static void adjustRunOffsets(Vector<Run, 4>& lineRuns, ETextAlign textAlign, float lineWidth, float availableWidth)
{
float lineLeft = computeLineLeft(textAlign, availableWidth - lineWidth);
for (unsigned i = 0; i < lineRuns.size(); ++i) {
lineRuns[i].left = floor(lineLeft + lineRuns[i].left);
lineRuns[i].right = ceil(lineLeft + lineRuns[i].right);
}
}
static void closeLineEndingAndAdjustRuns(LineState& line, Layout::RunVector& runs, unsigned previousRunCount, unsigned& lineCount, const TextFragmentIterator& textFragmentIterator)
{
if (previousRunCount == runs.size())
return;
ASSERT(runs.size());
removeTrailingWhitespace(line, runs, textFragmentIterator);
if (!runs.size())
return;
// Adjust runs' position by taking line's alignment into account.
if (float lineLogicalLeft = computeLineLeft(textFragmentIterator.style().textAlign, line.availableWidth(), line.width(), line.logicalLeftOffset())) {
for (unsigned i = previousRunCount; i < runs.size(); ++i) {
runs[i].logicalLeft += lineLogicalLeft;
runs[i].logicalRight += lineLogicalLeft;
}
}
runs.last().isEndOfLine = true;
++lineCount;
}
void createTextRuns(Layout::RunVector& runs, unsigned& lineCount, RenderBlockFlow& flow, RenderText& textRenderer)
{
const Style style(flow.style());
const CharacterType* text = textRenderer.text()->characters<CharacterType>();
const unsigned textLength = textRenderer.textLength();
LayoutUnit borderAndPaddingBefore = flow.borderAndPaddingBefore();
LayoutUnit lineHeight = lineHeightFromFlow(flow);
LazyLineBreakIterator lineBreakIterator(textRenderer.text(), flow.style().locale());
unsigned lineEnd = 0;
while (lineEnd < textLength) {
if (style.collapseWhitespace)
lineEnd = skipWhitespaces(text, lineEnd, textLength, style.preserveNewline);
unsigned lineStart = lineEnd;
// LineWidth reads the current y position from the flow so keep it updated.
flow.setLogicalHeight(lineHeight * lineCount + borderAndPaddingBefore);
LineWidth lineWidth(flow, false, DoNotIndentText);
auto lineRuns = createLineRuns(lineStart, lineWidth, lineBreakIterator, style, text, textLength, textRenderer);
lineEnd = lineRuns.last().end;
if (lineStart == lineEnd)
continue;
lineRuns.last().isEndOfLine = true;
float lineLeft = computeLineLeft(style.textAlign, lineWidth);
adjustRunOffsets(lineRuns, lineLeft);
for (unsigned i = 0; i < lineRuns.size(); ++i)
runs.append(lineRuns[i]);
++lineCount;
}
}