mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-11-28 21:54:10 +01:00
131 lines
4.2 KiB
Python
131 lines
4.2 KiB
Python
"""
|
|
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 <https://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>
|
|
"""
|
|
from ctypes import c_char_p
|
|
from .globals import (
|
|
nmlib,
|
|
NotmuchFilenamesP,
|
|
Python3StringMixIn,
|
|
)
|
|
from .errors import (
|
|
NullPointerError,
|
|
NotInitializedError,
|
|
)
|
|
|
|
|
|
class Filenames(Python3StringMixIn):
|
|
"""Represents a list of filenames as returned by notmuch
|
|
|
|
Objects of this class implement the iterator protocol.
|
|
|
|
.. note::
|
|
|
|
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:`NotInitializedError`. 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::
|
|
|
|
list_of_names = list(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.argtypes = [NotmuchFilenamesP]
|
|
_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 publicly 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:`NullPointerError`
|
|
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 not files_p:
|
|
raise NullPointerError()
|
|
|
|
self._files_p = files_p
|
|
#save reference to parent object so we keep it alive
|
|
self._parent = parent
|
|
|
|
def __iter__(self):
|
|
""" Make Filenames an iterator """
|
|
return self
|
|
|
|
_valid = nmlib.notmuch_filenames_valid
|
|
_valid.argtypes = [NotmuchFilenamesP]
|
|
_valid.restype = bool
|
|
|
|
_move_to_next = nmlib.notmuch_filenames_move_to_next
|
|
_move_to_next.argtypes = [NotmuchFilenamesP]
|
|
_move_to_next.restype = None
|
|
|
|
def __next__(self):
|
|
if not self._files_p:
|
|
raise NotInitializedError()
|
|
|
|
if not self._valid(self._files_p):
|
|
self._files_p = None
|
|
raise StopIteration
|
|
|
|
file_ = Filenames._get(self._files_p)
|
|
self._move_to_next(self._files_p)
|
|
return file_.decode('utf-8', 'ignore')
|
|
next = __next__ # python2.x iterator protocol compatibility
|
|
|
|
def __unicode__(self):
|
|
"""Represent Filenames() as newline-separated list of full paths
|
|
|
|
.. note::
|
|
|
|
This method exhausts the iterator object, so you will not be able to
|
|
iterate over them again.
|
|
"""
|
|
return "\n".join(self)
|
|
|
|
_destroy = nmlib.notmuch_filenames_destroy
|
|
_destroy.argtypes = [NotmuchFilenamesP]
|
|
_destroy.restype = None
|
|
|
|
def __del__(self):
|
|
"""Close and free the notmuch filenames"""
|
|
if self._files_p:
|
|
self._destroy(self._files_p)
|