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

   1 /*
   2  * jQuery UI Sortable 1.8.17
   3  *
   4  * Copyright 2011, 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         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 being displayed horizontally
  53                 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;
  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                 this._mouseDestroy();
  67
  68                 for ( var i = this.items.length - 1; i >= 0; i-- )
  69                         this.items[i].item.removeData(this.widgetName + "-item");
  70
  71                 return this;
  72         },
  73
  74         _setOption: function(key, value){
  75                 if ( key === "disabled" ) {
  76                         this.options[ key ] = value;
  77
  78                         this.widget()
  79                                 [ value ? "addClass" : "removeClass"]( "ui-sortable-disabled" );
  80                 } else {
  81                         // Don't call widget base _setOption for disable as it adds ui-state-disabled class
  82                         $.Widget.prototype._setOption.apply(this, arguments);
  83                 }
  84         },
  85
  86         _mouseCapture: function(event, overrideHandle) {
  87                 var that = this;
  88
  89                 if (this.reverting) {
  90                         return false;
  91                 }
  92
  93                 if(this.options.disabled || this.options.type == 'static') return false;
  94
  95                 //We have to refresh the items data once first
  96                 this._refreshItems(event);
  97
  98                 //Find out if the clicked node (or one of its parents) is a actual item in this.items
  99                 var currentItem = null, self = this, nodes = $(event.target).parents().each(function() {
 100                         if($.data(this, that.widgetName + '-item') == self) {
 101                                 currentItem = $(this);
 102                                 return false;
 103                         }
 104                 });
 105                 if($.data(event.target, that.widgetName + '-item') == self) currentItem = $(event.target);
 106
 107                 if(!currentItem) return false;
 108                 if(this.options.handle && !overrideHandle) {
 109                         var validHandle = false;
 110
 111                         $(this.options.handle, currentItem).find("*").andSelf().each(function() { if(this == event.target) validHandle = true; });
 112                         if(!validHandle) return false;
 113                 }
 114
 115                 this.currentItem = currentItem;
 116                 this._removeCurrentsFromItems();
 117                 return true;
 118
 119         },
 120
 121         _mouseStart: function(event, overrideHandle, noActivation) {
 122
 123                 var o = this.options, self = this;
 124                 this.currentContainer = this;
 125
 126                 //We only need to call refreshPositions, because the refreshItems call has been moved to mouseCapture
 127                 this.refreshPositions();
 128
 129                 //Create and append the visible helper
 130                 this.helper = this._createHelper(event);
 131
 132                 //Cache the helper size
 133                 this._cacheHelperProportions();
 134
 135                 /*
 136                  * - Position generation -
 137                  * This block generates everything position related - it's the core of draggables.
 138                  */
 139
 140                 //Cache the margins of the original element
 141                 this._cacheMargins();
 142
 143                 //Get the next scrolling parent
 144                 this.scrollParent = this.helper.scrollParent();
 145
 146                 //The element's absolute position on the page minus margins
 147                 this.offset = this.currentItem.offset();
 148                 this.offset = {
 149                         top: this.offset.top - this.margins.top,
 150                         left: this.offset.left - this.margins.left
 151                 };
 152
 153                 // Only after we got the offset, we can change the helper's position to absolute
 154                 // TODO: Still need to figure out a way to make relative sorting possible
 155                 this.helper.css("position", "absolute");
 156                 this.cssPosition = this.helper.css("position");
 157
 158                 $.extend(this.offset, {
 159                         click: { //Where the click happened, relative to the element
 160                                 left: event.pageX - this.offset.left,
 161                                 top: event.pageY - this.offset.top
 162                         },
 163                         parent: this._getParentOffset(),
 164                         relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
 165                 });
 166
 167                 //Generate the original position
 168                 this.originalPosition = this._generatePosition(event);
 169                 this.originalPageX = event.pageX;
 170                 this.originalPageY = event.pageY;
 171
 172                 //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
 173                 (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));
 174
 175                 //Cache the former DOM position
 176                 this.domPosition = { prev: this.currentItem.prev()[0], parent: this.currentItem.parent()[0] };
 177
 178                 //If the helper is not the original, hide the original so it's not playing any role during the drag, won't cause anything bad this way
 179                 if(this.helper[0] != this.currentItem[0]) {
 180                         this.currentItem.hide();
 181                 }
 182
 183                 //Create the placeholder
 184                 this._createPlaceholder();
 185
 186                 //Set a containment if given in the options
 187                 if(o.containment)
 188                         this._setContainment();
 189
 190                 if(o.cursor) { // cursor option
 191                         if ($('body').css("cursor")) this._storedCursor = $('body').css("cursor");
 192                         $('body').css("cursor", o.cursor);
 193                 }
 194
 195                 if(o.opacity) { // opacity option
