147 lines
4 KiB
JavaScript
147 lines
4 KiB
JavaScript
/**
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* @file
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* Polyfill for HTML5 details elements.
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*/
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(function ($, Modernizr, Drupal) {
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'use strict';
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/**
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* The collapsible details object represents a single details element.
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*
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* @constructor Drupal.CollapsibleDetails
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*
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* @param {HTMLElement} node
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* The details element.
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*/
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function CollapsibleDetails(node) {
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this.$node = $(node);
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this.$node.data('details', this);
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// Expand details if there are errors inside, or if it contains an
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// element that is targeted by the URI fragment identifier.
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var anchor = location.hash && location.hash !== '#' ? ', ' + location.hash : '';
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if (this.$node.find('.error' + anchor).length) {
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this.$node.attr('open', true);
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}
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// Initialize and setup the summary,
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this.setupSummary();
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// Initialize and setup the legend.
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this.setupLegend();
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}
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$.extend(CollapsibleDetails, /** @lends Drupal.CollapsibleDetails */{
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/**
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* Holds references to instantiated CollapsibleDetails objects.
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*
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* @type {Array.<Drupal.CollapsibleDetails>}
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*/
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instances: []
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});
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$.extend(CollapsibleDetails.prototype, /** @lends Drupal.CollapsibleDetails# */{
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/**
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* Initialize and setup summary events and markup.
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*
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* @fires event:summaryUpdated
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*
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* @listens event:summaryUpdated
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*/
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setupSummary: function () {
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this.$summary = $('<span class="summary"></span>');
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this.$node
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.on('summaryUpdated', $.proxy(this.onSummaryUpdated, this))
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.trigger('summaryUpdated');
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},
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/**
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* Initialize and setup legend markup.
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*/
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setupLegend: function () {
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// Turn the summary into a clickable link.
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var $legend = this.$node.find('> summary');
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$('<span class="details-summary-prefix visually-hidden"></span>')
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.append(this.$node.attr('open') ? Drupal.t('Hide') : Drupal.t('Show'))
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.prependTo($legend)
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.after(document.createTextNode(' '));
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// .wrapInner() does not retain bound events.
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$('<a class="details-title"></a>')
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.attr('href', '#' + this.$node.attr('id'))
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.prepend($legend.contents())
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.appendTo($legend);
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$legend
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.append(this.$summary)
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.on('click', $.proxy(this.onLegendClick, this));
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},
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/**
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* Handle legend clicks.
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*
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* @param {jQuery.Event} e
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* The event triggered.
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*/
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onLegendClick: function (e) {
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this.toggle();
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e.preventDefault();
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},
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/**
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* Update summary.
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*/
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onSummaryUpdated: function () {
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var text = $.trim(this.$node.drupalGetSummary());
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this.$summary.html(text ? ' (' + text + ')' : '');
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},
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/**
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* Toggle the visibility of a details element using smooth animations.
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*/
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toggle: function () {
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var isOpen = !!this.$node.attr('open');
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var $summaryPrefix = this.$node.find('> summary span.details-summary-prefix');
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if (isOpen) {
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$summaryPrefix.html(Drupal.t('Show'));
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}
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else {
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$summaryPrefix.html(Drupal.t('Hide'));
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}
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// Delay setting the attribute to emulate chrome behavior and make
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// details-aria.js work as expected with this polyfill.
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setTimeout(function () {
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this.$node.attr('open', !isOpen);
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}.bind(this), 0);
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}
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});
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/**
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* Polyfill HTML5 details element.
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*
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* @type {Drupal~behavior}
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*
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* @prop {Drupal~behaviorAttach} attach
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* Attaches behavior for the details element.
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*/
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Drupal.behaviors.collapse = {
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attach: function (context) {
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if (Modernizr.details) {
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return;
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}
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var $collapsibleDetails = $(context).find('details').once('collapse').addClass('collapse-processed');
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if ($collapsibleDetails.length) {
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for (var i = 0; i < $collapsibleDetails.length; i++) {
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CollapsibleDetails.instances.push(new CollapsibleDetails($collapsibleDetails[i]));
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}
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}
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}
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};
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// Expose constructor in the public space.
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Drupal.CollapsibleDetails = CollapsibleDetails;
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})(jQuery, Modernizr, Drupal);
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