chrome/browser/ui/views/hung_renderer_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 CHROME_BROWSER_UI_VIEWS_HUNG_RENDERER_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_HUNG_RENDERER_VIEW_H_
   7
   8 #include "base/memory/scoped_vector.h"
   9 #include "chrome/browser/favicon/favicon_tab_helper.h"
  10 #include "content/public/browser/web_contents_observer.h"
  11 #include "ui/base/models/table_model.h"
  12 #include "ui/views/controls/button/button.h"
  13 #include "ui/views/controls/table/table_grouper.h"
  14 #include "ui/views/controls/table/table_view.h"
  15 #include "ui/views/window/dialog_delegate.h"
  16
  17 namespace content {
  18 class WebContents;
  19 }
  20
  21 namespace views {
  22 class LabelButton;
  23 }
  24
  25 // Provides functionality to display information about a hung renderer.
  26 class HungPagesTableModel : public ui::TableModel, public views::TableGrouper {
  27  public:
  28   // The Delegate is notified any time a WebContents the model is listening to
  29   // is destroyed.
  30   class Delegate {
  31    public:
  32     virtual void TabDestroyed() = 0;
  33
  34    protected:
  35     virtual ~Delegate() {}
  36   };
  37
  38   explicit HungPagesTableModel(Delegate* delegate);
  39   ~HungPagesTableModel() override;
  40
  41   void InitForWebContents(content::WebContents* hung_contents);
  42
  43   // Returns the first RenderProcessHost, or NULL if there aren't any
  44   // WebContents.
  45   content::RenderProcessHost* GetRenderProcessHost();
  46
  47   // Returns the first RenderViewHost, or NULL if there aren't any WebContents.
  48   content::RenderViewHost* GetRenderViewHost();
  49
  50   // Overridden from ui::TableModel:
  51   int RowCount() override;
  52   base::string16 GetText(int row, int column_id) override;
  53   gfx::ImageSkia GetIcon(int row) override;
  54   void SetObserver(ui::TableModelObserver* observer) override;
  55
  56   // Overridden from views::TableGrouper:
  57   void GetGroupRange(int model_index, views::GroupRange* range) override;
  58
  59  private:
  60   // Used to track a single WebContents. If the WebContents is destroyed
  61   // TabDestroyed() is invoked on the model.
  62   class WebContentsObserverImpl : public content::WebContentsObserver {
  63    public:
  64     WebContentsObserverImpl(HungPagesTableModel* model,
  65                             content::WebContents* tab);
  66
  67     FaviconTabHelper* favicon_tab_helper() {
  68       return FaviconTabHelper::FromWebContents(web_contents());
  69     }
  70
  71     // WebContentsObserver overrides:
  72     void RenderProcessGone(base::TerminationStatus status) override;
  73     void WebContentsDestroyed() override;
  74
  75    private:
  76     HungPagesTableModel* model_;
  77
  78     DISALLOW_COPY_AND_ASSIGN(WebContentsObserverImpl);
  79   };
  80
  81   // Invoked when a WebContents is destroyed. Cleans up |tab_observers_| and
  82   // notifies the observer and delegate.
  83   void TabDestroyed(WebContentsObserverImpl* tab);
  84
  85   typedef ScopedVector<WebContentsObserverImpl> TabObservers;
  86   TabObservers tab_observers_;
  87
  88   ui::TableModelObserver* observer_;
  89   Delegate* delegate_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(HungPagesTableModel);
  92 };
  93
  94 // This class displays a dialog which contains information about a hung
  95 // renderer process.
  96 class HungRendererDialogView : public views::DialogDelegateView,
  97                                public views::ButtonListener,
  98                                public HungPagesTableModel::Delegate {
  99  public:
 100   // Factory function for creating an instance of the HungRendererDialogView
 101   // class. At any given point only one instance can be active.
 102   static HungRendererDialogView* Create(gfx::NativeWindow context);
 103
 104   // Returns a pointer to the singleton instance if any.
 105   static HungRendererDialogView* GetInstance();
 106
 107   // Shows or hides the hung renderer dialog for the given WebContents.
 108   static void Show(content::WebContents* contents);
 109   static void Hide(content::WebContents* contents);
 110
 111   // Platform specific function to kill the renderer process identified by the
 112   // render process host passed in.
 113   static void KillRendererProcess(content::RenderProcessHost* rph);
 114
 115   // Returns true if the frame is in the foreground.
 116   static bool IsFrameActive(content::WebContents* contents);
 117
 118   virtual void ShowForWebContents(content::WebContents* contents);
 119   virtual void EndForWebContents(content::WebContents* contents);
 120
 121   // views::DialogDelegateView overrides:
 122   base::string16 GetWindowTitle() const override;
 123   void WindowClosing() override;
 124   int GetDialogButtons() const override;
 125   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
 126   views::View* CreateExtraView() override;
 127   bool Accept(bool window_closing) override;
 128   bool UseNewStyleForThisDialog() const override;
 129
 130   // views::ButtonListener overrides:
 131   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 132
 133   // HungPagesTableModel::Delegate overrides:
 134   void TabDestroyed() override;
 135
 136  protected:
 137   HungRendererDialogView();
 138   ~HungRendererDialogView() override;
 139
 140   // views::View overrides:
 141   void ViewHierarchyChanged(
 142       const ViewHierarchyChangedDetails& details) override;
 143
 144   static HungRendererDialogView* g_instance_;
 145
 146  private:
 147   // Initialize the controls in this dialog.
 148   void Init();
 149
 150   static void InitClass();
 151
 152   // Controls within the dialog box.
 153   views::TableView* hung_pages_table_;
 154
 155   // The extra button inserted into the ClientView to kill the errant process.
 156   views::LabelButton* kill_button_;
 157
 158   // The model that provides the contents of the table that shows a list of
 159   // pages affected by the hang.
 160   scoped_ptr<HungPagesTableModel> hung_pages_table_model_;
 161
 162   // Whether or not we've created controls for ourself.
 163   bool initialized_;
 164
 165   // An amusing icon image.
 166   static gfx::ImageSkia* frozen_icon_;
 167
 168   DISALLOW_COPY_AND_ASSIGN(HungRendererDialogView);
 169 };
 170
 171 #endif  // CHROME_BROWSER_UI_VIEWS_HUNG_RENDERER_VIEW_H_