--- /dev/null
+/*
+ * jQuery UI Nested Sortable
+ * v 1.3.4 / 28 apr 2011
+ * http://mjsarfatti.com/sandbox/nestedSortable
+ *
+ * Depends:
+ * jquery.ui.sortable.js 1.8+
+ *
+ * License CC BY-SA 3.0
+ * Copyright 2010-2011, Manuele J Sarfatti
+ */
+
+(function($) {
+
+ $.widget("ui.nestedSortable", $.extend({}, $.ui.sortable.prototype, {
+
+ options: {
+ tabSize: 20,
+ disableNesting: 'ui-nestedSortable-no-nesting',
+ errorClass: 'ui-nestedSortable-error',
+ listType: 'ol',
+ maxLevels: 0,
+ revertOnError: 1
+ },
+
+ _create: function() {
+ this.element.data('sortable', this.element.data('nestedSortable'));
+ return $.ui.sortable.prototype._create.apply(this, arguments);
+ },
+
+ destroy: function() {
+ this.element
+ .removeData("nestedSortable")
+ .unbind(".nestedSortable");
+ return $.ui.sortable.prototype.destroy.apply(this, arguments);
+ },
+
+ _mouseDrag: function(event) {
+
+ //Compute the helpers position
+ this.position = this._generatePosition(event);
+ this.positionAbs = this._convertPositionTo("absolute");
+
+ if (!this.lastPositionAbs) {
+ this.lastPositionAbs = this.positionAbs;
+ }
+
+ //Do scrolling
+ if(this.options.scroll) {
+ var o = this.options, scrolled = false;
+ if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML') {
+
+ if((this.overflowOffset.top + this.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
+ this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop + o.scrollSpeed;
+ else if(event.pageY - this.overflowOffset.top < o.scrollSensitivity)
+ this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop - o.scrollSpeed;
+
+ if((this.overflowOffset.left + this.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
+ this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft + o.scrollSpeed;
+ else if(event.pageX - this.overflowOffset.left < o.scrollSensitivity)
+ this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft - o.scrollSpeed;
+
+ } else {
+
+ if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
+ scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
+ else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
+ scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
+
+ if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
+ scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
+ else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
+ scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
+
+ }
+
+ if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
+ $.ui.ddmanager.prepareOffsets(this, event);
+ }
+
+ //Regenerate the absolute position used for position checks
+ this.positionAbs = this._convertPositionTo("absolute");
+
+ //Set the helper position
+ if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
+ if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
+
+ //Rearrange
+ for (var i = this.items.length - 1; i >= 0; i--) {
+
+ //Cache variables and intersection, continue if no intersection
+ var item = this.items[i], itemElement = item.item[0], intersection = this._intersectsWithPointer(item);
+ if (!intersection) continue;
+
+ if (item.instance !== this.currentContainer) continue;
+
+ if(itemElement != this.currentItem[0] //cannot intersect with itself
+ && this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != itemElement //no useless actions that have been done before
+ && !$.contains(this.placeholder[0], itemElement) //no action if the item moved is the parent of the item checked
+ && (this.options.type == 'semi-dynamic' ? !$.contains(this.element[0], itemElement) : true)
+ //&& itemElement.parentNode == this.placeholder[0].parentNode // only rearrange items within the same container
+ ) {
+
+ $(itemElement).mouseenter();
