| OLD | NEW |
|---|
| (Empty) |
| 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 "content/browser/renderer_host/gtk_im_context_wrapper.h" | |
| 6 | |
| 7 #include <gdk/gdk.h> | |
| 8 #include <gdk/gdkkeysyms.h> | |
| 9 #include <gtk/gtk.h> | |
| 10 | |
| 11 #include <algorithm> | |
| 12 | |
| 13 #include "base/logging.h" | |
| 14 #include "base/strings/string_util.h" | |
| 15 #include "base/strings/utf_string_conversions.h" | |
| 16 #include "content/browser/renderer_host/render_widget_host_impl.h" | |
| 17 #include "content/browser/renderer_host/render_widget_host_view_gtk.h" | |
| 18 #include "content/public/browser/native_web_keyboard_event.h" | |
| 19 #include "third_party/WebKit/public/web/WebCompositionUnderline.h" | |
| 20 #include "ui/base/ime/composition_text_util_pango.h" | |
| 21 #include "ui/gfx/gtk_util.h" | |
| 22 #include "ui/gfx/rect.h" | |
| 23 | |
| 24 namespace content { | |
| 25 namespace { | |
| 26 | |
| 27 // Copied from third_party/WebKit/Source/WebCore/page/EventHandler.cpp | |
| 28 // | |
| 29 // Match key code of composition keydown event on windows. | |
| 30 // IE sends VK_PROCESSKEY which has value 229; | |
| 31 // | |
| 32 // Please refer to following documents for detals: | |
| 33 // - Virtual-Key Codes | |
| 34 // http://msdn.microsoft.com/en-us/library/ms645540(VS.85).aspx | |
| 35 // - How the IME System Works | |
| 36 // http://msdn.microsoft.com/en-us/library/cc194848.aspx | |
| 37 // - ImmGetVirtualKey Function | |
| 38 // http://msdn.microsoft.com/en-us/library/dd318570(VS.85).aspx | |
| 39 const int kCompositionEventKeyCode = 229; | |
| 40 | |
| 41 } // namespace | |
| 42 | |
| 43 // ui::CompositionUnderline should be identical to | |
| 44 // blink::WebCompositionUnderline, so that we can do reinterpret_cast safely. | |
| 45 // TODO(suzhe): remove it after migrating all code in chrome to use | |
| 46 // ui::CompositionUnderline. | |
| 47 COMPILE_ASSERT(sizeof(ui::CompositionUnderline) == | |
| 48 sizeof(blink::WebCompositionUnderline), | |
| 49 ui_CompositionUnderline__WebKit_WebCompositionUnderline_diff); | |
| 50 | |
| 51 GtkIMContextWrapper::GtkIMContextWrapper(RenderWidgetHostViewGtk* host_view) | |
| 52 : host_view_(host_view), | |
| 53 context_(gtk_im_multicontext_new()), | |
| 54 context_simple_(gtk_im_context_simple_new()), | |
| 55 is_focused_(false), | |
| 56 is_composing_text_(false), | |
| 57 is_enabled_(false), | |
| 58 is_in_key_event_handler_(false), | |
| 59 is_composition_changed_(false), | |
| 60 suppress_next_commit_(false), | |
| 61 last_key_code_(0), | |
| 62 last_key_was_up_(false), | |
| 63 last_key_filtered_no_result_(false) { | |
| 64 DCHECK(context_); | |
| 65 DCHECK(context_simple_); | |
| 66 | |
| 67 // context_ and context_simple_ share the same callback handlers. | |
| 68 // All data come from them are treated equally. | |
| 69 // context_ is for full input method support. | |
| 70 // context_simple_ is for supporting dead/compose keys when input method is | |
| 71 // disabled by webkit, eg. in password input box. | |
| 72 g_signal_connect(context_, "preedit-start", | |
| 73 G_CALLBACK(HandlePreeditStartThunk), this); | |
| 74 g_signal_connect(context_, "preedit-end", | |
| 75 G_CALLBACK(HandlePreeditEndThunk), this); | |
| 76 g_signal_connect(context_, "preedit-changed", | |
| 77 G_CALLBACK(HandlePreeditChangedThunk), this); | |
| 78 g_signal_connect(context_, "commit", | |
| 79 G_CALLBACK(HandleCommitThunk), this); | |
| 80 g_signal_connect(context_, "retrieve-surrounding", | |
| 81 G_CALLBACK(HandleRetrieveSurroundingThunk), this); | |
| 82 | |
| 83 g_signal_connect(context_simple_, "preedit-start", | |
| 84 G_CALLBACK(HandlePreeditStartThunk), this); | |
