/*
 * Copyright (C) 2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "ExceptionOr.h"
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class Node;
class Range;

class StaticRange : public RefCounted<StaticRange> {
public:
    ~StaticRange();

    static Ref<StaticRange> createFromRange(const Range&);
    static Ref<StaticRange> create(Ref<Node>&& startContainer, unsigned startOffset, Ref<Node>&& endContainer, unsigned endOffset);

    struct Init {
        RefPtr<Node> startContainer;
        unsigned long startOffset { 0 };
        RefPtr<Node> endContainer;
        unsigned long endOffset { 0 };
    };

    static ExceptionOr<Ref<StaticRange>> create(Init&&);

    unsigned startOffset() const { return m_startOffset; }
    unsigned endOffset() const { return m_endOffset; }
    Node* startContainer() const;
    Node* endContainer() const;
    bool collapsed() const;
    
    bool operator==(const StaticRange&) const;

private:
    StaticRange(Ref<Node>&& startContainer, unsigned startOffset, Ref<Node>&& endContainer, unsigned endOffset);

    Ref<Node> m_startContainer;
    unsigned m_startOffset;
    Ref<Node> m_endContainer;
    unsigned m_endOffset;
};

}
