feat(highlighter): support lineno

Author: adhocore

src/Highlighter.php

@@ -23,30 +23,53 @@ public function __toString(): string
         return $this->highlight();
     }
 
-    public function highlight(string $code = null): string
+    public function highlight(string $code = null, array $options = []): string
     {
-        $this->parse($code);
+        $this->setOptions($options);
+
+        $this->parse($code ?? $this->code);
 
         return \trim($this->out, "\n") . "\n";
     }
 
-    protected function reset()
+    protected function doReset()
     {
         $this->out = '';
     }
 
     protected function visit(\DOMNode $el)
+    {
+        $type = $el instanceof \DOMElement ? $el->getAttribute('data-type') : 'raw';
+        $text = \str_replace(['&nbsp;', '&lt;', '&gt;'], [' ', '<', '>'], $el->textContent);
+
+        $lastLine = 0;
+        $lines    = \explode("\n", $text);
+        foreach ($lines as $i => $line) {
+            $this->out .= $this->formatLine($type, $line);
+
+            if (isset($lines[$i + 1])) {
+                $this->out .= "\n";
+            }
+
+            $this->lengths[$this->lineNo++] = \strlen($line);
+        }
+    }
+
+    protected function formatLine(string $type, string $line)
     {
         static $formats = [
             'comment' => "\033[0;34;40m%s\033[0m",
             'default' => "\033[0;32;40m%s\033[0m",
             'keyword' => "\033[0;31;40m%s\033[0m",
             'string'  => "\033[0;33;40m%s\033[0m",
+            'lineno'  => "\033[2;36;40m%s\033[0m",
+            'raw'     => '%s',
         ];
 
-        $type = $el instanceof \DOMElement ? $el->getAttribute('data-type') : 'raw';
-        $text = \str_replace(['&nbsp;', '&lt;', '&gt;'], [' ', '<', '>'], $el->textContent);
+        if ('' !== $lineNo = $this->formatLineNo()) {
+            $lineNo = \sprintf($formats['lineno'], $lineNo);
+        }
 
-        $this->out .= \sprintf($formats[$type] ?? '%s', $text);
+        return $lineNo . \sprintf($formats[$type], $line);
     }
 }