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/*
* Copyright (C) 2008 Apple Inc. 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 SVGGlyphMap_h
#define SVGGlyphMap_h
#if ENABLE(SVG_FONTS)
#include "SVGGlyphElement.h"
namespace WebCore {
struct GlyphMapNode;
typedef HashMap<UChar, RefPtr<GlyphMapNode> > GlyphMapLayer;
struct GlyphMapNode : public RefCounted<GlyphMapNode> {
private:
GlyphMapNode() { }
public:
static PassRefPtr<GlyphMapNode> create() { return adoptRef(new GlyphMapNode); }
Vector<SVGGlyphIdentifier> glyphs;
GlyphMapLayer children;
};
class SVGGlyphMap {
public:
SVGGlyphMap() : m_currentPriority(0) { }
void add(const String& string, const SVGGlyphIdentifier& glyph)
{
size_t len = string.length();
GlyphMapLayer* currentLayer = &m_rootLayer;
RefPtr<GlyphMapNode> node;
for (size_t i = 0; i < len; i++) {
UChar curChar = string[i];
node = currentLayer->get(curChar);
if (!node) {
node = GlyphMapNode::create();
currentLayer->set(curChar, node);
}
currentLayer = &node->children;
}
if (node) {
node->glyphs.append(glyph);
node->glyphs.last().priority = m_currentPriority++;
node->glyphs.last().nameLength = len;
node->glyphs.last().isValid = true;
}
}
static inline bool compareGlyphPriority(const SVGGlyphIdentifier& first, const SVGGlyphIdentifier& second)
{
return first.priority < second.priority;
}
void get(const String& string, Vector<SVGGlyphIdentifier>& glyphs)
{
GlyphMapLayer* currentLayer = &m_rootLayer;
for (size_t i = 0; i < string.length(); i++) {
UChar curChar = string[i];
RefPtr<GlyphMapNode> node = currentLayer->get(curChar);
if (!node)
break;
glyphs.append(node->glyphs);
currentLayer = &node->children;
}
std::sort(glyphs.begin(), glyphs.end(), compareGlyphPriority);
}
void clear()
{
m_rootLayer.clear();
m_currentPriority = 0;
}
private:
GlyphMapLayer m_rootLayer;
int m_currentPriority;
};
}
#endif // ENABLE(SVG_FONTS)
#endif //SVGGlyphMap_h
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