764 lines
26 KiB
Python
764 lines
26 KiB
Python
"""
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pygments.lexers.data
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~~~~~~~~~~~~~~~~~~~~
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Lexers for data file format.
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:copyright: Copyright 2006-2024 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 Lexer, ExtendedRegexLexer, LexerContext, \
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include, bygroups
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from pygments.token import Comment, Error, Keyword, Literal, Name, Number, \
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Punctuation, String, Whitespace
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__all__ = ['YamlLexer', 'JsonLexer', 'JsonBareObjectLexer', 'JsonLdLexer']
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class YamlLexerContext(LexerContext):
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"""Indentation context for the YAML lexer."""
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def __init__(self, *args, **kwds):
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super().__init__(*args, **kwds)
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self.indent_stack = []
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self.indent = -1
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self.next_indent = 0
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self.block_scalar_indent = None
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class YamlLexer(ExtendedRegexLexer):
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"""
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Lexer for YAML, a human-friendly data serialization
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language.
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"""
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name = 'YAML'
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url = 'http://yaml.org/'
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aliases = ['yaml']
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filenames = ['*.yaml', '*.yml']
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mimetypes = ['text/x-yaml']
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version_added = '0.11'
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def something(token_class):
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"""Do not produce empty tokens."""
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def callback(lexer, match, context):
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text = match.group()
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if not text:
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return
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def reset_indent(token_class):
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"""Reset the indentation levels."""
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def callback(lexer, match, context):
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text = match.group()
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context.indent_stack = []
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context.indent = -1
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context.next_indent = 0
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context.block_scalar_indent = None
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def save_indent(token_class, start=False):
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"""Save a possible indentation level."""
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def callback(lexer, match, context):
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text = match.group()
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extra = ''
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if start:
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context.next_indent = len(text)
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if context.next_indent < context.indent:
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while context.next_indent < context.indent:
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context.indent = context.indent_stack.pop()
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if context.next_indent > context.indent:
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extra = text[context.indent:]
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text = text[:context.indent]
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else:
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context.next_indent += len(text)
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if text:
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yield match.start(), token_class, text
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if extra:
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yield match.start()+len(text), token_class.Error, extra
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context.pos = match.end()
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return callback
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def set_indent(token_class, implicit=False):
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"""Set the previously saved indentation level."""
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def callback(lexer, match, context):
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text = match.group()
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if context.indent < context.next_indent:
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context.indent_stack.append(context.indent)
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context.indent = context.next_indent
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if not implicit:
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context.next_indent += len(text)
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def set_block_scalar_indent(token_class):
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"""Set an explicit indentation level for a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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context.block_scalar_indent = None
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if not text:
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return
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increment = match.group(1)
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if increment:
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current_indent = max(context.indent, 0)
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increment = int(increment)
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context.block_scalar_indent = current_indent + increment
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def parse_block_scalar_empty_line(indent_token_class, content_token_class):
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"""Process an empty line in a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if (context.block_scalar_indent is None or
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len(text) <= context.block_scalar_indent):
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if text:
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yield match.start(), indent_token_class, text
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else:
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indentation = text[:context.block_scalar_indent]
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content = text[context.block_scalar_indent:]
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yield match.start(), indent_token_class, indentation
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yield (match.start()+context.block_scalar_indent,
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content_token_class, content)
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context.pos = match.end()
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return callback
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def parse_block_scalar_indent(token_class):
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"""Process indentation spaces in a block scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if context.block_scalar_indent is None:
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if len(text) <= max(context.indent, 0):
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context.stack.pop()
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context.stack.pop()
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return
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context.block_scalar_indent = len(text)
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else:
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if len(text) < context.block_scalar_indent:
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context.stack.pop()
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context.stack.pop()
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return
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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def parse_plain_scalar_indent(token_class):
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"""Process indentation spaces in a plain scalar."""