| 85 g_signal_connect(context_simple_, "preedit-end", | |
| 86 G_CALLBACK(HandlePreeditEndThunk), this); | |
| 87 g_signal_connect(context_simple_, "preedit-changed", | |
| 88 G_CALLBACK(HandlePreeditChangedThunk), this); | |
| 89 g_signal_connect(context_simple_, "commit", | |
| 90 G_CALLBACK(HandleCommitThunk), this); | |
| 91 g_signal_connect(context_simple_, "retrieve-surrounding", | |
| 92 G_CALLBACK(HandleRetrieveSurroundingThunk), this); | |
| 93 | |
| 94 GtkWidget* widget = host_view->GetNativeView(); | |
| 95 DCHECK(widget); | |
| 96 | |
| 97 g_signal_connect(widget, "realize", | |
| 98 G_CALLBACK(HandleHostViewRealizeThunk), this); | |
| 99 g_signal_connect(widget, "unrealize", | |
| 100 G_CALLBACK(HandleHostViewUnrealizeThunk), this); | |
| 101 | |
| 102 // Set client window if the widget is already realized. | |
| 103 HandleHostViewRealize(widget); | |
| 104 } | |
| 105 | |
| 106 GtkIMContextWrapper::~GtkIMContextWrapper() { | |
| 107 if (context_) | |
| 108 g_object_unref(context_); | |
| 109 if (context_simple_) | |
| 110 g_object_unref(context_simple_); | |
| 111 } | |
| 112 | |
| 113 void GtkIMContextWrapper::ProcessKeyEvent(GdkEventKey* event) { | |
| 114 suppress_next_commit_ = false; | |
| 115 | |
| 116 // Indicates preedit-changed and commit signal handlers that we are | |
| 117 // processing a key event. | |
| 118 is_in_key_event_handler_ = true; | |
| 119 // Reset this flag so that we can know if preedit is changed after | |
| 120 // processing this key event. | |
| 121 is_composition_changed_ = false; | |
| 122 // Clear it so that we can know if something needs committing after | |
| 123 // processing this key event. | |
| 124 commit_text_.clear(); | |
| 125 | |
| 126 // According to Document Object Model (DOM) Level 3 Events Specification | |
| 127 // Appendix A: Keyboard events and key identifiers | |
| 128 // http://www.w3.org/TR/DOM-Level-3-Events/keyset.html: | |
| 129 // The event sequence would be: | |
| 130 // 1. keydown | |
| 131 // 2. textInput | |
| 132 // 3. keyup | |
| 133 // | |
| 134 // So keydown must be sent to webkit before sending input method result, | |
| 135 // while keyup must be sent afterwards. | |
| 136 // However on Windows, if a keydown event has been processed by IME, its | |
| 137 // virtual keycode will be changed to VK_PROCESSKEY(0xE5) before being sent | |
| 138 // to application. | |
| 139 // To emulate the windows behavior as much as possible, we need to send the | |
| 140 // key event to the GtkIMContext object first, and decide whether or not to | |
| 141 // send the original key event to webkit according to the result from IME. | |
| 142 // | |
| 143 // If IME is enabled by WebKit, this event will be dispatched to context_ | |
| 144 // to get full IME support. Otherwise it'll be dispatched to | |
| 145 // context_simple_, so that dead/compose keys can still work. | |
| 146 // | |
| 147 // It sends a "commit" signal when it has a character to be inserted | |
| 148 // even when we use a US keyboard so that we can send a Char event | |
| 149 // (or an IME event) to the renderer in our "commit"-signal handler. | |
| 150 // We should send a KeyDown (or a KeyUp) event before dispatching this | |
| 151 // event to the GtkIMContext object (and send a Char event) so that WebKit | |
| 152 // can dispatch the JavaScript events in the following order: onkeydown(), | |
| 153 // onkeypress(), and onkeyup(). (Many JavaScript pages assume this.) | |
| 154 gboolean filtered = false; | |
| 155 if (is_enabled_) { | |
| 156 filtered = gtk_im_context_filter_keypress(context_, event); | |
| 157 } else { | |
| 158 filtered = gtk_im_context_filter_keypress(context_simple_, event); | |
| 159 } | |
| 160 | |
