mirror of
https://github.com/erusev/parsedown.git
synced 2024-09-19 19:41:29 +02:00
1405 lines
30 KiB
PHP
1405 lines
30 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* Parsedown
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* http://parsedown.org
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*
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* (c) Emanuil Rusev
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* http://erusev.com
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*
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* For the full license information, view the LICENSE file that was distributed
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* with this source code.
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*/
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class Parsedown
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{
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public const version = '1.8.0';
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/**
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* @var self[]
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*/
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private static $instances = [];
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/**
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* @var bool
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*/
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protected $breaksEnabled;
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/**
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* @var bool
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*/
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protected $markupEscaped;
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/**
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* @var bool
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*/
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protected $urlsLinked = true;
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/**
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* @var bool
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*/
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protected $safeMode;
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/**
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* @var string[]
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*/
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protected $safeLinksWhitelist = [
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'http://',
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'https://',
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'ftp://',
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'ftps://',
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'mailto:',
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'data:image/png;base64,',
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'data:image/gif;base64,',
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'data:image/jpeg;base64,',
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'irc:',
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'ircs:',
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'git:',
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'ssh:',
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'news:',
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'steam:',
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];
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/**
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* @var string[][]
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*/
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protected $blockTypes = [
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'#' => ['Header'],
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'*' => ['Rule', 'List'],
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'+' => ['List'],
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'-' => ['SetextHeader', 'Table', 'Rule', 'List'],
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'0' => ['List'],
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'1' => ['List'],
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'2' => ['List'],
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'3' => ['List'],
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'4' => ['List'],
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'5' => ['List'],
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'6' => ['List'],
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'7' => ['List'],
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'8' => ['List'],
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'9' => ['List'],
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':' => ['Table'],
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'<' => ['Comment', 'Markup'],
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'=' => ['SetextHeader'],
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'>' => ['Quote'],
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'[' => ['Reference'],
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'_' => ['Rule'],
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'`' => ['FencedCode'],
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'|' => ['Table'],
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'~' => ['FencedCode'],
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];
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/**
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* @var string[]
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*/
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protected $unmarkedBlockTypes = [
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'Code',
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];
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/**
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* @var string[][]
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*/
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protected $inlineTypes = [
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'"' => ['SpecialCharacter'],
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'!' => ['Image'],
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'&' => ['SpecialCharacter'],
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'*' => ['Emphasis'],
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':' => ['Url'],
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'<' => ['UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'],
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'>' => ['SpecialCharacter'],
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'[' => ['Link'],
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'_' => ['Emphasis'],
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'`' => ['Code'],
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'~' => ['Strikethrough'],
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'\\' => ['EscapeSequence'],
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];
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protected $inlineMarkerList = '!"*_&[:<>`~\\';
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protected $DefinitionData;
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protected $specialCharacters = [
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'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|',
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];
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protected $StrongRegex = [
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'*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
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'_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us',
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];
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protected $EmRegex = [
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'*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
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'_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
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];
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protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?';
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protected $voidElements = [
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'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
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];
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protected $textLevelElements = [
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'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
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'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
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'i', 'rp', 'del', 'code', 'strike', 'marquee',
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'q', 'rt', 'ins', 'font', 'strong',
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's', 'tt', 'kbd', 'mark',
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'u', 'xm', 'sub', 'nobr',
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'sup', 'ruby',
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'var', 'span',
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'wbr', 'time',
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];
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/**
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* @param string|null $name
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* @return Parsedown
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*/
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public static function instance(?string $name = null): self
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{
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$name = $name ?? 'default';
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if (isset(self::$instances[$name]) === true) {
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return self::$instances[$name];
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}
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$instance = new static;
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self::$instances[$name] = $instance;
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return $instance;
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}
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protected static function escape(string $text, bool $allowQuotes = false): string
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{
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return htmlspecialchars($text, $allowQuotes ? ENT_NOQUOTES : ENT_QUOTES, 'UTF-8');
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}
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protected static function striAtStart(string $string, string $needle): bool
