setting to ignore ANSI escapes for backgrounds

The new setting "interpret_ansi_background" (boolean, defaults to
False), allows to disable interpretation of ANSI escape characters that
change the background colour of text.

Author: pazz

alot/defaults/alot.rc.spec

@@ -13,6 +13,9 @@ attachment_prefix = string(default='~')
 # timeout in (floating point) seconds until partial input is cleared
 input_timeout = float(default=1.0)
 
+# display background colors set by ANSI character escapes
+interpret_ansi_background = boolean(default=True)
+
 # confirm exit
 bug_on_exit = boolean(default=False)
 

alot/widgets/ansi.py

@@ -17,7 +17,7 @@ def __init__(self, txt,
                                                default_attr_focus,
                                                ansi_background)
         t = urwid.Text(ct, **kwds)
-        attr_map = {default_attr.background: ''}
+        attr_map = { default_attr.background: ''}
         w = urwid.AttrMap(t, attr_map, focus_map)
         urwid.WidgetWrap.__init__(self, w)
 

alot/widgets/thread.py

@@ -85,8 +85,9 @@ def __init__(self, content, attr=None, attr_focus=None):
         """
         structure = []
         for line in content.splitlines():
+            ansi_background = settings.get("interpret_ansi_background")
             structure.append((ANSIText(line, attr, attr_focus,
-                                       ansi_background=False), None))
+                                       ansi_background), None))
         SimpleTree.__init__(self, structure)
 
 

docs/source/configuration/alotrc_table

@@ -354,6 +354,16 @@
     :default: 1.0
 
 
+.. _interpret-ansi-background:
+
+.. describe:: interpret_ansi_background
+
+     display background colors set by ANSI character escapes
+
+    :type: boolean
+    :default: True
+
+
 .. _mailinglists:
 
 .. describe:: mailinglists