Pepperminty-Wiki/modules/parser-default.php

166 lines
7.7 KiB
PHP

<?php
register_module([
"name" => "Old Default Parser",
"version" => "0.9",
"author" => "Johnny Broadway & Starbeamrainbowlabs",
"description" => "The *old* default parser for Pepperminty Wiki. Based on Johnny Broadway's Slimdown (with more than a few modifications). This parser's features are documented in the help page. Superceded by a customised extension of parsedown extra.",
"id" => "parser-default-old",
"optional" => true,
"code" => function() {
global $settings;
add_parser("default", function($markdown) {
return Slimdown::render($markdown);
});
// Register the help section
if($settings->parser != "default")
return; // Don't register the help section if we aren't the currently set parser.
add_help_section("20-parser-default", "Editor Syntax", "<p>$settings->sitename's editor uses a modified version of slimdown, a flavour of markdown that is implementated using regular expressions. See the credits page for more information and links to the original source for this. A quick reference can be found below:</p>
<table>
<tr><th>Type This</th><th>To get this</th>
<tr><td><code>_italics_</code></td><td><em>italics</em></td></tr>
<tr><td><code>*bold*</code></td><td><strong>bold</strong></td></tr>
<tr><td><code>~~Strikethrough~~</code></td><td><del>Strikethough</del></td></tr>
<tr><td><code>`code`</code></td><td><code>code</code></td></tr>
<tr><td><code># Heading</code></td><td><h2>Heading</h2></td></tr>
<tr><td><code>## Sub Heading</code></td><td><h3>Sub Heading</h3></td></tr>
<tr><td><code>[[Internal Link]]</code></td><td><a href='index.php?page=Internal Link'>Internal Link</a></td></tr>
<tr><td><code>[[Display Text|Internal Link]]</code></td><td><a href='index.php?page=Internal Link'>Display Text</a></td></tr>
<tr><td><code>[Display text](//google.com/)</code></td><td><a href='//google.com/'>Display Text</a></td></tr>
<tr><td><code>&gt; Blockquote<br />&gt; Some text</code></td><td><blockquote> Blockquote<br />Some text</td></tr>
<tr><td><code> - Apples<br /> * Oranges</code></td><td><ul><li>Apples</li><li>Oranges</li></ul></td></tr>
<tr><td><code>1. This is<br />2. an ordered list</code></td><td><ol><li>This is</li><li>an ordered list</li></ol></td></tr>
<tr><td><code>
---
</code></td><td><hr /></td></tr>
<!--<tr><tds><code> - One
- Two
- Three</code></td><td><ul><li>One</li><li>Two</li><li>Three</li></ul></td></tr>-->
<tr><td><code>![Alt text](//starbeamrainbowlabs.com/favicon-small.png)</code></td><td><img src='//starbeamrainbowlabs.com/favicon-small.png' alt='Alt text' /></td></code>
</table>
<p>In addition, the following extra syntax is supported for images:</p>
<pre><code>Size the image to at most 250 pixels wide:
![Alt text](//starbeamrainbowlabs.com/favicon-small.png 250px)
Size the image to at most 120px wide and have it float at the right ahnd size of the page:
![Alt text](//starbeamrainbowlabs.com/favicon-small.png 120px right)</code></pre>");
}
]);
/***********************************************************************
* ███████ ██ ██ ███ ███ ██████ ██████ ██ ██ ███ ██ *
* ██ ██ ██ ████ ████ ██ ██ ██ ██ ██ ██ ████ ██ *
* ███████ ██ ██ ██ ████ ██ ██ ██ ██ ██ ██ █ ██ ██ ██ ██ *
* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ███ ██ ██ ██ ██ *
* ███████ ███████ ██ ██ ██ ██████ ██████ ███ ███ ██ ████ *
***********************************************************************/
/**
