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];
 21int bh, bmw, screen, sx, sy, sw, sh, wax, way, waw, wah;
 22unsigned int master, nmaster, ntags, numlockmask;
 23Atom wmatom[WMLast], netatom[NetLast];
 24Bool running = True;
 25Bool *seltag;
 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			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 74				continue;
 75			if(wa.map_state == IsViewable)
 76				manage(wins[i], &wa);
 77		}
 78	}
 79	if(wins)
 80		XFree(wins);
 81}
 82
 83static void
 84setup(void) {
 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	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", 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]
109					== XKeysymToKeycode(dpy, XK_Num_Lock))
110				numlockmask = (1 << i);
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 + (TOPBAR ? 0 : sh - bh), sw, bh, 0,
144			DefaultDepth(dpy, screen), 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 + (TOPBAR ? bh : 0);
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
174void
175sendevent(Window w, Atom a, long value) {
176	XEvent e;
177
178	e.type = ClientMessage;
179	e.xclient.window = w;
180	e.xclient.message_type = a;
181	e.xclient.format = 32;
182	e.xclient.data.l[0] = value;
183	e.xclient.data.l[1] = CurrentTime;
184	XSendEvent(dpy, w, False, NoEventMask, &e);
185	XSync(dpy, False);
186}
187
188void
189quit(Arg *arg) {
190	readin = running = False;
191}
192
193/* There's no way to check accesses to destroyed windows, thus those cases are
194 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
195 * default error handler, which may call exit.
196 */
197int
198xerror(Display *dpy, XErrorEvent *ee) {
199	if(ee->error_code == BadWindow
200	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
201	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
202	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
203	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
204	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
205	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
206	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
207		return 0;
208	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
209		ee->request_code, ee->error_code);
210	return xerrorxlib(dpy, ee); /* may call exit */
211}
212
213int
214main(int argc, char *argv[]) {
215	char *p;
216	int r, xfd;
217	fd_set rd;
218
219	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
220		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
221		exit(EXIT_SUCCESS);
222	}
223	else if(argc != 1)
224		eprint("usage: dwm [-v]\n");
225	setlocale(LC_CTYPE, "");
226	dpy = XOpenDisplay(0);
227	if(!dpy)
228		eprint("dwm: cannot open display\n");
229	xfd = ConnectionNumber(dpy);
230	screen = DefaultScreen(dpy);
231	root = RootWindow(dpy, screen);
232	otherwm = False;
233	XSetErrorHandler(xerrorstart);
234	/* this causes an error if some other window manager is running */
235	XSelectInput(dpy, root, SubstructureRedirectMask);
236	XSync(dpy, False);
237	if(otherwm)
238		eprint("dwm: another window manager is already running\n");
239
240	XSync(dpy, False);
241	XSetErrorHandler(NULL);
242	xerrorxlib = XSetErrorHandler(xerror);
243	XSync(dpy, False);
244	setup();
245	drawstatus();
246	scan();
247
248	/* main event loop, also reads status text from stdin */
249	XSync(dpy, False);
250	procevent();
251	readin = True;
252	while(running) {
253		FD_ZERO(&rd);
254		if(readin)
255			FD_SET(STDIN_FILENO, &rd);
256		FD_SET(xfd, &rd);
257		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
258			if(errno == EINTR)
259				continue;
260			eprint("select failed\n");
261		}
262		if(FD_ISSET(STDIN_FILENO, &rd)) {
263			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
264			case -1:
265				strncpy(stext, strerror(errno), sizeof stext - 1);
266				stext[sizeof stext - 1] = '\0';
267				readin = False;
268				break;
269			case 0:
270				strncpy(stext, "EOF", 4);
271				readin = False;
272				break;
273			default:
274				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
275				for(; p >= stext && *p != '\n'; --p);
276				if(p > stext)
277					strncpy(stext, p + 1, sizeof stext);
278			}
279			drawstatus();
280		}
281		if(FD_ISSET(xfd, &rd))
282			procevent();
283	}
284	cleanup();
285	XCloseDisplay(dpy);
286	return 0;
287}