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1165 lines
30 KiB
1165 lines
30 KiB
//-------------------------------------------------------------------
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//
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// File: SelRange.cpp
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//
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// Contents:
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// This file contians Selection Range handling code.
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//
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//-------------------------------------------------------------------
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#include "ctlspriv.h"
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#include "selrange.h"
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#include "stdio.h"
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#include <shguidp.h>
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#define MINCOUNT 6 // number of sel ranges to start with amd maintain
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#define GROWSIZE 150 // percent to grow when needed
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#define COUNT_SELRANGES_NONE 2 // When count of selranges really means none
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typedef struct tag_SELRANGEITEM
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{
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LONG iBegin;
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LONG iEnd;
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} SELRANGEITEM, *PSELRANGEITEM;
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class CLVRange : public ILVRange
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{
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public:
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// *** IUnknown methods ***
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STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppv);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// *** ILVRange methods ***
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STDMETHODIMP IncludeRange(LONG iBegin, LONG iEnd);
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STDMETHODIMP ExcludeRange(LONG iBegin, LONG iEnd);
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STDMETHODIMP InvertRange(LONG iBegin, LONG iEnd);
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STDMETHODIMP InsertItem(LONG iItem);
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STDMETHODIMP RemoveItem(LONG iItem);
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STDMETHODIMP Clear();
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STDMETHODIMP IsSelected(LONG iItem);
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STDMETHODIMP IsEmpty();
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STDMETHODIMP NextSelected(LONG iItem, LONG *piItem);
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STDMETHODIMP NextUnSelected(LONG iItem, LONG *piItem);
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STDMETHODIMP CountIncluded(LONG *pcIncluded);
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protected:
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// Helper Functions.
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friend ILVRange *LVRange_Create();
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CLVRange();
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~CLVRange();
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BOOL _Enlarge();
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BOOL _Shrink();
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BOOL _InsertRange(LONG iAfterItem, LONG iBegin, LONG iEnd);
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HRESULT _RemoveRanges(LONG iStartItem, LONG iStopItem, LONG *p);
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BOOL _FindValue(LONG Value, LONG* piItem);
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void _InitNew();
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int _cRef;
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PSELRANGEITEM _VSelRanges; // Vector of sel ranges
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LONG _cSize; // size of above vector in sel ranges
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LONG _cSelRanges; // count of sel ranges used
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LONG _cIncluded; // Count of Included items...
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};
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//-------------------------------------------------------------------
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//
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// Function: _Enlarge
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//
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// Summary:
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// This will enlarge the number of items the Sel Range can have.
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//
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// Arguments:
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// PSELRANGE [in] - SelRange to Enlarge
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//
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// Return: FALSE if failed.
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//
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// Notes: Though this function may fail, pselrange structure is still valid
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//
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// History:
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// 17-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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BOOL CLVRange::_Enlarge()
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{
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LONG cNewSize;
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PSELRANGEITEM pTempSelRange;
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BOOL frt = FALSE;
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cNewSize = _cSize * GROWSIZE / 100;
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pTempSelRange = (PSELRANGEITEM) GlobalReAlloc( (HGLOBAL)_VSelRanges,
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cNewSize * sizeof( SELRANGEITEM ),
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GMEM_ZEROINIT | GMEM_MOVEABLE );
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if (NULL != pTempSelRange)
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{
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_VSelRanges = pTempSelRange;
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_cSize = cNewSize;
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frt = TRUE;
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}
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return( frt );
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}
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//-------------------------------------------------------------------
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//
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// Function: _Shrink
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//
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// Summary:
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// This will reduce the number of items the Sel Range can have.
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//
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// Arguments:
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//
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// Return: FALSE if failed
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//
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// Notes: Shrink only happens when a significant size below the next size
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// is obtained and the new size is at least the minimum size.
