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// Copyright 2015 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 EXTENSIONS_BROWSER_EVENT_PAGE_TRACKER_H_
#define EXTENSIONS_BROWSER_EVENT_PAGE_TRACKER_H_
#include <string>
#include "base/callback.h"
namespace extensions {
class Extension;
class ExtensionHost;
// Tracks an extension's event page suspend state.
class EventPageTracker {
public:
// Returns true if an extension's event page is active,
// or false if it is suspended.
virtual bool IsEventPageSuspended(const std::string& extension_id) = 0;
// Wakes an extension's event page from a suspended state and calls
// |callback| after it is reactivated.
//
// |callback| will be passed true if the extension was reactivated
// successfully, or false if an error occurred.
//
// Returns true if a wake operation was scheduled successfully,
// or false if the event page was already awake.
// Callback will be run asynchronously if true, and never run if false.
virtual bool WakeEventPage(const std::string& extension_id,
const base::Callback<void(bool)>& callback) = 0;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_EVENT_PAGE_TRACKER_H_
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