)
        return ListView_SetSubItem(plv, plvi);
    
    i = plvi->iItem;
    
    pitem = ListView_GetItemPtr(plv, i);
    if (!pitem)
        return FALSE;
    
    //REVIEW: This is a BOGUS HACK, and should be fixed.
    //This incorrectly calculates the old state (since we may
    // have to send LVN_GETDISPINFO to get it).
    //
    stateOld = stateNew = 0;
    if (mask & LVIF_STATE)
    {
        stateOld = pitem->state & plvi->stateMask;
        stateNew = plvi->state & plvi->stateMask;
    }
    
    // Prevent multiple selections in a single-select listview.
    if ((plv->ci.style & LVS_SINGLESEL) && (mask & LVIF_STATE) && (stateNew & LVIS_SELECTED))
    {
        ListView_DeselectAll(plv, i);
        
        // Refresh the old state information
        stateOld = pitem->state & plvi->stateMask;
    }
    
    if (!ListView_SendChange(plv, i, 0, LVN_ITEMCHANGING, stateOld, stateNew, mask, pitem->lParam))
        return FALSE;
    
    maskChanged = 0;
    
    if (mask & LVIF_STATE)
    {
        UINT change = (pitem->state ^ plvi->state) & plvi->stateMask;
        
        if (change)
        {
            pitem->state ^= change;
            
            maskChanged |= LVIF_STATE;
            
            // the selection state has changed.. update selected count
            if (change & LVIS_SELECTED)
            {
                fSelected = TRUE;
                
                if (pitem->state & LVIS_SELECTED) 
                {
                    plv->nSelected++;
                } 
                else 
                {
                    if (plv->nSelected > 0)
                        plv->nSelected--;
                }
            }
            
            // For some bits we can only invert the label area...
            // fSelectOnlyChange = ((change & ~(LVIS_SELECTED | LVIS_FOCUSED | LVIS_DROPHILITED)) == 0);
            // fEraseItem = ((change & ~(LVIS_SELECTED | LVIS_DROPHILITED)) != 0);
            
            // try to steal focus from the previous guy.
            if (change & LVIS_FOCUSED)
            {
                BOOL fUnfolded = ListView_IsItemUnfolded(plv, plv->iFocus);
                int iOldFocus = plv->iFocus;
                RECT rcLabel;
                
                fFocused = TRUE;
                
                if (plv->iFocus != i) 
                {
                    if ((plv->iFocus == -1) || ListView_OnSetItemState(plv, plv->iFocus, 0, LVIS_FOCUSED)) 
                    {
                        ASSERT(pitem->state & LVIS_FOCUSED);
                        plv->iFocus = i;
                        if (plv->iMark == -1)
                            plv->iMark = i;
                    } 
                    else 
                    {
                        fFocused = FALSE;
                        pitem->state &= ~LVIS_FOCUSED;
                    }
                } 
                else
                {
                    ASSERT(!(pitem->state & LVIS_FOCUSED));
                    plv->iFocus = -1;
                }
                
                // If we were previously unfolded and we move the focus we must
                // attempt to refresh the previous focus owner to referect this change.
                
                if (fUnfolded && !ListView_IsItemUnfolded(plv, iOldFocus) && (plv->iItemDrawing != iOldFocus))
                {
                    ListView_GetUnfoldedRect(plv, iOldFocus, &rcLabel);
                    RedrawWindow(plv->ci.hwnd, &rcLabel, NULL, RDW_INVALIDATE|RDW_ERASE);
                }
                
                // Kill the tooltip if focus moves, it causes us headaches otherwise!
                ListView_PopBubble(plv);
            }
            
            if (change & LVIS_CUT ||
                plv->clrTextBk == CLR_NONE)
                rdwFlags |= RDW_ERASE;
            
            if (change & LVIS_OVERLAYMASK) 
            {
                // Overlay changed, so need to blow away icon region cache
                if (pitem->hrgnIcon)
                {
                    if (pitem->hrgnIcon != (HANDLE) -1)
                        DeleteObject(pitem->hrgnIcon);
                    pitem->hrgnIcon = NULL;
                }
            }
            
            fStateImageChanged = (change & LVIS_STATEIMAGEMASK);
            
        }
    }
    
    if (mask & LVIF_TEXT)
    {
        // need to do this now because we're changing the text
        // so we need to get the rect of the thing before the text changes
        // but don't redraw the item we are currently painting
        if (plv->iItemDrawing != i)
        {
            ListView_InvalidateItemEx(plv, i, FALSE,
                RDW_INVALIDATE | RDW_ERASE, LVIF_TEXT);
        }
        
        if (!Str_Set(&pitem->pszText, plvi->pszText))
            return FALSE;
        
        plv->rcView.left = RECOMPUTE;
        ListView_SetSRecompute(pitem);
        maskChanged |= LVIF_TEXT;
    }
    
    if (mask & LVIF_INDENT) 
    {
        if (pitem->iIndent != plvi->iIndent)
        {
            pitem->iIndent = (short) plvi->iIndent;
            maskChanged |= LVIF_INDENT;
            
            if (ListView_IsReportView(plv))
                rdwFlags |= RDW_ERASE;
        }
    }
    
    if (mask & LVIF_IMAGE)
    {
        if (pitem->iImage != plvi->iImage)
        {
            pitem->iImage = (short) plvi->iImage;
            maskChanged |= LVIF_IMAGE;
            
            if (pitem->hrgnIcon) 
            {
                if (pitem->hrgnIcon != (HANDLE) -1)
                    DeleteObject(pitem->hrgnIcon);
                pitem->hrgnIcon = NULL;
            }
            
            // erase if there was a set image
            if (pitem->iImage != I_IMAGECALLBACK)
                rdwFlags |= RDW_ERASE;
        }
    }
    
    if (mask & LVIF_PARAM)
    {
        if (pitem->lParam != plvi->lParam)
        {
            pitem->lParam = plvi->lParam;
            maskChanged |= LVIF_PARAM;
        }
    }
    
    if (mask & LVIF_GROUPID)
    {
        LISTGROUP* pgrp = ListView_FindGroupFromID(plv, plvi->iGroupId, NULL);
        if (pgrp)
        {
            if (pitem->pGroup != pgrp)
            {
                ListView_RemoveItemFromItsGroup(plv, pitem);
                pitem->pGroup = pgrp;
                DPA_AppendPtr(pgrp->hdpa, pitem);
                
                if (ListView_RedrawEnabled(plv))
                {
                    _ListView_RecomputeEx(plv, NULL, 0, FALSE);
                    InvalidateRect(plv->ci.hwnd, NULL, TRUE);
                }
                
                maskChanged |= LVIF_GROUPID;
            }
        }
    }
    
    if (mask & LVIF_COLUMNS)
    {
        UINT uNumColumns = (plvi->cColumns == I_COLUMNSCALLBACK) ? 0 : plvi->cColumns;
        
        if (((uNumColumns > 0) && (plvi->puColumns == NULL)) || // Didn't provide any columns
            (uNumColumns > CCMAX_TILE_COLUMNS))                   // Provided too many 
        {
            return FALSE; // See note below about premature return.
        }
        
        if (!Tile_Set(&pitem->puColumns, &pitem->cColumns, plvi->puColumns, plvi->cColumns))
            return FALSE;
        // Note: if we fail here, we may have still set the LVIF_TEXT above...
        // so the call partially succeeded. Oh well, no way to undo that.
        
        maskChanged |= LVIF_COLUMNS;
        
        // Columns changed - need to recompute this guy.
        ListView_SetSRecompute(pitem);
    }
    
    if (maskChanged)
    {
        // don't redraw the item we are currently painting
        if (plv->iItemDrawing != i)
            ListView_InvalidateItemEx(plv, i, FALSE, rdwFlags, maskChanged);
        
        TraceMsg(DM_LVSENDCHANGE, "LV - SendChange %d %d %d %d", i, stateOld, stateNew, maskChanged);
        ListView_SendChange(plv, i, 0, LVN_ITEMCHANGED, stateOld, stateNew, maskChanged, pitem->lParam);
        
        if (maskChanged & LVIF_TEXT)
            NotifyWinEvent(EVENT_OBJECT_NAMECHANGE, plv->ci.hwnd, OBJID_CLIENT, i+1);
        
        if (maskChanged & LVIF_STATE)
        {
            if (fFocused)
                ListView_NotifyFocusEvent(plv);
            
            if (fSelected)
            {
                if (stateNew & LVIS_SELECTED)
                {
                    NotifyWinEvent((plv->nSelected == 1) ? EVENT_OBJECT_SELECTION :
                EVENT_OBJECT_SELECTIONADD, plv->ci.hwnd, OBJID_CLIENT, i+1);
                }
                else
                {
                    NotifyWinEvent(EVENT_OBJECT_SELECTIONREMOVE, plv->ci.hwnd, OBJID_CLIENT, i+1);
                }
            }
            
            if (fStateImageChanged)
                NotifyWinEvent(EVENT_OBJECT_STATECHANGE, plv->ci.hwnd, OBJID_CLIENT, i+1);
        }
    }
    
    return TRUE;
}

UINT ListView_OnGetItemState(LV* plv, int i, UINT mask)
{
    LV_ITEM lvi;

    lvi.mask = LVIF_STATE;
    lvi.stateMask = mask;
    lvi.iItem = i;
    lvi.iSubItem = 0;
    if (!ListView_OnGetItem(plv, &lvi))
        return 0;

    return lvi.state;
}


BOOL ListView_OnSetItemState(LV* plv, int i, UINT data, UINT mask)
{
    UINT rdwFlags = RDW_INVALIDATE;
    LV_ITEM lvi;

    lvi.mask    = LVIF_STATE;
    lvi.state   = data;
    lvi.stateMask = mask;
    lvi.iItem   = i;
    lvi.iSubItem = 0;

    // if the item is -1, we will do it for all items.  We special case
    // a few cases here as to speed it up.  For example if the mask is
    // LVIS_SELECTED and data is zero it implies that we will deselect
    // all items...
    //
    if (ListView_IsOwnerData(plv))
    {
        UINT uOldData = 0;

        // these are the only two we handled
        mask &= (LVIS_SELECTED | LVIS_FOCUSED | LVIS_CUT | LVIS_DROPHILITED);
        if (!mask)
            return TRUE;

        if (plv->clrTextBk == CLR_NONE || 
            (plv->himl && (plv->clrBk != ImageList_GetBkColor(plv->himl))))
        {
            rdwFlags |= RDW_ERASE;
        }

        if (i == -1)
        {
            // request selection state change for all
            if (mask & LVIS_SELECTED)
            {
                if (data & LVIS_SELECTED)
                {  // set selection
                    if ((plv->ci.style & LVS_SINGLESEL))
                    {   // cant make multiple selections in a single-select listview.
                        return FALSE;
                    }

                    if (plv->cTotalItems)
                    {
                        if (FAILED(plv->plvrangeSel->lpVtbl->IncludeRange(plv->plvrangeSel, 0, plv->cTotalItems - 1)))
                            return FALSE;
                    }

                    RedrawWindow(plv->ci.hwnd, NULL, NULL, rdwFlags);
                }
                else
                {  // clear selection
                    if (plv->nSelected > 0) 
                    {
                        ListView_InvalidateSelectedOrCutOwnerData(plv, plv->plvrangeSel);
                        if (FAILED(plv->plvrangeSel->lpVtbl->Clear(plv->plvrangeSel)))
                            return FALSE;
                    } 
                    else 
                    {
                        // if nothing was selected, then there's nothing to clear
                        // no change.
                        mask &= ~ LVIS_SELECTED;
                    }
                }
                uOldData |= (LVIS_SELECTED & (mask ^ data));

                // Update our internal count to what the list thinks is the number selected...
                plv->plvrangeSel->lpVtbl->CountIncluded(plv->plvrangeSel, &plv->nSelected);
            }

            // can maybe combine with above code...
            if (mask & LVIS_CUT)
            {
                if (data & LVIS_CUT)
                {  // set selection

                    if (plv->cTotalItems)
                        if (FAILED(plv->plvrangeCut->lpVtbl->IncludeRange(plv->plvrangeCut, 0, plv->cTotalItems - 1)))
                            return FALSE;

                    RedrawWindow(plv->ci.hwnd, NULL, NULL, rdwFlags);

                }
                else
                {  // clear selection
                    if (plv->plvrangeCut->lpVtbl->IsEmpty(plv->plvrangeCut) != S_OK) 
                    {
                        ListView_InvalidateSelectedOrCutOwnerData(plv, plv->plvrangeCut);
                        if (FAILED(plv->plvrangeCut->lpVtbl->Clear(plv->plvrangeCut)))
                            return FALSE;
                    }
                    else 
                    {
                        // if nothing was selected, then there's nothing to clear
                        // no change.
                        mask &= ~ LVIS_CUT;
                    }
                }
                uOldData |= (LVIS_CUT & (mask ^ data));
            }

            // request focus state change
            if (mask & LVIS_FOCUSED)
            {
                if (data & LVIS_FOCUSED)
                {  // cant set focus to all
                    return FALSE;
                }
                else if (plv->iFocus != -1)
                {
                    int iOldFocus = plv->iFocus;
                    // clear focus
                    uOldData |= (LVIS_FOCUSED & (mask ^ data));
                    plv->iFocus = -1;
                    // notify that the old focus is being lost
                    DebugMsg(DM_LVSENDCHANGE, TEXT("VLV: LVN_ITEMCHANGED: %d %d %d"), iOldFocus, LVIS_FOCUSED, 0);
                    ListView_SendChange(plv, iOldFocus, 0, LVN_ITEMCHANGED, LVIS_FOCUSED, 0, LVIF_STATE, 0);
                    ListView_InvalidateFoldedItem(plv, iOldFocus, TRUE, RDW_INVALIDATE |RDW_ERASE);
                }
            }

            if (mask & LVIS_DROPHILITED)
            {
                if (data & LVIS_DROPHILITED)
                {  // cant set focus to all
                    return FALSE;
                }
                else if (plv->iDropHilite != -1)
                {
                    int iOldDropHilite = plv->iDropHilite;
                    // clear focus
                    uOldData |= (LVIS_FOCUSED & (mask ^ data));
                    plv->iDropHilite = -1;
                    // notify that the old focus is being lost
                    ListView_SendChange(plv, iOldDropHilite, 0, LVN_ITEMCHANGED, LVIS_DROPHILITED, 0, LVIF_STATE, 0);
                    ListView_InvalidateFoldedItem(plv, iOldDropHilite, TRUE, RDW_INVALIDATE |RDW_ERASE);
                }
            }

            // invalidate and notify if there was a change
            if (uOldData ^ (data & mask)) 
            {
                DebugMsg(DM_LVSENDCHANGE, TEXT("VLV: LVN_ITEMCHANGED: %d %d %d"), i, uOldData, data);
                ListView_SendChange(plv, i, 0, LVN_ITEMCHANGED, uOldData, data, LVIF_STATE, 0);

                if (mask & LVIS_SELECTED)
                {
                    // Tell accessibility, "Selection changed in a complex way"
                    // (There is no "select all" or "select none" notification)
                    NotifyWinEvent(EVENT_OBJECT_SELECTIONWITHIN, plv->ci.hwnd, OBJID_CLIENT, CHILDID_SELF);
                }
            }
        }
        else
        {
            if (!ListView_IsValidItemNumber(plv, i))
                return FALSE;

            // request selection state change
            // and the selection state is new...
            if ((mask & LVIS_SELECTED)) 
            {
                if (((plv->plvrangeSel->lpVtbl->IsSelected(plv->plvrangeSel, i) == S_OK) ? LVIS_SELECTED : 0) ^ (data & LVIS_SELECTED))
                {
                    if (data & LVIS_SELECTED)
                    {  // set selection
                        if ((plv->ci.style & LVS_SINGLESEL))
                        {
                            // in single selection mode, we need to deselect everything else
                            if (!ListView_OnSetItemState(plv, -1, 0, LVIS_SELECTED))
                                return FALSE;
                        }

                        // now select the new item
                        if (FAILED(plv->plvrangeSel->lpVtbl->IncludeRange(plv->plvrangeSel, i, i)))
                            return FALSE;
                    }
                    else
                    {  // clear selection
                        if (FAILED(plv->plvrangeSel->lpVtbl->ExcludeRange(plv->plvrangeSel, i, i)))
                            return FALSE;
                    }

                    // something actually changed (or else we wouldn't be in this
                    // if block
                    uOldData |= (LVIS_SELECTED & (mask ^ data));
                }
                else
                {
                    // nothing changed... so make the uOldData be the same for this bit
                    // else make this the same as
                    uOldData |= (LVIS_SELECTED & (mask & data));
                }

                // Update our internal count to what the list thinks is the number selected...
                plv->plvrangeSel->lpVtbl->CountIncluded(plv->plvrangeSel, &plv->nSelected);
            }

            if ((mask & LVIS_CUT)) 
            {
                if (((plv->plvrangeCut->lpVtbl->IsSelected(plv->plvrangeCut, i) == S_OK) ? LVIS_CUT : 0) ^ (data & LVIS_CUT))
                {
                    if (data & LVIS_CUT)
                    {
                        // now select the new item
                        if (FAILED(plv->plvrangeCut->lpVtbl->IncludeRange(plv->plvrangeCut, i, i)))
                            return FALSE;
                    }
                    else
                    {  // clear selection
                        if (FAILED(plv->plvrangeCut->lpVtbl->ExcludeRange(plv->plvrangeCut, i, i)))
                            return FALSE;
                    }
                    // something actually changed (or else we wouldn't be in this
                    // if block
                    uOldData |= (LVIS_CUT & (mask ^ data));
                    rdwFlags |= RDW_ERASE;
                }
                else
                {
                    // nothing changed... so make the uOldData be the same for this bit
                    // else make this the same as
                    uOldData |= (LVIS_CUT & (mask & data));
                }
            }

            // request focus state change
            if (mask & LVIS_FOCUSED)
            {
                int iOldFocus = plv->iFocus;

                if (data & LVIS_FOCUSED)
                {  // set focus
                    if (i != plv->iFocus)
                    {
                        // we didn't have the focus before
                        plv->iFocus = i;
                        if (plv->iMark == -1)
                            plv->iMark = i;
                        if (iOldFocus != -1)
                        {

                            // we're stealing it from someone
                            // notify of the change
                            DebugMsg(DM_LVSENDCHANGE, TEXT("VLV: LVN_ITEMCHANGED: %d %d %d"), iOldFocus, LVIS_FOCUSED, 0);
                            ListView_SendChange(plv, iOldFocus, 0, LVN_ITEMCHANGED, LVIS_FOCUSED, 0, LVIF_STATE, 0);

                        }
                    }
                    else
                    {
                        // we DID have the focus before
                        uOldData |= LVIS_FOCUSED;
                    }
                }
                else
                {  // clear focus
                    if (i == plv->iFocus)
                    {
                        plv->iFocus = -1;
                        uOldData |= LVIS_FOCUSED;
                    }
                }
            }

