use a python feature for unsupported operations

src/Mod/OpenSCAD/OpenSCADFeatures.py

@@ -75,6 +75,9 @@ class ViewProviderTree:
             objs.extend(self.Object.Objects)
         if hasattr(self.Object,"Components"):
             objs.extend(self.Object.Components)
+        if hasattr(self.Object,"Children"):
+            objs.extend(self.Object.Children)
+
         return objs
    
     def getIcon(self):
@@ -215,6 +218,19 @@ static char * openscadlogo_xpm[] = {
 "4444444444444444"};
 """
 
+class OpenSCADPlaceholder:
+    def __init__(self,obj,children=None,arguments=None):
+        obj.addProperty("App::PropertyLinkList",'Children','OpenSCAD',"Base Objects")
+        obj.addProperty("App::PropertyString",'Arguments','OpenSCAD',"Arguments")
+        obj.Proxy = self
+        if children:
+            obj.Children = children
+        if arguments:
+            obj.Arguments = arguments
+             
+    def execute(self,fp):
+        import Part
+        fp.Shape = Part.Compound([]) #empty Shape
 
 class MatrixTransform:
     def __init__(self, obj,matrix=None,child=None):

src/Mod/OpenSCAD/importCSG.py

@@ -341,16 +341,32 @@ def p_operation(p):
               | projection_action
               '''
     p[0] = p[1]
-
+    
+    
 def p_not_supported(p):
     '''
-    not_supported : hull LPAREN RPAREN OBRACE block_list EBRACE
+    not_supported : hull LPAREN keywordargument_list RPAREN OBRACE block_list EBRACE
                   | minkowski LPAREN keywordargument_list RPAREN OBRACE block_list EBRACE
-                  | glide LPAREN RPAREN OBRACE block_list EBRACE
+                  | glide LPAREN keywordargument_list RPAREN OBRACE block_list EBRACE
                   '''
-    if gui:
+    if gui and not FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD").\
+            GetBool('usePlaceholderForUnsupported'):
         from PyQt4 import QtGui
         QtGui.QMessageBox.critical(None, unicode(translate('OpenSCAD',"Unsupported Function"))+" : "+p[1],unicode(translate('OpenSCAD',"Press OK")))
+    else:
+        from OpenSCADFeatures import OpenSCADPlaceholder
+        newobj=doc.addObject("Part::FeaturePython",p[1])
+        OpenSCADPlaceholder(newobj,p[6],str(p[3]))
+    if gui:
+        if FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD").\
+            GetBool('useViewProviderTree'):
+            from OpenSCADFeatures import ViewProviderTree
+            ViewProviderTree(newobj.ViewObject)
+        else:
+            newobj.ViewObject.Proxy = 0
+        #don't hide the children
+    p[0] = [newobj]
+
     
 def p_size_vector(p):
     'size_vector : OSQUARE NUMBER COMMA NUMBER COMMA NUMBER ESQUARE'