TextRun SVGTextMetrics::constructTextRun(LineLayoutSVGInlineText textLayoutItem, unsigned position, unsigned length, TextDirection textDirection)
{
const ComputedStyle& style = textLayoutItem.styleRef();
TextRun run(static_cast<const LChar*>(nullptr) // characters, will be set below if non-zero.
, 0 // length, will be set below if non-zero.
, 0 // xPos, only relevant with allowTabs=true
, 0 // padding, only relevant for justified text, not relevant for SVG
, TextRun::AllowTrailingExpansion
, textDirection
, isOverride(style.unicodeBidi()) /* directionalOverride */);
if (length) {
if (textLayoutItem.is8Bit())
run.setText(textLayoutItem.characters8() + position, length);
else
run.setText(textLayoutItem.characters16() + position, length);
}
// We handle letter & word spacing ourselves.
run.disableSpacing();
// Propagate the maximum length of the characters buffer to the TextRun, even when we're only processing a substring.
run.setCharactersLength(textLayoutItem.textLength() - position);
ASSERT(run.charactersLength() >= run.length());
return run;
}
bool SVGInlineTextBox::nodeAtPoint(HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit, LayoutUnit)
{
// FIXME: integrate with InlineTextBox::nodeAtPoint better.
ASSERT(!isLineBreak());
PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_TEXT_HITTESTING, result.hitTestRequest(), lineLayoutItem().style()->pointerEvents());
bool isVisible = lineLayoutItem().style()->visibility() == VISIBLE;
if (isVisible || !hitRules.requireVisible) {
if (hitRules.canHitBoundingBox
|| (hitRules.canHitStroke && (lineLayoutItem().style()->svgStyle().hasStroke() || !hitRules.requireStroke))
|| (hitRules.canHitFill && (lineLayoutItem().style()->svgStyle().hasFill() || !hitRules.requireFill))) {
LayoutPoint boxOrigin(x(), y());
boxOrigin.moveBy(accumulatedOffset);
LayoutRect rect(boxOrigin, size());
if (locationInContainer.intersects(rect)) {
LineLayoutSVGInlineText lineLayoutItem = LineLayoutSVGInlineText(this->lineLayoutItem());
ASSERT(lineLayoutItem.scalingFactor());
float baseline = lineLayoutItem.scaledFont().fontMetrics().floatAscent() / lineLayoutItem.scalingFactor();
FloatPoint floatLocation = FloatPoint(locationInContainer.point());
for (const SVGTextFragment& fragment : m_textFragments) {
FloatQuad fragmentQuad = fragment.boundingQuad(baseline);
if (fragmentQuad.containsPoint(floatLocation)) {
lineLayoutItem.updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset));
if (!result.addNodeToListBasedTestResult(lineLayoutItem.node(), locationInContainer, rect))
return true;
}
}
}
}
}
return false;
}
static inline FloatRect calculateFragmentBoundaries(LineLayoutSVGInlineText textLineLayout, const SVGTextFragment& fragment)
{
float scalingFactor = textLineLayout.scalingFactor();
ASSERT(scalingFactor);
float baseline = textLineLayout.scaledFont().fontMetrics().floatAscent() / scalingFactor;
return fragment.boundingBox(baseline);
}
int SVGInlineTextBox::offsetForPositionInFragment(
const SVGTextFragment& fragment,
LayoutUnit position,
bool includePartialGlyphs) const {
LineLayoutSVGInlineText lineLayoutItem =
LineLayoutSVGInlineText(this->getLineLayoutItem());
float scalingFactor = lineLayoutItem.scalingFactor();
ASSERT(scalingFactor);
const ComputedStyle& style = lineLayoutItem.styleRef();
TextRun textRun = constructTextRun(style, fragment);
// Eventually handle lengthAdjust="spacingAndGlyphs".
