external/webkit r30707

1 files changed, 1665 insertions, 0 deletions

diff --git a/WebCore/rendering/SVGRootInlineBox.cpp b/WebCore/rendering/SVGRootInlineBox.cpp
new file mode 100644
index 0000000..d609687
--- /dev/null
+++ b/WebCore/rendering/SVGRootInlineBox.cpp
@@ -0,0 +1,1665 @@
+/*
+ * This file is part of the WebKit project.
+ *
+ * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
+ *           (C) 2006 Apple Computer Inc.
+ *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
+ *
+ * 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 "SVGRootInlineBox.h"
+
+#include "Editor.h"
+#include "Frame.h"
+#include "GraphicsContext.h"
+#include "RenderSVGRoot.h"
+#include "SVGInlineFlowBox.h"
+#include "SVGInlineTextBox.h"
+#include "SVGPaintServer.h"
+#include "SVGRenderStyleDefs.h"
+#include "SVGRenderSupport.h"
+#include "SVGResourceFilter.h"
+#include "SVGTextPositioningElement.h"
+#include "SVGURIReference.h"
+#include "Text.h"
+#include "UnicodeRange.h"
+
+#include <float.h>
+
+// Text chunk creation is complex and the whole process
+// can easily be traced by setting this variable > 0.
+#define DEBUG_CHUNK_BUILDING 0
+
+namespace WebCore {
+
+static inline bool isVerticalWritingMode(const SVGRenderStyle* style)
+{
+    return style->writingMode() == WM_TBRL || style->writingMode() == WM_TB; 
+}
+
+static inline EAlignmentBaseline dominantBaselineToShift(bool isVerticalText, const RenderObject* text, const Font& font)
+{
+    ASSERT(text);
+
+    const SVGRenderStyle* style = text->style() ? text->style()->svgStyle() : 0;
+    ASSERT(style);
+
+    const SVGRenderStyle* parentStyle = text->parent() && text->parent()->style() ? text->parent()->style()->svgStyle() : 0;
+
+    EDominantBaseline baseline = style->dominantBaseline();
+    if (baseline == DB_AUTO) {
+        if (isVerticalText)
+            baseline = DB_CENTRAL;
+        else
+            baseline = DB_ALPHABETIC;
+    }
+
+    switch (baseline) {
+    case DB_USE_SCRIPT:
+        // TODO: The dominant-baseline and the baseline-table components are set by
+        //       determining the predominant script of the character data content.
+        return AB_ALPHABETIC;
+    case DB_NO_CHANGE:
+    {
+        if (parentStyle)
+            return dominantBaselineToShift(isVerticalText, text->parent(), font);
+
+        ASSERT_NOT_REACHED();
+        return AB_AUTO;
+    }
+    case DB_RESET_SIZE:
+    {
+        if (parentStyle)
+            return dominantBaselineToShift(isVerticalText, text->parent(), font);
+
+        ASSERT_NOT_REACHED();
+        return AB_AUTO;    
+    }
+    case DB_IDEOGRAPHIC:
+        return AB_IDEOGRAPHIC;
+    case DB_ALPHABETIC:
+        return AB_ALPHABETIC;
+    case DB_HANGING:
+        return AB_HANGING;
+    case DB_MATHEMATICAL:
+        return AB_MATHEMATICAL;
+    case DB_CENTRAL:
+        return AB_CENTRAL;
+    case DB_MIDDLE:
+        return AB_MIDDLE;
+    case DB_TEXT_AFTER_EDGE:
+        return AB_TEXT_AFTER_EDGE;
+    case DB_TEXT_BEFORE_EDGE:
+        return AB_TEXT_BEFORE_EDGE;
+    default:
+        ASSERT_NOT_REACHED();
+        return AB_AUTO;
+    }
+}
+
+static inline float alignmentBaselineToShift(bool isVerticalText, const RenderObject* text, const Font& font)
+{
+    ASSERT(text);
+
+    const SVGRenderStyle* style = text->style() ? text->style()->svgStyle() : 0;
+    ASSERT(style);
+
+    const SVGRenderStyle* parentStyle = text->parent() && text->parent()->style() ? text->parent()->style()->svgStyle() : 0;
+
+    EAlignmentBaseline baseline = style->alignmentBaseline();
+    if (baseline == AB_AUTO) {
+        if (parentStyle && style->dominantBaseline() == DB_AUTO)
+            baseline = dominantBaselineToShift(isVerticalText, text->parent(), font);
+        else
+            baseline = dominantBaselineToShift(isVerticalText, text, font);
+
+        ASSERT(baseline != AB_AUTO);    
+    }
+
+    // Note: http://wiki.apache.org/xmlgraphics-fop/LineLayout/AlignmentHandling
+    switch (baseline) {
+    case AB_BASELINE:
+    {
+        if (parentStyle)
+            return dominantBaselineToShift(isVerticalText, text->parent(), font);
+
+        return 0.0f;
+    }
+    case AB_BEFORE_EDGE:
+    case AB_TEXT_BEFORE_EDGE:
+        return font.ascent();
+    case AB_MIDDLE:
+        return font.xHeight() / 2.0f;
+    case AB_CENTRAL:
+        // Not needed, we're taking this into account already for vertical text!
+        // return (font.ascent() - font.descent()) / 2.0f;
+        return 0.0f;
+    case AB_AFTER_EDGE:
+    case AB_TEXT_AFTER_EDGE:
+    case AB_IDEOGRAPHIC:
+        return font.descent();
+    case AB_ALPHABETIC:
+        return 0.0f;
+    case AB_HANGING:
+        return font.ascent() * 8.0f / 10.0f;
+    case AB_MATHEMATICAL:
+        return font.ascent() / 2.0f;
+    default:
+        ASSERT_NOT_REACHED();
+        return 0.0f;
+    }
+}
+
+static inline float glyphOrientationToAngle(const SVGRenderStyle* svgStyle, bool isVerticalText, const UChar& character)
+{
+    switch (isVerticalText ? svgStyle->glyphOrientationVertical() : svgStyle->glyphOrientationHorizontal()) {
+    case GO_AUTO:
+    {
+        // Spec: Fullwidth ideographic and fullwidth Latin text will be set with a glyph-orientation of 0-degrees.
+        //       Text which is not fullwidth will be set with a glyph-orientation of 90-degrees.
+        unsigned int unicodeRange = findCharUnicodeRange(character);
+        if (unicodeRange == cRangeSetLatin || unicodeRange == cRangeArabic)
+            return 90.0f;
+
+        return 0.0f;
+    }
+    case GO_90DEG:
+        return 90.0f;
+    case GO_180DEG:
+        return 180.0f;
+    case GO_270DEG:
+        return 270.0f;
+    case GO_0DEG:
+    default:
+        return 0.0f;
+    }
+}
+
+static inline bool glyphOrientationIsMultiplyOf180Degrees(float orientationAngle)
+{
+    return fabsf(fmodf(orientationAngle, 180.0f)) == 0.0f;
+}
+
+static inline float calculateGlyphAdvanceAndShiftRespectingOrientation(bool isVerticalText, float orientationAngle, float glyphWidth, float glyphHeight, const Font& font, SVGChar& svgChar, float& xOrientationShift, float& yOrientationShift)
+{
+    bool orientationIsMultiplyOf180Degrees = glyphOrientationIsMultiplyOf180Degrees(orientationAngle);
+
+    // The function is based on spec requirements:
+    //
+    // Spec: If the 'glyph-orientation-horizontal' results in an orientation angle that is not a multiple of
+    // of 180 degrees, then the current text position is incremented according to the vertical metrics of the glyph.
+    //
+    // Spec: If if the 'glyph-orientation-vertical' results in an orientation angle that is not a multiple of
+    // 180 degrees,then the current text position is incremented according to the horizontal metrics of the glyph.
