resources/jquery.ui/jquery.ui.sortable.js

   1 /*!
   2  * jQuery UI Sortable 1.8.24
   3  *
   4  * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT or GPL Version 2 licenses.
   6  * http://jquery.org/license
   7  *
   8  * http://docs.jquery.com/UI/Sortables
   9  *
  10  * Depends:
  11  *      jquery.ui.core.js
  12  *      jquery.ui.mouse.js
  13  *      jquery.ui.widget.js
  14  */
  15 (function( $, undefined ) {
  16
  17 $.widget("ui.sortable", $.ui.mouse, {
  18         widgetEventPrefix: "sort",
  19         ready: false,
  20         options: {
  21                 appendTo: "parent",
  22                 axis: false,
  23                 connectWith: false,
  24                 containment: false,
  25                 cursor: 'auto',
  26                 cursorAt: false,
  27                 dropOnEmpty: true,
  28                 forcePlaceholderSize: false,
  29                 forceHelperSize: false,
  30                 grid: false,
  31                 handle: false,
  32                 helper: "original",
  33                 items: '> *',
  34                 opacity: false,
  35                 placeholder: false,
  36                 revert: false,
  37                 scroll: true,
  38                 scrollSensitivity: 20,
  39                 scrollSpeed: 20,
  40                 scope: "default",
  41                 tolerance: "intersect",
  42                 zIndex: 1000
  43         },
  44         _create: function() {
  45
  46                 var o = this.options;
  47                 this.containerCache = {};
  48                 this.element.addClass("ui-sortable");
  49
  50                 //Get the items
  51                 this.refresh();
  52
  53                 //Let's determine if the items are being displayed horizontally
  54                 this.floating = this.items.length ? o.axis === 'x' || (/left|right/).test(this.items[0].item.css('float')) || (/inline|table-cell/).test(this.items[0].item.css('display')) : false;
  55
  56                 //Let's determine the parent's offset
  57                 this.offset = this.element.offset();
  58
  59                 //Initialize mouse events for interaction
  60                 this._mouseInit();
  61
  62                 //We're ready to go
  63                 this.ready = true
  64
  65         },
  66
  67         destroy: function() {
  68                 $.Widget.prototype.destroy.call( this );
  69                 this.element
  70                         .removeClass("ui-sortable ui-sortable-disabled");
  71                 this._mouseDestroy();
  72
  73                 for ( var i = this.items.length - 1; i >= 0; i-- )
  74                         this.items[i].item.removeData(this.widgetName + "-item");
  75
  76                 return this;
  77         },
  78
  79         _setOption: function(key, value){
  80                 if ( key === "disabled" ) {
  81                         this.options[ key ] = value;
  82
  83                         this.widget()
  84                                 [ value ? "addClass" : "removeClass"]( "ui-sortable-disabled" );
  85                 } else {
  86                         // Don't call widget base _setOption for disable as it adds ui-state-disabled class
  87                         $.Widget.prototype._setOption.apply(this, arguments);
  88                 }
  89         },
  90
  91         _mouseCapture: function(event, overrideHandle) {
  92                 var that = this;
  93
  94                 if (this.reverting) {
  95                         return false;
  96                 }
  97
  98                 if(this.options.disabled || this.options.type == 'static') return false;
  99
 100                 //We have to refresh the items data once first
 101                 this._refreshItems(event);
 102
 103                 //Find out if the clicked node (or one of its parents) is a actual item in this.items
 104                 var currentItem = null, self = this, nodes = $(event.target).parents().each(function() {
 105                         if($.data(this, that.widgetName + '-item') == self) {
 106                                 currentItem = $(this);
 107                                 return false;
 108                         }
 109                 });
 110                 if($.data(event.target, that.widgetName + '-item') == self) currentItem = $(event.target);
 111
 112                 if(!currentItem) return false;
 113                 if(this.options.handle && !overrideHandle) {
 114                         var validHandle = false;
 115
 116                         $(this.options.handle, currentItem).find("*").andSelf().each(function() { if(this == event.target) validHandle = true; });
 117                         if(!validHandle) return false;
 118                 }
 119
 120                 this.currentItem = currentItem;
 121                 this._removeCurrentsFromItems();
 122                 return true;
 123
 124         },
 125
 126         _mouseStart: function(event, overrideHandle, noActivation) {
 127
 128                 var o = this.options, self = this;
 129                 this.currentContainer = this;
 130
 131                 //We only need to call refreshPositions, because the refreshItems call has been moved to mouseCapture
 132                 this.refreshPositions();
 133
 134                 //Create and append the visible helper
 135                 this.helper = this._createHelper(event);
 136
 137                 //Cache the helper size
 138                 this._cacheHelperProportions();
 139
 140                 /*
 141                  * - Position generation -
 142                  * This block generates everything position related - it's the core of draggables.
