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"""
pygments.formatters.html
~~~~~~~~~~~~~~~~~~~~~~~~
Formatter for HTML output.
:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import functools
import os
import sys
import os.path
from io import StringIO
from pip._vendor.pygments.formatter import Formatter
from pip._vendor.pygments.token import Token, Text, STANDARD_TYPES
from pip._vendor.pygments.util import get_bool_opt, get_int_opt, get_list_opt
try:
import ctags
except ImportError:
ctags = None
__all__ = ['HtmlFormatter']
_escape_html_table = {
ord('&'): '&',
ord('<'): '<',
ord('>'): '>',
ord('"'): '"',
ord("'"): ''',
}
def escape_html(text, table=_escape_html_table):
"""Escape &, <, > as well as single and double quotes for HTML."""
return text.translate(table)
def webify(color):
if color.startswith('calc') or color.startswith('var'):
return color
else:
return '#' + color
def _get_ttype_class(ttype):
fname = STANDARD_TYPES.get(ttype)
if fname:
return fname
aname = ''
while fname is None:
aname = '-' + ttype[-1] + aname
ttype = ttype.parent
fname = STANDARD_TYPES.get(ttype)
return fname + aname
CSSFILE_TEMPLATE = '''\
/*
generated by Pygments <https://pygments.org/>
Copyright 2006-2024 by the Pygments team.
Licensed under the BSD license, see LICENSE for details.
*/
%(styledefs)s
'''
DOC_HEADER = '''\
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<!--
generated by Pygments <https://pygments.org/>
Copyright 2006-2024 by the Pygments team.
Licensed under the BSD license, see LICENSE for details.
-->
<html>
<head>
<title>%(title)s</title>
<meta http-equiv="content-type" content="text/html; charset=%(encoding)s">
<style type="text/css">
''' + CSSFILE_TEMPLATE + '''
</style>
</head>
<body>
<h2>%(title)s</h2>
'''
DOC_HEADER_EXTERNALCSS = '''\
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>%(title)s</title>
<meta http-equiv="content-type" content="text/html; charset=%(encoding)s">
<link rel="stylesheet" href="%(cssfile)s" type="text/css">
</head>
<body>
<h2>%(title)s</h2>
'''
DOC_FOOTER = '''\
</body>
</html>
'''
class HtmlFormatter(Formatter):
r"""
Format tokens as HTML 4 ``<span>`` tags. By default, the content is enclosed
in a ``<pre>`` tag, itself wrapped in a ``<div>`` tag (but see the `nowrap` option).
The ``<div>``'s CSS class can be set by the `cssclass` option.
If the `linenos` option is set to ``"table"``, the ``<pre>`` is
additionally wrapped inside a ``<table>`` which has one row and two
cells: one containing the line numbers and one containing the code.
Example:
.. sourcecode:: html
<div class="highlight" >
<table><tr>
<td class="linenos" title="click to toggle"
onclick="with (this.firstChild.style)
{ display = (display == '') ? 'none' : '' }">
<pre>1
2</pre>
</td>
<td class="code">
<pre><span class="Ke">def </span><span class="NaFu">foo</span>(bar):
<span class="Ke">pass</span>
</pre>
</td>
</tr></table></div>
(whitespace added to improve clarity).
A list of lines can be specified using the `hl_lines` option to make these
lines highlighted (as of Pygments 0.11).
With the `full` option, a complete HTML 4 document is output, including
the style definitions inside a ``<style>`` tag, or in a separate file if
the `cssfile` option is given.
When `tagsfile` is set to the path of a ctags index file, it is used to
generate hyperlinks from names to their definition. You must enable
`lineanchors` and run ctags with the `-n` option for this to work. The
`python-ctags` module from PyPI must be installed to use this feature;
otherwise a `RuntimeError` will be raised.
The `get_style_defs(arg='')` method of a `HtmlFormatter` returns a string
containing CSS rules for the CSS classes used by the formatter. The
argument `arg` can be used to specify additional CSS selectors that
are prepended to the classes. A call `fmter.get_style_defs('td .code')`
would result in the following CSS classes:
.. sourcecode:: css
td .code .kw { font-weight: bold; color: #00FF00 }
td .code .cm { color: #999999 }
...