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// Though this function may fail, pselrange structure is still valid
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//
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// History:
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// 17-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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BOOL CLVRange::_Shrink()
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{
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LONG cNewSize;
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LONG cTriggerSize;
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PSELRANGEITEM pTempSelRange;
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BOOL frt = TRUE;
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// check if we are below last grow area by a small percent
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cTriggerSize = _cSize * 90 / GROWSIZE;
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cNewSize = _cSize * 100 / GROWSIZE;
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if ((_cSelRanges < cTriggerSize) && (cNewSize >= MINCOUNT))
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{
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pTempSelRange = (PSELRANGEITEM) GlobalReAlloc( (HGLOBAL)_VSelRanges,
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cNewSize * sizeof( SELRANGEITEM ),
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GMEM_ZEROINIT | GMEM_MOVEABLE );
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if (NULL != pTempSelRange)
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{
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_VSelRanges = pTempSelRange;
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_cSize = cNewSize;
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}
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else
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{
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frt = FALSE;
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}
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}
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return( frt );
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}
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//-------------------------------------------------------------------
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//
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// Function: _InsertRange
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//
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// Summary:
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// inserts a single range item into the range vector
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//
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// Arguments:
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// iAfterItem [in] - Index to insert range after, -1 means insert as first item
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// iBegin [in] - begin of range
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// iEnd [in] - end of the range
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//
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// Return:
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// TRUE if succesful, otherwise FALSE
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//
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// Notes:
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//
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// History:
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// 17-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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BOOL CLVRange::_InsertRange(LONG iAfterItem,
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LONG iBegin,
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LONG iEnd )
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{
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LONG iItem;
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BOOL frt = TRUE;
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ASSERT( iAfterItem >= -1 );
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ASSERT( iBegin >= SELRANGE_MINVALUE );
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ASSERT( iEnd >= iBegin );
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ASSERT( iEnd <= SELRANGE_MAXVALUE );
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ASSERT( _cSelRanges < _cSize );
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// shift all over one
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for (iItem = _cSelRanges; iItem > iAfterItem + 1; iItem--)
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{
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_VSelRanges[iItem] = _VSelRanges[iItem-1];
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}
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_cSelRanges++;
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// make the insertion
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_VSelRanges[iAfterItem+1].iBegin = iBegin;
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_VSelRanges[iAfterItem+1].iEnd = iEnd;
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// make sure we have room next time
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if (_cSelRanges == _cSize)
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{
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frt = _Enlarge();
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}
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return( frt );
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}
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//-------------------------------------------------------------------
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//
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// Function: _RemoveRanges
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//
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// Summary:
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// Removes all ranged between and including the speicifed indexes
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//
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// Arguments:
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// iStartItem [in] - Index to start removal
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// iStopItem [in] - Index to stop removal
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//
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// Return:
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// SELRANGE_ERROR on memory allocation error
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// The number of items that are unselected by this removal
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//
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// Notes:
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//
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// History:
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// 17-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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HRESULT CLVRange::_RemoveRanges(LONG iStartItem, LONG iStopItem, LONG *pc )
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{
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LONG iItem;
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LONG diff;
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LONG cUnSelected = 0;
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HRESULT hres = S_OK;
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ASSERT( iStartItem > 0 );
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ASSERT( iStopItem >= iStartItem );
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ASSERT( iStartItem < _cSelRanges - 1 );
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ASSERT( iStopItem < _cSelRanges - 1 );
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diff = iStopItem - iStartItem + 1;
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for (iItem = iStartItem; iItem <= iStopItem; iItem++)
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cUnSelected += _VSelRanges[iItem].iEnd -
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_VSelRanges[iItem].iBegin + 1;
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// shift all over the difference
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for (iItem = iStopItem+1; iItem < _cSelRanges; iItem++, iStartItem++)
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_VSelRanges[iStartItem] = _VSelRanges[iItem];
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_cSelRanges -= diff;
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if (!_Shrink())
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{
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hres = E_FAIL;
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}
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else if (pc)
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*pc = cUnSelected;
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return( hres );
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}
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//-------------------------------------------------------------------
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//
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// Function: SelRange_FindValue
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//
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// Summary:
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// This function will search the ranges for the value, returning true
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// if the value was found within a range. The piItem will contain the
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// the index at which it was found or the index before where it should be
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// The piItem may be set to -1, meaning that there are no ranges in the list
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// This functions uses a non-recursive binary search algorithm.