 143                  */
 144
 145                 //Cache the margins of the original element
 146                 this._cacheMargins();
 147
 148                 //Get the next scrolling parent
 149                 this.scrollParent = this.helper.scrollParent();
 150
 151                 //The element's absolute position on the page minus margins
 152                 this.offset = this.currentItem.offset();
 153                 this.offset = {
 154                         top: this.offset.top - this.margins.top,
 155                         left: this.offset.left - this.margins.left
 156                 };
 157
 158                 $.extend(this.offset, {
 159                         click: { //Where the click happened, relative to the element
 160                                 left: event.pageX - this.offset.left,
 161                                 top: event.pageY - this.offset.top
 162                         },
 163                         parent: this._getParentOffset(),
 164                         relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
 165                 });
 166
 167                 // Only after we got the offset, we can change the helper's position to absolute
 168                 // TODO: Still need to figure out a way to make relative sorting possible
 169                 this.helper.css("position", "absolute");
 170                 this.cssPosition = this.helper.css("position");
 171
 172                 //Generate the original position
 173                 this.originalPosition = this._generatePosition(event);
 174                 this.originalPageX = event.pageX;
 175                 this.originalPageY = event.pageY;
 176
 177                 //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
 178                 (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));
 179
 180                 //Cache the former DOM position
 181                 this.domPosition = { prev: this.currentItem.prev()[0], parent: this.currentItem.parent()[0] };
 182
 183                 //If the helper is not the original, hide the original so it's not playing any role during the drag, won't cause anything bad this way
 184                 if(this.helper[0] != this.currentItem[0]) {
 185                         this.currentItem.hide();
 186                 }
 187
 188                 //Create the placeholder
 189                 this._createPlaceholder();
 190
 191                 //Set a containment if given in the options
 192                 if(o.containment)
 193                         this._setContainment();
 194
 195                 if(o.cursor) { // cursor option
 196                         if ($('body').css("cursor")) this._storedCursor = $('body').css("cursor");
 197                         $('body').css("cursor", o.cursor);
 198                 }
 199
 200                 if(o.opacity) { // opacity option
 201                         if (this.helper.css("opacity")) this._storedOpacity = this.helper.css("opacity");
 202                         this.helper.css("opacity", o.opacity);
 203                 }
 204
 205                 if(o.zIndex) { // zIndex option
 206                         if (this.helper.css("zIndex")) this._storedZIndex = this.helper.css("zIndex");
 207                         this.helper.css("zIndex", o.zIndex);
 208                 }
 209
 210                 //Prepare scrolling
 211                 if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML')
 212                         this.overflowOffset = this.scrollParent.offset();
 213
 214                 //Call callbacks
 215                 this._trigger("start", event, this._uiHash());
 216
 217                 //Recache the helper size
 218                 if(!this._preserveHelperProportions)
 219                         this._cacheHelperProportions();
 220
 221
 222                 //Post 'activate' events to possible containers
 223                 if(!noActivation) {
 224                          for (var i = this.containers.length - 1; i >= 0; i--) { this.containers[i]._trigger("activate", event, self._uiHash(this)); }
 225                 }
 226
 227                 //Prepare possible droppables
 228                 if($.ui.ddmanager)
 229                         $.ui.ddmanager.current = this;
 230
 231                 if ($.ui.ddmanager && !o.dropBehaviour)
 232                         $.ui.ddmanager.prepareOffsets(this, event);
 233
 234                 this.dragging = true;
 235
 236                 this.helper.addClass("ui-sortable-helper");
 237                 this._mouseDrag(event); //Execute the drag once - this causes the helper not to be visible before getting its correct position
 238                 return true;
 239
 240         },
 241
 242         _mouseDrag: function(event) {
 243
 244                 //Compute the helpers position
 245                 this.position = this._generatePosition(event);
 246                 this.positionAbs = this._convertPositionTo("absolute");
 247
 248                 if (!this.lastPositionAbs) {
 249                         this.lastPositionAbs = this.positionAbs;
 250                 }
 251
 252                 //Do scrolling
 253                 if(this.options.scroll) {
 254                         var o = this.options, scrolled = false;
 255                         if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML') {
 256
 257                                 if((this.overflowOffset.top + this.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
 258                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop + o.scrollSpeed;
 259                                 else if(event.pageY - this.overflowOffset.top < o.scrollSensitivity)
 260                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop - o.scrollSpeed;
 261
 262                                 if((this.overflowOffset.left + this.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
 263                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft + o.scrollSpeed;
 264                                 else if(event.pageX - this.overflowOffset.left < o.scrollSensitivity)
 265                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft - o.scrollSpeed;
 266
 267                         } else {
 268
 269                                 if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
 270                                         scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
 271                                 else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
 272                                         scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
 273
 274                                 if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
 275                                         scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
 276                                 else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
 277                                         scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
 278
 279                         }
 280
 281                         if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
 282                                 $.ui.ddmanager.prepareOffsets(this, event);
 283                 }
 284
 285                 //Regenerate the absolute position used for position checks
 286                 this.positionAbs = this._convertPositionTo("absolute");
 287
 288                 //Set the helper position
 289                 if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
 290                 if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
 291
 292                 //Rearrange
 293                 for (var i = this.items.length - 1; i >= 0; i--) {
 294
 295                         //Cache variables and intersection, continue if no intersection
 296                         var item = this.items[i], itemElement = item.item[0], intersection = this._intersectsWithPointer(item);
 297                         if (!intersection) continue;
 298
 299                         // Only put the placeholder inside the current Container, skip all
 300                         // items form other containers. This works because when moving
 301                         // an item from one container to another the
 302                         // currentContainer is switched before the placeholder is moved.
 303                         //
 304                         // Without this moving items in "sub-sortables" can cause the placeholder to jitter
 305                         // beetween the outer and inner container.
