resources/lib/jquery.ui/jquery.ui.draggable.js

   1 /*!
   2  * jQuery UI Draggable 1.9.2
   3  * http://jqueryui.com
   4  *
   5  * Copyright 2012 jQuery Foundation and other contributors
   6  * Released under the MIT license.
   7  * http://jquery.org/license
   8  *
   9  * http://api.jqueryui.com/draggable/
  10  *
  11  * Depends:
  12  *      jquery.ui.core.js
  13  *      jquery.ui.mouse.js
  14  *      jquery.ui.widget.js
  15  */
  16 (function( $, undefined ) {
  17
  18 $.widget("ui.draggable", $.ui.mouse, {
  19         version: "1.9.2",
  20         widgetEventPrefix: "drag",
  21         options: {
  22                 addClasses: true,
  23                 appendTo: "parent",
  24                 axis: false,
  25                 connectToSortable: false,
  26                 containment: false,
  27                 cursor: "auto",
  28                 cursorAt: false,
  29                 grid: false,
  30                 handle: false,
  31                 helper: "original",
  32                 iframeFix: false,
  33                 opacity: false,
  34                 refreshPositions: false,
  35                 revert: false,
  36                 revertDuration: 500,
  37                 scope: "default",
  38                 scroll: true,
  39                 scrollSensitivity: 20,
  40                 scrollSpeed: 20,
  41                 snap: false,
  42                 snapMode: "both",
  43                 snapTolerance: 20,
  44                 stack: false,
  45                 zIndex: false
  46         },
  47         _create: function() {
  48
  49                 if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position")))
  50                         this.element[0].style.position = 'relative';
  51
  52                 (this.options.addClasses && this.element.addClass("ui-draggable"));
  53                 (this.options.disabled && this.element.addClass("ui-draggable-disabled"));
  54
  55                 this._mouseInit();
  56
  57         },
  58
  59         _destroy: function() {
  60                 this.element.removeClass( "ui-draggable ui-draggable-dragging ui-draggable-disabled" );
  61                 this._mouseDestroy();
  62         },
  63
  64         _mouseCapture: function(event) {
  65
  66                 var o = this.options;
  67
  68                 // among others, prevent a drag on a resizable-handle
  69                 if (this.helper || o.disabled || $(event.target).is('.ui-resizable-handle'))
  70                         return false;
  71
  72                 //Quit if we're not on a valid handle
  73                 this.handle = this._getHandle(event);
  74                 if (!this.handle)
  75                         return false;
  76
  77                 $(o.iframeFix === true ? "iframe" : o.iframeFix).each(function() {
  78                         $('<div class="ui-draggable-iframeFix" style="background: #fff;"></div>')
  79                         .css({
  80                                 width: this.offsetWidth+"px", height: this.offsetHeight+"px",
  81                                 position: "absolute", opacity: "0.001", zIndex: 1000
  82                         })
  83                         .css($(this).offset())
  84                         .appendTo("body");
  85                 });
  86
  87                 return true;
  88
  89         },
  90
  91         _mouseStart: function(event) {
  92
  93                 var o = this.options;
  94
  95                 //Create and append the visible helper
  96                 this.helper = this._createHelper(event);
  97
  98                 this.helper.addClass("ui-draggable-dragging");
  99
 100                 //Cache the helper size
 101                 this._cacheHelperProportions();
 102
 103                 //If ddmanager is used for droppables, set the global draggable
 104                 if($.ui.ddmanager)
 105                         $.ui.ddmanager.current = this;
 106
 107                 /*
 108                  * - Position generation -
 109                  * This block generates everything position related - it's the core of draggables.
