summaryrefslogtreecommitdiff
path: root/MdeModulePkg/Universal/SetupBrowserDxe/ProcessOptions.c
blob: 2e77522ca17f0efe2c6c1fe6e26e0dafc92b7ed6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
/** @file
Implementation for handling the User Interface option processing.


Copyright (c) 2004 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "Setup.h"


/**
  Process Question Config.

  @param  Selection              The UI menu selection.
  @param  Question               The Question to be peocessed.

  @retval EFI_SUCCESS            Question Config process success.
  @retval Other                  Question Config process fail.

**/
EFI_STATUS
ProcessQuestionConfig (
  IN  UI_MENU_SELECTION       *Selection,
  IN  FORM_BROWSER_STATEMENT  *Question
  )
{
  EFI_STATUS                      Status;
  CHAR16                          *ConfigResp;
  CHAR16                          *Progress;
  EFI_HII_CONFIG_ACCESS_PROTOCOL  *ConfigAccess;

  if (Question->QuestionConfig == 0) {
    return EFI_SUCCESS;
  }

  //
  // Get <ConfigResp>
  //
  ConfigResp = GetToken (Question->QuestionConfig, Selection->FormSet->HiiHandle);
  if (ConfigResp == NULL) {
    return EFI_NOT_FOUND;
  }

  //
  // Send config to Configuration Driver
  //
  ConfigAccess = Selection->FormSet->ConfigAccess;
  if (ConfigAccess == NULL) {
    return EFI_UNSUPPORTED;
  }
  Status = ConfigAccess->RouteConfig (
                           ConfigAccess,
                           ConfigResp,
                           &Progress
                           );

  return Status;
}


/**
  Search an Option of a Question by its value.

  @param  Question               The Question
  @param  OptionValue            Value for Option to be searched.

  @retval Pointer                Pointer to the found Option.
  @retval NULL                   Option not found.

**/
QUESTION_OPTION *
ValueToOption (
  IN FORM_BROWSER_STATEMENT   *Question,
  IN EFI_HII_VALUE            *OptionValue
  )
{
  LIST_ENTRY       *Link;
  QUESTION_OPTION  *Option;

  Link = GetFirstNode (&Question->OptionListHead);
  while (!IsNull (&Question->OptionListHead, Link)) {
    Option = QUESTION_OPTION_FROM_LINK (Link);

    if (CompareHiiValue (&Option->Value, OptionValue, NULL) == 0) {
      return Option;
    }

    Link = GetNextNode (&Question->OptionListHead, Link);
  }

  return NULL;
}


/**
  Return data element in an Array by its Index.

  @param  Array                  The data array.
  @param  Type                   Type of the data in this array.
  @param  Index                  Zero based index for data in this array.

  @retval Value                  The data to be returned

**/
UINT64
GetArrayData (
  IN VOID                     *Array,
  IN UINT8                    Type,
  IN UINTN                    Index
  )
{
  UINT64 Data;

  ASSERT (Array != NULL);

  Data = 0;
  switch (Type) {
  case EFI_IFR_TYPE_NUM_SIZE_8:
    Data = (UINT64) *(((UINT8 *) Array) + Index);
    break;

  case EFI_IFR_TYPE_NUM_SIZE_16:
    Data = (UINT64) *(((UINT16 *) Array) + Index);
    break;

  case EFI_IFR_TYPE_NUM_SIZE_32:
    Data = (UINT64) *(((UINT32 *) Array) + Index);
    break;

  case EFI_IFR_TYPE_NUM_SIZE_64:
    Data = (UINT64) *(((UINT64 *) Array) + Index);
    break;

  default:
    break;
  }

  return Data;
}


/**
  Set value of a data element in an Array by its Index.

  @param  Array                  The data array.
  @param  Type                   Type of the data in this array.
  @param  Index                  Zero based index for data in this array.
  @param  Value                  The value to be set.

**/
VOID
SetArrayData (
  IN VOID                     *Array,
  IN UINT8                    Type,
  IN UINTN                    Index,
  IN UINT64                   Value
  )
{

  ASSERT (Array != NULL);

  switch (Type) {
  case EFI_IFR_TYPE_NUM_SIZE_8:
    *(((UINT8 *) Array) + Index) = (UINT8) Value;
    break;

  case EFI_IFR_TYPE_NUM_SIZE_16:
    *(((UINT16 *) Array) + Index) = (UINT16) Value;
    break;

  case EFI_IFR_TYPE_NUM_SIZE_32:
    *(((UINT32 *) Array) + Index) = (UINT32) Value;
    break;

  case EFI_IFR_TYPE_NUM_SIZE_64:
    *(((UINT64 *) Array) + Index) = (UINT64) Value;
    break;

  default:
    break;
  }
}


/**
  Print Question Value according to it's storage width and display attributes.

