minix/commands/elle/eef1.c

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2005-04-21 16:53:53 +02:00
/* 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.
*/
/*
* EEF1 Various functions
* Char move/ins/del
* Case change
* Char/word transpose
*/
#include "elle.h"
/* EFUN: "Insert Self" */
f_insself (c)
int c;
{
#if IMAGEN
fim_insself(c);
#else
#if FX_FILLMODE
extern int fill_mode;
if(fill_mode) fx_insfill(c);
else
#endif /*FX_FILLMODE*/
ed_insn(c, exp); /* Normal stuff */
#endif /*-IMAGEN*/
}
/* EFUN: "Quoted Insert"
** Inserts next char directly, <exp> number of times.
** Does not check anything about the char and does not do anything
** depending on the mode. In particular, CR is not turned into EOL.
*/
f_quotins()
{
ed_insn(cmd_read(), exp); /* Insert next char directly */
}
#if FX_CRLF
/* EFUN: "CRLF" */
f_crlf()
{
#if IMAGEN
fim_crlf();
#else
register int i;
if(e_goeol() == cur_dot /* If at end of current line */
&& exp == 1 /* and inserting only 1 new line */
&& e_lblankp() && e_lblankp()) /* and next 2 lines blank */
{ e_gocur(); /* Then just re-use next line. */
e_gonl(); /* Go to its start */
e_setcur(); /* and establish cur_dot there. */
ed_delete(e_dot(), e_eoldot()); /* Ensure any blanks flushed */
}
else
{ e_gocur(); /* Otherwise back to original place */
if((i = exp) > 0) /* and simply insert newlines */
do ed_crins();
while(--i);
}
#endif /*-IMAGEN*/
}
#endif /*FX_CRLF*/
/* EFUN: "Forward Character" */
f_fchar()
{ ed_igoff(exp);
}
/* EFUN: "Backward Character" */
f_bchar()
{ ed_igoff(-exp);
}
/* EFUN: "Delete Character" */
f_dchar ()
{
#if IMAGEN
fim_dchar();
#else
ef_deln(exp);
#endif /*-IMAGEN*/
}
/* EFUN: "Backward Delete Character" */
f_bdchar ()
{
#if IMAGEN
fim_bdchar();
#else
ef_deln(-exp);
#endif /*-IMAGEN*/
}
/* Delete forward or backward N characters.
* If arg, kills instead of deleting.
*/
ef_deln(x)
int x;
{
e_igoff(x);
if(exp_p) ed_kill(cur_dot, e_dot());
else ed_delete(cur_dot, e_dot());
}
#if FX_DELSPC
/* EFUN: "Delete Horizontal Space" */
/* Delete spaces/tabs around point.
*/
f_delspc()
{ chroff dot1;
e_gobwsp(); /* Move backward over whitespace */
dot1 = e_dot(); /* Save point */
e_gofwsp(); /* Move forward over whitespace */
ed_delete(dot1,e_dot()); /* Delete twixt start and here */
}
#endif /*FX_DELSPC*/
#if FX_TCHARS
/* EFUN: "Transpose Characters"
* Transpose chars before and after cursor. Doesn't hack args yet.
* EMACS: With positive arg, exchs chars before & after cursor, moves right,
* and repeats the specified # of times, dragging the char to the
* left of the cursor right.
* With negative arg, transposes 2 chars to left of cursor, moves
* between them, and repeats the specified # of times, exactly undoing
* the positive arg form. With zero arg, transposes chars at point
* and mark.
* HOWEVER: at the end of a line, with no arg, the preceding 2 chars
* are transposed.
