278 lines
6 KiB
C
278 lines
6 KiB
C
/* ELLE - Copyright 1982, 1984, 1987 by Ken Harrenstien, SRI International
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* This software is quasi-public; it may be used freely with
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* like software, but may NOT be sold or made part of licensed
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* products without permission of the author.
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*/
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/*
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* EEF1 Various functions
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* Char move/ins/del
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* Case change
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* Char/word transpose
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*/
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#include "elle.h"
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/* EFUN: "Insert Self" */
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f_insself (c)
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int c;
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{
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#if IMAGEN
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fim_insself(c);
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#else
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#if FX_FILLMODE
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extern int fill_mode;
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if(fill_mode) fx_insfill(c);
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else
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#endif /*FX_FILLMODE*/
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ed_insn(c, exp); /* Normal stuff */
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#endif /*-IMAGEN*/
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}
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/* EFUN: "Quoted Insert"
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** Inserts next char directly, <exp> number of times.
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** Does not check anything about the char and does not do anything
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** depending on the mode. In particular, CR is not turned into EOL.
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*/
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f_quotins()
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{
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ed_insn(cmd_read(), exp); /* Insert next char directly */
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}
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#if FX_CRLF
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/* EFUN: "CRLF" */
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f_crlf()
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{
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#if IMAGEN
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fim_crlf();
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#else
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register int i;
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if(e_goeol() == cur_dot /* If at end of current line */
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&& exp == 1 /* and inserting only 1 new line */
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&& e_lblankp() && e_lblankp()) /* and next 2 lines blank */
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{ e_gocur(); /* Then just re-use next line. */
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e_gonl(); /* Go to its start */
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e_setcur(); /* and establish cur_dot there. */
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ed_delete(e_dot(), e_eoldot()); /* Ensure any blanks flushed */
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}
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else
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{ e_gocur(); /* Otherwise back to original place */
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if((i = exp) > 0) /* and simply insert newlines */
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do ed_crins();
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while(--i);
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}
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#endif /*-IMAGEN*/
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}
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#endif /*FX_CRLF*/
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/* EFUN: "Forward Character" */
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f_fchar()
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{ ed_igoff(exp);
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}
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/* EFUN: "Backward Character" */
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f_bchar()
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{ ed_igoff(-exp);
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}
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/* EFUN: "Delete Character" */
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f_dchar ()
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{
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#if IMAGEN
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fim_dchar();
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#else
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ef_deln(exp);
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#endif /*-IMAGEN*/
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}
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/* EFUN: "Backward Delete Character" */
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f_bdchar ()
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{
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#if IMAGEN
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fim_bdchar();
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#else
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ef_deln(-exp);
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#endif /*-IMAGEN*/
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}
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/* Delete forward or backward N characters.
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* If arg, kills instead of deleting.
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*/
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ef_deln(x)
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int x;
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{
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e_igoff(x);
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if(exp_p) ed_kill(cur_dot, e_dot());
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else ed_delete(cur_dot, e_dot());
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}
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#if FX_DELSPC
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/* EFUN: "Delete Horizontal Space" */
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/* Delete spaces/tabs around point.
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*/
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f_delspc()
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{ chroff dot1;
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e_gobwsp(); /* Move backward over whitespace */
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dot1 = e_dot(); /* Save point */
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e_gofwsp(); /* Move forward over whitespace */
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ed_delete(dot1,e_dot()); /* Delete twixt start and here */
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}
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#endif /*FX_DELSPC*/
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#if FX_TCHARS
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/* EFUN: "Transpose Characters"
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* Transpose chars before and after cursor. Doesn't hack args yet.
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* EMACS: With positive arg, exchs chars before & after cursor, moves right,
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* and repeats the specified # of times, dragging the char to the
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* left of the cursor right.
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* With negative arg, transposes 2 chars to left of cursor, moves
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* between them, and repeats the specified # of times, exactly undoing
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* the positive arg form. With zero arg, transposes chars at point
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* and mark.
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* HOWEVER: at the end of a line, with no arg, the preceding 2 chars
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* are transposed.
