The Markdown filter allows you to enter content using Markdown, a simple plain-text syntax that is transformed into valid XHTML.');
break;
}
}
/**
* Implementation of hook_filter().
*/
function markdown_filter($op, $delta = 0, $format = -1, $text = '') {
switch ($op) {
case 'list':
return array(t('Markdown'));
case 'description':
return t('Allows content to be submitted using Markdown, a simple plain-text syntax that is filtered into valid XHTML.');
case 'settings':
return _markdown_settings($format);
case 'process':
return _markdown_process($text, $format);
default:
return $text;
}
}
/**
* Implementation of hook_block().
*
* Provides help for markdown syntax.
*/
function markdown_block($op = 'list', $delta = 0, $edit = array()) {
switch($op) {
case 'list':
return array('help' => array('info' => t('Markdown filter tips')));
case 'view':
switch($delta) {
case 'help':
return array(
'subject' => t('Markdown filter tips'),
'content' => _markdown_help_block()
);
}
}
}
/**
* Implementation of hook_filter_tips().
*/
function markdown_filter_tips($delta = 0, $format = -1, $long) {
if ($long) {
return t('Quick Tips:
- Two or more spaces at a line\'s end = Line break
- Double returns = Paragraph
- *Single asterisks* or _single underscores_ = Emphasis
- **Double** or __double__ = Strong
- This is [a link](http://the.link.example.com "The optional title text")
For complete details on the Markdown syntax, see the Markdown documentation and Markdown Extra documentation for tables, footnotes, and more.');
}
else {
return t('You can use Markdown syntax to format and style the text. Also see Markdown Extra for tables, footnotes, and more.', array('@filter_tips' => url('filter/tips'), '@markdown_extra' => 'http://michelf.com/projects/php-markdown/extra/'));
}
}
// == Internal functions =======================================================
/**
* Provides content for the markdown help block.
*/
function _markdown_help_block(){
return ''. t("
## Header 2 ##
### Header 3 ###
#### Header 4 ####
##### Header 5 #####
(Hashes on right are optional)
Link [Drupal](http://drupal.org)
Inline markup like _italics_,
**bold**, and `code()`.
> Blockquote. Like email replies
>> And, they can be nested
* Bullet lists are easy too
- Another one
+ Another one
1. A numbered list
2. Which is numbered
3. With periods and a space
And now some code:
// Code is indented text
is_easy() to_remember();") .'';
}
/**
* Filter process callback.
*/
function _markdown_process($text, $format) {
if (!empty($text)) {
include_once drupal_get_path('module', 'markdown') .'/markdown.php';
$text = Markdown($text);
}
return $text;
}
/**
* Filter settings callback. Just provides a version overview.
*/
function _markdown_settings($format) {
include_once drupal_get_path('module', 'markdown') .'/markdown.php';
$form['markdown_wrapper'] = array(
'#type' => 'fieldset',
'#title' => t('Markdown'),
);
$links = array(
'Markdown PHP Version: '. MARKDOWN_VERSION .'',
'Markdown Extra Version: '. MARKDOWNEXTRA_VERSION .'',
);
$form['markdown_wrapper']['markdown_status'] = array(
'#title' => t('Versions'),
'#type' => 'item',
'#value' => theme('item_list', $links),
);
return $form;
}