 196                         if (this.helper.css("opacity")) this._storedOpacity = this.helper.css("opacity");
 197                         this.helper.css("opacity", o.opacity);
 198                 }
 199
 200                 if(o.zIndex) { // zIndex option
 201                         if (this.helper.css("zIndex")) this._storedZIndex = this.helper.css("zIndex");
 202                         this.helper.css("zIndex", o.zIndex);
 203                 }
 204
 205                 //Prepare scrolling
 206                 if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML')
 207                         this.overflowOffset = this.scrollParent.offset();
 208
 209                 //Call callbacks
 210                 this._trigger("start", event, this._uiHash());
 211
 212                 //Recache the helper size
 213                 if(!this._preserveHelperProportions)
 214                         this._cacheHelperProportions();
 215
 216
 217                 //Post 'activate' events to possible containers
 218                 if(!noActivation) {
 219                          for (var i = this.containers.length - 1; i >= 0; i--) { this.containers[i]._trigger("activate", event, self._uiHash(this)); }
 220                 }
 221
 222                 //Prepare possible droppables
 223                 if($.ui.ddmanager)
 224                         $.ui.ddmanager.current = this;
 225
 226                 if ($.ui.ddmanager && !o.dropBehaviour)
 227                         $.ui.ddmanager.prepareOffsets(this, event);
 228
 229                 this.dragging = true;
 230
 231                 this.helper.addClass("ui-sortable-helper");
 232                 this._mouseDrag(event); //Execute the drag once - this causes the helper not to be visible before getting its correct position
 233                 return true;
 234
 235         },
 236
 237         _mouseDrag: function(event) {
 238
 239                 //Compute the helpers position
 240                 this.position = this._generatePosition(event);
 241                 this.positionAbs = this._convertPositionTo("absolute");
 242
 243                 if (!this.lastPositionAbs) {
 244                         this.lastPositionAbs = this.positionAbs;
 245                 }
 246
 247                 //Do scrolling
 248                 if(this.options.scroll) {
 249                         var o = this.options, scrolled = false;
 250                         if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML') {
 251
 252                                 if((this.overflowOffset.top + this.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
 253                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop + o.scrollSpeed;
 254                                 else if(event.pageY - this.overflowOffset.top < o.scrollSensitivity)
 255                                         this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop - o.scrollSpeed;
 256
 257                                 if((this.overflowOffset.left + this.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
 258                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft + o.scrollSpeed;
 259                                 else if(event.pageX - this.overflowOffset.left < o.scrollSensitivity)
 260                                         this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft - o.scrollSpeed;
 261
 262                         } else {
 263
 264                                 if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
 265                                         scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
 266                                 else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
 267                                         scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
 268
 269                                 if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
 270                                         scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
 271                                 else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
 272                                         scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
 273
 274                         }
 275
 276                         if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
 277                                 $.ui.ddmanager.prepareOffsets(this, event);
 278                 }
 279
 280                 //Regenerate the absolute position used for position checks
 281                 this.positionAbs = this._convertPositionTo("absolute");
 282
 283                 //Set the helper position
 284                 if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
 285                 if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
 286
 287                 //Rearrange
 288                 for (var i = this.items.length - 1; i >= 0; i--) {
 289
 290                         //Cache variables and intersection, continue if no intersection
 291                         var item = this.items[i], itemElement = item.item[0], intersection = this._intersectsWithPointer(item);
 292                         if (!intersection) continue;
 293
 294                         if(itemElement != this.currentItem[0] //cannot intersect with itself
 295                                 &&      this.placeholder[intersection == 1 ? "next" : "prev"]()[0] != itemElement //no useless actions that have been done before
 296                                 &&      !$.ui.contains(this.placeholder[0], itemElement) //no action if the item moved is the parent of the item checked
 297                                 && (this.options.type == 'semi-dynamic' ? !$.ui.contains(this.element[0], itemElement) : true)
 298                                 //&& itemElement.parentNode == this.placeholder[0].parentNode // only rearrange items within the same container
 299                         ) {
 300
 301                                 this.direction = intersection == 1 ? "down" : "up";
 302
 303                                 if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
 304                                         this._rearrange(event, item);
 305                                 } else {
 306                                         break;
 307                                 }
 308
 309                                 this._trigger("change", event, this._uiHash());
 310                                 break;
