MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

/* Allows images within galleries to be spoiled if "spoiler:" is put at the start of its caption*/
mw.hook('wikipage.content').add(function ($content) {
    $content.find('ul.gallery li.gallerybox').each(function () {
        var $box = $(this);
        var $caption = $box.find('.gallerytext');
        var captionText = $caption.text().trim().toLowerCase();

        if (captionText.startsWith('spoiler:')) {
            $box.addClass('spoiler-image thumb');
            $caption.html($caption.html().replace('spoiler: ', ''));
        }
    });

    $content.find('ul.mw-gallery-slideshow').each(function () {
        var $gallery = $(this);

        function updateLargeImage() {
            var $current = $gallery.find('.gallerybox.slideshow-current');
            if (!$current.length) {
                $current = $gallery.find('.gallerybox').first();
            }

            var $container = $gallery.find('.mw-gallery-slideshow-img-container');

            if ($current.hasClass('spoiler-image') && !$current.hasClass('revealed')) {
                $container.addClass('spoiler-image');
            } else {
                $container.removeClass('spoiler-image revealed');
            }
        }

        updateLargeImage();

        var observer = new MutationObserver(function () {
            updateLargeImage();
        });

        observer.observe($gallery[0], {
            attributes: true,
            attributeFilter: ['class'],
            subtree: true,
            childList: true
        });
    });

    $content.on('click', '.gallerybox.spoiler', function () {
        $(this).addClass('spoiler-image revealed');
    });

    $content.on('click', '.mw-gallery-slideshow-img-container.spoiler-image', function (e) {
        if ($(e.target).closest('.oo-ui-buttonElement, button, a.oo-ui-buttonElement-button').length) {
            return;
        }

        var $container = $(this);

        if (!$container.hasClass('revealed')) {
            e.preventDefault();
            e.stopPropagation();

            $container.addClass('revealed');

            $container.closest('ul.gallery')
                      .find('.gallerybox.slideshow-current')
                      .addClass('revealed');
        }
    });
});