347 lines
17 KiB
Python
347 lines
17 KiB
Python
"""
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This module contains the functionality to replace nodes by other nodes
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in order to keep files from older Leenkx versions compatible with newer versions.
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Nodes can define custom update procedures which describe how the replacement
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should look like.
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Original author: @niacdoial
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"""
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import os.path
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import time
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import traceback
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import typing
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from typing import Dict, List, Optional, Tuple
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import bpy.props
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import lnx.log as log
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import lnx.logicnode.lnx_nodes as lnx_nodes
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import lnx.logicnode.lnx_sockets
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import lnx.node_utils as node_utils
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if lnx.is_reload(__name__):
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log = lnx.reload_module(log)
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lnx_nodes = lnx.reload_module(lnx_nodes)
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lnx.logicnode.lnx_sockets = lnx.reload_module(lnx.logicnode.lnx_sockets)
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node_utils = lnx.reload_module(node_utils)
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else:
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lnx.enable_reload(__name__)
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# List of errors that occurred during the replacement
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# Format: (error identifier, node.bl_idname (or None), tree name, exception traceback (optional))
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replacement_errors: List[Tuple[str, Optional[str], str, Optional[str]]] = []
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class NodeReplacement:
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"""
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Represents a simple replacement rule, this can replace nodes of one type to nodes of a second type.
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However, it is fairly limited. For instance, it assumes there are no changes in the type of the inputs or outputs
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Second, it also assumes that node properties (especially EnumProperties) keep the same possible values.
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- from_node, from_node_version: the type of node to be removed, and its version number
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- to_node, to_node_version: the type of node which takes from_node's place, and its version number
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- *_socket_mapping: a map which defines how the sockets of the old node shall be connected to the new node
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{1: 2} means that anything connected to the socket with index 1 on the original node will be connected to the socket with index 2 on the new node
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- property_mapping: the mapping used to transfer the values of the old node's properties to the new node's properties.
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{"property0": "property1"} mean that the value of the new node's property1 should be the old node's property0's value.
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- input_defaults: a mapping used to give default values to the inputs which aren't overridden otherwise.
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- property_defaults: a mapping used to define the value of the new node's properties, when they aren't overridden otherwise.
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"""
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def __init__(self, from_node: str, from_node_version: int, to_node: str, to_node_version: int,
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in_socket_mapping: Dict[int, int], out_socket_mapping: Dict[int, int], property_mapping: Optional[Dict[str, str]] = None,
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input_defaults: Optional[Dict[int, any]] = None, property_defaults: Optional[Dict[str, any]] = None):
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self.from_node = from_node
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self.to_node = to_node
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self.from_node_version = from_node_version
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self.to_node_version = to_node_version
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self.in_socket_mapping = in_socket_mapping
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self.out_socket_mapping = out_socket_mapping
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self.property_mapping = {} if property_mapping is None else property_mapping
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self.input_defaults = {} if input_defaults is None else input_defaults
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self.property_defaults = {} if property_defaults is None else property_defaults
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@classmethod
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def Identity(cls, node: 'LnxLogicTreeNode'):
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"""Returns a NodeReplacement that does nothing, while operating on a given node.
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WARNING: it assumes that all node properties have names that start with "property"
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"""
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in_socks = {i: i for i in range(len(node.inputs))}
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out_socks = {i: i for i in range(len(node.outputs))}
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# Find all properties for this node
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props = {}
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possible_properties = []
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for attrname in dir(node):
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# We assume that property names start with 'property'
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if attrname.startswith('property'):
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possible_properties.append(attrname)
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for attrname in possible_properties:
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# Search in type annotations
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if attrname not in node.__annotations__:
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continue
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# Properties must be annotated with '_PropertyDeferred', see
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# https://developer.blender.org/rB37e6a1995ac7eeabd5b6a56621ad5a850dae4149
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# and https://developer.blender.org/rBc44c611c6d8c6ae071b48efb5fc07168f18cd17e
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if not isinstance(node.__annotations__[attrname], bpy.props._PropertyDeferred):
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continue
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props[attrname] = attrname
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return NodeReplacement(
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node.bl_idname, node.lnx_version, node.bl_idname, type(node).lnx_version,
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in_socket_mapping=in_socks, out_socket_mapping=out_socks,
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property_mapping=props
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)
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def chain_with(self, other):
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"""Modify the current NodeReplacement by "adding" a second replacement after it"""
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if self.to_node != other.from_node or self.to_node_version != other.from_node_version:
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raise TypeError('the given NodeReplacement-s could not be chained')
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self.to_node = other.to_node
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self.to_node_version = other.to_node_version
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for i1, i2 in self.in_socket_mapping.items():
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i3 = other.in_socket_mapping[i2]
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self.in_socket_mapping[i1] = i3
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for i1, i2 in self.out_socket_mapping.items():
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i3 = other.out_socket_mapping[i2]
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self.out_socket_mapping[i1] = i3
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for p1, p2 in self.property_mapping.items():
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p3 = other.property_mapping[p2]
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self.property_mapping[p1] = p3
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old_input_defaults = self.input_defaults
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self.input_defaults = other.input_defaults.copy()
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for i, x in old_input_defaults.items():
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self.input_defaults[ other.in_socket_mapping[i] ] = x
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old_property_defaults = self.property_defaults
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self.property_defaults = other.property_defaults.copy()
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for p, x in old_property_defaults.items():
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self.property_defaults[ other.property_mapping[p] ] = x
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@staticmethod
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def replace_input_socket(tree: bpy.types.NodeTree, socket_src: bpy.types.NodeSocket, socket_dst: bpy.types.NodeSocket):
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if socket_src.is_linked:
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for link in socket_src.links:
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tree.links.new(link.from_socket, socket_dst)
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else:
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node_utils.set_socket_default(socket_dst, node_utils.get_socket_default(socket_src))
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@staticmethod
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def replace_output_socket(tree: bpy.types.NodeTree, socket_src: bpy.types.NodeSocket, socket_dst: bpy.types.NodeSocket):
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if socket_src.is_linked:
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for link in socket_src.links:
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tree.links.new(socket_dst, link.to_socket)
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else:
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node_utils.set_socket_default(socket_dst, node_utils.get_socket_default(socket_src))
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def replace(tree: bpy.types.NodeTree, node: 'LnxLogicTreeNode'):
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"""Replaces the given node with its replacement."""
