1/* See LICENSE file for copyright and license details. */
  2#include "dwm.h"
  3#include <errno.h>
  4#include <locale.h>
  5#include <stdio.h>
  6#include <stdlib.h>
  7#include <string.h>
  8#include <unistd.h>
  9#include <sys/select.h>
 10#include <X11/cursorfont.h>
 11#include <X11/keysym.h>
 12#include <X11/Xatom.h>
 13#include <X11/Xproto.h>
 14
 15/* extern */
 16
 17char stext[256];
 18int screen, sx, sy, sw, sh, wax, way, waw, wah;
 19unsigned int bh, ntags;
 20unsigned int bpos = BARPOS;
 21unsigned int numlockmask = 0;
 22Atom wmatom[WMLast], netatom[NetLast];
 23Bool *seltag;
 24Bool selscreen = True;
 25Client *clients = NULL;
 26Client *sel = NULL;
 27Client *stack = NULL;
 28Cursor cursor[CurLast];
 29Display *dpy;
 30DC dc = {0};
 31Window root, barwin;
 32
 33/* static */
 34
 35static int (*xerrorxlib)(Display *, XErrorEvent *);
 36static Bool otherwm, readin;
 37static Bool running = True;
 38
 39static void
 40cleanup(void) {
 41	close(STDIN_FILENO);
 42	while(stack) {
 43		unban(stack);
 44		unmanage(stack);
 45	}
 46	if(dc.font.set)
 47		XFreeFontSet(dpy, dc.font.set);
 48	else
 49		XFreeFont(dpy, dc.font.xfont);
 50	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 51	XFreePixmap(dpy, dc.drawable);
 52	XFreeGC(dpy, dc.gc);
 53	XDestroyWindow(dpy, barwin);
 54	XFreeCursor(dpy, cursor[CurNormal]);
 55	XFreeCursor(dpy, cursor[CurResize]);
 56	XFreeCursor(dpy, cursor[CurMove]);
 57	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 58	XSync(dpy, False);
 59	free(seltag);
 60}
 61
 62static unsigned long
 63initcolor(const char *colstr) {
 64	Colormap cmap = DefaultColormap(dpy, screen);
 65	XColor color;
 66
 67	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 68		eprint("error, cannot allocate color '%s'\n", colstr);
 69	return color.pixel;
 70}
 71
 72static void
 73initfont(const char *fontstr) {
 74	char *def, **missing;
 75	int i, n;
 76
 77	missing = NULL;
 78	if(dc.font.set)
 79		XFreeFontSet(dpy, dc.font.set);
 80	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 81	if(missing) {
 82		while(n--)
 83			fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 84		XFreeStringList(missing);
 85	}
 86	if(dc.font.set) {
 87		XFontSetExtents *font_extents;
 88		XFontStruct **xfonts;
 89		char **font_names;
 90		dc.font.ascent = dc.font.descent = 0;
 91		font_extents = XExtentsOfFontSet(dc.font.set);
 92		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 93		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 94			if(dc.font.ascent < (*xfonts)->ascent)
 95				dc.font.ascent = (*xfonts)->ascent;
 96			if(dc.font.descent < (*xfonts)->descent)
 97				dc.font.descent = (*xfonts)->descent;
 98			xfonts++;
 99		}
100	}
101	else {
102		if(dc.font.xfont)
103			XFreeFont(dpy, dc.font.xfont);
104		dc.font.xfont = NULL;
105		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
106			eprint("error, cannot load font: '%s'\n", fontstr);
107		dc.font.ascent = dc.font.xfont->ascent;
108		dc.font.descent = dc.font.xfont->descent;
109	}
110	dc.font.height = dc.font.ascent + dc.font.descent;
111}
112
113static void
114scan(void) {
115	unsigned int i, num;
116	Window *wins, d1, d2;
117	XWindowAttributes wa;
118
119	wins = NULL;
120	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
121		for(i = 0; i < num; i++) {
122			if(!XGetWindowAttributes(dpy, wins[i], &wa)
123			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
124				continue;
125			if(wa.map_state == IsViewable)
126				manage(wins[i], &wa);
127		}
128	}
129	if(wins)
130		XFree(wins);
131}
132
133static void
134setup(void) {
135	int i, j;
136	unsigned int mask;
137	Window w;
138	XModifierKeymap *modmap;
139	XSetWindowAttributes wa;
140
141	/* init atoms */
142	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
143	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
144	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
145	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
146	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
147	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
148			PropModeReplace, (unsigned char *) netatom, NetLast);
149	/* init cursors */
150	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
151	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
152	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
153	/* init modifier map */
154	modmap = XGetModifierMapping(dpy);
155	for (i = 0; i < 8; i++)
156		for (j = 0; j < modmap->max_keypermod; j++) {
157			if(modmap->modifiermap[i * modmap->max_keypermod + j]
158					== XKeysymToKeycode(dpy, XK_Num_Lock))
159				numlockmask = (1 << i);
160		}
161	XFreeModifiermap(modmap);
162	/* select for events */
163	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
164		| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
165	wa.cursor = cursor[CurNormal];
166	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
167	XSelectInput(dpy, root, wa.event_mask);
168	grabkeys();
169	compileregs();
170	for(ntags = 0; tags[ntags]; ntags++);
171	seltag = emallocz(sizeof(Bool) * ntags);
172	seltag[0] = True;
173	/* style */
174	dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
175	dc.norm[ColBG] = initcolor(NORMBGCOLOR);
176	dc.norm[ColFG] = initcolor(NORMFGCOLOR);
177	dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
178	dc.sel[ColBG] = initcolor(SELBGCOLOR);
179	dc.sel[ColFG] = initcolor(SELFGCOLOR);
180	initfont(FONT);
181	/* geometry */
182	sx = sy = 0;
183	sw = DisplayWidth(dpy, screen);
184	sh = DisplayHeight(dpy, screen);
185	initlayouts();
186	/* bar */
187	dc.h = bh = dc.font.height + 2;
188	wa.override_redirect = 1;
189	wa.background_pixmap = ParentRelative;
190	wa.event_mask = ButtonPressMask | ExposureMask;
191	barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
192			DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
193			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
194	XDefineCursor(dpy, barwin, cursor[CurNormal]);
195	updatebarpos();
196	XMapRaised(dpy, barwin);
197	strcpy(stext, "dwm-"VERSION);
198	/* pixmap for everything */
199	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
200	dc.gc = XCreateGC(dpy, root, 0, 0);
201	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
202	if(!dc.font.set)
203		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
204	/* multihead support */
205	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
206}
207
208/*
209 * Startup Error handler to check if another window manager
210 * is already running.