 311                         }
 312                 }
 313
 314                 //Post events to containers
 315                 this._contactContainers(event);
 316
 317                 //Interconnect with droppables
 318                 if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
 319
 320                 //Call callbacks
 321                 this._trigger('sort', event, this._uiHash());
 322
 323                 this.lastPositionAbs = this.positionAbs;
 324                 return false;
 325
 326         },
 327
 328         _mouseStop: function(event, noPropagation) {
 329
 330                 if(!event) return;
 331
 332                 //If we are using droppables, inform the manager about the drop
 333                 if ($.ui.ddmanager && !this.options.dropBehaviour)
 334                         $.ui.ddmanager.drop(this, event);
 335
 336                 if(this.options.revert) {
 337                         var self = this;
 338                         var cur = self.placeholder.offset();
 339
 340                         self.reverting = true;
 341
 342                         $(this.helper).animate({
 343                                 left: cur.left - this.offset.parent.left - self.margins.left + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollLeft),
 344                                 top: cur.top - this.offset.parent.top - self.margins.top + (this.offsetParent[0] == document.body ? 0 : this.offsetParent[0].scrollTop)
 345                         }, parseInt(this.options.revert, 10) || 500, function() {
 346                                 self._clear(event);
 347                         });
 348                 } else {
 349                         this._clear(event, noPropagation);
 350                 }
 351
 352                 return false;
 353
 354         },
 355
 356         cancel: function() {
 357
 358                 var self = this;
 359
 360                 if(this.dragging) {
 361
 362                         this._mouseUp({ target: null });
 363
 364                         if(this.options.helper == "original")
 365                                 this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
 366                         else
 367                                 this.currentItem.show();
 368
 369                         //Post deactivating events to containers
 370                         for (var i = this.containers.length - 1; i >= 0; i--){
 371                                 this.containers[i]._trigger("deactivate", null, self._uiHash(this));
 372                                 if(this.containers[i].containerCache.over) {
 373                                         this.containers[i]._trigger("out", null, self._uiHash(this));
 374                                         this.containers[i].containerCache.over = 0;
 375                                 }
 376                         }
 377
 378                 }
 379
 380                 if (this.placeholder) {
 381                         //$(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
 399                 return this;
 400
 401         },
 402
 403         serialize: function(o) {
 404
 405                 var items = this._getItemsAsjQuery(o && o.connected);
 406                 var str = []; o = o || {};
 407
 408                 $(items).each(function() {
 409                         var res = ($(o.item || this).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
 410                         if(res) str.push((o.key || res[1]+'[]')+'='+(o.key && o.expression ? res[1] : res[2]));
 411                 });
 412
 413                 if(!str.length && o.key) {
 414                         str.push(o.key + '=');
 415                 }
 416
 417                 return str.join('&');
 418
 419         },
 420
 421         toArray: function(o) {
 422
 423                 var items = this._getItemsAsjQuery(o && o.connected);
 424                 var ret = []; o = o || {};
 425
 426                 items.each(function() { ret.push($(o.item || this).attr(o.attribute || 'id') || ''); });
 427                 return ret;
 428
 429         },
 430
 431         /* Be careful with the following core functions */
 432         _intersectsWith: function(item) {
 433
 434                 var x1 = this.positionAbs.left,
 435                         x2 = x1 + this.helperProportions.width,
 436                         y1 = this.positionAbs.top,
 437                         y2 = y1 + this.helperProportions.height;
 438
 439                 var l = item.left,
 440                         r = l + item.width,
 441                         t = item.top,
 442                         b = t + item.height;
 443
 444                 var dyClick = this.offset.click.top,
 445                         dxClick = this.offset.click.left;
 446
 447                 var isOverElement = (y1 + dyClick) > t && (y1 + dyClick) < b && (x1 + dxClick) > l && (x1 + dxClick) < r;
 448
 449                 if(        this.options.tolerance == "pointer"
 450                         || this.options.forcePointerForContainers
 451                         || (this.options.tolerance != "pointer" && this.helperProportions[this.floating ? 'width' : 'height'] > item[this.floating ? 'width' : 'height'])
 452                 ) {
 453                         return isOverElement;
 454                 } else {
 455
 456                         return (l < x1 + (this.helperProportions.width / 2) // Right Half
 457                                 && x2 - (this.helperProportions.width / 2) < r // Left Half
 458                                 && t < y1 + (this.helperProportions.height / 2) // Bottom Half
 459                                 && y2 - (this.helperProportions.height / 2) < b ); // Top Half
 460
 461                 }
 462         },
 463
 464         _intersectsWithPointer: function(item) {
 465
 466                 var isOverElementHeight = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top, item.height),
 467                         isOverElementWidth = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left, item.width),
 468                         isOverElement = isOverElementHeight && isOverElementWidth,
 469                         verticalDirection = this._getDragVerticalDirection(),
 470                         horizontalDirection = this._getDragHorizontalDirection();
 471
 472                 if (!isOverElement)
 473                         return false;
 474
 475                 return this.floating ?
