def pre_save_datablock(proxy: DatablockProxy, target: T.ID,
context: Context) -> T.ID:
"""Process attributes that must be saved first and return a possibly updated reference to the target"""
# WARNING this is called from save() and from apply()
# When called from save, the proxy has all the synchronized properties
# WHen called from apply, the proxy only contains the updated properties
if target.library:
return target
# animation_data is handled in StructProxy (parent class of DatablockProxy)
if isinstance(target, T.Mesh):
from mixer.blender_data.mesh_proxy import MeshProxy
assert isinstance(proxy, MeshProxy)
if proxy.requires_clear_geometry(target):
target.clear_geometry()
elif isinstance(target, T.Material):
is_grease_pencil = proxy.data("is_grease_pencil")
# will be None for a DeltaUpdate that does not modify "is_grease_pencil"
if is_grease_pencil is not None:
# Seems to be write once as no depsgraph update is fired
if is_grease_pencil and not target.grease_pencil:
bpy.data.materials.create_gpencil_data(target)
elif not is_grease_pencil and target.grease_pencil:
bpy.data.materials.remove_gpencil_data(target)
elif isinstance(target, T.Scene):
from mixer.blender_data.misc_proxies import NonePtrProxy
sequence_editor = proxy.data("sequence_editor")
if sequence_editor is not None:
# NonePtrProxy or StructProxy
if not isinstance(sequence_editor,
NonePtrProxy) and target.sequence_editor is None:
target.sequence_editor_create()
elif isinstance(
sequence_editor,
NonePtrProxy) and target.sequence_editor is not None:
target.sequence_editor_clear()
elif isinstance(target, _morphable_types):
# required first to have access to new datablock attributes
type_ = proxy.data("type")
if type_ is not None and type_ != target.type:
target.type = type_
# must reload the reference
target = target.type_recast()
uuid = proxy.mixer_uuid
context.proxy_state.remove_datablock(uuid)
context.proxy_state.add_datablock(uuid, target)
elif isinstance(target, T.Action):
groups = proxy.data("groups")
if groups:
groups.save(target.groups, target, "groups", context)
return target
def pre_save_datablock(proxy: DatablockProxy, target: T.ID,
context: Context) -> T.ID:
"""Process attributes that must be saved first and return a possibly updated reference to the target"""
# WARNING this is called from save() and from apply()
# When called from save, the proxy has all the synchronized properties
# WHen called from apply, the proxy only contains the updated properties
if isinstance(target, T.Mesh) and proxy_requires_clear_geometry(
proxy, target):
target.clear_geometry()
elif isinstance(target, T.Material):
use_nodes = proxy.data("use_nodes")
if use_nodes:
target.use_nodes = True
is_grease_pencil = proxy.data("is_grease_pencil")
# will be None for a DeltaUpdate that does not modify "is_grease_pencil"
if is_grease_pencil is not None:
# Seems to be write once as no depsgraph update is fired
if is_grease_pencil and not target.grease_pencil:
bpy.data.materials.create_gpencil_data(target)
elif not is_grease_pencil and target.grease_pencil:
bpy.data.materials.remove_gpencil_data(target)
elif isinstance(target, T.Scene):
from mixer.blender_data.misc_proxies import NonePtrProxy
# Set 'use_node' to True first is the only way I know to be able to set the 'node_tree' attribute
use_nodes = proxy.data("use_nodes")
if use_nodes:
target.use_nodes = True
sequence_editor = proxy.data("sequence_editor")
if sequence_editor is not None:
# NonePtrProxy or StructProxy
if not isinstance(sequence_editor,
NonePtrProxy) and target.sequence_editor is None:
target.sequence_editor_create()
elif isinstance(
sequence_editor,
NonePtrProxy) and target.sequence_editor is not None:
target.sequence_editor_clear()
elif isinstance(target, T.Light):
# required first to have access to new light type attributes
light_type = proxy.data("type")
if light_type is not None and light_type != target.type:
target.type = light_type
# must reload the reference
target = proxy.target(context)
elif isinstance(target, T.World):
use_nodes = proxy.data("use_nodes")
if use_nodes:
target.use_nodes = True
return target