usr/src/ucb/window/win.c

#ifndef lint
static char sccsid[] = "@(#)win.c       3.14 4/24/85";
#endif

/*
 * Copyright (c) 1983 Regents of the University of California,
 * All rights reserved.  Redistribution permitted subject to
 * the terms of the Berkeley Software License Agreement.
 */

#include "defs.h"
#include "char.h"

/*
 * Higher level routines for dealing with windows.
 *
 * There are two types of windows: user window, and information window.
 * User windows are the ones with a pty and shell.  Information windows
 * are for displaying error messages, and other information.
 *
 * The windows are doubly linked in overlapping order and divided into
 * two groups: foreground and normal.  Information
 * windows are always foreground.  User windows can be either.
 * Addwin() adds a window to the list at the top of one of the two groups.
 * Deletewin() deletes a window.  Front() moves a window to the front
 * of its group.  Wwopen(), wwadd(), and wwdelete() should never be called
 * directly.
 */

/*
 * Open a user window.
 */
struct ww *
openwin(id, row, col, nrow, ncol, nline, label, haspty, hasframe, shf, sh)
char *label;
char haspty, hasframe;
char *shf, **sh;
{
        register struct ww *w;

        if (id < 0 && (id = findid()) < 0)
                return 0;
        if (row + nrow <= 0 || row > wwnrow - 1
            || col + ncol <= 0 || col > wwncol - 1) {
                error("Illegal window position.");
                return 0;
        }
        w = wwopen(haspty ? WWO_PTY : WWO_SOCKET, nrow, ncol, row, col, nline);
        if (w == 0) {
                error("Can't open window: %s.", wwerror());
                return 0;
        }
        w->ww_id = id;
        window[id] = w;
        w->ww_hasframe = hasframe;
        w->ww_alt = w->ww_w;
        if (label != 0 && setlabel(w, label) < 0)
                error("No memory for label.");
        wwcursor(w, 1);
        /*
         * We have to do this little maneuver to make sure
         * addwin() puts w at the top, so we don't waste an
         * insert and delete operation.
         */
        setselwin((struct ww *)0);
        addwin(w, 0);
        setselwin(w);
        wwupdate();
        wwflush();
        if (wwspawn(w, shf, sh) < 0) {
                error("Can't execute %s: %s.", shf, wwerror());
                c_close(w);
                return 0;
        }
        return w;
}

findid()
{
        register i;

        for (i = 0; i < NWINDOW && window[i] != 0; i++)
                ;
        if (i >= NWINDOW) {
                error("Too many windows.");
                return -1;
        }
        return i;
}

/*
 * Close a user window.
 * May leave selwin == 0.
 */
closewin(w)
register struct ww *w;
{
        if (w == selwin)
                selwin = 0;
        if (w == lastselwin)
                lastselwin = 0;
        if (w->ww_id >= 0 && w->ww_id < NWINDOW)
                window[w->ww_id] = 0;
        if (w->ww_label)
                str_free(w->ww_label);
        deletewin(w);
        wwclose(w);
}

/*
 * Open an information (display) window.
 */
struct ww *
openiwin(nrow, label)
char *label;
{
        register struct ww *w;

        if ((w = wwopen(0, nrow, wwncol, 2, 0, 0)) == 0)
                return 0;
        w->ww_mapnl = 1;
        w->ww_hasframe = 1;
        w->ww_nointr = 1;
        w->ww_noupdate = 1;
        w->ww_unctrl = 1;
        w->ww_id = -1;
        w->ww_center = 1;
        (void) setlabel(w, label);
        addwin(w, 1);
        reframe();
        wwupdate();
        return w;
}

/*
 * Close an information window.
 */
closeiwin(w)
struct ww *w;
{
        closewin(w);
        reframe();
}

/*
 * Move the window to the top of its group.
 * Don't do it if already fully visible.
 * Wwvisible() doesn't work for tinted windows.
 * But anything to make it faster.
 * Always reframe() if doreframe is true.
 */
front(w, doreframe)
register struct ww *w;
char doreframe;
{
        if (w->ww_back != (isfg(w) ? framewin : fgwin) && !wwvisible(w)) {
                deletewin(w);
                addwin(w, isfg(w));
                doreframe = 1;
        }
        if (doreframe)
                reframe();
}

/*
 * Add a window at the top of normal windows or foreground windows.
 * For normal windows, we put it behind the current window.
 */
addwin(w, fg)
register struct ww *w;
char fg;
{
        if (fg) {
                wwadd(w, framewin);
                if (fgwin == framewin)
                        fgwin = w;
        } else
                wwadd(w, selwin != 0 && selwin != w && !isfg(selwin)
                                ? selwin : fgwin);
}

/*
 * Delete a window.
 */
deletewin(w)
register struct ww *w;
{
        if (fgwin == w)
                fgwin = w->ww_back;
        wwdelete(w);
}

reframe()
{
        register struct ww *w;

        wwunframe(framewin);
        for (w = wwhead.ww_back; w != &wwhead; w = w->ww_back)
                if (w->ww_hasframe) {
                        wwframe(w, framewin);
                        labelwin(w);
                }
}

labelwin(w)
register struct ww *w;
{
        int mode = w == selwin ? WWM_REV : 0;

        if (!w->ww_hasframe)
                return;
        if (w->ww_id >= 0) {
                char buf[2];

                buf[0] = w->ww_id + '1';
                buf[1] = 0;
                wwlabel(w, framewin, 1, buf, mode);
        }
        if (w->ww_label) {
                int col;

                if (w->ww_center) {
                        col = (w->ww_w.nc - strlen(w->ww_label)) / 2;
                        col = MAX(3, col);
                } else
                        col = 3;
                wwlabel(w, framewin, col, w->ww_label, mode);
        }
}

stopwin(w)
        register struct ww *w;
{
        w->ww_stopped = 1;
        if (w->ww_pty >= 0 && w->ww_ispty)
                (void) ioctl(w->ww_pty, (int)TIOCSTOP, (char *)0);
}

startwin(w)
        register struct ww *w;
{
        w->ww_stopped = 0;
        if (w->ww_pty >= 0 && w->ww_ispty)
                (void) ioctl(w->ww_pty, (int)TIOCSTART, (char *)0);
}

sizewin(w, nrow, ncol)
register struct ww *w;
{
        struct ww *back = w->ww_back;

        w->ww_alt.nr = w->ww_w.nr;
        w->ww_alt.nc = w->ww_w.nc;
        wwdelete(w);
        if (wwsize(w, nrow, ncol) < 0)
                error("Can't resize window: %s.", wwerror());
        wwadd(w, back);
        reframe();
}

waitnl(w)
struct ww *w;
{
        (void) waitnl1(w, "[Type any key to continue]");
}

more(w, always)
register struct ww *w;
char always;
{
        int c;
        char uc = w->ww_unctrl;

        if (!always && w->ww_cur.r < w->ww_w.b - 2)
                return 0;
        c = waitnl1(w, "[Type escape to abort, any other key to continue]");
        w->ww_unctrl = 0;
        wwputs("\033E", w);
        w->ww_unctrl = uc;
        return c == ctrl([) ? 2 : 1;
}

waitnl1(w, prompt)
register struct ww *w;
char *prompt;
{
        char uc = w->ww_unctrl;

        w->ww_unctrl = 0;
        front(w, 0);
        wwprintf(w, "\033Y%c%c\033p%s\033q ",
                w->ww_w.nr - 1 + ' ', ' ', prompt);     /* print on last line */
        wwcurtowin(w);
        while (wwpeekc() < 0)
                wwiomux();
        w->ww_unctrl = uc;
        return wwgetc();
}