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90 lines
3.4 KiB
90 lines
3.4 KiB
4 years ago
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"""
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pygments.lexers.usd
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~~~~~~~~~~~~~~~~~~~
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The module that parses Pixar's Universal Scene Description file format.
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:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from pygments.lexer import RegexLexer, bygroups
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from pygments.lexer import words as words_
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from pygments.lexers._usd_builtins import COMMON_ATTRIBUTES, KEYWORDS, \
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OPERATORS, SPECIAL_NAMES, TYPES
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from pygments.token import Comment, Keyword, Name, Number, Operator, \
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Punctuation, String, Text, Whitespace
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__all__ = ["UsdLexer"]
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def _keywords(words, type_):
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return [(words_(words, prefix=r"\b", suffix=r"\b"), type_)]
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_TYPE = r"(\w+(?:\[\])?)"
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_BASE_ATTRIBUTE = r"(\w+(?:\:\w+)*)(?:(\.)(timeSamples))?"
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_WHITESPACE = r"([ \t]+)"
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class UsdLexer(RegexLexer):
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"""
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A lexer that parses Pixar's Universal Scene Description file format.
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.. versionadded:: 2.6
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"""
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name = "USD"
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aliases = ["usd", "usda"]
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filenames = ["*.usd", "*.usda"]
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tokens = {
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"root": [
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(r"(custom){_WHITESPACE}(uniform)(\s+){}(\s+){}(\s*)(=)".format(
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_TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
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bygroups(Keyword.Token, Whitespace, Keyword.Token, Whitespace,
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Keyword.Type, Whitespace, Name.Attribute, Text,
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Name.Keyword.Tokens, Whitespace, Operator)),
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(r"(custom){_WHITESPACE}{}(\s+){}(\s*)(=)".format(
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_TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
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bygroups(Keyword.Token, Whitespace, Keyword.Type, Whitespace,
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Name.Attribute, Text, Name.Keyword.Tokens, Whitespace,
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Operator)),
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(r"(uniform){_WHITESPACE}{}(\s+){}(\s*)(=)".format(
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_TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
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bygroups(Keyword.Token, Whitespace, Keyword.Type, Whitespace,
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Name.Attribute, Text, Name.Keyword.Tokens, Whitespace,
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Operator)),
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(r"{}{_WHITESPACE}{}(\s*)(=)".format(
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_TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
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bygroups(Keyword.Type, Whitespace, Name.Attribute, Text,
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Name.Keyword.Tokens, Whitespace, Operator)),
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] +
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_keywords(KEYWORDS, Keyword.Tokens) +
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_keywords(SPECIAL_NAMES, Name.Builtins) +
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_keywords(COMMON_ATTRIBUTES, Name.Attribute) +
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[(r"\b\w+:[\w:]+\b", Name.Attribute)] +
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_keywords(OPERATORS, Operator) + # more attributes
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[(type_ + r"\[\]", Keyword.Type) for type_ in TYPES] +
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_keywords(TYPES, Keyword.Type) +
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[
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(r"[(){}\[\]]", Punctuation),
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("#.*?$", Comment.Single),
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(",", Punctuation),
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(";", Punctuation), # ";"s are allowed to combine separate metadata lines
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("=", Operator),
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(r"[-]*([0-9]*[.])?[0-9]+(?:e[+-]*\d+)?", Number),
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(r"'''(?:.|\n)*?'''", String),
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(r'"""(?:.|\n)*?"""', String),
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(r"'.*?'", String),
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(r'".*?"', String),
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(r"<(\.\./)*([\w/]+|[\w/]+\.\w+[\w:]*)>", Name.Namespace),
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(r"@.*?@", String.Interpol),
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(r'\(.*"[.\\n]*".*\)', String.Doc),
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(r"\A#usda .+$", Comment.Hashbang),
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(r"\s+", Whitespace),
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(r"\w+", Text),
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(r"[_:.]+", Punctuation),
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],
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}
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