1 files changed, 44 insertions, 0 deletions
diff --git a/views/ime/character_composer.h b/views/ime/character_composer.h
new file mode 100644
index 0000000..f56ebc3
--- /dev/null
+++ b/views/ime/character_composer.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2011 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 VIEWS_IME_CHARACTER_COMPOSER_H_
+#define VIEWS_IME_CHARACTER_COMPOSER_H_
+#pragma once
+
+#include <vector>
+#include "base/basictypes.h"
+#include "base/string_util.h"
+
+namespace views {
+
+// A class to recognize compose and dead key sequence.
+// Outputs composed character.
+//
+// TODO(hashimoto): support unicode character composition starting with
+// Ctrl-Shift-U. http://crosbug.com/15925
+class CharacterComposer {
+ public:
+  CharacterComposer();
+
+  void Reset();
+
+  // Filters keypress.  Returns true if the keypress is handled.
+  bool FilterKeyPress(unsigned int keycode);
+
+  // Returns a string consisting of composed character.
+  // Empty is returned when there is no composition result.
+  const string16& GetComposedCharacter() const {
+    return composed_character_;
+  }
+
+ private:
+  std::vector<unsigned int> compose_buffer_;
+  string16 composed_character_;
+
+  DISALLOW_COPY_AND_ASSIGN(CharacterComposer);
+};
+
+}  // namespace views
+
+#endif  // VIEWS_IME_CHARACTER_COMPOSER_H_