 476                         ( ((horizontalDirection && horizontalDirection == "right") || verticalDirection == "down") ? 2 : 1 )
 477                         : ( verticalDirection && (verticalDirection == "down" ? 2 : 1) );
 478
 479         },
 480
 481         _intersectsWithSides: function(item) {
 482
 483                 var isOverBottomHalf = $.ui.isOverAxis(this.positionAbs.top + this.offset.click.top, item.top + (item.height/2), item.height),
 484                         isOverRightHalf = $.ui.isOverAxis(this.positionAbs.left + this.offset.click.left, item.left + (item.width/2), item.width),
 485                         verticalDirection = this._getDragVerticalDirection(),
 486                         horizontalDirection = this._getDragHorizontalDirection();
 487
 488                 if (this.floating && horizontalDirection) {
 489                         return ((horizontalDirection == "right" && isOverRightHalf) || (horizontalDirection == "left" && !isOverRightHalf));
 490                 } else {
 491                         return verticalDirection && ((verticalDirection == "down" && isOverBottomHalf) || (verticalDirection == "up" && !isOverBottomHalf));
 492                 }
 493
 494         },
 495
 496         _getDragVerticalDirection: function() {
 497                 var delta = this.positionAbs.top - this.lastPositionAbs.top;
 498                 return delta != 0 && (delta > 0 ? "down" : "up");
 499         },
 500
 501         _getDragHorizontalDirection: function() {
 502                 var delta = this.positionAbs.left - this.lastPositionAbs.left;
 503                 return delta != 0 && (delta > 0 ? "right" : "left");
 504         },
 505
 506         refresh: function(event) {
 507                 this._refreshItems(event);
 508                 this.refreshPositions();
 509                 return this;
 510         },
 511
 512         _connectWith: function() {
 513                 var options = this.options;
 514                 return options.connectWith.constructor == String
 515                         ? [options.connectWith]
 516                         : options.connectWith;
 517         },
 518
 519         _getItemsAsjQuery: function(connected) {
 520
 521                 var self = this;
 522                 var items = [];
 523                 var queries = [];
 524                 var connectWith = this._connectWith();
 525
 526                 if(connectWith && connected) {
 527                         for (var i = connectWith.length - 1; i >= 0; i--){
 528                                 var cur = $(connectWith[i]);
 529                                 for (var j = cur.length - 1; j >= 0; j--){
 530                                         var inst = $.data(cur[j], this.widgetName);
 531                                         if(inst && inst != this && !inst.options.disabled) {
 532                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element) : $(inst.options.items, inst.element).not(".ui-sortable-helper").not('.ui-sortable-placeholder'), inst]);
 533                                         }
 534                                 };
 535                         };
 536                 }
 537
 538                 queries.push([$.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]);
 539
 540                 for (var i = queries.length - 1; i >= 0; i--){
 541                         queries[i][0].each(function() {
 542                                 items.push(this);
 543                         });
 544                 };
 545
 546                 return $(items);
 547
 548         },
 549
 550         _removeCurrentsFromItems: function() {
 551
 552                 var list = this.currentItem.find(":data(" + this.widgetName + "-item)");
 553
 554                 for (var i=0; i < this.items.length; i++) {
 555
 556                         for (var j=0; j < list.length; j++) {
 557                                 if(list[j] == this.items[i].item[0])
 558                                         this.items.splice(i,1);
 559                         };
 560
 561                 };
 562
 563         },
 564
 565         _refreshItems: function(event) {
 566
 567                 this.items = [];
 568                 this.containers = [this];
 569                 var items = this.items;
 570                 var self = this;
 571                 var queries = [[$.isFunction(this.options.items) ? this.options.items.call(this.element[0], event, { item: this.currentItem }) : $(this.options.items, this.element), this]];
 572                 var connectWith = this._connectWith();
 573
 574                 if(connectWith) {
 575                         for (var i = connectWith.length - 1; i >= 0; i--){
 576                                 var cur = $(connectWith[i]);
 577                                 for (var j = cur.length - 1; j >= 0; j--){
 578                                         var inst = $.data(cur[j], this.widgetName);
 579                                         if(inst && inst != this && !inst.options.disabled) {
 580                                                 queries.push([$.isFunction(inst.options.items) ? inst.options.items.call(inst.element[0], event, { item: this.currentItem }) : $(inst.options.items, inst.element), inst]);
 581                                                 this.containers.push(inst);
 582                                         }
 583                                 };
 584                         };
 585                 }
 586
 587                 for (var i = queries.length - 1; i >= 0; i--) {
 588                         var targetData = queries[i][1];
 589                         var _queries = queries[i][0];
 590
 591                         for (var j=0, queriesLength = _queries.length; j < queriesLength; j++) {
 592                                 var item = $(_queries[j]);
 593
 594                                 item.data(this.widgetName + '-item', targetData); // Data for target checking (mouse manager)
 595
 596                                 items.push({
 597                                         item: item,
 598                                         instance: targetData,
 599                                         width: 0, height: 0,
 600                                         left: 0, top: 0
 601                                 });
 602                         };
 603                 };
 604
 605         },
 606
 607         refreshPositions: function(fast) {
 608
 609                 //This has to be redone because due to the item being moved out/into the offsetParent, the offsetParent's position will change
 610                 if(this.offsetParent && this.helper) {
 611                         this.offset.parent = this._getParentOffset();
 612                 }
 613
 614                 for (var i = this.items.length - 1; i >= 0; i--){
 615                         var item = this.items[i];
 616
