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| 1 // Copyright (c) 2011 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 "chrome/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/string_util.h" | |
| 15 #include "base/third_party/icu/icu_utf.h" | |
| 16 #include "base/utf_string_conversions.h" | |
| 17 #include "chrome/app/chrome_command_ids.h" | |
| 18 #include "chrome/browser/ui/gtk/gtk_util.h" | |
| 19 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h" | |
| 20 #include "chrome/common/render_messages.h" | |
| 21 #include "content/browser/renderer_host/render_widget_host.h" | |
| 22 #include "content/common/native_web_keyboard_event.h" | |
| 23 #include "grit/generated_resources.h" | |
| 24 #include "third_party/skia/include/core/SkColor.h" | |
| 25 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositionUnderli
ne.h" | |
| 26 #include "ui/base/gtk/gtk_im_context_util.h" | |
| 27 #include "ui/base/l10n/l10n_util.h" | |
| 28 #include "ui/gfx/gtk_util.h" | |
| 29 #include "ui/gfx/rect.h" | |
| 30 | |
| 31 #if !defined(TOOLKIT_VIEWS) | |
| 32 #include "chrome/browser/ui/gtk/menu_gtk.h" | |
| 33 #endif | |
| 34 | |
| 35 namespace { | |
| 36 // Copied from third_party/WebKit/Source/WebCore/page/EventHandler.cpp | |
| 37 // | |
| 38 // Match key code of composition keydown event on windows. | |
| 39 // IE sends VK_PROCESSKEY which has value 229; | |
| 40 // | |
| 41 // Please refer to following documents for detals: | |
| 42 // - Virtual-Key Codes | |
| 43 // http://msdn.microsoft.com/en-us/library/ms645540(VS.85).aspx | |
| 44 // - How the IME System Works | |
| 45 // http://msdn.microsoft.com/en-us/library/cc194848.aspx | |
| 46 // - ImmGetVirtualKey Function | |
| 47 // http://msdn.microsoft.com/en-us/library/dd318570(VS.85).aspx | |
| 48 const int kCompositionEventKeyCode = 229; | |
| 49 } // namespace | |
| 50 | |
| 51 // ui::CompositionUnderline should be identical to | |
| 52 // WebKit::WebCompositionUnderline, so that we can do reinterpret_cast safely. | |
| 53 // TODO(suzhe): remove it after migrating all code in chrome to use | |
| 54 // ui::CompositionUnderline. | |
| 55 COMPILE_ASSERT(sizeof(ui::CompositionUnderline) == | |
| 56 sizeof(WebKit::WebCompositionUnderline), | |
| 57 ui_CompositionUnderline__WebKit_WebCompositionUnderline_diff); | |
| 58 | |
| 59 GtkIMContextWrapper::GtkIMContextWrapper(RenderWidgetHostViewGtk* host_view) | |
| 60 : host_view_(host_view), | |
| 61 context_(gtk_im_multicontext_new()), | |
| 62 context_simple_(gtk_im_context_simple_new()), | |
| 63 is_focused_(false), | |
| 64 is_composing_text_(false), | |
| 65 is_enabled_(false), | |
| 66 is_in_key_event_handler_(false), | |
| 67 is_composition_changed_(false), | |
| 68 suppress_next_commit_(false), | |
| 69 last_key_code_(0), | |
| 70 last_key_was_up_(false), | |
| 71 last_key_filtered_no_result_(false) { | |
| 72 DCHECK(context_); | |
| 73 DCHECK(context_simple_); | |
| 74 | |
| 75 // context_ and context_simple_ share the same callback handlers. | |
| 76 // All data come from them are treated equally. | |
| 77 // context_ is for full input method support. | |
| 78 // context_simple_ is for supporting dead/compose keys when input method is | |
| 79 // disabled by webkit, eg. in password input box. | |
| 80 g_signal_connect(context_, "preedit_start", | |
| 81 G_CALLBACK(HandlePreeditStartThunk), this); | |
| 82 g_signal_connect(context_, "preedit_end", | |
| 83 G_CALLBACK(HandlePreeditEndThunk), this); | |
| 84 g_signal_connect(context_, "preedit_changed", | |
| 85 G_CALLBACK(HandlePreeditChangedThunk), this); | |
| 86 g_signal_connect(context_, "commit", | |
