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+# Gimp-Python - allows the writing of Gimp plugins in Python.
+# Copyright (C) 1997 James Henstridge <james@daa.com.au>
+#
+# This program 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.
+#
+# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+
+# gimpshelf.py -- a simple module to help gimp modules written in Python
+# store persistent data.
+#
+# Copyright (C) 1997, James Henstridge
+#
+# The gimp module provides a basic method for storing information that persists
+# for a whole gimp session, but only allows for the storage of strings. This
+# is because other Python types usually have pointers to other Python objects,
+# making it difficult to work out what to save. This module gives an interface
+# to the gimp module's primitive interface, which resembles the shelve module.
+
+# use cPickle and cStringIO if available
+
+try:
+ import cPickle as pickle
+except ImportError:
+ import pickle
+
+try:
+ import cStringIO as StringIO
+except ImportError:
+ import StringIO
+
+import gimp
+
+import copy_reg
+
+def _image_id(obj):
+ return gimp._id2image, (obj.ID,)
+
+def _drawable_id(obj):
+ return gimp._id2drawable, (obj.ID,)
+
+def _display_id(obj):
+ return gimp._id2display, (obj.ID,)
+
+def _vectors_id(obj):
+ return gimp._id2vectors, (int(obj.ID),)
+
+copy_reg.pickle(gimp.Image, _image_id, gimp._id2image)
+copy_reg.pickle(gimp.Layer, _drawable_id, gimp._id2drawable)
+copy_reg.pickle(gimp.GroupLayer, _drawable_id, gimp._id2drawable)
+copy_reg.pickle(gimp.Channel, _drawable_id, gimp._id2drawable)
+copy_reg.pickle(gimp.Display, _display_id, gimp._id2display)
+copy_reg.pickle(gimp.Vectors, _vectors_id, gimp._id2vectors)
+
+del copy_reg, _image_id, _drawable_id, _display_id, _vectors_id
+
+class Gimpshelf:
+ def has_key(self, key):
+ try:
+ s = gimp.get_data(key)
+ return 1
+ except gimp.error:
+ return 0
+
+ def __getitem__(self, key):
+ try:
+ s = gimp.get_data(key)
+ except gimp.error:
+ raise KeyError, key
+
+ f = StringIO.StringIO(s)
+ return pickle.Unpickler(f).load()
+
+ def __setitem__(self, key, value):
+ f = StringIO.StringIO()
+ p = pickle.Pickler(f)
+ p.dump(value)
+ gimp.set_data(key, f.getvalue())
+
+ def __delitem__(self, key):
+ gimp.set_data(key, '')
+
+shelf = Gimpshelf()
+del Gimpshelf