If you have Pygments 0.6 or higher, you can also pass a list or tuple to the
`get_style_defs()` method to request multiple prefixes for the tokens:
.. sourcecode:: python
formatter.get_style_defs(['div.syntax pre', 'pre.syntax'])
The output would then look like this:
.. sourcecode:: css
div.syntax pre .kw,
pre.syntax .kw { font-weight: bold; color: #00FF00 }
div.syntax pre .cm,
pre.syntax .cm { color: #999999 }
...
Additional options accepted:
`nowrap`
If set to ``True``, don't add a ``<pre>`` and a ``<div>`` tag
around the tokens. This disables most other options (default: ``False``).
`full`
Tells the formatter to output a "full" document, i.e. a complete
self-contained document (default: ``False``).
`title`
If `full` is true, the title that should be used to caption the
document (default: ``''``).
`style`
The style to use, can be a string or a Style subclass (default:
``'default'``). This option has no effect if the `cssfile`
and `noclobber_cssfile` option are given and the file specified in
`cssfile` exists.
`noclasses`
If set to true, token ``<span>`` tags (as well as line number elements)
will not use CSS classes, but inline styles. This is not recommended
for larger pieces of code since it increases output size by quite a bit
(default: ``False``).
`classprefix`
Since the token types use relatively short class names, they may clash
with some of your own class names. In this case you can use the
`classprefix` option to give a string to prepend to all Pygments-generated
CSS class names for token types.
Note that this option also affects the output of `get_style_defs()`.
`cssclass`
CSS class for the wrapping ``<div>`` tag (default: ``'highlight'``).
If you set this option, the default selector for `get_style_defs()`
will be this class.
.. versionadded:: 0.9
If you select the ``'table'`` line numbers, the wrapping table will
have a CSS class of this string plus ``'table'``, the default is
accordingly ``'highlighttable'``.
`cssstyles`
Inline CSS styles for the wrapping ``<div>`` tag (default: ``''``).
`prestyles`
Inline CSS styles for the ``<pre>`` tag (default: ``''``).
.. versionadded:: 0.11
`cssfile`
If the `full` option is true and this option is given, it must be the
name of an external file. If the filename does not include an absolute
path, the file's path will be assumed to be relative to the main output
file's path, if the latter can be found. The stylesheet is then written
to this file instead of the HTML file.
.. versionadded:: 0.6
`noclobber_cssfile`
If `cssfile` is given and the specified file exists, the css file will
not be overwritten. This allows the use of the `full` option in
combination with a user specified css file. Default is ``False``.
.. versionadded:: 1.1
`linenos`
If set to ``'table'``, output line numbers as a table with two cells,
one containing the line numbers, the other the whole code. This is
copy-and-paste-friendly, but may cause alignment problems with some
browsers or fonts. If set to ``'inline'``, the line numbers will be
integrated in the ``<pre>`` tag that contains the code (that setting
is *new in Pygments 0.8*).
For compatibility with Pygments 0.7 and earlier, every true value
except ``'inline'`` means the same as ``'table'`` (in particular, that
means also ``True``).
The default value is ``False``, which means no line numbers at all.
**Note:** with the default ("table") line number mechanism, the line
numbers and code can have different line heights in Internet Explorer
unless you give the enclosing ``<pre>`` tags an explicit ``line-height``
CSS property (you get the default line spacing with ``line-height:
125%``).
`hl_lines`
Specify a list of lines to be highlighted. The line numbers are always
relative to the input (i.e. the first line is line 1) and are
independent of `linenostart`.
.. versionadded:: 0.11
`linenostart`
The line number for the first line (default: ``1``).
`linenostep`
If set to a number n > 1, only every nth line number is printed.
`linenospecial`
If set to a number n > 0, every nth line number is given the CSS
class ``"special"`` (default: ``0``).
`nobackground`
If set to ``True``, the formatter won't output the background color
for the wrapping element (this automatically defaults to ``False``
when there is no wrapping element [eg: no argument for the
`get_syntax_defs` method given]) (default: ``False``).