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def callback(lexer, match, context):
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text = match.group()
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if len(text) <= context.indent:
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context.stack.pop()
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context.stack.pop()
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return
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if text:
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yield match.start(), token_class, text
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context.pos = match.end()
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return callback
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tokens = {
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# the root rules
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'root': [
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# ignored whitespaces
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(r'[ ]+(?=#|$)', Whitespace),
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# line breaks
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(r'\n+', Whitespace),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# the '%YAML' directive
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(r'^%YAML(?=[ ]|$)', reset_indent(Name.Tag), 'yaml-directive'),
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# the %TAG directive
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(r'^%TAG(?=[ ]|$)', reset_indent(Name.Tag), 'tag-directive'),
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# document start and document end indicators
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(r'^(?:---|\.\.\.)(?=[ ]|$)', reset_indent(Name.Namespace),
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'block-line'),
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# indentation spaces
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(r'[ ]*(?!\s|$)', save_indent(Whitespace, start=True),
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('block-line', 'indentation')),
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],
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# trailing whitespaces after directives or a block scalar indicator
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'ignored-line': [
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# ignored whitespaces
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(r'[ ]+(?=#|$)', Whitespace),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# line break
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(r'\n', Whitespace, '#pop:2'),
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],
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# the %YAML directive
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'yaml-directive': [
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# the version number
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(r'([ ]+)([0-9]+\.[0-9]+)',
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bygroups(Whitespace, Number), 'ignored-line'),
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],
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# the %TAG directive
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'tag-directive': [
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# a tag handle and the corresponding prefix
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(r'([ ]+)(!|![\w-]*!)'
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r'([ ]+)(!|!?[\w;/?:@&=+$,.!~*\'()\[\]%-]+)',
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bygroups(Whitespace, Keyword.Type, Whitespace, Keyword.Type),
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'ignored-line'),
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],
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# block scalar indicators and indentation spaces
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'indentation': [
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# trailing whitespaces are ignored
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(r'[ ]*$', something(Whitespace), '#pop:2'),
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# whitespaces preceding block collection indicators
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(r'[ ]+(?=[?:-](?:[ ]|$))', save_indent(Whitespace)),
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# block collection indicators
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(r'[?:-](?=[ ]|$)', set_indent(Punctuation.Indicator)),
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# the beginning a block line
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(r'[ ]*', save_indent(Whitespace), '#pop'),
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],
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# an indented line in the block context
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'block-line': [
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# the line end
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(r'[ ]*(?=#|$)', something(Whitespace), '#pop'),
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# whitespaces separating tokens
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(r'[ ]+', Whitespace),
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# key with colon
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(r'''([^#,?\[\]{}"'\n]+)(:)(?=[ ]|$)''',
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bygroups(Name.Tag, set_indent(Punctuation, implicit=True))),
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# tags, anchors and aliases,
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include('descriptors'),
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# block collections and scalars
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include('block-nodes'),
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# flow collections and quoted scalars
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include('flow-nodes'),
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# a plain scalar
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(r'(?=[^\s?:,\[\]{}#&*!|>\'"%@`-]|[?:-]\S)',
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something(Name.Variable),
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'plain-scalar-in-block-context'),
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],
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# tags, anchors, aliases
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'descriptors': [
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# a full-form tag
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(r'!<[\w#;/?:@&=+$,.!~*\'()\[\]%-]+>', Keyword.Type),
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# a tag in the form '!', '!suffix' or '!handle!suffix'
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(r'!(?:[\w-]+!)?'
