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

   1 /*
   2  * jQuery UI Sortable 1.8.2
   3  *
   4  * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   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($) {
  16
  17 $.widget("ui.sortable", $.ui.mouse, {
  18         widgetEventPrefix: "sort",
  19         options: {
  20                 appendTo: "parent",
  21                 axis: false,
  22                 connectWith: false,
  23                 containment: false,
  24                 cursor: 'auto',
  25                 cursorAt: false,
  26                 dropOnEmpty: true,
  27                 forcePlaceholderSize: false,
  28                 forceHelperSize: false,
  29                 grid: false,
  30                 handle: false,
  31                 helper: "original",
  32                 items: '> *',
  33                 opacity: false,
  34                 placeholder: false,
  35                 revert: false,
  36                 scroll: true,
  37                 scrollSensitivity: 20,
  38                 scrollSpeed: 20,
  39                 scope: "default",
  40                 tolerance: "intersect",
  41                 zIndex: 1000
  42         },
  43         _create: function() {
  44
  45                 var o = this.options;
  46                 this.containerCache = {};
  47                 this.element.addClass("ui-sortable");
  48
  49                 //Get the items
  50                 this.refresh();
  51
  52                 //Let's determine if the items are floating
  53                 this.floating = this.items.length ? (/left|right/).test(this.items[0].item.css('float')) : false;
  54
  55                 //Let's determine the parent's offset
  56                 this.offset = this.element.offset();
  57
  58                 //Initialize mouse events for interaction
  59                 this._mouseInit();
  60
  61         },
  62
  63         destroy: function() {
  64                 this.element
  65                         .removeClass("ui-sortable ui-sortable-disabled")
  66                         .removeData("sortable")
  67                         .unbind(".sortable");
  68                 this._mouseDestroy();
  69
  70                 for ( var i = this.items.length - 1; i >= 0; i-- )
  71                         this.items[i].item.removeData("sortable-item");
  72
  73                 return this;
  74         },
  75
  76         _setOption: function(key, value){
  77                 if ( key === "disabled" ) {
  78                         this.options[ key ] = value;
  79
  80                         this.widget()
  81                                 [ value ? "addClass" : "removeClass"]( "ui-sortable-disabled" );
  82                 } else {
  83                         // Don't call widget base _setOption for disable as it adds ui-state-disabled class
  84                         $.Widget.prototype._setOption.apply(this, arguments);
  85                 }
  86         },
  87
  88         _mouseCapture: function(event, overrideHandle) {
  89
  90                 if (this.reverting) {
  91                         return false;
  92                 }
  93
  94                 if(this.options.disabled || this.options.type == 'static') return false;
  95
  96                 //We have to refresh the items data once first
  97                 this._refreshItems(event);
  98
  99                 //Find out if the clicked node (or one of its parents) is a actual item in this.items
 100                 var currentItem = null, self = this, nodes = $(event.target).parents().each(function() {
 101                         if($.data(this, 'sortable-item') == self) {
 102                                 currentItem = $(this);
 103                                 return false;
 104                         }
 105                 });
 106                 if($.data(event.target, 'sortable-item') == self) currentItem = $(event.target);
 107
 108                 if(!currentItem) return false;
 109                 if(this.options.handle && !overrideHandle) {
 110                         var validHandle = false;
 111
 112                         $(this.options.handle, currentItem).find("*").andSelf().each(function() { if(this == event.target) validHandle = true; });
 113                         if(!validHandle) return false;
 114                 }
 115
 116                 this.currentItem = currentItem;
 117                 this._removeCurrentsFromItems();
 118                 return true;
 119
 120         },
 121
 122         _mouseStart: function(event, overrideHandle, noActivation) {
 123
 124                 var o = this.options, self = this;
 125                 this.currentContainer = this;
 126
 127                 //We only need to call refreshPositions, because the refreshItems call has been moved to mouseCapture
 128                 this.refreshPositions();
 129
 130                 //Create and append the visible helper
 131                 this.helper = this._createHelper(event);
 132
 133                 //Cache the helper size
 134                 this._cacheHelperProportions();
 135
 136                 /*
 137                  * - Position generation -
 138                  * This block generates everything position related - it's the core of draggables.
