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#include <errno.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[1024];
 21Bool *seltag;
 22int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
 23unsigned int ntags, numlockmask;
 24Atom wmatom[WMLast], netatom[NetLast];
 25Bool running = True;
 26Bool issel = True;
 27Client *clients = NULL;
 28Client *sel = NULL;
 29Cursor cursor[CurLast];
 30Display *dpy;
 31DC dc = {0};
 32Window root, barwin;
 33
 34/* static */
 35
 36static int (*xerrorxlib)(Display *, XErrorEvent *);
 37static Bool otherwm, readin;
 38
 39static void
 40cleanup()
 41{
 42	close(STDIN_FILENO);
 43	while(sel) {
 44		resize(sel, True, TopLeft);
 45		unmanage(sel);
 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	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 56	XSync(dpy, False);
 57}
 58
 59static void
 60scan()
 61{
 62	unsigned int i, num;
 63	Window *wins, d1, d2;
 64	XWindowAttributes wa;
 65
 66	wins = NULL;
 67	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 68		for(i = 0; i < num; i++) {
 69			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 70				continue;
 71			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 72				continue;
 73			if(wa.map_state == IsViewable)
 74				manage(wins[i], &wa);
 75		}
 76	}
 77	if(wins)
 78		XFree(wins);
 79}
 80
 81static void
 82setup()
 83{
 84	int i, j;
 85	unsigned int mask;
 86	Window w;
 87	XModifierKeymap *modmap;
 88	XSetWindowAttributes wa;
 89
 90	/* init atoms */
 91	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 92	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 93	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 94	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 95	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 96			PropModeReplace, (unsigned char *) netatom, NetLast);
 97
 98	/* init cursors */
 99	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
100	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
101	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
102
103	modmap = XGetModifierMapping(dpy);
104	for (i = 0; i < 8; i++) {
105		for (j = 0; j < modmap->max_keypermod; j++) {
106			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
107				numlockmask = (1 << i);
108		}
109	}
110	XFree(modmap);
111
112	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
113	wa.cursor = cursor[CurNormal];
114	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
115
116	grabkeys();
117	initrregs();
118
119	for(ntags = 0; tags[ntags]; ntags++);
120	seltag = emallocz(sizeof(Bool) * ntags);
121	seltag[0] = True;
122
123	/* style */
124	dc.bg[0] = getcolor(NORMBGCOLOR);
125	dc.fg[0] = getcolor(NORMFGCOLOR);
126	dc.bg[1] = getcolor(SELBGCOLOR);
127	dc.fg[1] = getcolor(SELFGCOLOR);
128	setfont(FONT);
129
130	sx = sy = 0;
131	sw = DisplayWidth(dpy, screen);
132	sh = DisplayHeight(dpy, screen);
133	mw = (sw * MASTERW) / 100;
134
135	bx = by = 0;
136	bw = sw;
137	dc.h = bh = dc.font.height + 4;
138	wa.override_redirect = 1;
139	wa.background_pixmap = ParentRelative;
140	wa.event_mask = ButtonPressMask | ExposureMask;
141	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
142			CopyFromParent, DefaultVisual(dpy, screen),
143			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
144	XDefineCursor(dpy, barwin, cursor[CurNormal]);
145	XMapRaised(dpy, barwin);
146
147	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
148	dc.gc = XCreateGC(dpy, root, 0, 0);
149	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
150
151	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
152	strcpy(stext, "dwm-"VERSION);
153}
154
155/*
156 * Startup Error handler to check if another window manager
157 * is already running.
158 */
159static int
160xerrorstart(Display *dsply, XErrorEvent *ee)
161{
162	otherwm = True;
163	return -1;
164}
165
166/* extern */
167
168int
169getproto(Window w)
170{
171	int i, format, protos, status;
172	unsigned long extra, res;
173	Atom *protocols, real;
174
175	protos = 0;
176	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
177			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
178	if(status != Success || protocols == 0)
179		return protos;
180	for(i = 0; i < res; i++)
181		if(protocols[i] == wmatom[WMDelete])
182			protos |= PROTODELWIN;
183	free(protocols);
184	return protos;
185}
186
187void
188sendevent(Window w, Atom a, long value)
189{
190	XEvent e;
191
192	e.type = ClientMessage;
193	e.xclient.window = w;
194	e.xclient.message_type = a;
195	e.xclient.format = 32;
196	e.xclient.data.l[0] = value;
197	e.xclient.data.l[1] = CurrentTime;
198	XSendEvent(dpy, w, False, NoEventMask, &e);
199	XSync(dpy, False);
200}
201
202void
203quit(Arg *arg)
204{
205	readin = running = False;
206}
207
208/*
209 * There's no way to check accesses to destroyed windows, thus those cases are
210 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
211 * default error handler, which calls exit().
212 */
213int
214xerror(Display *dpy, XErrorEvent *ee)
215{
216	if(ee->error_code == BadWindow
217	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
218	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
219	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
220	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
221	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
222	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
223		return 0;
224	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
225		ee->request_code, ee->error_code);
226	return xerrorxlib(dpy, ee); /* may call exit() */
227}
228
229int
230main(int argc, char *argv[])
231{
232	int r, xfd;
233	fd_set rd;
234
235	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
236		fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
237		exit(EXIT_SUCCESS);
238	}
239	else if(argc != 1)
240		eprint("usage: dwm [-v]\n");
241
242	dpy = XOpenDisplay(0);
243	if(!dpy)
244		eprint("dwm: cannot open display\n");
245
246	xfd = ConnectionNumber(dpy);
247	screen = DefaultScreen(dpy);
248	root = RootWindow(dpy, screen);
249
250	otherwm = False;
251	XSetErrorHandler(xerrorstart);
252	/* this causes an error if some other window manager is running */
253	XSelectInput(dpy, root, SubstructureRedirectMask);
254	XSync(dpy, False);
255
256	if(otherwm)
257		eprint("dwm: another window manager is already running\n");
258
259	XSync(dpy, False);
260	XSetErrorHandler(NULL);
261	xerrorxlib = XSetErrorHandler(xerror);
262	XSync(dpy, False);
263
264	setup();
265	drawstatus();
266	scan();
267
268	/* main event loop, also reads status text from stdin */
269	XSync(dpy, False);
270	procevent();
271	readin = True;
272	while(running) {
273		FD_ZERO(&rd);
274		if(readin)
275			FD_SET(STDIN_FILENO, &rd);
276		FD_SET(xfd, &rd);
277		r = select(xfd + 1, &rd, NULL, NULL, NULL);
278		if((r == -1) && (errno == EINTR))
279			continue;
280		if(r > 0) {
281			if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
282				readin = NULL != fgets(stext, sizeof(stext), stdin);
283				if(readin)
284					stext[strlen(stext) - 1] = 0;
285				else 
286					strcpy(stext, "broken pipe");
287				drawstatus();
288			}
289		}
290		else if(r < 0)
291			eprint("select failed\n");
292		procevent();
293	}
294	cleanup();
295	XCloseDisplay(dpy);
296
297	return 0;
298}