#include <Uefi.h>

#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/OcCryptoLib.h>
#include <Library/OcMiscLib.h>
#include <Library/ResetSystemLib.h>
#include <Library/UefiBootServicesTableLib.h>

#include "../OpenCanopy.h"
#include "../GuiApp.h"
#include "../GuiIo.h"
#include "BootPicker.h"

#include "Common.h"

#define PASSWORD_FIRST_DOT_SPACE  11U
//
// Due to the embedded ENTER button of the 'Modern' theme, the last dot needs
// less padding.
//
#define PASSWORD_LAST_DOT_SPACE   9U
#define PASSWORD_INTER_DOT_SPACE  5U
//
// Offset the ENTER button is offset into the right end of the password prompt.
//
#define PASSWORD_ENTER_INTERNAL_OFFSET  25U
//
// Space between the password lock and the password box.
//
#define PASSWORD_BOX_SPACE  30U

typedef struct {
  CHAR8    Password[OC_PASSWORD_MAX_LEN];
  UINT8    PasswordLen;
} GUI_PASSWORD_INFO;

typedef struct {
  GUI_OBJ_CHILD        Hdr;
  GUI_PASSWORD_INFO    PasswordInfo;
  BOOLEAN              RequestConfirm;
  UINT8                MaxPasswordDots;
} GUI_PASSWORD_BOX;

extern GUI_KEY_CONTEXT  *mKeyContext;

extern GUI_PASSWORD_BOX   mPasswordBox;
extern GUI_OBJ_CLICKABLE  mPasswordEnter;
extern GUI_OBJ_CHILD      mPasswordLock;
extern GUI_OBJ_CHILD      mPasswordBoxContainer;

// FIXME: Create one context for drawing, pointers, and keys.
extern GUI_POINTER_CONTEXT  *mPointerContext;

STATIC GUI_INTERPOLATION  mPasswordIncorrectInterpol = {
  GuiInterpolTypeLinear,
  0,
  3,
  0,
  0,
  0
};

STATIC GUI_OBJ  *mPasswordFocusList[] = {
  &mPasswordBoxContainer.Obj,
  &mCommonRestart.Hdr.Obj,
  &mCommonShutDown.Hdr.Obj
};

STATIC GUI_OBJ  *mPasswordFocusListMinimal[] = {
  &mPasswordBoxContainer.Obj
};

STATIC UINT8  mPasswordNumTries = 0;

STATIC
VOID
InternalInitPasswordIncorrectInterpol (
  IN CONST GUI_DRAWING_CONTEXT  *DrawContext,
  IN UINT64                     StartTime
  )
{
  mPasswordIncorrectInterpol.StartTime = StartTime;
  mPasswordIncorrectInterpol.EndValue  = 20 * DrawContext->Scale;
}

BOOLEAN
InternalPasswordAnimateIncorrect (
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     UINT64                   CurrentTime
  )
{
  STATIC UINT32   LastOff   = 0;
  STATIC BOOLEAN  Left      = FALSE;
  STATIC UINT8    Iteration = 0;

  UINT32  DeltaOrig;
  UINT32  DeltaAdd;

  DeltaOrig = GuiGetInterpolatedValue (
                &mPasswordIncorrectInterpol,
                CurrentTime
                );
  DeltaAdd = DeltaOrig - LastOff;
  LastOff  = DeltaOrig;

  if (Left) {
    mPasswordBoxContainer.Obj.OffsetX -= DeltaAdd;
    GuiRequestDraw (
      (UINT32)mPasswordBoxContainer.Obj.OffsetX,
      (UINT32)mPasswordBoxContainer.Obj.OffsetY,
      mPasswordBoxContainer.Obj.Width + DeltaAdd,
      mPasswordBoxContainer.Obj.Height
      );
  } else {
    GuiRequestDraw (
      (UINT32)mPasswordBoxContainer.Obj.OffsetX,
      (UINT32)mPasswordBoxContainer.Obj.OffsetY,
      mPasswordBoxContainer.Obj.Width + DeltaAdd,
      mPasswordBoxContainer.Obj.Height
      );
    mPasswordBoxContainer.Obj.OffsetX += DeltaAdd;
  }

