Patch for edge bounds calculation in mxGraph.getBoundingBoxFromGeometry

mxgraphPatchBoundingBox.js

mxGraph.prototype.getBoundingBoxFromGeometry = function(cells, includeEdges)
{
  includeEdges = (includeEdges != null) ? includeEdges : false;
	var result = null;
	
	if (cells != null)
	{
		for (var i = 0; i < cells.length; i++)
		{
			if (includeEdges || this.model.isVertex(cells[i]))
			{
				// Computes the bounding box for the points in the geometry
				var geo = this.getCellGeometry(cells[i]);
				
				if (geo != null)
				{
					var pts = geo.points;
					
					if (pts != null && pts.length > 0)
					{
						var tmp = new mxRectangle(pts[0].x, pts[0].y, 0, 0);
						var addPoint = function(pt)
						{
							if (pt != null)
							{
								tmp.add(new mxRectangle(pt.x, pt.y, 0, 0));
							}
						};
						
						for (var j = 1; j < pts.length; j++)
						{
							addPoint(pts[j]);
						}
						
						addPoint(geo.getTerminalPoint(true));
						addPoint(geo.getTerminalPoint(false));
						
						geo = tmp;
					}
					
					if (result == null)
					{
						result = new mxRectangle(geo.x, geo.y, geo.width, geo.height);
					}
					else
					{
						result.add(geo);
					}
				}
			}
		}
	}
	
	return result;
};