arg@644: /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
garbeam@0:  * See LICENSE file for license details.
garbeam@0:  */
garbeam@0: 
garbeam@76: #include "dwm.h"
garbeam@59: #include <errno.h>
arg@619: #include <locale.h>
garbeam@0: #include <stdio.h>
garbeam@0: #include <stdlib.h>
garbeam@57: #include <string.h>
garbeam@59: #include <unistd.h>
arg@138: #include <sys/select.h>
garbeam@0: #include <X11/cursorfont.h>
arg@291: #include <X11/keysym.h>
garbeam@0: #include <X11/Xatom.h>
garbeam@0: #include <X11/Xproto.h>
garbeam@0: 
arg@333: /* extern */
arg@333: 
arg@688: char stext[256];
arg@333: Bool *seltag;
arg@697: int bh, bmw, screen, sx, sy, sw, sh, wax, way, waw, wah;
arg@650: unsigned int master, nmaster, ntags, numlockmask;
arg@333: Atom wmatom[WMLast], netatom[NetLast];
arg@333: Bool running = True;
arg@716: Bool selscreen = True;
arg@333: Client *clients = NULL;
arg@333: Client *sel = NULL;
arg@446: Client *stack = NULL;
arg@333: Cursor cursor[CurLast];
arg@333: Display *dpy;
arg@333: DC dc = {0};
arg@333: Window root, barwin;
arg@333: 
garbeam@84: /* static */
garbeam@0: 
arg@123: static int (*xerrorxlib)(Display *, XErrorEvent *);
arg@302: static Bool otherwm, readin;
garbeam@0: 
garbeam@0: static void
arg@487: cleanup(void) {
arg@302: 	close(STDIN_FILENO);
arg@645: 	while(stack) {
arg@708: 		resize(stack, True);
arg@645: 		unmanage(stack);
garbeam@76: 	}
arg@295: 	if(dc.font.set)
arg@295: 		XFreeFontSet(dpy, dc.font.set);
arg@295: 	else
arg@295: 		XFreeFont(dpy, dc.font.xfont);
arg@292: 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
arg@295: 	XFreePixmap(dpy, dc.drawable);
arg@295: 	XFreeGC(dpy, dc.gc);
arg@309: 	XDestroyWindow(dpy, barwin);
arg@616: 	XFreeCursor(dpy, cursor[CurNormal]);
arg@616: 	XFreeCursor(dpy, cursor[CurResize]);
arg@616: 	XFreeCursor(dpy, cursor[CurMove]);
garbeam@76: 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
arg@292: 	XSync(dpy, False);
arg@433: 	free(seltag);
garbeam@76: }
garbeam@0: 
garbeam@0: static void
arg@487: scan(void) {
garbeam@0: 	unsigned int i, num;
arg@123: 	Window *wins, d1, d2;
garbeam@0: 	XWindowAttributes wa;
garbeam@0: 
arg@292: 	wins = NULL;
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: 
arg@333: static void
arg@487: setup(void) {
arg@333: 	int i, j;
arg@333: 	unsigned int mask;
arg@333: 	Window w;
arg@333: 	XModifierKeymap *modmap;
arg@333: 	XSetWindowAttributes wa;
arg@333: 
arg@333: 	/* init atoms */
arg@333: 	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
arg@333: 	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
arg@725: 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
arg@333: 	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
arg@333: 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
arg@333: 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
arg@333: 			PropModeReplace, (unsigned char *) netatom, NetLast);
arg@333: 	/* init cursors */
arg@333: 	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
arg@333: 	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
arg@333: 	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
arg@532: 	/* init modifier map */
arg@679: 	numlockmask = 0;
arg@333: 	modmap = XGetModifierMapping(dpy);
arg@333: 	for (i = 0; i < 8; i++) {
arg@333: 		for (j = 0; j < modmap->max_keypermod; j++) {
arg@333: 			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
arg@333: 				numlockmask = (1 << i);
arg@333: 		}
arg@333: 	}
arg@616: 	XFreeModifiermap(modmap);
arg@532: 	/* select for events */
arg@461: 	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
arg@461: 		| EnterWindowMask | LeaveWindowMask;
arg@333: 	wa.cursor = cursor[CurNormal];
arg@333: 	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
arg@333: 	grabkeys();
arg@333: 	initrregs();
arg@333: 	for(ntags = 0; tags[ntags]; ntags++);
arg@333: 	seltag = emallocz(sizeof(Bool) * ntags);
arg@333: 	seltag[0] = True;
arg@333: 	/* style */
arg@689: 	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
arg@353: 	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
arg@353: 	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
arg@689: 	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
arg@353: 	dc.sel[ColBG] = getcolor(SELBGCOLOR);
arg@353: 	dc.sel[ColFG] = getcolor(SELFGCOLOR);
arg@333: 	setfont(FONT);
arg@532: 	/* geometry */
arg@333: 	sx = sy = 0;
arg@333: 	sw = DisplayWidth(dpy, screen);
arg@333: 	sh = DisplayHeight(dpy, screen);
arg@524: 	master = MASTER;
arg@650: 	nmaster = NMASTER;
arg@688: 	bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ? textw(TILESYMBOL) : textw(FLOATSYMBOL);
arg@532: 	/* bar */
arg@353: 	dc.h = bh = dc.font.height + 2;
arg@333: 	wa.override_redirect = 1;
arg@333: 	wa.background_pixmap = ParentRelative;
arg@333: 	wa.event_mask = ButtonPressMask | ExposureMask;
arg@737: 	barwin = XCreateWindow(dpy, root, sx, sy + sh - bh, sw, bh, 0, DefaultDepth(dpy, screen),
arg@333: 			CopyFromParent, DefaultVisual(dpy, screen),
arg@333: 			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
arg@333: 	XDefineCursor(dpy, barwin, cursor[CurNormal]);
arg@333: 	XMapRaised(dpy, barwin);
arg@532: 	strcpy(stext, "dwm-"VERSION);
arg@565: 	/* windowarea */
arg@565: 	wax = sx;
arg@737: 	way = sy;
arg@565: 	wah = sh - bh;
arg@565: 	waw = sw;
arg@532: 	/* pixmap for everything */
arg@333: 	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
arg@333: 	dc.gc = XCreateGC(dpy, root, 0, 0);
arg@344: 	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
arg@532: 	/* multihead support */
arg@716: 	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
arg@333: }
arg@333: 
garbeam@76: /*
garbeam@76:  * Startup Error handler to check if another window manager
garbeam@76:  * is already running.
