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File Content: `highlighting.py`

"""
    sphinx.highlighting
    ~~~~~~~~~~~~~~~~~~~

    Highlight code blocks using Pygments.

    :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

from functools import partial
from importlib import import_module
from typing import Any, Dict

from packaging import version
from pygments import __version__ as pygmentsversion
from pygments import highlight
from pygments.filters import ErrorToken
from pygments.formatter import Formatter
from pygments.formatters import HtmlFormatter, LatexFormatter
from pygments.lexer import Lexer
from pygments.lexers import (CLexer, Python3Lexer, PythonConsoleLexer, PythonLexer, RstLexer,
                             TextLexer, get_lexer_by_name, guess_lexer)
from pygments.style import Style
from pygments.styles import get_style_by_name
from pygments.util import ClassNotFound

from sphinx.locale import __
from sphinx.pygments_styles import NoneStyle, SphinxStyle
from sphinx.util import logging, texescape

logger = logging.getLogger(__name__)

lexers: Dict[str, Lexer] = {}
lexer_classes: Dict[str, Lexer] = {
    'none': partial(TextLexer, stripnl=False),
    'python': partial(PythonLexer, stripnl=False),
    'python3': partial(Python3Lexer, stripnl=False),
    'pycon': partial(PythonConsoleLexer, stripnl=False),
    'pycon3': partial(PythonConsoleLexer, python3=True, stripnl=False),
    'rest': partial(RstLexer, stripnl=False),
    'c': partial(CLexer, stripnl=False),
}


escape_hl_chars = {ord('\\'): '\\PYGZbs{}',
                   ord('{'): '\\PYGZob{}',
                   ord('}'): '\\PYGZcb{}'}

# used if Pygments is available
# use textcomp quote to get a true single quote
_LATEX_ADD_STYLES = r'''
\renewcommand\PYGZsq{\textquotesingle}
'''
# fix extra space between lines when Pygments highlighting uses \fcolorbox
# add a {..} to limit \fboxsep scope, and force \fcolorbox use correct value
# cf pygments #1708 which makes this unneeded for Pygments > 2.7.4
_LATEX_ADD_STYLES_FIXPYG = r'''
\makeatletter
% fix for Pygments <= 2.7.4
\let\spx@original@fcolorbox\fcolorbox
\def\spx@fixpyg@fcolorbox{\fboxsep-\fboxrule\spx@original@fcolorbox}
\def\PYG#1#2{\PYG@reset\PYG@toks#1+\relax+%
             {\let\fcolorbox\spx@fixpyg@fcolorbox\PYG@do{#2}}}
\makeatother
'''
if version.parse(pygmentsversion).release <= (2, 7, 4):
    _LATEX_ADD_STYLES += _LATEX_ADD_STYLES_FIXPYG


class PygmentsBridge:
    # Set these attributes if you want to have different Pygments formatters
    # than the default ones.
    html_formatter = HtmlFormatter
    latex_formatter = LatexFormatter

    def __init__(self, dest: str = 'html', stylename: str = 'sphinx',
                 latex_engine: str = None) -> None:
        self.dest = dest
        self.latex_engine = latex_engine

        style = self.get_style(stylename)
        self.formatter_args: Dict[str, Any] = {'style': style}
        if dest == 'html':
            self.formatter = self.html_formatter
        else:
            self.formatter = self.latex_formatter
            self.formatter_args['commandprefix'] = 'PYG'

    def get_style(self, stylename: str) -> Style:
        if stylename is None or stylename == 'sphinx':
            return SphinxStyle
        elif stylename == 'none':
            return NoneStyle
        elif '.' in stylename:
            module, stylename = stylename.rsplit('.', 1)
            return getattr(import_module(module), stylename)
        else:
            return get_style_by_name(stylename)

    def get_formatter(self, **kwargs: Any) -> Formatter:
        kwargs.update(self.formatter_args)
        return self.formatter(**kwargs)

    def get_lexer(self, source: str, lang: str, opts: Dict = None,
                  force: bool = False, location: Any = None) -> Lexer:
        if not opts:
            opts = {}

        # find out which lexer to use
        if lang in ('py', 'python'):
            if source.startswith('>>>'):
                # interactive session
                lang = 'pycon'
            else:
                lang = 'python'
        elif lang in ('py3', 'python3', 'default'):
            if source.startswith('>>>'):
                lang = 'pycon3'
            else:
                lang = 'python3'

        if lang in lexers:
            # just return custom lexers here (without installing raiseonerror filter)
            return lexers[lang]
        elif lang in lexer_classes:
            lexer = lexer_classes[lang](**opts)
        else:
            try:
                if lang == 'guess':
                    lexer = guess_lexer(source, **opts)
                else:
                    lexer = get_lexer_by_name(lang, **opts)
            except ClassNotFound:
                logger.warning(__('Pygments lexer name %r is not known'), lang,
                               location=location)
                lexer = lexer_classes['none'](**opts)

        if not force:
            lexer.add_filter('raiseonerror')

        return lexer

    def highlight_block(self, source: str, lang: str, opts: Dict = None,
                        force: bool = False, location: Any = None, **kwargs: Any) -> str:
        if not isinstance(source, str):
            source = source.decode()

        lexer = self.get_lexer(source, lang, opts, force, location)

        # highlight via Pygments
        formatter = self.get_formatter(**kwargs)
        try:
            hlsource = highlight(source, lexer, formatter)
        except ErrorToken:
            # this is most probably not the selected language,
            # so let it pass unhighlighted
            if lang == 'default':
                pass  # automatic highlighting failed.
            else:
                logger.warning(__('Could not lex literal_block as "%s". '
                                  'Highlighting skipped.'), lang,
                               type='misc', subtype='highlighting_failure',
                               location=location)
            lexer = self.get_lexer(source, 'none', opts, force, location)
            hlsource = highlight(source, lexer, formatter)

        if self.dest == 'html':
            return hlsource
        else:
            # MEMO: this is done to escape Unicode chars with non-Unicode engines
            return texescape.hlescape(hlsource, self.latex_engine)

    def get_stylesheet(self) -> str:
        formatter = self.get_formatter()
        if self.dest == 'html':
            return formatter.get_style_defs('.highlight')
        else:
            return formatter.get_style_defs() + _LATEX_ADD_STYLES

Name	Size	Permission
__pycache__	---	0755
builders	---	0755
cmd	---	0755
directives	---	0755
domains	---	0755
environment	---	0755
ext	---	0755
locale	---	0755
pycode	---	0755
search	---	0755
testing	---	0755
texinputs_win	---	0755
transforms	---	0755
util	---	0755
writers	---	0755
__init__.py	2142 bytes	0644
__main__.py	280 bytes	0644
addnodes.py	17784 bytes	0644
application.py	54620 bytes	0644
config.py	20398 bytes	0644
deprecation.py	2955 bytes	0644
errors.py	3588 bytes	0644
events.py	4243 bytes	0644
extension.py	2815 bytes	0644
highlighting.py	6560 bytes	0644
io.py	6548 bytes	0644
jinja2glue.py	7184 bytes	0644
parsers.py	3899 bytes	0644
project.py	3531 bytes	0644
py.typed	0 bytes	0644
pygments_styles.py	3024 bytes	0644
registry.py	22140 bytes	0644
roles.py	13846 bytes	0644
setup_command.py	7024 bytes	0644
theming.py	8597 bytes	0644
versioning.py	5952 bytes	0644

File Content: highlighting.py

File Content: `highlighting.py`