jquery.contextMenu.js

/*!
 * jQuery contextMenu v@VERSION - Plugin for simple contextMenu handling
 *
 * Version: v@VERSION
 *
 * Authors: Björn Brala (SWIS.nl), Rodney Rehm, Addy Osmani (patches for FF)
 * Web: http://swisnl.github.io/jQuery-contextMenu/
 *
 * Copyright (c) 2011-@YEAR SWIS BV and contributors
 *
 * Licensed under
 *   MIT License http://www.opensource.org/licenses/mit-license
 *   GPL v3 http://opensource.org/licenses/GPL-3.0
 *
 * Date: @DATE
 */

(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as anonymous module.
        define(['jquery'], factory);
    } else if (typeof exports === 'object') {
        // Node / CommonJS
        factory(require('jquery'));
    } else {
        // Browser globals.
        factory(jQuery);
    }
})(function ($) {

    'use strict';

    // TODO: -
    // ARIA stuff: menuitem, menuitemcheckbox und menuitemradio
    // create <menu> structure if $.support[htmlCommand || htmlMenuitem] and !opt.disableNative

    // determine html5 compatibility
    $.support.htmlMenuitem = ('HTMLMenuItemElement' in window);
    $.support.htmlCommand = ('HTMLCommandElement' in window);
    $.support.eventSelectstart = ('onselectstart' in document.documentElement);
    /* // should the need arise, test for css user-select
     $.support.cssUserSelect = (function(){
     var t = false,
     e = document.createElement('div');

     $.each('Moz|Webkit|Khtml|O|ms|Icab|'.split('|'), function(i, prefix) {
     var propCC = prefix + (prefix ? 'U' : 'u') + 'serSelect',
     prop = (prefix ? ('-' + prefix.toLowerCase() + '-') : '') + 'user-select';

     e.style.cssText = prop + ': text;';
     if (e.style[propCC] == 'text') {
     t = true;
     return false;
     }

     return true;
     });

     return t;
     })();
     */

    /* jshint ignore:start */
    if (!$.ui || !$.widget) {
        // duck punch $.cleanData like jQueryUI does to get that remove event
        $.cleanData = (function (orig) {
            return function (elems) {
                var events, elem, i;
                for (i = 0; elems[i] != null; i++) {
                    elem = elems[i];
                    try {
                        // Only trigger remove when necessary to save time
                        events = $._data(elem, 'events');
                        if (events && events.remove) {
                            $(elem).triggerHandler('remove');
                        }

                        // Http://bugs.jquery.com/ticket/8235
                    } catch (e) {}
                }
                orig(elems);
            };
        })($.cleanData);
    }
    /* jshint ignore:end */

    var // currently active contextMenu trigger
        $currentTrigger = null,
    // is contextMenu initialized with at least one menu?
        initialized = false,
    // window handle
        $win = $(window),
    // number of registered menus
        counter = 0,
    // mapping selector to namespace
        namespaces = {},
    // mapping namespace to options
        menus = {},
    // custom command type handlers
        types = {},
    // default values
        defaults = {
            // selector of contextMenu trigger
            selector: null,
            // where to append the menu to
            appendTo: null,
            // method to trigger context menu ["right", "left", "hover"]
            trigger: 'right',
            // hide menu when mouse leaves trigger / menu elements
            autoHide: false,
            // ms to wait before showing a hover-triggered context menu
            delay: 200,
            // flag denoting if a second trigger should simply move (true) or rebuild (false) an open menu
            // as long as the trigger happened on one of the trigger-element's child nodes
            reposition: true,

            // Default classname configuration to be able avoid conflicts in frameworks
            classNames : {

                hover: 'context-menu-hover', // Item hover
                disabled: 'context-menu-disabled', // Item disabled
                visible: 'context-menu-visible', // Item visible
                notSelectable: 'context-menu-not-selectable', // Item not selectable

                icon: 'context-menu-icon',
                iconEdit: 'context-menu-icon-edit',
                iconCut: 'context-menu-icon-cut',
                iconCopy: 'context-menu-icon-copy',
                iconPaste: 'context-menu-icon-paste',
                iconDelete: 'context-menu-icon-delete',
                iconAdd: 'context-menu-icon-add',
                iconQuit: 'context-menu-icon-quit'
            },

            // determine position to show menu at
            determinePosition: function ($menu) {
                // position to the lower middle of the trigger element
                if ($.ui && $.ui.position) {
                    // .position() is provided as a jQuery UI utility
                    // (...and it won't work on hidden elements)
                    $menu.css('display', 'block').position({
                        my: 'center top',
                        at: 'center bottom',
                        of: this,
                        offset: '0 5',
                        collision: 'fit'
                    }).css('display', 'none');
                } else {
                    // determine contextMenu position
                    var offset = this.offset();
                    offset.top += this.outerHeight();
                    offset.left += this.outerWidth() / 2 - $menu.outerWidth() / 2;
                    $menu.css(offset);
                }
            },
            // position menu
            position: function (opt, x, y) {
                var offset;
                // determine contextMenu position
                if (!x && !y) {
                    opt.determinePosition.call(this, opt.$menu);
                    return;
                } else if (x === 'maintain' && y === 'maintain') {
                    // x and y must not be changed (after re-show on command click)
                    offset = opt.$menu.position();
                } else {
                    // x and y are given (by mouse event)
                    offset = {top: y, left: x};
                }

                // correct offset if viewport demands it
                var bottom = $win.scrollTop() + $win.height(),
                    right = $win.scrollLeft() + $win.width(),
                    height = opt.$menu.outerHeight(),
                    width = opt.$menu.outerWidth();

                if (offset.top + height > bottom) {
                    offset.top -= height;
                }

                if (offset.top < 0) {
                    offset.top = 0;
                }

                if (offset.left + width > right) {
                    offset.left -= width;
                }

                if (offset.left < 0) {
                    offset.left = 0;
                }

                opt.$menu.css(offset);
            },
            // position the sub-menu
            positionSubmenu: function ($menu) {
                if ($.ui && $.ui.position) {
                    // .position() is provided as a jQuery UI utility
                    // (...and it won't work on hidden elements)
                    $menu.css('display', 'block').position({
                        my: 'left top',
                        at: 'right top',
                        of: this,
                        collision: 'flipfit fit'
                    }).css('display', '');
                } else {
                    // determine contextMenu position
                    var offset = {
                        top: 0,
                        left: this.outerWidth()
                    };
                    $menu.css(offset);
                }
            },
            // offset to add to zIndex
            zIndex: 1,
            // show hide animation settings
            animation: {
                duration: 50,
                show: 'slideDown',
                hide: 'slideUp'
            },
            // events
            events: {
                show: $.noop,
                hide: $.noop
            },
            // default callback
            callback: null,
            // list of contextMenu items
            items: {}
        },
    // mouse position for hover activation
        hoveract = {
            timer: null,
            pageX: null,
            pageY: null
        },
    // determine zIndex
        zindex = function ($t) {
            var zin = 0,
                $tt = $t;

            while (true) {
                zin = Math.max(zin, parseInt($tt.css('z-index'), 10) || 0);
                $tt = $tt.parent();
                if (!$tt || !$tt.length || 'html body'.indexOf($tt.prop('nodeName').toLowerCase()) > -1) {
                    break;
                }
            }
            return zin;
        },
    // event handlers
        handle = {
            // abort anything
            abortevent: function (e) {
                e.preventDefault();
                e.stopImmediatePropagation();
            },
            // contextmenu show dispatcher
            contextmenu: function (e) {
                var $this = $(this);