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r'[\w#;/?:@&=+$,.!~*\'()\[\]%-]*', Keyword.Type),
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# an anchor
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(r'&[\w-]+', Name.Label),
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# an alias
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(r'\*[\w-]+', Name.Variable),
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],
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# block collections and scalars
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'block-nodes': [
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# implicit key
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(r':(?=[ ]|$)', set_indent(Punctuation.Indicator, implicit=True)),
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# literal and folded scalars
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(r'[|>]', Punctuation.Indicator,
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('block-scalar-content', 'block-scalar-header')),
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],
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# flow collections and quoted scalars
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'flow-nodes': [
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# a flow sequence
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(r'\[', Punctuation.Indicator, 'flow-sequence'),
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# a flow mapping
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(r'\{', Punctuation.Indicator, 'flow-mapping'),
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# a single-quoted scalar
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(r'\'', String, 'single-quoted-scalar'),
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# a double-quoted scalar
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(r'\"', String, 'double-quoted-scalar'),
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],
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# the content of a flow collection
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'flow-collection': [
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# whitespaces
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(r'[ ]+', Whitespace),
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# line breaks
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(r'\n+', Whitespace),
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# a comment
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(r'#[^\n]*', Comment.Single),
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# simple indicators
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(r'[?:,]', Punctuation.Indicator),
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# tags, anchors and aliases
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include('descriptors'),
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# nested collections and quoted scalars
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include('flow-nodes'),
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# a plain scalar
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(r'(?=[^\s?:,\[\]{}#&*!|>\'"%@`])',
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something(Name.Variable),
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'plain-scalar-in-flow-context'),
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],
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# a flow sequence indicated by '[' and ']'
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'flow-sequence': [
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# include flow collection rules
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include('flow-collection'),
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# the closing indicator
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(r'\]', Punctuation.Indicator, '#pop'),
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],
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# a flow mapping indicated by '{' and '}'
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'flow-mapping': [
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# key with colon
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(r'''([^,:?\[\]{}"'\n]+)(:)(?=[ ]|$)''',
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bygroups(Name.Tag, Punctuation)),
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# include flow collection rules
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include('flow-collection'),
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# the closing indicator
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(r'\}', Punctuation.Indicator, '#pop'),
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],
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# block scalar lines
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'block-scalar-content': [
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# line break
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(r'\n', Whitespace),
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# empty line
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(r'^[ ]+$',
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parse_block_scalar_empty_line(Whitespace, Name.Constant)),
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# indentation spaces (we may leave the state here)
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(r'^[ ]*', parse_block_scalar_indent(Whitespace)),
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# line content
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(r'[\S\t ]+', Name.Constant),
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],
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# the content of a literal or folded scalar
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'block-scalar-header': [
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# indentation indicator followed by chomping flag
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(r'([1-9])?[+-]?(?=[ ]|$)',
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set_block_scalar_indent(Punctuation.Indicator),
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'ignored-line'),
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# chomping flag followed by indentation indicator
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(r'[+-]?([1-9])?(?=[ ]|$)',
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set_block_scalar_indent(Punctuation.Indicator),
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'ignored-line'),
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],
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# ignored and regular whitespaces in quoted scalars
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'quoted-scalar-whitespaces': [
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# leading and trailing whitespaces are ignored
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(r'^[ ]+', Whitespace),
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(r'[ ]+$', Whitespace),
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# line breaks are ignored
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(r'\n+', Whitespace),
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# other whitespaces are a part of the value
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(r'[ ]+', Name.Variable),
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],
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# single-quoted scalars
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'single-quoted-scalar': [
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# include whitespace and line break rules
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include('quoted-scalar-whitespaces'),
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# escaping of the quote character
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(r'\'\'', String.Escape),
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# regular non-whitespace characters