garbeam@76:  */
garbeam@76: static int
arg@461: xerrorstart(Display *dsply, XErrorEvent *ee) {
garbeam@76: 	otherwm = True;
garbeam@76: 	return -1;
garbeam@76: }
garbeam@76: 
garbeam@84: /* extern */
garbeam@84: 
garbeam@13: void
arg@461: sendevent(Window w, Atom a, long value) {
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@79: 	XSync(dpy, False);
garbeam@13: }
garbeam@13: 
garbeam@76: void
arg@461: quit(Arg *arg) {
arg@302: 	readin = running = False;
garbeam@75: }
garbeam@75: 
arg@532: /* There's no way to check accesses to destroyed windows, thus those cases are
garbeam@84:  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
arg@455:  * default error handler, which may call exit.
garbeam@0:  */
garbeam@10: int
arg@461: xerror(Display *dpy, XErrorEvent *ee) {
garbeam@75: 	if(ee->error_code == BadWindow
arg@123: 	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
arg@123: 	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
arg@123: 	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
arg@123: 	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
arg@123: 	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
arg@458: 	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
arg@458: 	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
garbeam@0: 		return 0;
garbeam@34: 	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
arg@123: 		ee->request_code, ee->error_code);
arg@455: 	return xerrorxlib(dpy, ee); /* may call exit */
garbeam@27: }
garbeam@27: 
garbeam@0: int
arg@461: main(int argc, char *argv[]) {
arg@581: 	char *p;
arg@333: 	int r, xfd;
garbeam@59: 	fd_set rd;
garbeam@0: 
arg@137: 	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
arg@644: 		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
arg@137: 		exit(EXIT_SUCCESS);
garbeam@0: 	}
arg@137: 	else if(argc != 1)
arg@137: 		eprint("usage: dwm [-v]\n");
arg@619: 	setlocale(LC_CTYPE, "");
garbeam@0: 	dpy = XOpenDisplay(0);
garbeam@0: 	if(!dpy)
arg@197: 		eprint("dwm: cannot open display\n");
arg@265: 	xfd = ConnectionNumber(dpy);
garbeam@0: 	screen = DefaultScreen(dpy);
garbeam@0: 	root = RootWindow(dpy, screen);
garbeam@75: 	otherwm = False;
garbeam@75: 	XSetErrorHandler(xerrorstart);
arg@197: 	/* this causes an error if some other window manager is running */
garbeam@0: 	XSelectInput(dpy, root, SubstructureRedirectMask);
garbeam@78: 	XSync(dpy, False);
garbeam@75: 	if(otherwm)
garbeam@75: 		eprint("dwm: another window manager is already running\n");
garbeam@0: 
arg@292: 	XSync(dpy, False);
garbeam@78: 	XSetErrorHandler(NULL);
garbeam@75: 	xerrorxlib = XSetErrorHandler(xerror);
arg@275: 	XSync(dpy, False);
arg@333: 	setup();
garbeam@74: 	drawstatus();
garbeam@75: 	scan();
garbeam@3: 
arg@214: 	/* main event loop, also reads status text from stdin */
arg@242: 	XSync(dpy, False);
arg@292: 	procevent();
arg@302: 	readin = True;
garbeam@5: 	while(running) {
garbeam@59: 		FD_ZERO(&rd);
arg@164: 		if(readin)
arg@164: 			FD_SET(STDIN_FILENO, &rd);
arg@265: 		FD_SET(xfd, &rd);
arg@578: 		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
arg@578: 			if(errno == EINTR)
arg@578: 				continue;
arg@581: 			eprint("select failed\n");
arg@578: 		}
arg@578: 		if(FD_ISSET(STDIN_FILENO, &rd)) {
arg@581: 			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
arg@578: 			case -1:
arg@581: 				strncpy(stext, strerror(errno), sizeof stext - 1);
arg@583: 				stext[sizeof stext - 1] = '\0';
arg@578: 				readin = False;
arg@578: 				break;
arg@578: 			case 0:
arg@583: 				strncpy(stext, "EOF", 4);
arg@578: 				readin = False;
arg@578: 				break;
arg@578: 			default:
arg@582: 				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
arg@582: 				for(p = stext + strlen(stext) - 1; p >= stext && *p != '\n'; --p);
arg@581: 				if(p > stext)
arg@581: 					strncpy(stext, p + 1, sizeof stext);
garbeam@59: 			}
arg@578: 			drawstatus();
garbeam@59: 		}
arg@578: 		if(FD_ISSET(xfd, &rd))
arg@578: 			procevent();
garbeam@5: 	}
garbeam@0: 	cleanup();
garbeam@0: 	XCloseDisplay(dpy);
garbeam@0: 	return 0;
garbeam@0: }