Provide Color class mapping

Dynamically generate the AttrMap's based on our palette keys.

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>

subiquity/ui/utils.py

@@ -16,7 +16,9 @@
 """ UI utilities """
 
 from urwid import Padding as _Padding
+from urwid import AttrMap
 from functools import partialmethod
+from subiquity.palette import STYLES
 
 
 def apply_padders(cls):
@@ -45,14 +47,32 @@ def apply_padders(cls):
                 partialmethod(_Padding, align='center',
                               width=('relative', i)))
         setattr(cls, 'left_{}'.format(i),
-                partialmethod(_Padding, align='left',
-                              width=('relative', i)))
+                partialmethod(_Padding, left=i))
         setattr(cls, 'right_{}'.format(i),
-                partialmethod(_Padding, align='right',
-                              width=('relative', i)))
+                partialmethod(_Padding, right=i))
     return cls
 
 
 @apply_padders
 class Padding:
+    """ Partial methods for :class:`urwid.Padding` """
+    pass
+
+
+def apply_style_map(cls):
+    """ Applies AttrMap attributes to Color class
+
+    Eg:
+
+      Color.frame_header(Text("I'm text in the Orange frame header"))
+      Color.body(Text("Im text in wrapped with the body color"))
+    """
+    for k in STYLES:
+        setattr(cls, k[0], partialmethod(AttrMap, attr_map=k[0]))
+    return cls
+
+
+@apply_style_map
+class Color:
+    """ Partial methods for :class:`urwid.AttrMap` """
     pass