WebTouchEventBuilder::WebTouchEventBuilder(const LayoutObject* layoutObject, const TouchEvent& event)
{
if (event.type() == EventTypeNames::touchstart)
type = TouchStart;
else if (event.type() == EventTypeNames::touchmove)
type = TouchMove;
else if (event.type() == EventTypeNames::touchend)
type = TouchEnd;
else if (event.type() == EventTypeNames::touchcancel)
type = TouchCancel;
else {
ASSERT_NOT_REACHED();
type = Undefined;
return;
}
timeStampSeconds = event.platformTimeStamp();
modifiers = event.modifiers();
cancelable = event.cancelable();
causesScrollingIfUncanceled = event.causesScrollingIfUncanceled();
// Currently touches[] is empty, add stationary points as-is.
for (unsigned i = 0; i < event.touches()->length() && i < static_cast<unsigned>(WebTouchEvent::touchesLengthCap); ++i) {
touches[i] = toWebTouchPoint(event.touches()->item(i), layoutObject, WebTouchPoint::StateStationary);
++touchesLength;
}
// If any existing points are also in the change list, we should update
// their state, otherwise just add the new points.
addTouchPointsUpdateStateIfNecessary(toWebTouchPointState(event.type()), event.changedTouches(), touches, &touchesLength, layoutObject);
}
static void addTouchPoints(const Widget* widget, const AtomicString& touchType, TouchList* touches, WebTouchPoint* touchPoints, unsigned* touchPointsLength, const WebCore::RenderObject* renderObject)
{
unsigned numberOfTouches = std::min(touches->length(), static_cast<unsigned>(WebTouchEvent::touchesLengthCap));
for (unsigned i = 0; i < numberOfTouches; ++i) {
const Touch* touch = touches->item(i);
WebTouchPoint point;
point.id = touch->identifier();
point.screenPosition = WebFloatPoint(touch->screenX(), touch->screenY());
point.position = convertAbsoluteLocationForRenderObject(touch->absoluteLocation(), *renderObject);
point.radiusX = touch->webkitRadiusX();
point.radiusY = touch->webkitRadiusY();
point.rotationAngle = touch->webkitRotationAngle();
point.force = touch->webkitForce();
point.state = toWebTouchPointState(touchType);
touchPoints[i] = point;
}
*touchPointsLength = numberOfTouches;
}