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{
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if (strlen($needle) > strlen($string)) {
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return false;
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}
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return stripos($string, strtolower($needle)) === 0;
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}
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public function text(string $text): string
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{
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// make sure no definitions are set
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$this->DefinitionData = [];
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// standardize line breaks
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$text = str_replace(["\r\n", "\r"], "\n", $text);
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// remove surrounding line breaks
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$text = trim($text, "\n");
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// split text into lines
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$lines = explode("\n", $text);
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// iterate through lines to identify blocks
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$markup = $this->lines($lines);
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// trim line breaks
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$markup = trim($markup, "\n");
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return $markup;
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}
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public function setBreaksEnabled(bool $breaksEnabled): self
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{
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$this->breaksEnabled = $breaksEnabled;
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return $this;
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}
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public function setMarkupEscaped(bool $markupEscaped): self
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{
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$this->markupEscaped = $markupEscaped;
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return $this;
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}
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public function setUrlsLinked(bool $urlsLinked): self
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{
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$this->urlsLinked = $urlsLinked;
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return $this;
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}
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public function setSafeMode(bool $safeMode): self
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{
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$this->safeMode = $safeMode;
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return $this;
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}
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public function line(string $text, array $nonNestables = []): string
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{
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$markup = '';
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# $excerpt is based on the first occurrence of a marker
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while ($excerpt = strpbrk($text, $this->inlineMarkerList)) {
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$marker = $excerpt[0];
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$markerPosition = strpos($text, $marker);
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$Excerpt = ['text' => $excerpt, 'context' => $text];
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foreach ($this->inlineTypes[$marker] as $inlineType) {
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# check to see if the current inline type is nestable in the current context
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if (!empty($nonNestables) && in_array($inlineType, $nonNestables, true)) {
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continue;
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}
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$inline = $this->{'inline' . $inlineType}($Excerpt);
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if (!isset($inline)) {
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continue;
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}
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# makes sure that the inline belongs to "our" marker
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if (isset($inline['position']) && $inline['position'] > $markerPosition) {
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continue;
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}
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# sets a default inline position
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if (!isset($inline['position'])) {
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$inline['position'] = $markerPosition;
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}
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# cause the new element to 'inherit' our non nestables
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foreach ($nonNestables as $non_nestable) {
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$inline['element']['nonNestables'][] = $non_nestable;
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}
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# the text that comes before the inline
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$unmarkedText = substr($text, 0, $inline['position']);
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# compile the unmarked text
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$markup .= $this->unmarkedText($unmarkedText);
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# compile the inline
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$markup .= $inline['markup'] ?? $this->element($inline['element']);
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# remove the examined text
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$text = substr($text, $inline['position'] + $inline['extent']);
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continue 2;
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}
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# the marker does not belong to an inline
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$unmarkedText = substr($text, 0, $markerPosition + 1);
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$markup .= $this->unmarkedText($unmarkedText);
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$text = substr($text, $markerPosition + 1);
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}
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$markup .= $this->unmarkedText($text);
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return $markup;
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}
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/**
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* Alias for ->text().
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*
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* @param string $haystack
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* @return string
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*/
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public function parse(string $haystack): string
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{
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return $this->text($haystack);
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}
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protected function lines(array $lines): string
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{
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$currentBlock = null;
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foreach ($lines as $line) {
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if (rtrim($line) === '') {
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if (isset($currentBlock)) {
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$currentBlock['interrupted'] = true;
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}
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continue;
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}
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if (strpos($line, "\t") !== false) {
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$parts = explode("\t", $line);
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$line = $parts[0];
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unset($parts[0]);
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foreach ($parts as $part) {
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$shortage = 4 - mb_strlen($line, 'utf-8') % 4;
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$line .= str_repeat(' ', $shortage);
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$line .= $part;
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}
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}
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$indent = 0;
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while (isset($line[$indent]) && $line[$indent] === ' ') {
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$indent++;
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}
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$text = $indent > 0 ? substr($line, $indent) : $line;
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$Line = ['body' => $line, 'indent' => $indent, 'text' => $text];
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if (isset($currentBlock['continuable'])) {
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$block = $this->{'block' . $currentBlock['type'] . 'Continue'}($Line, $currentBlock);
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if (isset($block)) {
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$currentBlock = $block;
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continue;
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}
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if ($this->isBlockCompletable($currentBlock['type'])) {
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$currentBlock = $this->{'block' . $currentBlock['type'] . 'Complete'}($currentBlock);
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}
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}
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# ~
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$marker = $text[0];