 306                         if (item.instance !== this.currentContainer) continue;
 307
 308                         if (itemElement != this.currentItem[0] //cannot intersect with itself
 309                                 &&      this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != itemElement //no useless actions that have been done before
 310                                 &&      !$.ui.contains(this.placeholder[0], itemElement) //no action if the item moved is the parent of the item checked
 311                                 && (this.options.type == 'semi-dynamic' ? !$.ui.contains(this.element[0], itemElement) : true)
 312                                 //&& itemElement.parentNode == this.placeholder[0].parentNode // only rearrange items within the same container
 313                         ) {
 314
 315                                 this.direction = intersection == 1 ? "down" : "up";
 316
 317                                 if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
 318                                         this._rearrange(event, item);
 319                                 } else {
 320                                         break;
 321                                 }
 322
 323                                 this._trigger("change", event, this._uiHash());
 324                                 break;
 325                         }
 326                 }
 327
 328                 //Post events to containers
 329                 this._contactContainers(event);
 330
 331                 //Interconnect with droppables
 332                 if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
 333
 334                 //Call callbacks
 335                 this._trigger('sort', event, this._uiHash());
 336
 337                 this.lastPositionAbs = this.positionAbs;
 338                 return false;
 339
 340         },
 341
 342         _mouseStop: function(event, noPropagation) {
 343
 344                 if(!event) return;
 345
 346                 //If we are using droppables, inform the manager about the drop
 347                 if ($.ui.ddmanager && !this.options.dropBehaviour)
 348                         $.ui.ddmanager.drop(this, event);
 349
 350                 if(this.options.revert) {
 351                         var self = this;
 352                         var cur = self.placeholder.offset();
 353
 354                         self.reverting = true;
 355
 356                         $(this.helper).animate({
 357                                 left: cur.left - this.offset.parent.left - self.margins.left + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft),
 358                                 top: cur.top - this.offset.parent.top - self.margins.top + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)
 359                         }, parseInt(this.options.revert, 10) || 500, function() {
 360                                 self._clear(event);
 361                         });
 362                 } else {
 363                         this._clear(event, noPropagation);
 364                 }
 365
 366                 return false;
 367
 368         },
 369
 370         cancel: function() {
 371
 372                 var self = this;
 373
 374                 if(this.dragging) {
 375
 376                         this._mouseUp({ target: null });
 377
 378                         if(this.options.helper == "original")
 379                                 this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
 380                         else
 381                                 this.currentItem.show();
 382
 383                         //Post deactivating events to containers
 384                         for (var i = this.containers.length - 1; i >= 0; i--){
 385                                 this.containers[i]._trigger("deactivate", null, self._uiHash(this));
 386                                 if(this.containers[i].containerCache.over) {
 387                                         this.containers[i]._trigger("out", null, self._uiHash(this));
 388                                         this.containers[i].containerCache.over = 0;
 389                                 }
 390                         }
 391
 392                 }
 393
 394                 if (this.placeholder) {
 395                         //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
 396                         if(this.placeholder[0].parentNode) this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
 397                         if(this.options.helper != "original" && this.helper && this.helper[0].parentNode) this.helper.remove();
 398
 399                         $.extend(this, {
 400                                 helper: null,
 401                                 dragging: false,
 402                                 reverting: false,
 403                                 _noFinalSort: null
 404                         });
 405
 406                         if(this.domPosition.prev) {
 407                                 $(this.domPosition.prev).after(this.currentItem);
 408                         } else {
 409                                 $(this.domPosition.parent).prepend(this.currentItem);
 410                         }
 411                 }
 412
 413                 return this;
 414
 415         },
 416
 417         serialize: function(o) {
 418
 419                 var items = this._getItemsAsjQuery(o && o.connected);
 420                 var str = []; o = o || {};
 421
 422                 $(items).each(function() {
 423                         var res = ($(o.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
 424                         if(res) str.push((o.key || res[1]+'[]')+'='+(o.key && o.expression ? res[1] : res[2]));
 425                 });
 426
 427                 if(!str.length && o.key) {
 428                         str.push(o.key + '=');
 429                 }
 430
 431                 return str.join('&');
 432
 433         },
 434
 435         toArray: function(o) {
 436
 437                 var items = this._getItemsAsjQuery(o && o.connected);
 438                 var ret = []; o = o || {};
 439
 440                 items.each(function() { ret.push($(o.item || this).attr(o.attribute || 'id') || ''); });
 441                 return ret;
 442
 443         },
 444
 445         /* Be careful with the following core functions */
 446         _intersectsWith: function(item) {
 447
 448                 var x1 = this.positionAbs.left,
 449                         x2 = x1 + this.helperProportions.width,
 450                         y1 = this.positionAbs.top,
 451                         y2 = y1 + this.helperProportions.height;
 452
 453                 var l = item.left,
 454                         r = l + item.width,
 455                         t = item.top,
 456                         b = t + item.height;
 457
 458                 var dyClick = this.offset.click.top,
 459                         dxClick = this.offset.click.left;
 460
 461                 var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;
 462
 463                 if(        this.options.tolerance == "pointer"
 464                         || this.options.forcePointerForContainers
 465                         || (this.options.tolerance != "pointer" && this.helperProportions[this.floating ? 'width' : 'height'] > item[this.floating ? 'width' : 'height'])
 466                 ) {
 467                         return isOverElement;
 468                 } else {
 469
 470                         return (l < x1 + (this.helperProportions.width / 2) // Right Half
 471                                 && x2 - (this.helperProportions.width / 2) < r // Left Half
 472                                 && t < y1 + (this.helperProportions.height / 2) // Bottom Half
 473                                 && y2 - (this.helperProportions.height / 2) < b ); // Top Half
 474
 475                 }
 476         },
 477
 478         _intersectsWithPointer: function(item) {
 479
 480                 var isOverElementHeight = (this.options.axis === 'x') || $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top, item.height),
 481                         isOverElementWidth = (this.options.axis === 'y') || $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left, item.width),
 482                         isOverElement = isOverElementHeight && isOverElementWidth,
 483                         verticalDirection = this._getDragVerticalDirection(),
 484                         horizontalDirection = this._getDragHorizontalDirection();
 485
 486                 if (!isOverElement)
 487                         return false;
 488
 489                 return this.floating ?
