Screensaver implementation for ChromeOS.

ash/screensaver/screensaver_view.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 ASH_SCREENSAVER_SCREENSAVER_VIEW_H_
 #define ASH_SCREENSAVER_SCREENSAVER_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "base/callback.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "googleurl/src/gurl.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace content {
 class BrowserContent;
 }
 
 namespace views {
 class WebView;
 }
 
 namespace ash {
 
 namespace test {
 class ScreensaverViewTest;
 }
 
 ASH_EXPORT void ShowScreensaver(const GURL& url);
 ASH_EXPORT void CloseScreensaver();
+ASH_EXPORT bool IsScreensaverShown();
 
 typedef
     base::Callback<views::WebView*(content::BrowserContext*)> WebViewFactory;
 
 namespace internal {
 
 // Shows a URL as a screensaver. The screensaver window is fullscreen,
 // always on top of every other window and will reload the URL if the
 // renderer crashes for any reason.
 class ScreensaverView : public views::WidgetDelegateView,
                         public content::WebContentsObserver {
  public:
   static void ShowScreensaver(const GURL& url);
   static void CloseScreensaver();
 
+  static bool IsScreensaverShown();
+
  private:
   friend class test::ScreensaverViewTest;
 
   explicit ScreensaverView(const GURL& url);
   virtual ~ScreensaverView();
 
   // views::WidgetDelegate overrides.
   virtual views::View* GetContentsView() OVERRIDE;
 
   // content::WebContentsObserver overrides.
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
 
   void Show();
   void Close();
 
   // Creates and adds web contents to our view.
   void AddChildWebContents();
   // Load the screensaver in the WebView's webcontent. If the webcontents
   // don't exist, they'll be created by WebView.
   void LoadScreensaver();
   // Creates and shows a frameless full screen window containing our view.
   void ShowWindow();
 
   // For testing purposes.
   static ASH_EXPORT ScreensaverView* GetInstance();
+  ASH_EXPORT bool IsScreensaverShowingURL(const GURL& url);
 
   // URL to show in the screensaver.
   GURL url_;
 
   // Number of times the screensaver has been terminated (usually this will be
   // synonymous with the number of times it has crashed).
   int termination_count_;
 
   // Host for the extension that implements this dialog.
   views::WebView* screensaver_webview_;
 
   // Window that holds the screensaver webview.
   views::Widget* container_window_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreensaverView);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SCREENSAVER_SCREENSAVER_VIEW_H_