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$blockTypes = $this->unmarkedBlockTypes;
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if (isset($this->blockTypes[$marker])) {
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foreach ($this->blockTypes[$marker] as $blockType) {
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$blockTypes[] = $blockType;
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}
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}
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# ~
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foreach ($blockTypes as $blockType) {
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$block = $this->{'block' . $blockType}($Line, $currentBlock);
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if (isset($block)) {
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$block['type'] = $blockType;
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if (!isset($block['identified'])) {
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$blocks[] = $currentBlock;
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$block['identified'] = true;
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}
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if ($this->isBlockContinuable($blockType)) {
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$block['continuable'] = true;
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}
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$currentBlock = $block;
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continue 2;
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}
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}
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# ~
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if (isset($currentBlock) && !isset($currentBlock['type']) && !isset($currentBlock['interrupted'])) {
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$currentBlock['element']['text'] .= "\n" . $text;
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} else {
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$blocks[] = $currentBlock;
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$currentBlock = $this->paragraph($Line);
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$currentBlock['identified'] = true;
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}
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}
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if (isset($currentBlock['continuable']) && $this->isBlockCompletable($currentBlock['type'])) {
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$currentBlock = $this->{'block' . $currentBlock['type'] . 'Complete'}($currentBlock);
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}
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$blocks[] = $currentBlock;
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unset($blocks[0]);
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$markup = '';
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foreach ($blocks as $block) {
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if (isset($block['hidden'])) {
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continue;
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}
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$markup .= "\n";
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$markup .= $block['markup'] ?? $this->element($block['element']);
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}
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$markup .= "\n";
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return $markup;
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}
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protected function isBlockContinuable($type): bool
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{
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return method_exists($this, 'block' . $type . 'Continue');
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}
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protected function isBlockCompletable(string $type): bool
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{
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return method_exists($this, 'block' . $type . 'Complete');
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}
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protected function blockCode(array $Line, ?array $block = null): ?array
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{
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if (isset($block) && !isset($block['type']) && !isset($block['interrupted'])) {
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return null;
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}
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if ($Line['indent'] >= 4) {
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return [
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'element' => [
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'name' => 'pre',
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'handler' => 'element',
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'text' => [
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'name' => 'code',
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'text' => substr($Line['body'], 4),
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],
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],
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];
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}
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return null;
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}
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protected function blockCodeContinue(array $line, array $block): ?array
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{
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if ($line['indent'] >= 4) {
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if (isset($block['interrupted'])) {
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$block['element']['text']['text'] .= "\n";
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unset($block['interrupted']);
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}
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$block['element']['text']['text'] .= "\n";
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$text = substr($line['body'], 4);
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$block['element']['text']['text'] .= $text;
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return $block;
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}
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return null;
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}
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protected function blockCodeComplete(array $block): array
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{
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$text = $block['element']['text']['text'];
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$block['element']['text']['text'] = $text;
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return $block;
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}
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protected function blockComment(array $line): ?array
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{
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if ($this->markupEscaped || $this->safeMode) {
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return null;
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}
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if (isset($line['text'][3]) && $line['text'][3] === '-' && $line['text'][2] === '-' && $line['text'][1] === '!') {
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$block = [
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'markup' => $line['body'],
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];
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if (preg_match('/-->$/', $line['text'])) {
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$block['closed'] = true;
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}
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return $block;
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}
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return null;
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}
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protected function blockCommentContinue(array $line, array $block): ?array
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{
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if (isset($block['closed'])) {
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return null;
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}
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$block['markup'] .= "\n" . $line['body'];
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if (preg_match('/-->$/', $line['text'])) {
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$block['closed'] = true;
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}
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return $block;
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}
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protected function blockFencedCode(array $Line): ?array
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{
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if (preg_match('/^[' . $Line['text'][0] . ']{3,}[ ]*([^`]+)?[ ]*$/', $Line['text'], $matches)) {
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$element = [
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'name' => 'code',
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'text' => '',
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];
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|
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if (isset($matches[1])) {
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/**
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* https://www.w3.org/TR/2011/WD-html5-20110525/elements.html#classes
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* Every HTML element may have a class attribute specified.
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* The attribute, if specified, must have a value that is a set
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* of space-separated tokens representing the various classes
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* that the element belongs to.
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* [...]
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* The space characters, for the purposes of this specification,
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* are U+0020 SPACE, U+0009 CHARACTER TABULATION (tab),
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* U+000A LINE FEED (LF), U+000C FORM FEED (FF), and
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* U+000D CARRIAGE RETURN (CR).
