1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_ 6 #define WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_ 7 8 #include <Windows.h> 9 10 #include <vector> 11 12 #include "base/basictypes.h" 13 #include "base/memory/scoped_ptr.h" 14 15 namespace metro_viewer { 16 struct CharacterBounds; 17 } 18 19 namespace metro_driver { 20 21 class TextServiceDelegate; 22 23 // An interface to manage a virtual text store with which an IME communicates. 24 class TextService { 25 public: 26 virtual ~TextService() {} 27 28 // Cancels on-going composition. Does nothing if there is no composition. 29 virtual void CancelComposition() = 0; 30 31 // Updates document type with |input_scopes| and caret/composition position 32 // with |character_bounds|. An empty |input_scopes| indicates that IMEs 33 // should be disabled until non-empty |input_scopes| is specified. 34 // Note: |input_scopes| is defined as std::vector<int32> here rather than 35 // std::vector<InputScope> because the wire format of IPC message 36 // MetroViewerHostMsg_ImeTextInputClientUpdated uses std::vector<int32> to 37 // avoid dependency on <InputScope.h> header. 38 virtual void OnDocumentChanged( 39 const std::vector<int32>& input_scopes, 40 const std::vector<metro_viewer::CharacterBounds>& character_bounds) = 0; 41 42 // Must be called whenever the attached window gains keyboard focus. 43 virtual void OnWindowActivated() = 0; 44 }; 45 46 // Returns an instance of TextService that works together with 47 // |text_store_delegate| as if it was an text area owned by |window_handle|. 48 scoped_ptr<TextService> 49 CreateTextService(TextServiceDelegate* delegate, HWND window_handle); 50 51 } // namespace metro_driver 52 53 #endif // WIN8_METRO_DRIVER_IME_TEXT_SERVICE_H_ 54
