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/wp-includes/js/jquery/ui/ -> draggable.js (source)

   1  /*!
   2   * jQuery UI Draggable 1.13.0-rc.2
   3   * http://jqueryui.com
   4   *
   5   * Copyright jQuery Foundation and other contributors
   6   * Released under the MIT license.
   7   * http://jquery.org/license
   8   */
   9  
  10  //>>label: Draggable
  11  //>>group: Interactions
  12  //>>description: Enables dragging functionality for any element.
  13  //>>docs: http://api.jqueryui.com/draggable/
  14  //>>demos: http://jqueryui.com/draggable/
  15  //>>css.structure: ../../themes/base/draggable.css
  16  
  17  ( function( factory ) {
  18      "use strict";
  19  
  20      if ( typeof define === "function" && define.amd ) {
  21  
  22          // AMD. Register as an anonymous module.
  23          define( [
  24              "jquery",
  25              "./mouse",
  26              "./core"
  27          ], factory );
  28      } else {
  29  
  30          // Browser globals
  31          factory( jQuery );
  32      }
  33  } )( function( $ ) {
  34  "use strict";
  35  
  36  $.widget( "ui.draggable", $.ui.mouse, {
  37      version: "1.13.0-rc.2",
  38      widgetEventPrefix: "drag",
  39      options: {
  40          addClasses: true,
  41          appendTo: "parent",
  42          axis: false,
  43          connectToSortable: false,
  44          containment: false,
  45          cursor: "auto",
  46          cursorAt: false,
  47          grid: false,
  48          handle: false,
  49          helper: "original",
  50          iframeFix: false,
  51          opacity: false,
  52          refreshPositions: false,
  53          revert: false,
  54          revertDuration: 500,
  55          scope: "default",
  56          scroll: true,
  57          scrollSensitivity: 20,
  58          scrollSpeed: 20,
  59          snap: false,
  60          snapMode: "both",
  61          snapTolerance: 20,
  62          stack: false,
  63          zIndex: false,
  64  
  65          // Callbacks
  66          drag: null,
  67          start: null,
  68          stop: null
  69      },
  70      _create: function() {
  71  
  72          if ( this.options.helper === "original" ) {
  73              this._setPositionRelative();
  74          }
  75          if ( this.options.addClasses ) {
  76              this._addClass( "ui-draggable" );
  77          }
  78          this._setHandleClassName();
  79  
  80          this._mouseInit();
  81      },
  82  
  83      _setOption: function( key, value ) {
  84          this._super( key, value );
  85          if ( key === "handle" ) {
  86              this._removeHandleClassName();
  87              this._setHandleClassName();
  88          }
  89      },
  90  
  91      _destroy: function() {
  92          if ( ( this.helper || this.element ).is( ".ui-draggable-dragging" ) ) {
  93              this.destroyOnClear = true;
  94              return;
  95          }
  96          this._removeHandleClassName();
  97          this._mouseDestroy();
  98      },
  99  
 100      _mouseCapture: function( event ) {
 101          var o = this.options;
 102  
 103          // Among others, prevent a drag on a resizable-handle
 104          if ( this.helper || o.disabled ||
 105                  $( event.target ).closest( ".ui-resizable-handle" ).length > 0 ) {
 106              return false;
 107          }
 108  
 109          //Quit if we're not on a valid handle
 110          this.handle = this._getHandle( event );
 111          if ( !this.handle ) {
 112              return false;
 113          }
 114  
 115          this._blurActiveElement( event );
 116  
 117          this._blockFrames( o.iframeFix === true ? "iframe" : o.iframeFix );
 118  
 119          return true;
 120  
 121      },
 122  
 123      _blockFrames: function( selector ) {
 124          this.iframeBlocks = this.document.find( selector ).map( function() {
 125              var iframe = $( this );
 126  
 127              return $( "<div>" )
 128                  .css( "position", "absolute" )
 129                  .appendTo( iframe.parent() )
 130                  .outerWidth( iframe.outerWidth() )
 131                  .outerHeight( iframe.outerHeight() )
 132                  .offset( iframe.offset() )[ 0 ];
 133          } );
 134      },
 135  
 136      _unblockFrames: function() {
 137          if ( this.iframeBlocks ) {
 138              this.iframeBlocks.remove();
 139              delete this.iframeBlocks;
 140          }
 141      },
 142  
 143      _blurActiveElement: function( event ) {
 144          var activeElement = $.ui.safeActiveElement( this.document[ 0 ] ),
 145              target = $( event.target );
 146  
 147          // Don't blur if the event occurred on an element that is within
 148          // the currently focused element
 149          // See #10527, #12472
 150          if ( target.closest( activeElement ).length ) {
 151              return;
 152          }
 153  
 154          // Blur any element that currently has focus, see #4261
 155          $.ui.safeBlur( activeElement );
 156      },
 157  
 158      _mouseStart: function( event ) {
 159  
 160          var o = this.options;
 161  
 162          //Create and append the visible helper
 163          this.helper = this._createHelper( event );
 164  
 165          this._addClass( this.helper, "ui-draggable-dragging" );
 166  
 167          //Cache the helper size
 168          this._cacheHelperProportions();
 169  
 170          //If ddmanager is used for droppables, set the global draggable
 171          if ( $.ui.ddmanager ) {
 172              $.ui.ddmanager.current = this;
 173          }
 174  
 175          /*
 176           * - Position generation -
 177           * This block generates everything position related - it's the core of draggables.
