From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001 From: Florian Dold Date: Wed, 3 May 2017 15:35:00 +0200 Subject: node_modules --- node_modules/react/lib/ReactChildren.js | 190 ++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 node_modules/react/lib/ReactChildren.js (limited to 'node_modules/react/lib/ReactChildren.js') diff --git a/node_modules/react/lib/ReactChildren.js b/node_modules/react/lib/ReactChildren.js new file mode 100644 index 000000000..4a2cab70d --- /dev/null +++ b/node_modules/react/lib/ReactChildren.js @@ -0,0 +1,190 @@ +/** + * 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 PooledClass = require('./PooledClass'); +var ReactElement = require('./ReactElement'); + +var emptyFunction = require('fbjs/lib/emptyFunction'); +var traverseAllChildren = require('./traverseAllChildren'); + +var twoArgumentPooler = PooledClass.twoArgumentPooler; +var fourArgumentPooler = PooledClass.fourArgumentPooler; + +var userProvidedKeyEscapeRegex = /\/+/g; +function escapeUserProvidedKey(text) { + return ('' + text).replace(userProvidedKeyEscapeRegex, '$&/'); +} + +/** + * PooledClass representing the bookkeeping associated with performing a child + * traversal. Allows avoiding binding callbacks. + * + * @constructor ForEachBookKeeping + * @param {!function} forEachFunction Function to perform traversal with. + * @param {?*} forEachContext Context to perform context with. + */ +function ForEachBookKeeping(forEachFunction, forEachContext) { + this.func = forEachFunction; + this.context = forEachContext; + this.count = 0; +} +ForEachBookKeeping.prototype.destructor = function () { + this.func = null; + this.context = null; + this.count = 0; +}; +PooledClass.addPoolingTo(ForEachBookKeeping, twoArgumentPooler); + +function forEachSingleChild(bookKeeping, child, name) { + var func = bookKeeping.func, + context = bookKeeping.context; + + func.call(context, child, bookKeeping.count++); +} + +/** + * Iterates through children that are typically specified as `props.children`. + * + * See https://facebook.github.io/react/docs/top-level-api.html#react.children.foreach + * + * The provided forEachFunc(child, index) will be called for each + * leaf child. + * + * @param {?*} children Children tree container. + * @param {function(*, int)} forEachFunc + * @param {*} forEachContext Context for forEachContext. + */ +function forEachChildren(children, forEachFunc, forEachContext) { + if (children == null) { + return children; + } + var traverseContext = ForEachBookKeeping.getPooled(forEachFunc, forEachContext); + traverseAllChildren(children, forEachSingleChild, traverseContext); + ForEachBookKeeping.release(traverseContext); +} + +/** + * PooledClass representing the bookkeeping associated with performing a child + * mapping. Allows avoiding binding callbacks. + * + * @constructor MapBookKeeping + * @param {!*} mapResult Object containing the ordered map of results. + * @param {!function} mapFunction Function to perform mapping with. + * @param {?*} mapContext Context to perform mapping with. + */ +function MapBookKeeping(mapResult, keyPrefix, mapFunction, mapContext) { + this.result = mapResult; + this.keyPrefix = keyPrefix; + this.func = mapFunction; + this.context = mapContext; + this.count = 0; +} +MapBookKeeping.prototype.destructor = function () { + this.result = null; + this.keyPrefix = null; + this.func = null; + this.context = null; + this.count = 0; +}; +PooledClass.addPoolingTo(MapBookKeeping, fourArgumentPooler); + +function mapSingleChildIntoContext(bookKeeping, child, childKey) { + var result = bookKeeping.result, + keyPrefix = bookKeeping.keyPrefix, + func = bookKeeping.func, + context = bookKeeping.context; + + + var mappedChild = func.call(context, child, bookKeeping.count++); + if (Array.isArray(mappedChild)) { + mapIntoWithKeyPrefixInternal(mappedChild, result, childKey, emptyFunction.thatReturnsArgument); + } else if (mappedChild != null) { + if (ReactElement.isValidElement(mappedChild)) { + mappedChild = ReactElement.cloneAndReplaceKey(mappedChild, + // Keep both the (mapped) and old keys if they differ, just as + // traverseAllChildren used to do for objects as children + keyPrefix + (mappedChild.key && (!child || child.key !== mappedChild.key) ? escapeUserProvidedKey(mappedChild.key) + '/' : '') + childKey); + } + result.push(mappedChild); + } +} + +function mapIntoWithKeyPrefixInternal(children, array, prefix, func, context) { + var escapedPrefix = ''; + if (prefix != null) { + escapedPrefix = escapeUserProvidedKey(prefix) + '/'; + } + var traverseContext = MapBookKeeping.getPooled(array, escapedPrefix, func, context); + traverseAllChildren(children, mapSingleChildIntoContext, traverseContext); + MapBookKeeping.release(traverseContext); +} + +/** + * Maps children that are typically specified as `props.children`. + * + * See https://facebook.github.io/react/docs/top-level-api.html#react.children.map + * + * The provided mapFunction(child, key, index) will be called for each + * leaf child. + * + * @param {?*} children Children tree container. + * @param {function(*, int)} func The map function. + * @param {*} context Context for mapFunction. + * @return {object} Object containing the ordered map of results. + */ +function mapChildren(children, func, context) { + if (children == null) { + return children; + } + var result = []; + mapIntoWithKeyPrefixInternal(children, result, null, func, context); + return result; +} + +function forEachSingleChildDummy(traverseContext, child, name) { + return null; +} + +/** + * Count the number of children that are typically specified as + * `props.children`. + * + * See https://facebook.github.io/react/docs/top-level-api.html#react.children.count + * + * @param {?*} children Children tree container. + * @return {number} The number of children. + */ +function countChildren(children, context) { + return traverseAllChildren(children, forEachSingleChildDummy, null); +} + +/** + * Flatten a children object (typically specified as `props.children`) and + * return an array with appropriately re-keyed children. + * + * See https://facebook.github.io/react/docs/top-level-api.html#react.children.toarray + */ +function toArray(children) { + var result = []; + mapIntoWithKeyPrefixInternal(children, result, null, emptyFunction.thatReturnsArgument); + return result; +} + +var ReactChildren = { + forEach: forEachChildren, + map: mapChildren, + mapIntoWithKeyPrefixInternal: mapIntoWithKeyPrefixInternal, + count: countChildren, + toArray: toArray +}; + +module.exports = ReactChildren; \ No newline at end of file -- cgit v1.2.3