  @param  Question               The Question to be printed.
  @param  FormattedNumber        Buffer for output string.
  @param  BufferSize             The FormattedNumber buffer size in bytes.

  @retval EFI_SUCCESS            Print success.
  @retval EFI_BUFFER_TOO_SMALL   Buffer size is not enough for formatted number.

**/
EFI_STATUS
PrintFormattedNumber (
  IN FORM_BROWSER_STATEMENT   *Question,
  IN OUT CHAR16               *FormattedNumber,
  IN UINTN                    BufferSize
  )
{
  INT64          Value;
  CHAR16         *Format;
  EFI_HII_VALUE  *QuestionValue;

  if (BufferSize < (21 * sizeof (CHAR16))) {
    return EFI_BUFFER_TOO_SMALL;
  }

  QuestionValue = &Question->HiiValue;

  Value = (INT64) QuestionValue->Value.u64;
  switch (Question->Flags & EFI_IFR_DISPLAY) {
  case EFI_IFR_DISPLAY_INT_DEC:
    switch (QuestionValue->Type) {
    case EFI_IFR_NUMERIC_SIZE_1:
      Value = (INT64) ((INT8) QuestionValue->Value.u8);
      break;

    case EFI_IFR_NUMERIC_SIZE_2:
      Value = (INT64) ((INT16) QuestionValue->Value.u16);
      break;

    case EFI_IFR_NUMERIC_SIZE_4:
      Value = (INT64) ((INT32) QuestionValue->Value.u32);
      break;

    case EFI_IFR_NUMERIC_SIZE_8:
    default:
      break;
    }

    if (Value < 0) {
      Value = -Value;
      Format = L"-%ld";
    } else {
      Format = L"%ld";
    }
    break;

  case EFI_IFR_DISPLAY_UINT_DEC:
    Format = L"%ld";
    break;

  case EFI_IFR_DISPLAY_UINT_HEX:
    Format = L"%lx";
    break;

  default:
    return EFI_UNSUPPORTED;
    break;
  }

  UnicodeSPrint (FormattedNumber, BufferSize, Format, Value);

  return EFI_SUCCESS;
}


/**
  Password may be stored as encrypted by Configuration Driver. When change a
  password, user will be challenged with old password. To validate user input old
  password, we will send the clear text to Configuration Driver via Callback().
  Configuration driver is responsible to check the passed in password and return
  the validation result. If validation pass, state machine in password Callback()
  will transit from BROWSER_STATE_VALIDATE_PASSWORD to BROWSER_STATE_SET_PASSWORD.
  After user type in new password twice, Callback() will be invoked to send the
  new password to Configuration Driver.

  @param  Selection              Pointer to UI_MENU_SELECTION.
  @param  MenuOption             The MenuOption for this password Question.
  @param  String                 The clear text of password.

  @retval EFI_NOT_AVAILABLE_YET  Callback() request to terminate password input.
  @return In state of BROWSER_STATE_VALIDATE_PASSWORD:
  @retval EFI_SUCCESS            Password correct, Browser will prompt for new
                                 password.
  @retval EFI_NOT_READY          Password incorrect, Browser will show error
                                 message.
  @retval Other                  Browser will do nothing.
  @return In state of BROWSER_STATE_SET_PASSWORD:
  @retval EFI_SUCCESS            Set password success.
  @retval Other                  Set password failed.

**/
EFI_STATUS
PasswordCallback (
  IN  UI_MENU_SELECTION           *Selection,
  IN  UI_MENU_OPTION              *MenuOption,
  IN  CHAR16                      *String
  )
{
  EFI_STATUS                      Status;
  EFI_HII_CONFIG_ACCESS_PROTOCOL  *ConfigAccess;
  EFI_BROWSER_ACTION_REQUEST      ActionRequest;
  EFI_IFR_TYPE_VALUE              IfrTypeValue;

  ConfigAccess = Selection->FormSet->ConfigAccess;
  if (ConfigAccess == NULL) {
    return EFI_UNSUPPORTED;
  }

  //
  // Prepare password string in HII database
  //
  if (String != NULL) {
    IfrTypeValue.string = NewString (String, Selection->FormSet->HiiHandle);
  } else {
    IfrTypeValue.string = 0;
  }

  //
  // Send password to Configuration Driver for validation
  //
  Status = ConfigAccess->Callback (
                           ConfigAccess,
                           EFI_BROWSER_ACTION_CHANGING,
                           MenuOption->ThisTag->QuestionId,
                           MenuOption->ThisTag->HiiValue.Type,
                           &IfrTypeValue,
                           &ActionRequest
                           );

  //
  // Remove password string from HII database
  //
  if (String != NULL) {
    DeleteString (IfrTypeValue.string, Selection->FormSet->HiiHandle);
  }

  return Status;
}


/**
  Display error message for invalid password.