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# the node can either return a NodeReplacement object (for simple replacements)
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# or a brand new node, for more complex stuff.
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response = node.get_replacement_node(tree)
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if isinstance(response, lnx_nodes.LnxLogicTreeNode):
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newnode = response
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# some misc. properties
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node_utils.copy_basic_node_props(from_node=node, to_node=newnode)
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elif isinstance(response, list): # a list of nodes:
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for newnode in response:
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node_utils.copy_basic_node_props(from_node=node, to_node=newnode)
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elif isinstance(response, NodeReplacement):
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replacement = response
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# if the returned object is a NodeReplacement, check that it corresponds to the node (also, create the new node)
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if node.bl_idname != replacement.from_node or node.lnx_version != replacement.from_node_version:
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raise LookupError("The provided NodeReplacement doesn't seem to correspond to the node needing replacement")
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# Create the replacement node
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newnode = tree.nodes.new(response.to_node)
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if newnode.lnx_version != replacement.to_node_version:
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tree.nodes.remove(newnode)
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raise LookupError("The provided NodeReplacement doesn't seem to correspond to the node needing replacement")
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# some misc. properties
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node_utils.copy_basic_node_props(from_node=node, to_node=newnode)
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# now, use the `replacement` to hook up the new node correctly
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# start by applying defaults
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for prop_name, prop_value in replacement.property_defaults.items():
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setattr(newnode, prop_name, prop_value)
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for input_id, input_value in replacement.input_defaults.items():
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input_socket = newnode.inputs[input_id]
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node_utils.set_socket_default(input_socket, input_value)
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# map properties
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for src_prop_name, dest_prop_name in replacement.property_mapping.items():
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setattr(newnode, dest_prop_name, getattr(node, src_prop_name))
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# map inputs
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for src_socket_id, dest_socket_id in replacement.in_socket_mapping.items():
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src_socket = node.inputs[src_socket_id]
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dest_socket = newnode.inputs[dest_socket_id]
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NodeReplacement.replace_input_socket(tree, src_socket, dest_socket)
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# map outputs
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for src_socket_id, dest_socket_id in replacement.out_socket_mapping.items():
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src_socket = node.outputs[src_socket_id]
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dest_socket = newnode.outputs[dest_socket_id]
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NodeReplacement.replace_output_socket(tree, src_socket, dest_socket)
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else:
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print(response)
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tree.nodes.remove(node)
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def replace_all():
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"""Iterate through all logic node trees in the file and check for node updates/replacements to execute."""
