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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_EXTENSIONS_EXTENSION_PREFERENCE_API_H__
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFERENCE_API_H__
#pragma once
#include <string>
#include "chrome/browser/extensions/extension_function.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "content/common/notification_observer.h"
namespace base {
class Value;
}
class ExtensionPreferenceEventRouter : public NotificationObserver {
public:
explicit ExtensionPreferenceEventRouter(Profile* profile);
virtual ~ExtensionPreferenceEventRouter();
private:
// NotificationObserver implementation.
virtual void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details);
void OnPrefChanged(PrefService* pref_service, const std::string& pref_key);
// This method dispatches events to the extension message service.
void DispatchEvent(const std::string& extension_id,
const std::string& event_name,
const std::string& json_args);
PrefChangeRegistrar registrar_;
PrefChangeRegistrar incognito_registrar_;
// Weak, owns us (transitively via ExtensionService).
Profile* profile_;
DISALLOW_COPY_AND_ASSIGN(ExtensionPreferenceEventRouter);
};
class PrefTransformerInterface {
public:
virtual ~PrefTransformerInterface() {}
// Converts the representation of a preference as seen by the extension
// into a representation that is used in the pref stores of the browser.
// Returns the pref store representation in case of success or sets
// |error| and returns NULL otherwise. |bad_message| is passed to simulate
// the behavior of EXTENSION_FUNCTION_VALIDATE. It is never NULL.
// The ownership of the returned value is passed to the caller.
virtual base::Value* ExtensionToBrowserPref(
const base::Value* extension_pref,
std::string* error,
bool* bad_message) = 0;
// Converts the representation of the preference as stored in the browser
// into a representation that is used by the extension.
// Returns the extension representation in case of success or NULL otherwise.
// The ownership of the returned value is passed to the caller.
virtual base::Value* BrowserToExtensionPref(
const base::Value* browser_pref) = 0;
};
class GetPreferenceFunction : public SyncExtensionFunction {
public:
virtual ~GetPreferenceFunction();
virtual bool RunImpl();
DECLARE_EXTENSION_FUNCTION_NAME("types.ChromeSetting.get")
};
class SetPreferenceFunction : public SyncExtensionFunction {
public:
virtual ~SetPreferenceFunction();
virtual bool RunImpl();
DECLARE_EXTENSION_FUNCTION_NAME("types.ChromeSetting.set")
};
class ClearPreferenceFunction : public SyncExtensionFunction {
public:
virtual ~ClearPreferenceFunction();
virtual bool RunImpl();
DECLARE_EXTENSION_FUNCTION_NAME("types.ChromeSetting.clear")
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFERENCE_API_H__
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