app/assets/javascripts/jquery.ui.nestedSortable.js
/*
* 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,
noJumpFix: 0
},
_create: function(){
if (this.noJumpFix == false)
this.element.height(this.element.height());
this.element.data('sortable', this.element.data('nestedSortable'));
return $.ui.sortable.prototype._create.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)
$.ui.ddmanager.prepareOffsets(this, event);
}
//Regenerate the absolute position used for position checks
this.positionAbs = this._convertPositionTo("absolute");
//Set the helper position
if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
//Rearrange
for (var i = this.items.length - 1; i >= 0; i--) {
//Cache variables and intersection, continue if no intersection
var item = this.items[i], itemElement = item.item[0], intersection = this._intersectsWithPointer(item);
if (!intersection) continue;
if(itemElement != this.currentItem[0] //cannot intersect with itself
&& this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != itemElement //no useless actions that have been done before
&& !$.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
) {
this.direction = intersection == 1 ? "down" : "up";
if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
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;
var level = this._getLevel(this.placeholder);
var childLevels = this._getChildLevels(this.helper);
var 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) {
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);
}
this.placeholder.removeClass(this.options.errorClass);
parent.after(this.placeholder);
this._trigger("change", event, this._uiHash());
}
$.ui.sortable.prototype._mouseStop.apply(this, arguments);
},
serialize: function(o) {
var items = this._getItemsAsjQuery(o && o.connected);
var str = []; o = o || {};
$(items).each(function() {
var res = ($(o.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
var 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;
var ret = [];
$(this.element).children('li').each(function() {
var level = _recursiveItems($(this));
ret.push(level);
});
return ret;
function _recursiveItems(li) {
var id = ($(li).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
if (id != null) {
var item = {"id" : id[2]};
if ($(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;
var ret = [];
var left = 2;
ret.push({"item_id": 'root', "parent_id": 'none', "depth": sDepth, "left": '1', "right": ($('li', this.element).length + 1) * 2});
$(this.element).children('li').each(function () {
left = _recursiveArray(this, sDepth + 1, left);
});
function _sortByLeft(a,b) {
return a['left'] - b['left'];
}
ret = ret.sort(_sortByLeft);
return ret;
function _recursiveArray(item, depth, left) {
right = left + 1;
if ($(item).children(o.listType).children('li').length > 0) {
depth ++;
$(item).children(o.listType).children('li').each(function () {
right = _recursiveArray($(this), depth, right);
});
depth --;
}
id = ($(item).attr(o.attribute || 'id')).match(o.expression || (/(.+)[-=_](.+)/));
if (depth === sDepth + 1) pid = 'root';
else {
parentItem = ($(item).parent(o.listType).parent('li').attr('id')).match(o.expression || (/(.+)[-=_](.+)/));
pid = parentItem[2];
}
if (id != null) {
ret.push({"item_id": id[2], "parent_id": pid, "depth": depth, "left": left, "right": right});
}
return left = right + 1;
}
},
_clear: function(event, noPropagation) {
$.ui.sortable.prototype._clear.apply(this, arguments);
// 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);
}
return true;
},
_clearEmpty: function(item) {
if (item.children[1] && item.children[1].children.length == 0) {
item.removeChild(item.children[1]);
}
},
_getLevel: function(item) {
var level = 1;
if (this.options.listType) {
var list = item.closest(this.options.listType);
while (!list.is('.ui-sortable')/* && level < this.options.maxLevels*/) {
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);