MediaWiki:Gadget-CollapsibleToggle.js

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/**!
 *  _________________________________________________________________________________
 * |                                                                                 |
 * |                      === WARNING: GLOBAL GADGET FILE ===                        |
 * |                    Changes to this page affect many users.                      |
 * |  Please discuss changes on the talk page, [[WP:VPT]] or GitHub before editing.  |
 * |_________________________________________________________________________________|
 *
 * CollapsibleToggle.js
 * 早期的 NavFrame 替代產品，使用後可以如同 NavFrame 點 Head 展開或關閉
 * 
 * @author [[User:SunAfterRain]]
 * @license BSD 3-Clause
 */
// <nowiki>
$(() => {
	const HEAD_KEY = 'CollapsibleToggle.head';
	const DATA_KEY = 'CollapsibleToggle.data';

	const CLASS_SELECTOR = '.collapsible-title';
	const IGNORE_TRIGGER_SELECTOR = 'a, button, .mw-collapsible-toggle, .collapsible-toggle-ignore';
	
	function collapsibleGetHead($collapsible) {
		let $element;
		if ($collapsible.is('table')) {
			// If the table has a caption, collapse to the caption
			// as opposed to the first row
			const $caption = $collapsible.find( '> caption' );
			if ($caption.length) {
				$element = $caption;
			} else {
				const $tr = $collapsible.find('tr').first();
				if ($tr.is(CLASS_SELECTOR)) {
					return $tr;
				}
				$element = $tr.find('th, td');
			}
		} else if ($collapsible.is('ul') || $collapsible.is('ol')) {
			// The toggle-link will be in the first list-item
			$element = $collapsible.find( 'li' ).first();
		} else {
			$element = $collapsible.children();
		}
		return $element.filter(CLASS_SELECTOR);
	}

	function initCollapsibleToggle(element) {
		const $element = $(element);
		let $head = collapsibleGetHead($element);
		if (!$head.length) {
			$head = $element.parent(CLASS_SELECTOR);
		}
		const mwCollapsibleData = $element.data('mwCollapsible');
		if (
			!$element.hasClass('mw-collapsible')
			|| ($element.attr('id') || '').startsWith('mw-customcollapsible-')
			|| $element.hasClass('gadget-collapsible-toggle-optout')
			|| !$element.data('mwMadeCollapsible')
			|| !mwCollapsibleData
			|| !$head.length
			|| !!$element.data(DATA_KEY)
		) {
			return;
		}

		$element.addClass('gadget-collapsible-toggle');
		$head
			.on('mousedown', (e) => {
				// https://commons.wikimedia.org/wiki/MediaWiki:Gadget-CollapsibleTemplates.js?oldid=458731733#L47
				const $target = $(e.target);
				if ($target.is(IGNORE_TRIGGER_SELECTOR) || $target.parents(IGNORE_TRIGGER_SELECTOR).length) {
					return true;
				}
				mwCollapsibleData.toggle();
				return false;
			});

		$head.data(HEAD_KEY, true);
		$element.data(DATA_KEY, {
			mwCollapsibleData
		});
	}

	function initCollapsibleToggleWrapper($frame) {
		for (const frame of $frame.get()) {
			initCollapsibleToggle(frame);
		}
	}

	if (typeof $.fn.makeCollapsible === 'function') {
		initCollapsibleToggleWrapper($('.mw-collapsible'));
	}

	mw.hook('wikipage.collapsibleContent').add(initCollapsibleToggleWrapper);
	mw.hook('ext.gadget.CollapsibleToggle').add(initCollapsibleToggleWrapper);
});
// </nowiki>