+
+    // vertical orientation handling
+    if (isVerticalText) {
+        if (orientationAngle == 0.0f) {
+            xOrientationShift = -glyphWidth / 2.0f;
+            yOrientationShift = font.ascent();
+        } else if (orientationAngle == 90.0f) {
+            xOrientationShift = -glyphHeight;
+            yOrientationShift = font.descent();
+            svgChar.orientationShiftY = -font.ascent();
+        } else if (orientationAngle == 270.0f) {
+            xOrientationShift = glyphHeight;
+            yOrientationShift = font.descent();
+            svgChar.orientationShiftX = -glyphWidth;
+            svgChar.orientationShiftY = -font.ascent();
+        } else if (orientationAngle == 180.0f) {
+            yOrientationShift = font.ascent();
+            svgChar.orientationShiftX = -glyphWidth / 2.0f;
+            svgChar.orientationShiftY = font.ascent() - font.descent();
+        }
+
+        // vertical advance calculation
+        if (orientationAngle != 0.0f && !orientationIsMultiplyOf180Degrees)
+            return glyphWidth;
+
+        return glyphHeight; 
+    }
+
+    // horizontal orientation handling
+    if (orientationAngle == 90.0f) {
+        xOrientationShift = glyphWidth / 2.0f;
+        yOrientationShift = -font.descent();
+        svgChar.orientationShiftX = -glyphWidth / 2.0f - font.descent(); 
+        svgChar.orientationShiftY = font.descent();
+    } else if (orientationAngle == 270.0f) {
+        xOrientationShift = -glyphWidth / 2.0f;
+        yOrientationShift = -font.descent();
+        svgChar.orientationShiftX = -glyphWidth / 2.0f + font.descent();
+        svgChar.orientationShiftY = glyphHeight;
+    } else if (orientationAngle == 180.0f) {
+        xOrientationShift = glyphWidth / 2.0f;
+        svgChar.orientationShiftX = -glyphWidth / 2.0f;
+        svgChar.orientationShiftY = font.ascent() - font.descent();
+    }
+
+    // horizontal advance calculation
+    if (orientationAngle != 0.0f && !orientationIsMultiplyOf180Degrees)
+        return glyphHeight;
+
+    return glyphWidth;
+}
+
+static inline void startTextChunk(SVGTextChunkLayoutInfo& info)
+{
+    info.chunk.boxes.clear();
+    info.chunk.boxes.append(SVGInlineBoxCharacterRange());
+
+    info.chunk.start = info.it;
+    info.assignChunkProperties = true;
+}
+
+static inline void closeTextChunk(SVGTextChunkLayoutInfo& info)
+{
+    ASSERT(!info.chunk.boxes.last().isOpen());
+    ASSERT(info.chunk.boxes.last().isClosed());
+
+    info.chunk.end = info.it;
+    ASSERT(info.chunk.end >= info.chunk.start);
+
+    info.svgTextChunks.append(info.chunk);
+}
+
+RenderSVGRoot* findSVGRootObject(RenderObject* start)
+{
+    // Find associated root inline box
+    while (start && !start->isSVGRoot())
+        start = start->parent();
+
+    ASSERT(start);
+    ASSERT(start->isSVGRoot());
+
+    return static_cast<RenderSVGRoot*>(start);
+}
+
+static inline FloatPoint topLeftPositionOfCharacterRange(Vector<SVGChar>& chars)
+{
+    return topLeftPositionOfCharacterRange(chars.begin(), chars.end());
+}
+
+FloatPoint topLeftPositionOfCharacterRange(Vector<SVGChar>::iterator it, Vector<SVGChar>::iterator end)
+{
+    float lowX = FLT_MAX, lowY = FLT_MAX;
+    for (; it != end; ++it) {
+        if (it->isHidden())
+            continue;
+
+        float x = (*it).x;
+        float y = (*it).y;
+
+        if (x < lowX)
+            lowX = x;
+
+        if (y < lowY)
+            lowY = y;
+    }
+
+    return FloatPoint(lowX, lowY);
+}
+
+// Helper function
+static float calculateKerning(RenderObject* item)
+{
+    const Font& font = item->style()->font();
+    const SVGRenderStyle* svgStyle = item->style()->svgStyle();
+
+    float kerning = 0.0f;
+    if (CSSPrimitiveValue* primitive = static_cast<CSSPrimitiveValue*>(svgStyle->kerning())) {
+        kerning = primitive->getFloatValue();
+
+        if (primitive->primitiveType() == CSSPrimitiveValue::CSS_PERCENTAGE && font.pixelSize() > 0)
+            kerning = kerning / 100.0f * font.pixelSize();
+    }
+
+    return kerning;
+}
+
+// Helper class for paint()
+struct SVGRootInlineBoxPaintWalker {
+    SVGRootInlineBoxPaintWalker(SVGRootInlineBox* rootBox, SVGResourceFilter* rootFilter, RenderObject::PaintInfo paintInfo, int tx, int ty)
+        : m_rootBox(rootBox)
+        , m_chunkStarted(false)
+        , m_paintInfo(paintInfo)
+        , m_savedInfo(paintInfo)
+        , m_boundingBox(tx + rootBox->xPos(), ty + rootBox->yPos(), rootBox->width(), rootBox->height())
+        , m_filter(0)
+        , m_rootFilter(rootFilter)
+        , m_fillPaintServer(0)
+        , m_strokePaintServer(0)
+        , m_fillPaintServerObject(0)
+        , m_strokePaintServerObject(0)
+        , m_tx(tx)
+        , m_ty(ty)
+    {
+    }
+
+    ~SVGRootInlineBoxPaintWalker()
+    {
+        ASSERT(!m_filter);
+        ASSERT(!m_fillPaintServer);
+        ASSERT(!m_fillPaintServerObject);
+        ASSERT(!m_strokePaintServer);
+        ASSERT(!m_strokePaintServerObject);
+        ASSERT(!m_chunkStarted);
+    }
+
+    void teardownFillPaintServer()
+    {
+        if (!m_fillPaintServer)
+            return;
+
+        m_fillPaintServer->teardown(m_paintInfo.context, m_fillPaintServerObject, ApplyToFillTargetType, true);
+
+        m_fillPaintServer = 0;
+        m_fillPaintServerObject = 0;
+    }
+
+    void teardownStrokePaintServer()
+    {
+        if (!m_strokePaintServer)
+            return;
+
+        m_strokePaintServer->teardown(m_paintInfo.context, m_strokePaintServerObject, ApplyToStrokeTargetType, true);
+
+        m_strokePaintServer = 0;
+        m_strokePaintServerObject = 0;
+    }
+
+    void chunkStartCallback(InlineBox* box)
+    {
+        ASSERT(!m_chunkStarted);
+        m_chunkStarted = true;
+
+        InlineFlowBox* flowBox = box->parent();
+
+        // Initialize text rendering
+        RenderObject* object = flowBox->object();
+        ASSERT(object);
+
+        m_savedInfo = m_paintInfo;
+        m_paintInfo.context->save();
+
+        if (!flowBox->isRootInlineBox())
+            m_paintInfo.context->concatCTM(m_rootBox->object()->localTransform());
+
+        m_paintInfo.context->concatCTM(object->localTransform());
+
+        if (!flowBox->isRootInlineBox()) {
+            prepareToRenderSVGContent(object, m_paintInfo, m_boundingBox, m_filter, m_rootFilter);
+            m_paintInfo.rect = object->localTransform().inverse().mapRect(m_paintInfo.rect);
+        }
+    }
+
+    void chunkEndCallback(InlineBox* box)
+    {
+        ASSERT(m_chunkStarted);
+        m_chunkStarted = false;
+
+        InlineFlowBox* flowBox = box->parent();
+
+        RenderObject* object = flowBox->object();
+        ASSERT(object);
+
+        // Clean up last used paint server
+        teardownFillPaintServer();
+        teardownStrokePaintServer();
+
+        // Finalize text rendering 
+        if (!flowBox->isRootInlineBox()) {
+            finishRenderSVGContent(object, m_paintInfo, m_boundingBox, m_filter, m_savedInfo.context);
+            m_filter = 0;
+        }
+
+        // Restore context & repaint rect
+        m_paintInfo.context->restore();
+        m_paintInfo.rect = m_savedInfo.rect;
+    }
+
+    bool chunkSetupFillCallback(InlineBox* box)
+    {
+        InlineFlowBox* flowBox = box->parent();
+
+        // Setup fill paint server
+        RenderObject* object = flowBox->object();
+        ASSERT(object);
+
+        ASSERT(!m_strokePaintServer);
+        teardownFillPaintServer();
+
+        m_fillPaintServer = SVGPaintServer::fillPaintServer(object->style(), object);
+        if (m_fillPaintServer) {
+            m_fillPaintServer->setup(m_paintInfo.context, object, ApplyToFillTargetType, true);
+            m_fillPaintServerObject = object;
+            return true;
+        }
+
+        return false;
+    }
+
+    bool chunkSetupStrokeCallback(InlineBox* box)
+    {
+        InlineFlowBox* flowBox = box->parent();
+
+        // Setup stroke paint server
+        RenderObject* object = flowBox->object();
+        ASSERT(object);
+
+        // If we're both stroked & filled, teardown fill paint server before stroking.
