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      1 /*
      2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      3  *
      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.
      8  *
      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.
     13  *
     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.
     18  */
     19 
     20 #include "config.h"
     21 
     22 #if ENABLE(SVG_FONTS)
     23 #include "core/svg/SVGVKernElement.h"
     24 
     25 #include "SVGNames.h"
     26 #include "core/svg/SVGFontElement.h"
     27 #include "core/svg/SVGParserUtilities.h"
     28 
     29 namespace WebCore {
     30 
     31 inline SVGVKernElement::SVGVKernElement(const QualifiedName& tagName, Document* document)
     32     : SVGElement(tagName, document)
     33 {
     34     ASSERT(hasTagName(SVGNames::vkernTag));
     35     ScriptWrappable::init(this);
     36 }
     37 
     38 PassRefPtr<SVGVKernElement> SVGVKernElement::create(const QualifiedName& tagName, Document* document)
     39 {
     40     return adoptRef(new SVGVKernElement(tagName, document));
     41 }
     42 
     43 Node::InsertionNotificationRequest SVGVKernElement::insertedInto(ContainerNode* rootParent)
     44 {
     45     if (rootParent->inDocument()) {
     46         ContainerNode* fontNode = parentNode();
     47         if (fontNode && fontNode->hasTagName(SVGNames::fontTag))
     48             toSVGFontElement(fontNode)->invalidateGlyphCache();
     49     }
     50 
     51     return SVGElement::insertedInto(rootParent);
     52 }
     53 
     54 void SVGVKernElement::removedFrom(ContainerNode* rootParent)
     55 {
     56     ContainerNode* fontNode = parentNode();
     57     if (fontNode && fontNode->hasTagName(SVGNames::fontTag))
     58         toSVGFontElement(fontNode)->invalidateGlyphCache();
     59 
     60     SVGElement::removedFrom(rootParent);
     61 }
     62 
     63 void SVGVKernElement::buildVerticalKerningPair(KerningPairVector& kerningPairs)
     64 {
     65     String u1 = fastGetAttribute(SVGNames::u1Attr);
     66     String g1 = fastGetAttribute(SVGNames::g1Attr);
     67     String u2 = fastGetAttribute(SVGNames::u2Attr);
     68     String g2 = fastGetAttribute(SVGNames::g2Attr);
     69     if ((u1.isEmpty() && g1.isEmpty()) || (u2.isEmpty() && g2.isEmpty()))
     70         return;
     71 
     72     SVGKerningPair kerningPair;
     73     if (parseGlyphName(g1, kerningPair.glyphName1)
     74         && parseGlyphName(g2, kerningPair.glyphName2)
     75         && parseKerningUnicodeString(u1, kerningPair.unicodeRange1, kerningPair.unicodeName1)
     76         && parseKerningUnicodeString(u2, kerningPair.unicodeRange2, kerningPair.unicodeName2)) {
     77         kerningPair.kerning = fastGetAttribute(SVGNames::kAttr).string().toFloat();
     78         kerningPairs.append(kerningPair);
     79     }
     80 }
     81 
     82 }
     83 
     84 #endif // ENABLE(SVG_FONTS)
     85