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|
*/
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|
$language = substr($matches[1], 0, strcspn($matches[1], " \t\n\f\r"));
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$class = 'language-' . $language;
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$element['attributes'] = [
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'class' => $class,
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];
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}
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return [
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'char' => $Line['text'][0],
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'element' => [
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'name' => 'pre',
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'handler' => 'element',
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'text' => $element,
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],
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];
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}
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return null;
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}
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protected function blockFencedCodeContinue(array $line, array $block): ?array
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{
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if (isset($block['complete'])) {
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return null;
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}
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if (isset($block['interrupted'])) {
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$block['element']['text']['text'] .= "\n";
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unset($block['interrupted']);
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}
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if (preg_match('/^' . $block['char'] . '{3,}[ ]*$/', $line['text'])) {
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$block['element']['text']['text'] = substr($block['element']['text']['text'], 1);
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$block['complete'] = true;
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return $block;
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}
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|
$block['element']['text']['text'] .= "\n" . $line['body'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected function blockFencedCodeComplete(array $block): array
|
|
{
|
|
$text = $block['element']['text']['text'];
|
|
$block['element']['text']['text'] = $text;
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected function blockHeader(array $line): ?array
|
|
{
|
|
if (isset($line['text'][1])) {
|
|
$level = 1;
|
|
|
|
while (isset($line['text'][$level]) && $line['text'][$level] === '#') {
|
|
$level++;
|
|
}
|
|
|
|
if ($level > 6) {
|
|
return null;
|
|
}
|
|
|
|
$Block = [
|
|
'element' => [
|
|
'name' => 'h' . min(6, $level),
|
|
'text' => trim($line['text'], '# '),
|
|
'handler' => 'line',
|
|
],
|
|
];
|
|
|
|
return $Block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockList(array $Line): ?array
|
|
{
|
|
[$name, $pattern] = $Line['text'][0] <= '-' ? ['ul', '[*+-]'] : ['ol', '[0-9]+[.]'];
|
|
|
|
if (preg_match('/^(' . $pattern . '[ ]+)(.*)/', $Line['text'], $matches)) {
|
|
$block = [
|
|
'indent' => $Line['indent'],
|
|
'pattern' => $pattern,
|
|
'element' => [
|
|
'name' => $name,
|
|
'handler' => 'elements',
|
|
],
|
|
];
|
|
|
|
if ($name === 'ol' && ($listStart = strstr($matches[0], '.', true)) !== '1') {
|
|
$block['element']['attributes'] = ['start' => $listStart];
|
|
}
|
|
|
|
$block['li'] = [
|
|
'name' => 'li',
|
|
'handler' => 'li',
|
|
'text' => [
|
|
$matches[2],
|
|
],
|
|
];
|
|
|
|
$block['element']['text'] [] = &$block['li'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockListContinue(array $line, array $block): ?array
|
|
{
|
|
if ($block['indent'] === $line['indent'] && preg_match('/^' . $block['pattern'] . '(?:[ ]+(.*)|$)/', $line['text'], $matches)) {
|
|
if (isset($block['interrupted'])) {
|
|
