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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_key_bindings_handler.h" | |
| 6 | |
| 7 #include <gdk/gdkkeysyms.h> | |
| 8 | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/logging.h" | |
| 12 #include "base/string_util.h" | |
| 13 #include "content/common/native_web_keyboard_event.h" | |
| 14 | |
| 15 GtkKeyBindingsHandler::GtkKeyBindingsHandler(GtkWidget* parent_widget) | |
| 16 : handler_(CreateNewHandler()) { | |
| 17 DCHECK(GTK_IS_FIXED(parent_widget)); | |
| 18 // We need add the |handler_| object into gtk widget hierarchy, so that | |
| 19 // gtk_bindings_activate_event() can find correct display and keymaps from | |
| 20 // the |handler_| object. | |
| 21 gtk_fixed_put(GTK_FIXED(parent_widget), handler_.get(), -1, -1); | |
| 22 } | |
| 23 | |
| 24 GtkKeyBindingsHandler::~GtkKeyBindingsHandler() { | |
| 25 handler_.Destroy(); | |
| 26 } | |
| 27 | |
| 28 bool GtkKeyBindingsHandler::Match(const NativeWebKeyboardEvent& wke, | |
| 29 EditCommands* edit_commands) { | |
| 30 if (wke.type == WebKit::WebInputEvent::Char || !wke.os_event) | |
| 31 return false; | |
| 32 | |
| 33 edit_commands_.clear(); | |
| 34 // If this key event matches a predefined key binding, corresponding signal | |
| 35 // will be emitted. | |
| 36 gtk_bindings_activate_event(GTK_OBJECT(handler_.get()), wke.os_event); | |
| 37 | |
| 38 bool matched = !edit_commands_.empty(); | |
| 39 if (edit_commands) | |
| 40 edit_commands->swap(edit_commands_); | |
| 41 return matched; | |
| 42 } | |
| 43 | |
| 44 GtkWidget* GtkKeyBindingsHandler::CreateNewHandler() { | |
| 45 Handler* handler = | |
| 46 static_cast<Handler*>(g_object_new(HandlerGetType(), NULL)); | |
| 47 | |
| 48 handler->owner = this; | |
| 49 | |
| 50 // We don't need to show the |handler| object on screen, so set its size to | |
| 51 // zero. | |
| 52 gtk_widget_set_size_request(GTK_WIDGET(handler), 0, 0); | |
| 53 | |
| 54 // Prevents it from handling any events by itself. | |
| 55 gtk_widget_set_sensitive(GTK_WIDGET(handler), FALSE); | |
| 56 gtk_widget_set_events(GTK_WIDGET(handler), 0); | |
| 57 gtk_widget_set_can_focus(GTK_WIDGET(handler), TRUE); | |
| 58 | |
| 59 #if !GTK_CHECK_VERSION(2, 14, 0) | |
| 60 // "move-focus", "move-viewport", "select-all" and "toggle-cursor-visible" | |
| 61 // have no corresponding virtual methods. Prior to glib 2.18 (gtk 2.14), | |
| 62 // there is no way to override the default class handler of a signal. | |
| 63 // So we need hook these signal explicitly. | |
| 64 g_signal_connect(handler, "move-focus", G_CALLBACK(MoveFocus), NULL); | |
| 65 g_signal_connect(handler, "move-viewport", G_CALLBACK(MoveViewport), NULL); | |
| 66 g_signal_connect(handler, "select-all", G_CALLBACK(SelectAll), NULL); | |
| 67 g_signal_connect(handler, "toggle-cursor-visible", | |
| 68 G_CALLBACK(ToggleCursorVisible), NULL); | |
| 69 #endif | |
| 70 return GTK_WIDGET(handler); | |
| 71 } | |
| 72 | |
| 73 void GtkKeyBindingsHandler::EditCommandMatched( | |
| 74 const std::string& name, const std::string& value) { | |
| 75 edit_commands_.push_back(EditCommand(name, value)); | |
| 76 } | |
| 77 | |
| 78 void GtkKeyBindingsHandler::HandlerInit(Handler *self) { | |
| 79 self->owner = NULL; | |
| 80 } | |
| 81 | |
| 82 void GtkKeyBindingsHandler::HandlerClassInit(HandlerClass *klass) { | |
