},

   _createCornerSlice: function(color,bgColor, n, position) {
      var slice = document.createElement("span");

      var inStyle = slice.style;
      inStyle.backgroundColor = color;
      inStyle.display  = "block";
      inStyle.height   = "1px";
      inStyle.overflow = "hidden";
      inStyle.fontSize = "1px";

      var borderColor = this._borderColor(color,bgColor);
      if ( this.options.border && n == 0 ) {
         inStyle.borderTopStyle    = "solid";
         inStyle.borderTopWidth    = "1px";
         inStyle.borderLeftWidth   = "0px";
         inStyle.borderRightWidth  = "0px";
         inStyle.borderBottomWidth = "0px";
         inStyle.height            = "0px"; // assumes css compliant box model
         inStyle.borderColor       = borderColor;
      }
      else if(borderColor) {
         inStyle.borderColor = borderColor;
         inStyle.borderStyle = "solid";
         inStyle.borderWidth = "0px 1px";
      }

      if ( !this.options.compact && (n == (this.options.numSlices-1)) )
         inStyle.height = "2px";

      this._setMargin(slice, n, position);
      this._setBorder(slice, n, position);
      return slice;
   },

   _setOptions: function(options) {
      this.options = {
         corners : "all",
         color   : "fromElement",
         bgColor : "fromParent",
         blend   : true,
         border  : false,
         compact : false
      }
      Object.extend(this.options, options || {});

      this.options.numSlices = this.options.compact ? 2 : 4;
      if ( this._isTransparent() )
         this.options.blend = false;
   },

   _whichSideTop: function() {
      if ( this._hasString(this.options.corners, "all", "top") )
         return "";

      if ( this.options.corners.indexOf("tl") >= 0 && this.options.corners.indexOf("tr") >= 0 )
         return "";

      if (this.options.corners.indexOf("tl") >= 0)
         return "left";
      else if (this.options.corners.indexOf("tr") >= 0)
          return "right";
      return "";
   },

   _whichSideBottom: function() {
      if ( this._hasString(this.options.corners, "all", "bottom") )
         return "";

      if ( this.options.corners.indexOf("bl")>=0 && this.options.corners.indexOf("br")>=0 )
         return "";

      if(this.options.corners.indexOf("bl") >=0)
         return "left";
      else if(this.options.corners.indexOf("br")>=0)
         return "right";
      return "";
   },

   _borderColor : function(color,bgColor) {
      if ( color == "transparent" )
         return bgColor;
      else if ( this.options.border )
         return this.options.border;
      else if ( this.options.blend )
         return this._blend( bgColor, color );
      else
         return "";
   },


   _setMargin: function(el, n, corners) {
      var marginSize = this._marginSize(n);
      var whichSide = corners == "top" ? this._whichSideTop() : this._whichSideBottom();

      if ( whichSide == "left" ) {
         el.style.marginLeft = marginSize + "px"; el.style.marginRight = "0px";
      }
      else if ( whichSide == "right" ) {
         el.style.marginRight = marginSize + "px"; el.style.marginLeft  = "0px";
      }
      else {
         el.style.marginLeft = marginSize + "px"; el.style.marginRight = marginSize + "px";
      }
   },

   _setBorder: function(el,n,corners) {
      var borderSize = this._borderSize(n);
      var whichSide = corners == "top" ? this._whichSideTop() : this._whichSideBottom();
      if ( whichSide == "left" ) {
         el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = "0px";
      }
      else if ( whichSide == "right" ) {
         el.style.borderRightWidth = borderSize + "px"; el.style.borderLeftWidth  = "0px";
      }
      else {
         el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = borderSize + "px";
      }
      if (this.options.border != false)
        el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = borderSize + "px";
   },

   _marginSize: function(n) {
      if ( this._isTransparent() )
         return 0;

      var marginSizes          = [ 5, 3, 2, 1 ];
      var blendedMarginSizes   = [ 3, 2, 1, 0 ];
      var compactMarginSizes   = [ 2, 1 ];
      var smBlendedMarginSizes = [ 1, 0 ];

      if ( this.options.compact && this.options.blend )
         return smBlendedMarginSizes[n];
      else if ( this.options.compact )
         return compactMarginSizes[n];
      else if ( this.options.blend )
         return blendedMarginSizes[n];
      else
         return marginSizes[n];
   },