 490                         ( ((horizontalDirection && horizontalDirection == "right") || verticalDirection == "down") ? 2 : 1 )
 491                         : ( verticalDirection && (verticalDirection == "down" ? 2 : 1) );
 492
 493         },
 494
 495         _intersectsWithSides: function(item) {
 496
 497                 var isOverBottomHalf = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top + (item.height/2), item.height),
 498                         isOverRightHalf = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left + (item.width/2), item.width),
 499                         verticalDirection = this._getDragVerticalDirection(),
 500                         horizontalDirection = this._getDragHorizontalDirection();
 501
 502                 if (this.floating && horizontalDirection) {
 503                         return ((horizontalDirection == "right" && isOverRightHalf) || (horizontalDirection == "left" && !isOverRightHalf));
 504                 } else {
 505                         return verticalDirection && ((verticalDirection == "down" && isOverBottomHalf) || (verticalDirection == "up" && !isOverBottomHalf));
 506                 }
 507
 508         },
 509
 510         _getDragVerticalDirection: function() {
 511                 var delta = this.positionAbs.top - this.lastPositionAbs.top;
 512                 return delta != 0 && (delta > 0 ? "down" : "up");
 513         },
 514
 515         _getDragHorizontalDirection: function() {
 516                 var delta = this.positionAbs.left - this.lastPositionAbs.left;
 517                 return delta != 0 && (delta > 0 ? "right" : "left");
 518         },
 519
 520         refresh: function(event) {
 521                 this._refreshItems(event);
 522                 this.refreshPositions();
 523                 return this;
 524         },
 525
 526         _connectWith: function() {
 527                 var options = this.options;
 528                 return options.connectWith.constructor == String
 529                         ? [options.connectWith]
 530                         : options.connectWith;
 531         },
 532
 533         _getItemsAsjQuery: function(connected) {
 534
 535                 var self = this;
 536                 var items = [];
 537                 var queries = [];
 538                 var connectWith = this._connectWith();
 539
 540                 if(connectWith && connected) {
 541                         for (var i = connectWith.length - 1; i >= 0; i--){
 542                                 var cur = $(connectWith[i]);
 543                                 for (var j = cur.length - 1; j >= 0; j--){
 544                                         var inst = $.data(cur[j], this.widgetName);
 545                                         if(inst && inst != this && !inst.options.disabled) {
 546                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper").not('.ui-sortable-placeholder'), inst]);
 547                                         }
 548                                 };
 549                         };
 550                 }
 551
 552                 queries.push([$.isFunction(this.options.items) ? this.options.items.call(this.element, null, { options: this.options, item: this.currentItem }) : $(this.options.items, this.element).not(".ui-sortable-helper").not('.ui-sortable-placeholder'), this]);
 553
 554                 for (var i = queries.length - 1; i >= 0; i--){
 555                         queries[i][0].each(function() {
 556                                 items.push(this);
 557                         });
 558                 };
 559
 560                 return $(items);
 561
 562         },
 563
 564         _removeCurrentsFromItems: function() {
 565
 566                 var list = this.currentItem.find(":data(" + this.widgetName + "-item)");
 567
 568                 for (var i=0; i < this.items.length; i++) {
 569
 570                         for (var j=0; j < list.length; j++) {
 571                                 if(list[j] == this.items[i].item[0])
 572                                         this.items.splice(i,1);
 573                         };
 574
 575                 };
 576
 577         },
 578
 579         _refreshItems: function(event) {
 580
 581                 this.items = [];
 582                 this.containers = [this];
 583                 var items = this.items;
 584                 var self = this;
 585                 var queries = [[$.isFunction(this.options.items) ? this.options.items.call(this.element[0], event, { item: this.currentItem }) : $(this.options.items, this.element), this]];
 586                 var connectWith = this._connectWith();
 587
 588                 if(connectWith && this.ready) { //Shouldn't be run the first time through due to massive slow-down
 589                         for (var i = connectWith.length - 1; i >= 0; i--){
 590                                 var cur = $(connectWith[i]);
 591                                 for (var j = cur.length - 1; j >= 0; j--){
 592                                         var inst = $.data(cur[j], this.widgetName);
 593                                         if(inst && inst != this && !inst.options.disabled) {
 594                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element[0], event, { item: this.currentItem }) : $(inst.options.items, inst.element), inst]);
 595                                                 this.containers.push(inst);
 596                                         }
 597                                 };
 598                         };
 599                 }
 600
 601                 for (var i = queries.length - 1; i >= 0; i--) {
 602                         var targetData = queries[i][1];
 603                         var _queries = queries[i][0];
 604
 605                         for (var j=0, queriesLength = _queries.length; j < queriesLength; j++) {
 606                                 var item = $(_queries[j]);
 607
 608                                 item.data(this.widgetName + '-item', targetData); // Data for target checking (mouse manager)
 609
 610                                 items.push({
 611                                         item: item,
 612                                         instance: targetData,
 613                                         width: 0, height: 0,
 614                                         left: 0, top: 0
 615                                 });
 616                         };
 617                 };
 618
 619         },
 620
 621         refreshPositions: function(fast) {
 622
 623                 //This has to be redone because due to the item being moved out/into the offsetParent, the offsetParent's position will change
 624                 if(this.offsetParent && this.helper) {
 625                         this.offset.parent = this._getParentOffset();
 626                 }
 627
 628                 for (var i = this.items.length - 1; i >= 0; i--){
 629                         var item = this.items[i];
 630
 631                         //We ignore calculating positions of all connected containers when we're not over them
