5088b0154d
The "bl_i18n_utils" module has been excluded I'm not sure how best to run it with reasonable code coverage.
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}".format(attr)),))
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def __getitem__(self, key):
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return _TokenizeDataPath(self.data_path + (("[{!r}]".format(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}".format(key, value) for key, value in kw.items()]),
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) if val])
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return _TokenizeDataPath(self.data_path + ('({:s})'.format(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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