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      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 #ifndef ASH_SCREENSAVER_SCREENSAVER_VIEW_H_
      6 #define ASH_SCREENSAVER_SCREENSAVER_VIEW_H_
      7 
      8 #include "ash/content_support/ash_with_content_export.h"
      9 #include "base/callback.h"
     10 #include "content/public/browser/web_contents_observer.h"
     11 #include "ui/views/widget/widget_delegate.h"
     12 #include "url/gurl.h"
     13 
     14 namespace content {
     15 class BrowserContent;
     16 }
     17 
     18 namespace views {
     19 class WebView;
     20 }
     21 
     22 namespace ash {
     23 
     24 namespace test {
     25 class ScreensaverViewTest;
     26 }
     27 
     28 ASH_WITH_CONTENT_EXPORT void ShowScreensaver(const GURL& url);
     29 ASH_WITH_CONTENT_EXPORT void CloseScreensaver();
     30 ASH_WITH_CONTENT_EXPORT bool IsScreensaverShown();
     31 
     32 typedef
     33     base::Callback<views::WebView*(content::BrowserContext*)> WebViewFactory;
     34 
     35 // Shows a URL as a screensaver. The screensaver window is fullscreen,
     36 // always on top of every other window and will reload the URL if the
     37 // renderer crashes for any reason.
     38 class ScreensaverView : public views::WidgetDelegateView,
     39                         public content::WebContentsObserver {
     40  public:
     41   static void ShowScreensaver(const GURL& url);
     42   static void CloseScreensaver();
     43 
     44   static bool IsScreensaverShown();
     45 
     46  private:
     47   friend class test::ScreensaverViewTest;
     48 
     49   explicit ScreensaverView(const GURL& url);
     50   virtual ~ScreensaverView();
     51 
     52   // views::WidgetDelegate overrides.
     53   virtual views::View* GetContentsView() OVERRIDE;
     54 
     55   // content::WebContentsObserver overrides.
     56   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
     57 
     58   void Show();
     59   void Close();
     60 
     61   // Creates and adds web contents to our view.
     62   void AddChildWebContents();
     63   // Load the screensaver in the WebView's webcontent. If the webcontents
     64   // don't exist, they'll be created by WebView.
     65   void LoadScreensaver();
     66   // Creates and shows a frameless full screen window containing our view.
     67   void ShowWindow();
     68 
     69   // For testing purposes.
     70   static ASH_WITH_CONTENT_EXPORT ScreensaverView* GetInstance();
     71   ASH_WITH_CONTENT_EXPORT bool IsScreensaverShowingURL(const GURL& url);
     72 
     73   // URL to show in the screensaver.
     74   GURL url_;
     75 
     76   // Number of times the screensaver has been terminated (usually this will be
     77   // synonymous with the number of times it has crashed).
     78   int termination_count_;
     79 
     80   // Host for the extension that implements this dialog.
     81   views::WebView* screensaver_webview_;
     82 
     83   // Window that holds the screensaver webview.
     84   views::Widget* container_window_;
     85 
     86   DISALLOW_COPY_AND_ASSIGN(ScreensaverView);
     87 };
     88 
     89 }  // namespace ash
     90 
     91 #endif  // ASH_SCREENSAVER_SCREENSAVER_VIEW_H_
     92