148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
//////////////////////////////////////////////////////////////////////
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (C) 2003 Microsoft Corporation. All rights reserved.
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//
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// TextEditSink.cpp
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//
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// ITfTextEditSink implementation.
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//
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//////////////////////////////////////////////////////////////////////
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#include "globals.h"
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#include "TextService.h"
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BOOL IsRangeCovered(TfEditCookie ec, ITfRange *pRangeTest, ITfRange *pRangeCover);
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//+---------------------------------------------------------------------------
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//
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// OnEndEdit
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//
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// Called by the system whenever anyone releases a write-access document lock.
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//----------------------------------------------------------------------------
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STDAPI CTextService::OnEndEdit(ITfContext *pContext, TfEditCookie ecReadOnly, ITfEditRecord *pEditRecord)
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{
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BOOL fSelectionChanged;
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IEnumTfRanges *pEnumTextChanges;
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ITfRange *pRange;
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//
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// did the selection change?
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// The selection change includes the movement of caret as well.
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// The caret position is represent as the empty selection range when
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// there is no selection.
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//
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if (pEditRecord->GetSelectionStatus(&fSelectionChanged) == S_OK &&
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fSelectionChanged)
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{
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// If the selection is moved to out side of the current composition,
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// we terminate the composition. This TextService supports only one
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// composition in one context object.
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if (_IsComposing())
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{
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TF_SELECTION tfSelection;
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ULONG cFetched;
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if (pContext->GetSelection(ecReadOnly, TF_DEFAULT_SELECTION, 1, &tfSelection, &cFetched) == S_OK && cFetched == 1)
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{
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ITfRange *pRangeComposition;
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// is the insertion point covered by a composition?
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if (_pComposition->GetRange(&pRangeComposition) == S_OK)
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{
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if (!IsRangeCovered(ecReadOnly, tfSelection.range, pRangeComposition))
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{
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_EndComposition(pContext);
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}
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pRangeComposition->Release();
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}
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}
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}
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}
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// text modification?
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if (pEditRecord->GetTextAndPropertyUpdates(TF_GTP_INCL_TEXT, NULL, 0, &pEnumTextChanges) == S_OK)
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{
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if (pEnumTextChanges->Next(1, &pRange, NULL) == S_OK)
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{
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//
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// pRange is the updated range.
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//
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pRange->Release();
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}
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pEnumTextChanges->Release();
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}
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return S_OK;
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}
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//+---------------------------------------------------------------------------
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//
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// _InitTextEditSink
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//
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// Init a text edit sink on the topmost context of the document.
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// Always release any previous sink.
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//----------------------------------------------------------------------------
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BOOL CTextService::_InitTextEditSink(ITfDocumentMgr *pDocMgr)
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{
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ITfSource *pSource;
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BOOL fRet;
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// clear out any previous sink first
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if (_dwTextEditSinkCookie != TF_INVALID_COOKIE)
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{
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if (_pTextEditSinkContext->QueryInterface(IID_ITfSource, (void **)&pSource) == S_OK)
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{
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pSource->UnadviseSink(_dwTextEditSinkCookie);
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pSource->Release();
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}
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_pTextEditSinkContext->Release();
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_pTextEditSinkContext = NULL;
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_dwTextEditSinkCookie = TF_INVALID_COOKIE;
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}
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if (pDocMgr == NULL)
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return TRUE; // caller just wanted to clear the previous sink
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// setup a new sink advised to the topmost context of the document
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if (pDocMgr->GetTop(&_pTextEditSinkContext) != S_OK)
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return FALSE;
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if (_pTextEditSinkContext == NULL)
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return TRUE; // empty document, no sink possible
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fRet = FALSE;
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if (_pTextEditSinkContext->QueryInterface(IID_ITfSource, (void **)&pSource) == S_OK)
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{
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if (pSource->AdviseSink(IID_ITfTextEditSink, (ITfTextEditSink *)this, &_dwTextEditSinkCookie) == S_OK)
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{
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fRet = TRUE;
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}
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else
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{
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_dwTextEditSinkCookie = TF_INVALID_COOKIE;
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}
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pSource->Release();
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}
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if (fRet == FALSE)
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{
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_pTextEditSinkContext->Release();
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_pTextEditSinkContext = NULL;
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}
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return fRet;
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}
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