Campbell Barton
c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
# <pep8 compliant>
|
|
|
|
__all__ = (
|
|
"property_definition_from_data_path",
|
|
"decompose_data_path",
|
|
)
|
|
|
|
|
|
class _TokenizeDataPath:
|
|
"""
|
|
Class to split up tokens of a data-path.
|
|
|
|
Note that almost all access generates new objects with additional paths,
|
|
with the exception of iteration which is the intended way to access the resulting data."""
|
|
__slots__ = (
|
|
"data_path",
|
|
)
|
|
|
|
def __init__(self, attrs):
|
|
self.data_path = attrs
|
|
|
|
def __getattr__(self, attr):
|
|
return _TokenizeDataPath(self.data_path + ((".%s" % attr),))
|
|
|
|
def __getitem__(self, key):
|
|
return _TokenizeDataPath(self.data_path + (("[%r]" % (key,)),))
|
|
|
|
def __call__(self, *args, **kw):
|
|
value_str = ", ".join([
|
|
val for val in (
|
|
", ".join(repr(value) for value in args),
|
|
", ".join(["%s=%r" % (key, value) for key, value in kw.items()]),
|
|
) if val])
|
|
return _TokenizeDataPath(self.data_path + ('(%s)' % value_str, ))
|
|
|
|
def __iter__(self):
|
|
return iter(self.data_path)
|
|
|
|
|
|
def decompose_data_path(data_path):
|
|
"""
|
|
Return the components of a data path split into a list.
|
|
"""
|
|
ns = {"base": _TokenizeDataPath(())}
|
|
return list(eval("base" + data_path, ns, ns))
|
|
|
|
|
|
def property_definition_from_data_path(base, data_path):
|
|
"""
|
|
Return an RNA property definition from an object and a data path.
|
|
|
|
In Blender this is often used with ``context`` as the base and a
|
|
path that it references, for example ``.space_data.lock_camera``.
|
|
"""
|
|
data = decompose_data_path(data_path)
|
|
while data and (not data[-1].startswith(".")):
|
|
data.pop()
|
|
|
|
if (not data) or (not data[-1].startswith(".")) or (len(data) < 2):
|
|
return None
|
|
|
|
data_path_head = "".join(data[:-1])
|
|
data_path_tail = data[-1]
|
|
|
|
value_head = eval("base" + data_path_head)
|
|
value_head_rna = getattr(value_head, "bl_rna", None)
|
|
if value_head_rna is None:
|
|
return None
|
|
|
|
value_tail = value_head.bl_rna.properties.get(data_path_tail[1:])
|
|
if not value_tail:
|
|
return None
|
|
|
|
return value_tail
|