| 87 G_CALLBACK(HandleCommitThunk), this); | |
| 88 | |
| 89 g_signal_connect(context_simple_, "preedit_start", | |
| 90 G_CALLBACK(HandlePreeditStartThunk), this); | |
| 91 g_signal_connect(context_simple_, "preedit_end", | |
| 92 G_CALLBACK(HandlePreeditEndThunk), this); | |
| 93 g_signal_connect(context_simple_, "preedit_changed", | |
| 94 G_CALLBACK(HandlePreeditChangedThunk), this); | |
| 95 g_signal_connect(context_simple_, "commit", | |
| 96 G_CALLBACK(HandleCommitThunk), this); | |
| 97 | |
| 98 GtkWidget* widget = host_view->native_view(); | |
| 99 DCHECK(widget); | |
| 100 | |
| 101 g_signal_connect(widget, "realize", | |
| 102 G_CALLBACK(HandleHostViewRealizeThunk), this); | |
| 103 g_signal_connect(widget, "unrealize", | |
| 104 G_CALLBACK(HandleHostViewUnrealizeThunk), this); | |
| 105 | |
| 106 // Set client window if the widget is already realized. | |
| 107 HandleHostViewRealize(widget); | |
| 108 } | |
| 109 | |
| 110 GtkIMContextWrapper::~GtkIMContextWrapper() { | |
| 111 if (context_) | |
| 112 g_object_unref(context_); | |
| 113 if (context_simple_) | |
| 114 g_object_unref(context_simple_); | |
| 115 } | |
| 116 | |
| 117 void GtkIMContextWrapper::ProcessKeyEvent(GdkEventKey* event) { | |
| 118 suppress_next_commit_ = false; | |
| 119 | |
| 120 // Indicates preedit-changed and commit signal handlers that we are | |
| 121 // processing a key event. | |
| 122 is_in_key_event_handler_ = true; | |
| 123 // Reset this flag so that we can know if preedit is changed after | |
| 124 // processing this key event. | |
| 125 is_composition_changed_ = false; | |
| 126 // Clear it so that we can know if something needs committing after | |
| 127 // processing this key event. | |
| 128 commit_text_.clear(); | |
| 129 | |
| 130 // According to Document Object Model (DOM) Level 3 Events Specification | |
| 131 // Appendix A: Keyboard events and key identifiers | |
| 132 // http://www.w3.org/TR/DOM-Level-3-Events/keyset.html: | |
| 133 // The event sequence would be: | |
| 134 // 1. keydown | |
| 135 // 2. textInput | |
| 136 // 3. keyup | |
| 137 // | |
| 138 // So keydown must be sent to webkit before sending input method result, | |
| 139 // while keyup must be sent afterwards. | |
| 140 // However on Windows, if a keydown event has been processed by IME, its | |
| 141 // virtual keycode will be changed to VK_PROCESSKEY(0xE5) before being sent | |
| 142 // to application. | |
| 143 // To emulate the windows behavior as much as possible, we need to send the | |
| 144 // key event to the GtkIMContext object first, and decide whether or not to | |
| 145 // send the original key event to webkit according to the result from IME. | |
| 146 // | |
| 147 // If IME is enabled by WebKit, this event will be dispatched to context_ | |
| 148 // to get full IME support. Otherwise it'll be dispatched to | |
| 149 // context_simple_, so that dead/compose keys can still work. | |
| 150 // | |
| 151 // It sends a "commit" signal when it has a character to be inserted | |
| 152 // even when we use a US keyboard so that we can send a Char event | |
| 153 // (or an IME event) to the renderer in our "commit"-signal handler. | |
| 154 // We should send a KeyDown (or a KeyUp) event before dispatching this | |
| 155 // event to the GtkIMContext object (and send a Char event) so that WebKit | |
| 156 // can dispatch the JavaScript events in the following order: onkeydown(), | |
| 157 // onkeypress(), and onkeyup(). (Many JavaScript pages assume this.) | |
| 158 gboolean filtered = false; | |
| 159 if (is_enabled_) { | |
| 160 filtered = gtk_im_context_filter_keypress(context_, event); | |
