extractEvents: function extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
if (isStartish(topLevelType)) {
trackedTouchCount += 1;
} else if (isEndish(topLevelType)) {
if (trackedTouchCount >= 0) {
trackedTouchCount -= 1;
} else {
console.error('Ended a touch event which was not counted in `trackedTouchCount`.');
return null;
}
}
ResponderTouchHistoryStore.recordTouchTrack(topLevelType, nativeEvent);
var extracted = canTriggerTransfer(topLevelType, targetInst, nativeEvent) ? setResponderAndExtractTransfer(topLevelType, targetInst, nativeEvent, nativeEventTarget) : null;
var isResponderTouchStart = responderInst && isStartish(topLevelType);
var isResponderTouchMove = responderInst && isMoveish(topLevelType);
var isResponderTouchEnd = responderInst && isEndish(topLevelType);
var incrementalTouch = isResponderTouchStart ? eventTypes.responderStart : isResponderTouchMove ? eventTypes.responderMove : isResponderTouchEnd ? eventTypes.responderEnd : null;
if (incrementalTouch) {
var gesture = ResponderSyntheticEvent.getPooled(incrementalTouch, responderInst, nativeEvent, nativeEventTarget);
gesture.touchHistory = ResponderTouchHistoryStore.touchHistory;
EventPropagators.accumulateDirectDispatches(gesture);
extracted = accumulate(extracted, gesture);
}
var isResponderTerminate = responderInst && topLevelType === 'topTouchCancel';
var isResponderRelease = responderInst && !isResponderTerminate && isEndish(topLevelType) && noResponderTouches(nativeEvent);
var finalTouch = isResponderTerminate ? eventTypes.responderTerminate : isResponderRelease ? eventTypes.responderRelease : null;
if (finalTouch) {
var finalEvent = ResponderSyntheticEvent.getPooled(finalTouch, responderInst, nativeEvent, nativeEventTarget);
finalEvent.touchHistory = ResponderTouchHistoryStore.touchHistory;
EventPropagators.accumulateDirectDispatches(finalEvent);
extracted = accumulate(extracted, finalEvent);
changeResponder(null);
}
var numberActiveTouches = ResponderTouchHistoryStore.touchHistory.numberActiveTouches;
if (ResponderEventPlugin.GlobalInteractionHandler && numberActiveTouches !== previousActiveTouches) {
ResponderEventPlugin.GlobalInteractionHandler.onChange(numberActiveTouches);
}
previousActiveTouches = numberActiveTouches;
return extracted;
},
extractEvents: function(
topLevelType,
targetInst,
nativeEvent,
nativeEventTarget
) {
if (isStartish(topLevelType)) {
trackedTouchCount += 1;
} else if (isEndish(topLevelType)) {
trackedTouchCount -= 1;
invariant(
trackedTouchCount >= 0,
'Ended a touch event which was not counted in trackedTouchCount.'
);
}
ResponderTouchHistoryStore.recordTouchTrack(topLevelType, nativeEvent, nativeEventTarget);
var extracted = canTriggerTransfer(topLevelType, targetInst) ?
setResponderAndExtractTransfer(
topLevelType,
targetInst,
nativeEvent,
nativeEventTarget) :
null;
// Responder may or may not have transfered on a new touch start/move.
// Regardless, whoever is the responder after any potential transfer, we
// direct all touch start/move/ends to them in the form of
// `onResponderMove/Start/End`. These will be called for *every* additional
// finger that move/start/end, dispatched directly to whoever is the
// current responder at that moment, until the responder is "released".
//
// These multiple individual change touch events are are always bookended
// by `onResponderGrant`, and one of
// (`onResponderRelease/onResponderTerminate`).
var isResponderTouchStart = responderInst && isStartish(topLevelType);
var isResponderTouchMove = responderInst && isMoveish(topLevelType);
var isResponderTouchEnd = responderInst && isEndish(topLevelType);
var incrementalTouch =
isResponderTouchStart ? eventTypes.responderStart :
isResponderTouchMove ? eventTypes.responderMove :
isResponderTouchEnd ? eventTypes.responderEnd :
null;
if (incrementalTouch) {
var gesture =
ResponderSyntheticEvent.getPooled(
incrementalTouch,
responderInst,
nativeEvent,
nativeEventTarget
);
gesture.touchHistory = ResponderTouchHistoryStore.touchHistory;
EventPropagators.accumulateDirectDispatches(gesture);
extracted = accumulate(extracted, gesture);
}
var isResponderTerminate =
responderInst &&
topLevelType === EventConstants.topLevelTypes.topTouchCancel;
var isResponderRelease =
responderInst &&
!isResponderTerminate &&
isEndish(topLevelType) &&
noResponderTouches(nativeEvent);
var finalTouch =
isResponderTerminate ? eventTypes.responderTerminate :
isResponderRelease ? eventTypes.responderRelease :
null;
if (finalTouch) {
var finalEvent = ResponderSyntheticEvent.getPooled(
finalTouch, responderInst, nativeEvent, nativeEventTarget
);
finalEvent.touchHistory = ResponderTouchHistoryStore.touchHistory;
EventPropagators.accumulateDirectDispatches(finalEvent);
extracted = accumulate(extracted, finalEvent);
changeResponder(null);
}
var numberActiveTouches =
ResponderTouchHistoryStore.touchHistory.numberActiveTouches;
if (ResponderEventPlugin.GlobalInteractionHandler &&
numberActiveTouches !== previousActiveTouches) {
ResponderEventPlugin.GlobalInteractionHandler.onChange(
numberActiveTouches
);
}
previousActiveTouches = numberActiveTouches;
return extracted;
},