widgets/global: move HeadersList to the only place where it is used

1 files changed, 43 insertions, 2 deletions

diff --git a/alot/buffers/envelope.py b/alot/buffers/envelope.py
index 55745ed0..ae13d74f 100644
--- a/alot/buffers/envelope.py
+++ b/alot/buffers/envelope.py
@@ -6,7 +6,6 @@ import os
 
 from .buffer import Buffer
 from ..settings.const import settings
-from ..widgets.globals import HeadersList
 from ..widgets.globals import AttachmentWidget
 from ..helper import shorten_author_string
 
@@ -49,6 +48,48 @@ def string_sanitize(string, tab_width=8):
 
     return '\n'.join(lines)
 
+class _HeadersList(urwid.WidgetWrap):
+    """ renders a pile of header values as key/value list """
+
+    def __init__(self, headerslist, key_attr, value_attr, gaps_attr=None):
+        """
+        :param headerslist: list of key/value pairs to display
+        :type headerslist: list of (str, str)
+        :param key_attr: theming attribute to use for keys
+        :type key_attr: urwid.AttrSpec
+        :param value_attr: theming attribute to use for values
+        :type value_attr: urwid.AttrSpec
+        :param gaps_attr: theming attribute to wrap lines in
+        :type gaps_attr: urwid.AttrSpec
+        """
+        self.headers = headerslist
+        self.key_attr = key_attr
+        self.value_attr = value_attr
+        pile = urwid.Pile(self._build_lines(headerslist))
+        if gaps_attr is None:
+            gaps_attr = key_attr
+        pile = urwid.AttrMap(pile, gaps_attr)
+        urwid.WidgetWrap.__init__(self, pile)
+
+    def __str__(self):
+        return str(self.headers)
+
+    def _build_lines(self, lines):
+        max_key_len = 1
+        headerlines = []
+        # calc max length of key-string
+        for key, value in lines:
+            if len(key) > max_key_len:
+                max_key_len = len(key)
+        for key, value in lines:
+            # todo : even/odd
+            keyw = ('fixed', max_key_len + 1,
+                    urwid.Text((self.key_attr, key)))
+            valuew = urwid.Text((self.value_attr, value))
+            line = urwid.Columns([keyw, valuew])
+            headerlines.append(line)
+        return headerlines
+
 class EnvelopeBuffer(Buffer):
     """message composition mode"""
 
@@ -115,7 +156,7 @@ class EnvelopeBuffer(Buffer):
             value_att = settings.get_theming_attribute('envelope',
                                                        'header_value')
             gaps_att = settings.get_theming_attribute('envelope', 'header')
-            self.header_wgt = HeadersList(lines, key_att, value_att, gaps_att)
+            self.header_wgt = _HeadersList(lines, key_att, value_att, gaps_att)
             displayed_widgets.append(self.header_wgt)
 
         # display attachments