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This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * A javascript module to handle list items drag and drop\n *\n * Example of usage:\n *\n * Create a list (for example <ul> or <tbody>) where each draggable element has a drag handle.\n * The best practice is to use the template core/drag_handle:\n * $OUTPUT->render_from_template('core/drag_handle', ['movetitle' => get_string('movecontent', 'moodle', ELEMENTNAME)]);\n *\n * Attach this JS module to this list:\n *\n * Space between define and ( critical in comment but not allowed in code in order to function\n * correctly with Moodle's requirejs.php\n *\n * define (['jquery', 'core/sortable_list'], function($, SortableList) {\n *     var list = new SortableList('ul.my-awesome-list'); // source list (usually <ul> or <tbody>) - selector or element\n *\n *     // Listen to the events when element is dragged.\n *     $('ul.my-awesome-list > *').on(SortableList.EVENTS.DROP, function(evt, info) {\n *         console.log(info);\n *     });\n *\n *     // Advanced usage. Overwrite methods getElementName, getDestinationName, moveDialogueTitle, for example:\n *     list.getElementName = function(element) {\n *         return $.Deferred().resolve(element.attr('data-name'));\n *     }\n * }\n *\n * More details: https://docs.moodle.org/dev/Sortable_list\n *\n * For the full list of possible parameters see var defaultParameters below.\n *\n * The following jQuery events are fired:\n * - SortableList.EVENTS.DRAGSTART : when user started dragging a list element\n * - SortableList.EVENTS.DRAG : when user dragged a list element to a new position\n * - SortableList.EVENTS.DROP : when user dropped a list element\n * - SortableList.EVENTS.DROPEND : when user finished dragging - either fired right after dropping or\n *                          if \"Esc\" was pressed during dragging\n *\n * @module     core/sortable_list\n * @class      sortable_list\n * @package    core\n * @copyright  2018 Marina Glancy\n * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\ndefine(['jquery', 'core/log', 'core/autoscroll', 'core/str', 'core/modal_factory', 'core/modal_events', 'core/notification'],\nfunction($, log, autoScroll, str, ModalFactory, ModalEvents, Notification) {\n\n    /**\n     * Default parameters\n     *\n     * @private\n     * @type {Object}\n     */\n    var defaultParameters = {\n        targetListSelector: null,\n        moveHandlerSelector: '[data-drag-type=move]',\n        isHorizontal: false,\n        autoScroll: true\n    };\n\n    /**\n     * Class names for different elements that may be changed during sorting\n     *\n     * @private\n     * @type {Object}\n     */\n    var CSS = {\n        keyboardDragClass: 'dragdrop-keyboard-drag',\n        isDraggedClass: 'sortable-list-is-dragged',\n        currentPositionClass: 'sortable-list-current-position',\n        sourceListClass: 'sortable-list-source',\n        targetListClass: 'sortable-list-target',\n        overElementClass: 'sortable-list-over-element'\n    };\n\n    /**\n     * Test the browser support for options objects on event listeners.\n     * @return {Boolean}\n     */\n    var eventListenerOptionsSupported = function() {\n        var passivesupported = false,\n            options,\n            testeventname = \"testpassiveeventoptions\";\n\n        // Options support testing example from:\n        // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener\n\n        try {\n            options = Object.defineProperty({}, \"passive\", {\n                get: function() {\n                    passivesupported = true;\n                }\n            });\n\n            // We use an event name that is not likely to conflict with any real event.\n            document.addEventListener(testeventname, options, options);\n            // We remove the event listener as we have tested the options already.\n            document.removeEventListener(testeventname, options, options);\n        } catch (err) {\n            // It's already false.