  if (CurrentTime - mPasswordIncorrectInterpol.StartTime >= mPasswordIncorrectInterpol.Duration) {
    LastOff = 0;

    if (Iteration == 5) {
      Iteration                      = 0;
      mPasswordEnter.Hdr.Obj.Opacity = 0xFF;
      return TRUE;
    }

    mPasswordIncorrectInterpol.StartTime = CurrentTime + 1;
    ++Iteration;
    //
    // Left/Right start toggles between tries.
    //
    Left = !Left;
  }

  return FALSE;
}

STATIC
VOID
InternalQueueIncorrectPassword (
  OUT GUI_DRAWING_CONTEXT  *DrawContext
  )
{
  STATIC GUI_ANIMATION  PwAnim = {
    INITIALIZE_LIST_HEAD_VARIABLE (PwAnim.Link),
    NULL,
    InternalPasswordAnimateIncorrect
  };

  if (!IsNodeInList (&PwAnim.Link, &DrawContext->Animations)) {
    InternalInitPasswordIncorrectInterpol (DrawContext, DrawContext->FrameTime);
    InsertHeadList (&DrawContext->Animations, &PwAnim.Link);
  }
}

STATIC
VOID
InternalRedrawPaswordBox (
  VOID
  )
{
  GuiRequestDraw (
    (UINT32)mPasswordBoxContainer.Obj.OffsetX,
    (UINT32)mPasswordBoxContainer.Obj.OffsetY,
    mPasswordBoxContainer.Obj.Width,
    mPasswordBoxContainer.Obj.Height
    );
}

BOOLEAN
InternalConfirmPassword (
  IN OUT GUI_DRAWING_CONTEXT            *DrawContext,
  IN     CONST BOOT_PICKER_GUI_CONTEXT  *Context
  )
{
  BOOLEAN                     Result;
  CONST OC_PRIVILEGE_CONTEXT  *Privilege;
  GUI_PTR_POSITION            PtrPosition;

  if (mPointerContext != NULL) {
    GuiPointerGetPosition (mPointerContext, &PtrPosition);
  }

  Privilege = Context->PickerContext->PrivilegeContext;

  Result = Context->PickerContext->VerifyPassword (
                                     (CONST UINT8 *)mPasswordBox.PasswordInfo.Password,
                                     mPasswordBox.PasswordInfo.PasswordLen,
                                     Privilege
                                     );

  GuiKeyReset (mKeyContext);
  if (mPointerContext != NULL) {
    GuiPointerReset (mPointerContext);
    GuiPointerSetPosition (mPointerContext, &PtrPosition);
  }

  DrawContext->CursorOpacity = 0xFF;

  SecureZeroMem (mPasswordBox.PasswordInfo.Password, mPasswordBox.PasswordInfo.PasswordLen);

  if (Result) {
    if (Context->PickerContext->PickerAudioAssist) {
      Context->PickerContext->PlayAudioFile (
                                Context->PickerContext,
                                OC_VOICE_OVER_AUDIO_FILE_PASSWORD_ACCEPTED,
                                OC_VOICE_OVER_AUDIO_BASE_TYPE_OPEN_CORE,
                                TRUE
                                );
    }

    mPasswordNumTries = 0;
    return TRUE;
  }

  if (Context->PickerContext->PickerAudioAssist) {
    Context->PickerContext->PlayAudioFile (
                              Context->PickerContext,
                              OC_VOICE_OVER_AUDIO_FILE_PASSWORD_INCORRECT,
                              OC_VOICE_OVER_AUDIO_BASE_TYPE_OPEN_CORE,
                              TRUE
                              );
  }

  ++mPasswordNumTries;
  if (mPasswordNumTries == OC_PASSWORD_MAX_RETRIES) {
    if (Context->PickerContext->PickerAudioAssist) {
      Context->PickerContext->PlayAudioFile (
                                Context->PickerContext,
                                OC_VOICE_OVER_AUDIO_FILE_PASSWORD_RETRY_LIMIT,
                                OC_VOICE_OVER_AUDIO_BASE_TYPE_OPEN_CORE,
                                TRUE
                                );
      DEBUG ((DEBUG_WARN, "OCB: User failed to verify password %d times running\n", OC_PASSWORD_MAX_RETRIES));
    }

