X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=bindings%2Fpython%2Fnotmuch%2Ftag.py;h=f3a3d27e501dbfb5886ef4031f99490ff1a36968;hp=e123b0f317059f4429125482a3941f325af9d4f5;hb=3434d194026ff65217d9342ffe511f67fd71e79f;hpb=aeecafa694e8296411ad21cee1b7de094600babf

diff --git a/bindings/python/notmuch/tag.py b/bindings/python/notmuch/tag.py
index e123b0f3..f3a3d27e 100644
--- a/bindings/python/notmuch/tag.py
+++ b/bindings/python/notmuch/tag.py
@@ -17,21 +17,23 @@ along with notmuch.  If not, see <http://www.gnu.org/licenses/>.
 Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
 """
 from ctypes import c_char_p
-from notmuch.globals import nmlib, STATUS, NotmuchError
+from notmuch.globals import nmlib, STATUS, NotmuchError, NotmuchTagsP
+
 
-#------------------------------------------------------------------------------
 class Tags(object):
     """Represents a list of notmuch tags
 
-    This object provides an iterator over a list of notmuch tags. Do
-    note that the underlying library only provides a one-time iterator
-    (it cannot reset the iterator to the start). Thus iterating over
-    the function will "exhaust" the list of tags, and a subsequent
+    This object provides an iterator over a list of notmuch tags (which
+    are unicode instances).
+
+    Do note that the underlying library only provides a one-time
+    iterator (it cannot reset the iterator to the start). Thus iterating
+    over the function will "exhaust" the list of tags, and a subsequent
     iteration attempt will raise a :exc:`NotmuchError`
     STATUS.NOT_INITIALIZED. Also note, that any function that uses
     iteration (nearly all) will also exhaust the tags. So both::
 
-      for tag in tags: print tag 
+      for tag in tags: print tag
 
     as well as::
 
@@ -48,6 +50,7 @@ class Tags(object):
 
     #notmuch_tags_get
     _get = nmlib.notmuch_tags_get
+    _get.argtypes = [NotmuchTagsP]
     _get.restype = c_char_p
 
     def __init__(self, tags_p, parent=None):
@@ -60,7 +63,7 @@ class Tags(object):
              valid, we will raise an :exc:`NotmuchError`
              (STATUS.NULL_POINTER) if it is `None`.
         :type tags_p: :class:`ctypes.c_void_p`
-        :param parent: The parent object (ie :class:`Database` or 
+        :param parent: The parent object (ie :class:`Database` or
              :class:`Message` these tags are derived from, and saves a
              reference to it, so we can automatically delete the db object
              once all derived objects are dead.
@@ -68,26 +71,32 @@ class Tags(object):
                cache the tags in the Python object(?)
         """
         if tags_p is None:
-            NotmuchError(STATUS.NULL_POINTER)
+            raise NotmuchError(STATUS.NULL_POINTER)
 
         self._tags = tags_p
         #save reference to parent object so we keep it alive
         self._parent = parent
-    
+
     def __iter__(self):
         """ Make Tags an iterator """
         return self
 
+    _valid = nmlib.notmuch_tags_valid
+    _valid.argtypes = [NotmuchTagsP]
+    _valid.restype = bool
+
+    _move_to_next = nmlib.notmuch_tags_move_to_next
+    _move_to_next.argtypes = [NotmuchTagsP]
+    _move_to_next.restype = None
+
     def next(self):
         if self._tags is None:
             raise NotmuchError(STATUS.NOT_INITIALIZED)
-        # No need to call nmlib.notmuch_tags_valid(self._tags);
-        # Tags._get safely returns None, if there is no more valid tag.
-        tag = Tags._get (self._tags)
-        if tag is None:
+        if not self._valid(self._tags):
             self._tags = None
             raise StopIteration
-        nmlib.notmuch_tags_move_to_next(self._tags)
+        tag = Tags._get(self._tags).decode('UTF-8')
+        self._move_to_next(self._tags)
         return tag
 
     def __nonzero__(self):
@@ -99,26 +108,7 @@ class Tags(object):
 
         :returns: True if the Tags() iterator has at least one more Tag
             left."""
-        return nmlib.notmuch_tags_valid(self._tags) > 0
-
-    def __len__(self):
-        """len(:class:`Tags`) returns the number of contained tags
-
-        .. note:: As this iterates over the tags, we will not be able
-               to iterate over them again (as in retrieve them)! If
-               the tags have been exhausted already, this will raise a
-               :exc:`NotmuchError` STATUS.NOT_INITIALIZED on
-               subsequent attempts.
-        """
-        if self._tags is None:
-            raise NotmuchError(STATUS.NOT_INITIALIZED)
-
-        i=0
-        while nmlib.notmuch_tags_valid(self._msgs):
-            nmlib.notmuch_tags_move_to_next(self._msgs)
-            i += 1
-        self._tags = None
-        return i
+        return self._valid(self._tags) > 0
 
     def __str__(self):
         """The str() representation of Tags() is a space separated list of tags
@@ -131,7 +121,11 @@ class Tags(object):
         """
         return " ".join(self)
 
+    _destroy = nmlib.notmuch_tags_destroy
+    _destroy.argtypes = [NotmuchTagsP]
+    _destroy.restype = None
+
     def __del__(self):
         """Close and free the notmuch tags"""
         if self._tags is not None:
-            nmlib.notmuch_tags_destroy (self._tags)
+            self._destroy(self._tags)