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- """
- pygments.lexers.usd
- ~~~~~~~~~~~~~~~~~~~
- The module that parses Pixar's Universal Scene Description file format.
- :copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
- :license: BSD, see LICENSE for details.
- """
- from pygments.lexer import RegexLexer, bygroups
- from pygments.lexer import words as words_
- from pygments.lexers._usd_builtins import COMMON_ATTRIBUTES, KEYWORDS, \
- OPERATORS, SPECIAL_NAMES, TYPES
- from pygments.token import Comment, Keyword, Name, Number, Operator, \
- Punctuation, String, Text, Whitespace
- __all__ = ["UsdLexer"]
- def _keywords(words, type_):
- return [(words_(words, prefix=r"\b", suffix=r"\b"), type_)]
- _TYPE = r"(\w+(?:\[\])?)"
- _BASE_ATTRIBUTE = r"(\w+(?:\:\w+)*)(?:(\.)(timeSamples))?"
- _WHITESPACE = r"([ \t]+)"
- class UsdLexer(RegexLexer):
- """
- A lexer that parses Pixar's Universal Scene Description file format.
- .. versionadded:: 2.6
- """
- name = "USD"
- url = 'https://graphics.pixar.com/usd/release/index.html'
- aliases = ["usd", "usda"]
- filenames = ["*.usd", "*.usda"]
- tokens = {
- "root": [
- (r"(custom){_WHITESPACE}(uniform)(\s+){}(\s+){}(\s*)(=)".format(
- _TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
- bygroups(Keyword.Token, Whitespace, Keyword.Token, Whitespace,
- Keyword.Type, Whitespace, Name.Attribute, Text,
- Name.Keyword.Tokens, Whitespace, Operator)),
- (r"(custom){_WHITESPACE}{}(\s+){}(\s*)(=)".format(
- _TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
- bygroups(Keyword.Token, Whitespace, Keyword.Type, Whitespace,
- Name.Attribute, Text, Name.Keyword.Tokens, Whitespace,
- Operator)),
- (r"(uniform){_WHITESPACE}{}(\s+){}(\s*)(=)".format(
- _TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
- bygroups(Keyword.Token, Whitespace, Keyword.Type, Whitespace,
- Name.Attribute, Text, Name.Keyword.Tokens, Whitespace,
- Operator)),
- (r"{}{_WHITESPACE}{}(\s*)(=)".format(
- _TYPE, _BASE_ATTRIBUTE, _WHITESPACE=_WHITESPACE),
- bygroups(Keyword.Type, Whitespace, Name.Attribute, Text,
- Name.Keyword.Tokens, Whitespace, Operator)),
- ] +
- _keywords(KEYWORDS, Keyword.Tokens) +
- _keywords(SPECIAL_NAMES, Name.Builtins) +
- _keywords(COMMON_ATTRIBUTES, Name.Attribute) +
- [(r"\b\w+:[\w:]+\b", Name.Attribute)] +
- _keywords(OPERATORS, Operator) + # more attributes
- [(type_ + r"\[\]", Keyword.Type) for type_ in TYPES] +
- _keywords(TYPES, Keyword.Type) +
- [
- (r"[(){}\[\]]", Punctuation),
- ("#.*?$", Comment.Single),
- (",", Punctuation),
- (";", Punctuation), # ";"s are allowed to combine separate metadata lines
- ("=", Operator),
- (r"[-]*([0-9]*[.])?[0-9]+(?:e[+-]*\d+)?", Number),
- (r"'''(?:.|\n)*?'''", String),
- (r'"""(?:.|\n)*?"""', String),
- (r"'.*?'", String),
- (r'".*?"', String),
- (r"<(\.\./)*([\w/]+|[\w/]+\.\w+[\w:]*)>", Name.Namespace),
- (r"@.*?@", String.Interpol),
- (r'\(.*"[.\\n]*".*\)', String.Doc),
- (r"\A#usda .+$", Comment.Hashbang),
- (r"\s+", Whitespace),
- (r"\w+", Text),
- (r"[_:.]+", Punctuation),
- ],
- }
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