void HTMLTextAreaElement::handleBeforeTextInsertedEvent(BeforeTextInsertedEvent* event) const
{
ASSERT(event);
ASSERT(renderer());
int signedMaxLength = maxLength();
if (signedMaxLength < 0)
return;
unsigned unsignedMaxLength = static_cast<unsigned>(signedMaxLength);
const String& currentValue = innerTextValue();
unsigned numberOfLineBreaksInCurrentValue = numberOfLineBreaks(currentValue);
if (upperBoundForLengthForSubmission(currentValue, numberOfLineBreaksInCurrentValue)
+ upperBoundForLengthForSubmission(event->text(), numberOfLineBreaks(event->text())) < unsignedMaxLength)
return;
unsigned currentLength = computeLengthForSubmission(currentValue, numberOfLineBreaksInCurrentValue);
// 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 = focused() ? computeLengthForSubmission(plainText(document().frame()->selection().selection().toNormalizedRange().get())) : 0;
ASSERT(currentLength >= selectionLength);
unsigned baseLength = currentLength - selectionLength;
unsigned appendableLength = unsignedMaxLength > baseLength ? unsignedMaxLength - baseLength : 0;
event->setText(sanitizeUserInputValue(event->text(), appendableLength));
}
void HTMLTextFormControlElement::setRangeText(const String& replacement, unsigned start, unsigned end, const String& selectionMode, ExceptionState& exceptionState)
{
if (start > end) {
exceptionState.throwDOMException(IndexSizeError, "The provided start value (" + String::number(start) + ") is larger than the provided end value (" + String::number(end) + ").");
return;
}
if (hasAuthorShadowRoot())
return;
String text = innerTextValue();
unsigned textLength = text.length();
unsigned replacementLength = replacement.length();
unsigned newSelectionStart = selectionStart();
unsigned newSelectionEnd = selectionEnd();
start = std::min(start, textLength);
end = std::min(end, textLength);
if (start < end)
text.replace(start, end - start, replacement);
else
text.insert(replacement, start);
setInnerTextValue(text);
// FIXME: What should happen to the value (as in value()) if there's no renderer?
if (!renderer())
return;
subtreeHasChanged();
if (equalIgnoringCase(selectionMode, "select")) {
newSelectionStart = start;
newSelectionEnd = start + replacementLength;
} else if (equalIgnoringCase(selectionMode, "start"))
newSelectionStart = newSelectionEnd = start;
else if (equalIgnoringCase(selectionMode, "end"))
newSelectionStart = newSelectionEnd = start + replacementLength;
else {
// Default is "preserve".
long delta = replacementLength - (end - start);
if (newSelectionStart > end)
newSelectionStart += delta;
else if (newSelectionStart > start)
newSelectionStart = start;
if (newSelectionEnd > end)
newSelectionEnd += delta;
else if (newSelectionEnd > start)
newSelectionEnd = start + replacementLength;
}
setSelectionRange(newSelectionStart, newSelectionEnd, SelectionHasNoDirection);
}
void HTMLTextFormControlElement::setRangeText(const String& replacement, unsigned start, unsigned end, const String& selectionMode, ExceptionCode& ec)
{
if (start > end) {
ec = INDEX_SIZE_ERR;
return;
}
String text = innerTextValue();
unsigned textLength = text.length();
unsigned replacementLength = replacement.length();
unsigned newSelectionStart = selectionStart();
unsigned newSelectionEnd = selectionEnd();
start = std::min(start, textLength);
end = std::min(end, textLength);
if (start < end)
text.replace(start, end - start, replacement);
else
text.insert(replacement, start);
setInnerTextValue(text);
// FIXME: What should happen to the value (as in value()) if there's no renderer?
if (!renderer())
return;
subtreeHasChanged();
if (equalIgnoringCase(selectionMode, "select")) {
newSelectionStart = start;
newSelectionEnd = start + replacementLength;
} else if (equalIgnoringCase(selectionMode, "start"))
newSelectionStart = newSelectionEnd = start;
else if (equalIgnoringCase(selectionMode, "end"))
newSelectionStart = newSelectionEnd = start + replacementLength;
else {
// Default is "preserve".
