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);
}
static Position innerNodePosition(const Position& innerPosition)
{
ASSERT(!innerPosition.isBeforeAnchor());
ASSERT(!innerPosition.isAfterAnchor());
HTMLElement* element = toHTMLElement(innerPosition.anchorNode());
ASSERT(element);
NodeList* childNodes = element->childNodes();
if (!childNodes->length())
return Position(element, 0);
unsigned offset = 0;
if (innerPosition.isOffsetInAnchor())
offset = std::max(0, std::min(innerPosition.offsetInContainerNode(), static_cast<int>(childNodes->length())));
else if (innerPosition.isAfterChildren())
offset = childNodes->length();
if (offset == childNodes->length())
return Position(element->lastChild(), PositionAnchorType::AfterAnchor);
Node* node = childNodes->item(offset);
if (node->isTextNode())
return Position(toText(node), 0);
return Position(node, PositionAnchorType::BeforeAnchor);
}
static Position innerNodePosition(const Position& innerPosition)
{
ASSERT(innerPosition.anchorType() != Position::PositionIsBeforeAnchor);
ASSERT(innerPosition.anchorType() != Position::PositionIsAfterAnchor);
HTMLElement* element = toHTMLElement(innerPosition.anchorNode());
ASSERT(element);
RefPtrWillBeRawPtr<NodeList> childNodes = element->childNodes();
if (!childNodes->length())
return Position(element, 0, Position::PositionIsOffsetInAnchor);
unsigned offset = 0;
switch (innerPosition.anchorType()) {
case Position::PositionIsOffsetInAnchor:
offset = std::max(0, std::min(innerPosition.offsetInContainerNode(), static_cast<int>(childNodes->length())));
break;
case Position::PositionIsAfterChildren:
offset = childNodes->length();
break;
default:
break;
}
if (offset == childNodes->length())
return Position(element->lastChild(), Position::PositionIsAfterAnchor);
Node* node = childNodes->item(offset);
if (node->isTextNode())
return Position(toText(node), 0);
return Position(node, Position::PositionIsBeforeAnchor);
}
static Position endOfInnerText(const HTMLTextFormControlElement* textFormControl)
{
HTMLElement* innerEditor = textFormControl->innerEditorElement();
return Position(innerEditor, innerEditor->childNodes()->length());
}