// FIXME: Handle vertical text.
if (fragment.isTransformed()) {
AffineTransform fragmentTransform = fragment.buildFragmentTransform();
textRun.setHorizontalGlyphStretch(
clampTo<float>(fragmentTransform.xScale()));
}
return fragment.characterOffset - start() +
lineLayoutItem.scaledFont().offsetForPosition(
textRun, position * scalingFactor, includePartialGlyphs);
}
FloatRect SVGInlineTextBox::selectionRectForTextFragment(
const SVGTextFragment& fragment,
int startPosition,
int endPosition,
const ComputedStyle& style) const {
ASSERT(startPosition < endPosition);
LineLayoutSVGInlineText lineLayoutItem =
LineLayoutSVGInlineText(this->getLineLayoutItem());
float scalingFactor = lineLayoutItem.scalingFactor();
ASSERT(scalingFactor);
const Font& scaledFont = lineLayoutItem.scaledFont();
const SimpleFontData* fontData = scaledFont.primaryFont();
DCHECK(fontData);
if (!fontData)
return FloatRect();
const FontMetrics& scaledFontMetrics = fontData->getFontMetrics();
FloatPoint textOrigin(fragment.x, fragment.y);
if (scalingFactor != 1)
textOrigin.scale(scalingFactor, scalingFactor);
textOrigin.move(0, -scaledFontMetrics.floatAscent());
FloatRect selectionRect = scaledFont.selectionRectForText(
constructTextRun(style, fragment), textOrigin,
fragment.height * scalingFactor, startPosition, endPosition);
if (scalingFactor == 1)
return selectionRect;
selectionRect.scale(1 / scalingFactor);
return selectionRect;
}
// Execute a query in "logical" order starting at |queryRoot|. This means
// walking the lines boxes for each layout object in layout tree (pre)order.
static void logicalQuery(LayoutObject* queryRoot, QueryData* queryData, ProcessTextFragmentCallback fragmentCallback)
{
if (!queryRoot)
return;
// Walk the layout tree in pre-order, starting at the specified root, and
// run the query for each text node.
Vector<SVGInlineTextBox*> textBoxes;
for (LayoutObject* layoutObject = queryRoot->slowFirstChild(); layoutObject; layoutObject = layoutObject->nextInPreOrder(queryRoot)) {
if (!layoutObject->isSVGInlineText())
continue;
LineLayoutSVGInlineText textLineLayout = LineLayoutSVGInlineText(toLayoutSVGInlineText(layoutObject));
ASSERT(textLineLayout.style());
// TODO(fs): Allow filtering the search earlier, since we should be
// able to trivially reject (prune) at least some of the queries.
collectTextBoxesInLogicalOrder(textLineLayout, textBoxes);
for (const SVGInlineTextBox* textBox : textBoxes) {
if (queryTextBox(queryData, textBox, fragmentCallback))
return;
queryData->currentOffset += textBox->len();
}
}
}
static inline FloatRect calculateFragmentBoundaries(LineLayoutSVGInlineText textLineLayout, const SVGTextFragment& fragment)
{
float scalingFactor = textLineLayout.scalingFactor();
ASSERT(scalingFactor);
float baseline = textLineLayout.scaledFont().fontMetrics().floatAscent() / scalingFactor;
AffineTransform fragmentTransform;
FloatRect fragmentRect(fragment.x, fragment.y - baseline, fragment.width, fragment.height);
fragment.buildFragmentTransform(fragmentTransform);
return fragmentTransform.mapRect(fragmentRect);
}
SVGTextMetrics::SVGTextMetrics(LineLayoutSVGInlineText textLayoutItem, unsigned length, float width)
{
ASSERT(textLayoutItem);
float scalingFactor = textLayoutItem.scalingFactor();
ASSERT(scalingFactor);
m_width = width / scalingFactor;
m_height = textLayoutItem.scaledFont().fontMetrics().floatHeight() / scalingFactor;
m_length = length;
}
LayoutRect SVGInlineTextBox::calculateBoundaries() const
{
LineLayoutSVGInlineText lineLayoutItem = LineLayoutSVGInlineText(this->lineLayoutItem());
float scalingFactor = lineLayoutItem.scalingFactor();
ASSERT(scalingFactor);
LayoutUnit baseline = lineLayoutItem.scaledFont().fontMetrics().floatAscent() / scalingFactor;
LayoutRect textBoundingRect;
for (const SVGTextFragment& fragment : m_textFragments)
textBoundingRect.unite(LayoutRect(fragment.overflowBoundingBox(baseline)));
return textBoundingRect;
}
SVGTextMetrics::SVGTextMetrics(LineLayoutSVGInlineText textLayoutItem, const TextRun& run)
{
ASSERT(textLayoutItem);
float scalingFactor = textLayoutItem.scalingFactor();
ASSERT(scalingFactor);
const Font& scaledFont = textLayoutItem.scaledFont();
// Calculate width/height using the scaled font, divide this result by the scalingFactor afterwards.