* Slimdown - A very basic regex-based Markdown parser. Supports the
* following elements (and can be extended via Slimdown::add_rule()):
*
* - Headers
* - Links
* - Bold
* - Emphasis
* - Deletions
* - Quotes
* - Inline code
* - Blockquotes
* - Ordered/unordered lists
* - Horizontal rules
*
* Author: Johnny Broadway <johnny@johnnybroadway.com>
* Website: https://gist.github.com/jbroadway/2836900
* License: MIT
*/
/**
* Modified by Starbeamrainbowlabs (starbeamrainbowlabs)
*
* Changed bold to use single asterisks
* Changed italics to use single underscores
* Added one to add the heading levels (no <h1> tags allowed)
* Added wiki style internal link parsing
* Added wiki style internal link parsing with display text
* Added image support
*/
class Slimdown {
public static $rules = array (
'/\r\n/' => "\n", // new line normalisation
'/^(#+)(.*)/' => 'self::header', // headers
'/(\*+)(.*?)\1/' => '<strong>\2</strong>', // bold
'/(_)(.*?)\1/' => '<em>\2</em>', // emphasis
'/!\[(.*)\]\(([^\s]+)\s(\d+.+)\s(left|right)\)/' => '<img src="\2" alt="\1" style="max-width: \3; float: \4;" />', // images with size
'/!\[(.*)\]\(([^\s]+)\s(\d+.+)\)/' => '<img src="\2" alt="\1" style="max-width: \3;" />', // images with size
'/!\[(.*)\]\((.*)\)/' => '<img src="\2" alt="\1" />', // basic images
'/\[\[([a-zA-Z0-9\_\- ]+)\|([a-zA-Z0-9\_\- ]+)\]\]/' => '<a href=\'index.php?page=\1\'>\2</a>', //internal links with display text
'/\[\[([a-zA-Z0-9\_\- ]+)\]\]/' => '<a href=\'index.php?page=\1\'>\1</a>', //internal links
'/\[([^\[]+)\]\(([^\)]+)\)/' => '<a href=\'\2\' target=\'_blank\'>\1</a>', // links
'/\~\~(.*?)\~\~/' => '<del>\1</del>', // del
'/\:\"(.*?)\"\:/' => '<q>\1</q>', // quote
'/`(.*?)`/' => '<code>\1</code>', // inline code
'/\n\s*(\*|-)(.*)/' => 'self::ul_list', // ul lists
'/\n[0-9]+\.(.*)/' => 'self::ol_list', // ol lists
'/\n(&gt;|\>)(.*)/' => 'self::blockquote', // blockquotes
'/\n-{3,}/' => "\n<hr />", // horizontal rule
'/\n([^\n]+)\n\n/' => 'self::para', // add paragraphs
'/<\/ul>\s?<ul>/' => '', // fix extra ul
'/<\/ol>\s?<ol>/' => '', // fix extra ol
'/<\/blockquote><blockquote>/' => "\n" // fix extra blockquote
);
private static function para ($regs) {
$line = $regs[1];
$trimmed = trim ($line);
if (preg_match ('/^<\/?(ul|ol|li|h|p|bl)/', $trimmed)) {
return "\n" . $line . "\n";
}
return sprintf ("\n<p>%s</p>\n", $trimmed);
}
private static function ul_list ($regs) {
$item = $regs[2];
return sprintf ("\n<ul>\n\t<li>%s</li>\n</ul>", trim($item));
}
private static function ol_list ($regs) {
$item = $regs[1];
return sprintf ("\n<ol>\n\t<li>%s</li>\n</ol>", trim($item));
}
private static function blockquote ($regs) {
$item = $regs[2];
return sprintf ("\n<blockquote>%s</blockquote>", trim($item));
}
private static function header ($regs) {
list ($tmp, $chars, $header) = $regs;
$level = strlen ($chars);
return sprintf ('<h%d>%s</h%d>', $level + 1, trim($header), $level + 1);
}
/**
* Add a rule.
*/
public static function add_rule ($regex, $replacement) {
self::$rules[$regex] = $replacement;
}
/**
* Render some Markdown into HTML.
*/
public static function render ($text) {
foreach (self::$rules as $regex => $replacement) {
if (is_callable ( $replacement)) {
$text = preg_replace_callback ($regex, $replacement, $text);
} else {
$text = preg_replace ($regex, $replacement, $text);
}
}
return trim ($text);
}
}
////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////
?>