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@0: #include <stdarg.h>
garbeam@0: #include <stdio.h>
garbeam@0: #include <stdlib.h>
garbeam@0: 
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@0: Display *dpy;
garbeam@0: Window root;
garbeam@0: XRectangle rect;
garbeam@0: int screen, sel_screen;
garbeam@0: Atom wm_atom[WMLast];
garbeam@0: Atom net_atom[NetLast];
garbeam@0: Cursor cursor[CurLast];
garbeam@0: unsigned int kmask, numlock_mask;
garbeam@0: Pixmap pmap;
garbeam@0: 
garbeam@0: enum { WM_PROTOCOL_DELWIN = 1 };
garbeam@0: 
garbeam@0: static Bool other_wm_running;
garbeam@0: static int (*x_error_handler) (Display *, XErrorEvent *);
garbeam@0: static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
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: void
garbeam@0: error(char *errstr, ...) {
garbeam@0: 	va_list ap;
garbeam@0: 	va_start(ap, errstr);
garbeam@0: 	vfprintf(stderr, errstr, ap);
garbeam@0: 	va_end(ap);
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@0: 				/*manage*/;
garbeam@0: 		}
garbeam@0: 	}
garbeam@0: 	if(wins)
garbeam@0: 		XFree(wins);
garbeam@0: }
garbeam@0: 
garbeam@0: static int
garbeam@0: win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
garbeam@0: {
garbeam@0: 	Atom real;
garbeam@0: 	int format;
garbeam@0: 	unsigned long res, extra;
garbeam@0: 	int status;
garbeam@0: 
garbeam@0: 	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
garbeam@0: 			&res, &extra, prop);
garbeam@0: 
garbeam@0: 	if(status != Success || *prop == 0) {
garbeam@0: 		return 0;
garbeam@0: 	}
garbeam@0: 	if(res == 0) {
garbeam@0: 		free((void *) *prop);
garbeam@0: 	}
garbeam@0: 	return res;
garbeam@0: }
garbeam@0: 
garbeam@0: int
garbeam@0: win_proto(Window w)
garbeam@0: {
garbeam@0: 	Atom *protocols;
garbeam@0: 	long res;
garbeam@0: 	int protos = 0;
garbeam@0: 	int i;
garbeam@0: 
garbeam@0: 	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
garbeam@0: 			((unsigned char **) &protocols));
garbeam@0: 	if(res <= 0) {
garbeam@0: 		return protos;
garbeam@0: 	}
garbeam@0: 	for(i = 0; i < res; i++) {
garbeam@0: 		if(protocols[i] == wm_atom[WMDelete])
garbeam@0: 			protos |= WM_PROTOCOL_DELWIN;
garbeam@0: 	}
garbeam@0: 	free((char *) protocols);
garbeam@0: 	return protos;
garbeam@0: }
garbeam@0: 
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@0: static 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: init_lock_keys()
garbeam@0: {
garbeam@0: 	XModifierKeymap *modmap;
garbeam@0: 	KeyCode numlock;
garbeam@0: 	int i;
garbeam@0: 	static int masks[] = {
garbeam@0: 		ShiftMask, LockMask, ControlMask, Mod1Mask,
garbeam@0: 		Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
garbeam@0: 	};
garbeam@0: 
garbeam@0: 	numlock_mask = 0;
garbeam@0: 	modmap = XGetModifierMapping(dpy);
garbeam@0: 	numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
garbeam@0: 
garbeam@0: 	if(modmap && modmap->max_keypermod > 0) {
garbeam@0: 		int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
garbeam@0: 		for(i = 0; i < max; i++)
garbeam@0: 			if(numlock && (modmap->modifiermap[i] == numlock))
garbeam@0: 				numlock_mask = masks[i / modmap->max_keypermod];
garbeam@0: 	}
garbeam@0: 	XFreeModifiermap(modmap);
garbeam@0: 
garbeam@0: 	kmask = 255 & ~(numlock_mask | LockMask);
garbeam@0: }
garbeam@0: 
garbeam@0: static void
garbeam@0: cleanup()
garbeam@0: {
garbeam@0: 	/*
garbeam@0: 	Client *c;
garbeam@0: 	for(c=client; c; c=c->next)
garbeam@0: 		reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
garbeam@0: 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
garbeam@0: 	*/
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@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@0: 	XSync(dpy, False);
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@0: 	wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
garbeam@0: 	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
garbeam@0: 	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@0: 	init_lock_keys();
garbeam@0: 
garbeam@0: 	pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
garbeam@0: 			DefaultDepth(dpy, screen));
garbeam@0: 
garbeam@0: 	wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
garbeam@0: 	wa.cursor = cursor[CurNormal];
garbeam@0: 	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
garbeam@0: 
garbeam@0: 	scan_wins();
garbeam@0: 
garbeam@0: 	cleanup();
garbeam@0: 	XCloseDisplay(dpy);
garbeam@0: 
garbeam@0: 	return 0;
garbeam@0: }