garbeam@0: /*
garbeam@0:  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
garbeam@0:  * See LICENSE file for license details.
garbeam@0:  */
garbeam@0: 
garbeam@14: #include <errno.h>
garbeam@14: 
garbeam@0: #include <stdarg.h>
garbeam@0: #include <stdio.h>
garbeam@0: #include <stdlib.h>
garbeam@0: 
garbeam@14: #include <sys/types.h>
garbeam@14: #include <sys/time.h>
garbeam@14: 
garbeam@0: #include <X11/cursorfont.h>
garbeam@0: #include <X11/Xatom.h>
garbeam@0: #include <X11/Xproto.h>
garbeam@0: 
garbeam@0: #include "wm.h"
garbeam@0: 
garbeam@3: /* X structs */
garbeam@0: Display *dpy;
garbeam@5: Window root, barwin;
garbeam@13: Atom wm_atom[WMLast], net_atom[NetLast];
garbeam@0: Cursor cursor[CurLast];
garbeam@5: XRectangle rect, barrect;
garbeam@5: Bool running = True;
garbeam@13: Bool sel_screen;
garbeam@3: 
garbeam@7: char *bartext, tag[256];
garbeam@13: int screen;
garbeam@3: 
garbeam@3: Brush brush = {0};
garbeam@10: Client *clients = NULL;
garbeam@13: Client *stack = NULL;
garbeam@0: 
garbeam@0: static Bool other_wm_running;
garbeam@10: static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
garbeam@0: static int (*x_error_handler) (Display *, XErrorEvent *);
garbeam@0: 
garbeam@0: static void
garbeam@0: usage()
garbeam@0: {
garbeam@0: 	fputs("usage: gridwm [-v]\n", stderr);
garbeam@0: 	exit(1);
garbeam@0: }
garbeam@0: 
garbeam@0: static void
garbeam@0: scan_wins()
garbeam@0: {
garbeam@0: 	unsigned int i, num;
garbeam@0: 	Window *wins;
garbeam@0: 	XWindowAttributes wa;
garbeam@0: 	Window d1, d2;
garbeam@0: 
garbeam@0: 	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
garbeam@0: 		for(i = 0; i < num; i++) {
garbeam@0: 			if(!XGetWindowAttributes(dpy, wins[i], &wa))
garbeam@0: 				continue;
garbeam@0: 			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
garbeam@0: 				continue;
garbeam@0: 			if(wa.map_state == IsViewable)
garbeam@10: 				manage(wins[i], &wa);
garbeam@0: 		}
garbeam@0: 	}
garbeam@0: 	if(wins)
garbeam@0: 		XFree(wins);
garbeam@0: }
garbeam@0: 
garbeam@13: static int
garbeam@13: win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
garbeam@13: {
garbeam@13: 	Atom real;
garbeam@13: 	int format;
garbeam@13: 	unsigned long res, extra;
garbeam@13: 	int status;
garbeam@13: 
garbeam@13: 	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
garbeam@13: 			&res, &extra, prop);
garbeam@13: 
garbeam@13: 	if(status != Success || *prop == 0) {
garbeam@13: 		return 0;
garbeam@13: 	}
garbeam@13: 	if(res == 0) {
garbeam@13: 		free((void *) *prop);
garbeam@13: 	}
garbeam@13: 	return res;
garbeam@13: }
garbeam@13: 
garbeam@13: int
garbeam@13: win_proto(Window w)
garbeam@13: {
garbeam@13: 	Atom *protocols;
garbeam@13: 	long res;
garbeam@13: 	int protos = 0;
garbeam@13: 	int i;
garbeam@13: 
garbeam@13: 	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
garbeam@13: 			((unsigned char **) &protocols));
garbeam@13: 	if(res <= 0) {
garbeam@13: 		return protos;
garbeam@13: 	}
garbeam@13: 	for(i = 0; i < res; i++) {
garbeam@13: 		if(protocols[i] == wm_atom[WMDelete])
garbeam@13: 			protos |= WM_PROTOCOL_DELWIN;
garbeam@13: 	}
garbeam@13: 	free((char *) protocols);
garbeam@13: 	return protos;
garbeam@13: }
garbeam@13: 
garbeam@13: void
garbeam@13: send_message(Window w, Atom a, long value)
garbeam@13: {
garbeam@13: 	XEvent e;
garbeam@13: 
garbeam@13: 	e.type = ClientMessage;
garbeam@13: 	e.xclient.window = w;
garbeam@13: 	e.xclient.message_type = a;
garbeam@13: 	e.xclient.format = 32;
garbeam@13: 	e.xclient.data.l[0] = value;
garbeam@13: 	e.xclient.data.l[1] = CurrentTime;
garbeam@13: 	XSendEvent(dpy, w, False, NoEventMask, &e);
garbeam@13: 	XFlush(dpy);
garbeam@13: }
garbeam@13: 
garbeam@0: /*
garbeam@0:  * There's no way to check accesses to destroyed windows, thus
garbeam@0:  * those cases are ignored (especially on UnmapNotify's).
