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# ##### BEGIN GPL LICENSE BLOCK #####
#
# 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 2
# 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, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
# -----------------------------------------------------------------------------
# AppOverrideState
class AppOverrideState:
"""
Utility class to encapsulate overriding the application state
so that settings can be restored afterwards.
"""
__slots__ = (
# setup_classes
"_class_store",
# setup_ui_ignore
"_ui_ignore_store",
# setup_addons
"_addon_store",
)
# ---------
# Callbacks
#
# Set as None, to make it simple to check if they're being overridden.
# setup/teardown classes
class_ignore = None
# setup/teardown ui_ignore
ui_ignore_classes = None
ui_ignore_operator = None
ui_ignore_property = None
ui_ignore_menu = None
ui_ignore_label = None
addon_paths = None
addons = None
# End callbacks
def __init__(self):
self._class_store = None
self._addon_store = None
self._ui_ignore_store = None
def _setup_classes(self):
assert(self._class_store is None)
self._class_store = self.class_ignore()
from bpy.utils import unregister_class
for cls in self._class_store:
unregister_class(cls)
def _teardown_classes(self):
assert(self._class_store is not None)
from bpy.utils import register_class
for cls in self._class_store:
register_class(cls)
self._class_store = None
def _setup_ui_ignore(self):
import bl_app_override
self._ui_ignore_store = bl_app_override.ui_draw_filter_register(
ui_ignore_classes=(
None if self.ui_ignore_classes is None
else self.ui_ignore_classes()
),
ui_ignore_operator=self.ui_ignore_operator,
ui_ignore_property=self.ui_ignore_property,
ui_ignore_menu=self.ui_ignore_menu,
ui_ignore_label=self.ui_ignore_label,
)
def _teardown_ui_ignore(self):
import bl_app_override
bl_app_override.ui_draw_filter_unregister(
self._ui_ignore_store
)
self._ui_ignore_store = None
def _setup_addons(self):
import sys
sys_path = []
if self.addon_paths is not None:
for path in self.addon_paths():
if path not in sys.path:
sys.path.append(path)
import addon_utils
addons = []
if self.addons is not None:
addons.extend(self.addons())
for addon in addons:
addon_utils.enable(addon)
self._addon_store = {
"sys_path": sys_path,
"addons": addons,
}
def _teardown_addons(self):
import sys
sys_path = self._addon_store["sys_path"]
for path in sys_path:
# should always succeed, but if not it doesn't matter
# (someone else was changing the sys.path), ignore!
try:
sys.path.remove(path)
except:
pass
addons = self._addon_store["addons"]
import addon_utils
for addon in addons:
addon_utils.disable(addon)
self._addon_store.clear()
self._addon_store = None
def setup(self):
if self.class_ignore is not None:
self._setup_classes()
if any((self.addon_paths,
self.addons,
)):
self._setup_addons()
if any((self.ui_ignore_operator,
self.ui_ignore_property,
self.ui_ignore_menu,
self.ui_ignore_label,
)):
self._setup_ui_ignore()
def teardown(self):
if self._class_store is not None:
self._teardown_classes()
if self._addon_store is not None:
self._teardown_addons()
if self._ui_ignore_store is not None:
self._teardown_ui_ignore()
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