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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/geometry/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 ~HostObserver() override; | |
| 25 | |
| 26 void OnTextInputTypeChanged(const ui::TextInputClient* client) override {} | |
| 27 void OnFocus() override {} | |
| 28 void OnBlur() override {} | |
| 29 void OnCaretBoundsChanged(const ui::TextInputClient* client) override {} | |
| 30 void OnTextInputStateChanged(const ui::TextInputClient* client) override {} | |
| 31 void OnInputMethodDestroyed(const ui::InputMethod* input_method) override; | |
| 32 void OnShowImeIfNeeded() override {} | |
| 33 | |
| 34 private: | |
| 35 InputMethodBridge* bridge_; | |
| 36 | |
| 37 DISALLOW_COPY_AND_ASSIGN(HostObserver); | |
| 38 }; | |
| 39 | |
| 40 InputMethodBridge::HostObserver::HostObserver(InputMethodBridge* bridge) | |
| 41 : bridge_(bridge) { | |
| 42 bridge_->host_->AddObserver(this); | |
| 43 } | |
| 44 | |
| 45 InputMethodBridge::HostObserver::~HostObserver() { | |
| 46 if (bridge_->host_) | |
| 47 bridge_->host_->RemoveObserver(this); | |
| 48 } | |
| 49 | |
| 50 void InputMethodBridge::HostObserver::OnInputMethodDestroyed( | |
| 51 const ui::InputMethod* input_method) { | |
| 52 DCHECK_EQ(bridge_->host_, input_method); | |
| 53 bridge_->host_->RemoveObserver(this); | |
| 54 bridge_->host_ = NULL; | |
| 55 } | |
| 56 | |
| 57 // InputMethodBridge class ----------------------------------------------------- | |
| 58 | |
| 59 InputMethodBridge::InputMethodBridge(internal::InputMethodDelegate* delegate, | |
| 60 ui::InputMethod* host, | |
| 61 bool shared_input_method) | |
| 62 : host_(host), | |
| 63 shared_input_method_(shared_input_method) { | |
| 64 DCHECK(host_); | |
| 65 SetDelegate(delegate); | |
| 66 | |
| 67 host_observer_.reset(new HostObserver(this)); | |
| 68 } | |
| 69 | |
| 70 InputMethodBridge::~InputMethodBridge() { | |
| 71 // By the time we get here it's very likely |widget_|'s NativeWidget has been | |
| 72 // destroyed. This means any calls to |widget_| that go to the NativeWidget, | |
| 73 // such as IsActive(), will crash. SetFocusedTextInputClient() may callback to | |
| 74 // this and go into |widget_|. NULL out |widget_| so we don't attempt to use | |
| 75 // it. | |
| 76 DetachFromWidget(); | |
| 77 | |
| 78 // Host input method might have been destroyed at this point. | |
| 79 if (host_) | |
| 80 host_->DetachTextInputClient(this); | |
| 81 } | |
| 82 | |
| 83 void InputMethodBridge::OnFocus() { | |
| 84 if (!host_) // |host_| could be NULL after OnInputMethodDestroyed. | |
| 85 return; | |
| 86 | |
| 87 // Direct the shared IME to send TextInputClient messages to |this| object. | |
| 88 if (shared_input_method_ || !host_->GetTextInputClient()) | |
| 89 host_->SetFocusedTextInputClient(this); | |
| 90 | |
| 91 // TODO(yusukes): We don't need to call OnTextInputTypeChanged() once we move | |
| 92 // text input type tracker code to ui::InputMethodBase. | |
| 93 if (GetFocusedView()) { | |
| 94 OnTextInputTypeChanged(GetFocusedView()); | |
| 95 OnCaretBoundsChanged(GetFocusedView()); | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 void InputMethodBridge::OnBlur() { | |
| 100 if (!host_) // |host_| could be NULL after OnInputMethodDestroyed. | |
| 101 return; | |
| 102 | |
| 103 if (HasCompositionText()) { | |
| 104 ConfirmCompositionText(); | |
| 105 host_->CancelComposition(this); | |
| 106 } | |
| 107 | |
| 108 if (host_->GetTextInputClient() == this) | |
| 109 host_->SetFocusedTextInputClient(NULL); | |
| 110 } | |
| 111 | |
| 112 bool InputMethodBridge::OnUntranslatedIMEMessage(const base::NativeEvent& event, | |
| 113 NativeEventResult* result) { | |
| 114 DCHECK(host_); | |
| 115 | |
| 116 return host_->OnUntranslatedIMEMessage(event, result); | |
| 117 } | |
| 118 | |
| 119 void InputMethodBridge::DispatchKeyEvent(const ui::KeyEvent& key) { | |
| 120 DCHECK(key.type() == ui::ET_KEY_PRESSED || key.type() == ui::ET_KEY_RELEASED); | |
| 121 | |
| 122 // We can just dispatch the event here since the |key| is already processed by | |
| 123 // the system-wide IME. | |
| 124 DispatchKeyEventPostIME(key); | |
| 125 } | |
| 126 | |