                // disable actual context-menu if we are using the right mouse button as the trigger
                if (e.data.trigger === 'right') {
                    e.preventDefault();
                    e.stopImmediatePropagation();
                }

                // abort native-triggered events unless we're triggering on right click
                if ((e.data.trigger !== 'right' && e.data.trigger !== 'demand') && e.originalEvent) {
                    return;
                }

                // Let the current contextmenu decide if it should show or not based on its own trigger settings
                if (e.mouseButton !== undefined && e.data) {
                    if (!(e.data.trigger === 'left' && e.mouseButton === 0) && !(e.data.trigger === 'right' && e.mouseButton === 2)) {
                        // Mouse click is not valid.
                        return;
                    }
                }

                // abort event if menu is visible for this trigger
                if ($this.hasClass('context-menu-active')) {
                    return;
                }

                if (!$this.hasClass('context-menu-disabled')) {
                    // theoretically need to fire a show event at <menu>
                    // http://www.whatwg.org/specs/web-apps/current-work/multipage/interactive-elements.html#context-menus
                    // var evt = jQuery.Event("show", { data: data, pageX: e.pageX, pageY: e.pageY, relatedTarget: this });
                    // e.data.$menu.trigger(evt);

                    $currentTrigger = $this;
                    if (e.data.build) {
                        var built = e.data.build($currentTrigger, e);
                        // abort if build() returned false
                        if (built === false) {
                            return;
                        }

                        // dynamically build menu on invocation
                        e.data = $.extend(true, {}, defaults, e.data, built || {});

                        // abort if there are no items to display
                        if (!e.data.items || $.isEmptyObject(e.data.items)) {
                            // Note: jQuery captures and ignores errors from event handlers
                            if (window.console) {
                                (console.error || console.log).call(console, 'No items specified to show in contextMenu');
                            }

                            throw new Error('No Items specified');
                        }

                        // backreference for custom command type creation
                        e.data.$trigger = $currentTrigger;

                        op.create(e.data);
                    }
                    var showMenu = false;
                    for (var item in e.data.items) {
                        if (e.data.items.hasOwnProperty(item)) {
                            var visible;
                            if ($.isFunction(e.data.items[item].visible)) {
                                visible = e.data.items[item].visible.call($(e.currentTarget), item, e.data);
                            } else if (typeof item.visible !== 'undefined') {
                                visible = e.data.items[item].visible === true;
                            } else {
                                visible = true;
                            }
                            if (visible) {
                                showMenu = true;
                            }
                        }
                    }
                    if (showMenu) {
                        // show menu
		                var menuContainer = (e.data.appendTo === null ? $('body') : $(e.data.appendTo));
		                var srcElement = e.target || e.srcElement || e.originalTarget;
                        if (e.offsetX !== undefined && e.offsetY !== undefined) {
                            op.show.call($this, e.data,
                                         $(srcElement).offset().left - menuContainer.offset().left + e.offsetX,
                                         $(srcElement).offset().top - menuContainer.offset().top + e.offsetY);
                        } else {
                            op.show.call($this, e.data, e.pageX, e.pageY);
                        }
                    }
                }
            },
            // contextMenu left-click trigger
            click: function (e) {
                e.preventDefault();
                e.stopImmediatePropagation();
                $(this).trigger($.Event('contextmenu', {data: e.data, pageX: e.pageX, pageY: e.pageY}));
            },
            // contextMenu right-click trigger
            mousedown: function (e) {
                // register mouse down
                var $this = $(this);

                // hide any previous menus
                if ($currentTrigger && $currentTrigger.length && !$currentTrigger.is($this)) {
                    $currentTrigger.data('contextMenu').$menu.trigger('contextmenu:hide');
                }

                // activate on right click
                if (e.button === 2) {
                    $currentTrigger = $this.data('contextMenuActive', true);
                }
            },
            // contextMenu right-click trigger
            mouseup: function (e) {
                // show menu
                var $this = $(this);
                if ($this.data('contextMenuActive') && $currentTrigger && $currentTrigger.length && $currentTrigger.is($this) && !$this.hasClass('context-menu-disabled')) {
                    e.preventDefault();
                    e.stopImmediatePropagation();
                    $currentTrigger = $this;
                    $this.trigger($.Event('contextmenu', {data: e.data, pageX: e.pageX, pageY: e.pageY}));
                }

                $this.removeData('contextMenuActive');
            },
            // contextMenu hover trigger
            mouseenter: function (e) {
                var $this = $(this),
                    $related = $(e.relatedTarget),
                    $document = $(document);

                // abort if we're coming from a menu
                if ($related.is('.context-menu-list') || $related.closest('.context-menu-list').length) {
                    return;
                }

                // abort if a menu is shown
                if ($currentTrigger && $currentTrigger.length) {
                    return;
                }

                hoveract.pageX = e.pageX;
                hoveract.pageY = e.pageY;
                hoveract.data = e.data;
                $document.on('mousemove.contextMenuShow', handle.mousemove);
                hoveract.timer = setTimeout(function () {
                    hoveract.timer = null;
                    $document.off('mousemove.contextMenuShow');
                    $currentTrigger = $this;
                    $this.trigger($.Event('contextmenu', {
                        data: hoveract.data,
                        pageX: hoveract.pageX,
                        pageY: hoveract.pageY
                    }));
                }, e.data.delay);
            },
            // contextMenu hover trigger
            mousemove: function (e) {
                hoveract.pageX = e.pageX;
                hoveract.pageY = e.pageY;
            },
            // contextMenu hover trigger
            mouseleave: function (e) {
                // abort if we're leaving for a menu
                var $related = $(e.relatedTarget);
                if ($related.is('.context-menu-list') || $related.closest('.context-menu-list').length) {
                    return;
                }

                try {
                    clearTimeout(hoveract.timer);
                } catch (e) {
                }

                hoveract.timer = null;
            },
            // click on layer to hide contextMenu
            layerClick: function (e) {
                var $this = $(this),
                    root = $this.data('contextMenuRoot'),
                    button = e.button,
                    x = e.pageX,
                    y = e.pageY,
                    target,
                    offset;

                e.preventDefault();
                e.stopImmediatePropagation();

                setTimeout(function () {
                    var $window;
                    var triggerAction = ((root.trigger === 'left' && button === 0) || (root.trigger === 'right' && button === 2));