 632                         if(item.instance != this.currentContainer && this.currentContainer && item.item[0] != this.currentItem[0])
 633                                 continue;
 634
 635                         var t = this.options.toleranceElement ? $(this.options.toleranceElement, item.item) : item.item;
 636
 637                         if (!fast) {
 638                                 item.width = t.outerWidth();
 639                                 item.height = t.outerHeight();
 640                         }
 641
 642                         var p = t.offset();
 643                         item.left = p.left;
 644                         item.top = p.top;
 645                 };
 646
 647                 if(this.options.custom && this.options.custom.refreshContainers) {
 648                         this.options.custom.refreshContainers.call(this);
 649                 } else {
 650                         for (var i = this.containers.length - 1; i >= 0; i--){
 651                                 var p = this.containers[i].element.offset();
 652                                 this.containers[i].containerCache.left = p.left;
 653                                 this.containers[i].containerCache.top = p.top;
 654                                 this.containers[i].containerCache.width = this.containers[i].element.outerWidth();
 655                                 this.containers[i].containerCache.height = this.containers[i].element.outerHeight();
 656                         };
 657                 }
 658
 659                 return this;
 660         },
 661
 662         _createPlaceholder: function(that) {
 663
 664                 var self = that || this, o = self.options;
 665
 666                 if(!o.placeholder || o.placeholder.constructor == String) {
 667                         var className = o.placeholder;
 668                         o.placeholder = {
 669                                 element: function() {
 670
 671                                         var el = $(document.createElement(self.currentItem[0].nodeName))
 672                                                 .addClass(className || self.currentItem[0].className+" ui-sortable-placeholder")
 673                                                 .removeClass("ui-sortable-helper")[0];
 674
 675                                         if(!className)
 676                                                 el.style.visibility = "hidden";
 677
 678                                         return el;
 679                                 },
 680                                 update: function(container, p) {
 681
 682                                         // 1. If a className is set as 'placeholder option, we don't force sizes - the class is responsible for that
 683                                         // 2. The option 'forcePlaceholderSize can be enabled to force it even if a class name is specified
 684                                         if(className && !o.forcePlaceholderSize) return;
 685
 686                                         //If the element doesn't have a actual height by itself (without styles coming from a stylesheet), it receives the inline height from the dragged item
 687                                         if(!p.height()) { p.height(self.currentItem.innerHeight() - parseInt(self.currentItem.css('paddingTop')||0, 10) - parseInt(self.currentItem.css('paddingBottom')||0, 10)); };
 688                                         if(!p.width()) { p.width(self.currentItem.innerWidth() - parseInt(self.currentItem.css('paddingLeft')||0, 10) - parseInt(self.currentItem.css('paddingRight')||0, 10)); };
 689                                 }
 690                         };
 691                 }
 692
 693                 //Create the placeholder
 694                 self.placeholder = $(o.placeholder.element.call(self.element, self.currentItem));
 695
 696                 //Append it after the actual current item
 697                 self.currentItem.after(self.placeholder);
 698
 699                 //Update the size of the placeholder (TODO: Logic to fuzzy, see line 316/317)
 700                 o.placeholder.update(self, self.placeholder);
 701
 702         },
 703
 704         _contactContainers: function(event) {
 705
 706                 // get innermost container that intersects with item
 707                 var innermostContainer = null, innermostIndex = null;
 708
 709
 710                 for (var i = this.containers.length - 1; i >= 0; i--){
 711
 712                         // never consider a container that's located within the item itself
 713                         if($.ui.contains(this.currentItem[0], this.containers[i].element[0]))
 714                                 continue;
 715
 716                         if(this._intersectsWith(this.containers[i].containerCache)) {
 717
 718                                 // if we've already found a container and it's more "inner" than this, then continue
 719                                 if(innermostContainer && $.ui.contains(this.containers[i].element[0], innermostContainer.element[0]))
 720                                         continue;
 721
 722                                 innermostContainer = this.containers[i];
 723                                 innermostIndex = i;
 724
 725                         } else {
 726                                 // container doesn't intersect. trigger "out" event if necessary
 727                                 if(this.containers[i].containerCache.over) {
 728                                         this.containers[i]._trigger("out", event, this._uiHash(this));
 729                                         this.containers[i].containerCache.over = 0;
 730                                 }
 731                         }
 732
 733                 }
 734
 735                 // if no intersecting containers found, return
 736                 if(!innermostContainer) return;
 737
 738                 // move the item into the container if it's not there already
 739                 if(this.containers.length === 1) {
 740                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 741                         this.containers[innermostIndex].containerCache.over = 1;
 742                 } else if(this.currentContainer != this.containers[innermostIndex]) {
 743
 744                         //When entering a new container, we will find the item with the least distance and append our item near it
 745                         var dist = 10000; var itemWithLeastDistance = null; var base = this.positionAbs[this.containers[innermostIndex].floating ? 'left' : 'top'];
 746                         for (var j = this.items.length - 1; j >= 0; j--) {
 747                                 if(!$.ui.contains(this.containers[innermostIndex].element[0], this.items[j].item[0])) continue;
 748                                 var cur = this.containers[innermostIndex].floating ? this.items[j].item.offset().left : this.items[j].item.offset().top;