+
+ this.direction = intersection == 1 ? "down" : "up";
+
+ if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
+ $(itemElement).mouseleave();
+ this._rearrange(event, item);
+ } else {
+ break;
+ }
+
+ // Clear emtpy ul's/ol's
+ this._clearEmpty(itemElement);
+
+ this._trigger("change", event, this._uiHash());
+ break;
+ }
+ }
+
+ var parentItem = (this.placeholder[0].parentNode.parentNode
+ && $(this.placeholder[0].parentNode.parentNode).closest('.ui-sortable').length)
+ ? $(this.placeholder[0].parentNode.parentNode)
+ : null,
+ level = this._getLevel(this.placeholder),
+ childLevels = this._getChildLevels(this.helper),
+ previousItem = this.placeholder[0].previousSibling ? $(this.placeholder[0].previousSibling) : null;
+
+ if (previousItem != null) {
+ while (previousItem[0].nodeName.toLowerCase() != 'li' || previousItem[0] == this.currentItem[0]) {
+ if (previousItem[0].previousSibling) {
+ previousItem = $(previousItem[0].previousSibling);
+ } else {
+ previousItem = null;
+ break;
+ }
+ }
+ }
+
+ newList = document.createElement(o.listType);
+
+ this.beyondMaxLevels = 0;
+
+ // If the item is moved to the left, send it to its parent level
+ if (parentItem != null && this.positionAbs.left < parentItem.offset().left) {
+ parentItem.after(this.placeholder[0]);
+ this._clearEmpty(parentItem[0]);
+ this._trigger("change", event, this._uiHash());
+ }
+ // If the item is below another one and is moved to the right, make it a children of it
+ else if (previousItem != null && this.positionAbs.left > previousItem.offset().left + o.tabSize) {
+ this._isAllowed(previousItem, level+childLevels+1);
+ if (!previousItem.children(o.listType).length) {
+ previousItem[0].appendChild(newList);
+ }
+ previousItem.children(o.listType)[0].appendChild(this.placeholder[0]);
+ this._trigger("change", event, this._uiHash());
+ }
+ else {
+ this._isAllowed(parentItem, level+childLevels);
+ }
+
+ //Post events to containers
+ this._contactContainers(event);
+
+ //Interconnect with droppables
+ if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
+
+ //Call callbacks
+ this._trigger('sort', event, this._uiHash());
+
+ this.lastPositionAbs = this.positionAbs;
+ return false;
+
+ },
+
+ _mouseStop: function(event, noPropagation) {
+
+ // If the item is in a position not allowed, send it back
+ if (this.beyondMaxLevels) {
+
+ this.placeholder.removeClass(this.options.errorClass);
+
+ if (this.options.revertOnError) {
+ if (this.domPosition.prev) {
+ $(this.domPosition.prev).after(this.placeholder);
+ } else {
+ $(this.domPosition.parent).prepend(this.placeholder);
+ }
+ this._trigger("revert", event, this._uiHash());
+ } else {
+ var parent = this.placeholder.parent().closest(this.options.items);
+
+ for (var i = this.beyondMaxLevels - 1; i > 0; i--) {
+ parent = parent.parent().closest(this.options.items);
+ }
+
+ parent.after(this.placeholder);
+ this._trigger("change", event, this._uiHash());
+ }
+
+ }
+
+ // Clean last empty ul/ol
+ for (var i = this.items.length - 1; i >= 0; i--) {
+ var item = this.items[i].item[0];
+ this._clearEmpty(item);
+ }
+
+ $.ui.sortable.prototype._mouseStop.apply(this, arguments);
+
+ },
+
+ serialize: function(o) {
+
+ var items = this._getItemsAsjQuery(o && o.connected),
+ str = []; o = o || {};
+
+ $(items).each(function() {
+ var res = ($(o.item || this).attr(o.attribute || 'id') || '')
+ .match(o.expression || (/(.+)[-=_](.+)/)),
+ pid = ($(o.item || this).parent(o.listType)
+ .parent('li')
+ .attr(o.attribute || 'id') || '')
+ .match(o.expression || (/(.+)[-=_](.+)/));
+
+ if (res) {
+ str.push((o.key || res[1] + '[' + (o.key && o.expression ? res[1] : res[2]) + ']')