+        teardownFillPaintServer();
+        teardownStrokePaintServer();
+
+        m_strokePaintServer = SVGPaintServer::strokePaintServer(object->style(), object);
+
+        if (m_strokePaintServer) {
+            m_strokePaintServer->setup(m_paintInfo.context, object, ApplyToStrokeTargetType, true);
+            m_strokePaintServerObject = object;
+            return true;
+        }
+
+        return false;
+    }
+
+    void chunkPortionCallback(SVGInlineTextBox* textBox, int startOffset, const AffineTransform& chunkCtm,
+                              const Vector<SVGChar>::iterator& start, const Vector<SVGChar>::iterator& end)
+    {
+        RenderText* text = textBox->textObject();
+        ASSERT(text);
+
+        RenderStyle* styleToUse = text->style(textBox->isFirstLineStyle());
+        ASSERT(styleToUse);
+
+        startOffset += textBox->start();
+
+        int textDecorations = styleToUse->textDecorationsInEffect(); 
+
+        int textWidth = 0;
+        IntPoint decorationOrigin;
+        SVGTextDecorationInfo info;
+
+        if (!chunkCtm.isIdentity())
+            m_paintInfo.context->concatCTM(chunkCtm);
+
+        for (Vector<SVGChar>::iterator it = start; it != end; ++it) {
+            if (it->isHidden())
+                continue;
+
+            // Determine how many characters - starting from the current - can be drawn at once.
+            Vector<SVGChar>::iterator itSearch = it + 1;
+            while (itSearch != end) {
+                if (itSearch->drawnSeperated || itSearch->isHidden())
+                    break;
+
+                itSearch++;
+            }
+
+            const UChar* stringStart = text->characters() + startOffset + (it - start);
+            unsigned int stringLength = itSearch - it;
+
+            // Paint decorations, that have to be drawn before the text gets drawn
+            if (textDecorations != TDNONE && m_paintInfo.phase != PaintPhaseSelection) {
+                textWidth = styleToUse->font().width(svgTextRunForInlineTextBox(stringStart, stringLength, styleToUse, textBox, (*it).x));
+                decorationOrigin = IntPoint((int) (*it).x, (int) (*it).y - styleToUse->font().ascent());
+                info = m_rootBox->retrievePaintServersForTextDecoration(text);
+            }
+
+            if (textDecorations & UNDERLINE && textWidth != 0.0f)
+                textBox->paintDecoration(UNDERLINE, m_paintInfo.context, decorationOrigin.x(), decorationOrigin.y(), textWidth, *it, info);
+
+            if (textDecorations & OVERLINE && textWidth != 0.0f)
+                textBox->paintDecoration(OVERLINE, m_paintInfo.context, decorationOrigin.x(), decorationOrigin.y(), textWidth, *it, info);
+
+            // Paint text
+            SVGPaintServer* activePaintServer = m_fillPaintServer;
+            if (!activePaintServer)
+                activePaintServer = m_strokePaintServer;
+
+            ASSERT(activePaintServer);
+            textBox->paintCharacters(m_paintInfo, m_tx, m_ty, *it, stringStart, stringLength, activePaintServer);
+
+            // Paint decorations, that have to be drawn afterwards
+            if (textDecorations & LINE_THROUGH && textWidth != 0.0f)
+                textBox->paintDecoration(LINE_THROUGH, m_paintInfo.context, decorationOrigin.x(), decorationOrigin.y(), textWidth, *it, info);
+
+            // Skip processed characters
+            it = itSearch - 1;
+        }
+
+        if (!chunkCtm.isIdentity())
+            m_paintInfo.context->concatCTM(chunkCtm.inverse());
+    }
+
+private:
+    SVGRootInlineBox* m_rootBox;
+    bool m_chunkStarted : 1;
+
+    RenderObject::PaintInfo m_paintInfo;
+    RenderObject::PaintInfo m_savedInfo;
+
+    FloatRect m_boundingBox;
+    SVGResourceFilter* m_filter;
+    SVGResourceFilter* m_rootFilter;
+
+    SVGPaintServer* m_fillPaintServer;
+    SVGPaintServer* m_strokePaintServer;
+
+    RenderObject* m_fillPaintServerObject;
+    RenderObject* m_strokePaintServerObject;
+
+    int m_tx;
+    int m_ty;
+};
+
+void SVGRootInlineBox::paint(RenderObject::PaintInfo& paintInfo, int tx, int ty)
+{
+    if (paintInfo.context->paintingDisabled() || paintInfo.phase != PaintPhaseForeground)
+        return;
+
+    RenderObject::PaintInfo savedInfo(paintInfo);
+    paintInfo.context->save();
+
+    SVGResourceFilter* filter = 0;
+    FloatRect boundingBox(tx + xPos(), ty + yPos(), width(), height());
+
+    // Initialize text rendering
+    paintInfo.context->concatCTM(object()->localTransform());
+    prepareToRenderSVGContent(object(), paintInfo, boundingBox, filter);
+    paintInfo.context->concatCTM(object()->localTransform().inverse());
+ 
+    // Render text, chunk-by-chunk
+    SVGRootInlineBoxPaintWalker walkerCallback(this, filter, paintInfo, tx, ty);
+    SVGTextChunkWalker<SVGRootInlineBoxPaintWalker> walker(&walkerCallback,
+                                                           &SVGRootInlineBoxPaintWalker::chunkPortionCallback,
+                                                           &SVGRootInlineBoxPaintWalker::chunkStartCallback,
+                                                           &SVGRootInlineBoxPaintWalker::chunkEndCallback,
+                                                           &SVGRootInlineBoxPaintWalker::chunkSetupFillCallback,
+                                                           &SVGRootInlineBoxPaintWalker::chunkSetupStrokeCallback);
+
+    walkTextChunks(&walker);
+
+    // Finalize text rendering 
+    finishRenderSVGContent(object(), paintInfo, boundingBox, filter, savedInfo.context);
+    paintInfo.context->restore();
+}
+
+int SVGRootInlineBox::placeBoxesHorizontally(int, int& leftPosition, int& rightPosition, bool&)
+{
+    // Remove any offsets caused by RTL text layout
+    leftPosition = 0;
+    rightPosition = 0;
+    return 0;
+}
+
+void SVGRootInlineBox::verticallyAlignBoxes(int& heightOfBlock)
+{
+    // height is set by layoutInlineBoxes.
