WIP: Ash IME support

win8/metro_driver/ime/text_service.h

Index: win8/metro_driver/ime/text_service.h
diff --git a/win8/metro_driver/ime/text_service.h b/win8/metro_driver/ime/text_service.h
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index 0000000000000000000000000000000000000000..e915a9e302a3fd39338a75537463c1ca4b5bdf94
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+++ b/win8/metro_driver/ime/text_service.h
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+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_
+#define WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_
+
+#include <Windows.h>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace metro_driver {
+
+class TextStoreDelegate;
+
+// A high level interface to interact with virtual text store built on top of
+// Text Services Framewors (TSF).
+class TextService {
+ public:
+  TextService(HWND window_handle, TextStoreDelegate* text_store_delegate);
+  ~TextService();
+
+  // Cancels on-going composition. Does nothing if there is no composition.
+  void CancelComposition();
+
+  // Updates document type with |input_scopes|. An empty |input_scopes|
+  // represents IMEs should be disabled until non-empty |input_scopes| is
+  // specified.
+  // Note: |input_scopes| is defined as std::vector<int32> here rather than
+  // std::vector<InputScope> because the wire format of IPC message
+  // MetroViewerHostMsg_ImeTextInputClientUpdated uses std::vector<int32> to
+  // avoid dependency on <InputScope.h> header.
+  void OnDocumentTypeChanged(const std::vector<int32>& input_scopes);
+
+  // Notifies TSF that the attached window gains keyboard focus.
+  void OnWindowActivated();
+
+ private:
+  struct InternalState;
+  scoped_ptr<InternalState> state_;
+
+  DISALLOW_COPY_AND_ASSIGN(TextService);
+};
+
+}  // namespace metro_driver
+
+#endif  // WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_