source: trunk/minix/commands/elle/eef3.c@ 11

/* ELLE - Copyright 1982, 1984, 1987 by Ken Harrenstien, SRI International
 *      This software is quasi-public; it may be used freely with
 *      like software, but may NOT be sold or made part of licensed
 *      products without permission of the author.
 */
/*
 * EEF3         Various Functions (Yanking, Indentation, miscellaneous)
 */

#include "elle.h"

#if FX_APPNKILL
/* EFUN: "Append Next Kill" */
f_appnkill()
{       this_cmd = KILLCMD;     /* Fake out next call to ed_kill */
}
#endif /*FX_APPNKILL*/

#if FX_UNKILL
/* EFUN: "Un-kill" */
f_unkill()
{       register SBSTR *sd;

        if((sd = kill_ring[kill_ptr]) == 0)
          {     ring_bell();
                return;
          }
        mark_dot = cur_dot;             /* Set mark at old location */
        mark_p = 1;                     /* Mark's been set */
        sb_sins((SBBUF *)cur_buf,sbs_cpy(sd));  /* Insert copy of stuff */
        cur_dot = e_dot();              /* We're now after the new stuff */
        buf_tmat(mark_dot);             /* Say modified from here to cur_dot*/
        this_cmd = YANKCMD;
}
#endif /*FX_UNKILL*/

#if FX_UNKPOP
/* EFUN: "Un-kill Pop" */
f_unkpop()
{       register SBSTR *sd;
        register int i;

        if (last_cmd != YANKCMD)
          {     ring_bell ();
                return;
          }
        ed_delete(cur_dot,mark_dot);
        if(cur_dot > mark_dot)
                cur_dot = mark_dot;
        i = KILL_LEN;
        do {
                if(--kill_ptr < 0)
                        kill_ptr = KILL_LEN-1;
                if(sd = kill_ring[kill_ptr])
                        break;
          } while(--i);

        /* kill_ptr now pointing to right place; effect the yank. */
        e_gocur();              /* Make sure point at right place too! */
        return(f_unkill());
}
#endif /*FX_UNKPOP*/


/* Indentation routines - still not polished */

#if FX_INDATM
/* EFUN: "Indent According to Mode" */
/*      In Fundamental mode, just inserts a tab.
*/
f_indatm()
{       f_insself(TAB);         /* This takes care of mode checking */
}
#endif /*FX_INDATM*/

#if FX_INDNL
/* EFUN: "Indent New Line" */
f_indnl()                       /* execute CR followed by tab */
{
#if IMAGEN
        /* Not dispatch-based, but rather hard-wired to do Gosmacs thing */
        ed_crins();
        f_indund();
#else
        cmd_xct(CR);
        cmd_xct(TAB);
#endif /*-IMAGEN*/
}
#endif /*FX_INDNL*/


#if FX_BACKIND
/* EFUN: "Back to Indentation"
**      Moves to end of current line's indentation.
*/
f_backind()
{       e_gobol();      /* First move to beg of line */
        e_gofwsp();     /* Then forward over whitespace */
        ed_setcur();
}
#endif /*FX_BACKIND*/


#if FX_INDCOMM

static char *comm_beg = "/* ";
static char *comm_end = " */";

/* EFUN: "Indent for Comment" */
f_indcomm()
{
        f_endline();
        if(indtion(cur_dot) < ev_ccolumn)
                ed_indto(ev_ccolumn);
        else ed_sins("  ");
        ed_sins (comm_beg);
        ed_sins (comm_end);
        e_igoff(-strlen (comm_end));       /* back over end string */
        e_setcur();
}
#endif /*FX_INDCOMM*/

