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// Copyright (c) 2012 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 "chrome/browser/ui/webui/hung_renderer_dialog.h"
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/json/json_reader.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_dialogs.h"
#include "chrome/browser/ui/dialog_style.h"
#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
#include "chrome/browser/ui/webui/chrome_web_ui.h"
#include "chrome/browser/ui/webui/html_dialog_ui.h"
#include "chrome/common/logging_chrome.h"
#include "chrome/common/url_constants.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/result_codes.h"
#include "grit/generated_resources.h"
#include "ui/base/l10n/l10n_util.h"
using content::WebContents;
using content::WebUIMessageHandler;
namespace {
HungRendererDialog* g_instance = NULL;
const int kHungRendererDialogWidth = 425;
const int kHungRendererDialogHeight = 200;
}
namespace browser {
void ShowHungRendererDialog(WebContents* contents) {
// TODO(jhawkins): move this into a non-webui location.
#if defined(USE_AURA)
ShowNativeHungRendererDialog(contents);
#elif defined(OS_CHROMEOS)
HungRendererDialog::ShowHungRendererDialog(contents);
#else
// TODO(rbyers): Remove IsMoreWebUI check once we decide for sure which
// platforms will use the WebUI version of this dialog.
if (chrome_web_ui::IsMoreWebUI())
HungRendererDialog::ShowHungRendererDialog(contents);
else
ShowNativeHungRendererDialog(contents);
#endif
}
void HideHungRendererDialog(WebContents* contents) {
#if defined(USE_AURA)
HideNativeHungRendererDialog(contents);
#elif defined(OS_CHROMEOS)
HungRendererDialog::HideHungRendererDialog(contents);
#else
if (chrome_web_ui::IsMoreWebUI())
HungRendererDialog::HideHungRendererDialog(contents);
else
HideNativeHungRendererDialog(contents);
#endif
}
} // namespace browser
////////////////////////////////////////////////////////////////////////////////
// HungRendererDialog public static methods
void HungRendererDialog::ShowHungRendererDialog(WebContents* contents) {
ShowHungRendererDialogInternal(contents, true);
}
void HungRendererDialog::HideHungRendererDialog(WebContents* contents) {
if (!logging::DialogsAreSuppressed() && g_instance)
g_instance->HideDialog(contents);
}
////////////////////////////////////////////////////////////////////////////////
// HungRendererDialog::WebContentsObserverImpl
HungRendererDialog::WebContentsObserverImpl::WebContentsObserverImpl(
HungRendererDialog* dialog,
WebContents* contents)
: content::WebContentsObserver(contents),
dialog_(dialog) {
}
void HungRendererDialog::WebContentsObserverImpl::RenderViewGone(
base::TerminationStatus status) {
dialog_->HideDialog(web_contents());
}
void HungRendererDialog::WebContentsObserverImpl::WebContentsDestroyed(
WebContents* tab) {
dialog_->HideDialog(tab);
}
////////////////////////////////////////////////////////////////////////////////
// HungRendererDialog private methods
HungRendererDialog::HungRendererDialog(bool is_enabled)
: contents_(NULL),
handler_(NULL),
is_enabled_(is_enabled),
window_(NULL) {
}
HungRendererDialog::~HungRendererDialog() {
}
void HungRendererDialog::ShowHungRendererDialogInternal(WebContents* contents,
bool is_enabled) {
if (!logging::DialogsAreSuppressed()) {
if (g_instance)
return;
g_instance = new HungRendererDialog(is_enabled);
g_instance->ShowDialog(contents);
}
}
void HungRendererDialog::ShowDialog(WebContents* contents) {
DCHECK(contents);
contents_ = contents;
Browser* browser = BrowserList::GetLastActive();
DCHECK(browser);
handler_ = new HungRendererDialogHandler(contents_);
window_ = browser->BrowserShowHtmlDialog(this, NULL, STYLE_GENERIC);
contents_observer_.reset(new WebContentsObserverImpl(this, contents_));
}
void HungRendererDialog::HideDialog(WebContents* contents) {
DCHECK(contents);
// Don't close the dialog if it's a WebContents for some other renderer.
if (contents_ && contents_->GetRenderProcessHost() !=
contents->GetRenderProcessHost())
return;
// Settings |contents_| to NULL prevents the hang monitor from restarting.