 178           */
 179  
 180          //Cache the margins of the original element
 181          this._cacheMargins();
 182  
 183          //Store the helper's css position
 184          this.cssPosition = this.helper.css( "position" );
 185          this.scrollParent = this.helper.scrollParent( true );
 186          this.offsetParent = this.helper.offsetParent();
 187          this.hasFixedAncestor = this.helper.parents().filter( function() {
 188                  return $( this ).css( "position" ) === "fixed";
 189              } ).length > 0;
 190  
 191          //The element's absolute position on the page minus margins
 192          this.positionAbs = this.element.offset();
 193          this._refreshOffsets( event );
 194  
 195          //Generate the original position
 196          this.originalPosition = this.position = this._generatePosition( event, false );
 197          this.originalPageX = event.pageX;
 198          this.originalPageY = event.pageY;
 199  
 200          //Adjust the mouse offset relative to the helper if "cursorAt" is supplied
 201          if ( o.cursorAt ) {
 202              this._adjustOffsetFromHelper( o.cursorAt );
 203          }
 204  
 205          //Set a containment if given in the options
 206          this._setContainment();
 207  
 208          //Trigger event + callbacks
 209          if ( this._trigger( "start", event ) === false ) {
 210              this._clear();
 211              return false;
 212          }
 213  
 214          //Recache the helper size
 215          this._cacheHelperProportions();
 216  
 217          //Prepare the droppable offsets
 218          if ( $.ui.ddmanager && !o.dropBehaviour ) {
 219              $.ui.ddmanager.prepareOffsets( this, event );
 220          }
 221  
 222          // Execute the drag once - this causes the helper not to be visible before getting its
 223          // correct position
 224          this._mouseDrag( event, true );
 225  
 226          // If the ddmanager is used for droppables, inform the manager that dragging has started
 227          // (see #5003)
 228          if ( $.ui.ddmanager ) {
 229              $.ui.ddmanager.dragStart( this, event );
 230          }
 231  
 232          return true;
 233      },
 234  
 235      _refreshOffsets: function( event ) {
 236          this.offset = {
 237              top: this.positionAbs.top - this.margins.top,
 238              left: this.positionAbs.left - this.margins.left,
 239              scroll: false,
 240              parent: this._getParentOffset(),
 241              relative: this._getRelativeOffset()
 242          };
 243  
 244          this.offset.click = {
 245              left: event.pageX - this.offset.left,
 246              top: event.pageY - this.offset.top
 247          };
 248      },
 249  
 250      _mouseDrag: function( event, noPropagation ) {
 251  
 252          // reset any necessary cached properties (see #5009)
 253          if ( this.hasFixedAncestor ) {
 254              this.offset.parent = this._getParentOffset();
 255          }
 256  
 257          //Compute the helpers position
 258          this.position = this._generatePosition( event, true );
 259          this.positionAbs = this._convertPositionTo( "absolute" );
 260  
 261          //Call plugins and callbacks and use the resulting position if something is returned
 262          if ( !noPropagation ) {
 263              var ui = this._uiHash();
 264              if ( this._trigger( "drag", event, ui ) === false ) {
 265                  this._mouseUp( new $.Event( "mouseup", event ) );
 266                  return false;
 267              }
 268              this.position = ui.position;
 269          }
 270  
 271          this.helper[ 0 ].style.left = this.position.left + "px";
 272          this.helper[ 0 ].style.top = this.position.top + "px";
 273  
 274          if ( $.ui.ddmanager ) {
 275              $.ui.ddmanager.drag( this, event );
 276          }
 277  
 278          return false;
 279      },
 280  
 281      _mouseStop: function( event ) {
 282  
 283          //If we are using droppables, inform the manager about the drop
 284          var that = this,
 285              dropped = false;
 286          if ( $.ui.ddmanager && !this.options.dropBehaviour ) {
 287              dropped = $.ui.ddmanager.drop( this, event );
 288          }
 289  
 290          //if a drop comes from outside (a sortable)
 291          if ( this.dropped ) {
 292              dropped = this.dropped;
 293              this.dropped = false;
 294          }
 295  
 296          if ( ( this.options.revert === "invalid" && !dropped ) ||
 297                  ( this.options.revert === "valid" && dropped ) ||
 298                  this.options.revert === true || ( typeof this.options.revert === "function" &&
 299                  this.options.revert.call( this.element, dropped ) )
 300          ) {
 301              $( this.helper ).animate(
 302                  this.originalPosition,
 303                  parseInt( this.options.revertDuration, 10 ),
 304                  function() {
 305                      if ( that._trigger( "stop", event ) !== false ) {
 306                          that._clear();
 307                      }
 308                  }
 309              );
 310          } else {
 311              if ( this._trigger( "stop", event ) !== false ) {
 312                  this._clear();
 313              }
 314          }
 315  
 316          return false;
 317      },
 318  
 319      _mouseUp: function( event ) {
 320          this._unblockFrames();
 321  
 322          // If the ddmanager is used for droppables, inform the manager that dragging has stopped
 323          // (see #5003)
 324          if ( $.ui.ddmanager ) {
 325              $.ui.ddmanager.dragStop( this, event );
 326          }
 327  
 328          // Only need to focus if the event occurred on the draggable itself, see #10527
 329          if ( this.handleElement.is( event.target ) ) {
 330  
 331              // The interaction is over; whether or not the click resulted in a drag,
 332              // focus the element
 333              this.element.trigger( "focus" );
 334          }
 335  
 336          return $.ui.mouse.prototype._mouseUp.call( this, event );
 337      },
 338  
 339      cancel: function() {
 340  
 341          if ( this.helper.is( ".ui-draggable-dragging" ) ) {
 342              this._mouseUp( new $.Event( "mouseup", { target: this.element[ 0 ] } ) );
 343          } else {
 344              this._clear();
 345          }
 346  
 347          return this;
 348  
 349      },
 350  
 351      _getHandle: function( event ) {
 352          return this.options.handle ?
 353              !!$( event.target ).closest( this.element.find( this.options.handle ) ).length :
 354              true;
 355      },
 356  
 357      _setHandleClassName: function() {
 358          this.handleElement = this.options.handle ?
