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"
25 #include "core/dom/ElementTraversal.h"
26 #include "core/svg/SVGGlyphRefElement.h"
30 inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(Document& document)
31 : SVGElement(SVGNames::altGlyphItemTag, document)
33 ScriptWrappable::init(this);
36 PassRefPtr<SVGAltGlyphItemElement> SVGAltGlyphItemElement::create(Document& document)
38 return adoptRef(new SVGAltGlyphItemElement(document));
41 bool SVGAltGlyphItemElement::hasValidGlyphElements(Vector<AtomicString>& glyphNames) const
43 // Spec: http://www.w3.org/TR/SVG/text.html#AltGlyphItemElement
44 // The ‘altGlyphItem’ element defines a candidate set of possible glyph substitutions.
45 // The first ‘altGlyphItem’ element whose referenced glyphs are all available is chosen.
46 // Its glyphs are rendered instead of the character(s) that are inside of the referencing
47 // ‘altGlyph’ element.
49 // Here we fill glyphNames and return true only if all referenced glyphs are valid and
50 // there is at least one glyph.
51 for (SVGGlyphRefElement* glyph = Traversal<SVGGlyphRefElement>::firstChild(*this); glyph; glyph = Traversal<SVGGlyphRefElement>::nextSibling(*glyph)) {
52 AtomicString referredGlyphName;
53 if (glyph->hasValidGlyphElement(referredGlyphName)) {
54 glyphNames.append(referredGlyphName);
60 return !glyphNames.isEmpty();