static String atomizeIfAllWhitespace(const String& string, WhitespaceMode whitespaceMode)
{
// Strings composed entirely of whitespace are likely to be repeated.
// Turn them into AtomicString so we share a single string for each.
if (whitespaceMode == AllWhitespace || (whitespaceMode == WhitespaceUnknown && isAllWhitespace(string)))
return AtomicString(string).string();
return string;
}
void HTMLConstructionSite::flushPendingText()
{
if (m_pendingText.isEmpty())
return;
PendingText pendingText;
// Hold onto the current pending text on the stack so that queueTask doesn't recurse infinitely.
m_pendingText.swap(pendingText);
ASSERT(m_pendingText.isEmpty());
// Splitting text nodes into smaller chunks contradicts HTML5 spec, but is necessary
// for performance, see: https://bugs.webkit.org/show_bug.cgi?id=55898
unsigned lengthLimit = textLengthLimitForContainer(*pendingText.parent);
unsigned currentPosition = 0;
const StringBuilder& string = pendingText.stringBuilder;
while (currentPosition < string.length()) {
unsigned proposedBreakIndex = std::min(currentPosition + lengthLimit, string.length());
unsigned breakIndex = findBreakIndexBetween(string, currentPosition, proposedBreakIndex);
ASSERT(breakIndex <= string.length());
String substring = string.substring(currentPosition, breakIndex - currentPosition);
ASSERT(breakIndex > currentPosition);
ASSERT(breakIndex - currentPosition == substring.length());
currentPosition = breakIndex;
if (isAllWhitespace(substring)) {
// Ignore whitespace nodes not inside inside a <t>. If we're splitting
// a text node this isn't really a whitespace node and we can't ignore
// it either.
if (!m_openElements.preserveWhiteSpace() && string.length() == substring.length())
continue;
// Strings composed entirely of whitespace are likely to be repeated.
// Turn them into AtomicString so we share a single string for each.
substring = AtomicString(substring).string();
}
HTMLConstructionSiteTask task(HTMLConstructionSiteTask::InsertText);
task.parent = pendingText.parent;
task.child = Text::create(task.parent->document(), substring);
queueTask(task);
ASSERT(toText(task.child.get())->length() == substring.length());
}
}
