void SVGRootInlineBox::layoutCharactersInTextBoxes(InlineFlowBox* start, SVGTextLayoutEngine& characterLayout)
{
for (InlineBox* child = start->firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox()) {
ASSERT(child->renderer().isSVGInlineText());
SVGInlineTextBox* textBox = toSVGInlineTextBox(child);
characterLayout.layoutInlineTextBox(textBox);
} else {
// Skip generated content.
Node* node = child->renderer().node();
if (!node)
continue;
ASSERT_WITH_SECURITY_IMPLICATION(child->isInlineFlowBox());
SVGInlineFlowBox* flowBox = toSVGInlineFlowBox(child);
bool isTextPath = node->hasTagName(SVGNames::textPathTag);
if (isTextPath) {
// Build text chunks for all <textPath> children, using the line layout algorithm.
// This is needeed as text-anchor is just an additional startOffset for text paths.
SVGTextLayoutEngine lineLayout(characterLayout.layoutAttributes());
layoutCharactersInTextBoxes(flowBox, lineLayout);
characterLayout.beginTextPathLayout(&child->renderer(), lineLayout);
}
layoutCharactersInTextBoxes(flowBox, characterLayout);
if (isTextPath)
characterLayout.endTextPathLayout();
}
}
}
void SVGRootInlineBox::computePerCharacterLayoutInformation()
{
RenderSVGText* textRoot = toRenderSVGText(&blockFlow());
ASSERT(textRoot);
Vector<SVGTextLayoutAttributes*>& layoutAttributes = textRoot->layoutAttributes();
if (layoutAttributes.isEmpty())
return;
if (textRoot->needsReordering())
reorderValueLists(layoutAttributes);
// Perform SVG text layout phase two (see SVGTextLayoutEngine for details).
SVGTextLayoutEngine characterLayout(layoutAttributes);
layoutCharactersInTextBoxes(this, characterLayout);
// Perform SVG text layout phase three (see SVGTextChunkBuilder for details).
characterLayout.finishLayout();
// Perform SVG text layout phase four
// Position & resize all SVGInlineText/FlowBoxes in the inline box tree, resize the root box as well as the RenderSVGText parent block.
FloatRect childRect;
layoutChildBoxes(this, &childRect);
layoutRootBox(childRect);
}
void SVGTextLayoutEngine::layoutCharactersInTextBoxes(InlineFlowBox* start)
{
bool textLengthSpacingInEffect = m_textLengthSpacingInEffect || definesTextLengthWithSpacing(start);
TemporaryChange<bool> textLengthSpacingScope(m_textLengthSpacingInEffect, textLengthSpacingInEffect);
for (InlineBox* child = start->firstChild(); child; child = child->nextOnLine()) {
if (child->isSVGInlineTextBox()) {
ASSERT(child->layoutObject().isSVGInlineText());
layoutInlineTextBox(toSVGInlineTextBox(child));
} else {
// Skip generated content.
Node* node = child->layoutObject().node();
if (!node)
continue;
SVGInlineFlowBox* flowBox = toSVGInlineFlowBox(child);
bool isTextPath = isSVGTextPathElement(*node);
if (isTextPath)
beginTextPathLayout(flowBox);
layoutCharactersInTextBoxes(flowBox);
if (isTextPath)
endTextPathLayout();
}
}
}
void SVGRootInlineBox::computePerCharacterLayoutInformation()
{
// Perform SVG text layout phase two (see SVGTextLayoutEngine for details).
SVGTextLayoutEngine characterLayout;
layoutCharactersInTextBoxes(this, characterLayout);
// Perform SVG text layout phase three (see SVGTextChunkBuilder for details).
characterLayout.finishLayout();
// Perform SVG text layout phase four
// Position & resize all SVGInlineText/FlowBoxes in the inline box tree, resize the root box as well as the RenderSVGText parent block.
layoutChildBoxes(this);
layoutRootBox();
}