 110                  */
 111
 112                 //Cache the margins of the original element
 113                 this._cacheMargins();
 114
 115                 //Store the helper's css position
 116                 this.cssPosition = this.helper.css("position");
 117                 this.scrollParent = this.helper.scrollParent();
 118
 119                 //The element's absolute position on the page minus margins
 120                 this.offset = this.positionAbs = this.element.offset();
 121                 this.offset = {
 122                         top: this.offset.top - this.margins.top,
 123                         left: this.offset.left - this.margins.left
 124                 };
 125
 126                 $.extend(this.offset, {
 127                         click: { //Where the click happened, relative to the element
 128                                 left: event.pageX - this.offset.left,
 129                                 top: event.pageY - this.offset.top
 130                         },
 131                         parent: this._getParentOffset(),
 132                         relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
 133                 });
 134
 135                 //Generate the original position
 136                 this.originalPosition = this.position = this._generatePosition(event);
 137                 this.originalPageX = event.pageX;
 138                 this.originalPageY = event.pageY;
 139
 140                 //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
 141                 (o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));
 142
 143                 //Set a containment if given in the options
 144                 if(o.containment)
 145                         this._setContainment();
 146
 147                 //Trigger event + callbacks
 148                 if(this._trigger("start", event) === false) {
 149                         this._clear();
 150                         return false;
 151                 }
 152
 153                 //Recache the helper size
 154                 this._cacheHelperProportions();
 155
 156                 //Prepare the droppable offsets
 157                 if ($.ui.ddmanager && !o.dropBehaviour)
 158                         $.ui.ddmanager.prepareOffsets(this, event);
 159
 160
 161                 this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position
 162
 163                 //If the ddmanager is used for droppables, inform the manager that dragging has started (see #5003)
 164                 if ( $.ui.ddmanager ) $.ui.ddmanager.dragStart(this, event);
 165
 166                 return true;
 167         },
 168
 169         _mouseDrag: function(event, noPropagation) {
 170
 171                 //Compute the helpers position
 172                 this.position = this._generatePosition(event);
 173                 this.positionAbs = this._convertPositionTo("absolute");
 174
 175                 //Call plugins and callbacks and use the resulting position if something is returned
 176                 if (!noPropagation) {
 177                         var ui = this._uiHash();
 178                         if(this._trigger('drag', event, ui) === false) {
 179                                 this._mouseUp({});
 180                                 return false;
 181                         }
 182                         this.position = ui.position;
 183                 }
 184
 185                 if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px';
 186                 if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px';
 187                 if($.ui.ddmanager) $.ui.ddmanager.drag(this, event);
 188
 189                 return false;
 190         },
 191
 192         _mouseStop: function(event) {
 193
 194                 //If we are using droppables, inform the manager about the drop
 195                 var dropped = false;
 196                 if ($.ui.ddmanager && !this.options.dropBehaviour)
 197                         dropped = $.ui.ddmanager.drop(this, event);
 198
 199                 //if a drop comes from outside (a sortable)
 200                 if(this.dropped) {
 201                         dropped = this.dropped;
 202                         this.dropped = false;
 203                 }
 204
 205                 //if the original element is no longer in the DOM don't bother to continue (see #8269)
 206                 var element = this.element[0], elementInDom = false;
 207                 while ( element && (element = element.parentNode) ) {
 208                         if (element == document ) {
 209                                 elementInDom = true;
 210                         }
 211                 }
 212                 if ( !elementInDom && this.options.helper === "original" )
 213                         return false;
 214
 215                 if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) {
 216                         var that = this;
 217                         $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() {
 218                                 if(that._trigger("stop", event) !== false) {
 219                                         that._clear();
 220                                 }
 221                         });
 222                 } else {