**/
VOID
PasswordInvalid (
  VOID
  )
{
  EFI_INPUT_KEY  Key;

  //
  // Invalid password, prompt error message
  //
  do {
    CreateDialog (4, TRUE, 0, NULL, &Key, gEmptyString, gPassowordInvalid, gPressEnter, gEmptyString);
  } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);
}


/**
  Process a Question's Option (whether selected or un-selected).

  @param  Selection              Pointer to UI_MENU_SELECTION.
  @param  MenuOption             The MenuOption for this Question.
  @param  Selected               TRUE: if Question is selected.
  @param  OptionString           Pointer of the Option String to be displayed.

  @retval EFI_SUCCESS            Question Option process success.
  @retval Other                  Question Option process fail.

**/
EFI_STATUS
ProcessOptions (
  IN  UI_MENU_SELECTION           *Selection,
  IN  UI_MENU_OPTION              *MenuOption,
  IN  BOOLEAN                     Selected,
  OUT CHAR16                      **OptionString
  )
{
  EFI_STATUS                      Status;
  CHAR16                          *StringPtr;
  CHAR16                          *TempString;
  UINTN                           Index;
  FORM_BROWSER_STATEMENT          *Question;
  CHAR16                          FormattedNumber[21];
  UINT16                          Number;
  CHAR16                          Character[2];
  EFI_INPUT_KEY                   Key;
  UINTN                           BufferSize;
  QUESTION_OPTION                 *OneOfOption;
  LIST_ENTRY                      *Link;
  EFI_HII_VALUE                   HiiValue;
  EFI_HII_VALUE                   *QuestionValue;
  BOOLEAN                         Suppress;
  UINT16                          Maximum;
  QUESTION_OPTION                 *Option;
  UINTN                           Index2;
  UINT8                           *ValueArray;
  UINT8                           ValueType;
  EFI_STRING_ID                   StringId;

  Status        = EFI_SUCCESS;

  StringPtr     = NULL;
  Character[1]  = L'\0';
  *OptionString = NULL;
  StringId      = 0;

  ZeroMem (FormattedNumber, 21 * sizeof (CHAR16));
  BufferSize = (gOptionBlockWidth + 1) * 2 * gScreenDimensions.BottomRow;

  Question = MenuOption->ThisTag;
  QuestionValue = &Question->HiiValue;
  Maximum = (UINT16) Question->Maximum;

  ValueArray = Question->BufferValue;
  ValueType = Question->ValueType;

  switch (Question->Operand) {
  case EFI_IFR_ORDERED_LIST_OP:
    //
    // Check whether there are Options of this OrderedList
    //
    if (IsListEmpty (&Question->OptionListHead)) {
      break;
    }
    //
    // Initialize Option value array
    //
    if (GetArrayData (ValueArray, ValueType, 0) == 0) {
      GetQuestionDefault (Selection->FormSet, Selection->Form, Question, 0);
    }

    if (Selected) {
      //
      // Go ask for input
      //
      Status = GetSelectionInputPopUp (Selection, MenuOption);
    } else {
      //
      // We now know how many strings we will have, so we can allocate the
      // space required for the array or strings.
      //
      *OptionString = AllocateZeroPool (Question->MaxContainers * BufferSize);
      ASSERT (*OptionString);

      HiiValue.Type = ValueType;
      HiiValue.Value.u64 = 0;
      for (Index = 0; Index < Question->MaxContainers; Index++) {
        HiiValue.Value.u64 = GetArrayData (ValueArray, ValueType, Index);
        if (HiiValue.Value.u64 == 0) {
          //
          // Values for the options in ordered lists should never be a 0
          //
          break;
        }

        OneOfOption = ValueToOption (Question, &HiiValue);
        if (OneOfOption == NULL) {
          //
          // Show error message
          //
          do {
            CreateDialog (4, TRUE, 0, NULL, &Key, gEmptyString, gOptionMismatch, gPressEnter, gEmptyString);
          } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

          //
          // The initial value of the orderedlist is invalid, force to be valid value
          //
          Link = GetFirstNode (&Question->OptionListHead);
          Index2 = 0;
          while (!IsNull (&Question->OptionListHead, Link) && Index2 < Question->MaxContainers) {
            Option = QUESTION_OPTION_FROM_LINK (Link);
            SetArrayData (ValueArray, ValueType, Index2, Option->Value.Value.u64);
            Index2++;
            Link = GetNextNode (&Question->OptionListHead, Link);
          }
          SetArrayData (ValueArray, ValueType, Index2, 0);

          Status = SetQuestionValue (Selection->FormSet, Selection->Form, Question, TRUE);
          UpdateStatusBar (NV_UPDATE_REQUIRED, Question->QuestionFlags, TRUE);

