e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
# SPDX-FileCopyrightText: 2021-2023 Blender Authors
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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__all__ = (
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"property_definition_from_data_path",
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"decompose_data_path",
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)
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class _TokenizeDataPath:
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"""
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Class to split up tokens of a data-path.
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Note that almost all access generates new objects with additional paths,
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with the exception of iteration which is the intended way to access the resulting data."""
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__slots__ = (
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"data_path",
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)
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def __init__(self, attrs):
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self.data_path = attrs
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def __getattr__(self, attr):
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return _TokenizeDataPath(self.data_path + ((".%s" % attr),))
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def __getitem__(self, key):
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return _TokenizeDataPath(self.data_path + (("[%r]" % (key,)),))
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def __call__(self, *args, **kw):
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value_str = ", ".join([
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val for val in (
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", ".join(repr(value) for value in args),
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", ".join(["%s=%r" % (key, value) for key, value in kw.items()]),
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) if val])
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return _TokenizeDataPath(self.data_path + ('(%s)' % value_str, ))
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def __iter__(self):
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return iter(self.data_path)
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def decompose_data_path(data_path):
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"""
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Return the components of a data path split into a list.
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"""
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ns = {"base": _TokenizeDataPath(())}
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return list(eval("base" + data_path, ns, ns))
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def property_definition_from_data_path(base, data_path):
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"""
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Return an RNA property definition from an object and a data path.
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In Blender this is often used with ``context`` as the base and a
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path that it references, for example ``.space_data.lock_camera``.
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"""
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data = decompose_data_path(data_path)
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while data and (not data[-1].startswith(".")):
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data.pop()
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if (not data) or (not data[-1].startswith(".")) or (len(data) < 2):
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return None
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data_path_head = "".join(data[:-1])
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data_path_tail = data[-1]
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value_head = eval("base" + data_path_head)
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value_head_rna = getattr(value_head, "bl_rna", None)
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if value_head_rna is None:
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return None
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value_tail = value_head.bl_rna.properties.get(data_path_tail[1:])
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if not value_tail:
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return None
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return value_tail
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