| 127 void InputMethodBridge::OnTextInputTypeChanged(View* view) { | |
| 128 DCHECK(host_); | |
| 129 | |
| 130 if (IsViewFocused(view)) | |
| 131 host_->OnTextInputTypeChanged(this); | |
| 132 InputMethodBase::OnTextInputTypeChanged(view); | |
| 133 } | |
| 134 | |
| 135 void InputMethodBridge::OnCaretBoundsChanged(View* view) { | |
| 136 DCHECK(host_); | |
| 137 | |
| 138 if (IsViewFocused(view) && !IsTextInputTypeNone()) | |
| 139 host_->OnCaretBoundsChanged(this); | |
| 140 } | |
| 141 | |
| 142 void InputMethodBridge::CancelComposition(View* view) { | |
| 143 DCHECK(host_); | |
| 144 | |
| 145 if (IsViewFocused(view)) | |
| 146 host_->CancelComposition(this); | |
| 147 } | |
| 148 | |
| 149 void InputMethodBridge::OnInputLocaleChanged() { | |
| 150 DCHECK(host_); | |
| 151 | |
| 152 host_->OnInputLocaleChanged(); | |
| 153 } | |
| 154 | |
| 155 std::string InputMethodBridge::GetInputLocale() { | |
| 156 DCHECK(host_); | |
| 157 | |
| 158 return host_->GetInputLocale(); | |
| 159 } | |
| 160 | |
| 161 bool InputMethodBridge::IsActive() { | |
| 162 DCHECK(host_); | |
| 163 | |
| 164 return host_->IsActive(); | |
| 165 } | |
| 166 | |
| 167 bool InputMethodBridge::IsCandidatePopupOpen() const { | |
| 168 DCHECK(host_); | |
| 169 | |
| 170 return host_->IsCandidatePopupOpen(); | |
| 171 } | |
| 172 | |
| 173 void InputMethodBridge::ShowImeIfNeeded() { | |
| 174 DCHECK(host_); | |
| 175 host_->ShowImeIfNeeded(); | |
| 176 } | |
| 177 | |
| 178 // Overridden from TextInputClient. Forward an event from the system-wide IME | |
| 179 // to the text input |client|, which is e.g. views::Textfield. | |
| 180 void InputMethodBridge::SetCompositionText( | |
| 181 const ui::CompositionText& composition) { | |
| 182 TextInputClient* client = GetTextInputClient(); | |
| 183 if (client) | |
| 184 client->SetCompositionText(composition); | |
| 185 } | |
| 186 | |
| 187 void InputMethodBridge::ConfirmCompositionText() { | |
| 188 TextInputClient* client = GetTextInputClient(); | |
| 189 if (client) | |
| 190 client->ConfirmCompositionText(); | |
| 191 } | |
| 192 | |
| 193 void InputMethodBridge::ClearCompositionText() { | |
| 194 TextInputClient* client = GetTextInputClient(); | |
| 195 if (client) | |
| 196 client->ClearCompositionText(); | |
| 197 } | |
| 198 | |
| 199 void InputMethodBridge::InsertText(const base::string16& text) { | |
| 200 TextInputClient* client = GetTextInputClient(); | |
| 201 if (client) | |
| 202 client->InsertText(text); | |
| 203 } | |
| 204 | |
| 205 void InputMethodBridge::InsertChar(base::char16 ch, int flags) { | |
| 206 TextInputClient* client = GetTextInputClient(); | |
| 207 if (client) | |
| 208 client->InsertChar(ch, flags); | |
| 209 } | |
| 210 | |
| 211 gfx::NativeWindow InputMethodBridge::GetAttachedWindow() const { | |
| 212 TextInputClient* client = GetTextInputClient(); | |
| 213 return client ? | |
| 214 client->GetAttachedWindow() : static_cast<gfx::NativeWindow>(NULL); | |
| 215 } | |
| 216 | |
| 217 ui::TextInputType InputMethodBridge::GetTextInputType() const { | |
| 218 TextInputClient* client = GetTextInputClient(); | |
| 219 return client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE; | |
| 220 } | |
| 221 | |
| 222 ui::TextInputMode InputMethodBridge::GetTextInputMode() const { | |
| 223 TextInputClient* client = GetTextInputClient(); | |
| 224 return client ? client->GetTextInputMode() : ui::TEXT_INPUT_MODE_DEFAULT; | |
| 225 } | |
| 226 | |
| 227 int InputMethodBridge::GetTextInputFlags() const { | |
| 228 TextInputClient* client = GetTextInputClient(); | |
| 229 return client ? client->GetTextInputFlags() : 0; | |
| 230 } | |
| 231 | |
| 232 bool InputMethodBridge::CanComposeInline() const { | |
| 233 TextInputClient* client = GetTextInputClient(); | |
| 234 return client ? client->CanComposeInline() : true; | |
| 235 } | |
| 236 | |
| 237 gfx::Rect InputMethodBridge::GetCaretBounds() const { | |
| 238 TextInputClient* client = GetTextInputClient(); | |
| 239 if (!client) | |
| 240 return gfx::Rect(); | |
| 241 | |
| 242 return client->GetCaretBounds(); | |
| 243 } | |
| 244 | |
| 245 bool InputMethodBridge::GetCompositionCharacterBounds(uint32 index, | |
| 246 gfx::Rect* rect) const { | |
