static inline void reverseInlineBoxRangeAndValueListsIfNeeded(void* userData, Vector<InlineBox*>::iterator first, Vector<InlineBox*>::iterator last)
{
ASSERT(userData);
Vector<SVGTextLayoutAttributes*>& attributes = *reinterpret_cast<Vector<SVGTextLayoutAttributes*>*>(userData);
// This is a copy of std::reverse(first, last). It additionally assures that the metrics map within the renderers belonging to the InlineBoxes are reordered as well.
while (true) {
if (first == last || first == --last)
return;
if (!(*last)->isSVGInlineTextBox() || !(*first)->isSVGInlineTextBox()) {
InlineBox* temp = *first;
*first = *last;
*last = temp;
++first;
continue;
}
SVGInlineTextBox* firstTextBox = toSVGInlineTextBox(*first);
SVGInlineTextBox* lastTextBox = toSVGInlineTextBox(*last);
// Reordering is only necessary for BiDi text that is _absolutely_ positioned.
if (firstTextBox->len() == 1 && firstTextBox->len() == lastTextBox->len()) {
RenderSVGInlineText* firstContext = toRenderSVGInlineText(firstTextBox->textRenderer());
RenderSVGInlineText* lastContext = toRenderSVGInlineText(lastTextBox->textRenderer());
SVGTextLayoutAttributes* firstAttributes = 0;
SVGTextLayoutAttributes* lastAttributes = 0;
findFirstAndLastAttributesInVector(attributes, firstContext, lastContext, firstAttributes, lastAttributes);
swapItemsInLayoutAttributes(firstAttributes, lastAttributes, firstTextBox->start(), lastTextBox->start());
}
InlineBox* temp = *first;
*first = *last;
*last = temp;
++first;
}
}
static inline void dumpTextBoxes(Vector<SVGInlineTextBox*>& boxes)
{
unsigned boxCount = boxes.size();
fprintf(stderr, "Dumping all text fragments in text sub tree, %i boxes\n", boxCount);
for (unsigned boxPosition = 0; boxPosition < boxCount; ++boxPosition) {
SVGInlineTextBox* textBox = boxes.at(boxPosition);
Vector<SVGTextFragment>& fragments = textBox->textFragments();
fprintf(stderr, "-> Box %i: Dumping text fragments for SVGInlineTextBox, textBox=%p, textRenderer=%p\n", boxPosition, textBox, textBox->textRenderer());
fprintf(stderr, " textBox properties, start=%i, len=%i, box direction=%i\n", textBox->start(), textBox->len(), textBox->direction());
fprintf(stderr, " textRenderer properties, textLength=%i\n", textBox->textRenderer()->textLength());
const UChar* characters = textBox->textRenderer()->characters();
unsigned fragmentCount = fragments.size();
for (unsigned i = 0; i < fragmentCount; ++i) {
SVGTextFragment& fragment = fragments.at(i);
String fragmentString(characters + fragment.characterOffset, fragment.length);
fprintf(stderr, " -> Fragment %i, x=%lf, y=%lf, width=%lf, height=%lf, characterOffset=%i, length=%i, characters='%s'\n"
, i, fragment.x, fragment.y, fragment.width, fragment.height, fragment.characterOffset, fragment.length, fragmentString.utf8().data());
}
}
}
void SVGTextChunkBuilder::addTextChunk(Vector<SVGInlineTextBox*>& lineLayoutBoxes, unsigned boxStart, unsigned boxCount)
{
SVGInlineTextBox* textBox = lineLayoutBoxes[boxStart];
ASSERT(textBox);
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(textBox->textRenderer());
ASSERT(textRenderer);
const RenderStyle* style = textRenderer->style();
ASSERT(style);
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
// Build chunk style flags.
unsigned chunkStyle = SVGTextChunk::DefaultStyle;
// Handle 'direction' property.
if (!style->isLeftToRightDirection())
chunkStyle |= SVGTextChunk::RightToLeftText;
// Handle 'writing-mode' property.
if (svgStyle->isVerticalWritingMode())
chunkStyle |= SVGTextChunk::VerticalText;
// Handle 'text-anchor' property.
switch (svgStyle->textAnchor()) {
case TA_START:
break;
case TA_MIDDLE:
chunkStyle |= SVGTextChunk::MiddleAnchor;
break;
case TA_END:
chunkStyle |= SVGTextChunk::EndAnchor;
break;
};
// Handle 'lengthAdjust' property.
float desiredTextLength = 0;
if (SVGTextContentElement* textContentElement = SVGTextContentElement::elementFromRenderer(textRenderer->parent())) {
desiredTextLength = textContentElement->specifiedTextLength().value(textContentElement);
switch (textContentElement->lengthAdjust()) {
case SVGTextContentElement::LENGTHADJUST_UNKNOWN:
break;
case SVGTextContentElement::LENGTHADJUST_SPACING:
chunkStyle |= SVGTextChunk::LengthAdjustSpacing;
break;
case SVGTextContentElement::LENGTHADJUST_SPACINGANDGLYPHS:
chunkStyle |= SVGTextChunk::LengthAdjustSpacingAndGlyphs;
break;
};
}
SVGTextChunk chunk(chunkStyle, desiredTextLength);
Vector<SVGInlineTextBox*>& boxes = chunk.boxes();
for (unsigned i = boxStart; i < boxStart + boxCount; ++i)
boxes.append(lineLayoutBoxes[i]);
m_textChunks.append(chunk);
}
