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 <wtf/text/WTFString.h> 24 25namespace WebCore { 26 27class RenderSVGInlineText; 28class SVGTextLayoutAttributes; 29class TextRun; 30 31class SVGTextMetrics { 32public: 33 enum MetricsType { SkippedSpaceMetrics }; 34 35 SVGTextMetrics(); 36 explicit SVGTextMetrics(MetricsType); 37 SVGTextMetrics(RenderSVGInlineText&, unsigned position, unsigned length, float width, const String& glyphName); 38 39 static SVGTextMetrics measureCharacterRange(RenderSVGInlineText&, unsigned position, unsigned length); 40 static TextRun constructTextRun(RenderSVGInlineText&, unsigned position = 0, unsigned length = std::numeric_limits<unsigned>::max()); 41 42 bool isEmpty() const { return !m_width && !m_height && !m_glyph.isValid && m_length == 1; } 43 44 float width() const { return m_width; } 45 void setWidth(float width) { m_width = width; } 46 47 float height() const { return m_height; } 48 unsigned length() const { return m_length; } 49 50 struct Glyph { 51 Glyph() 52 : isValid(false) 53 { 54 } 55 56 bool operator==(const Glyph& other) 57 { 58 return isValid == other.isValid 59 && name == other.name 60 && unicodeString == other.unicodeString; 61 } 62 63 bool isValid; 64 String name; 65 String unicodeString; 66 }; 67 68 // Only useful when measuring individual characters, to lookup ligatures. 69 const Glyph& glyph() const { return m_glyph; } 70 71private: 72 SVGTextMetrics(RenderSVGInlineText&, const TextRun&); 73 74 float m_width; 75 float m_height; 76 unsigned m_length; 77 Glyph m_glyph; 78}; 79 80} // namespace WebCore 81 82#endif 83