Fix units statement. Keep track of original macro statement in the AMGroup

gerber/gerber_statements.py

@@ -176,7 +176,7 @@ class MOParamStmt(ParamStmt):
     
     @classmethod
     def from_units(cls, units):
-        return cls(None, 'inch')
+        return cls(None, units)
 
     @classmethod
     def from_dict(cls, stmt_dict):
@@ -425,7 +425,7 @@ class AMParamStmt(ParamStmt):
             else:
                 self.primitives.append(AMUnsupportPrimitive.from_gerber(primitive))
                 
-        return AMGroup(self.primitives, units=self.units)
+        return AMGroup(self.primitives, stmt=self, units=self.units)
 
     def to_inch(self):
         if self.units == 'metric':

gerber/primitives.py

@@ -763,9 +763,9 @@ class Polygon(Primitive):
         return points
     
     def equivalent(self, other, offset):
-        '''
+        """
         Is this the outline the same as the other, ignoring the position offset?
-        '''
+        """
         
         # Quick check if it even makes sense to compare them
         if type(self) != type(other) or self.sides != other.sides or self.radius != other.radius:
@@ -779,7 +779,11 @@ class Polygon(Primitive):
 class AMGroup(Primitive):
     """
     """
-    def __init__(self, amprimitives, **kwargs):
+    def __init__(self, amprimitives, stmt = None, **kwargs):
+        """
+        
+        stmt : The original statment that generated this, since it is really hard to re-generate from primitives
+        """
         super(AMGroup, self).__init__(**kwargs)
         
         self.primitives = []
@@ -792,6 +796,7 @@ class AMGroup(Primitive):
                self.primitives.append(prim)
         self._position = None
         self._to_convert = ['primitives']
+        self.stmt = stmt
         
     @property
     def flashed(self):

gerber/render/rs274x_backend.py

@@ -14,7 +14,7 @@ class AMGroupContext(object):
     def render(self, amgroup, name):
         
         # Clone ourselves, then offset by the psotion so that
-        # our render doesn't have to consider offset. Just makes things simplder
+        # our render doesn't have to consider offset. Just makes things simpler
         nooffset_group = deepcopy(amgroup)
         nooffset_group.position = (0, 0)