            // request focus state change
            if (mask & LVIS_DROPHILITED)
            {
                int iOldDropHilite = plv->iDropHilite;

                if (data & LVIS_DROPHILITED)
                {  // set Drop Hilite
                    if (i != plv->iDropHilite)
                    {
                        // we didn't have the Drop Hilite before
                        plv->iDropHilite = i;
                        if (iOldDropHilite != -1) 
                        {
                            // we're stealing it from someone
                            // notify of the change
                            ListView_SendChange(plv, iOldDropHilite, 0, LVN_ITEMCHANGED, LVIS_DROPHILITED, 0, LVIF_STATE, 0);
                            ListView_InvalidateFoldedItem(plv, iOldDropHilite, TRUE, RDW_INVALIDATE |RDW_ERASE);

                        }
                    }
                    else
                    {
                        // we DID have the Drop Hilite before
                        uOldData |= LVIS_DROPHILITED;
                    }
                }
                else
                {  // clear Drop Hilite
                    if (i == plv->iDropHilite)
                    {
                        plv->iDropHilite = -1;
                        uOldData |= LVIS_DROPHILITED;
                    }
                }
            }

            // invalidate and notify if there was a change
            if (uOldData ^ (data & mask))
            {
                DebugMsg(DM_LVSENDCHANGE, TEXT("VLV: LVN_ITEMCHANGED: %d %d %d"), i, uOldData, data);
                ListView_SendChange(plv, i, 0, LVN_ITEMCHANGED, uOldData, data, LVIF_STATE, 0);
                ListView_InvalidateItem(plv, i, TRUE, rdwFlags);

                // Kill the tooltip if focus moves, it causes us headaches otherwise!
                if ((uOldData ^ (data & mask)) & LVIS_FOCUSED)
                {
                    ListView_PopBubble(plv);
                    ListView_NotifyFocusEvent(plv);
                }

                // Tell accessibility about the changes
                if (mask & LVIS_SELECTED) 
                {
                    UINT event;

                    if (data & LVIS_SELECTED)
                    {
                        if (plv->nSelected == 1)
                            event = EVENT_OBJECT_SELECTION; // this object is the entire selection
                        else
                            event = EVENT_OBJECT_SELECTIONADD; // this object is selected
                    }
                    else
                        event = EVENT_OBJECT_SELECTIONREMOVE; // this object is unselected
                    NotifyWinEvent(event, plv->ci.hwnd, OBJID_CLIENT, i + 1);
                }
            }
        }
    }
    else
    {
        if (i != -1)
        {
            return ListView_OnSetItem(plv, &lvi);
        }
        else
        {
            UINT flags = LVNI_ALL;

            if (data == 0)
            {
                switch (mask)
                {
                case LVIS_SELECTED:
                    flags = LVNI_SELECTED;
                    break;
                case LVIS_CUT:
                    flags = LVNI_CUT;
                    break;
                }
            }
            else if ((plv->ci.style & LVS_SINGLESEL) && (mask == LVIS_SELECTED))
                return FALSE;   /* can't select all in single-select listview */
            else if ((mask & data) & LVIS_FOCUSED) 
            {
                return FALSE; // can't set focus to everything
            }

            //
            // Now iterate over all of the items that match our criteria and
            // set their new value.
            //
            while ((lvi.iItem = ListView_OnGetNextItem(plv, lvi.iItem, flags)) != -1) 
            {
                ListView_OnSetItem(plv, &lvi);
            }
        }
    }
    return TRUE;
}

//
// Returns TRUE if the label of an item is not truncated (is unfolded) and FALSE
// otherwise. If FALSE is returned, it also fills the Unfolding text in pszText.
// If TRUE is returned, pszText is set to empty string.
//
BOOL ListView_IsItemUnfolded2(LV* plv, int iItem, int iSubItem, LPTSTR pszText, int cchTextMax)
{
    BOOL bItemUnfolded = ListView_IsItemUnfolded(plv, iItem);

    if (pszText && cchTextMax > 0)    // Sanity checks on input params.
    {
        pszText[0] = 0;

        if (!bItemUnfolded)
        {
            RECT rcLabel = {0};
            LV_ITEM item;

            item.iItem = iItem;
            item.iSubItem = iSubItem;
            item.mask = LVIF_TEXT | LVIF_PARAM;

            if (ListView_IsTileView(plv))
            {
                TCalculateSubItemRect(plv, NULL, NULL, iItem, iSubItem, NULL, NULL, &bItemUnfolded);
                if (!bItemUnfolded)
                {
                    // Need to supply text.
                    item.pszText = pszText;
                    item.cchTextMax = cchTextMax;
                    ListView_OnGetItem(plv, &item);
                }
            }
            else if (!ListView_IsIconView(plv))
            {
                if (ListView_IsLabelTip(plv) || ListView_IsInfoTip(plv))
                {
                    BOOL fSuccess;

                    rcLabel.left = LVIR_LABEL;

                    if (iSubItem) 
                    {
                        rcLabel.top = iSubItem;
                        fSuccess = ListView_OnGetSubItemRect(plv, iItem, &rcLabel);
                    }
                    else 
                    {
                        fSuccess = ListView_OnGetItemRect(plv, iItem, &rcLabel);
                    }

                    if (fSuccess)
                    {
                        TCHAR szText[INFOTIPSIZE];

                        item.pszText = szText;
                        item.cchTextMax = min(ARRAYSIZE(szText), cchTextMax);
                        if (ListView_OnGetItem(plv, &item) && item.pszText != LPSTR_TEXTCALLBACK)
                        {
                            SIZE siz;
                            LVFAKEDRAW lvfd;
                            int cx;
                            HRESULT hr = E_FAIL;

                            ListView_BeginFakeCustomDraw(plv, &lvfd, &item);
                            ListView_BeginFakeItemDraw(&lvfd);

                            //        ---------Label width----------- ---Client width---
                            cx = min(rcLabel.right - g_cxLabelMargin, plv->sizeClient.cx);

                            hr = GetTextExtentPoint32(lvfd.nmcd.nmcd.hdc, item.pszText, lstrlen(item.pszText), &siz) ? 
                                S_OK : E_FAIL;

                            if (SUCCEEDED(hr) &&
                                (rcLabel.left + g_cxLabelMargin + siz.cx) > cx)
                            {
                                StringCchCopy(pszText, item.cchTextMax, item.pszText);
                            }
                            else
                            {
                                // Not truncated after all
                                bItemUnfolded = TRUE;
                            }

                            ListView_EndFakeItemDraw(&lvfd);
                            ListView_EndFakeCustomDraw(&lvfd);
                        }
                    }
                }
            }
            else
            {
                // Large icon view is the only one that folds
                if (ListView_GetUnfoldedRect(plv, iItem, &rcLabel))
                {
                    item.pszText = pszText;
                    item.cchTextMax = cchTextMax;
                    ListView_OnGetItem(plv, &item);
                }
                else
                {
                    // Item was never folded
                    bItemUnfolded = TRUE;
                }
            }
        }
    }
    return bItemUnfolded;
}


// Rather than thunking to ListView_OnGetItemText, we let ListView_GetItemA
// do the work.

int ListView_OnGetItemTextA(LV* plv, int i, LV_ITEMA *plvi)
{
    if (!plvi)
        return 0;

    RIPMSG(plvi->pszText != NULL, "LVM_GETITEMTEXT null string pointer");

    plvi->mask = LVIF_TEXT;
    plvi->iItem = i;
    if (!ListView_OnGetItemA(plv, plvi))
        return 0;

    return lstrlenA(plvi->pszText);
}

int ListView_OnGetItemText(LV* plv, int i, LV_ITEM *plvi)
{
    if (!plvi)
        return 0;

    RIPMSG(plvi->pszText != NULL, "LVM_GETITEMTEXT null string pointer");

    plvi->mask = LVIF_TEXT;
    plvi->iItem = i;
    if (!ListView_OnGetItem(plv, plvi))
        return 0;

    return lstrlen(plvi->pszText);
}


BOOL WINAPI ListView_OnSetItemTextA(LV* plv, int i, int iSubItem, LPCSTR pszText)
{
    LPWSTR pszW = NULL;
    BOOL fRet;

    // Let ListView_OnSetItemText() handle owner-data validation

    if (pszText != NULL)
    {
        pszW = ProduceWFromA(plv->ci.uiCodePage, pszText);
        if (pszW == NULL)
        {
            return FALSE;
        }
    }

    fRet = ListView_OnSetItemText(plv, i, iSubItem, pszW);

    FreeProducedString(pszW);

    return fRet;
}

BOOL WINAPI ListView_OnSetItemText(LV* plv, int i, int iSubItem, LPCTSTR pszText)
{
    LV_ITEM lvi;

    if (ListView_IsOwnerData(plv))
    {
       RIPMSG(0, "LVM_SETITEMTEXT: Invalid for owner-data listview");
       return FALSE;
    }

    ListView_InvalidateTTLastHit(plv, i);

    lvi.mask = LVIF_TEXT;
    lvi.pszText = (LPTSTR)pszText;
    lvi.iItem = i;
    lvi.iSubItem = iSubItem;

    return ListView_OnSetItem(plv, &lvi);
}

VOID CALLBACK ImgCtxCallback(void * pvImgCtx, void * pvArg)
{
    LV *plv = (LV *)pvArg;
    ULONG ulState;
    SIZE sizeImg;
    IImgCtx *pImgCtx = plv->pImgCtx;

    IImgCtx_GetStateInfo(pImgCtx, &ulState, &sizeImg, TRUE);

    if (ulState & (IMGLOAD_STOPPED | IMGLOAD_ERROR))
    {
        TraceMsg(TF_BKIMAGE, "Listview ImageCallback: Error!");
        plv->fImgCtxComplete = FALSE;
    }

    else if (ulState & IMGCHG_COMPLETE)
    {
        TraceMsg(TF_BKIMAGE, "Listview ImageCallback: Complete!");
        plv->fImgCtxComplete = TRUE;
        InvalidateRect(plv->ci.hwnd, NULL, TRUE);
    }
}

void ListView_ReleaseBkImage(LV *plv)
{
    if (plv->pImgCtx)
    {
        IImgCtx_Release(plv->pImgCtx);
        plv->pImgCtx = NULL;

        if (plv->hpalHalftone)
        {
            // No need to delete the half tone palette since we really
            // share it with the image context and it will clean up.
            plv->hpalHalftone = NULL;
        }
    }

    if (plv->hbmBkImage)
    {
        DeleteObject(plv->hbmBkImage);
        plv->hbmBkImage = NULL;
    }

    if (plv->pszBkImage)
    {
        LocalFree(plv->pszBkImage);
        plv->pszBkImage = NULL;
    }
}

BOOL WINAPI ListView_OnSetBkImage(LV* plv, LPLVBKIMAGE pbi)
{
    BOOL fRet = FALSE;
    if (!pbi)
        return FALSE;
    
    if (pbi->ulFlags & LVBKIF_TYPE_WATERMARK)
    {
        BITMAP bm;
        if (pbi->ulFlags & ~LVBKIF_TYPE_WATERMARK)
            return FALSE;       // We don't support anything else with a watermark

        if (plv->hbmpWatermark)
        {
            DeleteObject(plv->hbmpWatermark);
            plv->hbmpWatermark = NULL;
        }

        if (pbi->hbm && GetObject(pbi->hbm, sizeof(bm), &bm))
        {
            plv->hbmpWatermark = pbi->hbm;
            plv->szWatermark.cx = bm.bmWidth;
            plv->szWatermark.cy = bm.bmHeight;
            fRet = TRUE;
        }
    }
    else
    {
        LPCTSTR pszImage = pbi->pszImage;
        long fl;
        switch (pbi->ulFlags & LVBKIF_SOURCE_MASK)
        {
        case LVBKIF_SOURCE_NONE:
            TraceMsg(TF_BKIMAGE, "LV SetBkImage to none");
            ListView_ReleaseBkImage(plv);
            break;

        case LVBKIF_SOURCE_HBITMAP:
            TraceMsg(TF_BKIMAGE, "LV SetBkImage to hBitmap %08lX", pbi->hbm);
            ListView_ReleaseBkImage(plv);
            if (pbi->hbm &&
                (plv->pImgCtx = CBitmapImgCtx_Create(pbi->hbm)) != NULL)
            {
                plv->hbmBkImage = pbi->hbm;
            }
            else
            {
                pbi->ulFlags &= ~LVBKIF_SOURCE_HBITMAP;
            }
            break;

        case LVBKIF_SOURCE_URL:
            TraceMsg(TF_BKIMAGE, "LV SetBkImage to URL");
            ListView_ReleaseBkImage(plv);
            if (pszImage && pszImage[0])
            {
                HRESULT (*pfnCoCreateInstance)(REFCLSID, IUnknown *, DWORD, REFIID, void * *);
                HRESULT hr;
                HMODULE hmodOLE;
                DWORD   cchBkImage = lstrlen(pszImage)+1;

                plv->pszBkImage = LocalAlloc(LPTR, cchBkImage * sizeof(TCHAR));
                if (plv->pszBkImage == NULL)
                {
                    TraceMsg(TF_BKIMAGE, "Wow, could not allocate memory for string!");
                    return FALSE;
                }
                StringCchCopy(plv->pszBkImage, cchBkImage, pszImage);

                if (((hmodOLE = GetModuleHandle(TEXT("OLE32"))) == NULL) ||
                    ((pfnCoCreateInstance = (HRESULT (*)(REFCLSID, IUnknown *, DWORD, REFIID, void * *))GetProcAddress(hmodOLE, "CoCreateInstance")) == NULL))
                {
                    TraceMsg(TF_BKIMAGE, "Could not find CoCreateInstance!");
                    TraceMsg(TF_BKIMAGE, "Did the caller remember to call CoInitialize?");
                    return FALSE;
                }

                hr = pfnCoCreateInstance(&CLSID_IImgCtx, NULL, CLSCTX_INPROC_SERVER,
                                         &IID_IImgCtx, (void * *)&plv->pImgCtx);

                if (FAILED(hr))
                {
                    TraceMsg(TF_BKIMAGE, "Could not create a pImgCtx!");
                    TraceMsg(TF_BKIMAGE, "Did you remember to register IEIMAGE.DLL?");
                    return FALSE;
                }
                //
                // Mirror the downloaded image if the listview window is RTL mirrored,
                // so that it would be displayed as is. [samera]
                //
                fl = ((IS_WINDOW_RTL_MIRRORED(plv->ci.hwnd)) ? DWN_MIRRORIMAGE : 0);

                hr = IImgCtx_Load(plv->pImgCtx, pszImage, fl);
                if (FAILED(hr))
                {
                    IImgCtx_Release(plv->pImgCtx);
                    plv->pImgCtx = NULL;
                    TraceMsg(TF_BKIMAGE, "Could not init a pImgCtx!");
                    return FALSE;
                }
            }
            else
            {
                pbi->ulFlags &= ~LVBKIF_SOURCE_URL;
            }
            break;

        default:
            RIPMSG(0, "LVM_SETBKIMAGE: Unsupported image type %d", pbi->ulFlags & LVBKIF_SOURCE_MASK);
            return FALSE;
        }

        plv->ulBkImageFlags = pbi->ulFlags;
        plv->xOffsetPercent = pbi->xOffsetPercent;
        plv->yOffsetPercent = pbi->yOffsetPercent;

        //
        // If we actually created a pImgCtx, initialize it here.
        //
        if (plv->pImgCtx)
        {
            if (plv->hpalHalftone == NULL)
            {
                IImgCtx_GetPalette(plv->pImgCtx, &plv->hpalHalftone);
            }

            plv->fImgCtxComplete = FALSE;
            IImgCtx_SetCallback(plv->pImgCtx, ImgCtxCallback, plv);
            IImgCtx_SelectChanges(plv->pImgCtx, IMGCHG_COMPLETE, 0, TRUE);

            TraceMsg(TF_BKIMAGE, "  SUCCESS!");
            fRet = TRUE;
        }
    }

    InvalidateRect(plv->ci.hwnd, NULL, TRUE);

    return fRet;
}

BOOL WINAPI ListView_OnSetBkImageA(LV* plv, LPLVBKIMAGEA pbiA)
{
    BOOL fProducedString = FALSE;
    BOOL fRet;
    LVBKIMAGEW biW;

    CopyMemory(&biW, pbiA, sizeof(LVBKIMAGE));

    switch (biW.ulFlags & LVBKIF_SOURCE_MASK)
    {
    case LVBKIF_SOURCE_NONE:
    case LVBKIF_SOURCE_HBITMAP:
        break;

    case LVBKIF_SOURCE_URL:
        if (biW.pszImage != NULL)
        {
            biW.pszImage = ProduceWFromA(plv->ci.uiCodePage, (LPCSTR)biW.pszImage);
            if (biW.pszImage == (LPARAM)NULL)
            {
                return FALSE;
            }
            fProducedString = TRUE;
        }
        break;

    default:
        // Let ListView_OnSetBkImage() complain about the invalid parameter
        break;
    }

    fRet = ListView_OnSetBkImage(plv, &biW);

    if (fProducedString)
    {
        FreeProducedString((void *)biW.pszImage);
    }

    return fRet;
}

BOOL WINAPI ListView_OnGetBkImage(LV* plv, LPLVBKIMAGE pbi)
{
    BOOL fRet = FALSE;

    if (!IsBadWritePtr(pbi, sizeof(*pbi)))
    {
        if (pbi->ulFlags & LVBKIF_TYPE_WATERMARK)
        {
            pbi->hbm = plv->hbmpWatermark;
            fRet = TRUE;
        }
        else
        {
            pbi->ulFlags = plv->ulBkImageFlags;

            switch (plv->ulBkImageFlags & LVBKIF_SOURCE_MASK)
            {
            case LVBKIF_SOURCE_NONE:
                fRet = TRUE;
                break;

            case LVBKIF_SOURCE_HBITMAP:
                pbi->hbm = plv->hbmBkImage;
                fRet = TRUE;
                break;

            case LVBKIF_SOURCE_URL:
                if (!IsBadWritePtr(pbi->pszImage, pbi->cchImageMax * sizeof(TCHAR)))
                {
                    StringCchCopy(pbi->pszImage, pbi->cchImageMax, plv->pszBkImage);
                    fRet = TRUE;
                }
                break;

            default:
                RIPMSG(0, "ListView_OnGetBkImage: Invalid source");
                break;
            }

            pbi->xOffsetPercent = plv->xOffsetPercent;
            pbi->yOffsetPercent = plv->yOffsetPercent;
        }
    }

    return fRet;
}

BOOL WINAPI ListView_OnGetBkImageA(LV* plv, LPLVBKIMAGEA pbiA)
{
    BOOL fRet = FALSE;

    if (!IsBadWritePtr(pbiA, sizeof(*pbiA)))
    {
        pbiA->ulFlags = plv->ulBkImageFlags;

        switch (plv->ulBkImageFlags & LVBKIF_SOURCE_MASK)
        {
        case LVBKIF_SOURCE_NONE:
            fRet = TRUE;
            break;

        case LVBKIF_SOURCE_HBITMAP:
            pbiA->hbm = plv->hbmBkImage;
            fRet = TRUE;
            break;

        case LVBKIF_SOURCE_URL:
            if (!IsBadWritePtr(pbiA->pszImage, pbiA->cchImageMax))
            {
                ConvertWToAN(plv->ci.uiCodePage, pbiA->pszImage,
                             pbiA->cchImageMax, plv->pszBkImage, -1);
                fRet = TRUE;
            }
            break;

        default:
            RIPMSG(0, "ListView_OnGetBkImage: Invalid source");
            break;
        }

        pbiA->xOffsetPercent = plv->xOffsetPercent;
        pbiA->yOffsetPercent = plv->yOffsetPercent;
    }

    return fRet;
}

void ListView_FreeSubItem(PLISTSUBITEM plsi)
{
    if (plsi)
    {
        Str_Set(&plsi->pszText, NULL);
        LocalFree(plsi);
    }
}

int ListView_GetCxScrollbar(LV* plv)
{
    int cx;

    if (((plv->exStyle & LVS_EX_FLATSB) == 0) ||
        !FlatSB_GetScrollProp(plv->ci.hwnd, WSB_PROP_CXVSCROLL, &cx))
    {
        cx = g_cxScrollbar;
    }

    return cx;
}

int ListView_GetCyScrollbar(LV* plv)
{
    int cy;

    if (((plv->exStyle & LVS_EX_FLATSB) == 0) ||
        !FlatSB_GetScrollProp(plv->ci.hwnd, WSB_PROP_CYHSCROLL, &cy))
    {
        cy = g_cyScrollbar;
    }

    return cy;
}

DWORD ListView_GetWindowStyle(LV* plv)
{
    DWORD dwStyle;

    if (((plv->exStyle & LVS_EX_FLATSB) == 0) ||
        !FlatSB_GetScrollProp(plv->ci.hwnd, WSB_PROP_WINSTYLE, (LPINT)&dwStyle))
    {
        dwStyle = GetWindowStyle(plv->ci.hwnd);
    }

    return dwStyle;
}

int ListView_SetScrollInfo(LV *plv, int fnBar, LPSCROLLINFO lpsi, BOOL fRedraw)
{
    int iRc;

    if (plv->exStyle & LVS_EX_FLATSB)
    {
        iRc = FlatSB_SetScrollInfo(plv->ci.hwnd, fnBar, lpsi, fRedraw);
    }
    else
    {
        iRc = SetScrollInfo(plv->ci.hwnd, fnBar, lpsi, fRedraw);
    }

