2 * Copyright (C) 2011 Leo Yang <leoyang@webkit.org>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
23 #include "core/svg/SVGAltGlyphItemElement.h"
26 #include "core/svg/SVGGlyphRefElement.h"
30 inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(const QualifiedName& tagName, Document& document)
31 : SVGElement(tagName, document)
33 ASSERT(hasTagName(SVGNames::altGlyphItemTag));
34 ScriptWrappable::init(this);
37 PassRefPtr<SVGAltGlyphItemElement> SVGAltGlyphItemElement::create(const QualifiedName& tagName, Document& document)
39 return adoptRef(new SVGAltGlyphItemElement(tagName, document));
42 bool SVGAltGlyphItemElement::hasValidGlyphElements(Vector<String>& glyphNames) const
44 // Spec: http://www.w3.org/TR/SVG/text.html#AltGlyphItemElement
45 // The ‘altGlyphItem’ element defines a candidate set of possible glyph substitutions.
46 // The first ‘altGlyphItem’ element whose referenced glyphs are all available is chosen.
47 // Its glyphs are rendered instead of the character(s) that are inside of the referencing
48 // ‘altGlyph’ element.
50 // Here we fill glyphNames and return true only if all referenced glyphs are valid and
51 // there is at least one glyph.
52 for (Node* child = firstChild(); child; child = child->nextSibling()) {
53 if (child->hasTagName(SVGNames::glyphRefTag)) {
54 String referredGlyphName;
55 if (toSVGGlyphRefElement(child)->hasValidGlyphElement(referredGlyphName))
56 glyphNames.append(referredGlyphName);
63 return !glyphNames.isEmpty();