#if FX_INDREL
/* EFUN: "Indent Relative" */
/* This used to mistakenly be called Indent Under.
**      Still not fully implemented.
**      If at beginning of line, looks back at previous indented line,
** and indents this line that much.  If there is no preceding indented
** line or not at beginning of line, insert a tab.
*/
f_indrel()
{       register int c;
        register  n;
#if IMAGEN
        chroff savdot;
#endif /*IMAGEN*/
#if ICONOGRAPHICS
        chroff savdot;
        int curind, newind, morebuf;
#endif /*ICONOGRAPHICS*/

        if((c = e_rgetc()) == EOF)
#if IMAGEN
                return(f_insself(TAB)); /* Do mode-based tabbing */
#else
                return(ed_insert(TAB));
#endif /*-IMAGEN*/

        if(c == LF)
          {     e_gobol();
                e_gofwsp();
                n = d_curind();
                e_gonl();               /* Return to orig pos */
                if(n)
                  {     ed_indto(n);
#if IMAGEN
                        savdot = e_dot();
                        e_gofwsp();
                        ed_delete(savdot, e_dot());
#endif /*IMAGEN*/
                        return;
                  }
          }
#if ICONOGRAPHICS
        else
          {     e_igoff (1);
                curind = indtion (savdot = e_dot ());
                                /* get current dot and indentation */
                while (1)       /* find a prev line that extends rightward */
                   {    morebuf = e_gopl ();
                        e_goeol ();
                        if ((newind = d_curind()) > curind) break;
                        if (morebuf == 0)  /* hit beginning of buffer */
                        {       e_go (savdot);
                                f_delspc();
                                return (1);
                        }
                   }

                e_gobol ();
                e_igoff (inindex (e_dot (), curind));
                if (d_curind() > curind)
                        e_rgetc ();              /* pushed ahead by tab */

                while (c_wsp (e_getc ()) == 0) ;
                e_backc ();
                e_fwsp ();
                newind = d_curind();
                e_go (savdot);
                f_delspc();
                ed_indto (newind);
           }
#else
        else e_getc();
#if IMAGEN
        f_insself(TAB);                 /* Do mode-based tabbing */
#else
        ed_insert(TAB);
#endif /*-IMAGEN*/
#endif /*-ICONOGRAPHICS*/
}
#endif /*FX_INDREL*/



/* Paren matching stuff.  Note that this stuff will be very painful unless
** tinwait() works properly.
*/
#if 0
/* EFUN: "Self-Insert and Match" (intended to be bound to brackets) */
/* (KLH: Evidently this was never finished)
*/
insertmatch(c)
register int c;
{
        
}
#endif

/* Should change this to Matching Paren */
#if FX_MATCHBRACK
/* EFUN: "Match Bracket" (not EMACS) - from IMAGEN config
 * Show the matching bracket for the character right before dot
 */
f_matchbrack()
{
        chroff savdot;
        register int i, mc, secs;

        if (exp_p)
                secs = exp;
        else
                secs = 1;
        savdot = cur_dot;               /* Save our location */
        mc = e_rgetc();                 /* Pick up character before dot */
        if (mc != ')' && mc != ']' && mc != '}')
          {     e_getc();               /* Nothing, try at dot instead */
                e_getc();
                mc = e_rgetc();
                if (mc != ')' && mc != ']' && mc != '}')
                  {     ding("What bracket?");
                        e_go(savdot);
                        return;
                  }
          }
        if (! matchonelevel(mc))
                ring_bell();
        else
          {     ed_setcur();
                if (d_line(cur_dot) < 0)
                        secs = 10;      /* Wait longer if off-screen */
                redisplay();            /* Wish it were simple upd_wind() */
                for (i = 1; i <= secs; ++i)
                  {     if (tinwait())
                                break;
                        sleep(1);
                  }
          }
        e_gosetcur(savdot);             /* Back to origin */
        redp(RD_MOVE);                  /* Cursor has moved */
}


/* Try to match 'mc', return true iff found it */
matchonelevel(mc)
register int mc;
{
        register int c;

        while ((c = e_rgetc()) != EOF)
          {     if (c == /*[*/ ']' || c == /*(*/ ')' || c == /*{*/ '}')
                  {     if (! matchonelevel(c))
                                break;
                  }
                else if (c == '(' /*)*/)
                        return(mc == /*(*/ ')');
                else if (c == '[' /*]*/)
                        return(mc == /*[*/ ']');
                else if (c == '{' /*}*/)
                        return(mc == /*{*/ '}');
          }
        return(0);
}
#endif /*FX_MATCHBRACK*/