 139                  */
 140
 141                 //Cache the margins of the original element
 142                 this._cacheMargins();
 143
 144                 //Get the next scrolling parent
 145                 this.scrollParent = this.helper.scrollParent();
 146
 147                 //The element's absolute position on the page minus margins
 148                 this.offset = this.currentItem.offset();
 149                 this.offset = {
 150                         top: this.offset.top - this.margins.top,
 151                         left: this.offset.left - this.margins.left
 152                 };
 153
 154                 // Only after we got the offset, we can change the helper's position to absolute
 155                 // TODO: Still need to figure out a way to make relative sorting possible
 156                 this.helper.css("position", "absolute");
 157                 this.cssPosition = this.helper.css("position");
 158
 159                 $.extend(this.offset, {
 160                         click: { //Where the click happened, relative to the element
 161                                 left: event.pageX - this.offset.left,
 162                                 top: event.pageY - this.offset.top
 163                         },
 164                         parent: this._getParentOffset(),
 165                         relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
 166                 });
 167
 168                 //Generate the original position
 169                 this.originalPosition = this._generatePosition(event);
 170                 this.originalPageX = event.pageX;
 171                 this.originalPageY = event.pageY;
 172
 173                 //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
 174                 (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));
 175
 176                 //Cache the former DOM position
 177                 this.domPosition = { prev: this.currentItem.prev()[0], parent: this.currentItem.parent()[0] };
 178
 179                 //If the helper is not the original, hide the original so it's not playing any role during the drag, won't cause anything bad this way
 180                 if(this.helper[0] != this.currentItem[0]) {
 181                         this.currentItem.hide();
 182                 }
 183
 184                 //Create the placeholder
 185                 this._createPlaceholder();
 186
 187                 //Set a containment if given in the options
 188                 if(o.containment)
 189                         this._setContainment();
 190
 191                 if(o.cursor) { // cursor option
 192                         if ($('body').css("cursor")) this._storedCursor = $('body').css("cursor");
 193                         $('body').css("cursor", o.cursor);
 194                 }
 195
 196                 if(o.opacity) { // opacity option
 197                         if (this.helper.css("opacity")) this._storedOpacity = this.helper.css("opacity");
 198                         this.helper.css("opacity", o.opacity);
 199                 }
 200
 201                 if(o.zIndex) { // zIndex option
 202                         if (this.helper.css("zIndex")) this._storedZIndex = this.helper.css("zIndex");
 203                         this.helper.css("zIndex", o.zIndex);
 204                 }
 205
 206                 //Prepare scrolling
 207                 if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML')
 208                         this.overflowOffset = this.scrollParent.offset();
 209
 210                 //Call callbacks
 211                 this._trigger("start", event, this._uiHash());
 212
 213                 //Recache the helper size
 214                 if(!this._preserveHelperProportions)
 215                         this._cacheHelperProportions();
 216
 217
 218                 //Post 'activate' events to possible containers
 219                 if(!noActivation) {
 220                          for (var i = this.containers.length - 1; i >= 0; i--) { this.containers[i]._trigger("activate", event, self._uiHash(this)); }
 221                 }
 222
 223                 //Prepare possible droppables
 224                 if($.ui.ddmanager)
 225                         $.ui.ddmanager.current = this;
 226
 227                 if ($.ui.ddmanager && !o.dropBehaviour)
 228                         $.ui.ddmanager.prepareOffsets(this, event);
 229
 230                 this.dragging = true;
 231
 232                 this.helper.addClass("ui-sortable-helper");
 233                 this._mouseDrag(event); //Execute the drag once - this causes the helper not to be visible before getting its correct position
 234                 return true;
 235
 236         },
 237
 238         _mouseDrag: function(event) {
 239
 240                 //Compute the helpers position
 241                 this.position = this._generatePosition(event);
 242                 this.positionAbs = this._convertPositionTo("absolute");
 243
 244                 if (!this.lastPositionAbs) {
 245                         this.lastPositionAbs = this.positionAbs;
 246                 }
 247
 248                 //Do scrolling
 249                 if(this.options.scroll) {
 250                         var o = this.options, scrolled = false;
 251                         if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML') {
 252
 253                                 if((this.overflowOffset.top + this.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
 254                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop + o.scrollSpeed;
 255                                 else if(event.pageY - this.overflowOffset.top < o.scrollSensitivity)
 256                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop - o.scrollSpeed;
 257
 258                                 if((this.overflowOffset.left + this.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
 259                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft + o.scrollSpeed;
 260                                 else if(event.pageX - this.overflowOffset.left < o.scrollSensitivity)
 261                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft - o.scrollSpeed;
 262
 263                         } else {
 264
 265                                 if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
 266                                         scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
 267                                 else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
 268                                         scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
 269
 270                                 if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
 271                                         scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
 272                                 else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
 273                                         scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
 274
 275                         }
 276
 277                         if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
 278                                 $.ui.ddmanager.prepareOffsets(this, event);
 279                 }
 280
 281                 //Regenerate the absolute position used for position checks
 282                 this.positionAbs = this._convertPositionTo("absolute");
 283
 284                 //Set the helper position
 285                 if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
 286                 if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
 287
 288                 //Rearrange
 289                 for (var i = this.items.length - 1; i >= 0; i--) {
 290
 291                         //Cache variables and intersection, continue if no intersection
 292                         var item = this.items[i], itemElement = item.item[0], intersection = this._intersectsWithPointer(item);
 293                         if (!intersection) continue;
 294
 295                         if(itemElement != this.currentItem[0] //cannot intersect with itself
