Change browser/page action default icon defined in manifest to support hidpi.

chrome/browser/ui/gtk/browser_actions_toolbar_gtk.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/gtk/browser_actions_toolbar_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/api/commands/command_service.h"
 #include "chrome/browser/extensions/api/commands/command_service_factory.h"
+#include "chrome/browser/extensions/extension_action_icon_factory.h"
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 #include "chrome/browser/ui/gtk/extensions/extension_popup_gtk.h"
 #include "chrome/browser/ui/gtk/gtk_chrome_button.h"
 #include "chrome/browser/ui/gtk/gtk_chrome_shrinkable_hbox.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
@@ skipping 53 matching lines @@
 gint WidthForIconCount(gint icon_count) {
   return std::max((kButtonWidth + kButtonPadding) * icon_count - kButtonPadding,
                   0);
 }
 
 }  // namespace
 
 using ui::SimpleMenuModel;
 
 class BrowserActionButton : public content::NotificationObserver,
-                            public ImageLoadingTracker::Observer,
+                            public ExtensionActionIconFactory::Observer,
                             public ExtensionContextMenuModel::PopupDelegate,
                             public MenuGtk::Delegate {
  public:
   BrowserActionButton(BrowserActionsToolbarGtk* toolbar,
                       const Extension* extension,
                       GtkThemeService* theme_provider)
       : toolbar_(toolbar),
         extension_(extension),
         image_(NULL),
-        tracker_(this),
-        tab_specific_icon_(NULL),
-        default_icon_(NULL),
+        ALLOW_THIS_IN_INITIALIZER_LIST(icon_factory_(extension, this)),
         accel_group_(NULL) {
     button_.reset(new CustomDrawButton(
         theme_provider,
         IDR_BROWSER_ACTION,
         IDR_BROWSER_ACTION_P,
         IDR_BROWSER_ACTION_H,
         0,
         NULL));
     gtk_widget_set_size_request(button(), kButtonWidth, kButtonWidth);
     alignment_.Own(gtk_alignment_new(0, 0, 1, 1));
     gtk_container_add(GTK_CONTAINER(alignment_.get()), button());
     gtk_widget_show(button());
 
     DCHECK(extension_->browser_action());
 
-    // The Browser Action API does not allow the default icon path to be
-    // changed at runtime, so we can load this now and cache it.
-    std::string path = extension_->browser_action()->default_icon_path();
-    if (!path.empty()) {
-      tracker_.LoadImage(extension_, extension_->GetResource(path),
-                         gfx::Size(Extension::kBrowserActionIconMaxSize,
-                                   Extension::kBrowserActionIconMaxSize),
-                         ImageLoadingTracker::DONT_CACHE);
-    }
-
     UpdateState();
 
     signals_.Connect(button(), "button-press-event",
                      G_CALLBACK(OnButtonPress), this);
     signals_.Connect(button(), "clicked",
                      G_CALLBACK(OnClicked), this);
     signals_.Connect(button(), "drag-begin",
                      G_CALLBACK(&OnDragBegin), this);
     signals_.ConnectAfter(widget(), "expose-event",
                      G_CALLBACK(OnExposeEvent), this);
@@ skipping 21 matching lines @@
         toolbar->browser()->profile()->GetOriginalProfile()));
     registrar_.Add(
         this, chrome::NOTIFICATION_EXTENSION_COMMAND_REMOVED,
         content::Source<Profile>(
         toolbar->browser()->profile()->GetOriginalProfile()));
   }
 
   ~BrowserActionButton() {
     DisconnectBrowserActionPopupAccelerator();
 
-    if (tab_specific_icon_)
-      g_object_unref(tab_specific_icon_);
-
-    if (default_icon_)
-      g_object_unref(default_icon_);
-
     alignment_.Destroy();
   }
 
   GtkWidget* button() { return button_->widget(); }
 
   GtkWidget* widget() { return alignment_.get(); }
 
   const Extension* extension() { return extension_; }
 
   // NotificationObserver implementation.
@@ skipping 22 matching lines @@
           DisconnectBrowserActionPopupAccelerator();
       }
       break;
      }
      default:
       NOTREACHED();
       break;
     }
   }
 
-  // ImageLoadingTracker::Observer implementation.
-  void OnImageLoaded(const gfx::Image& image,
-                     const std::string& extension_id,
-                     int index) OVERRIDE {
-    extension_->browser_action()->CacheIcon(
-        extension_->browser_action()->default_icon_path(), image);
+  // ExtensionActionIconFactory::Observer implementation.
+  void OnIconUpdated() OVERRIDE {
     UpdateState();
   }
 
   // Updates the button based on the latest state from the associated
   // browser action.
   void UpdateState() {
     int tab_id = toolbar_->GetCurrentTabId();
     if (tab_id < 0)
       return;
 
     std::string tooltip = extension_->browser_action()->GetTitle(tab_id);
     if (tooltip.empty())
       gtk_widget_set_has_tooltip(button(), FALSE);
     else
       gtk_widget_set_tooltip_text(button(), tooltip.c_str());
 
-    gfx::Image image = extension_->browser_action()->GetIcon(tab_id);
+    gfx::Image image =
+        extension_->browser_action()->GetIcon(tab_id, &icon_factory_);
     if (!image.IsEmpty())
       SetImage(image.ToGdkPixbuf());
     bool enabled = extension_->browser_action()->GetIsVisible(tab_id);
     gtk_widget_set_sensitive(button(), enabled);
 
     gtk_widget_queue_draw(button());
   }
 
   gfx::Image GetIcon() {
     return extension_->browser_action()->GetIcon(
-        toolbar_->GetCurrentTabId());
+        toolbar_->GetCurrentTabId(), &icon_factory_);
   }
 
   MenuGtk* GetContextMenu() {
     if (!extension_->ShowConfigureContextMenus())
       return NULL;
 
     context_menu_model_ =
         new ExtensionContextMenuModel(extension_, toolbar_->browser(), this);
     context_menu_.reset(
         new MenuGtk(this, context_menu_model_.get()));
@@ skipping 190 matching lines @@
 
   // The top level widget (parent of |button_|).
   ui::OwnedWidgetGtk alignment_;
 
   // The one image subwidget in |button_|. We keep this out so we don't alter
   // the widget hierarchy while changing the button image because changing the
   // GTK widget hierarchy invalidates all tooltips and several popular
   // extensions change browser action icon in a loop.
   GtkWidget* image_;
 
-  // Loads the button's icons for us on the file thread.
-  ImageLoadingTracker tracker_;
-
-  // If we are displaying a tab-specific icon, it will be here.
-  GdkPixbuf* tab_specific_icon_;
-
-  // If the browser action has a default icon, it will be here.
-  GdkPixbuf* default_icon_;
+  // The object that browser action will use to create icon for us.
+  // It may load icon asynchronously (in which case initial icon returned by
+  // the action will be blank), so we have to observe it for icon's updates.
+  ExtensionActionIconFactory  icon_factory_;
 
   // Same as |default_icon_|, but stored as SkBitmap.
   SkBitmap default_skbitmap_;
 
   ui::GtkSignalRegistrar signals_;
   content::NotificationRegistrar registrar_;
 
   // The accelerator group used to handle accelerators, owned by this object.
   GtkAccelGroup* accel_group_;
 
@@ skipping 611 matching lines @@
 
   menu->PopupAsContext(gfx::Point(event->x_root, event->y_root),
                        event->time);
   return TRUE;
 }
 
 void BrowserActionsToolbarGtk::OnButtonShowOrHide(GtkWidget* sender) {
   if (!resize_animation_.is_animating())
     UpdateChevronVisibility();
 }