chrome/browser/ui/gtk/tab_contents/render_view_context_menu_gtk.cc

   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 "chrome/browser/ui/gtk/tab_contents/render_view_context_menu_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/app/chrome_command_ids.h"
  12 #include "chrome/browser/ui/gtk/gtk_util.h"
  13 #include "content/public/browser/render_view_host.h"
  14 #include "content/public/browser/render_widget_host_view.h"
  15 #include "content/public/browser/web_contents.h"
  16 #include "content/public/common/context_menu_params.h"
  17 #include "grit/generated_resources.h"
  18 #include "ui/base/accelerators/menu_label_accelerator_util_linux.h"
  19 #include "ui/base/l10n/l10n_util.h"
  20
  21 using content::WebContents;
  22
  23 namespace {
  24
  25 // A callback function for gtk_container_foreach(). This callback just checks
  26 // the menu ID and set the given user data if it is same as the specified ID.
  27 struct GtkWidgetAtParam {
  28   int index;
  29   GtkWidget* widget;
  30 };
  31
  32 void GtkWidgetAt(GtkWidget* widget, gpointer user_data) {
  33   GtkWidgetAtParam* param = reinterpret_cast<GtkWidgetAtParam*>(user_data);
  34
  35   gpointer data = g_object_get_data(G_OBJECT(widget), "menu-id");
  36   if (data && (GPOINTER_TO_INT(data) - 1) == param->index &&
  37       GTK_IS_MENU_ITEM(widget)) {
  38     param->widget = widget;
  39   }
  40 }
  41
  42 // Retrieves a GtkWidget which has the specified command_id. This function
  43 // traverses the given |model| in the depth-first order. When this function
  44 // finds an item whose command_id is the same as the given |command_id|, it
  45 // returns the GtkWidget associated with the item. This function emulates
  46 // views::MenuItemViews::GetMenuItemByID() for GTK.
  47 GtkWidget* GetMenuItemByID(ui::MenuModel* model,
  48                            GtkWidget* menu,
  49                            int command_id) {
  50   if (!menu)
  51     return NULL;
  52
  53   for (int i = 0; i < model->GetItemCount(); ++i) {
  54     if (model->GetCommandIdAt(i) == command_id) {
  55       GtkWidgetAtParam param;
  56       param.index = i;
  57       param.widget = NULL;
  58       gtk_container_foreach(GTK_CONTAINER(menu), &GtkWidgetAt, &param);
  59       return param.widget;
  60     }
  61
  62     ui::MenuModel* submenu = model->GetSubmenuModelAt(i);
  63     if (submenu) {
  64       GtkWidget* subitem = GetMenuItemByID(
  65           submenu,
  66           gtk_menu_item_get_submenu(GTK_MENU_ITEM(menu)),
  67           command_id);
  68       if (subitem)
  69         return subitem;
  70     }
  71   }
  72   return NULL;
  73 }
  74
  75 }  // namespace
  76
  77 RenderViewContextMenuGtk::RenderViewContextMenuGtk(
  78     WebContents* web_contents,
  79     const content::ContextMenuParams& params,
  80     content::RenderWidgetHostView* view)
  81     : RenderViewContextMenu(web_contents, params),
  82       bidi_submenu_model_(this) {
  83   GdkEventButton* event = view->GetLastMouseDown();
  84   triggering_event_time_ = event ? event->time : GDK_CURRENT_TIME;
  85 }
  86
  87 RenderViewContextMenuGtk::~RenderViewContextMenuGtk() {
  88 }
  89
  90 void RenderViewContextMenuGtk::PlatformInit() {
  91   menu_gtk_.reset(new MenuGtk(this, &menu_model_));
  92
  93   if (params_.is_editable) {
  94     content::RenderWidgetHostView* rwhv =
  95         source_web_contents_->GetRenderWidgetHostView();
  96     if (rwhv) {
  97       MenuGtk* menu = menu_gtk_.get();
  98       gboolean show_input_method_menu = TRUE;
  99
 100       g_object_get(
 101           gtk_widget_get_settings(GTK_WIDGET(rwhv->GetNativeView())),
 102           "gtk-show-input-method-menu", &show_input_method_menu, NULL);
 103       if (!show_input_method_menu)
 104         return;
 105
 106       std::string label = ui::ConvertAcceleratorsFromWindowsStyle(
 107           l10n_util::GetStringUTF8(IDS_CONTENT_CONTEXT_INPUT_METHODS_MENU));
 108       GtkWidget* menuitem = gtk_menu_item_new_with_mnemonic(label.c_str());
 109       GtkWidget* submenu = rwhv->BuildInputMethodsGtkMenu();
 110       gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem), submenu);
 111       int inspect_element_index =
 112           menu_model_.GetIndexOfCommandId(IDC_CONTENT_CONTEXT_INSPECTELEMENT);
 113       if (inspect_element_index != -1) {
 114         menu->InsertSeparator(inspect_element_index - 1);
 115         menu->InsertMenuItem(IDC_INPUT_METHODS_MENU, menuitem,
 116             inspect_element_index);
 117       } else {
 118         menu->AppendSeparator();
 119         menu->AppendMenuItem(IDC_INPUT_METHODS_MENU, menuitem);
 120       }
 121     }
 122   }
 123 }
 124
 125 void RenderViewContextMenuGtk::PlatformCancel() {
 126   menu_gtk_->Cancel();
 127 }
 128
 129 bool RenderViewContextMenuGtk::GetAcceleratorForCommandId(
 130     int command_id,
 131     ui::Accelerator* accelerator) {
 132   return false;
 133 }
 134
 135 void RenderViewContextMenuGtk::Popup(const gfx::Point& point) {
 136   menu_gtk_->PopupAsContext(point, triggering_event_time_);
 137 }
 138
 139 bool RenderViewContextMenuGtk::AlwaysShowIconForCmd(int command_id) const {
 140   return command_id >= IDC_EXTENSIONS_CONTEXT_CUSTOM_FIRST &&
 141       command_id <= IDC_EXTENSIONS_CONTEXT_CUSTOM_LAST;
 142 }
 143
 144 void RenderViewContextMenuGtk::ExecuteCommand(int command_id, int event_flags) {
 145   switch (command_id) {
 146     case IDC_WRITING_DIRECTION_DEFAULT:
 147       // WebKit's current behavior is for this menu item to always be disabled.