| 161 } else { | |
| 162 filtered = gtk_im_context_filter_keypress(context_simple_, event); | |
| 163 } | |
| 164 | |
| 165 // Reset this flag here, as it's only used in input method callbacks. | |
| 166 is_in_key_event_handler_ = false; | |
| 167 | |
| 168 NativeWebKeyboardEvent wke(event); | |
| 169 | |
| 170 // If the key event was handled by the input method, then we need to prevent | |
| 171 // RenderView::UnhandledKeyboardEvent() from processing it. | |
| 172 // Otherwise unexpected result may occur. For example if it's a | |
| 173 // Backspace key event, the browser may go back to previous page. | |
| 174 // We just send all keyup events to the browser to avoid breaking the | |
| 175 // browser's MENU key function, which is actually the only keyup event | |
| 176 // handled in the browser. | |
| 177 if (filtered && event->type == GDK_KEY_PRESS) | |
| 178 wke.skip_in_browser = true; | |
| 179 | |
| 180 const int key_code = wke.windowsKeyCode; | |
| 181 const bool has_result = HasInputMethodResult(); | |
| 182 | |
| 183 // Send filtered keydown event before sending IME result. | |
| 184 // In order to workaround http://crosbug.com/6582, we only send a filtered | |
| 185 // keydown event if it generated any input method result. | |
| 186 if (event->type == GDK_KEY_PRESS && filtered && has_result) | |
| 187 ProcessFilteredKeyPressEvent(&wke); | |
| 188 | |
| 189 // Send IME results. In most cases, it's only available if the key event | |
| 190 // is filtered by IME. But in rare cases, an unfiltered key event may also | |
| 191 // generate IME results. | |
| 192 // Any IME results generated by a unfiltered key down event must be sent | |
| 193 // before the key down event, to avoid some tricky issues. For example, | |
| 194 // when using latin-post input method, pressing 'a' then Backspace, may | |
| 195 // generate following events in sequence: | |
| 196 // 1. keydown 'a' (filtered) | |
| 197 // 2. preedit changed to "a" | |
| 198 // 3. keyup 'a' (unfiltered) | |
| 199 // 4. keydown Backspace (unfiltered) | |
| 200 // 5. commit "a" | |
| 201 // 6. preedit end | |
| 202 // 7. keyup Backspace (unfiltered) | |
| 203 // | |
| 204 // In this case, the input box will be in a strange state if keydown | |
| 205 // Backspace is sent to webkit before commit "a" and preedit end. | |
| 206 if (has_result) | |
| 207 ProcessInputMethodResult(event, filtered); | |
| 208 | |
| 209 // Send unfiltered keydown and keyup events after sending IME result. | |
| 210 if (event->type == GDK_KEY_PRESS && !filtered) { | |
| 211 ProcessUnfilteredKeyPressEvent(&wke); | |
| 212 } else if (event->type == GDK_KEY_RELEASE) { | |
| 213 // In order to workaround http://crosbug.com/6582, we need to suppress | |
| 214 // the keyup event if corresponding keydown event was suppressed, or | |
| 215 // the last key event was a keyup event with the same keycode. | |
| 216 const bool suppress = (last_key_code_ == key_code) && | |
| 217 (last_key_was_up_ || last_key_filtered_no_result_); | |
| 218 | |
| 219 if (!suppress) | |
| 220 host_view_->ForwardKeyboardEvent(wke); | |
| 221 } | |
| 222 | |
| 223 last_key_code_ = key_code; | |
| 224 last_key_was_up_ = (event->type == GDK_KEY_RELEASE); | |
| 225 last_key_filtered_no_result_ = (filtered && !has_result); | |
| 226 } | |
| 227 | |
| 228 void GtkIMContextWrapper::UpdateInputMethodState( | |
| 229 ui::TextInputType type, | |
| 230 bool can_compose_inline, | |
| 231 const gfx::Rect& caret_rect) { | |
| 232 suppress_next_commit_ = false; | |
| 233 | |
| 234 // The renderer has updated its IME status. | |
| 235 // Control the GtkIMContext object according to this status. | |
