/*      $OpenBSD: ex_screen.c,v 1.10 2016/01/06 22:28:52 millert Exp $  */

/*-
 * Copyright (c) 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1993, 1994, 1995, 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

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

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

#include "../common/common.h"
#include "../vi/vi.h"

/*
 * ex_bg --     :bg
 *      Hide the screen.
 *
 * PUBLIC: int ex_bg(SCR *, EXCMD *);
 */
int
ex_bg(SCR *sp, EXCMD *cmdp)
{
        return (vs_bg(sp));
}

/*
 * ex_fg --     :fg [file]
 *      Show the screen.
 *
 * PUBLIC: int ex_fg(SCR *, EXCMD *);
 */
int
ex_fg(SCR *sp, EXCMD *cmdp)
{
        SCR *nsp;
        int newscreen;

        newscreen = F_ISSET(cmdp, E_NEWSCREEN);
        if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
                return (1);

        /* Set up the switch. */
        if (newscreen) {
                sp->nextdisp = nsp;
                F_SET(sp, SC_SSWITCH);
        }
        return (0);
}

/*
 * ex_resize -- :resize [+-]rows
 *      Change the screen size.
 *
 * PUBLIC: int ex_resize(SCR *, EXCMD *);
 */
int
ex_resize(SCR *sp, EXCMD *cmdp)
{
        adj_t adj;

        switch (FL_ISSET(cmdp->iflags,
            E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
        case E_C_COUNT:
                adj = A_SET;
                break;
        case E_C_COUNT | E_C_COUNT_NEG:
                adj = A_DECREASE;
                break;
        case E_C_COUNT | E_C_COUNT_POS:
                adj = A_INCREASE;
                break;
        default:
                ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
                return (1);
        }
        return (vs_resize(sp, cmdp->count, adj));
}

/*
 * ex_sdisplay --
 *      Display the list of screens.
 *
 * PUBLIC: int ex_sdisplay(SCR *);
 */
int
ex_sdisplay(SCR *sp)
{
        GS *gp;
        SCR *tsp;
        int cnt, col, len, sep;

        gp = sp->gp;
        if (TAILQ_EMPTY(&gp->hq)) {
                msgq(sp, M_INFO, "No background screens to display");
                return (0);
        }

        col = len = sep = 0;
        cnt = 1;
        TAILQ_FOREACH(tsp, &gp->hq, q) {
                if (INTERRUPTED(sp))
                        break;
                col += len = strlen(tsp->frp->name) + sep;
                if (col >= sp->cols - 1) {
                        col = len;
                        sep = 0;
                        (void)ex_puts(sp, "\n");
                } else if (cnt != 1) {
                        sep = 1;
                        (void)ex_puts(sp, " ");
                }
                (void)ex_puts(sp, tsp->frp->name);
                ++cnt;
        }
        if (!INTERRUPTED(sp))
                (void)ex_puts(sp, "\n");
        return (0);
}