Remove SVG fonts

Source/core/svg/SVGFontElement.cpp

Index: Source/core/svg/SVGFontElement.cpp
diff --git a/Source/core/svg/SVGFontElement.cpp b/Source/core/svg/SVGFontElement.cpp
deleted file mode 100644
index c1a712eb9d44de048f498dcb3ab6ff0a278b0d0d..0000000000000000000000000000000000000000
--- a/Source/core/svg/SVGFontElement.cpp
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * 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 "core/svg/SVGFontElement.h"
-
-#include "core/dom/ElementTraversal.h"
-#include "core/frame/UseCounter.h"
-#include "core/svg/SVGGlyphElement.h"
-#include "core/svg/SVGHKernElement.h"
-#include "core/svg/SVGMissingGlyphElement.h"
-#include "core/svg/SVGVKernElement.h"
-#include "wtf/ASCIICType.h"
-
-namespace blink {
-
-inline SVGFontElement::SVGFontElement(Document& document)
-    : SVGElement(SVGNames::fontTag, document)
-    , m_missingGlyph(0)
-    , m_isGlyphCacheValid(false)
-{
-    UseCounter::count(document, UseCounter::SVGFontElement);
-}
-
-DEFINE_NODE_FACTORY(SVGFontElement)
-
-void SVGFontElement::invalidateGlyphCache()
-{
-    if (m_isGlyphCacheValid) {
-        m_glyphMap.clear();
-        m_horizontalKerningTable.clear();
-        m_verticalKerningTable.clear();
-    }
-    m_isGlyphCacheValid = false;
-}
-
-void SVGFontElement::registerLigaturesInGlyphCache(Vector<String>& ligatures)
-{
-    ASSERT(!ligatures.isEmpty());
-
-    // Register each character of a ligature in the map, if not present.
-    // Eg. If only a "fi" ligature is present, but not "f" and "i", the
-    // GlyphPage will not contain any entries for "f" and "i", so the
-    // SVGFont is not used to render the text "fi1234". Register an
-    // empty SVGGlyph with the character, so the SVG Font will be used
-    // to render the text. If someone tries to render "f2" the SVG Font
-    // will not be able to find a glyph for "f", but handles the fallback
-    // character substitution properly through glyphDataForCharacter().
-    Vector<SVGGlyph> glyphs;
-    size_t ligaturesSize = ligatures.size();
-    for (size_t i = 0; i < ligaturesSize; ++i) {
-        const String& unicode = ligatures[i];
-
-        unsigned unicodeLength = unicode.length();
-        ASSERT(unicodeLength > 1);
-
-        for (unsigned i = 0; i < unicodeLength; ++i) {
-            String lookupString = unicode.substring(i, 1);
-            m_glyphMap.collectGlyphsForString(lookupString, glyphs);
-            if (!glyphs.isEmpty()) {
-                glyphs.clear();
-                continue;
-            }
-
-            // This glyph is never meant to be used for rendering, only as identifier as a part of a ligature.
-            SVGGlyph newGlyphPart;
-            newGlyphPart.isPartOfLigature = true;
-            m_glyphMap.addGlyph(String(), lookupString, newGlyphPart);
-        }
-    }
-}
-
-static inline KerningPairKey makeKerningPairKey(Glyph glyphId1, Glyph glyphId2)
-{
-    return glyphId1 << 16 | glyphId2;
-}
-
-Vector<SVGGlyph> SVGFontElement::buildGlyphList(const UnicodeRanges& unicodeRanges, const HashSet<String>& unicodeNames, const HashSet<String>& glyphNames) const
-{
-    Vector<SVGGlyph> glyphs;
-    if (!unicodeRanges.isEmpty()) {
-        const UnicodeRanges::const_iterator end = unicodeRanges.end();
-        for (UnicodeRanges::const_iterator it = unicodeRanges.begin(); it != end; ++it)
-            m_glyphMap.collectGlyphsForUnicodeRange(*it, glyphs);
-    }
-    if (!unicodeNames.isEmpty()) {
-        const HashSet<String>::const_iterator end = unicodeNames.end();
-        for (HashSet<String>::const_iterator it = unicodeNames.begin(); it != end; ++it)
-            m_glyphMap.collectGlyphsForStringExact(*it, glyphs);
-    }
-    if (!glyphNames.isEmpty()) {
-        const HashSet<String>::const_iterator end = glyphNames.end();
-        for (HashSet<String>::const_iterator it = glyphNames.begin(); it != end; ++it) {
-            const SVGGlyph& glyph = m_glyphMap.glyphIdentifierForGlyphName(*it);
-            if (glyph.tableEntry)
-                glyphs.append(glyph);
-        }
-    }
-    return glyphs;
-}
-
-void SVGFontElement::addPairsToKerningTable(const SVGKerningPair& kerningPair, KerningTable& kerningTable)
-{
-    Vector<SVGGlyph> glyphsLhs = buildGlyphList(kerningPair.unicodeRange1, kerningPair.unicodeName1, kerningPair.glyphName1);
-    Vector<SVGGlyph> glyphsRhs = buildGlyphList(kerningPair.unicodeRange2, kerningPair.unicodeName2, kerningPair.glyphName2);
-    if (glyphsLhs.isEmpty() || glyphsRhs.isEmpty())
-        return;
-    size_t glyphsLhsSize = glyphsLhs.size();
-    size_t glyphsRhsSize = glyphsRhs.size();
-    // Enumerate all the valid kerning pairs, and add them to the table.