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global replacement_errors
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replacement_errors.clear()
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for tree in bpy.data.node_groups:
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if tree.bl_idname == "LnxLogicTreeType" or tree.bl_idname == 'LnxGroupTree':
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# Use list() to make a "static" copy. It's possible to iterate over it because nodes which get removed
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# from the tree leave python objects in the list
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for node in list(tree.nodes):
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# Blender nodes (layout)
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if not isinstance(node, lnx_nodes.LnxLogicTreeNode):
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continue
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# That node has been removed from the tree without replace() being called on it somehow
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elif node.type == '':
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continue
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# Node type deleted. That's unusual. Or it has been replaced for a looong time
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elif not node.is_registered_node_type():
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replacement_errors.append(('unregistered', None, tree.name, None))
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# Invalid version number
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elif not isinstance(type(node).lnx_version, int):
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replacement_errors.append(('bad version', node.bl_idname, tree.name, None))
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# Actual replacement
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elif node.lnx_version < type(node).lnx_version:
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try:
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replace(tree, node)
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except LookupError as err:
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replacement_errors.append(('update failed', node.bl_idname, tree.name, traceback.format_exc()))
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except Exception as err:
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replacement_errors.append(('misc.', node.bl_idname, tree.name, traceback.format_exc()))
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# Node version is newer than supported by the class
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elif node.lnx_version > type(node).lnx_version:
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replacement_errors.append(('future version', node.bl_idname, tree.name, None))
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# If possible, make a popup about the errors and write an error report into the .blend file's folder
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if len(replacement_errors) > 0:
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basedir = os.path.dirname(bpy.data.filepath)
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reportfile = os.path.join(
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basedir, 'node_update_failure.{:s}.txt'.format(
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time.strftime("%Y-%m-%dT%H-%M-%S%z")
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)
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)
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with open(reportfile, 'w') as reportf:
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for error_type, node_class, tree_name, tb in replacement_errors:
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if error_type == 'unregistered':
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print(f"A node whose class doesn't exist was found in node tree \"{tree_name}\"", file=reportf)
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elif error_type == 'update failed':
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print(f"A node of type {node_class} in tree \"{tree_name}\" failed to be updated, "
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f"because there is no (longer?) an update routine for this version of the node. Original exception:"
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"\n" + tb + "\n", file=reportf)
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elif error_type == 'future version':
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print(f"A node of type {node_class} in tree \"{tree_name}\" seemingly comes from a future version of leenkx. "
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f"Please check whether your version of leenkx is up to date", file=reportf)
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elif error_type == 'bad version':
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print(f"A node of type {node_class} in tree \"{tree_name}\" doesn't have version information attached to it. "
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f"If so, please check that the nodes in the file are compatible with the in-code node classes. "
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f"If this nodes comes from an add-on, please check that it is compatible with this version of leenkx.", file=reportf)
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elif error_type == 'misc.':
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print(f"A node of type {node_class} in tree \"{tree_name}\" failed to be updated, "
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f"because the node's update procedure itself failed. Original exception:"
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"\n" + tb + "\n", file=reportf)
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else:
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print(f"Whoops, we don't know what this error type (\"{error_type}\") means. You might want to report a bug here. "
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f"All we know is that it comes form a node of class {node_class} in the node tree called \"{tree_name}\".", file=reportf)
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log.error(f'There were errors in the node update procedure, a detailed report has been written to {reportfile}')
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bpy.ops.lnx.show_node_update_errors()
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def node_compat_sdk2108():
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"""SDK 21.08 broke compatibility with older nodes as nodes now use
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custom sockets even for Blender's default data types and custom
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property "constructors". This allows to listen for events for the
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live patch system.
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In order to update older nodes this routine is used. It creates a
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full copy of the nodes and replaces all properties and sockets with
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their new equivalents.
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"""
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for tree in bpy.data.node_groups:
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if tree.bl_idname == "LnxLogicTreeType" or tree.bl_idname == 'LnxGroupTree':
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for node in list(tree.nodes):
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# Don't raise exceptions for invalid unregistered nodes, this
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# function didn't cause the registration problem if there is one
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if not node.__class__.is_registered_node_type():
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continue
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if node.type in ('FRAME', 'REROUTE'):
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continue
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newnode = tree.nodes.new(node.__class__.bl_idname)
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node_utils.copy_basic_node_props(from_node=node, to_node=newnode)
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# Also copy the node's version number to _not_ prevent actual node
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# replacement after this step
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newnode.lnx_version = node.lnx_version
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# First replace all properties
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for prop_name, prop in typing.get_type_hints(node.__class__, {}, {}).items():
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if isinstance(prop, bpy.props._PropertyDeferred):
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if hasattr(node, prop_name) and hasattr(newnode, prop_name):
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setattr(newnode, prop_name, getattr(node, prop_name))
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# Replace sockets with new socket types
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socket_replacements = {
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'NodeSocketBool': 'LnxBoolSocket',
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'NodeSocketColor': 'LnxColorSocket',
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'NodeSocketFloat': 'LnxFloatSocket',
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'NodeSocketInt': 'LnxIntSocket',
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'NodeSocketShader': 'LnxDynamicSocket',
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'NodeSocketString': 'LnxStringSocket',
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'NodeSocketVector': 'LnxVectorSocket'
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}
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# Recreate all sockets
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newnode.inputs.clear()
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for inp in node.inputs:
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inp_idname = inp.bl_idname
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inp_idname = socket_replacements.get(inp_idname, inp_idname)
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newinp = newnode.inputs.new(inp_idname, inp.name, identifier=inp.identifier)
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NodeReplacement.replace_input_socket(tree, inp, newinp)
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newnode.outputs.clear()
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for out in node.outputs:
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out_idname = out.bl_idname
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out_idname = socket_replacements.get(out_idname, out_idname)
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newout = newnode.outputs.new(out_idname, out.name, identifier=out.identifier)
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NodeReplacement.replace_output_socket(tree, out, newout)
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tree.nodes.remove(node)
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