1 // Copyright (c) 2012 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 #include "base/win/text_services_message_filter.h" 6 7 namespace base { 8 namespace win { 9 10 TextServicesMessageFilter::TextServicesMessageFilter() 11 : client_id_(TF_CLIENTID_NULL), 12 is_initialized_(false) { 13 } 14 15 TextServicesMessageFilter::~TextServicesMessageFilter() { 16 if (is_initialized_) 17 thread_mgr_->Deactivate(); 18 } 19 20 bool TextServicesMessageFilter::Init() { 21 if (FAILED(thread_mgr_.CreateInstance(CLSID_TF_ThreadMgr))) 22 return false; 23 24 if (FAILED(message_pump_.QueryFrom(thread_mgr_))) 25 return false; 26 27 if (FAILED(keystroke_mgr_.QueryFrom(thread_mgr_))) 28 return false; 29 30 if (FAILED(thread_mgr_->Activate(&client_id_))) 31 return false; 32 33 is_initialized_ = true; 34 return is_initialized_; 35 } 36 37 // Wraps for ITfMessagePump::PeekMessage with win32 PeekMessage signature. 38 // Obtains messages from application message queue. 39 BOOL TextServicesMessageFilter::DoPeekMessage(MSG* msg, 40 HWND window_handle, 41 UINT msg_filter_min, 42 UINT msg_filter_max, 43 UINT remove_msg) { 44 BOOL result = FALSE; 45 if (FAILED(message_pump_->PeekMessage(msg, window_handle, 46 msg_filter_min, msg_filter_max, 47 remove_msg, &result))) { 48 result = FALSE; 49 } 50 51 return result; 52 } 53 54 // Sends message to Text Service Manager. 55 // The message will be used to input composition text. 56 // Returns true if |message| was consumed by text service manager. 57 bool TextServicesMessageFilter::ProcessMessage(const MSG& msg) { 58 if (msg.message == WM_KEYDOWN) { 59 BOOL eaten = FALSE; 60 HRESULT hr = keystroke_mgr_->TestKeyDown(msg.wParam, msg.lParam, &eaten); 61 if (FAILED(hr) && !eaten) 62 return false; 63 eaten = FALSE; 64 hr = keystroke_mgr_->KeyDown(msg.wParam, msg.lParam, &eaten); 65 return (SUCCEEDED(hr) && !!eaten); 66 } 67 68 if (msg.message == WM_KEYUP) { 69 BOOL eaten = FALSE; 70 HRESULT hr = keystroke_mgr_->TestKeyUp(msg.wParam, msg.lParam, &eaten); 71 if (FAILED(hr) && !eaten) 72 return false; 73 eaten = FALSE; 74 hr = keystroke_mgr_->KeyUp(msg.wParam, msg.lParam, &eaten); 75 return (SUCCEEDED(hr) && !!eaten); 76 } 77 78 return false; 79 } 80 81 } // namespace win 82 } // namespace base 83
