conio.h

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/*
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         ReactOS Console Server DLL
 * FILE:            win32ss/user/winsrv/consrv/include/conio.h
 * PURPOSE:         Public Console I/O Interface
 * PROGRAMMERS:     Gé van Geldorp
 *                  Jeffrey Morlan
 *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
 */

#pragma once

#include "rect.h"

/* Default attributes */
#define DEFAULT_SCREEN_ATTRIB   (FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED)
#define DEFAULT_POPUP_ATTRIB    (FOREGROUND_BLUE | FOREGROUND_RED   | \
                                 BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_INTENSITY)


/* Object type magic numbers */
typedef enum _CONSOLE_IO_OBJECT_TYPE
{
    UNKNOWN         = 0x00, // --> Unknown object
    TEXTMODE_BUFFER = 0x01, // --> Output-type object for text SBs
    GRAPHICS_BUFFER = 0x02, // --> Output-type object for graphics SBs
    SCREEN_BUFFER   = 0x03, // --> Any SB type
    INPUT_BUFFER    = 0x04, // --> Input-type object
    ANY_TYPE_BUFFER = 0x07, // --> Any IO object
} CONSOLE_IO_OBJECT_TYPE;

typedef struct _CONSOLE_IO_OBJECT
{
    CONSOLE_IO_OBJECT_TYPE Type;

    struct _CONSOLE* /* PCONSOLE */ Console;
    LONG ReferenceCount;    /* Is incremented each time a console object gets referenced */

    LONG AccessRead, AccessWrite;
    LONG ExclusiveRead, ExclusiveWrite;
} CONSOLE_IO_OBJECT, *PCONSOLE_IO_OBJECT;


/******************************************************************************\
|*                                                                            *|
|*     Abstract "class" for screen-buffers, be they text-mode or graphics     *|
|*                                                                            *|
\******************************************************************************/

/*
 * See conoutput.c for the implementation
 */

#define GetType(This)   (((PCONSOLE_SCREEN_BUFFER)(This))->Header.Type)

typedef struct _CONSOLE_SCREEN_BUFFER
{
    CONSOLE_IO_OBJECT Header;           /* Object header - MUST BE IN FIRST PLACE */

    LIST_ENTRY ListEntry;               /* Entry in console's list of buffers */

    COORD   ScreenBufferSize;           /* Size of this screen buffer. (Rows, Columns) for text-mode and (Width, Height) for graphics-mode */
    COORD   ViewSize;                   /* Associated "view" (i.e. console) size */

    COORD   OldScreenBufferSize;        /* Old size of this screen buffer */
    COORD   OldViewSize;                /* Old associated view size */

    COORD   ViewOrigin;                 /* Beginning offset for the actual display area */

/***** Put that VV in TEXTMODE_SCREEN_BUFFER ?? *****/
    COORD   CursorPosition;             /* Current cursor position */
    BOOLEAN CursorBlinkOn;
    BOOLEAN ForceCursorOff;
//  ULONG   CursorSize;
    CONSOLE_CURSOR_INFO CursorInfo; // FIXME: Keep this member or not ??
/*********************************************/

    HPALETTE PaletteHandle;             /* Handle to the color palette associated to this buffer */
    UINT     PaletteUsage;              /* The new use of the system palette. See SetSystemPaletteUse 'uUsage' parameter */

//  USHORT   ScreenDefaultAttrib;       /* Default screen char attribute */
//  USHORT   PopupDefaultAttrib;        /* Default popup char attribute */
    USHORT Mode;                        /* Output buffer modes */
} CONSOLE_SCREEN_BUFFER, *PCONSOLE_SCREEN_BUFFER;



/******************************************************************************\
|*                                                                            *|
|*           Text-mode and graphics-mode screen-buffer "classes"              *|
|*                                                                            *|
\******************************************************************************/

/*
 * See text.c for the implementation
 */

/************************************************************************
 * Screen buffer structure represents the win32 screen buffer object.   *
 * Internally, the portion of the buffer being shown CAN loop past the  *
 * bottom of the virtual buffer and wrap around to the top.  Win32 does *
 * not do this.  I decided to do this because it eliminates the need to *
 * do a massive memcpy() to scroll the contents of the buffer up to     *
 * scroll the screen on output, instead I just shift down the position  *
 * to be displayed, and let it wrap around to the top again.            *
 * The VirtualY member keeps track of the top Y coord that win32        *
 * clients THINK is currently being displayed, because they think that  *
 * when the display reaches the bottom of the buffer and another line   *
 * being printed causes another line to scroll down, that the buffer IS *
 * memcpy()'s up, and the bottom of the buffer is still displayed, but  *
 * internally, I just wrap back to the top of the buffer.               *
 ************************************************************************/

typedef struct _TEXTMODE_BUFFER_INFO
{
    COORD   ScreenBufferSize;
    COORD   ViewSize;
    USHORT  ScreenAttrib;
    USHORT  PopupAttrib;
    ULONG   CursorSize;
    BOOLEAN IsCursorVisible;
} TEXTMODE_BUFFER_INFO, *PTEXTMODE_BUFFER_INFO;

typedef struct _TEXTMODE_SCREEN_BUFFER
{
    CONSOLE_SCREEN_BUFFER;      /* Screen buffer base class - MUST BE IN FIRST PLACE */