 617                         //We ignore calculating positions of all connected containers when we're not over them
 618                         if(item.instance != this.currentContainer && this.currentContainer && item.item[0] != this.currentItem[0])
 619                                 continue;
 620
 621                         var t = this.options.toleranceElement ? $(this.options.toleranceElement, item.item) : item.item;
 622
 623                         if (!fast) {
 624                                 item.width = t.outerWidth();
 625                                 item.height = t.outerHeight();
 626                         }
 627
 628                         var p = t.offset();
 629                         item.left = p.left;
 630                         item.top = p.top;
 631                 };
 632
 633                 if(this.options.custom && this.options.custom.refreshContainers) {
 634                         this.options.custom.refreshContainers.call(this);
 635                 } else {
 636                         for (var i = this.containers.length - 1; i >= 0; i--){
 637                                 var p = this.containers[i].element.offset();
 638                                 this.containers[i].containerCache.left = p.left;
 639                                 this.containers[i].containerCache.top = p.top;
 640                                 this.containers[i].containerCache.width = this.containers[i].element.outerWidth();
 641                                 this.containers[i].containerCache.height = this.containers[i].element.outerHeight();
 642                         };
 643                 }
 644
 645                 return this;
 646         },
 647
 648         _createPlaceholder: function(that) {
 649
 650                 var self = that || this, o = self.options;
 651
 652                 if(!o.placeholder || o.placeholder.constructor == String) {
 653                         var className = o.placeholder;
 654                         o.placeholder = {
 655                                 element: function() {
 656
 657                                         var el = $(document.createElement(self.currentItem[0].nodeName))
 658                                                 .addClass(className || self.currentItem[0].className+" ui-sortable-placeholder")
 659                                                 .removeClass("ui-sortable-helper")[0];
 660
 661                                         if(!className)
 662                                                 el.style.visibility = "hidden";
 663
 664                                         return el;
 665                                 },
 666                                 update: function(container, p) {
 667
 668                                         // 1. If a className is set as 'placeholder option, we don't force sizes - the class is responsible for that
 669                                         // 2. The option 'forcePlaceholderSize can be enabled to force it even if a class name is specified
 670                                         if(className && !o.forcePlaceholderSize) return;
 671
 672                                         //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
 673                                         if(!p.height()) { p.height(self.currentItem.innerHeight() - parseInt(self.currentItem.css('paddingTop')||0, 10) - parseInt(self.currentItem.css('paddingBottom')||0, 10)); };
 674                                         if(!p.width()) { p.width(self.currentItem.innerWidth() - parseInt(self.currentItem.css('paddingLeft')||0, 10) - parseInt(self.currentItem.css('paddingRight')||0, 10)); };
 675                                 }
 676                         };
 677                 }
 678
 679                 //Create the placeholder
 680                 self.placeholder = $(o.placeholder.element.call(self.element, self.currentItem));
 681
 682                 //Append it after the actual current item
 683                 self.currentItem.after(self.placeholder);
 684
 685                 //Update the size of the placeholder (TODO: Logic to fuzzy, see line 316/317)
 686                 o.placeholder.update(self, self.placeholder);
 687
 688         },
 689
 690         _contactContainers: function(event) {
 691
 692                 // get innermost container that intersects with item
 693                 var innermostContainer = null, innermostIndex = null;
 694
 695
 696                 for (var i = this.containers.length - 1; i >= 0; i--){
 697
 698                         // never consider a container that's located within the item itself
 699                         if($.ui.contains(this.currentItem[0], this.containers[i].element[0]))
 700                                 continue;
 701
 702                         if(this._intersectsWith(this.containers[i].containerCache)) {
 703
 704                                 // if we've already found a container and it's more "inner" than this, then continue
 705                                 if(innermostContainer && $.ui.contains(this.containers[i].element[0], innermostContainer.element[0]))
 706                                         continue;
 707
 708                                 innermostContainer = this.containers[i];
 709                                 innermostIndex = i;
 710
 711                         } else {
 712                                 // container doesn't intersect. trigger "out" event if necessary
 713                                 if(this.containers[i].containerCache.over) {
 714                                         this.containers[i]._trigger("out", event, this._uiHash(this));
 715                                         this.containers[i].containerCache.over = 0;
 716                                 }
 717                         }
 718
 719                 }
 720
 721                 // if no intersecting containers found, return
 722                 if(!innermostContainer) return;
 723
 724                 // move the item into the container if it's not there already
 725                 if(this.containers.length === 1) {
 726                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 727                         this.containers[innermostIndex].containerCache.over = 1;
 728                 } else if(this.currentContainer != this.containers[innermostIndex]) {
 729
 730                         //When entering a new container, we will find the item with the least distance and append our item near it
 731                         var dist = 10000; var itemWithLeastDistance = null; var base = this.positionAbs[this.containers[innermostIndex].floating ? 'left' : 'top'];
 732                         for (var j = this.items.length - 1; j >= 0; j--) {
 733                                 if(!$.ui.contains(this.containers[innermostIndex].element[0], this.items[j].item[0])) continue;
