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codehilite

CodeHilite Extension for Python-Markdown.

Adds code/syntax highlighting to standard Python-Markdown code blocks.

See https://pythonhosted.org/Markdown/extensions/code_hilite.html for documentation.

Original code Copyright 2006-2008 Waylan Limberg.

All changes Copyright 2008-2014 The Python Markdown Project

License: BSD

Attributes

pygments = True module-attribute

Classes

CodeHilite(src=None, linenums=None, guess_lang=True, css_class='codehilite', lang=None, style='default', noclasses=False, tab_length=4, hl_lines=None, use_pygments=True)

Bases: object

Determine language of source code, and pass it into pygments hilighter.

Basic Usage 
code = CodeHilite(src = 'some text')
html = code.hilite()

  • src: Source string or any object with a .readline attribute.

  • linenums: (Boolean) Set line numbering to 'on' (True), 'off' (False) or 'auto'(None). Set to 'auto' by default.

  • guess_lang: (Boolean) Turn language auto-detection 'on' or 'off' (on by default).

  • css_class: Set class name of wrapper div ('codehilite' by default).

  • hl_lines: (List of integers) Lines to emphasize, 1-indexed.

Low Level Usage 
code = CodeHilite()
code.src = 'some text' # String or anything with a .readline attr.
code.linenos = True  # Turns line numbering on or of.
html = code.hilite()
Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def __init__(self, src=None, linenums=None, guess_lang=True,
             css_class="codehilite", lang=None, style='default',
             noclasses=False, tab_length=4, hl_lines=None, use_pygments=True):
    self.src = src
    self.lang = lang
    self.linenums = linenums
    self.guess_lang = guess_lang
    self.css_class = css_class
    self.style = style
    self.noclasses = noclasses
    self.tab_length = tab_length
    self.hl_lines = hl_lines or []
    self.use_pygments = use_pygments

Attributes

src = src instance-attribute
lang = lang instance-attribute
linenums = linenums instance-attribute
guess_lang = guess_lang instance-attribute
css_class = css_class instance-attribute
style = style instance-attribute
noclasses = noclasses instance-attribute
tab_length = tab_length instance-attribute
hl_lines = hl_lines or [] instance-attribute
use_pygments = use_pygments instance-attribute

Functions

hilite()

Highlites the code.

Pass code to the Pygments highliter with optional line numbers. The output should then be styled with css to your liking. No styles are applied by default - only styling hooks (i.e.: ).

Returns:

Type Description
str

html text of the highlighted code.
Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def hilite(self):
    """Highlites the code.

    Pass code to the [Pygments](http://pygments.pocoo.org/) highliter with
    optional line numbers. The output should then be styled with css to
    your liking. No styles are applied by default - only styling hooks
    (i.e.: <span class="k">).

    Returns:
        (str): html text of the highlighted code.
    """
    self.src = self.src.strip('\n')

    if self.lang is None:
        self._parseHeader()

    if pygments and self.use_pygments:
        try:
            lexer = get_lexer_by_name(self.lang)
        except ValueError:
            try:
                if self.guess_lang:
                    lexer = guess_lexer(self.src)
                else:
                    lexer = get_lexer_by_name('text')
            except ValueError:
                lexer = get_lexer_by_name('text')
        formatter = get_formatter_by_name('html',
                                          linenos=self.linenums,
                                          cssclass=self.css_class,
                                          style=self.style,
                                          noclasses=self.noclasses,
                                          hl_lines=self.hl_lines)
        return highlight(self.src, lexer, formatter)
    else:
        # just escape and build markup usable by JS highlighting libs
        txt = self.src.replace('&', '&amp;')
        txt = txt.replace('<', '&lt;')
        txt = txt.replace('>', '&gt;')
        txt = txt.replace('"', '&quot;')
        classes = []
        if self.lang:
            classes.append('language-%s' % self.lang)
        if self.linenums:
            classes.append('linenums')
        class_str = ''
        if classes:
            class_str = ' class="%s"' % ' '.join(classes)
        return '<pre class="%s"><code%s>%s</code></pre>\n' % \
               (self.css_class, class_str, txt)

HiliteTreeprocessor(markdown_instance=None)

Bases: Treeprocessor

Hilight source code in code blocks.

