1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/wm.c	Mon Jul 10 16:38:18 2006 +0200
     1.3 @@ -0,0 +1,264 @@
     1.4 +/*
     1.5 + * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
     1.6 + * See LICENSE file for license details.
     1.7 + */
     1.8 +
     1.9 +#include <stdarg.h>
    1.10 +#include <stdio.h>
    1.11 +#include <stdlib.h>
    1.12 +
    1.13 +#include <X11/cursorfont.h>
    1.14 +#include <X11/Xatom.h>
    1.15 +#include <X11/Xproto.h>
    1.16 +
    1.17 +#include "wm.h"
    1.18 +
    1.19 +Display *dpy;
    1.20 +Window root;
    1.21 +XRectangle rect;
    1.22 +int screen, sel_screen;
    1.23 +Atom wm_atom[WMLast];
    1.24 +Atom net_atom[NetLast];
    1.25 +Cursor cursor[CurLast];
    1.26 +unsigned int kmask, numlock_mask;
    1.27 +Pixmap pmap;
    1.28 +
    1.29 +enum { WM_PROTOCOL_DELWIN = 1 };
    1.30 +
    1.31 +static Bool other_wm_running;
    1.32 +static int (*x_error_handler) (Display *, XErrorEvent *);
    1.33 +static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
    1.34 +
    1.35 +static void
    1.36 +usage()
    1.37 +{
    1.38 +	fputs("usage: gridwm [-v]\n", stderr);
    1.39 +	exit(1);
    1.40 +}
    1.41 +
    1.42 +void
    1.43 +error(char *errstr, ...) {
    1.44 +	va_list ap;
    1.45 +	va_start(ap, errstr);
    1.46 +	vfprintf(stderr, errstr, ap);
    1.47 +	va_end(ap);
    1.48 +	exit(1);
    1.49 +}
    1.50 +
    1.51 +static void
    1.52 +scan_wins()
    1.53 +{
    1.54 +	unsigned int i, num;
    1.55 +	Window *wins;
    1.56 +	XWindowAttributes wa;
    1.57 +	Window d1, d2;
    1.58 +
    1.59 +	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
    1.60 +		for(i = 0; i < num; i++) {
    1.61 +			if(!XGetWindowAttributes(dpy, wins[i], &wa))
    1.62 +				continue;
    1.63 +			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
    1.64 +				continue;
    1.65 +			if(wa.map_state == IsViewable)
    1.66 +				/*manage*/;
    1.67 +		}
    1.68 +	}
    1.69 +	if(wins)
    1.70 +		XFree(wins);
    1.71 +}
    1.72 +
    1.73 +static int
    1.74 +win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
    1.75 +{
    1.76 +	Atom real;
    1.77 +	int format;
    1.78 +	unsigned long res, extra;
    1.79 +	int status;
    1.80 +
    1.81 +	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
    1.82 +			&res, &extra, prop);
    1.83 +
    1.84 +	if(status != Success || *prop == 0) {
    1.85 +		return 0;
    1.86 +	}
    1.87 +	if(res == 0) {
    1.88 +		free((void *) *prop);
    1.89 +	}
    1.90 +	return res;
    1.91 +}
    1.92 +
    1.93 +int
    1.94 +win_proto(Window w)
    1.95 +{
    1.96 +	Atom *protocols;
    1.97 +	long res;
    1.98 +	int protos = 0;
    1.99 +	int i;
   1.100 +
   1.101 +	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
   1.102 +			((unsigned char **) &protocols));
   1.103 +	if(res <= 0) {
   1.104 +		return protos;
   1.105 +	}
   1.106 +	for(i = 0; i < res; i++) {
   1.107 +		if(protocols[i] == wm_atom[WMDelete])
   1.108 +			protos |= WM_PROTOCOL_DELWIN;
   1.109 +	}
   1.110 +	free((char *) protocols);
   1.111 +	return protos;
   1.112 +}
   1.113 +
   1.114 +/*
   1.115 + * There's no way to check accesses to destroyed windows, thus
   1.116 + * those cases are ignored (especially on UnmapNotify's).
   1.117 + * Other types of errors call Xlib's default error handler, which
   1.118 + * calls exit().
   1.119 + */
   1.120 +static int
   1.121 +error_handler(Display *dpy, XErrorEvent *error)
   1.122 +{
   1.123 +	if(error->error_code == BadWindow
   1.124 +			|| (error->request_code == X_SetInputFocus
   1.125 +				&& error->error_code == BadMatch)
   1.126 +			|| (error->request_code == X_PolyText8
   1.127 +				&& error->error_code == BadDrawable)
   1.128 +			|| (error->request_code == X_PolyFillRectangle
   1.129 +				&& error->error_code == BadDrawable)
   1.130 +			|| (error->request_code == X_PolySegment
   1.131 +				&& error->error_code == BadDrawable)
   1.132 +			|| (error->request_code == X_ConfigureWindow
   1.133 +				&& error->error_code == BadMatch)
   1.134 +			|| (error->request_code == X_GrabKey
   1.135 +				&& error->error_code == BadAccess))
   1.136 +		return 0;
   1.137 +	fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
   1.138 +			error->request_code, error->error_code);
   1.139 +	return x_error_handler(dpy, error); /* may call exit() */
   1.140 +}
   1.141 +
   1.142 +/*
   1.143 + * Startup Error handler to check if another window manager
   1.144 + * is already running.
