chrome/browser/ui/cocoa/hung_renderer_controller.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_COCOA_HUNG_RENDERER_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_COCOA_HUNG_RENDERER_CONTROLLER_H_
   7
   8 // A controller for the Mac hung renderer dialog window.  Only one
   9 // instance of this controller can exist at any time, although a given
  10 // controller is destroyed when its window is closed.
  11 //
  12 // The dialog itself displays a list of frozen tabs, all of which
  13 // share a render process.  Since there can only be a single dialog
  14 // open at a time, if showForWebContents is called for a different
  15 // tab, the dialog is repurposed to show a warning for the new tab.
  16 //
  17 // The caller is required to call endForWebContents before deleting
  18 // any WebContents object.
  19
  20 #import <Cocoa/Cocoa.h>
  21
  22 #import "base/mac/scoped_nsobject.h"
  23 #import "base/memory/scoped_ptr.h"
  24
  25 @class MultiKeyEquivalentButton;
  26 class WebContentsObserverBridge;
  27
  28 namespace content {
  29 class WebContents;
  30 }
  31
  32 @interface HungRendererController : NSWindowController<NSTableViewDataSource> {
  33  @private
  34   IBOutlet MultiKeyEquivalentButton* waitButton_;
  35   IBOutlet NSButton* killButton_;
  36   IBOutlet NSTableView* tableView_;
  37   IBOutlet NSImageView* imageView_;
  38   IBOutlet NSTextField* messageView_;
  39
  40   // The WebContents for which this dialog is open.  Should never be
  41   // NULL while this dialog is open.
  42   content::WebContents* hungContents_;
  43
  44   // Observes |hungContents_| in case it closes while the panel is up.
  45   scoped_ptr<WebContentsObserverBridge> hungContentsObserver_;
  46
  47   // Backing data for |tableView_|.  Titles of each WebContents that
  48   // shares a renderer process with |hungContents_|.
  49   base::scoped_nsobject<NSArray> hungTitles_;
  50
  51   // Favicons of each WebContents that shares a renderer process with
  52   // |hungContents_|.
  53   base::scoped_nsobject<NSArray> hungFavicons_;
  54 }
  55
  56 // Kills the hung renderers.
  57 - (IBAction)kill:(id)sender;
  58
  59 // Waits longer for the renderers to respond.
  60 - (IBAction)wait:(id)sender;
  61
  62 // Modifies the dialog to show a warning for the given tab contents.
  63 // The dialog will contain a list of all tabs that share a renderer
  64 // process with |contents|.  The caller must not delete any tab
  65 // contents without first calling endForWebContents.
  66 - (void)showForWebContents:(content::WebContents*)contents;
  67
  68 // Notifies the dialog that |contents| is either responsive or closed.
  69 // If |contents| shares the same render process as the tab contents
  70 // this dialog was created for, this function will close the dialog.
  71 // If |contents| has a different process, this function does nothing.
  72 - (void)endForWebContents:(content::WebContents*)contents;
  73
  74 // Called by |hungContentsObserver_| to indicate that |hungContents_|
  75 // has gone away.
  76 - (void)renderProcessGone;
  77
  78 @end  // HungRendererController
  79
  80
  81 @interface HungRendererController (JustForTesting)
  82 - (NSButton*)killButton;
  83 - (MultiKeyEquivalentButton*)waitButton;
  84 @end
  85
  86 #endif  // CHROME_BROWSER_UI_COCOA_HUNG_RENDERER_CONTROLLER_H_