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 HTMLTextAreaElement::handleBeforeTextInsertedEvent(BeforeTextInsertedEvent* event) const
{
ASSERT(event);
ASSERT(layoutObject());
int signedMaxLength = maxLength();
if (signedMaxLength < 0)
return;
unsigned unsignedMaxLength = static_cast<unsigned>(signedMaxLength);
const String& currentValue = innerEditorValue();
unsigned currentLength = computeLengthForSubmission(currentValue);
if (currentLength + computeLengthForSubmission(event->text()) < unsignedMaxLength)
return;
// 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 = 0;
if (focused()) {
const EphemeralRange range = document().frame()->selection().selection().toNormalizedEphemeralRange();
selectionLength = computeLengthForSubmission(plainText(range));
}
ASSERT(currentLength >= selectionLength);
unsigned baseLength = currentLength - selectionLength;
unsigned appendableLength = unsignedMaxLength > baseLength ? unsignedMaxLength - baseLength : 0;
event->setText(sanitizeUserInputValue(event->text(), appendableLength));
}
String HTMLTextAreaElement::validationMessage() const
{
if (!willValidate())
return String();
if (customError())
return customValidationMessage();
if (valueMissing())
return locale().queryString(blink::WebLocalizedString::ValidationValueMissing);
if (tooLong())
return locale().validationMessageTooLongText(computeLengthForSubmission(value()), maxLength());
if (tooShort())
return locale().validationMessageTooShortText(computeLengthForSubmission(value()), minLength());
return String();
}
bool HTMLTextAreaElement::tooLong(const String& value, NeedsToCheckDirtyFlag check) const
{
// Return false for the default value or value set by script even if it is
// longer than maxLength.
if (check == CheckDirtyFlag && !m_wasModifiedByUser)
return false;
int max = maxLength();
if (max < 0)
return false;
return computeLengthForSubmission(value) > static_cast<unsigned>(max);
}
bool HTMLTextAreaElement::tooLong(const String* value, NeedsToCheckDirtyFlag check) const
{
// Return false for the default value or value set by script even if it is
// longer than maxLength.
if (check == CheckDirtyFlag && !lastChangeWasUserEdit())
return false;
int max = maxLength();
if (max < 0)
return false;
return computeLengthForSubmission(value ? *value : this->value()) > static_cast<unsigned>(max);
}
bool HTMLTextAreaElement::tooShort(const String* value, NeedsToCheckDirtyFlag check) const
{
// Return false for the default value or value set by script even if it is
// shorter than minLength.
if (check == CheckDirtyFlag && !lastChangeWasUserEdit())
return false;
int min = minLength();
if (min <= 0)
return false;
// An empty string is excluded from minlength check.
unsigned len = computeLengthForSubmission(value ? *value : this->value());
return len > 0 && len < static_cast<unsigned>(min);
}
bool HTMLTextAreaElement::tooLong(const String& value, NeedsToCheckDirtyFlag check) const
{
// Return false for the default value or value set by script even if it is
// longer than maxLength.
if (check == CheckDirtyFlag && !m_wasModifiedByUser)
return false;
int max = maxLength();
if (max < 0)
return false;
unsigned unsignedMax = static_cast<unsigned>(max);
unsigned numberOfLineBreaksInValue = numberOfLineBreaks(value);
return upperBoundForLengthForSubmission(value, numberOfLineBreaksInValue) > unsignedMax
&& computeLengthForSubmission(value, numberOfLineBreaksInValue) > unsignedMax;
}
String HTMLTextAreaElement::validationMessage() const
{
if (!willValidate())
return String();
if (customError())
return customValidationMessage();
if (valueMissing())
return validationMessageValueMissingText();
if (tooLong())
return validationMessageTooLongText(computeLengthForSubmission(value()), maxLength());
return String();
}