 223                         if(this._trigger("stop", event) !== false) {
 224                                 this._clear();
 225                         }
 226                 }
 227
 228                 return false;
 229         },
 230
 231         _mouseUp: function(event) {
 232                 //Remove frame helpers
 233                 $("div.ui-draggable-iframeFix").each(function() {
 234                         this.parentNode.removeChild(this);
 235                 });
 236
 237                 //If the ddmanager is used for droppables, inform the manager that dragging has stopped (see #5003)
 238                 if( $.ui.ddmanager ) $.ui.ddmanager.dragStop(this, event);
 239
 240                 return $.ui.mouse.prototype._mouseUp.call(this, event);
 241         },
 242
 243         cancel: function() {
 244
 245                 if(this.helper.is(".ui-draggable-dragging")) {
 246                         this._mouseUp({});
 247                 } else {
 248                         this._clear();
 249                 }
 250
 251                 return this;
 252
 253         },
 254
 255         _getHandle: function(event) {
 256
 257                 var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false;
 258                 $(this.options.handle, this.element)
 259                         .find("*")
 260                         .andSelf()
 261                         .each(function() {
 262                                 if(this == event.target) handle = true;
 263                         });
 264
 265                 return handle;
 266
 267         },
 268
 269         _createHelper: function(event) {
 270
 271                 var o = this.options;
 272                 var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event])) : (o.helper == 'clone' ? this.element.clone().removeAttr('id') : this.element);
 273
 274                 if(!helper.parents('body').length)
 275                         helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo));
 276
 277                 if(helper[0] != this.element[0] && !(/(fixed|absolute)/).test(helper.css("position")))
 278                         helper.css("position", "absolute");
 279
 280                 return helper;
 281
 282         },
 283
 284         _adjustOffsetFromHelper: function(obj) {
 285                 if (typeof obj == 'string') {
 286                         obj = obj.split(' ');
 287                 }
 288                 if ($.isArray(obj)) {
 289                         obj = {left: +obj[0], top: +obj[1] || 0};
 290                 }
 291                 if ('left' in obj) {
 292                         this.offset.click.left = obj.left + this.margins.left;
 293                 }
 294                 if ('right' in obj) {
 295                         this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 296                 }
 297                 if ('top' in obj) {
 298                         this.offset.click.top = obj.top + this.margins.top;
 299                 }
 300                 if ('bottom' in obj) {
 301                         this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 302                 }
 303         },
 304
 305         _getParentOffset: function() {
 306
 307                 //Get the offsetParent and cache its position
 308                 this.offsetParent = this.helper.offsetParent();
 309                 var po = this.offsetParent.offset();
 310
 311                 // This is a special case where we need to modify a offset calculated on start, since the following happened:
 312                 // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
 313                 // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
 314                 //    the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
 315                 if(this.cssPosition == 'absolute' && this.scrollParent[0] != document && $.contains(this.scrollParent[0], this.offsetParent[0])) {
 316                         po.left += this.scrollParent.scrollLeft();
 317                         po.top += this.scrollParent.scrollTop();
 318                 }
 319
 320                 if((this.offsetParent[0] == document.body) //This needs to be actually done for all browsers, since pageX/pageY includes this information
 321                 || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.ui.ie)) //Ugly IE fix
 322                         po = { top: 0, left: 0 };
 323
 324                 return {
 325                         top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
 326                         left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
 327                 };
 328
 329         },
 330
 331         _getRelativeOffset: function() {
 332
 333                 if(this.cssPosition == "relative") {
 334                         var p = this.element.position();
 335                         return {
 336                                 top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(),
 337                                 left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft()
 338                         };
 339                 } else {
 340                         return { top: 0, left: 0 };
 341                 }
 342
 343         },
 344
 345         _cacheMargins: function() {
