LayoutTextFragment* LayoutQuote::findFragmentChild() const
{
// We walk from the end of the child list because, if we've had a first-letter
// LayoutObject inserted then the remaining text will be at the end.
while (LayoutObject* child = lastChild()) {
if (child->isText() && toLayoutText(child)->isTextFragment())
return toLayoutTextFragment(child);
}
return nullptr;
}
// Passing both |textNode| and its layout object because repeated calls to
// |Node::layoutObject()| are discouraged.
static bool shouldUpdateLayoutByReattaching(const Text& textNode, LayoutText* textLayoutObject)
{
ASSERT(textNode.layoutObject() == textLayoutObject);
if (!textLayoutObject)
return true;
if (!textNode.textLayoutObjectIsNeeded(*textLayoutObject->style(), *textLayoutObject->parent()))
return true;
if (textLayoutObject->isTextFragment()) {
FirstLetterPseudoElement* pseudo = toLayoutTextFragment(textLayoutObject)->firstLetterPseudoElement();
if (pseudo && !FirstLetterPseudoElement::firstLetterTextLayoutObject(*pseudo))
return true;
}
return false;
}
LayoutText* SimplifiedBackwardsTextIteratorAlgorithm<Strategy>::handleFirstLetter(int& startOffset, int& offsetInNode)
{
LayoutText* layoutObject = toLayoutText(m_node->layoutObject());
startOffset = (m_node == m_startNode) ? m_startOffset : 0;
if (!layoutObject->isTextFragment()) {
offsetInNode = 0;
return layoutObject;
}
LayoutTextFragment* fragment = toLayoutTextFragment(layoutObject);
int offsetAfterFirstLetter = fragment->start();
if (startOffset >= offsetAfterFirstLetter) {
ASSERT(!m_shouldHandleFirstLetter);
offsetInNode = offsetAfterFirstLetter;
return layoutObject;
}
if (!m_shouldHandleFirstLetter && offsetAfterFirstLetter < m_offset) {
m_shouldHandleFirstLetter = true;
offsetInNode = offsetAfterFirstLetter;
return layoutObject;
}
m_shouldHandleFirstLetter = false;
offsetInNode = 0;
ASSERT(fragment->isRemainingTextLayoutObject());
ASSERT(fragment->firstLetterPseudoElement());
LayoutObject* pseudoElementLayoutObject = fragment->firstLetterPseudoElement()->layoutObject();
ASSERT(pseudoElementLayoutObject);
ASSERT(pseudoElementLayoutObject->slowFirstChild());
LayoutText* firstLetterLayoutObject = toLayoutText(pseudoElementLayoutObject->slowFirstChild());
m_offset = firstLetterLayoutObject->caretMaxOffset();
m_offset += collapsedSpaceLength(firstLetterLayoutObject, m_offset);
return firstLetterLayoutObject;
}