$block['li']['text'] [] = '';
|
|
$block['loose'] = true;
|
|
|
|
unset($block['interrupted']);
|
|
}
|
|
|
|
unset($block['li']);
|
|
$text = $matches[1] ?? '';
|
|
|
|
$block['li'] = [
|
|
'name' => 'li',
|
|
'handler' => 'li',
|
|
'text' => [
|
|
$text,
|
|
],
|
|
];
|
|
|
|
$block['element']['text'] [] = &$block['li'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
if ($line['text'][0] === '[' && $this->blockReference($line)) {
|
|
return $block;
|
|
}
|
|
|
|
if (!isset($block['interrupted'])) {
|
|
$text = preg_replace('/^[ ]{0,4}/', '', $line['body']);
|
|
$block['li']['text'] [] = $text;
|
|
|
|
return $block;
|
|
}
|
|
|
|
if ($line['indent'] > 0) {
|
|
$block['li']['text'] [] = '';
|
|
$text = preg_replace('/^[ ]{0,4}/', '', $line['body']);
|
|
$block['li']['text'] [] = $text;
|
|
unset($block['interrupted']);
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockListComplete(array $block): array
|
|
{
|
|
if (isset($block['loose'])) {
|
|
foreach ($block['element']['text'] as &$li) {
|
|
if (end($li['text']) !== '') {
|
|
$li['text'] [] = '';
|
|
}
|
|
}
|
|
}
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected function blockQuote(array $line): ?array
|
|
{
|
|
if (preg_match('/^>[ ]?(.*)/', $line['text'], $matches)) {
|
|
return [
|
|
'element' => [
|
|
'name' => 'blockquote',
|
|
'handler' => 'lines',
|
|
'text' => (array) $matches[1],
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockQuoteContinue($line, array $block): ?array
|
|
{
|
|
if ($line['text'][0] === '>' && preg_match('/^>[ ]?(.*)/', $line['text'], $matches)) {
|
|
if (isset($block['interrupted'])) {
|
|
$block['element']['text'] [] = '';
|
|
unset($block['interrupted']);
|
|
}
|
|
|
|
$block['element']['text'] [] = $matches[1];
|
|
|
|
return $block;
|
|
}
|
|
|
|
if (!isset($block['interrupted'])) {
|
|
$block['element']['text'] [] = $line['text'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockRule(array $line): ?array
|
|
{
|
|
if (preg_match('/^([' . $line['text'][0] . '])([ ]*\1){2,}[ ]*$/', $line['text'])) {
|
|
return [
|
|
'element' => [
|
|
'name' => 'hr',
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockSetextHeader(array $line, array $block = null): ?array
|
|
{
|
|
if (!isset($block) || isset($block['type']) || isset($block['interrupted'])) {
|
|
return null;
|
|
}
|
|
|
|
if (rtrim($line['text'], $line['text'][0]) === '') {
|
|
$block['element']['name'] = $line['text'][0] === '=' ? 'h1' : 'h2';
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockMarkup(array $line): ?array
|
|
{
|
|
if ($this->markupEscaped || $this->safeMode) {
|
|
return null;
|
|
}
|
|
|
|
if (preg_match('/^<(\w[\w-]*)(?:[ ]*' . $this->regexHtmlAttribute . ')*[ ]*(\/)?>/', $line['text'], $matches)) {
|
|
$element = strtolower($matches[1]);
|
|
|
|
if (in_array($element, $this->textLevelElements, true)) {
|
|
return null;
|
|
}
|
|
|
|
$block = [
|
|
'name' => $matches[1],
|
|
'depth' => 0,
|
|
'markup' => $line['text'],
|
|
];
|
|
|
|
$length = strlen($matches[0]);
|
|
$remainder = substr($line['text'], $length);
|
|
|
|
if (trim($remainder) === '') {
|
|
if (isset($matches[2]) || in_array($matches[1], $this->voidElements, true)) {
|
|
$block['closed'] = true;
|
|
|
|
$block['void'] = true;
|
|
}
|
|
} else {
|
|
if (isset($matches[2]) || in_array($matches[1], $this->voidElements, true)) {
|
|
return null;
|
|
}
|
|
|
|
if (preg_match('/<\/' . $matches[1] . '>[ ]*$/i', $remainder)) {
|
|
$block['closed'] = true;
|
|
}
|
|
}
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockMarkupContinue(array $line, array $block): ?array
|
|
{
|
|
if (isset($block['closed'])) {
|
|
return null;
|
|
}
|
|
|
|
if (preg_match('/^<' . $block['name'] . '(?:[ ]*' . $this->regexHtmlAttribute . ')*[ ]*>/i', $line['text'])) {
|
|
$block['depth']++; // Open
|
|
}
|
|
|
|
if (preg_match('/(.*?)<\/' . $block['name'] . '>[ ]*$/i', $line['text'], $matches)) {
|
|
if ($block['depth'] > 0) { // Close
|
|
$block['depth']--;
|
|
} else {
|
|
$block['closed'] = true;
|
|
}
|
|
}
|
|
|
|
if (isset($block['interrupted'])) {
|
|
$block['markup'] .= "\n";
|
|
unset($block['interrupted']);
|
|
}
|
|
|
|
$block['markup'] .= "\n" . $line['body'];
|
|
|
|
return $block;
|
|
}
|
|
|
|
protected function blockReference(array $line): ?array
|
|
{
|
|
