third_party/WebKit/Source/core/layout/svg/SVGTextLayoutAttributes.h

   1 /*
   2  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public License
  15  * along with this library; see the file COPYING.LIB.  If not, write to
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifndef SVGTextLayoutAttributes_h
  21 #define SVGTextLayoutAttributes_h
  22
  23 #include "core/layout/svg/SVGTextMetrics.h"
  24 #include "wtf/Allocator.h"
  25 #include "wtf/HashMap.h"
  26 #include "wtf/MathExtras.h"
  27 #include "wtf/Noncopyable.h"
  28 #include "wtf/Vector.h"
  29
  30 namespace blink {
  31
  32 class LayoutSVGInlineText;
  33
  34 struct SVGCharacterData {
  35     ALLOW_ONLY_INLINE_ALLOCATION();
  36     SVGCharacterData();
  37
  38     float x;
  39     float y;
  40     float dx;
  41     float dy;
  42     float rotate;
  43 };
  44
  45 typedef HashMap<unsigned, SVGCharacterData> SVGCharacterDataMap;
  46
  47 class SVGTextLayoutAttributes {
  48     DISALLOW_ALLOCATION();
  49     WTF_MAKE_NONCOPYABLE(SVGTextLayoutAttributes);
  50 public:
  51     SVGTextLayoutAttributes(LayoutSVGInlineText*);
  52
  53     void clear();
  54     static float emptyValue() { return std::numeric_limits<float>::quiet_NaN(); }
  55     static bool isEmptyValue(float value) { return std::isnan(value); }
  56
  57     LayoutSVGInlineText* context() const { return m_context; }
  58
  59     SVGCharacterDataMap& characterDataMap() { return m_characterDataMap; }
  60     const SVGCharacterDataMap& characterDataMap() const { return m_characterDataMap; }
  61
  62     Vector<SVGTextMetrics>& textMetricsValues() { return m_textMetricsValues; }
  63     const Vector<SVGTextMetrics>& textMetricsValues() const { return m_textMetricsValues; }
  64
  65 private:
  66     LayoutSVGInlineText* m_context;
  67     SVGCharacterDataMap m_characterDataMap;
  68     Vector<SVGTextMetrics> m_textMetricsValues;
  69 };
  70
  71 inline SVGCharacterData::SVGCharacterData()
  72     : x(SVGTextLayoutAttributes::emptyValue())
  73     , y(SVGTextLayoutAttributes::emptyValue())
  74     , dx(SVGTextLayoutAttributes::emptyValue())
  75     , dy(SVGTextLayoutAttributes::emptyValue())
  76     , rotate(SVGTextLayoutAttributes::emptyValue())
  77 {
  78 }
  79
  80 } // namespace blink
  81
  82 #endif