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(r'[^\s\']+', String),
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# the closing quote
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(r'\'', String, '#pop'),
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],
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# double-quoted scalars
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'double-quoted-scalar': [
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# include whitespace and line break rules
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include('quoted-scalar-whitespaces'),
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# escaping of special characters
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(r'\\[0abt\tn\nvfre "\\N_LP]', String),
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# escape codes
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(r'\\(?:x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})',
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String.Escape),
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# regular non-whitespace characters
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(r'[^\s"\\]+', String),
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# the closing quote
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(r'"', String, '#pop'),
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],
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# the beginning of a new line while scanning a plain scalar
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'plain-scalar-in-block-context-new-line': [
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# empty lines
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(r'^[ ]+$', Whitespace),
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# line breaks
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(r'\n+', Whitespace),
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# document start and document end indicators
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(r'^(?=---|\.\.\.)', something(Name.Namespace), '#pop:3'),
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# indentation spaces (we may leave the block line state here)
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(r'^[ ]*', parse_plain_scalar_indent(Whitespace), '#pop'),
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],
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# a plain scalar in the block context
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'plain-scalar-in-block-context': [
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# the scalar ends with the ':' indicator
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(r'[ ]*(?=:[ ]|:$)', something(Whitespace), '#pop'),
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# the scalar ends with whitespaces followed by a comment
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(r'[ ]+(?=#)', Whitespace, '#pop'),
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# trailing whitespaces are ignored
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(r'[ ]+$', Whitespace),
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# line breaks are ignored
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(r'\n+', Whitespace, 'plain-scalar-in-block-context-new-line'),
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# other whitespaces are a part of the value
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(r'[ ]+', Literal.Scalar.Plain),
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# regular non-whitespace characters
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(r'(?::(?!\s)|[^\s:])+', Literal.Scalar.Plain),
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],
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# a plain scalar is the flow context
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'plain-scalar-in-flow-context': [
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# the scalar ends with an indicator character
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(r'[ ]*(?=[,:?\[\]{}])', something(Whitespace), '#pop'),
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# the scalar ends with a comment
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(r'[ ]+(?=#)', Whitespace, '#pop'),
|
|
# leading and trailing whitespaces are ignored
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(r'^[ ]+', Whitespace),
|
|
(r'[ ]+$', Whitespace),
|
|
# line breaks are ignored
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|
(r'\n+', Whitespace),
|
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# other whitespaces are a part of the value
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(r'[ ]+', Name.Variable),
|
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# regular non-whitespace characters
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(r'[^\s,:?\[\]{}]+', Name.Variable),
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],
|
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}
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def get_tokens_unprocessed(self, text=None, context=None):
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if context is None:
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context = YamlLexerContext(text, 0)
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return super().get_tokens_unprocessed(text, context)
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|
|
|
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class JsonLexer(Lexer):
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"""
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|
For JSON data structures.
|
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Javascript-style comments are supported (like ``/* */`` and ``//``),
|
|
though comments are not part of the JSON specification.
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|
This allows users to highlight JSON as it is used in the wild.
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No validation is performed on the input JSON document.
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"""
|
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|
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name = 'JSON'
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url = 'https://www.json.org'
|
|
aliases = ['json', 'json-object']
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filenames = ['*.json', '*.jsonl', '*.ndjson', 'Pipfile.lock']
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mimetypes = ['application/json', 'application/json-object', 'application/x-ndjson', 'application/jsonl', 'application/json-seq']
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|
version_added = '1.5'
|
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|
|
# No validation of integers, floats, or constants is done.
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|
# As long as the characters are members of the following
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|
# sets, the token will be considered valid. For example,
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#
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# "--1--" is parsed as an integer
|
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# "1...eee" is parsed as a float
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|
# "trustful" is parsed as a constant
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|
#
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integers = set('-0123456789')
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|
floats = set('.eE+')
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|
constants = set('truefalsenull') # true|false|null
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hexadecimals = set('0123456789abcdefABCDEF')
|
|
punctuations = set('{}[],')
|
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whitespaces = {'\u0020', '\u000a', '\u000d', '\u0009'}
|
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|
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def get_tokens_unprocessed(self, text):
|
|
"""Parse JSON data."""
