OvmfPkg: PlatformDxe: add save and discard buttons to the form

The RouteConfig() function is also called now as expected.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15373 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/PlatformDxe/Platform.c

@@ -185,6 +185,8 @@ RouteConfig (
   OUT       EFI_STRING                      *Progress
 )
 {
+  DEBUG ((EFI_D_VERBOSE, "%a: Configuration=\"%s\"\n", __FUNCTION__,
+    Configuration));
   return EFI_SUCCESS;
 }
 
@@ -201,6 +203,26 @@ Callback (
   OUT    EFI_BROWSER_ACTION_REQUEST             *ActionRequest
   )
 {
+  DEBUG ((EFI_D_VERBOSE, "%a: Action=0x%Lx QuestionId=%d Type=%d\n",
+    __FUNCTION__, (UINT64) Action, QuestionId, Type));
+
+  if (Action != EFI_BROWSER_ACTION_CHANGED) {
+    return EFI_UNSUPPORTED;
+  }
+
+  switch (QuestionId) {
+  case QUESTION_SAVE_EXIT:
+    *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
+    break;
+
+  case QUESTION_DISCARD_EXIT:
+    *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
+    break;
+
+  default:
+    break;
+  }
+
   return EFI_SUCCESS;
 }