Gazelle/static/functions/cssgallery.js

$(document).ready(function () {
    // If the custom stylesheet field is empty, select the current style from the previews
    if (!$('input#styleurl').val()) {
        var radiobutton = $('input[name="stylesheet_gallery"][value="' + $('select#stylesheet').val() + '"]');
        radiobutton.click();
        $('.preview_wrapper').removeClass('selected');
        radiobutton.parent().parent().addClass('selected');
    }

    // If the input is clicked, redirect it to the overlay click event
    $('input[name="stylesheet_gallery"]').click(function () {
        $('.preview_wrapper').removeClass('selected');
        var parent = $(this).parent();
        parent.addClass('selected');
        var radiobutton = parent.find('input');
        radiobutton.prop('checked', true);
        $('select#stylesheet').val(radiobutton.attr('value'));
        $('select#stylesheet').change();
        $('input#styleurl').val('');
    })

    // Passthrough image click to radio button
    $('.preview_image').click(function (e) {
        e.currentTarget.children[1].children[0].children[0].click();
    })

    // If the drop-down is changed, select the appropriate item in gallery, clear the custom CSS field
    $('select#stylesheet').change(function () {
        var radiobutton = $('input[name="stylesheet_gallery"][value="' + $(this).val() + '"]');
        radiobutton.prop('checked', true);
        $('.preview_wrapper').removeClass('selected');
        radiobutton.parent().parent().addClass('selected');
        $('input#styleurl').val('');
    })

    // If the custom CSS field is changed, clear radio buttons
    $('input#styleurl').keydown(function () {
        $('input[name="stylesheet_gallery"]').each(function () {
            $(this).prop('checked', false);
        })
        $('.preview_wrapper').removeClass('selected');
    })

    // If the input is empty, select appropriate gallery item again by the drop-down
    $('input#styleurl').keyup(function () {
        if (!$(this).val()) {
            $('select#stylesheet').change();
        }
    })

    // Allow the CSS gallery to be expanded/contracted
    $('#toggle_css_gallery').click(function (e) {
        e.preventDefault();
        $('#css_gallery').slideToggle(function () {
            $('#toggle_css_gallery').text($(this).is(':visible') ? 'Hide gallery' : 'Show gallery');
        });
    });

    document.querySelectorAll('[name=style_additions\\[\\]]').forEach(function (el) {
        el.addEventListener('change', function (e) {
            document.body.classList.toggle('style_' + e.target.value);

            /*
            if (e.target.checked) {
                document.body.classList.add('style_' + e.target.value);
            } else {
                document.body.classList.remove('style_' + e.target.value);
            }
            */
        })
    })

    var userstyle = $('link[rel=stylesheet][title]')[0]
    $('select#stylesheet').on('change', function (e) {
        var changetext = e.target.options[e.target.selectedIndex].text.toLowerCase();
        userstyle.href = userstyle.href.replace(/\w+\.css/i, changetext + '.css');

        $('.style_addition').each(function (i, el) {
            if (el.id == 'style_addition_' + changetext) {
                if (el.children.length) {
                    el.classList.remove('hidden');
                    $('#style_additions_tr')[0].classList.remove('hidden');
                } else {
                    $('#style_additions_tr')[0].classList.add('hidden');
                }
            } else {
                el.classList.add('hidden');
            }
        })
    })
});