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 <sys/select.h>
 14#include <X11/cursorfont.h>
 15#include <X11/Xatom.h>
 16#include <X11/Xproto.h>
 17
 18
 19/* static */
 20
 21static int (*xerrorxlib)(Display *, XErrorEvent *);
 22static Bool otherwm;
 23
 24static void
 25cleanup()
 26{
 27	while(sel) {
 28		resize(sel, True, TopLeft);
 29		unmanage(sel);
 30	}
 31	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 32}
 33
 34static void
 35scan()
 36{
 37	unsigned int i, num;
 38	Window *wins, d1, d2;
 39	XWindowAttributes wa;
 40
 41	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 42		for(i = 0; i < num; i++) {
 43			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 44				continue;
 45			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 46				continue;
 47			if(wa.map_state == IsViewable)
 48				manage(wins[i], &wa);
 49		}
 50	}
 51	if(wins)
 52		XFree(wins);
 53}
 54
 55static int
 56win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
 57{
 58	int status, format;
 59	unsigned long res, extra;
 60	Atom real;
 61
 62	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
 63			&res, &extra, prop);
 64
 65	if(status != Success || *prop == 0) {
 66		return 0;
 67	}
 68	if(res == 0) {
 69		free((void *) *prop);
 70	}
 71	return res;
 72}
 73
 74/*
 75 * Startup Error handler to check if another window manager
 76 * is already running.
 77 */
 78static int
 79xerrorstart(Display *dsply, XErrorEvent *ee)
 80{
 81	otherwm = True;
 82	return -1;
 83}
 84
 85/* extern */
 86
 87char stext[1024];
 88/* CUSTOMIZE */
 89int tsel = Tdev; /* default tag */
 90/* END CUSTOMIZE */
 91int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
 92Atom wmatom[WMLast], netatom[NetLast];
 93Bool running = True;
 94Bool issel = True;
 95Client *clients = NULL;
 96Client *sel = NULL;
 97Cursor cursor[CurLast];
 98Display *dpy;
 99DC dc = {0};
100Window root, barwin;
101
102int
103getproto(Window w)
104{
105	int protos = 0;
106	int i;
107	long res;
108	unsigned char *protocols;
109
110	res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L, &protocols);
111	if(res <= 0) {
112		return protos;
113	}
114	for(i = 0; i < res; i++) {
115		if(protocols[i] == wmatom[WMDelete])
116			protos |= WM_PROTOCOL_DELWIN;
117	}
118	free((char *) protocols);
119	return protos;
120}
121
122void
123sendevent(Window w, Atom a, long value)
124{
125	XEvent e;
126
127	e.type = ClientMessage;
128	e.xclient.window = w;
129	e.xclient.message_type = a;
130	e.xclient.format = 32;
131	e.xclient.data.l[0] = value;
132	e.xclient.data.l[1] = CurrentTime;
133	XSendEvent(dpy, w, False, NoEventMask, &e);
134	XSync(dpy, False);
135}
136
137void
138quit(Arg *arg)
139{
140	running = False;
141}
142
143/*
144 * There's no way to check accesses to destroyed windows, thus those cases are
145 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
146 * default error handler, which calls exit().
147 */
148int
149xerror(Display *dpy, XErrorEvent *ee)
150{
151	if(ee->error_code == BadWindow
152	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
153	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
154	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
155	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
156	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
157	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
158		return 0;
159	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
160		ee->request_code, ee->error_code);
161	return xerrorxlib(dpy, ee); /* may call exit() */
162}
163
164int
165main(int argc, char *argv[])
166{
167	int i;
168	unsigned int mask;
169	fd_set rd;
170	Bool readin = True;
171	Window w;
172	XEvent ev;
173	XSetWindowAttributes wa;
174
175	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
176		fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
177		exit(EXIT_SUCCESS);
178	}
179	else if(argc != 1)
180		eprint("usage: dwm [-v]\n");
181
182	dpy = XOpenDisplay(0);
183	if(!dpy)
184		eprint("dwm: cannot connect X server\n");
185
186	screen = DefaultScreen(dpy);
187	root = RootWindow(dpy, screen);
188
189	/* check if another WM is already running */
190	otherwm = False;
191	XSetErrorHandler(xerrorstart);
192	/* this causes an error if some other WM is running */
193	XSelectInput(dpy, root, SubstructureRedirectMask);
194	XSync(dpy, False);
195
196	if(otherwm)
197		eprint("dwm: another window manager is already running\n");
198
199	XSetErrorHandler(NULL);
200	xerrorxlib = XSetErrorHandler(xerror);
201
202	/* init atoms */
203	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
204	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
205	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
206	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
207	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
208			PropModeReplace, (unsigned char *) netatom, NetLast);
209
210	/* init cursors */
211	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
212	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
213	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
214
215	grabkeys();
216
217	/* style */
218	dc.bg = getcolor(BGCOLOR);
219	dc.fg = getcolor(FGCOLOR);
220	dc.border = getcolor(BORDERCOLOR);
221	setfont(FONT);
222
223	sx = sy = 0;
224	sw = DisplayWidth(dpy, screen);
225	sh = DisplayHeight(dpy, screen);
226	mw = (sw * MASTERW) / 100;
227
228	wa.override_redirect = 1;
229	wa.background_pixmap = ParentRelative;
230	wa.event_mask = ButtonPressMask | ExposureMask;
231
232	bx = by = 0;
233	bw = sw;
234	dc.h = bh = dc.font.height + 4;
235	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
236			CopyFromParent, DefaultVisual(dpy, screen),
237			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
238	XDefineCursor(dpy, barwin, cursor[CurNormal]);
239	XMapRaised(dpy, barwin);
240
241	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
242	dc.gc = XCreateGC(dpy, root, 0, 0);
243	drawstatus();
244
245	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
246
247	wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
248	wa.cursor = cursor[CurNormal];
249	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
250
251	strcpy(stext, "dwm-"VERSION);
252	scan();
253
254	/* main event loop, reads status text from stdin as well */
255	while(running) {
256		FD_ZERO(&rd);
257		if(readin)
258			FD_SET(STDIN_FILENO, &rd);
259		FD_SET(ConnectionNumber(dpy), &rd);
260
261		i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);
262		if(i == -1 && errno == EINTR)
263			continue;
264		if(i < 0)
265			eprint("select failed\n");
266		else if(i > 0) {
267			if(FD_ISSET(ConnectionNumber(dpy), &rd)) {
268				while(XPending(dpy)) {
269					XNextEvent(dpy, &ev);
270					if(handler[ev.type])
271						(handler[ev.type])(&ev); /* call handler */
272				}
273			}
274			if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
275				readin = NULL != fgets(stext, sizeof(stext), stdin);
276				if(readin)
277					stext[strlen(stext) - 1] = 0;
278				else 
279					strcpy(stext, "broken pipe");
280				drawstatus();
281			}
282		}
283	}
284
285	cleanup();
286	XCloseDisplay(dpy);
287
288	return 0;
289}