+    heightOfBlock = height();
+}
+
+float cummulatedWidthOfInlineBoxCharacterRange(SVGInlineBoxCharacterRange& range)
+{
+    ASSERT(!range.isOpen());
+    ASSERT(range.isClosed());
+    ASSERT(range.box->isInlineTextBox());
+
+    InlineTextBox* textBox = static_cast<InlineTextBox*>(range.box);
+    RenderText* text = textBox->textObject();
+    RenderStyle* style = text->style();
+
+    return style->font().floatWidth(svgTextRunForInlineTextBox(text->characters() + textBox->start() + range.startOffset, range.endOffset - range.startOffset, style, textBox, 0));
+}
+
+float cummulatedHeightOfInlineBoxCharacterRange(SVGInlineBoxCharacterRange& range)
+{
+    ASSERT(!range.isOpen());
+    ASSERT(range.isClosed());
+    ASSERT(range.box->isInlineTextBox());
+
+    InlineTextBox* textBox = static_cast<InlineTextBox*>(range.box);
+    RenderText* text = textBox->textObject();
+    const Font& font = text->style()->font();
+
+    return (range.endOffset - range.startOffset) * (font.ascent() + font.descent());
+}
+
+TextRun svgTextRunForInlineTextBox(const UChar* c, int len, RenderStyle* style, const InlineTextBox* textBox, float xPos)
+{
+    ASSERT(textBox);
+    ASSERT(style);
+
+    TextRun run(c, len, false, static_cast<int>(xPos), textBox->toAdd(), textBox->m_reversed, textBox->m_dirOverride || style->visuallyOrdered());
+
+#if ENABLE(SVG_FONTS)
+    run.setReferencingRenderObject(textBox->textObject()->parent());
+#endif
+
+    // We handle letter & word spacing ourselves
+    run.disableSpacing();
+    return run;
+}
+
+static float cummulatedWidthOrHeightOfTextChunk(SVGTextChunk& chunk, bool calcWidthOnly)
+{
+    float length = 0.0f;
+    Vector<SVGChar>::iterator charIt = chunk.start;
+
+    Vector<SVGInlineBoxCharacterRange>::iterator it = chunk.boxes.begin();
+    Vector<SVGInlineBoxCharacterRange>::iterator end = chunk.boxes.end();
+
+    for (; it != end; ++it) {
+        SVGInlineBoxCharacterRange& range = *it;
+
+        SVGInlineTextBox* box = static_cast<SVGInlineTextBox*>(range.box);
+        RenderStyle* style = box->object()->style();
+
+        for (int i = range.startOffset; i < range.endOffset; ++i) {
+            ASSERT(charIt <= chunk.end);
+
+            // Determine how many characters - starting from the current - can be measured at once.
+            // Important for non-absolute positioned non-latin1 text (ie. Arabic) where ie. the width
+            // of a string is not the sum of the boundaries of all contained glyphs.
+            Vector<SVGChar>::iterator itSearch = charIt + 1;
+            Vector<SVGChar>::iterator endSearch = charIt + range.endOffset - i;
+            while (itSearch != endSearch) {
+                // No need to check for 'isHidden()' here as this function is not called for text paths.
+                if (itSearch->drawnSeperated)
+                    break;
+
+                itSearch++;
+            }
+
+            unsigned int positionOffset = itSearch - charIt;
+
+            // Calculate width/height of subrange
+            SVGInlineBoxCharacterRange subRange;
+            subRange.box = range.box;
+            subRange.startOffset = i;
+            subRange.endOffset = i + positionOffset;
+
+            if (calcWidthOnly)
+                length += cummulatedWidthOfInlineBoxCharacterRange(subRange);
+            else
+                length += cummulatedHeightOfInlineBoxCharacterRange(subRange);
+
+            // Calculate gap between the previous & current range
+            // <text x="10 50 70">ABCD</text> - we need to take the gaps between A & B into account
+            // so add "40" as width, and analogous for B & C, add "20" as width.
+            if (itSearch > chunk.start && itSearch < chunk.end) {
+                SVGChar& lastCharacter = *(itSearch - 1);
+                SVGChar& currentCharacter = *itSearch;
+
+                int offset = box->m_reversed ? box->end() - i - positionOffset + 1 : box->start() + i + positionOffset - 1;
+
+                if (calcWidthOnly) {
+                    float lastGlyphWidth = box->calculateGlyphWidth(style, offset);
+                    length += currentCharacter.x - lastCharacter.x - lastGlyphWidth;
+                } else {
+                    float lastGlyphHeight = box->calculateGlyphHeight(style, offset);
+                    length += currentCharacter.y - lastCharacter.y - lastGlyphHeight;
+                }
+            }
+
+            // Advance processed characters
+            i += positionOffset - 1;
+            charIt = itSearch;
+        }
+    }
+
+    ASSERT(charIt == chunk.end);
+    return length;
+}
+
+static float cummulatedWidthOfTextChunk(SVGTextChunk& chunk)
+{
+    return cummulatedWidthOrHeightOfTextChunk(chunk, true);
+}
+
+static float cummulatedHeightOfTextChunk(SVGTextChunk& chunk)
+{
+    return cummulatedWidthOrHeightOfTextChunk(chunk, false);
+}
+
+static float calculateTextAnchorShiftForTextChunk(SVGTextChunk& chunk, ETextAnchor anchor)
+{
+    float shift = 0.0f;
+
+    if (chunk.isVerticalText)
+        shift = cummulatedHeightOfTextChunk(chunk);
+    else
+        shift = cummulatedWidthOfTextChunk(chunk);
+
+    if (anchor == TA_MIDDLE)
+        shift *= -0.5f;
+    else
+        shift *= -1.0f;
+
+    return shift;
+}
+
+static void applyTextAnchorToTextChunk(SVGTextChunk& chunk)
+{
+    // This method is not called for chunks containing chars aligned on a path.
+    // -> all characters are visible, no need to check for "isHidden()" anywhere.
+
+    if (chunk.anchor == TA_START)
+        return;
+
+    float shift = calculateTextAnchorShiftForTextChunk(chunk, chunk.anchor);
+
+    // Apply correction to chunk
+    Vector<SVGChar>::iterator chunkIt = chunk.start;
+    for (; chunkIt != chunk.end; ++chunkIt) {
+        SVGChar& curChar = *chunkIt;
+
+        if (chunk.isVerticalText)
+            curChar.y += shift;
+        else
+            curChar.x += shift;
+    }
+
+    // Move inline boxes
+    Vector<SVGInlineBoxCharacterRange>::iterator boxIt = chunk.boxes.begin();
+    Vector<SVGInlineBoxCharacterRange>::iterator boxEnd = chunk.boxes.end();
+
+    for (; boxIt != boxEnd; ++boxIt) {
+        SVGInlineBoxCharacterRange& range = *boxIt;
+
+        InlineBox* curBox = range.box;
+        ASSERT(curBox->isInlineTextBox());
+        ASSERT(curBox->parent() && (curBox->parent()->isRootInlineBox() || curBox->parent()->isInlineFlowBox()));
+
+        // Move target box
+        if (chunk.isVerticalText)
+            curBox->setYPos(curBox->yPos() + static_cast<int>(shift));
+        else
+            curBox->setXPos(curBox->xPos() + static_cast<int>(shift));
+    }
+}
+
+static float calculateTextLengthCorrectionForTextChunk(SVGTextChunk& chunk, ELengthAdjust lengthAdjust, float& computedLength)
+{
+    if (chunk.textLength <= 0.0f)
+        return 0.0f;
+
+    float computedWidth = cummulatedWidthOfTextChunk(chunk);
+    float computedHeight = cummulatedHeightOfTextChunk(chunk);
+
+    if ((computedWidth <= 0.0f && !chunk.isVerticalText) ||
+        (computedHeight <= 0.0f && chunk.isVerticalText))
+        return 0.0f;
+
+    if (chunk.isVerticalText)
+        computedLength = computedHeight;
+    else
+        computedLength = computedWidth;
+
+    if (lengthAdjust == SVGTextContentElement::LENGTHADJUST_SPACINGANDGLYPHS) {
+        if (chunk.isVerticalText)
+            chunk.ctm.scale(1.0f, chunk.textLength / computedLength);
+        else
+            chunk.ctm.scale(chunk.textLength / computedLength, 1.0f);
+
+        return 0.0f;
+    }
+
+    return (chunk.textLength - computedLength) / float(chunk.end - chunk.start);
+}
+
+static void applyTextLengthCorrectionToTextChunk(SVGTextChunk& chunk)
+{
+    // This method is not called for chunks containing chars aligned on a path.
+    // -> all characters are visible, no need to check for "isHidden()" anywhere.
