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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.
#ifndef CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
#define CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
#pragma once
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/string16.h"
#include "base/values.h"
#include "chrome/browser/ui/webui/html_dialog_ui.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "ui/gfx/native_widget_types.h"
class HungRendererDialogHandler;
class HungRendererDialog : private HtmlDialogUIDelegate {
public:
// Shows a hung renderer dialog.
static void ShowHungRendererDialog(content::WebContents* contents);
// Hides a hung renderer dialog.
static void HideHungRendererDialog(content::WebContents* contents);
private:
class WebContentsObserverImpl : public content::WebContentsObserver {
public:
WebContentsObserverImpl(HungRendererDialog* dialog,
content::WebContents* contents);
// content::WebContentsObserver overrides:
virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
virtual void WebContentsDestroyed(content::WebContents* tab) OVERRIDE;
private:
HungRendererDialog* dialog_; // weak
DISALLOW_COPY_AND_ASSIGN(WebContentsObserverImpl);
};
friend class HungRendererDialogUITest;
explicit HungRendererDialog(bool is_enabled);
virtual ~HungRendererDialog();
// Shows a hung renderer dialog that, if not enabled, won't kill processes
// or restart hang timers.
static void ShowHungRendererDialogInternal(content::WebContents* contents,
bool is_enabled);
// Shows the hung renderer dialog.
void ShowDialog(content::WebContents* contents);
// Hides the hung renderer dialog.
void HideDialog(content::WebContents* contents);
// HtmlDialogUIDelegate methods
virtual ui::ModalType GetDialogModalType() const OVERRIDE;
virtual string16 GetDialogTitle() const OVERRIDE;
virtual GURL GetDialogContentURL() const OVERRIDE;
virtual void GetWebUIMessageHandlers(
std::vector<content::WebUIMessageHandler*>* handlers) const OVERRIDE;
virtual void GetDialogSize(gfx::Size* size) const OVERRIDE;
virtual std::string GetDialogArgs() const OVERRIDE;
virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE;
virtual void OnCloseContents(content::WebContents* source,
bool* out_close_dialog) OVERRIDE;
virtual bool ShouldShowDialogTitle() const OVERRIDE;
// The web contents.
content::WebContents* contents_;
// The dialog handler.
HungRendererDialogHandler* handler_;
// A safety switch that must be enabled to allow actual killing of processes
// or restarting of the hang timer. This is necessary so that tests can
// create a disabled version of this dialog that won't kill processes or
// restart timers when the dialog closes at the end of the test.
bool is_enabled_;
// The dialog window.
gfx::NativeWindow window_;
scoped_ptr<WebContentsObserverImpl> contents_observer_;
DISALLOW_COPY_AND_ASSIGN(HungRendererDialog);
};
// Dialog handler that handles calls from the JS WebUI code to get the details
// of the list of frozen tabs.
class HungRendererDialogHandler : public content::WebUIMessageHandler {
public:
explicit HungRendererDialogHandler(content::WebContents* contents);
void CloseDialog();
// Overridden from WebUIMessageHandler
virtual void RegisterMessages() OVERRIDE;
private:
void RequestTabContentsList(const base::ListValue* args);
// The web contents.
content::WebContents* contents_;
DISALLOW_COPY_AND_ASSIGN(HungRendererDialogHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
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