if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $line['text'], $matches)) {
|
|
$data = [
|
|
'url' => $matches[2],
|
|
'title' => null,
|
|
];
|
|
|
|
if (isset($matches[3])) {
|
|
$data['title'] = $matches[3];
|
|
}
|
|
|
|
$this->DefinitionData['Reference'][strtolower($matches[1])] = $data;
|
|
|
|
return [
|
|
'hidden' => true,
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockTable(array $line, ?array $block = null): ?array
|
|
{
|
|
if (!isset($block) || isset($block['type']) || isset($block['interrupted'])) {
|
|
return null;
|
|
}
|
|
|
|
if (rtrim($line['text'], ' -:|') === '' && strpos($block['element']['text'], '|') !== false) {
|
|
$alignments = [];
|
|
|
|
foreach (explode('|', trim(trim($line['text']), '|')) as $dividerCell) {
|
|
$dividerCell = trim($dividerCell);
|
|
|
|
if ($dividerCell === '') {
|
|
continue;
|
|
}
|
|
|
|
$alignment = null;
|
|
|
|
if (strpos($dividerCell, ':') === 0) {
|
|
$alignment = 'left';
|
|
}
|
|
|
|
if (substr($dividerCell, -1) === ':') {
|
|
$alignment = $alignment === 'left' ? 'center' : 'right';
|
|
}
|
|
|
|
$alignments[] = $alignment;
|
|
}
|
|
|
|
$headerElements = [];
|
|
$header = trim(trim($block['element']['text']), '|');
|
|
$headerCells = explode('|', $header);
|
|
|
|
foreach ($headerCells as $index => $headerCell) {
|
|
$headerCell = trim($headerCell);
|
|
|
|
$HeaderElement = [
|
|
'name' => 'th',
|
|
'text' => $headerCell,
|
|
'handler' => 'line',
|
|
];
|
|
|
|
if (isset($alignments[$index])) {
|
|
$alignment = $alignments[$index];
|
|
|
|
$HeaderElement['attributes'] = [
|
|
'style' => 'text-align: ' . $alignment . ';',
|
|
];
|
|
}
|
|
|
|
$headerElements[] = $HeaderElement;
|
|
}
|
|
|
|
$block = [
|
|
'alignments' => $alignments,
|
|
'identified' => true,
|
|
'element' => [
|
|
'name' => 'table',
|
|
'handler' => 'elements',
|
|
],
|
|
];
|
|
|
|
$block['element']['text'] [] = [
|
|
'name' => 'thead',
|
|
'handler' => 'elements',
|
|
];
|
|
|
|
$block['element']['text'] [] = [
|
|
'name' => 'tbody',
|
|
'handler' => 'elements',
|
|
'text' => [],
|
|
];
|
|
|
|
$block['element']['text'][0]['text'] [] = [
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $headerElements,
|
|
];
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function blockTableContinue(array $line, array $block): ?array
|
|
{
|
|
if (isset($block['interrupted'])) {
|
|
return null;
|
|
}
|
|
|
|
if ($line['text'][0] === '|' || strpos($line['text'], '|')) {
|
|
$elements = [];
|
|
$row = trim(trim($line['text']), '|');
|
|
preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
|
|
|
|
foreach ($matches[0] as $index => $cell) {
|
|
$cell = trim($cell);
|
|
|
|
$element = [
|
|
'name' => 'td',
|
|
'handler' => 'line',
|
|
'text' => $cell,
|
|
];
|
|
|
|
if (isset($block['alignments'][$index])) {
|
|
$element['attributes'] = [
|
|
'style' => 'text-align: ' . $block['alignments'][$index] . ';',
|
|
];
|
|
}
|
|
|
|
$elements[] = $element;
|
|
}
|
|
|
|
$element = [
|
|
'name' => 'tr',
|
|
'handler' => 'elements',
|
|
'text' => $elements,
|
|
];
|
|
|
|
$block['element']['text'][1]['text'] [] = $element;
|
|
|
|
return $block;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function paragraph(array $line): array
|
|
{
|
|
return [
|
|
'element' => [
|
|
'name' => 'p',
|
|
'text' => $line['text'],
|
|
'handler' => 'line',
|
|
],
|
|
];
|
|
}
|
|
|
|
protected function inlineCode(array $excerpt): ?array
|
|
{
|
|
$marker = $excerpt['text'][0];
|
|
|
|
if (preg_match('/^(' . $marker . '+)[ ]*(.+?)[ ]*(?<!' . $marker . ')\1(?!' . $marker . ')/s', $excerpt['text'], $matches)) {
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'code',
|
|
'text' => (string) preg_replace("/[ ]*\n/", ' ', $matches[2]),
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineEmailTag(array $excerpt): ?array
|
|
{
|
|
if (strpos($excerpt['text'], '>') !== false && preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $excerpt['text'], $matches)) {
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $matches[1],
|
|
'attributes' => [
|
|
'href' => !isset($matches[2]) ? 'mailto:' . $matches[1] : $matches[1],
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineEmphasis(array $excerpt): ?array
|
|
{
|
|
if (!isset($excerpt['text'][1])) {
|
|
return null;
|
|
}
|
|
|
|
