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| 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 "ui/views/ime/input_method_bridge.h" | |
| 6 | |
| 7 #include "ui/base/ime/input_method.h" | |
| 8 #include "ui/base/ime/input_method_observer.h" | |
| 9 #include "ui/events/event.h" | |
| 10 #include "ui/gfx/rect.h" | |
| 11 #include "ui/views/view.h" | |
| 12 #include "ui/views/widget/widget.h" | |
| 13 | |
| 14 namespace views { | |
| 15 | |
| 16 // InputMethodBridge::HostObserver class --------------------------------------- | |
| 17 | |
| 18 // An observer class for observing the host input method. When the host input | |
| 19 // method is destroyed, it will null out the |host_| field on the | |
| 20 // InputMethodBridge object. | |
| 21 class InputMethodBridge::HostObserver : public ui::InputMethodObserver { | |
| 22 public: | |
| 23 explicit HostObserver(InputMethodBridge* bridge); | |
| 24 virtual ~HostObserver(); | |
| 25 | |
| 26 virtual void OnTextInputTypeChanged( | |
| 27 const ui::TextInputClient* client) override {} | |
| 28 virtual void OnFocus() override {} | |
| 29 virtual void OnBlur() override {} | |
| 30 virtual void OnCaretBoundsChanged( | |
| 31 const ui::TextInputClient* client) override {} | |
| 32 virtual void OnTextInputStateChanged( | |
| 33 const ui::TextInputClient* client) override {} | |
| 34 virtual void OnInputMethodDestroyed( | |
| 35 const ui::InputMethod* input_method) override; | |
| 36 virtual void OnShowImeIfNeeded() override {} | |
| 37 | |
| 38 private: | |
| 39 InputMethodBridge* bridge_; | |
| 40 | |
| 41 DISALLOW_COPY_AND_ASSIGN(HostObserver); | |
| 42 }; | |
| 43 | |
| 44 InputMethodBridge::HostObserver::HostObserver(InputMethodBridge* bridge) | |
| 45 : bridge_(bridge) { | |
| 46 bridge_->host_->AddObserver(this); | |
| 47 } | |
| 48 | |
| 49 InputMethodBridge::HostObserver::~HostObserver() { | |
| 50 if (bridge_->host_) | |
| 51 bridge_->host_->RemoveObserver(this); | |
| 52 } | |
| 53 | |
| 54 void InputMethodBridge::HostObserver::OnInputMethodDestroyed( | |
| 55 const ui::InputMethod* input_method) { | |
| 56 DCHECK_EQ(bridge_->host_, input_method); | |
| 57 bridge_->host_->RemoveObserver(this); | |
| 58 bridge_->host_ = NULL; | |
| 59 } | |
| 60 | |
| 61 // InputMethodBridge class ----------------------------------------------------- | |
| 62 | |
| 63 InputMethodBridge::InputMethodBridge(internal::InputMethodDelegate* delegate, | |
| 64 ui::InputMethod* host, | |
| 65 bool shared_input_method) | |
| 66 : host_(host), | |
| 67 shared_input_method_(shared_input_method) { | |
| 68 DCHECK(host_); | |
| 69 SetDelegate(delegate); | |
| 70 | |
| 71 host_observer_.reset(new HostObserver(this)); | |
| 72 } | |
| 73 | |
| 74 InputMethodBridge::~InputMethodBridge() { | |
| 75 // By the time we get here it's very likely |widget_|'s NativeWidget has been | |
| 76 // destroyed. This means any calls to |widget_| that go to the NativeWidget, | |
| 77 // such as IsActive(), will crash. SetFocusedTextInputClient() may callback to | |
| 78 // this and go into |widget_|. NULL out |widget_| so we don't attempt to use | |
| 79 // it. | |
| 80 DetachFromWidget(); | |
| 81 | |
| 82 // Host input method might have been destroyed at this point. | |
