Hoextdown is an extension to Hoedown.

Extended the following functions.

• Special Attributes
• Task Lists
• Line Continue
• Header ID
• Fenced Script
• Script Tags
• Meta Block

Add the HOEDOWN_EXT_SPECIAL_ATTRIBUTE to Hoedown document flags.

Set the id and class attribute on certain elements using an attribute block.

For instance, put the desired id prefixed by a hash inside curly brackets after the header at the end of the line, like this

Header 1            {#header1}
========

## Header 2 ##      {#header2}

Then you can create links to different parts of the same document like this:

[Link back to header 1](#header1)

To add a class name, which can be used as a hook for a style sheet, use a dot like this:

## The Site ##    {.main}

The id and multiple class names can be combined by putting them all into the same special attribute block:

## The Site ##    {.main .shine #the-site}

To add a other than id and class names, use a colon like this:

## The Site ##    {.main .shine #the-site :color=red}

At this time, special attribute blocks can be used with

• headers
• fenced code blocks
• links
• images
• tables

For image and links, put the special attribute block immediately after the parenthesis containing the address:

[link](url){#id .class}
![img](url){#id .class}

Or if using reference-style links and images, put it at the end of the definition line like this:

[link][linkref] or [linkref]
![img][linkref]

[linkref]: url "optional title" {#id .class}

Add the HOEDOWN_HTML_USE_TASK_LIST to Hoedown html flags.

Add to support task lists, Task lists are lists with items marked as either [ ] or [x] (incomplete or complete), like this

- [ ] a task list item
- [ ] list syntax required
- [ ] normal **formatting**, @mentions, #1234 refs
- [ ] incomplete
- [x] completed

Add the HOEDOWN_HTML_LINE_CONTINUE to Hoedown html flags.

Remove the line breaks at the end of the line.

Add the HOEDOWN_HTML_HEADER_ID to Hoedown html flags.

Output header id.

# Header 1

becomes:

<h1 id="header-1">Header 1</h1>

Add the HOEDOWN_HTML_FENCED_CODE_SCRIPT to Hoedown html flags. (HOEDOWN_EXT_FENCED_CODE also need to be specified at the same time)

Output the script tag in the fenced code style.

``` script@text/javascript
alert("Example");
```

becomes:

<script type="text/javascript">
alert("Example");
</script>

Add the HOEDOWN_EXT_SCRIPT_TAGS to Hoedown document flags.

Add the parsing process of script tags <?..?>.

This is <?php echo "an example" ?> test.

<?php
echo "Example";
?>

becomes:

<p>This is <?php echo "an example? ?> test.</p>

<?php
echo "Example";
?>

Add the HOEDOWN_EXT_META_BLOCK to Hoedown document flags.

Add the parsing process of meta block <!--*..*-->.

Get a meta block by running in the following program.

/*
  Allocate meta block buffer
 */
hoedown_buffer *meta;
meta = hoedown_buffer_new(64);

/*
  Set HOEDOWN_EXT_META_BLOCK to hoedown_extensions.
  Specifies the meta block buffer to fifth argument.
 */
document = hoedown_document_new(renderer, HOEDOWN_EXT_META_BLOCK, 6, NULL, meta);

/*
  Print meta block buffer
 */
if (meta->size > 0) {
  fprintf(stdout, "-- Meta Block --\n");
  (void)fwrite(meta->data, 1, meta->size, stdout);
}

hoedown_buffer_free(meta);

Execution parse result.

<!--*
  author: user
  title: Readme markdown parser
*-->

This is hoextdown example.

becomes:

<p>This is hoextdown example.</p>
--- Meta Block --
  author: user
  title: Readme markdown parser