\n            passivesupported = false;\n        }\n        return passivesupported;\n    };\n\n    /**\n     * Allow to create non-passive touchstart listeners and prevent page scrolling when dragging\n     * From: https://stackoverflow.com/a/48098097\n     *\n     * @type {Object}\n     */\n    var registerNotPassiveListeners = function(eventname) {\n        return {\n            setup: function(x, ns, handle) {\n                if (ns.includes('notPassive')) {\n                    this.addEventListener(eventname, handle, {passive: false});\n                    return true;\n                } else {\n                    return false;\n                }\n            }\n        };\n    };\n\n    if (eventListenerOptionsSupported) {\n        $.event.special.touchstart = registerNotPassiveListeners('touchstart');\n        $.event.special.touchmove = registerNotPassiveListeners('touchmove');\n        $.event.special.touchend = registerNotPassiveListeners('touchend');\n    }\n\n    /**\n     * Initialise sortable list.\n     *\n     * @param {(String|jQuery|Element)} root JQuery/DOM element representing sortable list (i.e. <ul>, <tbody>) or CSS selector\n     * @param {Object} config Parameters for the list. See defaultParameters above for examples.\n     * @property {(String|jQuery|Element)} config.targetListSelector target lists, by default same as root\n     * @property {String} config.moveHandlerSelector  CSS selector for a drag handle. By default '[data-drag-type=move]'\n     * @property {String} config.targetListSelector   CSS selector for target lists. By default the same as root\n     * @property {(Boolean|Function)} config.isHorizontal Set to true if the list is horizontal\n     *                                                (can also be a callback with list as an argument)\n     * @property {Boolean} config.autoScroll          Engages autoscroll module for automatic vertical scrolling of the\n     *                                                whole page, by default true\n     */\n    var SortableList = function(root, config) {\n\n        this.info = null;\n        this.proxy = null;\n        this.proxyDelta = null;\n        this.dragCounter = 0;\n        this.lastEvent = null;\n\n        this.config = $.extend({}, defaultParameters, config || {});\n        this.config.listSelector = root;\n        if (!this.config.targetListSelector) {\n            this.config.targetListSelector = root;\n        }\n        if (typeof this.config.listSelector === 'object') {\n            // The root is an element on the page. Register a listener for this element.\n            $(this.config.listSelector).on('mousedown touchstart.notPassive', $.proxy(this.dragStartHandler, this));\n        } else {\n            // The root is a CSS selector. Register a listener that picks up the element dynamically.\n            $('body').on('mousedown touchstart.notPassive', this.config.listSelector, $.proxy(this.dragStartHandler, this));\n        }\n        if (this.config.moveHandlerSelector !== null) {\n            $('body').on('click keypress', this.config.moveHandlerSelector, $.proxy(this.clickHandler, this));\n        }\n\n    };\n\n    /**\n     * Events fired by this entity\n     *\n     * @public\n     * @type {Object}\n     */\n    SortableList.EVENTS = {\n        DRAGSTART: 'sortablelist-dragstart',\n        DRAG: 'sortablelist-drag',\n        DROP: 'sortablelist-drop',\n        DRAGEND: 'sortablelist-dragend'\n    };\n\n    /**\n     * Resets the temporary classes assigned during dragging\n     * @private\n     */\n     SortableList.prototype.resetDraggedClasses = function() {\n        var classes = [\n            CSS.isDraggedClass,\n            CSS.currentPositionClass,\n            CSS.overElementClass,\n            CSS.targetListClass,\n        ];\n        for (var i in classes) {\n            $('.' + classes[i]).removeClass(classes[i]);\n        }\n        if (this.proxy) {\n            this.proxy.remove();\n            this.proxy = $();\n        }\n    };\n\n    /**\n     * Calculates evt.pageX, evt.pageY, evt.clientX and evt.clientY\n     *\n     * For touch events pageX and pageY are taken from the first touch;\n     * For the emulated mousemove event they are taken from the last real event.\n     *\n     * @private\n     * @param {Event} evt\n     */\n    SortableList.prototype.calculatePositionOnPage = function(evt) {\n\n        if (evt.originalEvent && evt.originalEvent.touches && evt.originalEvent.touches[0] !== undefined) {\n            // This is a touchmove or touchstart event, get position from the first touch position.