 359              this.element.find( this.options.handle ) : this.element;
 360          this._addClass( this.handleElement, "ui-draggable-handle" );
 361      },
 362  
 363      _removeHandleClassName: function() {
 364          this._removeClass( this.handleElement, "ui-draggable-handle" );
 365      },
 366  
 367      _createHelper: function( event ) {
 368  
 369          var o = this.options,
 370              helperIsFunction = typeof o.helper === "function",
 371              helper = helperIsFunction ?
 372                  $( o.helper.apply( this.element[ 0 ], [ event ] ) ) :
 373                  ( o.helper === "clone" ?
 374                      this.element.clone().removeAttr( "id" ) :
 375                      this.element );
 376  
 377          if ( !helper.parents( "body" ).length ) {
 378              helper.appendTo( ( o.appendTo === "parent" ?
 379                  this.element[ 0 ].parentNode :
 380                  o.appendTo ) );
 381          }
 382  
 383          // Http://bugs.jqueryui.com/ticket/9446
 384          // a helper function can return the original element
 385          // which wouldn't have been set to relative in _create
 386          if ( helperIsFunction && helper[ 0 ] === this.element[ 0 ] ) {
 387              this._setPositionRelative();
 388          }
 389  
 390          if ( helper[ 0 ] !== this.element[ 0 ] &&
 391                  !( /(fixed|absolute)/ ).test( helper.css( "position" ) ) ) {
 392              helper.css( "position", "absolute" );
 393          }
 394  
 395          return helper;
 396  
 397      },
 398  
 399      _setPositionRelative: function() {
 400          if ( !( /^(?:r|a|f)/ ).test( this.element.css( "position" ) ) ) {
 401              this.element[ 0 ].style.position = "relative";
 402          }
 403      },
 404  
 405      _adjustOffsetFromHelper: function( obj ) {
 406          if ( typeof obj === "string" ) {
 407              obj = obj.split( " " );
 408          }
 409          if ( Array.isArray( obj ) ) {
 410              obj = { left: +obj[ 0 ], top: +obj[ 1 ] || 0 };
 411          }
 412          if ( "left" in obj ) {
 413              this.offset.click.left = obj.left + this.margins.left;
 414          }
 415          if ( "right" in obj ) {
 416              this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
 417          }
 418          if ( "top" in obj ) {
 419              this.offset.click.top = obj.top + this.margins.top;
 420          }
 421          if ( "bottom" in obj ) {
 422              this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
 423          }
 424      },
 425  
 426      _isRootNode: function( element ) {
 427          return ( /(html|body)/i ).test( element.tagName ) || element === this.document[ 0 ];
 428      },
 429  
 430      _getParentOffset: function() {
 431  
 432          //Get the offsetParent and cache its position
 433          var po = this.offsetParent.offset(),
 434              document = this.document[ 0 ];
 435  
 436          // This is a special case where we need to modify a offset calculated on start, since the
 437          // following happened:
 438          // 1. The position of the helper is absolute, so it's position is calculated based on the
 439          // next positioned parent
 440          // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't
 441          // the document, which means that the scroll is included in the initial calculation of the
 442          // offset of the parent, and never recalculated upon drag
 443          if ( this.cssPosition === "absolute" && this.scrollParent[ 0 ] !== document &&
 444                  $.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) {
 445              po.left += this.scrollParent.scrollLeft();
 446              po.top += this.scrollParent.scrollTop();
 447          }
 448  
 449          if ( this._isRootNode( this.offsetParent[ 0 ] ) ) {
 450              po = { top: 0, left: 0 };
 451          }
 452  
 453          return {
 454              top: po.top + ( parseInt( this.offsetParent.css( "borderTopWidth" ), 10 ) || 0 ),
 455              left: po.left + ( parseInt( this.offsetParent.css( "borderLeftWidth" ), 10 ) || 0 )
 456          };
 457  
 458      },
 459  
 460      _getRelativeOffset: function() {
 461          if ( this.cssPosition !== "relative" ) {
 462              return { top: 0, left: 0 };
 463          }
 464  
 465          var p = this.element.position(),
 466              scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );
 467  
 468          return {
 469              top: p.top - ( parseInt( this.helper.css( "top" ), 10 ) || 0 ) +
 470                  ( !scrollIsRootNode ? this.scrollParent.scrollTop() : 0 ),
 471              left: p.left - ( parseInt( this.helper.css( "left" ), 10 ) || 0 ) +
 472                  ( !scrollIsRootNode ? this.scrollParent.scrollLeft() : 0 )
 473          };
 474  
 475      },
 476  
 477      _cacheMargins: function() {
 478          this.margins = {
 479              left: ( parseInt( this.element.css( "marginLeft" ), 10 ) || 0 ),
 480              top: ( parseInt( this.element.css( "marginTop" ), 10 ) || 0 ),
 481              right: ( parseInt( this.element.css( "marginRight" ), 10 ) || 0 ),
 482              bottom: ( parseInt( this.element.css( "marginBottom" ), 10 ) || 0 )
 483          };
 484      },
 485  
 486      _cacheHelperProportions: function() {
 487          this.helperProportions = {
 488              width: this.helper.outerWidth(),
 489              height: this.helper.outerHeight()
 490          };
 491      },
 492  
 493      _setContainment: function() {
 494  
 495          var isUserScrollable, c, ce,
 496              o = this.options,
 497              document = this.document[ 0 ];
 498  
 499          this.relativeContainer = null;
 500  
 501          if ( !o.containment ) {
 502              this.containment = null;
 503              return;
 504          }
 505  
 506          if ( o.containment === "window" ) {
 507              this.containment = [
 508                  $( window ).scrollLeft() - this.offset.relative.left - this.offset.parent.left,
 509                  $( window ).scrollTop() - this.offset.relative.top - this.offset.parent.top,
 510                  $( window ).scrollLeft() + $( window ).width() -
 511                      this.helperProportions.width - this.margins.left,
 512                  $( window ).scrollTop() +
 513                      ( $( window ).height() || document.body.parentNode.scrollHeight ) -
 514                      this.helperProportions.height - this.margins.top
 515              ];
 516              return;