m_width = scaledFont.width(run) / scalingFactor;
m_height = scaledFont.fontMetrics().floatHeight() / scalingFactor;
ASSERT(run.length() >= 0);
m_length = static_cast<unsigned>(run.length());
}
static void collectTextBoxesInLogicalOrder(LineLayoutSVGInlineText textLineLayout, Vector<SVGInlineTextBox*>& textBoxes)
{
textBoxes.shrink(0);
for (InlineTextBox* textBox = textLineLayout.firstTextBox(); textBox; textBox = textBox->nextTextBox())
textBoxes.append(toSVGInlineTextBox(textBox));
std::sort(textBoxes.begin(), textBoxes.end(), InlineTextBox::compareByStart);
}
LayoutRect SVGInlineTextBox::calculateBoundaries() const {
LineLayoutSVGInlineText lineLayoutItem =
LineLayoutSVGInlineText(this->getLineLayoutItem());
const SimpleFontData* fontData = lineLayoutItem.scaledFont().primaryFont();
DCHECK(fontData);
if (!fontData)
return LayoutRect();
float scalingFactor = lineLayoutItem.scalingFactor();
ASSERT(scalingFactor);
LayoutUnit baseline(fontData->getFontMetrics().floatAscent() / scalingFactor);
LayoutRect textBoundingRect;
for (const SVGTextFragment& fragment : m_textFragments)
textBoundingRect.unite(LayoutRect(fragment.overflowBoundingBox(baseline)));
return textBoundingRect;
}
void SVGTextLayoutEngine::layoutInlineTextBox(SVGInlineTextBox* textBox)
{
ASSERT(textBox);
LineLayoutSVGInlineText textLineLayout = LineLayoutSVGInlineText(textBox->lineLayoutItem());
ASSERT(textLineLayout.parent());
ASSERT(textLineLayout.parent().node());
ASSERT(textLineLayout.parent().node()->isSVGElement());
const ComputedStyle& style = textLineLayout.styleRef();
textBox->clearTextFragments();
m_isVerticalText = !style.isHorizontalWritingMode();
layoutTextOnLineOrPath(textBox, textLineLayout, style);
if (m_inPathLayout)
return;
m_lineLayoutBoxes.append(textBox);
}
void SVGTextMetricsCalculator::setupBidiRuns()
{
const ComputedStyle& style = m_text.styleRef();
m_textDirection = style.direction();
if (isOverride(style.unicodeBidi()))
return;
BidiStatus status(LTR, false);
status.last = status.lastStrong = WTF::Unicode::OtherNeutral;
m_bidiResolver.setStatus(status);
m_bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&m_run, 0));
const bool hardLineBreak = false;
const bool reorderRuns = false;
m_bidiResolver.createBidiRunsForLine(TextRunIterator(&m_run, m_run.length()), NoVisualOverride, hardLineBreak, reorderRuns);
BidiRunList<BidiCharacterRun>& bidiRuns = m_bidiResolver.runs();
m_bidiRun = bidiRuns.firstRun();
}
bool SVGInlineTextBox::nodeAtPoint(HitTestResult& result,
const HitTestLocation& locationInContainer,
const LayoutPoint& accumulatedOffset,
LayoutUnit,
LayoutUnit) {
// FIXME: integrate with InlineTextBox::nodeAtPoint better.
