--- /dev/null
+"""
+This file is part of notmuch.
+
+Notmuch is free software: you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation, either version 3 of the License, or (at your
+option) any later version.
+
+Notmuch is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+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
+
+#------------------------------------------------------------------------------
+class Filenames(object):
+ """Represents a list of filenames as returned by notmuch
+
+ This object contains the Filenames iterator. The main function is as_generator() which will return a generator so we can do a Filenamesth an iterator over a list of notmuch filenames. 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 name in filenames: print name
+
+ as well as::
+
+ number_of_names = len(names)
+
+ and even a simple::
+
+ #str() iterates over all tags to construct a space separated list
+ print(str(filenames))
+
+ will "exhaust" the Filenames. However, you can use
+ :meth:`Message.get_filenames` repeatedly to get fresh Filenames
+ objects to perform various actions on filenames.
+ """
+
+ #notmuch_filenames_get
+ _get = nmlib.notmuch_filenames_get
+ _get.restype = c_char_p
+
+ def __init__(self, files_p, parent):
+ """
+ :param files_p: A pointer to an underlying *notmuch_tags_t*
+ structure. These are not publically exposed, so a user
+ will almost never instantiate a :class:`Tags` object
+ herself. They are usually handed back as a result,
+ e.g. in :meth:`Database.get_all_tags`. *tags_p* must be
+ valid, we will raise an :exc:`NotmuchError`
+ (STATUS.NULL_POINTER) if it is `None`.
+ :type files_p: :class:`ctypes.c_void_p`
+ :param parent: The parent object (ie :class:`Message` these
+ filenames are derived from, and saves a
+ reference to it, so we can automatically delete the db object
+ once all derived objects are dead.
+ """
+ if files_p is None:
+ NotmuchError(STATUS.NULL_POINTER)
+
+ self._files = files_p
+ #save reference to parent object so we keep it alive
+ self._parent = parent
+
+ def as_generator(self):
+ """Return generator of Filenames
+
+ This is the main function that will usually be used by the
+ user."""
+ if self._files is None:
+ raise NotmuchError(STATUS.NOT_INITIALIZED)
+
+ if not nmlib.notmuch_filenames_valid(self._files):
+ self._files = None
+ return
+
+ file = Filenames._get (self._files)
+ nmlib.notmuch_filenames_move_to_next(self._files)
+ yield file
+
+ def __str__(self):
+ """Represent Filenames() as newline-separated list of full paths
+
+ .. note:: As this iterates over the filenames, 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. However, you can use
+ :meth:`Message.get_filenames` repeatedly to perform
+ various actions on filenames.
+ """
+ return "\n".join(self)
+
+ def __del__(self):
+ """Close and free the notmuch filenames"""
+ if self._files is not None:
+ nmlib.notmuch_filenames_destroy (self._files)
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