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/*
* Copyright (C) 2011 Leo Yang <leoyang@webkit.org>
*
* 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.
*/
#include "config.h"
#if ENABLE(SVG_FONTS)
#include "core/svg/SVGAltGlyphItemElement.h"
#include "core/dom/ElementTraversal.h"
#include "core/svg/SVGGlyphRefElement.h"
namespace WebCore {
inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(Document& document)
: SVGElement(SVGNames::altGlyphItemTag, document)
{
ScriptWrappable::init(this);
}
DEFINE_NODE_FACTORY(SVGAltGlyphItemElement)
bool SVGAltGlyphItemElement::hasValidGlyphElements(Vector<AtomicString>& glyphNames) const
{
// Spec: http://www.w3.org/TR/SVG/text.html#AltGlyphItemElement
// The ‘altGlyphItem’ element defines a candidate set of possible glyph substitutions.
// The first ‘altGlyphItem’ element whose referenced glyphs are all available is chosen.
// Its glyphs are rendered instead of the character(s) that are inside of the referencing
// ‘altGlyph’ element.
//
// Here we fill glyphNames and return true only if all referenced glyphs are valid and
// there is at least one glyph.
for (SVGGlyphRefElement* glyph = Traversal<SVGGlyphRefElement>::firstChild(*this); glyph; glyph = Traversal<SVGGlyphRefElement>::nextSibling(*glyph)) {
AtomicString referredGlyphName;
if (glyph->hasValidGlyphElement(referredGlyphName)) {
glyphNames.append(referredGlyphName);
} else {
glyphNames.clear();
return false;
}
}
return !glyphNames.isEmpty();
}
}
#endif
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