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diff --git a/src/js/view/mxStylesheet.js b/src/js/view/mxStylesheet.js
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+/**
+ * $Id: mxStylesheet.js,v 1.35 2010-03-26 10:24:58 gaudenz Exp $
+ * Copyright (c) 2006-2010, JGraph Ltd
+ */
+/**
+ * Class: mxStylesheet
+ * 
+ * Defines the appearance of the cells in a graph. See <putCellStyle> for an
+ * example of creating a new cell style. It is recommended to use objects, not
+ * arrays for holding cell styles. Existing styles can be cloned using
+ * <mxUtils.clone> and turned into a string for debugging using
+ * <mxUtils.toString>.
+ *
+ * Default Styles:
+ * 
+ * The stylesheet contains two built-in styles, which are used if no style is
+ * defined for a cell:
+ *
+ *   defaultVertex - Default style for vertices
+ *   defaultEdge - Default style for edges
+ * 
+ * Example:
+ * 
+ * (code)
+ * var vertexStyle = stylesheet.getDefaultVertexStyle();
+ * vertexStyle[mxConstants.ROUNDED] = true;
+ * var edgeStyle = stylesheet.getDefaultEdgeStyle();
+ * edgeStyle[mxConstants.STYLE_EDGE] = mxEdgeStyle.EntityRelation;
+ * (end)
+ * 
+ * Modifies the built-in default styles.
+ * 
+ * To avoid the default style for a cell, add a leading semicolon
+ * to the style definition, eg.
+ * 
+ * (code)
+ * ;shadow=1
+ * (end)
+ * 
+ * Removing keys:
+ * 
+ * For removing a key in a cell style of the form [stylename;|key=value;] the
+ * special value none can be used, eg. highlight;fillColor=none
+ * 
+ * See also the helper methods in mxUtils to modify strings of this format,
+ * namely <mxUtils.setStyle>, <mxUtils.indexOfStylename>,
+ * <mxUtils.addStylename>, <mxUtils.removeStylename>,
+ * <mxUtils.removeAllStylenames> and <mxUtils.setStyleFlag>.
+ * 
+ * Constructor: mxStylesheet
+ * 
+ * Constructs a new stylesheet and assigns default styles.
+ */
+function mxStylesheet()
+{
+	this.styles = new Object();
+	
+	this.putDefaultVertexStyle(this.createDefaultVertexStyle());
+	this.putDefaultEdgeStyle(this.createDefaultEdgeStyle());
+};
+
+/**
+ * Function: styles
+ * 
+ * Maps from names to cell styles. Each cell style is a map of key,
+ * value pairs.
+ */
+mxStylesheet.prototype.styles;
+
+/**
+ * Function: createDefaultVertexStyle
+ * 
+ * Creates and returns the default vertex style.
+ */
+mxStylesheet.prototype.createDefaultVertexStyle = function()
+{
+	var style = new Object();
+	
+	style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_RECTANGLE;
+	style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
+	style[mxConstants.STYLE_VERTICAL_ALIGN] = mxConstants.ALIGN_MIDDLE;
+	style[mxConstants.STYLE_ALIGN] = mxConstants.ALIGN_CENTER;
+	style[mxConstants.STYLE_FILLCOLOR] = '#C3D9FF';
+	style[mxConstants.STYLE_STROKECOLOR] = '#6482B9';
+	style[mxConstants.STYLE_FONTCOLOR] = '#774400';
+	
+	return style;
+};
+
+/**
+ * Function: createDefaultEdgeStyle
+ * 
+ * Creates and returns the default edge style.
+ */
+mxStylesheet.prototype.createDefaultEdgeStyle = function()
+{
+	var style = new Object();
+	
+	style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_CONNECTOR;
+	style[mxConstants.STYLE_ENDARROW] = mxConstants.ARROW_CLASSIC;
+	style[mxConstants.STYLE_VERTICAL_ALIGN] = mxConstants.ALIGN_MIDDLE;
+	style[mxConstants.STYLE_ALIGN] = mxConstants.ALIGN_CENTER;
+	style[mxConstants.STYLE_STROKECOLOR] = '#6482B9';
+	style[mxConstants.STYLE_FONTCOLOR] = '#446299';
+	
+	return style;
+};
+
+/**
+ * Function: putDefaultVertexStyle
+ * 
+ * Sets the default style for vertices using defaultVertex as the
+ * stylename.
