third_party/WebKit/Source/core/html/HTMLDimension.h

   1 /*
   2  * Copyright (C) 2013 Google 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,
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  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef HTMLDimension_h
  32 #define HTMLDimension_h
  33
  34 #include "core/CoreExport.h"
  35 #include "wtf/Allocator.h"
  36 #include "wtf/Forward.h"
  37 #include "wtf/Vector.h"
  38
  39 namespace blink {
  40
  41 // This class corresponds to a dimension as described in HTML5 by the
  42 // "rules for parsing a list of dimensions" (section 2.4.4.6).
  43 class HTMLDimension {
  44     ALLOW_ONLY_INLINE_ALLOCATION();
  45 public:
  46     enum HTMLDimensionType {
  47         Relative, Percentage, Absolute
  48     };
  49
  50     HTMLDimension()
  51         : m_type(Absolute)
  52         , m_value(0)
  53     {
  54     }
  55
  56     HTMLDimension(double value, HTMLDimensionType type)
  57         : m_type(type)
  58         , m_value(value)
  59     {
  60     }
  61
  62     HTMLDimensionType type() const { return m_type; }
  63
  64     bool isRelative() const { return m_type == Relative; }
  65     bool isPercentage() const { return m_type == Percentage; }
  66     bool isAbsolute() const { return m_type == Absolute; }
  67
  68     double value() const { return m_value; }
  69
  70     bool operator==(const HTMLDimension& other) const
  71     {
  72         return m_type == other.m_type && m_value == other.m_value;
  73     }
  74     bool operator!=(const HTMLDimension& other) const { return !(*this == other); }
  75
  76 private:
  77     HTMLDimensionType m_type;
  78     double m_value;
  79 };
  80
  81 CORE_EXPORT Vector<HTMLDimension> parseListOfDimensions(const String&);
  82
  83 } // namespace blink
  84
  85 #endif // HTMLDimension_h