 517          }
 518  
 519          if ( o.containment === "document" ) {
 520              this.containment = [
 521                  0,
 522                  0,
 523                  $( document ).width() - this.helperProportions.width - this.margins.left,
 524                  ( $( document ).height() || document.body.parentNode.scrollHeight ) -
 525                      this.helperProportions.height - this.margins.top
 526              ];
 527              return;
 528          }
 529  
 530          if ( o.containment.constructor === Array ) {
 531              this.containment = o.containment;
 532              return;
 533          }
 534  
 535          if ( o.containment === "parent" ) {
 536              o.containment = this.helper[ 0 ].parentNode;
 537          }
 538  
 539          c = $( o.containment );
 540          ce = c[ 0 ];
 541  
 542          if ( !ce ) {
 543              return;
 544          }
 545  
 546          isUserScrollable = /(scroll|auto)/.test( c.css( "overflow" ) );
 547  
 548          this.containment = [
 549              ( parseInt( c.css( "borderLeftWidth" ), 10 ) || 0 ) +
 550                  ( parseInt( c.css( "paddingLeft" ), 10 ) || 0 ),
 551              ( parseInt( c.css( "borderTopWidth" ), 10 ) || 0 ) +
 552                  ( parseInt( c.css( "paddingTop" ), 10 ) || 0 ),
 553              ( isUserScrollable ? Math.max( ce.scrollWidth, ce.offsetWidth ) : ce.offsetWidth ) -
 554                  ( parseInt( c.css( "borderRightWidth" ), 10 ) || 0 ) -
 555                  ( parseInt( c.css( "paddingRight" ), 10 ) || 0 ) -
 556                  this.helperProportions.width -
 557                  this.margins.left -
 558                  this.margins.right,
 559              ( isUserScrollable ? Math.max( ce.scrollHeight, ce.offsetHeight ) : ce.offsetHeight ) -
 560                  ( parseInt( c.css( "borderBottomWidth" ), 10 ) || 0 ) -
 561                  ( parseInt( c.css( "paddingBottom" ), 10 ) || 0 ) -
 562                  this.helperProportions.height -
 563                  this.margins.top -
 564                  this.margins.bottom
 565          ];
 566          this.relativeContainer = c;
 567      },
 568  
 569      _convertPositionTo: function( d, pos ) {
 570  
 571          if ( !pos ) {
 572              pos = this.position;
 573          }
 574  
 575          var mod = d === "absolute" ? 1 : -1,
 576              scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );
 577  
 578          return {
 579              top: (
 580  
 581                  // The absolute mouse position
 582                  pos.top    +
 583  
 584                  // Only for relative positioned nodes: Relative offset from element to offset parent
 585                  this.offset.relative.top * mod +
 586  
 587                  // The offsetParent's offset without borders (offset + border)
 588                  this.offset.parent.top * mod -
 589                  ( ( this.cssPosition === "fixed" ?
 590                      -this.offset.scroll.top :
 591                      ( scrollIsRootNode ? 0 : this.offset.scroll.top ) ) * mod )
 592              ),
 593              left: (
 594  
 595                  // The absolute mouse position
 596                  pos.left +
 597  
 598                  // Only for relative positioned nodes: Relative offset from element to offset parent
 599                  this.offset.relative.left * mod +
 600  
 601                  // The offsetParent's offset without borders (offset + border)
 602                  this.offset.parent.left * mod    -
 603                  ( ( this.cssPosition === "fixed" ?
 604                      -this.offset.scroll.left :
 605                      ( scrollIsRootNode ? 0 : this.offset.scroll.left ) ) * mod )
 606              )
 607          };
 608  
 609      },
 610  
 611      _generatePosition: function( event, constrainPosition ) {
 612  
 613          var containment, co, top, left,
 614              o = this.options,
 615              scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] ),
 616              pageX = event.pageX,
 617              pageY = event.pageY;
 618  
 619          // Cache the scroll
 620          if ( !scrollIsRootNode || !this.offset.scroll ) {
 621              this.offset.scroll = {
 622                  top: this.scrollParent.scrollTop(),
 623                  left: this.scrollParent.scrollLeft()
 624              };
 625          }
 626  
 627          /*
 628           * - Position constraining -
 629           * Constrain the position to a mix of grid, containment.
 630           */
 631  
 632          // If we are not dragging yet, we won't check for options
 633          if ( constrainPosition ) {
 634              if ( this.containment ) {
 635                  if ( this.relativeContainer ) {
 636                      co = this.relativeContainer.offset();
 637                      containment = [
 638                          this.containment[ 0 ] + co.left,
 639                          this.containment[ 1 ] + co.top,
 640                          this.containment[ 2 ] + co.left,
 641                          this.containment[ 3 ] + co.top
 642                      ];
 643                  } else {
 644                      containment = this.containment;
 645                  }
 646  
 647                  if ( event.pageX - this.offset.click.left < containment[ 0 ] ) {
 648                      pageX = containment[ 0 ] + this.offset.click.left;
 649                  }
 650                  if ( event.pageY - this.offset.click.top < containment[ 1 ] ) {
 651                      pageY = containment[ 1 ] + this.offset.click.top;
 652                  }
 653                  if ( event.pageX - this.offset.click.left > containment[ 2 ] ) {
 654                      pageX = containment[ 2 ] + this.offset.click.left;
 655                  }
 656                  if ( event.pageY - this.offset.click.top > containment[ 3 ] ) {
 657                      pageY = containment[ 3 ] + this.offset.click.top;
 658                  }
 659              }
 660  
 661              if ( o.grid ) {
 662  
 663                  //Check for grid elements set to 0 to prevent divide by 0 error causing invalid
 664                  // argument errors in IE (see ticket #6950)
 665                  top = o.grid[ 1 ] ? this.originalPageY + Math.round( ( pageY -
 666                      this.originalPageY ) / o.grid[ 1 ] ) * o.grid[ 1 ] : this.originalPageY;
 667                  pageY = containment ? ( ( top - this.offset.click.top >= containment[ 1 ] ||
 668                      top - this.offset.click.top > containment[ 3 ] ) ?