 296                                 &&      this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != itemElement //no useless actions that have been done before
 297                                 &&      !$.ui.contains(this.placeholder[0], itemElement) //no action if the item moved is the parent of the item checked
 298                                 && (this.options.type == 'semi-dynamic' ? !$.ui.contains(this.element[0], itemElement) : true)
 299                                 //&& itemElement.parentNode == this.placeholder[0].parentNode // only rearrange items within the same container
 300                         ) {
 301
 302                                 this.direction = intersection == 1 ? "down" : "up";
 303
 304                                 if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
 305                                         this._rearrange(event, item);
 306                                 } else {
 307                                         break;
 308                                 }
 309
 310                                 this._trigger("change", event, this._uiHash());
 311                                 break;
 312                         }
 313                 }
 314
 315                 //Post events to containers
 316                 this._contactContainers(event);
 317
 318                 //Interconnect with droppables
 319                 if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
 320
 321                 //Call callbacks
 322                 this._trigger('sort', event, this._uiHash());
 323
 324                 this.lastPositionAbs = this.positionAbs;
 325                 return false;
 326
 327         },
 328
 329         _mouseStop: function(event, noPropagation) {
 330
 331                 if(!event) return;
 332
 333                 //If we are using droppables, inform the manager about the drop
 334                 if ($.ui.ddmanager && !this.options.dropBehaviour)
 335                         $.ui.ddmanager.drop(this, event);
 336
 337                 if(this.options.revert) {
 338                         var self = this;
 339                         var cur = self.placeholder.offset();
 340
 341                         self.reverting = true;
 342
 343                         $(this.helper).animate({
 344                                 left: cur.left - this.offset.parent.left - self.margins.left + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft),
 345                                 top: cur.top - this.offset.parent.top - self.margins.top + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)
 346                         }, parseInt(this.options.revert, 10) || 500, function() {
 347                                 self._clear(event);
 348                         });
 349                 } else {
 350                         this._clear(event, noPropagation);
 351                 }
 352
 353                 return false;
 354
 355         },
 356
 357         cancel: function() {
 358
 359                 var self = this;
 360
 361                 if(this.dragging) {
 362
 363                         this._mouseUp();
 364
 365                         if(this.options.helper == "original")
 366                                 this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
 367                         else
 368                                 this.currentItem.show();
 369
 370                         //Post deactivating events to containers
 371                         for (var i = this.containers.length - 1; i >= 0; i--){
 372                                 this.containers[i]._trigger("deactivate", null, self._uiHash(this));
 373                                 if(this.containers[i].containerCache.over) {
 374                                         this.containers[i]._trigger("out", null, self._uiHash(this));
 375                                         this.containers[i].containerCache.over = 0;
 376                                 }
 377                         }
 378
 379                 }
 380
 381                 //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
 382                 if(this.placeholder[0].parentNode) this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
 383                 if(this.options.helper != "original" && this.helper && this.helper[0].parentNode) this.helper.remove();
 384
 385                 $.extend(this, {
 386                         helper: null,
 387                         dragging: false,
 388                         reverting: false,
 389                         _noFinalSort: null
 390                 });
 391
 392                 if(this.domPosition.prev) {
 393                         $(this.domPosition.prev).after(this.currentItem);
 394                 } else {
 395                         $(this.domPosition.parent).prepend(this.currentItem);
 396                 }
 397
 398                 return this;
 399
 400         },
 401
 402         serialize: function(o) {
 403
 404                 var items = this._getItemsAsjQuery(o && o.connected);
 405                 var str = []; o = o || {};
 406
 407                 $(items).each(function() {
 408                         var res = ($(o.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
 409                         if(res) str.push((o.key || res[1]+'[]')+'='+(o.key && o.expression ? res[1] : res[2]));
 410                 });
 411
 412                 return str.join('&');
 413
 414         },
 415
 416         toArray: function(o) {
 417
 418                 var items = this._getItemsAsjQuery(o && o.connected);
 419                 var ret = []; o = o || {};
 420
 421                 items.each(function() { ret.push($(o.item || this).attr(o.attribute || 'id') || ''); });
 422                 return ret;
 423
 424         },
 425
 426         /* Be careful with the following core functions */
 427         _intersectsWith: function(item) {
 428
 429                 var x1 = this.positionAbs.left,
 430                         x2 = x1 + this.helperProportions.width,
 431                         y1 = this.positionAbs.top,
 432                         y2 = y1 + this.helperProportions.height;
 433
 434                 var l = item.left,
 435                         r = l + item.width,
 436                         t = item.top,
 437                         b = t + item.height;
 438
 439                 var dyClick = this.offset.click.top,
 440                         dxClick = this.offset.click.left;
 441
 442                 var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;
 443
 444                 if(        this.options.tolerance == "pointer"
 445                         || this.options.forcePointerForContainers
 446                         || (this.options.tolerance != "pointer" && this.helperProportions[this.floating ? 'width' : 'height'] > item[this.floating ? 'width' : 'height'])
 447                 ) {
 448                         return isOverElement;
 449                 } else {
 450
 451                         return (l < x1 + (this.helperProportions.width / 2) // Right Half
 452                                 && x2 - (this.helperProportions.width / 2) < r // Left Half
 453                                 && t < y1 + (this.helperProportions.height / 2) // Bottom Half
 454                                 && y2 - (this.helperProportions.height / 2) < b ); // Top Half
 455
 456                 }
 457         },
 458
 459         _intersectsWithPointer: function(item) {
 460
 461                 var isOverElementHeight = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top, item.height),
 462                         isOverElementWidth = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left, item.width),
 463                         isOverElement = isOverElementHeight && isOverElementWidth,
 464                         verticalDirection = this._getDragVerticalDirection(),
 465                         horizontalDirection = this._getDragHorizontalDirection();
 466
 467                 if (!isOverElement)
 468                         return false;
 469
 470                 return this.floating ?
