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126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)wwdelchar.c 8.1 (Berkeley) 6/6/93";
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static char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include "ww.h"
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#include "tt.h"
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wwdelchar(w, row, col)
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register struct ww *w;
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{
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register i;
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int nvis;
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/*
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* First, shift the line.
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*/
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{
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register union ww_char *p, *q;
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p = &w->ww_buf[row][col];
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q = p + 1;
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for (i = w->ww_b.r - col; --i > 0;)
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*p++ = *q++;
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p->c_w = ' ';
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}
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/*
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* If can't see it, just return.
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*/
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if (row < w->ww_i.t || row >= w->ww_i.b
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|| w->ww_i.r <= 0 || w->ww_i.r <= col)
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return;
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if (col < w->ww_i.l)
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col = w->ww_i.l;
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/*
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* Now find out how much is actually changed, and fix wwns.
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*/
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{
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register union ww_char *buf;
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register char *win;
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register union ww_char *ns;
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register char *smap;
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char touched;
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nvis = 0;
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smap = &wwsmap[row][col];
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for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
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;
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if (i >= w->ww_i.r)
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return;
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col = i;
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buf = w->ww_buf[row];
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win = w->ww_win[row];
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ns = wwns[row];
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smap = &wwsmap[row][i];
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touched = wwtouched[row];
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for (; i < w->ww_i.r; i++) {
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if (*smap++ != w->ww_index)
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continue;
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touched |= WWU_TOUCHED;
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if (win[i])
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ns[i].c_w =
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buf[i].c_w ^ win[i] << WWC_MSHIFT;
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else {
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nvis++;
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ns[i] = buf[i];
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}
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}
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wwtouched[row] = touched;
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}
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/*
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* Can/Should we use delete character?
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*/
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if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
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register union ww_char *p, *q;
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xxdelchar(row, col);
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p = &wwos[row][col];
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q = p + 1;
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for (i = wwncol - col; --i > 0;)
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*p++ = *q++;
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p->c_w = ' ';
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}
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}
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