68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
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* Copyright (C) 2011 Leo Yang <leoyang@webkit.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGAltGlyphItemElement.h"
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#include "ElementIterator.h"
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#include "SVGGlyphRefElement.h"
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#include "SVGNames.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(SVGAltGlyphItemElement);
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inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(const QualifiedName& tagName, Document& document)
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: SVGElement(tagName, document)
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{
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ASSERT(hasTagName(SVGNames::altGlyphItemTag));
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}
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Ref<SVGAltGlyphItemElement> SVGAltGlyphItemElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new SVGAltGlyphItemElement(tagName, document));
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}
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bool SVGAltGlyphItemElement::hasValidGlyphElements(Vector<String>& glyphNames) const
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{
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// Spec: http://www.w3.org/TR/SVG/text.html#AltGlyphItemElement
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// The ‘altGlyphItem’ element defines a candidate set of possible glyph substitutions.
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// The first ‘altGlyphItem’ element whose referenced glyphs are all available is chosen.
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// Its glyphs are rendered instead of the character(s) that are inside of the referencing
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// ‘altGlyph’ element.
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//
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// Here we fill glyphNames and return true only if all referenced glyphs are valid and
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// there is at least one glyph.
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for (auto& glyphRef : childrenOfType<SVGGlyphRefElement>(*this)) {
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String referredGlyphName;
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if (glyphRef.hasValidGlyphElement(referredGlyphName))
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glyphNames.append(referredGlyphName);
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else {
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glyphNames.clear();
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return false;
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}
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}
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return !glyphNames.isEmpty();
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}
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}
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