mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-10-25 22:28:27 +00:00
91 lines
2.4 KiB
JavaScript
91 lines
2.4 KiB
JavaScript
/* 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 { Class } = require('../core/heritage');
|
|
const listNS = require('../core/namespace').ns();
|
|
|
|
const listOptions = {
|
|
/**
|
|
* List constructor can take any number of element to populate itself.
|
|
* @params {Object|String|Number} element
|
|
* @example
|
|
* List(1,2,3).length == 3 // true
|
|
*/
|
|
initialize: function List() {
|
|
listNS(this).keyValueMap = [];
|
|
|
|
for (let i = 0, ii = arguments.length; i < ii; i++)
|
|
addListItem(this, arguments[i]);
|
|
},
|
|
/**
|
|
* Number of elements in this list.
|
|
* @type {Number}
|
|
*/
|
|
get length() {
|
|
return listNS(this).keyValueMap.length;
|
|
},
|
|
/**
|
|
* Returns a string representing this list.
|
|
* @returns {String}
|
|
*/
|
|
toString: function toString() {
|
|
return 'List(' + listNS(this).keyValueMap + ')';
|
|
},
|
|
/**
|
|
* 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 = listNS(this).keyValueMap.slice(0),
|
|
i = -1;
|
|
for (let element of array)
|
|
yield onKeyValue ? [++i, element] : onKeys ? ++i : element;
|
|
},
|
|
};
|
|
listOptions[Symbol.iterator] = function iterator() {
|
|
return listNS(this).keyValueMap.slice(0)[Symbol.iterator]();
|
|
};
|
|
const List = Class(listOptions);
|
|
exports.List = List;
|
|
|
|
function addListItem(that, value) {
|
|
let list = listNS(that).keyValueMap,
|
|
index = list.indexOf(value);
|
|
|
|
if (-1 === index) {
|
|
try {
|
|
that[that.length] = value;
|
|
}
|
|
catch (e) {}
|
|
list.push(value);
|
|
}
|
|
}
|
|
exports.addListItem = addListItem;
|
|
|
|
function removeListItem(that, element) {
|
|
let list = listNS(that).keyValueMap,
|
|
index = list.indexOf(element);
|
|
|
|
if (0 <= index) {
|
|
list.splice(index, 1);
|
|
try {
|
|
for (let length = list.length; index < length; index++)
|
|
that[index] = list[index];
|
|
that[list.length] = undefined;
|
|
}
|
|
catch(e){}
|
|
}
|
|
}
|
|
exports.removeListItem = removeListItem;
|
|
|
|
exports.listNS = listNS;
|