 346                 this.margins = {
 347                         left: (parseInt(this.element.css("marginLeft"),10) || 0),
 348                         top: (parseInt(this.element.css("marginTop"),10) || 0),
 349                         right: (parseInt(this.element.css("marginRight"),10) || 0),
 350                         bottom: (parseInt(this.element.css("marginBottom"),10) || 0)
 351                 };
 352         },
 353
 354         _cacheHelperProportions: function() {
 355                 this.helperProportions = {
 356                         width: this.helper.outerWidth(),
 357                         height: this.helper.outerHeight()
 358                 };
 359         },
 360
 361         _setContainment: function() {
 362
 363                 var o = this.options;
 364                 if(o.containment == 'parent') o.containment = this.helper[0].parentNode;
 365                 if(o.containment == 'document' || o.containment == 'window') this.containment = [
 366                         o.containment == 'document' ? 0 : $(window).scrollLeft() - this.offset.relative.left - this.offset.parent.left,
 367                         o.containment == 'document' ? 0 : $(window).scrollTop() - this.offset.relative.top - this.offset.parent.top,
 368                         (o.containment == 'document' ? 0 : $(window).scrollLeft()) + $(o.containment == 'document' ? document : window).width() - this.helperProportions.width - this.margins.left,
 369                         (o.containment == 'document' ? 0 : $(window).scrollTop()) + ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.helperProportions.height - this.margins.top
 370                 ];
 371
 372                 if(!(/^(document|window|parent)$/).test(o.containment) && o.containment.constructor != Array) {
 373                         var c = $(o.containment);
 374                         var ce = c[0]; if(!ce) return;
 375                         var co = c.offset();
 376                         var over = ($(ce).css("overflow") != 'hidden');
 377
 378                         this.containment = [
 379                                 (parseInt($(ce).css("borderLeftWidth"),10) || 0) + (parseInt($(ce).css("paddingLeft"),10) || 0),
 380                                 (parseInt($(ce).css("borderTopWidth"),10) || 0) + (parseInt($(ce).css("paddingTop"),10) || 0),
 381                                 (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 - this.margins.right,
 382                                 (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  - this.margins.bottom
 383                         ];
 384                         this.relative_container = c;
 385
 386                 } else if(o.containment.constructor == Array) {
 387                         this.containment = o.containment;
 388                 }
 389
 390         },
 391
 392         _convertPositionTo: function(d, pos) {
 393
 394                 if(!pos) pos = this.position;
 395                 var mod = d == "absolute" ? 1 : -1;
 396                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 397
 398                 return {
 399                         top: (
 400                                 pos.top                                                                                                                                 // The absolute mouse position
 401                                 + this.offset.relative.top * mod                                                                                // Only for relative positioned nodes: Relative offset from element to offset parent
 402                                 + this.offset.parent.top * mod                                                                                  // The offsetParent's offset without borders (offset + border)
 403                                 - ( ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
 404                         ),
 405                         left: (
 406                                 pos.left                                                                                                                                // The absolute mouse position
 407                                 + this.offset.relative.left * mod                                                                               // Only for relative positioned nodes: Relative offset from element to offset parent
 408                                 + this.offset.parent.left * mod                                                                                 // The offsetParent's offset without borders (offset + border)
 409                                 - ( ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod)
 410                         )
 411                 };
 412
 413         },
 414
 415         _generatePosition: function(event) {
 416
 417                 var o = this.options, scroll = this.cssPosition == 'absolute' && !(this.scrollParent[0] != document && $.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
 418                 var pageX = event.pageX;
 419                 var pageY = event.pageY;
 420
 421                 /*
 422                  * - Position constraining -
 423                  * Constrain the position to a mix of grid, containment.