| 236 if (!context_ || !is_focused_) | |
| 237 return; | |
| 238 | |
| 239 DCHECK(!is_in_key_event_handler_); | |
| 240 | |
| 241 bool is_enabled = (type != ui::TEXT_INPUT_TYPE_NONE && | |
| 242 type != ui::TEXT_INPUT_TYPE_PASSWORD); | |
| 243 if (is_enabled_ != is_enabled) { | |
| 244 is_enabled_ = is_enabled; | |
| 245 if (is_enabled) | |
| 246 gtk_im_context_focus_in(context_); | |
| 247 else | |
| 248 gtk_im_context_focus_out(context_); | |
| 249 } | |
| 250 | |
| 251 if (is_enabled) { | |
| 252 // If the focused element supports inline rendering of composition text, | |
| 253 // we receive and send related events to it. Otherwise, the events related | |
| 254 // to the updates of composition text are directed to the candidate window. | |
| 255 gtk_im_context_set_use_preedit(context_, can_compose_inline); | |
| 256 // Updates the position of the IME candidate window. | |
| 257 // The position sent from the renderer is a relative one, so we need to | |
| 258 // attach the GtkIMContext object to this window before changing the | |
| 259 // position. | |
| 260 GdkRectangle cursor_rect(caret_rect.ToGdkRectangle()); | |
| 261 gtk_im_context_set_cursor_location(context_, &cursor_rect); | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 void GtkIMContextWrapper::OnFocusIn() { | |
| 266 if (is_focused_) | |
| 267 return; | |
| 268 | |
| 269 // Tracks the focused state so that we can give focus to the | |
| 270 // GtkIMContext object correctly later when IME is enabled by WebKit. | |
| 271 is_focused_ = true; | |
| 272 | |
| 273 last_key_code_ = 0; | |
| 274 last_key_was_up_ = false; | |
| 275 last_key_filtered_no_result_ = false; | |
| 276 | |
| 277 // Notify the GtkIMContext object of this focus-in event only if IME is | |
| 278 // enabled by WebKit. | |
| 279 if (is_enabled_) | |
| 280 gtk_im_context_focus_in(context_); | |
| 281 | |
| 282 // context_simple_ is always enabled. | |
| 283 // Actually it doesn't care focus state at all. | |
| 284 gtk_im_context_focus_in(context_simple_); | |
| 285 | |
| 286 // Enables RenderWidget's IME related events, so that we can be notified | |
| 287 // when WebKit wants to enable or disable IME. | |
| 288 if (host_view_->GetRenderWidgetHost()) | |
| 289 host_view_->GetRenderWidgetHost()->SetInputMethodActive(true); | |
| 290 } | |
| 291 | |
| 292 void GtkIMContextWrapper::OnFocusOut() { | |
| 293 if (!is_focused_) | |
| 294 return; | |
| 295 | |
| 296 // Tracks the focused state so that we won't give focus to the | |
| 297 // GtkIMContext object unexpectly. | |
| 298 is_focused_ = false; | |
| 299 | |
| 300 // Notify the GtkIMContext object of this focus-out event only if IME is | |
| 301 // enabled by WebKit. | |
| 302 if (is_enabled_) { | |
| 303 // To reset the GtkIMContext object and prevent data loss. | |
| 304 ConfirmComposition(); | |
| 305 gtk_im_context_focus_out(context_); | |
| 306 } | |
| 307 | |
| 308 // To make sure it'll be in correct state when focused in again. | |
| 309 gtk_im_context_reset(context_simple_); | |
| 310 gtk_im_context_focus_out(context_simple_); | |
| 311 | |
| 312 is_composing_text_ = false; | |
| 313 | |
| 314 // Disable RenderWidget's IME related events to save bandwidth. | |
| 315 if (host_view_->GetRenderWidgetHost()) | |
| 316 host_view_->GetRenderWidgetHost()->SetInputMethodActive(false); | |
| 317 } | |
| 318 | |
| 319 #if !defined(TOOLKIT_VIEWS) | |
| 320 // Not defined for views because the views context menu doesn't | |
| 321 // implement input methods yet. | |
| 322 void GtkIMContextWrapper::AppendInputMethodsContextMenu(MenuGtk* menu) { | |
| 323 gboolean show_input_method_menu = TRUE; | |
