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/*
* Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef SVGTextMetrics_h
#define SVGTextMetrics_h
#include <wtf/text/WTFString.h>
namespace WebCore {
class RenderSVGInlineText;
class SVGTextLayoutAttributes;
class TextRun;
class SVGTextMetrics {
public:
enum MetricsType { SkippedSpaceMetrics };
SVGTextMetrics();
explicit SVGTextMetrics(MetricsType);
SVGTextMetrics(RenderSVGInlineText&, unsigned position, unsigned length, float width, const String& glyphName);
static SVGTextMetrics measureCharacterRange(RenderSVGInlineText&, unsigned position, unsigned length);
static TextRun constructTextRun(RenderSVGInlineText&, unsigned position = 0, unsigned length = std::numeric_limits<unsigned>::max());
bool isEmpty() const { return !m_width && !m_height && !m_glyph.isValid && m_length == 1; }
float width() const { return m_width; }
void setWidth(float width) { m_width = width; }
float height() const { return m_height; }
unsigned length() const { return m_length; }
struct Glyph {
Glyph()
: isValid(false)
{
}
bool operator==(const Glyph& other)
{
return isValid == other.isValid
&& name == other.name
&& unicodeString == other.unicodeString;
}
bool isValid;
String name;
String unicodeString;
};
// Only useful when measuring individual characters, to lookup ligatures.
const Glyph& glyph() const { return m_glyph; }
private:
SVGTextMetrics(RenderSVGInlineText&, const TextRun&);
float m_width;
float m_height;
unsigned m_length;
Glyph m_glyph;
};
} // namespace WebCore
#endif
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