1 files changed, 96 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/svg/SVGTextLayoutEngineSpacing.cpp b/Source/WebCore/rendering/svg/SVGTextLayoutEngineSpacing.cpp
new file mode 100644
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--- /dev/null
+++ b/Source/WebCore/rendering/svg/SVGTextLayoutEngineSpacing.cpp
@@ -0,0 +1,96 @@
+/*
+ * 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)
+#include "SVGTextLayoutEngineSpacing.h"
+
+#include "Font.h"
+#include "SVGRenderStyle.h"
+
+#if ENABLE(SVG_FONTS)
+#include "SVGFontElement.h"
+#endif
+
+namespace WebCore {
+
+SVGTextLayoutEngineSpacing::SVGTextLayoutEngineSpacing(const Font& font)
+    : m_font(font)
+    , m_lastCharacter(0)
+{
+}
+
+float SVGTextLayoutEngineSpacing::calculateSVGKerning(bool isVerticalText, const SVGTextMetrics::Glyph& currentGlyph)
+{
+#if ENABLE(SVG_FONTS)
+    if (!m_font.isSVGFont()) {
+        m_lastGlyph.isValid = false;
+        return 0;
+    }
+
+    SVGFontElement* svgFont = m_font.svgFont();
+    ASSERT(svgFont);
+
+    float kerning = 0;
+    if (m_lastGlyph.isValid) {
+        if (isVerticalText)
+            kerning = svgFont->verticalKerningForPairOfStringsAndGlyphs(m_lastGlyph.unicodeString, m_lastGlyph.name, currentGlyph.unicodeString, currentGlyph.name);
+        else
+            kerning = svgFont->horizontalKerningForPairOfStringsAndGlyphs(m_lastGlyph.unicodeString, m_lastGlyph.name, currentGlyph.unicodeString, currentGlyph.name);
+    }
+
+    m_lastGlyph = currentGlyph;
+    m_lastGlyph.isValid = true;
+    kerning *= m_font.size() / m_font.primaryFont()->unitsPerEm();
+    return kerning;
+#else
+    UNUSED_PARAM(isVerticalText);
+    UNUSED_PARAM(currentGlyph);
+    return false;
+#endif
+}
+
+float SVGTextLayoutEngineSpacing::calculateCSSKerningAndSpacing(const SVGRenderStyle* style, SVGElement* lengthContext, const UChar* currentCharacter)
+{
+    float kerning = 0;
+    SVGLength kerningLength = style->kerning();
+    if (kerningLength.unitType() == LengthTypePercentage)
+        kerning = kerningLength.valueAsPercentage() * m_font.pixelSize();
+    else
+        kerning = kerningLength.value(lengthContext);
+
+    const UChar* lastCharacter = m_lastCharacter;
+    m_lastCharacter = currentCharacter;
+
+    if (!kerning && !m_font.letterSpacing() && !m_font.wordSpacing())
+        return 0;
+
+    float spacing = m_font.letterSpacing() + kerning;
+    if (currentCharacter && lastCharacter && m_font.wordSpacing()) {
+        if (Font::treatAsSpace(*currentCharacter) && !Font::treatAsSpace(*lastCharacter))
+            spacing += m_font.wordSpacing();
+    }
+
+    return spacing;
+}
+
+}
+
+#endif // ENABLE(SVG)