Refactor headline state parsing.

- Add separate function to parse states.
- Handle edge case when no `|` is used to split TODO and DONE states.
- Add typing to the states to future-proof for handling keyboard shortcuts and actions on state changes.

org_rw/org_rw.py

@@ -1768,16 +1768,16 @@ def parse_headline(hl, doc, parent) -> Headline:
     title = line
     is_done = is_todo = False
     for state in doc.todo_keywords or []:
-        if title.startswith(state + " "):
+        if title.startswith(state['name'] + " "):
             hl_state = state
-            title = title[len(state + " ") :]
+            title = title[len(state['name'] + " ") :]
             is_todo = True
             break
     else:
         for state in doc.done_keywords or []:
-            if title.startswith(state + " "):
+            if title.startswith(state['name'] + " "):
                 hl_state = state
-                title = title[len(state + " ") :]
+                title = title[len(state['name'] + " ") :]
                 is_done = True
                 break
 
@@ -1993,7 +1993,7 @@ class OrgDoc:
 
         state = ""
         if headline.state:
-            state = headline.state + " "
+            state = headline.state['name'] + " "
 
         raw_title = token_list_to_raw(headline.title.contents)
         tags_padding = ""