chrome/browser/hang_monitor/hung_plugin_action.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_HANG_MONITOR_HUNG_PLUGIN_ACTION_H__
   6 #define CHROME_BROWSER_HANG_MONITOR_HUNG_PLUGIN_ACTION_H__
   7
   8 #include "base/strings/string16.h"
   9 #include "chrome/browser/hang_monitor/hung_window_detector.h"
  10
  11 // This class provides an implementation the
  12 // HungWindowDetector::HungWindowNotification callback interface.
  13 // It checks to see if the hung window belongs to a process different
  14 // from that of the browser process and, if so, it returns an action
  15 // of HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS.
  16 // Note: We can write other action classes that implement the same
  17 // interface and switch the action done on hung plugins based on user
  18 // preferences.
  19 class HungPluginAction : public HungWindowDetector::HungWindowNotification {
  20  public:
  21   HungPluginAction();
  22   ~HungPluginAction();
  23   // HungWindowNotification implementation
  24   virtual bool OnHungWindowDetected(HWND hung_window,
  25                                     HWND top_level_window,
  26                                     ActionOnHungWindow* action);
  27
  28  protected:
  29   void OnWindowResponsive(HWND window);
  30
  31   // The callback function for the SendMessageCallback API
  32   static void CALLBACK HungWindowResponseCallback(HWND target_window,
  33                                                   UINT message,
  34                                                   ULONG_PTR data,
  35                                                   LRESULT result);
  36
  37   static BOOL CALLBACK DismissMessageBox(HWND window, LPARAM ignore);
  38
  39  protected:
  40   bool GetPluginNameAndVersion(HWND plugin_window,
  41                                DWORD browser_process_id,
  42                                base::string16* plugin_name,
  43                                base::string16* plugin_version);
  44   // The currently hung plugin window that we are prompting the user about
  45   HWND current_hung_plugin_window_;
  46 };
  47
  48 #endif  // CHROME_BROWSER_HANG_MONITOR_HUNG_PLUGIN_ACTION_H__