+
+    // lengthAdjust="spacingAndGlyphs" is handled by modifying chunk.ctm
+    float computedLength = 0.0f;
+    float spacingToApply = calculateTextLengthCorrectionForTextChunk(chunk, chunk.lengthAdjust, computedLength);
+
+    if (!chunk.ctm.isIdentity() && chunk.lengthAdjust == SVGTextContentElement::LENGTHADJUST_SPACINGANDGLYPHS) {
+        SVGChar& firstChar = *(chunk.start);
+
+        // Assure we apply the chunk scaling in the right origin
+        AffineTransform newChunkCtm;
+        newChunkCtm.translate(firstChar.x, firstChar.y);
+        newChunkCtm = chunk.ctm * newChunkCtm;
+        newChunkCtm.translate(-firstChar.x, -firstChar.y);
+
+        chunk.ctm = newChunkCtm;
+    }
+
+    // Apply correction to chunk 
+    if (spacingToApply != 0.0f) {
+        Vector<SVGChar>::iterator chunkIt = chunk.start;
+        for (; chunkIt != chunk.end; ++chunkIt) {
+            SVGChar& curChar = *chunkIt;
+            curChar.drawnSeperated = true;
+
+            if (chunk.isVerticalText)
+                curChar.y += (chunkIt - chunk.start) * spacingToApply;
+            else
+                curChar.x += (chunkIt - chunk.start) * spacingToApply;
+        }
+    }
+}
+
+void SVGRootInlineBox::computePerCharacterLayoutInformation()
+{
+    // Clean up any previous layout information
+    m_svgChars.clear();
+    m_svgTextChunks.clear();
+
+    // Build layout information for all contained render objects
+    SVGCharacterLayoutInfo info(m_svgChars);
+    buildLayoutInformation(this, info);
+
+    // Now all layout information are available for every character
+    // contained in any of our child inline/flow boxes. Build list
+    // of text chunks now, to be able to apply text-anchor shifts.
+    buildTextChunks(m_svgChars, m_svgTextChunks, this);
+
+    // Layout all text chunks
+    // text-anchor needs to be applied to individual chunks.
+    layoutTextChunks();
+
+    // Finally the top left position of our box is known.
+    // Propogate this knownledge to our RenderSVGText parent.
+    FloatPoint topLeft = topLeftPositionOfCharacterRange(m_svgChars);
+    object()->setPos((int) floorf(topLeft.x()), (int) floorf(topLeft.y()));
+
+    // Layout all InlineText/Flow boxes
+    // BEWARE: This requires the root top/left position to be set correctly before!
+    layoutInlineBoxes();
+}
+
+void SVGRootInlineBox::buildLayoutInformation(InlineFlowBox* start, SVGCharacterLayoutInfo& info)
+{
+    if (start->isRootInlineBox()) {
+        ASSERT(start->object()->element()->hasTagName(SVGNames::textTag));
+
+        SVGTextPositioningElement* positioningElement = static_cast<SVGTextPositioningElement*>(start->object()->element());
+        ASSERT(positioningElement);
+        ASSERT(positioningElement->parentNode());
+
+        info.addLayoutInformation(positioningElement);
+    }
+
+    for (InlineBox* curr = start->firstChild(); curr; curr = curr->nextOnLine()) {
+        if (curr->object()->isText())
+            buildLayoutInformationForTextBox(info, static_cast<InlineTextBox*>(curr));
+        else {
+            ASSERT(curr->isInlineFlowBox());
+            InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(curr);
+
+            bool isAnchor = flowBox->object()->element()->hasTagName(SVGNames::aTag);
+            bool isTextPath = flowBox->object()->element()->hasTagName(SVGNames::textPathTag);
+
+            if (!isTextPath && !isAnchor) {
+                SVGTextPositioningElement* positioningElement = static_cast<SVGTextPositioningElement*>(flowBox->object()->element());
+                ASSERT(positioningElement);
+                ASSERT(positioningElement->parentNode());
+
+                info.addLayoutInformation(positioningElement);
+            } else if (!isAnchor) {
+                info.setInPathLayout(true);
+
+                // Handle text-anchor/textLength on path, which is special.
+                SVGTextContentElement* textContent = 0;
+                Node* node = flowBox->object()->element();
+                if (node && node->isSVGElement())
+                    textContent = static_cast<SVGTextContentElement*>(node);
+                ASSERT(textContent);
+
+                ELengthAdjust lengthAdjust = (ELengthAdjust) textContent->lengthAdjust();
+                ETextAnchor anchor = flowBox->object()->style()->svgStyle()->textAnchor();
+                float textAnchorStartOffset = 0.0f;
+
+                // Initialize sub-layout. We need to create text chunks from the textPath
+                // children using our standard layout code, to be able to measure the
+                // text length using our normal methods and not textPath specific hacks.
+                Vector<SVGChar> tempChars;
+                Vector<SVGTextChunk> tempChunks;
+
+                SVGCharacterLayoutInfo tempInfo(tempChars);
+                buildLayoutInformation(flowBox, tempInfo);
+
+                buildTextChunks(tempChars, tempChunks, flowBox);
+
+                Vector<SVGTextChunk>::iterator it = tempChunks.begin();
+                Vector<SVGTextChunk>::iterator end = tempChunks.end();
+
+                AffineTransform ctm;
+                float computedLength = 0.0f;
+ 
+                for (; it != end; ++it) {
+                    SVGTextChunk& chunk = *it;
+
+                    // Apply text-length calculation
+                    info.pathExtraAdvance += calculateTextLengthCorrectionForTextChunk(chunk, lengthAdjust, computedLength);
+
+                    if (lengthAdjust == SVGTextContentElement::LENGTHADJUST_SPACINGANDGLYPHS) {
+                        info.pathTextLength += computedLength;
+                        info.pathChunkLength += chunk.textLength;
+                    }
+
+                    // Calculate text-anchor start offset
+                    if (anchor == TA_START)
+                        continue;
+
+                    textAnchorStartOffset += calculateTextAnchorShiftForTextChunk(chunk, anchor);
+                }
+
+                info.addLayoutInformation(flowBox, textAnchorStartOffset);
+            }
+
+            float shiftxSaved = info.shiftx;
+            float shiftySaved = info.shifty;
+
+            buildLayoutInformation(flowBox, info);
+            info.processedChunk(shiftxSaved, shiftySaved);
+
+            if (isTextPath)
+                info.setInPathLayout(false);
+        }
+    }
+}
+
+void SVGRootInlineBox::layoutInlineBoxes()
+{
+    int lowX = INT_MAX;
+    int lowY = INT_MAX;
+    int highX = INT_MIN;
+    int highY = INT_MIN;
+
+    // Layout all child boxes
+    Vector<SVGChar>::iterator it = m_svgChars.begin(); 
+    layoutInlineBoxes(this, it, lowX, highX, lowY, highY);
+    ASSERT(it == m_svgChars.end());
+}
+
+void SVGRootInlineBox::layoutInlineBoxes(InlineFlowBox* start, Vector<SVGChar>::iterator& it, int& lowX, int& highX, int& lowY, int& highY)
+{
+    for (InlineBox* curr = start->firstChild(); curr; curr = curr->nextOnLine()) {
+        RenderStyle* style = curr->object()->style();    
+        const Font& font = style->font();
+
+        if (curr->object()->isText()) {
+            SVGInlineTextBox* textBox = static_cast<SVGInlineTextBox*>(curr);
+            unsigned length = textBox->len();
+
+            SVGChar curChar = *it; 
+            ASSERT(it != m_svgChars.end());  
+
+            FloatRect stringRect;
+            for (unsigned i = 0; i < length; ++i) {
+                ASSERT(it != m_svgChars.end());
+
+                if (it->isHidden()) {
+                    ++it;
+                    continue;
+                }
+
+                stringRect.unite(textBox->calculateGlyphBoundaries(style, textBox->start() + i, *it));
+                ++it;
+            }
+
+            IntRect enclosedStringRect = enclosingIntRect(stringRect);
+
+            int minX = enclosedStringRect.x();
+            int maxX = minX + enclosedStringRect.width();
+
+            int minY = enclosedStringRect.y();
