ash/screensaver/screensaver_view.h

   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_