From 3d725845c08fe0897ade3bcd6b86c654ab8d5228 Mon Sep 17 00:00:00 2001
From: Marion <marion.zepf@gmail.com>
Date: Thu, 12 Sep 2013 23:52:40 +0000
Subject: make Media objects exportable

---
diff --git a/TurtleArt/taprimitive.py b/TurtleArt/taprimitive.py
index b2b2d09..ec30e6c 100644
--- a/TurtleArt/taprimitive.py
+++ b/TurtleArt/taprimitive.py
@@ -25,6 +25,7 @@ from random import uniform
 
 #from ast_pprint import * # only used for debugging, safe to comment out
 
+from tablock import Media
 from tacanvas import TurtleGraphics
 from taconstants import (Color, CONSTANTS)
 from talogo import (LogoCode, logoerror, NegativeRootError)
@@ -1041,20 +1042,25 @@ def value_to_ast(value, *args_for_prim, **kwargs_for_prim):
     bool, basestring, list
     If the value is already an AST, return it unchanged.
     If the value is a non-exportable Primitive, return None. """
-    # TODO media
+    # already an AST
     if isinstance(value, ast.AST):
         return value
+    # Primitive
     elif isinstance(value, Primitive):
         if value.export_me:
             return value.get_ast(*args_for_prim, **kwargs_for_prim)
         else:
             return None
+    # boolean
     elif isinstance(value, bool):
         return ast.Name(id=str(value), ctx=ast.Load)
+    # number
     elif isinstance(value, (int, float)):
         return ast.Num(n=value)
+    # string
     elif isinstance(value, basestring):
         return ast.Str(value)
+    # list (recursively transform to an AST)
     elif isinstance(value, list):
         ast_list = []
         for item in value:
@@ -1062,16 +1068,22 @@ def value_to_ast(value, *args_for_prim, **kwargs_for_prim):
             if item_ast is not None:
                 ast_list.append(item_ast)
         return ast.List(elts=ast_list, ctx=ast.Load)
+    # color
     elif isinstance(value, Color):
         # call to the Color constructor with this object's values,
         # e.g., Color('red', 0, 50, 100)
         return get_call_ast('Color', [value.name, value.color,
                                       value.shade, value.gray],
                             return_type=TYPE_COLOR)
+    # media
+    elif isinstance(value, Media):
+        args = [value_to_ast(value.type), value_to_ast(value.value)]
+        return get_call_ast('Media', args, return_type=TYPE_MEDIA)
+    # unknown
     else:
         raise ValueError("unknown type of raw value: " + repr(type(value)))
 
-def ast_to_value(ast_object):
+def ast_to_value(ast_object):  # TODO make obsolete and remove
     """ Retrieve the value out of a value AST. Supported AST types:
     Num, Str, Name, List, Tuple, Set
     If no value can be extracted, return None. """
diff --git a/TurtleArt/tatype.py b/TurtleArt/tatype.py
index 3a14fbf..1402014 100644
--- a/TurtleArt/tatype.py
+++ b/TurtleArt/tatype.py
@@ -23,6 +23,7 @@
 import ast
 from gettext import gettext as _
 
+from tablock import Media
 from taconstants import (Color, CONSTANTS)
 from tautils import debug_output
 
@@ -74,11 +75,11 @@ TYPE_CHAR = Type('TYPE_CHAR', 1)
 TYPE_COLOR = Type('TYPE_COLOR', 2)
 TYPE_FLOAT = Type('TYPE_FLOAT', 3)
 TYPE_INT = Type('TYPE_INT', 4)
+TYPE_MEDIA = Type('TYPE_MEDIA', 10)
 TYPE_NUMBER = Type('TYPE_NUMBER', 6)  # shortcut to avoid a TypeDisjunction
     # between TYPE_FLOAT and TYPE_INT
 TYPE_NUMERIC_STRING = Type('TYPE_NUMERIC_STRING', 7)
 TYPE_STRING = Type('TYPE_STRING', 9)
-# TODO add list types
 
 
 BOX_AST = ast.Name(id='BOX', ctx=ast.Load)
@@ -104,6 +105,8 @@ def get_type(x):
             return (TYPE_NUMERIC_STRING, False)
     elif isinstance(x, Color):
         return (TYPE_COLOR, False)
+    elif isinstance(x, Media):
+        return (TYPE_MEDIA, False)
     elif hasattr(x, "return_type"):
         return (x.return_type, False)
 
@@ -133,6 +136,10 @@ def get_type(x):
                 return (TYPE_CHAR, True)
             elif x.func.id in ('repr', 'str', 'unicode'):
                 return (TYPE_STRING, True)
+            elif x.func.id == 'Color':
+                return (TYPE_COLOR, True)
+            elif x.func.id == 'Media':
+                return (TYPE_MEDIA, True)
     # unary operands never change the type of their argument
     elif isinstance(x, ast.UnaryOp):
         if issubclass(x.op, ast.Not):
@@ -146,9 +153,9 @@ def get_type(x):
     # other binary operators
     elif isinstance(x, ast.BinOp):
         type_left = get_type(x.left)[0]
-        if type_left == TYPE_STRING:
-            return (TYPE_STRING, True)
         type_right = get_type(x.right)[0]
+        if type_left == TYPE_STRING or type_right == TYPE_STRING:
+            return (TYPE_STRING, True)
         if type_left == type_right == TYPE_INT:
             return (TYPE_INT, True)
         else:
diff --git a/pyexported/window_setup.py b/pyexported/window_setup.py
index 9586f2c..62947dd 100644
--- a/pyexported/window_setup.py
+++ b/pyexported/window_setup.py
@@ -39,7 +39,7 @@ from TurtleArt.taconstants import (HORIZONTAL_PALETTE, VERTICAL_PALETTE, BLOCK_S
                          EXPANDABLE_FLOW, SUFFIX)
 from TurtleArt.talogo import (LogoCode, primitive_dictionary, logoerror)
 from TurtleArt.tacanvas import TurtleGraphics
-from TurtleArt.tablock import (Blocks, Block)
+from TurtleArt.tablock import (Blocks, Block, Media)
 from TurtleArt.taturtle import (Turtles, Turtle)
 from TurtleArt.tautils import (magnitude, get_load_name, get_save_name, data_from_file,
                      data_to_file, round_int, get_id, get_pixbuf_from_journal,
--
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