 749                                 if(Math.abs(cur - base) < dist) {
 750                                         dist = Math.abs(cur - base); itemWithLeastDistance = this.items[j];
 751                                         this.direction = (cur - base > 0) ? 'down' : 'up';
 752                                 }
 753                         }
 754
 755                         if(!itemWithLeastDistance && !this.options.dropOnEmpty) //Check if dropOnEmpty is enabled
 756                                 return;
 757
 758                         this.currentContainer = this.containers[innermostIndex];
 759                         itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : this._rearrange(event, null, this.containers[innermostIndex].element, true);
 760                         this._trigger("change", event, this._uiHash());
 761                         this.containers[innermostIndex]._trigger("change", event, this._uiHash(this));
 762
 763                         //Update the placeholder
 764                         this.options.placeholder.update(this.currentContainer, this.placeholder);
 765
 766                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 767                         this.containers[innermostIndex].containerCache.over = 1;
 768                 }
 769
 770
 771         },
 772
 773         _createHelper: function(event) {
 774
 775                 var o = this.options;
 776                 var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event, this.currentItem])) : (o.helper == 'clone' ? this.currentItem.clone() : this.currentItem);
 777
 778                 if(!helper.parents('body').length) //Add the helper to the DOM if that didn't happen already
 779                         $(o.appendTo != 'parent' ? o.appendTo : this.currentItem[0].parentNode)[0].appendChild(helper[0]);
 780
 781                 if(helper[0] == this.currentItem[0])
 782                         this._storedCSS = { width: this.currentItem[0].style.width, height: this.currentItem[0].style.height, position: this.currentItem.css("position"), top: this.currentItem.css("top"), left: this.currentItem.css("left") };
 783
 784                 if(helper[0].style.width == '' || o.forceHelperSize) helper.width(this.currentItem.width());
 785                 if(helper[0].style.height == '' || o.forceHelperSize) helper.height(this.currentItem.height());
 786
 787                 return helper;
 788
 789         },
 790
 791         _adjustOffsetFromHelper: function(obj) {
 792                 if (typeof obj == 'string') {
 793                         obj = obj.split(' ');
 794                 }
 795                 if ($.isArray(obj)) {
 796                         obj = {left: +obj[0], top: +obj[1] || 0};
 797                 }
 798                 if ('left' in obj) {
 799                         this.offset.click.left = obj.left + this.margins.left;
 800                 }
 801                 if ('right' in obj) {
 802                         this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 803                 }
 804                 if ('top' in obj) {
 805                         this.offset.click.top = obj.top + this.margins.top;
 806                 }
 807                 if ('bottom' in obj) {
 808                         this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 809                 }
 810         },
 811
 812         _getParentOffset: function() {
 813
 814
 815                 //Get the offsetParent and cache its position
 816                 this.offsetParent = this.helper.offsetParent();
 817                 var po = this.offsetParent.offset();
 818
 819                 // This is a special case where we need to modify a offset calculated on start, since the following happened:
 820                 // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
 821                 // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
 822                 //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
 823                 if(this.cssPosition == 'absolute' && this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) {
 824                         po.left += this.scrollParent.scrollLeft();
 825                         po.top += this.scrollParent.scrollTop();
 826                 }
 827
 828                 if((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
 829                 || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix
 830                         po = { top: 0, left: 0 };
 831
 832                 return {
 833                         top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
 834                         left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
 835                 };
 836
 837         },
 838
 839         _getRelativeOffset: function() {
 840
 841                 if(this.cssPosition == "relative") {
 842                         var p = this.currentItem.position();
 843                         return {
 844                                 top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(),
 845                                 left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft()
 846                         };
 847                 } else {
 848                         return { top: 0, left: 0 };
 849                 }
 850
 851         },
 852
 853         _cacheMargins: function() {
 854                 this.margins = {
 855                         left: (parseInt(this.currentItem.css("marginLeft"),10) || 0),
 856                         top: (parseInt(this.currentItem.css("marginTop"),10) || 0)
 857                 };
 858         },
 859
 860         _cacheHelperProportions: function() {
 861                 this.helperProportions = {
 862                         width: this.helper.outerWidth(),
 863                         height: this.helper.outerHeight()
 864                 };
 865         },
 866
 867         _setContainment: function() {
 868
 869                 var o = this.options;
 870                 if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
 871                 if(o.containment == 'document' || o.containment == 'window') this.containment = [
 872                         0 - this.offset.relative.left - this.offset.parent.left,
 873                         0 - this.offset.relative.top - this.offset.parent.top,
 874                         $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
 875                         ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
 876                 ];
 877
 878                 if(!(/^(document|window|parent)$/).test(o.containment)) {
 879                         var ce = $(o.containment)[0];
 880                         var co = $(o.containment).offset();
 881                         var over = ($(ce).css("overflow") != 'hidden');
 882
 883                         this.containment = [
 884                                 co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) + (parseInt($(ce).css("paddingLeft"),10) || 0) - this.margins.left,
