1/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
  2 * See LICENSE file for license details.
  3 */
  4
  5#include "dwm.h"
  6#include <errno.h>
  7#include <locale.h>
  8#include <stdio.h>
  9#include <stdlib.h>
 10#include <string.h>
 11#include <unistd.h>
 12#include <sys/select.h>
 13#include <X11/cursorfont.h>
 14#include <X11/keysym.h>
 15#include <X11/Xatom.h>
 16#include <X11/Xproto.h>
 17
 18/* extern */
 19
 20char stext[1024];
 21Bool *seltag;
 22int bx, by, bw, bh, bmw, masterd, screen, sx, sy, sw, sh, wax, way, waw, wah;
 23unsigned int master, nmaster, ntags, numlockmask;
 24Atom wmatom[WMLast], netatom[NetLast];
 25Bool running = True;
 26Bool issel = True;
 27Client *clients = NULL;
 28Client *sel = NULL;
 29Client *stack = NULL;
 30Cursor cursor[CurLast];
 31Display *dpy;
 32DC dc = {0};
 33Window root, barwin;
 34
 35/* static */
 36
 37static int (*xerrorxlib)(Display *, XErrorEvent *);
 38static Bool otherwm, readin;
 39
 40static void
 41cleanup(void) {
 42	close(STDIN_FILENO);
 43	while(stack) {
 44		resize(stack, True, TopLeft);
 45		unmanage(stack);
 46	}
 47	if(dc.font.set)
 48		XFreeFontSet(dpy, dc.font.set);
 49	else
 50		XFreeFont(dpy, dc.font.xfont);
 51	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 52	XFreePixmap(dpy, dc.drawable);
 53	XFreeGC(dpy, dc.gc);
 54	XDestroyWindow(dpy, barwin);
 55	XFreeCursor(dpy, cursor[CurNormal]);
 56	XFreeCursor(dpy, cursor[CurResize]);
 57	XFreeCursor(dpy, cursor[CurMove]);
 58	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 59	XSync(dpy, False);
 60	free(seltag);
 61}
 62
 63static void
 64scan(void) {
 65	unsigned int i, num;
 66	Window *wins, d1, d2;
 67	XWindowAttributes wa;
 68
 69	wins = NULL;
 70	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 71		for(i = 0; i < num; i++) {
 72			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 73				continue;
 74			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 75				continue;
 76			if(wa.map_state == IsViewable)
 77				manage(wins[i], &wa);
 78		}
 79	}
 80	if(wins)
 81		XFree(wins);
 82}
 83
 84static void
 85setup(void) {
 86	int i, j;
 87	unsigned int mask;
 88	Window w;
 89	XModifierKeymap *modmap;
 90	XSetWindowAttributes wa;
 91
 92	/* init atoms */
 93	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 94	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 95	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 96	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 97	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 98			PropModeReplace, (unsigned char *) netatom, NetLast);
 99	/* init cursors */
100	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
101	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
102	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
103	/* init modifier map */
104	modmap = XGetModifierMapping(dpy);
105	for (i = 0; i < 8; i++) {
106		for (j = 0; j < modmap->max_keypermod; j++) {
107			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
108				numlockmask = (1 << i);
109		}
110	}
111	XFreeModifiermap(modmap);
112	/* select for events */
113	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
114		| EnterWindowMask | LeaveWindowMask;
115	wa.cursor = cursor[CurNormal];
116	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
117	grabkeys();
118	initrregs();
119	for(ntags = 0; tags[ntags]; ntags++);
120	seltag = emallocz(sizeof(Bool) * ntags);
121	seltag[0] = True;
122	/* style */
123	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
124	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
125	dc.sel[ColBG] = getcolor(SELBGCOLOR);
126	dc.sel[ColFG] = getcolor(SELFGCOLOR);
127	dc.status[ColBG] = getcolor(STATUSBGCOLOR);
128	dc.status[ColFG] = getcolor(STATUSFGCOLOR);
129	setfont(FONT);
130	/* geometry */
131	bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ?  textw(TILESYMBOL) : textw(FLOATSYMBOL);
132	sx = sy = 0;
133	sw = DisplayWidth(dpy, screen);
134	sh = DisplayHeight(dpy, screen);
135	master = MASTER;
136	nmaster = NMASTER;
137	/* bar */
138	bx = sx;
139	by = sy;
140	bw = sw;
141	dc.h = bh = dc.font.height + 2;
142	wa.override_redirect = 1;
143	wa.background_pixmap = ParentRelative;
144	wa.event_mask = ButtonPressMask | ExposureMask;
145	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
146			CopyFromParent, DefaultVisual(dpy, screen),
147			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
148	XDefineCursor(dpy, barwin, cursor[CurNormal]);
149	XMapRaised(dpy, barwin);
150	strcpy(stext, "dwm-"VERSION);
151	/* windowarea */
152	wax = sx;
153	way = sy + bh;
154	wah = sh - bh;
155	waw = sw;
156	/* pixmap for everything */
157	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
158	dc.gc = XCreateGC(dpy, root, 0, 0);
159	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
160	/* multihead support */
161	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
162}
163
164/*
165 * Startup Error handler to check if another window manager
166 * is already running.
