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, bpos, ntags, numlockmask;
 20Atom wmatom[WMLast], netatom[NetLast];
 21Bool *seltag;
 22Bool selscreen = True;
 23Client *clients = NULL;
 24Client *sel = NULL;
 25Client *stack = NULL;
 26Cursor cursor[CurLast];
 27Display *dpy;
 28DC dc = {0};
 29Window root, barwin;
 30
 31/* static */
 32
 33static int (*xerrorxlib)(Display *, XErrorEvent *);
 34static Bool otherwm, readin;
 35static Bool running = True;
 36
 37static void
 38cleanup(void) {
 39	close(STDIN_FILENO);
 40	while(stack) {
 41		if(stack->isbanned)
 42			XMoveWindow(dpy, stack->win, stack->x, stack->y);
 43		unmanage(stack);
 44	}
 45	if(dc.font.set)
 46		XFreeFontSet(dpy, dc.font.set);
 47	else
 48		XFreeFont(dpy, dc.font.xfont);
 49	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 50	XFreePixmap(dpy, dc.drawable);
 51	XFreeGC(dpy, dc.gc);
 52	XDestroyWindow(dpy, barwin);
 53	XFreeCursor(dpy, cursor[CurNormal]);
 54	XFreeCursor(dpy, cursor[CurResize]);
 55	XFreeCursor(dpy, cursor[CurMove]);
 56	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 57	XSync(dpy, False);
 58	free(seltag);
 59}
 60
 61static unsigned long
 62initcolor(const char *colstr) {
 63	Colormap cmap = DefaultColormap(dpy, screen);
 64	XColor color;
 65
 66	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 67		eprint("error, cannot allocate color '%s'\n", colstr);
 68	return color.pixel;
 69}
 70
 71static void
 72initfont(const char *fontstr) {
 73	char *def, **missing;
 74	int i, n;
 75
 76	missing = NULL;
 77	if(dc.font.set)
 78		XFreeFontSet(dpy, dc.font.set);
 79	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 80	if(missing) {
 81		while(n--)
 82			fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 83		XFreeStringList(missing);
 84	}
 85	if(dc.font.set) {
 86		XFontSetExtents *font_extents;
 87		XFontStruct **xfonts;
 88		char **font_names;
 89		dc.font.ascent = dc.font.descent = 0;
 90		font_extents = XExtentsOfFontSet(dc.font.set);
 91		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 92		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 93			if(dc.font.ascent < (*xfonts)->ascent)
 94				dc.font.ascent = (*xfonts)->ascent;
 95			if(dc.font.descent < (*xfonts)->descent)
 96				dc.font.descent = (*xfonts)->descent;
 97			xfonts++;
 98		}
 99	}
100	else {
101		if(dc.font.xfont)
102			XFreeFont(dpy, dc.font.xfont);
103		dc.font.xfont = NULL;
104		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
105			eprint("error, cannot load font: '%s'\n", fontstr);
106		dc.font.ascent = dc.font.xfont->ascent;
107		dc.font.descent = dc.font.xfont->descent;
108	}
109	dc.font.height = dc.font.ascent + dc.font.descent;
110}
111
112static void
113scan(void) {
114	unsigned int i, num;
115	Window *wins, d1, d2;
116	XWindowAttributes wa;
117
118	wins = NULL;
119	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
120		for(i = 0; i < num; i++) {
121			if(!XGetWindowAttributes(dpy, wins[i], &wa)
122			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
123				continue;
124			if(wa.map_state == IsViewable)
125				manage(wins[i], &wa);
126		}
127	}
128	if(wins)
129		XFree(wins);
130}
131
132static void
133setup(void) {
134	int i, j;
135	unsigned int mask;
136	Window w;
137	XModifierKeymap *modmap;
138	XSetWindowAttributes wa;
139
140	/* init atoms */
141	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
142	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
143	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
144	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
145	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
146	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
147			PropModeReplace, (unsigned char *) netatom, NetLast);
148	/* init cursors */
149	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
150	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
151	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
152	/* init modifier map */
153	numlockmask = 0;
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	bpos = BARPOS;
196	updatebarpos();
197	XMapRaised(dpy, barwin);
198	strcpy(stext, "dwm-"VERSION);
199	/* pixmap for everything */
200	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
201	dc.gc = XCreateGC(dpy, root, 0, 0);
202	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
203	if(!dc.font.set)
204		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
205	/* multihead support */
206	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
207}
208
209/*
210 * Startup Error handler to check if another window manager
211 * is already running.