    USHORT     VirtualY;        /* Top row of buffer being displayed, reported to callers */
    PCHAR_INFO Buffer;          /* Pointer to UNICODE screen buffer (Buffer->Char.UnicodeChar only is valid, not Char.AsciiChar) */

    USHORT ScreenDefaultAttrib; /* Default screen char attribute */
    USHORT PopupDefaultAttrib;  /* Default popup char attribute */
} TEXTMODE_SCREEN_BUFFER, *PTEXTMODE_SCREEN_BUFFER;


/*
 * See graphics.c for the implementation
 */

typedef struct _GRAPHICS_BUFFER_INFO
{
    CONSOLE_GRAPHICS_BUFFER_INFO Info;
} GRAPHICS_BUFFER_INFO, *PGRAPHICS_BUFFER_INFO;

typedef struct _GRAPHICS_SCREEN_BUFFER
{
    CONSOLE_SCREEN_BUFFER;          /* Screen buffer base class - MUST BE IN FIRST PLACE */

    ULONG   BitMapInfoLength;       /* Real size of the structure pointed by BitMapInfo */
    LPBITMAPINFO BitMapInfo;        /* Information on the bitmap buffer */
    ULONG   BitMapUsage;            /* See the uUsage parameter of GetDIBits */
    HANDLE  hSection;               /* Handle to the memory shared section for the bitmap buffer */
    PVOID   BitMap;                 /* Our bitmap buffer */

    PVOID   ClientBitMap;           /* A copy of the client view of our bitmap buffer */
    HANDLE  Mutex;                  /* Our mutex, used to synchronize read / writes to the bitmap buffer */
    HANDLE  ClientMutex;            /* A copy of the client handle to our mutex */
    HANDLE  ClientProcess;          /* Handle to the client process who opened the buffer, to unmap the view */
} GRAPHICS_SCREEN_BUFFER, *PGRAPHICS_SCREEN_BUFFER;



typedef struct _CONSOLE_INPUT_BUFFER
{
    CONSOLE_IO_OBJECT Header;       /* Object header - MUST BE IN FIRST PLACE */

    ULONG       InputBufferSize;    /* Size of this input buffer (maximum number of events) -- UNUSED!! */
    ULONG       NumberOfEvents;     /* Current number of events in the queue */
    LIST_ENTRY  InputEvents;        /* Input events queue list head */
    HANDLE      ActiveEvent;        /* Event set when an input event is added to the queue */

    USHORT      Mode;               /* Input buffer modes */
} CONSOLE_INPUT_BUFFER, *PCONSOLE_INPUT_BUFFER;


/*
 * Structure used to hold console information
 */
typedef struct _CONSOLE_INFO
{
    ULONG   InputBufferSize;
    COORD   ScreenBufferSize;
    COORD   ConsoleSize;    /* The size of the console */

    ULONG   CursorSize;
    BOOLEAN CursorBlinkOn;
    BOOLEAN ForceCursorOff;

    USHORT  ScreenAttrib; // CHAR_INFO ScreenFillAttrib
    USHORT  PopupAttrib;

    ULONG   CodePage;

} CONSOLE_INFO, *PCONSOLE_INFO;

typedef struct _TERMINAL TERMINAL, *PTERMINAL;

typedef struct _TERMINAL_VTBL
{
    /*
     * Internal interface (functions called by the console server only)
     */
    NTSTATUS (NTAPI *InitTerminal)(IN OUT PTERMINAL This,
                                   IN struct _CONSOLE* Console);
    VOID (NTAPI *DeinitTerminal)(IN OUT PTERMINAL This);



/************ Line discipline ***************/

    /* Interface used only for text-mode screen buffers */

    NTSTATUS (NTAPI *ReadStream)(IN OUT PTERMINAL This,
                                 IN BOOLEAN Unicode,
                                 OUT PVOID Buffer,
                                 IN OUT PCONSOLE_READCONSOLE_CONTROL ReadControl,
                                 IN PVOID Parameter OPTIONAL,
                                 IN ULONG NumCharsToRead,
                                 OUT PULONG NumCharsRead OPTIONAL);
    NTSTATUS (NTAPI *WriteStream)(IN OUT PTERMINAL This,
                                  PTEXTMODE_SCREEN_BUFFER Buff,
                                  PWCHAR Buffer,
                                  DWORD Length,
                                  BOOL Attrib);

