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[256];
 21Bool *seltag;
 22int bh, bmw, screen, sx, sy, sw, sh, wax, way, waw, wah;
 23unsigned int master, nmaster, ntags, numlockmask;
 24Atom wmatom[WMLast], netatom[NetLast];
 25Bool running = True;
 26Bool selscreen = 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);
 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	numlockmask = 0;
105	modmap = XGetModifierMapping(dpy);
106	for (i = 0; i < 8; i++) {
107		for (j = 0; j < modmap->max_keypermod; j++) {
108			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
109				numlockmask = (1 << i);
110		}
111	}
112	XFreeModifiermap(modmap);
113	/* select for events */
114	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
115		| EnterWindowMask | LeaveWindowMask;
116	wa.cursor = cursor[CurNormal];
117	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
118	grabkeys();
119	initrregs();
120	for(ntags = 0; tags[ntags]; ntags++);
121	seltag = emallocz(sizeof(Bool) * ntags);
122	seltag[0] = True;
123	/* style */
124	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
125	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
126	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
127	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
128	dc.sel[ColBG] = getcolor(SELBGCOLOR);
129	dc.sel[ColFG] = getcolor(SELFGCOLOR);
130	setfont(FONT);
131	/* geometry */
132	sx = sy = 0;
133	sw = DisplayWidth(dpy, screen);
134	sh = DisplayHeight(dpy, screen);
135	master = MASTER;
136	nmaster = NMASTER;
137	bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ? textw(TILESYMBOL) : textw(FLOATSYMBOL);
138	/* bar */
139	dc.h = bh = dc.font.height + 2;
140	wa.override_redirect = 1;
141	wa.background_pixmap = ParentRelative;
142	wa.event_mask = ButtonPressMask | ExposureMask;
143	barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0, DefaultDepth(dpy, screen),
144			CopyFromParent, DefaultVisual(dpy, screen),
145			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
146	XDefineCursor(dpy, barwin, cursor[CurNormal]);
147	XMapRaised(dpy, barwin);
148	strcpy(stext, "dwm-"VERSION);
149	/* windowarea */
150	wax = sx;
151	way = sy + bh;
152	wah = sh - bh;
153	waw = sw;
154	/* pixmap for everything */
155	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
156	dc.gc = XCreateGC(dpy, root, 0, 0);
157	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
158	/* multihead support */
159	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
160}
161
162/*
163 * Startup Error handler to check if another window manager
164 * is already running.
165 */
166static int
167xerrorstart(Display *dsply, XErrorEvent *ee) {
168	otherwm = True;
169	return -1;
170}
171
172/* extern */
173
174int
175getproto(Window w) {
176	int i, format, protos, status;
177	unsigned long extra, res;
178	Atom *protocols, real;
179
180	protos = 0;
181	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
182			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
183	if(status != Success || protocols == 0)
184		return protos;
185	for(i = 0; i < res; i++)
186		if(protocols[i] == wmatom[WMDelete])
187			protos |= PROTODELWIN;
188	free(protocols);
189	return protos;
190}
191
192void
193sendevent(Window w, Atom a, long value) {
194	XEvent e;
195
196	e.type = ClientMessage;
197	e.xclient.window = w;
198	e.xclient.message_type = a;
199	e.xclient.format = 32;
200	e.xclient.data.l[0] = value;
201	e.xclient.data.l[1] = CurrentTime;
202	XSendEvent(dpy, w, False, NoEventMask, &e);
203	XSync(dpy, False);
204}
205
206void
207quit(Arg *arg) {
208	readin = running = False;
209}
210
211/* There's no way to check accesses to destroyed windows, thus those cases are
212 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
213 * default error handler, which may call exit.
214 */
215int
216xerror(Display *dpy, XErrorEvent *ee) {
217	if(ee->error_code == BadWindow
218	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
219	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
220	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
221	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
222	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
223	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
224	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
225		return 0;
226	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
227		ee->request_code, ee->error_code);
228	return xerrorxlib(dpy, ee); /* may call exit */
229}
230
231int
232main(int argc, char *argv[]) {
233	char *p;
234	int r, xfd;
235	fd_set rd;
236
237	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
238		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
239		exit(EXIT_SUCCESS);
240	}
241	else if(argc != 1)
242		eprint("usage: dwm [-v]\n");
243	setlocale(LC_CTYPE, "");
244	dpy = XOpenDisplay(0);
245	if(!dpy)
246		eprint("dwm: cannot open display\n");
247	xfd = ConnectionNumber(dpy);
248	screen = DefaultScreen(dpy);
249	root = RootWindow(dpy, screen);
250	otherwm = False;
251	XSetErrorHandler(xerrorstart);
252	/* this causes an error if some other window manager is running */
253	XSelectInput(dpy, root, SubstructureRedirectMask);
254	XSync(dpy, False);
255	if(otherwm)
256		eprint("dwm: another window manager is already running\n");
257
258	XSync(dpy, False);
259	XSetErrorHandler(NULL);
260	xerrorxlib = XSetErrorHandler(xerror);
261	XSync(dpy, False);
262	setup();
263	drawstatus();
264	scan();
265
266	/* main event loop, also reads status text from stdin */
267	XSync(dpy, False);
268	procevent();
269	readin = True;
270	while(running) {
271		FD_ZERO(&rd);
272		if(readin)
273			FD_SET(STDIN_FILENO, &rd);
274		FD_SET(xfd, &rd);
275		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
276			if(errno == EINTR)
277				continue;
278			eprint("select failed\n");
279		}
280		if(FD_ISSET(STDIN_FILENO, &rd)) {
281			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
282			case -1:
283				strncpy(stext, strerror(errno), sizeof stext - 1);
284				stext[sizeof stext - 1] = '\0';
285				readin = False;
286				break;
287			case 0:
288				strncpy(stext, "EOF", 4);
289				readin = False;
290				break;
291			default:
292				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
293				for(p = stext + strlen(stext) - 1; p >= stext && *p != '\n'; --p);
294				if(p > stext)
295					strncpy(stext, p + 1, sizeof stext);
296			}
297			drawstatus();
298		}
299		if(FD_ISSET(xfd, &rd))
300			procevent();
301	}
302	cleanup();
303	XCloseDisplay(dpy);
304	return 0;
305}