Add basic line numbers

src/Editor.php

@@ -13,6 +13,14 @@ use Aviat\Kilo\Type\TerminalSize;
  * // Don't highlight this!
  */
 class Editor {
+	/**
+	 * @var bool Whether to render line numbers
+	 */
+	public bool $showLineNumbers = true;
+	/**
+	 * @var int The size of the line number Gutter in characters
+	 */
+	public int $numberGutter = 5;
 	/**
 	 * @var string The screen buffer
 	 */
@@ -411,6 +419,11 @@ class Editor {
 			$len = $this->terminalSize->cols;
 		}
 
+		if ($this->showLineNumbers)
+		{
+			$this->outputBuffer .= sprintf("%-{$this->numberGutter}s", ($rowIdx+1));
+		}
+
 		$chars = substr($row->render, $this->offset->x, (int)$len);
 		$hl = array_slice($row->hl, $this->offset->x, (int)$len);
 
@@ -544,10 +557,12 @@ class Editor {
 		$this->drawStatusBar();
 		$this->drawMessageBar();
 
+		$gutter = ($this->showLineNumbers) ? $this->numberGutter : 0;
+
 		// Specify the current cursor position
 		$this->outputBuffer .= ANSI::moveCursor(
 			$this->cursor->y - $this->offset->y,
-			$this->renderX - $this->offset->x
+			($this->renderX - $this->offset->x) + $gutter,
 		);
 
 		$this->outputBuffer .= ANSI::SHOW_CURSOR;

src/Syntax.php

@@ -4,6 +4,9 @@ namespace Aviat\Kilo;
 
 use Aviat\Kilo\Enum\SyntaxFamily;
 
+/**
+ * A representation of the syntax of a programming language
+ */
 class Syntax {
 	// Tokens for PHP files
 	public array $tokens = [];
@@ -46,10 +49,10 @@ class Syntax {
 	public static function default(): self
 	{
 		return self::new(
-			'No filetype', slcs:
+			'No filetype',
-			'', mcs:
+			slcs: '',
-			'', mce:
+			mcs: '',
-			'',
+			mce: '',
 			highlightNumbers: false,
 			highlightStrings: false,
 			hasCommonOperators: false,