Position HTMLTextFormControlElement::startOfSentence(const Position& position)
{
HTMLTextFormControlElement* textFormControl = enclosingTextFormControl(position);
ASSERT(textFormControl);
HTMLElement* innerEditor = textFormControl->innerEditorElement();
if (!innerEditor->childNodes()->length())
return startOfInnerText(textFormControl);
const Position innerPosition = position.anchorNode() == innerEditor ? innerNodePosition(position) : position;
const Position pivotPosition = previousIfPositionIsAfterLineBreak(innerPosition, innerEditor);
if (pivotPosition.isNull())
return startOfInnerText(textFormControl);
for (Node* node = pivotPosition.anchorNode(); node; node = NodeTraversal::previous(*node, innerEditor)) {
bool isPivotNode = (node == pivotPosition.anchorNode());
if (isHTMLBRElement(node) && (!isPivotNode || pivotPosition.isAfterAnchor()))
return Position(node, PositionAnchorType::AfterAnchor);
if (node->isTextNode()) {
Text* textNode = toText(node);
size_t lastLineBreak = textNode->data().substring(0, isPivotNode ? pivotPosition.offsetInContainerNode() : textNode->length()).reverseFind('\n');
if (lastLineBreak != kNotFound)
return Position(textNode, lastLineBreak + 1);
}
}
return startOfInnerText(textFormControl);
}
Position HTMLTextFormControlElement::endOfSentence(const Position& position)
{
HTMLTextFormControlElement* textFormControl = enclosingTextFormControl(position);
ASSERT(textFormControl);
HTMLElement* innerEditor = textFormControl->innerEditorElement();
if (innerEditor->childNodes()->length() == 0)
return startOfInnerText(textFormControl);
const Position pivotPosition = position.anchorNode() == innerEditor ? innerNodePosition(position) : position;
if (pivotPosition.isNull())
return startOfInnerText(textFormControl);
for (Node* node = pivotPosition.anchorNode(); node; node = NodeTraversal::next(*node, innerEditor)) {
bool isPivotNode = node == pivotPosition.anchorNode();
if (isHTMLBRElement(node))
return Position(node, PositionAnchorType::AfterAnchor);
if (node->isTextNode()) {
Text* textNode = toText(node);
size_t firstLineBreak = textNode->data().find('\n', isPivotNode ? pivotPosition.offsetInContainerNode() : 0);
if (firstLineBreak != kNotFound)
return Position(textNode, firstLineBreak + 1);
}
}
return endOfInnerText(textFormControl);
}