/************ Line discipline ***************/



    /* Interface used for both text-mode and graphics screen buffers */
    VOID (NTAPI *DrawRegion)(IN OUT PTERMINAL This,
                             SMALL_RECT* Region);
    BOOL (NTAPI *SetCursorInfo)(IN OUT PTERMINAL This,
                                PCONSOLE_SCREEN_BUFFER ScreenBuffer);
    BOOL (NTAPI *SetScreenInfo)(IN OUT PTERMINAL This,
                                PCONSOLE_SCREEN_BUFFER ScreenBuffer,
                                SHORT OldCursorX,
                                SHORT OldCursorY);
    VOID (NTAPI *ResizeTerminal)(IN OUT PTERMINAL This);
    VOID (NTAPI *SetActiveScreenBuffer)(IN OUT PTERMINAL This);
    VOID (NTAPI *ReleaseScreenBuffer)(IN OUT PTERMINAL This,
                                      IN PCONSOLE_SCREEN_BUFFER ScreenBuffer);

    /*
     * External interface (functions corresponding to the Console API)
     */
    VOID (NTAPI *GetLargestConsoleWindowSize)(IN OUT PTERMINAL This,
                                              PCOORD pSize);
    BOOL (NTAPI *SetPalette)(IN OUT PTERMINAL This,
                             HPALETTE PaletteHandle,
                             UINT PaletteUsage);
    INT   (NTAPI *ShowMouseCursor)(IN OUT PTERMINAL This,
                                   BOOL Show);

#if 0 // Possible future terminal interface
    BOOL (NTAPI *GetTerminalProperty)(IN OUT PTERMINAL This,
                                      ULONG Flag,
                                      PVOID Info,
                                      ULONG Size);
    BOOL (NTAPI *SetTerminalProperty)(IN OUT PTERMINAL This,
                                      ULONG Flag,
                                      PVOID Info /*,
                                      ULONG Size */);
#endif
} TERMINAL_VTBL, *PTERMINAL_VTBL;

struct _TERMINAL
{
    PTERMINAL_VTBL Vtbl;        /* Virtual table */
    struct _CONSOLE* Console;   /* Console to which the terminal is attached to */
    PVOID Context;              /* Private context */
};

/*
 * WARNING: Change the state of the console ONLY when the console is locked !
 */
typedef enum _CONSOLE_STATE
{
    CONSOLE_INITIALIZING,   /* Console is initializing */
    CONSOLE_RUNNING     ,   /* Console running */
    CONSOLE_TERMINATING ,   /* Console about to be destroyed (but still not) */
    CONSOLE_IN_DESTRUCTION  /* Console in destruction */
} CONSOLE_STATE, *PCONSOLE_STATE;

typedef struct _CONSOLE
{
/******************************* Console Set-up *******************************/
    LONG ReferenceCount;                    /* Is incremented each time a handle to something in the console (a screen-buffer or the input buffer of this console) gets referenced */
    CRITICAL_SECTION Lock;

    CONSOLE_STATE State;                    /* State of the console */
    TERMINAL TermIFace;                     /* Terminal-specific interface */

    BOOLEAN ConsolePaused;                  /* If TRUE, the console is paused */

/******************************** Input buffer ********************************/
    CONSOLE_INPUT_BUFFER InputBuffer;       /* Input buffer of the console */
    UINT InputCodePage;

/******************************* Screen buffers *******************************/
    LIST_ENTRY BufferList;                  /* List of all screen buffers for this console */
    PCONSOLE_SCREEN_BUFFER ActiveBuffer;    /* Pointer to currently active screen buffer */
    UINT OutputCodePage;

/****************************** Other properties ******************************/
    COORD   ConsoleSize;                    /* The current size of the console, for text-mode only */
    BOOLEAN FixedSize;                      /* TRUE if the console is of fixed size */
    BOOLEAN IsCJK;                          /* TRUE if Chinese, Japanese or Korean (CJK) */
} CONSOLE, *PCONSOLE;

/* console.c */
VOID NTAPI
ConDrvPause(PCONSOLE Console);
VOID NTAPI
ConDrvUnpause(PCONSOLE Console);

#define GetConsoleInputBufferMode(Console)  \
    (Console)->InputBuffer.Mode


/* conoutput.c */
PCHAR_INFO ConioCoordToPointer(PTEXTMODE_SCREEN_BUFFER Buff, ULONG X, ULONG Y);
NTSTATUS ConioResizeBuffer(PCONSOLE Console,
                           PTEXTMODE_SCREEN_BUFFER ScreenBuffer,
                           COORD Size);

/* wcwidth.c */
int mk_wcwidth_cjk(wchar_t ucs);

// NOTE: The check against 0x80 is to avoid calling the helper function
// for characters that we already know are not full-width.
#define IS_FULL_WIDTH(wch)  \
    (((USHORT)(wch) >= 0x0080) && (mk_wcwidth_cjk(wch) == 2))

/* EOF */