\n            var touch = evt.originalEvent.touches[0];\n            evt.pageX = touch.pageX;\n            evt.pageY = touch.pageY;\n        }\n\n        if (evt.pageX === undefined) {\n            // Information is not present in case of touchend or when event was emulated by autoScroll.\n            // Take the absolute mouse position from the last event.\n            evt.pageX = this.lastEvent.pageX;\n            evt.pageY = this.lastEvent.pageY;\n        } else {\n            this.lastEvent = evt;\n        }\n\n        if (evt.clientX === undefined) {\n            // If not provided in event calculate relative mouse position.\n            evt.clientX = Math.round(evt.pageX - $(window).scrollLeft());\n            evt.clientY = Math.round(evt.pageY - $(window).scrollTop());\n        }\n    };\n\n    /**\n     * Handler from dragstart event\n     *\n     * @private\n     * @param {Event} evt\n     */\n    SortableList.prototype.dragStartHandler = function(evt) {\n        if (this.info !== null) {\n            if (this.info.type === 'click' || this.info.type === 'touchend') {\n                // Ignore double click.\n                return;\n            }\n            // Mouse down or touch while already dragging, cancel previous dragging.\n            this.moveElement(this.info.sourceList, this.info.sourceNextElement);\n            this.finishDragging();\n        }\n\n        if (evt.type === 'mousedown' && evt.which !== 1) {\n            // We only need left mouse click. If this is a mousedown event with right/middle click ignore it.\n            return;\n        }\n\n        this.calculatePositionOnPage(evt);\n        var movedElement = $(evt.target).closest($(evt.currentTarget).children());\n        if (!movedElement.length) {\n            // Can't find the element user wants to drag. They clicked on the list but outside of any element of the list.\n            return;\n        }\n\n        // Check that we grabbed the element by the handle.\n        if (this.config.moveHandlerSelector !== null) {\n            if (!$(evt.target).closest(this.config.moveHandlerSelector, movedElement).length) {\n                return;\n            }\n        }\n\n        evt.stopPropagation();\n        evt.preventDefault();\n\n        // Information about moved element with original location.\n        // This object is passed to event observers.\n        this.dragCounter++;\n        this.info = {\n            element: movedElement,\n            sourceNextElement: movedElement.next(),\n            sourceList: movedElement.parent(),\n            targetNextElement: movedElement.next(),\n            targetList: movedElement.parent(),\n            type: evt.type,\n            dropped: false,\n            startX: evt.pageX,\n            startY: evt.pageY,\n            startTime: new Date().getTime()\n        };\n\n        $(this.config.targetListSelector).addClass(CSS.targetListClass);\n\n        var offset = movedElement.offset();\n        movedElement.addClass(CSS.currentPositionClass);\n        this.proxyDelta = {x: offset.left - evt.pageX, y: offset.top - evt.pageY};\n        this.proxy = $();\n        var thisDragCounter = this.dragCounter;\n        setTimeout($.proxy(function() {\n            // This mousedown event may in fact be a beginning of a 'click' event. Use timeout before showing the\n            // dragged object so we can catch click event. When timeout finishes make sure that click event\n            // has not happened during this half a second.\n            // Verify dragcounter to make sure the user did not manage to do two very fast drag actions one after another.\n            if (this.info === null || this.info.type === 'click' || this.info.type === 'keypress'\n                    || this.dragCounter !== thisDragCounter) {\n                return;\n            }\n\n            // Create a proxy - the copy of the dragged element that moves together with a mouse.\n            this.createProxy();\n        }, this), 500);\n\n        // Start drag.\n        $(window).on('mousemove touchmove.notPassive mouseup touchend.notPassive', $.proxy(this.dragHandler, this));\n        $(window).on('keypress', $.proxy(this.dragcancelHandler, this));\n\n        // Start autoscrolling. Every time the page is scrolled emulate the mousemove event.