282 lines
6.4 KiB
C
Executable file
282 lines
6.4 KiB
C
Executable file
/* 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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* EEF3 Various Functions (Yanking, Indentation, miscellaneous)
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*/
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#include "elle.h"
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#if FX_APPNKILL
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/* EFUN: "Append Next Kill" */
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f_appnkill()
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{ this_cmd = KILLCMD; /* Fake out next call to ed_kill */
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}
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#endif /*FX_APPNKILL*/
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#if FX_UNKILL
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/* EFUN: "Un-kill" */
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f_unkill()
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{ register SBSTR *sd;
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if((sd = kill_ring[kill_ptr]) == 0)
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{ ring_bell();
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return;
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}
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mark_dot = cur_dot; /* Set mark at old location */
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mark_p = 1; /* Mark's been set */
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sb_sins((SBBUF *)cur_buf,sbs_cpy(sd)); /* Insert copy of stuff */
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cur_dot = e_dot(); /* We're now after the new stuff */
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buf_tmat(mark_dot); /* Say modified from here to cur_dot*/
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this_cmd = YANKCMD;
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}
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#endif /*FX_UNKILL*/
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#if FX_UNKPOP
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/* EFUN: "Un-kill Pop" */
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f_unkpop()
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{ register SBSTR *sd;
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register int i;
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if (last_cmd != YANKCMD)
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{ ring_bell ();
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return;
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}
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ed_delete(cur_dot,mark_dot);
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if(cur_dot > mark_dot)
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cur_dot = mark_dot;
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i = KILL_LEN;
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do {
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if(--kill_ptr < 0)
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kill_ptr = KILL_LEN-1;
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if(sd = kill_ring[kill_ptr])
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break;
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} while(--i);
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/* kill_ptr now pointing to right place; effect the yank. */
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e_gocur(); /* Make sure point at right place too! */
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return(f_unkill());
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}
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#endif /*FX_UNKPOP*/
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/* Indentation routines - still not polished */
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#if FX_INDATM
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/* EFUN: "Indent According to Mode" */
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/* In Fundamental mode, just inserts a tab.
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*/
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f_indatm()
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{ f_insself(TAB); /* This takes care of mode checking */
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}
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#endif /*FX_INDATM*/
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#if FX_INDNL
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/* EFUN: "Indent New Line" */
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f_indnl() /* execute CR followed by tab */
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{
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#if IMAGEN
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/* Not dispatch-based, but rather hard-wired to do Gosmacs thing */
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ed_crins();
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f_indund();
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#else
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cmd_xct(CR);
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cmd_xct(TAB);
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#endif /*-IMAGEN*/
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}
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#endif /*FX_INDNL*/
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#if FX_BACKIND
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/* EFUN: "Back to Indentation"
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** Moves to end of current line's indentation.
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*/
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f_backind()
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{ e_gobol(); /* First move to beg of line */
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e_gofwsp(); /* Then forward over whitespace */
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ed_setcur();
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}
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#endif /*FX_BACKIND*/
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#if FX_INDCOMM
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static char *comm_beg = "/* ";
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static char *comm_end = " */";
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/* EFUN: "Indent for Comment" */
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f_indcomm()
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{
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f_endline();
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if(indtion(cur_dot) < ev_ccolumn)
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ed_indto(ev_ccolumn);
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else ed_sins(" ");
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ed_sins (comm_beg);
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ed_sins (comm_end);
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e_igoff(-strlen (comm_end)); /* back over end string */
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e_setcur();
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}
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#endif /*FX_INDCOMM*/
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#if FX_INDREL
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/* EFUN: "Indent Relative" */
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/* This used to mistakenly be called Indent Under.
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** Still not fully implemented.
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** If at beginning of line, looks back at previous indented line,
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** and indents this line that much. If there is no preceding indented
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** line or not at beginning of line, insert a tab.