// We do this because the close dialog handler runs whether it is trigged by
// the user closing the box, or by being closed externally with widget->Close.
contents_observer_.reset();
contents_ = NULL;
DCHECK(handler_);
handler_->CloseDialog();
}
ui::ModalType HungRendererDialog::GetDialogModalType() const {
return ui::MODAL_TYPE_NONE;
}
string16 HungRendererDialog::GetDialogTitle() const {
return l10n_util::GetStringUTF16(IDS_BROWSER_HANGMONITOR_RENDERER_TITLE);
}
GURL HungRendererDialog::GetDialogContentURL() const {
return GURL(chrome::kChromeUIHungRendererDialogURL);
}
void HungRendererDialog::GetWebUIMessageHandlers(
std::vector<WebUIMessageHandler*>* handlers) const {
handlers->push_back(handler_);
}
void HungRendererDialog::GetDialogSize(gfx::Size* size) const {
size->SetSize(kHungRendererDialogWidth, kHungRendererDialogHeight);
}
std::string HungRendererDialog::GetDialogArgs() const {
return std::string(); // There are no args used.
}
void HungRendererDialog::OnDialogClosed(const std::string& json_retval) {
if (is_enabled_) {
// Figure out what the response was.
scoped_ptr<Value> root(base::JSONReader::Read(json_retval, false));
bool response = false;
ListValue* list = NULL;
// If the dialog closes because of a button click then the json is a list
// containing a single bool. If the dialog closes some other way, then we
// assume it means no permission was given to kill tabs.
if (root.get() && root->GetAsList(&list) && list &&
list->GetBoolean(0, &response) && response) {
// The user indicated that it is OK to kill the renderer process.
if (contents_ && contents_->GetRenderProcessHost()) {
base::KillProcess(contents_->GetRenderProcessHost()->GetHandle(),
content::RESULT_CODE_HUNG, false);
}
} else {
// No indication from the user that it is ok to kill anything. Just wait.
// Start waiting again for responsiveness.
if (contents_ && contents_->GetRenderViewHost())
contents_->GetRenderViewHost()->RestartHangMonitorTimeout();
}
}
g_instance = NULL;
delete this;
}
void HungRendererDialog::OnCloseContents(WebContents* source,
bool* out_close_dialog) {
NOTIMPLEMENTED();
}
bool HungRendererDialog::ShouldShowDialogTitle() const {
return true;
}
////////////////////////////////////////////////////////////////////////////////
// HungRendererDialogHandler methods
HungRendererDialogHandler::HungRendererDialogHandler(
WebContents* contents)
: contents_(contents) {
}
void HungRendererDialogHandler::CloseDialog() {
static_cast<HtmlDialogUI*>(web_ui()->GetController())->CloseDialog(NULL);
}
void HungRendererDialogHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback("requestTabContentsList",
base::Bind(&HungRendererDialogHandler::RequestTabContentsList,
base::Unretained(this)));
}
void HungRendererDialogHandler::RequestTabContentsList(
const base::ListValue* args) {
ListValue tab_contents_list;
for (TabContentsIterator it; !it.done(); ++it) {
if (it->web_contents()->GetRenderProcessHost() ==
contents_->GetRenderProcessHost()) {
string16 title = it->web_contents()->GetTitle();
if (title.empty())
title = CoreTabHelper::GetDefaultTitle();
// Add details for |url| and |title|.
DictionaryValue* dict = new DictionaryValue();
dict->SetString("url", it->web_contents()->GetURL().spec());
dict->SetString("title", title);
tab_contents_list.Append(dict);
}
}
// Send list of tab contents details to javascript.
web_ui()->CallJavascriptFunction("hungRendererDialog.setTabContentsList",
tab_contents_list);
}
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