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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <windows.h>
#include "chrome/browser/hang_monitor/hung_plugin_action.h"
#include "app/l10n_util.h"
#include "app/win_util.h"
#include "base/win_util.h"
#include "chrome/browser/platform_util.h"
#include "chrome/common/logging_chrome.h"
#include "grit/generated_resources.h"
#include "webkit/plugins/npapi/webplugin_delegate_impl.h"
HungPluginAction::HungPluginAction() : current_hung_plugin_window_(NULL) {
}
HungPluginAction::~HungPluginAction() {
}
bool HungPluginAction::OnHungWindowDetected(HWND hung_window,
HWND top_level_window,
ActionOnHungWindow* action) {
if (NULL == action) {
return false;
}
if (!IsWindow(hung_window)) {
return false;
}
bool continue_hang_detection = true;
DWORD hung_window_process_id = 0;
DWORD top_level_window_process_id = 0;
GetWindowThreadProcessId(hung_window, &hung_window_process_id);
GetWindowThreadProcessId(top_level_window, &top_level_window_process_id);
*action = HungWindowNotification::HUNG_WINDOW_IGNORE;
if (top_level_window_process_id != hung_window_process_id) {
if (logging::DialogsAreSuppressed()) {
NOTREACHED() << "Terminated a hung plugin process.";
*action = HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS;
} else {
std::wstring plugin_name;
GetPluginName(hung_window,
top_level_window_process_id,
&plugin_name);
if (plugin_name.empty()) {
plugin_name = l10n_util::GetString(IDS_UNKNOWN_PLUGIN_NAME);
}
std::wstring msg = l10n_util::GetStringF(IDS_BROWSER_HANGMONITOR,
plugin_name);
std::wstring title = l10n_util::GetString(IDS_BROWSER_HANGMONITOR_TITLE);
// Before displaying the message box,invoke SendMessageCallback on the
// hung window. If the callback ever hits,the window is not hung anymore
// and we can dismiss the message box.
SendMessageCallback(hung_window,
WM_NULL,
0,
0,
HungWindowResponseCallback,
reinterpret_cast<ULONG_PTR>(this));
current_hung_plugin_window_ = hung_window;
if (platform_util::SimpleYesNoBox(NULL, title, msg)) {
*action = HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS;
} else {
// If the user choses to ignore the hung window warning, the
// message timeout for this window should be doubled. We only
// double the timeout property on the window if the property
// exists. The property is deleted if the window becomes
// responsive.
continue_hang_detection = false;
#pragma warning(disable:4311)
int child_window_message_timeout =
reinterpret_cast<int>(GetProp(
hung_window, HungWindowDetector::kHungChildWindowTimeout));
#pragma warning(default:4311)
if (child_window_message_timeout) {
child_window_message_timeout *= 2;
#pragma warning(disable:4312)
// TODO: this leaks.
SetProp(hung_window, HungWindowDetector::kHungChildWindowTimeout,
reinterpret_cast<HANDLE>(child_window_message_timeout));
#pragma warning(default:4312)
}
}
current_hung_plugin_window_ = NULL;
}
}
if (HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS == *action) {
// Enable the top-level window just in case the plugin had been
// displaying a modal box that had disabled the top-level window
EnableWindow(top_level_window, TRUE);
}
return continue_hang_detection;
}
void HungPluginAction::OnWindowResponsive(HWND window) {
if (window == current_hung_plugin_window_) {
// The message timeout for this window should fallback to the default
// timeout as this window is now responsive.
RemoveProp(window, HungWindowDetector::kHungChildWindowTimeout);
// The monitored plugin recovered. Let's dismiss the message box.
EnumThreadWindows(GetCurrentThreadId(),
reinterpret_cast<WNDENUMPROC>(DismissMessageBox),
NULL);
}
}
bool HungPluginAction::GetPluginName(HWND plugin_window,
DWORD browser_process_id,
std::wstring* plugin_name) {
DCHECK(plugin_name);
HWND window_to_check = plugin_window;
while (NULL != window_to_check) {
DWORD process_id = 0;
GetWindowThreadProcessId(window_to_check, &process_id);
if (process_id == browser_process_id) {
// If we have reached a window the that belongs to the browser process
// we have gone too far.
return false;
}
if (webkit::npapi::WebPluginDelegateImpl::GetPluginNameFromWindow(
window_to_check, plugin_name)) {
return true;
}
window_to_check = GetParent(window_to_check);
}
return false;
}
// static
BOOL CALLBACK HungPluginAction::DismissMessageBox(HWND window, LPARAM ignore) {
std::wstring class_name = win_util::GetClassNameW(window);
// #32770 is the dialog window class which is the window class of
// the message box being displayed.
if (class_name == L"#32770") {
EndDialog(window, IDNO);
return FALSE;
}
return TRUE;
}
// static
void CALLBACK HungPluginAction::HungWindowResponseCallback(HWND target_window,
UINT message,
ULONG_PTR data,
LRESULT result) {
HungPluginAction* instance = reinterpret_cast<HungPluginAction*>(data);
DCHECK(NULL != instance);
if (NULL != instance) {
instance->OnWindowResponsive(target_window);
}
}
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