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Plugin.php
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Plugin.php
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<?php
/**
* 使用更高效的 ParsedownExtra 解析器替换 Typecho 内置的 Markdown 解析器
*
* @package ParsedownExtra
* @author Gold John King
* @version 1.0
* @link https://github.com/GoldJohnKing/ParsedownExtra-for-Typecho
*/
class ParsedownExtra_Plugin implements Typecho_Plugin_Interface
{
/**
* 激活插件
*/
public static function activate()
{
Typecho_Plugin::factory('Widget_Abstract_Contents')->markdown = array('ParsedownExtra_Plugin', 'markdown');
Typecho_Plugin::factory('Widget_Abstract_Comments')->markdown = array('ParsedownExtra_Plugin', 'markdown');
}
/**
* 禁用插件
*/
public static function deactivate()
{}
/**
* 插件设置
*/
public static function config(Typecho_Widget_Helper_Form $form)
{}
public static function personalConfig(Typecho_Widget_Helper_Form $form)
{}
public static function markdown($text)
{
require_once dirname(__FILE__) . '/Parsedown.php';
require_once dirname(__FILE__) . '/ParsedownExtra.php';
$content ParsedownExtra::instance()
->setBreaksEnabled(true)
->text($text);
return preg_match('#^<p> *\[TOC\]\s*</p>$#m', $content) ? self::buildToc($content) : $content;
}
/**
* 增加TOC支持
* 代码参考自mrgeneralgoo：https://github.com/mrgeneralgoo/typecho-markdown
*/
public static function buildToc($content)
{
$document = new \DOMDocument();
$contentType = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
$htmlStart = '<html><head><meta charset="UTF-8"></head><body>';
$htmlEnd = '</body></html>';
$document->loadHTML($contentType . $htmlStart . $content . $htmlEnd, LIBXML_COMPACT);
$xpath = new \DOMXPath($document);
$elements = $xpath->query('//h1|//h2|//h3|//h4|//h5|//h6');
if ($elements->length === 0) {
return $content;
}
$tocContent = '';
$lastPosition = 0;
foreach ($elements as $element) {
sscanf($element->tagName, 'h%d', $currentPosition);
if ($currentPosition > $lastPosition) {
// parents start
$tocContent .= '<ul>' . PHP_EOL;
} elseif ($currentPosition < $lastPosition) {
// Must have brother if style of title is right
// brother's grandchild end
// brother's child end
// brother end
$tocContent .= '</li></ul></li>' . PHP_EOL;
} else {
// brother end
$tocContent .= '</li>' . PHP_EOL;
}
if ($element->hasAttribute('id')) {
$id = $element->getAttribute('id');
} else {
$id = md5($element->textContent);
$element->setAttribute('id', $id);
}
// child start
$tocContent .= '<li><a href="#' . $id . '">' . $element->textContent . '</a>' . PHP_EOL;
$lastPosition = $currentPosition;
}
// child end and parents end
$tocContent .= '</li></ul>';
return preg_replace(['#^<p> *\[TOC\]\s*</p>$#m', "#$contentType#", "#$htmlStart#", "#$htmlEnd#"], [$tocContent], $xpath->document->saveHTML());
}
}