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183
#pma/js/menu-resizer.js
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183
#pma/js/menu-resizer.js
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Handles the resizing of a menu according to the available screen width
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*
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* Uses themes/original/css/resizable-menu.css.php
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*
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* To initialise:
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* $('#myMenu').menuResizer(function () {
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* // This function will be called to find out how much
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* // available horizontal space there is for the menu
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* return $('body').width() - 5; // Some extra margin for good measure
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* });
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*
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* To trigger a resize operation:
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* $('#myMenu').menuResizer('resize'); // Bind this to $(window).resize()
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*
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* To restore the menu to a state like before it was initialized:
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* $('#myMenu').menuResizer('destroy');
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*
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* @package PhpMyAdmin
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*/
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(function ($) {
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function MenuResizer($container, widthCalculator) {
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var self = this;
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self.$container = $container;
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self.widthCalculator = widthCalculator;
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// create submenu container
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var link = $('<a />', {href: '#', 'class': 'tab nowrap'})
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.text(PMA_messages.strMore)
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.bind('click', false); // same as event.preventDefault()
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var img = $container.find('li img');
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if (img.length) {
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$(PMA_getImage('b_more.png').toString()).prependTo(link);
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}
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var $submenu = $('<li />', {'class': 'submenu'})
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.append(link)
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.append($('<ul />'))
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.mouseenter(function() {
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if ($(this).find('ul .tabactive').length === 0) {
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$(this)
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.addClass('submenuhover')
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.find('> a')
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.addClass('tabactive');
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}
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})
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.mouseleave(function() {
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if ($(this).find('ul .tabactive').length === 0) {
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$(this)
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.removeClass('submenuhover')
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.find('> a')
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.removeClass('tabactive');
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}
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});
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$container.children('.clearfloat').remove();
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$container.append($submenu).append("<div class='clearfloat'></div>");
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setTimeout(function () {
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self.resize();
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}, 4);
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}
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MenuResizer.prototype.resize = function () {
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var wmax = this.widthCalculator.call(this.$container);
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var $submenu = this.$container.find('.submenu:last');
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var submenu_w = $submenu.outerWidth(true);
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var $submenu_ul = $submenu.find('ul');
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var $li = this.$container.find('> li');
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var $li2 = $submenu_ul.find('li');
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var more_shown = $li2.length > 0;
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// Calculate the total width used by all the shown tabs
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var total_len = more_shown ? submenu_w : 0;
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var l = $li.length - 1;
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var i;
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for (i = 0; i < l; i++) {
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total_len += $($li[i]).outerWidth(true);
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}
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// Now hide menu elements that don't fit into the menubar
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var hidden = false; // Whether we have hidden any tabs
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while (total_len >= wmax && --l >= 0) { // Process the tabs backwards
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hidden = true;
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var el = $($li[l]);
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var el_width = el.outerWidth(true);
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el.data('width', el_width);
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if (! more_shown) {
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total_len -= el_width;
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el.prependTo($submenu_ul);
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total_len += submenu_w;
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more_shown = true;
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} else {
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total_len -= el_width;
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el.prependTo($submenu_ul);
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}
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}
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// If we didn't hide any tabs, then there might be some space to show some
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if (! hidden) {
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// Show menu elements that do fit into the menubar
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for (i = 0, l = $li2.length; i < l; i++) {
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total_len += $($li2[i]).data('width');
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// item fits or (it is the last item
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// and it would fit if More got removed)
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if (total_len < wmax ||
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(i == $li2.length - 1 && total_len - submenu_w < wmax)
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) {
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$($li2[i]).insertBefore($submenu);
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} else {
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break;
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}
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}
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}
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// Show/hide the "More" tab as needed
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if ($submenu_ul.find('li').length > 0) {
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$submenu.addClass('shown');
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} else {
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$submenu.removeClass('shown');
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}
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if (this.$container.find('> li').length == 1) {
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// If there is only the "More" tab left, then we need
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// to align the submenu to the left edge of the tab
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$submenu_ul.removeClass().addClass('only');
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} else {
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// Otherwise we align the submenu to the right edge of the tab
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$submenu_ul.removeClass().addClass('notonly');
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}
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if ($submenu.find('.tabactive').length) {
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$submenu
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.addClass('active')
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.find('> a')
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.removeClass('tab')
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.addClass('tabactive');
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} else {
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$submenu
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.removeClass('active')
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.find('> a')
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.addClass('tab')
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.removeClass('tabactive');
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}
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};
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MenuResizer.prototype.destroy = function () {
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var $submenu = this.$container.find('li.submenu').removeData();
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$submenu.find('li').appendTo(this.$container);
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$submenu.remove();
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};
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/** Public API */
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var methods = {
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init: function(widthCalculator) {
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return this.each(function () {
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var $this = $(this);
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if (! $this.data('menuResizer')) {
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$this.data(
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'menuResizer',
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new MenuResizer($this, widthCalculator)
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);
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}
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});
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},
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resize: function () {
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return this.each(function () {
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var self = $(this).data('menuResizer');
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if (self) {
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self.resize();
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}
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});
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},
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destroy: function () {
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return this.each(function () {
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var self = $(this).data('menuResizer');
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if (self) {
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self.destroy();
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}
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});
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}
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};
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/** Extend jQuery */
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$.fn.menuResizer = function(method) {
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if (methods[method]) {
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return methods[method].call(this);
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} else if (typeof method === 'function') {
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return methods.init.apply(this, [method]);
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} else {
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$.error('Method ' + method + ' does not exist on jQuery.menuResizer');
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}
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};
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})(jQuery);
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