Source code in pyrevitlib/pyrevit/coreutils/markdown/util.py 
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def __init__(self, markdown_instance=None):
    if markdown_instance:
        self.markdown = markdown_instance

Attributes

markdown = markdown_instance instance-attribute

Functions

run(root)

Find code blocks and store in htmlStash.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def run(self, root):
    """Find code blocks and store in htmlStash."""
    blocks = root.iter('pre')
    for block in blocks:
        if len(block) == 1 and block[0].tag == 'code':
            code = CodeHilite(
                block[0].text,
                linenums=self.config['linenums'],
                guess_lang=self.config['guess_lang'],
                css_class=self.config['css_class'],
                style=self.config['pygments_style'],
                noclasses=self.config['noclasses'],
                tab_length=self.markdown.tab_length,
                use_pygments=self.config['use_pygments']
            )
            placeholder = self.markdown.htmlStash.store(code.hilite(),
                                                        safe=True)
            # Clear codeblock in etree instance
            block.clear()
            # Change to p element which will later
            # be removed when inserting raw html
            block.tag = 'p'
            block.text = placeholder

CodeHiliteExtension(*args, **kwargs)

Bases: Extension

Add source code hilighting to markdown codeblocks.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def __init__(self, *args, **kwargs):
    # define default configs
    self.config = {
        'linenums': [None,
                     "Use lines numbers. True=yes, False=no, None=auto"],
        'guess_lang': [True,
                       "Automatic language detection - Default: True"],
        'css_class': ["codehilite",
                      "Set class name for wrapper <div> - "
                      "Default: codehilite"],
        'pygments_style': ['default',
                           'Pygments HTML Formatter Style '
                           '(Colorscheme) - Default: default'],
        'noclasses': [False,
                      'Use inline styles instead of CSS classes - '
                      'Default false'],
        'use_pygments': [True,
                         'Use Pygments to Highlight code blocks. '
                         'Disable if using a JavaScript library. '
                         'Default: True']
        }

    super(CodeHiliteExtension, self).__init__(*args, **kwargs)

Attributes

config = {'linenums': [None, 'Use lines numbers. True=yes, False=no, None=auto'], 'guess_lang': [True, 'Automatic language detection - Default: True'], 'css_class': ['codehilite', 'Set class name for wrapper <div> - Default: codehilite'], 'pygments_style': ['default', 'Pygments HTML Formatter Style (Colorscheme) - Default: default'], 'noclasses': [False, 'Use inline styles instead of CSS classes - Default false'], 'use_pygments': [True, 'Use Pygments to Highlight code blocks. Disable if using a JavaScript library. Default: True']} instance-attribute

Functions

getConfig(key, default='')

Return a setting for the given key or an empty string.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/__init__.py 
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def getConfig(self, key, default=''):
    """Return a setting for the given key or an empty string."""
    if key in self.config:
        return self.config[key][0]
    else:
        return default
getConfigs()

Return all configs settings as a dict.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/__init__.py 
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def getConfigs(self):
    """Return all configs settings as a dict."""
    return dict([(key, self.getConfig(key)) for key in self.config.keys()])
getConfigInfo()

Return all config descriptions as a list of tuples.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/__init__.py 
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def getConfigInfo(self):
    """Return all config descriptions as a list of tuples."""
    return [(key, self.config[key][1]) for key in self.config.keys()]
setConfig(key, value)

Set a config setting for key with the given value.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/__init__.py 
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def setConfig(self, key, value):
    """Set a config setting for `key` with the given `value`."""
    if isinstance(self.config[key][0], bool):
        value = parseBoolValue(value)
    if self.config[key][0] is None:
        value = parseBoolValue(value, preserve_none=True)
    self.config[key][0] = value
setConfigs(items)

Set multiple config settings given a dict or list of tuples.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/__init__.py 
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def setConfigs(self, items):
    """Set multiple config settings given a dict or list of tuples."""
    if hasattr(items, 'items'):
        # it's a dict
        items = items.items()
    for key, value in items:
        self.setConfig(key, value)
extendMarkdown(md, md_globals)

Add HilitePostprocessor to Markdown instance.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def extendMarkdown(self, md, md_globals):
    """Add HilitePostprocessor to Markdown instance."""
    hiliter = HiliteTreeprocessor(md)
    hiliter.config = self.getConfigs()
    md.treeprocessors.add("hilite", hiliter, "<inline")

    md.registerExtension(self)

Functions

parse_hl_lines(expr)

Support our syntax for emphasizing certain lines of code.

expr should be like '1 2' to emphasize lines 1 and 2 of a code block. Returns a list of ints, the line numbers to emphasize.

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def parse_hl_lines(expr):
    """Support our syntax for emphasizing certain lines of code.

    expr should be like '1 2' to emphasize lines 1 and 2 of a code block.
    Returns a list of ints, the line numbers to emphasize.
    """
    if not expr:
        return []

    try:
        return list(map(int, expr.split()))
    except ValueError:
        return []

makeExtension(*args, **kwargs)

Source code in pyrevitlib/pyrevit/coreutils/markdown/extensions/codehilite.py 
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def makeExtension(*args, **kwargs):
    return CodeHiliteExtension(*args, **kwargs)