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+/**
+ * $Id: mxGraphAbstractHierarchyCell.js,v 1.12 2010-01-04 11:18:26 gaudenz Exp $
+ * Copyright (c) 2006-2010, JGraph Ltd
+ */
+/**
+ * Class: mxGraphAbstractHierarchyCell
+ * 
+ * An abstraction of an internal hierarchy node or edge
+ * 
+ * Constructor: mxGraphAbstractHierarchyCell
+ *
+ * Constructs a new hierarchical layout algorithm.
+ *
+ * Arguments:
+ * 
+ * graph - Reference to the enclosing <mxGraph>.
+ * deterministic - Optional boolean that specifies if this layout should be
+ * deterministic. Default is true.
+ */
+function mxGraphAbstractHierarchyCell()
+{
+	this.x = [];
+	this.y = [];
+	this.temp = [];
+};
+
+/**
+ * Variable: maxRank
+ * 
+ * The maximum rank this cell occupies. Default is -1.
+ */
+mxGraphAbstractHierarchyCell.prototype.maxRank = -1;
+
+/**
+ * Variable: minRank
+ * 
+ * The minimum rank this cell occupies. Default is -1.
+ */
+mxGraphAbstractHierarchyCell.prototype.minRank = -1;
+
+/**
+ * Variable: x
+ * 
+ * The x position of this cell for each layer it occupies
+ */
+mxGraphAbstractHierarchyCell.prototype.x = null;
+
+/**
+ * Variable: y
+ * 
+ * The y position of this cell for each layer it occupies
+ */
+mxGraphAbstractHierarchyCell.prototype.y = null;
+
+/**
+ * Variable: width
+ * 
+ * The width of this cell
+ */
+mxGraphAbstractHierarchyCell.prototype.width = 0;
+
+/**
+ * Variable: height
+ * 
+ * The height of this cell
+ */
+mxGraphAbstractHierarchyCell.prototype.height = 0;
+
+/**
+ * Variable: nextLayerConnectedCells
+ * 
+ * A cached version of the cells this cell connects to on the next layer up
+ */
+mxGraphAbstractHierarchyCell.prototype.nextLayerConnectedCells = null;
+
+/**
+ * Variable: previousLayerConnectedCells
+ * 
+ * A cached version of the cells this cell connects to on the next layer down
+ */
+mxGraphAbstractHierarchyCell.prototype.previousLayerConnectedCells = null;
+
+/**
+ * Variable: temp
+ * 
+ * Temporary variable for general use. Generally, try to avoid
+ * carrying information between stages. Currently, the longest
+ * path layering sets temp to the rank position in fixRanks()
+ * and the crossing reduction uses this. This meant temp couldn't
+ * be used for hashing the nodes in the model dfs and so hashCode
+ * was created
+ */
+mxGraphAbstractHierarchyCell.prototype.temp = null;
+
+/**
+ * Function: getNextLayerConnectedCells
+ * 
+ * Returns the cells this cell connects to on the next layer up
+ */
+mxGraphAbstractHierarchyCell.prototype.getNextLayerConnectedCells = function(layer)
+{
+	return null;
+};
+
+/**
+ * Function: getPreviousLayerConnectedCells
+ * 
+ * Returns the cells this cell connects to on the next layer down
+ */
+mxGraphAbstractHierarchyCell.prototype.getPreviousLayerConnectedCells = function(layer)
+{
+	return null;
+};
+
+/**
+ * Function: isEdge
+ * 
+ * Returns whether or not this cell is an edge
+ */
+mxGraphAbstractHierarchyCell.prototype.isEdge = function()
+{
+	return false;
+};
+
+/**
+ * Function: isVertex
+ * 
+ * Returns whether or not this cell is a node
+ */
+mxGraphAbstractHierarchyCell.prototype.isVertex = function()
+{
+	return false;
+};
+
+/**
+ * Function: getGeneralPurposeVariable
+ * 
+ * Gets the value of temp for the specified layer
+ */
+mxGraphAbstractHierarchyCell.prototype.getGeneralPurposeVariable = function(layer)
+{
+	return null;
+};
+
+/**
+ * Function: setGeneralPurposeVariable
+ * 
+ * Set the value of temp for the specified layer
+ */
+mxGraphAbstractHierarchyCell.prototype.setGeneralPurposeVariable = function(layer, value)
+{
+	return null;
+};
+
+/**
+ * Function: setX
+ * 
+ * Set the value of x for the specified layer
+ */
+mxGraphAbstractHierarchyCell.prototype.setX = function(layer, value)
+{
+	if (this.isVertex())
+	{
+		this.x[0] = value;
+	}
+	else if (this.isEdge())
+	{
+		this.x[layer - this.minRank - 1] = value;
+	}
+};
+
+/**
+ * Function: getX
+ * 
+ * Gets the value of x on the specified layer
+ */
+mxGraphAbstractHierarchyCell.prototype.getX = function(layer)
+{
+	if (this.isVertex())
+	{
+		return this.x[0];
+	}
+	else if (this.isEdge())
+	{
+		return this.x[layer - this.minRank - 1];
+	}
+
+	return 0.0;
+};
+
+/**
+ * Function: setY
+ * 
+ * Set the value of y for the specified layer
+ */
+mxGraphAbstractHierarchyCell.prototype.setY = function(layer, value)
+{
+	if (this.isVertex())
+	{
+		this.y[0] = value;
+	}
+	else if (this.isEdge())
+	{
+		this.y[layer -this. minRank - 1] = value;
+	}
+};