170 lines
5.1 KiB
C++
170 lines
5.1 KiB
C++
/*++
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Copyright (c) Microsoft Corporation.
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Licensed under the MIT license.
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Module Name:
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TfTxtevCb.cpp
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Abstract:
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This file implements the CTextEventSinkCallBack Class.
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Author:
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Revision History:
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Notes:
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--*/
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#include "precomp.h"
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#include "ConsoleTSF.h"
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#include "TfEditses.h"
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//+---------------------------------------------------------------------------
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//
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// CConsoleTSF::HasCompositionChanged
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//
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//----------------------------------------------------------------------------
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BOOL CConsoleTSF::_HasCompositionChanged(ITfContext* pInputContext, TfEditCookie ecReadOnly, ITfEditRecord* pEditRecord)
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{
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BOOL fChanged;
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if (SUCCEEDED(pEditRecord->GetSelectionStatus(&fChanged)))
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{
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if (fChanged)
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{
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return TRUE;
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}
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}
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//
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// Find GUID_PROP_CONIME_TRACKCOMPOSITION property.
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//
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wil::com_ptr_nothrow<ITfProperty> Property;
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wil::com_ptr_nothrow<ITfRange> FoundRange;
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wil::com_ptr_nothrow<ITfProperty> PropertyTrackComposition;
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BOOL bFound = FALSE;
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if (SUCCEEDED(pInputContext->GetProperty(GUID_PROP_CONIME_TRACKCOMPOSITION, &Property)))
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{
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wil::com_ptr_nothrow<IEnumTfRanges> EnumFindFirstTrackCompRange;
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if (SUCCEEDED(Property->EnumRanges(ecReadOnly, &EnumFindFirstTrackCompRange, NULL)))
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{
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HRESULT hr;
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wil::com_ptr_nothrow<ITfRange> range;
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while ((hr = EnumFindFirstTrackCompRange->Next(1, &range, NULL)) == S_OK)
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{
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VARIANT var;
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VariantInit(&var);
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hr = Property->GetValue(ecReadOnly, range.get(), &var);
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if (SUCCEEDED(hr))
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{
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if ((V_VT(&var) == VT_I4 && V_I4(&var) != 0))
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{
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range->Clone(&FoundRange);
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bFound = TRUE; // FOUND!!
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break;
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}
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}
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VariantClear(&var);
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if (bFound)
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{
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break; // FOUND!!
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}
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}
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}
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}
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//
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// if there is no track composition property,
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// the composition has been changed since we put it.
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//
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if (!bFound)
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{
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return TRUE;
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}
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if (FoundRange == NULL)
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{
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return FALSE;
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}
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bFound = FALSE; // RESET bFound flag...
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wil::com_ptr_nothrow<ITfRange> rangeTrackComposition;
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if (SUCCEEDED(FoundRange->Clone(&rangeTrackComposition)))
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{
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//
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// get the text range that does not include read only area for
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// reconversion.
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//
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wil::com_ptr_nothrow<ITfRange> rangeAllText;
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LONG cch;
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if (SUCCEEDED(CEditSessionObject::GetAllTextRange(ecReadOnly, pInputContext, &rangeAllText, &cch)))
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{
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LONG lResult;
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if (SUCCEEDED(rangeTrackComposition->CompareStart(ecReadOnly, rangeAllText.get(), TF_ANCHOR_START, &lResult)))
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{
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//
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// if the start position of the track composition range is not
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// the beggining of IC,
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// the composition has been changed since we put it.
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//
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if (lResult != 0)
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{
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bFound = TRUE; // FOUND!!
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}
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else if (SUCCEEDED(rangeTrackComposition->CompareEnd(ecReadOnly, rangeAllText.get(), TF_ANCHOR_END, &lResult)))
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{
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//
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// if the start position of the track composition range is not
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// the beggining of IC,
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// the composition has been changed since we put it.
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//
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//
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// If we find the changes in these property, we need to update hIMC.
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//
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const GUID* guids[] = { &GUID_PROP_COMPOSING,
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&GUID_PROP_ATTRIBUTE };
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const int guid_size = sizeof(guids) / sizeof(GUID*);
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wil::com_ptr_nothrow<IEnumTfRanges> EnumPropertyChanged;
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if (lResult != 0)
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{
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bFound = TRUE; // FOUND!!
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}
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else if (SUCCEEDED(pEditRecord->GetTextAndPropertyUpdates(TF_GTP_INCL_TEXT, guids, guid_size, &EnumPropertyChanged)))
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{
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HRESULT hr;
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wil::com_ptr_nothrow<ITfRange> range;
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while ((hr = EnumPropertyChanged->Next(1, &range, NULL)) == S_OK)
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{
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BOOL empty;
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if (range->IsEmpty(ecReadOnly, &empty) == S_OK && empty)
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{
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continue;
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}
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bFound = TRUE; // FOUND!!
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break;
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}
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}
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}
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}
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}
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}
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return bFound;
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}
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