extractEvents: function(
topLevelType,
topLevelTarget,
topLevelTargetID,
nativeEvent) {
if (!isStartish(topLevelType) && !isEndish(topLevelType)) {
return null;
}
var event = null;
var distance = getDistance(startCoords, nativeEvent);
if (isEndish(topLevelType) && distance < tapMoveThreshold) {
event = SyntheticUIEvent.getPooled(
eventTypes.touchTap,
topLevelTargetID,
nativeEvent
);
}
if (isStartish(topLevelType)) {
startCoords.x = getAxisCoordOfEvent(Axis.x, nativeEvent);
startCoords.y = getAxisCoordOfEvent(Axis.y, nativeEvent);
} else if (isEndish(topLevelType)) {
startCoords.x = 0;
startCoords.y = 0;
}
EventPropagators.accumulateTwoPhaseDispatches(event);
return event;
}
extractEvents: function(
topLevelType: mixed,
targetInst: mixed,
nativeEvent: _Touch,
nativeEventTarget: EventTarget,
) {
if (!isStartish(topLevelType) && !isEndish(topLevelType)) {
return null;
}
// on ios, there is a delay after touch event and synthetic
// mouse events, so that user can perform double tap
// solution: ignore mouse events following touchevent within small timeframe
if (touchEvents.indexOf(topLevelType) !== -1) {
usedTouch = true;
usedTouchTime = Date.now();
} else {
if (usedTouch && Date.now() - usedTouchTime < TOUCH_DELAY) {
return null;
}
}
var event = null;
var distance = getDistance(startCoords, nativeEvent);
if (isEndish(topLevelType) && distance < tapMoveThreshold) {
event = SyntheticUIEvent.getPooled(
eventTypes.touchTap,
targetInst,
nativeEvent,
nativeEventTarget,
);
}
if (isStartish(topLevelType)) {
startCoords.x = getAxisCoordOfEvent(Axis.x, nativeEvent);
startCoords.y = getAxisCoordOfEvent(Axis.y, nativeEvent);
} else if (isEndish(topLevelType)) {
startCoords.x = 0;
startCoords.y = 0;
}
EventPropagators.accumulateTwoPhaseDispatches(event);
return event;
},