                    // find the element that would've been clicked, wasn't the layer in the way
                    if (document.elementFromPoint && root.$layer) {
                        root.$layer.hide();
                        target = document.elementFromPoint(x - $win.scrollLeft(), y - $win.scrollTop());
                        $(target).trigger('mousedown').trigger('mouseup');
                        root.$layer.show();
                    }

                    if (root.reposition && triggerAction) {
                        if (document.elementFromPoint) {
                            if (root.$trigger.is(target) || root.$trigger.has(target).length) {
                                root.position.call(root.$trigger, root, x, y);
                                return;
                            }
                        } else {
                            offset = root.$trigger.offset();
                            $window = $(window);
                            // while this looks kinda awful, it's the best way to avoid
                            // unnecessarily calculating any positions
                            offset.top += $window.scrollTop();
                            if (offset.top <= e.pageY) {
                                offset.left += $window.scrollLeft();
                                if (offset.left <= e.pageX) {
                                    offset.bottom = offset.top + root.$trigger.outerHeight();
                                    if (offset.bottom >= e.pageY) {
                                        offset.right = offset.left + root.$trigger.outerWidth();
                                        if (offset.right >= e.pageX) {
                                            // reposition
                                            root.position.call(root.$trigger, root, x, y);
                                            return;
                                        }
                                    }
                                }
                            }
                        }
                    }

                    if (target && triggerAction) {
                        root.$trigger.one('contextmenu:hidden', function () {
                            $(target).contextMenu({ x: x, y: y, button: button });
                        });
                    }

                    root.$menu.trigger('contextmenu:hide');
                }, 50);
            },
            // key handled :hover
            keyStop: function (e, opt) {
                if (!opt.isInput) {
                    e.preventDefault();
                }

                e.stopPropagation();
            },
            key: function (e) {

                var opt = {};

                // Only get the data from $currentTrigger if it exists
                if ($currentTrigger) {
                    opt = $currentTrigger.data('contextMenu') || {};
                }
                // If the trigger happen on a element that are above the contextmenu do this
                if (opt.zIndex === undefined) {
                    opt.zIndex = 0;
				}
                var targetZIndex = 0;
                var getZIndexOfTriggerTarget = function (target) {
					if (target.style.zIndex !== '') {
						targetZIndex = target.style.zIndex;
					} else {
						if (target.offsetParent !== null && target.offsetParent !== undefined) {
							getZIndexOfTriggerTarget(target.offsetParent);
						} 
						else if (target.parentElement !== null && target.parentElement !== undefined) {
							getZIndexOfTriggerTarget(target.parentElement);
						}
					}
                };
                getZIndexOfTriggerTarget(e.target);
                // If targetZIndex is heigher then opt.zIndex dont progress any futher.
                // This is used to make sure that if you are using a dialog with a input / textarea / contenteditable div
                // and its above the contextmenu it wont steal keys events
                if (targetZIndex > opt.zIndex) {
                    return;
				}
                switch (e.keyCode) {
                    case 9:
                    case 38: // up
                        handle.keyStop(e, opt);
                        // if keyCode is [38 (up)] or [9 (tab) with shift]
                        if (opt.isInput) {
                            if (e.keyCode === 9 && e.shiftKey) {
                                e.preventDefault();
                                if(opt.$selected) {
                                    opt.$selected.find('input, textarea, select').blur();
                                }
                                opt.$menu.trigger('prevcommand');
                                return;
                            } else if (e.keyCode === 38 && opt.$selected.find('input, textarea, select').prop('type') === 'checkbox') {
                                // checkboxes don't capture this key
                                e.preventDefault();
                                return;
                            }
                        } else if (e.keyCode !== 9 || e.shiftKey) {
                            opt.$menu.trigger('prevcommand');
                            return;
                        }
                        break;
                    // omitting break;
                    // case 9: // tab - reached through omitted break;
                    case 40: // down
                        handle.keyStop(e, opt);
                        if (opt.isInput) {
                            if (e.keyCode === 9) {
                                e.preventDefault();
                                if(opt.$selected) {
                                    opt.$selected.find('input, textarea, select').blur();
                                }
                                opt.$menu.trigger('nextcommand');
                                return;
                            } else if (e.keyCode === 40 && opt.$selected.find('input, textarea, select').prop('type') === 'checkbox') {
                                // checkboxes don't capture this key
                                e.preventDefault();
                                return;
                            }
                        } else {
                            opt.$menu.trigger('nextcommand');
                            return;
                        }
                        break;

                    case 37: // left
                        handle.keyStop(e, opt);
                        if (opt.isInput || !opt.$selected || !opt.$selected.length) {
                            break;
                        }

                        if (!opt.$selected.parent().hasClass('context-menu-root')) {
                            var $parent = opt.$selected.parent().parent();
                            opt.$selected.trigger('contextmenu:blur');
                            opt.$selected = $parent;
                            return;
                        }
                        break;

                    case 39: // right
                        handle.keyStop(e, opt);
                        if (opt.isInput || !opt.$selected || !opt.$selected.length) {
                            break;
                        }

                        var itemdata = opt.$selected.data('contextMenu') || {};
                        if (itemdata.$menu && opt.$selected.hasClass('context-menu-submenu')) {
                            opt.$selected = null;
                            itemdata.$selected = null;
                            itemdata.$menu.trigger('nextcommand');
                            return;
                        }
                        break;

                    case 35: // end
                    case 36: // home
                        if (opt.$selected && opt.$selected.find('input, textarea, select').length) {
                            return;
                        } else {
                            (opt.$selected && opt.$selected.parent() || opt.$menu)
                                .children(':not(.' + opt.classNames.disabled + ', .' + opt.classNames.notSelectable + ')')[e.keyCode === 36 ? 'first' : 'last']()
                                .trigger('contextmenu:focus');
                            e.preventDefault();
                            return;
                        }
                        break;

                    case 13: // enter
                        handle.keyStop(e, opt);
                        if (opt.isInput) {
                            if (opt.$selected && !opt.$selected.is('textarea, select')) {
                                e.preventDefault();
                                return;
                            }
                            break;
                        }
                        if (typeof opt.$selected !== 'undefined' && opt.$selected !== null) {
                            opt.$selected.trigger('mouseup');
                        }
                        return;

                    case 32: // space
                    case 33: // page up
                    case 34: // page down
                        // prevent browser from scrolling down while menu is visible
                        handle.keyStop(e, opt);
                        return;

                    case 27: // esc
                        handle.keyStop(e, opt);
                        opt.$menu.trigger('contextmenu:hide');
                        return;

                    default: // 0-9, a-z
                        var k = (String.fromCharCode(e.keyCode)).toUpperCase();
                        if (opt.accesskeys && opt.accesskeys[k]) {
                            // according to the specs accesskeys must be invoked immediately
                            opt.accesskeys[k].$node.trigger(opt.accesskeys[k].$menu ? 'contextmenu:focus' : 'mouseup');
                            return;
                        }
                        break;
                }
                // pass event to selected item,
                // stop propagation to avoid endless recursion
                e.stopPropagation();
                if (typeof opt.$selected !== 'undefined' && opt.$selected !== null) {
                    opt.$selected.trigger(e);
                }
            },
            // select previous possible command in menu
            prevItem: function (e) {
                e.stopPropagation();
                var opt = $(this).data('contextMenu') || {};
                var root = $(this).data('contextMenuRoot') || {};