| 83 if (host_) | |
| 84 host_->DetachTextInputClient(this); | |
| 85 } | |
| 86 | |
| 87 void InputMethodBridge::OnFocus() { | |
| 88 DCHECK(host_); | |
| 89 | |
| 90 // Direct the shared IME to send TextInputClient messages to |this| object. | |
| 91 if (shared_input_method_ || !host_->GetTextInputClient()) | |
| 92 host_->SetFocusedTextInputClient(this); | |
| 93 | |
| 94 // TODO(yusukes): We don't need to call OnTextInputTypeChanged() once we move | |
| 95 // text input type tracker code to ui::InputMethodBase. | |
| 96 if (GetFocusedView()) { | |
| 97 OnTextInputTypeChanged(GetFocusedView()); | |
| 98 OnCaretBoundsChanged(GetFocusedView()); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void InputMethodBridge::OnBlur() { | |
| 103 DCHECK(host_); | |
| 104 | |
| 105 if (HasCompositionText()) { | |
| 106 ConfirmCompositionText(); | |
| 107 host_->CancelComposition(this); | |
| 108 } | |
| 109 | |
| 110 if (host_->GetTextInputClient() == this) | |
| 111 host_->SetFocusedTextInputClient(NULL); | |
| 112 } | |
| 113 | |
| 114 bool InputMethodBridge::OnUntranslatedIMEMessage(const base::NativeEvent& event, | |
| 115 NativeEventResult* result) { | |
| 116 DCHECK(host_); | |
| 117 | |
| 118 return host_->OnUntranslatedIMEMessage(event, result); | |
| 119 } | |
| 120 | |
| 121 void InputMethodBridge::DispatchKeyEvent(const ui::KeyEvent& key) { | |
| 122 DCHECK(key.type() == ui::ET_KEY_PRESSED || key.type() == ui::ET_KEY_RELEASED); | |
| 123 | |
| 124 // We can just dispatch the event here since the |key| is already processed by | |
| 125 // the system-wide IME. | |
| 126 DispatchKeyEventPostIME(key); | |
| 127 } | |
| 128 | |
| 129 void InputMethodBridge::OnTextInputTypeChanged(View* view) { | |
| 130 DCHECK(host_); | |
| 131 | |
| 132 if (IsViewFocused(view)) | |
| 133 host_->OnTextInputTypeChanged(this); | |
| 134 InputMethodBase::OnTextInputTypeChanged(view); | |
| 135 } | |
| 136 | |
| 137 void InputMethodBridge::OnCaretBoundsChanged(View* view) { | |
| 138 DCHECK(host_); | |
| 139 | |
| 140 if (IsViewFocused(view) && !IsTextInputTypeNone()) | |
| 141 host_->OnCaretBoundsChanged(this); | |
| 142 } | |
| 143 | |
| 144 void InputMethodBridge::CancelComposition(View* view) { | |
| 145 DCHECK(host_); | |
| 146 | |
| 147 if (IsViewFocused(view)) | |
| 148 host_->CancelComposition(this); | |
| 149 } | |
| 150 | |
| 151 void InputMethodBridge::OnInputLocaleChanged() { | |
| 152 DCHECK(host_); | |
| 153 | |
| 154 host_->OnInputLocaleChanged(); | |
| 155 } | |
| 156 | |
| 157 std::string InputMethodBridge::GetInputLocale() { | |
| 158 DCHECK(host_); | |
| 159 | |
| 160 return host_->GetInputLocale(); | |
| 161 } | |
| 162 | |
| 163 bool InputMethodBridge::IsActive() { | |
| 164 DCHECK(host_); | |
| 165 | |
| 166 return host_->IsActive(); | |
| 167 } | |
| 168 | |
| 169 bool InputMethodBridge::IsCandidatePopupOpen() const { | |
| 170 DCHECK(host_); | |
| 171 | |
| 172 return host_->IsCandidatePopupOpen(); | |
| 173 } | |
| 174 | |
| 175 void InputMethodBridge::ShowImeIfNeeded() { | |
| 176 DCHECK(host_); | |
| 177 host_->ShowImeIfNeeded(); | |
| 178 } | |
| 179 | |
| 180 // Overridden from TextInputClient. Forward an event from the system-wide IME | |
