thread: implement tree decorations

They were temporarily removed in the previous commit.
Still not working:
- theming for the decorations
- drawing the connector line properly for expanded messages
- configurable indentation

1 files changed, 4 insertions, 3 deletions

diff --git a/alot/db/thread.py b/alot/db/thread.py
index a76997f8..3dc90325 100644
--- a/alot/db/thread.py
+++ b/alot/db/thread.py
@@ -107,22 +107,23 @@ class Thread:
         msg_tree = []
         msg_list = []
 
-        def thread_tree_walk(nm_msg, depth):
+        def thread_tree_walk(nm_msg, depth, parent):
             msg = Message(self._dbman, self, nm_msg, depth)
 
             msg_list.append(msg)
 
             replies = []
             for m in nm_msg.get_replies():
-                replies.append(thread_tree_walk(m, depth + 1))
+                replies.append(thread_tree_walk(m, depth + 1, msg))
 
             msg.replies  = replies
+            msg.parent   = parent
             msgs[msg.id] = msg
 
             return msg
 
         for m in nm_thread.get_toplevel_messages():
-            msg_tree.append(thread_tree_walk(m, 0))
+            msg_tree.append(thread_tree_walk(m, 0, None))
 
         return msgs, msg_tree, msg_list