From 84c4110a501cc576d72e305270f2de5c97edd5a4 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Wed, 23 Jan 2019 08:30:48 +0100
Subject: [PATCH] Keyboard: Support the escape key.

---
 Kernel/Keyboard.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/Kernel/Keyboard.cpp b/Kernel/Keyboard.cpp
index 66c839df7c..a6ebc26acb 100644
--- a/Kernel/Keyboard.cpp
+++ b/Kernel/Keyboard.cpp
@@ -6,6 +6,8 @@
 #include "VirtualConsole.h"
 #include <AK/Assertions.h>
 
+//#define KEYBOARD_DEBUG
+
 #define IRQ_KEYBOARD             1
 #define I8042_BUFFER             0x60
 #define I8042_STATUS             0x64
@@ -15,7 +17,7 @@
 
 static char map[0x80] =
 {
-    0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0x08, 0,
+    0, '\033', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0x08, 0,
     'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', 0,
     'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`', 0, '\\',
     'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
@@ -24,7 +26,7 @@ static char map[0x80] =
 
 static char shift_map[0x80] =
 {
-    0, 0, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
+    0, '\033', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
     'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', 0,
     'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', 0, '|',
     'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
@@ -33,7 +35,7 @@ static char shift_map[0x80] =
 
 static KeyCode unshifted_key_map[0x80] =
 {
-    Key_Invalid, Key_Invalid,
+    Key_Invalid, Key_Escape,
     Key_1, Key_2, Key_3, Key_4, Key_5, Key_6, Key_7, Key_8, Key_9, Key_0, Key_Minus, Key_Equal, Key_Backspace,
     Key_Invalid, //15
     Key_Q, Key_W, Key_E, Key_R, Key_T, Key_Y, Key_U, Key_I, Key_O, Key_P, Key_LeftBracket, Key_RightBracket,
@@ -50,7 +52,7 @@ static KeyCode unshifted_key_map[0x80] =
 
 static KeyCode shifted_key_map[0x100] =
 {
-    Key_Invalid, Key_Invalid,
+    Key_Invalid, Key_Escape,
     Key_ExclamationPoint, Key_AtSign, Key_Hashtag, Key_Dollar, Key_Percent, Key_Circumflex, Key_Ampersand, Key_Asterisk, Key_LeftParen, Key_RightParen, Key_Underscore, Key_Plus, Key_Backspace,
     Key_Invalid,
     Key_Q, Key_W, Key_E, Key_R, Key_T, Key_Y, Key_U, Key_I, Key_O, Key_P, Key_LeftBrace, Key_RightBrace,
@@ -86,6 +88,9 @@ void Keyboard::handle_irq()
         byte ch = raw & 0x7f;
         bool pressed = !(raw & 0x80);
 
+#ifdef KEYBOARD_DEBUG
+        dbgprintf("Keyboard::handle_irq: %b %s\n", ch, pressed ? "down" : "up");
+#endif
         switch (ch) {
         case 0x38: update_modifier(Mod_Alt, pressed); break;
         case 0x1d: update_modifier(Mod_Ctrl, pressed); break;