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//
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// Arguments:
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// piItem [out] - Return of found range index, or one before
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// Value [in] - Value to find within a range
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//
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// Return: True if found, False if not found
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//
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// Notes: The piItem will return one before if return is false.
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//
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// History:
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// 14-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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BOOL CLVRange::_FindValue(LONG Value, LONG* piItem )
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{
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LONG First;
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LONG Last;
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LONG Item;
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BOOL fFound = FALSE;
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ASSERT( piItem );
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ASSERT( _cSize >= COUNT_SELRANGES_NONE );
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ASSERT( Value >= SELRANGE_MINVALUE );
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ASSERT( Value <= SELRANGE_MAXVALUE );
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First = 0;
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Last = _cSelRanges - 1;
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Item = Last / 2;
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do
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{
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if (_VSelRanges[Item].iBegin > Value)
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{ // Value before this Item
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Last = Item;
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Item = (Last - First) / 2 + First;
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if (Item == Last)
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{
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Item = First;
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break;
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}
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}
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else if (_VSelRanges[Item].iEnd < Value)
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{ // Value after this Item
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First = Item;
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Item = (Last - First) / 2 + First;
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if (Item == First)
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{
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break;
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}
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}
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else
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{ // Value at this Item
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fFound = TRUE;
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}
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} while (!fFound);
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*piItem = Item;
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return( fFound );
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}
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//-------------------------------------------------------------------
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//
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// Function: _InitNew
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//
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// Summary:
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// This function will initialize a SelRange object.
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//
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// Arguments:
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//
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// Return:
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//
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// Notes:
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//
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// History:
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// 18-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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void CLVRange::_InitNew()
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{
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_cSize = MINCOUNT;
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_cSelRanges = COUNT_SELRANGES_NONE;
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_VSelRanges[0].iBegin = LONG_MIN;
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// -2 and +2 below are to stop consecutive joining of end markers
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_VSelRanges[0].iEnd = SELRANGE_MINVALUE - 2;
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_VSelRanges[1].iBegin = SELRANGE_MAXVALUE + 2;
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_VSelRanges[1].iEnd = SELRANGE_MAXVALUE + 2;
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_cIncluded = 0;
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}
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//-------------------------------------------------------------------
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//
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// Function: SelRange_Create
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//
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// Summary:
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// This function will create and initialize a SelRange object.
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//
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// Arguments:
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//
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// Return: HSELRANGE that is created or NULL if it failed.
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//
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// Notes:
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//
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// History:
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// 14-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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ILVRange *LVRange_Create( )
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{
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CLVRange *pselrange = new CLVRange;
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if (NULL != pselrange)
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{
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pselrange->_VSelRanges = (PSELRANGEITEM) GlobalAlloc( GPTR,
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sizeof( SELRANGEITEM ) * MINCOUNT );
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if (NULL != pselrange->_VSelRanges)
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{
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pselrange->_InitNew();
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}
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else
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{
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delete pselrange;
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pselrange = NULL;
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}
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}
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return( pselrange? SAFECAST(pselrange, ILVRange*) : NULL);
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}
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//-------------------------------------------------------------------
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//
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// Function: Constructor
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//
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//-------------------------------------------------------------------
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CLVRange::CLVRange()
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{
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_cRef = 1;
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}
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//-------------------------------------------------------------------
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//
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// Function: Destructor
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//
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//-------------------------------------------------------------------
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CLVRange::~CLVRange()
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{
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GlobalFree( _VSelRanges );
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}
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//-------------------------------------------------------------------
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//
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// Function: QueryInterface
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//
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//-------------------------------------------------------------------
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HRESULT CLVRange::QueryInterface(REFIID iid, void **ppv)
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{
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if (IsEqualIID(iid, IID_ILVRange) || IsEqualIID(iid, IID_IUnknown))
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{
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*ppv = SAFECAST(this, ILVRange *);
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}
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else
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{
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*ppv = NULL;
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return E_NOINTERFACE;
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}
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_cRef++;
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return NOERROR;
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}
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//-------------------------------------------------------------------
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//
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// Function: AddRef
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//
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//-------------------------------------------------------------------
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ULONG CLVRange::AddRef()
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{
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return ++_cRef;
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}
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//-------------------------------------------------------------------
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//
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// Function: Release
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//
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//-------------------------------------------------------------------
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ULONG CLVRange::Release()
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{
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if (--_cRef)
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return _cRef;
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delete this;
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return 0;
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}
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//-------------------------------------------------------------------
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//
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// Function: IncludeRange
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//
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// Summary:
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// This function will include the range defined into the current
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// ranges, compacting as needed.
