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// Copyright 2014 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_TASK_MANAGER_WEB_CONTENTS_INFORMATION_H_
#define CHROME_BROWSER_TASK_MANAGER_WEB_CONTENTS_INFORMATION_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace content {
class WebContents;
}
namespace task_manager {
class RendererResource;
// This interface gives a WebContentsResourceProvider information about a
// category of WebContentses owned by some service. The instances are expected
// to be owned by their WebContentsResourceProvider, which will track and adapt
// the WebContentses into TaskManager resources.
class WebContentsInformation {
public:
typedef base::Callback<void(content::WebContents*)> NewWebContentsCallback;
WebContentsInformation();
virtual ~WebContentsInformation();
// Retrieve all known WebContents instances from the service we're tracking.
// Invoke |callback| on each one.
virtual void GetAll(const NewWebContentsCallback& callback) = 0;
// Return true if |web_contents| is from the service we're tracking.
virtual bool CheckOwnership(content::WebContents* web_contents) = 0;
// Start listening to the creation of new WebContents instances from
// the service. While listening, invoke |callback| on each new instance.
virtual void StartObservingCreation(
const NewWebContentsCallback& callback) = 0;
// Stop listening to creation of new WebContents instances.
virtual void StopObservingCreation() = 0;
// Create a new task manager resource for the given WebContents instance.
virtual scoped_ptr<RendererResource> MakeResource(
content::WebContents* web_contents) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(WebContentsInformation);
};
// Implements the observer methods (StartObservingCreation() /
// StopObservingCreation()) of WebContentsInformation using
// NOTIFICATION_WEB_CONTENTS_CONNECTED.
class NotificationObservingWebContentsInformation
: public WebContentsInformation,
public content::NotificationObserver {
public:
NotificationObservingWebContentsInformation();
~NotificationObservingWebContentsInformation() override;
// WebContentsInformation partial implementation.
void StartObservingCreation(const NewWebContentsCallback& callback) override;
void StopObservingCreation() override;
// content::NotificationObserver implementation.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
private:
content::NotificationRegistrar registrar_;
NewWebContentsCallback observer_callback_;
DISALLOW_COPY_AND_ASSIGN(NotificationObservingWebContentsInformation);
};
} // namespace task_manager
#endif // CHROME_BROWSER_TASK_MANAGER_WEB_CONTENTS_INFORMATION_H_
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