\n        if (this.config.autoScroll) {\n            autoScroll.start(function() {\n                $(window).trigger('mousemove');\n            });\n        }\n\n       this.executeCallback(SortableList.EVENTS.DRAGSTART);\n    };\n\n    /**\n     * Creates a \"proxy\" object - a copy of the element that is being moved that always follows the mouse\n     * @private\n     */\n    SortableList.prototype.createProxy = function() {\n        this.proxy = this.info.element.clone();\n        this.info.sourceList.append(this.proxy);\n        this.proxy.removeAttr('id').removeClass(CSS.currentPositionClass)\n            .addClass(CSS.isDraggedClass).css({position: 'fixed'});\n        this.proxy.offset({top: this.proxyDelta.y + this.lastEvent.pageY, left: this.proxyDelta.x + this.lastEvent.pageX});\n    };\n\n    /**\n     * Handler for click event - when user clicks on the drag handler or presses Enter on keyboard\n     *\n     * @private\n     * @param {Event} evt\n     */\n    SortableList.prototype.clickHandler = function(evt) {\n        if (evt.type === 'keypress' && evt.originalEvent.keyCode !== 13 && evt.originalEvent.keyCode !== 32) {\n            return;\n        }\n        if (this.info !== null) {\n            // Ignore double click.\n            return;\n        }\n\n        // Find the element that this draghandle belongs to.\n        var clickedElement = $(evt.target).closest(this.config.moveHandlerSelector),\n            sourceList = clickedElement.closest(this.config.listSelector),\n            movedElement = clickedElement.closest(sourceList.children());\n        if (!movedElement.length) {\n            return;\n        }\n\n        evt.preventDefault();\n        evt.stopPropagation();\n\n        // Store information about moved element with original location.\n        this.dragCounter++;\n        this.info = {\n            element: movedElement,\n            sourceNextElement: movedElement.next(),\n            sourceList: sourceList,\n            targetNextElement: movedElement.next(),\n            targetList: sourceList,\n            dropped: false,\n            type: evt.type,\n            startTime: new Date().getTime()\n        };\n\n        this.executeCallback(SortableList.EVENTS.DRAGSTART);\n        this.displayMoveDialogue(clickedElement);\n    };\n\n    /**\n     * Finds the position of the mouse inside the element - on the top, on the bottom, on the right or on the left\\\n     *\n     * Used to determine if the moved element should be moved after or before the current element\n     *\n     * @private\n     * @param {Number} pageX\n     * @param {Number} pageY\n     * @param {jQuery} element\n     * @returns {(Object|null)}\n     */\n    SortableList.prototype.getPositionInNode = function(pageX, pageY, element) {\n        if (!element.length) {\n            return null;\n        }\n        var node = element[0],\n            offset = 0,\n            rect = node.getBoundingClientRect(),\n            y = pageY - (rect.top + window.scrollY),\n            x = pageX - (rect.left + window.scrollX);\n        if (x >= -offset && x <= rect.width + offset && y >= -offset && y <= rect.height + offset) {\n            return {\n                x: x,\n                y: y,\n                xRatio: rect.width ? (x / rect.width) : 0,\n                yRatio: rect.height ? (y / rect.height) : 0\n            };\n        }\n        return null;\n    };\n\n    /**\n     * Check if list is horizontal\n     *\n     * @param {jQuery} element\n     * @return {Boolean}\n     */\n    SortableList.prototype.isListHorizontal = function(element) {\n        var isHorizontal = this.config.isHorizontal;\n        if (isHorizontal === true || isHorizontal === false) {\n            return isHorizontal;\n        }\n        return isHorizontal(element);\n    };\n\n    /**\n     * Handler for events mousemove touchmove mouseup touchend\n     *\n     * @private\n     * @param {Event} evt\n     */\n    SortableList.prototype.dragHandler = function(evt) {\n\n        evt.preventDefault();\n        evt.stopPropagation();\n\n        this.calculatePositionOnPage(evt);\n\n        // We can not use evt.target here because it will most likely be our proxy.\n        // Move the proxy out of the way so we can find the element at the current mouse position.\n        this.proxy.offset({top: -1000, left: -1000});\n        // Find the element at the current mouse position.