| 181 // to the text input |client|, which is e.g. views::Textfield. | |
| 182 void InputMethodBridge::SetCompositionText( | |
| 183 const ui::CompositionText& composition) { | |
| 184 TextInputClient* client = GetTextInputClient(); | |
| 185 if (client) | |
| 186 client->SetCompositionText(composition); | |
| 187 } | |
| 188 | |
| 189 void InputMethodBridge::ConfirmCompositionText() { | |
| 190 TextInputClient* client = GetTextInputClient(); | |
| 191 if (client) | |
| 192 client->ConfirmCompositionText(); | |
| 193 } | |
| 194 | |
| 195 void InputMethodBridge::ClearCompositionText() { | |
| 196 TextInputClient* client = GetTextInputClient(); | |
| 197 if (client) | |
| 198 client->ClearCompositionText(); | |
| 199 } | |
| 200 | |
| 201 void InputMethodBridge::InsertText(const base::string16& text) { | |
| 202 TextInputClient* client = GetTextInputClient(); | |
| 203 if (client) | |
| 204 client->InsertText(text); | |
| 205 } | |
| 206 | |
| 207 void InputMethodBridge::InsertChar(base::char16 ch, int flags) { | |
| 208 TextInputClient* client = GetTextInputClient(); | |
| 209 if (client) | |
| 210 client->InsertChar(ch, flags); | |
| 211 } | |
| 212 | |
| 213 gfx::NativeWindow InputMethodBridge::GetAttachedWindow() const { | |
| 214 TextInputClient* client = GetTextInputClient(); | |
| 215 return client ? | |
| 216 client->GetAttachedWindow() : static_cast<gfx::NativeWindow>(NULL); | |
| 217 } | |
| 218 | |
| 219 ui::TextInputType InputMethodBridge::GetTextInputType() const { | |
| 220 TextInputClient* client = GetTextInputClient(); | |
| 221 return client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE; | |
| 222 } | |
| 223 | |
| 224 ui::TextInputMode InputMethodBridge::GetTextInputMode() const { | |
| 225 TextInputClient* client = GetTextInputClient(); | |
| 226 return client ? client->GetTextInputMode() : ui::TEXT_INPUT_MODE_DEFAULT; | |
| 227 } | |
| 228 | |
| 229 bool InputMethodBridge::CanComposeInline() const { | |
| 230 TextInputClient* client = GetTextInputClient(); | |
| 231 return client ? client->CanComposeInline() : true; | |
| 232 } | |
| 233 | |
| 234 gfx::Rect InputMethodBridge::GetCaretBounds() const { | |
| 235 TextInputClient* client = GetTextInputClient(); | |
| 236 if (!client) | |
| 237 return gfx::Rect(); | |
| 238 | |
| 239 return client->GetCaretBounds(); | |
| 240 } | |
| 241 | |
| 242 bool InputMethodBridge::GetCompositionCharacterBounds(uint32 index, | |
| 243 gfx::Rect* rect) const { | |
| 244 DCHECK(rect); | |
| 245 TextInputClient* client = GetTextInputClient(); | |
| 246 if (!client) | |
| 247 return false; | |
| 248 | |
| 249 return client->GetCompositionCharacterBounds(index, rect); | |
| 250 } | |
| 251 | |
| 252 bool InputMethodBridge::HasCompositionText() const { | |
| 253 TextInputClient* client = GetTextInputClient(); | |
| 254 return client ? client->HasCompositionText() : false; | |
| 255 } | |
| 256 | |
| 257 bool InputMethodBridge::GetTextRange(gfx::Range* range) const { | |
| 258 TextInputClient* client = GetTextInputClient(); | |
| 259 return client ? client->GetTextRange(range) : false; | |
| 260 } | |
| 261 | |
| 262 bool InputMethodBridge::GetCompositionTextRange(gfx::Range* range) const { | |
| 263 TextInputClient* client = GetTextInputClient(); | |
