Tracks changes to zoom icon and zoom percentage. Notifies browser window if the icon should be chan…

chrome/browser/ui/browser.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 22 matching lines @@
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/constrained_window_tab_helper_delegate.h"
 #include "chrome/browser/ui/fullscreen_exit_bubble_type.h"
 #include "chrome/browser/ui/search_engines/search_engine_tab_helper_delegate.h"
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "chrome/browser/ui/webui/sync_promo/sync_promo_ui.h"
+#include "chrome/browser/ui/zoom/zoom_tab_helper_delegate.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/page_zoom.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/rect.h"
@@ skipping 31 matching lines @@
 }
 
 class Browser : public TabStripModelDelegate,
                 public TabStripModelObserver,
                 public content::WebContentsDelegate,
                 public CoreTabHelperDelegate,
                 public SearchEngineTabHelperDelegate,
                 public ConstrainedWindowTabHelperDelegate,
                 public BlockedContentTabHelperDelegate,
                 public BookmarkTabHelperDelegate,
+                public ZoomTabHelperDelegate,

[Ben Goodger (Google), 2012/05/29 18:04:41]

rather than make Browser be the observer, and then have to wire the notification
through to the platform specific frontend bit, why not just have the specific
piece of platform frontend be the observer?

[Kyle Horimoto, 2012/05/31 23:13:52]

As discussed offline, if the Browser is not the observer, there doesn't seem to
be a way to change the icon when 1) A tab is pulled out of a window into it's
own window, 2) A tab is popped into an existing window, or 3) The active tab on
a single window changes. I'll keep this implementation unless we can find a
better way to do this.

                 public ExtensionTabHelperDelegate,
                 public content::PageNavigator,
                 public CommandUpdater::CommandUpdaterDelegate,
                 public content::NotificationObserver,
                 public SelectFileDialog::Listener,
                 public TabRestoreServiceObserver,
                 public ProfileSyncServiceObserver,
                 public InstantDelegate {
  public:
   // SessionService::WindowType mirrors these values.  If you add to this
@@ skipping 900 matching lines @@
                                     bool blocked) OVERRIDE;
 
   // Overridden from BlockedContentTabHelperDelegate:
   virtual TabContentsWrapper* GetConstrainingContentsWrapper(
       TabContentsWrapper* source) OVERRIDE;
 
   // Overridden from BookmarkTabHelperDelegate:
   virtual void URLStarredChanged(TabContentsWrapper* source,
                                  bool starred) OVERRIDE;
 
+  // Overridden from ZoomTabHelperDelegate:
+  virtual void ZoomIconStateChanged(TabContentsWrapper *source,
+                                    ZoomTabHelper::ZoomIconState state,
+                                    int zoomPercent) OVERRIDE;
+  virtual void ZoomChanged(TabContentsWrapper *source,
+                           int zoomPercent) OVERRIDE;
+
   // Overridden from ExtensionTabHelperDelegate:
   virtual void OnDidGetApplicationInfo(TabContentsWrapper* source,
                                        int32 page_id) OVERRIDE;
   virtual void OnInstallApplication(
       TabContentsWrapper* source,
       const WebApplicationInfo& app_info) OVERRIDE;
 
   // Overridden from SelectFileDialog::Listener:
   virtual void FileSelected(const FilePath& path,
                             int index,
@@ skipping 382 matching lines @@
   bool window_has_shown_;
 
   // Currently open color chooser. Non-NULL after OpenColorChooser is called and
   // before DidEndColorChooser is called.
   scoped_ptr<content::ColorChooser> color_chooser_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_