/*
 * Copyright (C) 2011 Google 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.
 *
 */

#ifndef StyleGridData_h
#define StyleGridData_h

#include "core/style/GridArea.h"
#include "core/style/GridTrackSize.h"
#include "core/style/ComputedStyleConstants.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"

namespace blink {

typedef HashMap<String, Vector<size_t>> NamedGridLinesMap;
typedef HashMap<size_t, Vector<String>, WTF::IntHash<size_t>, WTF::UnsignedWithZeroKeyHashTraits<size_t>> OrderedNamedGridLines;

class StyleGridData : public RefCounted<StyleGridData> {
public:
    static PassRefPtr<StyleGridData> create() { return adoptRef(new StyleGridData); }
    PassRefPtr<StyleGridData> copy() const { return adoptRef(new StyleGridData(*this)); }

    bool operator==(const StyleGridData& o) const
    {
        return m_gridTemplateColumns == o.m_gridTemplateColumns && m_gridTemplateRows == o.m_gridTemplateRows
        && m_gridAutoFlow == o.m_gridAutoFlow && m_gridAutoRows == o.m_gridAutoRows && m_gridAutoColumns == o.m_gridAutoColumns
        && m_namedGridColumnLines == o.m_namedGridColumnLines && m_namedGridRowLines == o.m_namedGridRowLines
        && m_orderedNamedGridColumnLines == o.m_orderedNamedGridColumnLines && m_orderedNamedGridRowLines == o.m_orderedNamedGridRowLines
        && m_namedGridArea == o.m_namedGridArea && m_namedGridArea == o.m_namedGridArea
        && m_namedGridAreaRowCount == o.m_namedGridAreaRowCount && m_namedGridAreaColumnCount == o.m_namedGridAreaColumnCount
        && m_gridColumnGap == o.m_gridColumnGap && m_gridRowGap == o.m_gridRowGap;
    }

    bool operator!=(const StyleGridData& o) const
    {
        return !(*this == o);
    }

    Vector<GridTrackSize> m_gridTemplateColumns;
    Vector<GridTrackSize> m_gridTemplateRows;

    NamedGridLinesMap m_namedGridColumnLines;
    NamedGridLinesMap m_namedGridRowLines;

    // In order to reconstruct the original named grid line order, we can't rely on NamedGridLinesMap
    // as it loses the position if multiple grid lines are set on a single track.
    OrderedNamedGridLines m_orderedNamedGridColumnLines;
    OrderedNamedGridLines m_orderedNamedGridRowLines;

    unsigned m_gridAutoFlow : GridAutoFlowBits;

    GridTrackSize m_gridAutoRows;
    GridTrackSize m_gridAutoColumns;

    NamedGridAreaMap m_namedGridArea;
    // Because m_namedGridArea doesn't store the unnamed grid areas, we need to keep track
    // of the explicit grid size defined by both named and unnamed grid areas.
    size_t m_namedGridAreaRowCount;
    size_t m_namedGridAreaColumnCount;

    Length m_gridColumnGap;
    Length m_gridRowGap;

private:
    StyleGridData();
    StyleGridData(const StyleGridData&);
};

} // namespace blink

#endif // StyleGridData_h