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//
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// Arguments:
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// hselrange [in] - Handle to the SelRange
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// iBegin [in] - Begin of new range
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// iEnd [in] - End of new range
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//
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// Notes:
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//
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// History:
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// 14-Oct-94 MikeMi Created
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//
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//-------------------------------------------------------------------
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HRESULT CLVRange::IncludeRange(LONG iBegin, LONG iEnd )
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{
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LONG iFirst; // index before or contains iBegin value
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LONG iLast; // index before or contains iEnd value
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BOOL fExtendFirst; // do we extend the iFirst or create one after it
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LONG iRemoveStart; // start of ranges that need to be removed
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LONG iRemoveFinish; // end of ranges that need to be removed
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LONG iNewEnd; // calculate new end value as we go
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BOOL fEndFound; // was the iEnd found in a range already
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BOOL fBeginFound; // was the iEnd found in a range already
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LONG cSelected = 0;
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HRESULT hres = S_OK;
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ASSERT( iEnd >= iBegin );
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ASSERT( iBegin >= SELRANGE_MINVALUE );
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ASSERT( iEnd <= SELRANGE_MAXVALUE );
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// find approximate locations
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fBeginFound = _FindValue( iBegin, &iFirst );
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fEndFound = _FindValue( iEnd, &iLast );
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//
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// Find First values
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//
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// check for consecutive End-First values
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if ((_VSelRanges[iFirst].iEnd == iBegin - 1) ||
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(fBeginFound))
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{
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// extend iFirst
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fExtendFirst = TRUE;
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iRemoveStart = iFirst + 1;
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}
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else
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{
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// create one after the iFirst
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fExtendFirst = FALSE;
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iRemoveStart = iFirst + 2;
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}
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//
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// Find Last values
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//
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if (fEndFound)
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{
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// Use [iLast].iEnd value
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iRemoveFinish = iLast;
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iNewEnd = _VSelRanges[iLast].iEnd;
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}
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else
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{
|
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// check for consecutive First-End values
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if (_VSelRanges[iLast + 1].iBegin == iEnd + 1)
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{
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// Use [iLast + 1].iEnd value
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iNewEnd = _VSelRanges[iLast+1].iEnd;
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iRemoveFinish = iLast + 1;
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}