| 324 | |
| 325 g_object_get(gtk_widget_get_settings(GTK_WIDGET(host_view_->native_view())), | |
| 326 "gtk-show-input-method-menu", &show_input_method_menu, NULL); | |
| 327 if (!show_input_method_menu) | |
| 328 return; | |
| 329 | |
| 330 std::string label = gfx::ConvertAcceleratorsFromWindowsStyle( | |
| 331 l10n_util::GetStringUTF8(IDS_CONTENT_CONTEXT_INPUT_METHODS_MENU)); | |
| 332 GtkWidget* menuitem = gtk_menu_item_new_with_mnemonic(label.c_str()); | |
| 333 GtkWidget* submenu = gtk_menu_new(); | |
| 334 gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem), submenu); | |
| 335 gtk_im_multicontext_append_menuitems(GTK_IM_MULTICONTEXT(context_), | |
| 336 GTK_MENU_SHELL(submenu)); | |
| 337 menu->AppendSeparator(); | |
| 338 menu->AppendMenuItem(IDC_INPUT_METHODS_MENU, menuitem); | |
| 339 } | |
| 340 #endif | |
| 341 | |
| 342 void GtkIMContextWrapper::CancelComposition() { | |
| 343 if (!is_enabled_) | |
| 344 return; | |
| 345 | |
| 346 DCHECK(!is_in_key_event_handler_); | |
| 347 | |
| 348 // To prevent any text from being committed when resetting the |context_|; | |
| 349 is_in_key_event_handler_ = true; | |
| 350 suppress_next_commit_ = true; | |
| 351 | |
| 352 gtk_im_context_reset(context_); | |
| 353 gtk_im_context_reset(context_simple_); | |
| 354 | |
| 355 if (is_focused_) { | |
| 356 // Some input methods may not honour the reset call. Focusing out/in the | |
| 357 // |context_| to make sure it gets reset correctly. | |
| 358 gtk_im_context_focus_out(context_); | |
| 359 gtk_im_context_focus_in(context_); | |
| 360 } | |
| 361 | |
| 362 is_composing_text_ = false; | |
| 363 composition_.Clear(); | |
| 364 commit_text_.clear(); | |
| 365 | |
| 366 is_in_key_event_handler_ = false; | |
| 367 } | |
| 368 | |
| 369 bool GtkIMContextWrapper::NeedCommitByForwardingCharEvent() const { | |
| 370 // If there is no composition text and has only one character to be | |
| 371 // committed, then the character will be send to webkit as a Char event | |
| 372 // instead of a confirmed composition text. | |
| 373 // It should be fine to handle BMP character only, as non-BMP characters | |
| 374 // can always be committed as confirmed composition text. | |
| 375 return !is_composing_text_ && commit_text_.length() == 1; | |
| 376 } | |
| 377 | |
| 378 bool GtkIMContextWrapper::HasInputMethodResult() const { | |
| 379 return commit_text_.length() || is_composition_changed_; | |
| 380 } | |
| 381 | |
| 382 void GtkIMContextWrapper::ProcessFilteredKeyPressEvent( | |
| 383 NativeWebKeyboardEvent* wke) { | |
| 384 // If IME has filtered this event, then replace virtual key code with | |
| 385 // VK_PROCESSKEY. See comment in ProcessKeyEvent() for details. | |
| 386 // It's only required for keydown events. | |
| 387 // To emulate windows behavior, when input method is enabled, if the commit | |
| 388 // text can be emulated by a Char event, then don't do this replacement. | |
| 389 if (!NeedCommitByForwardingCharEvent()) { | |
| 390 wke->windowsKeyCode = kCompositionEventKeyCode; | |
| 391 // keyidentifier must be updated accordingly, otherwise this key event may | |
| 392 // still be processed by webkit. | |
| 393 wke->setKeyIdentifierFromWindowsKeyCode(); | |
| 394 } | |
| 395 host_view_->ForwardKeyboardEvent(*wke); | |
| 396 } | |
| 397 | |
| 398 void GtkIMContextWrapper::ProcessUnfilteredKeyPressEvent( | |
| 399 NativeWebKeyboardEvent* wke) { | |
| 400 // Send keydown event as it, because it's not filtered by IME. | |
| 401 host_view_->ForwardKeyboardEvent(*wke); | |
| 402 | |
| 403 // IME is disabled by WebKit or the GtkIMContext object cannot handle | |
