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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*/
'use strict';
var _prodInvariant = require('./reactProdInvariant');
var ReactErrorUtils = require('./ReactErrorUtils');
var invariant = require('fbjs/lib/invariant');
var warning = require('fbjs/lib/warning');
/**
* Injected dependencies:
*/
/**
* - `ComponentTree`: [required] Module that can convert between React instances
* and actual node references.
*/
var ComponentTree;
var TreeTraversal;
var injection = {
injectComponentTree: function (Injected) {
ComponentTree = Injected;
if (process.env.NODE_ENV !== 'production') {
process.env.NODE_ENV !== 'production' ? warning(Injected && Injected.getNodeFromInstance && Injected.getInstanceFromNode, 'EventPluginUtils.injection.injectComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.') : void 0;
}
},
injectTreeTraversal: function (Injected) {
TreeTraversal = Injected;
if (process.env.NODE_ENV !== 'production') {
process.env.NODE_ENV !== 'production' ? warning(Injected && Injected.isAncestor && Injected.getLowestCommonAncestor, 'EventPluginUtils.injection.injectTreeTraversal(...): Injected ' + 'module is missing isAncestor or getLowestCommonAncestor.') : void 0;
}
}
};
function isEndish(topLevelType) {
return topLevelType === 'topMouseUp' || topLevelType === 'topTouchEnd' || topLevelType === 'topTouchCancel';
}
function isMoveish(topLevelType) {
return topLevelType === 'topMouseMove' || topLevelType === 'topTouchMove';
}
function isStartish(topLevelType) {
return topLevelType === 'topMouseDown' || topLevelType === 'topTouchStart';
}
var validateEventDispatches;
if (process.env.NODE_ENV !== 'production') {
validateEventDispatches = function (event) {
var dispatchListeners = event._dispatchListeners;
var dispatchInstances = event._dispatchInstances;
var listenersIsArr = Array.isArray(dispatchListeners);
var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;
var instancesIsArr = Array.isArray(dispatchInstances);
var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;
process.env.NODE_ENV !== 'production' ? warning(instancesIsArr === listenersIsArr && instancesLen === listenersLen, 'EventPluginUtils: Invalid `event`.') : void 0;
};
}
/**
* Dispatch the event to the listener.
* @param {SyntheticEvent} event SyntheticEvent to handle
* @param {boolean} simulated If the event is simulated (changes exn behavior)
* @param {function} listener Application-level callback
* @param {*} inst Internal component instance
*/
function executeDispatch(event, simulated, listener, inst) {
var type = event.type || 'unknown-event';
event.currentTarget = EventPluginUtils.getNodeFromInstance(inst);
if (simulated) {
ReactErrorUtils.invokeGuardedCallbackWithCatch(type, listener, event);
} else {
ReactErrorUtils.invokeGuardedCallback(type, listener, event);
}
event.currentTarget = null;
}
/**
* Standard/simple iteration through an event's collected dispatches.
*/
function executeDispatchesInOrder(event, simulated) {
var dispatchListeners = event._dispatchListeners;
var dispatchInstances = event._dispatchInstances;
if (process.env.NODE_ENV !== 'production') {
validateEventDispatches(event);
}
if (Array.isArray(dispatchListeners)) {
for (var i = 0; i < dispatchListeners.length; i++) {
if (event.isPropagationStopped()) {
break;
}
// Listeners and Instances are two parallel arrays that are always in sync.
executeDispatch(event, simulated, dispatchListeners[i], dispatchInstances[i]);
}
} else if (dispatchListeners) {
executeDispatch(event, simulated, dispatchListeners, dispatchInstances);
}
event._dispatchListeners = null;
event._dispatchInstances = null;
}
/**
* Standard/simple iteration through an event's collected dispatches, but stops
* at the first dispatch execution returning true, and returns that id.
*
* @return {?string} id of the first dispatch execution who's listener returns
* true, or null if no listener returned true.
*/
function executeDispatchesInOrderStopAtTrueImpl(event) {
var dispatchListeners = event._dispatchListeners;
var dispatchInstances = event._dispatchInstances;
if (process.env.NODE_ENV !== 'production') {
validateEventDispatches(event);
}
if (Array.isArray(dispatchListeners)) {
for (var i = 0; i < dispatchListeners.length; i++) {
if (event.isPropagationStopped()) {
break;
}
// Listeners and Instances are two parallel arrays that are always in sync.
if (dispatchListeners[i](event, dispatchInstances[i])) {
return dispatchInstances[i];
}
}
} else if (dispatchListeners) {
if (dispatchListeners(event, dispatchInstances)) {
return dispatchInstances;
}
}
return null;
}
/**
* @see executeDispatchesInOrderStopAtTrueImpl
*/
function executeDispatchesInOrderStopAtTrue(event) {
var ret = executeDispatchesInOrderStopAtTrueImpl(event);
event._dispatchInstances = null;
event._dispatchListeners = null;
return ret;
}
/**
* Execution of a "direct" dispatch - there must be at most one dispatch
* accumulated on the event or it is considered an error. It doesn't really make
* sense for an event with multiple dispatches (bubbled) to keep track of the
* return values at each dispatch execution, but it does tend to make sense when
* dealing with "direct" dispatches.
*
* @return {*} The return value of executing the single dispatch.
*/
function executeDirectDispatch(event) {
if (process.env.NODE_ENV !== 'production') {
validateEventDispatches(event);
}
var dispatchListener = event._dispatchListeners;
var dispatchInstance = event._dispatchInstances;
!!Array.isArray(dispatchListener) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'executeDirectDispatch(...): Invalid `event`.') : _prodInvariant('103') : void 0;
event.currentTarget = dispatchListener ? EventPluginUtils.getNodeFromInstance(dispatchInstance) : null;
var res = dispatchListener ? dispatchListener(event) : null;
event.currentTarget = null;
event._dispatchListeners = null;
event._dispatchInstances = null;
return res;
}
/**
* @param {SyntheticEvent} event
* @return {boolean} True iff number of dispatches accumulated is greater than 0.
*/
function hasDispatches(event) {
return !!event._dispatchListeners;
}
/**
* General utilities that are useful in creating custom Event Plugins.
*/
var EventPluginUtils = {
isEndish: isEndish,
isMoveish: isMoveish,
isStartish: isStartish,
executeDirectDispatch: executeDirectDispatch,
executeDispatchesInOrder: executeDispatchesInOrder,
executeDispatchesInOrderStopAtTrue: executeDispatchesInOrderStopAtTrue,
hasDispatches: hasDispatches,
getInstanceFromNode: function (node) {
return ComponentTree.getInstanceFromNode(node);
},
getNodeFromInstance: function (node) {
return ComponentTree.getNodeFromInstance(node);
},
isAncestor: function (a, b) {
return TreeTraversal.isAncestor(a, b);
},
getLowestCommonAncestor: function (a, b) {
return TreeTraversal.getLowestCommonAncestor(a, b);
},
getParentInstance: function (inst) {
return TreeTraversal.getParentInstance(inst);
},
traverseTwoPhase: function (target, fn, arg) {
return TreeTraversal.traverseTwoPhase(target, fn, arg);
},
traverseEnterLeave: function (from, to, fn, argFrom, argTo) {
return TreeTraversal.traverseEnterLeave(from, to, fn, argFrom, argTo);
},
injection: injection
};
module.exports = EventPluginUtils;
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