/** @file
  The application to show the Boot Manager Menu.

Copyright (c) 2011 - 2017, 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 "BootManagerMenu.h"

EFI_HII_HANDLE gStringPackHandle;

BOOLEAN   mModeInitialized = FALSE;

//
// Boot video resolution and text mode.
//
UINT32    mBootHorizontalResolution    = 0;
UINT32    mBootVerticalResolution      = 0;
UINT32    mBootTextModeColumn          = 0;
UINT32    mBootTextModeRow             = 0;
//
// BIOS setup video resolution and text mode.
//
UINT32    mSetupTextModeColumn         = 0;
UINT32    mSetupTextModeRow            = 0;
UINT32    mSetupHorizontalResolution   = 0;
UINT32    mSetupVerticalResolution     = 0;

/**
  Prints a unicode string to the default console, at
  the supplied cursor position, using L"%s" format.

  @param  Column     The cursor position to print the string at.
  @param  Row        The cursor position to print the string at
  @param  String     String pointer.

  @return Length of string printed to the console

**/
UINTN
PrintStringAt (
  IN UINTN     Column,
  IN UINTN     Row,
  IN CHAR16    *String
  )
{

  gST->ConOut->SetCursorPosition (gST->ConOut, Column, Row);
  return Print (L"%s", String);
}

/**
  Prints a character to the default console, at
  the supplied cursor position, using L"%c" format.

  @param  Column     The cursor position to print the string at.
  @param  Row        The cursor position to print the string at.
  @param  Character  Character to print.

  @return Length of string printed to the console.

**/
UINTN
PrintCharAt (
  IN UINTN     Column,
  IN UINTN     Row,
  CHAR16       Character
  )
{
  gST->ConOut->SetCursorPosition (gST->ConOut, Column, Row);
  return Print (L"%c", Character);
}

/**
  Count the storage space of a Unicode string which uses current language to get
  from input string ID.

  @param StringId          The input string to be counted.

  @return Storage space for the input string.

**/
UINTN
GetLineWidth (
  IN EFI_STRING_ID       StringId
  )
{  
  UINTN        Index;
  UINTN        IncrementValue;
  EFI_STRING   String;
  UINTN        LineWidth;
  
  LineWidth = 0;
  String = HiiGetString (gStringPackHandle, StringId, NULL); 
  
  if (String != NULL) {
    Index           = 0;
    IncrementValue  = 1;
    
    do {
      //
      // Advance to the null-terminator or to the first width directive
      //
      for (;
           (String[Index] != NARROW_CHAR) && (String[Index] != WIDE_CHAR) && (String[Index] != 0);
           Index++, LineWidth = LineWidth + IncrementValue
          )
        ;
    
      //
      // We hit the null-terminator, we now have a count
      //
      if (String[Index] == 0) {
        break;
      }
      //
      // We encountered a narrow directive - strip it from the size calculation since it doesn't get printed
      // and also set the flag that determines what we increment by.(if narrow, increment by 1, if wide increment by 2)
      //
      if (String[Index] == NARROW_CHAR) {
        //
        // Skip to the next character
        //
        Index++;
        IncrementValue = 1;
      } else {
        //
        // Skip to the next character
        //
        Index++;
        IncrementValue = 2;
      }
    } while (String[Index] != 0);   
    FreePool (String);
  }
  
  return LineWidth;  
}

/**
  This function uses calculate the boot menu location, size and scroll bar information.

  @param  BootMenuData            The boot menu data to be processed.

  @return EFI_SUCCESS             calculate boot menu information successful.
  @retval EFI_INVALID_PARAMETER   Input parameter is invalid   

**/
EFI_STATUS 
InitializeBootMenuScreen (
  IN OUT  BOOT_MENU_POPUP_DATA  *BootMenuData
  )
{
  UINTN         MaxStrWidth;
  UINTN         StrWidth;
  UINTN         Index;
  UINTN         Column;
  UINTN         Row;
  UINTN         MaxPrintRows;
  UINTN         UnSelectableItmes;

  if (BootMenuData == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  //
  // Get maximum string width
  //
  MaxStrWidth = 0;  
  for (Index = 0; Index < TITLE_TOKEN_COUNT; Index++) {    
    StrWidth = GetLineWidth (BootMenuData->TitleToken[Index]);
    MaxStrWidth = MaxStrWidth > StrWidth ? MaxStrWidth : StrWidth;
  }
   
  for (Index = 0; Index < BootMenuData->ItemCount; Index++) {
    StrWidth = GetLineWidth (BootMenuData->PtrTokens[Index]);
    MaxStrWidth = MaxStrWidth > StrWidth ? MaxStrWidth : StrWidth; 
  } 
  
  for (Index = 0; Index < HELP_TOKEN_COUNT; Index++) {    
    StrWidth = GetLineWidth (BootMenuData->HelpToken[Index]);
    MaxStrWidth = MaxStrWidth > StrWidth ? MaxStrWidth : StrWidth;
  }  
  //
  // query current row and column to calculate boot menu location
  //
  gST->ConOut->QueryMode (
                 gST->ConOut,
                 gST->ConOut->Mode->Mode,
                 &Column,
                 &Row
                 ); 
                 
