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#include <X11/Xutil.h>
 15
 16/* extern */
 17
 18char stext[256];
 19int screen, sx, sy, sw, sh, wax, way, waw, wah;
 20unsigned int ntags;
 21unsigned int numlockmask = 0;
 22Atom wmatom[WMLast], netatom[NetLast];
 23Bool *seltags;
 24Bool selscreen = True;
 25Client *clients = NULL;
 26Client *sel = NULL;
 27Client *stack = NULL;
 28Cursor cursor[CurLast];
 29Display *dpy;
 30Window root;
 31
 32/* static */
 33
 34static int (*xerrorxlib)(Display *, XErrorEvent *);
 35static Bool otherwm, readin;
 36static Bool running = True;
 37
 38static void
 39cleanup(void) {
 40	close(STDIN_FILENO);
 41	while(stack) {
 42		unban(stack);
 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(seltags);
 59}
 60
 61static long
 62getstate(Window w) {
 63	int format, status;
 64	long result = -1;
 65	unsigned char *p = NULL;
 66	unsigned long n, extra;
 67	Atom real;
 68
 69	status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 70			&real, &format, &n, &extra, (unsigned char **)&p);
 71	if(status != Success)
 72		return -1;
 73	if(n != 0)
 74		result = *p;
 75	XFree(p);
 76	return result;
 77}
 78
 79static void
 80scan(void) {
 81	unsigned int i, num;
 82	Window *wins, d1, d2;
 83	XWindowAttributes wa;
 84
 85	wins = NULL;
 86	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 87		for(i = 0; i < num; i++) {
 88			if(!XGetWindowAttributes(dpy, wins[i], &wa)
 89			|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 90				continue;
 91			if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
 92				manage(wins[i], &wa);
 93		}
 94		for(i = 0; i < num; i++) { /* now the transients */
 95			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 96				continue;
 97			if(XGetTransientForHint(dpy, wins[i], &d1)
 98			&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
 99				manage(wins[i], &wa);
100		}
101	}
102	if(wins)
103		XFree(wins);
104}
105
106static void
107setup(void) {
108	int i, j;
109	unsigned int mask;
110	Window w;
111	XModifierKeymap *modmap;
112	XSetWindowAttributes wa;
113
114	/* init atoms */
115	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
116	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
117	wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
118	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
119	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
120	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
121	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
122			PropModeReplace, (unsigned char *) netatom, NetLast);
123	/* init cursors */
124	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
125	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
126	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
127	/* init modifier map */
128	modmap = XGetModifierMapping(dpy);
129	for (i = 0; i < 8; i++)
130		for (j = 0; j < modmap->max_keypermod; j++) {
131			if(modmap->modifiermap[i * modmap->max_keypermod + j]
132					== XKeysymToKeycode(dpy, XK_Num_Lock))
133				numlockmask = (1 << i);
134		}
135	XFreeModifiermap(modmap);
136	/* select for events */
137	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
138		| EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
139	wa.cursor = cursor[CurNormal];
140	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
141	XSelectInput(dpy, root, wa.event_mask);
142	grabkeys();
143	compileregs();
144	for(ntags = 0; tags[ntags]; ntags++);
145	seltags = emallocz(sizeof(Bool) * ntags);
146	seltags[0] = True;
147	/* geometry */
148	sx = sy = 0;
149	sw = DisplayWidth(dpy, screen);
150	sh = DisplayHeight(dpy, screen);
151	initlayouts();
152	initbar();
153	/* multihead support */
154	selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
155}
156
157/*
158 * Startup Error handler to check if another window manager
159 * is already running.
160 */
161static int
162xerrorstart(Display *dsply, XErrorEvent *ee) {
163	otherwm = True;
164	return -1;
165}
166
167/* extern */
168
169Bool
170gettextprop(Window w, Atom atom, char *text, unsigned int size) {
171	char **list = NULL;
172	int n;
173	XTextProperty name;
174
175	if(!text || size == 0)
176		return False;
177	text[0] = '\0';
178	XGetTextProperty(dpy, w, &name, atom);
179	if(!name.nitems)
180		return False;
181	if(name.encoding == XA_STRING)
182		strncpy(text, (char *)name.value, size - 1);
183	else {
184		if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
185		&& n > 0 && *list)
186		{
187			strncpy(text, *list, size - 1);
188			XFreeStringList(list);
189		}
190	}
191	text[size - 1] = '\0';
192	XFree(name.value);
193	return True;
194}
195
196void
197quit(const char *arg) {
198	readin = running = False;
199}
200
201/* There's no way to check accesses to destroyed windows, thus those cases are
202 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
203 * default error handler, which may call exit.
204 */
205int
206xerror(Display *dpy, XErrorEvent *ee) {
207	if(ee->error_code == BadWindow
208	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
209	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
210	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
211	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
212	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
213	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
214	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
215		return 0;
216	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
217		ee->request_code, ee->error_code);
218	return xerrorxlib(dpy, ee); /* may call exit */
219}
220
221int
222main(int argc, char *argv[]) {
223	char *p;
224	int r, xfd;
225	fd_set rd;
226	XEvent ev;
227
228	if(argc == 2 && !strcmp("-v", argv[1]))
229		eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
230	else if(argc != 1)
231		eprint("usage: dwm [-v]\n");
232	setlocale(LC_CTYPE, "");
233	if(!(dpy = XOpenDisplay(0)))
234		eprint("dwm: cannot open display\n");
235	xfd = ConnectionNumber(dpy);
236	screen = DefaultScreen(dpy);
237	root = RootWindow(dpy, screen);
238	otherwm = False;
239	XSetErrorHandler(xerrorstart);
240	/* this causes an error if some other window manager is running */
241	XSelectInput(dpy, root, SubstructureRedirectMask);
242	XSync(dpy, False);
243	if(otherwm)
244		eprint("dwm: another window manager is already running\n");
245
246	XSync(dpy, False);
247	XSetErrorHandler(NULL);
248	xerrorxlib = XSetErrorHandler(xerror);
249	XSync(dpy, False);
250	setup();
251	drawbar();
252	scan();
253
254	/* main event loop, also reads status text from stdin */
255	XSync(dpy, False);
256	readin = True;
257	while(running) {
258		FD_ZERO(&rd);
259		if(readin)
260			FD_SET(STDIN_FILENO, &rd);
261		FD_SET(xfd, &rd);
262		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
263			if(errno == EINTR)
264				continue;
265			eprint("select failed\n");
266		}
267		if(FD_ISSET(STDIN_FILENO, &rd)) {
268			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
269			case -1:
270				strncpy(stext, strerror(errno), sizeof stext - 1);
271				stext[sizeof stext - 1] = '\0';
272				readin = False;
273				break;
274			case 0:
275				strncpy(stext, "EOF", 4);
276				readin = False;
277				break;
278			default:
279				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
280				for(; p >= stext && *p != '\n'; --p);
281				if(p > stext)
282					strncpy(stext, p + 1, sizeof stext);
283			}
284			drawbar();
285		}
286		while(XPending(dpy)) {
287			XNextEvent(dpy, &ev);
288			if(handler[ev.type])
289				(handler[ev.type])(&ev); /* call handler */
290		}
291	}
292	cleanup();
293	XCloseDisplay(dpy);
294	return 0;
295}