$marker = $excerpt['text'][0];
|
|
|
|
if ($excerpt['text'][1] === $marker && preg_match($this->StrongRegex[$marker], $excerpt['text'], $matches)) {
|
|
$emphasis = 'strong';
|
|
} elseif (preg_match($this->EmRegex[$marker], $excerpt['text'], $matches)) {
|
|
$emphasis = 'em';
|
|
} else {
|
|
return null;
|
|
}
|
|
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => $emphasis,
|
|
'handler' => 'line',
|
|
'text' => $matches[1],
|
|
],
|
|
];
|
|
}
|
|
|
|
protected function inlineEscapeSequence(array $excerpt): ?array
|
|
{
|
|
if (isset($excerpt['text'][1]) && in_array($excerpt['text'][1], $this->specialCharacters, true)) {
|
|
return [
|
|
'markup' => $excerpt['text'][1],
|
|
'extent' => 2,
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineImage(array $excerpt): ?array
|
|
{
|
|
if (!isset($excerpt['text'][1]) || $excerpt['text'][1] !== '[') {
|
|
return null;
|
|
}
|
|
|
|
$excerpt['text'] = substr($excerpt['text'], 1);
|
|
$Link = $this->inlineLink($excerpt);
|
|
|
|
if ($Link === null) {
|
|
return null;
|
|
}
|
|
|
|
$inline = [
|
|
'extent' => $Link['extent'] + 1,
|
|
'element' => [
|
|
'name' => 'img',
|
|
'attributes' => [
|
|
'src' => $Link['element']['attributes']['href'],
|
|
'alt' => $Link['element']['text'],
|
|
],
|
|
],
|
|
];
|
|
|
|
$inline['element']['attributes'] += $Link['element']['attributes'];
|
|
unset($inline['element']['attributes']['href']);
|
|
|
|
return $inline;
|
|
}
|
|
|
|
protected function inlineLink(array $excerpt): ?array
|
|
{
|
|
$element = [
|
|
'name' => 'a',
|
|
'handler' => 'line',
|
|
'nonNestables' => ['Url', 'Link'],
|
|
'text' => null,
|
|
'attributes' => [
|
|
'href' => null,
|
|
'title' => null,
|
|
],
|
|
];
|
|
|
|
$extent = 0;
|
|
$remainder = $excerpt['text'];
|
|
|
|
if (preg_match('/\[((?:[^][]++|(?R))*+)\]/', $remainder, $matches)) {
|
|
$element['text'] = $matches[1];
|
|
$extent += strlen($matches[0]);
|
|
$remainder = substr($remainder, $extent);
|
|
} else {
|
|
return null;
|
|
}
|
|
|
|
if (preg_match('/^[(]\s*+((?:[^ ()]++|[(][^ )]+[)])++)(?:[ ]+("[^"]*"|\'[^\']*\'))?\s*[)]/', $remainder, $matches)) {
|
|
$element['attributes']['href'] = $matches[1];
|
|
$extent += strlen($matches[0]);
|
|
|
|
if (isset($matches[2])) {
|
|
$element['attributes']['title'] = substr($matches[2], 1, -1);
|
|
}
|
|
} else {
|
|
if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches)) {
|
|
$definition = ($matches[1] ?? '') !== '' ? $matches[1] : $element['text'];
|
|
$definition = strtolower($definition);
|
|
$extent += strlen($matches[0]);
|
|
} else {
|
|
$definition = strtolower($element['text']);
|
|
}
|
|
|
|
if (!isset($this->DefinitionData['Reference'][$definition])) {
|
|
return null;
|
|
}
|
|
|
|
$element['attributes']['href'] = $this->DefinitionData['Reference'][$definition]['url'];
|
|
$element['attributes']['title'] = $this->DefinitionData['Reference'][$definition]['title'];
|
|
}
|
|
|
|
return [
|
|
'extent' => $extent,
|
|
'element' => $element,
|
|
];
|
|
}
|
|
|
|
protected function inlineMarkup(array $excerpt): ?array
|
|
{
|
|
if ($this->markupEscaped || $this->safeMode || strpos($excerpt['text'], '>') === false) {
|
|
return null;
|
|
}
|
|
|
|
if ($excerpt['text'][1] === '/' && preg_match('/^<\/\w[\w-]*[ ]*>/', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
|
|
if ($excerpt['text'][1] === '!' && preg_match('/^<!---?[^>-](?:-?[^-])*-->/', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
|
|
if ($excerpt['text'][1] !== ' ' && preg_match('/^<\w[\w-]*(?:[ ]*' . $this->regexHtmlAttribute . ')*[ ]*\/?>/s', $excerpt['text'], $matches)) {
|
|
return [
|
|
'markup' => $matches[0],
|
|
'extent' => strlen($matches[0]),
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineSpecialCharacter(array $excerpt): ?array
|
|
{
|
|
static $specialCharacter = ['>' => 'gt', '<' => 'lt', '"' => 'quot'];
|
|
|
|
if ($excerpt['text'][0] === '&' && !preg_match('/^&#?\w+;/', $excerpt['text'])) {
|
|
return [
|
|
'markup' => '&',
|
|
'extent' => 1,
|
|
];
|
|
}
|
|
|
|
if (isset($specialCharacter[$excerpt['text'][0]])) {
|
|
return [
|
|
'markup' => '&' . $specialCharacter[$excerpt['text'][0]] . ';',
|
|
'extent' => 1,
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineStrikethrough(array $excerpt): ?array
|
|
{
|
|
if (!isset($excerpt['text'][1])) {
