[dragonfly.git] / usr.bin / window / wwinschar.c

/*	@(#)wwinschar.c	8.1 (Berkeley) 6/6/93	*/
/*	$NetBSD: wwinschar.c,v 1.7 2003/08/07 11:17:40 agc Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "ww.h"
#include "tt.h"
#include "xx.h"

void
wwinschar(struct ww *w, int row, int col, char c, char m)
{
	int i;
	int nvis;
	short x = c | m << WWC_MSHIFT;

	/*
	 * First, shift the line.
	 */
	{
		union ww_char *p, *q;

		p = &w->ww_buf[row][w->ww_b.r];
		q = p - 1;
		for (i = w->ww_b.r - col; --i > 0;)
			*--p = *--q;
		q->c_w = x;
	}

	/*
	 * If can't see it, just return.
	 */
	if (row < w->ww_i.t || row >= w->ww_i.b
	    || w->ww_i.r <= 0 || w->ww_i.r <= col)
		return;

	if (col < w->ww_i.l)
		col = w->ww_i.l;

	/*
	 * Now find out how much is actually changed, and fix wwns.
	 */
	{
		union ww_char *buf;
		char *win;
		union ww_char *ns;
		unsigned char *smap;
		char touched;

		nvis = 0;
		smap = &wwsmap[row][col];
		for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
			;
		if (i >= w->ww_i.r)
			return;
		col = i;
		buf = w->ww_buf[row];
		win = w->ww_win[row];
		ns = wwns[row];
		smap = &wwsmap[row][i];
		touched = wwtouched[row];
		for (; i < w->ww_i.r; i++) {
			if (*smap++ != w->ww_index)
				continue;
			touched |= WWU_TOUCHED;
			if (win[i])
				ns[i].c_w =
					buf[i].c_w ^ win[i] << WWC_MSHIFT;
			else {
				nvis++;
				ns[i] = buf[i];
			}
		}
		wwtouched[row] = touched;
	}

	/*
	 * Can/Should we use delete character?
	 */
	if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) {
		union ww_char *p, *q;

		if (tt.tt_inschar)
			xxinschar(row, col, c, m);
		else {
			xxinsspace(row, col);
			x = ' ';
		}
		p = &wwos[row][wwncol];
		q = p - 1;
		for (i = wwncol - col; --i > 0;)
			*--p = *--q;
		q->c_w = x;
	}
}
Commit	Line	Data
2c872e05	1	/* @(#)wwinschar.c 8.1 (Berkeley) 6/6/93 */
abecab39 SW	2	/* $NetBSD: wwinschar.c,v 1.7 2003/08/07 11:17:40 agc Exp $ */
abecab39 SW	3
984263bc MD	4	/*
	5	* Copyright (c) 1983, 1993
	6	* The Regents of the University of California. All rights reserved.
	7	*
	8	* This code is derived from software contributed to Berkeley by
	9	* Edward Wang at The University of California, Berkeley.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions and the following disclaimer.
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in the
	18	* documentation and/or other materials provided with the distribution.
abecab39	19	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
984263bc MD	36	#include "ww.h"
984263bc MD	37	#include "tt.h"
abecab39	38	#include "xx.h"
984263bc	39
abecab39 SW	40	void
abecab39 SW	41	wwinschar(struct ww *w, int row, int col, char c, char m)
984263bc	42	{
abecab39	43	int i;
984263bc MD	44	int nvis;
	45	short x = c \| m << WWC_MSHIFT;
	46
	47	/*
	48	* First, shift the line.
	49	*/
	50	{
abecab39	51	union ww_char p, q;
984263bc MD	52
	53	p = &w->ww_buf[row][w->ww_b.r];
	54	q = p - 1;
	55	for (i = w->ww_b.r - col; --i > 0;)
	56	--p = --q;
	57	q->c_w = x;
	58	}
	59
	60	/*
	61	* If can't see it, just return.
	62	*/
	63	if (row < w->ww_i.t \|\| row >= w->ww_i.b
	64	\|\| w->ww_i.r <= 0 \|\| w->ww_i.r <= col)
	65	return;
	66
	67	if (col < w->ww_i.l)
	68	col = w->ww_i.l;
	69
	70	/*
	71	* Now find out how much is actually changed, and fix wwns.
	72	*/
	73	{
abecab39 SW	74	union ww_char *buf;
	75	char *win;
	76	union ww_char *ns;
	77	unsigned char *smap;
984263bc MD	78	char touched;
	79
	80	nvis = 0;
	81	smap = &wwsmap[row][col];
	82	for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
	83	;
	84	if (i >= w->ww_i.r)
	85	return;
	86	col = i;
	87	buf = w->ww_buf[row];
	88	win = w->ww_win[row];
	89	ns = wwns[row];
	90	smap = &wwsmap[row][i];
	91	touched = wwtouched[row];
	92	for (; i < w->ww_i.r; i++) {
	93	if (*smap++ != w->ww_index)
	94	continue;
	95	touched \|= WWU_TOUCHED;
	96	if (win[i])
	97	ns[i].c_w =
	98	buf[i].c_w ^ win[i] << WWC_MSHIFT;
	99	else {
	100	nvis++;
	101	ns[i] = buf[i];
	102	}
	103	}
	104	wwtouched[row] = touched;
	105	}
	106
	107	/*
	108	* Can/Should we use delete character?
	109	*/
	110	if ((tt.tt_inschar \|\| tt.tt_insspace) && nvis > (wwncol - col) / 2) {
abecab39	111	union ww_char p, q;
984263bc MD	112
	113	if (tt.tt_inschar)
	114	xxinschar(row, col, c, m);
	115	else {
	116	xxinsspace(row, col);
	117	x = ' ';
	118	}
	119	p = &wwos[row][wwncol];
	120	q = p - 1;
	121	for (i = wwncol - col; --i > 0;)
	122	--p = --q;
	123	q->c_w = x;
	124	}
	125	}