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Diffstat (limited to 'tools/addon-sdk-1.12/lib/sdk/deprecated/list.js')
-rw-r--r-- | tools/addon-sdk-1.12/lib/sdk/deprecated/list.js | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.12/lib/sdk/deprecated/list.js b/tools/addon-sdk-1.12/lib/sdk/deprecated/list.js new file mode 100644 index 0000000..5de69e7 --- /dev/null +++ b/tools/addon-sdk-1.12/lib/sdk/deprecated/list.js @@ -0,0 +1,118 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ +"use strict"; + +module.metadata = { + "stability": "experimental" +}; + +const { Trait } = require('../deprecated/traits'); + +/** + * @see https://jetpack.mozillalabs.com/sdk/latest/docs/#module/api-utils/list + */ +const Iterable = Trait.compose({ + /** + * Hash map of key-values to iterate over. + * Note: That this property can be a getter if you need dynamic behavior. + * @type {Object} + */ + _keyValueMap: Trait.required, + /** + * Custom iterator providing `Iterable`s enumeration behavior. + * @param {Boolean} onKeys + */ + __iterator__: function __iterator__(onKeys, onKeyValue) { + let map = this._keyValueMap; + for (let key in map) + yield onKeyValue ? [key, map[key]] : onKeys ? key : map[key]; + } +}); +exports.Iterable = Iterable; + +/** + * An ordered collection (also known as a sequence) disallowing duplicate + * elements. List is composed out of `Iterable` there for it provides custom + * enumeration behavior that is similar to array (enumerates only on the + * elements of the list). List is a base trait and is meant to be a part of + * composition, since all of it's API is private except length property. + */ +const List = Trait.resolve({ toString: null }).compose({ + _keyValueMap: null, + /** + * List constructor can take any number of element to populate itself. + * @params {Object|String|Number} element + * @example + * List(1,2,3).length == 3 // true + */ + constructor: function List() { + this._keyValueMap = []; + for (let i = 0, ii = arguments.length; i < ii; i++) + this._add(arguments[i]); + }, + /** + * Number of elements in this list. + * @type {Number} + */ + get length() this._keyValueMap.length, + /** + * Returns a string representing this list. + * @returns {String} + */ + toString: function toString() 'List(' + this._keyValueMap + ')', + /** + * Returns `true` if this list contains the specified `element`. + * @param {Object|Number|String} element + * @returns {Boolean} + */ + _has: function _has(element) 0 <= this._keyValueMap.indexOf(element), + /** + * Appends the specified `element` to the end of this list, if it doesn't + * contains it. Ignores the call if `element` is already contained. + * @param {Object|Number|String} element + */ + _add: function _add(element) { + let list = this._keyValueMap, + index = list.indexOf(element); + if (0 > index) + list.push(this._public[list.length] = element); + }, + /** + * Removes specified `element` from this list, if it contains it. + * Ignores the call if `element` is not contained. + * @param {Object|Number|String} element + */ + _remove: function _remove(element) { + let list = this._keyValueMap, + index = list.indexOf(element); + if (0 <= index) { + delete this._public[list.length - 1]; + list.splice(index, 1); + for (let length = list.length; index < length; index++) + this._public[index] = list[index]; + } + }, + /** + * Removes all of the elements from this list. + */ + _clear: function _clear() { + for (let i = 0, ii = this._keyValueMap.length; i < ii; i ++) + delete this._public[i]; + this._keyValueMap.splice(0); + }, + /** + * Custom iterator providing `List`s enumeration behavior. + * We cant reuse `_iterator` that is defined by `Iterable` since it provides + * iteration in an arbitrary order. + * @see https://developer.mozilla.org/en/JavaScript/Reference/Statements/for...in + * @param {Boolean} onKeys + */ + __iterator__: function __iterator__(onKeys, onKeyValue) { + let array = this._keyValueMap.slice(0), + i = -1; + for each(let element in array) + yield onKeyValue ? [++i, element] : onKeys ? ++i : element; + } +}); +exports.List = List; |