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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"
#include "SVGAltGlyphItemElement.h"
#include "ElementChildIteratorInlines.h"
#include "SVGElementTypeHelpers.h"
#include "SVGGlyphRefElement.h"
#include "SVGNames.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGAltGlyphItemElement);
inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(const QualifiedName& tagName, Document& document)
: SVGElement(tagName, document, makeUniqueRef<PropertyRegistry>(*this))
{
ASSERT(hasTagName(SVGNames::altGlyphItemTag));
}
Ref<SVGAltGlyphItemElement> SVGAltGlyphItemElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGAltGlyphItemElement(tagName, document));
}
bool SVGAltGlyphItemElement::hasValidGlyphElements(Vector<String>& 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 (auto& glyphRef : childrenOfType<SVGGlyphRefElement>(*this)) {
String referredGlyphName;
if (glyphRef.hasValidGlyphElement(referredGlyphName))
glyphNames.append(referredGlyphName);
else {
glyphNames.clear();
return false;
}
}
return !glyphNames.isEmpty();
}
}
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