1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5
  6#include "dwm.h"
  7#include <errno.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, mw, screen, sx, sy, sw, sh;
 23unsigned int ntags, numlockmask;
 24Atom wmatom[WMLast], netatom[NetLast];
 25Bool running = True;
 26Bool issel = True;
 27Bool maximized = False;
 28Client *clients = NULL;
 29Client *sel = 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()
 42{
 43	close(STDIN_FILENO);
 44	while(sel) {
 45		resize(sel, True, TopLeft);
 46		unmanage(sel);
 47	}
 48	if(dc.font.set)
 49		XFreeFontSet(dpy, dc.font.set);
 50	else
 51		XFreeFont(dpy, dc.font.xfont);
 52	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 53	XFreePixmap(dpy, dc.drawable);
 54	XFreeGC(dpy, dc.gc);
 55	XDestroyWindow(dpy, barwin);
 56	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 57	XSync(dpy, False);
 58}
 59
 60static void
 61scan()
 62{
 63	unsigned int i, num;
 64	Window *wins, d1, d2;
 65	XWindowAttributes wa;
 66
 67	wins = NULL;
 68	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 69		for(i = 0; i < num; i++) {
 70			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 71				continue;
 72			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 73				continue;
 74			if(wa.map_state == IsViewable)
 75				manage(wins[i], &wa);
 76		}
 77	}
 78	if(wins)
 79		XFree(wins);
 80}
 81
 82static void
 83setup()
 84{
 85	int i, j;
 86	unsigned int mask;
 87	Window w;
 88	XModifierKeymap *modmap;
 89	XSetWindowAttributes wa;
 90
 91	/* init atoms */
 92	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 93	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 94	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 95	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 96	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 97			PropModeReplace, (unsigned char *) netatom, NetLast);
 98
 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
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	XFree(modmap);
112
113	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
114	wa.cursor = cursor[CurNormal];
115	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
116
117	grabkeys();
118	initrregs();
119
120	for(ntags = 0; tags[ntags]; ntags++);
121	seltag = emallocz(sizeof(Bool) * ntags);
122	seltag[0] = True;
123
124	/* style */
125	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
126	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
127	dc.sel[ColBG] = getcolor(SELBGCOLOR);
128	dc.sel[ColFG] = getcolor(SELFGCOLOR);
129	dc.status[ColBG] = getcolor(STATUSBGCOLOR);
130	dc.status[ColFG] = getcolor(STATUSFGCOLOR);
131	setfont(FONT);
132
133	bmw = textw(FLOATSYMBOL) > textw(TILESYMBOL) ? textw(FLOATSYMBOL) : textw(TILESYMBOL);
134	sx = sy = 0;
135	sw = DisplayWidth(dpy, screen);
136	sh = DisplayHeight(dpy, screen);
137	mw = (sw * MASTERW) / 100;
138
139	bx = by = 0;
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
151	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
152	dc.gc = XCreateGC(dpy, root, 0, 0);
153	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
154
155	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
156	strcpy(stext, "dwm-"VERSION);
157}
158
159/*
160 * Startup Error handler to check if another window manager
161 * is already running.
162 */
163static int
164xerrorstart(Display *dsply, XErrorEvent *ee)
165{
166	otherwm = True;
167	return -1;
168}
169
170/* extern */
171
172int
173getproto(Window w)
174{
175	int i, format, protos, status;
176	unsigned long extra, res;
177	Atom *protocols, real;
178
179	protos = 0;
180	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
181			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
182	if(status != Success || protocols == 0)
183		return protos;
184	for(i = 0; i < res; i++)
185		if(protocols[i] == wmatom[WMDelete])
186			protos |= PROTODELWIN;
187	free(protocols);
188	return protos;
189}
190
191void
192sendevent(Window w, Atom a, long value)
193{
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{
209	readin = running = False;
210}
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 calls exit().
216 */
217int
218xerror(Display *dpy, XErrorEvent *ee)
219{
220	if(ee->error_code == BadWindow
221	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
222	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
223	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
224	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
225	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
226	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
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{
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 Anselm R. Garbe\n", stdout);
241		exit(EXIT_SUCCESS);
242	}
243	else if(argc != 1)
244		eprint("usage: dwm [-v]\n");
245
246	dpy = XOpenDisplay(0);
247	if(!dpy)
248		eprint("dwm: cannot open display\n");
249
250	xfd = ConnectionNumber(dpy);
251	screen = DefaultScreen(dpy);
252	root = RootWindow(dpy, screen);
253
254	otherwm = False;
255	XSetErrorHandler(xerrorstart);
256	/* this causes an error if some other window manager is running */
257	XSelectInput(dpy, root, SubstructureRedirectMask);
258	XSync(dpy, False);
259
260	if(otherwm)
261		eprint("dwm: another window manager is already running\n");
262
263	XSync(dpy, False);
264	XSetErrorHandler(NULL);
265	xerrorxlib = XSetErrorHandler(xerror);
266	XSync(dpy, False);
267
268	setup();
269	drawstatus();
270	scan();
271
272	/* main event loop, also reads status text from stdin */
273	XSync(dpy, False);
274	procevent();
275	readin = True;
276	while(running) {
277		FD_ZERO(&rd);
278		if(readin)
279			FD_SET(STDIN_FILENO, &rd);
280		FD_SET(xfd, &rd);
281		r = select(xfd + 1, &rd, NULL, NULL, NULL);
282		if((r == -1) && (errno == EINTR))
283			continue;
284		if(r > 0) {
285			if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
286				readin = NULL != fgets(stext, sizeof(stext), stdin);
287				if(readin)
288					stext[strlen(stext) - 1] = 0;
289				else 
290					strcpy(stext, "broken pipe");
291				drawstatus();
292			}
293		}
294		else if(r < 0)
295			eprint("select failed\n");
296		procevent();
297	}
298	cleanup();
299	XCloseDisplay(dpy);
300
301	return 0;
302}