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// Copyright (c) 2013 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_EXTENSIONS_API_POWER_POWER_API_MANAGER_H_
#define CHROME_BROWSER_EXTENSIONS_API_POWER_POWER_API_MANAGER_H_
#include <map>
#include <string>
#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/common/extensions/api/power.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/power_save_blocker.h"
#include "extensions/browser/browser_context_keyed_api_factory.h"
#include "extensions/browser/extension_registry_observer.h"
namespace content {
class BrowserContext;
}
namespace extensions {
// Handles calls made via the chrome.power API. There is a separate instance of
// this class for each profile, as requests are tracked by extension ID, but a
// regular and incognito profile will share the same instance.
// TODO(derat): Move this to power_api.h and rename it to PowerApi.
class PowerApiManager : public BrowserContextKeyedAPI,
public content::NotificationObserver,
public extensions::ExtensionRegistryObserver {
public:
typedef base::Callback<scoped_ptr<content::PowerSaveBlocker>(
content::PowerSaveBlocker::PowerSaveBlockerType,
const std::string&)> CreateBlockerFunction;
static PowerApiManager* Get(content::BrowserContext* context);
// BrowserContextKeyedAPI implementation.
static BrowserContextKeyedAPIFactory<PowerApiManager>* GetFactoryInstance();
// Adds an extension lock at |level| for |extension_id|, replacing the
// extension's existing lock, if any.
void AddRequest(const std::string& extension_id, api::power::Level level);
// Removes an extension lock for an extension. Calling this for an
// extension id without a lock will do nothing.
void RemoveRequest(const std::string& extension_id);
// Replaces the function that will be called to create PowerSaveBlocker
// objects. Passing an empty callback will revert to the default.
void SetCreateBlockerFunctionForTesting(CreateBlockerFunction function);
// Overridden from content::NotificationObserver.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
// Overridden from extensions::ExtensionRegistryObserver.
virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason)
OVERRIDE;
private:
friend class BrowserContextKeyedAPIFactory<PowerApiManager>;
explicit PowerApiManager(content::BrowserContext* context);
virtual ~PowerApiManager();
// Updates |power_save_blocker_| and |current_level_| after iterating
// over |extension_levels_|.
void UpdatePowerSaveBlocker();
// BrowserContextKeyedAPI implementation.
static const char* service_name() { return "PowerApiManager"; }
static const bool kServiceRedirectedInIncognito = true;
static const bool kServiceIsCreatedWithBrowserContext = false;
virtual void Shutdown() OVERRIDE;
content::BrowserContext* browser_context_;
content::NotificationRegistrar registrar_;
// Function that should be called to create PowerSaveBlocker objects.
// Tests can change this to record what would've been done instead of
// actually changing the system power-saving settings.
CreateBlockerFunction create_blocker_function_;
scoped_ptr<content::PowerSaveBlocker> power_save_blocker_;
// Current level used by |power_save_blocker_|. Meaningless if
// |power_save_blocker_| is NULL.
api::power::Level current_level_;
// Map from extension ID to the corresponding level for each extension
// that has an outstanding request.
typedef std::map<std::string, api::power::Level> ExtensionLevelMap;
ExtensionLevelMap extension_levels_;
DISALLOW_COPY_AND_ASSIGN(PowerApiManager);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_POWER_POWER_API_MANAGER_H_
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