text: /**
   * TableDnD plug-in for JQuery, allows you to drag and drop table rows
   * You can set up various options to control how the system will work
   * Copyright (c) Denis Howlett <denish@isocra.com>
   * Licensed like jQuery, see http://docs.jquery.com/License.
   *
   * Configuration options:
   *
   * onDragStyle
   *     This is the style that is assigned to the row during drag. There are limitations to the styles that can be
   *     associated with a row (such as you can't assign a border--well you can, but it won't be
   *     displayed). (So instead consider using onDragClass.) The CSS style to apply is specified as
   *     a map (as used in the jQuery css(...) function).
   * onDropStyle
   *     This is the style that is assigned to the row when it is dropped. As for onDragStyle, there are limitations
   *     to what you can do. Also this replaces the original style, so again consider using onDragClass which
   *     is simply added and then removed on drop.
   * onDragClass
   *     This class is added for the duration of the drag and then removed when the row is dropped. It is more
   *     flexible than using onDragStyle since it can be inherited by the row cells and other content. The default
   *     is class is tDnD_whileDrag. So to use the default, simply customise this CSS class in your
   *     stylesheet.
   * onDrop
   *     Pass a function that will be called when the row is dropped. The function takes 2 parameters: the table
   *     and the row that was dropped. You can work out the new order of the rows by using
   *     table.rows.
   * onDragStart
   *     Pass a function that will be called when the user starts dragging. The function takes 2 parameters: the
   *     table and the row which the user has started to drag.
   * onAllowDrop
   *     Pass a function that will be called as a row is over another row. If the function returns true, allow
   *     dropping on that row, otherwise not. The function takes 2 parameters: the dragged row and the row under
   *     the cursor. It returns a boolean: true allows the drop, false doesn't allow it.
   * scrollAmount
   *     This is the number of pixels to scroll if the user moves the mouse cursor to the top or bottom of the
   *     window. The page should automatically scroll up or down as appropriate (tested in IE6, IE7, Safari, FF2,
   *     FF3 beta
   * dragHandle
   *     This is the name of a class that you assign to one or more cells in each row that is draggable. If you
   *     specify this class, then you are responsible for setting cursor: move in the CSS and only these cells
   *     will have the drag behaviour. If you do not specify a dragHandle, then you get the old behaviour where
   *     the whole row is draggable.
   *
   * Other ways to control behaviour:
   *
   * Add class="nodrop" to any rows for which you don't want to allow dropping, and class="nodrag" to any rows
   * that you don't want to be draggable.
   *
   * Inside the onDrop method you can also call $.tableDnD.serialize() this returns a string of the form
   * <tableID>[]=<rowID1>&<tableID>[]=<rowID2> so that you can send this back to the server. The table must have
   * an ID as must all the rows.
   *
   * Other methods:
   *
   * $("...").tableDnDUpdate()
   * Will update all the matching tables, that is it will reapply the mousedown method to the rows (or handle cells).
   * This is useful if you have updated the table rows using Ajax and you want to make the table draggable again.
   * The table maintains the original configuration (so you don't have to specify it again).
   *
   * $("...").tableDnDSerialize()
   * Will serialize and return the serialized string as above, but for each of the matching tables--so it can be
   * called from anywhere and isn't dependent on the currentTable being set up correctly before calling
   *
   * Known problems:
   * - Auto-scoll has some problems with IE7  (it scrolls even when it shouldn't), work-around: set scrollAmount to 0
   *
   * Version 0.2: 2008-02-20 First public version
   * Version 0.3: 2008-02-07 Added onDragStart option
   *                         Made the scroll amount configurable (default is 5 as before)
   * Version 0.4: 2008-03-15 Changed the noDrag/noDrop attributes to nodrag/nodrop classes
   *                         Added onAllowDrop to control dropping
   *                         Fixed a bug which meant that you couldn't set the scroll amount in both directions
   *                         Added serialize method
   * Version 0.5: 2008-05-16 Changed so that if you specify a dragHandle class it doesn't make the whole row
   *                         draggable
   *                         Improved the serialize method to use a default (and settable) regular expression.
   *                         Added tableDnDupate() and tableDnDSerialize() to be called when you are outside the table
   */
  jQuery.tableDnD = {
    /** Keep hold of the current table being dragged */
    currentTable : null,
    /** Keep hold of the current drag object if any */
    dragObject: null,
    /** The current mouse offset */
    mouseOffset: null,
    /** Remember the old value of Y so that we don't do too much processing */
    oldY: 0,
  
    /** Actually build the structure */
    build: function(options) {
      // Set up the defaults if any
  
      this.each(function() {
        // This is bound to each matching table, set up the defaults and override with user options
        this.tableDnDConfig = jQuery.extend({
          onDragStyle: null,
          onDropStyle: null,
          // Add in the default class for whileDragging
          onDragClass: "tDnD_whileDrag",
          onDrop: null,
          onDragStart: null,
          scrollAmount: 5,
          serializeRegexp: /[^\-]*$/, // The regular expression to use to trim row IDs
          serializeParamName: null, // If you want to specify another parameter name instead of the table ID
          dragHandle: null // If you give the name of a class here, then only Cells with this class will be draggable
        }, options || {});
        // Now make the rows draggable
        jQuery.tableDnD.makeDraggable(this);
      });
  