| 161 // Reset this flag here, as it's only used in input method callbacks. | |
| 162 is_in_key_event_handler_ = false; | |
| 163 | |
| 164 NativeWebKeyboardEvent wke(reinterpret_cast<GdkEvent*>(event)); | |
| 165 | |
| 166 // If the key event was handled by the input method, then we need to prevent | |
| 167 // RenderView::UnhandledKeyboardEvent() from processing it. | |
| 168 // Otherwise unexpected result may occur. For example if it's a | |
| 169 // Backspace key event, the browser may go back to previous page. | |
| 170 // We just send all keyup events to the browser to avoid breaking the | |
| 171 // browser's MENU key function, which is actually the only keyup event | |
| 172 // handled in the browser. | |
| 173 if (filtered && event->type == GDK_KEY_PRESS) | |
| 174 wke.skip_in_browser = true; | |
| 175 | |
| 176 const int key_code = wke.windowsKeyCode; | |
| 177 const bool has_result = HasInputMethodResult(); | |
| 178 | |
| 179 // Send filtered keydown event before sending IME result. | |
| 180 // In order to workaround http://crosbug.com/6582, we only send a filtered | |
| 181 // keydown event if it generated any input method result. | |
| 182 if (event->type == GDK_KEY_PRESS && filtered && has_result) | |
| 183 ProcessFilteredKeyPressEvent(&wke); | |
| 184 | |
| 185 // Send IME results. In most cases, it's only available if the key event | |
| 186 // is filtered by IME. But in rare cases, an unfiltered key event may also | |
| 187 // generate IME results. | |
| 188 // Any IME results generated by a unfiltered key down event must be sent | |
| 189 // before the key down event, to avoid some tricky issues. For example, | |
| 190 // when using latin-post input method, pressing 'a' then Backspace, may | |
| 191 // generate following events in sequence: | |
| 192 // 1. keydown 'a' (filtered) | |
| 193 // 2. preedit changed to "a" | |
| 194 // 3. keyup 'a' (unfiltered) | |
| 195 // 4. keydown Backspace (unfiltered) | |
| 196 // 5. commit "a" | |
| 197 // 6. preedit end | |
| 198 // 7. keyup Backspace (unfiltered) | |
| 199 // | |
| 200 // In this case, the input box will be in a strange state if keydown | |
| 201 // Backspace is sent to webkit before commit "a" and preedit end. | |
| 202 if (has_result) | |
| 203 ProcessInputMethodResult(event, filtered); | |
| 204 | |
| 205 // Send unfiltered keydown and keyup events after sending IME result. | |
| 206 if (event->type == GDK_KEY_PRESS && !filtered) { | |
| 207 ProcessUnfilteredKeyPressEvent(&wke); | |
| 208 } else if (event->type == GDK_KEY_RELEASE) { | |
| 209 // In order to workaround http://crosbug.com/6582, we need to suppress | |
| 210 // the keyup event if corresponding keydown event was suppressed, or | |
| 211 // the last key event was a keyup event with the same keycode. | |
| 212 const bool suppress = (last_key_code_ == key_code) && | |
| 213 (last_key_was_up_ || last_key_filtered_no_result_); | |
| 214 | |
| 215 if (!suppress) | |
| 216 host_view_->ForwardKeyboardEvent(wke); | |
| 217 } | |
| 218 | |
| 219 last_key_code_ = key_code; | |
| 220 last_key_was_up_ = (event->type == GDK_KEY_RELEASE); | |
| 221 last_key_filtered_no_result_ = (filtered && !has_result); | |
| 222 } | |
| 223 | |
| 224 void GtkIMContextWrapper::UpdateInputMethodState( | |
| 225 ui::TextInputType type, | |
| 226 bool can_compose_inline) { | |
| 227 suppress_next_commit_ = false; | |
| 228 | |
| 229 // The renderer has updated its IME status. | |
| 230 // Control the GtkIMContext object according to this status. | |
| 231 if (!context_) | |
| 232 return; | |
| 233 | |
| 234 DCHECK(!is_in_key_event_handler_); | |
| 235 | |
| 236 bool is_enabled = (type != ui::TEXT_INPUT_TYPE_NONE && | |
| 237 type != ui::TEXT_INPUT_TYPE_PASSWORD); | |
