NAME

       markdown - Converts Markdown text to HTML

SYNOPSIS

       package require Tcl  8.5

       package require Markdown  1.2.2

       package require textutil  ?0.8?

       ::Markdown::convert markdown

       ::Markdown::register langspec converter

       ::Markdown::get_lang_counter

       ::Markdown::reset_lang_counter

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DESCRIPTION

       The package Markdown provides a command to convert Markdown annotated text into HMTL.

       ::Markdown::convert markdown
              This command takes in a block of Markdown text, and returns a block of HTML.

              The converter supports two types of syntax highlighting for fenced code blocks: highlighting via a
              registered  converter  (see  ::Markdown::register),  or  pure  JavaScript  highlighting,  e.g. via
              "highlight.js", where the language specifier used in the markup is set as CSS class of the  "code"
              element in the returned markup.

       ::Markdown::register langspec converter
              Register  a  language  specific converter for prettifying a code block (e.g. syntax highlighting).
              Markdown supports fenced code blocks with an optional language specifier (e.g.  "tcl").  When  the
              markdown  parser  processes  such  a  code  block  and  a  converter for the specified langspec is
              registered, the converter is called with the raw code block as argument. The converter is supposed
              to return the markup of the code block as result. The specified converter can be an arbitrary  Tcl
              command, the raw text block is added as last argument upon invocation.

       ::Markdown::get_lang_counter
              Return a dict of language specifier and number of occurrences in fenced code blocks. This function
              can  be  used  e.g.  to  detect,  whether  some  CSS  or JavaScript headers should be included for
              rendering without the need of postprocessing the rendered result.

       ::Markdown::reset_lang_counter
              Reset the language counters.

SUPPORTED MARKDOWN SYNTAX

       This markdown  converter  supports  the  original  markdown  by  Gruber  and  Swartz  (see  their  syntax
       [https://daringfireball.net/projects/markdown/syntax] page for details):

       •      paragraphs

       •      atx- and setext-style headers

       •      blockquotes

       •      emphasis and strong emphasis

       •      unordered and ordered lists

       •      inline-style, reference-style and automatic links

       •      inline- and reference-style images

       •      inline code

       •      code blocks (with four indent spaces or one tab)

       •      inline HTML

       •      backslash escapes

       •      horizontal rules

       In  addition,  the  following extended markdown sytax is supported, taken from PHP Markdown Extra and GFM
       (Github Flavoured Markdown):

       •      pipe tables

       •      fenced code blocks (with an optional language specifier)

BUGS, IDEAS, FEEDBACK

       This document, and the package it describes, will undoubtedly contain bugs and  other  problems.   Please
       report  such  in  the  category  textutil  of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist].
       Please also report any ideas for enhancements you may have for either package and/or documentation.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments  can  be  made  by
       going  to the Edit form of the ticket immediately after its creation, and then using the left-most button
       in the secondary navigation bar.

CATEGORY

       Text processing

tcllib                                                1.2.2                                       markdown(3tcl)