minix/commands/elle/eef3.c
2009-11-09 10:26:00 +00:00

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/* 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*/