From fb03061a2a68dd70dda54ddcb74c8fe92d994c0a Mon Sep 17 00:00:00 2001
From: Konstantin Aladyshev <aladyshev22@gmail.com>
Date: Wed, 14 Jul 2021 12:54:56 +0300
Subject: Add lesson 39

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
---
 UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c | 107 +++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100755 UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c

(limited to 'UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c')

diff --git a/UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c b/UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c
new file mode 100755
index 0000000..bb73c0c
--- /dev/null
+++ b/UefiLessonsPkg/HotKeyDriver/HotKeyDriver.c
@@ -0,0 +1,107 @@
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include <Protocol/SimpleTextInEx.h>
+
+
+EFI_HANDLE NotifyHandle;
+EFI_HANDLE NotifyHandle1;
+
+EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL* InputEx = NULL;
+
+EFI_STATUS EFIAPI MyKeyNotificationFunction(EFI_KEY_DATA* KeyData)
+{
+	Print(L"\nHot Key 1 is pressed");
+	return EFI_SUCCESS;
+}
+
+EFI_STATUS EFIAPI MyKeyNotificationFunction1(EFI_KEY_DATA* KeyData)
+{
+	Print(L"\nHot Key 2 is pressed");
+	return EFI_SUCCESS;
+}
+
+
+EFI_STATUS
+EFIAPI
+HotKeyDriverUnload(
+  IN EFI_HANDLE        ImageHandle
+  )
+{
+  if (!InputEx)
+    return EFI_SUCCESS;
+
+  EFI_STATUS Status;
+
+  if (!NotifyHandle) {
+    Status = InputEx->UnregisterKeyNotify(InputEx,
+                                   (VOID*)NotifyHandle);
+
+    if (EFI_ERROR(Status)) {
+      Print(L"Error! Can't perform RegisterKeyNotify: %r", Status);
+      return Status;
+    }
+  }
+
+  if (!NotifyHandle1) {
+    Status = InputEx->UnregisterKeyNotify(InputEx,
+                       (VOID*)NotifyHandle1);
+
+    if (EFI_ERROR(Status)) {
+      Print(L"Error! Can't perform RegisterKeyNotify: %r", Status);
+      return Status;
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+EFI_STATUS
+EFIAPI
+HotKeyDriverEntryPoint(
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS Status = gBS->LocateProtocol(
+			 &gEfiSimpleTextInputExProtocolGuid,
+			 NULL,
+			 (VOID**)&InputEx
+			 );
+  if (EFI_ERROR(Status)) {
+    Print(L"Error! Can't locate EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL: %r", Status);
+    return Status;
+  }
+
+  EFI_KEY_DATA HotKey;
+  HotKey.Key.ScanCode = 0;
+  HotKey.Key.UnicodeChar = L'z';
+  HotKey.KeyState.KeyShiftState = EFI_LEFT_CONTROL_PRESSED | EFI_LEFT_ALT_PRESSED | EFI_SHIFT_STATE_VALID;
+  HotKey.KeyState.KeyToggleState = 0;
+
+  Status = InputEx->RegisterKeyNotify(InputEx,
+			&HotKey,
+			MyKeyNotificationFunction,
+                        (VOID**)&NotifyHandle);
+
+  if (EFI_ERROR(Status)) {
+    Print(L"Error! Can't perform RegisterKeyNotify: %r", Status);
+    return Status;
+  }
+
+  HotKey.KeyState.KeyShiftState = 0;
+  HotKey.KeyState.KeyToggleState = EFI_TOGGLE_STATE_VALID | EFI_NUM_LOCK_ACTIVE | EFI_KEY_STATE_EXPOSED;
+
+  Status = InputEx->RegisterKeyNotify(InputEx,
+			&HotKey,
+			MyKeyNotificationFunction1,
+                        (VOID**)&NotifyHandle1); 
+
+  if (EFI_ERROR(Status)) {
+    Print(L"Error! Can't perform RegisterKeyNotify: %r", Status);
+    return Status;
+  }
+
+  return EFI_SUCCESS;
+}
-- 
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