 885                                 co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) + (parseInt($(ce).css("paddingTop"),10) || 0) - this.margins.top,
 886                                 co.left+(over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - (parseInt($(ce).css("paddingRight"),10) || 0) - this.helperProportions.width - this.margins.left,
 887                                 co.top+(over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - (parseInt($(ce).css("paddingBottom"),10) || 0) - this.helperProportions.height - this.margins.top
 888                         ];
 889                 }
 890
 891         },
 892
 893         _convertPositionTo: function(d, pos) {
 894
 895                 if(!pos) pos = this.position;
 896                 var mod = d == "absolute" ? 1 : -1;
 897                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 898
 899                 return {
 900                         top: (
 901                                 pos.top                                                                                                                                 // The absolute mouse position
 902                                 + this.offset.relative.top * mod                                                                                // Only for relative positioned nodes: Relative offset from element to offset parent
 903                                 + this.offset.parent.top * mod                                                                                  // The offsetParent's offset without borders (offset + border)
 904                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
 905                         ),
 906                         left: (
 907                                 pos.left                                                                                                                                // The absolute mouse position
 908                                 + this.offset.relative.left * mod                                                                               // Only for relative positioned nodes: Relative offset from element to offset parent
 909                                 + this.offset.parent.left * mod                                                                                 // The offsetParent's offset without borders (offset + border)
 910                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod)
 911                         )
 912                 };
 913
 914         },
 915
 916         _generatePosition: function(event) {
 917
 918                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 919
 920                 // This is another very weird special case that only happens for relative elements:
 921                 // 1. If the css position is relative
 922                 // 2. and the scroll parent is the document or similar to the offset parent
 923                 // we have to refresh the relative offset during the scroll so there are no jumps
 924                 if(this.cssPosition == 'relative' && !(this.scrollParent[0] != document && this.scrollParent[0] != this.offsetParent[0])) {
 925                         this.offset.relative = this._getRelativeOffset();
 926                 }
 927
 928                 var pageX = event.pageX;
 929                 var pageY = event.pageY;
 930
 931                 /*
 932                  * - Position constraining -
 933                  * Constrain the position to a mix of grid, containment.
 934                  */
 935
 936                 if(this.originalPosition) { //If we are not dragging yet, we won't check for options
 937
 938                         if(this.containment) {
 939                                 if(event.pageX - this.offset.click.left < this.containment[0]) pageX = this.containment[0] + this.offset.click.left;
 940                                 if(event.pageY - this.offset.click.top < this.containment[1]) pageY = this.containment[1] + this.offset.click.top;
 941                                 if(event.pageX - this.offset.click.left > this.containment[2]) pageX = this.containment[2] + this.offset.click.left;
 942                                 if(event.pageY - this.offset.click.top > this.containment[3]) pageY = this.containment[3] + this.offset.click.top;
 943                         }
 944
 945                         if(o.grid) {
 946                                 var top = this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1];
 947                                 pageY = this.containment ? (!(top - this.offset.click.top < this.containment[1] || top - this.offset.click.top > this.containment[3]) ? top : (!(top - this.offset.click.top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
 948
 949                                 var left = this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0];
 950                                 pageX = this.containment ? (!(left - this.offset.click.left < this.containment[0] || left - this.offset.click.left > this.containment[2]) ? left : (!(left - this.offset.click.left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
 951                         }
 952
 953                 }
 954
 955                 return {
 956                         top: (
 957                                 pageY                                                                                                                           // The absolute mouse position
 958                                 - this.offset.click.top                                                                                                 // Click offset (relative to the element)
 959                                 - this.offset.relative.top                                                                                              // Only for relative positioned nodes: Relative offset from element to offset parent
 960                                 - this.offset.parent.top                                                                                                // The offsetParent's offset without borders (offset + border)
 961                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
 962                         ),
 963                         left: (
 964                                 pageX                                                                                                                           // The absolute mouse position
 965                                 - this.offset.click.left                                                                                                // Click offset (relative to the element)
 966                                 - this.offset.relative.left                                                                                             // Only for relative positioned nodes: Relative offset from element to offset parent
 967                                 - this.offset.parent.left                                                                                               // The offsetParent's offset without borders (offset + border)
