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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.
// Interface for objects providing content setting rules.
#ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_PROVIDER_H_
#define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_PROVIDER_H_
#include <memory>
#include "base/values.h"
#include "components/content_settings/core/browser/content_settings_rule.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/content_settings/core/common/content_settings_constraints.h"
class ContentSettingsPattern;
namespace content_settings {
class RuleIterator;
class ProviderInterface {
public:
virtual ~ProviderInterface() = default;
// Returns a |RuleIterator| over the content setting rules stored by this
// provider. If |incognito| is true, the iterator returns only the content
// settings which are applicable to the incognito mode and differ from the
// normal mode. Otherwise, it returns the content settings for the normal
// mode. It is not allowed to call other |ProviderInterface| functions
// (including |GetRuleIterator|) for the same provider until the
// |RuleIterator| is destroyed.
// Returns nullptr to indicate the RuleIterator is empty.
//
// This method needs to be thread-safe and continue to work after
// |ShutdownOnUIThread| has been called.
virtual std::unique_ptr<RuleIterator> GetRuleIterator(
ContentSettingsType content_type,
bool incognito) const = 0;
// Asks the provider to set the website setting for a particular
// |primary_pattern|, |secondary_pattern|, |content_type| tuple. If the
// provider accepts the setting it returns true and takes the ownership of the
// |value|. Otherwise false is returned and the ownership of the |value| stays
// with the caller.
//
// This should only be called on the UI thread, and not after
// ShutdownOnUIThread has been called.
virtual bool SetWebsiteSetting(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
base::Value&& value,
const ContentSettingConstraints& constraints) = 0;
// Resets all content settings for the given |content_type| and empty resource
// identifier to CONTENT_SETTING_DEFAULT.
//
// This should only be called on the UI thread, and not after
// ShutdownOnUIThread has been called.
virtual void ClearAllContentSettingsRules(
ContentSettingsType content_type) = 0;
// Detaches the Provider from all Profile-related objects like PrefService.
// This methods needs to be called before destroying the Profile.
// Afterwards, none of the methods above that should only be called on the UI
// thread should be called anymore.
virtual void ShutdownOnUIThread() = 0;
};
} // namespace content_settings
#endif // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_PROVIDER_H_
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