212 */
213static int
214xerrorstart(Display *dsply, XErrorEvent *ee) {
215	otherwm = True;
216	return -1;
217}
218
219/* extern */
220
221void
222quit(const char *arg) {
223	readin = running = False;
224}
225
226void
227updatebarpos(void) {
228	XEvent ev;
229
230	wax = sx;
231	way = sy;
232	wah = sh;
233	waw = sw;
234	switch(bpos) {
235	default:
236		wah -= bh;
237		way += bh;
238		XMoveWindow(dpy, barwin, sx, sy);
239		break;
240	case BarBot:
241		wah -= bh;
242		XMoveWindow(dpy, barwin, sx, sy + wah);
243		break;
244	case BarOff:
245		XMoveWindow(dpy, barwin, sx, sy - bh);
246		break;
247	}
248	XSync(dpy, False);
249	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
250}
251
252/* There's no way to check accesses to destroyed windows, thus those cases are
253 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
254 * default error handler, which may call exit.
255 */
256int
257xerror(Display *dpy, XErrorEvent *ee) {
258	if(ee->error_code == BadWindow
259	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
260	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
261	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
262	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
263	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
264	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
265	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
266		return 0;
267	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
268		ee->request_code, ee->error_code);
269	return xerrorxlib(dpy, ee); /* may call exit */
270}
271
272int
273main(int argc, char *argv[]) {
274	char *p;
275	int r, xfd;
276	fd_set rd;
277	XEvent ev;
278
279	if(argc == 2 && !strcmp("-v", argv[1]))
280		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
281	else if(argc != 1)
282		eprint("usage: dwm [-v]\n");
283	setlocale(LC_CTYPE, "");
284	if(!(dpy = XOpenDisplay(0)))
285		eprint("dwm: cannot open display\n");
286	xfd = ConnectionNumber(dpy);
287	screen = DefaultScreen(dpy);
288	root = RootWindow(dpy, screen);
289	otherwm = False;
290	XSetErrorHandler(xerrorstart);
291	/* this causes an error if some other window manager is running */
292	XSelectInput(dpy, root, SubstructureRedirectMask);
293	XSync(dpy, False);
294	if(otherwm)
295		eprint("dwm: another window manager is already running\n");
296
297	XSync(dpy, False);
298	XSetErrorHandler(NULL);
299	xerrorxlib = XSetErrorHandler(xerror);
300	XSync(dpy, False);
301	setup();
302	drawstatus();
303	scan();
304
305	/* main event loop, also reads status text from stdin */
306	XSync(dpy, False);
307	readin = True;
308	while(running) {
309		FD_ZERO(&rd);
310		if(readin)
311			FD_SET(STDIN_FILENO, &rd);
312		FD_SET(xfd, &rd);
313		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
314			if(errno == EINTR)
315				continue;
316			eprint("select failed\n");
317		}
318		if(FD_ISSET(STDIN_FILENO, &rd)) {
319			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
320			case -1:
321				strncpy(stext, strerror(errno), sizeof stext - 1);
322				stext[sizeof stext - 1] = '\0';
323				readin = False;
324				break;
325			case 0:
326				strncpy(stext, "EOF", 4);
327				readin = False;
328				break;
329			default:
330				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
331				for(; p >= stext && *p != '\n'; --p);
332				if(p > stext)
333					strncpy(stext, p + 1, sizeof stext);
334			}
335			drawstatus();
336		}
337		while(XPending(dpy)) {
338			XNextEvent(dpy, &ev);
339			if(handler[ev.type])
340				(handler[ev.type])(&ev); /* call handler */
341		}
342	}
343	cleanup();
344	XCloseDisplay(dpy);
345	return 0;
346}