          FreePool (*OptionString);
          *OptionString = NULL;
          return EFI_NOT_FOUND;
        }

        Suppress = FALSE;
        if ((OneOfOption->SuppressExpression != NULL) &&
            (OneOfOption->SuppressExpression->Result.Value.b)) {
          //
          // This option is suppressed
          //
          Suppress = TRUE;
        }

        if (!Suppress) {
          Character[0] = LEFT_ONEOF_DELIMITER;
          NewStrCat (OptionString[0], Character);
          StringPtr = GetToken (OneOfOption->Text, Selection->Handle);
          NewStrCat (OptionString[0], StringPtr);
          Character[0] = RIGHT_ONEOF_DELIMITER;
          NewStrCat (OptionString[0], Character);
          Character[0] = CHAR_CARRIAGE_RETURN;
          NewStrCat (OptionString[0], Character);

          FreePool (StringPtr);
        }
      }
    }
    break;

  case EFI_IFR_ONE_OF_OP:
    //
    // Check whether there are Options of this OneOf
    //
    if (IsListEmpty (&Question->OptionListHead)) {
      break;
    }
    if (Selected) {
      //
      // Go ask for input
      //
      Status = GetSelectionInputPopUp (Selection, MenuOption);
    } else {
      *OptionString = AllocateZeroPool (BufferSize);
      ASSERT (*OptionString);

      OneOfOption = ValueToOption (Question, QuestionValue);
      if (OneOfOption == NULL) {
        //
        // Show error message
        //
        do {
          CreateDialog (4, TRUE, 0, NULL, &Key, gEmptyString, gOptionMismatch, gPressEnter, gEmptyString);
        } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

        //
        // Force the Question value to be valid
        //
        Link = GetFirstNode (&Question->OptionListHead);
        while (!IsNull (&Question->OptionListHead, Link)) {
          Option = QUESTION_OPTION_FROM_LINK (Link);

          if ((Option->SuppressExpression == NULL) ||
              !Option->SuppressExpression->Result.Value.b) {
            CopyMem (QuestionValue, &Option->Value, sizeof (EFI_HII_VALUE));
            SetQuestionValue (Selection->FormSet, Selection->Form, Question, TRUE);
            UpdateStatusBar (NV_UPDATE_REQUIRED, Question->QuestionFlags, TRUE);
            break;
          }

          Link = GetNextNode (&Question->OptionListHead, Link);
        }

        FreePool (*OptionString);
        *OptionString = NULL;
        return EFI_NOT_FOUND;
      }

      if ((OneOfOption->SuppressExpression != NULL) &&
          (OneOfOption->SuppressExpression->Result.Value.b)) {
        //
        // This option is suppressed
        //
        Suppress = TRUE;
      } else {
        Suppress = FALSE;
      }

      if (Suppress) {
        //
        // Current selected option happen to be suppressed,
        // enforce to select on a non-suppressed option
        //
        Link = GetFirstNode (&Question->OptionListHead);
        while (!IsNull (&Question->OptionListHead, Link)) {
          OneOfOption = QUESTION_OPTION_FROM_LINK (Link);

          if ((OneOfOption->SuppressExpression == NULL) ||
              !OneOfOption->SuppressExpression->Result.Value.b) {
            Suppress = FALSE;
            CopyMem (QuestionValue, &OneOfOption->Value, sizeof (EFI_HII_VALUE));
            SetQuestionValue (Selection->FormSet, Selection->Form, Question, TRUE);
            UpdateStatusBar (NV_UPDATE_REQUIRED, Question->QuestionFlags, TRUE);
            gST->ConOut->SetAttribute (gST->ConOut, PcdGet8 (PcdBrowserFieldTextColor) | FIELD_BACKGROUND);
            break;
          }

          Link = GetNextNode (&Question->OptionListHead, Link);
        }
      }

      if (!Suppress) {
        Character[0] = LEFT_ONEOF_DELIMITER;
        NewStrCat (OptionString[0], Character);
        StringPtr = GetToken (OneOfOption->Text, Selection->Handle);
        NewStrCat (OptionString[0], StringPtr);
        Character[0] = RIGHT_ONEOF_DELIMITER;
        NewStrCat (OptionString[0], Character);

        FreePool (StringPtr);
      }
    }
    break;

  case EFI_IFR_CHECKBOX_OP:
    *OptionString = AllocateZeroPool (BufferSize);
    ASSERT (*OptionString);

    *OptionString[0] = LEFT_CHECKBOX_DELIMITER;

    if (Selected) {
      //
      // Since this is a BOOLEAN operation, flip it upon selection
      //
      QuestionValue->Value.b = (BOOLEAN) (QuestionValue->Value.b ? FALSE : TRUE);