| 238 if (is_enabled_ != is_enabled) { | |
| 239 is_enabled_ = is_enabled; | |
| 240 if (is_enabled && is_focused_) | |
| 241 gtk_im_context_focus_in(context_); | |
| 242 else | |
| 243 gtk_im_context_focus_out(context_); | |
| 244 } | |
| 245 | |
| 246 if (is_enabled) { | |
| 247 // If the focused element supports inline rendering of composition text, | |
| 248 // we receive and send related events to it. Otherwise, the events related | |
| 249 // to the updates of composition text are directed to the candidate window. | |
| 250 gtk_im_context_set_use_preedit(context_, can_compose_inline); | |
| 251 } | |
| 252 } | |
| 253 | |
| 254 void GtkIMContextWrapper::UpdateCaretBounds( | |
| 255 const gfx::Rect& caret_bounds) { | |
| 256 if (is_enabled_) { | |
| 257 // Updates the position of the IME candidate window. | |
| 258 // The position sent from the renderer is a relative one, so we need to | |
| 259 // attach the GtkIMContext object to this window before changing the | |
| 260 // position. | |
| 261 GdkRectangle cursor_rect(caret_bounds.ToGdkRectangle()); | |
| 262 gtk_im_context_set_cursor_location(context_, &cursor_rect); | |
| 263 } | |
| 264 } | |
| 265 | |
| 266 void GtkIMContextWrapper::OnFocusIn() { | |
| 267 if (is_focused_) | |
| 268 return; | |
| 269 | |
| 270 // Tracks the focused state so that we can give focus to the | |
| 271 // GtkIMContext object correctly later when IME is enabled by WebKit. | |
| 272 is_focused_ = true; | |
| 273 | |
| 274 last_key_code_ = 0; | |
| 275 last_key_was_up_ = false; | |
| 276 last_key_filtered_no_result_ = false; | |
| 277 | |
| 278 // Notify the GtkIMContext object of this focus-in event only if IME is | |
| 279 // enabled by WebKit. | |
| 280 if (is_enabled_) | |
| 281 gtk_im_context_focus_in(context_); | |
| 282 | |
| 283 // context_simple_ is always enabled. | |
| 284 // Actually it doesn't care focus state at all. | |
| 285 gtk_im_context_focus_in(context_simple_); | |
| 286 | |
| 287 // Enables RenderWidget's IME related events, so that we can be notified | |
| 288 // when WebKit wants to enable or disable IME. | |
| 289 if (host_view_->GetRenderWidgetHost()) { | |
| 290 RenderWidgetHostImpl::From( | |
| 291 host_view_->GetRenderWidgetHost())->SetInputMethodActive(true); | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 void GtkIMContextWrapper::OnFocusOut() { | |
| 296 if (!is_focused_) | |
| 297 return; | |
| 298 | |
| 299 // Tracks the focused state so that we won't give focus to the | |
| 300 // GtkIMContext object unexpectly. | |
| 301 is_focused_ = false; | |
| 302 | |
| 303 // Notify the GtkIMContext object of this focus-out event only if IME is | |
| 304 // enabled by WebKit. | |
| 305 if (is_enabled_) { | |
| 306 // To reset the GtkIMContext object and prevent data loss. | |
| 307 ConfirmComposition(); | |
| 308 gtk_im_context_focus_out(context_); | |
| 309 } | |
| 310 | |
| 311 // To make sure it'll be in correct state when focused in again. | |
| 312 gtk_im_context_reset(context_simple_); | |
| 313 gtk_im_context_focus_out(context_simple_); | |
| 314 | |
| 315 is_composing_text_ = false; | |
| 316 | |
| 317 // Disable RenderWidget's IME related events to save bandwidth. | |
| 318 if (host_view_->GetRenderWidgetHost()) { | |
| 319 RenderWidgetHostImpl::From( | |
| 320 host_view_->GetRenderWidgetHost())->SetInputMethodActive(false); | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 GtkWidget* GtkIMContextWrapper::BuildInputMethodsGtkMenu() { | |
| 325 GtkWidget* submenu = gtk_menu_new(); | |
| 326 gtk_im_multicontext_append_menuitems(GTK_IM_MULTICONTEXT(context_), | |
| 327 GTK_MENU_SHELL(submenu)); | |
| 328 return submenu; | |
| 329 } | |
| 330 | |
