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Diffstat (limited to 'node_modules/react-dom/lib/EventPluginUtils.js')
| -rw-r--r-- | node_modules/react-dom/lib/EventPluginUtils.js | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/EventPluginUtils.js b/node_modules/react-dom/lib/EventPluginUtils.js new file mode 100644 index 000000000..c3929db61 --- /dev/null +++ b/node_modules/react-dom/lib/EventPluginUtils.js @@ -0,0 +1,225 @@ +/** + * 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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