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else
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{
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// Use iEnd value
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iRemoveFinish = iLast;
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iNewEnd = iEnd;
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}
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}
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//
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// remove condenced items if needed
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//
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if (iRemoveStart <= iRemoveFinish)
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{
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LONG cChange;
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hres = _RemoveRanges(iRemoveStart, iRemoveFinish, &cChange );
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if (FAILED(hres))
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return hres;
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else
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{
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cSelected -= cChange;
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}
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}
|
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|
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//
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// insert item and reset values as needed
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//
|
|
if (fExtendFirst)
|
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{
|
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cSelected += iNewEnd - _VSelRanges[iFirst].iEnd;
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_VSelRanges[iFirst].iEnd = iNewEnd;
|
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}
|
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else
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{
|
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if (iRemoveStart > iRemoveFinish + 1)
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{
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cSelected += iEnd - iBegin + 1;
|
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// create one
|
|
if (!_InsertRange(iFirst, iBegin, iNewEnd ))
|
|
{
|
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hres = E_FAIL;
|
|
}
|
|
}
|
|
else
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{
|
|
cSelected += iNewEnd - _VSelRanges[iFirst+1].iEnd;
|
|
cSelected += _VSelRanges[iFirst+1].iBegin - iBegin;
|
|
// no need to create one since the Removal would have left us one
|
|
_VSelRanges[iFirst+1].iEnd = iNewEnd;
|
|
_VSelRanges[iFirst+1].iBegin = iBegin;
|
|
}
|
|
}
|
|
|
|
_cIncluded += cSelected;
|
|
return( hres );
|
|
}
|
|
|
|
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_ExcludeRange
|
|
//
|
|
// Summary:
|
|
// This function will exclude the range defined from the current
|
|
// ranges, compacting and enlarging as needed.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - Handle to the SelRange
|
|
// iBegin [in] - Begin of range to remove
|
|
// iEnd [in] - End of range to remove
|
|
//
|
|
// Return:
|
|
// SELRANGE_ERROR if memory allocation error
|
|
// the number actual items that changed state
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 17-Oct-94 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::ExcludeRange( LONG iBegin, LONG iEnd )
|
|
{
|
|
LONG iFirst; // index before or contains iBegin value
|
|
LONG iLast; // index before or contains iEnd value
|
|
LONG iRemoveStart; // start of ranges that need to be removed
|
|
LONG iRemoveFinish; // end of ranges that need to be removed
|
|
|
|
LONG iFirstNewEnd; // calculate new end value as we go
|
|
BOOL fBeginFound; // was the iBegin found in a range already
|
|
BOOL fEndFound; // was the iEnd found in a range already
|
|
LONG cUnSelected = 0;
|
|
HRESULT hres = S_OK;
|
|
|
|
ASSERT( iEnd >= iBegin );
|
|
ASSERT( iBegin >= SELRANGE_MINVALUE );
|
|
ASSERT( iEnd <= SELRANGE_MAXVALUE );
|
|
|
|
// find approximate locations
|
|
fBeginFound = _FindValue( iBegin, &iFirst );
|
|
fEndFound = _FindValue( iEnd, &iLast );
|
|
|
|
//
|
|
// Find First values
|
|
//
|
|
|
|
// start removal after first
|
|
iRemoveStart = iFirst + 1;
|
|
// save FirstEnd as we may need to modify it
|
|
iFirstNewEnd = _VSelRanges[iFirst].iEnd;
|
|
|
|
if (fBeginFound)
|
|
{
|
|
// check for complete removal of first
|
|
// (first is a single selection or match?)
|
|
if (_VSelRanges[iFirst].iBegin == iBegin)
|
|
{
|
|
iRemoveStart = iFirst;
|
|
}
|
|
else
|
|
{
|
|
// otherwise truncate iFirst
|
|
iFirstNewEnd = iBegin - 1;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Find Last values
|
|
//
|
|
|
|
// end removal on last
|
|
iRemoveFinish = iLast;
|
|
|
|
if (fEndFound)
|
|
{
|
|
// check for complete removal of last
|
|
// (first/last is a single selection or match?)