211 */
212static int
213xerrorstart(Display *dsply, XErrorEvent *ee) {
214	otherwm = True;
215	return -1;
216}
217
218/* extern */
219
220void
221quit(const char *arg) {
222	readin = running = False;
223}
224
225void
226updatebarpos(void) {
227	XEvent ev;
228
229	wax = sx;
230	way = sy;
231	wah = sh;
232	waw = sw;
233	switch(bpos) {
234	default:
235		wah -= bh;
236		way += bh;
237		XMoveWindow(dpy, barwin, sx, sy);
238		break;
239	case BarBot:
240		wah -= bh;
241		XMoveWindow(dpy, barwin, sx, sy + wah);
242		break;
243	case BarOff:
244		XMoveWindow(dpy, barwin, sx, sy - bh);
245		break;
246	}
247	XSync(dpy, False);
248	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
249}
250
251/* There's no way to check accesses to destroyed windows, thus those cases are
252 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
253 * default error handler, which may call exit.
254 */
255int
256xerror(Display *dpy, XErrorEvent *ee) {
257	if(ee->error_code == BadWindow
258	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
259	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
260	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
261	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
262	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
263	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
264	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
265		return 0;
266	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
267		ee->request_code, ee->error_code);
268	return xerrorxlib(dpy, ee); /* may call exit */
269}
270
271int
272main(int argc, char *argv[]) {
273	char *p;
274	int r, xfd;
275	fd_set rd;
276	XEvent ev;
277
278	if(argc == 2 && !strcmp("-v", argv[1]))
279		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
280	else if(argc != 1)
281		eprint("usage: dwm [-v]\n");
282	setlocale(LC_CTYPE, "");
283	if(!(dpy = XOpenDisplay(0)))
284		eprint("dwm: cannot open display\n");
285	xfd = ConnectionNumber(dpy);
286	screen = DefaultScreen(dpy);
287	root = RootWindow(dpy, screen);
288	otherwm = False;
289	XSetErrorHandler(xerrorstart);
290	/* this causes an error if some other window manager is running */
291	XSelectInput(dpy, root, SubstructureRedirectMask);
292	XSync(dpy, False);
293	if(otherwm)
294		eprint("dwm: another window manager is already running\n");
295
296	XSync(dpy, False);
297	XSetErrorHandler(NULL);
298	xerrorxlib = XSetErrorHandler(xerror);
299	XSync(dpy, False);
300	setup();
301	drawstatus();
302	scan();
303
304	/* main event loop, also reads status text from stdin */
305	XSync(dpy, False);
306	readin = True;
307	while(running) {
308		FD_ZERO(&rd);
309		if(readin)
310			FD_SET(STDIN_FILENO, &rd);
311		FD_SET(xfd, &rd);
312		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
313			if(errno == EINTR)
314				continue;
315			eprint("select failed\n");
316		}
317		if(FD_ISSET(STDIN_FILENO, &rd)) {
318			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
319			case -1:
320				strncpy(stext, strerror(errno), sizeof stext - 1);
321				stext[sizeof stext - 1] = '\0';
322				readin = False;
323				break;
324			case 0:
325				strncpy(stext, "EOF", 4);
326				readin = False;
327				break;
328			default:
329				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
330				for(; p >= stext && *p != '\n'; --p);
331				if(p > stext)
332					strncpy(stext, p + 1, sizeof stext);
333			}
334			drawstatus();
335		}
336		while(XPending(dpy)) {
337			XNextEvent(dpy, &ev);
338			if(handler[ev.type])
339				(handler[ev.type])(&ev); /* call handler */
340		}
341	}
342	cleanup();
343	XCloseDisplay(dpy);
344	return 0;
345}