/*      $NetBSD: curses_private.h,v 1.83 2026/06/29 06:01:44 blymn Exp $        */

/*-
 * Copyright (c) 1998-2000 Brett Lymn
 *                         (blymn@baea.com.au, brett_lymn@yahoo.com.au)
 * All rights reserved.
 *
 * This code has been donated to The NetBSD Foundation by the Author.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 */

/* Modified by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>
 * to add support for wide characters
 * Changes:
 * - Add a compiler variable HAVE_WCHAR for wide character only code
 * - Add a pointer to liked list of non-spacing characters in __ldata
 *   and the macro to access the width field in the attribute field
 * - Add a circular input character buffer in __screen to handle
 *   wide-character input (used in get_wch())
 */

#include <term.h>
#include <termios.h>

/* Private structure definitions for curses. */

/* Termcap capabilities. */
#ifdef HAVE_WCHAR
/*
 * Add a list of non-spacing characters to each spacing
 * character in a singly linked list
 */
typedef struct nschar_t {
        wchar_t                 ch;             /* Non-spacing character */
        struct nschar_t *next;  /* Next non-spacing character */
} nschar_t;
#endif /* HAVE_WCHAR */

/*
 * A window is an array of __LINE structures pointed to by the 'lines' pointer.
 * A line is an array of __LDATA structures pointed to by the 'line' pointer.
 *
 * IMPORTANT: the __LDATA structure must NOT induce any padding, so if new
 * fields are added -- padding fields with *constant values* should ensure
 * that the compiler will not generate any padding when storing an array of
 *  __LDATA structures.  This is to enable consistent use of memcmp, and memcpy
 * for comparing and copying arrays.
 */

struct __ldata {
        wchar_t ch;                     /* Character */
        attr_t  attr;                   /* Attributes */
#define CA_CONTINUATION         0x0001  /* a continuation cell */
#define CA_BACKGROUND           0x0002  /* background char */
        int16_t         cflags;         /* internal attributes for wide char */
#ifdef HAVE_WCHAR
        nschar_t        *nsp;   /* Foreground non-spacing character pointer */
        int16_t         wcols;          /* display width of a wide char */
#endif /* HAVE_WCHAR */
};

#define __LDATASIZE     (sizeof(__LDATA))

struct __line {
#ifdef DEBUG
#define SENTINEL_VALUE 0xaac0ffee

        unsigned int sentinel;          /* try to catch line overflows */
#endif
#define __ISDIRTY       0x01            /* Line is dirty. */
#define __ISPASTEOL     0x02            /* Cursor is past end of line */
#define __ISFORCED      0x04            /* Force update, no optimisation */
        unsigned int flags;
        uint32_t hash;                  /* Hash value for the line. */
        int *firstchp, *lastchp;        /* First and last chngd columns ptrs */
        int firstch, lastch;            /* First and last changed columns. */
        __LDATA *line;                  /* Pointer to the line text. */
};

struct __window {               /* Window structure. */
        struct __window *nextp, *orig;  /* Subwindows list and parent. */
        int begy, begx;                 /* Window home. */
        int cury, curx;                 /* Current x, y coordinates. */
        int maxy, maxx;                 /* Maximum values for curx, cury. */
        int reqy, reqx;                 /* Size requested when created */
        int ch_off;                     /* x offset for firstch/lastch. */
        __LINE **alines;                /* Array of pointers to the lines */
        __LINE  *lspace;                /* line space (for cleanup) */
        __LDATA *wspace;                /* window space (for cleanup) */

