updated common library to support DSM export using vega

Author: eosfor

PSGraph.Common/Interface/IDsmView.cs

@@ -5,7 +5,10 @@ namespace PSGraph.DesignStructureMatrix
     public interface IDsmView
     {
         public abstract SvgDocument ToSvg();
+        public abstract string ToSvgString();
         public abstract void ExportText(string Path);
+        public abstract string ExportText();
+        public abstract string ToVegaSpec(VegaExportTypes exportType, string modulePath);
         public string ExportGraphViz();
     }
 }

PSGraph.Common/Model/DSMExportTypes.cs

@@ -2,7 +2,10 @@
 {
     public enum DSMExportTypes
     {
-        SVG,
-        TEXT
+        //TODO: replaced with Vega as visual was really bad. perhaps need to rewrite it
+        //SVG,
+        TEXT,
+        VEGA_JSON,
+        VEGA_HTML
     }
 }