.. versionadded:: 0.6
`lineseparator`
This string is output between lines of code. It defaults to ``"\n"``,
which is enough to break a line inside ``<pre>`` tags, but you can
e.g. set it to ``"<br>"`` to get HTML line breaks.
.. versionadded:: 0.7
`lineanchors`
If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
output line in an anchor tag with an ``id`` (and `name`) of ``foo-linenumber``.
This allows easy linking to certain lines.
.. versionadded:: 0.9
`linespans`
If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
output line in a span tag with an ``id`` of ``foo-linenumber``.
This allows easy access to lines via javascript.
.. versionadded:: 1.6
`anchorlinenos`
If set to `True`, will wrap line numbers in <a> tags. Used in
combination with `linenos` and `lineanchors`.
`tagsfile`
If set to the path of a ctags file, wrap names in anchor tags that
link to their definitions. `lineanchors` should be used, and the
tags file should specify line numbers (see the `-n` option to ctags).
The tags file is assumed to be encoded in UTF-8.
.. versionadded:: 1.6
`tagurlformat`
A string formatting pattern used to generate links to ctags definitions.
Available variables are `%(path)s`, `%(fname)s` and `%(fext)s`.
Defaults to an empty string, resulting in just `#prefix-number` links.
.. versionadded:: 1.6
`filename`
A string used to generate a filename when rendering ``<pre>`` blocks,
for example if displaying source code. If `linenos` is set to
``'table'`` then the filename will be rendered in an initial row
containing a single `<th>` which spans both columns.
.. versionadded:: 2.1
`wrapcode`
Wrap the code inside ``<pre>`` blocks using ``<code>``, as recommended
by the HTML5 specification.
.. versionadded:: 2.4
`debug_token_types`
Add ``title`` attributes to all token ``<span>`` tags that show the
name of the token.
.. versionadded:: 2.10
**Subclassing the HTML formatter**
.. versionadded:: 0.7
The HTML formatter is now built in a way that allows easy subclassing, thus
customizing the output HTML code. The `format()` method calls
`self._format_lines()` which returns a generator that yields tuples of ``(1,
line)``, where the ``1`` indicates that the ``line`` is a line of the
formatted source code.
If the `nowrap` option is set, the generator is the iterated over and the
resulting HTML is output.
Otherwise, `format()` calls `self.wrap()`, which wraps the generator with
other generators. These may add some HTML code to the one generated by
`_format_lines()`, either by modifying the lines generated by the latter,
then yielding them again with ``(1, line)``, and/or by yielding other HTML
code before or after the lines, with ``(0, html)``. The distinction between
source lines and other code makes it possible to wrap the generator multiple
times.
The default `wrap()` implementation adds a ``<div>`` and a ``<pre>`` tag.
A custom `HtmlFormatter` subclass could look like this:
.. sourcecode:: python
class CodeHtmlFormatter(HtmlFormatter):
def wrap(self, source, *, include_div):
return self._wrap_code(source)
def _wrap_code(self, source):
yield 0, '<code>'
for i, t in source:
if i == 1:
# it's a line of formatted code
t += '<br>'
yield i, t
yield 0, '</code>'
This results in wrapping the formatted lines with a ``<code>`` tag, where the
source lines are broken using ``<br>`` tags.
After calling `wrap()`, the `format()` method also adds the "line numbers"
and/or "full document" wrappers if the respective options are set. Then, all
HTML yielded by the wrapped generator is output.
"""
name = 'HTML'
aliases = ['html']
filenames = ['*.html', '*.htm']
def __init__(self, **options):
Formatter.__init__(self, **options)
self.title = self._decodeifneeded(self.title)
self.nowrap = get_bool_opt(options, 'nowrap', False)
self.noclasses = get_bool_opt(options, 'noclasses', False)
self.classprefix = options.get('classprefix', '')
self.cssclass = self._decodeifneeded(options.get('cssclass', 'highlight'))
self.cssstyles = self._decodeifneeded(options.get('cssstyles', ''))
self.prestyles = self._decodeifneeded(options.get('prestyles', ''))
self.cssfile = self._decodeifneeded(options.get('cssfile', ''))
self.noclobber_cssfile = get_bool_opt(options, 'noclobber_cssfile', False)
self.tagsfile = self._decodeifneeded(options.get('tagsfile', ''))
self.tagurlformat = self._decodeifneeded(options.get('tagurlformat', ''))
self.filename = self._decodeifneeded(options.get('filename', ''))
self.wrapcode = get_bool_opt(options, 'wrapcode', False)
self.span_element_openers = {}
self.debug_token_types = get_bool_opt(options, 'debug_token_types', False)
if self.tagsfile:
if not ctags:
raise RuntimeError('The "ctags" package must to be installed '
'to be able to use the "tagsfile" feature.')