\n        var element = $(document.elementFromPoint(evt.clientX, evt.clientY));\n\n        // Find the list element and the list over the mouse position.\n        var mainElement = this.info.element[0],\n            isNotSelf = function() {\n                return this !== mainElement;\n            },\n            current = element.closest('.' + CSS.targetListClass + ' > :not(.' + CSS.isDraggedClass + ')').filter(isNotSelf),\n            currentList = element.closest('.' + CSS.targetListClass),\n            proxy = this.proxy,\n            isNotProxy = function() {\n                return !proxy || !proxy.length || this !== proxy[0];\n            };\n\n        // Add the specified class to the list element we are hovering.\n        $('.' + CSS.overElementClass).removeClass(CSS.overElementClass);\n        current.addClass(CSS.overElementClass);\n\n        // Move proxy to the current position.\n        this.proxy.offset({top: this.proxyDelta.y + evt.pageY, left: this.proxyDelta.x + evt.pageX});\n\n        if (currentList.length && !currentList.children().filter(isNotProxy).length) {\n            // Mouse is over an empty list.\n            this.moveElement(currentList, $());\n        } else if (current.length === 1 && !this.info.element.find(current[0]).length) {\n            // Mouse is over an element in a list - find whether we should move the current position\n            // above or below this element.\n            var coordinates = this.getPositionInNode(evt.pageX, evt.pageY, current);\n            if (coordinates) {\n                var parent = current.parent(),\n                    ratio = this.isListHorizontal(parent) ? coordinates.xRatio : coordinates.yRatio,\n                    subList = current.find('.' + CSS.targetListClass),\n                    subListEmpty = !subList.children().filter(isNotProxy).filter(isNotSelf).length;\n                if (subList.length && subListEmpty && ratio > 0.2 && ratio < 0.8) {\n                    // This is an element that is a parent of an empty list and we are around the middle of this element.\n                    // Treat it as if we are over this empty list.\n                   this.moveElement(subList, $());\n                } else if (ratio > 0.5) {\n                    // Insert after this element.\n                   this.moveElement(parent, current.next().filter(isNotProxy));\n                } else {\n                    // Insert before this element.\n                   this.moveElement(parent, current);\n                }\n            }\n        }\n\n        if (evt.type === 'mouseup' || evt.type === 'touchend') {\n            // Drop the moved element.\n            this.info.endX = evt.pageX;\n            this.info.endY = evt.pageY;\n            this.info.endTime = new Date().getTime();\n            this.info.dropped = true;\n            this.info.positionChanged = this.hasPositionChanged(this.info);\n            var oldinfo = this.info;\n            this.executeCallback(SortableList.EVENTS.DROP);\n            this.finishDragging();\n\n            if (evt.type === 'touchend'\n                    && this.config.moveHandlerSelector !== null\n                    && (oldinfo.endTime - oldinfo.startTime < 500)\n                    && !oldinfo.positionChanged) {\n                // The click event is not triggered on touch screens because we call preventDefault in touchstart handler.\n                // If the touchend quickly followed touchstart without moving, consider it a \"click\".\n                this.clickHandler(evt);\n            }\n        }\n    };\n\n    /**\n     * Checks if the position of the dragged element in the list has changed\n     *\n     * @private\n     * @param {Object} info\n     * @return {Boolean}\n     */\n    SortableList.prototype.hasPositionChanged = function(info) {\n        return info.sourceList[0] !== info.targetList[0] ||\n            info.sourceNextElement.length !== info.targetNextElement.length ||\n            (info.sourceNextElement.length && info.sourceNextElement[0] !== info.targetNextElement[0]);\n    };\n\n    /**\n     * Moves the current position of the dragged element\n     *\n     * @private\n     * @param {jQuery} parentElement\n     * @param {jQuery} beforeElement\n     */\n    SortableList.prototype.moveElement = function(parentElement, beforeElement) {\n        var dragEl = this.info.element;\n        if (beforeElement.length && beforeElement[0] === dragEl[0]) {\n            // Insert before the current position of the dragged element - nothing to do.