ex_screen.c

早期freebsd实现

/*-
 * Copyright (c) 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
static char sccsid[] = "@(#)ex_screen.c	8.12 (Berkeley) 3/8/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <bitstring.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>

#include "compat.h"
#include <db.h>
#include <regex.h>

#include "vi.h"
#include "excmd.h"

/*
 * ex_split --	:s[plit] [file ...]
 *	Split the screen, optionally setting the file list.
 */
int
ex_split(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	return (sp->s_split(sp, cmdp->argc ? cmdp->argv : NULL));
}

/*
 * ex_bg --	:bg
 *	Hide the screen.
 */
int
ex_bg(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	return (sp->s_bg(sp));
}

/*
 * ex_fg --	:fg [file]
 *	Show the screen.
 */
int
ex_fg(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	return (sp->s_fg(sp, cmdp->argc ? cmdp->argv[0]->bp : NULL));
}

/*
 * ex_resize --	:resize [+-]rows
 *	Change the screen size.
 */
int
ex_resize(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	enum adjust adj;

	if (!F_ISSET(cmdp, E_COUNT)) {
		msgq(sp, M_ERR, "Usage: %s", cmdp->cmd->usage);
		return (1);
	}
	if (F_ISSET(cmdp, E_COUNT_NEG))
		adj = A_DECREASE;
	else if (F_ISSET(cmdp, E_COUNT_POS))
		adj = A_INCREASE;
	else
		adj = A_SET;
	return (sp->s_rabs(sp, cmdp->count, adj));
}

/*
 * ex_sdisplay --
 *	Display the list of screens.
 */
int
ex_sdisplay(sp, ep)
	SCR *sp;
	EXF *ep;
{
	SCR *tsp;
	int cnt, col, len, sep;

	if ((tsp = sp->gp->hq.cqh_first) == (void *)&sp->gp->hq) {
		(void)ex_printf(EXCOOKIE,
		    "No backgrounded screens to display.\n");
		return (0);
	}

	col = len = sep = 0;
	for (cnt = 1; tsp != (void *)&sp->gp->hq; tsp = tsp->q.cqe_next) {
		col += len = strlen(FILENAME(tsp->frp)) + sep;
		if (col >= sp->cols - 1) {
			col = len;
			sep = 0;
			(void)ex_printf(EXCOOKIE, "\n");
		} else if (cnt != 1) {
			sep = 1;
			(void)ex_printf(EXCOOKIE, " ");
		}
		(void)ex_printf(EXCOOKIE, "%s", FILENAME(tsp->frp));
		++cnt;
	}
	(void)ex_printf(EXCOOKIE, "\n");
	return (0);
}