| 331 void GtkIMContextWrapper::CancelComposition() { | |
| 332 if (!is_enabled_) | |
| 333 return; | |
| 334 | |
| 335 DCHECK(!is_in_key_event_handler_); | |
| 336 | |
| 337 // To prevent any text from being committed when resetting the |context_|; | |
| 338 is_in_key_event_handler_ = true; | |
| 339 suppress_next_commit_ = true; | |
| 340 | |
| 341 gtk_im_context_reset(context_); | |
| 342 gtk_im_context_reset(context_simple_); | |
| 343 | |
| 344 if (is_focused_) { | |
| 345 // Some input methods may not honour the reset call. Focusing out/in the | |
| 346 // |context_| to make sure it gets reset correctly. | |
| 347 gtk_im_context_focus_out(context_); | |
| 348 gtk_im_context_focus_in(context_); | |
| 349 } | |
| 350 | |
| 351 is_composing_text_ = false; | |
| 352 composition_.Clear(); | |
| 353 commit_text_.clear(); | |
| 354 | |
| 355 is_in_key_event_handler_ = false; | |
| 356 } | |
| 357 | |
| 358 bool GtkIMContextWrapper::NeedCommitByForwardingCharEvent() const { | |
| 359 // If there is no composition text and has only one character to be | |
| 360 // committed, then the character will be send to webkit as a Char event | |
| 361 // instead of a confirmed composition text. | |
| 362 // It should be fine to handle BMP character only, as non-BMP characters | |
| 363 // can always be committed as confirmed composition text. | |
| 364 return !is_composing_text_ && commit_text_.length() == 1; | |
| 365 } | |
| 366 | |
| 367 bool GtkIMContextWrapper::HasInputMethodResult() const { | |
| 368 return commit_text_.length() || is_composition_changed_; | |
| 369 } | |
| 370 | |
| 371 void GtkIMContextWrapper::ProcessFilteredKeyPressEvent( | |
| 372 NativeWebKeyboardEvent* wke) { | |
| 373 // If IME has filtered this event, then replace virtual key code with | |
| 374 // VK_PROCESSKEY. See comment in ProcessKeyEvent() for details. | |
| 375 // It's only required for keydown events. | |
| 376 // To emulate windows behavior, when input method is enabled, if the commit | |
| 377 // text can be emulated by a Char event, then don't do this replacement. | |
| 378 if (!NeedCommitByForwardingCharEvent()) { | |
| 379 wke->windowsKeyCode = kCompositionEventKeyCode; | |
| 380 // keyidentifier must be updated accordingly, otherwise this key event may | |
| 381 // still be processed by webkit. | |
| 382 wke->setKeyIdentifierFromWindowsKeyCode(); | |
| 383 } | |
| 384 host_view_->ForwardKeyboardEvent(*wke); | |
| 385 } | |
| 386 | |
| 387 void GtkIMContextWrapper::ProcessUnfilteredKeyPressEvent( | |
| 388 NativeWebKeyboardEvent* wke) { | |
| 389 // Send keydown event as it, because it's not filtered by IME. | |
| 390 host_view_->ForwardKeyboardEvent(*wke); | |
| 391 | |
| 392 // IME is disabled by WebKit or the GtkIMContext object cannot handle | |
| 393 // this key event. | |
| 394 // This case is caused by two reasons: | |
| 395 // 1. The given key event is a control-key event, (e.g. return, page up, | |
| 396 // page down, tab, arrows, etc.) or; | |
| 397 // 2. The given key event is not a control-key event but printable | |
| 398 // characters aren't assigned to the event, (e.g. alt+d, etc.) | |
| 399 // Create a Char event manually from this key event and send it to the | |
| 400 // renderer when this Char event contains a printable character which | |
| 401 // should be processed by WebKit. | |
| 402 // isSystemKey will be set to true if this key event has Alt modifier, | |
| 403 // see WebInputEventFactory::keyboardEvent() for details. | |
| 404 if (wke->text[0]) { | |
| 405 wke->type = blink::WebInputEvent::Char; | |
| 406 wke->skip_in_browser = true; | |
| 407 host_view_->ForwardKeyboardEvent(*wke); | |
| 408 } | |
| 409 } | |
| 410 | |