 669                          top :
 670                          ( ( top - this.offset.click.top >= containment[ 1 ] ) ?
 671                              top - o.grid[ 1 ] : top + o.grid[ 1 ] ) ) : top;
 672  
 673                  left = o.grid[ 0 ] ? this.originalPageX +
 674                      Math.round( ( pageX - this.originalPageX ) / o.grid[ 0 ] ) * o.grid[ 0 ] :
 675                      this.originalPageX;
 676                  pageX = containment ? ( ( left - this.offset.click.left >= containment[ 0 ] ||
 677                      left - this.offset.click.left > containment[ 2 ] ) ?
 678                          left :
 679                          ( ( left - this.offset.click.left >= containment[ 0 ] ) ?
 680                              left - o.grid[ 0 ] : left + o.grid[ 0 ] ) ) : left;
 681              }
 682  
 683              if ( o.axis === "y" ) {
 684                  pageX = this.originalPageX;
 685              }
 686  
 687              if ( o.axis === "x" ) {
 688                  pageY = this.originalPageY;
 689              }
 690          }
 691  
 692          return {
 693              top: (
 694  
 695                  // The absolute mouse position
 696                  pageY -
 697  
 698                  // Click offset (relative to the element)
 699                  this.offset.click.top -
 700  
 701                  // Only for relative positioned nodes: Relative offset from element to offset parent
 702                  this.offset.relative.top -
 703  
 704                  // The offsetParent's offset without borders (offset + border)
 705                  this.offset.parent.top +
 706                  ( this.cssPosition === "fixed" ?
 707                      -this.offset.scroll.top :
 708                      ( scrollIsRootNode ? 0 : this.offset.scroll.top ) )
 709              ),
 710              left: (
 711  
 712                  // The absolute mouse position
 713                  pageX -
 714  
 715                  // Click offset (relative to the element)
 716                  this.offset.click.left -
 717  
 718                  // Only for relative positioned nodes: Relative offset from element to offset parent
 719                  this.offset.relative.left -
 720  
 721                  // The offsetParent's offset without borders (offset + border)
 722                  this.offset.parent.left +
 723                  ( this.cssPosition === "fixed" ?
 724                      -this.offset.scroll.left :
 725                      ( scrollIsRootNode ? 0 : this.offset.scroll.left ) )
 726              )
 727          };
 728  
 729      },
 730  
 731      _clear: function() {
 732          this._removeClass( this.helper, "ui-draggable-dragging" );
 733          if ( this.helper[ 0 ] !== this.element[ 0 ] && !this.cancelHelperRemoval ) {
 734              this.helper.remove();
 735          }
 736          this.helper = null;
 737          this.cancelHelperRemoval = false;
 738          if ( this.destroyOnClear ) {
 739              this.destroy();
 740          }
 741      },
 742  
 743      // From now on bulk stuff - mainly helpers
 744  
 745      _trigger: function( type, event, ui ) {
 746          ui = ui || this._uiHash();
 747          $.ui.plugin.call( this, type, [ event, ui, this ], true );
 748  
 749          // Absolute position and offset (see #6884 ) have to be recalculated after plugins
 750          if ( /^(drag|start|stop)/.test( type ) ) {
 751              this.positionAbs = this._convertPositionTo( "absolute" );
 752              ui.offset = this.positionAbs;
 753          }
 754          return $.Widget.prototype._trigger.call( this, type, event, ui );
 755      },
 756  
 757      plugins: {},
 758  
 759      _uiHash: function() {
 760          return {
 761              helper: this.helper,
 762              position: this.position,
 763              originalPosition: this.originalPosition,
 764              offset: this.positionAbs
 765          };
 766      }
 767  
 768  } );
 769  
 770  $.ui.plugin.add( "draggable", "connectToSortable", {
 771      start: function( event, ui, draggable ) {
 772          var uiSortable = $.extend( {}, ui, {
 773              item: draggable.element
 774          } );
 775  
 776          draggable.sortables = [];
 777          $( draggable.options.connectToSortable ).each( function() {
 778              var sortable = $( this ).sortable( "instance" );
 779  
 780              if ( sortable && !sortable.options.disabled ) {
 781                  draggable.sortables.push( sortable );
 782  
 783                  // RefreshPositions is called at drag start to refresh the containerCache
 784                  // which is used in drag. This ensures it's initialized and synchronized
 785                  // with any changes that might have happened on the page since initialization.
 786                  sortable.refreshPositions();
 787                  sortable._trigger( "activate", event, uiSortable );
 788              }
 789          } );
 790      },
 791      stop: function( event, ui, draggable ) {
 792          var uiSortable = $.extend( {}, ui, {
 793              item: draggable.element
 794          } );
 795  
 796          draggable.cancelHelperRemoval = false;
 797  
 798          $.each( draggable.sortables, function() {
 799              var sortable = this;
 800  
 801              if ( sortable.isOver ) {
 802                  sortable.isOver = 0;
 803  
 804                  // Allow this sortable to handle removing the helper
 805                  draggable.cancelHelperRemoval = true;
 806                  sortable.cancelHelperRemoval = false;
 807  
 808                  // Use _storedCSS To restore properties in the sortable,
 809                  // as this also handles revert (#9675) since the draggable
 810                  // may have modified them in unexpected ways (#8809)
 811                  sortable._storedCSS = {
 812                      position: sortable.placeholder.css( "position" ),
 813                      top: sortable.placeholder.css( "top" ),
 814                      left: sortable.placeholder.css( "left" )
 815                  };
 816  
 817                  sortable._mouseStop( event );
 818  
 819                  // Once drag has ended, the sortable should return to using
 820                  // its original helper, not the shared helper from draggable
 821                  sortable.options.helper = sortable.options._helper;
 822              } else {
 823  
 824                  // Prevent this Sortable from removing the helper.