    //
    // Hide all UI except the password lock when retries have been exceeded.
    //
    mPasswordBoxContainer.Obj.Opacity = 0;
    InternalRedrawPaswordBox ();

    mCommonActionButtonsContainer.Obj.Opacity = 0;
    GuiRequestDraw (
      (UINT32)mCommonActionButtonsContainer.Obj.OffsetX,
      (UINT32)mCommonActionButtonsContainer.Obj.OffsetY,
      mCommonActionButtonsContainer.Obj.Width,
      mCommonActionButtonsContainer.Obj.Height
      );

    DrawContext->CursorOpacity = 0;
  }

  return FALSE;
}

STATIC
VOID
InternalRequestPasswordConfirmation (
  IN OUT GUI_DRAWING_CONTEXT  *DrawContext
  )
{
  DrawContext->CursorOpacity     = 0;
  mPasswordEnter.Hdr.Obj.Opacity = 0x100 / 2;
  mPasswordBox.RequestConfirm    = TRUE;
  InternalRedrawPaswordBox ();
  GuiRequestDraw (
    (UINT32)(mPasswordBoxContainer.Obj.OffsetX + mPasswordEnter.Hdr.Obj.OffsetX),
    (UINT32)(mPasswordBoxContainer.Obj.OffsetY + mPasswordEnter.Hdr.Obj.OffsetY),
    mPasswordEnter.Hdr.Obj.Width,
    mPasswordEnter.Hdr.Obj.Height
    );
}

VOID
InternalPasswordBoxKeyEvent (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     CONST GUI_KEY_EVENT      *KeyEvent
  )
{
  if (KeyEvent->UnicodeChar == CHAR_CARRIAGE_RETURN) {
    //
    // RETURN finalizes the input.
    //
    InternalRequestPasswordConfirmation (DrawContext);
    return;
  }

  if (KeyEvent->UnicodeChar == CHAR_BACKSPACE) {
    //
    // Delete the last entered character, if such exists.
    //
    if (mPasswordBox.PasswordInfo.PasswordLen > 0) {
      --mPasswordBox.PasswordInfo.PasswordLen;
      mPasswordBox.PasswordInfo.Password[mPasswordBox.PasswordInfo.PasswordLen] = 0;
    }

    if (Context->PickerContext->PickerAudioAssist) {
      Context->PickerContext->PlayAudioFile (
                                Context->PickerContext,
                                APPLE_VOICE_OVER_AUDIO_FILE_BEEP,
                                OC_VOICE_OVER_AUDIO_BASE_TYPE_APPLE,
                                TRUE
                                );
    }
  } else if (  (KeyEvent->UnicodeChar != CHAR_NULL)
            && (KeyEvent->UnicodeChar == (CHAR8)KeyEvent->UnicodeChar)
            && (mPasswordBox.PasswordInfo.PasswordLen < ARRAY_SIZE (mPasswordBox.PasswordInfo.Password)))
  {
    mPasswordBox.PasswordInfo.Password[mPasswordBox.PasswordInfo.PasswordLen] = (CHAR8)KeyEvent->UnicodeChar;
    ++mPasswordBox.PasswordInfo.PasswordLen;
  } else {
    //
    // Only ASCII characters are supported.
    //
    if (Context->PickerContext->PickerAudioAssist) {
      Context->PickerContext->PlayAudioBeep (
                                Context->PickerContext,
                                OC_VOICE_OVER_SIGNALS_ERROR,
                                OC_VOICE_OVER_SIGNAL_ERROR_MS,
                                OC_VOICE_OVER_SILENCE_ERROR_MS
                                );
    }

    return;
  }

  ASSERT (mPasswordBoxContainer.Parent == NULL);
  ASSERT (mPasswordBoxContainer.Obj.OffsetX >= 0);
  ASSERT (mPasswordBoxContainer.Obj.OffsetY >= 0);
  ASSERT (mPasswordBoxContainer.Obj.OffsetX + mPasswordBoxContainer.Obj.Width <= DrawContext->Screen.Width);
  ASSERT (mPasswordBoxContainer.Obj.OffsetX + mPasswordBoxContainer.Obj.Height <= DrawContext->Screen.Height);
  GuiRequestDraw (
    (UINT32)mPasswordBoxContainer.Obj.OffsetX,
    (UINT32)mPasswordBoxContainer.Obj.OffsetY,
    mPasswordBoxContainer.Obj.Width,
    mPasswordBoxContainer.Obj.Height
    );
}

