void InputElement::handleBeforeTextInsertedEvent(InputElementData& data, Document* document, Event* event)
{
ASSERT(event->isBeforeTextInsertedEvent());
// Make sure that the text to be inserted will not violate the maxLength.
int oldLength = numGraphemeClusters(data.inputElement()->value().impl());
ASSERT(oldLength <= data.maxLength());
int selectionLength = numGraphemeClusters(plainText(document->frame()->selection()->selection().toNormalizedRange().get()).impl());
ASSERT(oldLength >= selectionLength);
int maxNewLength = data.maxLength() - (oldLength - selectionLength);
// Truncate the inserted text to avoid violating the maxLength and other constraints.
BeforeTextInsertedEvent* textEvent = static_cast<BeforeTextInsertedEvent*>(event);
textEvent->setText(constrainValue(data, textEvent->text(), maxNewLength));
}
void InputElement::handleBeforeTextInsertedEvent(InputElementData& data, InputElement* inputElement, Element* element, Event* event)
{
ASSERT(event->isBeforeTextInsertedEvent());
// Make sure that the text to be inserted will not violate the maxLength.
// We use RenderTextControlSingleLine::text() instead of InputElement::value()
// because they can be mismatched by sanitizeValue() in
// RenderTextControlSingleLine::subtreeHasChanged() in some cases.
unsigned oldLength = numGraphemeClusters(toRenderTextControlSingleLine(element->renderer())->text());
// selectionLength represents the selection length of this text field to be
// removed by this insertion.
// If the text field has no focus, we don't need to take account of the
// selection length. The selection is the source of text drag-and-drop in
// that case, and nothing in the text field will be removed.
unsigned selectionLength = element->focused() ? numGraphemeClusters(plainText(element->document()->frame()->selection()->selection().toNormalizedRange().get())) : 0;
ASSERT(oldLength >= selectionLength);
// Selected characters will be removed by the next text event.
unsigned baseLength = oldLength - selectionLength;
unsigned maxLength = static_cast<unsigned>(inputElement->supportsMaxLength() ? data.maxLength() : s_maximumLength); // maxLength() can never be negative.
unsigned appendableLength = maxLength > baseLength ? maxLength - baseLength : 0;
// Truncate the inserted text to avoid violating the maxLength and other constraints.
BeforeTextInsertedEvent* textEvent = static_cast<BeforeTextInsertedEvent*>(event);
#if ENABLE(WCSS)
RefPtr<Range> range = element->document()->frame()->selection()->selection().toNormalizedRange();
String candidateString = toRenderTextControlSingleLine(element->renderer())->text();
if (selectionLength)
candidateString.replace(range->startOffset(), range->endOffset(), textEvent->text());
else
candidateString.insert(textEvent->text(), range->startOffset());
if (!isConformToInputMask(inputElement->data(), candidateString)) {
textEvent->setText("");
return;
}
#endif
textEvent->setText(sanitizeUserInputValue(inputElement, textEvent->text(), appendableLength));
}
