/** @file
   File explorer lib.

Copyright (c) 2015, 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.             
**/

#ifndef _FILE_EXPLORER_H_
#define _FILE_EXPLORER_H_

#include <PiDxe.h>
#include <Guid/FileSystemVolumeLabelInfo.h>
#include <Guid/FileInfo.h>
#include <Guid/MdeModuleHii.h>

#include <Protocol/HiiConfigAccess.h>
#include <Protocol/DevicePath.h>
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/DevicePathToText.h>
#include <Protocol/LoadFile.h>
#include <Protocol/FormBrowser2.h>

#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseLib.h>
#include <Library/UefiLib.h>
#include <Library/DevicePathLib.h>
#include <Library/FileExplorerLib.h>
#include <Library/HiiLib.h>
#include <Library/PrintLib.h>

#include "FormGuid.h"

#define FILE_EXPLORER_CALLBACK_DATA_SIGNATURE     SIGNATURE_32 ('f', 'e', 'c', 'k')


#pragma pack(1)

///
/// HII specific Vendor Device Path definition.
///
typedef struct {
  VENDOR_DEVICE_PATH             VendorDevicePath;
  EFI_DEVICE_PATH_PROTOCOL       End;
} HII_VENDOR_DEVICE_PATH;

typedef struct {
  EFI_HANDLE                        DeviceHandle;
  EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
  EFI_FILE_HANDLE                   FileHandle;
  UINT16                            *FileName;

  BOOLEAN                           IsRoot;
  BOOLEAN                           IsDir;
} FILE_CONTEXT;

typedef struct {
  UINTN           Signature;
  LIST_ENTRY      Link;
  UINT16          *DisplayString;
  UINT16          *HelpString;
  EFI_STRING_ID   DisplayStringToken;
  EFI_STRING_ID   HelpStringToken;
  VOID            *VariableContext;
} MENU_ENTRY;

typedef struct {
  UINTN           Signature;
  LIST_ENTRY      Head;
  UINTN           MenuNumber;
  BOOLEAN         Used;
} MENU_OPTION;

typedef struct {
  //
  // Shared callback data.
  //
  UINTN                          Signature;

  //
  // File explorer formset callback data.
  //
  EFI_HII_HANDLE                 FeHiiHandle;
  EFI_HANDLE                     FeDriverHandle;
  EFI_HII_CONFIG_ACCESS_PROTOCOL FeConfigAccess;
  EFI_FORM_BROWSER2_PROTOCOL     *FormBrowser2;
  MENU_OPTION                    *FsOptionMenu;
  CHAR16                         *FileType;
  CHOOSE_HANDLER                 ChooseHandler;
  EFI_DEVICE_PATH_PROTOCOL       *RetDevicePath;

} FILE_EXPLORER_CALLBACK_DATA;

#define FILE_EXPLORER_PRIVATE_FROM_THIS(a)  CR (a, FILE_EXPLORER_CALLBACK_DATA, FeConfigAccess, FILE_EXPLORER_CALLBACK_DATA_SIGNATURE)

#pragma pack()

extern UINT8    FileExplorerVfrBin[];

#define MENU_OPTION_SIGNATURE      SIGNATURE_32 ('m', 'e', 'n', 'u')
#define MENU_ENTRY_SIGNATURE       SIGNATURE_32 ('e', 'n', 't', 'r')

///
/// Define the maximum characters that will be accepted.
///
#define MAX_CHAR                480
#define FILE_OPTION_OFFSET      0x8000
#define FILE_OPTION_MASK        0x7FFF


/**
  This function processes the results of changes in configuration.
  When user select a interactive opcode, this callback will be triggered.
  Based on the Question(QuestionId) that triggers the callback, the corresponding
  actions is performed. It handles:

  1) the addition of boot option.
  2) the addition of driver option.
  3) exit from file browser
  4) update of file content if a dir is selected.
  5) boot the file if a file is selected in "boot from file"


  @param This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Action          Specifies the type of action taken by the browser.
  @param QuestionId      A unique value which is sent to the original exporting driver
                         so that it can identify the type of data to expect.
  @param Type            The type of value for the question.
  @param Value           A pointer to the data being sent to the original exporting driver.
  @param ActionRequest   On return, points to the action requested by the callback function.

  @retval  EFI_SUCCESS           The callback successfully handled the action.
  @retval  EFI_OUT_OF_RESOURCES  Not enough storage is available to hold the variable and its data.
  @retval  EFI_DEVICE_ERROR      The variable could not be saved.
  @retval  EFI_UNSUPPORTED       The specified Action is not supported by the callback.

**/
EFI_STATUS
EFIAPI
LibCallback (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  EFI_BROWSER_ACTION                     Action,
  IN  EFI_QUESTION_ID                        QuestionId,
  IN  UINT8                                  Type,
  IN  EFI_IFR_TYPE_VALUE                     *Value,
  OUT EFI_BROWSER_ACTION_REQUEST             *ActionRequest
  );


/**
  This function allows a caller to extract the current configuration for one
  or more named elements from the target driver.


  @param This            - Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Request         - A null-terminated Unicode string in <ConfigRequest> format.
  @param Progress        - On return, points to a character in the Request string.
                         Points to the string's null terminator if request was successful.
                         Points to the most recent '&' before the first failing name/value
                         pair (or the beginning of the string if the failure is in the
                         first name/value pair) if the request was not successful.
  @param Results         - A null-terminated Unicode string in <ConfigAltResp> format which
                         has all values filled in for the names in the Request string.
                         String to be allocated by the called function.

  @retval  EFI_SUCCESS            The Results is filled with the requested values.
  @retval  EFI_OUT_OF_RESOURCES   Not enough memory to store the results.
  @retval  EFI_INVALID_PARAMETER  Request is NULL, illegal syntax, or unknown name.
  @retval  EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.

**/
EFI_STATUS
EFIAPI
LibExtractConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  CONST EFI_STRING                       Request,
  OUT EFI_STRING                             *Progress,
  OUT EFI_STRING                             *Results
  );

/**
  This function processes the results of changes in configuration.


  @param This            - Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Configuration   - A null-terminated Unicode string in <ConfigResp> format.
  @param Progress        - A pointer to a string filled in with the offset of the most
                         recent '&' before the first failing name/value pair (or the
                         beginning of the string if the failure is in the first
                         name/value pair) or the terminating NULL if all was successful.

  @retval  EFI_SUCCESS            The Results is processed successfully.
  @retval  EFI_INVALID_PARAMETER  Configuration is NULL.
  @retval  EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.

**/
EFI_STATUS
EFIAPI
LibRouteConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  CONST EFI_STRING                       Configuration,
  OUT EFI_STRING                             *Progress
  );

/**
  Update the file explower page with the refershed file system.

  @param KeyValue        Key value to identify the type of data to expect.

  @retval  EFI_SUCCESS   Update the file explorer form success.
  @retval  other errors  Error occur when parse one directory.

**/
EFI_STATUS
LibUpdateFileExplorer (
  IN UINT16                       KeyValue
  );
  
  
/**
  Get the device path info saved in the menu structure.

  @param KeyValue        Key value to identify the type of data to expect.

**/
VOID
LibGetDevicePath (
  IN UINT16                       KeyValue
  );

#endif