+            int maxY = minY + enclosedStringRect.height();
+
+            curr->setXPos(minX - object()->xPos());
+            curr->setWidth(enclosedStringRect.width());
+
+            curr->setYPos(minY - object()->yPos());
+            curr->setBaseline(font.ascent());
+            curr->setHeight(enclosedStringRect.height());
+
+            if (minX < lowX)
+                lowX = minX;
+
+            if (maxX > highX)
+                highX = maxX;
+
+            if (minY < lowY)
+                lowY = minY;
+
+            if (maxY > highY)
+                highY = maxY;
+        } else {
+            ASSERT(curr->isInlineFlowBox());
+
+            int minX = INT_MAX;
+            int minY = INT_MAX;
+            int maxX = INT_MIN;
+            int maxY = INT_MIN;
+
+            InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(curr);
+            layoutInlineBoxes(flowBox, it, minX, maxX, minY, maxY);
+
+            curr->setXPos(minX - object()->xPos());
+            curr->setWidth(maxX - minX);
+
+            curr->setYPos(minY - object()->yPos());
+            curr->setBaseline(font.ascent());
+            curr->setHeight(maxY - minY);
+
+            if (minX < lowX)
+                lowX = minX;
+
+            if (maxX > highX)
+                highX = maxX;
+
+            if (minY < lowY)
+                lowY = minY;
+
+            if (maxY > highY)
+                highY = maxY;
+        }
+    }
+
+    if (start->isRootInlineBox()) {
+        int top = lowY - object()->yPos();
+        int bottom = highY - object()->yPos();
+
+        start->setXPos(lowX - object()->xPos());
+        start->setYPos(top);
+
+        start->setWidth(highX - lowX);
+        start->setHeight(highY - lowY);
+
+        start->setVerticalOverflowPositions(top, bottom);
+        start->setVerticalSelectionPositions(top, bottom);
+    }
+}
+
+void SVGRootInlineBox::buildLayoutInformationForTextBox(SVGCharacterLayoutInfo& info, InlineTextBox* textBox)
+{
+    RenderText* text = textBox->textObject();
+    ASSERT(text);
+
+    RenderStyle* style = text->style(textBox->isFirstLineStyle());
+    ASSERT(style);
+
+    const Font& font = style->font();
+    SVGInlineTextBox* svgTextBox = static_cast<SVGInlineTextBox*>(textBox);
+
+    unsigned length = textBox->len();
+
+    const SVGRenderStyle* svgStyle = style->svgStyle();
+    bool isVerticalText = isVerticalWritingMode(svgStyle);
+
+    for (unsigned i = 0; i < length; ++i) {
+        SVGChar svgChar;
+
+        if (info.inPathLayout())
+            svgChar.pathData = SVGCharOnPath::create();
+
+        float glyphWidth = 0.0f;
+        float glyphHeight = 0.0f;
+
+        if (textBox->m_reversed) {
+            glyphWidth = svgTextBox->calculateGlyphWidth(style, textBox->end() - i);
+            glyphHeight = svgTextBox->calculateGlyphHeight(style, textBox->end() - i);
+        } else {
+            glyphWidth = svgTextBox->calculateGlyphWidth(style, textBox->start() + i);
+            glyphHeight = svgTextBox->calculateGlyphHeight(style, textBox->start() + i);
+        }
+
+        bool assignedX = false;
+        bool assignedY = false;
+
+        if (info.xValueAvailable() && (!info.inPathLayout() || (info.inPathLayout() && !isVerticalText))) {
+            if (!isVerticalText)
+                svgChar.newTextChunk = true;
+
+            assignedX = true;
+            svgChar.drawnSeperated = true;
+            info.curx = info.xValueNext();
+        }
+
+        if (info.yValueAvailable() && (!info.inPathLayout() || (info.inPathLayout() && isVerticalText))) {
+            if (isVerticalText)
+                svgChar.newTextChunk = true;
+
+            assignedY = true;
+            svgChar.drawnSeperated = true;
+            info.cury = info.yValueNext();
+        }
+
+        float dx = 0.0f;
+        float dy = 0.0f;
+
+        // Apply x-axis shift
+        if (info.dxValueAvailable()) {
+            svgChar.drawnSeperated = true;
+
+            dx = info.dxValueNext();
+            info.dx += dx;
+
+            if (!info.inPathLayout())
+                info.curx += dx;
+        }
+
+        // Apply y-axis shift
+        if (info.dyValueAvailable()) {
+            svgChar.drawnSeperated = true;
+
+            dy = info.dyValueNext();
+            info.dy += dy;
+
+            if (!info.inPathLayout())
+                info.cury += dy;
+        }
+
+        // Take letter & word spacing and kerning into account
+        float spacing = font.letterSpacing() + calculateKerning(textBox->object()->element()->renderer());
+
+        const UChar* currentCharacter = text->characters() + (textBox->m_reversed ? textBox->end() - i : textBox->start() + i);
+        const UChar* lastCharacter = 0;
+
+        if (textBox->m_reversed) {
+            if (i < textBox->end())
+                lastCharacter = text->characters() + textBox->end() - i +  1;
+        } else {
+            if (i > 0)
+                lastCharacter = text->characters() + textBox->start() + i - 1;
+        }
+
+        if (info.nextDrawnSeperated || spacing != 0.0f) {
+            info.nextDrawnSeperated = false;
+            svgChar.drawnSeperated = true;
+        }
+
+        if (currentCharacter && Font::treatAsSpace(*currentCharacter) && lastCharacter && !Font::treatAsSpace(*lastCharacter)) {
+            spacing += font.wordSpacing();
+
+            if (spacing != 0.0f && !info.inPathLayout())
+                info.nextDrawnSeperated = true;
+        }
+
+        float orientationAngle = glyphOrientationToAngle(svgStyle, isVerticalText, *currentCharacter);
+
+        float xOrientationShift = 0.0f;
+        float yOrientationShift = 0.0f;
+        float glyphAdvance = calculateGlyphAdvanceAndShiftRespectingOrientation(isVerticalText, orientationAngle, glyphWidth, glyphHeight,
+                                                                                font, svgChar, xOrientationShift, yOrientationShift);
+
+        // Handle textPath layout mode
+        if (info.inPathLayout()) {
+            float extraAdvance = isVerticalText ? dy : dx;
+            float newOffset = FLT_MIN;
+
+            if (assignedX && !isVerticalText)
+                newOffset = info.curx;
+            else if (assignedY && isVerticalText)
+                newOffset = info.cury;
+
+            float correctedGlyphAdvance = glyphAdvance;
+
+            // Handle lengthAdjust="spacingAndGlyphs" by specifying per-character scale operations
+            if (info.pathTextLength > 0.0f && info.pathChunkLength > 0.0f) { 
+                if (isVerticalText) {
+                    svgChar.pathData->yScale = info.pathChunkLength / info.pathTextLength;
+                    spacing *= svgChar.pathData->yScale;
+                    correctedGlyphAdvance *= svgChar.pathData->yScale;
+                } else {
+                    svgChar.pathData->xScale = info.pathChunkLength / info.pathTextLength;
+                    spacing *= svgChar.pathData->xScale;
+                    correctedGlyphAdvance *= svgChar.pathData->xScale;
+                }
+            }
+
+            // Handle letter & word spacing on text path
+            float pathExtraAdvance = info.pathExtraAdvance;
+            info.pathExtraAdvance += spacing;
+
+            svgChar.pathData->hidden = !info.nextPathLayoutPointAndAngle(correctedGlyphAdvance, extraAdvance, newOffset);
+            svgChar.drawnSeperated = true;
+
+            info.pathExtraAdvance = pathExtraAdvance;
+        }
+
+        // Apply rotation
+        if (info.angleValueAvailable())
+            info.angle = info.angleValueNext();
+
+        // Apply baseline-shift
+        if (info.baselineShiftValueAvailable()) {
+            svgChar.drawnSeperated = true;
+            float shift = info.baselineShiftValueNext();
+
+            if (isVerticalText)
+                info.shiftx += shift;
+            else
+                info.shifty -= shift;
+        }
+