#define __ENDLINE       0x00000001      /* End of screen. */
#define __FLUSH         0x00000002      /* Fflush(stdout) after refresh. */
#define __FULLWIN       0x00000004      /* Window is a screen. */
#define __IDLINE        0x00000008      /* Insert/delete sequences. */
#define __SCROLLWIN     0x00000010      /* Last char will scroll window. */
#define __SCROLLOK      0x00000020      /* Scrolling ok. */
#define __CLEAROK       0x00000040      /* Clear on next refresh. */
#define __LEAVEOK       0x00000100      /* If cursor left */
#define __KEYPAD        0x00010000      /* If interpreting keypad codes */
#define __NOTIMEOUT     0x00020000      /* Wait indefinitely for func keys */
#define __IDCHAR        0x00040000      /* insert/delete char sequences */
#define __ISPAD         0x00080000      /* "window" is a pad */
#define __ISDERWIN      0x00100000      /* "window" is derived from parent */
#define __IMMEDOK       0x00200000      /* refreshed when changed */
#define __SYNCOK        0x00400000      /* sync when changed */
#define __HALFDELAY     0x00800000      /* In half delay mode */
        unsigned int flags;
        int     delay;                  /* delay for getch() */
        attr_t  wattr;                  /* Character attributes */
        wchar_t bch;                    /* Background character */
        attr_t  battr;                  /* Background attributes */
        uint32_t wcols;                 /* Background column width */
        int     scr_t, scr_b;           /* Scrolling region top, bottom */
        SCREEN  *screen;                /* Screen for this window */
        int     pbegy, pbegx,
                sbegy, sbegx,
                smaxy, smaxx;           /* Saved prefresh() values */
        int     dery, derx;             /* derived window coordinates
                                           - top left corner of source 
                                           relative to parent win */
#ifdef HAVE_WCHAR
        nschar_t *bnsp;                 /* Background non-spacing char list */
#endif /* HAVE_WCHAR */
        FILE    *fp;                    /* for window formatted printf */
        char    *buf;                   /* buffer for window formatted printf */
        size_t   buflen;                /* length of above buffer */
};

/* Set of attributes unset by 'me' - 'mb', 'md', 'mh', 'mk', 'mp' and 'mr'. */
#ifndef HAVE_WCHAR
#define __TERMATTR \
        (__REVERSE | __BLINK | __DIM | __BOLD | __BLANK | __PROTECT)
#else
#define __TERMATTR \
        (__REVERSE | __BLINK | __DIM | __BOLD | __BLANK | __PROTECT \
        | WA_TOP | WA_LOW | WA_LEFT | WA_RIGHT | WA_HORIZONTAL | WA_VERTICAL)
#endif /* HAVE_WCHAR */

struct __winlist {
        struct __window         *winp;  /* The window. */
        struct __winlist        *nextp; /* Next window. */
};

struct __color {
        short   num;
        short   red;
        short   green;
        short   blue;
        int     flags;
};

/* List of colour pairs */
struct __pair {
        short   fore;
        short   back;
        int     flags;
};

/* Maximum colours */
#define MAX_COLORS      256
/* Maximum colour pairs - determined by number of colour bits in attr_t */
#define MAX_PAIRS       PAIR_NUMBER(__COLOR)

typedef struct keymap keymap_t;

/* POSIX allows up to 8 columns in a label. */
#define MAX_SLK_COLS    8
#ifdef HAVE_WCHAR
#define MAX_SLK_LABEL   sizeof(wchar_t) * MAX_SLK_COLS
#else
#define MAX_SLK_LABEL   MAX_SLK_COLS
#endif
struct __slk_label {
        char    *text;
        int      justify;
#define SLK_JUSTIFY_LEFT        0
#define SLK_JUSTIFY_CENTER      1
#define SLK_JUSTIFY_RIGHT       2
        char     label[MAX_SLK_LABEL + 1];
        int      x;
};

#define MAX_RIPS        5
struct __ripoff {
        int     nlines;
        WINDOW  *win;
};

/* this is the encapsulation of the terminal definition, one for
 * each terminal that curses talks to.
 */
struct __screen {
        FILE    *infd, *outfd;  /* input and output file descriptors */
        WINDOW  *curscr;        /* Current screen. */
        WINDOW  *stdscr;        /* Standard screen. */
        WINDOW  *__virtscr;     /* Virtual screen (for doupdate()). */
        int      curwin;        /* current window for refresh */
        int      lx, ly;        /* loop parameters for refresh */
        int      COLS;          /* Columns on the screen. */
        int      LINES;         /* Lines on the screen. */
        int      nripped;       /* Number of ripofflines. */
        struct __ripoff ripped[MAX_RIPS];       /* ripofflines. */
        int      ESCDELAY;      /* Delay between keys in esc seq's. */
#define ESCDELAY_DEFAULT        300 /* milliseconds. */
        int      TABSIZE;       /* Size of a tab. */
#define TABSIZE_DEFAULT         8   /* spaces. */
        int      COLORS;        /* Maximum colors on the screen */
        int      COLOR_PAIRS;   /* Maximum color pairs on the screen */
        short    curpair;       /* current colour pair set on the terminal */
        int      My_term;       /* Use Def_term regardless. */
        char     GT;            /* Gtty indicates tabs. */
        char     NONL;          /* Term can't hack LF doing a CR. */
        char     UPPERCASE;     /* Terminal is uppercase only. */

        chtype acs_char[NUM_ACS];
#ifdef HAVE_WCHAR
        cchar_t wacs_char[ NUM_ACS ];
#endif /* HAVE_WCHAR */
        struct __color colours[MAX_COLORS];
        struct __pair  colour_pairs[MAX_PAIRS];
        attr_t  nca;