    //
    //  You'd think we were finished, but in fact the game is only half over.
    //
    //  Some apps (e.g., Font Folder) will do
    //
    //      SetWindowLong(hwnd, GWL_STYLE, newStyle);
    //
    //  where newStyle toggles the WS_HSCROLL and/or WS_VSCROLL bits.
    //  This causes USER's internal bookkeeping to go completely out
    //  of whack:  The ScrollInfo says that there is a scrollbar, but
    //  the window style says there isn't, or vice versa.  The result
    //  is that we get a scrollbar when we shouldn't or vice versa.
    //
    //  So each time we tweak the scroll info in a manner that changes
    //  the range and page, we kick USER in the head to make sure USER's
    //  view of the world (via style bits) is the same as the scroll
    //  bar's view of the world (via SCROLLINFO).
    //

    //
    //  We should always change SIF_PAGE and SIF_RANGE at the same time.
    //
    ASSERT((lpsi->fMask & (SIF_PAGE | SIF_RANGE)) == 0 ||
           (lpsi->fMask & (SIF_PAGE | SIF_RANGE)) == (SIF_PAGE | SIF_RANGE));

    if ((lpsi->fMask & (SIF_PAGE | SIF_RANGE)) == (SIF_PAGE | SIF_RANGE))
    {
        BOOL fShow;
        fShow = lpsi->nMax && (int)lpsi->nPage <= lpsi->nMax;

#ifdef DEBUG
        {
            DWORD dwStyle, dwScroll, dwWant;
            dwScroll = (fnBar == SB_VERT) ? WS_VSCROLL : WS_HSCROLL;
            //
            //  We can short-circuit some logic with secret knowledge about how
            //  ListView uses SetScrollInfo.
            //
            ASSERT(lpsi->nMin == 0);

            dwWant = fShow ? dwScroll : 0;
            dwStyle = ListView_GetWindowStyle(plv);
            if ((dwStyle & dwScroll) != dwWant)
            {
                TraceMsg(TF_LISTVIEW, "ListView_SetScrollInfo: App twiddled WS_[VH]SCROLL");
            }
        }
#endif

        if (plv->exStyle & LVS_EX_FLATSB)
            FlatSB_ShowScrollBar(plv->ci.hwnd, fnBar, fShow);
        else
            ShowScrollBar(plv->ci.hwnd, fnBar, fShow);
    }

    return iRc;
}

// Add/remove/replace item

BOOL ListView_FreeItem(LV* plv, LISTITEM* pitem)
{
    ASSERT(!ListView_IsOwnerData(plv));

    if (pitem)
    {
        if ((pitem->puColumns) && (pitem->cColumns != I_COLUMNSCALLBACK))
            LocalFree(pitem->puColumns);

        Str_Set(&pitem->pszText, NULL);
        if (pitem->hrgnIcon && pitem->hrgnIcon!=(HANDLE)-1)
            DeleteObject(pitem->hrgnIcon);
        // NOTE: We never remove items from the image list; that's
        // the app's responsibility.
        // REVIEW: Should we do this?  Or should we just provide
        // a message that will adjust image indices for the guy
        // when one is removed?
        //
        ControlFree(plv->hheap, pitem);
    }
    return FALSE;
}

LISTITEM* ListView_CreateItem(LV* plv, const LV_ITEM* plvi)
{
    LISTITEM* pitem = ControlAlloc(plv->hheap, sizeof(LISTITEM));

    ASSERT(!ListView_IsOwnerData(plv));

    if (pitem)
    {
        if (plvi->mask & LVIF_STATE)
        {
            if (plvi->state & ~LVIS_ALL)
            {
                DebugMsg(DM_ERROR, TEXT("ListView: Invalid state: %04x"), plvi->state);
                return NULL;
            }

            // If adding a selected item to a single-select listview, deselect
            // any other items.
            if ((plv->ci.style & LVS_SINGLESEL) && (plvi->state & LVIS_SELECTED))
                ListView_DeselectAll(plv, -1);

            pitem->state  = (plvi->state & ~(LVIS_FOCUSED | LVIS_SELECTED));
        }

        if (plvi->mask & LVIF_PARAM)
            pitem->lParam = plvi->lParam;

        if (plvi->mask & LVIF_IMAGE)
            pitem->iImage = (short) plvi->iImage;

        if (plvi->mask & LVIF_INDENT)
            pitem->iIndent = (short) plvi->iIndent;

        pitem->pt.x = pitem->pt.y = RECOMPUTE;
        ListView_SetSRecompute(pitem);

        pitem->pszText = NULL;
        if (plvi->mask & LVIF_TEXT) 
        {
            if (!Str_Set(&pitem->pszText, plvi->pszText))
            {
                ListView_FreeItem(plv, pitem);
                return NULL;
            }
        }

        if ((plvi->mask & LVIF_COLUMNS) && plvi->cColumns)
        {
            pitem->cColumns = plvi->cColumns;
            if (plvi->cColumns != I_COLUMNSCALLBACK)
            {
                // Too many columns, or no column array? Then fail.
                if ((plvi->cColumns > CCMAX_TILE_COLUMNS) || (plvi->puColumns == NULL))
                {
                    ListView_FreeItem(plv, pitem);
                    return NULL;
                }

                pitem->puColumns = LocalAlloc(LPTR, sizeof(UINT) * pitem->cColumns);
                if (pitem->puColumns == NULL)
                {
                    ListView_FreeItem(plv, pitem);
                    return NULL;
                }

                CopyMemory(pitem->puColumns, plvi->puColumns, sizeof(UINT) * pitem->cColumns);
            }
        }
        else
        {
            pitem->cColumns = 0;
            pitem->puColumns = NULL;
        }

        pitem->dwId = plv->idNext++;        // This may overflow. How to deal?
    }

    return pitem;
}

// HACK ALERT!! -- fSmoothScroll is an added parameter!  It allows for smooth
// scrolling when deleting items.  ListView_LRInvalidateBelow is only currently
// called from ListView_OnUpdate and ListView_OnDeleteItem.  Both these calls
// have been modified to work correctly and be backwards compatible.
//
void ListView_LRInvalidateBelow(LV* plv, int i, int fSmoothScroll)
{
    if (ListView_IsListView(plv) || ListView_IsReportView(plv))
    {
        RECT rcItem;

        if (!ListView_RedrawEnabled(plv) ||
            (ListView_IsReportView(plv) && (plv->pImgCtx != NULL)))
            fSmoothScroll = FALSE;

        if (i >= 0)// && i < ListView_Count(plv))
        {
            ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, NULL, &rcItem, NULL);
        }
        else
        {
            rcItem.left = rcItem.top = 0;
            rcItem.right = plv->sizeClient.cx;
            rcItem.bottom = plv->sizeClient.cy;
        }

        // Don't try to scroll over the header part
        if (ListView_IsReportView(plv) && rcItem.top < plv->yTop)
            rcItem.top = plv->yTop;

        // For both List and report view need to erase the item and
        // below.  Note: do simple test to see if there is anything
        // to redraw

        // we can't check for bottom/right > 0 because if we nuked something
        // above or to the left of the view, it may affect us all
        if ((rcItem.top <= plv->sizeClient.cy) &&
            (rcItem.left <= plv->sizeClient.cx))
        {
            rcItem.bottom = plv->sizeClient.cy;

            if (ListView_RedrawEnabled(plv))
            {
                if ((plv->clrBk == CLR_NONE) && (plv->pImgCtx == NULL))
                {
                    LVSeeThruScroll(plv, &rcItem);
                }
                else if (ListView_IsReportView(plv) && fSmoothScroll)
                {
                    SMOOTHSCROLLINFO si =
                    {
                        sizeof(si),
                        SSIF_MINSCROLL,
                        plv->ci.hwnd,
                        0,
                        -(plv->cyItem),
                        &rcItem,
                        &rcItem,
                        NULL,
                        NULL,
                        SW_INVALIDATE|SW_ERASE,
                        SSI_DEFAULT,
                        1,
                        1,
                    };
                    SmoothScrollWindow(&si);
                }
                else
                {
                    RedrawWindow(plv->ci.hwnd, &rcItem, NULL, RDW_INVALIDATE | RDW_ERASE);
                }
            }
            else
            {
                RedrawWindow(plv->ci.hwnd, &rcItem, NULL, RDW_INVALIDATE | RDW_ERASE);
            }

            if (ListView_IsListView(plv))
            {
                RECT rcClient;
                // For Listview we need to erase the other columns...
                rcClient.left = rcItem.right;
                rcClient.top = 0;
                rcClient.bottom = plv->sizeClient.cy;
                rcClient.right = plv->sizeClient.cx;
                RedrawWindow(plv->ci.hwnd, &rcClient, NULL, RDW_INVALIDATE | RDW_ERASE);
            }
        }
    }
}

// Used in Ownerdata Icon views to try to not invalidate the whole world...
void ListView_IInvalidateBelow(LV* plv, int i)
{
    RECT rcItem;

    if (i >= 0)
    {
        ListView_GetRects(plv, i, QUERY_DEFAULT, NULL, NULL, &rcItem, NULL);
    }
    else
    {
        rcItem.left = rcItem.top = 0;
        rcItem.right = plv->sizeClient.cx;
        rcItem.bottom = plv->sizeClient.cy;
    }

    // For Iconviews we need to invalidate everything to the right of us in this
    // row and everything below the row...
    // below.  Note: do simple test to see if there is anything
    // to redraw

    if ((rcItem.top <= plv->sizeClient.cy) &&
        (rcItem.left <= plv->sizeClient.cx))
    {
        rcItem.right = plv->sizeClient.cx;
        RedrawWindow(plv->ci.hwnd, &rcItem, NULL, RDW_INVALIDATE | RDW_ERASE);

        // Now erase everything below...
        rcItem.top = rcItem.bottom;
        rcItem.bottom = plv->sizeClient.cy;
        rcItem.left = 0;
        RedrawWindow(plv->ci.hwnd, &rcItem, NULL, RDW_INVALIDATE | RDW_ERASE);
    }
}


void ListView_OnUpdate(LV* plv, int i)
{
    // If in icon/small view, don't call InvalidateItem, since that'll force
    // FindFreeSlot to get called, which is pig-like.  Instead, just
    // force a WM_PAINT message, which we'll catch and call Recompute with.
    //
    if (ListView_IsAutoArrangeView(plv))
    {
        ListView_ArrangeOrSnapToGrid(plv);
        if (!(plv->ci.style & LVS_AUTOARRANGE))
            RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INTERNALPAINT | RDW_NOCHILDREN);
    }
    else
    {
        // HACK ALERT!! -- The third parameter is new.  It allows for
        // smooth scrolling when items are deleted in reportview.
        // Passing 0, tells it NOT to scroll.
        //
        ListView_LRInvalidateBelow(plv, i, 0);
    }
    ListView_UpdateScrollBars(plv);
}

int ListView_OnInsertItemA(LV* plv, LV_ITEMA* plvi)
{
    LPWSTR pszW = NULL;
    LPSTR pszC = NULL;
    int iRet;

    //HACK ALERT -- this code assumes that LV_ITEMA is exactly the same
    // as LV_ITEMW except for the pointer to the string.
    COMPILETIME_ASSERT(sizeof(LV_ITEMA) == sizeof(LV_ITEMW));

    if (!plvi)
    {
        return -1;
    }

    if ((plvi->mask & LVIF_TEXT) && (plvi->pszText != NULL))
    {
        pszC = plvi->pszText;
        pszW = ProduceWFromA(plv->ci.uiCodePage, pszC);
        if (pszW == NULL)
            return -1;
        plvi->pszText = (LPSTR)pszW;
    }

    iRet = ListView_OnInsertItem(plv, (const LV_ITEM*) plvi);

    if (pszW != NULL)
    {
        plvi->pszText = pszC;
        FreeProducedString(pszW);
    }

    return iRet;

}

int ListView_OnInsertItem(LV* plv, const LV_ITEM* plvi)
{
    int i;
    ListView_InsertItemInternal(plv, plvi, &i);
    return i;
}

LISTITEM* ListView_InsertItemInternal(LV* plv, const LV_ITEM* plvi, int* pi)
{
    int iItem;
    LISTITEM *pitem = NULL;

    *pi = -1;
    if (plvi == NULL)
    {
        RIPMSG(0, "ListView_InsertItem: Do not pass a NULL LV_ITEM.");
        return NULL;
    }

    if (plvi->iSubItem != 0)    // can only insert the 0th item
    {
        RIPMSG(0, "ListView_InsertItem: iSubItem must be 0 (app passed %d)", plvi->iSubItem);
        return NULL;
    }

    // If sorted, then insert sorted.
    //
    if (plv->ci.style & (LVS_SORTASCENDING | LVS_SORTDESCENDING)
        && !ListView_IsOwnerData(plv))
    {
        if (plvi->pszText == LPSTR_TEXTCALLBACK)
        {
            DebugMsg(DM_ERROR, TEXT("Don't use LPSTR_TEXTCALLBACK with LVS_SORTASCENDING or LVS_SORTDESCENDING"));
            return NULL;
        }
        iItem = ListView_LookupString(plv, plvi->pszText, LVFI_SUBSTRING | LVFI_NEARESTXY, 0);
    }
    else
        iItem = plvi->iItem;

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    if (!ListView_IsOwnerData(plv))
    {
        int iZ;
        static s_blah = 0;
        UINT uSelMask = plvi->mask & LVIF_STATE ?
                (plvi->state & (LVIS_FOCUSED | LVIS_SELECTED))
                : 0;
        UINT uSel = uSelMask;
        pitem = ListView_CreateItem(plv, plvi);

        if (!pitem)
            return NULL;

        iItem = DPA_InsertPtr(plv->hdpa, iItem, pitem);
        if (iItem == -1)
        {
            ListView_FreeItem(plv, pitem);
            return NULL;
        }

        plv->cTotalItems++;

        if (plv->hdpaSubItems)
        {
            int iCol;
            // slide all the colum DPAs down to match the location of the
            // inserted item
            //
            for (iCol = plv->cCol - 1; iCol >= 0; iCol--)
            {
                HDPA hdpa = ListView_GetSubItemDPA(plv, iCol);
                if (hdpa)       // this is optional, call backs don't have them
                {
                    // insert a blank item (REVIEW: should this be callback?)

                    // since this can be a tail sparce array,
                    // we need to make sure enough items are there.
                    if (iItem >= DPA_GetPtrCount(hdpa))
                        DPA_SetPtr(hdpa, iItem, NULL);
                    else if (DPA_InsertPtr(hdpa, iItem, NULL) != iItem)
                        goto Failure;
                    // Bad assert since hdpa can be tail sparse
                    // ASSERT(ListView_Count(plv) == DPA_GetPtrCount(hdpa));
                    ASSERT(ListView_Count(plv) >= DPA_GetPtrCount(hdpa));
                }
            }
        }

        // Add item to end of z order
        //
        iZ = DPA_InsertPtr(plv->hdpaZOrder, ListView_Count(plv), IntToPtr(iItem));

        if (iZ == -1)
        {
Failure:
            DebugMsg(TF_LISTVIEW, TEXT("ListView_OnInsertItem() failed"));
            if (DPA_DeletePtr(plv->hdpa, iItem))
                plv->cTotalItems--;
            ListView_FreeItem(plv, pitem);
            return NULL;
        }

        // if we inserted before the focus point, move the focus point up one
        if (iItem <= plv->iFocus)
            plv->iFocus++;
        // do the same thing for the mark
        if (iItem <= plv->iMark)
            plv->iMark++;

        // If the item was not added at the end of the list we need
        // to update the other indexes in the list
        if (iItem != ListView_Count(plv) - 1)
        {
            int i2;
            for (i2 = iZ - 1; i2 >= 0; i2--)
            {
                int iItemZ = (int)(UINT_PTR)DPA_FastGetPtr(plv->hdpaZOrder, i2);
                if (iItemZ >= iItem)
                    DPA_SetPtr(plv->hdpaZOrder, i2, (void *)(UINT_PTR)(iItemZ + 1));
            }
        }

        if (ListView_CheckBoxes(plv)) 
        {
            uSelMask |= LVIS_STATEIMAGEMASK;
            uSel |= INDEXTOSTATEIMAGEMASK(1);
        }

        if (uSelMask) 
        {
            // we masked off these in the createitem above.
            // because turning these on means more than setting the bits.
            ListView_OnSetItemState(plv, iItem, uSel, uSelMask);
        }

        if (plvi->mask & LVIF_GROUPID)
        {
            int iGroupId = plvi->iGroupId;
            if (iGroupId == I_GROUPIDNONE)
            {
                LISTITEM_SETASKEDFORGROUP(pitem);
            }
            else if (iGroupId != I_GROUPIDCALLBACK)
            {
                LISTGROUP* pgrp = ListView_FindGroupFromID(plv, iGroupId, NULL);
                if (!pgrp)
                {
                    ListView_FreeItem(plv, pitem);
                    return NULL;
                }

                pitem->pGroup = pgrp;
                DPA_AppendPtr(pgrp->hdpa, pitem);
            }
        }
        else
        {
            LISTITEM_SETHASNOTASKEDFORGROUP(pitem);
        }


        if (plv->fGroupView && (plv->flags & LVF_REDRAW))
        {
            _ListView_RecomputeEx(plv, NULL, 0, FALSE);
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        }
    }
    else
    {
        //
        // simply adjust selection and count
        //
        if ((iItem >= 0) && (iItem <= MAX_LISTVIEWITEMS))
        {
            if (FAILED(plv->plvrangeSel->lpVtbl->InsertItem(plv->plvrangeSel, iItem)))
            {
                return  NULL;
            }
            plv->cTotalItems++;
            plv->rcView.left = RECOMPUTE;
            ListView_Recompute(plv);
            if (!ListView_IsReportView(plv) && !ListView_IsListView(plv))
            {
                // We need to erase the background so that we don't leave
                // turds from wrapped labels in large icon mode.  This could
                // be optimized by only invalidating to the right of and
                // below the inserted item.
                InvalidateRect(plv->ci.hwnd, NULL, TRUE);
            }