ASSERT(!isLineBreak());
PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_TEXT_HITTESTING,
result.hitTestRequest(),
getLineLayoutItem().style()->pointerEvents());
bool isVisible =
getLineLayoutItem().style()->visibility() == EVisibility::Visible;
if (isVisible || !hitRules.requireVisible) {
if (hitRules.canHitBoundingBox ||
(hitRules.canHitStroke &&
(getLineLayoutItem().style()->svgStyle().hasStroke() ||
!hitRules.requireStroke)) ||
(hitRules.canHitFill &&
(getLineLayoutItem().style()->svgStyle().hasFill() ||
!hitRules.requireFill))) {
LayoutRect rect(topLeft(), LayoutSize(logicalWidth(), logicalHeight()));
rect.moveBy(accumulatedOffset);
if (locationInContainer.intersects(rect)) {
LineLayoutSVGInlineText lineLayoutItem =
LineLayoutSVGInlineText(this->getLineLayoutItem());
const SimpleFontData* fontData =
lineLayoutItem.scaledFont().primaryFont();
DCHECK(fontData);
if (!fontData)
return false;
DCHECK(lineLayoutItem.scalingFactor());
float baseline = fontData->getFontMetrics().floatAscent() /
lineLayoutItem.scalingFactor();
FloatPoint floatLocation = FloatPoint(locationInContainer.point());
for (const SVGTextFragment& fragment : m_textFragments) {
FloatQuad fragmentQuad = fragment.boundingQuad(baseline);
if (fragmentQuad.containsPoint(floatLocation)) {
lineLayoutItem.updateHitTestResult(
result,
locationInContainer.point() - toLayoutSize(accumulatedOffset));
if (result.addNodeToListBasedTestResult(lineLayoutItem.node(),
locationInContainer,
rect) == StopHitTesting)
return true;
}
}
}
}
}
return false;
}
void SVGTextLayoutEngine::layoutTextOnLineOrPath(SVGInlineTextBox* textBox, LineLayoutSVGInlineText textLineLayout, const ComputedStyle& style)
{
if (m_inPathLayout && !m_textPathCalculator)
return;
// Find the start of the current text box in the metrics list.
m_visualMetricsIterator.advanceToTextStart(&textLineLayout, textBox->start());
const Font& font = style.font();
SVGTextLayoutEngineSpacing spacingLayout(font, style.effectiveZoom());
SVGTextLayoutEngineBaseline baselineLayout(font, style.effectiveZoom());
bool didStartTextFragment = false;
bool applySpacingToNextCharacter = false;
float lastAngle = 0;
float baselineShift = baselineLayout.calculateBaselineShift(style);
baselineShift -= baselineLayout.calculateAlignmentBaselineShift(m_isVerticalText, textLineLayout);
// Main layout algorithm.
const unsigned boxEndOffset = textBox->start() + textBox->len();
while (!m_visualMetricsIterator.isAtEnd() && m_visualMetricsIterator.characterOffset() < boxEndOffset) {
const SVGTextMetrics& visualMetrics = m_visualMetricsIterator.metrics();
if (visualMetrics.isEmpty()) {
m_visualMetricsIterator.next();
continue;
}
SVGTextLayoutAttributes* logicalAttributes = nullptr;
if (!currentLogicalCharacterAttributes(logicalAttributes))
break;
ASSERT(logicalAttributes);
SVGTextMetrics logicalMetrics(SVGTextMetrics::SkippedSpaceMetrics);
if (!currentLogicalCharacterMetrics(logicalAttributes, logicalMetrics))
break;
SVGCharacterDataMap& characterDataMap = logicalAttributes->characterDataMap();
SVGCharacterData data;
SVGCharacterDataMap::iterator it = characterDataMap.find(m_logicalCharacterOffset + 1);
if (it != characterDataMap.end())
data = it->value;
float x = data.x;
float y = data.y;
// When we've advanced to the box start offset, determine using the original x/y values,
// whether this character starts a new text chunk, before doing any further processing.
if (m_visualMetricsIterator.characterOffset() == textBox->start())
textBox->setStartsNewTextChunk(logicalAttributes->context()->characterStartsNewTextChunk(m_logicalCharacterOffset));
float angle = SVGTextLayoutAttributes::isEmptyValue(data.rotate) ? 0 : data.rotate;
// Calculate glyph orientation angle.
// Font::width() calculates the resolved FontOrientation for each character,
// but is not exposed today to avoid the API complexity.
UChar32 currentCharacter = textLineLayout.codepointAt(m_visualMetricsIterator.characterOffset());
FontOrientation fontOrientation = font.fontDescription().orientation();
fontOrientation = adjustOrientationForCharacterInMixedVertical(fontOrientation, currentCharacter);
// Calculate glyph advance.
