void InputElement::updateValueIfNeeded(InputElementData& data)
{
String oldValue = data.value();
String newValue = data.inputElement()->constrainValue(oldValue);
if (newValue != oldValue)
data.inputElement()->setValue(newValue);
}
void InputElement::dispatchFocusEvent(InputElementData& data, Document* document)
{
if (!data.inputElement()->isTextField())
return;
updatePlaceholderVisibility(data, document);
if (data.inputElement()->isPasswordField() && document->frame())
document->setUseSecureKeyboardEntryWhenActive(true);
}
void InputElement::updateFocusAppearance(InputElementData& data, Document* document, bool restorePreviousSelection)
{
ASSERT(data.inputElement()->isTextField());
if (!restorePreviousSelection || data.cachedSelectionStart() == -1)
data.inputElement()->select();
else
// Restore the cached selection.
updateSelectionRange(data, data.cachedSelectionStart(), data.cachedSelectionEnd());
if (document && document->frame())
document->frame()->revealSelection();
}
void InputElement::updatePlaceholderVisibility(InputElementData& data, Document* document, bool placeholderValueChanged)
{
ASSERT(data.inputElement()->isTextField());
bool oldPlaceholderShouldBeVisible = data.placeholderShouldBeVisible();
Element* element = data.element();
data.setPlaceholderShouldBeVisible(data.inputElement()->value().isEmpty()
&& document->focusedNode() != element
&& !data.inputElement()->placeholder().isEmpty());
if ((oldPlaceholderShouldBeVisible != data.placeholderShouldBeVisible() || placeholderValueChanged) && element->renderer())
static_cast<RenderTextControlSingleLine*>(element->renderer())->updatePlaceholderVisibility();
}
void InputElement::dispatchBlurEvent(InputElementData& data, Document* document)
{
if (!data.inputElement()->isTextField())
return;
Frame* frame = document->frame();
if (!frame)
return;
updatePlaceholderVisibility(data, document);
if (data.inputElement()->isPasswordField())
document->setUseSecureKeyboardEntryWhenActive(false);
frame->textFieldDidEndEditing(data.element());
}
String InputElement::constrainValue(const InputElementData& data, const String& proposedValue, int maxLength)
{
String string = proposedValue;
if (!data.inputElement()->isTextField())
return string;
string.replace("\r\n", " ");
string.replace('\r', ' ');
string.replace('\n', ' ');
StringImpl* s = string.impl();
int newLength = numCharactersInGraphemeClusters(s, maxLength);
for (int i = 0; i < newLength; ++i) {
const UChar& current = (*s)[i];
if (current < ' ' && current != '\t') {
newLength = i;
break;
}
}
if (newLength < static_cast<int>(string.length()))
return string.left(newLength);
return string;
}
void InputElement::aboutToUnload(InputElementData& data, Document* document)
{
if (!data.inputElement()->isTextField() || !data.element()->focused() || !document->frame())
return;
document->frame()->textFieldDidEndEditing(data.element());
}
void InputElement::updateSelectionRange(InputElementData& data, int start, int end)
{
if (!data.inputElement()->isTextField())
return;
if (RenderTextControl* renderer = toRenderTextControl(data.element()->renderer()))
renderer->setSelectionRange(start, end);
}
void InputElement::setValueFromRenderer(InputElementData& data, Document* document, const String& value)
{
// Renderer and our event handler are responsible for constraining values.
ASSERT(value == data.inputElement()->constrainValue(value) || data.inputElement()->constrainValue(value).isEmpty());
if (data.inputElement()->isTextField())
updatePlaceholderVisibility(data, document);
// Workaround for bug where trailing \n is included in the result of textContent.
// The assert macro above may also be simplified to: value == constrainValue(value)
// http://bugs.webkit.org/show_bug.cgi?id=9661
if (value == "\n")
data.setValue("");
else
data.setValue(value);
Element* element = data.element();
element->setFormControlValueMatchesRenderer(true);
// Fire the "input" DOM event
element->dispatchEvent(eventNames().inputEvent, true, false);
notifyFormStateChanged(data, document);
}
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));
}