\n            return;\n        }\n        if (parentElement[0] === this.info.targetList[0] &&\n                beforeElement.length === this.info.targetNextElement.length &&\n                beforeElement[0] === this.info.targetNextElement[0]) {\n            // Insert in the same location as the current position - nothing to do.\n            return;\n        }\n\n        if (beforeElement.length) {\n            // Move the dragged element before the specified element.\n            parentElement[0].insertBefore(dragEl[0], beforeElement[0]);\n        } else if (this.proxy && this.proxy.parent().length && this.proxy.parent()[0] === parentElement[0]) {\n            // We need to move to the end of the list but the last element in this list is a proxy.\n            // Always leave the proxy in the end of the list.\n            parentElement[0].insertBefore(dragEl[0], this.proxy[0]);\n        } else {\n            // Insert in the end of a list (when proxy is in another list).\n            parentElement[0].appendChild(dragEl[0]);\n        }\n\n        // Save the current position of the dragged element in the list.\n        this.info.targetList = parentElement;\n        this.info.targetNextElement = beforeElement;\n        this.executeCallback(SortableList.EVENTS.DRAG);\n    };\n\n    /**\n     * Finish dragging (when dropped or cancelled).\n     * @private\n     */\n    SortableList.prototype.finishDragging = function() {\n        this.resetDraggedClasses();\n        if (this.config.autoScroll) {\n            autoScroll.stop();\n        }\n        $(window).off('mousemove touchmove.notPassive mouseup touchend.notPassive', $.proxy(this.dragHandler, this));\n        $(window).off('keypress', $.proxy(this.dragcancelHandler, this));\n        this.executeCallback(SortableList.EVENTS.DRAGEND);\n        this.info = null;\n    };\n\n    /**\n     * Executes callback specified in sortable list parameters\n     *\n     * @private\n     * @param {String} eventName\n     */\n    SortableList.prototype.executeCallback = function(eventName) {\n        this.info.element.trigger(eventName, this.info);\n    };\n\n    /**\n     * Handler from keypress event (cancel dragging when Esc is pressed)\n     *\n     * @private\n     * @param {Event} evt\n     */\n    SortableList.prototype.dragcancelHandler = function(evt) {\n        if (evt.type !== 'keypress' || evt.originalEvent.keyCode !== 27) {\n            // Only cancel dragging when Esc was pressed.\n            return;\n        }\n        // Dragging was cancelled. Return item to the original position.\n        this.moveElement(this.info.sourceList, this.info.sourceNextElement);\n        this.finishDragging();\n    };\n\n    /**\n     * Returns the name of the current element to be used in the move dialogue\n     *\n     * @public\n     * @param {jQuery} element\n     * @return {Promise}\n     */\n    SortableList.prototype.getElementName = function(element) {\n        return $.Deferred().resolve(element.text());\n    };\n\n    /**\n     * Returns the label for the potential move destination, i.e. \"After ElementX\" or \"To the top of the list\"\n     *\n     * Note that we use \"after\" in the label for better UX\n     *\n     * @public\n     * @param {jQuery} parentElement\n     * @param {jQuery} afterElement\n     * @return {Promise}\n     */\n    SortableList.prototype.getDestinationName = function(parentElement, afterElement) {\n        if (!afterElement.length) {\n            return str.get_string('movecontenttothetop', 'moodle');\n        } else {\n            return this.getElementName(afterElement)\n                .then(function(name) {\n                    return str.get_string('movecontentafter', 'moodle', name);\n                });\n        }\n    };\n\n    /**\n     * Returns the title for the move dialogue (\"Move elementY\")\n     *\n     * @public\n     * @param {jQuery} element\n     * @param {jQuery} handler\n     * @return {Promise}\n     */\n    SortableList.prototype.getMoveDialogueTitle = function(element, handler) {\n        if (handler.attr('title')) {\n            return $.Deferred().resolve(handler.attr('title'));\n        }\n        return this.getElementName(element).then(function(name) {\n            return str.get_string('movecontent', 'moodle', name);\n        });\n    };\n\n    /**\n     * Returns the list of possible move destinations\n     *\n     * @private\n     * @return {Promise}\n     */\n    SortableList.prototype.getDestinationsList = function() {\n        var addedLists = [],\n            targets = $(this.config.targetListSelector),\n            destinations = $('<ul/>').addClass(CSS.keyboardDragClass),\n            result = $.when().then(function() {\n                return destinations;\n            }),\n            createLink = $.proxy(function(parentElement, beforeElement, afterElement) {\n                if (beforeElement.is(this.info.element) || afterElement.is(this.info.element)) {\n                    // Can not move before or after itself.\n                    return;\n                }\n                if ($.contains(this.info.element[0], parentElement[0])) {\n                    // Can not move to its own child.\n                    return;\n                }\n                result = result\n                .then($.proxy(function() {\n                    return this.getDestinationName(parentElement, afterElement);\n                }, this))\n                .then(function(txt) {\n                    var li = $('<li/>').appendTo(destinations);\n                    var a = $('<a href=\"#\"/>').attr('data-core_sortable_list-quickmove', 1).appendTo(li);\n                    a.data('parent-element', parentElement).data('before-element', beforeElement).text(txt);\n                    return destinations;\n                });\n            }, this),\n            addList = function() {\n                // Destination lists may be nested. We want to add all move destinations in the same\n                // order they appear on the screen for the user.\n                if ($.inArray(this, addedLists) !== -1) {\n                    return;\n                }\n                addedLists.push(this);\n                var list = $(this),\n                    children = list.children();\n                children.each(function() {\n                    var element = $(this);\n                    createLink(list, element, element.prev());\n                    // Add all nested lists.\n                    element.find(targets).each(addList);\n                });\n                createLink(list, $(), children.last());\n            };\n        targets.each(addList);\n        return result;\n    };\n\n    /**\n     * Displays the dialogue to move element.\n     * @param {jQuery} clickedElement element to return focus to after the modal is closed\n     * @private\n     */\n    SortableList.prototype.displayMoveDialogue = function(clickedElement) {\n        ModalFactory.create({\n            type: ModalFactory.types.CANCEL,\n            title: this.getMoveDialogueTitle(this.info.element, clickedElement),\n            body: this.getDestinationsList()\n        }).then($.proxy(function(modal) {\n            var quickMoveHandler = $.proxy(function(e) {\n                e.preventDefault();\n                e.stopPropagation();\n                this.moveElement($(e.currentTarget).data('parent-element'), $(e.currentTarget).data('before-element'));\n                this.info.endTime = new Date().getTime();\n                this.info.positionChanged = this.hasPositionChanged(this.info);\n                this.info.dropped = true;\n                clickedElement.focus();\n                this.executeCallback(SortableList.EVENTS.DROP);\n                modal.hide();\n            }, this);\n            modal.getRoot().on('click', '[data-core_sortable_list-quickmove]', quickMoveHandler);\n            modal.getRoot().on(ModalEvents.hidden, $.proxy(function() {\n                // Always destroy when hidden, it is generated dynamically each time.\n                modal.getRoot().off('click', '[data-core_sortable_list-quickmove]', quickMoveHandler);\n                modal.destroy();\n                this.finishDragging();\n            }, this));\n            modal.setLarge();\n            modal.show();\n            return modal;\n        }, this)).catch(Notification.exception);\n    };\n\n    return SortableList;\n\n});\n"],"file":"sortable_list.min.js"}