            // if we inserted before the focus point, move the focus point up
            if (iItem <= plv->iFocus)
                plv->iFocus++;
            // do the same thing for the mark
            if (iItem <= plv->iMark)
                plv->iMark++;
        }
    }

    if (!ListView_IsOwnerData(plv))
    {
        ASSERT(ListView_Count(plv) == DPA_GetPtrCount(plv->hdpaZOrder));
    }

    if (ListView_RedrawEnabled(plv))
    {
        // Update region
        ListView_RecalcRegion(plv, TRUE, TRUE);

        // The Maybe resize colmns may resize things in which case the next call
        // to Update is not needed.
        if (!ListView_MaybeResizeListColumns(plv, iItem, iItem))
            ListView_OnUpdate(plv, iItem);

        // this trick makes inserting lots of items cheap
        // even if redraw is enabled.... don't calc or position items
        // until this postmessage comes around
        if (!plv->uUnplaced)
        {
            PostMessage(plv->ci.hwnd, LVMI_PLACEITEMS, 0, 0);
        }
        plv->uUnplaced++;
    }
    else
    {
        //
        // Special case code to make using SetRedraw work reasonably well
        // for adding items to a listview which is in a non layout mode...
        //
        if ((plv->iFirstChangedNoRedraw == -1) ||
                (iItem < plv->iFirstChangedNoRedraw))
            plv->iFirstChangedNoRedraw = iItem;

    }

    // Nuke insertmark... it may be invalid now that an item has been added.
    {
        LVINSERTMARK lvim = {0};
        lvim.cbSize = sizeof(LVINSERTMARK);
        lvim.iItem = -1;
        ListView_OnSetInsertMark(plv, (LPLVINSERTMARK)&lvim);
    }

    ListView_Notify(plv, iItem, 0, LVN_INSERTITEM);

    NotifyWinEvent(EVENT_OBJECT_CREATE, plv->ci.hwnd, OBJID_CLIENT, iItem+1);

    *pi = iItem;

    return pitem;
}

BOOL ListView_OnDeleteItem(LV* plv, int iItem)
{
    int iCount = ListView_Count(plv);

    if (!ListView_IsValidItemNumber(plv, iItem))
        return FALSE;   // out of range

    NotifyWinEvent(EVENT_OBJECT_DESTROY, plv->ci.hwnd, OBJID_CLIENT, iItem+1);

    ListView_DismissEdit(plv, TRUE);  // cancel edits

    ListView_OnSetItemState(plv, iItem, 0, LVIS_SELECTED);

    if (plv->iFocus == iItem)
        ListView_OnSetItemState(plv, (iItem == iCount - 1 ? iItem - 1 : iItem + 1), LVIS_FOCUSED, LVIS_FOCUSED);

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    if (!ListView_IsOwnerData(plv))
    {
        LISTITEM* pitem = ListView_FastGetItemPtr(plv, iItem);
        int iZ;

        if ((plv->rcView.left != RECOMPUTE) && ListView_IsSlotView(plv)) 
        {
            if (LV_IsItemOnViewEdge(plv, pitem)) 
            {
                plv->rcView.left = RECOMPUTE;
            }
        }

        ListView_RemoveItemFromItsGroup(plv, pitem);
    
        // We don't need to invalidate the item in report view because we
        // will be scrolling on top of it.
        //
        if (!ListView_IsReportView(plv))
            ListView_InvalidateItem(plv, iItem, FALSE, RDW_INVALIDATE | RDW_ERASE);

        // this notify must be done AFTER the Invalidate because some items need callbacks
        // to calculate the rect, but the notify might free it out
        ListView_Notify(plv, iItem, 0, LVN_DELETEITEM);

        // During the notify, the app might've done something to the listview
        // so revalidate the item number pointer so we don't fault
#ifdef DEBUG
        // Validate internally because DPA_DeletePtr will ASSERT if you ask it
        // to delete something that doesn't exist.
        if (!ListView_IsValidItemNumber(plv, iItem))
            pitem = NULL;
        else
#endif
            pitem = DPA_DeletePtr(plv->hdpa, iItem);

        if (!pitem)
        {
            RIPMSG(0, "Something strange happened during LVN_DELETEITEM; abandoning LVM_DELETEITEM");
            return FALSE;
        }

        plv->cTotalItems = DPA_GetPtrCount(plv->hdpa);

        // remove from the z-order, this is a lisearch to find this!

        DPA_DeletePtr(plv->hdpaZOrder, ListView_ZOrderIndex(plv, iItem));

        //
        // As the Z-order hdpa is a set of indexes we also need to decrement
        // all indexes that exceed the one we are deleting.
        //
        for (iZ = ListView_Count(plv) - 1; iZ >= 0; iZ--)
        {
            int iItemZ = (int)(UINT_PTR)DPA_FastGetPtr(plv->hdpaZOrder, iZ);
            if (iItemZ > iItem)
                DPA_SetPtr(plv->hdpaZOrder, iZ, IntToPtr(iItemZ - 1));
        }

        // remove from sub item DPAs if necessary

        if (plv->hdpaSubItems)
        {
            int iCol;
            for (iCol = plv->cCol - 1; iCol >= 0; iCol--)
            {
                HDPA hdpa = ListView_GetSubItemDPA(plv, iCol);
                if (hdpa) 
                {     // this is optional, call backs don't have them
                    PLISTSUBITEM plsi;

                    // These DPAs are tail sparse, so don't get upset if we
                    // try to delete something that's past the end of the list
#ifdef DEBUG
                    plsi = iItem < DPA_GetPtrCount(hdpa) ? DPA_DeletePtr(hdpa, iItem) : NULL;
#else
                    plsi = DPA_DeletePtr(hdpa, iItem);
#endif
                    ListView_FreeSubItem(plsi);
                }
            }
        }

        ListView_FreeItem(plv, pitem);  // ... finaly the item pointer

        if (plv->fGroupView && (plv->flags & LVF_REDRAW))
        {
            _ListView_RecomputeEx(plv, NULL, 0, TRUE);
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        }
    }
    else
    {
        //
        // simply notify and then fixup selection state and count
        //
        if ((iItem >= 0) && (iItem <= MAX_LISTVIEWITEMS))
        {
            ListView_Notify(plv, iItem, 0, LVN_DELETEITEM);

            if (FAILED(plv->plvrangeSel->lpVtbl->RemoveItem(plv->plvrangeSel, iItem)))
            {
                SetLastError(ERROR_OUTOFMEMORY);
                return FALSE;
            }
            plv->cTotalItems--;
            plv->rcView.left = RECOMPUTE;
            ListView_Recompute(plv);

            if (!ListView_IsReportView(plv) && !ListView_IsListView(plv))
            {
                // We need to erase the background so that the last item gets
                // erased in both icon modes and so that we don't leave turds
                // from wrapped labels in large icon mode.  This could be
                // optimized by only invalidating to the right of and below
                // the deleted item.
                InvalidateRect(plv->ci.hwnd, NULL, TRUE);
            }
        }
        else
        {
            return FALSE;
        }
    }

    iCount = ListView_Count(plv);       // regrab count incase someone updated item...

    if (!ListView_IsOwnerData(plv))
    {
        ASSERT(ListView_Count(plv) == DPA_GetPtrCount(plv->hdpaZOrder));
    }

    if (plv->iFocus == iItem) 
    {
        if (plv->iFocus >= iCount) 
        {
            plv->iFocus = iCount - 1;
        }
    } 
    
    if (plv->iFocus > iItem) 
    {
        plv->iFocus--;          // slide the focus index down
    }

    // same with the mark
    if (plv->iMark == iItem)  
    { 
        // deleted the mark item

        if (plv->iMark >= iCount) // did we nuke the last item?
            plv->iMark = iCount - 1;
    } 
    else if (plv->iMark > iItem)
        plv->iMark--;          // slide the mark index down

    // Free up the hot item
    if (plv->iHot == iItem)
        plv->iHot = -1;

    // Deleting an icon invalidates the icon positioning cache
    plv->iFreeSlot = -1;

    // HACK ALERT!! -- This construct with ReportView steals code from
    // ListView_OnUpdate.  Currently, it will work exactly the same as before,
    // EXCEPT, that it won't call ListView_OnUpdate.  This is to allow us to
    // send a flag to ListView_LRUpdateBelow to tell it we're scrolling up.
    //
    if (ListView_IsReportView(plv)) 
    {

        // if the new count is zero and we will be showing empty text, simply invalidate the
        // rect and redraw, else go through the invalidate below code...
        
        // we don't know if we are going to show empty text if pszEmptyText is NULL, or not
        // because we may get one through notify, so if iCount is 0 invalidate everything
        if (iCount == 0)
            InvalidateRect(plv->ci.hwnd, NULL, TRUE);
        else
            ListView_LRInvalidateBelow(plv,iItem,1);



        if (ListView_RedrawEnabled(plv))
            ListView_UpdateScrollBars(plv);
        else {
            //
            // Special case code to make using SetRedraw work reasonably well
            // for adding items to a listview which is in a non layout mode...
            //
            if ((plv->iFirstChangedNoRedraw != -1) && (iItem < plv->iFirstChangedNoRedraw))
                plv->iFirstChangedNoRedraw--;
        }
    }
    else 
    {
        if (ListView_RedrawEnabled(plv))
            ListView_OnUpdate(plv, iItem);

        else
        {
            ListView_LRInvalidateBelow(plv, iItem, 0);
            //
            // Special case code to make using SetRedraw work reasonably well
            // for adding items to a listview which is in a non layout mode...
            //
            if ((plv->iFirstChangedNoRedraw != -1) && (iItem < plv->iFirstChangedNoRedraw))
                plv->iFirstChangedNoRedraw--;
        }
    }
    ListView_RecalcRegion(plv, TRUE, TRUE);

    return TRUE;
}

void ListView_DeleteAllGroupItems(LV* plv)
{
    if (plv->hdpaGroups)
    {
        int iGroup, cGroups = DPA_GetPtrCount(plv->hdpaGroups);
        for (iGroup = 0; iGroup < cGroups; iGroup++)
        {
            LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, iGroup);
            DPA_Destroy(pgrp->hdpa);
            pgrp->hdpa = DPA_Create(5);
        }
    }
}

BOOL ListView_OnDeleteAllItems(LV* plv)
{
    int i;
    BOOL bAlreadyNotified;
    BOOL fHasItemData = !ListView_IsOwnerData(plv);
    
    ListView_DismissEdit(plv, TRUE);    // cancel edits
    ListView_DeleteAllGroupItems(plv);
    
    // Must neutralize the focus because some apps will call
    // ListView_OnGetNextItem(LVNI_FOCUSED) during delete notifications,
    // so we need to make sure the focus is in a safe place.
    // May as well neutralize the mark, too.
    plv->iMark = plv->iFocus = -1;
    
    // Also nuke the icon positioning cache
    plv->iFreeSlot = -1;

    // Since we delete all items, There is no insertion slot!
    plv->iInsertItem = -1;
    
    bAlreadyNotified = (BOOL)ListView_Notify(plv, -1, 0, LVN_DELETEALLITEMS);
    
    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);
    
    if (fHasItemData || !bAlreadyNotified)
    {
        for (i = ListView_Count(plv) - 1; i >= 0; i--)
        {
            if (!bAlreadyNotified)
                ListView_Notify(plv, i, 0, LVN_DELETEITEM);
            
            if (fHasItemData)
            {
                ListView_FreeItem(plv, ListView_FastGetItemPtr(plv, i));
                //
                //  CAREFUL!  Applications such as NT Backup call back
                //  into ListView during the LVN_DELETEITEM notification,
                //  so we need to kill this item or we will fault at the
                //  next iteration because everybody relies on
                //  ListView_Count for validation.
                //
                DPA_FastDeleteLastPtr(plv->hdpa);
                plv->cTotalItems--;
            }
        }
    }
    
    if (ListView_IsOwnerData(plv))
    {
        if (FAILED(plv->plvrangeSel->lpVtbl->Clear(plv->plvrangeSel)))
        {
            SetLastError(ERROR_OUTOFMEMORY);
        }
        plv->cTotalItems = 0;
    }
    else
    {
        DPA_DeleteAllPtrs(plv->hdpa);
        DPA_DeleteAllPtrs(plv->hdpaZOrder);
        plv->cTotalItems = 0;
        
        if (plv->hdpaSubItems)
        {
            int iCol;
            for (iCol = plv->cCol - 1; iCol >= 0; iCol--)
            {
                HDPA hdpa = ListView_GetSubItemDPA(plv, iCol);
                if (hdpa)
                {
                    DPA_EnumCallback(hdpa, ListView_FreeColumnData, 0);
                    DPA_DeleteAllPtrs(hdpa);
                }
            }
        }
    }
    
    plv->rcView.left = RECOMPUTE;
    plv->xOrigin = 0;
    plv->nSelected = 0;
    
    plv->ptlRptOrigin.x = 0;
    plv->ptlRptOrigin.y = 0;
    
    // reset the cxItem width
    if (!(plv->flags & LVF_COLSIZESET))
    {
        plv->cxItem = ListView_ComputeCXItemSize(plv);
    }
    
    RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
    ListView_UpdateScrollBars(plv);
    
    return TRUE;
}

int ListView_IFindNearestItem(LV* plv, int left, int top, UINT vk)
{
    int iMin = -1;
    
    if (ListView_IsOwnerData(plv))
    {
        POINT pt;
        int cSlots;
        int   iWidth = 0, iHeight = 0;
        
        ASSERT(!ListView_IsReportView(plv) && !ListView_IsListView(plv));
        
        pt.x = left + plv->ptOrigin.x;
        pt.y = top + plv->ptOrigin.y;
        
        cSlots = ListView_GetSlotCount(plv, TRUE, &iWidth, &iHeight);
        iMin = ListView_CalcHitSlot(plv, pt, cSlots, iWidth, iHeight);
        
        switch(vk)
        {
        case VK_HOME:
            iMin = 0;
            break;
            
        case VK_END:
            iMin = ListView_Count(plv) - 1;
            break;
            
        case VK_LEFT:
            if (iMin % cSlots)
                iMin -= 1;
            break;
            
        case VK_RIGHT:
            if ((iMin + 1) % cSlots)
                iMin += 1;
            break;
            
        case VK_UP:
            if (iMin >= cSlots)
                iMin -= cSlots;
            break;
            
        case VK_DOWN:
            if (iMin + cSlots < ListView_Count(plv))
                iMin += cSlots;
            break;
            
        default: ;
        }
        
        iMin = max(0, iMin);
        iMin = min(ListView_Count(plv) - 1, iMin);
        
    }
    else
    {
        ULONGLONG dMin = 0;
        int cyItem;
        int yEnd = 0, yLimit = 0, xEnd = 0;
        int iCount;
        int i;
        
        if (ListView_UseLargeIcons(plv)) 
        {
            cyItem = plv->cyIcon;
        } 
        else 
        {
            cyItem = plv->cyItem;
        }
        
        iCount = ListView_Count(plv);
        if (iCount == 1)
            return 0;
        
        if (vk == VK_HOME)
        {
            yEnd = yLimit = plv->rcView.bottom;
            xEnd = plv->rcView.right;
        }
        else if (vk == VK_END)
        {
            yEnd = yLimit = plv->rcView.top;
            xEnd = plv->rcView.left;
        }
        for (i = 0; i < iCount; i++)
        {
            RECT rc;
            int dx;
            ULONGLONG dxAbs, dyAbs, dOffset;
            int dy;
            
            ListView_GetRects(plv, i, QUERY_DEFAULT, &rc, NULL, NULL, NULL);
            
            dx = rc.left - left;
            dxAbs = (ULONGLONG)(dx < 0 ? -dx : dx);
            dy = rc.top - top;
            dyAbs = (ULONGLONG)(dy < 0 ? -dy : dy);
            
            if ((vk == VK_LEFT) && (dxAbs < dyAbs || dx >= 0))
                continue;
            else if ((vk == VK_RIGHT) && (dxAbs < dyAbs || dx <= 0))
                continue;
            else if ((vk == VK_UP) && (dxAbs > dyAbs || dy >= 0))
                continue;
            else if ((vk == VK_DOWN) && (dxAbs > dyAbs || dy <= 0))
                continue;
            
            if (vk == VK_HOME || vk == VK_END)
            {
                // home is not the nearest to the top corner, it's the leftmost of the top row.
                // ditto (reversed) for end.  thus we can't use the stuff below. bummer
                if (vk == VK_HOME)
                {
                    if ((rc.top + cyItem < yEnd) ||  // if it's fully above the highest line so, take it!
                        ((rc.top < yLimit) &&  // if it's on the same row as the top item to date
                        (rc.left < xEnd)))
                    {
                        iMin = i;
                        xEnd = rc.left;
                        yEnd = rc.top;
                        if (rc.top + cyItem < yLimit)
                            yLimit = rc.top + cyItem;
                    }
                }
                else
                {
                    if ((rc.top > yEnd) || //if it's full below the lowest row
                        ((rc.top + cyItem > yLimit) && // if it's on the same row
                        (rc.right > xEnd)))
                    {
                        iMin = i;
                        xEnd = rc.right;
                        yEnd = rc.top;
                        if (rc.top > yLimit)
                            yLimit = rc.top;
                    }
                }
            }
            else
            {
                dOffset = ((dxAbs * dxAbs) + (dyAbs * dyAbs));
                if (iMin == -1 || (dMin > dOffset))
                {
                    dMin = dOffset;
                    iMin = i;
                }
            }
        }
    }
    return iMin;
}

int ListView_Arrow(LV* plv, int iStart, UINT vk)
{
    RECT rcFocus;
    int i;
    int dx;
    int iCount;

    //
    // The algorithm to find which item depends if we are in a view
    // that is arrange(layout) oriented or a sorted (list) view.
    // For the sorted views we will use some optimizations to make
    // it faster
    //
    iCount = ListView_Count(plv);
    if ((ListView_IsReportView(plv) || ListView_IsListView(plv)) && !plv->fGroupView)
    {
        //
        // For up and down arrows, simply increment or decrement the
        // index.  Note: in listview this will cause it to wrap columns
        // which is fine as it is compatible with the file manager
        //
        // Assumes only one of these flags is set...

        switch (vk)
        {
        case VK_LEFT:
            if (ListView_IsReportView(plv))
            {
                ListView_ROnScroll(plv, (GetAsyncKeyState(VK_CONTROL) < 0) ? SB_PAGELEFT : SB_LINELEFT, 0, SB_HORZ);
            }
            else
                iStart -= plv->cItemCol;
            break;

        case VK_RIGHT:
            if (ListView_IsReportView(plv))
            {
                // Make this horizontally scroll the report view
                ListView_ROnScroll(plv, (GetAsyncKeyState(VK_CONTROL) < 0) ? SB_PAGERIGHT : SB_LINERIGHT, 0, SB_HORZ);
            }
            else
                iStart += plv->cItemCol;
            break;

        case VK_UP:
            iStart--;
            break;

        case VK_DOWN:
            iStart++;
            break;

        case VK_HOME:
            iStart = 0;
            break;

        case VK_END:
            iStart = iCount -1;
            break;

        case VK_NEXT:
            if (ListView_IsReportView(plv))
            {
                i = iStart; // save away to make sure we dont go wrong way!