// Shaping engine takes care of x/y orientation shifts for different fontOrientation values.
float glyphAdvance = visualMetrics.advance(fontOrientation);
// Assign current text position to x/y values, if needed.
updateCharacterPositionIfNeeded(x, y);
// Apply dx/dy value adjustments to current text position, if needed.
updateRelativePositionAdjustmentsIfNeeded(data.dx, data.dy);
// Calculate CSS 'letter-spacing' and 'word-spacing' for next character, if needed.
float spacing = spacingLayout.calculateCSSSpacing(currentCharacter);
float textPathOffset = 0;
float textPathShiftX = 0;
float textPathShiftY = 0;
if (m_inPathLayout) {
float scaledGlyphAdvance = glyphAdvance * m_textPathScaling;
if (m_isVerticalText) {
// If there's an absolute y position available, it marks the beginning of a new position along the path.
if (!SVGTextLayoutAttributes::isEmptyValue(y))
m_textPathCurrentOffset = y + m_textPathStartOffset;
m_textPathCurrentOffset += m_dy;
m_dy = 0;
// Apply dx/dy correction and setup translations that move to the glyph midpoint.
textPathShiftX += m_dx + baselineShift;
textPathShiftY -= scaledGlyphAdvance / 2;
} else {
// If there's an absolute x position available, it marks the beginning of a new position along the path.
if (!SVGTextLayoutAttributes::isEmptyValue(x))
m_textPathCurrentOffset = x + m_textPathStartOffset;
m_textPathCurrentOffset += m_dx;
m_dx = 0;
// Apply dx/dy correction and setup translations that move to the glyph midpoint.
textPathShiftX -= scaledGlyphAdvance / 2;
textPathShiftY += m_dy - baselineShift;
}
// Calculate current offset along path.
textPathOffset = m_textPathCurrentOffset + scaledGlyphAdvance / 2;
// Move to next character.
m_textPathCurrentOffset += scaledGlyphAdvance + m_textPathSpacing + spacing * m_textPathScaling;
// Skip character, if we're before the path.
if (textPathOffset < 0) {
advanceToNextLogicalCharacter(logicalMetrics);
m_visualMetricsIterator.next();
continue;
}
// Stop processing, if the next character lies behind the path.
if (textPathOffset > m_textPathLength)
break;
FloatPoint point;
bool ok = m_textPathCalculator->pointAndNormalAtLength(textPathOffset, point, angle);
ASSERT_UNUSED(ok, ok);
x = point.x();
y = point.y();
// For vertical text on path, the actual angle has to be rotated 90 degrees anti-clockwise, not the orientation angle!
if (m_isVerticalText)
angle -= 90;
} else {
// Apply all previously calculated shift values.
if (m_isVerticalText)
x += baselineShift;
else
y -= baselineShift;
x += m_dx;
y += m_dy;
}
// Determine whether we have to start a new fragment.
bool shouldStartNewFragment = m_dx || m_dy || m_isVerticalText || m_inPathLayout || angle || angle != lastAngle
|| applySpacingToNextCharacter || m_textLengthSpacingInEffect;
// If we already started a fragment, close it now.
if (didStartTextFragment && shouldStartNewFragment) {
applySpacingToNextCharacter = false;
recordTextFragment(textBox);
}
// Eventually start a new fragment, if not yet done.
if (!didStartTextFragment || shouldStartNewFragment) {
ASSERT(!m_currentTextFragment.characterOffset);
ASSERT(!m_currentTextFragment.length);
didStartTextFragment = true;
m_currentTextFragment.characterOffset = m_visualMetricsIterator.characterOffset();
m_currentTextFragment.metricsListOffset = m_visualMetricsIterator.metricsListOffset();
m_currentTextFragment.x = x;
m_currentTextFragment.y = y;
// Build fragment transformation.
if (angle)
m_currentTextFragment.transform.rotate(angle);
if (textPathShiftX || textPathShiftY)
m_currentTextFragment.transform.translate(textPathShiftX, textPathShiftY);
// In vertical text, always rotate by 90 degrees regardless of fontOrientation.