      // Now we need to capture the mouse up and mouse move event
      // We can use bind so that we don't interfere with other event handlers
      jQuery(document)
              .bind('mousemove', jQuery.tableDnD.mousemove)
              .bind('mouseup', jQuery.tableDnD.mouseup);
  
      // Don't break the chain
      return this;
    },
  
    /** This function makes all the rows on the table draggable apart from those marked as "NoDrag" */
    makeDraggable: function(table) {
      var config = table.tableDnDConfig;
      if (table.tableDnDConfig.dragHandle) {
        // We only need to add the event to the specified cells
        var cells = jQuery("td." + table.tableDnDConfig.dragHandle, table);
        cells.each(function() {
          // The cell is bound to "this"
          jQuery(this).mousedown(function(ev) {
            jQuery.tableDnD.dragObject = this.parentNode;
            jQuery.tableDnD.currentTable = table;
            jQuery.tableDnD.mouseOffset = jQuery.tableDnD.getMouseOffset(this, ev);
            if (config.onDragStart) {
              // Call the onDrop method if there is one
              config.onDragStart(table, this);
            }
            return false;
          });
        })
      } else {
        // For backwards compatibility, we add the event to the whole row
        var rows = jQuery("tr", table); // get all the rows as a wrapped set
        rows.each(function() {
          // Iterate through each row, the row is bound to "this"
          var row = jQuery(this);
          if (! row.hasClass("nodrag")) {
            row.mousedown(
                    function(ev) {
                      if (ev.target.tagName == "TD") {
                        jQuery.tableDnD.dragObject = this;
                        jQuery.tableDnD.currentTable = table;
                        jQuery.tableDnD.mouseOffset = jQuery.tableDnD.getMouseOffset(this, ev);
                        if (config.onDragStart) {
                          // Call the onDrop method if there is one
                          config.onDragStart(table, this);
                        }
                        return false;
                      }
                    }).css("cursor", "move"); // Store the tableDnD object
          }
        });
      }
    },
  
    updateTables: function() {
      this.each(function() {
        // this is now bound to each matching table
        if (this.tableDnDConfig) {
          jQuery.tableDnD.makeDraggable(this);
        }
      })
    },
  
    /** Get the mouse coordinates from the event (allowing for browser differences) */
    mouseCoords: function(ev) {
      if (ev.pageX || ev.pageY) {
        return {x:ev.pageX, y:ev.pageY};
      }
      return {
        x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
        y:ev.clientY + document.body.scrollTop - document.body.clientTop
      };
    },
  
    /** Given a target element and a mouse event, get the mouse offset from that element.
     To do this we need the element's position and the mouse position */
    getMouseOffset: function(target, ev) {
      ev = ev || window.event;
  
      var docPos = this.getPosition(target);
      var mousePos = this.mouseCoords(ev);
      return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
    },
  
    /** Get the position of an element by going up the DOM tree and adding up all the offsets */
    getPosition: function(e) {
      var left = 0;
      var top = 0;
      /** Safari fix -- thanks to Luis Chato for this! */
      if (e.offsetHeight == 0) {
        /** Safari 2 doesn't correctly grab the offsetTop of a table row
         this is detailed here:
         http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari/
         the solution is likewise noted there, grab the offset of a table cell in the row - the firstChild.
         note that firefox will return a text node as a first child, so designing a more thorough
         solution may need to take that into account, for now this seems to work in firefox, safari, ie */
        e = e.firstChild; // a table cell
      }
      if (e && e.offsetParent) {
        while (e.offsetParent) {
          left += e.offsetLeft;
          top += e.offsetTop;
          e = e.offsetParent;
        }
  
        left += e.offsetLeft;
        top += e.offsetTop;
      }
  
      return {x:left, y:top};
    },
  
    mousemove: function(ev) {
      if (jQuery.tableDnD.dragObject == null) {
        return;
      }
  
      var dragObj = jQuery(jQuery.tableDnD.dragObject);
      var config = jQuery.tableDnD.currentTable.tableDnDConfig;
      var mousePos = jQuery.tableDnD.mouseCoords(ev);
      var y = mousePos.y - jQuery.tableDnD.mouseOffset.y;
      //auto scroll the window
      var yOffset = window.pageYOffset;
      if (document.all) {
        // Windows version
        //yOffset=document.body.scrollTop;
        if (typeof document.compatMode != 'undefined' &&
                document.compatMode != 'BackCompat') {
          yOffset = document.documentElement.scrollTop;
        }
        else if (typeof document.body != 'undefined') {
          yOffset = document.body.scrollTop;
        }
  