| 83 GtkTextViewClass* text_view_class = GTK_TEXT_VIEW_CLASS(klass); | |
| 84 GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass); | |
| 85 | |
| 86 // Overrides all virtual methods related to editor key bindings. | |
| 87 text_view_class->backspace = BackSpace; | |
| 88 text_view_class->copy_clipboard = CopyClipboard; | |
| 89 text_view_class->cut_clipboard = CutClipboard; | |
| 90 text_view_class->delete_from_cursor = DeleteFromCursor; | |
| 91 text_view_class->insert_at_cursor = InsertAtCursor; | |
| 92 text_view_class->move_cursor = MoveCursor; | |
| 93 text_view_class->paste_clipboard = PasteClipboard; | |
| 94 text_view_class->set_anchor = SetAnchor; | |
| 95 text_view_class->toggle_overwrite = ToggleOverwrite; | |
| 96 widget_class->show_help = ShowHelp; | |
| 97 | |
| 98 #if GTK_CHECK_VERSION(2, 14, 0) | |
| 99 // "move-focus", "move-viewport", "select-all" and "toggle-cursor-visible" | |
| 100 // have no corresponding virtual methods. Since glib 2.18 (gtk 2.14), | |
| 101 // g_signal_override_class_handler() is introduced to override a signal | |
| 102 // handler. | |
| 103 g_signal_override_class_handler("move-focus", | |
| 104 G_TYPE_FROM_CLASS(klass), | |
| 105 G_CALLBACK(MoveFocus)); | |
| 106 | |
| 107 g_signal_override_class_handler("move-viewport", | |
| 108 G_TYPE_FROM_CLASS(klass), | |
| 109 G_CALLBACK(MoveViewport)); | |
| 110 | |
| 111 g_signal_override_class_handler("select-all", | |
| 112 G_TYPE_FROM_CLASS(klass), | |
| 113 G_CALLBACK(SelectAll)); | |
| 114 | |
| 115 g_signal_override_class_handler("toggle-cursor-visible", | |
| 116 G_TYPE_FROM_CLASS(klass), | |
| 117 G_CALLBACK(ToggleCursorVisible)); | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 GType GtkKeyBindingsHandler::HandlerGetType() { | |
| 122 static volatile gsize type_id_volatile = 0; | |
| 123 if (g_once_init_enter(&type_id_volatile)) { | |
| 124 GType type_id = g_type_register_static_simple( | |
| 125 GTK_TYPE_TEXT_VIEW, | |
| 126 g_intern_static_string("GtkKeyBindingsHandler"), | |
| 127 sizeof(HandlerClass), | |
| 128 reinterpret_cast<GClassInitFunc>(HandlerClassInit), | |
| 129 sizeof(Handler), | |
| 130 reinterpret_cast<GInstanceInitFunc>(HandlerInit), | |
| 131 static_cast<GTypeFlags>(0)); | |
| 132 g_once_init_leave(&type_id_volatile, type_id); | |
| 133 } | |
| 134 return type_id_volatile; | |
| 135 } | |
| 136 | |
| 137 GtkKeyBindingsHandler* GtkKeyBindingsHandler::GetHandlerOwner( | |
| 138 GtkTextView* text_view) { | |
| 139 Handler* handler = G_TYPE_CHECK_INSTANCE_CAST( | |
| 140 text_view, HandlerGetType(), Handler); | |
| 141 DCHECK(handler); | |
| 142 return handler->owner; | |
| 143 } | |
| 144 | |
| 145 void GtkKeyBindingsHandler::BackSpace(GtkTextView* text_view) { | |
| 146 GetHandlerOwner(text_view)->EditCommandMatched("DeleteBackward", ""); | |
| 147 } | |
| 148 | |
| 149 void GtkKeyBindingsHandler::CopyClipboard(GtkTextView* text_view) { | |
| 150 GetHandlerOwner(text_view)->EditCommandMatched("Copy", ""); | |
| 151 } | |
| 152 | |
| 153 void GtkKeyBindingsHandler::CutClipboard(GtkTextView* text_view) { | |
| 154 GetHandlerOwner(text_view)->EditCommandMatched("Cut", ""); | |
| 155 } | |
| 156 | |
| 157 void GtkKeyBindingsHandler::DeleteFromCursor( | |
| 158 GtkTextView* text_view, GtkDeleteType type, gint count) { | |
| 159 if (!count) | |
| 160 return; | |
| 161 | |
| 162 const char *commands[3] = { NULL, NULL, NULL }; | |
| 163 switch (type) { | |
