react-native/Libraries/Interaction/InteractionMixin.js

56 lines
1.6 KiB
JavaScript

/**
* Copyright (c) 2015-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.
*
* @providesModule InteractionMixin
* @flow
*/
'use strict';
var InteractionManager = require('InteractionManager');
/**
* This mixin provides safe versions of InteractionManager start/end methods
* that ensures `clearInteractionHandle` is always called
* once per start, even if the component is unmounted.
*/
var InteractionMixin = {
componentWillUnmount: function() {
while (this._interactionMixinHandles.length) {
InteractionManager.clearInteractionHandle(
this._interactionMixinHandles.pop()
);
}
},
_interactionMixinHandles: ([]: Array<number>),
createInteractionHandle: function() {
var handle = InteractionManager.createInteractionHandle();
this._interactionMixinHandles.push(handle);
return handle;
},
clearInteractionHandle: function(clearHandle: number) {
InteractionManager.clearInteractionHandle(clearHandle);
this._interactionMixinHandles = this._interactionMixinHandles.filter(
handle => handle !== clearHandle
);
},
/**
* Schedule work for after all interactions have completed.
*
* @param {function} callback
*/
runAfterInteractions: function(callback: Function) {
InteractionManager.runAfterInteractions(callback);
},
};
module.exports = InteractionMixin;