   _borderSize: function(n) {
      var transparentBorderSizes = [ 5, 3, 2, 1 ];
      var blendedBorderSizes     = [ 2, 1, 1, 1 ];
      var compactBorderSizes     = [ 1, 0 ];
      var actualBorderSizes      = [ 0, 2, 0, 0 ];

      if ( this.options.compact && (this.options.blend || this._isTransparent()) )
         return 1;
      else if ( this.options.compact )
         return compactBorderSizes[n];
      else if ( this.options.blend )
         return blendedBorderSizes[n];
      else if ( this.options.border )
         return actualBorderSizes[n];
      else if ( this._isTransparent() )
         return transparentBorderSizes[n];
      return 0;
   },

   _hasString: function(str) { for(var i=1 ; i<arguments.length ; i++) if (str.indexOf(arguments[i]) >= 0) return true; return false; },
   _blend: function(c1, c2) { var cc1 = Rico.Color.createFromHex(c1); cc1.blend(Rico.Color.createFromHex(c2)); return cc1; },
   _background: function(el) { try { return Rico.Color.createColorFromBackground(el).asHex(); } catch(err) { return "#ffffff"; } },
   _isTransparent: function() { return this.options.color == "transparent"; },
   _isTopRounded: function() { return this._hasString(this.options.corners, "all", "top", "tl", "tr"); },
   _isBottomRounded: function() { return this._hasString(this.options.corners, "all", "bottom", "bl", "br"); },
   _hasSingleTextChild: function(el) { return el.childNodes.length == 1 && el.childNodes[0].nodeType == 3; }
}


//-------------------- ricoDragAndDrop.js
Rico.DragAndDrop = Class.create();

Rico.DragAndDrop.prototype = {

   initialize: function() {
      this.dropZones                = new Array();
      this.draggables               = new Array();
      this.currentDragObjects       = new Array();
      this.dragElement              = null;
      this.lastSelectedDraggable    = null;
      this.currentDragObjectVisible = false;
      this.interestedInMotionEvents = false;
      this._mouseDown = this._mouseDownHandler.bindAsEventListener(this);
      this._mouseMove = this._mouseMoveHandler.bindAsEventListener(this);
      this._mouseUp = this._mouseUpHandler.bindAsEventListener(this);
   },

   registerDropZone: function(aDropZone) {
      this.dropZones[ this.dropZones.length ] = aDropZone;
   },

   deregisterDropZone: function(aDropZone) {
      var newDropZones = new Array();
      var j = 0;
      for ( var i = 0 ; i < this.dropZones.length ; i++ ) {
         if ( this.dropZones[i] != aDropZone )
            newDropZones[j++] = this.dropZones[i];
      }

      this.dropZones = newDropZones;
   },

   clearDropZones: function() {
      this.dropZones = new Array();
   },

   registerDraggable: function( aDraggable ) {
      this.draggables[ this.draggables.length ] = aDraggable;
      this._addMouseDownHandler( aDraggable );
   },

   clearSelection: function() {
      for ( var i = 0 ; i < this.currentDragObjects.length ; i++ )
         this.currentDragObjects[i].deselect();
      this.currentDragObjects = new Array();
      this.lastSelectedDraggable = null;
   },

   hasSelection: function() {
      return this.currentDragObjects.length > 0;
   },

   setStartDragFromElement: function( e, mouseDownElement ) {
      this.origPos = RicoUtil.toDocumentPosition(mouseDownElement);
      this.startx = e.screenX - this.origPos.x
      this.starty = e.screenY - this.origPos.y
      //this.startComponentX = e.layerX ? e.layerX : e.offsetX;
      //this.startComponentY = e.layerY ? e.layerY : e.offsetY;
      //this.adjustedForDraggableSize = false;

      this.interestedInMotionEvents = this.hasSelection();
      this._terminateEvent(e);
   },

   updateSelection: function( draggable, extendSelection ) {
      if ( ! extendSelection )
         this.clearSelection();

      if ( draggable.isSelected() ) {
         this.currentDragObjects.removeItem(draggable);
         draggable.deselect();
         if ( draggable == this.lastSelectedDraggable )
            this.lastSelectedDraggable = null;
      }
      else {
         this.currentDragObjects[ this.currentDragObjects.length ] = draggable;
         draggable.select();
         this.lastSelectedDraggable = draggable;
      }
   },

   _mouseDownHandler: function(e) {
      if ( arguments.length == 0 )
         e = event;