*/
f_tchars()
{ register int c, c2;
#if IMAGEN
c = e_rgetc(); /* Gosmacs style: twiddle prev 2 */
if (c == EOF)
return(e_gocur()); /* Do nothing at beginning of bfr */
#else
if((c = e_getc()) == EOF /* If at EOF */
|| e_rgetc() == LF) /* or at end of line, */
c = e_rgetc(); /* use preceding 2 chars */
#endif /*-IMAGEN*/
if((c2 = e_rgetc()) == EOF) /* At beginning of buffer? */
return(e_gocur()); /* Yes, do nothing */
e_ovwc(c);
e_ovwc(c2);
e_setcur();
buf_tmod((chroff)-2); /* Munged these 2 chars */
}
#endif /*FX_TCHARS*/
#if FX_FWORD
/* EFUN: "Forward Word" */
f_fword()
{ chroff retdot;
if(e_wding(&retdot, exp))
ed_go(retdot);
}
#endif
#if FX_BWORD
/* EFUN: "Backward Word" */
f_bword()
{ exp = -exp;
f_fword();
}
#endif
#if FX_KWORD
/* EFUN: "Kill Word" */
f_kword()
{ chroff retdot;
if(e_wding(&retdot,exp))
{ ed_kill(cur_dot,retdot);
this_cmd = KILLCMD;
}
}
#endif
#if FX_BKWORD
/* EFUN: "Backward Kill Word" */
f_bkword()
{ exp = -exp;
f_kword();
}
#endif
#if FX_TWORDS
/* EFUN: "Transpose Words" */
/* Transpose word. Urk!
*/
f_twords()
{ register SBSTR *sd1, *sd2;
register SBBUF *sb;
chroff begwd1, endwd1, begwd2, endwd2;
endwd2 = e_wdot(cur_dot, 1); /* Go to end of 2nd word */
begwd2 = e_wdot(endwd2, -1); /* Go to beg of 2nd word */
if(begwd2 >= endwd2) /* If no 2nd word, punt. */
return;
begwd1 = e_wdot(begwd2, -1); /* Go to beg of 1st word */
endwd1 = e_wdot(begwd1, 1); /* Go to end of 1st word */
if(begwd1 >= endwd1) /* If no 1st word, punt. */
return;
if(endwd1 > begwd2) /* Avoid possible overlap */
return;
e_go(begwd2);
sb = (SBBUF *)cur_buf;
sd2 = sb_killn(sb, endwd2 - begwd2); /* Excise wd 2 first */
e_go(begwd1);
sd1 = sb_killn(sb, endwd1 - begwd1); /* Excise wd 1 */
sb_sins(sb, sd2); /* Replace with wd 2 */
e_goff(begwd2 - endwd1); /* Move past between stuff */
sb_sins(sb, sd1); /* Insert wd 1 */
e_setcur();
buf_tmat(begwd1); /* Modified this range */
}
#endif /*FX_TWORDS*/
/* Case hacking functions and support */
#if FX_UCWORD
/* EFUN: "Uppercase Word" */
f_ucword()
{ case_word(0);
}
#endif /*FX_UCWORD*/
#if FX_LCWORD
/* EFUN: "Lowercase Word" */
f_lcword()
{ case_word(1);
}
#endif /*FX_LCWORD*/
#if FX_UCIWORD
/* EFUN: "Uppercase Initial" */
f_uciword()
{ case_word(2);
}
#endif /*FX_UCIWORD*/
#if FX_UCWORD||FX_LCWORD||FX_UCIWORD
case_word (downp)
{ chroff retdot;
#if IMAGEN
chroff startdot;
/* Normalize our position to beginning of "current" word,
* where "current" is defined to be the current word we are in,
* or else the previous word if we are not in any word.
* All this silly nonsense just to perpetuate Gosmacs's
* wrong behaviour!
*/
startdot = cur_dot; /* Save current position */
e_getc(); /* If at beg of word, ensure we get inside it */
e_gowd(-1); /* Go to start of this or prev word */
e_setcur(); /* Set cur_dot */
#endif /*IMAGEN*/
if(e_wding(&retdot, exp))
{ ed_case(cur_dot,retdot,downp);
e_gosetcur(retdot);
}
#if IMAGEN
e_gosetcur(startdot);
#endif /*IMAGEN*/
}
#endif /* any case_word caller */