self._ctags = ctags.CTags(self.tagsfile)
linenos = options.get('linenos', False)
if linenos == 'inline':
self.linenos = 2
elif linenos:
# compatibility with <= 0.7
self.linenos = 1
else:
self.linenos = 0
self.linenostart = abs(get_int_opt(options, 'linenostart', 1))
self.linenostep = abs(get_int_opt(options, 'linenostep', 1))
self.linenospecial = abs(get_int_opt(options, 'linenospecial', 0))
self.nobackground = get_bool_opt(options, 'nobackground', False)
self.lineseparator = options.get('lineseparator', '\n')
self.lineanchors = options.get('lineanchors', '')
self.linespans = options.get('linespans', '')
self.anchorlinenos = get_bool_opt(options, 'anchorlinenos', False)
self.hl_lines = set()
for lineno in get_list_opt(options, 'hl_lines', []):
try:
self.hl_lines.add(int(lineno))
except ValueError:
pass
self._create_stylesheet()
def _get_css_class(self, ttype):
"""Return the css class of this token type prefixed with
the classprefix option."""
ttypeclass = _get_ttype_class(ttype)
if ttypeclass:
return self.classprefix + ttypeclass
return ''
def _get_css_classes(self, ttype):
"""Return the CSS classes of this token type prefixed with the classprefix option."""
cls = self._get_css_class(ttype)
while ttype not in STANDARD_TYPES:
ttype = ttype.parent
cls = self._get_css_class(ttype) + ' ' + cls
return cls or ''
def _get_css_inline_styles(self, ttype):
"""Return the inline CSS styles for this token type."""
cclass = self.ttype2class.get(ttype)
while cclass is None:
ttype = ttype.parent
cclass = self.ttype2class.get(ttype)
return cclass or ''
def _create_stylesheet(self):
t2c = self.ttype2class = {Token: ''}
c2s = self.class2style = {}
for ttype, ndef in self.style:
name = self._get_css_class(ttype)
style = ''
if ndef['color']:
style += 'color: {}; '.format(webify(ndef['color']))
if ndef['bold']:
style += 'font-weight: bold; '
if ndef['italic']:
style += 'font-style: italic; '
if ndef['underline']:
style += 'text-decoration: underline; '
if ndef['bgcolor']:
style += 'background-color: {}; '.format(webify(ndef['bgcolor']))
if ndef['border']:
style += 'border: 1px solid {}; '.format(webify(ndef['border']))
if style:
t2c[ttype] = name
# save len(ttype) to enable ordering the styles by
# hierarchy (necessary for CSS cascading rules!)
c2s[name] = (style[:-2], ttype, len(ttype))
def get_style_defs(self, arg=None):
"""
Return CSS style definitions for the classes produced by the current
highlighting style. ``arg`` can be a string or list of selectors to
insert before the token type classes.
