#include "stdafx.h" #pragma hdrstop // 98/10/02 vtan: Multiple monitor bug fixes. // Given an old monitor layout, a new monitor layout and a component // this function makes sure that it is in the new layout using a // monitor relative scheme. It tries to preserve the position // relatively within a given monitor. If the resolution of the monitor // changes then this needs to be accounted for also. // Preserve the component within a given monitor if the monitor is the // same HMONITOR but the GDI co-ordinates change. // If the same monitor cannot be located then move the component to the // nearest monitor and position it as best on that monitor. // If all else fails then use the default component positioning // algorithm. This should never happen. // Preserve the component within a given monitor if the resolution // changes. Preserve the size of the component by MOVING the component // in the X and Y axis until the left or the top of the monitor is // reached. When either axis reaches 0 then reduce the size of the // component until it fits within the given new resolution. static const int kNameSize = 16; typedef struct { HMONITOR miHMONITOR; RECT miDisplayAreaRect, miWorkAreaRect; } tMonitorInfoRec, *tMonitorInfoPtr; typedef struct { int miaCount, miaIndex; RECT miaVirtualScreen; tMonitorInfoRec miaMonitors[1]; } tMonitorInfoArrayRec, *tMonitorInfoArrayPtr; typedef struct { BOOL ciValidData, ciVisible, ciRepositioned; TCHAR ciName[kNameSize]; // this is not excessive but limited DWORD ciItemState; int ciType; COMPPOS ciPosition; COMPSTATEINFO ciStateInfo; } tComponentInfoRec, *tComponentInfoPtr; static tMonitorInfoArrayPtr gOldMonitorArray = NULL; static tMonitorInfoArrayPtr gNewMonitorArray = NULL; // Functions located in Dutil.cpp used for co-ordinate mapping. void SetPt (POINT& pt, LONG x, LONG y); void OffsetPt (POINT& pt, LONG dh, LONG dv); void CalculateVirtualScreen (RECT& virtualScreen); // Local function prototypes. BOOL CALLBACK MonitorCountEnumProc (HMONITOR hMonitor, HDC dc, RECT *rc, LPARAM data); BOOL CALLBACK MonitorCalculateEnumProc (HMONITOR hMonitor, HDC dc, RECT *rc, LPARAM data); HRESULT CalculateCurrentMonitorArray(void); void ApplyCurrentMonitorArray (void); int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, HMONITOR hMonitor); int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, POINT& pt); int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, RECT& rc); BOOL RepositionDesktopRect (RECT& rcComponent, tMonitorInfoArrayPtr oldMonitorArray, tMonitorInfoArrayPtr newMonitorArray); BOOL RepositionDesktopComponent (COMPPOS& componentPosition, COMPSTATEINFO& componentStateInfo, DWORD dwItemState); BOOL ReadAllComponents (HKEY hKeyDesktop, tComponentInfoPtr& pComponentInfo, DWORD& dwComponentCount); void WriteAllComponents (HKEY hKeyDesktop, tComponentInfoPtr pComponentInfo, DWORD dwComponentCount); BOOL CALLBACK MonitorCountEnumProc (HMONITOR hMonitor, HDC dc, RECT *rc, LPARAM data) // Count the number of monitors attached to the system. { int *iCounter; iCounter = reinterpret_cast(data); ++(*iCounter); return(TRUE); } BOOL CALLBACK MonitorCalculateEnumProc (HMONITOR hMonitor, HDC dc, RECT *rc, LPARAM data) // Store each monitor HMONITOR and dimensions in the array. { tMonitorInfoArrayPtr