  MaxPrintRows = Row - 6;    
  UnSelectableItmes = TITLE_TOKEN_COUNT + 2 + HELP_TOKEN_COUNT + 2;           
  BootMenuData->MenuScreen.Width = MaxStrWidth + 8;
  if (BootMenuData->ItemCount + UnSelectableItmes > MaxPrintRows) {
    BootMenuData->MenuScreen.Height = MaxPrintRows;
    BootMenuData->ScrollBarControl.HasScrollBar = TRUE;
    BootMenuData->ScrollBarControl.ItemCountPerScreen = MaxPrintRows - UnSelectableItmes;
    BootMenuData->ScrollBarControl.FirstItem = 0;
    BootMenuData->ScrollBarControl.LastItem = MaxPrintRows - UnSelectableItmes - 1;
  } else {
    BootMenuData->MenuScreen.Height = BootMenuData->ItemCount + UnSelectableItmes;
    BootMenuData->ScrollBarControl.HasScrollBar = FALSE;
    BootMenuData->ScrollBarControl.ItemCountPerScreen = BootMenuData->ItemCount;
    BootMenuData->ScrollBarControl.FirstItem = 0;
    BootMenuData->ScrollBarControl.LastItem = BootMenuData->ItemCount - 1;    
  }
  BootMenuData->MenuScreen.StartCol = (Column -  BootMenuData->MenuScreen.Width) / 2;              
  BootMenuData->MenuScreen.StartRow = (Row -  BootMenuData->MenuScreen.Height) / 2;  

  return EFI_SUCCESS;
}
/**
  This function uses check boot option is wheher setup application or no

  @param   BootOption   Pointer to EFI_BOOT_MANAGER_LOAD_OPTION array.
  
  @retval  TRUE         This boot option is setup application.
  @retval  FALSE        This boot options isn't setup application

**/
BOOLEAN
IsBootManagerMenu (
  IN  EFI_BOOT_MANAGER_LOAD_OPTION    *BootOption
  )
{
  EFI_STATUS                          Status;
  EFI_BOOT_MANAGER_LOAD_OPTION        BootManagerMenu;

  Status = EfiBootManagerGetBootManagerMenu (&BootManagerMenu);
  if (!EFI_ERROR (Status)) {
    EfiBootManagerFreeLoadOption (&BootManagerMenu);
  }

  return (BOOLEAN) (!EFI_ERROR (Status) && (BootOption->OptionNumber == BootManagerMenu.OptionNumber));
}

/**
  Return whether to ignore the boot option.

  @param BootOption  Pointer to EFI_BOOT_MANAGER_LOAD_OPTION to check.

  @retval TRUE  Ignore the boot option.
  @retval FALSE Do not ignore the boot option.
**/
BOOLEAN
IgnoreBootOption (
  IN   EFI_BOOT_MANAGER_LOAD_OPTION  *BootOption
  )
{
  EFI_STATUS                    Status;
  EFI_DEVICE_PATH_PROTOCOL      *ImageDevicePath;

  //
  // Ignore myself.
  //
  Status = gBS->HandleProtocol (gImageHandle, &gEfiLoadedImageDevicePathProtocolGuid, (VOID **) &ImageDevicePath);
  ASSERT_EFI_ERROR (Status);
  if (CompareMem (BootOption->FilePath, ImageDevicePath, GetDevicePathSize (ImageDevicePath)) == 0) {
    return TRUE;
  }

  //
  // Do not ignore Boot Manager Menu.
  //
  if (IsBootManagerMenu (BootOption)) {
    return FALSE;
  }

  //
  // Ignore the hidden/inactive boot option.
  //
  if (((BootOption->Attributes & LOAD_OPTION_HIDDEN) != 0) || ((BootOption->Attributes & LOAD_OPTION_ACTIVE) == 0)) {
    return TRUE;
  }

  return FALSE;
}

/**
  This function uses to initialize boot menu data

  @param   BootOption             Pointer to EFI_BOOT_MANAGER_LOAD_OPTION array.
  @param   BootOptionCount        Number of boot option.
  @param   BootMenuData           The Input BootMenuData to be initialized.
  
  @retval  EFI_SUCCESS            Initialize boot menu data successful.
  @retval  EFI_INVALID_PARAMETER  Input parameter is invalid.   