                // obtain currently selected menu
                if (opt.$selected) {
                    var $s = opt.$selected;
                    opt = opt.$selected.parent().data('contextMenu') || {};
                    opt.$selected = $s;
                }

                var $children = opt.$menu.children(),
                    $prev = !opt.$selected || !opt.$selected.prev().length ? $children.last() : opt.$selected.prev(),
                    $round = $prev;

                // skip disabled
                while ($prev.hasClass(root.classNames.disabled) || $prev.hasClass(root.classNames.notSelectable)) {
                    if ($prev.prev().length) {
                        $prev = $prev.prev();
                    } else {
                        $prev = $children.last();
                    }
                    if ($prev.is($round)) {
                        // break endless loop
                        return;
                    }
                }

                // leave current
                if (opt.$selected) {
                    handle.itemMouseleave.call(opt.$selected.get(0), e);
                }

                // activate next
                handle.itemMouseenter.call($prev.get(0), e);

                // focus input
                var $input = $prev.find('input, textarea, select');
                if ($input.length) {
                    $input.focus();
                }
            },
            // select next possible command in menu
            nextItem: function (e) {
                e.stopPropagation();
                var opt = $(this).data('contextMenu') || {};
                var root = $(this).data('contextMenuRoot') || {};

                // obtain currently selected menu
                if (opt.$selected) {
                    var $s = opt.$selected;
                    opt = opt.$selected.parent().data('contextMenu') || {};
                    opt.$selected = $s;
                }

                var $children = opt.$menu.children(),
                    $next = !opt.$selected || !opt.$selected.next().length ? $children.first() : opt.$selected.next(),
                    $round = $next;

                // skip disabled
                while ($next.hasClass(root.classNames.disabled) || $next.hasClass(root.classNames.notSelectable)) {
                    if ($next.next().length) {
                        $next = $next.next();
                    } else {
                        $next = $children.first();
                    }
                    if ($next.is($round)) {
                        // break endless loop
                        return;
                    }
                }

                // leave current
                if (opt.$selected) {
                    handle.itemMouseleave.call(opt.$selected.get(0), e);
                }

                // activate next
                handle.itemMouseenter.call($next.get(0), e);

                // focus input
                var $input = $next.find('input, textarea, select');
                if ($input.length) {
                    $input.focus();
                }
            },
            // flag that we're inside an input so the key handler can act accordingly
            focusInput: function () {
                var $this = $(this).closest('.context-menu-item'),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                root.$selected = opt.$selected = $this;
                root.isInput = opt.isInput = true;
            },
            // flag that we're inside an input so the key handler can act accordingly
            blurInput: function () {
                var $this = $(this).closest('.context-menu-item'),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                root.isInput = opt.isInput = false;
            },
            // :hover on menu
            menuMouseenter: function () {
                var root = $(this).data().contextMenuRoot;
                root.hovering = true;
            },
            // :hover on menu
            menuMouseleave: function (e) {
                var root = $(this).data().contextMenuRoot;
                if (root.$layer && root.$layer.is(e.relatedTarget)) {
                    root.hovering = false;
                }
            },
            // :hover done manually so key handling is possible
            itemMouseenter: function (e) {
                var $this = $(this),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                root.hovering = true;

                // abort if we're re-entering
                if (e && root.$layer && root.$layer.is(e.relatedTarget)) {
                    e.preventDefault();
                    e.stopImmediatePropagation();
                }

                // make sure only one item is selected
                (opt.$menu ? opt : root).$menu
                    .children('.hover').trigger('contextmenu:blur');

                if ($this.hasClass(root.classNames.disabled) || $this.hasClass(root.classNames.notSelectable)) {
                    opt.$selected = null;
                    return;
                }

                $this.trigger('contextmenu:focus');
            },
            // :hover done manually so key handling is possible
            itemMouseleave: function (e) {
                var $this = $(this),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                if (root !== opt && root.$layer && root.$layer.is(e.relatedTarget)) {
                    if (typeof root.$selected !== 'undefined' && root.$selected !== null) {
                        root.$selected.trigger('contextmenu:blur');
                    }
                    e.preventDefault();
                    e.stopImmediatePropagation();
                    root.$selected = opt.$selected = opt.$node;
                    return;
                }

                $this.trigger('contextmenu:blur');
            },
            // contextMenu item click
            itemClick: function (e) {
                var $this = $(this),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot,
                    key = data.contextMenuKey,
                    callback;

                // abort if the key is unknown or disabled or is a menu
                if (!opt.items[key] || $this.is('.' + root.classNames.disabled + ', .context-menu-submenu, .context-menu-separator, .' + root.classNames.notSelectable)) {
                    return;
                }

                e.preventDefault();
                e.stopImmediatePropagation();

                if ($.isFunction(root.callbacks[key]) && Object.prototype.hasOwnProperty.call(root.callbacks, key)) {
                    // item-specific callback
                    callback = root.callbacks[key];
                } else if ($.isFunction(root.callback)) {
                    // default callback
                    callback = root.callback;
                } else {
                    // no callback, no action
                    return;
                }

                // hide menu if callback doesn't stop that
                if (callback.call(root.$trigger, key, root) !== false) {
                    root.$menu.trigger('contextmenu:hide');
                } else if (root.$menu.parent().length) {
                    op.update.call(root.$trigger, root);
                }
            },
            // ignore click events on input elements
            inputClick: function (e) {
                e.stopImmediatePropagation();
            },
            // hide <menu>
            hideMenu: function (e, data) {
                var root = $(this).data('contextMenuRoot');
                op.hide.call(root.$trigger, root, data && data.force);
            },
            // focus <command>
            focusItem: function (e) {
                e.stopPropagation();
                var $this = $(this),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                $this
                    .addClass([root.classNames.hover, root.classNames.visible].join(' '))
                    .siblings()
                    .removeClass(root.classNames.visible)
                    .filter(root.classNames.hover)
                    .trigger('contextmenu:blur');

                // remember selected
                opt.$selected = root.$selected = $this;

                // position sub-menu - do after show so dumb $.ui.position can keep up
                if (opt.$node) {
                    root.positionSubmenu.call(opt.$node, opt.$menu);
                }
            },
            // blur <command>
            blurItem: function (e) {
                e.stopPropagation();
                var $this = $(this),
                    data = $this.data(),
                    opt = data.contextMenu,
                    root = data.contextMenuRoot;

                if (opt.autoHide) { // for tablets and touch screens this needs to remain
                    $this.removeClass(root.classNames.visible);
                }
                $this.removeClass(root.classNames.hover);
                opt.$selected = null;
            }
        },
    // operations
        op = {
            show: function (opt, x, y) {
                var $trigger = $(this),
                    css = {};

                // hide any open menus
                $('#context-menu-layer').trigger('mousedown');

