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/**
 * Handles the resizing of a menu according to the available screen width
 *
 * Uses themes/original/css/resizable-menu.css.php
 *
 * To initialize:
 * $('#myMenu').menuResizer(function () {
 *     // This function will be called to find out how much
 *     // available horizontal space there is for the menu
 *     return $('body').width() - 5; // Some extra margin for good measure
 * });
 *
 * To trigger a resize operation:
 * $('#myMenu').menuResizer('resize'); // Bind this to $(window).resize()
 *
 * To restore the menu to a state like before it was initialized:
 * $('#myMenu').menuResizer('destroy');
 *
 * @package PhpMyAdmin
 */
(function ($) {
    function MenuResizer ($container, widthCalculator) {
        var self = this;
        self.$container = $container;
        self.widthCalculator = widthCalculator;
        var windowWidth = $(window).width();

        if (windowWidth < 768) {
            $('#pma_navigation_resizer').css({ 'width': '0px' });
        }

        // create submenu container
        var link = $('<a></a>', {
            'href': '#',
            'class': 'nav-link dropdown-toggle',
            'id': 'navbarDropdown',
            'role': 'button',
            'data-bs-toggle': 'dropdown',
            'aria-haspopup': 'true',
            'aria-expanded': 'false'
        }).text(Messages.strMore);

        var img = $container.find('li img');
        if (img.length) {
            $(Functions.getImage('b_more').toString()).prependTo(link);
        }
        var $submenu = $('<li></li>', { 'class': 'nav-item dropdown d-none' })
            .append(link)
            .append($('<ul></ul>', {
                'class': 'dropdown-menu dropdown-menu-end',
                'aria-labelledby': 'navbarDropdown'
            }));
        $container.append($submenu);
        setTimeout(function () {
            self.resize();
        }, 4);
    }
    MenuResizer.prototype.resize = function () {
        var wmax = this.widthCalculator.call(this.$container);
        var windowWidth = $(window).width();
        var $submenu = this.$container.find('.nav-item.dropdown').last();
        var submenuW = $submenu.outerWidth(true);
        var $submenuUl = $submenu.find('.dropdown-menu');
        var $li = this.$container.find('> li');
        var $li2 = $submenuUl.find('.dropdown-item');
        var moreShown = $li2.length > 0;
        // Calculate the total width used by all the shown tabs
        var totalLen = moreShown ? submenuW : 0;
        var l = $li.length - 1;
        var i;
        for (i = 0; i < l; i++) {
            totalLen += $($li[i]).outerWidth(true);
        }

        // eslint-disable-next-line compat/compat
        var hasVScroll = document.body.scrollHeight > document.body.clientHeight;
        if (hasVScroll) {
            windowWidth += 15;
        }
        if (windowWidth < 768) {
            wmax = 2000;
        }

        // Now hide menu elements that don't fit into the menubar
        var hidden = false; // Whether we have hidden any tabs
        while (totalLen >= wmax && --l >= 0) { // Process the tabs backwards
            hidden = true;
            var el = $($li[l]);
            el.removeClass('nav-item').addClass('dropdown-item');
            var elWidth = el.outerWidth(true);
            el.data('width', elWidth);
            if (! moreShown) {
                totalLen -= elWidth;
                el.prependTo($submenuUl);
                totalLen += submenuW;
                moreShown = true;
            } else {
                totalLen -= elWidth;
                el.prependTo($submenuUl);
            }
        }
        // If we didn't hide any tabs, then there might be some space to show some
        if (! hidden) {
            // Show menu elements that do fit into the menubar
            for (i = 0, l = $li2.length; i < l; i++) {
                totalLen += $($li2[i]).data('width');
                // item fits or (it is the last item
                // and it would fit if More got removed)
                if (totalLen < wmax ||
                    (i === $li2.length - 1 && totalLen - submenuW < wmax)
                ) {
                    $($li2[i]).removeClass('dropdown-item').addClass('nav-item');
                    $($li2[i]).insertBefore($submenu);
                } else {
                    break;
                }
            }
        }
        // Show/hide the "More" tab as needed
        if (windowWidth < 768) {
            $('.navbar-collapse').css({ 'width': windowWidth - 80 - $('#pma_navigation').width() });
            $submenu.addClass('d-none');
            $('.navbar-collapse').css({ 'overflow': 'hidden' });
        } else {
            $('.navbar-collapse').css({ 'width': 'auto' });
            $('.navbar-collapse').css({ 'overflow': 'visible' });
            if ($submenuUl.find('li').length > 0) {
                $submenu.removeClass('d-none');
            } else {
                $submenu.addClass('d-none');
            }
        }
    };
    MenuResizer.prototype.destroy = function () {
        var $submenu = this.$container.find('.nav-item.dropdown').removeData();
        $submenu.find('li').appendTo(this.$container);
        $submenu.remove();
    };

    /** Public API */
    var methods = {
        init: function (widthCalculator) {
            return this.each(function () {
                var $this = $(this);
                if (! $this.data('menuResizer')) {
                    $this.data(
                        'menuResizer',
                        new MenuResizer($this, widthCalculator)
                    );
                }
            });
        },
        resize: function () {
            return this.each(function () {
                var self = $(this).data('menuResizer');
                if (self) {
                    self.resize();
                }
            });
        },
        destroy: function () {
            return this.each(function () {
                var self = $(this).data('menuResizer');
                if (self) {
                    self.destroy();
                }
            });
        }
    };

    /**
     * Extend jQuery
     *
     * @param {string} method
     *
     * @return {any}
     */
    $.fn.menuResizer = function (method) {
        if (methods[method]) {
            return methods[method].call(this);
        } else if (typeof method === 'function') {
            return methods.init.apply(this, [method]);
        } else {
            $.error('Method ' +  method + ' does not exist on jQuery.menuResizer');
        }
    };
}(jQuery));

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