 471                         ( ((horizontalDirection && horizontalDirection == "right") || verticalDirection == "down") ? 2 : 1 )
 472                         : ( verticalDirection && (verticalDirection == "down" ? 2 : 1) );
 473
 474         },
 475
 476         _intersectsWithSides: function(item) {
 477
 478                 var isOverBottomHalf = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top + (item.height/2), item.height),
 479                         isOverRightHalf = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left + (item.width/2), item.width),
 480                         verticalDirection = this._getDragVerticalDirection(),
 481                         horizontalDirection = this._getDragHorizontalDirection();
 482
 483                 if (this.floating && horizontalDirection) {
 484                         return ((horizontalDirection == "right" && isOverRightHalf) || (horizontalDirection == "left" && !isOverRightHalf));
 485                 } else {
 486                         return verticalDirection && ((verticalDirection == "down" && isOverBottomHalf) || (verticalDirection == "up" && !isOverBottomHalf));
 487                 }
 488
 489         },
 490
 491         _getDragVerticalDirection: function() {
 492                 var delta = this.positionAbs.top - this.lastPositionAbs.top;
 493                 return delta != 0 && (delta > 0 ? "down" : "up");
 494         },
 495
 496         _getDragHorizontalDirection: function() {
 497                 var delta = this.positionAbs.left - this.lastPositionAbs.left;
 498                 return delta != 0 && (delta > 0 ? "right" : "left");
 499         },
 500
 501         refresh: function(event) {
 502                 this._refreshItems(event);
 503                 this.refreshPositions();
 504                 return this;
 505         },
 506
 507         _connectWith: function() {
 508                 var options = this.options;
 509                 return options.connectWith.constructor == String
 510                         ? [options.connectWith]
 511                         : options.connectWith;
 512         },
 513
 514         _getItemsAsjQuery: function(connected) {
 515
 516                 var self = this;
 517                 var items = [];
 518                 var queries = [];
 519                 var connectWith = this._connectWith();
 520
 521                 if(connectWith && connected) {
 522                         for (var i = connectWith.length - 1; i >= 0; i--){
 523                                 var cur = $(connectWith[i]);
 524                                 for (var j = cur.length - 1; j >= 0; j--){
 525                                         var inst = $.data(cur[j], 'sortable');
 526                                         if(inst && inst != this && !inst.options.disabled) {
 527                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper").not('.ui-sortable-placeholder'), inst]);
 528                                         }
 529                                 };
 530                         };
 531                 }
 532
 533                 queries.push([$.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]);
 534
 535                 for (var i = queries.length - 1; i >= 0; i--){
 536                         queries[i][0].each(function() {
 537                                 items.push(this);
 538                         });
 539                 };
 540
 541                 return $(items);
 542
 543         },
 544
 545         _removeCurrentsFromItems: function() {
 546
 547                 var list = this.currentItem.find(":data(sortable-item)");
 548
 549                 for (var i=0; i < this.items.length; i++) {
 550
 551                         for (var j=0; j < list.length; j++) {
 552                                 if(list[j] == this.items[i].item[0])
 553                                         this.items.splice(i,1);
 554                         };
 555
 556                 };
 557
 558         },
 559
 560         _refreshItems: function(event) {
 561
 562                 this.items = [];
 563                 this.containers = [this];
 564                 var items = this.items;
 565                 var self = this;
 566                 var queries = [[$.isFunction(this.options.items) ? this.options.items.call(this.element[0], event, { item: this.currentItem }) : $(this.options.items, this.element), this]];
 567                 var connectWith = this._connectWith();
 568
 569                 if(connectWith) {
 570                         for (var i = connectWith.length - 1; i >= 0; i--){
 571                                 var cur = $(connectWith[i]);
 572                                 for (var j = cur.length - 1; j >= 0; j--){
 573                                         var inst = $.data(cur[j], 'sortable');
 574                                         if(inst && inst != this && !inst.options.disabled) {
 575                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element[0], event, { item: this.currentItem }) : $(inst.options.items, inst.element), inst]);
 576                                                 this.containers.push(inst);
 577                                         }
 578                                 };
 579                         };
 580                 }
 581
 582                 for (var i = queries.length - 1; i >= 0; i--) {
 583                         var targetData = queries[i][1];
 584                         var _queries = queries[i][0];
 585
 586                         for (var j=0, queriesLength = _queries.length; j < queriesLength; j++) {
 587                                 var item = $(_queries[j]);
 588
 589                                 item.data('sortable-item', targetData); // Data for target checking (mouse manager)
 590
 591                                 items.push({
 592                                         item: item,
 593                                         instance: targetData,
 594                                         width: 0, height: 0,
 595                                         left: 0, top: 0
 596                                 });
 597                         };
 598                 };
 599
 600         },
 601
 602         refreshPositions: function(fast) {
 603
 604                 //This has to be redone because due to the item being moved out/into the offsetParent, the offsetParent's position will change
 605                 if(this.offsetParent && this.helper) {
 606                         this.offset.parent = this._getParentOffset();
 607                 }
 608
 609                 for (var i = this.items.length - 1; i >= 0; i--){
 610                         var item = this.items[i];
 611