      //
      // Perform inconsistent check
      //
      Status = ValidateQuestion (Selection->FormSet, Selection->Form, Question, EFI_HII_EXPRESSION_INCONSISTENT_IF);
      if (EFI_ERROR (Status)) {
        //
        // Inconsistent check fail, restore Question Value
        //
        QuestionValue->Value.b = (BOOLEAN) (QuestionValue->Value.b ? FALSE : TRUE);
        FreePool (*OptionString);
        *OptionString = NULL;
        return Status;
      }

      //
      // Save Question value
      //
      Status = SetQuestionValue (Selection->FormSet, Selection->Form, Question, TRUE);
      UpdateStatusBar (NV_UPDATE_REQUIRED, Question->QuestionFlags, TRUE);
    }

    if (QuestionValue->Value.b) {
      *(OptionString[0] + 1) = CHECK_ON;
    } else {
      *(OptionString[0] + 1) = CHECK_OFF;
    }
    *(OptionString[0] + 2) = RIGHT_CHECKBOX_DELIMITER;
    break;

  case EFI_IFR_NUMERIC_OP:
    if (Selected) {
      //
      // Go ask for input
      //
      Status = GetNumericInput (Selection, MenuOption);
    } else {
      *OptionString = AllocateZeroPool (BufferSize);
      ASSERT (*OptionString);

      *OptionString[0] = LEFT_NUMERIC_DELIMITER;

      //
      // Formatted print
      //
      PrintFormattedNumber (Question, FormattedNumber, 21 * sizeof (CHAR16));
      Number = (UINT16) GetStringWidth (FormattedNumber);
      CopyMem (OptionString[0] + 1, FormattedNumber, Number);

      *(OptionString[0] + Number / 2) = RIGHT_NUMERIC_DELIMITER;
    }
    break;

  case EFI_IFR_DATE_OP:
    if (Selected) {
      //
      // This is similar to numerics
      //
      Status = GetNumericInput (Selection, MenuOption);
    } else {
      *OptionString = AllocateZeroPool (BufferSize);
      ASSERT (*OptionString);

      switch (MenuOption->Sequence) {
      case 0:
        *OptionString[0] = LEFT_NUMERIC_DELIMITER;
        UnicodeSPrint (OptionString[0] + 1, 21 * sizeof (CHAR16), L"%02d", QuestionValue->Value.date.Month);
        *(OptionString[0] + 3) = DATE_SEPARATOR;
        break;

      case 1:
        SetUnicodeMem (OptionString[0], 4, L' ');
        UnicodeSPrint (OptionString[0] + 4, 21 * sizeof (CHAR16), L"%02d", QuestionValue->Value.date.Day);
        *(OptionString[0] + 6) = DATE_SEPARATOR;
        break;

      case 2:
        SetUnicodeMem (OptionString[0], 7, L' ');
        UnicodeSPrint (OptionString[0] + 7, 21 * sizeof (CHAR16), L"%4d", QuestionValue->Value.date.Year);
        *(OptionString[0] + 11) = RIGHT_NUMERIC_DELIMITER;
        break;
      }
    }
    break;

  case EFI_IFR_TIME_OP:
    if (Selected) {
      //
      // This is similar to numerics
      //
      Status = GetNumericInput (Selection, MenuOption);
    } else {
      *OptionString = AllocateZeroPool (BufferSize);
      ASSERT (*OptionString);

      switch (MenuOption->Sequence) {
      case 0:
        *OptionString[0] = LEFT_NUMERIC_DELIMITER;
        UnicodeSPrint (OptionString[0] + 1, 21 * sizeof (CHAR16), L"%02d", QuestionValue->Value.time.Hour);
        *(OptionString[0] + 3) = TIME_SEPARATOR;
        break;

      case 1:
        SetUnicodeMem (OptionString[0], 4, L' ');
        UnicodeSPrint (OptionString[0] + 4, 21 * sizeof (CHAR16), L"%02d", QuestionValue->Value.time.Minute);
        *(OptionString[0] + 6) = TIME_SEPARATOR;
        break;

      case 2:
        SetUnicodeMem (OptionString[0], 7, L' ');
        UnicodeSPrint (OptionString[0] + 7, 21 * sizeof (CHAR16), L"%02d", QuestionValue->Value.time.Second);
        *(OptionString[0] + 9) = RIGHT_NUMERIC_DELIMITER;
        break;
      }
    }
    break;

  case EFI_IFR_STRING_OP:
    if (Selected) {
      StringPtr = AllocateZeroPool ((Maximum + 1) * sizeof (CHAR16));
      ASSERT (StringPtr);