**/
EFI_STATUS
InitializeBootMenuData (
  IN   EFI_BOOT_MANAGER_LOAD_OPTION  *BootOption,
  IN   UINTN                         BootOptionCount,
  OUT  BOOT_MENU_POPUP_DATA          *BootMenuData
  )
{
  UINTN                         Index;
  UINTN                         StrIndex;
      
  if (BootOption == NULL || BootMenuData == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  BootMenuData->TitleToken[0] = STRING_TOKEN (STR_BOOT_POPUP_MENU_TITLE_STRING);
  BootMenuData->PtrTokens     = AllocateZeroPool (BootOptionCount * sizeof (EFI_STRING_ID));
  ASSERT (BootMenuData->PtrTokens != NULL);

  //
  // Skip boot option which created by BootNext Variable
  //
  for (StrIndex = 0, Index = 0; Index < BootOptionCount; Index++) {
    if (IgnoreBootOption (&BootOption[Index])) {
      continue;
    }

    ASSERT (BootOption[Index].Description != NULL);
    BootMenuData->PtrTokens[StrIndex++] = HiiSetString (
                                            gStringPackHandle, 
                                            0,
                                            BootOption[Index].Description,
                                            NULL
                                            );
  }

  BootMenuData->ItemCount           = StrIndex;   
  BootMenuData->HelpToken[0] = STRING_TOKEN (STR_BOOT_POPUP_MENU_HELP1_STRING);
  BootMenuData->HelpToken[1] = STRING_TOKEN (STR_BOOT_POPUP_MENU_HELP2_STRING);
  BootMenuData->HelpToken[2] = STRING_TOKEN (STR_BOOT_POPUP_MENU_HELP3_STRING);
  InitializeBootMenuScreen (BootMenuData);
  BootMenuData->SelectItem = 0;
  return EFI_SUCCESS;
}    

/**
  This function uses input select item to highlight selected item
  and set current selected item in BootMenuData

  @param  WantSelectItem          The user wants to select item.
  @param  BootMenuData            The boot menu data to be processed

  @return EFI_SUCCESS             Highlight selected item and update current selected 
                                  item successful 
  @retval EFI_INVALID_PARAMETER   Input parameter is invalid   
**/
EFI_STATUS
BootMenuSelectItem (
  IN     UINTN                 WantSelectItem,
  IN OUT BOOT_MENU_POPUP_DATA  *BootMenuData
  )
{
  INT32                 SavedAttribute;
  EFI_STRING            String;
  UINTN                 StartCol;  
  UINTN                 StartRow;
  UINTN                 PrintCol;
  UINTN                 PrintRow;
  UINTN                 TopShadeNum;
  UINTN                 LowShadeNum;
  UINTN                 FirstItem;
  UINTN                 LastItem;
  UINTN                 ItemCountPerScreen;
  UINTN                 Index;
  BOOLEAN               RePaintItems;
  
  if (BootMenuData == NULL || WantSelectItem >= BootMenuData->ItemCount) {
    return EFI_INVALID_PARAMETER;
  }
  ASSERT (BootMenuData->ItemCount != 0);
  SavedAttribute = gST->ConOut->Mode->Attribute;
  RePaintItems = FALSE;
  StartCol = BootMenuData->MenuScreen.StartCol;
  StartRow = BootMenuData->MenuScreen.StartRow;
  //
  // print selectable items again and adjust scroll bar if need
  //         
  if (BootMenuData->ScrollBarControl.HasScrollBar &&
      (WantSelectItem < BootMenuData->ScrollBarControl.FirstItem ||
      WantSelectItem > BootMenuData->ScrollBarControl.LastItem ||
      WantSelectItem == BootMenuData->SelectItem)) {          
    ItemCountPerScreen   = BootMenuData->ScrollBarControl.ItemCountPerScreen;
    //
    // Set first item and last item
    //     
    if (WantSelectItem < BootMenuData->ScrollBarControl.FirstItem) {
      BootMenuData->ScrollBarControl.FirstItem = WantSelectItem;
      BootMenuData->ScrollBarControl.LastItem = WantSelectItem + ItemCountPerScreen - 1;  
    } else if (WantSelectItem > BootMenuData->ScrollBarControl.LastItem) {
      BootMenuData->ScrollBarControl.FirstItem = WantSelectItem - ItemCountPerScreen + 1; 
      BootMenuData->ScrollBarControl.LastItem = WantSelectItem;
    }
    gST->ConOut->SetAttribute (gST->ConOut, EFI_WHITE | EFI_BACKGROUND_BLUE);
    FirstItem = BootMenuData->ScrollBarControl.FirstItem;
    LastItem  = BootMenuData->ScrollBarControl.LastItem;
    TopShadeNum = 0;
    if (FirstItem != 0) {
      TopShadeNum = (FirstItem * ItemCountPerScreen) / BootMenuData->ItemCount;
      if ((FirstItem * ItemCountPerScreen) % BootMenuData->ItemCount != 0) {
        TopShadeNum++;
      }
      PrintCol = StartCol  + BootMenuData->MenuScreen.Width - 2;
      PrintRow = StartRow + TITLE_TOKEN_COUNT + 2;  
      for (Index = 0; Index < TopShadeNum; Index++, PrintRow++) {
        PrintCharAt (PrintCol, PrintRow, BLOCKELEMENT_LIGHT_SHADE);
      }
    }
    LowShadeNum = 0;
    if (LastItem != BootMenuData->ItemCount - 1) {
      LowShadeNum = ((BootMenuData->ItemCount - 1 - LastItem) * ItemCountPerScreen) / BootMenuData->ItemCount;
      if (((BootMenuData->ItemCount - 1 - LastItem) * ItemCountPerScreen) % BootMenuData->ItemCount != 0) {
        LowShadeNum++;
      }
      PrintCol = StartCol  + BootMenuData->MenuScreen.Width - 2;
      PrintRow = StartRow + TITLE_TOKEN_COUNT + 2 + ItemCountPerScreen - LowShadeNum;  
      for (Index = 0; Index < LowShadeNum; Index++, PrintRow++) {
        PrintCharAt (PrintCol, PrintRow, BLOCKELEMENT_LIGHT_SHADE);
      } 
    }
    PrintCol = StartCol  + BootMenuData->MenuScreen.Width - 2;
    PrintRow = StartRow + TITLE_TOKEN_COUNT + 2 + TopShadeNum;  
    for (Index = TopShadeNum; Index < ItemCountPerScreen - LowShadeNum; Index++, PrintRow++) {
      PrintCharAt (PrintCol, PrintRow, BLOCKELEMENT_FULL_BLOCK);
    }      