 612                         var t = this.options.toleranceElement ? $(this.options.toleranceElement, item.item) : item.item;
 613
 614                         if (!fast) {
 615                                 item.width = t.outerWidth();
 616                                 item.height = t.outerHeight();
 617                         }
 618
 619                         var p = t.offset();
 620                         item.left = p.left;
 621                         item.top = p.top;
 622                 };
 623
 624                 if(this.options.custom && this.options.custom.refreshContainers) {
 625                         this.options.custom.refreshContainers.call(this);
 626                 } else {
 627                         for (var i = this.containers.length - 1; i >= 0; i--){
 628                                 var p = this.containers[i].element.offset();
 629                                 this.containers[i].containerCache.left = p.left;
 630                                 this.containers[i].containerCache.top = p.top;
 631                                 this.containers[i].containerCache.width = this.containers[i].element.outerWidth();
 632                                 this.containers[i].containerCache.height = this.containers[i].element.outerHeight();
 633                         };
 634                 }
 635
 636                 return this;
 637         },
 638
 639         _createPlaceholder: function(that) {
 640
 641                 var self = that || this, o = self.options;
 642
 643                 if(!o.placeholder || o.placeholder.constructor == String) {
 644                         var className = o.placeholder;
 645                         o.placeholder = {
 646                                 element: function() {
 647
 648                                         var el = $(document.createElement(self.currentItem[0].nodeName))
 649                                                 .addClass(className || self.currentItem[0].className+" ui-sortable-placeholder")
 650                                                 .removeClass("ui-sortable-helper")[0];
 651
 652                                         if(!className)
 653                                                 el.style.visibility = "hidden";
 654
 655                                         return el;
 656                                 },
 657                                 update: function(container, p) {
 658
 659                                         // 1. If a className is set as 'placeholder option, we don't force sizes - the class is responsible for that
 660                                         // 2. The option 'forcePlaceholderSize can be enabled to force it even if a class name is specified
 661                                         if(className && !o.forcePlaceholderSize) return;
 662
 663                                         //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
 664                                         if(!p.height()) { p.height(self.currentItem.innerHeight() - parseInt(self.currentItem.css('paddingTop')||0, 10) - parseInt(self.currentItem.css('paddingBottom')||0, 10)); };
 665                                         if(!p.width()) { p.width(self.currentItem.innerWidth() - parseInt(self.currentItem.css('paddingLeft')||0, 10) - parseInt(self.currentItem.css('paddingRight')||0, 10)); };
 666                                 }
 667                         };
 668                 }
 669
 670                 //Create the placeholder
 671                 self.placeholder = $(o.placeholder.element.call(self.element, self.currentItem));
 672
 673                 //Append it after the actual current item
 674                 self.currentItem.after(self.placeholder);
 675
 676                 //Update the size of the placeholder (TODO: Logic to fuzzy, see line 316/317)
 677                 o.placeholder.update(self, self.placeholder);
 678
 679         },
 680
 681         _contactContainers: function(event) {
 682
 683                 // get innermost container that intersects with item
 684                 var innermostContainer = null, innermostIndex = null;
 685
 686
 687                 for (var i = this.containers.length - 1; i >= 0; i--){
 688
 689                         // never consider a container that's located within the item itself
 690                         if($.ui.contains(this.currentItem[0], this.containers[i].element[0]))
 691                                 continue;
 692
 693                         if(this._intersectsWith(this.containers[i].containerCache)) {
 694
 695                                 // if we've already found a container and it's more "inner" than this, then continue
 696                                 if(innermostContainer && $.ui.contains(this.containers[i].element[0], innermostContainer.element[0]))
 697                                         continue;
 698
 699                                 innermostContainer = this.containers[i];
 700                                 innermostIndex = i;
 701
 702                         } else {
 703                                 // container doesn't intersect. trigger "out" event if necessary
 704                                 if(this.containers[i].containerCache.over) {
 705                                         this.containers[i]._trigger("out", event, this._uiHash(this));
 706                                         this.containers[i].containerCache.over = 0;
 707                                 }
 708                         }
 709
 710                 }
 711
 712                 // if no intersecting containers found, return
 713                 if(!innermostContainer) return;
 714
 715                 // move the item into the container if it's not there already
 716                 if(this.containers.length === 1) {
 717                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 718                         this.containers[innermostIndex].containerCache.over = 1;
 719                 } else if(this.currentContainer != this.containers[innermostIndex]) {
 720
 721                         //When entering a new container, we will find the item with the least distance and append our item near it
 722                         var dist = 10000; var itemWithLeastDistance = null; var base = this.positionAbs[this.containers[innermostIndex].floating ? 'left' : 'top'];
 723                         for (var j = this.items.length - 1; j >= 0; j--) {
 724                                 if(!$.ui.contains(this.containers[innermostIndex].element[0], this.items[j].item[0])) continue;
 725                                 var cur = this.items[j][this.containers[innermostIndex].floating ? 'left' : 'top'];
 726                                 if(Math.abs(cur - base) < dist) {