      Status = ReadString (MenuOption, gPromptForData, StringPtr);
      if (!EFI_ERROR (Status)) {
        HiiSetString(Selection->FormSet->HiiHandle, Question->HiiValue.Value.string, StringPtr, NULL);
        Status = ValidateQuestion(Selection->FormSet, Selection->Form, Question, EFI_HII_EXPRESSION_INCONSISTENT_IF);
        if (EFI_ERROR (Status)) {
          HiiSetString(Selection->FormSet->HiiHandle, Question->HiiValue.Value.string, (CHAR16*)Question->BufferValue, NULL);
        } else {
          CopyMem (Question->BufferValue, StringPtr, Maximum * sizeof (CHAR16));
          SetQuestionValue (Selection->FormSet, Selection->Form, Question, TRUE);

          UpdateStatusBar (NV_UPDATE_REQUIRED, Question->QuestionFlags, TRUE);
        }
      }

      FreePool (StringPtr);
    } else {
      *OptionString = AllocateZeroPool (BufferSize);
      ASSERT (*OptionString);

      if (((CHAR16 *) Question->BufferValue)[0] == 0x0000) {
        *(OptionString[0]) = '_';
      } else {
        if ((Maximum * sizeof (CHAR16)) < BufferSize) {
          BufferSize = Maximum * sizeof (CHAR16);
        }
        CopyMem (OptionString[0], (CHAR16 *) Question->BufferValue, BufferSize);
      }
    }
    break;

  case EFI_IFR_PASSWORD_OP:
    if (Selected) {
      StringPtr = AllocateZeroPool ((Maximum + 1) * sizeof (CHAR16));
      ASSERT (StringPtr);

      //
      // For interactive passwords, old password is validated by callback
      //
      if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK)  != 0) {
        //
        // Use a NULL password to test whether old password is required
        //
        *StringPtr = 0;
        Status = PasswordCallback (Selection, MenuOption, StringPtr);
        if (Status == EFI_NOT_AVAILABLE_YET || Status == EFI_UNSUPPORTED) {
          //
          // Callback is not supported, or
          // Callback request to terminate password input
          //
          FreePool (StringPtr);
          return EFI_SUCCESS;
        }

        if (EFI_ERROR (Status)) {
          //
          // Old password exist, ask user for the old password
          //
          Status = ReadString (MenuOption, gPromptForPassword, StringPtr);
          if (EFI_ERROR (Status)) {
            FreePool (StringPtr);
            return Status;
          }

          //
          // Check user input old password
          //
          Status = PasswordCallback (Selection, MenuOption, StringPtr);
          if (EFI_ERROR (Status)) {
            if (Status == EFI_NOT_READY) {
              //
              // Typed in old password incorrect
              //
              PasswordInvalid ();
            } else {
              Status = EFI_SUCCESS;
            }

            FreePool (StringPtr);
            return Status;
          }
        }
      } else {
        //
        // For non-interactive password, validate old password in local
        //
        if (*((CHAR16 *) Question->BufferValue) != 0) {
          //
          // There is something there!  Prompt for password
          //
          Status = ReadString (MenuOption, gPromptForPassword, StringPtr);
          if (EFI_ERROR (Status)) {
            FreePool (StringPtr);
            return Status;
          }

          TempString = AllocateCopyPool ((Maximum + 1) * sizeof (CHAR16), Question->BufferValue);
          ASSERT (TempString != NULL);

          TempString[Maximum] = L'\0';

          if (StrCmp (StringPtr, TempString) != 0) {
            //
            // Typed in old password incorrect
            //
            PasswordInvalid ();

            FreePool (StringPtr);
            FreePool (TempString);
            return Status;
          }

          FreePool (TempString);
        }
      }

      //
      // Ask for new password
      //
      ZeroMem (StringPtr, (Maximum + 1) * sizeof (CHAR16));
      Status = ReadString (MenuOption, gPromptForNewPassword, StringPtr);
      if (EFI_ERROR (Status)) {
        //
        // Reset state machine for interactive password
        //
        if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
          PasswordCallback (Selection, MenuOption, NULL);
        }

        FreePool (StringPtr);
        return Status;
      }

      //
      // Confirm new password
      //
      TempString = AllocateZeroPool ((Maximum + 1) * sizeof (CHAR16));
      ASSERT (TempString);
      Status = ReadString (MenuOption, gConfirmPassword, TempString);
      if (EFI_ERROR (Status)) {
        //
        // Reset state machine for interactive password
        //
        if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
          PasswordCallback (Selection, MenuOption, NULL);
        }

        FreePool (StringPtr);
        FreePool (TempString);
        return Status;
      }

      //
      // Compare two typed-in new passwords
      //
      if (StrCmp (StringPtr, TempString) == 0) {
        //
        // Prepare the  Question->HiiValue.Value.string for ValidateQuestion use.
        //
        if((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
          StringId = Question->HiiValue.Value.string;
          Question->HiiValue.Value.string = NewString (StringPtr, Selection->FormSet->HiiHandle);
        } else {
          HiiSetString(Selection->FormSet->HiiHandle, Question->HiiValue.Value.string, StringPtr, NULL);
        }
        