 424                  */
 425
 426                 if(this.originalPosition) { //If we are not dragging yet, we won't check for options
 427                         var containment;
 428                         if(this.containment) {
 429                         if (this.relative_container){
 430                                 var co = this.relative_container.offset();
 431                                 containment = [ this.containment[0] + co.left,
 432                                         this.containment[1] + co.top,
 433                                         this.containment[2] + co.left,
 434                                         this.containment[3] + co.top ];
 435                         }
 436                         else {
 437                                 containment = this.containment;
 438                         }
 439
 440                                 if(event.pageX - this.offset.click.left < containment[0]) pageX = containment[0] + this.offset.click.left;
 441                                 if(event.pageY - this.offset.click.top < containment[1]) pageY = containment[1] + this.offset.click.top;
 442                                 if(event.pageX - this.offset.click.left > containment[2]) pageX = containment[2] + this.offset.click.left;
 443                                 if(event.pageY - this.offset.click.top > containment[3]) pageY = containment[3] + this.offset.click.top;
 444                         }
 445
 446                         if(o.grid) {
 447                                 //Check for grid elements set to 0 to prevent divide by 0 error causing invalid argument errors in IE (see ticket #6950)
 448                                 var top = o.grid[1] ? this.originalPageY + Math.round((pageY - this.originalPageY) / o.grid[1]) * o.grid[1] : this.originalPageY;
 449                                 pageY = containment ? (!(top - this.offset.click.top < containment[1] || top - this.offset.click.top > containment[3]) ? top : (!(top - this.offset.click.top < containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top;
 450
 451                                 var left = o.grid[0] ? this.originalPageX + Math.round((pageX - this.originalPageX) / o.grid[0]) * o.grid[0] : this.originalPageX;
 452                                 pageX = containment ? (!(left - this.offset.click.left < containment[0] || left - this.offset.click.left > containment[2]) ? left : (!(left - this.offset.click.left < containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left;
 453                         }
 454
 455                 }
 456
 457                 return {
 458                         top: (
 459                                 pageY                                                                                                                           // The absolute mouse position
 460                                 - this.offset.click.top                                                                                                 // Click offset (relative to the element)
 461                                 - this.offset.relative.top                                                                                              // Only for relative positioned nodes: Relative offset from element to offset parent
 462                                 - this.offset.parent.top                                                                                                // The offsetParent's offset without borders (offset + border)
 463                                 + ( ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ))
 464                         ),
 465                         left: (
 466                                 pageX                                                                                                                           // The absolute mouse position
 467                                 - this.offset.click.left                                                                                                // Click offset (relative to the element)
 468                                 - this.offset.relative.left                                                                                             // Only for relative positioned nodes: Relative offset from element to offset parent
 469                                 - this.offset.parent.left                                                                                               // The offsetParent's offset without borders (offset + border)
 470                                 + ( ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ))
 471                         )
 472                 };
 473
 474         },
 475
 476         _clear: function() {
 477                 this.helper.removeClass("ui-draggable-dragging");
 478                 if(this.helper[0] != this.element[0] && !this.cancelHelperRemoval) this.helper.remove();
 479                 //if($.ui.ddmanager) $.ui.ddmanager.current = null;
 480                 this.helper = null;
 481                 this.cancelHelperRemoval = false;
 482         },
 483
 484         // From now on bulk stuff - mainly helpers
 485
 486         _trigger: function(type, event, ui) {
 487                 ui = ui || this._uiHash();
 488                 $.ui.plugin.call(this, type, [event, ui]);
 489                 if(type == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins
 490                 return $.Widget.prototype._trigger.call(this, type, event, ui);
 491         },
 492
 493         plugins: {},
 494
 495         _uiHash: function(event) {
 496                 return {
 497                         helper: this.helper,
 498                         position: this.position,
 499                         originalPosition: this.originalPosition,
 500                         offset: this.positionAbs
 501                 };
 502         }
 503
 504 });
 505
 506 $.ui.plugin.add("draggable", "connectToSortable", {
 507         start: function(event, ui) {
 508
 509                 var inst = $(this).data("draggable"), o = inst.options,
 510                         uiSortable = $.extend({}, ui, { item: inst.element });
 511                 inst.sortables = [];
 512                 $(o.connectToSortable).each(function() {
 513                         var sortable = $.data(this, 'sortable');
 514                         if (sortable && !sortable.options.disabled) {
 515                                 inst.sortables.push({
 516                                         instance: sortable,
 517                                         shouldRevert: sortable.options.revert
 518                                 });
 519                                 sortable.refreshPositions();    // Call the sortable's refreshPositions at drag start to refresh the containerCache since the sortable container cache is used in drag and needs to be up to date (this will ensure it's initialised as well as being kept in step with any changes that might have happened on the page).