                // backreference for callbacks
                opt.$trigger = $trigger;

                // show event
                if (opt.events.show.call($trigger, opt) === false) {
                    $currentTrigger = null;
                    return;
                }

                // create or update context menu
                op.update.call($trigger, opt);

                // position menu
                opt.position.call($trigger, opt, x, y);

                // make sure we're in front
                if (opt.zIndex) {
                  var additionalZValue = opt.zIndex;
                  // If opt.zIndex is a function, call the function to get the right zIndex.
                  if (typeof opt.zIndex === 'function') {
                      additionalZValue = opt.zIndex.call($trigger, opt);
                  }
                  css.zIndex = zindex($trigger) + additionalZValue;
                }

                // add layer
                op.layer.call(opt.$menu, opt, css.zIndex);

                // adjust sub-menu zIndexes
                opt.$menu.find('ul').css('zIndex', css.zIndex + 1);

                // position and show context menu
                opt.$menu.css(css)[opt.animation.show](opt.animation.duration, function () {
                    $trigger.trigger('contextmenu:visible');
                });
                // make options available and set state
                $trigger
                    .data('contextMenu', opt)
                    .addClass('context-menu-active');

                // register key handler
                $(document).off('keydown.contextMenu').on('keydown.contextMenu', handle.key);
                // register autoHide handler
                if (opt.autoHide) {
                    // mouse position handler
                    $(document).on('mousemove.contextMenuAutoHide', function (e) {
                        // need to capture the offset on mousemove,
                        // since the page might've been scrolled since activation
                        var pos = $trigger.offset();
                        pos.right = pos.left + $trigger.outerWidth();
                        pos.bottom = pos.top + $trigger.outerHeight();

                        if (opt.$layer && !opt.hovering && (!(e.pageX >= pos.left && e.pageX <= pos.right) || !(e.pageY >= pos.top && e.pageY <= pos.bottom))) {
                            // if mouse in menu...
                            opt.$menu.trigger('contextmenu:hide');
                        }
                    });
                }
            },
            hide: function (opt, force) {
                var $trigger = $(this);
                if (!opt) {
                    opt = $trigger.data('contextMenu') || {};
                }

                // hide event
                if (!force && opt.events && opt.events.hide.call($trigger, opt) === false) {
                    return;
                }

                // remove options and revert state
                $trigger
                    .removeData('contextMenu')
                    .removeClass('context-menu-active');

                if (opt.$layer) {
                    // keep layer for a bit so the contextmenu event can be aborted properly by opera
                    setTimeout((function ($layer) {
                        return function () {
                            $layer.remove();
                        };
                    })(opt.$layer), 10);

                    try {
                        delete opt.$layer;
                    } catch (e) {
                        opt.$layer = null;
                    }
                }

                // remove handle
                $currentTrigger = null;
                // remove selected
                opt.$menu.find('.' + opt.classNames.hover).trigger('contextmenu:blur');
                opt.$selected = null;
                // unregister key and mouse handlers
                // $(document).off('.contextMenuAutoHide keydown.contextMenu'); // http://bugs.jquery.com/ticket/10705
                $(document).off('.contextMenuAutoHide').off('keydown.contextMenu');
                // hide menu
                if(opt.$menu){
                    opt.$menu[opt.animation.hide](opt.animation.duration, function () {
                        // tear down dynamically built menu after animation is completed.
                        if (opt.build) {
                            opt.$menu.remove();
                            $.each(opt, function (key) {
                                switch (key) {
                                    case 'ns':
                                    case 'selector':
                                    case 'build':
                                    case 'trigger':
                                        return true;

                                    default:
                                        opt[key] = undefined;
                                        try {
                                            delete opt[key];
                                        } catch (e) {
                                        }
                                        return true;
                                }
                            });
                        }

                        setTimeout(function () {
                            $trigger.trigger('contextmenu:hidden');
                        }, 10);
                    });
                }
            },
            create: function (opt, root) {
                if (root === undefined) {
                    root = opt;
                }
                // create contextMenu
                opt.$menu = $('<ul class="context-menu-list"></ul>').addClass(opt.className || '').data({
                    'contextMenu': opt,
                    'contextMenuRoot': root
                });

                $.each(['callbacks', 'commands', 'inputs'], function (i, k) {
                    opt[k] = {};
                    if (!root[k]) {
                        root[k] = {};
                    }
                });

                if(!root.accesskeys){
                    root.accesskeys = {};
                }

                function createNameNode(item) {
                    var $name = $('<span></span>');
                    if (item._accesskey) {
                        if (item._beforeAccesskey) {
                            $name.append(document.createTextNode(item._beforeAccesskey));
                        }
                        $('<span></span>')
                            .addClass('context-menu-accesskey')
                            .text(item._accesskey)
                            .appendTo($name);
                        if (item._afterAccesskey) {
                            $name.append(document.createTextNode(item._afterAccesskey));
                        }
                    } else {
                        $name.text(item.name);
                    }
                    return $name;
                }

                // create contextMenu items
                $.each(opt.items, function (key, item) {
                    var $t = $('<li class="context-menu-item"></li>').addClass(item.className || ''),
                        $label = null,
                        $input = null;

                    // iOS needs to see a click-event bound to an element to actually
                    // have the TouchEvents infrastructure trigger the click event
                    $t.on('click', $.noop);

                    // Make old school string seperator a real item so checks wont be
                    // akward later.
                    if (typeof item === 'string') {
                        item = { type : 'cm_seperator' };
                    }

                    item.$node = $t.data({
                        'contextMenu': opt,
                        'contextMenuRoot': root,
                        'contextMenuKey': key
                    });

                    // register accesskey
                    // NOTE: the accesskey attribute should be applicable to any element, but Safari5 and Chrome13 still can't do that
                    if (typeof item.accesskey !== 'undefined') {
                        var aks = splitAccesskey(item.accesskey);
                        for (var i = 0, ak; ak = aks[i]; i++) {
                            if (!root.accesskeys[ak]) {
                                root.accesskeys[ak] = item;
                                var matched = item.name.match(new RegExp('^(.*?)(' + ak + ')(.*)$', 'i'));
                                if (matched) {
                                    item._beforeAccesskey = matched[1];
                                    item._accesskey = matched[2];
                                    item._afterAccesskey = matched[3];
                                }
                                break;
                            }
                        }
                    }

                    if (item.type && types[item.type]) {
                        // run custom type handler
                        types[item.type].call($t, item, opt, root);
                        // register commands
                        $.each([opt, root], function (i, k) {
                            k.commands[key] = item;
                            if ($.isFunction(item.callback)) {
                                k.callbacks[key] = item.callback;
                            }
                        });
                    } else {
                        // add label for input
                        if (item.type === 'cm_seperator') {
                            $t.addClass('context-menu-separator ' + root.classNames.notSelectable);
                        } else if (item.type === 'html') {
                            $t.addClass('context-menu-html ' + root.classNames.notSelectable);
                        } else if (item.type) {
                            $label = $('<label></label>').appendTo($t);
                            createNameNode(item).appendTo($label);