| 264 return client ? client->GetCompositionTextRange(range) : false; | |
| 265 } | |
| 266 | |
| 267 bool InputMethodBridge::GetSelectionRange(gfx::Range* range) const { | |
| 268 TextInputClient* client = GetTextInputClient(); | |
| 269 return client ? client->GetSelectionRange(range) : false; | |
| 270 } | |
| 271 | |
| 272 bool InputMethodBridge::SetSelectionRange(const gfx::Range& range) { | |
| 273 TextInputClient* client = GetTextInputClient(); | |
| 274 return client ? client->SetSelectionRange(range) : false; | |
| 275 } | |
| 276 | |
| 277 bool InputMethodBridge::DeleteRange(const gfx::Range& range) { | |
| 278 TextInputClient* client = GetTextInputClient(); | |
| 279 return client ? client->DeleteRange(range) : false; | |
| 280 } | |
| 281 | |
| 282 bool InputMethodBridge::GetTextFromRange(const gfx::Range& range, | |
| 283 base::string16* text) const { | |
| 284 TextInputClient* client = GetTextInputClient(); | |
| 285 return client ? client->GetTextFromRange(range, text) : false; | |
| 286 } | |
| 287 | |
| 288 void InputMethodBridge::OnInputMethodChanged() { | |
| 289 TextInputClient* client = GetTextInputClient(); | |
| 290 if (client) | |
| 291 client->OnInputMethodChanged(); | |
| 292 } | |
| 293 | |
| 294 bool InputMethodBridge::ChangeTextDirectionAndLayoutAlignment( | |
| 295 base::i18n::TextDirection direction) { | |
| 296 TextInputClient* client = GetTextInputClient(); | |
| 297 return client ? | |
| 298 client->ChangeTextDirectionAndLayoutAlignment(direction) : false; | |
| 299 } | |
| 300 | |
| 301 void InputMethodBridge::ExtendSelectionAndDelete(size_t before, size_t after) { | |
| 302 TextInputClient* client = GetTextInputClient(); | |
| 303 if (client) | |
| 304 client->ExtendSelectionAndDelete(before, after); | |
| 305 } | |
| 306 | |
| 307 void InputMethodBridge::EnsureCaretInRect(const gfx::Rect& rect) { | |
| 308 TextInputClient* client = GetTextInputClient(); | |
| 309 if (client) | |
| 310 client->EnsureCaretInRect(rect); | |
| 311 } | |
| 312 | |
| 313 void InputMethodBridge::OnCandidateWindowShown() { | |
| 314 } | |
| 315 | |
| 316 void InputMethodBridge::OnCandidateWindowUpdated() { | |
| 317 } | |
| 318 | |
| 319 void InputMethodBridge::OnCandidateWindowHidden() { | |
| 320 } | |
| 321 | |
| 322 bool InputMethodBridge::IsEditingCommandEnabled(int command_id) { | |
| 323 return false; | |
| 324 } | |
| 325 | |
| 326 void InputMethodBridge::ExecuteEditingCommand(int command_id) { | |
| 327 } | |
| 328 | |
| 329 // Overridden from FocusChangeListener. | |
| 330 void InputMethodBridge::OnWillChangeFocus(View* focused_before, View* focused) { | |
| 331 if (HasCompositionText()) { | |
| 332 ConfirmCompositionText(); | |
| 333 CancelComposition(focused_before); | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 void InputMethodBridge::OnDidChangeFocus(View* focused_before, View* focused) { | |
| 338 DCHECK_EQ(GetFocusedView(), focused); | |
| 339 OnTextInputTypeChanged(focused); | |
| 340 OnCaretBoundsChanged(focused); | |
| 341 } | |
| 342 | |
| 343 ui::InputMethod* InputMethodBridge::GetHostInputMethod() const { | |
| 344 return host_; | |
| 345 } | |
| 346 | |
| 347 | |
| 348 } // namespace views | |
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