    //
    // Clear selectable items first
    //
    PrintCol = StartCol  + 1;
    PrintRow = StartRow + TITLE_TOKEN_COUNT + 2;  
    String = AllocateZeroPool ((BootMenuData->MenuScreen.Width - 2) * sizeof (CHAR16));
    ASSERT (String != NULL);
    for (Index = 0; Index < BootMenuData->MenuScreen.Width - 3; Index++) {
      String[Index] = 0x20;
    }      
    for (Index = 0; Index < ItemCountPerScreen; Index++) {        
      PrintStringAt (PrintCol, PrintRow + Index, String); 
    }
    FreePool (String);
    //
    // print selectable items  
    //
    for (Index = 0; Index < ItemCountPerScreen; Index++, PrintRow++) {
      String = HiiGetString (gStringPackHandle, BootMenuData->PtrTokens[Index + FirstItem], NULL);
      PrintStringAt (PrintCol, PrintRow, String);
      FreePool (String); 
    }
    RePaintItems = TRUE;
  }
  
  //
  // Print want to select item 
  //
  FirstItem = BootMenuData->ScrollBarControl.FirstItem;
  gST->ConOut->SetAttribute (gST->ConOut, EFI_WHITE | EFI_BACKGROUND_BLACK);
  String = HiiGetString (gStringPackHandle, BootMenuData->PtrTokens[WantSelectItem], NULL);
  PrintCol = StartCol  + 1;  
  PrintRow = StartRow + TITLE_TOKEN_COUNT + 2 + WantSelectItem - FirstItem;  
  PrintStringAt (PrintCol, PrintRow, String);
  FreePool (String);
  
  //
  // if Want Select and selected item isn't the same and doesn't re-draw selectable 
  // items, clear select item
  //
  if (WantSelectItem != BootMenuData->SelectItem && !RePaintItems) {
    gST->ConOut->SetAttribute (gST->ConOut, EFI_WHITE | EFI_BACKGROUND_BLUE);
    String = HiiGetString (gStringPackHandle, BootMenuData->PtrTokens[BootMenuData->SelectItem], NULL);
    PrintCol = StartCol  + 1;  
    PrintRow = StartRow + 3 + BootMenuData->SelectItem - FirstItem;  
    PrintStringAt (PrintCol, PrintRow, String);
    FreePool (String);    
  }

  gST->ConOut->SetAttribute (gST->ConOut, SavedAttribute);
  BootMenuData->SelectItem = WantSelectItem;
  return EFI_SUCCESS;
}

/**
  This function uses to draw boot popup menu

  @param   BootMenuData           The Input BootMenuData to be processed.
  
  @retval  EFI_SUCCESS            Draw boot popup menu successful.

**/
EFI_STATUS 
DrawBootPopupMenu (
  IN  BOOT_MENU_POPUP_DATA  *BootMenuData
  )
{
  EFI_STRING            String;
  UINTN                 Index;
  UINTN                 Width;  
  UINTN                 StartCol;
  UINTN                 StartRow;
  UINTN                 PrintRow;
  UINTN                 PrintCol;
  UINTN                 LineWidth;
  INT32                 SavedAttribute; 
  UINTN                 ItemCountPerScreen;  

  gST->ConOut->ClearScreen (gST->ConOut);
  