/* Style of colour manipulation */
#define COLOR_NONE      0
#define COLOR_ANSI      1       /* ANSI/DEC-style colour manipulation */
#define COLOR_HP        2       /* HP-style colour manipulation */
#define COLOR_TEK       3       /* Tektronix-style colour manipulation */
#define COLOR_OTHER     4       /* None of the others but can set fore/back */
        int color_type;

        attr_t mask_op;
        attr_t mask_me;
        attr_t mask_ue;
        attr_t mask_se;
        TERMINAL *term;
        int old_mode; /* old cursor visibility state for terminal */
        keymap_t *base_keymap;
        int echoit;
        int pfast;
        int rawmode;
        int nl;
        int noqch;
        int clearok;
        int useraw;
        struct __winlist *winlistp;
        struct   termios cbreakt, rawt, *curt, save_termios;
        struct termios orig_termios, baset, savedtty;
        int ovmin;
        int ovtime;
        char *stdbuf;
        unsigned int len;
        int meta_state;
        char padchar;
        int endwin;
        int notty;
        int resized;
        wchar_t *unget_list;
        int unget_len, unget_pos;
        int filtered;
        int checkfd;

        /* soft label key */
        bool             is_term_slk;
        WINDOW          *slk_window;
        int              slk_format;
#define SLK_FMT_INVAL   -1
#define SLK_FMT_3_2_3   0
#define SLK_FMT_4_4     1
        int              slk_nlabels;
        int              slk_label_len;
        bool             slk_hidden;
        struct __slk_label *slk_labels;

#define MAX_CBUF_SIZE 8
#ifdef HAVE_WCHAR
        int             cbuf_head;              /* header to cbuf */
        int             cbuf_tail;              /* tail to cbuf */
        int             cbuf_cur;               /* the current char in cbuf */
        mbstate_t       sp;                     /* wide char processing state */
        char            cbuf[ MAX_CBUF_SIZE ];  /* input character buffer */
#endif /* HAVE_WCHAR */
};


extern char      __GT;                  /* Gtty indicates tabs. */
extern char      __NONL;                /* Term can't hack LF doing a CR. */
extern char      __UPPERCASE;           /* Terminal is uppercase only. */
extern int       My_term;               /* Use Def_term regardless. */
extern const char       *Def_term;      /* Default terminal type. */
extern SCREEN   *_cursesi_screen;       /* The current screen in use */

/* Debugging options/functions. */
#ifdef DEBUG
#define __CTRACE_TSTAMP         0x00000001
#define __CTRACE_MISC           0x00000002
#define __CTRACE_INIT           0x00000004
#define __CTRACE_SCREEN         0x00000008
#define __CTRACE_WINDOW         0x00000010
#define __CTRACE_REFRESH        0x00000020
#define __CTRACE_COLOR          0x00000040
#define __CTRACE_INPUT          0x00000080
#define __CTRACE_OUTPUT         0x00000100
#define __CTRACE_LINE           0x00000200
#define __CTRACE_ATTR           0x00000400
#define __CTRACE_ERASE          0x00000800
#define __CTRACE_FILEIO         0x00001000
#define __CTRACE_ALL            0x7fffffff
void     __CTRACE(int, const char *, ...) __attribute__((__format__(__printf__, 2, 3)));
#else
#define __CTRACE(area, fmt, ...)        __nothing
#endif

/* Common erase logic */
#ifdef HAVE_WCHAR
#define __NEED_ERASE(_sp, _bch, _battr)                         \
        ((_sp)->ch != (_bch) ||                                 \
        (((_sp)->cflags & CA_BACKGROUND) != CA_BACKGROUND) ||   \
            ((_sp)->attr & WA_ATTRIBUTES) != (_battr) ||        \
            (_sp)->nsp != NULL ||                               \
            (_sp)->wcols < 0)
#else
#define __NEED_ERASE(_sp, _bch, _battr)                         \
        ((_sp)->ch != (_bch) || (_sp)->attr != (_battr))
#endif

