281 lines
8.7 KiB
JavaScript
281 lines
8.7 KiB
JavaScript
/**
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* @file
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* Define vertical tabs functionality.
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*/
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/**
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* Triggers when form values inside a vertical tab changes.
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*
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* This is used to update the summary in vertical tabs in order to know what
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* are the important fields' values.
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*
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* @event summaryUpdated
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*/
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(function ($, Drupal, drupalSettings) {
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/**
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* Show the parent vertical tab pane of a targeted page fragment.
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*
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* In order to make sure a targeted element inside a vertical tab pane is
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* visible on a hash change or fragment link click, show all parent panes.
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*
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* @param {jQuery.Event} e
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* The event triggered.
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* @param {jQuery} $target
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* The targeted node as a jQuery object.
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*/
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const handleFragmentLinkClickOrHashChange = (e, $target) => {
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$target.parents('.vertical-tabs__pane').each((index, pane) => {
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$(pane).data('verticalTab').focus();
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});
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};
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/**
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* This script transforms a set of details into a stack of vertical tabs.
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*
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* Each tab may have a summary which can be updated by another
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* script. For that to work, each details element has an associated
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* 'verticalTabCallback' (with jQuery.data() attached to the details),
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* which is called every time the user performs an update to a form
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* element inside the tab pane.
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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 behaviors for vertical tabs.
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*/
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Drupal.behaviors.verticalTabs = {
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attach(context) {
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const width = drupalSettings.widthBreakpoint || 640;
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const mq = `(max-width: ${width}px)`;
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if (window.matchMedia(mq).matches) {
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return;
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}
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/**
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* Binds a listener to handle fragment link clicks and URL hash changes.
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*/
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$('body').once('vertical-tabs-fragments').on('formFragmentLinkClickOrHashChange.verticalTabs', handleFragmentLinkClickOrHashChange);
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$(context).find('[data-vertical-tabs-panes]').once('vertical-tabs').each(function () {
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const $this = $(this).addClass('vertical-tabs__panes');
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const focusID = $this.find(':hidden.vertical-tabs__active-tab').val();
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let tabFocus;
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// Check if there are some details that can be converted to
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// vertical-tabs.
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const $details = $this.find('> details');
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if ($details.length === 0) {
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return;
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}
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// Create the tab column.
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const tabList = $('<ul class="vertical-tabs__menu"></ul>');
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$this.wrap('<div class="vertical-tabs clearfix"></div>').before(tabList);
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// Transform each details into a tab.
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$details.each(function () {
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const $that = $(this);
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const verticalTab = new Drupal.verticalTab({
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title: $that.find('> summary').text(),
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details: $that,
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});
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tabList.append(verticalTab.item);
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$that
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.removeClass('collapsed')
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// prop() can't be used on browsers not supporting details element,
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// the style won't apply to them if prop() is used.
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.attr('open', true)
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.addClass('vertical-tabs__pane')
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.data('verticalTab', verticalTab);
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if (this.id === focusID) {
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tabFocus = $that;
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}
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});
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$(tabList).find('> li').eq(0).addClass('first');
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$(tabList).find('> li').eq(-1).addClass('last');
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if (!tabFocus) {
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// If the current URL has a fragment and one of the tabs contains an
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// element that matches the URL fragment, activate that tab.
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const $locationHash = $this.find(window.location.hash);
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if (window.location.hash && $locationHash.length) {
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tabFocus = $locationHash.closest('.vertical-tabs__pane');
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}
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else {
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tabFocus = $this.find('> .vertical-tabs__pane').eq(0);
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}
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}
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if (tabFocus.length) {
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tabFocus.data('verticalTab').focus();
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}
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});
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},
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};
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/**
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* The vertical tab object represents a single tab within a tab group.
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*
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* @constructor
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*
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* @param {object} settings
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* Settings object.
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* @param {string} settings.title
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* The name of the tab.
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* @param {jQuery} settings.details
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* The jQuery object of the details element that is the tab pane.
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*
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* @fires event:summaryUpdated
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*
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* @listens event:summaryUpdated
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*/
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Drupal.verticalTab = function (settings) {
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const self = this;
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$.extend(this, settings, Drupal.theme('verticalTab', settings));
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this.link.attr('href', `#${settings.details.attr('id')}`);
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this.link.on('click', (e) => {
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e.preventDefault();
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self.focus();
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});
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// Keyboard events added:
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// Pressing the Enter key will open the tab pane.