|
|
if (_VSelRanges[iLast].iEnd != iEnd)
|
|
{
|
|
if (iFirst == iLast)
|
|
{
|
|
// split
|
|
if (!_InsertRange(iFirst, iEnd + 1, _VSelRanges[iFirst].iEnd ))
|
|
{
|
|
return( E_FAIL );
|
|
}
|
|
cUnSelected -= _VSelRanges[iFirst].iEnd - iEnd;
|
|
}
|
|
else
|
|
{
|
|
// truncate Last
|
|
iRemoveFinish = iLast - 1;
|
|
cUnSelected += (iEnd + 1) - _VSelRanges[iLast].iBegin;
|
|
_VSelRanges[iLast].iBegin = iEnd + 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now set the new end, since Last code may have needed the original values
|
|
cUnSelected -= iFirstNewEnd - _VSelRanges[iFirst].iEnd;
|
|
_VSelRanges[iFirst].iEnd = iFirstNewEnd;
|
|
|
|
|
|
//
|
|
// remove items if needed
|
|
//
|
|
if (iRemoveStart <= iRemoveFinish)
|
|
{
|
|
LONG cChange;
|
|
|
|
if (SUCCEEDED(hres = _RemoveRanges(iRemoveStart, iRemoveFinish, &cChange )))
|
|
cUnSelected += cChange;
|
|
}
|
|
|
|
_cIncluded -= cUnSelected;
|
|
return( hres );
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_Clear
|
|
//
|
|
// Summary:
|
|
// This function will remove all ranges within the SelRange object.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to clear
|
|
//
|
|
// Return: FALSE if failed.
|
|
//
|
|
// Notes:
|
|
// This function may return FALSE on memory allocation problems, but
|
|
// will leave the SelRange object in the last state before this call.
|
|
//
|
|
// History:
|
|
// 14-Oct-94 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::Clear()
|
|
{
|
|
PSELRANGEITEM pNewItems;
|
|
HRESULT hres = S_OK;
|
|
|
|
pNewItems = (PSELRANGEITEM) GlobalAlloc( GPTR,
|
|
sizeof( SELRANGEITEM ) * MINCOUNT );
|
|
if (NULL != pNewItems)
|
|
{
|
|
GlobalFree( _VSelRanges );
|
|
_VSelRanges = pNewItems;
|
|
|
|
_InitNew();
|
|
}
|
|
else
|
|
{
|
|
hres = E_FAIL;
|
|
}
|
|
return( hres );
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_IsSelected
|
|
//
|
|
// Summary:
|
|
// This function will return if the value iItem is within a
|
|
// selected range.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
// iItem [in] - value to check for
|
|
//
|
|
// Return: TRUE if selected, FALSE if not.
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 17-Oct-94 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::IsSelected( LONG iItem )
|
|
{
|
|
LONG iFirst;
|
|
|
|
ASSERT( iItem >= 0 );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
return( _FindValue( iItem, &iFirst ) ? S_OK : S_FALSE);
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_IsEmpty
|
|
//
|
|
// Summary:
|
|
// This function will return TRUE if the range is empty
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
//
|
|
// Return: TRUE if empty
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
//
|
|
//-------------------------------------------------------------------
|
|
HRESULT CLVRange::IsEmpty()
|
|
{
|
|
return (_cSelRanges == COUNT_SELRANGES_NONE)? S_OK : S_FALSE;
|
|
}
|
|
|
|
HRESULT CLVRange::CountIncluded(LONG *pcIncluded)
|
|
{
|
|
*pcIncluded = _cIncluded;
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_InsertItem
|
|
//
|
|
// Summary:
|
|
// This function will insert a unselected item at the location,
|
|
// which will push all selections up one index.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
// iItem [in] - value to check for
|
|
//
|
|
// Return:
|
|
// False on memory allocation error
|
|
// otherwise TRUE
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 20-Dec-94 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::InsertItem( LONG iItem )
|
|
{
|
|
LONG iFirst;
|
|
LONG i;
|
|
LONG iBegin;
|
|
LONG iEnd;
|
|
|
|
ASSERT( iItem >= 0 );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
if (_FindValue( iItem, &iFirst ) )
|
|
{
|
|
// split it
