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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
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