1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Copyright (C) 2016 Apple Inc. All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8// * Redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above
11// copyright notice, this list of conditions and the following disclaimer
12// in the documentation and/or other materials provided with the
13// distribution.
14// * Neither the name of Google Inc. nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30#pragma once
31
32#include "CSSParserTokenRange.h"
33#include "CSSPrimitiveValue.h"
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38class CSSValue;
39class Document;
40class MediaQuerySet;
41
42class SizesAttributeParser {
43public:
44 SizesAttributeParser(const String&, const Document&);
45
46 float length();
47
48 static float defaultLength(const Document&);
49 static float computeLength(double value, CSSPrimitiveValue::UnitType, const Document&);
50
51private:
52 bool parse(CSSParserTokenRange);
53 float effectiveSize();
54 bool calculateLengthInPixels(CSSParserTokenRange, float& result);
55 bool mediaConditionMatches(const MediaQuerySet& mediaCondition);
56 unsigned effectiveSizeDefaultValue();
57
58 const Document& m_document;
59 RefPtr<MediaQuerySet> m_mediaCondition;
60 float m_length;
61 bool m_lengthWasSet;
62 bool m_isValid;
63};
64
65} // namespace WebCore
66