-    for (size_t lhsIndex = 0; lhsIndex < glyphsLhsSize; ++lhsIndex) {
-        for (size_t rhsIndex = 0; rhsIndex < glyphsRhsSize; ++rhsIndex) {
-            Glyph glyph1 = glyphsLhs[lhsIndex].tableEntry;
-            Glyph glyph2 = glyphsRhs[rhsIndex].tableEntry;
-            ASSERT(glyph1 && glyph2);
-            kerningTable.add(makeKerningPairKey(glyph1, glyph2), kerningPair.kerning);
-        }
-    }
-}
-
-void SVGFontElement::buildKerningTable(const KerningPairVector& kerningPairs, KerningTable& kerningTable)
-{
-    size_t kerningPairsSize = kerningPairs.size();
-    for (size_t i = 0; i < kerningPairsSize; ++i)
-        addPairsToKerningTable(kerningPairs[i], kerningTable);
-}
-
-void SVGFontElement::ensureGlyphCache()
-{
-    if (m_isGlyphCacheValid)
-        return;
-
-    KerningPairVector horizontalKerningPairs;
-    KerningPairVector verticalKerningPairs;
-
-    SVGMissingGlyphElement* firstMissingGlyphElement = 0;
-    Vector<String> ligatures;
-    for (SVGElement* element = Traversal<SVGElement>::firstChild(*this); element; element = Traversal<SVGElement>::nextSibling(*element)) {
-        if (isSVGGlyphElement(*element)) {
-            SVGGlyphElement& glyph = toSVGGlyphElement(*element);
-            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 (isSVGHKernElement(*element)) {
-            toSVGHKernElement(*element).buildHorizontalKerningPair(horizontalKerningPairs);
-        } else if (isSVGVKernElement(*element)) {
-            toSVGVKernElement(*element).buildVerticalKerningPair(verticalKerningPairs);
-        } else if (isSVGMissingGlyphElement(*element) && !firstMissingGlyphElement) {
-            firstMissingGlyphElement = toSVGMissingGlyphElement(element);
-        }
-    }
-
-    // Build the kerning tables.
-    buildKerningTable(horizontalKerningPairs, m_horizontalKerningTable);
-    buildKerningTable(verticalKerningPairs, m_verticalKerningTable);
-
-    // The glyph-name->glyph-id map won't be needed/used after having built the kerning table(s).
-    m_glyphMap.dropNamedGlyphMap();
-
-    // 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;
-}
-
-static float kerningForPairOfGlyphs(const KerningTable& kerningTable, Glyph glyphId1, Glyph glyphId2)
-{
-    KerningTable::const_iterator result = kerningTable.find(makeKerningPairKey(glyphId1, glyphId2));
-    if (result != kerningTable.end())
-        return result->value;
-
-    return 0;
-}
-
-float SVGFontElement::horizontalKerningForPairOfGlyphs(Glyph glyphId1, Glyph glyphId2) const
-{
-    if (m_horizontalKerningTable.isEmpty())
-        return 0;
-
-    return kerningForPairOfGlyphs(m_horizontalKerningTable, glyphId1, glyphId2);
-}
-
-float SVGFontElement::verticalKerningForPairOfGlyphs(Glyph glyphId1, Glyph glyphId2) const
-{
-    if (m_verticalKerningTable.isEmpty())
-        return 0;
-
-    return kerningForPairOfGlyphs(m_verticalKerningTable, glyphId1, glyphId2);
-}
-
-void SVGFontElement::collectGlyphsForString(const String& string, Vector<SVGGlyph>& glyphs)
-{
-    ensureGlyphCache();
-    m_glyphMap.collectGlyphsForString(string, glyphs);
-}
-
-void SVGFontElement::collectGlyphsForAltGlyphReference(const String& glyphIdentifier, Vector<SVGGlyph>& glyphs)
-{
-    ensureGlyphCache();
-    // FIXME: We only support glyphName -> single glyph mapping so far.
-    glyphs.append(m_glyphMap.glyphIdentifierForAltGlyphReference(glyphIdentifier));
-}
-
-SVGGlyph SVGFontElement::svgGlyphForGlyph(Glyph glyph)
-{
-    ensureGlyphCache();
-    return m_glyphMap.svgGlyphForGlyph(glyph);
-}
-
-Glyph SVGFontElement::missingGlyph()
-{
-    ensureGlyphCache();
-    return m_missingGlyph;
-}
-
-} // namespace blink
-
-#endif // ENABLE(SVG_FONTS)