First commit.

GetTextExtentEditSession.cpp

@@ -0,0 +1,43 @@
+// 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) Microsoft Corporation. All rights reserved
+
+#include "Private.h"
+#include "EditSession.h"
+#include "GetTextExtentEditSession.h"
+#include "TfTextLayoutSink.h"
+
+//+---------------------------------------------------------------------------
+//
+// ctor
+//
+//----------------------------------------------------------------------------
+
+CGetTextExtentEditSession::CGetTextExtentEditSession(_In_ CSampleIME *pTextService, _In_ ITfContext *pContext, _In_ ITfContextView *pContextView, _In_ ITfRange *pRangeComposition, _In_ CTfTextLayoutSink *pTfTextLayoutSink) : CEditSessionBase(pTextService, pContext)
+{
+    _pContextView = pContextView;
+    _pRangeComposition = pRangeComposition;
+    _pTfTextLayoutSink = pTfTextLayoutSink;
+}
+
+//+---------------------------------------------------------------------------
+//
+// ITfEditSession::DoEditSession
+//
+//----------------------------------------------------------------------------
+
+STDAPI CGetTextExtentEditSession::DoEditSession(TfEditCookie ec)
+{
+    RECT rc = {0, 0, 0, 0};
+    BOOL isClipped = TRUE;
+
+    if (SUCCEEDED(_pContextView->GetTextExt(ec, _pRangeComposition, &rc, &isClipped)))
+    {
+        _pTfTextLayoutSink->_LayoutChangeNotification(&rc);
+    }
+
+    return S_OK;
+}