| 411 void GtkIMContextWrapper::ProcessInputMethodResult(const GdkEventKey* event, | |
| 412 bool filtered) { | |
| 413 RenderWidgetHostImpl* host = RenderWidgetHostImpl::From( | |
| 414 host_view_->GetRenderWidgetHost()); | |
| 415 if (!host) | |
| 416 return; | |
| 417 | |
| 418 bool committed = false; | |
| 419 // We do commit before preedit change, so that we can optimize some | |
| 420 // unnecessary preedit changes. | |
| 421 if (commit_text_.length()) { | |
| 422 if (filtered && NeedCommitByForwardingCharEvent()) { | |
| 423 // Send a Char event when we input a composed character without IMEs | |
| 424 // so that this event is to be dispatched to onkeypress() handlers, | |
| 425 // autofill, etc. | |
| 426 // Only commit text generated by a filtered key down event can be sent | |
| 427 // as a Char event, because a unfiltered key down event will probably | |
| 428 // generate another Char event. | |
| 429 // TODO(james.su@gmail.com): Is it necessary to support non BMP chars | |
| 430 // here? | |
| 431 NativeWebKeyboardEvent char_event(commit_text_[0], | |
| 432 event->state, | |
| 433 base::Time::Now().ToDoubleT()); | |
| 434 char_event.skip_in_browser = true; | |
| 435 host_view_->ForwardKeyboardEvent(char_event); | |
| 436 } else { | |
| 437 committed = true; | |
| 438 // Send an IME event. | |
| 439 // Unlike a Char event, an IME event is NOT dispatched to onkeypress() | |
| 440 // handlers or autofill. | |
| 441 host->ImeConfirmComposition( | |
| 442 commit_text_,gfx::Range::InvalidRange(),false); | |
| 443 // Set this flag to false, as this composition session has been | |
| 444 // finished. | |
| 445 is_composing_text_ = false; | |
| 446 } | |
| 447 } | |
| 448 | |
| 449 // Send preedit text only if it's changed. | |
| 450 // If a text has been committed, then we don't need to send the empty | |
| 451 // preedit text again. | |
| 452 if (is_composition_changed_) { | |
| 453 if (composition_.text.length()) { | |
| 454 // Another composition session has been started. | |
| 455 is_composing_text_ = true; | |
| 456 // TODO(suzhe): convert both renderer_host and renderer to use | |
| 457 // ui::CompositionText. | |
| 458 const std::vector<blink::WebCompositionUnderline>& underlines = | |
| 459 reinterpret_cast<const std::vector<blink::WebCompositionUnderline>&>( | |
| 460 composition_.underlines); | |
| 461 host->ImeSetComposition(composition_.text, underlines, | |
| 462 composition_.selection.start(), | |
| 463 composition_.selection.end()); | |
| 464 } else if (!committed) { | |
| 465 host->ImeCancelComposition(); | |
| 466 } | |
| 467 } | |
| 468 } | |
| 469 | |
| 470 void GtkIMContextWrapper::ConfirmComposition() { | |
| 471 if (!is_enabled_) | |
| 472 return; | |
| 473 | |
| 474 DCHECK(!is_in_key_event_handler_); | |
| 475 | |
| 476 if (is_composing_text_) { | |
| 477 if (host_view_->GetRenderWidgetHost()) { | |
| 478 RenderWidgetHostImpl::From( | |
| 479 host_view_->GetRenderWidgetHost())->ImeConfirmComposition( | |
| 480 base::string16(), gfx::Range::InvalidRange(), false); | |
| 481 } | |
| 482 | |
| 483 // Reset the input method. | |
| 484 CancelComposition(); | |
| 485 } | |
| 486 } | |
| 487 | |
| 488 void GtkIMContextWrapper::HandleCommit(const base::string16& text) { | |
| 489 if (suppress_next_commit_) | |
| 490 return; | |
| 491 | |
| 492 // Append the text to the buffer, because commit signal might be fired | |
| 493 // multiple times when processing a key event. | |
| 494 commit_text_.append(text); | |
| 495 // Nothing needs to do, if it's currently in ProcessKeyEvent() | |
| 496 // handler, which will send commit text to webkit later. Otherwise, | |
| 497 // we need send it here. | |
| 498 // It's possible that commit signal is fired without a key event, for | |