                // First go to end of page...
                iStart = (int)(((LONG)(plv->sizeClient.cy - (plv->cyItem)
                        - plv->yTop) + plv->ptlRptOrigin.y) / plv->cyItem);

                // If Same item, increment by page size.
                if (iStart <= i)
                    iStart = i + max(
                            (plv->sizeClient.cy - plv->yTop)/ plv->cyItem - 1,
                            1);

                if (iStart >= iCount)
                    iStart = iCount - 1;
            }
            else
            {
                // multiply by 2/3 to give a good feel.. when the item is mostly shown
                // you want to go to the next column
                dx = (plv->sizeClient.cx + (plv->cxItem*2)/3) / plv->cxItem;
                if (!dx)
                    dx = 1;

                iStart += plv->cItemCol *  dx;
                if (plv->cItemCol)
                {
                    while (iStart >= iCount)
                        iStart -= plv->cItemCol;
                }
            }
            break;

        case VK_PRIOR:

            if (ListView_IsReportView(plv))
            {
                i = iStart; // save away to make sure we dont go wrong way!

                // First go to end of page...
                iStart = (int)(plv->ptlRptOrigin.y / plv->cyItem);

                // If Same item, increment by page size.
                if (iStart >= i)
                    iStart = i - max(
                            (plv->sizeClient.cy - plv->yTop)/ plv->cyItem - 1,
                            1);

                if (iStart < 0)
                    iStart = 0;
            }
            else
            {
                dx = (plv->sizeClient.cx + (plv->cxItem*2)/3) / plv->cxItem;
                if (!dx)
                    dx = 1;
                iStart -= plv->cItemCol * dx;
                if (plv->cItemCol)
                {
                    while (iStart < 0)
                        iStart += plv->cItemCol;
                }

            }
            break;

        default:
            return -1;      // Out of range
        }

        // Make sure it is in range!.
        if ((iStart >= 0) && (iStart < iCount))
            return iStart;
        else if (iCount == 1)
            return 0;
        else
            return -1;
    }

    else
    {
        //
        // Layout type view. we need to use the position of the items
        // to figure out the next item
        //

        if (ListView_IsOwnerData(plv))
        {
          iStart = max(0, iStart);

            // if it does not matches any of the entries in the case statement below
            // this is done to skip the call back by the GetRects
            //
            if (vk != VK_LEFT  &&
                    vk != VK_RIGHT &&
                    vk != VK_UP &&
                    vk != VK_DOWN &&
                    vk != VK_HOME &&
                    vk != VK_END &&
                    vk != VK_NEXT &&
                    vk != VK_PRIOR)
            {
                return -1;
            }
            ListView_GetRects(plv, iStart, QUERY_DEFAULT, &rcFocus, NULL, NULL, NULL);
        }
        else
        {
            if (iStart != -1)
            {
                ListView_GetRects(plv, iStart, QUERY_DEFAULT, &rcFocus, NULL, NULL, NULL);
            }
        }

        switch (vk)
        {
        // For standard arrow keys just fall out of here.
        case VK_LEFT:
        case VK_RIGHT:
        case VK_UP:
        case VK_DOWN:
            if (ListView_IsOwnerData(plv))
            {
                break;
            }
            else
            {
                if (iStart != -1)
                {
                    // all keys map to VK_HOME except VK_END
                    break;
                }

                // Fall through
                vk = VK_HOME;
            }

        case VK_HOME:
            rcFocus.left = - plv->ptOrigin.x;
            rcFocus.top = - plv->ptOrigin.y;
            break;

        case VK_END:
            rcFocus.left = plv->rcView.right;
            rcFocus.top = plv->rcView.bottom;
            break;

        case VK_NEXT:
            rcFocus.top += plv->sizeClient.cy;
            vk = VK_UP;
            break;

        case VK_PRIOR:
            vk = VK_DOWN;
            rcFocus.top -= plv->sizeClient.cy;
            break;
        default:
            return -1;      // Out of range
        }

        return ListView_IFindNearestItem(plv, rcFocus.left, rcFocus.top, vk);
    }
}

int ListView_OnGetNextItem(LV* plv, int i, UINT flags)
{
    int iStart = i;
    int cItemMax = ListView_Count(plv);

    // Note that -1 is a valid starting point
    if (i < -1 || i >= cItemMax)
        return -1;

    if (ListView_IsOwnerData(plv))
    {
        if (flags & (LVNI_CUT | LVNI_DROPHILITED | LVNI_PREVIOUS))
        {
            return -1;
        }
    }

    if (flags & LVNI_FOCUSED)
    {
        // we know which item is focused, jump right to it.
        // but we have to mimick the code below exactly for compat:
        //     if directional bits are set, they take precedence.
        if (!(flags & (LVNI_ABOVE | LVNI_BELOW | LVNI_TORIGHT | LVNI_TOLEFT)))
        {
            // there are no more focused items after iFocus
            if (i >= plv->iFocus)
                return -1;

            // subtract one here -- we increment it below
            i = plv->iFocus - 1;
        }
    }

    while (TRUE)
    {
        if (flags & (LVNI_ABOVE | LVNI_BELOW | LVNI_TORIGHT | LVNI_TOLEFT))
        {
            UINT vk;
            if (flags & LVNI_ABOVE)
                vk = VK_UP;
            else if (flags & LVNI_BELOW)
                vk = VK_DOWN;
            else if (flags & LVNI_TORIGHT)
                vk = VK_RIGHT;
            else
                vk = VK_LEFT;

            if (i != -1)
                i = ListView_Arrow(plv, i, vk);
            if (i == -1)
                return i;

        }
        else
        {
            i++;
            if (i == cItemMax)
                return -1;
        }

        // See if any other restrictions are set
        if (flags & ~(LVNI_ABOVE | LVNI_BELOW | LVNI_TORIGHT | LVNI_TOLEFT))
        {
            WORD wItemState;

            if (ListView_IsOwnerData(plv))
            {
                if (flags & LVNI_FOCUSED)
                {
                    // we check LVNI_FOCUSED before the loop, so i == iFocus
                    ASSERT(i == plv->iFocus && i != -1);
                    if (flags & LVNI_SELECTED)
                    {
                        if (plv->plvrangeSel->lpVtbl->IsSelected(plv->plvrangeSel, i) != S_OK)
                        {
                            i = -1;
                        }
                    }
                }
                else if (flags & LVNI_SELECTED)
                {
                    i = max(i, 0);
                    plv->plvrangeSel->lpVtbl->NextSelected(plv->plvrangeSel, i, &i);
                }
                else
                {
                    i = -1;
                }
            }
            else
            {
                {
                    LISTITEM* pitem = ListView_FastGetItemPtr(plv, i);
                    wItemState = pitem->state;
                }

                // for LVNI_FOCUSED, we start at the LVIS_FOCUSED element, if we're
                // not on that element, one of the below continues was hit, so
                // we'll never find the element. bail out early.
                if ((flags & LVNI_FOCUSED) && !(wItemState & LVIS_FOCUSED))
                {
                    ASSERT(i == plv->iFocus || i == plv->iFocus+1);
                    return -1;
                }

                if (((flags & LVNI_SELECTED) && !(wItemState & LVIS_SELECTED)) ||
                    ((flags & LVNI_CUT) && !(wItemState & LVIS_CUT)) ||
                    ((flags & LVNI_DROPHILITED) && !(wItemState & LVIS_DROPHILITED)))
                {
                    if (i != iStart)
                        continue;
                    else 
                    {
                        // we've looped and we can't find anything to fit this criteria
                        return -1;
                    }
                }
            }
        }
        return i;
    }
}

int ListView_CompareString(LV* plv, int i, LPCTSTR pszFind, UINT flags, int iLen)
{
    // REARCHITECT: non protected globals
    int cb;
    TCHAR ach[CCHLABELMAX];
    LV_ITEM item;

    ASSERT(!ListView_IsOwnerData(plv));
    ASSERT(pszFind);

    item.iItem = i;
    item.iSubItem = 0;
    item.mask = LVIF_TEXT;
    item.pszText = ach;
    item.cchTextMax = ARRAYSIZE(ach);
    ListView_OnGetItem(plv, &item);

    if (!(flags & (LVFI_PARTIAL | LVFI_SUBSTRING)))
        return lstrcmpi(item.pszText, pszFind);

    // FEATURE: LVFI_SUBSTRING is not really implemented yet.

    cb = lstrlen(pszFind);
    if (iLen && (cb > iLen))
    {
        cb = iLen;
    }

    //
    // If the sub strings not equal then return the ordering based
    // on the entire string.
    //
    return IntlStrEqNI(item.pszText, pszFind, cb) ? 0 : lstrcmp(item.pszText, pszFind);
}

int ListView_OnFindItemA(LV* plv, int iStart, LV_FINDINFOA * plvfi)
{
    LPWSTR pszW = NULL;
    LPCSTR pszC = NULL;
    int iRet;

    //HACK ALERT -- this code assumes that LV_FINDINFOA is exactly the same
    // as LV_FINDINFOW except for the pointer to the string.
    COMPILETIME_ASSERT(sizeof(LV_FINDINFOA) == sizeof(LV_FINDINFOW));

    if (!plvfi)
        return -1;

    if (!(plvfi->flags & LVFI_PARAM) && !(plvfi->flags & LVFI_NEARESTXY))
    {
        pszC = plvfi->psz;
        if ((pszW = ProduceWFromA(plv->ci.uiCodePage, pszC)) == NULL)
            return -1;
        plvfi->psz = (LPSTR)pszW;
    }

    iRet = ListView_OnFindItem(plv, iStart, (const LV_FINDINFO *)plvfi);

    if (pszW != NULL)
    {
        plvfi->psz = pszC;

        FreeProducedString(pszW);
    }

    return iRet;
}

int ListView_OnFindItem(LV* plv, int iStart, const LV_FINDINFO* plvfi)
{
    int i;
    int j;
    int cItem;
    UINT flags;

    if (!plvfi)
        return -1;

    if (plvfi->flags & LVFI_NEARESTXY) 
    {
        if (ListView_IsSlotView(plv)) 
        {
            return ListView_IFindNearestItem(plv, plvfi->pt.x, plvfi->pt.y, plvfi->vkDirection);
        } 
        else
            return -1;
    }

    // Note that -1 is a valid starting point
    if (iStart < -1 || iStart >= ListView_Count(plv))
        return -1;

    if (ListView_IsOwnerData(plv))
    {
        // call back to owner for search
        return (int) ListView_RequestFindItem(plv, plvfi, iStart + 1);
    }
    else
    {
        flags  = plvfi->flags;
        i = iStart;
        cItem = ListView_Count(plv);
        if (flags & LVFI_PARAM)
        {
            LPARAM lParam = plvfi->lParam;

            // Lisearch with wraparound...
            //
            for (j = cItem; j-- != 0;)
            {
                ++i;
                if (i == cItem)
                {
                    if (flags & LVFI_WRAP)
                        i = 0;
                    else
                        break;
                }

                if (ListView_FastGetItemPtr(plv, i)->lParam == lParam)
                    return i;
            }
        }
        else // if (flags & (LVFI_STRING | LVFI_SUBSTRING | LVFI_PARTIAL))
        {
            LPCTSTR pszFind = plvfi->psz;
            if (!pszFind)
                return -1;

            if (plv->ci.style & (LVS_SORTASCENDING | LVS_SORTDESCENDING))
                return ListView_LookupString(plv, pszFind, flags, i + 1);

            for (j = cItem; j-- != 0;)
            {
                ++i;
                if (i == cItem)
                {
                    if (flags & LVFI_WRAP)
                        i = 0;
                    else
                        break;
                }

                if (ListView_CompareString(plv,
                                           i,
                                           pszFind,
                                           (flags & (LVFI_PARTIAL | LVFI_SUBSTRING)), 0) == 0)
                {
                    return i;
                }
            }
        }
    }
    return -1;
}

BOOL ListView_OnGetItemRect(LV* plv, int i, RECT* prc)
{
    LPRECT pRects[LVIR_MAX];

    // validate parameters
    if (!ListView_IsValidItemNumber(plv, i))
    {
        RIPMSG(0, "LVM_GETITEMRECT: invalid index %d", i);
        return FALSE;
    }

    if (!prc || prc->left >= LVIR_MAX || prc->left < 0)
    {
        RIPMSG(0, "LVM_GETITEMRECT: invalid rect pointer");
        return FALSE;
    }

    pRects[0] = NULL;
    pRects[1] = NULL;
    pRects[2] = NULL;
    pRects[3] = NULL;

    pRects[prc->left] = prc;
    ListView_GetRects(plv, i, QUERY_DEFAULT, pRects[LVIR_ICON], pRects[LVIR_LABEL],
                      pRects[LVIR_BOUNDS], pRects[LVIR_SELECTBOUNDS]);
    return TRUE;
}

//
// in:
//      plv
//      iItem           MUST be a valid item index (in range)
// out:
//   prcIcon            icon bounding rect
//   prcLabel           label text bounding rect, for details this is the first column
//   prcBounds          entire item (all text and icon), including columns in details
//   prcSelectionBounds union of icon and label rects, does NOT include columns
//                      in details view

// REARCHITECT raymondc - Need to pass an HDC parameter for measurement
// since sometimes we do this while painting

// This returns rects in Window Coordinates
void ListView_GetRects(LV* plv, int iItem, UINT fQueryLabelRects, 
                       RECT* prcIcon, RECT* prcLabel, RECT* prcBounds,
                       RECT* prcSelectBounds)
{
    ASSERT(plv);
    
    if (ListView_IsReportView(plv))
    {
        ListView_RGetRects(plv, iItem, prcIcon, prcLabel, prcBounds, prcSelectBounds);
    }
    else if (ListView_IsListView(plv))
    {
        ListView_LGetRects(plv, iItem, prcIcon, prcLabel, prcBounds, prcSelectBounds);
    }
    else
    {
        if (ListView_IsOwnerData(plv))
        {
            RECT rcIcon;
            RECT rcTextBounds;
            LISTITEM item;
            
            if (ListView_IsIconView(plv))
                ListView_IGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, &item, FALSE);
            else if (ListView_IsSmallView(plv))
                ListView_SGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, &item, FALSE);
            else if (ListView_IsTileView(plv))
                ListView_TGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, &item, FALSE);
            
            if (prcIcon)
                *prcIcon = rcIcon;
            if (prcLabel)
                *prcLabel = rcTextBounds;
            
            if (prcBounds)
                UnionRect(prcBounds, &rcIcon, &rcTextBounds);
            
            if (prcSelectBounds)
                UnionRect(prcSelectBounds, &rcIcon, &rcTextBounds);
        }
        else
        {
            if (iItem >= ListView_Count(plv))
            {
                return;
            }
            else
            {
                LISTITEM *pitem = ListView_FastGetItemPtr(plv, iItem);
                
                if (pitem->cyFoldedLabel == SRECOMPUTE)
                {
                    _ListView_RecomputeLabelSize(plv, pitem, iItem, NULL, FALSE);
                }
                _ListView_GetRectsFromItem(plv, ListView_IsSmallView(plv), pitem, fQueryLabelRects,
                    prcIcon, prcLabel, prcBounds, prcSelectBounds);
            }
        }
    }
}

void ListView_GetRectsOwnerData(LV* plv, int iItem,
                                RECT* prcIcon, RECT* prcLabel, RECT* prcBounds,
                                RECT* prcSelectBounds, LISTITEM* pitem)
{
    ASSERT(plv);
    ASSERT(ListView_IsOwnerData(plv));
    
    if (ListView_IsReportView(plv))
    {
        ListView_RGetRects(plv, iItem, prcIcon, prcLabel, prcBounds,
            prcSelectBounds);
    }
    else if (ListView_IsListView(plv))
    {
        ListView_LGetRects(plv, iItem, prcIcon, prcLabel, prcBounds,
            prcSelectBounds);
    }
    else
    {
        RECT rcIcon;
        RECT rcTextBounds;
        
        if (ListView_IsIconView(plv))
            ListView_IGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, pitem, TRUE);
        else if (ListView_IsSmallView(plv))
            ListView_SGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, pitem, TRUE);
        else if (ListView_IsTileView(plv))
            ListView_TGetRectsOwnerData(plv, iItem, &rcIcon, &rcTextBounds, pitem, TRUE);
        
        // Don't need to check for folding here, as will have been handled in user data
        // rectangle fetching functions.
        
        if (prcIcon)
            *prcIcon = rcIcon;
        if (prcLabel)
            *prcLabel = rcTextBounds;
        
        if (prcBounds)
            UnionRect(prcBounds, &rcIcon, &rcTextBounds);
        
        if (prcSelectBounds)
            UnionRect(prcSelectBounds, &rcIcon, &rcTextBounds);
    }
}


BOOL ListView_OnRedrawItems(LV* plv, int iFirst, int iLast)
{
    int iCount = ListView_Count(plv);

    if (iFirst < iCount)
    {
        if (iLast >= iCount)
            iLast = iCount - 1;

        while (iFirst <= iLast)
            ListView_InvalidateItem(plv, iFirst++, FALSE, RDW_INVALIDATE | RDW_ERASE);
    }
    return TRUE;
}

// fSelectionOnly       use the selection bounds only, ie. don't include
//                      columns in invalidation if in details view
//
void ListView_InvalidateItemEx(LV* plv, int iItem, BOOL fSelectionOnly,
    UINT fRedraw, UINT maskChanged)
{
    RECT rc;
    LPRECT prcIcon;
    LPRECT prcLabel;
    LPRECT prcBounds;
    LPRECT prcSelectBounds;
    LISTITEM* pitem = NULL;

    if (iItem == -1)
        return;

    // Ok if NULL
    if (plv->hdpa)
        pitem = ListView_GetItemPtr(plv, iItem);


    prcIcon = prcLabel = prcBounds = prcSelectBounds = NULL;

    // if we're in owner draw mode, and there's been a new font,
    // we don't really know what the selection bounds is, so always use the bounds
    // in that case... unless we're in fullrowselect mode
    if (ListView_IsOwnerData(plv) && plv->flags & LVF_CUSTOMFONT &&
       !ListView_FullRowSelect(plv)) 
    {
        fSelectionOnly = FALSE;
    }

    // if we're owner draw, there's no such thing as selection only
    if (plv->ci.style & LVS_OWNERDRAWFIXED)
        fSelectionOnly = FALSE;

    if (fSelectionOnly) 
    {
        // In report mode non-fullrowselect,
        // we have to use the full label rectangle rather
        // than just the selection bounds, since the stuff outside the
        // rectangle might need redrawing, too.

