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// Copyright (c) 2012 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_CONTENT_SETTINGS_CONTENT_SETTINGS_STORE_H_
#define CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_STORE_H_
#include <map>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "components/content_settings/core/browser/content_settings_provider.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "extensions/browser/extension_prefs_scope.h"
namespace base {
class ListValue;
}
namespace content_settings {
class OriginIdentifierValueMap;
class RuleIterator;
}
namespace extensions {
// This class is the backend for extension-defined content settings. It is used
// by the content_settings::CustomExtensionProvider to integrate its settings
// into the HostContentSettingsMap and by the content settings extension API to
// provide extensions with access to content settings.
class ContentSettingsStore
: public base::RefCountedThreadSafe<ContentSettingsStore> {
public:
class Observer {
public:
virtual ~Observer() {}
// Called when a content setting changes in the
// ContentSettingsStore.
virtual void OnContentSettingChanged(
const std::string& extension_id,
bool incognito) = 0;
};
ContentSettingsStore();
// //////////////////////////////////////////////////////////////////////////
content_settings::RuleIterator* GetRuleIterator(
ContentSettingsType type,
const content_settings::ResourceIdentifier& identifier,
bool incognito) const;
// Sets the content |setting| for |pattern| of extension |ext_id|. The
// |incognito| flag allow to set whether the provided setting is for
// incognito mode only.
// Precondition: the extension must be registered.
// This method should only be called on the UI thread.
void SetExtensionContentSetting(
const std::string& ext_id,
const ContentSettingsPattern& embedded_pattern,
const ContentSettingsPattern& top_level_pattern,
ContentSettingsType type,
const content_settings::ResourceIdentifier& identifier,
ContentSetting setting,
ExtensionPrefsScope scope);
// Clears all contents settings set by the extension |ext_id|.
void ClearContentSettingsForExtension(const std::string& ext_id,
ExtensionPrefsScope scope);
// Serializes all content settings set by the extension with ID |extension_id|
// and returns them as a ListValue. The caller takes ownership of the returned
// value.
base::ListValue* GetSettingsForExtension(const std::string& extension_id,
ExtensionPrefsScope scope) const;
// Deserializes content settings rules from |list| and applies them as set by
// the extension with ID |extension_id|.
void SetExtensionContentSettingFromList(const std::string& extension_id,
const base::ListValue* list,
ExtensionPrefsScope scope);
// //////////////////////////////////////////////////////////////////////////
// Registers the time when an extension |ext_id| is installed.
void RegisterExtension(const std::string& ext_id,
const base::Time& install_time,
bool is_enabled);
// Deletes all entries related to extension |ext_id|.
void UnregisterExtension(const std::string& ext_id);
// Hides or makes the extension content settings of the specified extension
// visible.
void SetExtensionState(const std::string& ext_id, bool is_enabled);
// Adds |observer|. This method should only be called on the UI thread.
void AddObserver(Observer* observer);
// Remove |observer|. This method should only be called on the UI thread.
void RemoveObserver(Observer* observer);
private:
friend class base::RefCountedThreadSafe<ContentSettingsStore>;
struct ExtensionEntry;
typedef std::multimap<base::Time, ExtensionEntry*> ExtensionEntryMap;
virtual ~ContentSettingsStore();
content_settings::OriginIdentifierValueMap* GetValueMap(
const std::string& ext_id,
ExtensionPrefsScope scope);
const content_settings::OriginIdentifierValueMap* GetValueMap(
const std::string& ext_id,
ExtensionPrefsScope scope) const;
void NotifyOfContentSettingChanged(const std::string& extension_id,
bool incognito);
bool OnCorrectThread();
ExtensionEntryMap::iterator FindEntry(const std::string& ext_id);
ExtensionEntryMap::const_iterator FindEntry(const std::string& ext_id) const;
ExtensionEntryMap entries_;
ObserverList<Observer, false> observers_;
mutable base::Lock lock_;
DISALLOW_COPY_AND_ASSIGN(ContentSettingsStore);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_STORE_H_
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