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this.link.on('keydown', (event) => {
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if (event.keyCode === 13) {
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event.preventDefault();
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self.focus();
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// Set focus on the first input field of the visible details/tab pane.
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$('.vertical-tabs__pane :input:visible:enabled').eq(0).trigger('focus');
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}
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});
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this.details
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.on('summaryUpdated', () => {
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self.updateSummary();
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})
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.trigger('summaryUpdated');
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};
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Drupal.verticalTab.prototype = {
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/**
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* Displays the tab's content pane.
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*/
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focus() {
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this.details
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.siblings('.vertical-tabs__pane')
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.each(function () {
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const tab = $(this).data('verticalTab');
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tab.details.hide();
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tab.item.removeClass('is-selected');
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})
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.end()
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.show()
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.siblings(':hidden.vertical-tabs__active-tab')
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.val(this.details.attr('id'));
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this.item.addClass('is-selected');
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// Mark the active tab for screen readers.
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$('#active-vertical-tab').remove();
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this.link.append(`<span id="active-vertical-tab" class="visually-hidden">${Drupal.t('(active tab)')}</span>`);
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},
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/**
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* Updates the tab's summary.
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*/
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updateSummary() {
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this.summary.html(this.details.drupalGetSummary());
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},
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/**
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* Shows a vertical tab pane.
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*
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* @return {Drupal.verticalTab}
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* The verticalTab instance.
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*/
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tabShow() {
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// Display the tab.
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this.item.show();
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// Show the vertical tabs.
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this.item.closest('.js-form-type-vertical-tabs').show();
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// Update .first marker for items. We need recurse from parent to retain
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// the actual DOM element order as jQuery implements sortOrder, but not
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// as public method.
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this.item
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.parent()
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.children('.vertical-tabs__menu-item')
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.removeClass('first')
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.filter(':visible')
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.eq(0)
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.addClass('first');
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// Display the details element.
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this.details.removeClass('vertical-tab--hidden').show();
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// Focus this tab.
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this.focus();
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return this;
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},
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/**
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* Hides a vertical tab pane.
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*
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* @return {Drupal.verticalTab}
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* The verticalTab instance.
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*/
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tabHide() {
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// Hide this tab.
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this.item.hide();
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// Update .first marker for items. We need recurse from parent to retain
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// the actual DOM element order as jQuery implements sortOrder, but not
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// as public method.
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this.item
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.parent()
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.children('.vertical-tabs__menu-item')
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.removeClass('first')
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.filter(':visible')
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.eq(0)
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.addClass('first');
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// Hide the details element.
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this.details.addClass('vertical-tab--hidden').hide();
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// Focus the first visible tab (if there is one).
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const $firstTab = this.details.siblings('.vertical-tabs__pane:not(.vertical-tab--hidden)').eq(0);
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if ($firstTab.length) {
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$firstTab.data('verticalTab').focus();
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}
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// Hide the vertical tabs (if no tabs remain).
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else {
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this.item.closest('.js-form-type-vertical-tabs').hide();
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}
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return this;
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},
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};
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/**
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* Theme function for a vertical tab.
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*
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* @param {object} settings
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* An object with the following keys:
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* @param {string} settings.title
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* The name of the tab.
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*
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* @return {object}
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* This function has to return an object with at least these keys:
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* - item: The root tab jQuery element
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* - link: The anchor tag that acts as the clickable area of the tab
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* (jQuery version)
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* - summary: The jQuery element that contains the tab summary
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*/
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Drupal.theme.verticalTab = function (settings) {
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const tab = {};
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tab.item = $('<li class="vertical-tabs__menu-item" tabindex="-1"></li>')
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.append(tab.link = $('<a href="#"></a>')
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.append(tab.title = $('<strong class="vertical-tabs__menu-item-title"></strong>').text(settings.title))
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.append(tab.summary = $('<span class="vertical-tabs__menu-item-summary"></span>'),
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),
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);
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return tab;
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};
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}(jQuery, Drupal, drupalSettings));
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