|
|
if ( _VSelRanges[iFirst].iBegin == iItem )
|
|
{
|
|
// but don't split if starts with value
|
|
iFirst--;
|
|
}
|
|
else
|
|
{
|
|
if (!_InsertRange(iFirst, iItem, _VSelRanges[iFirst].iEnd ))
|
|
{
|
|
return( E_FAIL );
|
|
}
|
|
_VSelRanges[iFirst].iEnd = iItem - 1;
|
|
}
|
|
}
|
|
|
|
// now walk all ranges past iFirst, incrementing all values by one
|
|
for (i = _cSelRanges-2; i > iFirst; i--)
|
|
{
|
|
iBegin = _VSelRanges[i].iBegin;
|
|
iEnd = _VSelRanges[i].iEnd;
|
|
|
|
iBegin = min( SELRANGE_MAXVALUE, iBegin + 1 );
|
|
iEnd = min( SELRANGE_MAXVALUE, iEnd + 1 );
|
|
|
|
_VSelRanges[i].iBegin = iBegin;
|
|
_VSelRanges[i].iEnd = iEnd;
|
|
}
|
|
return( S_OK );
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: SelRange_RemoveItem
|
|
//
|
|
// Summary:
|
|
// This function will remove an item at the location,
|
|
// which will pull all selections down one index.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
// iItem [in] - value to check for
|
|
// pfWasSelected [out] - was the removed item selected before the removal
|
|
//
|
|
// Return:
|
|
// TRUE if the item was removed
|
|
// FALSE if the an error happend
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 20-Dec-94 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::RemoveItem(LONG iItem )
|
|
{
|
|
LONG iFirst;
|
|
LONG i;
|
|
LONG iBegin;
|
|
LONG iEnd;
|
|
HRESULT hres = S_OK;
|
|
|
|
ASSERT( iItem >= SELRANGE_MINVALUE );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
if (_FindValue( iItem, &iFirst ) )
|
|
{
|
|
// item within, change the end value
|
|
iEnd = _VSelRanges[iFirst].iEnd;
|
|
iEnd = min( SELRANGE_MAXVALUE, iEnd - 1 );
|
|
_VSelRanges[iFirst].iEnd = iEnd;
|
|
|
|
_cIncluded--;
|
|
}
|
|
else
|
|
{
|
|
// check for merge situation
|
|
if ((iFirst < _cSelRanges - 1) &&
|
|
(_VSelRanges[iFirst].iEnd == iItem - 1) &&
|
|
(_VSelRanges[iFirst+1].iBegin == iItem + 1))
|
|
{
|
|
_VSelRanges[iFirst].iEnd =
|
|
_VSelRanges[iFirst + 1].iEnd - 1;
|
|
if (FAILED(hres = _RemoveRanges(iFirst + 1, iFirst + 1, NULL )))
|
|
return( hres );
|
|
}
|
|
}
|
|
|
|
// now walk all ranges past iFirst, decrementing all values by one
|
|
for (i = _cSelRanges-2; i > iFirst; i--)
|
|
{
|
|
iBegin = _VSelRanges[i].iBegin;
|
|
iEnd = _VSelRanges[i].iEnd;
|
|
|
|
iBegin = min( SELRANGE_MAXVALUE, iBegin - 1 );
|
|
iEnd = min( SELRANGE_MAXVALUE, iEnd - 1 );
|
|
|
|
_VSelRanges[i].iBegin = iBegin;
|
|
_VSelRanges[i].iEnd = iEnd;
|
|
}
|
|
return( hres );
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: NextSelected
|
|
//
|
|
// Summary:
|
|
// This function will start with given item and find the next
|
|
// item that is selected. If the given item is selected, that
|
|
// item number will be returned.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
// iItem [in] - value to start check at
|
|
//
|
|
// Return:
|
|
// -1 if none found, otherwise the item
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 04-Jan-95 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::NextSelected( LONG iItem, LONG *piItem )
|
|
{
|
|
LONG i;
|
|
|
|
ASSERT( iItem >= SELRANGE_MINVALUE );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
if (!_FindValue( iItem, &i ) )
|
|
{
|
|
i++;
|
|
if (i < _cSelRanges-1)
|
|
{
|
|
iItem = _VSelRanges[i].iBegin;
|
|
}
|
|
else
|
|
{
|
|
iItem = -1;
|
|
}
|
|
}
|
|
|
|
ASSERT( iItem >= -1 );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
*piItem = iItem;
|
|
return S_OK;
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: NextUnSelected
|
|
//
|
|
// Summary:
|
|
// This function will start with given item and find the next
|
|
// item that is not selected. If the given item is not selected, that
|
|
// item number will be returned.
