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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 CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_
#define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/synchronization/lock.h"
#include "base/values.h"
#include "chrome/common/content_settings_pattern.h"
namespace content_settings {
struct Rule {
Rule();
// Rule takes ownership of |value|.
Rule(const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
base::Value* value);
~Rule();
ContentSettingsPattern primary_pattern;
ContentSettingsPattern secondary_pattern;
linked_ptr<base::Value> value;
};
class RuleIterator {
public:
virtual ~RuleIterator();
virtual bool HasNext() const = 0;
virtual Rule Next() = 0;
};
class EmptyRuleIterator : public RuleIterator {
public:
virtual ~EmptyRuleIterator();
virtual bool HasNext() const OVERRIDE;
virtual Rule Next() OVERRIDE;
};
class ConcatenationIterator : public RuleIterator {
public:
// ConcatenationIterator takes ownership of the pointers in the |iterators|
// list and |auto_lock|. |auto_lock| can be NULL if no locking is needed.
ConcatenationIterator(ScopedVector<RuleIterator>* iterators,
base::AutoLock* auto_lock);
virtual ~ConcatenationIterator();
virtual bool HasNext() const OVERRIDE;
virtual Rule Next() OVERRIDE;
private:
ScopedVector<RuleIterator> iterators_;
scoped_ptr<base::AutoLock> auto_lock_;
};
} // namespace content_settings
#endif // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_
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