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1 // Copyright (c) 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 #include "ui/base/ime/input_method_tsf.h" | |
6 | |
7 #include "ui/base/ime/text_input_client.h" | |
8 #include "ui/base/ime/win/tsf_bridge.h" | |
9 #include "ui/base/ime/win/tsf_event_router.h" | |
10 | |
11 namespace ui { | |
12 | |
13 class InputMethodTSF::TSFEventObserver : public TSFEventRouterObserver { | |
14 public: | |
15 TSFEventObserver() : is_candidate_popup_open_(false) {} | |
16 | |
17 // Returns true if we know for sure that a candidate window (or IME suggest, | |
18 // etc.) is open. | |
19 bool IsCandidatePopupOpen() const { return is_candidate_popup_open_; } | |
20 | |
21 // Overridden from TSFEventRouterObserver: | |
22 virtual void OnCandidateWindowCountChanged(size_t window_count) OVERRIDE { | |
23 is_candidate_popup_open_ = (window_count != 0); | |
24 } | |
25 | |
26 private: | |
27 // True if we know for sure that a candidate window is open. | |
28 bool is_candidate_popup_open_; | |
29 | |
30 DISALLOW_COPY_AND_ASSIGN(TSFEventObserver); | |
31 }; | |
32 | |
33 InputMethodTSF::InputMethodTSF(internal::InputMethodDelegate* delegate, | |
34 HWND toplevel_window_handle) | |
35 : InputMethodWin(delegate, toplevel_window_handle), | |
36 tsf_event_observer_(new TSFEventObserver()), | |
37 tsf_event_router_(new TSFEventRouter(tsf_event_observer_.get())) { | |
38 // In non-Aura environment, appropriate callbacks to OnFocus() and OnBlur() | |
39 // are not implemented yet. To work around this limitation, here we use | |
40 // "always focused" model. | |
41 // TODO(ime): Fix the caller of OnFocus() and OnBlur() so that appropriate | |
42 // focus event will be passed. | |
43 InputMethodWin::OnFocus(); | |
44 } | |
45 | |
46 InputMethodTSF::~InputMethodTSF() {} | |
47 | |
48 void InputMethodTSF::OnFocus() { | |
49 // Do not call baseclass' OnFocus() and discard the event being in | |
50 // "always focused" model. See the comment in the constructor. | |
51 // TODO(ime): Implement OnFocus once the callers are fixed. | |
52 | |
53 tsf_event_router_->SetManager( | |
54 ui::TSFBridge::GetInstance()->GetThreadManager()); | |
55 } | |
56 | |
57 void InputMethodTSF::OnBlur() { | |
58 // Do not call baseclass' OnBlur() and discard the event being in | |
59 // "always focused" model. See the comment in the constructor. | |
60 // TODO(ime): Implement OnFocus once the callers are fixed. | |
61 | |
62 tsf_event_router_->SetManager(NULL); | |
63 } | |
64 | |
65 bool InputMethodTSF::OnUntranslatedIMEMessage( | |
66 const base::NativeEvent& event, InputMethod::NativeEventResult* result) { | |
67 LRESULT original_result = 0; | |
68 BOOL handled = FALSE; | |
69 // Even when TSF is enabled, following IMM32/Win32 messages must be handled. | |
70 switch (event.message) { | |
71 case WM_IME_REQUEST: | |
72 // Some TSF-native TIPs (Text Input Processors) such as ATOK and Mozc | |
73 // still rely on WM_IME_REQUEST message to implement reverse conversion. | |
74 original_result = OnImeRequest( | |
75 event.message, event.wParam, event.lParam, &handled); | |
76 break; | |
77 case WM_CHAR: | |
78 case WM_SYSCHAR: | |
79 // ui::InputMethod interface is responsible for handling Win32 character | |
80 // messages. For instance, we will be here in the following cases. | |
81 // - TIP is not activated. (e.g, the current language profile is English) | |
82 // - TIP does not handle and WM_KEYDOWN and WM_KEYDOWN is translated into | |
83 // WM_CHAR by TranslateMessage API. (e.g, TIP is turned off) | |
84 // - Another application sends WM_CHAR through SendMessage API. | |
85 original_result = OnChar( | |
86 event.hwnd, event.message, event.wParam, event.lParam, &handled); | |
87 break; | |
88 case WM_DEADCHAR: | |
89 case WM_SYSDEADCHAR: | |
90 // See the comment in WM_CHAR/WM_SYSCHAR. | |
91 original_result = OnDeadChar( | |
92 event.message, event.wParam, event.lParam, &handled); | |
93 break; | |
94 } | |
95 if (result) | |
96 *result = original_result; | |
97 return !!handled; | |
98 } | |
99 | |
100 void InputMethodTSF::OnTextInputTypeChanged(const TextInputClient* client) { | |
101 if (!IsTextInputClientFocused(client) || !IsWindowFocused(client)) | |
102 return; | |
103 ui::TSFBridge::GetInstance()->CancelComposition(); | |
104 ui::TSFBridge::GetInstance()->OnTextInputTypeChanged(client); | |
105 } | |
106 | |
107 void InputMethodTSF::OnCaretBoundsChanged(const TextInputClient* client) { | |
108 if (!IsTextInputClientFocused(client) || !IsWindowFocused(client)) | |
109 return; | |
110 ui::TSFBridge::GetInstance()->OnTextLayoutChanged(); | |
111 } | |
112 | |
113 void InputMethodTSF::CancelComposition(const TextInputClient* client) { | |
114 if (IsTextInputClientFocused(client) && IsWindowFocused(client)) | |
115 ui::TSFBridge::GetInstance()->CancelComposition(); | |
116 } | |
117 | |
118 void InputMethodTSF::DetachTextInputClient(TextInputClient* client) { | |
119 InputMethodWin::DetachTextInputClient(client); | |
120 ui::TSFBridge::GetInstance()->RemoveFocusedClient(client); | |
121 } | |
122 | |
123 bool InputMethodTSF::IsCandidatePopupOpen() const { | |
124 return tsf_event_observer_->IsCandidatePopupOpen(); | |
125 } | |
126 | |
127 void InputMethodTSF::OnWillChangeFocusedClient(TextInputClient* focused_before, | |
128 TextInputClient* focused) { | |
129 if (IsWindowFocused(focused_before)) { | |
130 ConfirmCompositionText(); | |
131 ui::TSFBridge::GetInstance()->RemoveFocusedClient(focused_before); | |
132 } | |
133 } | |
134 | |
135 void InputMethodTSF::OnDidChangeFocusedClient(TextInputClient* focused_before, | |
136 TextInputClient* focused) { | |
137 if (IsWindowFocused(focused) && IsTextInputClientFocused(focused)) { | |
138 ui::TSFBridge::GetInstance()->SetFocusedClient( | |
139 GetAttachedWindowHandle(focused), focused); | |
140 | |
141 // Force to update the input type since client's TextInputStateChanged() | |
142 // function might not be called if text input types before the client loses | |
143 // focus and after it acquires focus again are the same. | |
144 OnTextInputTypeChanged(focused); | |
145 | |
146 // Force to update caret bounds, in case the client thinks that the caret | |
147 // bounds has not changed. | |
148 OnCaretBoundsChanged(focused); | |
149 } | |
150 InputMethodWin::OnDidChangeFocusedClient(focused_before, focused); | |
151 } | |
152 | |
153 void InputMethodTSF::ConfirmCompositionText() { | |
154 if (!IsTextInputTypeNone()) | |
155 ui::TSFBridge::GetInstance()->ConfirmComposition(); | |
156 } | |
157 | |
158 } // namespace ui | |
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