 520                                 sortable._trigger("activate", event, uiSortable);
 521                         }
 522                 });
 523
 524         },
 525         stop: function(event, ui) {
 526
 527                 //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper
 528                 var inst = $(this).data("draggable"),
 529                         uiSortable = $.extend({}, ui, { item: inst.element });
 530
 531                 $.each(inst.sortables, function() {
 532                         if(this.instance.isOver) {
 533
 534                                 this.instance.isOver = 0;
 535
 536                                 inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance
 537                                 this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work)
 538
 539                                 //The sortable revert is supported, and we have to set a temporary dropped variable on the draggable to support revert: 'valid/invalid'
 540                                 if(this.shouldRevert) this.instance.options.revert = true;
 541
 542                                 //Trigger the stop of the sortable
 543                                 this.instance._mouseStop(event);
 544
 545                                 this.instance.options.helper = this.instance.options._helper;
 546
 547                                 //If the helper has been the original item, restore properties in the sortable
 548                                 if(inst.options.helper == 'original')
 549                                         this.instance.currentItem.css({ top: 'auto', left: 'auto' });
 550
 551                         } else {
 552                                 this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance
 553                                 this.instance._trigger("deactivate", event, uiSortable);
 554                         }
 555
 556                 });
 557
 558         },
 559         drag: function(event, ui) {
 560
 561                 var inst = $(this).data("draggable"), that = this;
 562
 563                 var checkPos = function(o) {
 564                         var dyClick = this.offset.click.top, dxClick = this.offset.click.left;
 565                         var helperTop = this.positionAbs.top, helperLeft = this.positionAbs.left;
 566                         var itemHeight = o.height, itemWidth = o.width;
 567                         var itemTop = o.top, itemLeft = o.left;
 568
 569                         return $.ui.isOver(helperTop + dyClick, helperLeft + dxClick, itemTop, itemLeft, itemHeight, itemWidth);
 570                 };
 571
 572                 $.each(inst.sortables, function(i) {
 573
 574                         var innermostIntersecting = false;
 575                         var thisSortable = this;
 576                         //Copy over some variables to allow calling the sortable's native _intersectsWith
 577                         this.instance.positionAbs = inst.positionAbs;
 578                         this.instance.helperProportions = inst.helperProportions;
 579                         this.instance.offset.click = inst.offset.click;
 580
 581                         if(this.instance._intersectsWith(this.instance.containerCache)) {
 582                                 innermostIntersecting = true;
 583                                 $.each(inst.sortables, function () {
 584                                         this.instance.positionAbs = inst.positionAbs;
 585                                         this.instance.helperProportions = inst.helperProportions;
 586                                         this.instance.offset.click = inst.offset.click;
 587                                         if  (this != thisSortable
 588                                                 && this.instance._intersectsWith(this.instance.containerCache)
 589                                                 && $.ui.contains(thisSortable.instance.element[0], this.instance.element[0]))
 590                                                 innermostIntersecting = false;
 591                                                 return innermostIntersecting;
 592                                 });
 593                         }
 594
 595
 596                         if(innermostIntersecting) {
 597                                 //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once
 598                                 if(!this.instance.isOver) {
 599
 600                                         this.instance.isOver = 1;
 601                                         //Now we fake the start of dragging for the sortable instance,
 602                                         //by cloning the list group item, appending it to the sortable and using it as inst.currentItem
 603                                         //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one)
 604                                         this.instance.currentItem = $(that).clone().removeAttr('id').appendTo(this.instance.element).data("sortable-item", true);
 605                                         this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it
 606                                         this.instance.options.helper = function() { return ui.helper[0]; };
 607
 608                                         event.target = this.instance.currentItem[0];
 609                                         this.instance._mouseCapture(event, true);
 610                                         this.instance._mouseStart(event, true, true);
 611
 612                                         //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes
 613                                         this.instance.offset.click.top = inst.offset.click.top;