"""
style_lines = []
style_lines.extend(self.get_linenos_style_defs())
style_lines.extend(self.get_background_style_defs(arg))
style_lines.extend(self.get_token_style_defs(arg))
return '\n'.join(style_lines)
def get_token_style_defs(self, arg=None):
prefix = self.get_css_prefix(arg)
styles = [
(level, ttype, cls, style)
for cls, (style, ttype, level) in self.class2style.items()
if cls and style
]
styles.sort()
lines = [
f'{prefix(cls)} {{ {style} }} /* {repr(ttype)[6:]} */'
for (level, ttype, cls, style) in styles
]
return lines
def get_background_style_defs(self, arg=None):
prefix = self.get_css_prefix(arg)
bg_color = self.style.background_color
hl_color = self.style.highlight_color
lines = []
if arg and not self.nobackground and bg_color is not None:
text_style = ''
if Text in self.ttype2class:
text_style = ' ' + self.class2style[self.ttype2class[Text]][0]
lines.insert(
0, '{}{{ background: {};{} }}'.format(
prefix(''), bg_color, text_style
)
)
if hl_color is not None:
lines.insert(
0, '{} {{ background-color: {} }}'.format(prefix('hll'), hl_color)
)
return lines
def get_linenos_style_defs(self):
lines = [
f'pre {{ {self._pre_style} }}',
f'td.linenos .normal {{ {self._linenos_style} }}',
f'span.linenos {{ {self._linenos_style} }}',
f'td.linenos .special {{ {self._linenos_special_style} }}',
f'span.linenos.special {{ {self._linenos_special_style} }}',
]
return lines
def get_css_prefix(self, arg):
if arg is None:
arg = ('cssclass' in self.options and '.'+self.cssclass or '')
if isinstance(arg, str):
args = [arg]
else:
args = list(arg)
def prefix(cls):
if cls:
cls = '.' + cls
tmp = []
for arg in args:
tmp.append((arg and arg + ' ' or '') + cls)
return ', '.join(tmp)
return prefix
@property
def _pre_style(self):
return 'line-height: 125%;'
@property
def _linenos_style(self):
color = self.style.line_number_color
background_color = self.style.line_number_background_color
return f'color: {color}; background-color: {background_color}; padding-left: 5px; padding-right: 5px;'
@property
def _linenos_special_style(self):
color = self.style.line_number_special_color
background_color = self.style.line_number_special_background_color
return f'color: {color}; background-color: {background_color}; padding-left: 5px; padding-right: 5px;'
def _decodeifneeded(self, value):
if isinstance(value, bytes):
if self.encoding:
return value.decode(self.encoding)
return value.decode()
return value
def _wrap_full(self, inner, outfile):
if self.cssfile:
if os.path.isabs(self.cssfile):
# it's an absolute filename
cssfilename = self.cssfile
else:
try:
filename = outfile.name
if not filename or filename[0] == '<':
# pseudo files, e.g. name == '<fdopen>'
raise AttributeError
cssfilename = os.path.join(os.path.dirname(filename),
self.cssfile)
except AttributeError:
print('Note: Cannot determine output file name, '
'using current directory as base for the CSS file name',
file=sys.stderr)
cssfilename = self.cssfile
# write CSS file only if noclobber_cssfile isn't given as an option.
try:
if not os.path.exists(cssfilename) or not self.noclobber_cssfile:
with open(cssfilename, "w", encoding="utf-8") as cf:
cf.write(CSSFILE_TEMPLATE %
{'styledefs': self.get_style_defs('body')})
except OSError as err:
err.strerror = 'Error writing CSS file: ' + err.strerror
raise
yield 0, (DOC_HEADER_EXTERNALCSS %
dict(title=self.title,
cssfile=self.cssfile,
encoding=self.encoding))
else:
yield 0, (DOC_HEADER %
dict(title=self.title,
styledefs=self.get_style_defs('body'),
encoding=self.encoding))
yield from inner
yield 0, DOC_FOOTER
def _wrap_tablelinenos(self, inner):
dummyoutfile = StringIO()
lncount = 0
for t, line in inner:
if t:
lncount += 1
dummyoutfile.write(line)
fl = self.linenostart
mw = len(str(lncount + fl - 1))
sp = self.linenospecial
st = self.linenostep
anchor_name = self.lineanchors or self.linespans
aln = self.anchorlinenos
nocls = self.noclasses
lines = []
for i in range(fl, fl+lncount):
print_line = i % st == 0
special_line = sp and i % sp == 0
if print_line:
line = '%*d' % (mw, i)
if aln:
line = '<a href="#%s-%d">%s</a>' % (anchor_name, i, line)
else:
line = ' ' * mw
if nocls:
if special_line:
style = f' style="{self._linenos_special_style}"'
else:
style = f' style="{self._linenos_style}"'
else:
if special_line:
style = ' class="special"'
else:
style = ' class="normal"'
if style:
line = f'<span{style}>{line}</span>'
lines.append(line)
ls = '\n'.join(lines)