/* Private functions. */
int     __cputchar_args(int, void *);
void     _cursesi_free_keymap(keymap_t *);
int      _cursesi_gettmode(SCREEN *);
void     _cursesi_reset_acs(SCREEN *);
int     _cursesi_addbyte(WINDOW *, __LINE **, int *, int *, int , attr_t, int);
int     _cursesi_addwchar(WINDOW *, __LINE **, int *, int *, const cchar_t *,
                          int);
int     _cursesi_waddbytes(WINDOW *, const char *, int, attr_t, int);
#ifdef HAVE_WCHAR
void     _cursesi_reset_wacs(SCREEN *);
#endif /* HAVE_WCHAR */
void     _cursesi_resetterm(SCREEN *);
int      _cursesi_setterm(const char *, SCREEN *);
int      __delay(void);
uint32_t         __hash_more(const void *, size_t, unsigned int);
uint32_t         __hash_line(const __LDATA *, int);
#define __hash(s, len)  __hash_more((s), (len), 0u)
void     __id_subwins(WINDOW *);
void     __init_getch(SCREEN *);
void     __init_acs(SCREEN *);
int      _cursesi_celleq(__LDATA *, __LDATA *);
#ifdef HAVE_WCHAR
void     __init_get_wch(SCREEN *);
void     __init_wacs(SCREEN *);
int     __cputwchar_args( wchar_t, void * );
void    _cursesi_copy_wchar(__LDATA *, __LDATA *);
int     _cursesi_copy_nsp(nschar_t *, struct __ldata *);
void    __cursesi_free_nsp(nschar_t *);
void    __cursesi_win_free_nsp(WINDOW *);
void    __cursesi_putnsp(nschar_t *, const int, const int);
void    __cursesi_chtype_to_cchar(chtype, cchar_t *);
#endif /* HAVE_WCHAR */
int      __fgetc_resize(FILE *);
int      __unget(wint_t);
int      __mvcur(int, int, int, int, int);
WINDOW  *__newwin(SCREEN *, int, int, int, int, int, int);
int      __nodelay(void);
int      __notimeout(void);
void     __restartwin(void);
void     __restore_colors(void);
void     __restore_cursor_vis(void);
void     __restore_meta_state(void);
void     __restore_termios(void);
void     __restore_stophandler(void);
void     __restore_winchhandler(void);
int      __ripoffscreen(SCREEN *);
int      __ripoffresize(SCREEN *);
void     __ripofftouch(SCREEN *);
int      __rippedlines(const SCREEN *, int);
void     __save_termios(void);
void     __set_color(WINDOW *win, attr_t attr);
void     __set_stophandler(void);
void     __set_winchhandler(void);
void     __set_subwin(WINDOW *, WINDOW *);
int      __slk_init(SCREEN *);
void     __slk_free(SCREEN *);
int      __slk_resize(SCREEN *, int cols);
int      __slk_noutrefresh(SCREEN *);
void     __startwin(SCREEN *);
void     __stop_signal_handler(int);
int      __stopwin(void);
void     __swflags(WINDOW *);
void     __sync(WINDOW *);
int      __timeout(int);
int      __touchline(WINDOW *, int, int, int);
int      __touchwin(WINDOW *, int);
int      __unripoffline(int (*)(WINDOW *, int));
void     __unsetattr(int);
void     __unset_color(WINDOW *win);
int      __waddch(WINDOW *, __LDATA *);
int      __wgetnstr(WINDOW *, char *, int);
void     __winch_signal_handler(int);

/* Private #defines. */
#define min(a,b)        ((a) < (b) ? (a) : (b))
#define max(a,b)        ((a) > (b) ? (a ): (b))

/* Private externs. */
extern int               __echoit;
extern int               __endwin;
extern int               __pfast;
extern int               __rawmode;
extern int               __noqch;
extern attr_t            __mask_op, __mask_me, __mask_ue, __mask_se;
extern WINDOW           *__virtscr;
extern int               __using_color;
extern int               __do_color_init;
extern attr_t            __default_color;