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Annotation of 43BSD/contrib/emacs/src/cm.h, revision 1.1

1.1     ! root        1: /* Cursor motion calculation definitions for GNU Emacs
        !             2:    Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: This file is part of GNU Emacs.
        !             5: 
        !             6: GNU Emacs is distributed in the hope that it will be useful,
        !             7: but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: accepts responsibility to anyone for the consequences of using it
        !             9: or for whether it serves any particular purpose or works at all,
        !            10: unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: License for full details.
        !            12: 
        !            13: Everyone is granted permission to copy, modify and redistribute
        !            14: GNU Emacs, but only under the conditions described in the
        !            15: GNU Emacs General Public License.   A copy of this license is
        !            16: supposed to have been given to you along with GNU Emacs so you
        !            17: can know your rights and responsibilities.  It should be in a
        !            18: file named COPYING.  Among other things, the copyright notice
        !            19: and this notice must be preserved on all copies.  */
        !            20: 
        !            21: 
        !            22: /* This structure holds everything needed to do cursor motion except the pad
        !            23:    character (PC) and the output speed of the terminal (ospeed), which
        !            24:    termcap wants in global variables. */
        !            25: 
        !            26: extern struct cm {
        !            27:        /* Cursor position */
        !            28:        int     cm_curY,        /* current row */
        !            29:                cm_curX;        /* current column */
        !            30:                                /* -1 in either one means position unknown */
        !            31:        /* Capabilities from termcap(5) (including extensions) */
        !            32:        char    *cm_up,         /* up (up) */
        !            33:                *cm_down,       /* down (do) */
        !            34:                *cm_left,       /* left (bs) */
        !            35:                *cm_right,      /* right (nd) */
        !            36:                *cm_home,       /* home (ho) */
        !            37:                *cm_cr,         /* carriage return (cr) */
        !            38:                *cm_ll,         /* last line (ll) */
        !            39:                *cm_abs,        /* absolute (cm) */
        !            40:                *cm_habs,       /* horizontal absolute (ch) */
        !            41:                *cm_vabs,       /* vertical absolute (cv) */
        !            42:                *cm_ds,         /* "don't send" string (ds) */
        !            43:                *cm_tab;        /* tab (ta) */
        !            44:        int     cm_tabwidth,    /* tab width (tw) */
        !            45:                cm_cols,        /* Number of cols on screen (co) */
        !            46:                cm_rows,        /* Number of rows on screen (li) */
        !            47:                cm_autowrap:1,  /* autowrap flag (am) */
        !            48:                cm_magicwrap:1, /* vt100s: cursor stays in last col but
        !            49:                                   will wrap if next char is printing (xn) */
        !            50:                cm_usetabs:1,   /* if set, use tabs */
        !            51:                cm_autolf:1,    /* \r performs a \r\n (rn) */
        !            52:                cm_losewrap:1;  /* if reach right margin, forget cursor location */
        !            53:        /* Costs */
        !            54:        int     cc_up,          /* cost for up */
        !            55:                cc_down,        /* etc */
        !            56:                cc_left,
        !            57:                cc_right,
        !            58:                cc_home,
        !            59:                cc_cr,
        !            60:                cc_ll,
        !            61:                cc_abs,         /* abs costs are actually min costs */
        !            62:                cc_habs,
        !            63:                cc_vabs,
        !            64:                cc_tab;
        !            65: } Wcm;
        !            66: 
        !            67: extern char PC;                        /* Pad character */
        !            68: extern short ospeed;           /* Output speed (from sg_ospeed) */
        !            69: 
        !            70: /* Shorthand */
        !            71: #ifndef NoCMShortHand
        !            72: #define        curY            Wcm.cm_curY
        !            73: #define        curX            Wcm.cm_curX
        !            74: #define        Up              Wcm.cm_up
        !            75: #define        Down            Wcm.cm_down
        !            76: #define        Left            Wcm.cm_left
        !            77: #define        Right           Wcm.cm_right
        !            78: #define        Home            Wcm.cm_home
        !            79: #define        CR              Wcm.cm_cr
        !            80: #define        LastLine        Wcm.cm_ll
        !            81: #define        Tab             Wcm.cm_tab
        !            82: #define        TabWidth        Wcm.cm_tabwidth
        !            83: #define        DontSend        Wcm.cm_ds
        !            84: #define        AbsPosition     Wcm.cm_abs
        !            85: #define        ColPosition     Wcm.cm_habs
        !            86: #define        RowPosition     Wcm.cm_vabs
        !            87: #define        AutoWrap        Wcm.cm_autowrap
        !            88: #define        MagicWrap       Wcm.cm_magicwrap
        !            89: #define        UseTabs         Wcm.cm_usetabs
        !            90: #define        AutoLF          Wcm.cm_autolf
        !            91: #define        ScreenRows      Wcm.cm_rows
        !            92: #define        ScreenCols      Wcm.cm_cols
        !            93: 
        !            94: #define        cmat(row,col)   (curY = (row), curX = (col))
        !            95: #define        cmplus(n)       {if ((curX += (n)) >= ScreenCols && !MagicWrap)\
        !            96:                           {if (Wcm.cm_losewrap) curY = -1; \
        !            97:                              else if (AutoWrap) curX = 0, curY++; else curX--;}}
        !            98: 
        !            99: extern void cmputc ();
        !           100: 
        !           101: #endif

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