+        // Take dominant-baseline / alignment-baseline into account
+        yOrientationShift += alignmentBaselineToShift(isVerticalText, text, font);
+
+        svgChar.x = info.curx;
+        svgChar.y = info.cury;
+        svgChar.angle = info.angle;
+
+        // For text paths any shift (dx/dy/baseline-shift) has to be applied after the rotation
+        if (!info.inPathLayout()) {
+            svgChar.x += info.shiftx + xOrientationShift;
+            svgChar.y += info.shifty + yOrientationShift;
+
+            if (orientationAngle != 0.0f)
+                svgChar.angle += orientationAngle;
+
+            if (svgChar.angle != 0.0f)
+                svgChar.drawnSeperated = true;
+        } else {
+            svgChar.pathData->orientationAngle = orientationAngle;
+
+            if (isVerticalText)
+                svgChar.angle -= 90.0f;
+
+            svgChar.pathData->xShift = info.shiftx + xOrientationShift;
+            svgChar.pathData->yShift = info.shifty + yOrientationShift;
+
+            // Translate to glyph midpoint
+            if (isVerticalText) {
+                svgChar.pathData->xShift += info.dx;
+                svgChar.pathData->yShift -= glyphAdvance / 2.0f;
+            } else {
+                svgChar.pathData->xShift -= glyphAdvance / 2.0f;
+                svgChar.pathData->yShift += info.dy;
+            }
+        }
+
+        // Advance to new position
+        if (isVerticalText) {
+            svgChar.drawnSeperated = true;
+            info.cury += glyphAdvance + spacing;
+        } else
+            info.curx += glyphAdvance + spacing;
+
+        // Advance to next character
+        info.svgChars.append(svgChar);
+        info.processedSingleCharacter();
+    }
+}
+
+void SVGRootInlineBox::buildTextChunks(Vector<SVGChar>& svgChars, Vector<SVGTextChunk>& svgTextChunks, InlineFlowBox* start)
+{
+    SVGTextChunkLayoutInfo info(svgTextChunks);
+    info.it = svgChars.begin();
+    info.chunk.start = svgChars.begin();
+    info.chunk.end = svgChars.begin();
+
+    buildTextChunks(svgChars, start, info);
+    ASSERT(info.it == svgChars.end());
+}
+
+void SVGRootInlineBox::buildTextChunks(Vector<SVGChar>& svgChars, InlineFlowBox* start, SVGTextChunkLayoutInfo& info)
+{
+#if DEBUG_CHUNK_BUILDING > 1
+    fprintf(stderr, " -> buildTextChunks(start=%p)\n", start);
+#endif
+
+    for (InlineBox* curr = start->firstChild(); curr; curr = curr->nextOnLine()) {
+        if (curr->object()->isText()) {
+            InlineTextBox* textBox = static_cast<InlineTextBox*>(curr);
+
+            unsigned length = textBox->len();
+            if (!length)
+                continue;
+
+#if DEBUG_CHUNK_BUILDING > 1
+            fprintf(stderr, " -> Handle inline text box (%p) with %i characters (start: %i, end: %i), handlingTextPath=%i\n",
+                            textBox, length, textBox->start(), textBox->end(), (int) info.handlingTextPath);
+#endif
+
+            RenderText* text = textBox->textObject();
+            ASSERT(text);
+            ASSERT(text->element());
+
+            SVGTextContentElement* textContent = 0;
+            Node* node = text->element()->parent();
+            if (node && node->isSVGElement())
+                textContent = static_cast<SVGTextContentElement*>(node);
+            ASSERT(textContent);
+
+            // Start new character range for the first chunk
+            bool isFirstCharacter = info.svgTextChunks.isEmpty() && info.chunk.start == info.it && info.chunk.start == info.chunk.end;
+            if (isFirstCharacter) {
+                ASSERT(info.chunk.boxes.isEmpty());
+                info.chunk.boxes.append(SVGInlineBoxCharacterRange());
+            } else
+                ASSERT(!info.chunk.boxes.isEmpty());
+
+            // Walk string to find out new chunk positions, if existant
+            for (unsigned i = 0; i < length; ++i) {
+                ASSERT(info.it != svgChars.end());
+
+                SVGInlineBoxCharacterRange& range = info.chunk.boxes.last();
+                if (range.isOpen()) {
+                    range.box = curr;
+                    range.startOffset = (i == 0 ? 0 : i - 1);
+
+#if DEBUG_CHUNK_BUILDING > 1
+                    fprintf(stderr, " | -> Range is open! box=%p, startOffset=%i\n", range.box, range.startOffset);
+#endif
+                }
+
+                // If a new (or the first) chunk has been started, record it's text-anchor and writing mode.
+                if (info.assignChunkProperties) {
+                    info.assignChunkProperties = false;
+
+                    info.chunk.isVerticalText = isVerticalWritingMode(text->style()->svgStyle());
+                    info.chunk.isTextPath = info.handlingTextPath;
+                    info.chunk.anchor = text->style()->svgStyle()->textAnchor();
+                    info.chunk.textLength = textContent->textLength().value();
+                    info.chunk.lengthAdjust = (ELengthAdjust) textContent->lengthAdjust();
+
+#if DEBUG_CHUNK_BUILDING > 1
+                    fprintf(stderr, " | -> Assign chunk properties, isVerticalText=%i, anchor=%i\n", info.chunk.isVerticalText, info.chunk.anchor);
+#endif
+                }
+
+                if (i > 0 && !isFirstCharacter && (*info.it).newTextChunk) {
+                    // Close mid chunk & character range
+                    ASSERT(!range.isOpen());
+                    ASSERT(!range.isClosed());
+
+                    range.endOffset = i;
+                    closeTextChunk(info);
+
+#if DEBUG_CHUNK_BUILDING > 1
+                    fprintf(stderr, " | -> Close mid-text chunk, at endOffset: %i and starting new mid chunk!\n", range.endOffset);
+#endif
+    
+                    // Prepare for next chunk, if we're not at the end
+                    startTextChunk(info);
+                    if (i + 1 == length) {
+#if DEBUG_CHUNK_BUILDING > 1
+                        fprintf(stderr, " | -> Record last chunk of inline text box!\n");
+#endif
+
+                        startTextChunk(info);
+                        SVGInlineBoxCharacterRange& range = info.chunk.boxes.last();
+
+                        info.assignChunkProperties = false;
+                        info.chunk.isVerticalText = isVerticalWritingMode(text->style()->svgStyle());
+                        info.chunk.isTextPath = info.handlingTextPath;
+                        info.chunk.anchor = text->style()->svgStyle()->textAnchor();
+                        info.chunk.textLength = textContent->textLength().value();
+                        info.chunk.lengthAdjust = (ELengthAdjust) textContent->lengthAdjust();
+
+                        range.box = curr;
+                        range.startOffset = i;
+
+                        ASSERT(!range.isOpen());
+                        ASSERT(!range.isClosed());
+                    }
+                }
+
+                // This should only hold true for the first character of the first chunk
+                if (isFirstCharacter)
+                    isFirstCharacter = false;
+    
+                ++info.it;
+            }
+
+#if DEBUG_CHUNK_BUILDING > 1    
+            fprintf(stderr, " -> Finished inline text box!\n");
+#endif
+
+            SVGInlineBoxCharacterRange& range = info.chunk.boxes.last();
+            if (!range.isOpen() && !range.isClosed()) {
+#if DEBUG_CHUNK_BUILDING > 1
+                fprintf(stderr, " -> Last range not closed - closing with endOffset: %i\n", length);
+#endif
+
+                // Current text chunk is not yet closed. Finish the current range, but don't start a new chunk.
+                range.endOffset = length;
+
+                if (info.it != svgChars.end()) {
+#if DEBUG_CHUNK_BUILDING > 1
+                    fprintf(stderr, " -> Not at last character yet!\n");
+#endif
+
+                    // If we're not at the end of the last box to be processed, and if the next
+                    // character starts a new chunk, then close the current chunk and start a new one.
