-c flag, incmd, setcmd(), setterse() added

[unix-history] / usr / src / usr.bin / window / win.c

#ifndef lint
static	char *sccsid = "@(#)win.c	3.4 84/03/29";
#endif

#include "defs.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 stacked in overlapping order and divided into
 * three groups: foreground, normal, and background.  Information
 * windows are always foreground.  User windows can be anywhere.
 * Addwin() adds a window to one of the three groups.
 * Deletewin() deletes a window.  Front() moves a window to the front
 * of its group.  Wwadd() and wwdelete() should never be called
 * directly.
 */

/*
 * Open a user window.
 */
struct ww *
openwin(id, row, col, nrow, ncol, nline, label)
char *label;
{
	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;
	}
	if ((w = wwopen(WWO_PTY, nrow, ncol, row, col, nline)) == 0) {
		error("%s.", wwerror());
		return 0;
	}
	w->ww_id = id;
	window[id] = w;
	w->ww_hasframe = 1;
	w->ww_altpos.r = 1;
	w->ww_altpos.c = 0;
	if (label != 0 && setlabel(w, label) < 0)
		error("No memory for label.");
	wwcursor(w, 1);
	addwin(w, 1);
	selwin = w;
	reframe();
	wwupdate();
	wwflush();
	if (wwspawn(w, shell, shellname, (char *)0) < 0) {
		c_close(w);
		error("%s: %s.", shell, wwerror());
		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_id = -1;
	w->ww_center = 1;
	(void) setlabel(w, label);
	addwin(w, 0);
	reframe();
	wwupdate();
	return w;
}

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

/*
 * Set the current window.
 */
setselwin(w)
struct ww *w;
{
	if (selwin == w)
		return;
	lastselwin = selwin;
	front(selwin = w, 1);
}

/*
 * 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 (isfg(w)) {
		if (w->ww_back != framewin && !wwvisible(w)) {
			deletewin(w);
			addwin(w, 0);
			doreframe = 1;
		}
	} else if (isbg(w)) {
		if (w != bgwin && !wwvisible(w)) {
			deletewin(w);
			addwin(w, 3);
			doreframe = 1;
		}
	} else {
		if (w->ww_back != fgwin && !wwvisible(w)) {
			deletewin(w);
			addwin(w, 1);
			doreframe = 1;
		}
	}
	if (doreframe)
		reframe();
}

/*
 * Add a window at one of four places.
 */
addwin(w, where)
register struct ww *w;
{
	switch (where) {
	case 0:		/* top of foreground windows */
		wwadd(w, framewin);
		if (fgwin == framewin)
			fgwin = w;
		break;
	case 1:		/* top of normal windows */
		wwadd(w, fgwin);
		break;
	case 2:		/* bottom of normal windows */
		wwadd(w, bgwin->ww_back);
		break;
	case 3:		/* top of background windows */
		wwadd(w, bgwin->ww_back);
		bgwin = w;
		break;
	}
}

/*
 * Delete a window.
 */
deletewin(w)
register struct ww *w;
{
	if (isfg(w)) {
		if (fgwin == w)
			fgwin = w->ww_back;
	} else if (isbg(w)) {
		if (bgwin == w)
			bgwin = w->ww_forw;
	}
	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);
	}
}

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

more(w, always)
register struct ww *w;
char always;
{
	int c;

	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]");
	wwputs("\033E", w);
	return c == CTRL([) ? 2 : 1;
}

waitnl1(w, prompt)
register struct ww *w;
char *prompt;
{
	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();
	return wwgetc();
}