        if (ListView_IsReportView(plv) && !ListView_FullRowSelect(plv))
            prcLabel = &rc;
        else
            prcSelectBounds = &rc;
    } 
    else 
    {
        // if _only_the_text_ or _only_the_image_ changed then limit the redraw
        switch (maskChanged) 
        {

        case LVIF_IMAGE:
            prcIcon = &rc;
            break;

        case LVIF_TEXT:
            prcLabel = &rc;
            break;

        default:
            prcBounds = &rc;
            break;
        }
    }

    if (ListView_RedrawEnabled(plv)) 
    {
        ListView_GetRects(plv, iItem, QUERY_DEFAULT,
            prcIcon, prcLabel, prcBounds, prcSelectBounds);

        if (RECTS_IN_SIZE(plv->sizeClient, rc))
        {
            if (ListView_IsBorderSelect(plv))
            {
                InflateRect(&rc, 4 + g_cxIconMargin, 4 + g_cyIconMargin);     // account for selection border and seperation since drawing otside of icon
                fRedraw |= RDW_ERASE;
            }

            // Affects only allowed if dubble buffering
            if (ListView_IsDoubleBuffer(plv))
            {
                if ((pitem && (pitem->state & LVIS_GLOW)))
                {
                    InflateRect(&rc, GLOW_EXPAND, GLOW_EXPAND);
                    fRedraw |= RDW_ERASE;
                }
            }

            ListView_DebugDrawInvalidRegion(plv, &rc, NULL);
            RedrawWindow(plv->ci.hwnd, &rc, NULL, fRedraw);
        }
    } 
    else 
    {
        // if we're not visible, we'll get a full
        // erase bk when we do become visible, so only do this stuff when
        // we're on setredraw false
        if (!(plv->flags & LVF_REDRAW)) 
        {

            // if we're invalidating that's new (thus hasn't been painted yet)
            // blow it off
            if ((plv->iFirstChangedNoRedraw != -1) &&
                (iItem >= plv->iFirstChangedNoRedraw)) 
            {
                return;
            }

            ListView_GetRects(plv, iItem, QUERY_DEFAULT, 
                prcIcon, prcLabel, prcBounds, prcSelectBounds);

            // Affects only allowed if dubble buffering
            if (ListView_IsDoubleBuffer(plv))
            {
                if (pitem && (pitem->state & LVIS_GLOW))
                {
                    InflateRect(&rc, GLOW_EXPAND, GLOW_EXPAND);
                    fRedraw |= RDW_ERASE;
                }
            }

            if (ListView_IsBorderSelect(plv))
            {
                InflateRect(&rc, 4 + g_cxIconMargin, 4 + g_cyIconMargin);     // account for selection border and seperation since drawing otside of icon
                fRedraw |= RDW_ERASE;
            }

            // if it had the erase bit, add it to our region
            if (RECTS_IN_SIZE(plv->sizeClient, rc))
            {
                HRGN hrgn = CreateRectRgnIndirect(&rc);

                ListView_InvalidateRegion(plv, hrgn);

                if (fRedraw & RDW_ERASE)
                    plv->flags |= LVF_ERASE;
            }
        }
    }
}

// this returns BF_* flags to indicate which if any edge the item I is touching
// or crossing...
UINT LV_IsItemOnViewEdge(LV* plv, LISTITEM* pitem)
{
    RECT rcItem;
    UINT uRet = 0;

    // as far as rcView goes, unfolded label rects determine edge-ness
    _ListView_GetRectsFromItem(plv, ListView_IsSmallView(plv), pitem, QUERY_RCVIEW|QUERY_UNFOLDED,
                               NULL, NULL, &rcItem, NULL);
    // translate from window coordinates to listview coordinate
    OffsetRect(&rcItem, plv->ptOrigin.x, plv->ptOrigin.y);
    // include the rcView buffer
    ListView_AddViewRectBuffer(plv, &rcItem);

    if (rcItem.right >= plv->rcView.right)
        uRet |= BF_RIGHT;

    if (rcItem.left <= plv->rcView.left)
        uRet |= BF_LEFT;

    if (rcItem.top <= plv->rcView.top)
        uRet |= BF_TOP;

    if (rcItem.bottom >= plv->rcView.bottom)
        uRet |= BF_BOTTOM;

    return uRet;
}

// Move pitem to x,y
// Update rcView to accomodate this if we can, or mark rcView for recomputation
void LV_AdjustViewRectOnMove(LV* plv, LISTITEM *pitem, int x, int y)
{
    plv->iFreeSlot = -1; // The "free slot" cache is no good once an item moves

    // if we have to recompute anyways, don't bother
    if (!ListView_IsOwnerData(plv))
    {
        if ((plv->rcView.left != RECOMPUTE) &&
            x != RECOMPUTE && y != RECOMPUTE &&
            pitem->cyFoldedLabel != SRECOMPUTE) 
        {
            RECT rcClient, rcAfter;
            RECT rcView = plv->rcView;

            // Our optimized move-adjust-rcView must maintain this, make sure it's true before we even start:
            ASSERT(ListView_ValidatercView(plv, &plv->rcView, FALSE));

            ListView_GetClientRect(plv, &rcClient, TRUE, NULL);
            ASSERT(ListView_ValidateScrollPositions(plv, &rcClient));

            if (pitem->pt.x != RECOMPUTE) 
            {
                UINT uEdges;

                uEdges = LV_IsItemOnViewEdge(plv, pitem);

                pitem->pt.x = x;
                pitem->pt.y = y;

                // before and after the move, they need to be touching the
                // same edges or not at all
                if (uEdges != LV_IsItemOnViewEdge(plv, pitem)) 
                {
                    goto FullRecompute;
                }
            } 
            else 
            {
                // if the position wasn't set before
                // we just need to find out what it is afterwards and
                // enlarge the view... we don't need to shrink it
                pitem->pt.x = x;
                pitem->pt.y = y;
            }

            _ListView_GetRectsFromItem(plv, ListView_IsSmallView(plv), pitem, QUERY_RCVIEW|QUERY_UNFOLDED,
                                       NULL, NULL, &rcAfter, NULL);
            // translate from window coordinates to listview coordinates
            OffsetRect(&rcAfter, plv->ptOrigin.x, plv->ptOrigin.y);

            // include the rcView buffer
            ListView_AddViewRectBuffer(plv, &rcAfter);

            // if we make it here, we just have to make sure the new view rect
            // encompases this new item
            UnionRect(&rcView, &rcView, &rcAfter);

            DebugMsg(TF_LISTVIEW, TEXT("Score! (%d %d %d %d) was (%d %d %d %d)"),
                     rcView.left, rcView.top, rcView.right, rcView.bottom,
                     plv->rcView.left, plv->rcView.top, plv->rcView.right, plv->rcView.bottom);

            // Our optimized move-adjust-rcView must maintain this:
            ASSERT(ListView_ValidatercView(plv, &rcView, FALSE));
            plv->rcView = rcView;

            // make sure our scroll positions are correct
            if (ListView_IsIScrollView(plv))
                ListView_FixIScrollPositions(plv, FALSE, &rcClient);
            ASSERT(ListView_ValidateScrollPositions(plv, &rcClient));
        } 
        else 
        {
FullRecompute:
            plv->rcView.left = RECOMPUTE;
        }
    }

    DebugMsg(TF_LISTVIEW, TEXT("LV -- AdjustViewRect pitem %d -- (%x, %x)"),
             pitem,
             pitem->pt.x, pitem->pt.y);

    pitem->pt.x = x;
    pitem->pt.y = y;

    // Compute the workarea of this item if applicable
    ListView_FindWorkArea(plv, pitem->pt, &(pitem->iWorkArea));
}

BOOL ListView_OnSetItemPosition(LV* plv, int i, int x, int y)
{
    LISTITEM* pitem;

    if (plv->fGroupView)
        return FALSE;

    if (ListView_IsListView(plv))
        return FALSE;

    if (ListView_IsOwnerData(plv))
    {
       RIPMSG(0, "LVM_SETITEMPOSITION: Invalid for owner-data listview");
       return FALSE;
    }

    pitem = ListView_GetItemPtr(plv, i);
    if (!pitem)
        return FALSE;

    //
    // this is a hack to fix a bug in OLE drag/drop loop
    //
    if (x >= 0xF000 && x < 0x10000)
    {
        DebugMsg(TF_LISTVIEW, TEXT("LV -- On SetItemPosition fixing truncated negative number 0x%08X"), x);
        x = x - 0x10000;
    }

    if (y >= 0xF000 && y < 0x10000)
    {
        DebugMsg(TF_LISTVIEW, TEXT("LV -- On SetItemPosition fixing truncated negative number 0x%08X"), y);
        y = y - 0x10000;
    }

    ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);

    if (pitem->cyFoldedLabel == SRECOMPUTE)
    {
        _ListView_RecomputeLabelSize(plv, pitem, i, NULL, FALSE);
    }

    // erase old

    if (y != pitem->pt.y || x != pitem->pt.x) 
    {
        // Don't invalidate if it hasn't got a position yet
        if (pitem->pt.y != RECOMPUTE) 
        {
            ListView_InvalidateItem(plv, i, FALSE, RDW_INVALIDATE | RDW_ERASE);
        } 
        else if (plv->uUnplaced) 
        {
            // this means an unplaced item got placed
            plv->uUnplaced--;
            if (!plv->uUnplaced) 
            {
                MSG msg;
                // if this is now 0, pull out the postmessage
                PeekMessage(&msg, plv->ci.hwnd, LVMI_PLACEITEMS, LVMI_PLACEITEMS, PM_REMOVE);
            }
        }

        if (y == RECOMPUTE) 
        {
            // if they're setting the new position to be a "any open spot" post that we
            // need to calc this later
            if (!plv->uUnplaced) 
            {
                PostMessage(plv->ci.hwnd, LVMI_PLACEITEMS, 0, 0);
            }
            plv->uUnplaced++;
        }
    }

    DebugMsg(TF_LISTVIEW, TEXT("LV -- On SetItemPosition %d %d %d %d -- (%x, %x)"),
             plv->rcView.left, plv->rcView.top, plv->rcView.right, plv->rcView.bottom,
             pitem->pt.x, pitem->pt.y);


    LV_AdjustViewRectOnMove(plv, pitem, x, y);

    // and draw at new position
    ListView_RecalcRegion(plv, FALSE, TRUE);
    ListView_InvalidateItem(plv, i, FALSE, RDW_INVALIDATE);

    // If autoarrange is turned on, do it now...
    if (ListView_RedrawEnabled(plv)) 
    {
        ListView_ArrangeOrSnapToGrid(plv);
        if (!(plv->ci.style & LVS_AUTOARRANGE))
            ListView_UpdateScrollBars(plv);
    }

    if (!(plv->ci.style & LVS_AUTOARRANGE))
    {
        plv->fIconsPositioned = TRUE;
    }

    return TRUE;
}

BOOL ListView_OnGetItemPosition(LV* plv, int i, POINT* ppt)
{
    LISTITEM* pitem;

    //
    // This needs to handle all views as it is used to figure out
    // where the item is during drag and drop and the like
    //
    if (!ppt)
    {
        RIPMSG(0, "LVM_GETITEMPOSITION: Invalid ppt = NULL");
        return FALSE;
    }

    if (ListView_IsListView(plv) || ListView_IsReportView(plv)
        || ListView_IsOwnerData(plv))
    {
        RECT rcIcon;
        ListView_GetRects(plv, i, QUERY_DEFAULT, &rcIcon, NULL, NULL, NULL);
        ppt->x = rcIcon.left;
        ppt->y = rcIcon.top;

    } 
    else 
    {

        pitem = ListView_GetItemPtr(plv, i);
        if (!pitem)
            return FALSE;

        if (pitem->pt.x == RECOMPUTE)
            ListView_Recompute(plv);

        ppt->x = pitem->pt.x;
        ppt->y = pitem->pt.y;
    }
    return TRUE;
}

BOOL ListView_OnGetOrigin(LV* plv, POINT* ppt)
{
    if (!ppt)
    {
        DebugMsg(DM_ERROR, TEXT("ListView_OnGetOrigin: ppt is NULL"));
        return FALSE;
    }

    if (ListView_IsListView(plv) || ListView_IsReportView(plv))
        return FALSE;

    *ppt = plv->ptOrigin;
    return TRUE;
}

int ListView_OnGetStringWidthA(LV* plv, LPCSTR psz, HDC hdc)
{
    LPWSTR pszW = NULL;
    int iRet;

    if (!psz)
        return 0;

    if ((psz != NULL) && (pszW = ProduceWFromA(plv->ci.uiCodePage, psz)) == NULL)
        return 0;

    iRet = ListView_OnGetStringWidth(plv, pszW, hdc);

    FreeProducedString(pszW);

    return iRet;
}

int ListView_OnGetStringWidth(LV* plv, LPCTSTR psz, HDC hdc)
{
    SIZE siz;
    HDC hdcFree = NULL;
    HFONT hfontPrev;

    if (!psz || psz == LPSTR_TEXTCALLBACK)
        return 0;

    if (!hdc) 
    {
        hdcFree = hdc = GetDC(plv->ci.hwnd);
    }

    hfontPrev = SelectFont(hdc, plv->hfontLabel);
    GetTextExtentPoint(hdc, psz, lstrlen(psz), &siz);
    SelectFont(hdc, hfontPrev);

    if (hdcFree) 
    {
        ReleaseDC(plv->ci.hwnd, hdcFree);
    }

    return siz.cx;
}

int ListView_OnGetColumnWidth(LV* plv, int iCol)
{
    if (ListView_IsReportView(plv))
        return ListView_RGetColumnWidth(plv, iCol);
    else if (ListView_IsListView(plv))
        return plv->cxItem;
    
    return 0;
}

BOOL ListView_ISetColumnWidth(LV* plv, int iCol, int cx, BOOL fExplicit)
{

    if (ListView_IsListView(plv))
    {
        if (iCol != 0 || cx <= 0)
            return FALSE;

        // if it's different and this is an explicit set, or we've never set it explicitly
        if (plv->cxItem != cx && (fExplicit || !(plv->flags & LVF_COLSIZESET)))
        {
            // REVIEW: Should optimize what gets invalidated here...

            plv->cxItem = cx;
            if (fExplicit)
                plv->flags |= LVF_COLSIZESET;   // Set the fact that we explictly set size!.

            if (ListView_IsLabelTip(plv))
            {
                // A truncated label may have been exposed or vice versa.
                ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);
            }

            RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
            ListView_UpdateScrollBars(plv);
        }
        return TRUE;
    }
    else if (ListView_IsReportView(plv))
    {
        if (ListView_IsLabelTip(plv))
        {
            // A truncated label may have been exposed or vice versa.
            ListView_InvalidateTTLastHit(plv, plv->iTTLastHit);
        }
        return ListView_RSetColumnWidth(plv, iCol, cx);
    }
    else
    {
        if (cx && plv->cxItem != cx && (fExplicit || !(plv->flags & LVF_COLSIZESET)))
        {
            // REVIEW: Should optimize what gets invalidated here...
            plv->cxItem = cx;
            if (fExplicit)
                plv->flags |= LVF_COLSIZESET;   // Set the fact that we explictly set size!.

            RedrawWindow(plv->ci.hwnd, NULL, NULL, RDW_INVALIDATE | RDW_ERASE);
            ListView_UpdateScrollBars(plv);
        }
        // BUG-FOR-BUG COMPATIBILITY:  IE4 accidentally returned FALSE here.
    }
    return FALSE;
}

void DrawGradiantLine(HDC hdc, RECT* prcText, RECT* prcGroup)
{
    COLORREF cr1 = GetSysColor(COLOR_GRADIENTACTIVECAPTION);
    COLORREF cr2 = GetSysColor(COLOR_WINDOW);
    TRIVERTEX pt[2];
    GRADIENT_RECT gr;

    RECT rc = {prcGroup->left, prcText->bottom-1, prcGroup->left + GRADIENT_WIDTH, prcText->bottom};

    pt[0].x = rc.left;
    pt[0].y = rc.top;
    pt[1].x = rc.right;
    pt[1].y = rc.bottom;

    pt[0].Red = GetRValue(cr1) << 8;
    pt[0].Green = GetGValue(cr1) << 8;
    pt[0].Blue = GetBValue(cr1) << 8;
    pt[0].Alpha = 0xFF00;
    pt[1].Red = GetRValue(cr2) << 8;
    pt[1].Green = GetGValue(cr2) << 8;
    pt[1].Blue = GetBValue(cr2) << 8;
    pt[1].Alpha = 0x0000;


    gr.UpperLeft = 0;
    gr.LowerRight = 1;

    GdiGradientFill(hdc, pt, 2, &gr, 1, GRADIENT_FILL_RECT_H);

}

void ListView_Redraw(LV* plv, HDC hdc, RECT* prcClip)
{
    int i = 0;
    int cItem = ListView_Count(plv);
    NMCUSTOMDRAW nmcd;
    LVDRAWITEM lvdi = {0};

    SetBkMode(hdc, TRANSPARENT);
    SelectFont(hdc, plv->hfontLabel);

    nmcd.hdc = hdc;

    nmcd.rc = *prcClip;

    plv->ci.dwCustom = CICustomDrawNotify(&plv->ci, CDDS_PREPAINT, &nmcd);
    if (!(plv->ci.dwCustom & CDRF_SKIPDEFAULT)) 
    {
        int cGroups;
        // Just before doing any painting, see if the region is up to date...
        ListView_RecalcRegion(plv, FALSE, TRUE);

        //
        // For list view and report view, we can save a lot of time
        // by calculating the index of the first item that may need
        // painting...
        //

        switch (plv->wView) 
        {
        case LV_VIEW_DETAILS:
            if (!plv->fGroupView)
            {
                i = ListView_RYHitTest(plv, prcClip->top);
                cItem = ListView_RYHitTest(plv, prcClip->bottom) + 1;
            }
            break;

        case LV_VIEW_LIST:
            i = ListView_LCalcViewItem(plv, prcClip->left, prcClip->top);
            cItem = ListView_LCalcViewItem(plv, prcClip->right, prcClip->bottom) + 1;
            break;

        default:
            if (ListView_IsOwnerData(plv))
            {
                ListView_CalcMinMaxIndex(plv, prcClip, &i, &cItem);
                break;
            }
        }

        if (i < 0)
            i = 0;

        cItem = min(ListView_Count(plv), cItem);
        if (ListView_IsOwnerData(plv) && (cItem > i))
        {
            ListView_NotifyCacheHint(plv, i, cItem-1);
            ListView_LazyCreateWinEvents(plv, i, cItem-1);
        }

        lvdi.plv = plv;
        lvdi.nmcd.nmcd.hdc = hdc;
        lvdi.prcClip = prcClip;
        lvdi.pitem = NULL;

        if (plv->hdpaGroups)
        {
            cGroups = DPA_GetPtrCount(plv->hdpaGroups);

            if (plv->fGroupView && cGroups > 0 && ListView_IsGroupedView(plv))
            {
                int iGroup;
                RECT rcClient;
                GetClientRect(plv->ci.hwnd, &rcClient);

                for (iGroup = 0; iGroup < cGroups; iGroup++)
                {
                    LISTGROUP* pgrp = DPA_FastGetPtr(plv->hdpaGroups, iGroup);
                    int cItems = DPA_GetPtrCount(pgrp->hdpa);

                    if (cItems > 0)
                    {
                        RECT rcT;
                        RECT rc;

