// Copyright 2014 The Chromium Authors. All rights reserved.
// 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:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * 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.
//    * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#pragma once

#include "CSSParserTokenRange.h"
#include "CSSPrimitiveValue.h"
#include <wtf/text/WTFString.h>

namespace WebCore {

class CSSValue;
class Document;
class MediaQuerySet;
    
class SizesAttributeParser {
public:
    SizesAttributeParser(const String&, const Document&);

    float length();

    static float defaultLength(const Document&);
    static float computeLength(double value, CSSPrimitiveValue::UnitType, const Document&);

private:
    bool parse(CSSParserTokenRange);
    float effectiveSize();
    bool calculateLengthInPixels(CSSParserTokenRange, float& result);
    bool mediaConditionMatches(const MediaQuerySet& mediaCondition);
    unsigned effectiveSizeDefaultValue();

    const Document& m_document;
    RefPtr<MediaQuerySet> m_mediaCondition;
    float m_length;
    bool m_lengthWasSet;
    bool m_isValid;
};

} // namespace WebCore