| // 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. |
| |
| #include "ui/base/ime/input_method_tsf.h" |
| |
| #include "ui/base/ime/text_input_client.h" |
| #include "ui/base/ime/win/tsf_bridge.h" |
| #include "ui/base/ime/win/tsf_event_router.h" |
| |
| namespace ui { |
| |
| class InputMethodTSF::TSFEventObserver : public TSFEventRouterObserver { |
| public: |
| TSFEventObserver() : is_candidate_popup_open_(false) {} |
| |
| // Returns true if we know for sure that a candidate window (or IME suggest, |
| // etc.) is open. |
| bool IsCandidatePopupOpen() const { return is_candidate_popup_open_; } |
| |
| // Overridden from TSFEventRouterObserver: |
| virtual void OnCandidateWindowCountChanged(size_t window_count) OVERRIDE { |
| is_candidate_popup_open_ = (window_count != 0); |
| } |
| |
| private: |
| // True if we know for sure that a candidate window is open. |
| bool is_candidate_popup_open_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TSFEventObserver); |
| }; |
| |
| InputMethodTSF::InputMethodTSF(internal::InputMethodDelegate* delegate, |
| HWND toplevel_window_handle) |
| : InputMethodWin(delegate, toplevel_window_handle), |
| tsf_event_observer_(new TSFEventObserver()), |
| tsf_event_router_(new TSFEventRouter(tsf_event_observer_.get())) { |
| // In non-Aura environment, appropriate callbacks to OnFocus() and OnBlur() |
| // are not implemented yet. To work around this limitation, here we use |
| // "always focused" model. |
| // TODO(ime): Fix the caller of OnFocus() and OnBlur() so that appropriate |
| // focus event will be passed. |
| InputMethodWin::OnFocus(); |
| } |
| |
| InputMethodTSF::~InputMethodTSF() {} |
| |
| void InputMethodTSF::OnFocus() { |
| // Do not call baseclass' OnFocus() and discard the event being in |
| // "always focused" model. See the comment in the constructor. |
| // TODO(ime): Implement OnFocus once the callers are fixed. |
| |
| tsf_event_router_->SetManager( |
| ui::TSFBridge::GetInstance()->GetThreadManager()); |
| } |
| |
| void InputMethodTSF::OnBlur() { |
| // Do not call baseclass' OnBlur() and discard the event being in |
| // "always focused" model. See the comment in the constructor. |
| // TODO(ime): Implement OnFocus once the callers are fixed. |
| |
| tsf_event_router_->SetManager(NULL); |
| } |
| |
| bool InputMethodTSF::OnUntranslatedIMEMessage( |
| const base::NativeEvent& event, InputMethod::NativeEventResult* result) { |
| LRESULT original_result = 0; |
| BOOL handled = FALSE; |
| // Even when TSF is enabled, following IMM32/Win32 messages must be handled. |
| switch (event.message) { |
| case WM_IME_REQUEST: |
| // Some TSF-native TIPs (Text Input Processors) such as ATOK and Mozc |
| // still rely on WM_IME_REQUEST message to implement reverse conversion. |
| original_result = OnImeRequest( |
| event.message, event.wParam, event.lParam, &handled); |
| break; |
| case WM_CHAR: |
| case WM_SYSCHAR: |
| // ui::InputMethod interface is responsible for handling Win32 character |
| // messages. For instance, we will be here in the following cases. |
| // - TIP is not activated. (e.g, the current language profile is English) |
| // - TIP does not handle and WM_KEYDOWN and WM_KEYDOWN is translated into |
| // WM_CHAR by TranslateMessage API. (e.g, TIP is turned off) |
| // - Another application sends WM_CHAR through SendMessage API. |
| original_result = OnChar( |
| event.hwnd, event.message, event.wParam, event.lParam, &handled); |
| break; |
| case WM_DEADCHAR: |
| case WM_SYSDEADCHAR: |
| // See the comment in WM_CHAR/WM_SYSCHAR. |
| original_result = OnDeadChar( |
| event.message, event.wParam, event.lParam, &handled); |
| break; |
| } |
| if (result) |
| *result = original_result; |
| return !!handled; |
| } |
| |
| void InputMethodTSF::OnTextInputTypeChanged(const TextInputClient* client) { |
| if (IsTextInputClientFocused(client) && IsWindowFocused(client)) { |
| ui::TSFBridge::GetInstance()->CancelComposition(); |
| ui::TSFBridge::GetInstance()->OnTextInputTypeChanged(client); |
| } |
| InputMethodWin::OnTextInputTypeChanged(client); |
| } |
| |
| void InputMethodTSF::OnCaretBoundsChanged(const TextInputClient* client) { |
| if (IsTextInputClientFocused(client) && IsWindowFocused(client)) |
| ui::TSFBridge::GetInstance()->OnTextLayoutChanged(); |
| } |
| |
| void InputMethodTSF::CancelComposition(const TextInputClient* client) { |
| if (IsTextInputClientFocused(client) && IsWindowFocused(client)) |
| ui::TSFBridge::GetInstance()->CancelComposition(); |
| } |
| |
| void InputMethodTSF::SetFocusedTextInputClient(TextInputClient* client) { |
| if (IsWindowFocused(client)) { |
| ui::TSFBridge::GetInstance()->SetFocusedClient( |
| GetAttachedWindowHandle(client), client); |
| } else if (!client) { |
| // SetFocusedTextInputClient(NULL) must be interpreted as |
| // "Remove the attached client". |
| ui::TSFBridge::GetInstance()->RemoveFocusedClient( |
| ui::TSFBridge::GetInstance()->GetFocusedTextInputClient()); |
| } |
| InputMethodWin::SetFocusedTextInputClient(client); |
| } |
| |
| bool InputMethodTSF::IsCandidatePopupOpen() const { |
| return tsf_event_observer_->IsCandidatePopupOpen(); |
| } |
| |
| void InputMethodTSF::OnWillChangeFocusedClient(TextInputClient* focused_before, |
| TextInputClient* focused) { |
| if (IsWindowFocused(focused_before)) { |
| ConfirmCompositionText(); |
| ui::TSFBridge::GetInstance()->RemoveFocusedClient(focused_before); |
| } |
| } |
| |
| void InputMethodTSF::OnDidChangeFocusedClient(TextInputClient* focused_before, |
| TextInputClient* focused) { |
| if (IsWindowFocused(focused)) { |
| ui::TSFBridge::GetInstance()->SetFocusedClient( |
| GetAttachedWindowHandle(focused), focused); |
| // Force to update the input type since client's TextInputStateChanged() |
| // function might not be called if text input types before the client loses |
| // focus and after it acquires focus again are the same. |
| OnTextInputTypeChanged(focused); |
| |
| // Force to update caret bounds, in case the client thinks that the caret |
| // bounds has not changed. |
| OnCaretBoundsChanged(focused); |
| } |
| } |
| |
| void InputMethodTSF::ConfirmCompositionText() { |
| if (!IsTextInputTypeNone()) |
| ui::TSFBridge::GetInstance()->ConfirmComposition(); |
| } |
| |
| bool InputMethodTSF::IsWindowFocused(const TextInputClient* client) const { |
| if (!client) |
| return false; |
| HWND attached_window_handle = GetAttachedWindowHandle(client); |
| return attached_window_handle && GetFocus() == attached_window_handle; |
| } |
| |
| } // namespace ui |