 825                  // However, don't set the draggable to remove the helper
 826                  // either as another connected Sortable may yet handle the removal.
 827                  sortable.cancelHelperRemoval = true;
 828  
 829                  sortable._trigger( "deactivate", event, uiSortable );
 830              }
 831          } );
 832      },
 833      drag: function( event, ui, draggable ) {
 834          $.each( draggable.sortables, function() {
 835              var innermostIntersecting = false,
 836                  sortable = this;
 837  
 838              // Copy over variables that sortable's _intersectsWith uses
 839              sortable.positionAbs = draggable.positionAbs;
 840              sortable.helperProportions = draggable.helperProportions;
 841              sortable.offset.click = draggable.offset.click;
 842  
 843              if ( sortable._intersectsWith( sortable.containerCache ) ) {
 844                  innermostIntersecting = true;
 845  
 846                  $.each( draggable.sortables, function() {
 847  
 848                      // Copy over variables that sortable's _intersectsWith uses
 849                      this.positionAbs = draggable.positionAbs;
 850                      this.helperProportions = draggable.helperProportions;
 851                      this.offset.click = draggable.offset.click;
 852  
 853                      if ( this !== sortable &&
 854                              this._intersectsWith( this.containerCache ) &&
 855                              $.contains( sortable.element[ 0 ], this.element[ 0 ] ) ) {
 856                          innermostIntersecting = false;
 857                      }
 858  
 859                      return innermostIntersecting;
 860                  } );
 861              }
 862  
 863              if ( innermostIntersecting ) {
 864  
 865                  // If it intersects, we use a little isOver variable and set it once,
 866                  // so that the move-in stuff gets fired only once.
 867                  if ( !sortable.isOver ) {
 868                      sortable.isOver = 1;
 869  
 870                      // Store draggable's parent in case we need to reappend to it later.
 871                      draggable._parent = ui.helper.parent();
 872  
 873                      sortable.currentItem = ui.helper
 874                          .appendTo( sortable.element )
 875                          .data( "ui-sortable-item", true );
 876  
 877                      // Store helper option to later restore it
 878                      sortable.options._helper = sortable.options.helper;
 879  
 880                      sortable.options.helper = function() {
 881                          return ui.helper[ 0 ];
 882                      };
 883  
 884                      // Fire the start events of the sortable with our passed browser event,
 885                      // and our own helper (so it doesn't create a new one)
 886                      event.target = sortable.currentItem[ 0 ];
 887                      sortable._mouseCapture( event, true );
 888                      sortable._mouseStart( event, true, true );
 889  
 890                      // Because the browser event is way off the new appended portlet,
 891                      // modify necessary variables to reflect the changes
 892                      sortable.offset.click.top = draggable.offset.click.top;
 893                      sortable.offset.click.left = draggable.offset.click.left;
 894                      sortable.offset.parent.left -= draggable.offset.parent.left -
 895                          sortable.offset.parent.left;
 896                      sortable.offset.parent.top -= draggable.offset.parent.top -
 897                          sortable.offset.parent.top;
 898  
 899                      draggable._trigger( "toSortable", event );
 900  
 901                      // Inform draggable that the helper is in a valid drop zone,
 902                      // used solely in the revert option to handle "valid/invalid".
 903                      draggable.dropped = sortable.element;
 904  
 905                      // Need to refreshPositions of all sortables in the case that
 906                      // adding to one sortable changes the location of the other sortables (#9675)
 907                      $.each( draggable.sortables, function() {
 908                          this.refreshPositions();
 909                      } );
 910  
 911                      // Hack so receive/update callbacks work (mostly)
 912                      draggable.currentItem = draggable.element;
 913                      sortable.fromOutside = draggable;
 914                  }
 915  
 916                  if ( sortable.currentItem ) {
 917                      sortable._mouseDrag( event );
 918  
 919                      // Copy the sortable's position because the draggable's can potentially reflect
 920                      // a relative position, while sortable is always absolute, which the dragged
 921                      // element has now become. (#8809)
 922                      ui.position = sortable.position;
 923                  }
 924              } else {
 925  
 926                  // If it doesn't intersect with the sortable, and it intersected before,
 927                  // we fake the drag stop of the sortable, but make sure it doesn't remove
 928                  // the helper by using cancelHelperRemoval.
 929                  if ( sortable.isOver ) {
 930  
 931                      sortable.isOver = 0;
 932                      sortable.cancelHelperRemoval = true;
 933  
 934                      // Calling sortable's mouseStop would trigger a revert,
 935                      // so revert must be temporarily false until after mouseStop is called.