// Shaping engine takes care of the necessary orientation.
if (m_isVerticalText)
m_currentTextFragment.transform.rotate(90);
m_currentTextFragment.isTextOnPath = m_inPathLayout && m_textPathScaling != 1;
if (m_currentTextFragment.isTextOnPath) {
if (m_isVerticalText)
m_currentTextFragment.lengthAdjustTransform.scaleNonUniform(1, m_textPathScaling);
else
m_currentTextFragment.lengthAdjustTransform.scaleNonUniform(m_textPathScaling, 1);
}
}
// Update current text position, after processing of the current character finished.
if (m_inPathLayout) {
updateCurrentTextPosition(x, y, glyphAdvance);
} else {
// Apply CSS 'kerning', 'letter-spacing' and 'word-spacing' to next character, if needed.
if (spacing)
applySpacingToNextCharacter = true;
float xNew = x - m_dx;
float yNew = y - m_dy;
if (m_isVerticalText)
xNew -= baselineShift;
else
yNew += baselineShift;
updateCurrentTextPosition(xNew, yNew, glyphAdvance + spacing);
}
advanceToNextLogicalCharacter(logicalMetrics);
m_visualMetricsIterator.next();
lastAngle = angle;
}
if (!didStartTextFragment)
return;
// Close last open fragment, if needed.
recordTextFragment(textBox);
}
void SVGTextChunkBuilder::handleTextChunk(BoxListConstIterator boxStart,
BoxListConstIterator boxEnd) {
ASSERT(*boxStart);
const LineLayoutSVGInlineText textLineLayout =
LineLayoutSVGInlineText((*boxStart)->getLineLayoutItem());
const ComputedStyle& style = textLineLayout.styleRef();
// Handle 'lengthAdjust' property.
float desiredTextLength = 0;
SVGLengthAdjustType lengthAdjust = SVGLengthAdjustUnknown;
if (SVGTextContentElement* textContentElement =
SVGTextContentElement::elementFromLineLayoutItem(
textLineLayout.parent())) {
lengthAdjust =
textContentElement->lengthAdjust()->currentValue()->enumValue();
SVGLengthContext lengthContext(textContentElement);
if (textContentElement->textLengthIsSpecifiedByUser())
desiredTextLength =
textContentElement->textLength()->currentValue()->value(
lengthContext);
else
desiredTextLength = 0;
}
bool processTextLength = desiredTextLength > 0;
bool processTextAnchor = needsTextAnchorAdjustment(style);
if (!processTextAnchor && !processTextLength)
return;
bool isVerticalText = !style.isHorizontalWritingMode();
// Calculate absolute length of whole text chunk (starting from text box
// 'start', spanning 'length' text boxes).
ChunkLengthAccumulator lengthAccumulator(isVerticalText);
lengthAccumulator.processRange(boxStart, boxEnd);
if (processTextLength) {
float chunkLength = lengthAccumulator.length();
if (lengthAdjust == SVGLengthAdjustSpacing) {
float textLengthShift =
(desiredTextLength - chunkLength) / lengthAccumulator.numCharacters();
unsigned atCharacter = 0;
for (auto boxIter = boxStart; boxIter != boxEnd; ++boxIter) {
Vector<SVGTextFragment>& fragments = (*boxIter)->textFragments();
if (fragments.isEmpty())
continue;
processTextLengthSpacingCorrection(isVerticalText, textLengthShift,
fragments, atCharacter);
}
// Fragments have been adjusted, we have to recalculate the chunk
// length, to be able to apply the text-anchor shift.
if (processTextAnchor) {
lengthAccumulator.reset();
lengthAccumulator.processRange(boxStart, boxEnd);
}
} else {
ASSERT(lengthAdjust == SVGLengthAdjustSpacingAndGlyphs);
float textLengthScale = desiredTextLength / chunkLength;
float textLengthBias = 0;
bool foundFirstFragment = false;
for (auto boxIter = boxStart; boxIter != boxEnd; ++boxIter) {
SVGInlineTextBox* textBox = *boxIter;
Vector<SVGTextFragment>& fragments = textBox->textFragments();
if (fragments.isEmpty())
continue;
if (!foundFirstFragment) {
foundFirstFragment = true;
textLengthBias =
computeTextLengthBias(fragments.first(), textLengthScale);
}
applyTextLengthScaleAdjustment(textLengthScale, textLengthBias,
fragments);
}
}
}
if (!processTextAnchor)
return;
float textAnchorShift =
calculateTextAnchorShift(style, lengthAccumulator.length());
for (auto boxIter = boxStart; boxIter != boxEnd; ++boxIter) {
Vector<SVGTextFragment>& fragments = (*boxIter)->textFragments();
if (fragments.isEmpty())
continue;
processTextAnchorCorrection(isVerticalText, textAnchorShift, fragments);
}
}