VOID
InternalPasswordBoxFocus (
  IN     CONST GUI_OBJ        *This,
  IN OUT GUI_DRAWING_CONTEXT  *DrawContext,
  IN     BOOLEAN              Focus
  )
{
  if (Focus) {
    mPasswordBoxContainer.Obj.Opacity = 0xFF;

    DrawContext->GuiContext->AudioPlaybackTimeout = 0;
    DrawContext->GuiContext->VoAction             = CanopyVoFocusPassword;
  } else {
    mPasswordBoxContainer.Obj.Opacity = 0x100 / 2;
  }

  InternalRedrawPaswordBox ();
}

VOID
InternalPasswordViewKeyEvent (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     CONST GUI_KEY_EVENT      *KeyEvent
  )
{
  //
  // Disable input when maximum password retries have been reached.
  //
  if (mPasswordNumTries >= OC_PASSWORD_MAX_RETRIES) {
    return;
  }

  if (KeyEvent->OcKeyCode == OC_INPUT_VOICE_OVER) {
    DrawContext->GuiContext->PickerContext->ToggleVoiceOver (
                                              DrawContext->GuiContext->PickerContext,
                                              OC_VOICE_OVER_AUDIO_FILE_ENTER_PASSWORD,
                                              OC_VOICE_OVER_AUDIO_BASE_TYPE_OPEN_CORE
                                              );
    return;
  }

  InternalFocusKeyHandler (
    DrawContext,
    Context,
    KeyEvent
    );
}

GUI_OBJ *
InternalPasswordViewPtrEvent (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     INT64                    BaseX,
  IN     INT64                    BaseY,
  IN     CONST GUI_PTR_EVENT      *Event
  )
{
  //
  // Disable input when maximum password retries have been reached.
  //
  if (mPasswordNumTries >= OC_PASSWORD_MAX_RETRIES) {
    return NULL;
  }

  return InternalCommonViewPtrEvent (
           This,
           DrawContext,
           Context,
           BaseX,
           BaseY,
           Event
           );
}

VOID
InternalPasswordLockDraw (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     INT64                    BaseX,
  IN     INT64                    BaseY,
  IN     UINT32                   OffsetX,
  IN     UINT32                   OffsetY,
  IN     UINT32                   Width,
  IN     UINT32                   Height,
  IN     UINT8                    Opacity
  )
{
  GuiDrawToBuffer (
    &Context->Icons[ICON_LOCK][ICON_TYPE_BASE],
    Opacity,
    DrawContext,
    BaseX,
    BaseY,
    OffsetX,
    OffsetY,
    Width,
    Height
    );
}

VOID
InternalPasswordBoxDraw (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     INT64                    BaseX,
  IN     INT64                    BaseY,
  IN     UINT32                   OffsetX,
  IN     UINT32                   OffsetY,
  IN     UINT32                   Width,
  IN     UINT32                   Height,
  IN     UINT8                    Opacity
  )
{
  CONST GUI_IMAGE  *BoxImage;
  CONST GUI_IMAGE  *DotImage;
  UINT8            DotIndex;

  BoxImage = &Context->Icons[ICON_PASSWORD][ICON_TYPE_BASE];
  DotImage = &Context->Icons[ICON_DOT][ICON_TYPE_BASE];

  GuiDrawToBuffer (
    BoxImage,
    Opacity,
    DrawContext,
    BaseX,
    BaseY,
    OffsetX,
    OffsetY,
    Width,
    Height
    );
  //
  // Selective drawing is unlikely worth it.
  //
  for (
       DotIndex = 0;
       DotIndex < MIN (mPasswordBox.PasswordInfo.PasswordLen, mPasswordBox.MaxPasswordDots);
       ++DotIndex
       )
  {
    GuiDrawChildImage (
      DotImage,
      Opacity,
      DrawContext,
      BaseX,
      BaseY,
      DotIndex * (DotImage->Width + PASSWORD_INTER_DOT_SPACE * DrawContext->Scale) + PASSWORD_FIRST_DOT_SPACE * DrawContext->Scale,
      (BoxImage->Height - DotImage->Height) / 2,
      OffsetX,
      OffsetY,
      Width,
      Height
      );
  }
}

