Campbell Barton
3ca76ae0e8
It can be assumed that all scripts comply with basic pep8 formatting regarding white-space, indentation etc. Also remove note in best practices page & update `tests/python/pep8.py`. If we want to exclude some scripts from make format, this can be done by adding them to `ignore_files` in: source/tools/utils_maintenance/autopep8_format_paths.py Or using `# nopep8` for to ignore for individual lines. Ref T98554
75 lines
2.1 KiB
Python
75 lines
2.1 KiB
Python
# 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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