                            $t.addClass('context-menu-input');
                            opt.hasTypes = true;
                            $.each([opt, root], function (i, k) {
                                k.commands[key] = item;
                                k.inputs[key] = item;
                            });
                        } else if (item.items) {
                            item.type = 'sub';
                        }

                        switch (item.type) {
                            case 'cm_seperator':
                                break;

                            case 'text':
                                $input = $('<input type="text" value="1" name="" value="">')
                                    .attr('name', 'context-menu-input-' + key)
                                    .val(item.value || '')
                                    .appendTo($label);
                                break;

                            case 'textarea':
                                $input = $('<textarea name=""></textarea>')
                                    .attr('name', 'context-menu-input-' + key)
                                    .val(item.value || '')
                                    .appendTo($label);

                                if (item.height) {
                                    $input.height(item.height);
                                }
                                break;

                            case 'checkbox':
                                $input = $('<input type="checkbox" value="1" name="" value="">')
                                    .attr('name', 'context-menu-input-' + key)
                                    .val(item.value || '')
                                    .prop('checked', !!item.selected)
                                    .prependTo($label);
                                break;

                            case 'radio':
                                $input = $('<input type="radio" value="1" name="" value="">')
                                    .attr('name', 'context-menu-input-' + item.radio)
                                    .val(item.value || '')
                                    .prop('checked', !!item.selected)
                                    .prependTo($label);
                                break;

                            case 'select':
                                $input = $('<select name="">')
                                    .attr('name', 'context-menu-input-' + key)
                                    .appendTo($label);
                                if (item.options) {
                                    $.each(item.options, function (value, text) {
                                        $('<option></option>').val(value).text(text).appendTo($input);
                                    });
                                    $input.val(item.selected);
                                }
                                break;

                            case 'sub':
                                createNameNode(item).appendTo($t);

                                item.appendTo = item.$node;
                                op.create(item, root);
                                $t.data('contextMenu', item).addClass('context-menu-submenu');
                                item.callback = null;
                                break;

                            case 'html':
                                $(item.html).appendTo($t);
                                break;

                            default:
                                $.each([opt, root], function (i, k) {
                                    k.commands[key] = item;
                                    if ($.isFunction(item.callback)) {
                                        k.callbacks[key] = item.callback;
                                    }
                                });
                                createNameNode(item).appendTo($t);
                                break;
                        }

                        // disable key listener in <input>
                        if (item.type && item.type !== 'sub' && item.type !== 'html' && item.type !== 'cm_seperator') {
                            $input
                                .on('focus', handle.focusInput)
                                .on('blur', handle.blurInput);

                            if (item.events) {
                                $input.on(item.events, opt);
                            }
                        }

                        // add icons
                        if (item.icon) {
                            if ($.isFunction(item.icon)) {
                                item._icon = item.icon.call(this, this, $t, key, item);
                            } else {
                                item._icon = root.classNames.icon + ' ' + root.classNames.icon + '-' + item.icon;
                            }
                            $t.addClass(item._icon);
                        }
                    }

                    // cache contained elements
                    item.$input = $input;
                    item.$label = $label;

                    // attach item to menu
                    $t.appendTo(opt.$menu);

                    // Disable text selection
                    if (!opt.hasTypes && $.support.eventSelectstart) {
                        // browsers support user-select: none,
                        // IE has a special event for text-selection
                        // browsers supporting neither will not be preventing text-selection
                        $t.on('selectstart.disableTextSelect', handle.abortevent);
                    }
                });
                // attach contextMenu to <body> (to bypass any possible overflow:hidden issues on parents of the trigger element)
                if (!opt.$node) {
                    opt.$menu.css('display', 'none').addClass('context-menu-root');
                }
                opt.$menu.appendTo(opt.appendTo || document.body);
            },
            resize: function ($menu, nested) {
                // determine widths of submenus, as CSS won't grow them automatically
                // position:absolute within position:absolute; min-width:100; max-width:200; results in width: 100;
                // kinda sucks hard...

                // determine width of absolutely positioned element
                $menu.css({position: 'absolute', display: 'block'});
                // don't apply yet, because that would break nested elements' widths
                $menu.data('width', Math.ceil($menu.outerWidth()));
                // reset styles so they allow nested elements to grow/shrink naturally
                $menu.css({
                    position: 'static',
                    minWidth: '0px',
                    maxWidth: '100000px'
                });
                // identify width of nested menus
                $menu.find('> li > ul').each(function () {
                    op.resize($(this), true);
                });
                // reset and apply changes in the end because nested
                // elements' widths wouldn't be calculatable otherwise
                if (!nested) {
                    $menu.find('ul').addBack().css({
                        position: '',
                        display: '',
                        minWidth: '',
                        maxWidth: ''
                    }).width(function () {
                        return $(this).data('width');
                    });
                }
            },
            update: function (opt, root) {
                var $trigger = this;
                if (root === undefined) {
                    root = opt;
                    op.resize(opt.$menu);
                }
                // re-check disabled for each item
                opt.$menu.children().each(function () {
                    var $item = $(this),
                        key = $item.data('contextMenuKey'),
                        item = opt.items[key],
                        disabled = ($.isFunction(item.disabled) && item.disabled.call($trigger, key, root)) || item.disabled === true,
                        visible;
                    if ($.isFunction(item.visible)) {
                        visible = item.visible.call($trigger, key, root);
                    } else if (typeof item.visible !== 'undefined') {
                        visible = item.visible === true;
                    } else {
                        visible = true;
                    }
                    $item[visible ? 'show' : 'hide']();

                    // dis- / enable item
                    $item[disabled ? 'addClass' : 'removeClass'](root.classNames.disabled);

                    if ($.isFunction(item.icon)) {
                        $item.removeClass(item._icon);
                        item._icon = item.icon.call(this, $trigger, $item, key, item);
                        $item.addClass(item._icon);
                    }

                    if (item.type) {
                        // dis- / enable input elements
                        $item.find('input, select, textarea').prop('disabled', disabled);

                        // update input states
                        switch (item.type) {
                            case 'text':
                            case 'textarea':
                                item.$input.val(item.value || '');
                                break;

                            case 'checkbox':
                            case 'radio':
                                item.$input.val(item.value || '').prop('checked', !!item.selected);
                                break;

                            case 'select':
                                item.$input.val(item.selected || '');
                                break;
                        }
                    }

                    if (item.$menu) {
                        // update sub-menu
                        op.update.call($trigger, item, root);
                    }
                });
            },
            layer: function (opt, zIndex) {
                // add transparent layer for click area
                // filter and background for Internet Explorer, Issue #23
                var $layer = opt.$layer = $('<div id="context-menu-layer" style="position:fixed; z-index:' + zIndex + '; top:0; left:0; opacity: 0; filter: alpha(opacity=0); background-color: #000;"></div>')
                    .css({height: $win.height(), width: $win.width(), display: 'block'})
                    .data('contextMenuRoot', opt)
                    .insertBefore(this)
                    .on('contextmenu', handle.abortevent)
                    .on('mousedown', handle.layerClick);