| 404 // this key event. | |
| 405 // This case is caused by two reasons: | |
| 406 // 1. The given key event is a control-key event, (e.g. return, page up, | |
| 407 // page down, tab, arrows, etc.) or; | |
| 408 // 2. The given key event is not a control-key event but printable | |
| 409 // characters aren't assigned to the event, (e.g. alt+d, etc.) | |
| 410 // Create a Char event manually from this key event and send it to the | |
| 411 // renderer when this Char event contains a printable character which | |
| 412 // should be processed by WebKit. | |
| 413 // isSystemKey will be set to true if this key event has Alt modifier, | |
| 414 // see WebInputEventFactory::keyboardEvent() for details. | |
| 415 if (wke->text[0]) { | |
| 416 wke->type = WebKit::WebInputEvent::Char; | |
| 417 wke->skip_in_browser = true; | |
| 418 host_view_->ForwardKeyboardEvent(*wke); | |
| 419 } | |
| 420 } | |
| 421 | |
| 422 void GtkIMContextWrapper::ProcessInputMethodResult(const GdkEventKey* event, | |
| 423 bool filtered) { | |
| 424 RenderWidgetHost* host = host_view_->GetRenderWidgetHost(); | |
| 425 if (!host) | |
| 426 return; | |
| 427 | |
| 428 bool committed = false; | |
| 429 // We do commit before preedit change, so that we can optimize some | |
| 430 // unnecessary preedit changes. | |
| 431 if (commit_text_.length()) { | |
| 432 if (filtered && NeedCommitByForwardingCharEvent()) { | |
| 433 // Send a Char event when we input a composed character without IMEs | |
| 434 // so that this event is to be dispatched to onkeypress() handlers, | |
| 435 // autofill, etc. | |
| 436 // Only commit text generated by a filtered key down event can be sent | |
| 437 // as a Char event, because a unfiltered key down event will probably | |
| 438 // generate another Char event. | |
| 439 // TODO(james.su@gmail.com): Is it necessary to support non BMP chars | |
| 440 // here? | |
| 441 NativeWebKeyboardEvent char_event(commit_text_[0], | |
| 442 event->state, | |
| 443 base::Time::Now().ToDoubleT()); | |
| 444 char_event.skip_in_browser = true; | |
| 445 host_view_->ForwardKeyboardEvent(char_event); | |
| 446 } else { | |
| 447 committed = true; | |
| 448 // Send an IME event. | |
| 449 // Unlike a Char event, an IME event is NOT dispatched to onkeypress() | |
| 450 // handlers or autofill. | |
| 451 host->ImeConfirmComposition(commit_text_); | |
| 452 // Set this flag to false, as this composition session has been | |
| 453 // finished. | |
| 454 is_composing_text_ = false; | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 // Send preedit text only if it's changed. | |
| 459 // If a text has been committed, then we don't need to send the empty | |
| 460 // preedit text again. | |
| 461 if (is_composition_changed_) { | |
| 462 if (composition_.text.length()) { | |
| 463 // Another composition session has been started. | |
| 464 is_composing_text_ = true; | |
| 465 // TODO(suzhe): convert both renderer_host and renderer to use | |
| 466 // ui::CompositionText. | |
| 467 const std::vector<WebKit::WebCompositionUnderline>& underlines = | |
| 468 reinterpret_cast<const std::vector<WebKit::WebCompositionUnderline>&>( | |
| 469 composition_.underlines); | |
| 470 host->ImeSetComposition(composition_.text, underlines, | |
| 471 composition_.selection.start(), | |
| 472 composition_.selection.end()); | |
| 473 } else if (!committed) { | |
| 474 host->ImeCancelComposition(); | |
| 475 } | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 void GtkIMContextWrapper::ConfirmComposition() { | |
| 480 if (!is_enabled_) | |
| 481 return; | |
| 482 | |
| 483 DCHECK(!is_in_key_event_handler_); | |
| 484 | |