 614                                         this.instance.offset.click.left = inst.offset.click.left;
 615                                         this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left;
 616                                         this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top;
 617
 618                                         inst._trigger("toSortable", event);
 619                                         inst.dropped = this.instance.element; //draggable revert needs that
 620                                         //hack so receive/update callbacks work (mostly)
 621                                         inst.currentItem = inst.element;
 622                                         this.instance.fromOutside = inst;
 623
 624                                 }
 625
 626                                 //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable
 627                                 if(this.instance.currentItem) this.instance._mouseDrag(event);
 628
 629                         } else {
 630
 631                                 //If it doesn't intersect with the sortable, and it intersected before,
 632                                 //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval
 633                                 if(this.instance.isOver) {
 634
 635                                         this.instance.isOver = 0;
 636                                         this.instance.cancelHelperRemoval = true;
 637
 638                                         //Prevent reverting on this forced stop
 639                                         this.instance.options.revert = false;
 640
 641                                         // The out event needs to be triggered independently
 642                                         this.instance._trigger('out', event, this.instance._uiHash(this.instance));
 643
 644                                         this.instance._mouseStop(event, true);
 645                                         this.instance.options.helper = this.instance.options._helper;
 646
 647                                         //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size
 648                                         this.instance.currentItem.remove();
 649                                         if(this.instance.placeholder) this.instance.placeholder.remove();
 650
 651                                         inst._trigger("fromSortable", event);
 652                                         inst.dropped = false; //draggable revert needs that
 653                                 }
 654
 655                         };
 656
 657                 });
 658
 659         }
 660 });
 661
 662 $.ui.plugin.add("draggable", "cursor", {
 663         start: function(event, ui) {
 664                 var t = $('body'), o = $(this).data('draggable').options;
 665                 if (t.css("cursor")) o._cursor = t.css("cursor");
 666                 t.css("cursor", o.cursor);
 667         },
 668         stop: function(event, ui) {
 669                 var o = $(this).data('draggable').options;
 670                 if (o._cursor) $('body').css("cursor", o._cursor);
 671         }
 672 });
 673
 674 $.ui.plugin.add("draggable", "opacity", {
 675         start: function(event, ui) {
 676                 var t = $(ui.helper), o = $(this).data('draggable').options;
 677                 if(t.css("opacity")) o._opacity = t.css("opacity");
 678                 t.css('opacity', o.opacity);
 679         },
 680         stop: function(event, ui) {
 681                 var o = $(this).data('draggable').options;
 682                 if(o._opacity) $(ui.helper).css('opacity', o._opacity);
 683         }
 684 });
 685
 686 $.ui.plugin.add("draggable", "scroll", {
 687         start: function(event, ui) {
 688                 var i = $(this).data("draggable");
 689                 if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') i.overflowOffset = i.scrollParent.offset();
 690         },
 691         drag: function(event, ui) {
 692
 693                 var i = $(this).data("draggable"), o = i.options, scrolled = false;
 694
 695                 if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') {
 696
 697                         if(!o.axis || o.axis != 'x') {
 698                                 if((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity)
 699                                         i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed;
 700                                 else if(event.pageY - i.overflowOffset.top < o.scrollSensitivity)
 701                                         i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed;
 702                         }
 703
 704                         if(!o.axis || o.axis != 'y') {
 705                                 if((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity)
 706                                         i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed;
 707                                 else if(event.pageX - i.overflowOffset.left < o.scrollSensitivity)
 708                                         i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed;
 709                         }
 710
 711                 } else {
 712
 713                         if(!o.axis || o.axis != 'x') {
 714                                 if(event.pageY - $(document).scrollTop() < o.scrollSensitivity)
 715                                         scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed);
 716                                 else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity)
 717                                         scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed);