        Status = ValidateQuestion(Selection->FormSet, Selection->Form, Question, EFI_HII_EXPRESSION_INCONSISTENT_IF);

        //
        //  Researve the Question->HiiValue.Value.string.
        //
        if((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
          DeleteString(Question->HiiValue.Value.string, Selection->FormSet->HiiHandle);
          Question->HiiValue.Value.string = StringId;
        }   
        
        if (EFI_ERROR (Status)) {
          //
          // Reset state machine for interactive password
          //
          if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
            PasswordCallback (Selection, MenuOption, NULL);
          } else {
            //
            // Researve the Question->HiiValue.Value.string.
            //
            HiiSetString(Selection->FormSet->HiiHandle, Question->HiiValue.Value.string, (CHAR16*)Question->BufferValue, NULL);            
          }
        } else {
          //
          // Two password match, send it to Configuration Driver
          //
          if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
            PasswordCallback (Selection, MenuOption, StringPtr);
          } else {
            CopyMem (Question->BufferValue, StringPtr, Maximum * sizeof (CHAR16));
            SetQuestionValue (Selection->FormSet, Selection->Form, Question, FALSE);
          }
        }
      } else {
        //
        // Reset state machine for interactive password
        //
        if ((Question->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
          PasswordCallback (Selection, MenuOption, NULL);
        }

        //
        // Two password mismatch, prompt error message
        //
        do {
          CreateDialog (4, TRUE, 0, NULL, &Key, gEmptyString, gConfirmError, gPressEnter, gEmptyString);
        } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);
      }

      FreePool (TempString);
      FreePool (StringPtr);
    }
    break;

  default:
    break;
  }

  return Status;
}


/**
  Process the help string: Split StringPtr to several lines of strings stored in
  FormattedString and the glyph width of each line cannot exceed gHelpBlockWidth.

  @param  StringPtr              The entire help string.
  @param  FormattedString        The oupput formatted string.
  @param  RowCount               TRUE: if Question is selected.

**/
VOID
ProcessHelpString (
  IN  CHAR16  *StringPtr,
  OUT CHAR16  **FormattedString,
  IN  UINTN   RowCount
  )
{
  UINTN BlockWidth;
  UINTN AllocateSize;
  //
  // [PrevCurrIndex, CurrIndex) forms a range of a screen-line
  //
  UINTN CurrIndex;
  UINTN PrevCurrIndex;
  UINTN LineCount;
  UINTN VirtualLineCount;
  //
  // GlyphOffset stores glyph width of current screen-line
  //
  UINTN GlyphOffset;
  //
  // GlyphWidth equals to 2 if we meet width directive
  //
  UINTN GlyphWidth;
  //
  // during scanning, we remember the position of last space character
  // in case that if next word cannot put in current line, we could restore back to the position
  // of last space character
  // while we should also remmeber the glyph width of the last space character for restoring
  //
  UINTN LastSpaceIndex;
  UINTN LastSpaceGlyphWidth;
  //
  // every time we begin to form a new screen-line, we should remember glyph width of single character
  // of last line
  //
  UINTN LineStartGlyphWidth;
  UINTN *IndexArray;
  UINTN *OldIndexArray;

  BlockWidth = (UINTN) gHelpBlockWidth - 1;

  //
  // every three elements of IndexArray form a screen-line of string:[ IndexArray[i*3], IndexArray[i*3+1] )
  // IndexArray[i*3+2] stores the initial glyph width of single character. to save this is because we want
  // to bring the width directive of the last line to current screen-line.
  // e.g.: "\wideabcde ... fghi", if "fghi" also has width directive but is splitted to the next screen-line
  // different from that of "\wideabcde", we should remember the width directive.
  //
  AllocateSize  = 0x20;
  IndexArray    = AllocatePool (AllocateSize * sizeof (UINTN) * 3);
  ASSERT (IndexArray != NULL);

  if (*FormattedString != NULL) {
    FreePool (*FormattedString);
    *FormattedString = NULL;
  }

  for (PrevCurrIndex = 0, CurrIndex  = 0, LineCount   = 0, LastSpaceIndex = 0,
       IndexArray[0] = 0, GlyphWidth = 1, GlyphOffset = 0, LastSpaceGlyphWidth = 1, LineStartGlyphWidth = 1;
       (StringPtr[CurrIndex] != CHAR_NULL);
       CurrIndex ++) {

    if (LineCount == AllocateSize) {
      AllocateSize += 0x10;
      OldIndexArray  = IndexArray;
      IndexArray = AllocatePool (AllocateSize * sizeof (UINTN) * 3);
      ASSERT (IndexArray != NULL);