| 485 if (is_composing_text_) { | |
| 486 if (host_view_->GetRenderWidgetHost()) | |
| 487 host_view_->GetRenderWidgetHost()->ImeConfirmComposition(); | |
| 488 | |
| 489 // Reset the input method. | |
| 490 CancelComposition(); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 void GtkIMContextWrapper::HandleCommit(const string16& text) { | |
| 495 if (suppress_next_commit_) { | |
| 496 suppress_next_commit_ = false; | |
| 497 return; | |
| 498 } | |
| 499 | |
| 500 // Append the text to the buffer, because commit signal might be fired | |
| 501 // multiple times when processing a key event. | |
| 502 commit_text_.append(text); | |
| 503 // Nothing needs to do, if it's currently in ProcessKeyEvent() | |
| 504 // handler, which will send commit text to webkit later. Otherwise, | |
| 505 // we need send it here. | |
| 506 // It's possible that commit signal is fired without a key event, for | |
| 507 // example when user input via a voice or handwriting recognition software. | |
| 508 // In this case, the text must be committed directly. | |
| 509 if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) { | |
| 510 // Workaround http://crbug.com/45478 by sending fake key down/up events. | |
| 511 SendFakeCompositionKeyEvent(WebKit::WebInputEvent::RawKeyDown); | |
| 512 host_view_->GetRenderWidgetHost()->ImeConfirmComposition(text); | |
| 513 SendFakeCompositionKeyEvent(WebKit::WebInputEvent::KeyUp); | |
| 514 } | |
| 515 } | |
| 516 | |
| 517 void GtkIMContextWrapper::HandlePreeditStart() { | |
| 518 // Ignore preedit related signals triggered by CancelComposition() method. | |
| 519 if (suppress_next_commit_) | |
| 520 return; | |
| 521 is_composing_text_ = true; | |
| 522 } | |
| 523 | |
| 524 void GtkIMContextWrapper::HandlePreeditChanged(const gchar* text, | |
| 525 PangoAttrList* attrs, | |
| 526 int cursor_position) { | |
| 527 // Ignore preedit related signals triggered by CancelComposition() method. | |
| 528 if (suppress_next_commit_) | |
| 529 return; | |
| 530 | |
| 531 // Don't set is_composition_changed_ to false if there is no change, because | |
| 532 // this handler might be called multiple times with the same data. | |
| 533 is_composition_changed_ = true; | |
| 534 composition_.Clear(); | |
| 535 | |
| 536 ui::ExtractCompositionTextFromGtkPreedit(text, attrs, cursor_position, | |
| 537 &composition_); | |
| 538 | |
| 539 // TODO(suzhe): due to a bug of webkit, we currently can't use selection range | |
| 540 // with composition string. See: https://bugs.webkit.org/show_bug.cgi?id=40805 | |
| 541 composition_.selection = ui::Range(cursor_position); | |
| 542 | |
| 543 // In case we are using a buggy input method which doesn't fire | |
| 544 // "preedit_start" signal. | |
| 545 if (composition_.text.length()) | |
| 546 is_composing_text_ = true; | |
| 547 | |
| 548 // Nothing needs to do, if it's currently in ProcessKeyEvent() | |
| 549 // handler, which will send preedit text to webkit later. | |
| 550 // Otherwise, we need send it here if it's been changed. | |
| 551 if (!is_in_key_event_handler_ && is_composing_text_ && | |
| 552 host_view_->GetRenderWidgetHost()) { | |
| 553 // Workaround http://crbug.com/45478 by sending fake key down/up events. | |
| 554 SendFakeCompositionKeyEvent(WebKit::WebInputEvent::RawKeyDown); | |
| 555 // TODO(suzhe): convert both renderer_host and renderer to use | |
| 556 // ui::CompositionText. | |
| 557 const std::vector<WebKit::WebCompositionUnderline>& underlines = | |
| 558 reinterpret_cast<const std::vector<WebKit::WebCompositionUnderline>&>( | |
| 559 composition_.underlines); | |
| 560 host_view_->GetRenderWidgetHost()->ImeSetComposition( | |