 734                                 var cur = this.items[j][this.containers[innermostIndex].floating ? 'left' : 'top'];
 735                                 if(Math.abs(cur - base) < dist) {
 736                                         dist = Math.abs(cur - base); itemWithLeastDistance = this.items[j];
 737                                 }
 738                         }
 739
 740                         if(!itemWithLeastDistance && !this.options.dropOnEmpty) //Check if dropOnEmpty is enabled
 741                                 return;
 742
 743                         this.currentContainer = this.containers[innermostIndex];
 744                         itemWithLeastDistance ? this._rearrange(event, itemWithLeastDistance, null, true) : this._rearrange(event, null, this.containers[innermostIndex].element, true);
 745                         this._trigger("change", event, this._uiHash());
 746                         this.containers[innermostIndex]._trigger("change", event, this._uiHash(this));
 747
 748                         //Update the placeholder
 749                         this.options.placeholder.update(this.currentContainer, this.placeholder);
 750
 751                         this.containers[innermostIndex]._trigger("over", event, this._uiHash(this));
 752                         this.containers[innermostIndex].containerCache.over = 1;
 753                 }
 754
 755
 756         },
 757
 758         _createHelper: function(event) {
 759
 760                 var o = this.options;
 761                 var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event, this.currentItem])) : (o.helper == 'clone' ? this.currentItem.clone() : this.currentItem);
 762
 763                 if(!helper.parents('body').length) //Add the helper to the DOM if that didn't happen already
 764                         $(o.appendTo != 'parent' ? o.appendTo : this.currentItem[0].parentNode)[0].appendChild(helper[0]);
 765
 766                 if(helper[0] == this.currentItem[0])
 767                         this._storedCSS = { width: this.currentItem[0].style.width, height: this.currentItem[0].style.height, position: this.currentItem.css("position"), top: this.currentItem.css("top"), left: this.currentItem.css("left") };
 768
 769                 if(helper[0].style.width == '' || o.forceHelperSize) helper.width(this.currentItem.width());
 770                 if(helper[0].style.height == '' || o.forceHelperSize) helper.height(this.currentItem.height());
 771
 772                 return helper;
 773
 774         },
 775
 776         _adjustOffsetFromHelper: function(obj) {
 777                 if (typeof obj == 'string') {
 778                         obj = obj.split(' ');
 779                 }
 780                 if ($.isArray(obj)) {
 781                         obj = {left: +obj[0], top: +obj[1] || 0};
 782                 }
 783                 if ('left' in obj) {
 784                         this.offset.click.left = obj.left + this.margins.left;
 785                 }
 786                 if ('right' in obj) {
 787                         this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 788                 }
 789                 if ('top' in obj) {
 790                         this.offset.click.top = obj.top + this.margins.top;
 791                 }
 792                 if ('bottom' in obj) {
 793                         this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 794                 }
 795         },
 796
 797         _getParentOffset: function() {
 798
 799
 800                 //Get the offsetParent and cache its position
 801                 this.offsetParent = this.helper.offsetParent();
 802                 var po = this.offsetParent.offset();
 803
 804                 // This is a special case where we need to modify a offset calculated on start, since the following happened:
 805                 // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
 806                 // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
 807                 //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
 808                 if(this.cssPosition == 'absolute' && this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) {
 809                         po.left += this.scrollParent.scrollLeft();
 810                         po.top += this.scrollParent.scrollTop();
 811                 }
 812
 813                 if((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
 814                 || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix
 815                         po = { top: 0, left: 0 };
 816
 817                 return {
 818                         top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
 819                         left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
 820                 };
 821
 822         },
 823
 824         _getRelativeOffset: function() {
 825
 826                 if(this.cssPosition == "relative") {
 827                         var p = this.currentItem.position();
 828                         return {
 829                                 top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(),
 830                                 left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft()
 831                         };
 832                 } else {
 833                         return { top: 0, left: 0 };
 834                 }
 835
 836         },
 837
 838         _cacheMargins: function() {
 839                 this.margins = {
 840                         left: (parseInt(this.currentItem.css("marginLeft"),10) || 0),
 841                         top: (parseInt(this.currentItem.css("marginTop"),10) || 0)
 842                 };
 843         },
 844
 845         _cacheHelperProportions: function() {
 846                 this.helperProportions = {
 847                         width: this.helper.outerWidth(),
 848                         height: this.helper.outerHeight()
 849                 };
 850         },
 851
 852         _setContainment: function() {
 853
 854                 var o = this.options;
 855                 if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
 856                 if(o.containment == 'document' || o.containment == 'window') this.containment = [
 857                         0 - this.offset.relative.left - this.offset.parent.left,
 858                         0 - this.offset.relative.top - this.offset.parent.top,
 859                         $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
 860                         ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
 861                 ];
 862
 863                 if(!(/^(document|window|parent)$/).test(o.containment)) {
 864                         var ce = $(o.containment)[0];
 865                         var co = $(o.containment).offset();
 866                         var over = ($(ce).css("overflow") != 'hidden');
 867
 868                         this.containment = [
