Composition.cpp

//////////////////////////////////////////////////////////////////////
//
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
//  TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//  PARTICULAR PURPOSE.
//
//  Copyright (C) 2003  Microsoft Corporation.  All rights reserved.
//
//  Composition.cpp
//
//          ITfCompositionSink interface and compositon utilities
//
//////////////////////////////////////////////////////////////////////

#include "Globals.h"
#include "TextService.h"

//+---------------------------------------------------------------------------
//
// OnCompositionTerminated
//
// Callback for ITfCompositionSink.  The system calls this method whenever
// someone other than this service ends a composition.
//----------------------------------------------------------------------------

STDAPI CTextService::OnCompositionTerminated(TfEditCookie ecWrite, ITfComposition *pComposition)
{

    // releae our cached composition
    if (_pComposition != NULL)
    {
        _pComposition->Release();
        _pComposition = NULL;
    }

    _ResetCompositionState();

    return S_OK;
}

//+---------------------------------------------------------------------------
//
// _IsComposing
//
//----------------------------------------------------------------------------

BOOL CTextService::_IsComposing()
{
    return _pComposition != NULL;
}

//+---------------------------------------------------------------------------
//
// _SetComposition
//
//----------------------------------------------------------------------------

void CTextService::_SetComposition(ITfComposition *pComposition)
{
    _pComposition = pComposition;
    if (pComposition != NULL)
    {
        _compositionState.Begin();
        _compositionPhase = _compositionState.GetPhase();
    }
    else
    {
        _ResetCompositionState();
    }
}