From 1f771698b2abd8995017bb54e8ba3ec065a9bba1 Mon Sep 17 00:00:00 2001
From: qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 27 Sep 2007 12:00:18 +0000
Subject: translate Ctrl + alpha  to control value for simple text input
 protocol

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3952 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Bus/Usb/UsbKbDxe/keyboard.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'MdeModulePkg')

diff --git a/MdeModulePkg/Bus/Usb/UsbKbDxe/keyboard.c b/MdeModulePkg/Bus/Usb/UsbKbDxe/keyboard.c
index 44914afb54..9ad1bcef24 100644
--- a/MdeModulePkg/Bus/Usb/UsbKbDxe/keyboard.c
+++ b/MdeModulePkg/Bus/Usb/UsbKbDxe/keyboard.c
@@ -857,7 +857,18 @@ USBKeyCodeToEFIScanCode (
 
     }
   }
-
+  //
+  // Translate the CTRL-Alpha characters to their corresponding control value  (ctrl-a = 0x0001 through ctrl-Z = 0x001A)
+  //
+  if (UsbKeyboardDevice->CtrlOn) {
+    if (Key->UnicodeChar >= 'a' && Key->UnicodeChar <= 'z') {
+      Key->UnicodeChar = (UINT16) (Key->UnicodeChar - 'a' + 1);
+    } else if (Key->UnicodeChar >= 'A' && Key->UnicodeChar <= 'Z') {
+      Key->UnicodeChar = (UINT16) (Key->UnicodeChar - 'A' + 1);
+    }
+  }
+  
+  
   if (KeyChar >= 0x59 && KeyChar <= 0x63) {
 
     if (UsbKeyboardDevice->NumLockOn && !UsbKeyboardDevice->ShiftOn) {
-- 
cgit v1.2.3