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// Copyright (c) 2011 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/browser/tab_contents/tab_contents_observer.h"
#include "ui/gfx/native_widget_types.h"
class TabContents;
class HungRendererDialogHandler;
class HungRendererDialog : private HtmlDialogUIDelegate {
public:
// Shows a hung renderer dialog.
static void ShowHungRendererDialog(TabContents* contents);
// Hides a hung renderer dialog.
static void HideHungRendererDialog(TabContents* contents);
private:
class TabContentsObserverImpl : public TabContentsObserver {
public:
TabContentsObserverImpl(HungRendererDialog* dialog,
TabContents* contents);
// TabContentsObserver overrides:
virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
virtual void TabContentsDestroyed(TabContents* tab) OVERRIDE;
private:
TabContents* contents_; // weak
HungRendererDialog* dialog_; // weak
DISALLOW_COPY_AND_ASSIGN(TabContentsObserverImpl);
};
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(TabContents* contents,
bool is_enabled);
// Shows the hung renderer dialog.
void ShowDialog(TabContents* contents);
// Hides the hung renderer dialog.
void HideDialog(TabContents* contents);
// HtmlDialogUIDelegate methods
virtual bool IsDialogModal() const OVERRIDE;
virtual string16 GetDialogTitle() const OVERRIDE;
virtual GURL GetDialogContentURL() const OVERRIDE;
virtual void GetWebUIMessageHandlers(
std::vector<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(TabContents* source,
bool* out_close_dialog) OVERRIDE;
virtual bool ShouldShowDialogTitle() const OVERRIDE;
// The tab contents.
TabContents* 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<TabContentsObserverImpl> 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 WebUIMessageHandler {
public:
explicit HungRendererDialogHandler(TabContents* contents);
void CloseDialog();
// Overridden from WebUIMessageHandler
virtual void RegisterMessages() OVERRIDE;
private:
void RequestTabContentsList(const base::ListValue* args);
// The tab contents.
TabContents* contents_;
DISALLOW_COPY_AND_ASSIGN(HungRendererDialogHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_HUNG_RENDERER_DIALOG_H_
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