monitorArray; MONITORINFO monitorInfo; monitorArray = reinterpret_cast(data); monitorInfo.cbSize = sizeof(monitorInfo); // adding monitors in the space of a few nanoseconds isnt a real attack vector, but double-check // against the size of the array we allocated if ((GetMonitorInfo(hMonitor, &monitorInfo) != 0) && (monitorArray->miaIndex < monitorArray->miaCount)) { tMonitorInfoPtr pMI; pMI = &monitorArray->miaMonitors[monitorArray->miaIndex++]; pMI->miHMONITOR = hMonitor; TBOOL(CopyRect(&pMI->miDisplayAreaRect, &monitorInfo.rcMonitor)); TBOOL(CopyRect(&pMI->miWorkAreaRect, &monitorInfo.rcWork)); } return(TRUE); } HRESULT CalculateCurrentMonitorArray(void) // Allocate and fill the monitor rectangle array. { HRESULT hr = E_OUTOFMEMORY; int iCount; iCount = 0; TBOOL(EnumDisplayMonitors(NULL, NULL, MonitorCountEnumProc, reinterpret_cast(&iCount))); gNewMonitorArray = reinterpret_cast(LocalAlloc(LMEM_FIXED, sizeof(tMonitorInfoArrayRec) + ((iCount - 1) * sizeof(tMonitorInfoRec)))); if (gNewMonitorArray) { gNewMonitorArray->miaCount = iCount; gNewMonitorArray->miaIndex = 0; CalculateVirtualScreen(gNewMonitorArray->miaVirtualScreen); TBOOL(EnumDisplayMonitors(NULL, NULL, MonitorCalculateEnumProc, reinterpret_cast(gNewMonitorArray))); hr = S_OK; } return hr; } void ApplyCurrentMonitorArray (void) // Discard the old and save the new as current monitor // rectangle array for the next time the function is called. { if (gOldMonitorArray != NULL) (HLOCAL)LocalFree(gOldMonitorArray); gOldMonitorArray = gNewMonitorArray; gNewMonitorArray = NULL; } // These functions determine the index into the monitor // rectangle array of a given HMONITOR, POINT or RECT. int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, HMONITOR hMonitor) { int i, iLimit, iResult; tMonitorInfoPtr pMI; iResult = -1; for (i = 0, iLimit = pMIA->miaCount, pMI = pMIA->miaMonitors; i < iLimit; ++i, ++pMI) { if (pMI->miHMONITOR == hMonitor) { iResult = i; break; } } return(iResult); } // Note that the functions that take a POINT or RECT // require the co-ordinates to be in TRIDENT co-ordinates. int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, POINT& pt) { int i, iLimit, iResult; tMonitorInfoPtr pMI; POINT ptLocal; ptLocal = pt; OffsetPt(ptLocal, +pMIA->miaVirtualScreen.left, +pMIA->miaVirtualScreen.top); iResult = -1; for (i = 0, iLimit = pMIA->miaCount, pMI = pMIA->miaMonitors; i < iLimit; ++i, ++pMI) { if (PtInRect(&pMI->miDisplayAreaRect, ptLocal) != 0) { iResult = i; break; } } return(iResult); } int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, RECT& rc) { int iResult; POINT pt; // 99/05/12 #338446 vtan: Try all four corners of the rectangle // to find a match. pt.x = rc.left; pt.y = rc.top; iResult = IndexOfMonitor(pMIA, pt); if (iResult < 0) { pt.x = rc.left; pt.y = rc.bottom; iResult = IndexOfMonitor(pMIA, pt); if (iResult < 0) { pt.x = rc.right; pt.y = rc.top; iResult = IndexOfMonitor(pMIA, pt); if (iResult < 0) { pt.x = rc.right; pt.y = rc.bottom; iResult = IndexOfMonitor(pMIA, pt); } } } return(iResult); } int IndexOfMonitor (tMonitorInfoArrayPtr pMIA, COMPPOS& componentPosition) { RECT rcComponent; TBOOL(SetRect(&rcComponent, componentPosition.iLeft, componentPosition.iTop, componentPosition.iLeft + componentPosition.dwWidth, componentPosition.iTop + componentPosition.dwHeight)); return(IndexOfMonitor(pMIA, rcComponent)); } BOOL RepositionDesktopRect (RECT& rcComponent, tMonitorInfoArrayPtr oldMonitorArray, tMonitorInfoArrayPtr newMonitorArray) // Reposition the component's RECT based on the logic at the // top of the source file. Used for both the component's // current position and the restored position. { BOOL bRepositionedComponent; int iOldMonitorIndex, iNewMonitorIndex; // This is for future expansion. The components are always // deemed to be repositioned if this function is called. bRepositionedComponent = TRUE; // Find out if the monitor which the component was on is still // present. To do this find the index of the component in the // old monitor array, get the HMONITOR and find that in the new // monitor array. iOldMonitorIndex = IndexOfMonitor(oldMonitorArray, rcComponent); if (iOldMonitorIndex >= 0) { RECT *prcOldMonitor, *prcNewMonitor; iNewMonitorIndex = IndexOfMonitor(newMonitorArray, oldMonitorArray->miaMonitors[iOldMonitorIndex].miHMONITOR); if (iNewMonitorIndex < 0) { HMONITOR hMonitor; // The component is on a monitor that no longer exists. The only // thing to do in this case is to find the nearest monitor based // on the GDI co-ordinates and position it on that monitor. hMonitor = MonitorFromRect(&rcComponent, MONITOR_DEFAULTTONEAREST); iNewMonitorIndex = IndexOfMonitor(newMonitorArray, hMonitor); ASSERT(iNewMonitorIndex >= 0); } // If iNewMonitorIndex was already positive then the monitor which // the component was on still exists and simply mapping GDI // co-ordinates will work. Otherwise we found the nearest monitor // and mapping GDI co-ordinates also works! // This maps from the component's OLD co-ordinates in trident // co-ordinates to GDI co-ordinates. Then it maps from the GDI // co-ordinates to an OLD monitor relative co-ordinate. Then it // maps from the OLD monitor relative co-ordinates to the NEW // monitor GDI co-ordinates. prcOldMonitor = &oldMonitorArray->miaMonitors[iOldMonitorIndex].miDisplayAreaRect; prcNewMonitor = &newMonitorArray->miaMonitors[iNewMonitorIndex].miDisplayAreaRect; TBOOL(OffsetRect(&rcComponent, +oldMonitorArray->miaVirtualScreen.left, +oldMonitorArray->miaVirtualScreen.top)); TBOOL(OffsetRect(&rcComponent, -prcOldMonitor->left, -prcOldMonitor->top)); TBOOL(OffsetRect(&rcComponent, +prcNewMonitor->left, +prcNewMonitor->top)); } else { // Component exists at an invalid location in the old monitor // layout. It may be valid in the new layout. Try this. If that // doesn't work then it doesn't exist in the old nor the new // layout. It was in no-man's land. Position it using the default // positioning system. iNewMonitorIndex = IndexOfMonitor(newMonitorArray, rcComponent); if (iNewMonitorIndex < 0) { POINT ptOrigin; COMPPOS componentPosition; GetNextComponentPosition(&componentPosition); IncrementComponentsPositioned(); TBOOL(SetRect(&rcComponent, componentPosition.iLeft, componentPosition.iTop, componentPosition.iLeft + componentPosition.dwWidth, componentPosition.iTop + componentPosition.dwHeight)); // Get the primary monitor index in our monitor rectangle array. SetPt(ptOrigin, 0, 0); iNewMonitorIndex = IndexOfMonitor(newMonitorArray, MonitorFromPoint(ptOrigin, MONITOR_DEFAULTTOPRIMARY)); ASSERT(iNewMonitorIndex >= 0); } } // At this stage the component position is in GDI co-ordinates. // Convert from GDI co-ordinates back to trident co-ordinates. TBOOL(OffsetRect(&rcComponent, -newMonitorArray->miaVirtualScreen.left, -newMonitorArray->miaVirtualScreen.top)); return(bRepositionedComponent); } BOOL RepositionDesktopComponent (COMPPOS& componentPosition, COMPSTATEINFO& componentStateInfo, DWORD dwItemState, int iComponentType) { BOOL bRepositionedComponent; tMonitorInfoArrayPtr oldMonitorArray, newMonitorArray; RECT rcComponent; // Check if the monitor layout has changed. If unchanged then // there is no need to move the components. oldMonitorArray = gOldMonitorArray; newMonitorArray = gNewMonitorArray; if (oldMonitorArray == NULL) { oldMonitorArray = newMonitorArray; } TBOOL(SetRect(&rcComponent, componentPosition.iLeft, componentPosition.iTop, componentPosition.iLeft + componentPosition.dwWidth, componentPosition.iTop + componentPosition.dwHeight)); bRepositionedComponent = RepositionDesktopRect(rcComponent, oldMonitorArray, newMonitorArray); componentPosition.iLeft = rcComponent.left; componentPosition.iTop = rcComponent.top; componentPosition.dwWidth = rcComponent.right - rcComponent.left; componentPosition.dwHeight = rcComponent.bottom - rcComponent.top; ValidateComponentPosition(&componentPosition, dwItemState, iComponentType, NULL, NULL); // If the component is zoomed also reposition the restored // COMPSTATEINFO. if (IsZoomedState(dwItemState)) { COMPPOS restoredCompPos; TBOOL(SetRect(&rcComponent, componentStateInfo.iLeft, componentStateInfo.iTop, componentStateInfo.iLeft + componentStateInfo.dwWidth, componentStateInfo.iTop + componentStateInfo.dwHeight)); bRepositionedComponent = RepositionDesktopRect(rcComponent, oldMonitorArray, newMonitorArray) || bRepositionedComponent; restoredCompPos.iLeft = componentStateInfo.iLeft = rcComponent.left; restoredCompPos.iTop = componentStateInfo.iTop = rcComponent.top; restoredCompPos.dwWidth = componentStateInfo.dwWidth = rcComponent.right - rcComponent.left; restoredCompPos.dwHeight = componentStateInfo.dwHeight = rcComponent.bottom - rcComponent.top; ZoomComponent(&componentPosition, dwItemState, FALSE); restoredCompPos.dwSize = sizeof(restoredCompPos); ValidateComponentPosition(&restoredCompPos, IS_NORMAL, iComponentType, NULL, NULL); } return(bRepositionedComponent); } BOOL ReadAllComponents (HKEY hKeyDesktop, tComponentInfoPtr& pComponentInfo, DWORD& dwComponentCount) { tComponentInfoPtr pCI; if (RegQueryInfoKey(hKeyDesktop, NULL, NULL, NULL, &dwComponentCount, NULL, NULL, NULL, NULL, NULL, NULL, NULL) != ERROR_SUCCESS) dwComponentCount = 0; if (dwComponentCount > 0) { // 99/08/09 #383184: STRESS fix. Allocate the whole block of // memory required for the components but allocate one extra // entry. advapi32!RegEnumKeyEx will try to access the memory // before determining that there is a failure condition. With // pageheap on (and the block allocated at the end of the page) // this causes an access violation. The simplest fix is to add // an extra entry. pComponentInfo = pCI = reinterpret_cast(LocalAlloc(LPTR, (dwComponentCount + 1) * sizeof(*pCI))); // LMEM_FIXED | LMEM_ZEROINIT if (pCI != NULL) { DWORD dwIndex, dwSize; // Enumerate all the desktop components. dwIndex = 0; dwSize = sizeof(pCI->ciName); while (RegEnumKeyEx(hKeyDesktop, dwIndex, pCI->ciName, &dwSize, NULL, NULL, NULL, NULL) == ERROR_SUCCESS) { CRegKey regKeyComponent; if (regKeyComponent.Open(hKeyDesktop, pCI->ciName, KEY_READ | KEY_WRITE) == ERROR_SUCCESS) { DWORD dwType, cbData; // Read the Position value. cbData = sizeof(pCI->ciPosition); if (SHQueryValueEx(regKeyComponent, REG_VAL_COMP_POSITION, NULL, &dwType, &pCI->ciPosition, &cbData) == ERROR_SUCCESS) { DWORD dwFlags; pCI->ciValidData = TRUE; if (SHQueryValueEx(regKeyComponent, REG_VAL_COMP_FLAGS, NULL, &dwType, &dwFlags, &cbData) == ERROR_SUCCESS) { pCI->ciVisible = ((dwFlags & COMP_SELECTED) != 0); pCI->ciType = (dwFlags & COMP_TYPE_MASK); } else { pCI->ciVisible = FALSE; pCI->ciType = COMP_TYPE_WEBSITE; } pCI->ciItemState = IS_NORMAL; // if missing (IE4 machine) or error the assume normal cbData = sizeof(pCI->ciItemState); if ((SHQueryValueEx(regKeyComponent, REG_VAL_COMP_CURSTATE, NULL, &dwType, &pCI->ciItemState, &cbData) == ERROR_SUCCESS)) { // If the component is zoomed also read in the COMPSTATEINFO. if (IsZoomedState(pCI->ciItemState)) { cbData = sizeof(pCI->ciStateInfo); TW32(SHQueryValueEx(regKeyComponent, REG_VAL_COMP_RESTOREDSTATEINFO, NULL, &dwType, &pCI->ciStateInfo, &cbData)); } } } } ++pCI; ++dwIndex; dwSize = sizeof(pCI->ciName); } } } return((dwComponentCount != 0) && (pComponentInfo != NULL)); } int IndexOfComponent (tComponentInfoPtr pComponentInfo, DWORD dwComponentCount, LPCTSTR pcszName) { int iResult, i; for (iResult = -1, i = 0; (iResult < 0) && (i < static_cast(dwComponentCount)); ++i) { if (lstrcmp(pComponentInfo[i].ciName, pcszName) == 0) iResult = i; } return(iResult); } void WriteAllComponents (HKEY hKeyDesktop, tComponentInfoPtr pComponentInfo, DWORD dwComponentCount) { TCHAR szSubKeyName[kNameSize]; DWORD dwSubKeyIndex, dwSubKeySize; // Enumerate all the desktop components. dwSubKeyIndex = 0; dwSubKeySize = ARRAYSIZE(szSubKeyName); while (RegEnumKeyEx(hKeyDesktop, dwSubKeyIndex, szSubKeyName, &dwSubKeySize, NULL, NULL, NULL, NULL) == ERROR_SUCCESS) { CRegKey regKeyComponent; if (regKeyComponent.Open(hKeyDesktop, szSubKeyName, KEY_READ | KEY_WRITE) == ERROR_SUCCESS) { int i; i = IndexOfComponent(pComponentInfo, dwComponentCount, szSubKeyName); if ((i >= 0) && pComponentInfo[i].ciRepositioned) { TW32(RegSetValueEx(regKeyComponent, REG_VAL_COMP_POSITION, 0, REG_BINARY, reinterpret_cast(&pComponentInfo[i].ciPosition), sizeof(pComponentInfo[i].ciPosition))); TW32(RegSetValueEx(regKeyComponent, REG_VAL_COMP_CURSTATE, NULL, REG_BINARY, reinterpret_cast(&pComponentInfo[i].ciItemState), sizeof(pComponentInfo[i].ciItemState))); // If the component is zoomed also write out the COMPSTATEINFO. if (IsZoomedState(pComponentInfo[i].ciItemState)) { TW32(RegSetValueEx(regKeyComponent, REG_VAL_COMP_RESTOREDSTATEINFO, 0, REG_BINARY, reinterpret_cast(&pComponentInfo[i].ciStateInfo), sizeof(pComponentInfo[i].ciStateInfo))); } } } ++dwSubKeyIndex; dwSubKeySize = ARRAYSIZE(szSubKeyName); } } BOOL AdjustDesktopComponents (LPCRECT arectNew, int crectNew, LPCRECT arectOldMonitors, LPCRECT arectOld, int crectOld) { static const int kMaximumMonitorCount = 16; HRESULT hr; BOOL bRepositionedComponent; int zoomedComponentIndices[kMaximumMonitorCount]; // 16 monitors limitation