void SVGFontElement::ensureGlyphCache()
{
if (m_isGlyphCacheValid)
return;
SVGMissingGlyphElement* firstMissingGlyphElement = 0;
Vector<String> ligatures;
for (Node* child = firstChild(); child; child = child->nextSibling()) {
if (child->hasTagName(SVGNames::glyphTag)) {
SVGGlyphElement* glyph = static_cast<SVGGlyphElement*>(child);
AtomicString unicode = glyph->fastGetAttribute(SVGNames::unicodeAttr);
AtomicString glyphId = glyph->getIdAttribute();
if (glyphId.isEmpty() && unicode.isEmpty())
continue;
m_glyphMap.addGlyph(glyphId, unicode, glyph->buildGlyphIdentifier());
// Register ligatures, if needed, don't mix up with surrogate pairs though!
if (unicode.length() > 1 && !U16_IS_SURROGATE(unicode[0]))
ligatures.append(unicode.string());
} else if (child->hasTagName(SVGNames::hkernTag)) {
SVGHKernElement* hkern = static_cast<SVGHKernElement*>(child);
hkern->buildHorizontalKerningPair(m_horizontalKerningPairs);
} else if (child->hasTagName(SVGNames::vkernTag)) {
SVGVKernElement* vkern = static_cast<SVGVKernElement*>(child);
vkern->buildVerticalKerningPair(m_verticalKerningPairs);
} else if (child->hasTagName(SVGNames::missing_glyphTag) && !firstMissingGlyphElement)
firstMissingGlyphElement = static_cast<SVGMissingGlyphElement*>(child);
}
// Register each character of each ligature, if needed.
if (!ligatures.isEmpty())
registerLigaturesInGlyphCache(ligatures);
// Register missing-glyph element, if present.
if (firstMissingGlyphElement) {
SVGGlyph svgGlyph = SVGGlyphElement::buildGenericGlyphIdentifier(firstMissingGlyphElement);
m_glyphMap.appendToGlyphTable(svgGlyph);
m_missingGlyph = svgGlyph.tableEntry;
ASSERT(m_missingGlyph > 0);
}
m_isGlyphCacheValid = true;
}
void SVGFontElement::ensureGlyphCache() const
{
if (m_isGlyphCacheValid)
return;
for (Node* child = firstChild(); child; child = child->nextSibling()) {
if (child->hasTagName(SVGNames::glyphTag)) {
SVGGlyphElement* glyph = static_cast<SVGGlyphElement*>(child);
String unicode = glyph->getAttribute(SVGNames::unicodeAttr);
if (unicode.length())
m_glyphMap.add(unicode, glyph->buildGlyphIdentifier());
} else if (child->hasTagName(SVGNames::hkernTag)) {
SVGHKernElement* hkern = static_cast<SVGHKernElement*>(child);
hkern->buildHorizontalKerningPair(m_horizontalKerningPairs);
} else if (child->hasTagName(SVGNames::vkernTag)) {
SVGVKernElement* vkern = static_cast<SVGVKernElement*>(child);
vkern->buildVerticalKerningPair(m_verticalKerningPairs);
}
}
m_isGlyphCacheValid = true;
}
