168 lines
5.9 KiB
Python
168 lines
5.9 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2000-2006 Donald N. Allingham
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# Copyright (C) 2010 Michiel D. Nauta
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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"""
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MediaBase class for GRAMPS.
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"""
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#-------------------------------------------------------------------------
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#
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# GRAMPS modules
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#
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#-------------------------------------------------------------------------
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from gen.lib.mediaref import MediaRef
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from gen.lib.const import IDENTICAL, EQUAL, DIFFERENT
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#-------------------------------------------------------------------------
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#
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# MediaBase class
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#
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#-------------------------------------------------------------------------
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class MediaBase(object):
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"""
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Base class for storing media references.
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"""
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def __init__(self, source=None):
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"""
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Create a new MediaBase, copying from source if not None.
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:param source: Object used to initialize the new object
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:type source: MediaBase
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"""
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self.media_list = map(MediaRef, source.media_list) if source else []
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def serialize(self):
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"""
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Convert the object to a serialized tuple of data.
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"""
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return [mref.serialize() for mref in self.media_list]
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def unserialize(self, data):
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"""
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Convert a serialized tuple of data to an object.
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"""
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self.media_list = [MediaRef().unserialize(item) for item in data]
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def add_media_reference(self, media_ref):
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"""
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Add a :class:`~gen.lib.mediaref.MediaRef` instance to the object's media list.
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:param media_ref: :class:`~gen.lib.mediaref.MediaRef` instance to be added to the object's
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media list.
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:type media_ref: :class:`~gen.lib.mediaref.MediaRef`
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"""
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self.media_list.append(media_ref)
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def get_media_list(self):
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"""
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Return the list of :class:`~gen.lib.mediaref.MediaRef` instances associated with the object.
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:returns: list of :class:`~gen.lib.mediaref.MediaRef` instances associated with the object
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:rtype: list
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"""
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return self.media_list
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def set_media_list(self, media_ref_list):
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"""
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Set the list of :class:`~gen.lib.mediaref.MediaRef` instances associated with the object.
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It replaces the previous list.
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:param media_ref_list: list of :class:`~gen.lib.mediaref.MediaRef` instances to be assigned
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to the object.
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:type media_ref_list: list
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"""
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self.media_list = media_ref_list
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def _merge_media_list(self, acquisition):
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"""
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Merge the list of media references from acquisition with our own.
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:param acquisition: the media list of this object will be merged with
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the current media reference list.
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:rtype acquisition: MediaBase
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"""
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media_list = self.media_list[:]
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for addendum in acquisition.get_media_list():
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for obj in media_list:
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equi = obj.is_equivalent(addendum)
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if equi == IDENTICAL:
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break
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elif equi == EQUAL:
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obj.merge(addendum)
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break
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else:
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self.media_list.append(addendum)
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def has_media_reference(self, obj_handle) :
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"""
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Return True if the object or any of it's child objects has reference
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to this media object handle.
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:param obj_handle: The media handle to be checked.
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:type obj_handle: str
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:returns: Returns whether the object or any of it's child objects has
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reference to this media handle.
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:rtype: bool
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"""
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return obj_handle in [media_ref.ref for media_ref in self.media_list]
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def remove_media_references(self, obj_handle_list):
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"""
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Remove references to all media handles in the list.
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:param obj_handle_list: The list of media handles to be removed.
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:type obj_handle_list: list
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"""
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new_media_list = [media_ref for media_ref in self.media_list
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if media_ref.ref not in obj_handle_list]
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self.media_list = new_media_list
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def replace_media_references(self, old_handle, new_handle):
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"""
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Replace all references to old media handle with the new handle and
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merge equivalent entries.
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:param old_handle: The media handle to be replaced.
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:type old_handle: str
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:param new_handle: The media handle to replace the old one with.
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:type new_handle: str
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"""
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refs_list = [ media_ref.ref for media_ref in self.media_list ]
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new_ref = None
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if new_handle in refs_list:
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new_ref = self.media_list[refs_list.index(new_handle)]
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n_replace = refs_list.count(old_handle)
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for ix_replace in xrange(n_replace):
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idx = refs_list.index(old_handle)
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self.media_list[idx].ref = new_handle
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refs_list[idx] = new_handle
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if new_ref:
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media_ref = self.media_list[idx]
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equi = new_ref.is_equivalent(media_ref)
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if equi != DIFFERENT:
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if equi == EQUAL:
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new_ref.merge(media_ref)
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self.media_list.pop(idx)
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refs_list.pop(idx)
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