%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* @link https://www.humhub.org/
* @copyright Copyright (c) 2017 HumHub GmbH & Co. KG
* @license https://www.humhub.com/licences
*/
namespace humhub\libs;
use cebe\markdown\block\HeadlineTrait;
use cebe\markdown\Parser;
/**
* MarkdownPreview generates a plain text (no HTML) of markdown.
* Some elements like images or links will be displayed more clearly.
*
* @since 0.11.1
* @deprecated since 1.8 use RichTextToPlainTextConverter isntead
*/
class MarkdownPreview extends Parser
{
use HeadlineTrait;
protected function renderParagraph($block)
{
return $this->renderAbsy($block['content']) . "\n";
}
/**
* Renders a headline
*/
protected function renderHeadline($block)
{
return $this->renderAbsy($block['content']) ."\n";
}
/**
* Parses a link indicated by `[`.
* @marker [
*/
protected function parseLink($markdown)
{
if (!in_array('parseLink', array_slice($this->context, 1)) && ($parts = $this->parseLinkOrImage($markdown)) !== false) {
list($text, $url, $title, $offset, $key) = $parts;
return [
[
'link',
'text' => $this->parseInline($text),
'url' => $url,
'title' => $title,
'refkey' => $key,
'orig' => substr($markdown, 0, $offset),
],
$offset
];
} else {
// remove all starting [ markers to avoid next one to be parsed as link
$result = '[';
$i = 1;
while (isset($markdown[$i]) && $markdown[$i] == '[') {
$result .= '[';
$i++;
}
return [['text', $result], $i];
}
}
/**
*
* @param type $block
* @marker ![
*/
protected function parseImage($markdown)
{
if (($parts = $this->parseLinkOrImage(substr($markdown, 1))) !== false) {
list($text, $url, $title, $offset, $key) = $parts;
return [
[
'image',
'text' => $text,
'url' => $url,
'title' => $title,
'refkey' => $key,
'orig' => substr($markdown, 0, $offset + 1),
],
$offset + 1
];
} else {
// remove all starting [ markers to avoid next one to be parsed as link
$result = '!';
$i = 1;
while (isset($markdown[$i]) && $markdown[$i] == '[') {
$result .= '[';
$i++;
}
return [['text', $result], $i];
}
}
protected function parseLinkOrImage($markdown)
{
if (strpos($markdown, ']') !== false && preg_match('/\[((?>[^\]\[]+|(?R))*)\]/', $markdown, $textMatches)) { // TODO improve bracket regex
$text = $textMatches[1];
$offset = strlen($textMatches[0]);
$markdown = substr($markdown, $offset);
$pattern = <<<REGEXP
/(?(R) # in case of recursion match parentheses
\(((?>[^\s()]+)|(?R))*\)
| # else match a link with title
^\(\s*(((?>[^\s()]+)|(?R))*)(\s+"(.*?)")?\s*\)
)/x
REGEXP;
if (preg_match($pattern, $markdown, $refMatches)) {
// inline link
return [
$text,
isset($refMatches[2]) ? $refMatches[2] : '', // url
empty($refMatches[5]) ? null : $refMatches[5], // title
$offset + strlen($refMatches[0]), // offset
null, // reference key
];
} elseif (preg_match('/^([ \n]?\[(.*?)\])?/s', $markdown, $refMatches)) {
// reference style link
if (empty($refMatches[2])) {
$key = strtolower($text);
} else {
$key = strtolower($refMatches[2]);
}
return [
$text,
null, // url
null, // title
$offset + strlen($refMatches[0]), // offset
$key,
];
}
}
return false;
}
protected function renderLink($block)
{
$result = '';
if (isset($block['text']) && isset($block['text'][0]) && isset($block['text'][0][1])) {
$result = $block['text'][0][1];
}
if (!empty($result) && isset($block['url']) && strrpos($block['url'], 'mention:') === 0) {
$result = '@'.$result;
}
return $result;
}
protected function renderImage($block)
{
return "[" . $block['text'] . "]";
}
}
Zerion Mini Shell 1.0