+                    if ((*info.it).newTextChunk) {
+#if DEBUG_CHUNK_BUILDING > 1
+                        fprintf(stderr, " -> Next character starts new chunk! Closing current chunk, and starting a new one...\n");
+#endif
+
+                        closeTextChunk(info);
+                        startTextChunk(info);
+                    } else {
+                        // Just start a new character range
+                        info.chunk.boxes.append(SVGInlineBoxCharacterRange());
+
+#if DEBUG_CHUNK_BUILDING > 1
+                        fprintf(stderr, " -> Next character does NOT start a new chunk! Starting new character range...\n");
+#endif
+                    }
+                } else {
+#if DEBUG_CHUNK_BUILDING > 1
+                    fprintf(stderr, " -> Closing final chunk! Finished processing!\n");
+#endif
+
+                    // Close final chunk, once we're at the end of the last box
+                    closeTextChunk(info);
+                }
+            }
+        } else {
+            ASSERT(curr->isInlineFlowBox());
+            InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(curr);
+
+            bool isTextPath = flowBox->object()->element()->hasTagName(SVGNames::textPathTag);
+
+#if DEBUG_CHUNK_BUILDING > 1
+            fprintf(stderr, " -> Handle inline flow box (%p), isTextPath=%i\n", flowBox, (int) isTextPath);
+#endif
+
+            if (isTextPath)
+                info.handlingTextPath = true;
+
+            buildTextChunks(svgChars, flowBox, info);
+
+            if (isTextPath)
+                info.handlingTextPath = false;
+        }
+    }
+
+#if DEBUG_CHUNK_BUILDING > 1
+    fprintf(stderr, " <- buildTextChunks(start=%p)\n", start);
+#endif
+}
+
+const Vector<SVGTextChunk>& SVGRootInlineBox::svgTextChunks() const 
+{
+    return m_svgTextChunks;
+}
+
+void SVGRootInlineBox::layoutTextChunks()
+{
+    Vector<SVGTextChunk>::iterator it = m_svgTextChunks.begin();
+    Vector<SVGTextChunk>::iterator end = m_svgTextChunks.end();
+
+    for (; it != end; ++it) {
+        SVGTextChunk& chunk = *it;
+
+#if DEBUG_CHUNK_BUILDING > 0
+        {
+            fprintf(stderr, "Handle TEXT CHUNK! anchor=%i, textLength=%f, lengthAdjust=%i, isVerticalText=%i, isTextPath=%i start=%p, end=%p -> dist: %i\n",
+                    (int) chunk.anchor, chunk.textLength, (int) chunk.lengthAdjust, (int) chunk.isVerticalText,
+                    (int) chunk.isTextPath, chunk.start, chunk.end, (unsigned int) (chunk.end - chunk.start));
+
+            Vector<SVGInlineBoxCharacterRange>::iterator boxIt = chunk.boxes.begin();
+            Vector<SVGInlineBoxCharacterRange>::iterator boxEnd = chunk.boxes.end();
+
+            unsigned int i = 0;
+            for (; boxIt != boxEnd; ++boxIt) {
+                SVGInlineBoxCharacterRange& range = *boxIt; i++;
+                fprintf(stderr, " -> RANGE %i STARTOFFSET: %i, ENDOFFSET: %i, BOX: %p\n", i, range.startOffset, range.endOffset, range.box);
+            }
+        }
+#endif
+
+        if (chunk.isTextPath)
+            continue;
+
+        // text-path & textLength, with lengthAdjust="spacing" is already handled for textPath layouts.
+        applyTextLengthCorrectionToTextChunk(chunk);
+ 
+        // text-anchor is already handled for textPath layouts.
+        applyTextAnchorToTextChunk(chunk);
+    }
+}
+
+static inline void addPaintServerToTextDecorationInfo(ETextDecoration decoration, SVGTextDecorationInfo& info, RenderObject* object)
+{
+    if (object->style()->svgStyle()->hasFill())
+        info.fillServerMap.set(decoration, object);
+
+    if (object->style()->svgStyle()->hasStroke())
+        info.strokeServerMap.set(decoration, object);
+}
+
+SVGTextDecorationInfo SVGRootInlineBox::retrievePaintServersForTextDecoration(RenderObject* start)
+{
+    ASSERT(start);
+
+    Vector<RenderObject*> parentChain;
+    while ((start = start->parent())) {
+        parentChain.prepend(start);
+
+        // Stop at our direct <text> parent.
+        if (start->isSVGText())
+            break;
+    }
+
+    Vector<RenderObject*>::iterator it = parentChain.begin();
+    Vector<RenderObject*>::iterator end = parentChain.end();
+
+    SVGTextDecorationInfo info;
+
+    for (; it != end; ++it) {
+        RenderObject* object = *it;
+        ASSERT(object);
+
+        RenderStyle* style = object->style();
+        ASSERT(style);
+
+        int decorations = style->textDecoration();
+        if (decorations != NONE) {
+            if (decorations & OVERLINE)
+                addPaintServerToTextDecorationInfo(OVERLINE, info, object);
+
+            if (decorations & UNDERLINE)
+                addPaintServerToTextDecorationInfo(UNDERLINE, info, object);
+
+            if (decorations & LINE_THROUGH)
+                addPaintServerToTextDecorationInfo(LINE_THROUGH, info, object);
+        }
+    }
+
+    return info;
+}
+
+void SVGRootInlineBox::walkTextChunks(SVGTextChunkWalkerBase* walker, const SVGInlineTextBox* textBox)
+{
+    ASSERT(walker);
+
+    Vector<SVGTextChunk>::iterator it = m_svgTextChunks.begin();
+    Vector<SVGTextChunk>::iterator itEnd = m_svgTextChunks.end();
+
+    for (; it != itEnd; ++it) {
+        SVGTextChunk& curChunk = *it;
+
+        Vector<SVGInlineBoxCharacterRange>::iterator boxIt = curChunk.boxes.begin();
+        Vector<SVGInlineBoxCharacterRange>::iterator boxEnd = curChunk.boxes.end();
+
+        InlineBox* lastNotifiedBox = 0;
+        InlineBox* prevBox = 0;
+
+        unsigned int chunkOffset = 0;
+        bool startedFirstChunk = false;
+
+        for (; boxIt != boxEnd; ++boxIt) {
+            SVGInlineBoxCharacterRange& range = *boxIt;
+
+            ASSERT(range.box->isInlineTextBox());
+            SVGInlineTextBox* rangeTextBox = static_cast<SVGInlineTextBox*>(range.box);
+
+            if (textBox && rangeTextBox != textBox) {
+                chunkOffset += range.endOffset - range.startOffset;
+                continue;
+            }
+
+            // Eventually notify that we started a new chunk
+            if (!textBox && !startedFirstChunk) {
+                startedFirstChunk = true;
+
+                lastNotifiedBox = range.box;
+                walker->start(range.box);
+            } else {
+                // Eventually apply new style, as this chunk spans multiple boxes (with possible different styling)
+                if (prevBox && prevBox != range.box) {
+                    lastNotifiedBox = range.box;
+
+                    walker->end(prevBox);
+                    walker->start(lastNotifiedBox);
+                }
+            }
+
+            unsigned int length = range.endOffset - range.startOffset;
+
+            Vector<SVGChar>::iterator itCharBegin = curChunk.start + chunkOffset;
+            Vector<SVGChar>::iterator itCharEnd = curChunk.start + chunkOffset + length;
+            ASSERT(itCharEnd <= curChunk.end);
+
+            // Process this chunk portion
+            if (textBox)
+                (*walker)(rangeTextBox, range.startOffset, curChunk.ctm, itCharBegin, itCharEnd);
+            else {
+                if (walker->setupFill(range.box))
+                    (*walker)(rangeTextBox, range.startOffset, curChunk.ctm, itCharBegin, itCharEnd);
+
+                if (walker->setupStroke(range.box))
+                    (*walker)(rangeTextBox, range.startOffset, curChunk.ctm, itCharBegin, itCharEnd);
+            }
+
+            chunkOffset += length;
+
+            if (!textBox)
+                prevBox = range.box;
+        }
+
+        if (!textBox && startedFirstChunk)
+            walker->end(lastNotifiedBox);
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(SVG)