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

   1 /*
   2  * Copyright (C) Research In Motion Limited 2010-2012. 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 SVGTextMetrics_h
  21 #define SVGTextMetrics_h
  22
  23 #include "platform/text/TextDirection.h"
  24 #include "wtf/Allocator.h"
  25
  26 namespace blink {
  27
  28 class LayoutSVGInlineText;
  29 class TextRun;
  30
  31 class SVGTextMetrics {
  32     ALLOW_ONLY_INLINE_ALLOCATION();
  33 public:
  34     enum MetricsType {
  35         SkippedSpaceMetrics
  36     };
  37
  38     SVGTextMetrics();
  39     SVGTextMetrics(MetricsType);
  40     SVGTextMetrics(LayoutSVGInlineText*, unsigned length, float width);
  41
  42     static SVGTextMetrics measureCharacterRange(LayoutSVGInlineText*, unsigned position, unsigned length, TextDirection);
  43     static TextRun constructTextRun(LayoutSVGInlineText*, unsigned position, unsigned length, TextDirection);
  44
  45     bool isEmpty() const { return !m_width && !m_height && m_length <= 1; }
  46
  47     float width() const { return m_width; }
  48     void setWidth(float width) { m_width = width; }
  49
  50     float height() const { return m_height; }
  51     unsigned length() const { return m_length; }
  52
  53 private:
  54     SVGTextMetrics(LayoutSVGInlineText*, const TextRun&);
  55
  56     float m_width;
  57     float m_height;
  58     unsigned m_length;
  59 };
  60
  61 } // namespace blink
  62
  63 #endif