                // IE6 doesn't know position:fixed;
                if (document.body.style.maxWidth === undefined) { // IE6 doesn't support maxWidth
                    $layer.css({
                        'position': 'absolute',
                        'height': $(document).height()
                    });
                }

                return $layer;
            }
        };

    // split accesskey according to http://www.whatwg.org/specs/web-apps/current-work/multipage/editing.html#assigned-access-key
    function splitAccesskey(val) {
        var t = val.split(/\s+/),
            keys = [];

        for (var i = 0, k; k = t[i]; i++) {
            k = k.charAt(0).toUpperCase(); // first character only
            // theoretically non-accessible characters should be ignored, but different systems, different keyboard layouts, ... screw it.
            // a map to look up already used access keys would be nice
            keys.push(k);
        }

        return keys;
    }

// handle contextMenu triggers
    $.fn.contextMenu = function (operation) {
        var $t = this, $o = operation;
        if (this.length > 0) {  // this is not a build on demand menu
            if (operation === undefined) {
                this.first().trigger('contextmenu');
            } else if (operation.x !== undefined && operation.y !== undefined) {
                this.first().trigger($.Event('contextmenu', { pageX: operation.x, pageY: operation.y, mouseButton: operation.button }));
            } else if (operation === 'hide') {
                var $menu = this.first().data('contextMenu') ? this.first().data('contextMenu').$menu : null;
                if($menu){
                    $menu.trigger('contextmenu:hide');
                }
            } else if (operation === 'destroy') {
                $.contextMenu('destroy', {context: this});
            } else if ($.isPlainObject(operation)) {
                operation.context = this;
                $.contextMenu('create', operation);
            } else if (operation) {
                this.removeClass('context-menu-disabled');
            } else if (!operation) {
                this.addClass('context-menu-disabled');
            }
        } else {
            $.each(menus, function () {
                if (this.selector === $t.selector) {
                    $o.data = this;

                    $.extend($o.data, {trigger: 'demand'});
                }
            });

            handle.contextmenu.call($o.target, $o);
        }

        return this;
    };

    // manage contextMenu instances
    $.contextMenu = function (operation, options) {
        if (typeof operation !== 'string') {
            options = operation;
            operation = 'create';
        }

        if (typeof options === 'string') {
            options = {selector: options};
        } else if (options === undefined) {
            options = {};
        }

        // merge with default options
        var o = $.extend(true, {}, defaults, options || {});
        var $document = $(document);
        var $context = $document;
        var _hasContext = false;

        if (!o.context || !o.context.length) {
            o.context = document;
        } else {
            // you never know what they throw at you...
            $context = $(o.context).first();
            o.context = $context.get(0);
            _hasContext = o.context !== document;
        }

        switch (operation) {
            case 'create':
                // no selector no joy
                if (!o.selector) {
                    throw new Error('No selector specified');
                }
                // make sure internal classes are not bound to
                if (o.selector.match(/.context-menu-(list|item|input)($|\s)/)) {
                    throw new Error('Cannot bind to selector "' + o.selector + '" as it contains a reserved className');
                }
                if (!o.build && (!o.items || $.isEmptyObject(o.items))) {
                    throw new Error('No Items specified');
                }
                counter++;
                o.ns = '.contextMenu' + counter;
                if (!_hasContext) {
                    namespaces[o.selector] = o.ns;
                }
                menus[o.ns] = o;

                // default to right click
                if (!o.trigger) {
                    o.trigger = 'right';
                }

                if (!initialized) {
                    // make sure item click is registered first
                    $document
                        .on({
                            'contextmenu:hide.contextMenu': handle.hideMenu,
                            'prevcommand.contextMenu': handle.prevItem,
                            'nextcommand.contextMenu': handle.nextItem,
                            'contextmenu.contextMenu': handle.abortevent,
                            'mouseenter.contextMenu': handle.menuMouseenter,
                            'mouseleave.contextMenu': handle.menuMouseleave
                        }, '.context-menu-list')
                        .on('mouseup.contextMenu', '.context-menu-input', handle.inputClick)
                        .on({
                            'mouseup.contextMenu': handle.itemClick,
                            'contextmenu:focus.contextMenu': handle.focusItem,
                            'contextmenu:blur.contextMenu': handle.blurItem,
                            'contextmenu.contextMenu': handle.abortevent,
                            'mouseenter.contextMenu': handle.itemMouseenter,
                            'mouseleave.contextMenu': handle.itemMouseleave
                        }, '.context-menu-item');

                    initialized = true;
                }

                // engage native contextmenu event
                $context
                    .on('contextmenu' + o.ns, o.selector, o, handle.contextmenu);

                if (_hasContext) {
                    // add remove hook, just in case
                    $context.on('remove' + o.ns, function () {
                        $(this).contextMenu('destroy');
                    });
                }

                switch (o.trigger) {
                    case 'hover':
                        $context
                            .on('mouseenter' + o.ns, o.selector, o, handle.mouseenter)
                            .on('mouseleave' + o.ns, o.selector, o, handle.mouseleave);
                        break;

                    case 'left':
                        $context.on('click' + o.ns, o.selector, o, handle.click);
                        break;
                    /*
                     default:
                     // http://www.quirksmode.org/dom/events/contextmenu.html
                     $document
                     .on('mousedown' + o.ns, o.selector, o, handle.mousedown)
                     .on('mouseup' + o.ns, o.selector, o, handle.mouseup);
                     break;
                     */
                }

                // create menu
                if (!o.build) {
                    op.create(o);
                }
                break;

            case 'destroy':
                var $visibleMenu;
                if (_hasContext) {
                    // get proper options
                    var context = o.context;
                    $.each(menus, function (ns, o) {
                        if (o.context !== context) {
                            return true;
                        }

                        $visibleMenu = $('.context-menu-list').filter(':visible');
                        if ($visibleMenu.length && $visibleMenu.data().contextMenuRoot.$trigger.is($(o.context).find(o.selector))) {
                            $visibleMenu.trigger('contextmenu:hide', {force: true});
                        }

                        try {
                            if (menus[o.ns].$menu) {
                                menus[o.ns].$menu.remove();
                            }

                            delete menus[o.ns];
                        } catch (e) {
                            menus[o.ns] = null;
                        }

                        $(o.context).off(o.ns);

                        return true;
                    });
                } else if (!o.selector) {
                    $document.off('.contextMenu .contextMenuAutoHide');
                    $.each(menus, function (ns, o) {
                        $(o.context).off(o.ns);
                    });

                    namespaces = {};
                    menus = {};
                    counter = 0;
                    initialized = false;

                    $('#context-menu-layer, .context-menu-list').remove();
                } else if (namespaces[o.selector]) {
                    $visibleMenu = $('.context-menu-list').filter(':visible');
                    if ($visibleMenu.length && $visibleMenu.data().contextMenuRoot.$trigger.is(o.selector)) {
                        $visibleMenu.trigger('contextmenu:hide', {force: true});
                    }

                    try {
                        if (menus[namespaces[o.selector]].$menu) {
                            menus[namespaces[o.selector]].$menu.remove();
                        }

