/* $OpenBSD: wsemul_vt100var.h,v 1.14 2024/11/05 08:12:08 miod Exp $ */
/* $NetBSD: wsemul_vt100var.h,v 1.5 2000/04/28 21:56:17 mycroft Exp $ */

/*
 * Copyright (c) 1998
 *      Matthias Drochner.  All rights reserved.
 *
 * 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. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 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.
 *
 */

#define VT100_EMUL_NARGS        10      /* max # of args to a command */

struct wsemul_vt100_emuldata {
        const struct wsdisplay_emulops *emulops;
        struct wsemul_abortstate abortstate;
        void *emulcookie;
        int scrcapabilities;
        u_int nrows, ncols, crow, ccol;
        uint32_t defattr;               /* default attribute */

        uint32_t kernattr;              /* attribute for kernel output */
        void *cbcookie;
#ifdef DIAGNOSTIC
        int console;
#endif

        u_int state;                    /* processing state */
        int flags;
#define VTFL_LASTCHAR   0x001   /* printed last char on line (below cursor) */
#define VTFL_INSERTMODE 0x002
#define VTFL_APPLKEYPAD 0x004
#define VTFL_APPLCURSOR 0x008
#define VTFL_DECOM      0x010   /* origin mode */
#define VTFL_DECAWM     0x020   /* auto wrap */
#define VTFL_CURSORON   0x040
#define VTFL_NATCHARSET 0x080   /* national replacement charset mode */
#define VTFL_SAVEDCURS  0x100   /* we have a saved cursor state */
#define VTFL_UTF8       0x200   /* utf-8 character set */
        uint32_t curattr, bkgdattr;     /* currently used attribute */
        int attrflags, fgcol, bgcol;    /* properties of curattr */
        u_int scrreg_startrow;
        u_int scrreg_nrows;
        char *tabs;
#ifdef HAVE_DOUBLE_WIDTH_HEIGHT
        char *dblwid;
        int dw;
#endif

        int chartab0, chartab1;
        u_int *chartab_G[4];
        u_int *isolatin1tab, *decgraphtab, *dectechtab;
        u_int *nrctab;
        int sschartab; /* single shift */

        int nargs;
        u_int args[VT100_EMUL_NARGS]; /* numeric command args (CSI/DCS) */

        char modif1;    /* {>?} in VT100_EMUL_STATE_CSI */
        char modif2;    /* {!"$&} in VT100_EMUL_STATE_CSI */

        int designating;        /* substate in VT100_EMUL_STATE_SCS* */

        int dcstype;            /* substate in VT100_EMUL_STATE_STRING */
        char *dcsarg;
        int dcspos;
#define DCS_MAXLEN 256 /* ??? */
#define DCSTYPE_TABRESTORE 1 /* DCS2$t */

        u_int savedcursor_row, savedcursor_col;
        uint32_t savedattr, savedbkgdattr;
        int savedattrflags, savedfgcol, savedbgcol;
        int savedchartab0, savedchartab1;
        u_int *savedchartab_G[4];

        struct wsemul_inputstate instate;       /* userland input state */
        struct wsemul_inputstate kstate;        /* kernel input state */

#ifdef HAVE_UTF8_SUPPORT
        u_char translatebuf[4];
#else
        u_char translatebuf[1];
#endif
};

/* some useful utility macros */
#define ARG(n)                  (edp->args[(n)])
#define DEF1_ARG(n)             (ARG(n) ? ARG(n) : 1)
#define DEFx_ARG(n, x)          (ARG(n) ? ARG(n) : (x))
/* the following two can be negative if we are outside the scrolling region */
#define ROWS_ABOVE      ((int)edp->crow - (int)edp->scrreg_startrow)
#define ROWS_BELOW      ((int)(edp->scrreg_startrow + edp->scrreg_nrows) \
                                        - (int)edp->crow - 1)
#ifdef HAVE_DOUBLE_WIDTH_HEIGHT
#define CHECK_DW do { \
        if (edp->dblwid && edp->dblwid[edp->crow]) { \
                edp->dw = 1; \
                if (edp->ccol > (edp->ncols >> 1) - 1) \
                        edp->ccol = (edp->ncols >> 1) - 1; \
        } else \
                edp->dw = 0; \
} while (0)
#define NCOLS           (edp->ncols >> edp->dw)
#define COPYCOLS(f, t, n)       (edp->emulcookie, edp->crow, (f) << edp->dw, \
                                 (t) << edp->dw, (n) << edp->dw)
#define ERASECOLS(f, n, a)      (edp->emulcookie, edp->crow, (f) << edp->dw, \
                                 (n) << edp->dw, (a))
#else
#define CHECK_DW do { } while (0)
#define NCOLS           (edp->ncols)
#define COPYCOLS(f, t, n)       (edp->emulcookie, edp->crow, (f), (t), (n))
#define ERASECOLS(f, n, a)      (edp->emulcookie, edp->crow, (f), (n), (a))
#endif
#define COLS_LEFT       (NCOLS - edp->ccol - 1)

/*
 * response to primary DA request
 * operating level: 61 = VT100, 62 = VT200, 63 = VT300
 * extensions: 1 = 132 cols, 2 = printer port, 6 = selective erase,
 *      7 = soft charset, 8 = UDKs, 9 = NRC sets
 * VT100 = "033[?1;2c"
 */
#define WSEMUL_VT_ID1 "\033[?62;6c"
/*
 * response to secondary DA request
 * ident code: 24 = VT320
 * firmware version
 * hardware options: 0 = no options
 */
#define WSEMUL_VT_ID2 "\033[>24;20;0c"

void    wsemul_vt100_reset(struct wsemul_vt100_emuldata *);
int     wsemul_vt100_scrollup(struct wsemul_vt100_emuldata *, int);
int     wsemul_vt100_scrolldown(struct wsemul_vt100_emuldata *, int);
int     wsemul_vt100_ed(struct wsemul_vt100_emuldata *, int);
int     wsemul_vt100_el(struct wsemul_vt100_emuldata *, int);
int     wsemul_vt100_handle_csi(struct wsemul_vt100_emuldata *,
            struct wsemul_inputstate *, int);
void    wsemul_vt100_handle_dcs(struct wsemul_vt100_emuldata *);

int     wsemul_vt100_translate(void *cookie, kbd_t, keysym_t, const u_char **);

void    vt100_initchartables(struct wsemul_vt100_emuldata *);
int     vt100_setnrc(struct wsemul_vt100_emuldata *, int);

int     wsemul_vt100_output_normal(struct wsemul_vt100_emuldata *,
            struct wsemul_inputstate *, int, int);