https://www.construction-simulator.com/js/jquery-chained.js

1/*
2 * Chained - jQuery / Zepto chained selects plugin
3 *
4 * Copyright (c) 2010-2017 Mika Tuupola
5 *
6 * Licensed under the MIT license:
7 *   http://www.opensource.org/licenses/mit-license.php
8 *
9 * Project home:
10 *   http://www.appelsiini.net/projects/chained
11 *
12 * Version: 2.0.0-beta.3
13 *
14 */
15
16;(function($, window, document, undefined) {
17    "use strict";
18
19    $.fn.chained = function(parentSelector) {
20        return this.each(function() {
21
22            /* Save this to child because this changes when scope changes. */
23            var child   = this;
24            var backup = $(child).clone();
25
26            /* Handles maximum two parents now. */
27            $(parentSelector).each(function() {
28                $(this).bind("change", function() {
29                    updateChildren();
30                });
31
32                /* Force IE to see something selected on first page load, */
33                /* unless something is already selected */
34                if (!$("option:selected", this).length) {
35                    $("option", this).first().attr("selected", "selected");
36                }
37
38                /* Force updating the children. */
39                updateChildren();
40            });
41
42            function updateChildren() {
43                var triggerChange = true;
44                var currentlySelectedValue = $("option:selected", child).val();
45
46                $(child).html(backup.html());
47
48                /* If multiple parents build value like foo+bar. */
49                var selected = "";
50                $(parentSelector).each(function() {
51                    var selectedValue = $("option:selected", this).val();
52                    if (selectedValue) {
53                        if (selected.length > 0) {
54                            selected += "+";
55                        }
56                        selected += selectedValue;
57                    }
58                });
59
60                /* Also check for first parent without subclassing. */
61                /* TODO: This should be dynamic and check for each parent */
62                /*       without subclassing. */
63                var first;
64                if ($.isArray(parentSelector)) {
65                    first = $(parentSelector[0]).first();
66                } else {
67                    first = $(parentSelector).first();
68                }
69                var selectedFirst = $("option:selected", first).val();
70
71                $("option", child).each(function() {
72                    /* Always leave the default value in place. */
73                    if ($(this).val() === "") {
74                        return;
75                    }
76                    var matches = [];
77                    var data = String($(this).data("chained"));
78                    if (data) {
79                        matches = data.split(" ");
80                    }
81                    if ((matches.indexOf(selected) > -1) || (matches.indexOf(selectedFirst) > -1)) {
82                        if ($(this).val() === currentlySelectedValue) {
83                            $(this).prop("selected", true);
84                            triggerChange = false;
85                        }
86                    } else {
87                        $(this).remove();
88                    }
89                });
90
91                /* If we have only the default value disable select. */
92                if (1 === $("option", child).length && $(child).val() === "") {
93                    $(child).prop("disabled", true);
94                } else {
95                    $(child).prop("disabled", false);
96                }
97                if (triggerChange) {
98                    $(child).trigger("change");
99                }
100            }
101        });
102    };
103
104    /* Alias for those who like to use more English like syntax. */
105    $.fn.chainedTo = $.fn.chained;
106
107    /* Default settings for plugin. */
108    $.fn.chained.defaults = {};
109
110})(window.jQuery || window.Zepto, window, document);