107 lines
No EOL
3.8 KiB
JavaScript
107 lines
No EOL
3.8 KiB
JavaScript
/* jshint -W098 */
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/*
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* Chained - jQuery / Zepto chained selects plugin
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*
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* Copyright (c) 2010-2013 Mika Tuupola
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* Project home:
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* http://www.appelsiini.net/projects/chained
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*
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* Version: 0.9.8
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*
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*/
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;(function ($, window, document, undefined) {
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"use strict";
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$.fn.chained = function (parent_selector, options) {
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return this.each(function () {
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/* Save this to child because this changes when scope changes. */
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var child = this;
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var backup = $(child).clone();
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/* Handles maximum two parents now. */
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$(parent_selector).each(function () {
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$(this).bind("change", function () {
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updateChildren();
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});
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/* Force IE to see something selected on first page load, */
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/* unless something is already selected */
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if (!$("option:selected", this).length) {
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$("option", this).first().attr("selected", "selected");
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}
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/* Force updating the children. */
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updateChildren();
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});
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function updateChildren() {
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var trigger_change = true;
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var currently_selected_value = $("option:selected", child).val();
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$(child).html(backup.html());
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/* If multiple parents build classname like foo\bar. */
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var selected = "";
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$(parent_selector).each(function () {
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var selectedClass = $("option:selected", this).val();
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if (selectedClass) {
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if (selected.length > 0) {
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if (window.Zepto) {
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/* Zepto class regexp dies with classes like foo\bar. */
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selected += "\\\\";
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} else {
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selected += "\\";
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}
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}
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selected += selectedClass;
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}
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});
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/* Also check for first parent without subclassing. */
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/* TODO: This should be dynamic and check for each parent */
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/* without subclassing. */
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var first;
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if ($.isArray(parent_selector)) {
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first = $(parent_selector[0]).first();
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} else {
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first = $(parent_selector).first();
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}
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var selected_first = $("option:selected", first).val();
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$("option", child).each(function () {
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/* Remove unneeded items but save the default value. */
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if ($(this).hasClass(selected) && $(this).val() === currently_selected_value) {
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$(this).prop("selected", true);
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trigger_change = false;
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} else if (!$(this).hasClass(selected) && !$(this).hasClass(selected_first) && $(this).val() !== "") {
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$(this).remove();
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}
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});
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/* If we have only the default value disable select. */
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if (1 === $("option", child).length && $(child).val() === "") {
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$(child).prop("disabled", true);
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} else {
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$(child).prop("disabled", false);
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}
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if (trigger_change) {
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$(child).trigger("change");
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}
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}
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});
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};
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/* Alias for those who like to use more English like syntax. */
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$.fn.chainedTo = $.fn.chained;
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/* Default settings for plugin. */
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$.fn.chained.defaults = {};
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})(window.jQuery || window.Zepto, window, document); |