                        SetRect(&rc, 0,
                                     pgrp->rc.top - LISTGROUP_HEIGHT(plv, pgrp),
                                     rcClient.right,
                                     pgrp->rc.bottom + plv->rcBorder.bottom + plv->paddingBottom);

                        if (ListView_IsReportView(plv))
                        {
                            OffsetRect(&rc, -plv->ptlRptOrigin.x, -plv->ptlRptOrigin.y + plv->yTop);
                        }
                        else
                        {
                            OffsetRect(&rc, -plv->ptOrigin.x, -plv->ptOrigin.y);
                        }


                        if (IntersectRect(&rcT, &rc, prcClip))
                        {
                            NMLVCUSTOMDRAW nmcdGroup = {0};
                            DWORD dwCust;
                            UINT uAlign = LVCFMT_LEFT;
                            HFONT hfontOld;
                            RECT rcBorder = plv->rcBorder;
                            rcBorder.top = max(pgrp->cyTitle + 6, plv->rcBorder.top);
                            nmcdGroup.nmcd.hdc = hdc;
                            nmcdGroup.nmcd.rc = rc;
                            nmcdGroup.nmcd.dwItemSpec = pgrp->iGroupId;
                            nmcdGroup.dwItemType = LVCDI_GROUP;

                            nmcdGroup.rcText.left = rc.left + plv->paddingLeft;
                            nmcdGroup.rcText.top = rc.top;
                            nmcdGroup.rcText.bottom = rc.top + max(pgrp->cyTitle + 6, plv->rcBorder.top);
                            nmcdGroup.rcText.right = rc.right;

                            nmcdGroup.uAlign = pgrp->uAlign;

                            nmcdGroup.clrText = plv->crHeader;

                            dwCust = CICustomDrawNotify(&plv->ci, CDDS_PREPAINT, &nmcdGroup.nmcd);

                            if (!(dwCust & CDRF_SKIPDEFAULT))
                            {
                                RECT rcHeader = {0};
                                if (!(LVCDRF_NOGROUPFRAME & dwCust))
                                {
                                    DrawGradiantLine(hdc, &nmcdGroup.rcText, &nmcdGroup.nmcd.rc);
                                }

                                if (!(dwCust & CDRF_NEWFONT))
                                {
                                    hfontOld = SelectObject(hdc, plv->hfontGroup);
                                }

                                if (nmcdGroup.uAlign & LVGA_HEADER_CENTER)
                                    uAlign = LVCFMT_CENTER;
                                else if (nmcdGroup.uAlign & LVGA_HEADER_RIGHT)
                                    uAlign = LVCFMT_RIGHT;

                                SHDrawText(hdc, pgrp->pszHeader,
                                    &nmcdGroup.rcText, uAlign, SHDT_VCENTER | SHDT_LEFT,
                                    plv->cyLabelChar, plv->cxEllipses,
                                    nmcdGroup.clrText, CLR_NONE);

                                // Need do do this before we unselect so that we get the right font...
                                DrawText(hdc, pgrp->pszHeader, -1, &rcHeader, DT_LV | DT_CALCRECT);

                                if (!(dwCust & CDRF_NEWFONT))
                                {
                                    SelectObject(hdc, hfontOld);
                                }
                            }

                            dwCust = CICustomDrawNotify(&plv->ci, CDDS_POSTPAINT, &nmcdGroup.nmcd);
                        }
                    }
                }
            }
        }

        cItem = min(ListView_Count(plv), cItem);

        for (; i < cItem; i++)
        {
            BOOL bSuccess;
            int i2;

            if (ListView_IsRearrangeableView(plv) && 
                !ListView_IsOwnerData(plv))
            {
                LISTITEM *pitem;

                // Icon views: Draw back-to-front mapped through
                // Z-order array for proper Z order appearance - If autoarrange
                // is on, we don't need to do this as our arrange code is setup
                // to not overlap items!
                //
                // For the cases where we might have overlap, we sped this up,
                // by converting the hdpaZorder into a list of indexes instead
                // of pointers.  This ovoids the costly convert pointer to
                // index call.
                //
                i2 = (int)(UINT_PTR)DPA_FastGetPtr(plv->hdpaZOrder, (cItem - 1) -i);

                //
                // do a fast clip check on the item so we dont even try to
                // draw it unless it is visible
                //
                // for small icon view we cant clip on the left without
                // getting the text
                //
                // for large icon view we cant clip on the top without
                // getting the text
                //
                // for large icon view in NOLABELWRAP mode, we can't clip
                // on the top without getting the text, nor can we clip to
                // the left or right in case the text is long.
                //
                // we can always clip to the bottom
                //
                pitem = ListView_FastGetItemPtr(plv, i2);

                if (pitem && pitem->pt.x != RECOMPUTE)
                {
                    int yBias = 0;
                    if (ListView_IsBorderSelect(plv))
                        yBias = BORDERSELECT_THICKNESS;

                    if (pitem->pt.y - yBias - plv->ptOrigin.y > prcClip->bottom)
                        continue;

                    if (plv->wView == LV_VIEW_SMALLICON)
                    {
                        if (pitem->pt.x - plv->ptOrigin.x - plv->cxState > prcClip->right)
                            continue;

                        if (pitem->pt.y + yBias + plv->cyItem - plv->ptOrigin.y < prcClip->top)
                            continue;
                    }
                    else if (!(plv->ci.style & LVS_NOLABELWRAP))
                    {
                        if (plv->wView == LV_VIEW_TILE)
                        {
                            if (pitem->pt.x - plv->sizeTile.cx - plv->ptOrigin.x > prcClip->right)
                                continue;

                            if (pitem->pt.x + yBias + plv->sizeTile.cx - plv->ptOrigin.x < prcClip->left)
                                continue;
                        }
                        else // LV_VIEW_ICON
                        {
                            if (pitem->pt.x - plv->cxIconSpacing - plv->ptOrigin.x > prcClip->right)
                                continue;

                            if (pitem->pt.x + yBias + plv->cxIconSpacing - plv->ptOrigin.x < prcClip->left)
                                continue;
                        }
                    }
                }
                
                if (plv->fGroupView &&
                    !LISTITEM_HASGROUP(pitem))
                {
                    continue;   // Don't paint items not in a group.
                }
            }
            else
                i2 = i;


            plv->iItemDrawing = i2;

            lvdi.nmcd.nmcd.dwItemSpec = i2;

            // these may get changed
            lvdi.lpptOrg = NULL;
            lvdi.flags = 0;
            lvdi.nmcd.clrText = plv->clrText;
            lvdi.nmcd.clrTextBk = plv->clrTextBk;
            lvdi.nmcd.clrFace = plv->clrBk;
            lvdi.nmcd.iIconEffect = ILD_NORMAL;
            lvdi.nmcd.iIconPhase = 0;


            bSuccess = ListView_DrawItem(&lvdi);

            if (!bSuccess) 
            {
                break;
            }
        }

        if (ListView_IsRearrangeableView(plv) && 
            (ListView_IsOwnerData(plv)) && 
            plv->iFocus != -1) 
        {
            // since there's no zorder in ownerdata, we explicitly draw the focus guy last (again)
            // so that it'll appear on top
            // we may potentially want to do this for all items that are selected
            plv->iItemDrawing = plv->iFocus;

            lvdi.nmcd.nmcd.dwItemSpec = plv->iItemDrawing;

            // these may get changed
            lvdi.lpptOrg = NULL;
            lvdi.flags = 0;
            lvdi.nmcd.clrText = plv->clrText;
            lvdi.nmcd.clrTextBk = plv->clrTextBk;

            ListView_DrawItem(&lvdi);
        }

            
        // this is an NT5/Memphis feature.

        if (ListView_Count(plv) == 0)
        {
            // there're no items in this view
            // check if we need to display some text in this case.

            if (ListView_GetEmptyText(plv))
            {
                RECT rcClip;
                UINT flags = 0;

                // Put some edging between the text and the border of the
                // window so we don't slam up against the border.
                // This keeps DBCS from looking horrid.
                rcClip.left = g_cxEdge;
                rcClip.top = g_cyEdge;

                if (plv->dwExStyle & WS_EX_RTLREADING)
                    flags |= SHDT_RTLREADING;

                // if its a report view && we have a header then move the text down
                if (ListView_IsReportView(plv) && (!(plv->ci.style & LVS_NOCOLUMNHEADER)))
                    rcClip.top += plv->cyItem;

                // Note: Use the full sizeClient.cx as the right margin
                // in case pszEmptyText is wider than the client rectangle.

                rcClip.left -= (int)plv->ptlRptOrigin.x;
                rcClip.right = plv->sizeClient.cx;
                rcClip.bottom = rcClip.top + plv->cyItem;

                SHDrawText(hdc, plv->pszEmptyText,
                    &rcClip, LVCFMT_LEFT, flags,
                    plv->cyLabelChar, plv->cxEllipses,
                    plv->clrText, plv->clrBk);
            }
        }

        plv->iItemDrawing = -1;

        // post painting.... this is to do any extra (non item) painting
        // such a grid lines
        switch (plv->wView) 
        {
        case LV_VIEW_DETAILS:
            ListView_RAfterRedraw(plv, hdc);
            break;
        }

        // Insert mark
        {
            RECT rcInsertMark;
            if (ListView_OnGetInsertMarkRect(plv, &rcInsertMark))
            {
                OffsetRect(&rcInsertMark, -plv->ptOrigin.x, -plv->ptOrigin.y);
                CCDrawInsertMark(hdc,
                                 &rcInsertMark,
                                 ((plv->ci.style & LVS_ALIGNMASK) == LVS_ALIGNTOP),
                                 ListView_OnGetInsertMarkColor(plv));
            }
        }

        // notify parent afterwards if they want us to
        if (plv->ci.dwCustom & CDRF_NOTIFYPOSTPAINT) 
        {
            CICustomDrawNotify(&plv->ci, CDDS_POSTPAINT, &nmcd);
        }
    }
}

BOOL ListView_DrawItem(PLVDRAWITEM plvdi)
{
    BOOL fAllowHotSelection = FALSE;
    BOOL bRet = TRUE;
    UINT state;

    if (!ListView_IsOwnerData(plvdi->plv) && (!plvdi->plv->hdpa || plvdi->nmcd.nmcd.dwItemSpec > (UINT)DPA_GetPtrCount(plvdi->plv->hdpa)))
        return FALSE;

    if (!ListView_IsOwnerData(plvdi->plv)) 
    {
        plvdi->pitem = ListView_FastGetItemPtr(plvdi->plv, plvdi->nmcd.nmcd.dwItemSpec);
    }

    // notify on custom draw then do it!
    plvdi->nmcd.nmcd.uItemState = 0;
    plvdi->nmcd.nmcd.lItemlParam = (plvdi->pitem)? plvdi->pitem->lParam : 0;

    if (!(plvdi->flags & LVDI_NOWAYFOCUS))
    {
        if (plvdi->plv->flags & LVF_FOCUSED) 
        {

            // if we're ownerdraw or asked to callback, go
            // fetch the state
            if (!plvdi->pitem || (plvdi->plv->stateCallbackMask & (LVIS_SELECTED | LVIS_FOCUSED)))
            {
                state = (WORD) ListView_OnGetItemState(plvdi->plv, (int) plvdi->nmcd.nmcd.dwItemSpec,
                                                LVIS_SELECTED | LVIS_FOCUSED);
            } 
            else 
            {
                state = plvdi->pitem->state;
            }


            if (state & LVIS_FOCUSED) 
            {
                plvdi->nmcd.nmcd.uItemState |= CDIS_FOCUS;
            }

            if (state & LVIS_SELECTED) 
            {
                plvdi->nmcd.nmcd.uItemState |= CDIS_SELECTED;
            }
        }

        // NOTE:  This is a bug.  We should set CDIS_SELECTED only if the item
        // really is selected.  But this bug has existed forever so who knows
        // what apps are relying on it.  Standard workaround is for the client
        // to do a GetItemState and reconfirm the LVIS_SELECTED flag.
        // That's what we do in ListView_DrawImageEx.
        if (plvdi->plv->ci.style & LVS_SHOWSELALWAYS)
        {
            plvdi->nmcd.nmcd.uItemState |= CDIS_SELECTED;
        }
    }

    if (!(CCGetUIState(&(plvdi->plv->ci)) & UISF_HIDEFOCUS))
    {
        plvdi->nmcd.nmcd.uItemState |= CDIS_SHOWKEYBOARDCUES;
    }

    plvdi->nmcd.clrText = plvdi->plv->clrText;
    plvdi->nmcd.clrTextBk = (plvdi->plv->ci.style & WS_DISABLED ? plvdi->plv->clrBk : plvdi->plv->clrTextBk);


    if ((plvdi->plv->exStyle & LVS_EX_UNDERLINEHOT) &&
        plvdi->plv->iHot == (int)plvdi->nmcd.nmcd.dwItemSpec &&
        (plvdi->plv->exStyle & LVS_EX_ONECLICKACTIVATE) ||
        ((plvdi->plv->exStyle & LVS_EX_TWOCLICKACTIVATE) &&
         ListView_OnGetItemState(plvdi->plv, (int) plvdi->nmcd.nmcd.dwItemSpec, LVIS_SELECTED))) 
    {

        fAllowHotSelection = TRUE;
        // Handle the HOT case
        if (plvdi->plv->clrHotlight != CLR_DEFAULT)
        {
            plvdi->nmcd.clrText = plvdi->plv->clrHotlight;
        }
        else
        {
            plvdi->nmcd.clrText = GetSysColor(COLOR_HOTLIGHT);
        }

        // if hotlight color is the same as the background
        // color you don't see the text -- slam to a visible color in this case.
        if (plvdi->nmcd.clrText == plvdi->nmcd.clrTextBk)
        {
            if (COLORISLIGHT(plvdi->nmcd.clrTextBk))
                plvdi->nmcd.clrText = 0x000000; // black
            else
                plvdi->nmcd.clrText = 0xFFFFFF; // white
        }

        SelectFont(plvdi->nmcd.nmcd.hdc, plvdi->plv->hFontHot);

        plvdi->nmcd.nmcd.uItemState |= CDIS_HOT;
    } 
    else if ((plvdi->plv->exStyle & LVS_EX_ONECLICKACTIVATE) ||
               ((plvdi->plv->exStyle & LVS_EX_TWOCLICKACTIVATE) &&
                ListView_OnGetItemState(plvdi->plv, (int) plvdi->nmcd.nmcd.dwItemSpec, LVIS_SELECTED))) 
    {
                    
        // Handle the non-hot webview case
        if ((plvdi->plv->exStyle & LVS_EX_UNDERLINECOLD) && 
            plvdi->plv->hFontHot)
        {
            SelectFont(plvdi->nmcd.nmcd.hdc, plvdi->plv->hFontHot);
        }
        else
        {
            SelectFont(plvdi->nmcd.nmcd.hdc, plvdi->plv->hfontLabel);
        }
    } 
    else 
    {
        // Handle the non-webview case
        SelectFont(plvdi->nmcd.nmcd.hdc, plvdi->plv->hfontLabel);
    }


    plvdi->dwCustom = CICustomDrawNotify(&plvdi->plv->ci, CDDS_ITEMPREPAINT, &plvdi->nmcd.nmcd);

    plvdi->flags &= ~(LVDI_FOCUS | LVDI_SELECTED);
    if (plvdi->nmcd.nmcd.uItemState & CDIS_FOCUS)
        plvdi->flags |= LVDI_FOCUS;

    if (plvdi->nmcd.nmcd.uItemState & CDIS_SELECTED)
    {
        if (plvdi->plv->flags & LVF_FOCUSED)
            plvdi->flags |= LVDI_SELECTED;
        else
            plvdi->flags |= LVDI_SELECTNOFOCUS;
        if (plvdi->plv->iHot == (int)plvdi->nmcd.nmcd.dwItemSpec && fAllowHotSelection)
            plvdi->flags |= LVDI_HOTSELECTED;
    }

    if (!(plvdi->dwCustom & CDRF_SKIPDEFAULT)) 
    {

        if (!ListView_IsOwnerData(plvdi->plv)) 
        {
            if (plvdi->dwCustom & CDRF_NEWFONT) 
            {
                _ListView_RecomputeLabelSize(plvdi->plv, plvdi->pitem, (int) plvdi->nmcd.nmcd.dwItemSpec, plvdi->nmcd.nmcd.hdc, FALSE);
            }
        }

        bRet = _ListView_DrawItem(plvdi);


        if (plvdi->dwCustom & CDRF_NOTIFYPOSTPAINT) 
        {
            plvdi->nmcd.iSubItem = 0;
            CICustomDrawNotify(&plvdi->plv->ci, CDDS_ITEMPOSTPAINT, &plvdi->nmcd.nmcd);
        }

        if (plvdi->dwCustom & CDRF_NEWFONT)
        {
            SelectObject(plvdi->nmcd.nmcd.hdc, plvdi->plv->hfontLabel);
            plvdi->plv->flags |= LVF_CUSTOMFONT;
        }
    }
    return bRet;
}

void WINAPI SHThemeDrawText(HTHEME hTheme, HDC hdc, int iPartId, int iStateId, LPCTSTR pszText, RECT* prc, int fmt,
                UINT flags, int cyChar, int cxEllipses, COLORREF clrText, COLORREF clrTextBk)
{
    int cchText;
    COLORREF clrSave = GetTextColor(hdc), clrSaveBk = 0;
    RECT rc;
    UINT uETOFlags = 0;
    BOOL fForeOnly = FALSE;
    TCHAR ach[CCHLABELMAX + CCHELLIPSES];
    int align;
    BOOL fUseShadowedText = (flags & SHDT_SHADOWTEXT) && (!g_fHighContrast);

    if (!pszText)
        return;

    if (IsRectEmpty(prc))
        return;

    if (flags & SHDT_RTLREADING) 
    {
        align = GetTextAlign(hdc);
        SetTextAlign(hdc, align | TA_RTLREADING);
    }


    rc = *prc;

    if (fUseShadowedText)
    {
        if (!AreAllMonitorsAtLeast(16))
            fUseShadowedText = FALSE;
    }

    // If needed, add in a little extra margin...
    //
    if (flags & SHDT_EXTRAMARGIN)
    {
        rc.left  += g_cxLabelMargin * 3;
        rc.right -= g_cxLabelMargin * 3;
    }
    else if (!(flags & SHDT_NOMARGIN))
    {
        rc.left  += g_cxLabelMargin;
        rc.right -= g_cxLabelMargin;
    }

    if ((rc.left >= rc.right) && !(flags & (SHDT_SELECTED | SHDT_DESELECTED | SHDT_SELECTNOFOCUS)))
        return;

    if ((flags & SHDT_ELLIPSES) &&
            ListView_NeedsEllipses(hdc, pszText, &rc, &cchText, cxEllipses))
    {
        // In some cases cchText was comming back bigger than
        // ARRYASIZE(ach), so we need to make sure we don't overflow the buffer

        // if cchText is too big for the buffer, truncate it down to size
        if (cchText >= ARRAYSIZE(ach) - CCHELLIPSES)
        {
            cchText = ARRAYSIZE(ach) - CCHELLIPSES - 1;
        }

        memcpy(ach, pszText, cchText * sizeof(TCHAR));
        StringCchCopy(ach+cchText, ARRAYSIZE(ach)-cchText, c_szEllipses);

        pszText = ach;