garbeam@0:  * Other types of errors call Xlib's default error handler, which
garbeam@0:  * calls exit().
garbeam@0:  */
garbeam@10: int
garbeam@0: error_handler(Display *dpy, XErrorEvent *error)
garbeam@0: {
garbeam@0: 	if(error->error_code == BadWindow
garbeam@0: 			|| (error->request_code == X_SetInputFocus
garbeam@0: 				&& error->error_code == BadMatch)
garbeam@0: 			|| (error->request_code == X_PolyText8
garbeam@0: 				&& error->error_code == BadDrawable)
garbeam@0: 			|| (error->request_code == X_PolyFillRectangle
garbeam@0: 				&& error->error_code == BadDrawable)
garbeam@0: 			|| (error->request_code == X_PolySegment
garbeam@0: 				&& error->error_code == BadDrawable)
garbeam@0: 			|| (error->request_code == X_ConfigureWindow
garbeam@0: 				&& error->error_code == BadMatch)
garbeam@0: 			|| (error->request_code == X_GrabKey
garbeam@0: 				&& error->error_code == BadAccess))
garbeam@0: 		return 0;
garbeam@0: 	fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
garbeam@0: 			error->request_code, error->error_code);
garbeam@0: 	return x_error_handler(dpy, error); /* may call exit() */
garbeam@0: }
garbeam@0: 
garbeam@0: /*
garbeam@0:  * Startup Error handler to check if another window manager
garbeam@0:  * is already running.
garbeam@0:  */
garbeam@0: static int
garbeam@0: startup_error_handler(Display *dpy, XErrorEvent *error)
garbeam@0: {
garbeam@0: 	other_wm_running = True;
garbeam@0: 	return -1;
garbeam@0: }
garbeam@0: 
garbeam@0: static void
garbeam@0: cleanup()
garbeam@0: {
garbeam@14: 	while(clients)
garbeam@14: 		unmanage(clients);
garbeam@0: 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
garbeam@0: }
garbeam@0: 
garbeam@0: int
garbeam@0: main(int argc, char *argv[])
garbeam@0: {
garbeam@0: 	int i;
garbeam@0: 	XSetWindowAttributes wa;
garbeam@0: 	unsigned int mask;
garbeam@0: 	Window w;
garbeam@5: 	XEvent ev;
garbeam@14: 	fd_set fds;
garbeam@14: 	struct timeval t, timeout = {
garbeam@14: 		.tv_usec = 0,
garbeam@14: 		.tv_sec = STATUSDELAY,
garbeam@14: 	};
garbeam@0: 
garbeam@0: 	/* command line args */
garbeam@0: 	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
garbeam@0: 		switch (argv[i][1]) {
garbeam@0: 		case 'v':
garbeam@0: 			fprintf(stdout, "%s", version);
garbeam@0: 			exit(0);
garbeam@0: 			break;
garbeam@0: 		default:
garbeam@0: 			usage();
garbeam@0: 			break;
garbeam@0: 		}
garbeam@0: 	}
garbeam@0: 
garbeam@0: 	dpy = XOpenDisplay(0);
garbeam@0: 	if(!dpy)
garbeam@0: 		error("gridwm: cannot connect X server\n");
garbeam@0: 
garbeam@0: 	screen = DefaultScreen(dpy);
garbeam@0: 	root = RootWindow(dpy, screen);
garbeam@0: 
garbeam@0: 	/* check if another WM is already running */
garbeam@0: 	other_wm_running = False;
garbeam@0: 	XSetErrorHandler(startup_error_handler);
garbeam@0: 	/* this causes an error if some other WM is running */
garbeam@0: 	XSelectInput(dpy, root, SubstructureRedirectMask);
garbeam@3: 	XFlush(dpy);
garbeam@0: 
garbeam@0: 	if(other_wm_running)
garbeam@0: 		error("gridwm: another window manager is already running\n");