| 164 case GTK_DELETE_CHARS: | |
| 165 commands[0] = (count > 0 ? "DeleteForward" : "DeleteBackward"); | |
| 166 break; | |
| 167 case GTK_DELETE_WORD_ENDS: | |
| 168 commands[0] = (count > 0 ? "DeleteWordForward" : "DeleteWordBackward"); | |
| 169 break; | |
| 170 case GTK_DELETE_WORDS: | |
| 171 if (count > 0) { | |
| 172 commands[0] = "MoveWordForward"; | |
| 173 commands[1] = "DeleteWordBackward"; | |
| 174 } else { | |
| 175 commands[0] = "MoveWordBackward"; | |
| 176 commands[1] = "DeleteWordForward"; | |
| 177 } | |
| 178 break; | |
| 179 case GTK_DELETE_DISPLAY_LINES: | |
| 180 commands[0] = "MoveToBeginningOfLine"; | |
| 181 commands[1] = "DeleteToEndOfLine"; | |
| 182 break; | |
| 183 case GTK_DELETE_DISPLAY_LINE_ENDS: | |
| 184 commands[0] = (count > 0 ? "DeleteToEndOfLine" : | |
| 185 "DeleteToBeginningOfLine"); | |
| 186 break; | |
| 187 case GTK_DELETE_PARAGRAPH_ENDS: | |
| 188 commands[0] = (count > 0 ? "DeleteToEndOfParagraph" : | |
| 189 "DeleteToBeginningOfParagraph"); | |
| 190 break; | |
| 191 case GTK_DELETE_PARAGRAPHS: | |
| 192 commands[0] = "MoveToBeginningOfParagraph"; | |
| 193 commands[1] = "DeleteToEndOfParagraph"; | |
| 194 break; | |
| 195 default: | |
| 196 // GTK_DELETE_WHITESPACE has no corresponding editor command. | |
| 197 return; | |
| 198 } | |
| 199 | |
| 200 GtkKeyBindingsHandler* owner = GetHandlerOwner(text_view); | |
| 201 if (count < 0) | |
| 202 count = -count; | |
| 203 for (; count > 0; --count) { | |
| 204 for (const char* const* p = commands; *p; ++p) | |
| 205 owner->EditCommandMatched(*p, ""); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 void GtkKeyBindingsHandler::InsertAtCursor(GtkTextView* text_view, | |
| 210 const gchar* str) { | |
| 211 if (str && *str) | |
| 212 GetHandlerOwner(text_view)->EditCommandMatched("InsertText", str); | |
| 213 } | |
| 214 | |
| 215 void GtkKeyBindingsHandler::MoveCursor( | |
| 216 GtkTextView* text_view, GtkMovementStep step, gint count, | |
| 217 gboolean extend_selection) { | |
| 218 if (!count) | |
| 219 return; | |
| 220 | |
| 221 std::string command; | |
| 222 switch (step) { | |
| 223 case GTK_MOVEMENT_LOGICAL_POSITIONS: | |
| 224 command = (count > 0 ? "MoveForward" : "MoveBackward"); | |
| 225 break; | |
| 226 case GTK_MOVEMENT_VISUAL_POSITIONS: | |
| 227 command = (count > 0 ? "MoveRight" : "MoveLeft"); | |
| 228 break; | |
| 229 case GTK_MOVEMENT_WORDS: | |
| 230 command = (count > 0 ? "MoveWordForward" : "MoveWordBackward"); | |
| 231 break; | |
| 232 case GTK_MOVEMENT_DISPLAY_LINES: | |
| 233 command = (count > 0 ? "MoveDown" : "MoveUp"); | |
| 234 break; | |
| 235 case GTK_MOVEMENT_DISPLAY_LINE_ENDS: | |
| 236 command = (count > 0 ? "MoveToEndOfLine" : "MoveToBeginningOfLine"); | |
| 237 break; | |
| 238 case GTK_MOVEMENT_PARAGRAPH_ENDS: | |
| 239 command = (count > 0 ? "MoveToEndOfParagraph" : | |
| 240 "MoveToBeginningOfParagraph"); | |
| 241 break; | |
| 242 case GTK_MOVEMENT_PAGES: | |
| 243 command = (count > 0 ? "MovePageDown" : "MovePageUp"); | |
| 244 break; | |
| 245 case GTK_MOVEMENT_BUFFER_ENDS: | |
| 246 command = (count > 0 ? "MoveToEndOfDocument" : | |
| 247 "MoveToBeginningOfDocument"); | |
| 248 break; | |
| 249 default: | |
| 250 // GTK_MOVEMENT_PARAGRAPHS and GTK_MOVEMENT_HORIZONTAL_PAGES have | |
| 251 // no corresponding editor commands. | |
| 252 return; | |
| 253 } | |
| 254 | |