  SavedAttribute = gST->ConOut->Mode->Attribute;
  gST->ConOut->SetAttribute (gST->ConOut, EFI_WHITE | EFI_BACKGROUND_BLUE);
  Width    = BootMenuData->MenuScreen.Width;
  StartCol = BootMenuData->MenuScreen.StartCol;
  StartRow = BootMenuData->MenuScreen.StartRow;
  ItemCountPerScreen = BootMenuData->ScrollBarControl.ItemCountPerScreen;
  PrintRow = StartRow;
 
  gST->ConOut->EnableCursor (gST->ConOut, FALSE);
  //
  // Draw Boot popup menu screen
  //
  PrintCharAt (StartCol, PrintRow, BOXDRAW_DOWN_RIGHT);
  for (Index = 1; Index < Width - 1; Index++) {
    PrintCharAt (StartCol + Index, PrintRow, BOXDRAW_HORIZONTAL); 
  }
  PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_DOWN_LEFT);
  
  //
  // Draw the screen for title
  //
  String = AllocateZeroPool ((Width - 1) * sizeof (CHAR16));
  ASSERT (String != NULL);
  for (Index = 0; Index < Width - 2; Index++) {
    String[Index] = 0x20;
  }

  for (Index = 0; Index < TITLE_TOKEN_COUNT; Index++) {
    PrintRow++;
    PrintCharAt (StartCol, PrintRow, BOXDRAW_VERTICAL);  
    PrintStringAt (StartCol + 1, PrintRow, String);
    PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_VERTICAL);
  }
  
  PrintRow++;
  PrintCharAt (StartCol, PrintRow, BOXDRAW_VERTICAL_RIGHT);
  for (Index = 1; Index < Width - 1; Index++) {
    PrintCharAt (StartCol + Index, PrintRow, BOXDRAW_HORIZONTAL); 
  }
  PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_VERTICAL_LEFT);  
  
  //
  // Draw screen for selectable items
  //
  for (Index = 0; Index < ItemCountPerScreen; Index++) {
    PrintRow++;
    PrintCharAt (StartCol, PrintRow, BOXDRAW_VERTICAL);
    PrintStringAt (StartCol + 1, PrintRow, String);
    PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_VERTICAL);
  }  

  PrintRow++;
  PrintCharAt (StartCol, PrintRow, BOXDRAW_VERTICAL_RIGHT);
  for (Index = 1; Index < Width - 1; Index++) {
    PrintCharAt (StartCol + Index, PrintRow, BOXDRAW_HORIZONTAL); 
  }
  PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_VERTICAL_LEFT);
  
  //
  // Draw screen for Help
  //
  for (Index = 0; Index < HELP_TOKEN_COUNT; Index++) {
    PrintRow++;
    PrintCharAt (StartCol, PrintRow, BOXDRAW_VERTICAL);
    PrintStringAt (StartCol + 1, PrintRow, String);
    PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_VERTICAL);
  }
  FreePool (String);  
    
  PrintRow++;  
  PrintCharAt (StartCol, PrintRow, BOXDRAW_UP_RIGHT);
  for (Index = 1; Index < Width - 1; Index++) {
    PrintCharAt (StartCol + Index, PrintRow, BOXDRAW_HORIZONTAL); 
  }
  PrintCharAt (StartCol + Width - 1, PrintRow, BOXDRAW_UP_LEFT);        
  
  
  //
  // print title strings
  //
  PrintRow = StartRow + 1;
  for (Index = 0; Index < TITLE_TOKEN_COUNT; Index++, PrintRow++) {
    String = HiiGetString (gStringPackHandle, BootMenuData->TitleToken[Index], NULL);
    LineWidth = GetLineWidth (BootMenuData->TitleToken[Index]);      
    PrintCol = StartCol + (Width - LineWidth) / 2;
    PrintStringAt (PrintCol, PrintRow, String);
    FreePool (String);
  }
  
  //
  // print selectable items
  //
  PrintCol = StartCol + 1;
  PrintRow = StartRow + TITLE_TOKEN_COUNT + 2;  
  for (Index = 0; Index < ItemCountPerScreen; Index++, PrintRow++) {
    String = HiiGetString (gStringPackHandle, BootMenuData->PtrTokens[Index], NULL);
    PrintStringAt (PrintCol, PrintRow, String);
    FreePool (String); 
  }
  
  //
  // Print Help strings
  //
  PrintRow++;
  for (Index = 0; Index < HELP_TOKEN_COUNT; Index++, PrintRow++) {
    String = HiiGetString (gStringPackHandle, BootMenuData->HelpToken[Index], NULL);
    LineWidth = GetLineWidth (BootMenuData->HelpToken[Index]);
    PrintCol = StartCol + (Width - LineWidth) / 2;
    PrintStringAt (PrintCol, PrintRow, String);
    FreePool (String);
  }
  