GUI_OBJ *
InternalPasswordEnterPtrEvent (
  IN OUT GUI_OBJ                  *This,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN     INT64                    BaseX,
  IN     INT64                    BaseY,
  IN     CONST GUI_PTR_EVENT      *Event
  )
{
  UINT8  Result;

  Result = InternalCommonSimpleButtonPtrEvent (
             This,
             DrawContext,
             Context,
             BaseX,
             BaseY,
             Event
             );
  switch (Result) {
    case CommonPtrNotHit:
    {
      return NULL;
    }

    case CommonPtrAction:
    {
      InternalRequestPasswordConfirmation (DrawContext);
      //
      // Falthrough to 'hit' case.
      //
    }

    case CommonPtrHit:
    {
      break;
    }
  }

  return This;
}

BOOLEAN
InternalPasswordExitLoop (
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     BOOT_PICKER_GUI_CONTEXT  *Context
  )
{
  BOOLEAN  Confirmed;

  ASSERT (Context != NULL);
  //
  // This is done here to have one more draw loop iteration to flush hiding
  // the UI elements.
  //
  if (mPasswordNumTries >= OC_PASSWORD_MAX_RETRIES) {
    gBS->Stall (SECONDS_TO_MICROSECONDS (5));
    ResetWarm ();
  }

  if (mPasswordBox.RequestConfirm) {
    mPasswordBox.RequestConfirm = FALSE;

    if (!Context->PickerContext->PickerAudioAssist) {
      InternalQueueIncorrectPassword (DrawContext);
    }

    Confirmed = InternalConfirmPassword (DrawContext, Context);
    SecureZeroMem (&mPasswordBox.PasswordInfo, sizeof (mPasswordBox.PasswordInfo));
    return Confirmed;
  }

  return FALSE;
}

STATIC GUI_OBJ_CHILD  *mPasswordViewChildren[] = {
  &mPasswordLock,
  &mPasswordBoxContainer,
  &mCommonActionButtonsContainer
};

STATIC GUI_OBJ_CHILD  *mPasswordViewChildrenMinimal[] = {
  &mPasswordLock,
  &mPasswordBoxContainer
};

STATIC GUI_VIEW_CONTEXT  mPasswordViewContext = {
  InternalCommonViewDraw,
  InternalPasswordViewPtrEvent,
  ARRAY_SIZE (mPasswordViewChildren),
  mPasswordViewChildren,
  InternalPasswordViewKeyEvent,
  InternalGetCursorImage,
  InternalPasswordExitLoop,
  mPasswordFocusList,
  ARRAY_SIZE (mPasswordFocusList)
};

STATIC GUI_VIEW_CONTEXT  mPasswordViewContextMinimal = {
  InternalCommonViewDraw,
  InternalPasswordViewPtrEvent,
  ARRAY_SIZE (mPasswordViewChildrenMinimal),
  mPasswordViewChildrenMinimal,
  InternalPasswordViewKeyEvent,
  InternalGetCursorImage,
  InternalPasswordExitLoop,
  mPasswordFocusListMinimal,
  ARRAY_SIZE (mPasswordFocusListMinimal)
};

GLOBAL_REMOVE_IF_UNREFERENCED GUI_OBJ_CHILD  mPasswordLock = {
  {
    0, 0, 0, 0, 0xFF,
    InternalPasswordLockDraw,
    NULL,
    GuiObjDelegatePtrEvent,
    NULL,
    0,
    NULL
  },
  NULL
};

GLOBAL_REMOVE_IF_UNREFERENCED GUI_PASSWORD_BOX  mPasswordBox = {
  {
    {
      0, 0, 0, 0, 0xFF,
      InternalPasswordBoxDraw,
      NULL,
      GuiObjDelegatePtrEvent,
      NULL,
      0,
      NULL
    },
    &mPasswordBoxContainer.Obj
  },
  {
    { '\0' }, 0
  },
  FALSE,
  0
};

GLOBAL_REMOVE_IF_UNREFERENCED GUI_OBJ_CLICKABLE  mPasswordEnter = {
  {
    {
      0, 0, 0, 0, 0xFF,
      InternalCommonSimpleButtonDraw,
      NULL,
      InternalPasswordEnterPtrEvent,
      NULL,
      0,
      NULL
    },
    &mPasswordBoxContainer.Obj
  },
  0,
  0
};

