`; // the spec expects bare `

...

`. $this->doc .= "

\n"; } public function quote_close() { $this->doc .= "

\n"; } public function listu_open($classes = null) { $this->doc .= "

\n"; } public function listu_close() { $this->doc .= "

\n"; } public function listo_open($classes = null) { $this->doc .= "

\n"; } public function listo_open_start($start = 1) { $start = (int) $start; if ($start === 1) { $this->listo_open(); return; } $this->doc .= '
\n"; } public function listo_close() { $this->doc .= "
\n"; } public function listitem_open($level, $node = false) { $this->doc .= '
1. '; } public function listitem_close() { $this->doc .= "
\n"; } public function listcontent_open() { // GFM has no per-item content wrapper - tight items put text directly // inside
2. , loose items wrap it in

   . The handler emits/strips // p_open / p_close to drive that distinction; the wrapper itself // produces no output here. } public function listcontent_close() { } public function file($text, $language = null, $filename = null, $options = null) { $this->doc .= $this->specCode($text, $language); } public function preformatted($text) { // The Preformatted CallWriter rewriter collapses start/content/ // newline/end into one `preformatted` call. GFM expects the body // to end with a newline (spec example 104); DW's internal text // loses it to `trim()`, so we re-append here. $this->doc .= $this->specCode($text . "\n", null); } /** * GFM shape:

   ...

   . The * production DW renderer emits

    with no inner
        * , which diverges byte-for-byte.
        */
       private function specCode($text, $language): string
       {
           $classAttr = '';
           if ($language !== null && $language !== '') {
               $classAttr = ' class="language-' . hsc((string) $language) . '"';
           }
           return '
   ' . hsc((string) $text) . '
   ';
       }
   
       private function specImg($src, $alt, $width, $height): string
       {
           $out = 'label. If the label is a media
        * descriptor array (the shape Media::parseMedia() returns, passed by
        * Internallink / GfmLink when the label is `{{img}}` / `![alt](img)`),
        * render the  inside the .
        */
       private function specLink($href, $label): string
       {
           $href = $this->specEncodeUrl((string) $href);
           if (is_array($label) && isset($label['type'])) {
               $img = $this->specImg(
                   $label['src'],
                   $label['title'],
                   $label['width'] ?? null,
                   $label['height'] ?? null
               );
               return '' . $img . '';
           }
           $text = ($label === null || $label === '') ? $href : $label;
           return '' . hsc((string) $text) . '';
       }
   
       /**
        * Percent-encode characters not in CommonMark's URL-safe set,
        * preserving existing %XX sequences. Matches what cmark-gfm's
        * reference renderer does for the spec corpus: UTF-8 bytes and
        * non-URL-safe ASCII (e.g. `\`, space) become %XX; alphanumerics,
        * RFC 3986 unreserved/reserved, and `%` itself pass through.
        */
       private function specEncodeUrl(string $url): string
       {
           return preg_replace_callback(
               "/[^A-Za-z0-9\\-._~:\\/?#\\[\\]@!$&'()*+,;=%]/",
               static fn($m) => '%' . strtoupper(bin2hex($m[0])),
               $url
           );
       }
   }