 936                      sortable.options._revert = sortable.options.revert;
 937                      sortable.options.revert = false;
 938  
 939                      sortable._trigger( "out", event, sortable._uiHash( sortable ) );
 940                      sortable._mouseStop( event, true );
 941  
 942                      // Restore sortable behaviors that were modfied
 943                      // when the draggable entered the sortable area (#9481)
 944                      sortable.options.revert = sortable.options._revert;
 945                      sortable.options.helper = sortable.options._helper;
 946  
 947                      if ( sortable.placeholder ) {
 948                          sortable.placeholder.remove();
 949                      }
 950  
 951                      // Restore and recalculate the draggable's offset considering the sortable
 952                      // may have modified them in unexpected ways. (#8809, #10669)
 953                      ui.helper.appendTo( draggable._parent );
 954                      draggable._refreshOffsets( event );
 955                      ui.position = draggable._generatePosition( event, true );
 956  
 957                      draggable._trigger( "fromSortable", event );
 958  
 959                      // Inform draggable that the helper is no longer in a valid drop zone
 960                      draggable.dropped = false;
 961  
 962                      // Need to refreshPositions of all sortables just in case removing
 963                      // from one sortable changes the location of other sortables (#9675)
 964                      $.each( draggable.sortables, function() {
 965                          this.refreshPositions();
 966                      } );
 967                  }
 968              }
 969          } );
 970      }
 971  } );
 972  
 973  $.ui.plugin.add( "draggable", "cursor", {
 974      start: function( event, ui, instance ) {
 975          var t = $( "body" ),
 976              o = instance.options;
 977  
 978          if ( t.css( "cursor" ) ) {
 979              o._cursor = t.css( "cursor" );
 980          }
 981          t.css( "cursor", o.cursor );
 982      },
 983      stop: function( event, ui, instance ) {
 984          var o = instance.options;
 985          if ( o._cursor ) {
 986              $( "body" ).css( "cursor", o._cursor );
 987          }
 988      }
 989  } );
 990  
 991  $.ui.plugin.add( "draggable", "opacity", {
 992      start: function( event, ui, instance ) {
 993          var t = $( ui.helper ),
 994              o = instance.options;
 995          if ( t.css( "opacity" ) ) {
 996              o._opacity = t.css( "opacity" );
 997          }
 998          t.css( "opacity", o.opacity );
 999      },
1000      stop: function( event, ui, instance ) {
1001          var o = instance.options;
1002          if ( o._opacity ) {
1003              $( ui.helper ).css( "opacity", o._opacity );
1004          }
1005      }
1006  } );
1007  
1008  $.ui.plugin.add( "draggable", "scroll", {
1009      start: function( event, ui, i ) {
1010          if ( !i.scrollParentNotHidden ) {
1011              i.scrollParentNotHidden = i.helper.scrollParent( false );
1012          }
1013  
1014          if ( i.scrollParentNotHidden[ 0 ] !== i.document[ 0 ] &&
1015                  i.scrollParentNotHidden[ 0 ].tagName !== "HTML" ) {
1016              i.overflowOffset = i.scrollParentNotHidden.offset();
1017          }
1018      },
1019      drag: function( event, ui, i  ) {
1020  
1021          var o = i.options,
1022              scrolled = false,
1023              scrollParent = i.scrollParentNotHidden[ 0 ],
1024              document = i.document[ 0 ];
1025  
1026          if ( scrollParent !== document && scrollParent.tagName !== "HTML" ) {
1027              if ( !o.axis || o.axis !== "x" ) {
1028                  if ( ( i.overflowOffset.top + scrollParent.offsetHeight ) - event.pageY <
1029                          o.scrollSensitivity ) {
1030                      scrollParent.scrollTop = scrolled = scrollParent.scrollTop + o.scrollSpeed;
1031                  } else if ( event.pageY - i.overflowOffset.top < o.scrollSensitivity ) {
1032                      scrollParent.scrollTop = scrolled = scrollParent.scrollTop - o.scrollSpeed;
1033                  }
1034              }
1035  
1036              if ( !o.axis || o.axis !== "y" ) {
1037                  if ( ( i.overflowOffset.left + scrollParent.offsetWidth ) - event.pageX <
1038                          o.scrollSensitivity ) {
1039                      scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft + o.scrollSpeed;
1040                  } else if ( event.pageX - i.overflowOffset.left < o.scrollSensitivity ) {
1041                      scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft - o.scrollSpeed;
1042                  }
1043              }
1044  
1045          } else {
1046  
1047              if ( !o.axis || o.axis !== "x" ) {
1048                  if ( event.pageY - $( document ).scrollTop() < o.scrollSensitivity ) {
1049                      scrolled = $( document ).scrollTop( $( document ).scrollTop() - o.scrollSpeed );
1050                  } else if ( $( window ).height() - ( event.pageY - $( document ).scrollTop() ) <
1051                          o.scrollSensitivity ) {
1052                      scrolled = $( document ).scrollTop( $( document ).scrollTop() + o.scrollSpeed );
1053                  }
1054              }
1055  
1056              if ( !o.axis || o.axis !== "y" ) {
1057                  if ( event.pageX - $( document ).scrollLeft() < o.scrollSensitivity ) {
1058                      scrolled = $( document ).scrollLeft(
1059                          $( document ).scrollLeft() - o.scrollSpeed
1060                      );
1061                  } else if ( $( window ).width() - ( event.pageX - $( document ).scrollLeft() ) <
1062                          o.scrollSensitivity ) {
1063                      scrolled = $( document ).scrollLeft(
1064                          $( document ).scrollLeft() + o.scrollSpeed
1065                      );
1066                  }
1067              }
1068  
1069          }
1070  
1071          if ( scrolled !== false && $.ui.ddmanager && !o.dropBehaviour ) {
1072              $.ui.ddmanager.prepareOffsets( i, event );
1073          }
1074  
1075      }
1076  } );
1077  
1078  $.ui.plugin.add( "draggable", "snap", {
1079      start: function( event, ui, i ) {
1080  
1081          var o = i.options;
1082  
1083          i.snapElements = [];
1084  
1085          $( o.snap.constructor !== String ? ( o.snap.items || ":data(ui-draggable)" ) : o.snap )
1086              .each( function() {
1087                  var $t = $( this ),