STATIC GUI_OBJ_CHILD  *mPasswordBoxContainerChildren[] = {
  &mPasswordBox.Hdr,
  &mPasswordEnter.Hdr
};

GLOBAL_REMOVE_IF_UNREFERENCED GUI_OBJ_CHILD  mPasswordBoxContainer = {
  {
    0, 0, 0, 0, 0xFF,
    GuiObjDrawDelegate,
    InternalPasswordBoxKeyEvent,
    GuiObjDelegatePtrEvent,
    InternalPasswordBoxFocus,
    ARRAY_SIZE (mPasswordBoxContainerChildren),
    mPasswordBoxContainerChildren
  },
  NULL
};

BOOLEAN
InternalPasswordAnimateIntro (
  IN     BOOT_PICKER_GUI_CONTEXT  *Context,
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN     UINT64                   CurrentTime
  )
{
  UINT8  Opacity;

  Opacity = (UINT8)GuiGetInterpolatedValue (
                     &mCommonIntroOpacityInterpol,
                     CurrentTime
                     );
  DrawContext->Screen.Opacity = Opacity;

  GuiRequestDraw (
    (UINT32)mPasswordLock.Obj.OffsetX,
    (UINT32)mPasswordLock.Obj.OffsetY,
    mPasswordLock.Obj.Width,
    mPasswordLock.Obj.Height
    );
  GuiRequestDraw (
    (UINT32)mPasswordBoxContainer.Obj.OffsetX,
    (UINT32)mPasswordBoxContainer.Obj.OffsetY,
    mPasswordBoxContainer.Obj.Width,
    mPasswordBoxContainer.Obj.Height
    );
  GuiRequestDraw (
    (UINT32)mCommonActionButtonsContainer.Obj.OffsetX,
    (UINT32)mCommonActionButtonsContainer.Obj.OffsetY,
    mCommonActionButtonsContainer.Obj.Width,
    mCommonActionButtonsContainer.Obj.Height
    );

  return CurrentTime - mCommonIntroOpacityInterpol.StartTime >= mCommonIntroOpacityInterpol.Duration;
}

STATIC GUI_ANIMATION  mPasswordIntroAnimation = {
  INITIALIZE_LIST_HEAD_VARIABLE (mPasswordIntroAnimation.Link),
  NULL,
  InternalPasswordAnimateIntro
};

EFI_STATUS
PasswordViewInitialize (
  OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN  BOOT_PICKER_GUI_CONTEXT  *GuiContext
  )
{
  CONST GUI_IMAGE  *LockImage;
  CONST GUI_IMAGE  *BoxImage;
  CONST GUI_IMAGE  *DotImage;
  CONST GUI_IMAGE  *EnterImage;
  UINT32           EnterOffset;
  UINT32           BoxOffset;
  UINT32           ImageMidOffset;
  UINT32           FirstOffset;
  UINT32           EnterInternalOffset;

  mKeyContext->KeyFilter = OC_PICKER_KEYS_FOR_TYPING;

  CommonViewInitialize (
    DrawContext,
    GuiContext,
    (GuiContext->PickerContext->PickerAttributes & OC_ATTR_USE_MINIMAL_UI) == 0
      ? &mPasswordViewContext
      : &mPasswordViewContextMinimal
    );

  LockImage  = &GuiContext->Icons[ICON_LOCK][ICON_TYPE_BASE];
  BoxImage   = &GuiContext->Icons[ICON_PASSWORD][ICON_TYPE_BASE];
  DotImage   = &GuiContext->Icons[ICON_DOT][ICON_TYPE_BASE];
  EnterImage = &GuiContext->Icons[ICON_ENTER][ICON_TYPE_BASE];

  if (EnterImage->Height > BoxImage->Height) {
    BoxOffset   = (EnterImage->Height - BoxImage->Height) / 2;
    EnterOffset = 0;
  } else {
    BoxOffset   = 0;
    EnterOffset = (BoxImage->Height - EnterImage->Height) / 2;
  }

  mPasswordLock.Obj.Width   = LockImage->Width;
  mPasswordLock.Obj.Height  = LockImage->Height;
  mPasswordLock.Obj.OffsetX = (DrawContext->Screen.Width - mPasswordLock.Obj.Width) / 2;
  mPasswordLock.Obj.OffsetY = (DrawContext->Screen.Height - mPasswordLock.Obj.Height) / 2;