|
|
return null;
|
|
}
|
|
|
|
if ($excerpt['text'][1] === '~' && preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $excerpt['text'], $matches)) {
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'del',
|
|
'text' => $matches[1],
|
|
'handler' => 'line',
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineUrl(array $excerpt): ?array
|
|
{
|
|
if ($this->urlsLinked !== true || !isset($excerpt['text'][2]) || $excerpt['text'][2] !== '/') {
|
|
return null;
|
|
}
|
|
|
|
if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $excerpt['context'], $matches, PREG_OFFSET_CAPTURE)) {
|
|
return [
|
|
'extent' => strlen($matches[0][0]),
|
|
'position' => $matches[0][1],
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $matches[0][0],
|
|
'attributes' => [
|
|
'href' => $matches[0][0],
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function inlineUrlTag(array $excerpt): array
|
|
{
|
|
if (strpos($excerpt['text'], '>') !== false && preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $excerpt['text'], $matches)) {
|
|
return [
|
|
'extent' => strlen($matches[0]),
|
|
'element' => [
|
|
'name' => 'a',
|
|
'text' => $matches[1],
|
|
'attributes' => [
|
|
'href' => $matches[1],
|
|
],
|
|
],
|
|
];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
protected function unmarkedText(string $haystack): string
|
|
{
|
|
if ($this->breaksEnabled) {
|
|
$haystack = (string) preg_replace('/[ ]*\n/', "<br />\n", $haystack);
|
|
} else {
|
|
$haystack = (string) preg_replace('/(?:[ ]{2,}|[ ]*\\\\)\n/', "<br />\n", $haystack);
|
|
$haystack = str_replace(" \n", "\n", $haystack);
|
|
}
|
|
|
|
return $haystack;
|
|
}
|
|
|
|
protected function element(array $element): string
|
|
{
|
|
if ($this->safeMode) {
|
|
$element = $this->sanitiseElement($element);
|
|
}
|
|
|
|
$markup = '<' . $element['name'];
|
|
|
|
if (isset($element['attributes'])) {
|
|
foreach ($element['attributes'] as $name => $value) {
|
|
if ($value === null) {
|
|
continue;
|
|
}
|
|
|
|
$markup .= ' ' . $name . '="' . self::escape($value) . '"';
|
|
}
|
|
}
|
|
|
|
if (isset($element['text'])) {
|
|
$markup .= '>';
|
|
|
|
if (!isset($element['nonNestables'])) {
|
|
$element['nonNestables'] = [];
|
|
}
|
|
|
|
if (isset($element['handler'])) {
|
|
$markup .= $this->{$element['handler']}($element['text'], $element['nonNestables']);
|
|
} else {
|
|
$markup .= self::escape($element['text'], true);
|
|
}
|
|
|
|
$markup .= '</' . $element['name'] . '>';
|
|
} else {
|
|
$markup .= ' />';
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
|
|
protected function elements(array $Elements): string
|
|
{
|
|
$markup = '';
|
|
|
|
foreach ($Elements as $Element) {
|
|
$markup .= "\n" . $this->element($Element);
|
|
}
|
|
|
|
return $markup . "\n";
|
|
}
|
|
|
|
protected function li(array $lines): string
|
|
{
|
|
$markup = $this->lines($lines);
|
|
|
|
if (!\in_array('', $lines, true) && strpos($trimmedMarkup = trim($markup), '<p>') === 0) {
|
|
$markup = substr_replace(substr($trimmedMarkup, 3), '', strpos($markup, '</p>'), 4);
|
|
}
|
|
|
|
return $markup;
|
|
}
|
|
|
|
protected function sanitiseElement(array $element): array
|
|
{
|
|
static $goodAttribute = '/^[a-zA-Z0-9][a-zA-Z0-9-_]*+$/';
|
|
static $safeUrlNameToAtt = [
|
|
'a' => 'href',
|
|
'img' => 'src',
|
|
];
|
|
|
|
if (isset($safeUrlNameToAtt[$element['name']])) {
|
|
$element = $this->filterUnsafeUrlInAttribute($element, $safeUrlNameToAtt[$element['name']]);
|
|
}
|
|
|
|
if (!empty($element['attributes'])) {
|
|
foreach ($element['attributes'] as $att => $val) {
|
|
if (!preg_match($goodAttribute, $att)) { // filter out badly parsed attribute
|
|
unset($element['attributes'][$att]);
|
|
} elseif (self::striAtStart($att, 'on')) { // dump onevent attribute
|
|
unset($element['attributes'][$att]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $element;
|
|
}
|
|
|
|
protected function filterUnsafeUrlInAttribute(array $element, $attribute): array
|
|
{
|
|
foreach ($this->safeLinksWhitelist as $scheme) {
|
|
if (self::striAtStart($element['attributes'][$attribute], $scheme)) {
|
|
return $element;
|
|
}
|
|
}
|
|
|
|
$element['attributes'][$attribute] = str_replace(':', '%3A', $element['attributes'][$attribute]);
|
|
|
|
return $element;
|
|
}
|
|
|
|
}
|