Continue refactoring of non-PHP syntax highlighting

src/Editor.php

@@ -772,10 +772,11 @@ class Editor {
 		{
 			$this->document->delete($this->cursor);
 		}
-		else if ($ch === KeyType::BACKSPACE && ($this->cursor->x > 0 || $this->cursor->y > 0))
+
+		if ($ch === KeyType::BACKSPACE && ($this->cursor->x > 0 || $this->cursor->y > 0))
 		{
-			$this->document->delete($this->cursor);
 			$this->moveCursor(KeyType::ARROW_LEFT);
+			$this->document->delete($this->cursor);
 		}
 	}
 
@@ -783,10 +784,16 @@ class Editor {
 	{
 		if ($this->document->isDirty() && $this->quitTimes > 0)
 		{
+			if ($this->quitTimes === KILO_QUIT_TIMES)
+			{
+				Terminal::ding();
+			}
+
 			$this->setStatusMessage(
 				'WARNING!!! File has unsaved changes. Press Ctrl-Q %d more times to quit.',
 				$this->quitTimes
 			);
+
 			$this->quitTimes--;
 			return;
 		}

src/Row.php

@@ -219,12 +219,14 @@ class Row {
 			return;
 		}
 
-		$keywords1 = $this->parent->fileType->syntax->keywords1;
-		$keywords2 = $this->parent->fileType->syntax->keywords2;
+		$syntax = $this->parent->fileType->syntax;
 
-		$scs = $this->parent->fileType->syntax->singleLineCommentStart;
-		$mcs = $this->parent->fileType->syntax->multiLineCommentStart;
-		$mce = $this->parent->fileType->syntax->multiLineCommentEnd;
+		$keywords1 = $syntax->keywords1;
+		$keywords2 = $syntax->keywords2;
+
+		$scs = $syntax->singleLineCommentStart;
+		$mcs = $syntax->multiLineCommentStart;
+		$mce = $syntax->multiLineCommentEnd;
 
 		$scsLen = strlen($scs);
 		$mcsLen = strlen($mcs);
@@ -281,7 +283,7 @@ class Row {
 			$this->highlightString($i);
 
 			// Numbers, including decimal points
-			if ($this->parent->fileType->syntax->flags & Syntax::HIGHLIGHT_NUMBERS)
+			if ($syntax->flags & Syntax::HIGHLIGHT_NUMBERS)
 			{
 				if (
 					($char === '.' && $prevHl === Highlight::NUMBER) ||

src/Terminal.php

@@ -115,6 +115,14 @@ class Terminal {
 		};
 	}
 
+	/**
+	 * Ring the terminal bell
+	 */
+	public static function ding(): void
+	{
+		self::write(RawKeyCode::BELL);
+	}
+
 	/**
 	 * Write to the stdout stream
 	 *