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      1 // Copyright (c) 2006-2008 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 #pragma once
      8 
      9 #include "chrome/browser/hang_monitor/hung_window_detector.h"
     10 // This class provides an implementation the
     11 // HungWindowDetector::HungWindowNotification callback interface.
     12 // It checks to see if the hung window belongs to a process different
     13 // from that of the browser process and, if so, it returns an action
     14 // of HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS.
     15 // Note: We can write other action classes that implement the same
     16 // interface and switch the action done on hung plugins based on user
     17 // preferences.
     18 class HungPluginAction : public HungWindowDetector::HungWindowNotification {
     19  public:
     20   HungPluginAction();
     21   ~HungPluginAction();
     22   // HungWindowNotification implementation
     23   virtual bool OnHungWindowDetected(HWND hung_window,
     24                                     HWND top_level_window,
     25                                     ActionOnHungWindow* action);
     26 
     27  protected:
     28   void OnWindowResponsive(HWND window);
     29 
     30   // The callback function for the SendMessageCallback API
     31   static void CALLBACK HungWindowResponseCallback(HWND target_window,
     32                                                   UINT message,
     33                                                   ULONG_PTR data,
     34                                                   LRESULT result);
     35 
     36   static BOOL CALLBACK DismissMessageBox(HWND window, LPARAM ignore);
     37 
     38  protected:
     39   bool GetPluginName(HWND plugin_window,
     40                      DWORD browser_process_id,
     41                      std::wstring *plugin_name);
     42   // The currently hung plugin window that we are prompting the user about
     43   HWND current_hung_plugin_window_;
     44 };
     45 
     46 #endif  // CHROME_BROWSER_HANG_MONITOR_HUNG_PLUGIN_ACTION_H__
     47