void SliderThumbElement::handleTouchEvent(TouchEvent* touchEvent)
{
HTMLInputElement* input = hostInput();
ASSERT(input);
if (input->isReadOnly() || input->isDisabledFormControl()) {
clearExclusiveTouchIdentifier();
stopDragging();
touchEvent->setDefaultHandled();
HTMLDivElement::defaultEventHandler(touchEvent);
return;
}
const AtomicString& eventType = touchEvent->type();
if (eventType == eventNames().touchstartEvent) {
handleTouchStart(touchEvent);
return;
}
if (eventType == eventNames().touchendEvent || eventType == eventNames().touchcancelEvent) {
handleTouchEndAndCancel(touchEvent);
return;
}
if (eventType == eventNames().touchmoveEvent) {
handleTouchMove(touchEvent);
return;
}
HTMLDivElement::defaultEventHandler(touchEvent);
}
void SliderThumbElement::unregisterForTouchEvents()
{
if (!m_isRegisteredAsTouchEventListener)
return;
clearExclusiveTouchIdentifier();
stopDragging();
document().removeTouchEventListener(this);
m_isRegisteredAsTouchEventListener = false;
}
void SliderThumbElement::handleTouchEndAndCancel(TouchEvent* touchEvent)
{
unsigned identifier = exclusiveTouchIdentifier();
if (identifier == NoIdentifier)
return;
// If our exclusive touch still exists, it was not the touch
// that ended, so we should not stop dragging.
Touch* exclusiveTouch = findTouchWithIdentifier(touchEvent->targetTouches(), identifier);
if (exclusiveTouch)
return;
clearExclusiveTouchIdentifier();
stopDragging();
}