 727                                         dist = Math.abs(cur - base); itemWithLeastDistance = this.items[j];
 728                                 }
 729                         }
 730
 731                         if(!itemWithLeastDistance && !this.options.dropOnEmpty) //Check if dropOnEmpty is enabled
 732                                 return;
 733
 734                         this.currentContainer = this.containers[innermostIndex];
 735                         itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : this._rearrange(event, null, this.containers[innermostIndex].element, true);
 736                         this._trigger("change", event, this._uiHash());
 737                         this.containers[innermostIndex]._trigger("change", event, this._uiHash(this));
 738
 739                         //Update the placeholder
 740                         this.options.placeholder.update(this.currentContainer, this.placeholder);
 741
 742                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 743                         this.containers[innermostIndex].containerCache.over = 1;
 744                 }
 745
 746
 747         },
 748
 749         _createHelper: function(event) {
 750
 751                 var o = this.options;
 752                 var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event, this.currentItem])) : (o.helper == 'clone' ? this.currentItem.clone() : this.currentItem);
 753
 754                 if(!helper.parents('body').length) //Add the helper to the DOM if that didn't happen already
 755                         $(o.appendTo != 'parent' ? o.appendTo : this.currentItem[0].parentNode)[0].appendChild(helper[0]);
 756
 757                 if(helper[0] == this.currentItem[0])
 758                         this._storedCSS = { width: this.currentItem[0].style.width, height: this.currentItem[0].style.height, position: this.currentItem.css("position"), top: this.currentItem.css("top"), left: this.currentItem.css("left") };
 759
 760                 if(helper[0].style.width == '' || o.forceHelperSize) helper.width(this.currentItem.width());
 761                 if(helper[0].style.height == '' || o.forceHelperSize) helper.height(this.currentItem.height());
 762
 763                 return helper;
 764
 765         },
 766
 767         _adjustOffsetFromHelper: function(obj) {
 768                 if (typeof obj == 'string') {
 769                         obj = obj.split(' ');
 770                 }
 771                 if ($.isArray(obj)) {
 772                         obj = {left: +obj[0], top: +obj[1] || 0};
 773                 }
 774                 if ('left' in obj) {
 775                         this.offset.click.left = obj.left + this.margins.left;
 776                 }
 777                 if ('right' in obj) {
 778                         this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 779                 }
 780                 if ('top' in obj) {
 781                         this.offset.click.top = obj.top + this.margins.top;
 782                 }
 783                 if ('bottom' in obj) {
 784                         this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 785                 }
 786         },
 787
 788         _getParentOffset: function() {
 789
 790
 791                 //Get the offsetParent and cache its position
 792                 this.offsetParent = this.helper.offsetParent();
 793                 var po = this.offsetParent.offset();
 794
 795                 // This is a special case where we need to modify a offset calculated on start, since the following happened:
 796                 // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
 797                 // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
 798                 //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
 799                 if(this.cssPosition == 'absolute' && this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) {
 800                         po.left += this.scrollParent.scrollLeft();
 801                         po.top += this.scrollParent.scrollTop();
 802                 }
 803
 804                 if((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
 805                 || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix
 806                         po = { top: 0, left: 0 };
 807
 808                 return {
 809                         top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
 810                         left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
 811                 };
 812
 813         },
 814
 815         _getRelativeOffset: function() {
 816
 817                 if(this.cssPosition == "relative") {
 818                         var p = this.currentItem.position();
 819                         return {
 820                                 top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(),
 821                                 left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft()
 822                         };
 823                 } else {
 824                         return { top: 0, left: 0 };
 825                 }
 826
 827         },
 828
 829         _cacheMargins: function() {
 830                 this.margins = {
 831                         left: (parseInt(this.currentItem.css("marginLeft"),10) || 0),
 832                         top: (parseInt(this.currentItem.css("marginTop"),10) || 0)
 833                 };
 834         },
 835
 836         _cacheHelperProportions: function() {
 837                 this.helperProportions = {
 838                         width: this.helper.outerWidth(),
 839                         height: this.helper.outerHeight()
 840                 };
 841         },
 842
 843         _setContainment: function() {
 844
 845                 var o = this.options;
 846                 if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
 847                 if(o.containment == 'document' || o.containment == 'window') this.containment = [
 848                         0 - this.offset.relative.left - this.offset.parent.left,
 849                         0 - this.offset.relative.top - this.offset.parent.top,
 850                         $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
 851                         ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
 852                 ];
 853
 854                 if(!(/^(document|window|parent)$/).test(o.containment)) {
 855                         var ce = $(o.containment)[0];
 856                         var co = $(o.containment).offset();
 857                         var over = ($(ce).css("overflow") != 'hidden');
 858
 859                         this.containment = [
