initial import

LICENSE

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+MIT/X Consortium License
+
+(C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the 
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software. 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+DEALINGS IN THE SOFTWARE.

Makefile

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+# gridwm - grid window manager
+#   (C)opyright MMVI Anselm R. Garbe
+
+include config.mk
+
+SRC      = wm.c
+OBJ      = ${SRC:.c=.o}
+
+all: gridwm
+	@echo finished
+
+.c.o:
+	@echo CC $<
+	@${CC} -c ${CFLAGS} $<
+
+${OBJ}: wm.h
+
+gridwm: ${OBJ}
+	@echo LD $@
+	@${CC} -o $@ ${OBJ} ${X11LDFLAGS}
+
+clean:
+	rm -f gridwm *.o

README

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+gridwm
+------
+
+gridwm is an automatic X11 window manager which arranges all windows in a grid.
+
+
+Requirements
+------------
+In order to build gridwm you need the Xlib header files.
+
+
+Installation
+------------
+Edit config.mk to match your local setup. gridwm is installed into
+the /usr/local namespace by default.
+
+Afterwards enter the following command to build and install gridwm (if
+necessary as root):
+
+    make clean install
+
+
+Running gridwm
+--------------
+Add the following line to your .xinitrc to start gridwm using startx:
+
+    exec gridwm
+
+In order to connect gridwm to a specific display, make sure that
+the DISPLAY environment variable is set correctly, e.g.:
+
+    DISPLAY=foo.bar:1 exec wmii
+
+This will start gridwm on display :1 of the host foo.bar.
+
+
+Configuration
+-------------
+The configuration of gridwm is done by customizing the config.h
+source file.

config.mk

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+# Customize to fit your system
+
+# paths
+PREFIX = /usr/local
+CONFPREFIX = ${PREFIX}/etc
+MANPREFIX = ${PREFIX}/share/man
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+VERSION = 0.0
+
+# includes and libs
+LIBS = -L${PREFIX}/lib -L/usr/lib -lc
+X11LIBS = -L${X11LIB} -lX11
+
+# Linux/BSD
+CFLAGS = -g -Wall -I. -I${PREFIX}/include -I/usr/include -I${X11INC} \
+	-DVERSION=\"${VERSION}\"
+LDFLAGS = -g ${LIBS}
+X11LDFLAGS = ${LDFLAGS} ${X11LIBS}
+
+# Solaris
+#CFLAGS = -fast -xtarget=ultra ${INCLUDES} -DVERSION=\"${VERSION}\"
+#LIBS += -lnsl -lsocket
+
+AR = ar cr
+CC = cc
+RANLIB = ranlib

gridwm.1

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+.TH GRIDWM 1 gridwm-0.0
+.SH NAME
+gridwm \- grid window manager
+.SH SYNOPSIS
+.B gridwm
+.RB [ \-v ]
+.SH DESCRIPTION
+.SS Overview
+.B gridwm
+is an automatic window manager for X11.
+.SS Options
+.TP
+.B \-v
+prints version information to stdout, then exits.
+.SH SEE ALSO
+.BR gridmenu (1)

