From e0a9d066ca735dcb2c29b590d10bfeff36034262 Mon Sep 17 00:00:00 2001
From: Timothy J Warren <tim@timshomepage.net>
Date: Fri, 11 Oct 2019 16:32:47 -0400
Subject: [PATCH] Up to step 21

---
 kilo              | 29 ++++-------------------------
 src/editor.php    | 27 +++++++++++++++++++++++++++
 src/functions.php |  7 +++++++
 3 files changed, 38 insertions(+), 25 deletions(-)
 create mode 100644 src/editor.php

diff --git a/kilo b/kilo
index 6a45220..6a28dcf 100755
--- a/kilo
+++ b/kilo
@@ -5,41 +5,20 @@ namespace Kilo;
 
 require_once __DIR__ . '/src/constants.php';
 require_once __DIR__ . '/src/functions.php';
+require_once __DIR__ . '/src/editor.php';
 
 function main(): int
 {
-	global $ffi;
-
 	enableRawMode();
 
+	$editor = new Editor();
+
 	// Input Loop
 	while (true)
 	{
-		$char = read_stdin(1);
-		$c = ord($char);
-
-		if (empty($char))
-		{
-			continue;
-		}
-
-		if ($ffi->iscntrl($c))
-		{
-			printf("%d\r\n", $c);
-		}
-		else
-		{
-			printf("%d ('%c')\r\n", $c, $c);
-		}
-
-		if ($char === 'q')
-		{
-			break;
-		}
+		$editor->processKeypress();
 	}
 
-	disableRawMode();
-
 	return 0;
 }
 
diff --git a/src/editor.php b/src/editor.php
new file mode 100644
index 0000000..8057c43
--- /dev/null
+++ b/src/editor.php
@@ -0,0 +1,27 @@
+<?php declare(strict_types=1);
+
+namespace Kilo;
+
+class Editor {
+	public function __construct()
+	{
+
+	}
+
+	public function processKeypress(): void
+	{
+		$c = $this->readKey();
+
+		switch($c)
+		{
+			case chr(ctrl_key('q')):
+				exit(0);
+			break;
+		}
+	}
+
+	protected function readKey(): string
+	{
+		return read_stdin(1);
+	}
+}
\ No newline at end of file
diff --git a/src/functions.php b/src/functions.php
index 6139640..b825691 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -12,6 +12,8 @@ function enableRawMode(): void
 	global $ffi;
 	global $original_termios;
 
+	register_shutdown_function('Kilo\\disableRawMode');
+
 	// Populate the original terminal settings
 	$ffi->tcgetattr(STDIN_FILENO, FFI::addr($original_termios));
 
@@ -44,4 +46,9 @@ function read_stdin(int $len = 128): string
 	fclose($handle);
 
 	return $input;
+}
+
+function ctrl_key(string $char): int
+{
+	return ord($char) & 0x1f;
 }
\ No newline at end of file