                        delete menus[namespaces[o.selector]];
                    } catch (e) {
                        menus[namespaces[o.selector]] = null;
                    }

                    $document.off(namespaces[o.selector]);
                }
                break;

            case 'html5':
                // if <command> or <menuitem> are not handled by the browser,
                // or options was a bool true,
                // initialize $.contextMenu for them
                if ((!$.support.htmlCommand && !$.support.htmlMenuitem) || (typeof options === 'boolean' && options)) {
                    $('menu[type="context"]').each(function () {
                        if (this.id) {
                            $.contextMenu({
                                selector: '[contextmenu=' + this.id + ']',
                                items: $.contextMenu.fromMenu(this)
                            });
                        }
                    }).css('display', 'none');
                }
                break;

            default:
                throw new Error('Unknown operation "' + operation + '"');
        }

        return this;
    };

// import values into <input> commands
    $.contextMenu.setInputValues = function (opt, data) {
        if (data === undefined) {
            data = {};
        }

        $.each(opt.inputs, function (key, item) {
            switch (item.type) {
                case 'text':
                case 'textarea':
                    item.value = data[key] || '';
                    break;

                case 'checkbox':
                    item.selected = data[key] ? true : false;
                    break;

                case 'radio':
                    item.selected = (data[item.radio] || '') === item.value;
                    break;

                case 'select':
                    item.selected = data[key] || '';
                    break;
            }
        });
    };

// export values from <input> commands
    $.contextMenu.getInputValues = function (opt, data) {
        if (data === undefined) {
            data = {};
        }

        $.each(opt.inputs, function (key, item) {
            switch (item.type) {
                case 'text':
                case 'textarea':
                case 'select':
                    data[key] = item.$input.val();
                    break;

                case 'checkbox':
                    data[key] = item.$input.prop('checked');
                    break;

                case 'radio':
                    if (item.$input.prop('checked')) {
                        data[item.radio] = item.value;
                    }
                    break;
            }
        });

        return data;
    };

// find <label for="xyz">
    function inputLabel(node) {
        return (node.id && $('label[for="' + node.id + '"]').val()) || node.name;
    }

// convert <menu> to items object
    function menuChildren(items, $children, counter) {
        if (!counter) {
            counter = 0;
        }

        $children.each(function () {
            var $node = $(this),
                node = this,
                nodeName = this.nodeName.toLowerCase(),
                label,
                item;

            // extract <label><input>
            if (nodeName === 'label' && $node.find('input, textarea, select').length) {
                label = $node.text();
                $node = $node.children().first();
                node = $node.get(0);
                nodeName = node.nodeName.toLowerCase();
            }

            /*
             * <menu> accepts flow-content as children. that means <embed>, <canvas> and such are valid menu items.
             * Not being the sadistic kind, $.contextMenu only accepts:
             * <command>, <menuitem>, <hr>, <span>, <p> <input [text, radio, checkbox]>, <textarea>, <select> and of course <menu>.
             * Everything else will be imported as an html node, which is not interfaced with contextMenu.
             */

            // http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#concept-command
            switch (nodeName) {
                // http://www.whatwg.org/specs/web-apps/current-work/multipage/interactive-elements.html#the-menu-element
                case 'menu':
                    item = {name: $node.attr('label'), items: {}};
                    counter = menuChildren(item.items, $node.children(), counter);
                    break;

                // http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#using-the-a-element-to-define-a-command
                case 'a':
                // http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#using-the-button-element-to-define-a-command
                case 'button':
                    item = {
                        name: $node.text(),
                        disabled: !!$node.attr('disabled'),
                        callback: (function () {
                            return function () {
                                $node.click();
                            };
                        })()
                    };
                    break;

                // http://www.whatwg.org/specs/web-apps/current-work/multipage/commands.html#using-the-command-element-to-define-a-command

                case 'menuitem':
                case 'command':
                    switch ($node.attr('type')) {
                        case undefined:
                        case 'command':
                        case 'menuitem':
                            item = {
                                name: $node.attr('label'),
                                disabled: !!$node.attr('disabled'),
                                icon: $node.attr('icon'),
                                callback: (function () {
                                    return function () {
                                        $node.click();
                                    };
                                })()
                            };
                            break;

                        case 'checkbox':
                            item = {
                                type: 'checkbox',
                                disabled: !!$node.attr('disabled'),
                                name: $node.attr('label'),
                                selected: !!$node.attr('checked')
                            };
                            break;
                        case 'radio':
                            item = {
                                type: 'radio',
                                disabled: !!$node.attr('disabled'),
                                name: $node.attr('label'),
                                radio: $node.attr('radiogroup'),
                                value: $node.attr('id'),
                                selected: !!$node.attr('checked')
                            };
                            break;

                        default:
                            item = undefined;
                    }
                    break;

                case 'hr':
                    item = '-------';
                    break;

                case 'input':
                    switch ($node.attr('type')) {
                        case 'text':
                            item = {
                                type: 'text',
                                name: label || inputLabel(node),
                                disabled: !!$node.attr('disabled'),
                                value: $node.val()
                            };
                            break;

                        case 'checkbox':
                            item = {
                                type: 'checkbox',
                                name: label || inputLabel(node),
                                disabled: !!$node.attr('disabled'),
                                selected: !!$node.attr('checked')
                            };
                            break;

                        case 'radio':
                            item = {
                                type: 'radio',
                                name: label || inputLabel(node),
                                disabled: !!$node.attr('disabled'),
                                radio: !!$node.attr('name'),
                                value: $node.val(),
                                selected: !!$node.attr('checked')
                            };
                            break;

                        default:
                            item = undefined;
                            break;
                    }
                    break;

                case 'select':
                    item = {
                        type: 'select',
                        name: label || inputLabel(node),
                        disabled: !!$node.attr('disabled'),
                        selected: $node.val(),
                        options: {}
                    };
                    $node.children().each(function () {
                        item.options[this.value] = $(this).text();
                    });
                    break;

                case 'textarea':
                    item = {
                        type: 'textarea',
                        name: label || inputLabel(node),
                        disabled: !!$node.attr('disabled'),
                        value: $node.val()
                    };
                    break;

                case 'label':
                    break;

                default:
                    item = {type: 'html', html: $node.clone(true)};
                    break;
            }

            if (item) {
                counter++;
                items['key' + counter] = item;
            }
        });

        return counter;
    }

// convert html5 menu
    $.contextMenu.fromMenu = function (element) {
        var $this = $(element),
            items = {};

        menuChildren(items, $this.children());

        return items;
    };

// make defaults accessible
    $.contextMenu.defaults = defaults;
    $.contextMenu.types = types;
// export internal functions - undocumented, for hacking only!
    $.contextMenu.handle = handle;
    $.contextMenu.op = op;
    $.contextMenu.menus = menus;


});