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
  8#include <errno.h>
  9#include <stdio.h>
 10#include <stdlib.h>
 11#include <string.h>
 12#include <unistd.h>
 13#include <X11/cursorfont.h>
 14#include <X11/Xatom.h>
 15#include <X11/Xproto.h>
 16
 17
 18/* static */
 19
 20static int (*xerrorxlib)(Display *, XErrorEvent *);
 21static Bool otherwm;
 22
 23static void
 24cleanup()
 25{
 26	while(sel) {
 27		resize(sel, True, TopLeft);
 28		unmanage(sel);
 29	}
 30	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 31}
 32
 33static void
 34scan()
 35{
 36	unsigned int i, num;
 37	Window *wins, d1, d2;
 38	XWindowAttributes wa;
 39
 40	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 41		for(i = 0; i < num; i++) {
 42			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 43				continue;
 44			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 45				continue;
 46			if(wa.map_state == IsViewable)
 47				manage(wins[i], &wa);
 48		}
 49	}
 50	if(wins)
 51		XFree(wins);
 52}
 53
 54static int
 55win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
 56{
 57	int status, format;
 58	unsigned long res, extra;
 59	Atom real;
 60
 61	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
 62			&res, &extra, prop);
 63
 64	if(status != Success || *prop == 0) {
 65		return 0;
 66	}
 67	if(res == 0) {
 68		free((void *) *prop);
 69	}
 70	return res;
 71}
 72
 73/*
 74 * Startup Error handler to check if another window manager
 75 * is already running.
 76 */
 77static int
 78xerrorstart(Display *dsply, XErrorEvent *ee)
 79{
 80	otherwm = True;
 81	return -1;
 82}
 83
 84/* extern */
 85
 86char stext[1024];
 87/* CUSTOMIZE */
 88int tsel = Tdev; /* default tag */
 89/* END CUSTOMIZE */
 90int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
 91Atom wmatom[WMLast], netatom[NetLast];
 92Bool running = True;
 93Bool issel = True;
 94Client *clients = NULL;
 95Client *sel = NULL;
 96Cursor cursor[CurLast];
 97Display *dpy;
 98DC dc = {0};
 99Window root, barwin;
100
101int
102getproto(Window w)
103{
104	int protos = 0;
105	int i;
106	long res;
107	unsigned char *protocols;
108
109	res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L, &protocols);
110	if(res <= 0) {
111		return protos;
112	}
113	for(i = 0; i < res; i++) {
114		if(protocols[i] == wmatom[WMDelete])
115			protos |= WM_PROTOCOL_DELWIN;
116	}
117	free((char *) protocols);
118	return protos;
119}
120
121void
122sendevent(Window w, Atom a, long value)
123{
124	XEvent e;
125
126	e.type = ClientMessage;
127	e.xclient.window = w;
128	e.xclient.message_type = a;
129	e.xclient.format = 32;
130	e.xclient.data.l[0] = value;
131	e.xclient.data.l[1] = CurrentTime;
132	XSendEvent(dpy, w, False, NoEventMask, &e);
133	XSync(dpy, False);
134}
135
136void
137quit(Arg *arg)
138{
139	running = False;
140}
141
142/*
143 * There's no way to check accesses to destroyed windows, thus those cases are
144 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
145 * default error handler, which calls exit().
146 */
147int
148xerror(Display *dpy, XErrorEvent *ee)
149{
150	if(ee->error_code == BadWindow
151	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
152	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
153	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
154	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
155	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
156	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
157		return 0;
158	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
159		ee->request_code, ee->error_code);
160	return xerrorxlib(dpy, ee); /* may call exit() */
161}
162
163int
164main(int argc, char *argv[])
165{
166	int i, n;
167	unsigned int mask;
168	fd_set rd;
169	Bool readstdin = True;
170	Window w;
171	XEvent ev;
172	XSetWindowAttributes wa;
173
174	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
175		switch (argv[i][1]) {
176		default:
177			eprint("usage: dwm [-v]\n");
178			break;
179		case 'v':
180			fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
181			exit(EXIT_SUCCESS);
182			break;
183		}
184	}
185
186	dpy = XOpenDisplay(0);
187	if(!dpy)
188		eprint("dwm: cannot connect X server\n");
189
190	screen = DefaultScreen(dpy);
191	root = RootWindow(dpy, screen);
192
193	/* check if another WM is already running */
194	otherwm = False;
195	XSetErrorHandler(xerrorstart);
196	/* this causes an error if some other WM is running */
197	XSelectInput(dpy, root, SubstructureRedirectMask);
198	XSync(dpy, False);
199
200	if(otherwm)
201		eprint("dwm: another window manager is already running\n");
202
203	XSetErrorHandler(NULL);
204	xerrorxlib = XSetErrorHandler(xerror);
205
206	/* init atoms */
207	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
208	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
209	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
210	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
211	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
212			PropModeReplace, (unsigned char *) netatom, NetLast);
213
214	/* init cursors */
215	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
216	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
217	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
218
219	grabkeys();
220
221	/* style */
222	dc.bg = getcolor(BGCOLOR);
223	dc.fg = getcolor(FGCOLOR);
224	dc.border = getcolor(BORDERCOLOR);
225	setfont(FONT);
226
227	sx = sy = 0;
228	sw = DisplayWidth(dpy, screen);
229	sh = DisplayHeight(dpy, screen);
230	mw = (sw * MASTERW) / 100;
231
232	wa.override_redirect = 1;
233	wa.background_pixmap = ParentRelative;
234	wa.event_mask = ButtonPressMask | ExposureMask;
235
236	bx = by = 0;
237	bw = sw;
238	dc.h = bh = dc.font.height + 4;
239	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
240			CopyFromParent, DefaultVisual(dpy, screen),
241			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
242	XDefineCursor(dpy, barwin, cursor[CurNormal]);
243	XMapRaised(dpy, barwin);
244
245	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
246	dc.gc = XCreateGC(dpy, root, 0, 0);
247	drawstatus();
248
249	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
250
251	wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
252	wa.cursor = cursor[CurNormal];
253	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
254
255	strcpy(stext, "dwm-"VERSION);
256	scan();
257
258	/* main event loop, reads status text from stdin as well */
259Mainloop:
260	while(running) {
261		FD_ZERO(&rd);
262		if(readstdin)
263			FD_SET(STDIN_FILENO, &rd);
264		FD_SET(ConnectionNumber(dpy), &rd);
265
266		i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);
267		if(i == -1 && errno == EINTR)
268			continue;
269		if(i < 0)
270			eprint("select failed\n");
271		else if(i > 0) {
272			if(FD_ISSET(ConnectionNumber(dpy), &rd)) {
273				while(XPending(dpy)) {
274					XNextEvent(dpy, &ev);
275					if(handler[ev.type])
276						(handler[ev.type])(&ev); /* call handler */
277				}
278			}
279			if(readstdin && FD_ISSET(STDIN_FILENO, &rd)) {
280				i = n = 0;
281				for(;;) {
282					if((i = getchar()) == EOF) {
283						/* broken pipe/end of producer */
284						readstdin = False;
285						strcpy(stext, "broken pipe");
286						goto Mainloop;
287					}
288					if(i == '\n' || n >= sizeof(stext) - 1)
289						break;
290					stext[n++] = i;
291				}
292				stext[n] = 0;
293				drawstatus();
294			}
295		}
296	}
297
298	cleanup();
299	XCloseDisplay(dpy);
300
301	return 0;
302}