+ + '='
+ + (pid ? (o.key && o.expression ? pid[1] : pid[2]) : 'root'));
+ }
+ });
+
+ if(!str.length && o.key) {
+ str.push(o.key + '=');
+ }
+
+ return str.join('&');
+
+ },
+
+ toHierarchy: function(o) {
+
+ o = o || {};
+ var sDepth = o.startDepthCount || 0,
+ ret = [];
+
+ $(this.element).children('li').each(function () {
+ var level = _recursiveItems($(this));
+ ret.push(level);
+ });
+
+ return ret;
+
+ function _recursiveItems(li) {
+ var id = ($(li).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
+ if (id) {
+ var item = {"id" : id[2]};
+ if ($(li).children(o.listType).children('li').length > 0) {
+ item.children = [];
+ $(li).children(o.listType).children('li').each(function() {
+ var level = _recursiveItems($(this));
+ item.children.push(level);
+ });
+ }
+ return item;
+ }
+ }
+ },
+
+ toArray: function(o) {
+
+ o = o || {};
+ var sDepth = o.startDepthCount || 0,
+ ret = [],
+ left = 2;
+
+ ret.push({
+ "item_id": 'root',
+ "parent_id": 'none',
+ "depth": sDepth,
+ "left": '1',
+ "right": ($('li', this.element).length + 1) * 2
+ });
+
+ $(this.element).children('li').each(function () {
+ left = _recursiveArray(this, sDepth + 1, left);
+ });
+
+ ret = ret.sort(function(a,b){ return (a.left - b.left); });
+
+ return ret;
+
+ function _recursiveArray(item, depth, left) {
+
+ var right = left + 1,
+ id,
+ pid;
+
+ if ($(item).children(o.listType).children('li').length > 0) {
+ depth ++;
+ $(item).children(o.listType).children('li').each(function () {
+ right = _recursiveArray($(this), depth, right);
+ });
+ depth --;
+ }
+
+ id = ($(item).attr(o.attribute || 'id')).match(o.expression || (/(.+)[-=_](.+)/));
+
+ if (depth === sDepth + 1) {
+ pid = 'root';
+ } else {
+ var parentItem = ($(item).parent(o.listType)
+ .parent('li')
+ .attr(o.attribute || 'id'))
+ .match(o.expression || (/(.+)[-=_](.+)/));
+ pid = parentItem[2];
+ }
+
+ if (id) {
+ ret.push({"item_id": id[2], "parent_id": pid, "depth": depth, "left": left, "right": right});
+ }
+
+ left = right + 1;
+ return left;
+ }
+
+ },
+
+ _clearEmpty: function(item) {
+ var emptyList = $(item).children(this.options.listType);
+ if (emptyList.length && !emptyList.children().length) {
+ emptyList.remove();
+ }
+
+ },
+
+ _getLevel: function(item) {
+
+ var level = 1;
+
+ if (this.options.listType) {
+ var list = item.closest(this.options.listType);
+ while (!list.is('.ui-sortable')) {
+ level++;
+ list = list.parent().closest(this.options.listType);
+ }
+ }
+
+ return level;
+ },
+
+ _getChildLevels: function(parent, depth) {
+ var self = this,
+ o = this.options,
+ result = 0;
+ depth = depth || 0;
+
+ $(parent).children(o.listType).children(o.items).each(function (index, child) {
+ result = Math.max(self._getChildLevels(child, depth + 1), result);
+ });
+
+ return depth ? result + 1 : result;
+ },
+
+ _isAllowed: function(parentItem, levels) {
+ var o = this.options;
+ // Are we trying to nest under a no-nest or are we nesting too deep?
+ if (parentItem == null || !(parentItem.hasClass(o.disableNesting))) {
+ if (o.maxLevels < levels && o.maxLevels != 0) {
+ this.placeholder.addClass(o.errorClass);
+ this.beyondMaxLevels = levels - o.maxLevels;
+ } else {
+ this.placeholder.removeClass(o.errorClass);
+ this.beyondMaxLevels = 0;
+ }
+ } else {
+ this.placeholder.addClass(o.errorClass);
+ if (o.maxLevels < levels && o.maxLevels != 0) {
+ this.beyondMaxLevels = levels - o.maxLevels;
+ } else {
+ this.beyondMaxLevels = 1;
+ }
+ }
+ }
+
+ }));
+
+ $.ui.nestedSortable.prototype.options = $.extend({}, $.ui.sortable.prototype.options, $.ui.nestedSortable.prototype.options);
+})(jQuery);
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