 869                                 co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) + (parseInt($(ce).css("paddingLeft"),10) || 0) - this.margins.left,
 870                                 co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) + (parseInt($(ce).css("paddingTop"),10) || 0) - this.margins.top,
 871                                 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,
 872                                 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
 873                         ];
 874                 }
 875
 876         },
 877
 878         _convertPositionTo: function(d, pos) {
 879
 880                 if(!pos) pos = this.position;
 881                 var mod = d == "absolute" ? 1 : -1;
 882                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.ui.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 883
 884                 return {
 885                         top: (
 886                                 pos.top                                                                                                                                 // The absolute mouse position
 887                                 + this.offset.relative.top * mod                                                                                // Only for relative positioned nodes: Relative offset from element to offset parent
 888                                 + this.offset.parent.top * mod                                                                                  // The offsetParent's offset without borders (offset + border)
 889                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
 890                         ),
 891                         left: (
 892                                 pos.left                                                                                                                                // The absolute mouse position
 893                                 + this.offset.relative.left * mod                                                                               // Only for relative positioned nodes: Relative offset from element to offset parent
 894                                 + this.offset.parent.left * mod                                                                                 // The offsetParent's offset without borders (offset + border)
 895                                 - ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod)
 896                         )
 897                 };
 898
 899         },
 900
 901         _generatePosition: function(event) {
 902
 903                 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);
 904
 905                 // This is another very weird special case that only happens for relative elements:
 906                 // 1. If the css position is relative
 907                 // 2. and the scroll parent is the document or similar to the offset parent
 908                 // we have to refresh the relative offset during the scroll so there are no jumps
 909                 if(this.cssPosition == 'relative' && !(this.scrollParent[0] != document && this.scrollParent[0] != this.offsetParent[0])) {
 910                         this.offset.relative = this._getRelativeOffset();
 911                 }
 912
 913                 var pageX = event.pageX;
 914                 var pageY = event.pageY;
 915
 916                 /*
 917                  * - Position constraining -
 918                  * Constrain the position to a mix of grid, containment.
 919                  */
 920
 921                 if(this.originalPosition) { //If we are not dragging yet, we won't check for options
 922
 923                         if(this.containment) {
 924                                 if(event.pageX - this.offset.click.left < this.containment[0]) pageX = this.containment[0] + this.offset.click.left;
 925                                 if(event.pageY - this.offset.click.top < this.containment[1]) pageY = this.containment[1] + this.offset.click.top;
 926                                 if(event.pageX - this.offset.click.left > this.containment[2]) pageX = this.containment[2] + this.offset.click.left;
 927                                 if(event.pageY - this.offset.click.top > this.containment[3]) pageY = this.containment[3] + this.offset.click.top;
 928                         }
 929
 930                         if(o.grid) {
 931                                 var top = this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1];
 932                                 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;
 933
 934                                 var left = this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0];
 935                                 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;
 936                         }
 937
 938                 }
 939
 940                 return {
 941                         top: (
 942                                 pageY                                                                                                                           // The absolute mouse position
 943                                 - this.offset.click.top                                                                                                 // Click offset (relative to the element)
 944                                 - this.offset.relative.top                                                                                              // Only for relative positioned nodes: Relative offset from element to offset parent
 945                                 - this.offset.parent.top                                                                                                // The offsetParent's offset without borders (offset + border)
 946                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
 947                         ),
 948                         left: (
 949                                 pageX                                                                                                                           // The absolute mouse position
 950                                 - this.offset.click.left                                                                                                // Click offset (relative to the element)
 951                                 - this.offset.relative.left                                                                                             // Only for relative positioned nodes: Relative offset from element to offset parent
 952                                 - this.offset.parent.left                                                                                               // The offsetParent's offset without borders (offset + border)
 953                                 + ($.browser.safari && this.cssPosition == 'fixed' ? 0 : ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ))