  //
  // Print scroll bar if has scroll bar
  //
  if (BootMenuData->ScrollBarControl.HasScrollBar) {
    PrintCol = StartCol + Width - 2;
    PrintRow = StartRow + 2; 
    PrintCharAt (PrintCol, PrintRow, GEOMETRICSHAPE_UP_TRIANGLE); 
    PrintCharAt (PrintCol + 1, PrintRow, BOXDRAW_VERTICAL); 
    PrintRow += (ItemCountPerScreen + 1);    
    PrintCharAt (PrintCol, PrintRow, GEOMETRICSHAPE_DOWN_TRIANGLE);
    PrintCharAt (PrintCol + 1, PrintRow, BOXDRAW_VERTICAL); 
  }  
    
  gST->ConOut->SetAttribute (gST->ConOut, SavedAttribute);
  //
  // Print Selected item
  //
  BootMenuSelectItem (BootMenuData->SelectItem, BootMenuData);
  return EFI_SUCCESS;
}

/**
  This function uses to boot from selected item 

  @param   BootOptions            Pointer to EFI_BOOT_MANAGER_LOAD_OPTION array.
  @param   BootOptionCount        Number of boot option.
  @param   SelectItem             Current selected item.
**/
VOID
BootFromSelectOption (
  IN   EFI_BOOT_MANAGER_LOAD_OPTION  *BootOptions,
  IN   UINTN                         BootOptionCount, 
  IN   UINTN                         SelectItem
  )
{
  UINTN                 ItemNum;
  UINTN                 Index;

  ASSERT (BootOptions != NULL);

  for (ItemNum = 0, Index = 0; Index < BootOptionCount; Index++) {
    if (IgnoreBootOption (&BootOptions[Index])) {
      continue;
    }

    if (ItemNum++ == SelectItem) {
      EfiBootManagerBoot (&BootOptions[Index]);
      break;
    }
  }
}

/**
  This function will change video resolution and text mode
  according to defined setup mode or defined boot mode  

  @param  IsSetupMode   Indicate mode is changed to setup mode or boot mode. 

  @retval  EFI_SUCCESS  Mode is changed successfully.
  @retval  Others             Mode failed to be changed.

**/
EFI_STATUS
EFIAPI
BdsSetConsoleMode (
  BOOLEAN  IsSetupMode
  )
{
  EFI_GRAPHICS_OUTPUT_PROTOCOL          *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL       *SimpleTextOut;
  UINTN                                 SizeOfInfo;
  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *Info;
  UINT32                                MaxGopMode;
  UINT32                                MaxTextMode;
  UINT32                                ModeNumber;
  UINT32                                NewHorizontalResolution;
  UINT32                                NewVerticalResolution;
  UINT32                                NewColumns;
  UINT32                                NewRows;
  UINTN                                 HandleCount;
  EFI_HANDLE                            *HandleBuffer;
  EFI_STATUS                            Status;
  UINTN                                 Index;
  UINTN                                 CurrentColumn;
  UINTN                                 CurrentRow;  

  MaxGopMode  = 0;
  MaxTextMode = 0;

  //
  // Get current video resolution and text mode 
  //
  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiGraphicsOutputProtocolGuid,
                  (VOID**)&GraphicsOutput
                  );
  if (EFI_ERROR (Status)) {
    GraphicsOutput = NULL;
  }

  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiSimpleTextOutProtocolGuid,
                  (VOID**)&SimpleTextOut
                  );
  if (EFI_ERROR (Status)) {
    SimpleTextOut = NULL;
  }  

  if ((GraphicsOutput == NULL) || (SimpleTextOut == NULL)) {
    return EFI_UNSUPPORTED;
  }

  if (IsSetupMode) {
    //
    // The required resolution and text mode is setup mode.
    //
    NewHorizontalResolution = mSetupHorizontalResolution;
    NewVerticalResolution   = mSetupVerticalResolution;
    NewColumns              = mSetupTextModeColumn;
    NewRows                 = mSetupTextModeRow;
  } else {
    //
    // The required resolution and text mode is boot mode.
    //
    NewHorizontalResolution = mBootHorizontalResolution;
    NewVerticalResolution   = mBootVerticalResolution;
    NewColumns              = mBootTextModeColumn;
    NewRows                 = mBootTextModeRow;   
  }
  
  if (GraphicsOutput != NULL) {
    MaxGopMode  = GraphicsOutput->Mode->MaxMode;
  } 