| 247 DCHECK(rect); | |
| 248 TextInputClient* client = GetTextInputClient(); | |
| 249 if (!client) | |
| 250 return false; | |
| 251 | |
| 252 return client->GetCompositionCharacterBounds(index, rect); | |
| 253 } | |
| 254 | |
| 255 bool InputMethodBridge::HasCompositionText() const { | |
| 256 TextInputClient* client = GetTextInputClient(); | |
| 257 return client ? client->HasCompositionText() : false; | |
| 258 } | |
| 259 | |
| 260 bool InputMethodBridge::GetTextRange(gfx::Range* range) const { | |
| 261 TextInputClient* client = GetTextInputClient(); | |
| 262 return client ? client->GetTextRange(range) : false; | |
| 263 } | |
| 264 | |
| 265 bool InputMethodBridge::GetCompositionTextRange(gfx::Range* range) const { | |
| 266 TextInputClient* client = GetTextInputClient(); | |
| 267 return client ? client->GetCompositionTextRange(range) : false; | |
| 268 } | |
| 269 | |
| 270 bool InputMethodBridge::GetSelectionRange(gfx::Range* range) const { | |
| 271 TextInputClient* client = GetTextInputClient(); | |
| 272 return client ? client->GetSelectionRange(range) : false; | |
| 273 } | |
| 274 | |
| 275 bool InputMethodBridge::SetSelectionRange(const gfx::Range& range) { | |
| 276 TextInputClient* client = GetTextInputClient(); | |
| 277 return client ? client->SetSelectionRange(range) : false; | |
| 278 } | |
| 279 | |
| 280 bool InputMethodBridge::DeleteRange(const gfx::Range& range) { | |
| 281 TextInputClient* client = GetTextInputClient(); | |
| 282 return client ? client->DeleteRange(range) : false; | |
| 283 } | |
| 284 | |
| 285 bool InputMethodBridge::GetTextFromRange(const gfx::Range& range, | |
| 286 base::string16* text) const { | |
| 287 TextInputClient* client = GetTextInputClient(); | |
| 288 return client ? client->GetTextFromRange(range, text) : false; | |
| 289 } | |
| 290 | |
| 291 void InputMethodBridge::OnInputMethodChanged() { | |
| 292 TextInputClient* client = GetTextInputClient(); | |
| 293 if (client) | |
| 294 client->OnInputMethodChanged(); | |
| 295 } | |
| 296 | |
| 297 bool InputMethodBridge::ChangeTextDirectionAndLayoutAlignment( | |
| 298 base::i18n::TextDirection direction) { | |
| 299 TextInputClient* client = GetTextInputClient(); | |
| 300 return client ? | |
| 301 client->ChangeTextDirectionAndLayoutAlignment(direction) : false; | |
| 302 } | |
| 303 | |
| 304 void InputMethodBridge::ExtendSelectionAndDelete(size_t before, size_t after) { | |
| 305 TextInputClient* client = GetTextInputClient(); | |
| 306 if (client) | |
| 307 client->ExtendSelectionAndDelete(before, after); | |
| 308 } | |
| 309 | |
| 310 void InputMethodBridge::EnsureCaretInRect(const gfx::Rect& rect) { | |
| 311 TextInputClient* client = GetTextInputClient(); | |
| 312 if (client) | |
| 313 client->EnsureCaretInRect(rect); | |
| 314 } | |
| 315 | |
| 316 bool InputMethodBridge::IsEditCommandEnabled(int command_id) { | |
| 317 TextInputClient* client = GetTextInputClient(); | |
| 318 return client ? client->IsEditCommandEnabled(command_id) : false; | |
| 319 } | |
| 320 | |
| 321 void InputMethodBridge::SetEditCommandForNextKeyEvent(int command_id) { | |
| 322 TextInputClient* client = GetTextInputClient(); | |
| 323 if (client) | |
| 324 client->SetEditCommandForNextKeyEvent(command_id); | |
| 325 } | |
| 326 | |
| 327 // Overridden from FocusChangeListener. | |
| 328 void InputMethodBridge::OnWillChangeFocus(View* focused_before, View* focused) { | |
| 329 if (HasCompositionText()) { | |
| 330 ConfirmCompositionText(); | |
| 331 CancelComposition(focused_before); | |
| 332 } | |
| 333 } | |
| 334 | |
| 335 void InputMethodBridge::OnDidChangeFocus(View* focused_before, View* focused) { | |
| 336 DCHECK_EQ(GetFocusedView(), focused); | |
| 337 OnTextInputTypeChanged(focused); | |
| 338 OnCaretBoundsChanged(focused); | |
| 339 } | |
| 340 | |
| 341 ui::InputMethod* InputMethodBridge::GetHostInputMethod() const { | |
| 342 return host_; | |
| 343 } | |
| 344 | |
| 345 | |
| 346 } // namespace views | |
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Chromium Code Reviews
Issue 1177503003:
Remove the 2-level input method system & InputMethodBridge. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master