1088                      $o = $t.offset();
1089                  if ( this !== i.element[ 0 ] ) {
1090                      i.snapElements.push( {
1091                          item: this,
1092                          width: $t.outerWidth(), height: $t.outerHeight(),
1093                          top: $o.top, left: $o.left
1094                      } );
1095                  }
1096              } );
1097  
1098      },
1099      drag: function( event, ui, inst ) {
1100  
1101          var ts, bs, ls, rs, l, r, t, b, i, first,
1102              o = inst.options,
1103              d = o.snapTolerance,
1104              x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
1105              y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;
1106  
1107          for ( i = inst.snapElements.length - 1; i >= 0; i-- ) {
1108  
1109              l = inst.snapElements[ i ].left - inst.margins.left;
1110              r = l + inst.snapElements[ i ].width;
1111              t = inst.snapElements[ i ].top - inst.margins.top;
1112              b = t + inst.snapElements[ i ].height;
1113  
1114              if ( x2 < l - d || x1 > r + d || y2 < t - d || y1 > b + d ||
1115                      !$.contains( inst.snapElements[ i ].item.ownerDocument,
1116                      inst.snapElements[ i ].item ) ) {
1117                  if ( inst.snapElements[ i ].snapping ) {
1118                      if ( inst.options.snap.release ) {
1119                          inst.options.snap.release.call(
1120                              inst.element,
1121                              event,
1122                              $.extend( inst._uiHash(), { snapItem: inst.snapElements[ i ].item } )
1123                          );
1124                      }
1125                  }
1126                  inst.snapElements[ i ].snapping = false;
1127                  continue;
1128              }
1129  
1130              if ( o.snapMode !== "inner" ) {
1131                  ts = Math.abs( t - y2 ) <= d;
1132                  bs = Math.abs( b - y1 ) <= d;
1133                  ls = Math.abs( l - x2 ) <= d;
1134                  rs = Math.abs( r - x1 ) <= d;
1135                  if ( ts ) {
1136                      ui.position.top = inst._convertPositionTo( "relative", {
1137                          top: t - inst.helperProportions.height,
1138                          left: 0
1139                      } ).top;
1140                  }
1141                  if ( bs ) {
1142                      ui.position.top = inst._convertPositionTo( "relative", {
1143                          top: b,
1144                          left: 0
1145                      } ).top;
1146                  }
1147                  if ( ls ) {
1148                      ui.position.left = inst._convertPositionTo( "relative", {
1149                          top: 0,
1150                          left: l - inst.helperProportions.width
1151                      } ).left;
1152                  }
1153                  if ( rs ) {
1154                      ui.position.left = inst._convertPositionTo( "relative", {
1155                          top: 0,
1156                          left: r
1157                      } ).left;
1158                  }
1159              }
1160  
1161              first = ( ts || bs || ls || rs );
1162  
1163              if ( o.snapMode !== "outer" ) {
1164                  ts = Math.abs( t - y1 ) <= d;
1165                  bs = Math.abs( b - y2 ) <= d;
1166                  ls = Math.abs( l - x1 ) <= d;
1167                  rs = Math.abs( r - x2 ) <= d;
1168                  if ( ts ) {
1169                      ui.position.top = inst._convertPositionTo( "relative", {
1170                          top: t,
1171                          left: 0
1172                      } ).top;
1173                  }
1174                  if ( bs ) {
1175                      ui.position.top = inst._convertPositionTo( "relative", {
1176                          top: b - inst.helperProportions.height,
1177                          left: 0
1178                      } ).top;
1179                  }
1180                  if ( ls ) {
1181                      ui.position.left = inst._convertPositionTo( "relative", {
1182                          top: 0,
1183                          left: l
1184                      } ).left;
1185                  }
1186                  if ( rs ) {
1187                      ui.position.left = inst._convertPositionTo( "relative", {
1188                          top: 0,
1189                          left: r - inst.helperProportions.width
1190                      } ).left;
1191                  }
1192              }
1193  
1194              if ( !inst.snapElements[ i ].snapping && ( ts || bs || ls || rs || first ) ) {
1195                  if ( inst.options.snap.snap ) {
1196                      inst.options.snap.snap.call(
1197                          inst.element,
1198                          event,
1199                          $.extend( inst._uiHash(), {
1200                              snapItem: inst.snapElements[ i ].item
1201                          } ) );
1202                  }
1203              }
1204              inst.snapElements[ i ].snapping = ( ts || bs || ls || rs || first );
1205  
1206          }
1207  
1208      }
1209  } );
1210  
1211  $.ui.plugin.add( "draggable", "stack", {
1212      start: function( event, ui, instance ) {
1213          var min,
1214              o = instance.options,
1215              group = $.makeArray( $( o.stack ) ).sort( function( a, b ) {
1216                  return ( parseInt( $( a ).css( "zIndex" ), 10 ) || 0 ) -
1217                      ( parseInt( $( b ).css( "zIndex" ), 10 ) || 0 );
1218              } );
1219  
1220          if ( !group.length ) {
1221              return;
1222          }
1223  
1224          min = parseInt( $( group[ 0 ] ).css( "zIndex" ), 10 ) || 0;
1225          $( group ).each( function( i ) {
1226              $( this ).css( "zIndex", min + i );
1227          } );
1228          this.css( "zIndex", ( min + group.length ) );
1229      }
1230  } );
1231  
1232  $.ui.plugin.add( "draggable", "zIndex", {
1233      start: function( event, ui, instance ) {
1234          var t = $( ui.helper ),
1235              o = instance.options;
1236  
1237          if ( t.css( "zIndex" ) ) {
1238              o._zIndex = t.css( "zIndex" );
1239          }
1240          t.css( "zIndex", o.zIndex );
1241      },
1242      stop: function( event, ui, instance ) {
1243          var o = instance.options;
1244  
1245          if ( o._zIndex ) {
1246              $( ui.helper ).css( "zIndex", o._zIndex );
1247          }
1248      }
1249  } );
1250  
1251  return $.ui.draggable;
1252  
1253  } );


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