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_HUNG_PLUGIN_TAB_HELPER_H_ 6 #define CHROME_BROWSER_UI_HUNG_PLUGIN_TAB_HELPER_H_ 7 8 #include <map> 9 10 #include "base/memory/linked_ptr.h" 11 #include "base/strings/string16.h" 12 #include "base/time/time.h" 13 #include "base/timer/timer.h" 14 #include "content/public/browser/notification_observer.h" 15 #include "content/public/browser/notification_registrar.h" 16 #include "content/public/browser/web_contents_observer.h" 17 #include "content/public/browser/web_contents_user_data.h" 18 19 namespace base { 20 class FilePath; 21 } 22 23 namespace infobars { 24 class InfoBarDelegate; 25 } 26 27 // Manages per-tab state with regard to hung plugins. This only handles 28 // Pepper plugins which we know are windowless. Hung NPAPI plugins (which 29 // may have native windows) can not be handled with infobars and have a 30 // separate OS-specific hang monitoring. 31 // 32 // Our job is: 33 // - Pop up an infobar when a plugin is hung. 34 // - Terminate the plugin process if the user so chooses. 35 // - Periodically re-show the hung plugin infobar if the user closes it without 36 // terminating the plugin. 37 // - Hide the infobar if the plugin starts responding again. 38 // - Keep track of all of this for any number of plugins. 39 class HungPluginTabHelper 40 : public content::WebContentsObserver, 41 public content::NotificationObserver, 42 public content::WebContentsUserData<HungPluginTabHelper> { 43 public: 44 virtual ~HungPluginTabHelper(); 45 46 // content::WebContentsObserver: 47 virtual void PluginCrashed(const base::FilePath& plugin_path, 48 base::ProcessId plugin_pid) OVERRIDE; 49 virtual void PluginHungStatusChanged(int plugin_child_id, 50 const base::FilePath& plugin_path, 51 bool is_hung) OVERRIDE; 52 53 // content::NotificationObserver: 54 virtual void Observe(int type, 55 const content::NotificationSource& source, 56 const content::NotificationDetails& details) OVERRIDE; 57 58 // Called by an infobar when the user selects to kill the plugin. 59 void KillPlugin(int child_id); 60 61 private: 62 friend class content::WebContentsUserData<HungPluginTabHelper>; 63 64 struct PluginState; 65 typedef std::map<int, linked_ptr<PluginState> > PluginStateMap; 66 67 explicit HungPluginTabHelper(content::WebContents* contents); 68 69 // Called on a timer for a hung plugin to re-show the bar. 70 void OnReshowTimer(int child_id); 71 72 // Shows the bar for the plugin identified by the given state, updating the 73 // state accordingly. The plugin must not have an infobar already. 74 void ShowBar(int child_id, PluginState* state); 75 76 // Closes the infobar associated with the given state. Note that this can 77 // be called even if the bar is not opened, in which case it will do nothing. 78 void CloseBar(PluginState* state); 79 80 content::NotificationRegistrar registrar_; 81 82 // All currently hung plugins. 83 PluginStateMap hung_plugins_; 84 85 DISALLOW_COPY_AND_ASSIGN(HungPluginTabHelper); 86 }; 87 88 #endif // CHROME_BROWSER_UI_HUNG_PLUGIN_TAB_HELPER_H_ 89