# If a filename was specified, we can't put it into the code table as it
# would misalign the line numbers. Hence we emit a separate row for it.
filename_tr = ""
if self.filename:
filename_tr = (
'<tr><th colspan="2" class="filename">'
'<span class="filename">' + self.filename + '</span>'
'</th></tr>')
# in case you wonder about the seemingly redundant <div> here: since the
# content in the other cell also is wrapped in a div, some browsers in
# some configurations seem to mess up the formatting...
yield 0, (f'<table class="{self.cssclass}table">' + filename_tr +
'<tr><td class="linenos"><div class="linenodiv"><pre>' +
ls + '</pre></div></td><td class="code">')
yield 0, '<div>'
yield 0, dummyoutfile.getvalue()
yield 0, '</div>'
yield 0, '</td></tr></table>'
def _wrap_inlinelinenos(self, inner):
# need a list of lines since we need the width of a single number :(
inner_lines = list(inner)
sp = self.linenospecial
st = self.linenostep
num = self.linenostart
mw = len(str(len(inner_lines) + num - 1))
anchor_name = self.lineanchors or self.linespans
aln = self.anchorlinenos
nocls = self.noclasses
for _, inner_line in inner_lines:
print_line = num % st == 0
special_line = sp and num % sp == 0
if print_line:
line = '%*d' % (mw, num)
else:
line = ' ' * mw
if nocls:
if special_line:
style = f' style="{self._linenos_special_style}"'
else:
style = f' style="{self._linenos_style}"'
else:
if special_line:
style = ' class="linenos special"'
else:
style = ' class="linenos"'
if style:
linenos = f'<span{style}>{line}</span>'
else:
linenos = line
if aln:
yield 1, ('<a href="#%s-%d">%s</a>' % (anchor_name, num, linenos) +
inner_line)
else:
yield 1, linenos + inner_line
num += 1
def _wrap_lineanchors(self, inner):
s = self.lineanchors
# subtract 1 since we have to increment i *before* yielding
i = self.linenostart - 1
for t, line in inner:
if t:
i += 1
href = "" if self.linenos else ' href="#%s-%d"' % (s, i)
yield 1, '<a id="%s-%d" name="%s-%d"%s></a>' % (s, i, s, i, href) + line
else:
yield 0, line
def _wrap_linespans(self, inner):
s = self.linespans
i = self.linenostart - 1
for t, line in inner:
if t:
i += 1
yield 1, '<span id="%s-%d">%s</span>' % (s, i, line)
else:
yield 0, line
def _wrap_div(self, inner):
style = []
if (self.noclasses and not self.nobackground and
self.style.background_color is not None):
style.append(f'background: {self.style.background_color}')
if self.cssstyles:
style.append(self.cssstyles)
style = '; '.join(style)
yield 0, ('<div' + (self.cssclass and f' class="{self.cssclass}"') +
(style and (f' style="{style}"')) + '>')
yield from inner
yield 0, '</div>\n'
def _wrap_pre(self, inner):
style = []
if self.prestyles:
style.append(self.prestyles)
if self.noclasses:
style.append(self._pre_style)
style = '; '.join(style)
if self.filename and self.linenos != 1:
yield 0, ('<span class="filename">' + self.filename + '</span>')
# the empty span here is to keep leading empty lines from being
# ignored by HTML parsers
yield 0, ('<pre' + (style and f' style="{style}"') + '><span></span>')
yield from inner
yield 0, '</pre>'
def _wrap_code(self, inner):
yield 0, '<code>'
yield from inner
yield 0, '</code>'
@functools.lru_cache(maxsize=100)
def _translate_parts(self, value):
"""HTML-escape a value and split it by newlines."""
return value.translate(_escape_html_table).split('\n')
def _format_lines(self, tokensource):
"""
Just format the tokens, without any wrapping tags.
Yield individual lines.