| 561 composition_.text, underlines, composition_.selection.start(), | |
| 562 composition_.selection.end()); | |
| 563 SendFakeCompositionKeyEvent(WebKit::WebInputEvent::KeyUp); | |
| 564 } | |
| 565 } | |
| 566 | |
| 567 void GtkIMContextWrapper::HandlePreeditEnd() { | |
| 568 if (composition_.text.length()) { | |
| 569 // The composition session has been finished. | |
| 570 composition_.Clear(); | |
| 571 is_composition_changed_ = true; | |
| 572 | |
| 573 // If there is still a preedit text when firing "preedit-end" signal, | |
| 574 // we need inform webkit to clear it. | |
| 575 // It's only necessary when it's not in ProcessKeyEvent (). | |
| 576 if (!is_in_key_event_handler_ && host_view_->GetRenderWidgetHost()) | |
| 577 host_view_->GetRenderWidgetHost()->ImeCancelComposition(); | |
| 578 } | |
| 579 | |
| 580 // Don't set is_composing_text_ to false here, because "preedit_end" | |
| 581 // signal may be fired before "commit" signal. | |
| 582 } | |
| 583 | |
| 584 void GtkIMContextWrapper::HandleHostViewRealize(GtkWidget* widget) { | |
| 585 // We should only set im context's client window once, because when setting | |
| 586 // client window.im context may destroy and recreate its internal states and | |
| 587 // objects. | |
| 588 if (widget->window) { | |
| 589 gtk_im_context_set_client_window(context_, widget->window); | |
| 590 gtk_im_context_set_client_window(context_simple_, widget->window); | |
| 591 } | |
| 592 } | |
| 593 | |
| 594 void GtkIMContextWrapper::HandleHostViewUnrealize() { | |
| 595 gtk_im_context_set_client_window(context_, NULL); | |
| 596 gtk_im_context_set_client_window(context_simple_, NULL); | |
| 597 } | |
| 598 | |
| 599 void GtkIMContextWrapper::SendFakeCompositionKeyEvent( | |
| 600 WebKit::WebInputEvent::Type type) { | |
| 601 NativeWebKeyboardEvent fake_event; | |
| 602 fake_event.windowsKeyCode = kCompositionEventKeyCode; | |
| 603 fake_event.skip_in_browser = true; | |
| 604 fake_event.type = type; | |
| 605 host_view_->ForwardKeyboardEvent(fake_event); | |
| 606 } | |
| 607 | |
| 608 void GtkIMContextWrapper::HandleCommitThunk( | |
| 609 GtkIMContext* context, gchar* text, GtkIMContextWrapper* self) { | |
| 610 self->HandleCommit(UTF8ToUTF16(text)); | |
| 611 } | |
| 612 | |
| 613 void GtkIMContextWrapper::HandlePreeditStartThunk( | |
| 614 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 615 self->HandlePreeditStart(); | |
| 616 } | |
| 617 | |
| 618 void GtkIMContextWrapper::HandlePreeditChangedThunk( | |
| 619 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 620 gchar* text = NULL; | |
| 621 PangoAttrList* attrs = NULL; | |
| 622 gint cursor_position = 0; | |
| 623 gtk_im_context_get_preedit_string(context, &text, &attrs, &cursor_position); | |
| 624 self->HandlePreeditChanged(text, attrs, cursor_position); | |
| 625 g_free(text); | |
| 626 pango_attr_list_unref(attrs); | |
| 627 } | |
| 628 | |
| 629 void GtkIMContextWrapper::HandlePreeditEndThunk( | |
| 630 GtkIMContext* context, GtkIMContextWrapper* self) { | |
| 631 self->HandlePreeditEnd(); | |
| 632 } | |
| 633 | |
| 634 void GtkIMContextWrapper::HandleHostViewRealizeThunk( | |
| 635 GtkWidget* widget, GtkIMContextWrapper* self) { | |
| 636 self->HandleHostViewRealize(widget); | |
| 637 } | |
| 638 | |
| 639 void GtkIMContextWrapper::HandleHostViewUnrealizeThunk( | |
| 640 GtkWidget* widget, GtkIMContextWrapper* self) { | |
| 641 self->HandleHostViewUnrealize(); | |
| 642 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 7669040:
content: Move render_widget_host_view_gtk to content/ (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src