 968                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ))
 969                         )
 970                 };
 971
 972         },
 973
 974         _rearrange: function(event, i, a, hardRefresh) {
 975
 976                 a ? a[0].appendChild(this.placeholder[0]) : i.item[0].parentNode.insertBefore(this.placeholder[0], (this.direction == 'down' ? i.item[0] : i.item[0].nextSibling));
 977
 978                 //Various things done here to improve the performance:
 979                 // 1. we create a setTimeout, that calls refreshPositions
 980                 // 2. on the instance, we have a counter variable, that get's higher after every append
 981                 // 3. on the local scope, we copy the counter variable, and check in the timeout, if it's still the same
 982                 // 4. this lets only the last addition to the timeout stack through
 983                 this.counter = this.counter ? ++this.counter : 1;
 984                 var self = this, counter = this.counter;
 985
 986                 window.setTimeout(function() {
 987                         if(counter == self.counter) self.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
 988                 },0);
 989
 990         },
 991
 992         _clear: function(event, noPropagation) {
 993
 994                 this.reverting = false;
 995                 // We delay all events that have to be triggered to after the point where the placeholder has been removed and
 996                 // everything else normalized again
 997                 var delayedTriggers = [], self = this;
 998
 999                 // We first have to update the dom position of the actual currentItem
1000                 // Note: don't do it if the current item is already removed (by a user), or it gets reappended (see #4088)
1001                 if(!this._noFinalSort && this.currentItem.parent().length) this.placeholder.before(this.currentItem);
1002                 this._noFinalSort = null;
1003
1004                 if(this.helper[0] == this.currentItem[0]) {
1005                         for(var i in this._storedCSS) {
1006                                 if(this._storedCSS[i] == 'auto' || this._storedCSS[i] == 'static') this._storedCSS[i] = '';
1007                         }
1008                         this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
1009                 } else {
1010                         this.currentItem.show();
1011                 }
1012
1013                 if(this.fromOutside && !noPropagation) delayedTriggers.push(function(event) { this._trigger("receive", event, this._uiHash(this.fromOutside)); });
1014                 if((this.fromOutside || this.domPosition.prev != this.currentItem.prev().not(".ui-sortable-helper")[0] || this.domPosition.parent != this.currentItem.parent()[0]) && !noPropagation) delayedTriggers.push(function(event) { this._trigger("update", event, this._uiHash()); }); //Trigger update callback if the DOM position has changed
1015
1016                 // Check if the items Container has Changed and trigger appropriate
1017                 // events.
1018                 if (this !== this.currentContainer) {
1019                         if(!noPropagation) {
1020                                 delayedTriggers.push(function(event) { this._trigger("remove", event, this._uiHash()); });
1021                                 delayedTriggers.push((function(c) { return function(event) { c._trigger("receive", event, this._uiHash(this)); };  }).call(this, this.currentContainer));
1022                                 delayedTriggers.push((function(c) { return function(event) { c._trigger("update", event, this._uiHash(this));  }; }).call(this, this.currentContainer));
1023                         }
1024                 }
1025
1026                 //Post events to containers
1027                 for (var i = this.containers.length - 1; i >= 0; i--){
1028                         if(!noPropagation) delayedTriggers.push((function(c) { return function(event) { c._trigger("deactivate", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1029                         if(this.containers[i].containerCache.over) {
1030                                 delayedTriggers.push((function(c) { return function(event) { c._trigger("out", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1031                                 this.containers[i].containerCache.over = 0;
1032                         }
1033                 }
1034
1035                 //Do what was originally in plugins
1036                 if(this._storedCursor) $('body').css("cursor", this._storedCursor); //Reset cursor
1037                 if(this._storedOpacity) this.helper.css("opacity", this._storedOpacity); //Reset opacity
1038                 if(this._storedZIndex) this.helper.css("zIndex", this._storedZIndex == 'auto' ? '' : this._storedZIndex); //Reset z-index
1039
1040                 this.dragging = false;
1041                 if(this.cancelHelperRemoval) {
1042                         if(!noPropagation) {
1043                                 this._trigger("beforeStop", event, this._uiHash());
1044                                 for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1045                                 this._trigger("stop", event, this._uiHash());
1046                         }
1047
1048                         this.fromOutside = false;
1049                         return false;
1050                 }
1051
1052                 if(!noPropagation) this._trigger("beforeStop", event, this._uiHash());
1053
1054                 //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
1055                 this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
1056
1057                 if(this.helper[0] != this.currentItem[0]) this.helper.remove(); this.helper = null;
1058
1059                 if(!noPropagation) {
1060                         for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1061                         this._trigger("stop", event, this._uiHash());
1062                 }
1063
1064                 this.fromOutside = false;
1065                 return true;
1066
1067         },
1068
1069         _trigger: function() {
1070                 if ($.Widget.prototype._trigger.apply(this, arguments) === false) {
1071                         this.cancel();
1072                 }
1073         },
1074
1075         _uiHash: function(inst) {
1076                 var self = inst || this;
1077                 return {
1078                         helper: self.helper,
1079                         placeholder: self.placeholder || $([]),
1080                         position: self.position,
1081                         originalPosition: self.originalPosition,
1082                         offset: self.positionAbs,
1083                         item: self.currentItem,
1084                         sender: inst ? inst.element : null
1085                 };
1086         }
1087
1088 });
1089
1090 $.extend($.ui.sortable, {
1091         version: "1.8.24"
1092 });
1093
1094 })(jQuery);