long delta = replacementLength - (end - start);
if (newSelectionStart > end)
newSelectionStart += delta;
else if (newSelectionStart > start)
newSelectionStart = start;
if (newSelectionEnd > end)
newSelectionEnd += delta;
else if (newSelectionEnd > start)
newSelectionEnd = start + replacementLength;
}
setSelectionRange(newSelectionStart, newSelectionEnd, SelectionHasNoDirection);
}
void HTMLTextAreaElement::updateValue() const
{
if (formControlValueMatchesRenderer())
return;
ASSERT(renderer());
m_value = innerTextValue();
const_cast<HTMLTextAreaElement*>(this)->setFormControlValueMatchesRenderer(true);
m_isDirty = true;
m_wasModifiedByUser = true;
const_cast<HTMLTextAreaElement*>(this)->updatePlaceholderVisibility(false);
}
void HTMLTextFormControlElement::setInnerTextValue(const String& value)
{
ASSERT(!hasAuthorShadowRoot());
if (!isTextFormControl() || hasAuthorShadowRoot())
return;
bool textIsChanged = value != innerTextValue();
if (textIsChanged || !innerTextElement()->hasChildren()) {
if (textIsChanged && renderer()) {
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->postNotification(this, AXObjectCache::AXValueChanged, false);
}
innerTextElement()->setInnerText(value, ASSERT_NO_EXCEPTION);
if (value.endsWith('\n') || value.endsWith('\r'))
innerTextElement()->appendChild(HTMLBRElement::create(document()));
}
}
void HTMLTextFormControlElement::setInnerTextValue(const String& value)
{
if (!isTextFormControl())
return;
bool textIsChanged = value != innerTextValue();
if (textIsChanged || !innerTextElement()->hasChildNodes()) {
if (textIsChanged && renderer()) {
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->postNotification(this, AXObjectCache::AXValueChanged, TargetObservableParent);
}
innerTextElement()->setInnerText(value, ASSERT_NO_EXCEPTION);
if (value.endsWith('\n') || value.endsWith('\r'))
innerTextElement()->appendChild(HTMLBRElement::create(document()), ASSERT_NO_EXCEPTION);
}
setFormControlValueMatchesRenderer(true);
}
void HTMLTextFormControlElement::setInnerTextValue(const String& value)
{
if (!isTextFormControl())
return;
bool textIsChanged = value != innerTextValue();
if (textIsChanged || !innerTextElement()->hasChildNodes()) {
if (textIsChanged && document() && renderer() && AXObjectCache::accessibilityEnabled())
document()->axObjectCache()->postNotification(this, AXObjectCache::AXValueChanged, false);
ExceptionCode ec = 0;
innerTextElement()->setInnerText(value, ec);
ASSERT(!ec);
if (value.endsWith('\n') || value.endsWith('\r')) {
innerTextElement()->appendChild(HTMLBRElement::create(document()), ec);
ASSERT(!ec);
}
}
setFormControlValueMatchesRenderer(true);
}
unsigned HTMLTextFormControlElement::indexForPosition(const Position& passedPosition) const
{
TextControlInnerTextElement* innerText = innerTextElement();
if (!innerText || !innerText->contains(passedPosition.anchorNode()) || passedPosition.isNull())
return 0;
if (positionBeforeNode(innerText) == passedPosition)
return 0;
unsigned index = 0;
Node* startNode = passedPosition.computeNodeBeforePosition();
if (!startNode)
startNode = passedPosition.containerNode();
ASSERT(startNode);
ASSERT(innerText->contains(startNode));
for (Node* node = startNode; node; node = NodeTraversal::previous(*node, innerText)) {
if (is<Text>(*node)) {
unsigned length = downcast<Text>(*node).length();
if (node == passedPosition.containerNode())
index += std::min<unsigned>(length, passedPosition.offsetInContainerNode());
else
index += length;
} else if (is<HTMLBRElement>(*node))
++index;
}
unsigned length = innerTextValue().length();
index = std::min(index, length); // FIXME: We shouldn't have to call innerTextValue() just to ignore the last LF. See finishText.
#ifndef ASSERT_DISABLED
VisiblePosition visiblePosition = passedPosition;
unsigned indexComputedByVisiblePosition = 0;
if (visiblePosition.isNotNull())
indexComputedByVisiblePosition = WebCore::indexForVisiblePosition(innerText, visiblePosition, false /* forSelectionPreservation */);
ASSERT(index == indexComputedByVisiblePosition);
#endif
return index;
}