Fix #2049 (get the current completed argument)

A command argument can now be completed even if it isn’t the last
one in the input.

- Add a new method Input.new_completion
    Almost like the old auto_completion method, except taht it takes
    another argument: argument_position, which is the argument to be
    completed.
- Methods using the old completion method still work
- All completion methods in poezio now use the new one if necessary
- Further details can be found in the docstring of new_completion

1 files changed, 12 insertions, 1 deletions

diff --git a/src/decorators.py b/src/decorators.py
index ab987701..3cb967b3 100644
--- a/src/decorators.py
+++ b/src/decorators.py
@@ -1,7 +1,9 @@
 """
-Module containing the decorators
+Module containing various decorators
 """
 
+from functools import partial
+
 class RefreshWrapper(object):
     def __init__(self):
         self.core = None
@@ -40,5 +42,14 @@ class RefreshWrapper(object):
             return ret
         return wrap
 
+def __completion(quoted, func):
+    class Completion(object):
+        quoted = quoted
+        def __new__(cls, *args, **kwargs):
+            return func(*args, **kwargs)
+    return Completion
+
 
+completion_quotes = partial(__completion, True)
+completion_raw = partial(__completion, False)
 refresh_wrapper = RefreshWrapper()