  ImageMidOffset = (EnterImage->Height / 2) * EnterImage->Width;
  for (
       FirstOffset = ImageMidOffset;
       FirstOffset < ImageMidOffset + EnterImage->Width;
       ++FirstOffset
       )
  {
    if (EnterImage->Buffer[FirstOffset].Reserved > 0) {
      break;
    }
  }

  if (PASSWORD_ENTER_INTERNAL_OFFSET * DrawContext->Scale > FirstOffset - ImageMidOffset) {
    EnterInternalOffset = PASSWORD_ENTER_INTERNAL_OFFSET * DrawContext->Scale - (FirstOffset - ImageMidOffset);
  } else {
    EnterInternalOffset = 0;
  }

  mPasswordBox.Hdr.Obj.Width   = BoxImage->Width;
  mPasswordBox.Hdr.Obj.Height  = BoxImage->Height;
  mPasswordBox.Hdr.Obj.OffsetX = 0;
  mPasswordBox.Hdr.Obj.OffsetY = BoxOffset;
  mPasswordBox.MaxPasswordDots = (UINT8)(
                                         (mPasswordBox.Hdr.Obj.Width - EnterInternalOffset - (PASSWORD_FIRST_DOT_SPACE + PASSWORD_LAST_DOT_SPACE - PASSWORD_INTER_DOT_SPACE) * DrawContext->Scale) / (DotImage->Width + PASSWORD_INTER_DOT_SPACE * DrawContext->Scale)
                                         );

  mPasswordEnter.Hdr.Obj.Width   = EnterImage->Width;
  mPasswordEnter.Hdr.Obj.Height  = EnterImage->Height;
  mPasswordEnter.Hdr.Obj.OffsetX = mPasswordBox.Hdr.Obj.Width - PASSWORD_ENTER_INTERNAL_OFFSET * DrawContext->Scale;
  mPasswordEnter.Hdr.Obj.OffsetY = EnterOffset;
  mPasswordEnter.ImageId         = ICON_ENTER;
  mPasswordEnter.ImageState      = ICON_TYPE_BASE;

  mPasswordBoxContainer.Obj.Width   = BoxImage->Width + EnterImage->Width - PASSWORD_ENTER_INTERNAL_OFFSET * DrawContext->Scale;
  mPasswordBoxContainer.Obj.Height  = MAX (BoxImage->Height, EnterImage->Height);
  mPasswordBoxContainer.Obj.OffsetX = (DrawContext->Screen.Width - mPasswordBox.Hdr.Obj.Width) / 2;
  mPasswordBoxContainer.Obj.OffsetY = mPasswordLock.Obj.OffsetY + mPasswordLock.Obj.Height + PASSWORD_BOX_SPACE * DrawContext->Scale - BoxOffset;

  if (!GuiContext->PickerContext->PickerAudioAssist) {
    //
    // Fade-in the entire screen.
    //
    DrawContext->Screen.Opacity = 0;

    InsertHeadList (&DrawContext->Animations, &mPasswordIntroAnimation.Link);
  }

  //
  // Action Buttons fade-in is handled by screen opacity.
  //
  mCommonActionButtonsContainer.Obj.Opacity = 0xFF;

  if (GuiContext->PickerContext->PickerAudioAssist) {
    GuiContext->PickerContext->PlayAudioFile (
                                 GuiContext->PickerContext,
                                 OC_VOICE_OVER_AUDIO_FILE_ENTER_PASSWORD,
                                 OC_VOICE_OVER_AUDIO_BASE_TYPE_OPEN_CORE,
                                 TRUE
                                 );
  }

  return EFI_SUCCESS;
}

VOID
PasswordViewDeinitialize (
  IN OUT GUI_DRAWING_CONTEXT      *DrawContext,
  IN OUT BOOT_PICKER_GUI_CONTEXT  *GuiContext
  )
{
  GuiViewDeinitialize (DrawContext, GuiContext);
}