  if (SimpleTextOut != NULL) {
    MaxTextMode = SimpleTextOut->Mode->MaxMode;
  }

  //
  // 1. If current video resolution is same with required video resolution,
  //    video resolution need not be changed.
  //    1.1. If current text mode is same with required text mode, text mode need not be changed.
  //    1.2. If current text mode is different from required text mode, text mode need be changed.
  // 2. If current video resolution is different from required video resolution, we need restart whole console drivers.
  //
  for (ModeNumber = 0; ModeNumber < MaxGopMode; ModeNumber++) {
    Status = GraphicsOutput->QueryMode (
                       GraphicsOutput,
                       ModeNumber,
                       &SizeOfInfo,
                       &Info
                       );
    if (!EFI_ERROR (Status)) {
      if ((Info->HorizontalResolution == NewHorizontalResolution) &&
          (Info->VerticalResolution == NewVerticalResolution)) {
        if ((GraphicsOutput->Mode->Info->HorizontalResolution == NewHorizontalResolution) &&
            (GraphicsOutput->Mode->Info->VerticalResolution == NewVerticalResolution)) {
          //
          // Current resolution is same with required resolution, check if text mode need be set
          //
          Status = SimpleTextOut->QueryMode (SimpleTextOut, SimpleTextOut->Mode->Mode, &CurrentColumn, &CurrentRow);
          ASSERT_EFI_ERROR (Status);
          if (CurrentColumn == NewColumns && CurrentRow == NewRows) {
            //
            // If current text mode is same with required text mode. Do nothing
            //
            FreePool (Info);
            return EFI_SUCCESS;
          } else {
            //
            // If current text mode is different from required text mode.  Set new video mode
            //
            for (Index = 0; Index < MaxTextMode; Index++) {
              Status = SimpleTextOut->QueryMode (SimpleTextOut, Index, &CurrentColumn, &CurrentRow);
              if (!EFI_ERROR(Status)) {
                if ((CurrentColumn == NewColumns) && (CurrentRow == NewRows)) {
                  //
                  // Required text mode is supported, set it.
                  //
                  Status = SimpleTextOut->SetMode (SimpleTextOut, Index);
                  ASSERT_EFI_ERROR (Status);
                  //
                  // Update text mode PCD.
                  //
                  Status = PcdSet32S (PcdConOutColumn, mSetupTextModeColumn);
                  ASSERT_EFI_ERROR (Status);
                  Status = PcdSet32S (PcdConOutRow, mSetupTextModeRow);
                  ASSERT_EFI_ERROR (Status);
                  FreePool (Info);
                  return EFI_SUCCESS;
                }
              }
            }
            if (Index == MaxTextMode) {
              //
              // If required text mode is not supported, return error.
              //
              FreePool (Info);
              return EFI_UNSUPPORTED;
            }
          }
        } else {
          //
          // If current video resolution is not same with the new one, set new video resolution.
          // In this case, the driver which produces simple text out need be restarted.
          //
          Status = GraphicsOutput->SetMode (GraphicsOutput, ModeNumber);
          if (!EFI_ERROR (Status)) {
            FreePool (Info);
            break;
          }
        }
      }
      FreePool (Info);
    }
  }

  if (ModeNumber == MaxGopMode) {
    //
    // If the resolution is not supported, return error.
    //
    return EFI_UNSUPPORTED;
  }

  //
  // Set PCD to Inform GraphicsConsole to change video resolution.
  // Set PCD to Inform Consplitter to change text mode.
  //
  Status = PcdSet32S (PcdVideoHorizontalResolution, NewHorizontalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdVideoVerticalResolution, NewVerticalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutColumn, NewColumns);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutRow, NewRows);
  ASSERT_EFI_ERROR (Status);
  
  //
  // Video mode is changed, so restart graphics console driver and higher level driver.
  // Reconnect graphics console driver and higher level driver.
  // Locate all the handles with GOP protocol and reconnect it.
  //
  Status = gBS->LocateHandleBuffer (
                   ByProtocol,
                   &gEfiSimpleTextOutProtocolGuid,
                   NULL,
                   &HandleCount,
                   &HandleBuffer
                   );
  if (!EFI_ERROR (Status)) {
    for (Index = 0; Index < HandleCount; Index++) {
      gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
    }
    for (Index = 0; Index < HandleCount; Index++) {
      gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
    }
    if (HandleBuffer != NULL) {
      FreePool (HandleBuffer);
    }
  }

  return EFI_SUCCESS;
}

/**
  Display the boot popup menu and allow user select boot item.

  @param   ImageHandle     The image handle.
  @param   SystemTable     The system table.
  
  @retval  EFI_SUCCESS          Boot from selected boot option, and return success from boot option
  @retval  EFI_NOT_FOUND        User select to enter setup or can not find boot option
  
**/
EFI_STATUS
EFIAPI
BootManagerMenuEntry (
  IN EFI_HANDLE                            ImageHandle,
  IN EFI_SYSTEM_TABLE                      *SystemTable
  )
{
  EFI_BOOT_MANAGER_LOAD_OPTION    *BootOption;
  UINTN                           BootOptionCount;  
  EFI_STATUS                      Status;
  BOOT_MENU_POPUP_DATA            BootMenuData;
  UINTN                           Index;
  EFI_INPUT_KEY                   Key;
  BOOLEAN                         ExitApplication;
  UINTN                           SelectItem;
  EFI_BOOT_LOGO_PROTOCOL          *BootLogo;
  EFI_GRAPHICS_OUTPUT_PROTOCOL    *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *SimpleTextOut;
  UINTN                           BootTextColumn;
  UINTN                           BootTextRow;