 718                         }
 719
 720                         if(!o.axis || o.axis != 'y') {
 721                                 if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity)
 722                                         scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed);
 723                                 else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity)
 724                                         scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed);
 725                         }
 726
 727                 }
 728
 729                 if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour)
 730                         $.ui.ddmanager.prepareOffsets(i, event);
 731
 732         }
 733 });
 734
 735 $.ui.plugin.add("draggable", "snap", {
 736         start: function(event, ui) {
 737
 738                 var i = $(this).data("draggable"), o = i.options;
 739                 i.snapElements = [];
 740
 741                 $(o.snap.constructor != String ? ( o.snap.items || ':data(draggable)' ) : o.snap).each(function() {
 742                         var $t = $(this); var $o = $t.offset();
 743                         if(this != i.element[0]) i.snapElements.push({
 744                                 item: this,
 745                                 width: $t.outerWidth(), height: $t.outerHeight(),
 746                                 top: $o.top, left: $o.left
 747                         });
 748                 });
 749
 750         },
 751         drag: function(event, ui) {
 752
 753                 var inst = $(this).data("draggable"), o = inst.options;
 754                 var d = o.snapTolerance;
 755
 756                 var x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
 757                         y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;
 758
 759                 for (var i = inst.snapElements.length - 1; i >= 0; i--){
 760
 761                         var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width,
 762                                 t = inst.snapElements[i].top, b = t + inst.snapElements[i].height;
 763
 764                         //Yes, I know, this is insane ;)
 765                         if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) {
 766                                 if(inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
 767                                 inst.snapElements[i].snapping = false;
 768                                 continue;
 769                         }
 770
 771                         if(o.snapMode != 'inner') {
 772                                 var ts = Math.abs(t - y2) <= d;
 773                                 var bs = Math.abs(b - y1) <= d;
 774                                 var ls = Math.abs(l - x2) <= d;
 775                                 var rs = Math.abs(r - x1) <= d;
 776                                 if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
 777                                 if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top;
 778                                 if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left - inst.margins.left;
 779                                 if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left;
 780                         }
 781
 782                         var first = (ts || bs || ls || rs);
 783
 784                         if(o.snapMode != 'outer') {
 785                                 var ts = Math.abs(t - y1) <= d;
 786                                 var bs = Math.abs(b - y2) <= d;
 787                                 var ls = Math.abs(l - x1) <= d;
 788                                 var rs = Math.abs(r - x2) <= d;
 789                                 if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top;
 790                                 if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
 791                                 if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left;
 792                                 if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left - inst.margins.left;
 793                         }
 794
 795                         if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first))
 796                                 (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item })));
 797                         inst.snapElements[i].snapping = (ts || bs || ls || rs || first);
 798
 799                 };
 800
 801         }
 802 });
 803
 804 $.ui.plugin.add("draggable", "stack", {
 805         start: function(event, ui) {
 806
 807                 var o = $(this).data("draggable").options;
 808
 809                 var group = $.makeArray($(o.stack)).sort(function(a,b) {
 810                         return (parseInt($(a).css("zIndex"),10) || 0) - (parseInt($(b).css("zIndex"),10) || 0);
 811                 });
 812                 if (!group.length) { return; }
 813
 814                 var min = parseInt(group[0].style.zIndex) || 0;
 815                 $(group).each(function(i) {
 816                         this.style.zIndex = min + i;
 817                 });
 818
 819                 this[0].style.zIndex = min + group.length;
 820
 821         }
 822 });
 823
 824 $.ui.plugin.add("draggable", "zIndex", {
 825         start: function(event, ui) {
 826                 var t = $(ui.helper), o = $(this).data("draggable").options;
 827                 if(t.css("zIndex")) o._zIndex = t.css("zIndex");
 828                 t.css('zIndex', o.zIndex);
 829         },
 830         stop: function(event, ui) {
 831                 var o = $(this).data("draggable").options;
 832                 if(o._zIndex) $(ui.helper).css('zIndex', o._zIndex);
 833         }
 834 });
 835
 836 })(jQuery);