garbeam@0: 
garbeam@0: 	rect.x = rect.y = 0;
garbeam@0: 	rect.width = DisplayWidth(dpy, screen);
garbeam@0: 	rect.height = DisplayHeight(dpy, screen);
garbeam@0: 	sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
garbeam@0: 
garbeam@0: 	XSetErrorHandler(0);
garbeam@0: 	x_error_handler = XSetErrorHandler(error_handler);
garbeam@0: 
garbeam@0: 	/* init atoms */
garbeam@13: 	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
garbeam@13: 	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
garbeam@0: 	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
garbeam@0: 	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
garbeam@0: 
garbeam@0: 	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
garbeam@0: 			PropModeReplace, (unsigned char *) net_atom, NetLast);
garbeam@0: 
garbeam@0: 
garbeam@0: 	/* init cursors */
garbeam@0: 	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
garbeam@0: 	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
garbeam@0: 	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
garbeam@0: 
garbeam@8: 	update_keys();
garbeam@0: 
garbeam@5: 	brush.drawable = XCreatePixmap(dpy, root, rect.width, rect.height,
garbeam@0: 			DefaultDepth(dpy, screen));
garbeam@5: 	brush.gc = XCreateGC(dpy, root, 0, 0);
garbeam@5: 
garbeam@5: 	/* style */
garbeam@5: 	loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
garbeam@5: 	loadfont(dpy, &brush.font, FONT);
garbeam@5: 
garbeam@5: 	wa.override_redirect = 1;
garbeam@5: 	wa.background_pixmap = ParentRelative;
garbeam@5: 	wa.event_mask = ExposureMask;
garbeam@5: 
garbeam@5: 	barrect = rect;
garbeam@5: 	barrect.height = labelheight(&brush.font);
garbeam@5: 	barrect.y = rect.height - barrect.height;
garbeam@5: 	barwin = XCreateWindow(dpy, root, barrect.x, barrect.y,
garbeam@5: 			barrect.width, barrect.height, 0, DefaultDepth(dpy, screen),
garbeam@5: 			CopyFromParent, DefaultVisual(dpy, screen),
garbeam@5: 			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
garbeam@7: 	bartext = NULL;
garbeam@5: 	XDefineCursor(dpy, barwin, cursor[CurNormal]);
garbeam@5: 	XMapRaised(dpy, barwin);
garbeam@5: 	draw_bar();
garbeam@0: 
garbeam@9: 	wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
garbeam@9: 					| LeaveWindowMask;
garbeam@0: 	wa.cursor = cursor[CurNormal];
garbeam@0: 	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
garbeam@0: 
garbeam@5: 	scan_wins();
garbeam@3: 
garbeam@5: 	while(running) {
garbeam@14: 		if(XPending(dpy) > 0) {
garbeam@14: 			XNextEvent(dpy, &ev);
garbeam@14: 			if(handler[ev.type])
garbeam@14: 				(handler[ev.type]) (&ev); /* call handler */
garbeam@14: 			continue;
garbeam@14: 		}
garbeam@14: 		FD_ZERO(&fds);
garbeam@14: 		FD_SET(ConnectionNumber(dpy), &fds);
garbeam@14: 		t = timeout;
garbeam@14: 		if(select(ConnectionNumber(dpy) + 1, &fds, NULL, NULL, &t) > 0)
garbeam@14: 			continue;
garbeam@14: 		else if(errno != EINTR)
garbeam@14: 			draw_bar();
garbeam@5: 	}
garbeam@0: 
garbeam@0: 	cleanup();
garbeam@0: 	XCloseDisplay(dpy);
garbeam@0: 
garbeam@0: 	return 0;
garbeam@0: }