  //
  // Set Logo status invalid when boot manager menu is launched
  //
  BootLogo = NULL;
  Status = gBS->LocateProtocol (&gEfiBootLogoProtocolGuid, NULL, (VOID **) &BootLogo);
  if (!EFI_ERROR (Status) && (BootLogo != NULL)) {
    Status = BootLogo->SetBootLogo (BootLogo, NULL, 0, 0, 0, 0);
    ASSERT_EFI_ERROR (Status);
  }

  gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);

  gStringPackHandle = HiiAddPackages (
                         &gEfiCallerIdGuid,
                         gImageHandle,
                         BootManagerMenuAppStrings,
                         NULL
                         );
  ASSERT (gStringPackHandle != NULL);

  //
  // Connect all prior to entering the platform setup menu.
  //
  EfiBootManagerConnectAll ();
  EfiBootManagerRefreshAllBootOption ();

  BootOption = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);

  if (!mModeInitialized) {
    //
    // After the console is ready, get current video resolution 
    // and text mode before launching setup at first time.
    //
    Status = gBS->HandleProtocol (
                    gST->ConsoleOutHandle,
                    &gEfiGraphicsOutputProtocolGuid,
                    (VOID**)&GraphicsOutput
                    );
    if (EFI_ERROR (Status)) {
      GraphicsOutput = NULL;
    }
    
    Status = gBS->HandleProtocol (
                    gST->ConsoleOutHandle,
                    &gEfiSimpleTextOutProtocolGuid,
                    (VOID**)&SimpleTextOut
                    );
    if (EFI_ERROR (Status)) {
      SimpleTextOut = NULL;
    }  

    if (GraphicsOutput != NULL) {
      //
      // Get current video resolution and text mode.
      //
      mBootHorizontalResolution = GraphicsOutput->Mode->Info->HorizontalResolution;
      mBootVerticalResolution   = GraphicsOutput->Mode->Info->VerticalResolution;
    }

    if (SimpleTextOut != NULL) {
      Status = SimpleTextOut->QueryMode (
                                SimpleTextOut,
                                SimpleTextOut->Mode->Mode,
                                &BootTextColumn,
                                &BootTextRow
                                );
      mBootTextModeColumn = (UINT32)BootTextColumn;
      mBootTextModeRow    = (UINT32)BootTextRow;
    }

    //
    // Get user defined text mode for setup.
    //  
    mSetupHorizontalResolution = PcdGet32 (PcdSetupVideoHorizontalResolution);
    mSetupVerticalResolution   = PcdGet32 (PcdSetupVideoVerticalResolution);      
    mSetupTextModeColumn       = PcdGet32 (PcdSetupConOutColumn);
    mSetupTextModeRow          = PcdGet32 (PcdSetupConOutRow);
    mModeInitialized           = TRUE;
  }
  
  //
  // Set back to conventional setup resolution
  //
  BdsSetConsoleMode (TRUE);

  //
  // Initialize Boot menu data
  //
  Status = InitializeBootMenuData (BootOption, BootOptionCount, &BootMenuData);
  //
  // According to boot menu data to draw boot popup menu
  //
  DrawBootPopupMenu (&BootMenuData);
  
  //
  // check user input to determine want to re-draw or boot from user selected item
  //
  ExitApplication = FALSE;
  while (!ExitApplication) {
    gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &Index);
    Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
    if (!EFI_ERROR (Status)) {
      switch (Key.UnicodeChar) {
      
      case CHAR_NULL:        
        switch (Key.ScanCode) {          
          
        case SCAN_UP:
          SelectItem = BootMenuData.SelectItem == 0 ? BootMenuData.ItemCount - 1 : BootMenuData.SelectItem - 1;
          BootMenuSelectItem (SelectItem, &BootMenuData); 
          break;
        
        case SCAN_DOWN:
          SelectItem = BootMenuData.SelectItem == BootMenuData.ItemCount - 1 ? 0 : BootMenuData.SelectItem + 1;
          BootMenuSelectItem (SelectItem, &BootMenuData); 
          break;

        case SCAN_ESC:
          gST->ConOut->ClearScreen (gST->ConOut);
          ExitApplication = TRUE;
          //
          // Set boot resolution for normal boot
          //
          BdsSetConsoleMode (FALSE);
          break;
          
        default:
          break;
        }
        break;
        
      case CHAR_CARRIAGE_RETURN:
        gST->ConOut->ClearScreen (gST->ConOut);
        //
        // Set boot resolution for normal boot
        //
        BdsSetConsoleMode (FALSE);
        BootFromSelectOption (BootOption, BootOptionCount, BootMenuData.SelectItem);
        //
        // Back to boot manager menu again, set back to setup resolution
        //
        BdsSetConsoleMode (TRUE);
        DrawBootPopupMenu (&BootMenuData);
        break;
        
      default:
        break;
      }
    }
  }
  EfiBootManagerFreeLoadOptions (BootOption, BootOptionCount);
  FreePool (BootMenuData.PtrTokens);

  HiiRemovePackages (gStringPackHandle);

  return Status;
  
}