|
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|
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in_string = False
|
|
in_escape = False
|
|
in_unicode_escape = 0
|
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in_whitespace = False
|
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in_constant = False
|
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in_number = False
|
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in_float = False
|
|
in_punctuation = False
|
|
in_comment_single = False
|
|
in_comment_multiline = False
|
|
expecting_second_comment_opener = False # // or /*
|
|
expecting_second_comment_closer = False # */
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|
|
start = 0
|
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|
|
# The queue is used to store data that may need to be tokenized
|
|
# differently based on what follows. In particular, JSON object
|
|
# keys are tokenized differently than string values, but cannot
|
|
# be distinguished until punctuation is encountered outside the
|
|
# string.
|
|
#
|
|
# A ":" character after the string indicates that the string is
|
|
# an object key; any other character indicates the string is a
|
|
# regular string value.
|
|
#
|
|
# The queue holds tuples that contain the following data:
|
|
#
|
|
# (start_index, token_type, text)
|
|
#
|
|
# By default the token type of text in double quotes is
|
|
# String.Double. The token type will be replaced if a colon
|
|
# is encountered after the string closes.
|
|
#
|
|
queue = []
|
|
|
|
for stop, character in enumerate(text):
|
|
if in_string:
|
|
if in_unicode_escape:
|
|
if character in self.hexadecimals:
|
|
in_unicode_escape -= 1
|
|
if not in_unicode_escape:
|
|
in_escape = False
|
|
else:
|
|
in_unicode_escape = 0
|
|
in_escape = False
|
|
|
|
elif in_escape:
|
|
if character == 'u':
|
|
in_unicode_escape = 4
|
|
else:
|
|
in_escape = False
|
|
|
|
elif character == '\\':
|
|
in_escape = True
|
|
|
|
elif character == '"':
|
|
queue.append((start, String.Double, text[start:stop + 1]))
|
|
in_string = False
|
|
in_escape = False
|
|
in_unicode_escape = 0
|
|
|
|
continue
|
|
|
|
elif in_whitespace:
|
|
if character in self.whitespaces:
|
|
continue
|
|
|
|
if queue:
|
|
queue.append((start, Whitespace, text[start:stop]))
|
|
else:
|
|
yield start, Whitespace, text[start:stop]
|
|
in_whitespace = False
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
elif in_constant:
|
|
if character in self.constants:
|
|
continue
|
|
|
|
yield start, Keyword.Constant, text[start:stop]
|
|
in_constant = False
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
elif in_number:
|
|
if character in self.integers:
|
|
continue
|
|
elif character in self.floats:
|
|
in_float = True
|
|
continue
|
|
|
|
if in_float:
|
|
yield start, Number.Float, text[start:stop]
|
|
else:
|
|
yield start, Number.Integer, text[start:stop]
|
|
in_number = False
|
|
in_float = False
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
elif in_punctuation:
|
|
if character in self.punctuations:
|
|
continue
|
|
|
|
yield start, Punctuation, text[start:stop]
|
|
in_punctuation = False
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
elif in_comment_single:
|
|
if character != '\n':
|
|
continue
|
|
|
|
if queue:
|
|
queue.append((start, Comment.Single, text[start:stop]))
|
|
else:
|
|
yield start, Comment.Single, text[start:stop]
|
|
|
|
in_comment_single = False
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
elif in_comment_multiline:
|
|
if character == '*':
|
|
expecting_second_comment_closer = True
|
|
elif expecting_second_comment_closer:
|
|
expecting_second_comment_closer = False
|
|
if character == '/':
|
|
if queue:
|
|
queue.append((start, Comment.Multiline, text[start:stop + 1]))
|
|
else:
|
|
yield start, Comment.Multiline, text[start:stop + 1]
|
|
|
|
in_comment_multiline = False
|
|
|
|
continue
|
|
|
|
elif expecting_second_comment_opener:
|
|
expecting_second_comment_opener = False
|
|
if character == '/':
|
|
in_comment_single = True
|
|
continue
|
|
elif character == '*':
|
|
in_comment_multiline = True
|
|
continue
|
|
|
|
# Exhaust the queue. Accept the existing token types.
|
|
yield from queue
|
|
queue.clear()
|
|
|
|
yield start, Error, text[start:stop]
|
|
# Fall through so the new character can be evaluated.
|
|
|
|
start = stop
|
|
|
|
if character == '"':
|
|
in_string = True
|
|
|
|
elif character in self.whitespaces:
|
|
in_whitespace = True
|
|
|
|
elif character in {'f', 'n', 't'}: # The first letters of true|false|null
|
|
# Exhaust the queue. Accept the existing token types.
|
|
yield from queue
|
|
queue.clear()
|
|
|
|
in_constant = True
|
|
|
|
elif character in self.integers:
|
|
# Exhaust the queue. Accept the existing token types.
|
|
yield from queue
|
|
queue.clear()
|
|
|
|
in_number = True
|
|
|
|
elif character == ':':
|
|
# Yield from the queue. Replace string token types.
|
|
for _start, _token, _text in queue:
|
|
# There can be only three types of tokens before a ':':
|
|
# Whitespace, Comment, or a quoted string.
|
|
#
|
|
# If it's a quoted string we emit Name.Tag.
|
|
# Otherwise, we yield the original token.
|
|
#
|
|
# In all other cases this would be invalid JSON,
|
|
# but this is not a validating JSON lexer, so it's OK.
|
|
if _token is String.Double:
|
|
yield _start, Name.Tag, _text
|
|
else:
|
|
yield _start, _token, _text
|
|
queue.clear()
|
|
|
|
in_punctuation = True
|
|
|
|
elif character in self.punctuations:
|
|
# Exhaust the queue. Accept the existing token types.
|
|
yield from queue
|
|
queue.clear()
|
|
|
|
in_punctuation = True
|
|
|
|
elif character == '/':
|
|
# This is the beginning of a comment.
|
|
expecting_second_comment_opener = True
|
|
|
|
else:
|
|
# Exhaust the queue. Accept the existing token types.
|
|
yield from queue
|
|
queue.clear()
|
|
|
|
yield start, Error, character
|
|
|
|
# Yield any remaining text.
|
|
yield from queue
|
|
if in_string:
|
|
yield start, Error, text[start:]
|
|
elif in_float:
|
|
yield start, Number.Float, text[start:]
|
|
elif in_number:
|
|
yield start, Number.Integer, text[start:]
|
|
elif in_constant:
|
|
yield start, Keyword.Constant, text[start:]
|
|
elif in_whitespace:
|
|
yield start, Whitespace, text[start:]
|
|
elif in_punctuation:
|
|
yield start, Punctuation, text[start:]
|
|
elif in_comment_single:
|
|
yield start, Comment.Single, text[start:]
|
|
elif in_comment_multiline:
|
|
yield start, Error, text[start:]
|
|
elif expecting_second_comment_opener:
|
|
yield start, Error, text[start:]
|
|
|
|
|
|
class JsonBareObjectLexer(JsonLexer):
|
|
"""
|
|
For JSON data structures (with missing object curly braces).
|
|
|
|
.. deprecated:: 2.8.0
|
|
|
|
Behaves the same as `JsonLexer` now.
|
|
"""
|
|
|
|
name = 'JSONBareObject'
|
|
aliases = []
|
|
filenames = []
|
|
mimetypes = []
|
|
version_added = '2.2'
|
|
|
|
|
|
class JsonLdLexer(JsonLexer):
|
|
"""
|
|
For JSON-LD linked data.
|
|
"""
|
|
|
|
name = 'JSON-LD'
|
|
url = 'https://json-ld.org/'
|
|
aliases = ['jsonld', 'json-ld']
|
|
filenames = ['*.jsonld']
|
|
mimetypes = ['application/ld+json']
|
|
version_added = '2.0'
|
|
|
|
json_ld_keywords = {
|
|
f'"@{keyword}"'
|
|
for keyword in (
|
|
'base',
|
|
'container',
|
|
'context',
|
|
'direction',
|
|
'graph',
|
|
'id',
|
|
'import',
|
|
'included',
|
|
'index',
|
|
'json',
|
|
'language',
|
|
'list',
|
|
'nest',
|
|
'none',
|
|
'prefix',
|
|
'propagate',
|
|
'protected',
|
|
'reverse',
|
|
'set',
|
|
'type',
|
|
'value',
|
|
'version',
|
|
'vocab',
|
|
)
|
|
}
|
|
|
|
def get_tokens_unprocessed(self, text):
|
|
for start, token, value in super().get_tokens_unprocessed(text):
|
|
if token is Name.Tag and value in self.json_ld_keywords:
|
|
yield start, Name.Decorator, value
|
|
else:
|
|
yield start, token, value
|