+ * 
+ * Parameters:
+ * style - Key, value pairs that define the style.
+ */
+mxStylesheet.prototype.putDefaultVertexStyle = function(style)
+{
+	this.putCellStyle('defaultVertex', style);
+};
+
+/**
+ * Function: putDefaultEdgeStyle
+ * 
+ * Sets the default style for edges using defaultEdge as the stylename.
+ */
+mxStylesheet.prototype.putDefaultEdgeStyle = function(style)
+{
+	this.putCellStyle('defaultEdge', style);
+};
+
+/**
+ * Function: getDefaultVertexStyle
+ * 
+ * Returns the default style for vertices.
+ */
+mxStylesheet.prototype.getDefaultVertexStyle = function()
+{
+	return this.styles['defaultVertex'];
+};
+
+/**
+ * Function: getDefaultEdgeStyle
+ * 
+ * Sets the default style for edges.
+ */
+mxStylesheet.prototype.getDefaultEdgeStyle = function()
+{
+	return this.styles['defaultEdge'];
+};
+
+/**
+ * Function: putCellStyle
+ * 
+ * Stores the given map of key, value pairs under the given name in
+ * <styles>.
+ *
+ * Example:
+ * 
+ * The following example adds a new style called 'rounded' into an
+ * existing stylesheet:
+ * 
+ * (code)
+ * var style = new Object();
+ * style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_RECTANGLE;
+ * style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
+ * style[mxConstants.STYLE_ROUNDED] = true;
+ * graph.getStylesheet().putCellStyle('rounded', style);
+ * (end)
+ * 
+ * In the above example, the new style is an object. The possible keys of
+ * the object are all the constants in <mxConstants> that start with STYLE
+ * and the values are either JavaScript objects, such as
+ * <mxPerimeter.RightAngleRectanglePerimeter> (which is in fact a function)
+ * or expressions, such as true. Note that not all keys will be
+ * interpreted by all shapes (eg. the line shape ignores the fill color).
+ * The final call to this method associates the style with a name in the
+ * stylesheet. The style is used in a cell with the following code:
+ * 
+ * (code)
+ * model.setStyle(cell, 'rounded');
+ * (end)
+ * 
+ * Parameters:
+ * 
+ * name - Name for the style to be stored.
+ * style - Key, value pairs that define the style.
+ */
+mxStylesheet.prototype.putCellStyle = function(name, style)
+{
+	this.styles[name] = style;
+};
+
+/**
+ * Function: getCellStyle
+ * 
+ * Returns the cell style for the specified stylename or the given
+ * defaultStyle if no style can be found for the given stylename.
+ * 
+ * Parameters:
+ * 
+ * name - String of the form [(stylename|key=value);] that represents the
+ * style.
+ * defaultStyle - Default style to be returned if no style can be found.
+ */
+mxStylesheet.prototype.getCellStyle = function(name, defaultStyle)
+{
+	var style = defaultStyle;
+	
+	if (name != null && name.length > 0)
+	{
+		var pairs = name.split(';');
+
+		if (style != null &&
+			name.charAt(0) != ';')
+		{
+			style = mxUtils.clone(style);
+		}
+		else
+		{
+			style = new Object();
+		}
+
+		// Parses each key, value pair into the existing style
+	 	for (var i = 0; i < pairs.length; i++)
+	 	{
+	 		var tmp = pairs[i];
+	 		var pos = tmp.indexOf('=');
+	 		
+	 		if (pos >= 0)
+	 		{
+		 		var key = tmp.substring(0, pos);
+		 		var value = tmp.substring(pos + 1);
+
+		 		if (value == mxConstants.NONE)
+		 		{
+		 			delete style[key];
+		 		}
+		 		else if (mxUtils.isNumeric(value))
+		 		{
+		 			style[key] = parseFloat(value);
+		 		}
+		 		else
+		 		{
+			 		style[key] = value;
+		 		}
+			}
+	 		else
+	 		{
+	 			// Merges the entries from a named style
+				var tmpStyle = this.styles[tmp];
+				
+				if (tmpStyle != null)
+				{
+					for (var key in tmpStyle)
+					{
+						style[key] = tmpStyle[key];
+					}
+				}
+	 		}
+		}
+	}
+	
+	return style;
+};