 148       NOTREACHED();
 149       break;
 150
 151     case IDC_WRITING_DIRECTION_RTL:
 152     case IDC_WRITING_DIRECTION_LTR: {
 153       content::RenderViewHost* view_host = GetRenderViewHost();
 154       blink::WebTextDirection dir = blink::WebTextDirectionLeftToRight;
 155       if (command_id == IDC_WRITING_DIRECTION_RTL)
 156         dir = blink::WebTextDirectionRightToLeft;
 157       view_host->UpdateTextDirection(dir);
 158       view_host->NotifyTextDirection();
 159       break;
 160     }
 161
 162     default:
 163       RenderViewContextMenu::ExecuteCommand(command_id, event_flags);
 164       break;
 165   }
 166 }
 167
 168 bool RenderViewContextMenuGtk::IsCommandIdChecked(int command_id) const {
 169   switch (command_id) {
 170     case IDC_WRITING_DIRECTION_DEFAULT:
 171       return params_.writing_direction_default &
 172           blink::WebContextMenuData::CheckableMenuItemChecked;
 173     case IDC_WRITING_DIRECTION_RTL:
 174       return params_.writing_direction_right_to_left &
 175           blink::WebContextMenuData::CheckableMenuItemChecked;
 176     case IDC_WRITING_DIRECTION_LTR:
 177       return params_.writing_direction_left_to_right &
 178           blink::WebContextMenuData::CheckableMenuItemChecked;
 179
 180     default:
 181       return RenderViewContextMenu::IsCommandIdChecked(command_id);
 182   }
 183 }
 184
 185 bool RenderViewContextMenuGtk::IsCommandIdEnabled(int command_id) const {
 186   switch (command_id) {
 187     case IDC_WRITING_DIRECTION_MENU:
 188       return true;
 189     case IDC_WRITING_DIRECTION_DEFAULT:  // Provided to match OS defaults.
 190       return params_.writing_direction_default &
 191           blink::WebContextMenuData::CheckableMenuItemEnabled;
 192     case IDC_WRITING_DIRECTION_RTL:
 193       return params_.writing_direction_right_to_left &
 194           blink::WebContextMenuData::CheckableMenuItemEnabled;
 195     case IDC_WRITING_DIRECTION_LTR:
 196       return params_.writing_direction_left_to_right &
 197           blink::WebContextMenuData::CheckableMenuItemEnabled;
 198
 199     default:
 200       return RenderViewContextMenu::IsCommandIdEnabled(command_id);
 201   }
 202 }
 203
 204 void RenderViewContextMenuGtk::AppendPlatformEditableItems() {
 205   // OS X and Linux provide a contextual menu to set writing direction for BiDi
 206   // languages.
 207   // This functionality is exposed as a keyboard shortcut on Windows.
 208   AppendBidiSubMenu();
 209 }
 210
 211 void RenderViewContextMenuGtk::AppendBidiSubMenu() {
 212   bidi_submenu_model_.AddCheckItem(IDC_WRITING_DIRECTION_DEFAULT,
 213       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT));
 214   bidi_submenu_model_.AddCheckItem(IDC_WRITING_DIRECTION_LTR,
 215       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR));
 216   bidi_submenu_model_.AddCheckItem(IDC_WRITING_DIRECTION_RTL,
 217       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL));
 218
 219   menu_model_.AddSubMenu(
 220       IDC_WRITING_DIRECTION_MENU,
 221       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_MENU),
 222       &bidi_submenu_model_);
 223 }
 224
 225 void RenderViewContextMenuGtk::UpdateMenuItem(int command_id,
 226                                               bool enabled,
 227                                               bool hidden,
 228                                               const base::string16& title) {
 229   GtkWidget* item = GetMenuItemByID(&menu_model_, menu_gtk_->widget(),
 230                                     command_id);
 231   if (!item || !GTK_IS_MENU_ITEM(item))
 232     return;
 233
 234   // Enable (or disable) the menu item and updates its text.
 235   gtk_widget_set_sensitive(item, enabled);
 236   if (hidden)
 237     gtk_widget_hide(item);
 238   else
 239     gtk_widget_show(item);
 240   gtk_menu_item_set_label(GTK_MENU_ITEM(item),
 241                           base::UTF16ToUTF8(title).c_str());
 242 }