Implement Browser Actions extensions....

chrome/browser/views/browser_actions_container.h

+// Copyright (c) 2009 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_VIEWS_BROWSER_ACTIONS_PANEL_H_
+#define CHROME_BROWSER_VIEWS_BROWSER_ACTIONS_PANEL_H_
+
+#include <vector>
+
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+#include "views/view.h"
+
+class ContextualAction;
+class Profile;
+class ToolbarView;
+namespace views {
+class ImageButton;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The BrowserActionsContainer is a container view, responsible for drawing the
+// icons that represent browser actions (extensions that add icons to the
+// toolbar).
+//
+////////////////////////////////////////////////////////////////////////////////
+class BrowserActionsContainer : public views::View,
+                                public NotificationObserver {
+ public:
+  BrowserActionsContainer(Profile* profile, ToolbarView* toolbar);
+  virtual ~BrowserActionsContainer();
+
+  // Update the views to reflect the state of the browser action icons.
+  void RefreshBrowserActionViews();
+
+  // Delete all browser action views.
+  void DeleteBrowserActionViews();
+
+  // Called when a browser action becomes visible/hidden.
+  void OnBrowserActionVisibilityChanged();
+
+  // Called when the user clicks on the browser action icon.
+  void OnBrowserActionExecuted(const ContextualAction& browser_action);
+
+  // Overridden from views::View:
+  virtual gfx::Size GetPreferredSize();
+  virtual void Layout();
+
+  // Overridden from NotificationObserver:
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+ private:
+  // The vector of browser actions (icons/image buttons for each action).
+  std::vector<views::ImageButton*> browser_action_views_;
+
+  NotificationRegistrar registrar_;
+
+  Profile* profile_;
+
+  // The toolbar that owns us.
+  ToolbarView* toolbar_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserActionsContainer);
+};
+
+#endif  // CHROME_BROWSER_VIEWS_BROWSER_ACTIONS_PANEL_H_