      // if not button 1 ignore it...
      var nsEvent = e.which != undefined;
      if ( (nsEvent && e.which != 1) || (!nsEvent && e.button != 1))
         return;

      var eventTarget      = e.target ? e.target : e.srcElement;
      var draggableObject  = eventTarget.draggable;

      var candidate = eventTarget;
      while (draggableObject == null && candidate.parentNode) {
         candidate = candidate.parentNode;
         draggableObject = candidate.draggable;
      }
   
      if ( draggableObject == null )
         return;

      this.updateSelection( draggableObject, e.ctrlKey );

      // clear the drop zones postion cache...
      if ( this.hasSelection() )
         for ( var i = 0 ; i < this.dropZones.length ; i++ )
            this.dropZones[i].clearPositionCache();

      this.setStartDragFromElement( e, draggableObject.getMouseDownHTMLElement() );
   },


   _mouseMoveHandler: function(e) {
      var nsEvent = e.which != undefined;
      if ( !this.interestedInMotionEvents ) {
         //this._terminateEvent(e);
         return;
      }

      if ( ! this.hasSelection() )
         return;

      if ( ! this.currentDragObjectVisible )
         this._startDrag(e);

      if ( !this.activatedDropZones )
         this._activateRegisteredDropZones();

      //if ( !this.adjustedForDraggableSize )
      //   this._adjustForDraggableSize(e);

      this._updateDraggableLocation(e);
      this._updateDropZonesHover(e);

      this._terminateEvent(e);
   },

   _makeDraggableObjectVisible: function(e)
   {
      if ( !this.hasSelection() )
         return;

      var dragElement;
      if ( this.currentDragObjects.length > 1 )
         dragElement = this.currentDragObjects[0].getMultiObjectDragGUI(this.currentDragObjects);
      else
         dragElement = this.currentDragObjects[0].getSingleObjectDragGUI();

      // go ahead and absolute position it...
      if ( RicoUtil.getElementsComputedStyle(dragElement, "position")  != "absolute" )
         dragElement.style.position = "absolute";

      // need to parent him into the document...
      if ( dragElement.parentNode == null || dragElement.parentNode.nodeType == 11 )
         document.body.appendChild(dragElement);

      this.dragElement = dragElement;
      this._updateDraggableLocation(e);

      this.currentDragObjectVisible = true;
   },

   /**
   _adjustForDraggableSize: function(e) {
      var dragElementWidth  = this.dragElement.offsetWidth;
      var dragElementHeight = this.dragElement.offsetHeight;
      if ( this.startComponentX > dragElementWidth )
         this.startx -= this.startComponentX - dragElementWidth + 2;
      if ( e.offsetY ) {
         if ( this.startComponentY > dragElementHeight )
            this.starty -= this.startComponentY - dragElementHeight + 2;
      }
      this.adjustedForDraggableSize = true;
   },
   **/

   _leftOffset: function(e) {
	   return e.offsetX ? document.body.scrollLeft : 0
	},

   _topOffset: function(e) {
	   return e.offsetY ? document.body.scrollTop:0
	},

		
   _updateDraggableLocation: function(e) {
      var dragObjectStyle = this.dragElement.style;
      dragObjectStyle.left = (e.screenX + this._leftOffset(e) - this.startx) + "px"
      dragObjectStyle.top  = (e.screenY + this._topOffset(e) - this.starty) + "px";
   },

   _updateDropZonesHover: function(e) {
      var n = this.dropZones.length;
      for ( var i = 0 ; i < n ; i++ ) {
         if ( ! this._mousePointInDropZone( e, this.dropZones[i] ) )
            this.dropZones[i].hideHover();
      }

      for ( var i = 0 ; i < n ; i++ ) {
         if ( this._mousePointInDropZone( e, this.dropZones[i] ) ) {
            if ( this.dropZones[i].canAccept(this.currentDragObjects) )
               this.dropZones[i].showHover();
         }
      }
   },

   _startDrag: function(e) {
      for ( var i = 0 ; i < this.currentDragObjects.length ; i++ )
         this.currentDragObjects[i].startDrag();

      this._makeDraggableObjectVisible(e);
   },

   _mouseUpHandler: function(e) {
      if ( ! this.hasSelection() )
         return;

      var nsEvent = e.which != undefined;
      if ( (nsEvent && e.which != 1) || (!nsEvent && e.button != 1))
         return;

      this.interestedInMotionEvents = false;

      if ( this.dragElement == null ) {
         this._terminateEvent(e);
         return;
      }

      if ( this._placeDraggableInDropZone(e) )
         this._completeDropOperation(e);