167 */
168static int
169xerrorstart(Display *dsply, XErrorEvent *ee) {
170	otherwm = True;
171	return -1;
172}
173
174/* extern */
175
176int
177getproto(Window w) {
178	int i, format, protos, status;
179	unsigned long extra, res;
180	Atom *protocols, real;
181
182	protos = 0;
183	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
184			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
185	if(status != Success || protocols == 0)
186		return protos;
187	for(i = 0; i < res; i++)
188		if(protocols[i] == wmatom[WMDelete])
189			protos |= PROTODELWIN;
190	free(protocols);
191	return protos;
192}
193
194void
195sendevent(Window w, Atom a, long value) {
196	XEvent e;
197
198	e.type = ClientMessage;
199	e.xclient.window = w;
200	e.xclient.message_type = a;
201	e.xclient.format = 32;
202	e.xclient.data.l[0] = value;
203	e.xclient.data.l[1] = CurrentTime;
204	XSendEvent(dpy, w, False, NoEventMask, &e);
205	XSync(dpy, False);
206}
207
208void
209quit(Arg *arg) {
210	readin = running = False;
211}
212
213/* There's no way to check accesses to destroyed windows, thus those cases are
214 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
215 * default error handler, which may call exit.
216 */
217int
218xerror(Display *dpy, XErrorEvent *ee) {
219	if(ee->error_code == BadWindow
220	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
221	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
222	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
223	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
224	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
225	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
226	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
227		return 0;
228	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
229		ee->request_code, ee->error_code);
230	return xerrorxlib(dpy, ee); /* may call exit */
231}
232
233int
234main(int argc, char *argv[]) {
235	char *p;
236	int r, xfd;
237	fd_set rd;
238
239	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
240		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
241		exit(EXIT_SUCCESS);
242	}
243	else if(argc != 1)
244		eprint("usage: dwm [-v]\n");
245	setlocale(LC_CTYPE, "");
246	dpy = XOpenDisplay(0);
247	if(!dpy)
248		eprint("dwm: cannot open display\n");
249	xfd = ConnectionNumber(dpy);
250	screen = DefaultScreen(dpy);
251	root = RootWindow(dpy, screen);
252	otherwm = False;
253	XSetErrorHandler(xerrorstart);
254	/* this causes an error if some other window manager is running */
255	XSelectInput(dpy, root, SubstructureRedirectMask);
256	XSync(dpy, False);
257	if(otherwm)
258		eprint("dwm: another window manager is already running\n");
259
260	XSync(dpy, False);
261	XSetErrorHandler(NULL);
262	xerrorxlib = XSetErrorHandler(xerror);
263	XSync(dpy, False);
264	setup();
265	drawstatus();
266	scan();
267
268	/* main event loop, also reads status text from stdin */
269	XSync(dpy, False);
270	procevent();
271	readin = True;
272	while(running) {
273		FD_ZERO(&rd);
274		if(readin)
275			FD_SET(STDIN_FILENO, &rd);
276		FD_SET(xfd, &rd);
277		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
278			if(errno == EINTR)
279				continue;
280			eprint("select failed\n");
281		}
282		if(FD_ISSET(STDIN_FILENO, &rd)) {
283			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
284			case -1:
285				strncpy(stext, strerror(errno), sizeof stext - 1);
286				stext[sizeof stext - 1] = '\0';
287				readin = False;
288				break;
289			case 0:
290				strncpy(stext, "EOF", 4);
291				readin = False;
292				break;
293			default:
294				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
295				for(p = stext + strlen(stext) - 1; p >= stext && *p != '\n'; --p);
296				if(p > stext)
297					strncpy(stext, p + 1, sizeof stext);
298			}
299			drawstatus();
300		}
301		if(FD_ISSET(xfd, &rd))
302			procevent();
303	}
304	cleanup();
305	XCloseDisplay(dpy);
306	return 0;
307}