 860                                 co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) + (parseInt($(ce).css("paddingLeft"),10) || 0) - this.margins.left,
 861                                 co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) + (parseInt($(ce).css("paddingTop"),10) || 0) - this.margins.top,
 862                                 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,
 863                                 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
 864                         ];
 865                 }
 866
 867         },
 868
 869         _convertPositionTo: function(d, pos) {
 870
 871                 if(!pos) pos = this.position;
 872                 var mod = d == "absolute" ? 1 : -1;
 873                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 874
 875                 return {
 876                         top: (
 877                                 pos.top                                                                                                                                 // The absolute mouse position
 878                                 + this.offset.relative.top * mod                                                                                // Only for relative positioned nodes: Relative offset from element to offset parent
 879                                 + this.offset.parent.top * mod                                                                                  // The offsetParent's offset without borders (offset + border)
 880                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
 881                         ),
 882                         left: (
 883                                 pos.left                                                                                                                                // The absolute mouse position
 884                                 + this.offset.relative.left * mod                                                                               // Only for relative positioned nodes: Relative offset from element to offset parent
 885                                 + this.offset.parent.left * mod                                                                                 // The offsetParent's offset without borders (offset + border)
 886                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod)
 887                         )
 888                 };
 889
 890         },
 891
 892         _generatePosition: function(event) {
 893
 894                 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);
 895
 896                 // This is another very weird special case that only happens for relative elements:
 897                 // 1. If the css position is relative
 898                 // 2. and the scroll parent is the document or similar to the offset parent
 899                 // we have to refresh the relative offset during the scroll so there are no jumps
 900                 if(this.cssPosition == 'relative' && !(this.scrollParent[0] != document && this.scrollParent[0] != this.offsetParent[0])) {
 901                         this.offset.relative = this._getRelativeOffset();
 902                 }
 903
 904                 var pageX = event.pageX;
 905                 var pageY = event.pageY;
 906
 907                 /*
 908                  * - Position constraining -
 909                  * Constrain the position to a mix of grid, containment.
 910                  */
 911
 912                 if(this.originalPosition) { //If we are not dragging yet, we won't check for options
 913
 914                         if(this.containment) {
 915                                 if(event.pageX - this.offset.click.left < this.containment[0]) pageX = this.containment[0] + this.offset.click.left;
 916                                 if(event.pageY - this.offset.click.top < this.containment[1]) pageY = this.containment[1] + this.offset.click.top;
 917                                 if(event.pageX - this.offset.click.left > this.containment[2]) pageX = this.containment[2] + this.offset.click.left;
 918                                 if(event.pageY - this.offset.click.top > this.containment[3]) pageY = this.containment[3] + this.offset.click.top;
 919                         }
 920
 921                         if(o.grid) {
 922                                 var top = this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1];
 923                                 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;
 924
 925                                 var left = this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0];
 926                                 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;
 927                         }
 928
 929                 }
 930
 931                 return {
 932                         top: (
 933                                 pageY                                                                                                                           // The absolute mouse position
 934                                 - this.offset.click.top                                                                                                 // Click offset (relative to the element)
 935                                 - this.offset.relative.top                                                                                              // Only for relative positioned nodes: Relative offset from element to offset parent
 936                                 - this.offset.parent.top                                                                                                // The offsetParent's offset without borders (offset + border)
 937                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
 938                         ),
 939                         left: (
 940                                 pageX                                                                                                                           // The absolute mouse position
 941                                 - this.offset.click.left                                                                                                // Click offset (relative to the element)
 942                                 - this.offset.relative.left                                                                                             // Only for relative positioned nodes: Relative offset from element to offset parent
 943                                 - this.offset.parent.left                                                                                               // The offsetParent's offset without borders (offset + border)