wm.c

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+/*
+ * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <X11/cursorfont.h>
+#include <X11/Xatom.h>
+#include <X11/Xproto.h>
+
+#include "wm.h"
+
+Display *dpy;
+Window root;
+XRectangle rect;
+int screen, sel_screen;
+Atom wm_atom[WMLast];
+Atom net_atom[NetLast];
+Cursor cursor[CurLast];
+unsigned int kmask, numlock_mask;
+Pixmap pmap;
+
+enum { WM_PROTOCOL_DELWIN = 1 };
+
+static Bool other_wm_running;
+static int (*x_error_handler) (Display *, XErrorEvent *);
+static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
+
+static void
+usage()
+{
+	fputs("usage: gridwm [-v]\n", stderr);
+	exit(1);
+}
+
+void
+error(char *errstr, ...) {
+	va_list ap;
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(1);
+}
+
+static void
+scan_wins()
+{
+	unsigned int i, num;
+	Window *wins;
+	XWindowAttributes wa;
+	Window d1, d2;
+
+	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
+		for(i = 0; i < num; i++) {
+			if(!XGetWindowAttributes(dpy, wins[i], &wa))
+				continue;
+			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
+				continue;
+			if(wa.map_state == IsViewable)
+				/*manage*/;
+		}
+	}
+	if(wins)
+		XFree(wins);
+}
+
+static int
+win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
+{
+	Atom real;
+	int format;
+	unsigned long res, extra;
+	int status;
+
+	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
+			&res, &extra, prop);
+
+	if(status != Success || *prop == 0) {
+		return 0;
+	}
+	if(res == 0) {
+		free((void *) *prop);
+	}
+	return res;
+}
+
+int
+win_proto(Window w)
+{
+	Atom *protocols;
+	long res;
+	int protos = 0;
+	int i;
+
+	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
+			((unsigned char **) &protocols));
+	if(res <= 0) {
+		return protos;
+	}
+	for(i = 0; i < res; i++) {
+		if(protocols[i] == wm_atom[WMDelete])
+			protos |= WM_PROTOCOL_DELWIN;
+	}
+	free((char *) protocols);
+	return protos;
+}
+
+/*
+ * There's no way to check accesses to destroyed windows, thus
+ * those cases are ignored (especially on UnmapNotify's).
+ * Other types of errors call Xlib's default error handler, which
+ * calls exit().
+ */
+static int
+error_handler(Display *dpy, XErrorEvent *error)
+{
+	if(error->error_code == BadWindow
+			|| (error->request_code == X_SetInputFocus
+				&& error->error_code == BadMatch)
+			|| (error->request_code == X_PolyText8
+				&& error->error_code == BadDrawable)
+			|| (error->request_code == X_PolyFillRectangle
+				&& error->error_code == BadDrawable)
+			|| (error->request_code == X_PolySegment
+				&& error->error_code == BadDrawable)
+			|| (error->request_code == X_ConfigureWindow
+				&& error->error_code == BadMatch)
+			|| (error->request_code == X_GrabKey
+				&& error->error_code == BadAccess))
+		return 0;
+	fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
+			error->request_code, error->error_code);
+	return x_error_handler(dpy, error); /* may call exit() */
+}
+
+/*
+ * Startup Error handler to check if another window manager
+ * is already running.
+ */
+static int
+startup_error_handler(Display *dpy, XErrorEvent *error)
+{
+	other_wm_running = True;
+	return -1;
+}
+
+static void
+init_lock_keys()
+{
+	XModifierKeymap *modmap;
+	KeyCode numlock;
+	int i;
+	static int masks[] = {
+		ShiftMask, LockMask, ControlMask, Mod1Mask,
+		Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
+	};
+
+	numlock_mask = 0;
+	modmap = XGetModifierMapping(dpy);
+	numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
+
+	if(modmap && modmap->max_keypermod > 0) {
+		int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
+		for(i = 0; i < max; i++)
+			if(numlock && (modmap->modifiermap[i] == numlock))
+				numlock_mask = masks[i / modmap->max_keypermod];
+	}
+	XFreeModifiermap(modmap);
+
+	kmask = 255 & ~(numlock_mask | LockMask);
+}
+
+static void
+cleanup()
+{
+	/*
+	Client *c;
+	for(c=client; c; c=c->next)
+		reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
+	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
+	*/
+}
+
+int
+main(int argc, char *argv[])
+{
+	int i;
+	XSetWindowAttributes wa;
+	unsigned int mask;
+	Window w;
+
+	/* command line args */
+	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
+		switch (argv[i][1]) {
+		case 'v':
+			fprintf(stdout, "%s", version);
+			exit(0);
+			break;
+		default:
+			usage();
+			break;
+		}
+	}
+
+	dpy = XOpenDisplay(0);
+	if(!dpy)
+		error("gridwm: cannot connect X server\n");
+
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+
+	/* check if another WM is already running */
+	other_wm_running = False;
+	XSetErrorHandler(startup_error_handler);
+	/* this causes an error if some other WM is running */
+	XSelectInput(dpy, root, SubstructureRedirectMask);
+	XSync(dpy, False);
+
+	if(other_wm_running)
+		error("gridwm: another window manager is already running\n");
+
+	rect.x = rect.y = 0;
+	rect.width = DisplayWidth(dpy, screen);
+	rect.height = DisplayHeight(dpy, screen);
+	sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
+
+	XSetErrorHandler(0);
+	x_error_handler = XSetErrorHandler(error_handler);
+
+	/* init atoms */
+	wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
+	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
+	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
+	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
+
+	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
+			PropModeReplace, (unsigned char *) net_atom, NetLast);
+
+
+	/* init cursors */
+	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
+	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
+	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
+
+	init_lock_keys();
+
+	pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
+			DefaultDepth(dpy, screen));
+
+	wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
+	wa.cursor = cursor[CurNormal];
+	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
+
+	scan_wins();
+
+	cleanup();
+	XCloseDisplay(dpy);
+
+	return 0;
+}

wm.h

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+/*
+ * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+/* WM atoms */
+enum { WMState, WMProtocols, WMDelete, WMLast };
+
+/* NET atoms */
+enum { NetSupported, NetWMName, NetLast };
+
+/* Cursor */
+enum { CurNormal, CurResize, CurMove, CurInput, CurLast };
+
+/* Rects */
+enum { RFloat, RGrid, RLast };
+
+typedef struct Client Client;
+typedef struct Tag Tag;
+
+struct Client {
+	Tag *tag;
+	char name[256];
+	int proto;
+	Window win;
+	Window trans;
+	Window title;
+	GC gc;
+	XSizeHints size;
+	XRectangle r[RLast];
+	Client *next;
+	Client *tnext;
+	Client *tprev;
+};
+
+struct Tag {
+	char name[256];
+	Client *clients;
+	Client *sel;
+	XRectangle r;
+};
+
+extern Display *dpy;
+extern Window root;
+extern XRectangle rect;
+extern int screen, sel_screen;
+extern unsigned int kmask, numlock_mask;
+extern Atom wm_atom[WMLast];
+extern Atom net_atom[NetLast];
+extern Cursor cursor[CurLast];
+extern Pixmap pmap;
+
+/* wm.c */
+extern void error(char *errstr, ...);