| /* |
| * 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 "SVGNames.h" |
| #include "core/svg/SVGGlyphRefElement.h" |
| |
| namespace WebCore { |
| |
| inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(const QualifiedName& tagName, Document* document) |
| : SVGElement(tagName, document) |
| { |
| ASSERT(hasTagName(SVGNames::altGlyphItemTag)); |
| ScriptWrappable::init(this); |
| } |
| |
| PassRefPtr<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 (Node* child = firstChild(); child; child = child->nextSibling()) { |
| if (child->hasTagName(SVGNames::glyphRefTag)) { |
| String referredGlyphName; |
| if (static_cast<SVGGlyphRefElement*>(child)->hasValidGlyphElement(referredGlyphName)) |
| glyphNames.append(referredGlyphName); |
| else { |
| glyphNames.clear(); |
| return false; |
| } |
| } |
| } |
| return !glyphNames.isEmpty(); |
| } |
| |
| } |
| |
| #endif |