 944                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ))
 945                         )
 946                 };
 947
 948         },
 949
 950         _rearrange: function(event, i, a, hardRefresh) {
 951
 952                 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));
 953
 954                 //Various things done here to improve the performance:
 955                 // 1. we create a setTimeout, that calls refreshPositions
 956                 // 2. on the instance, we have a counter variable, that get's higher after every append
 957                 // 3. on the local scope, we copy the counter variable, and check in the timeout, if it's still the same
 958                 // 4. this lets only the last addition to the timeout stack through
 959                 this.counter = this.counter ? ++this.counter : 1;
 960                 var self = this, counter = this.counter;
 961
 962                 window.setTimeout(function() {
 963                         if(counter == self.counter) self.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
 964                 },0);
 965
 966         },
 967
 968         _clear: function(event, noPropagation) {
 969
 970                 this.reverting = false;
 971                 // We delay all events that have to be triggered to after the point where the placeholder has been removed and
 972                 // everything else normalized again
 973                 var delayedTriggers = [], self = this;
 974
 975                 // We first have to update the dom position of the actual currentItem
 976                 // Note: don't do it if the current item is already removed (by a user), or it gets reappended (see #4088)
 977                 if(!this._noFinalSort && this.currentItem[0].parentNode) this.placeholder.before(this.currentItem);
 978                 this._noFinalSort = null;
 979
 980                 if(this.helper[0] == this.currentItem[0]) {
 981                         for(var i in this._storedCSS) {
 982                                 if(this._storedCSS[i] == 'auto' || this._storedCSS[i] == 'static') this._storedCSS[i] = '';
 983                         }
 984                         this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
 985                 } else {
 986                         this.currentItem.show();
 987                 }
 988
 989                 if(this.fromOutside && !noPropagation) delayedTriggers.push(function(event) { this._trigger("receive", event, this._uiHash(this.fromOutside)); });
 990                 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
 991                 if(!$.ui.contains(this.element[0], this.currentItem[0])) { //Node was moved out of the current element
 992                         if(!noPropagation) delayedTriggers.push(function(event) { this._trigger("remove", event, this._uiHash()); });
 993                         for (var i = this.containers.length - 1; i >= 0; i--){
 994                                 if($.ui.contains(this.containers[i].element[0], this.currentItem[0]) && !noPropagation) {
 995                                         delayedTriggers.push((function(c) { return function(event) { c._trigger("receive", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
 996                                         delayedTriggers.push((function(c) { return function(event) { c._trigger("update", event, this._uiHash(this));  }; }).call(this, this.containers[i]));
 997                                 }
 998                         };
 999                 };
1000
1001                 //Post events to containers
1002                 for (var i = this.containers.length - 1; i >= 0; i--){
1003                         if(!noPropagation) delayedTriggers.push((function(c) { return function(event) { c._trigger("deactivate", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1004                         if(this.containers[i].containerCache.over) {
1005                                 delayedTriggers.push((function(c) { return function(event) { c._trigger("out", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1006                                 this.containers[i].containerCache.over = 0;
1007                         }
1008                 }
1009
1010                 //Do what was originally in plugins
1011                 if(this._storedCursor) $('body').css("cursor", this._storedCursor); //Reset cursor
1012                 if(this._storedOpacity) this.helper.css("opacity", this._storedOpacity); //Reset opacity
1013                 if(this._storedZIndex) this.helper.css("zIndex", this._storedZIndex == 'auto' ? '' : this._storedZIndex); //Reset z-index
1014
1015                 this.dragging = false;
1016                 if(this.cancelHelperRemoval) {
1017                         if(!noPropagation) {
1018                                 this._trigger("beforeStop", event, this._uiHash());
1019                                 for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1020                                 this._trigger("stop", event, this._uiHash());
1021                         }
1022                         return false;
1023                 }
1024
1025                 if(!noPropagation) this._trigger("beforeStop", event, this._uiHash());
1026
1027                 //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
1028                 this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
1029
1030                 if(this.helper[0] != this.currentItem[0]) this.helper.remove(); this.helper = null;
1031
1032                 if(!noPropagation) {
1033                         for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1034                         this._trigger("stop", event, this._uiHash());
1035                 }
1036
1037                 this.fromOutside = false;
1038                 return true;
1039
1040         },
1041
1042         _trigger: function() {
1043                 if ($.Widget.prototype._trigger.apply(this, arguments) === false) {
1044                         this.cancel();
1045                 }
1046         },
1047
1048         _uiHash: function(inst) {
1049                 var self = inst || this;
1050                 return {
1051                         helper: self.helper,
1052                         placeholder: self.placeholder || $([]),
1053                         position: self.position,
1054                         originalPosition: self.originalPosition,
1055                         offset: self.positionAbs,
1056                         item: self.currentItem,
1057                         sender: inst ? inst.element : null
1058                 };
1059         }
1060
1061 });
1062
1063 $.extend($.ui.sortable, {
1064         version: "1.8.2"
1065 });
1066
1067 })(jQuery);