      CopyMem (IndexArray, OldIndexArray, LineCount * sizeof (UINTN) * 3);
      FreePool (OldIndexArray);
    }
    switch (StringPtr[CurrIndex]) {

      case NARROW_CHAR:
      case WIDE_CHAR:
        GlyphWidth = ((StringPtr[CurrIndex] == WIDE_CHAR) ? 2 : 1);
        if (CurrIndex == 0) {
          LineStartGlyphWidth = GlyphWidth;
        }
        break;

      //
      // char is '\n'
      // "\r\n" isn't handled here, handled by case CHAR_CARRIAGE_RETURN
      //
      case CHAR_LINEFEED:
        //
        // Store a range of string as a line
        //
        IndexArray[LineCount*3]   = PrevCurrIndex;
        IndexArray[LineCount*3+1] = CurrIndex;
        IndexArray[LineCount*3+2] = LineStartGlyphWidth;
        LineCount ++;
        //
        // Reset offset and save begin position of line
        //
        GlyphOffset = 0;
        LineStartGlyphWidth = GlyphWidth;
        PrevCurrIndex = CurrIndex + 1;
        break;

      //
      // char is '\r'
      // "\r\n" and "\r" both are handled here
      //
      case CHAR_CARRIAGE_RETURN:
        if (StringPtr[CurrIndex + 1] == CHAR_LINEFEED) {
          //
          // next char is '\n'
          //
          IndexArray[LineCount*3]   = PrevCurrIndex;
          IndexArray[LineCount*3+1] = CurrIndex;
          IndexArray[LineCount*3+2] = LineStartGlyphWidth;
          LineCount ++;
          CurrIndex ++;
        }
        GlyphOffset = 0;
        LineStartGlyphWidth = GlyphWidth;
        PrevCurrIndex = CurrIndex + 1;
        break;

      //
      // char is space or other char
      //
      default:
        GlyphOffset     += GlyphWidth;
        if (GlyphOffset >= BlockWidth) {
          if (LastSpaceIndex > PrevCurrIndex) {
            //
            // LastSpaceIndex points to space inside current screen-line,
            // restore to LastSpaceIndex
            // (Otherwise the word is too long to fit one screen-line, just cut it)
            //
            CurrIndex  = LastSpaceIndex;
            GlyphWidth = LastSpaceGlyphWidth;
          } else if (GlyphOffset > BlockWidth) {
            //
            // the word is too long to fit one screen-line and we don't get the chance
            // of GlyphOffset == BlockWidth because GlyphWidth = 2
            //
            CurrIndex --;
          }

          IndexArray[LineCount*3]   = PrevCurrIndex;
          IndexArray[LineCount*3+1] = CurrIndex + 1;
          IndexArray[LineCount*3+2] = LineStartGlyphWidth;
          LineStartGlyphWidth = GlyphWidth;
          LineCount ++;
          //
          // Reset offset and save begin position of line
          //
          GlyphOffset                 = 0;
          PrevCurrIndex               = CurrIndex + 1;
        }

        //
        // LastSpaceIndex: remember position of last space
        //
        if (StringPtr[CurrIndex] == CHAR_SPACE) {
          LastSpaceIndex      = CurrIndex;
          LastSpaceGlyphWidth = GlyphWidth;
        }
        break;
    }
  }

  if (GlyphOffset > 0) {
    IndexArray[LineCount*3]   = PrevCurrIndex;
    IndexArray[LineCount*3+1] = CurrIndex;
    IndexArray[LineCount*3+2] = GlyphWidth;
    LineCount ++;
  }

  if (LineCount == 0) {
    //
    // in case we meet null string
    //
    IndexArray[0] = 0;
    IndexArray[1] = 1;
    //
    // we assume null string's glyph width is 1
    //
    IndexArray[1] = 1;
    LineCount ++;
  }

  VirtualLineCount = RowCount * (LineCount / RowCount + (LineCount % RowCount > 0));
  *FormattedString = AllocateZeroPool (VirtualLineCount * (BlockWidth + 1) * sizeof (CHAR16) * 2);
  ASSERT (*FormattedString != NULL);

  for (CurrIndex = 0; CurrIndex < LineCount; CurrIndex ++) {
    *(*FormattedString + CurrIndex * 2 * (BlockWidth + 1)) = (CHAR16) ((IndexArray[CurrIndex*3+2] == 2) ? WIDE_CHAR : NARROW_CHAR);
    StrnCpy (
      *FormattedString + CurrIndex * 2 * (BlockWidth + 1) + 1,
      StringPtr + IndexArray[CurrIndex*3],
      IndexArray[CurrIndex*3+1]-IndexArray[CurrIndex*3]
      );
  }

  FreePool (IndexArray);
}