      }
  
      if (mousePos.y - yOffset < config.scrollAmount) {
        window.scrollBy(0, -config.scrollAmount);
      } else {
        var windowHeight = window.innerHeight ? window.innerHeight
                : document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight;
        if (windowHeight - (mousePos.y - yOffset) < config.scrollAmount) {
          window.scrollBy(0, config.scrollAmount);
        }
      }
  
  
      if (y != jQuery.tableDnD.oldY) {
        // work out if we're going up or down...
        var movingDown = y > jQuery.tableDnD.oldY;
        // update the old value
        jQuery.tableDnD.oldY = y;
        // update the style to show we're dragging
        if (config.onDragClass) {
          dragObj.addClass(config.onDragClass);
        } else {
          dragObj.css(config.onDragStyle);
        }
        // If we're over a row then move the dragged row to there so that the user sees the
        // effect dynamically
        var currentRow = jQuery.tableDnD.findDropTargetRow(dragObj, y);
        if (currentRow) {
          // TODO worry about what happens when there are multiple TBODIES
          if (movingDown && jQuery.tableDnD.dragObject != currentRow) {
            jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject, currentRow.nextSibling);
          } else if (! movingDown && jQuery.tableDnD.dragObject != currentRow) {
            jQuery.tableDnD.dragObject.parentNode.insertBefore(jQuery.tableDnD.dragObject, currentRow);
          }
        }
      }
  
      return false;
    },
  
    /** We're only worried about the y position really, because we can only move rows up and down */
    findDropTargetRow: function(draggedRow, y) {
      var rows = jQuery.tableDnD.currentTable.rows;
      for (var i = 0; i < rows.length; i++) {
        var row = rows[i];
        var rowY = this.getPosition(row).y;
        var rowHeight = parseInt(row.offsetHeight) / 2;
        if (row.offsetHeight == 0) {
          rowY = this.getPosition(row.firstChild).y;
          rowHeight = parseInt(row.firstChild.offsetHeight) / 2;
        }
        // Because we always have to insert before, we need to offset the height a bit
        if ((y > rowY - rowHeight) && (y < (rowY + rowHeight))) {
          // that's the row we're over
          // If it's the same as the current row, ignore it
          if (row == draggedRow) {
            return null;
          }
          var config = jQuery.tableDnD.currentTable.tableDnDConfig;
          if (config.onAllowDrop) {
            if (config.onAllowDrop(draggedRow, row)) {
              return row;
            } else {
              return null;
            }
          } else {
            // If a row has nodrop class, then don't allow dropping (inspired by John Tarr and Famic)
            var nodrop = jQuery(row).hasClass("nodrop");
            if (! nodrop) {
              return row;
            } else {
              return null;
            }
          }
          return row;
        }
      }
      return null;
    },
  
    mouseup: function(e) {
      if (jQuery.tableDnD.currentTable && jQuery.tableDnD.dragObject) {
        var droppedRow = jQuery.tableDnD.dragObject;
        var config = jQuery.tableDnD.currentTable.tableDnDConfig;
        // If we have a dragObject, then we need to release it,
        // The row will already have been moved to the right place so we just reset stuff
        if (config.onDragClass) {
          jQuery(droppedRow).removeClass(config.onDragClass);
        } else {
          jQuery(droppedRow).css(config.onDropStyle);
        }
        jQuery.tableDnD.dragObject = null;
        if (config.onDrop) {
          // Call the onDrop method if there is one
          config.onDrop(jQuery.tableDnD.currentTable, droppedRow);
        }
        jQuery.tableDnD.currentTable = null; // let go of the table too
      }
    },
  
    serialize: function() {
      if (jQuery.tableDnD.currentTable) {
        return jQuery.tableDnD.serializeTable(jQuery.tableDnD.currentTable);
      } else {
        return "Error: No Table id set, you need to set an id on your table and every row";
      }
    },
  
    serializeTable: function(table) {
      var result = "";
      var tableId = table.id;
      var rows = table.rows;
      for (var i = 0; i < rows.length; i++) {
        if (result.length > 0) result += "&";
        var rowId = rows[i].id;
        if (rowId && rowId && table.tableDnDConfig && table.tableDnDConfig.serializeRegexp) {
          rowId = rowId.match(table.tableDnDConfig.serializeRegexp)[0];
        }
  
        result += tableId + '[]=' + rowId;
      }
      return result;
    },
  
    serializeTables: function() {
      var result = "";
      this.each(function() {
        // this is now bound to each matching table
        result += jQuery.tableDnD.serializeTable(this);
      });
      return result;
    }
  
  }
  
  jQuery.fn.extend(
          {
            tableDnD : jQuery.tableDnD.build,
            tableDnDUpdate : jQuery.tableDnD.updateTables,
            tableDnDSerialize: jQuery.tableDnD.serializeTables
          }
  );