   1.145 + */
   1.146 +static int
   1.147 +startup_error_handler(Display *dpy, XErrorEvent *error)
   1.148 +{
   1.149 +	other_wm_running = True;
   1.150 +	return -1;
   1.151 +}
   1.152 +
   1.153 +static void
   1.154 +init_lock_keys()
   1.155 +{
   1.156 +	XModifierKeymap *modmap;
   1.157 +	KeyCode numlock;
   1.158 +	int i;
   1.159 +	static int masks[] = {
   1.160 +		ShiftMask, LockMask, ControlMask, Mod1Mask,
   1.161 +		Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
   1.162 +	};
   1.163 +
   1.164 +	numlock_mask = 0;
   1.165 +	modmap = XGetModifierMapping(dpy);
   1.166 +	numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
   1.167 +
   1.168 +	if(modmap && modmap->max_keypermod > 0) {
   1.169 +		int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
   1.170 +		for(i = 0; i < max; i++)
   1.171 +			if(numlock && (modmap->modifiermap[i] == numlock))
   1.172 +				numlock_mask = masks[i / modmap->max_keypermod];
   1.173 +	}
   1.174 +	XFreeModifiermap(modmap);
   1.175 +
   1.176 +	kmask = 255 & ~(numlock_mask | LockMask);
   1.177 +}
   1.178 +
   1.179 +static void
   1.180 +cleanup()
   1.181 +{
   1.182 +	/*
   1.183 +	Client *c;
   1.184 +	for(c=client; c; c=c->next)
   1.185 +		reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
   1.186 +	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
   1.187 +	*/
   1.188 +}
   1.189 +
   1.190 +int
   1.191 +main(int argc, char *argv[])
   1.192 +{
   1.193 +	int i;
   1.194 +	XSetWindowAttributes wa;
   1.195 +	unsigned int mask;
   1.196 +	Window w;
   1.197 +
   1.198 +	/* command line args */
   1.199 +	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
   1.200 +		switch (argv[i][1]) {
   1.201 +		case 'v':
   1.202 +			fprintf(stdout, "%s", version);
   1.203 +			exit(0);
   1.204 +			break;
   1.205 +		default:
   1.206 +			usage();
   1.207 +			break;
   1.208 +		}
   1.209 +	}
   1.210 +
   1.211 +	dpy = XOpenDisplay(0);
   1.212 +	if(!dpy)
   1.213 +		error("gridwm: cannot connect X server\n");
   1.214 +
   1.215 +	screen = DefaultScreen(dpy);
   1.216 +	root = RootWindow(dpy, screen);
   1.217 +
   1.218 +	/* check if another WM is already running */
   1.219 +	other_wm_running = False;
   1.220 +	XSetErrorHandler(startup_error_handler);
   1.221 +	/* this causes an error if some other WM is running */
   1.222 +	XSelectInput(dpy, root, SubstructureRedirectMask);
   1.223 +	XSync(dpy, False);
   1.224 +
   1.225 +	if(other_wm_running)
   1.226 +		error("gridwm: another window manager is already running\n");
   1.227 +
   1.228 +	rect.x = rect.y = 0;
   1.229 +	rect.width = DisplayWidth(dpy, screen);
   1.230 +	rect.height = DisplayHeight(dpy, screen);
   1.231 +	sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
   1.232 +
   1.233 +	XSetErrorHandler(0);
   1.234 +	x_error_handler = XSetErrorHandler(error_handler);
   1.235 +
   1.236 +	/* init atoms */
   1.237 +	wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
   1.238 +	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
   1.239 +	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
   1.240 +	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
   1.241 +	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
   1.242 +
   1.243 +	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
   1.244 +			PropModeReplace, (unsigned char *) net_atom, NetLast);
   1.245 +
   1.246 +
   1.247 +	/* init cursors */
   1.248 +	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
   1.249 +	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
   1.250 +	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
   1.251 +
   1.252 +	init_lock_keys();
   1.253 +
   1.254 +	pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
   1.255 +			DefaultDepth(dpy, screen));
   1.256 +
   1.257 +	wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
   1.258 +	wa.cursor = cursor[CurNormal];
   1.259 +	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
   1.260 +
   1.261 +	scan_wins();
   1.262 +
   1.263 +	cleanup();
   1.264 +	XCloseDisplay(dpy);
   1.265 +
   1.266 +	return 0;
   1.267 +}