1 files changed, 184 insertions, 0 deletions
diff --git a/Source/WebCore/svg/SVGFontElement.cpp b/Source/WebCore/svg/SVGFontElement.cpp
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+++ b/Source/WebCore/svg/SVGFontElement.cpp
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+/*
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+ * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
+ * Copyright (C) Research In Motion Limited 2010. All rights reserved.
+ *
+ * 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 "SVGFontElement.h"
+
+#include "Document.h"
+#include "Font.h"
+#include "GlyphPageTreeNode.h"
+#include "SVGGlyphElement.h"
+#include "SVGHKernElement.h"
+#include "SVGMissingGlyphElement.h"
+#include "SVGNames.h"
+#include "SVGVKernElement.h"
+#include <wtf/ASCIICType.h>
+
+namespace WebCore {
+
+// Animated property declarations
+DEFINE_ANIMATED_BOOLEAN(SVGFontElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
+
+inline SVGFontElement::SVGFontElement(const QualifiedName& tagName, Document* document)
+    : SVGStyledElement(tagName, document) 
+    , m_isGlyphCacheValid(false)
+{
+}
+
+PassRefPtr<SVGFontElement> SVGFontElement::create(const QualifiedName& tagName, Document* document)
+{
+    return adoptRef(new SVGFontElement(tagName, document));
+}
+
+void SVGFontElement::synchronizeProperty(const QualifiedName& attrName)
+{
+    SVGStyledElement::synchronizeProperty(attrName);
+
+    if (attrName == anyQName() || SVGExternalResourcesRequired::isKnownAttribute(attrName))
+        synchronizeExternalResourcesRequired();
+}
+
+void SVGFontElement::invalidateGlyphCache()
+{
+    if (m_isGlyphCacheValid) {
+        m_glyphMap.clear();
+        m_horizontalKerningPairs.clear();
+        m_verticalKerningPairs.clear();
+    }
+    m_isGlyphCacheValid = false;
+}
+
+SVGMissingGlyphElement* SVGFontElement::firstMissingGlyphElement() const
+{
+    for (Node* child = firstChild(); child; child = child->nextSibling()) {
+        if (child->hasTagName(SVGNames::missing_glyphTag))
+            return static_cast<SVGMissingGlyphElement*>(child);
+    }
+
+    return 0;
+}
+
+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;
+}
+
+static bool stringMatchesUnicodeRange(const String& unicodeString, const UnicodeRanges& ranges, const HashSet<String>& unicodeValues)
+{
+    if (unicodeString.isEmpty())
+        return false;
+
+    if (!ranges.isEmpty()) {
+        UChar firstChar = unicodeString[0];
+        const UnicodeRanges::const_iterator end = ranges.end();
+        for (UnicodeRanges::const_iterator it = ranges.begin(); it != end; ++it) {
+            if (firstChar >= it->first && firstChar <= it->second)
+                return true;
+        }
+    }
+
+    if (!unicodeValues.isEmpty())
+        return unicodeValues.contains(unicodeString);
+    
+    return false;
+}
+
+static bool stringMatchesGlyphName(const String& glyphName, const HashSet<String>& glyphValues)
+{
+    if (glyphName.isEmpty())
+        return false;
+
+    if (!glyphValues.isEmpty())
+        return glyphValues.contains(glyphName);
+    
+    return false;
+}
+    
+static bool matches(const String& u1, const String& g1, const String& u2, const String& g2, const SVGKerningPair& kerningPair)
+{
+    if (!stringMatchesUnicodeRange(u1, kerningPair.unicodeRange1, kerningPair.unicodeName1)
+        && !stringMatchesGlyphName(g1, kerningPair.glyphName1))
+        return false;
+
+    if (!stringMatchesUnicodeRange(u2, kerningPair.unicodeRange2, kerningPair.unicodeName2)
+        && !stringMatchesGlyphName(g2, kerningPair.glyphName2))
+        return false;
+
+    return true;
+}
+
+static float kerningForPairOfStringsAndGlyphs(KerningPairVector& kerningPairs, const String& u1, const String& g1, const String& u2, const String& g2)
+{
+    KerningPairVector::const_iterator it = kerningPairs.end() - 1;
+    const KerningPairVector::const_iterator begin = kerningPairs.begin() - 1;
+    for (; it != begin; --it) {
+        if (matches(u1, g1, u2, g2, *it))
+            return it->kerning;
+    }
+
+    return 0.0f;
+}
+    
+float SVGFontElement::horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const
+{
+    if (m_horizontalKerningPairs.isEmpty())
+        return 0.0f;
+
+    return kerningForPairOfStringsAndGlyphs(m_horizontalKerningPairs, u1, g1, u2, g2);
+}
+
+float SVGFontElement::verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const
+{
+    if (m_verticalKerningPairs.isEmpty())
+        return 0.0f;
+
+    return kerningForPairOfStringsAndGlyphs(m_verticalKerningPairs, u1, g1, u2, g2);
+}
+
+void SVGFontElement::getGlyphIdentifiersForString(const String& string, Vector<SVGGlyphIdentifier>& glyphs) const
+{
+    ensureGlyphCache();
+    m_glyphMap.get(string, glyphs);
+}
+
+}
+
+#endif // ENABLE(SVG_FONTS)