| 499 // example when user input via a voice or handwriting recognition software. | |
| 500 // In this case, the text must be committed directly. | |
| 501 if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) { | |
| 502 // Workaround http://crbug.com/45478 by sending fake key down/up events. | |
| 503 SendFakeCompositionKeyEvent(blink::WebInputEvent::RawKeyDown); | |
| 504 RenderWidgetHostImpl::From( | |
| 505 host_view_->GetRenderWidgetHost())->ImeConfirmComposition( | |
| 506 text, gfx::Range::InvalidRange(), false); | |
| 507 SendFakeCompositionKeyEvent(blink::WebInputEvent::KeyUp); | |
| 508 } | |
| 509 } | |
| 510 | |
| 511 void GtkIMContextWrapper::HandlePreeditStart() { | |
| 512 // Ignore preedit related signals triggered by CancelComposition() method. | |
| 513 if (suppress_next_commit_) | |
| 514 return; | |
| 515 is_composing_text_ = true; | |
| 516 } | |
| 517 | |
| 518 void GtkIMContextWrapper::HandlePreeditChanged(const gchar* text, | |
| 519 PangoAttrList* attrs, | |
| 520 int cursor_position) { | |
| 521 // Ignore preedit related signals triggered by CancelComposition() method. | |
| 522 if (suppress_next_commit_) | |
| 523 return; | |
| 524 | |
| 525 // Don't set is_composition_changed_ to false if there is no change, because | |
| 526 // this handler might be called multiple times with the same data. | |
| 527 is_composition_changed_ = true; | |
| 528 composition_.Clear(); | |
| 529 | |
| 530 ui::ExtractCompositionTextFromGtkPreedit(text, attrs, cursor_position, | |
| 531 &composition_); | |
| 532 | |
| 533 // TODO(suzhe): due to a bug of webkit, we currently can't use selection range | |
| 534 // with composition string. See: https://bugs.webkit.org/show_bug.cgi?id=40805 | |
| 535 composition_.selection = gfx::Range(cursor_position); | |
| 536 | |
| 537 // In case we are using a buggy input method which doesn't fire | |
| 538 // "preedit_start" signal. | |
| 539 if (composition_.text.length()) | |
| 540 is_composing_text_ = true; | |
| 541 | |
| 542 // Nothing needs to do, if it's currently in ProcessKeyEvent() | |
| 543 // handler, which will send preedit text to webkit later. | |
| 544 // Otherwise, we need send it here if it's been changed. | |
| 545 if (!is_in_key_event_handler_ && is_composing_text_ && | |
| 546 host_view_->GetRenderWidgetHost()) { | |
| 547 // Workaround http://crbug.com/45478 by sending fake key down/up events. | |
| 548 SendFakeCompositionKeyEvent(blink::WebInputEvent::RawKeyDown); | |
| 549 // TODO(suzhe): convert both renderer_host and renderer to use | |
| 550 // ui::CompositionText. | |
| 551 const std::vector<blink::WebCompositionUnderline>& underlines = | |
| 552 reinterpret_cast<const std::vector<blink::WebCompositionUnderline>&>( | |
| 553 composition_.underlines); | |
| 554 RenderWidgetHostImpl::From( | |
| 555 host_view_->GetRenderWidgetHost())->ImeSetComposition( | |
| 556 composition_.text, underlines, composition_.selection.start(), | |
| 557 composition_.selection.end()); | |
| 558 SendFakeCompositionKeyEvent(blink::WebInputEvent::KeyUp); | |
| 559 } | |
| 560 } | |
| 561 | |
| 562 void GtkIMContextWrapper::HandlePreeditEnd() { | |
| 563 if (composition_.text.length()) { | |
| 564 // The composition session has been finished. | |
| 565 composition_.Clear(); | |
| 566 is_composition_changed_ = true; | |
| 567 | |
| 568 // If there is still a preedit text when firing "preedit-end" signal, | |
| 569 // we need inform webkit to clear it. | |
| 570 // It's only necessary when it's not in ProcessKeyEvent (). | |
| 571 if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) { | |
| 572 RenderWidgetHostImpl::From( | |