here - make dynamic if required int i; tMonitorInfoArrayPtr oldMonitorArray; CRegKey regKeyDesktop; TCHAR szDeskcomp[MAX_PATH]; for (i = 0; i < kMaximumMonitorCount; ++i) zoomedComponentIndices[i] = -1; bRepositionedComponent = FALSE; hr = CalculateCurrentMonitorArray(); if (SUCCEEDED(hr)) { oldMonitorArray = gOldMonitorArray; if (oldMonitorArray == NULL) oldMonitorArray = gNewMonitorArray; GetRegLocation(szDeskcomp, ARRAYSIZE(szDeskcomp), REG_DESKCOMP_COMPONENTS, NULL); if (ERROR_SUCCESS == regKeyDesktop.Open(HKEY_CURRENT_USER, szDeskcomp, KEY_READ)) { DWORD dwComponentCount; tComponentInfoPtr pComponentInfo; // Enumerate all the desktop components. if (ReadAllComponents(regKeyDesktop, pComponentInfo, dwComponentCount)) { tComponentInfoPtr pCI; for (pCI = pComponentInfo, i = 0; i < static_cast(dwComponentCount); ++pCI, ++i) { int iPreviousMonitorIndexOfComponent; // Calculate the previous monitor position BEFORE the component // gets repositioned. iPreviousMonitorIndexOfComponent = IndexOfMonitor(oldMonitorArray, pCI->ciPosition); if (RepositionDesktopComponent(pCI->ciPosition, pCI->ciStateInfo, pCI->ciItemState, pCI->ciType)) { int iCurrentMonitorIndexOfComponent; pCI->ciRepositioned = bRepositionedComponent = TRUE; iCurrentMonitorIndexOfComponent = IndexOfMonitor(gNewMonitorArray, pCI->ciPosition); if (iCurrentMonitorIndexOfComponent >= 0) { // 99/05/12 #338446 vtan: Only use a zero or positive index into the // monitor array. -1 is invalid and will cause an AV. This should NEVER // happen but rather than assert this condition is handled. if (IsZoomedState(pCI->ciItemState) && (zoomedComponentIndices[iCurrentMonitorIndexOfComponent] >= 0)) { tComponentInfoPtr pCIToRestore; // This component is zoomed on a monitor that already has a zoomed // component. Compare this component and the component already on the // monitor. The one that was there before is the one that stays. The one // that shouldn't be there is the one that gets restored. if ((iPreviousMonitorIndexOfComponent == iCurrentMonitorIndexOfComponent) && pCI->ciVisible) pCIToRestore = pComponentInfo + zoomedComponentIndices[iCurrentMonitorIndexOfComponent]; else pCIToRestore = pCI; pCIToRestore->ciPosition.iLeft = pCIToRestore->ciStateInfo.iLeft; pCIToRestore->ciPosition.iTop = pCIToRestore->ciStateInfo.iTop; pCIToRestore->ciPosition.dwWidth = pCIToRestore->ciStateInfo.dwWidth; pCIToRestore->ciPosition.dwHeight = pCIToRestore->ciStateInfo.dwHeight; pCIToRestore->ciPosition.izIndex = COMPONENT_TOP; pCIToRestore->ciItemState = IS_NORMAL; } // If the component is zoomed also write out the COMPSTATEINFO. if (IsZoomedState(pCI->ciItemState)) { zoomedComponentIndices[iCurrentMonitorIndexOfComponent] = i; } } } } WriteAllComponents(regKeyDesktop, pComponentInfo, dwComponentCount); LocalFree(pComponentInfo); } if (bRepositionedComponent) { SHELLSTATE ss; SetDesktopFlags(COMPONENTS_DIRTY, COMPONENTS_DIRTY); SHGetSetSettings(&ss, SSF_DESKTOPHTML, FALSE); // Refresh only if AD is turned on. if(ss.fDesktopHTML) { // 98/09/22 #182982 vtan: Use dynamic HTML by default to refresh. // Only disallow usage when specifically told to by a flag. PokeWebViewDesktop(AD_APPLY_FORCE | AD_APPLY_HTMLGEN | AD_APPLY_REFRESH); } } } ApplyCurrentMonitorArray(); } return bRepositionedComponent; }