"""
nocls = self.noclasses
lsep = self.lineseparator
tagsfile = self.tagsfile
lspan = ''
line = []
for ttype, value in tokensource:
try:
cspan = self.span_element_openers[ttype]
except KeyError:
title = ' title="{}"'.format('.'.join(ttype)) if self.debug_token_types else ''
if nocls:
css_style = self._get_css_inline_styles(ttype)
if css_style:
css_style = self.class2style[css_style][0]
cspan = f'<span style="{css_style}"{title}>'
else:
cspan = ''
else:
css_class = self._get_css_classes(ttype)
if css_class:
cspan = f'<span class="{css_class}"{title}>'
else:
cspan = ''
self.span_element_openers[ttype] = cspan
parts = self._translate_parts(value)
if tagsfile and ttype in Token.Name:
filename, linenumber = self._lookup_ctag(value)
if linenumber:
base, filename = os.path.split(filename)
if base:
base += '/'
filename, extension = os.path.splitext(filename)
url = self.tagurlformat % {'path': base, 'fname': filename,
'fext': extension}
parts[0] = "<a href=\"%s#%s-%d\">%s" % \
(url, self.lineanchors, linenumber, parts[0])
parts[-1] = parts[-1] + "</a>"
# for all but the last line
for part in parts[:-1]:
if line:
# Also check for part being non-empty, so we avoid creating
# empty <span> tags
if lspan != cspan and part:
line.extend(((lspan and '</span>'), cspan, part,
(cspan and '</span>'), lsep))
else: # both are the same, or the current part was empty
line.extend((part, (lspan and '</span>'), lsep))
yield 1, ''.join(line)
line = []
elif part:
yield 1, ''.join((cspan, part, (cspan and '</span>'), lsep))
else:
yield 1, lsep
# for the last line
if line and parts[-1]:
if lspan != cspan:
line.extend(((lspan and '</span>'), cspan, parts[-1]))
lspan = cspan
else:
line.append(parts[-1])
elif parts[-1]:
line = [cspan, parts[-1]]
lspan = cspan
# else we neither have to open a new span nor set lspan
if line:
line.extend(((lspan and '</span>'), lsep))
yield 1, ''.join(line)
def _lookup_ctag(self, token):
entry = ctags.TagEntry()
if self._ctags.find(entry, token.encode(), 0):
return entry['file'].decode(), entry['lineNumber']
else:
return None, None
def _highlight_lines(self, tokensource):
"""
Highlighted the lines specified in the `hl_lines` option by
post-processing the token stream coming from `_format_lines`.
"""
hls = self.hl_lines
for i, (t, value) in enumerate(tokensource):
if t != 1:
yield t, value
if i + 1 in hls: # i + 1 because Python indexes start at 0
if self.noclasses:
style = ''
if self.style.highlight_color is not None:
style = (f' style="background-color: {self.style.highlight_color}"')
yield 1, f'<span{style}>{value}</span>'
else:
yield 1, f'<span class="hll">{value}</span>'
else:
yield 1, value
def wrap(self, source):
"""
Wrap the ``source``, which is a generator yielding
individual lines, in custom generators. See docstring
for `format`. Can be overridden.
"""
output = source
if self.wrapcode:
output = self._wrap_code(output)
output = self._wrap_pre(output)
return output
def format_unencoded(self, tokensource, outfile):
"""
The formatting process uses several nested generators; which of
them are used is determined by the user's options.
Each generator should take at least one argument, ``inner``,
and wrap the pieces of text generated by this.
Always yield 2-tuples: (code, text). If "code" is 1, the text
is part of the original tokensource being highlighted, if it's
0, the text is some piece of wrapping. This makes it possible to
use several different wrappers that process the original source
linewise, e.g. line number generators.
"""
source = self._format_lines(tokensource)
# As a special case, we wrap line numbers before line highlighting
# so the line numbers get wrapped in the highlighting tag.
if not self.nowrap and self.linenos == 2:
source = self._wrap_inlinelinenos(source)
if self.hl_lines:
source = self._highlight_lines(source)
if not self.nowrap:
if self.lineanchors:
source = self._wrap_lineanchors(source)
if self.linespans:
source = self._wrap_linespans(source)
source = self.wrap(source)
if self.linenos == 1:
source = self._wrap_tablelinenos(source)
source = self._wrap_div(source)
if self.full:
source = self._wrap_full(source, outfile)
for t, piece in source:
outfile.write(piece)