| 573 host_view_->GetRenderWidgetHost())->ImeCancelComposition(); | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 // Don't set is_composing_text_ to false here, because "preedit_end" | |
| 578 // signal may be fired before "commit" signal. | |
| 579 } | |
| 580 | |
| 581 gboolean GtkIMContextWrapper::HandleRetrieveSurrounding(GtkIMContext* context) { | |
| 582 if (!is_enabled_) | |
| 583 return TRUE; | |
| 584 | |
| 585 std::string text; | |
| 586 size_t cursor_index = 0; | |
| 587 | |
| 588 if (!is_enabled_ || !host_view_->RetrieveSurrounding(&text, &cursor_index)) { | |
| 589 gtk_im_context_set_surrounding(context, "", 0, 0); | |
| 590 return TRUE; | |
| 591 } | |
| 592 | |
| 593 gtk_im_context_set_surrounding(context, text.c_str(), text.length(), | |
| 594 cursor_index); | |
| 595 | |
| 596 return TRUE; | |
| 597 } | |
| 598 | |
| 599 void GtkIMContextWrapper::HandleHostViewRealize(GtkWidget* widget) { | |
| 600 // We should only set im context's client window once, because when setting | |
| 601 // client window.im context may destroy and recreate its internal states and | |
| 602 // objects. | |
| 603 GdkWindow* gdk_window = gtk_widget_get_window(widget); | |
| 604 if (gdk_window) { | |
| 605 gtk_im_context_set_client_window(context_, gdk_window); | |
| 606 gtk_im_context_set_client_window(context_simple_, gdk_window); | |
| 607 } | |
| 608 } | |
| 609 | |
| 610 void GtkIMContextWrapper::HandleHostViewUnrealize() { | |
| 611 gtk_im_context_set_client_window(context_, NULL); | |
| 612 gtk_im_context_set_client_window(context_simple_, NULL); | |
| 613 } | |
| 614 | |
| 615 void GtkIMContextWrapper::SendFakeCompositionKeyEvent( | |
| 616 blink::WebInputEvent::Type type) { | |
| 617 NativeWebKeyboardEvent fake_event; | |
| 618 fake_event.windowsKeyCode = kCompositionEventKeyCode; | |
| 619 fake_event.skip_in_browser = true; | |
| 620 fake_event.type = type; | |
| 621 host_view_->ForwardKeyboardEvent(fake_event); | |
| 622 } | |
| 623 | |
| 624 void GtkIMContextWrapper::HandleCommitThunk( | |
| 625 GtkIMContext* context, gchar* text, GtkIMContextWrapper* self) { | |
| 626 self->HandleCommit(base::UTF8ToUTF16(text)); | |
| 627 } | |
| 628 | |
| 629 void GtkIMContextWrapper::HandlePreeditStartThunk( | |
| 630 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 631 self->HandlePreeditStart(); | |
| 632 } | |
| 633 | |
| 634 void GtkIMContextWrapper::HandlePreeditChangedThunk( | |
| 635 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 636 gchar* text = NULL; | |
| 637 PangoAttrList* attrs = NULL; | |
| 638 gint cursor_position = 0; | |
| 639 gtk_im_context_get_preedit_string(context, &text, &attrs, &cursor_position); | |
| 640 self->HandlePreeditChanged(text, attrs, cursor_position); | |
| 641 g_free(text); | |
| 642 pango_attr_list_unref(attrs); | |
| 643 } | |
| 644 | |
| 645 void GtkIMContextWrapper::HandlePreeditEndThunk( | |
| 646 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 647 self->HandlePreeditEnd(); | |
| 648 } | |
| 649 | |
| 650 gboolean GtkIMContextWrapper::HandleRetrieveSurroundingThunk( | |
| 651 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 652 return self->HandleRetrieveSurrounding(context); | |
| 653 } | |
| 654 | |
| 655 void GtkIMContextWrapper::HandleHostViewRealizeThunk( | |
| 656 GtkWidget* widget, GtkIMContextWrapper* self) { | |
| 657 self->HandleHostViewRealize(widget); | |
| 658 } | |
| 659 | |
| 660 void GtkIMContextWrapper::HandleHostViewUnrealizeThunk( | |
| 661 GtkWidget* widget, GtkIMContextWrapper* self) { | |
| 662 self->HandleHostViewUnrealize(); | |
| 663 } | |
| 664 | |
| 665 } // namespace content | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 231733005:
Delete the GTK+ port of Chrome. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src