 954                         )
 955                 };
 956
 957         },
 958
 959         _rearrange: function(event, i, a, hardRefresh) {
 960
 961                 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));
 962
 963                 //Various things done here to improve the performance:
 964                 // 1. we create a setTimeout, that calls refreshPositions
 965                 // 2. on the instance, we have a counter variable, that get's higher after every append
 966                 // 3. on the local scope, we copy the counter variable, and check in the timeout, if it's still the same
 967                 // 4. this lets only the last addition to the timeout stack through
 968                 this.counter = this.counter ? ++this.counter : 1;
 969                 var self = this, counter = this.counter;
 970
 971                 window.setTimeout(function() {
 972                         if(counter == self.counter) self.refreshPositions(!hardRefresh); //Precompute after each DOM insertion, NOT on mousemove
 973                 },0);
 974
 975         },
 976
 977         _clear: function(event, noPropagation) {
 978
 979                 this.reverting = false;
 980                 // We delay all events that have to be triggered to after the point where the placeholder has been removed and
 981                 // everything else normalized again
 982                 var delayedTriggers = [], self = this;
 983
 984                 // We first have to update the dom position of the actual currentItem
 985                 // Note: don't do it if the current item is already removed (by a user), or it gets reappended (see #4088)
 986                 if(!this._noFinalSort && this.currentItem.parent().length) this.placeholder.before(this.currentItem);
 987                 this._noFinalSort = null;
 988
 989                 if(this.helper[0] == this.currentItem[0]) {
 990                         for(var i in this._storedCSS) {
 991                                 if(this._storedCSS[i] == 'auto' || this._storedCSS[i] == 'static') this._storedCSS[i] = '';
 992                         }
 993                         this.currentItem.css(this._storedCSS).removeClass("ui-sortable-helper");
 994                 } else {
 995                         this.currentItem.show();
 996                 }
 997
 998                 if(this.fromOutside && !noPropagation) delayedTriggers.push(function(event) { this._trigger("receive", event, this._uiHash(this.fromOutside)); });
 999                 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
1000                 if(!$.ui.contains(this.element[0], this.currentItem[0])) { //Node was moved out of the current element
1001                         if(!noPropagation) delayedTriggers.push(function(event) { this._trigger("remove", event, this._uiHash()); });
1002                         for (var i = this.containers.length - 1; i >= 0; i--){
1003                                 if($.ui.contains(this.containers[i].element[0], this.currentItem[0]) && !noPropagation) {
1004                                         delayedTriggers.push((function(c) { return function(event) { c._trigger("receive", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1005                                         delayedTriggers.push((function(c) { return function(event) { c._trigger("update", event, this._uiHash(this));  }; }).call(this, this.containers[i]));
1006                                 }
1007                         };
1008                 };
1009
1010                 //Post events to containers
1011                 for (var i = this.containers.length - 1; i >= 0; i--){
1012                         if(!noPropagation) delayedTriggers.push((function(c) { return function(event) { c._trigger("deactivate", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1013                         if(this.containers[i].containerCache.over) {
1014                                 delayedTriggers.push((function(c) { return function(event) { c._trigger("out", event, this._uiHash(this)); };  }).call(this, this.containers[i]));
1015                                 this.containers[i].containerCache.over = 0;
1016                         }
1017                 }
1018
1019                 //Do what was originally in plugins
1020                 if(this._storedCursor) $('body').css("cursor", this._storedCursor); //Reset cursor
1021                 if(this._storedOpacity) this.helper.css("opacity", this._storedOpacity); //Reset opacity
1022                 if(this._storedZIndex) this.helper.css("zIndex", this._storedZIndex == 'auto' ? '' : this._storedZIndex); //Reset z-index
1023
1024                 this.dragging = false;
1025                 if(this.cancelHelperRemoval) {
1026                         if(!noPropagation) {
1027                                 this._trigger("beforeStop", event, this._uiHash());
1028                                 for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1029                                 this._trigger("stop", event, this._uiHash());
1030                         }
1031                         return false;
1032                 }
1033
1034                 if(!noPropagation) this._trigger("beforeStop", event, this._uiHash());
1035
1036                 //$(this.placeholder[0]).remove(); would have been the jQuery way - unfortunately, it unbinds ALL events from the original node!
1037                 this.placeholder[0].parentNode.removeChild(this.placeholder[0]);
1038
1039                 if(this.helper[0] != this.currentItem[0]) this.helper.remove(); this.helper = null;
1040
1041                 if(!noPropagation) {
1042                         for (var i=0; i < delayedTriggers.length; i++) { delayedTriggers[i].call(this, event); }; //Trigger all delayed events
1043                         this._trigger("stop", event, this._uiHash());
1044                 }
1045
1046                 this.fromOutside = false;
1047                 return true;
1048
1049         },
1050
1051         _trigger: function() {
1052                 if ($.Widget.prototype._trigger.apply(this, arguments) === false) {
1053                         this.cancel();
1054                 }
1055         },
1056
1057         _uiHash: function(inst) {
1058                 var self = inst || this;
1059                 return {
1060                         helper: self.helper,
1061                         placeholder: self.placeholder || $([]),
1062                         position: self.position,
1063                         originalPosition: self.originalPosition,
1064                         offset: self.positionAbs,
1065                         item: self.currentItem,
1066                         sender: inst ? inst.element : null
1067                 };
1068         }
1069
1070 });
1071
1072 $.extend($.ui.sortable, {
1073         version: "1.8.17"
1074 });
1075
1076 })(jQuery);