        // Left-justify, in case there's no room for all of ellipses
        //
        fmt = LVCFMT_LEFT;

        cchText += CCHELLIPSES;
    }
    else
    {
        cchText = lstrlen(pszText);
    }

    if (((clrTextBk == CLR_NONE) && !(flags & (SHDT_SELECTED | SHDT_SELECTNOFOCUS))) || (flags & SHDT_TRANSPARENT))
    {
        fForeOnly = TRUE;
        clrSave = SetTextColor(hdc, (flags & SHDT_TRANSPARENT) ? 0 : clrText);
    }
    else if (!hTheme || clrTextBk != CLR_NONE)
    {
        HBRUSH hbrUse = NULL;
        HBRUSH hbrDelete = NULL;

        uETOFlags |= ETO_OPAQUE;

        if ((flags & SHDT_SELECTED || flags & SHDT_SELECTNOFOCUS) && !(flags & SHDT_NOSELECTED))
        {
            fUseShadowedText = FALSE;
            if (flags & SHDT_SELECTNOFOCUS)
            {
                clrText = g_clrBtnText;
                clrTextBk = g_clrBtnFace;
                if (flags & SHDT_DRAWTEXT)
                {
                    hbrUse = g_hbrBtnFace;
                }
            }
            else
            {
                clrText = g_clrHighlightText;
                if (flags & SHDT_HOTSELECTED)
                    clrTextBk = GetSysColor(COLOR_HOTLIGHT);
                else
                    clrTextBk = g_clrHighlight;

                if (flags & SHDT_DRAWTEXT)
                    hbrUse = (flags & SHDT_HOTSELECTED)?GetSysColorBrush(COLOR_HOTLIGHT): g_hbrHighlight;
            }
        }
        else if (clrText == CLR_DEFAULT && clrTextBk == CLR_DEFAULT)
        {
            fUseShadowedText = FALSE;
            clrText = g_clrWindowText;
            clrTextBk = g_clrWindow;

            if ((flags & (SHDT_DRAWTEXT | SHDT_DESELECTED)) ==
               (SHDT_DRAWTEXT | SHDT_DESELECTED))
            {
                hbrUse = g_hbrWindow;
            }
        }
        else
        {
            if (clrText == CLR_DEFAULT)
                clrText =  g_clrWindowText;

            if (clrTextBk == CLR_DEFAULT)
                clrTextBk = g_clrWindow;

            if (fUseShadowedText == FALSE &&
                ((flags & (SHDT_DRAWTEXT | SHDT_DESELECTED)) ==
               (SHDT_DRAWTEXT | SHDT_DESELECTED) || hTheme))
            {
                hbrUse = CreateSolidBrush(GetNearestColor(hdc, clrTextBk));
                if (hbrUse)
                {
                    hbrDelete = hbrUse;
                }
                else
                    hbrUse = GetStockObject(WHITE_BRUSH);
            }
        }

        // now set it
        clrSave = SetTextColor(hdc, clrText);
        clrSaveBk = SetBkColor(hdc, clrTextBk);
        if (hbrUse)
        {
            FillRect(hdc, prc, hbrUse);
            if (hbrDelete)
                DeleteObject(hbrDelete);
        }
    }

    // If we want the item to display as if it was depressed, we will
    // offset the text rectangle down and to the left
    if (flags & SHDT_DEPRESSED)
        OffsetRect(&rc, g_cxBorder, g_cyBorder);

    if (flags & SHDT_DRAWTEXT || hTheme)
    {
        HRESULT hr = E_FAIL;
        UINT uDTFlags;
        if (flags & SHDT_DRAWTEXT)
        {
            uDTFlags= DT_LVWRAP | DT_END_ELLIPSIS;
        }
        else
        {
            uDTFlags = DT_END_ELLIPSIS | DT_SINGLELINE | DT_VCENTER;
            if (fmt & LVCFMT_CENTER)
                uDTFlags |= DT_CENTER;
            else if (fmt & LVCFMT_RIGHT)
                uDTFlags |= DT_RIGHT;
        }

        if (flags & SHDT_DTELLIPSIS)
            uDTFlags |= DT_WORD_ELLIPSIS;

        if (!(flags & SHDT_CLIPPED))
            uDTFlags |= DT_NOCLIP;

        if (flags & SHDT_NODBCSBREAK)
            uDTFlags |= DT_NOFULLWIDTHCHARBREAK;

        if (flags & SHDT_VCENTER)
            uDTFlags |= DT_VCENTER | DT_SINGLELINE;

        if (flags & SHDT_LEFT)
            uDTFlags = DT_LEFT | uDTFlags & ~DT_CENTER;

        if (fUseShadowedText)
        {
            DrawShadowText(hdc, pszText, cchText, &rc, uDTFlags, RGB(255,255,255), RGB(0,0,0), 2, 2);
        }
        else
        {
            if (hTheme)
                hr = DrawThemeText(hTheme, hdc, iPartId, iStateId, pszText, -1, uDTFlags, 0, &rc);

            if (FAILED(hr))
            DrawText(hdc, pszText, cchText, &rc, uDTFlags);
        }
    }
    else
    {
        if (fmt != LVCFMT_LEFT)
        {
            SIZE siz;

            GetTextExtentPoint(hdc, pszText, cchText, &siz);

            if (fmt == LVCFMT_CENTER)
                rc.left = (rc.left + rc.right - siz.cx) / 2;
            else    // fmt == LVCFMT_RIGHT
                rc.left = rc.right - siz.cx;
        }

        // Center vertically in case the bitmap (to the left) is larger than
        // the height of one line
        rc.top += (rc.bottom - rc.top - cyChar) / 2;

        if (flags & SHDT_CLIPPED)
           uETOFlags |= ETO_CLIPPED;

        // HACK:  ExtTextOut() has an off-by-one bug in its rendering of RTL
        //        text.  We need this hack to render properly (RAID 439915).
        //        Note that this bug is NOT present in the DrawText() API.
        if (flags & SHDT_RTLREADING)
            rc.left--;

        ExtTextOut(hdc, rc.left, rc.top, uETOFlags, prc, pszText, cchText, NULL);
    }

    if (flags & (SHDT_SELECTED | SHDT_DESELECTED | SHDT_TRANSPARENT))
    {
        SetTextColor(hdc, clrSave);
        if (!fForeOnly)
            SetBkColor(hdc, clrSaveBk);
    }

    if (flags & SHDT_RTLREADING)
        SetTextAlign(hdc, align);
}

void WINAPI SHDrawText(HDC hdc, LPCTSTR pszText, RECT* prc, int fmt,
                UINT flags, int cyChar, int cxEllipses, COLORREF clrText, COLORREF clrTextBk)
{
    SHThemeDrawText(NULL, hdc, 0, 0, pszText, prc, fmt,
                flags, cyChar, cxEllipses, clrText, clrTextBk);
}



/*----------------------------------------------------------------
** Create an imagelist to be used for dragging.
**
** 1) create mask and image bitmap matching the select bounds size
** 2) draw the text to both bitmaps (in black for now)
** 3) create an imagelist with these bitmaps
** 4) make a dithered copy of the image onto the new imagelist
**----------------------------------------------------------------*/
HIMAGELIST ListView_OnCreateDragImage(LV *plv, int iItem, LPPOINT lpptUpLeft)
{
    HWND hwndLV = plv->ci.hwnd;
    RECT rcBounds, rcImage, rcLabel;
    HDC hdcMem = NULL;
    HBITMAP hbmImage = NULL;
    HBITMAP hbmMask = NULL;
    HBITMAP hbmOld;
    HIMAGELIST himl = NULL;
    int dx, dy;
    HIMAGELIST himlSrc;
    LV_ITEM item;
    POINT ptOrg;
    LVDRAWITEM lvdi = {0};
    RECT rcSelBounds;
    BOOL bMirroredWnd = (plv->ci.dwExStyle&RTL_MIRRORED_WINDOW);
    int iImageList;

    if (!lpptUpLeft)
        return NULL;

    if (iItem >= ListView_Count(plv))
        return NULL;

    if (plv->iHot == iItem)
    {
        ListView_OnSetHotItem(plv, -1);
        UpdateWindow(plv->ci.hwnd);
    }

    ListView_GetRects(plv, iItem, QUERY_DEFAULT, &rcImage, &rcLabel, &rcBounds, &rcSelBounds);

    if (ListView_IsIconView(plv)) 
    {
        ListView_UnfoldRects(plv, iItem, &rcImage, &rcLabel,
                                         &rcBounds, &rcSelBounds);
        InflateRect(&rcImage, -g_cxIconMargin, -g_cyIconMargin);
    }

    // chop off any extra filler above icon
    ptOrg.x = rcBounds.left - rcSelBounds.left;
    ptOrg.y = rcBounds.top - rcImage.top;
    dx = rcSelBounds.right - rcSelBounds.left;
    dy = rcSelBounds.bottom - rcImage.top;

    lpptUpLeft->x = rcSelBounds.left;
    lpptUpLeft->y = rcImage.top;

    if (!(hdcMem = CreateCompatibleDC(NULL)))
        goto CDI_Exit;
    if (!(hbmImage = CreateColorBitmap(dx, dy)))
        goto CDI_Exit;
    if (!(hbmMask = CreateMonoBitmap(dx, dy)))
        goto CDI_Exit;

    //
    // Mirror the memory DC so that the transition from
    // mirrored(memDC)->non-mirrored(imagelist DCs)->mirrored(screenDC)
    // is consistent. [samera]
    //
    if (bMirroredWnd)
    {
        SET_DC_RTL_MIRRORED(hdcMem);
    }

    // prepare for drawing the item
    SelectObject(hdcMem, plv->hfontLabel);
    SetBkMode(hdcMem, TRANSPARENT);

    lvdi.plv = plv;
    lvdi.nmcd.nmcd.dwItemSpec = iItem;
    lvdi.pitem = NULL;  // make sure it is null as Owner data uses this to trigger things...
    lvdi.nmcd.nmcd.hdc = hdcMem;
    lvdi.lpptOrg = &ptOrg;
    lvdi.prcClip = NULL;
    lvdi.flags = LVDI_NOIMAGE | LVDI_TRANSTEXT | LVDI_NOWAYFOCUS | LVDI_UNFOLDED;
    lvdi.nmcd.clrFace = CLR_NONE;
    /*
    ** draw the text to both bitmaps
    */
    hbmOld = SelectObject(hdcMem, hbmImage);
    // fill image with black for transparency
    PatBlt(hdcMem, 0, 0, dx, dy, BLACKNESS);
    ListView_DrawItem(&lvdi);
    if (bMirroredWnd)
        MirrorBitmapInDC(hdcMem, hbmImage);

    lvdi.flags = LVDI_NOIMAGE | LVDI_TRANSTEXT | LVDI_NOWAYFOCUS | LVDI_UNFOLDED;
    SelectObject(hdcMem, hbmMask);
    // fill mask with white for transparency
    PatBlt(hdcMem, 0, 0, dx, dy, WHITENESS);
    ListView_DrawItem(&lvdi);
    if (bMirroredWnd)
        MirrorBitmapInDC(hdcMem, hbmMask);

    // unselect objects that we used
    SelectObject(hdcMem, hbmOld);
    SelectObject(hdcMem, g_hfontSystem);

    if (ListView_IsIconView(plv) || ListView_IsTileView(plv))
        iImageList = LVSIL_NORMAL;
    else
        iImageList = LVSIL_SMALL;


    himlSrc = ListView_OnGetImageList(plv, iImageList);

    /*
    ** make an image list that for now only has the text
    ** we use ImageList_Clone so we get a imagelist that
    ** the same color depth as our own imagelist
    */
    if (!(himl = ImageList_Clone(himlSrc, dx, dy, ILC_MASK, 1, 0)))
        goto CDI_Exit;

    ImageList_SetBkColor(himl, CLR_NONE);
    ImageList_Add(himl, hbmImage, hbmMask);

    /*
    ** make a dithered copy of the image part onto our bitmaps
    ** (need both bitmap and mask to be dithered)
    */
    if (himlSrc)
    {
        item.iItem = iItem;
        item.iSubItem = 0;
        item.mask = LVIF_IMAGE |LVIF_STATE;
        item.stateMask = LVIS_OVERLAYMASK;
        ListView_OnGetItem(plv, &item);

        ImageList_CopyDitherImage(himl, 0, rcImage.left - rcSelBounds.left, 0, himlSrc, item.iImage, ((plv->ci.dwExStyle & dwExStyleRTLMirrorWnd) ? ILD_MIRROR : 0L) | (item.state & LVIS_OVERLAYMASK));
    }

CDI_Exit:
    if (hdcMem)
        DeleteObject(hdcMem);
    if (hbmImage)
        DeleteObject(hbmImage);
    if (hbmMask)
        DeleteObject(hbmMask);

    return himl;
}

// ListView_OnGetTopIndex -- Gets the index of the first visible item
// For list view and report view this calculates the actual index
// for iconic views it alway returns 0
//
int ListView_OnGetTopIndex(LV* plv)
{
    if (ListView_IsReportView(plv) && !plv->fGroupView)
        return (int)((plv->ptlRptOrigin.y) / plv->cyItem);
    else if (ListView_IsListView(plv))
        return (plv->xOrigin / plv->cxItem) * plv->cItemCol;
    else
        return 0;
}


// ListView_OnGetCountPerPage -- Gets the count of items that will fit
// on a page For list view and report view this calculates the
// count depending on the size of the window and for Iconic views it
// will always return the count of items in the list view.
//
int ListView_OnGetCountPerPage(LV* plv)
{
    if (ListView_IsReportView(plv))
        return (plv->sizeClient.cy - plv->yTop) / plv->cyItem;

    else if (ListView_IsListView(plv))
        return ((plv->sizeClient.cx)/ plv->cxItem)
                * plv->cItemCol;
    else
        return (ListView_Count(plv));
}


/* Purpose:
/   Provides support for invalidating items within list views.
/
/ Notes:
/   Copes with invalidating the extra region in the list view that requires
/   us to erase the background.  Design to optimise out the ERASURE of the
/   background.
/
/   For details on the API see ListView_InvalidateItem.
/
/ In:
/   plv->ListView structure to work with
/   iItem = item number
/   bSrelectionOnly = refesh the selection
/   fRedraw = Flags for RedrawWindow
/ Out:
/   -
*/

void ListView_InvalidateFoldedItem(LV* plv, int iItem, BOOL fSelectionOnly, UINT fRedraw)
{
    ListView_InvalidateItem(plv, iItem, fSelectionOnly, fRedraw);

    if (ListView_IsIconView(plv) &&
        (!ListView_IsItemUnfolded(plv, iItem) || (fRedraw & RDW_ERASE)))
    {
        RECT rcLabel;

        if (ListView_GetUnfoldedRect(plv, iItem, &rcLabel))
        {
            RedrawWindow(plv->ci.hwnd, &rcLabel, NULL, fRedraw|RDW_ERASE);
        }
    }
}


/*
/ Purpose:
/   Having previously called get rects, then call this function to ensure
/   that they are correctly unfolded.
/
/ Notes:
/   -
/
/ In:
/   plv-> list view to unfold on
/   iItem = item number
/   prcIcon -> icon bounding box
/   prcLabel -> rectangle for the label structure
/   prcBounds -> bounds rectangle / == NULL for none    / These are currently the same for large icons
/   prcSelectBounds -> selection bounds / == NULL       /
/ Out: TRUE if unfolding the item was worth anything
/   -
*/
BOOL ListView_UnfoldRects(LV* plv, int iItem,
                               RECT * prcIcon, RECT * prcLabel,
                               RECT * prcBounds, RECT * prcSelectBounds)
{
    LISTITEM item;
    LISTITEM* pitem = &item;
    BOOL fRc = FALSE;

    if (!ListView_IsIconView(plv))
        return fRc;

    // If we have a label pointer then expand as required
    // nb - different paths for owner data

    if (prcLabel)
    {
        if (!ListView_IsOwnerData(plv))
        {
            pitem = ListView_GetItemPtr(plv, iItem);
            if (!EVAL(pitem))
            {
                // DavidShi was able to get us into here with an invalid
                // item number during a delete notification.  So if the
                // item number is invalid, just return a blank rectangle
                // instead of faulting.
                SetRectEmpty(prcLabel);
                goto doneLabel;
            }
        }
        else
        {
            _ListView_RecomputeLabelSize(plv, pitem, iItem, NULL, FALSE);
        }

        if (prcLabel->bottom != prcLabel->top + max(pitem->cyUnfoldedLabel, pitem->cyFoldedLabel))
            fRc = TRUE;

        // In HideLabel mode it's always "worthwhile" to "unfold" the rects because the label is not shown
        // by default.  By returning TRUE we cause the item's label to display in a tooltip where the label
        // would normally be.
        if (ListView_HideLabels(plv))
            fRc = TRUE;

        prcLabel->bottom = prcLabel->top + pitem->cyUnfoldedLabel;
    }
doneLabel:

    // Build the unions if required
    if (prcBounds && prcIcon && prcLabel)
    {
        ListView_CalcBounds(plv, QUERY_UNFOLDED, prcIcon, prcLabel, prcBounds);
    }
    if (prcSelectBounds && prcIcon && prcLabel)
    {
        if (ListView_HideLabels(plv))
            *prcBounds = *prcIcon;
        else
            UnionRect(prcSelectBounds, prcIcon, prcLabel);
    }

    return fRc;
}



void ListView_InvalidateMark(LV* plv)
{
    RECT rc;

    if (ListView_OnGetInsertMarkRect(plv, &rc))
    {
        OffsetRect(&rc, -plv->ptOrigin.x, -plv->ptOrigin.y);
        InvalidateRect(plv->ci.hwnd, &rc, TRUE);
    }
}


// Returns the insertmark rect in listview coordinates. Returns FALSE if there is no insertmarkrect
BOOL ListView_OnGetInsertMarkRect(LV* plv, LPRECT prc)
{
    BOOL fVert;
    RECT rcSlot;
    LISTITEM *pitem;

    if (plv->iInsertItem == -1)
        return FALSE;

    pitem = ListView_GetItemPtr(plv, plv->iInsertItem);
    if (!pitem)
    {
        return FALSE;
    }

    fVert = !((plv->ci.style & LVS_ALIGNMASK) == LVS_ALIGNTOP);

    ListView_CalcItemSlotAndRect(plv, pitem, NULL, &rcSlot);

    if (fVert)
    {
        int iY;
        prc->left = rcSlot.left;
        prc->right = rcSlot.right;
        iY = (plv->fInsertAfter) ? rcSlot.bottom : rcSlot.top;
        prc->top = iY - INSERTMARKSIZE/2;
        prc->bottom = iY + INSERTMARKSIZE/2 + 1;
    }
    else
    {
        int iX;
        prc->top = rcSlot.top;
        prc->bottom = rcSlot.bottom;
        iX = (plv->fInsertAfter) ? rcSlot.right : rcSlot.left;
        prc->left = iX - INSERTMARKSIZE/2;
        prc->right = iX + INSERTMARKSIZE/2 + 1;
    }
    return TRUE;

}

COLORREF ListView_OnGetInsertMarkColor(LV* plv)
{
    if (plv->clrim == CLR_DEFAULT)
        return plv->clrText;
    else
        return plv->clrim;
}