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260 lines
7.2 KiB
260 lines
7.2 KiB
4 years ago
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Mistune
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=======
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The fastest markdown parser in pure Python with renderer features,
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inspired by marked_.
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.. image:: https://img.shields.io/badge/donate-lepture-green.svg
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:target: https://lepture.com/donate
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:alt: Donate lepture
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.. image:: https://img.shields.io/pypi/wheel/mistune.svg?style=flat
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:target: https://pypi.python.org/pypi/mistune/
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:alt: Wheel Status
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.. image:: https://anaconda.org/conda-forge/mistune/badges/version.svg
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:target: https://anaconda.org/conda-forge/mistune
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:alt: Conda Version
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.. image:: https://img.shields.io/pypi/v/mistune.svg
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:target: https://pypi.python.org/pypi/mistune/
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:alt: Latest Version
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.. image:: https://travis-ci.org/lepture/mistune.svg?branch=master
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:target: https://travis-ci.org/lepture/mistune
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:alt: Travis CI Status
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.. image:: https://coveralls.io/repos/lepture/mistune/badge.svg?branch=master
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:target: https://coveralls.io/r/lepture/mistune
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:alt: Coverage Status
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.. image:: https://ci.appveyor.com/api/projects/status/8ai8tfwp75oela17?svg=true
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:target: https://ci.appveyor.com/project/lepture/mistune
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:alt: App Veyor CI Status
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.. _marked: https://github.com/chjj/marked
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Features
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--------
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* **Pure Python**. Tested in Python 2.7, Python 3.5+ and PyPy.
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* **Very Fast**. It is the fastest in all **pure Python** markdown parsers.
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* **More Features**. Table, footnotes, autolink, fenced code etc.
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View the `benchmark results <https://github.com/lepture/mistune/issues/1>`_.
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Installation
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------------
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Installing mistune with pip::
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$ pip install mistune
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Mistune can be faster, if you compile with cython::
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$ pip install cython mistune
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Basic Usage
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-----------
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A simple API that render a markdown formatted text:
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.. code:: python
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import mistune
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mistune.markdown('I am using **mistune markdown parser**')
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# output: <p>I am using <strong>mistune markdown parser</strong></p>
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If you care about performance, it is better to re-use the Markdown instance:
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.. code:: python
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import mistune
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markdown = mistune.Markdown()
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markdown('I am using **mistune markdown parser**')
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Mistune has enabled all features by default. You don't have to configure
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anything. But there are options for you to change the parser behaviors.
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Options
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-------
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Here is a list of all options that will affect the rendering results,
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configure them with ``mistune.Renderer``:
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.. code:: python
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renderer = mistune.Renderer(escape=True, hard_wrap=True)
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# use this renderer instance
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markdown = mistune.Markdown(renderer=renderer)
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markdown(text)
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* **escape**: if set to *False*, all raw html tags will not be escaped.
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* **hard_wrap**: if set to *True*, it will has GFM line breaks feature.
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All new lines will be replaced with ``<br>`` tag
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* **use_xhtml**: if set to *True*, all tags will be in xhtml, for example: ``<hr />``.
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* **parse_block_html**: parse text only in block level html.
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* **parse_inline_html**: parse text only in inline level html.
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When using the default renderer, you can use one of the following shortcuts::
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mistune.markdown(text, escape=True, hard_wrap=True)
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markdown = mistune.Markdown(escape=True, hard_wrap=True)
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markdown(text)
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Renderer
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--------
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Like misaka/sundown, you can influence the rendering by custom renderers.
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All you need to do is subclassing a `Renderer` class.
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Here is an example of code highlighting:
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.. code:: python
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import mistune
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from pygments import highlight
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from pygments.lexers import get_lexer_by_name
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from pygments.formatters import html
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class HighlightRenderer(mistune.Renderer):
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def block_code(self, code, lang):
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if not lang:
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return '\n<pre><code>%s</code></pre>\n' % \
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mistune.escape(code)
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lexer = get_lexer_by_name(lang, stripall=True)
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formatter = html.HtmlFormatter()
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return highlight(code, lexer, formatter)
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renderer = HighlightRenderer()
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markdown = mistune.Markdown(renderer=renderer)
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print(markdown('```python\nassert 1 == 1\n```'))
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Find more renderers in `mistune-contrib`_.
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Block Level
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~~~~~~~~~~~
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Here is a list of block level renderer API::
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block_code(code, language=None)
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block_quote(text)
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block_html(html)
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header(text, level, raw=None)
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hrule()
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list(body, ordered=True)
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list_item(text)
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paragraph(text)
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table(header, body)
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table_row(content)
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table_cell(content, **flags)
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The *flags* tells you whether it is header with ``flags['header']``. And it
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also tells you the align with ``flags['align']``.
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Span Level
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~~~~~~~~~~
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Here is a list of span level renderer API::
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autolink(link, is_email=False)
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codespan(text)
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double_emphasis(text)
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emphasis(text)
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image(src, title, alt_text)
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linebreak()
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newline()
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link(link, title, content)
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strikethrough(text)
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text(text)
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inline_html(text)
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Footnotes
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~~~~~~~~~
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Here is a list of renderers related to footnotes::
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footnote_ref(key, index)
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footnote_item(key, text)
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footnotes(text)
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Lexers
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------
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Sometimes you want to add your own rules to Markdown, such as GitHub Wiki
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links. You can't achieve this goal with renderers. You will need to deal
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with the lexers, it would be a little difficult for the first time.
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We will take an example for GitHub Wiki links: ``[[Page 2|Page 2]]``.
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It is an inline grammar, which requires custom ``InlineGrammar`` and
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``InlineLexer``:
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.. code:: python
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import copy,re
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from mistune import Renderer, InlineGrammar, InlineLexer
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class WikiLinkRenderer(Renderer):
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def wiki_link(self, alt, link):
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return '<a href="%s">%s</a>' % (link, alt)
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class WikiLinkInlineLexer(InlineLexer):
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def enable_wiki_link(self):
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# add wiki_link rules
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self.rules.wiki_link = re.compile(
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r'\[\[' # [[
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r'([\s\S]+?\|[\s\S]+?)' # Page 2|Page 2
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r'\]\](?!\])' # ]]
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)
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# Add wiki_link parser to default rules
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# you can insert it some place you like
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# but place matters, maybe 3 is not good
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self.default_rules.insert(3, 'wiki_link')
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def output_wiki_link(self, m):
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text = m.group(1)
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alt, link = text.split('|')
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# you can create an custom render
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# you can also return the html if you like
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return self.renderer.wiki_link(alt, link)
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You should pass the inline lexer to ``Markdown`` parser:
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.. code:: python
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renderer = WikiLinkRenderer()
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inline = WikiLinkInlineLexer(renderer)
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# enable the feature
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inline.enable_wiki_link()
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markdown = Markdown(renderer, inline=inline)
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markdown('[[Link Text|Wiki Link]]')
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It is the same with block level lexer. It would take a while to understand
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the whole mechanism. But you won't do the trick a lot.
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Contribution & Extensions
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-------------------------
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Mistune itself doesn't accept any extension. It will always be a simple one
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file script.
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If you want to add features, you can head over to `mistune-contrib`_.
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Here are some extensions already in `mistune-contrib`_:
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* Math/MathJax features
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* Highlight Code Renderer
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* TOC table of content features
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* MultiMarkdown Metadata parser
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Get inspired with the contrib repository.
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.. _`mistune-contrib`: https://github.com/lepture/mistune-contrib
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