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*/
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f_tchars()
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{ register int c, c2;
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#if IMAGEN
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c = e_rgetc(); /* Gosmacs style: twiddle prev 2 */
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if (c == EOF)
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return(e_gocur()); /* Do nothing at beginning of bfr */
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#else
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if((c = e_getc()) == EOF /* If at EOF */
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|| e_rgetc() == LF) /* or at end of line, */
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c = e_rgetc(); /* use preceding 2 chars */
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#endif /*-IMAGEN*/
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if((c2 = e_rgetc()) == EOF) /* At beginning of buffer? */
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return(e_gocur()); /* Yes, do nothing */
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e_ovwc(c);
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e_ovwc(c2);
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e_setcur();
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buf_tmod((chroff)-2); /* Munged these 2 chars */
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}
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#endif /*FX_TCHARS*/
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#if FX_FWORD
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/* EFUN: "Forward Word" */
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f_fword()
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{ chroff retdot;
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if(e_wding(&retdot, exp))
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ed_go(retdot);
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}
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#endif
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#if FX_BWORD
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/* EFUN: "Backward Word" */
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f_bword()
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{ exp = -exp;
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f_fword();
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}
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#endif
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#if FX_KWORD
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/* EFUN: "Kill Word" */
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f_kword()
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{ chroff retdot;
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if(e_wding(&retdot,exp))
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{ ed_kill(cur_dot,retdot);
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this_cmd = KILLCMD;
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}
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}
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#endif
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#if FX_BKWORD
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/* EFUN: "Backward Kill Word" */
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f_bkword()
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{ exp = -exp;
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f_kword();
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}
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#endif
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#if FX_TWORDS
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/* EFUN: "Transpose Words" */
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/* Transpose word. Urk!
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*/
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f_twords()
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{ register SBSTR *sd1, *sd2;
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register SBBUF *sb;
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chroff begwd1, endwd1, begwd2, endwd2;
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endwd2 = e_wdot(cur_dot, 1); /* Go to end of 2nd word */
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begwd2 = e_wdot(endwd2, -1); /* Go to beg of 2nd word */
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if(begwd2 >= endwd2) /* If no 2nd word, punt. */
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return;
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begwd1 = e_wdot(begwd2, -1); /* Go to beg of 1st word */
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endwd1 = e_wdot(begwd1, 1); /* Go to end of 1st word */
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if(begwd1 >= endwd1) /* If no 1st word, punt. */
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return;
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if(endwd1 > begwd2) /* Avoid possible overlap */
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return;
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e_go(begwd2);
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sb = (SBBUF *)cur_buf;
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sd2 = sb_killn(sb, endwd2 - begwd2); /* Excise wd 2 first */
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e_go(begwd1);
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sd1 = sb_killn(sb, endwd1 - begwd1); /* Excise wd 1 */
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sb_sins(sb, sd2); /* Replace with wd 2 */
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e_goff(begwd2 - endwd1); /* Move past between stuff */
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sb_sins(sb, sd1); /* Insert wd 1 */
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e_setcur();
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buf_tmat(begwd1); /* Modified this range */
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}
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#endif /*FX_TWORDS*/
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/* Case hacking functions and support */
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#if FX_UCWORD
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/* EFUN: "Uppercase Word" */
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f_ucword()
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{ case_word(0);
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}
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#endif /*FX_UCWORD*/
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#if FX_LCWORD
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/* EFUN: "Lowercase Word" */
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f_lcword()
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{ case_word(1);
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}
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#endif /*FX_LCWORD*/
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#if FX_UCIWORD
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/* EFUN: "Uppercase Initial" */
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f_uciword()
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{ case_word(2);
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}
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#endif /*FX_UCIWORD*/
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#if FX_UCWORD||FX_LCWORD||FX_UCIWORD
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case_word (downp)
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{ chroff retdot;
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#if IMAGEN
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chroff startdot;
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/* Normalize our position to beginning of "current" word,
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* where "current" is defined to be the current word we are in,
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* or else the previous word if we are not in any word.
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* All this silly nonsense just to perpetuate Gosmacs's
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* wrong behaviour!
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*/
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startdot = cur_dot; /* Save current position */
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e_getc(); /* If at beg of word, ensure we get inside it */
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e_gowd(-1); /* Go to start of this or prev word */
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e_setcur(); /* Set cur_dot */
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#endif /*IMAGEN*/
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if(e_wding(&retdot, exp))
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{ ed_case(cur_dot,retdot,downp);
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e_gosetcur(retdot);
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}
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#if IMAGEN
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e_gosetcur(startdot);
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#endif /*IMAGEN*/
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}
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#endif /* any case_word caller */
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