| 255 GtkKeyBindingsHandler* owner = GetHandlerOwner(text_view); | |
| 256 if (extend_selection) | |
| 257 command.append("AndModifySelection"); | |
| 258 if (count < 0) | |
| 259 count = -count; | |
| 260 for (; count > 0; --count) | |
| 261 owner->EditCommandMatched(command, ""); | |
| 262 } | |
| 263 | |
| 264 void GtkKeyBindingsHandler::MoveViewport( | |
| 265 GtkTextView* text_view, GtkScrollStep step, gint count) { | |
| 266 // Not supported by webkit. | |
| 267 #if !GTK_CHECK_VERSION(2, 14, 0) | |
| 268 // Before gtk 2.14.0, there is no way to override a non-virtual default signal | |
| 269 // handler, so we need stop the signal emission explicitly to prevent the | |
| 270 // default handler from being executed. | |
| 271 g_signal_stop_emission_by_name(text_view, "move-viewport"); | |
| 272 #endif | |
| 273 } | |
| 274 | |
| 275 void GtkKeyBindingsHandler::PasteClipboard(GtkTextView* text_view) { | |
| 276 GetHandlerOwner(text_view)->EditCommandMatched("Paste", ""); | |
| 277 } | |
| 278 | |
| 279 void GtkKeyBindingsHandler::SelectAll(GtkTextView* text_view, gboolean select) { | |
| 280 if (select) | |
| 281 GetHandlerOwner(text_view)->EditCommandMatched("SelectAll", ""); | |
| 282 else | |
| 283 GetHandlerOwner(text_view)->EditCommandMatched("Unselect", ""); | |
| 284 #if !GTK_CHECK_VERSION(2, 14, 0) | |
| 285 // Before gtk 2.14.0, there is no way to override a non-virtual default signal | |
| 286 // handler, so we need stop the signal emission explicitly to prevent the | |
| 287 // default handler from being executed. | |
| 288 g_signal_stop_emission_by_name(text_view, "select-all"); | |
| 289 #endif | |
| 290 } | |
| 291 | |
| 292 void GtkKeyBindingsHandler::SetAnchor(GtkTextView* text_view) { | |
| 293 GetHandlerOwner(text_view)->EditCommandMatched("SetMark", ""); | |
| 294 } | |
| 295 | |
| 296 void GtkKeyBindingsHandler::ToggleCursorVisible(GtkTextView* text_view) { | |
| 297 // Not supported by webkit. | |
| 298 #if !GTK_CHECK_VERSION(2, 14, 0) | |
| 299 // Before gtk 2.14.0, there is no way to override a non-virtual default signal | |
| 300 // handler, so we need stop the signal emission explicitly to prevent the | |
| 301 // default handler from being executed. | |
| 302 g_signal_stop_emission_by_name(text_view, "toggle-cursor-visible"); | |
| 303 #endif | |
| 304 } | |
| 305 | |
| 306 void GtkKeyBindingsHandler::ToggleOverwrite(GtkTextView* text_view) { | |
| 307 // Not supported by webkit. | |
| 308 } | |
| 309 | |
| 310 gboolean GtkKeyBindingsHandler::ShowHelp(GtkWidget* widget, | |
| 311 GtkWidgetHelpType arg1) { | |
| 312 // Just for disabling the default handler. | |
| 313 return FALSE; | |
| 314 } | |
| 315 | |
| 316 void GtkKeyBindingsHandler::MoveFocus(GtkWidget* widget, | |
| 317 GtkDirectionType arg1) { | |
| 318 // Just for disabling the default handler. | |
| 319 #if !GTK_CHECK_VERSION(2, 14, 0) | |
| 320 // Before gtk 2.14.0, there is no way to override a non-virtual default signal | |
| 321 // handler, so we need stop the signal emission explicitly to prevent the | |
| 322 // default handler from being executed. | |
| 323 g_signal_stop_emission_by_name(widget, "move-focus"); | |
| 324 #endif | |
| 325 } | |
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Chromium Code Reviews
Issue 7669040:
content: Move render_widget_host_view_gtk to content/ (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src