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 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		if(stack->isbanned)
 45			XMoveWindow(dpy, stack->win, stack->x, stack->y);
 46		unmanage(stack);
 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	XFreeCursor(dpy, cursor[CurNormal]);
 57	XFreeCursor(dpy, cursor[CurResize]);
 58	XFreeCursor(dpy, cursor[CurMove]);
 59	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 60	XSync(dpy, False);
 61	free(seltag);
 62}
 63
 64static void
 65scan(void) {
 66	unsigned int i, num;
 67	Window *wins, d1, d2;
 68	XWindowAttributes wa;
 69
 70	wins = NULL;
 71	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 72		for(i = 0; i < num; i++) {
 73			if(!XGetWindowAttributes(dpy, wins[i], &wa)
 74			|| 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	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
 96	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 97	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 98	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 99			PropModeReplace, (unsigned char *) netatom, NetLast);
100	/* init cursors */
101	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
102	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
103	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
104	/* init modifier map */
105	numlockmask = 0;
106	modmap = XGetModifierMapping(dpy);
107	for (i = 0; i < 8; i++)
108		for (j = 0; j < modmap->max_keypermod; j++) {
109			if(modmap->modifiermap[i * modmap->max_keypermod + j]
110					== XKeysymToKeycode(dpy, XK_Num_Lock))
111				numlockmask = (1 << i);
112		}
113	XFreeModifiermap(modmap);
114	/* select for events */
115	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
116		| EnterWindowMask | LeaveWindowMask;
117	wa.cursor = cursor[CurNormal];
118	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
119	grabkeys();
120	compileregexps();
121	for(ntags = 0; tags[ntags]; ntags++);
122	seltag = emallocz(sizeof(Bool) * ntags);
123	seltag[0] = True;
124	/* style */
125	dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
126	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
127	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
128	dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
129	dc.sel[ColBG] = getcolor(SELBGCOLOR);
130	dc.sel[ColFG] = getcolor(SELFGCOLOR);
131	setfont(FONT);
132	/* geometry */
133	sx = sy = 0;
134	sw = DisplayWidth(dpy, screen);
135	sh = DisplayHeight(dpy, screen);
136	bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ? textw(TILESYMBOL) : textw(FLOATSYMBOL);
137	/* bar */
138	dc.h = bh = dc.font.height + 2;
139	wa.override_redirect = 1;
140	wa.background_pixmap = ParentRelative;
141	wa.event_mask = ButtonPressMask | ExposureMask;
142	barwin = XCreateWindow(dpy, root, sx, sy + (TOPBAR ? 0 : sh - bh), sw, bh, 0,
143			DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
144			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
145	XDefineCursor(dpy, barwin, cursor[CurNormal]);
146	XMapRaised(dpy, barwin);
147	strcpy(stext, "dwm-"VERSION);
148	/* windowarea */
149	wax = sx;
150	way = sy + (TOPBAR ? bh : 0);
151	wah = sh - bh;
152	waw = sw;
153	/* pixmap for everything */
154	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
155	dc.gc = XCreateGC(dpy, root, 0, 0);
156	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
157	/* multihead support */
158	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
159}
160
161/*
162 * Startup Error handler to check if another window manager
163 * is already running.
164 */
165static int
166xerrorstart(Display *dsply, XErrorEvent *ee) {
167	otherwm = True;
168	return -1;
169}
170
171/* extern */
172
173void
174sendevent(Window w, Atom a, long value) {
175	XEvent e;
176
177	e.type = ClientMessage;
178	e.xclient.window = w;
179	e.xclient.message_type = a;
180	e.xclient.format = 32;
181	e.xclient.data.l[0] = value;
182	e.xclient.data.l[1] = CurrentTime;
183	XSendEvent(dpy, w, False, NoEventMask, &e);
184	XSync(dpy, False);
185}
186
187void
188quit(Arg *arg) {
189	readin = running = False;
190}
191
192/* There's no way to check accesses to destroyed windows, thus those cases are
193 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
194 * default error handler, which may call exit.
195 */
196int
197xerror(Display *dpy, XErrorEvent *ee) {
198	if(ee->error_code == BadWindow
199	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
200	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
201	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
202	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
203	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
204	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
205	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
206		return 0;
207	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
208		ee->request_code, ee->error_code);
209	return xerrorxlib(dpy, ee); /* may call exit */
210}
211
212int
213main(int argc, char *argv[]) {
214	char *p;
215	int r, xfd;
216	fd_set rd;
217
218	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
219		fputs("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n", stdout);
220		exit(EXIT_SUCCESS);
221	}
222	else if(argc != 1)
223		eprint("usage: dwm [-v]\n");
224	setlocale(LC_CTYPE, "");
225	dpy = XOpenDisplay(0);
226	if(!dpy)
227		eprint("dwm: cannot open display\n");
228	xfd = ConnectionNumber(dpy);
229	screen = DefaultScreen(dpy);
230	root = RootWindow(dpy, screen);
231	otherwm = False;
232	XSetErrorHandler(xerrorstart);
233	/* this causes an error if some other window manager is running */
234	XSelectInput(dpy, root, SubstructureRedirectMask);
235	XSync(dpy, False);
236	if(otherwm)
237		eprint("dwm: another window manager is already running\n");
238
239	XSync(dpy, False);
240	XSetErrorHandler(NULL);
241	xerrorxlib = XSetErrorHandler(xerror);
242	XSync(dpy, False);
243	setup();
244	drawstatus();
245	scan();
246
247	/* main event loop, also reads status text from stdin */
248	XSync(dpy, False);
249	procevent();
250	readin = True;
251	while(running) {
252		FD_ZERO(&rd);
253		if(readin)
254			FD_SET(STDIN_FILENO, &rd);
255		FD_SET(xfd, &rd);
256		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
257			if(errno == EINTR)
258				continue;
259			eprint("select failed\n");
260		}
261		if(FD_ISSET(STDIN_FILENO, &rd)) {
262			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
263			case -1:
264				strncpy(stext, strerror(errno), sizeof stext - 1);
265				stext[sizeof stext - 1] = '\0';
266				readin = False;
267				break;
268			case 0:
269				strncpy(stext, "EOF", 4);
270				readin = False;
271				break;
272			default:
273				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
274				for(; p >= stext && *p != '\n'; --p);
275				if(p > stext)
276					strncpy(stext, p + 1, sizeof stext);
277			}
278			drawstatus();
279		}
280		if(FD_ISSET(xfd, &rd))
281			procevent();
282	}
283	cleanup();
284	XCloseDisplay(dpy);
285	return 0;
286}