|
|
//
|
|
// Arguments:
|
|
// hselrange [in] - the hselrange object to use
|
|
// iItem [in] - value to start check at
|
|
//
|
|
// Return:
|
|
// -1 if none found, otherwise the item
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 04-Jan-95 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
HRESULT CLVRange::NextUnSelected( LONG iItem, LONG *piItem )
|
|
{
|
|
LONG i;
|
|
|
|
ASSERT( iItem >= SELRANGE_MINVALUE );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
if (_FindValue( iItem, &i ) )
|
|
{
|
|
if (i < _cSelRanges-1)
|
|
{
|
|
iItem = _VSelRanges[i].iEnd + 1;
|
|
if (iItem > SELRANGE_MAXVALUE)
|
|
{
|
|
iItem = -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
iItem = -1;
|
|
}
|
|
}
|
|
|
|
ASSERT( iItem >= -1 );
|
|
ASSERT( iItem <= SELRANGE_MAXVALUE );
|
|
|
|
*piItem = iItem;
|
|
return S_OK;
|
|
}
|
|
|
|
//-------------------------------------------------------------------
|
|
//
|
|
// Function: InvertRange
|
|
//
|
|
// Summary:
|
|
// This function will invert the range defined from the current
|
|
// ranges, compacting and enlarging as needed.
|
|
//
|
|
// Arguments:
|
|
// iBegin [in] - Begin of range to invert
|
|
// iEnd [in] - End of range to invert
|
|
//
|
|
// Return:
|
|
// SELRANGE_ERROR on memory error
|
|
// The difference in items selected from previous to current.
|
|
// negative values means less items are selected in that range now.
|
|
//
|
|
// Notes:
|
|
//
|
|
// History:
|
|
// 13-Dec-95 MikeMi Created
|
|
//
|
|
//-------------------------------------------------------------------
|
|
|
|
LONG CLVRange::InvertRange( LONG iBegin, LONG iEnd )
|
|
{
|
|
LONG iFirst; // index before or contains iBegin value
|
|
BOOL fSelect; // are we selecting or unselecting
|
|
LONG iTempE;
|
|
LONG iTempB;
|
|
HRESULT hres = S_OK;
|
|
|
|
ASSERT( iEnd >= iBegin );
|
|
ASSERT( iBegin >= SELRANGE_MINVALUE );
|
|
ASSERT( iEnd <= SELRANGE_MAXVALUE );
|
|
|
|
// find if first is selected or not
|
|
fSelect = !_FindValue( iBegin, &iFirst );
|
|
|
|
iTempE = iBegin - 1;
|
|
|
|
do
|
|
{
|
|
iTempB = iTempE + 1;
|
|
|
|
if (fSelect)
|
|
NextSelected( iTempB, &iTempE );
|
|
else
|
|
NextUnSelected( iTempB, &iTempE );
|
|
|
|
if (-1 == iTempE)
|
|
{
|
|
iTempE = SELRANGE_MAXVALUE;
|
|
}
|
|
else
|
|
{
|
|
iTempE--;
|
|
}
|
|
|
|
iTempE = min( iTempE, iEnd );
|
|
|
|
if (fSelect)
|
|
{
|
|
if (FAILED(hres = IncludeRange( iTempB, iTempE )))
|
|
{
|
|
return( hres );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (FAILED(hres = ExcludeRange( iTempB, iTempE )))
|
|
{
|
|
return( hres );
|
|
}
|
|
}
|
|
|
|
fSelect = !fSelect;
|
|
} while (iTempE < iEnd );
|
|
|
|
return( hres );
|
|
}
|