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*/
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f_indrel()
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{ register int c;
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register n;
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#if IMAGEN
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chroff savdot;
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#endif /*IMAGEN*/
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#if ICONOGRAPHICS
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chroff savdot;
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int curind, newind, morebuf;
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#endif /*ICONOGRAPHICS*/
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if((c = e_rgetc()) == EOF)
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#if IMAGEN
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return(f_insself(TAB)); /* Do mode-based tabbing */
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#else
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return(ed_insert(TAB));
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#endif /*-IMAGEN*/
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if(c == LF)
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{ e_gobol();
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e_gofwsp();
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n = d_curind();
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e_gonl(); /* Return to orig pos */
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if(n)
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{ ed_indto(n);
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#if IMAGEN
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savdot = e_dot();
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e_gofwsp();
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ed_delete(savdot, e_dot());
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#endif /*IMAGEN*/
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return;
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}
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}
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#if ICONOGRAPHICS
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else
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{ e_igoff (1);
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curind = indtion (savdot = e_dot ());
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/* get current dot and indentation */
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while (1) /* find a prev line that extends rightward */
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{ morebuf = e_gopl ();
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e_goeol ();
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if ((newind = d_curind()) > curind) break;
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if (morebuf == 0) /* hit beginning of buffer */
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{ e_go (savdot);
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f_delspc();
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return (1);
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}
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}
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e_gobol ();
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e_igoff (inindex (e_dot (), curind));
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if (d_curind() > curind)
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e_rgetc (); /* pushed ahead by tab */
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while (c_wsp (e_getc ()) == 0) ;
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e_backc ();
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e_fwsp ();
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newind = d_curind();
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e_go (savdot);
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f_delspc();
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ed_indto (newind);
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}
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#else
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else e_getc();
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#if IMAGEN
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f_insself(TAB); /* Do mode-based tabbing */
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#else
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ed_insert(TAB);
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#endif /*-IMAGEN*/
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#endif /*-ICONOGRAPHICS*/
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}
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#endif /*FX_INDREL*/
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/* Paren matching stuff. Note that this stuff will be very painful unless
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** tinwait() works properly.
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*/
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#if 0
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/* EFUN: "Self-Insert and Match" (intended to be bound to brackets) */
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/* (KLH: Evidently this was never finished)
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*/
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insertmatch(c)
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register int c;
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{
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}
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#endif
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/* Should change this to Matching Paren */
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#if FX_MATCHBRACK
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/* EFUN: "Match Bracket" (not EMACS) - from IMAGEN config
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* Show the matching bracket for the character right before dot
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*/
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f_matchbrack()
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{
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chroff savdot;
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register int i, mc, secs;
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if (exp_p)
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secs = exp;
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else
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secs = 1;
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savdot = cur_dot; /* Save our location */
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mc = e_rgetc(); /* Pick up character before dot */
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if (mc != ')' && mc != ']' && mc != '}')
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{ e_getc(); /* Nothing, try at dot instead */
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e_getc();
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mc = e_rgetc();
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if (mc != ')' && mc != ']' && mc != '}')
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{ ding("What bracket?");
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e_go(savdot);
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return;
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}
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}
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if (! matchonelevel(mc))
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ring_bell();
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else
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{ ed_setcur();
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if (d_line(cur_dot) < 0)
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secs = 10; /* Wait longer if off-screen */
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redisplay(); /* Wish it were simple upd_wind() */
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for (i = 1; i <= secs; ++i)
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{ if (tinwait())
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break;
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sleep(1);
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}
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}
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e_gosetcur(savdot); /* Back to origin */
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redp(RD_MOVE); /* Cursor has moved */
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}
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/* Try to match 'mc', return true iff found it */
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matchonelevel(mc)
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register int mc;
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{
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register int c;
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while ((c = e_rgetc()) != EOF)
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{ if (c == /*[*/ ']' || c == /*(*/ ')' || c == /*{*/ '}')
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{ if (! matchonelevel(c))
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break;
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}
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else if (c == '(' /*)*/)
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return(mc == /*(*/ ')');
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else if (c == '[' /*]*/)
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return(mc == /*[*/ ']');
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else if (c == '{' /*}*/)
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return(mc == /*{*/ '}');
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}
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return(0);
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}
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#endif /*FX_MATCHBRACK*/
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