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 = getcolor(BGCOLOR);
125	dc.fg = getcolor(FGCOLOR);
126	dc.border = getcolor(BORDERCOLOR);
127	setfont(FONT);
128
129	sx = sy = 0;
130	sw = DisplayWidth(dpy, screen);
131	sh = DisplayHeight(dpy, screen);
132	mw = (sw * MASTERW) / 100;
133
134	bx = by = 0;
135	bw = sw;
136	dc.h = bh = dc.font.height + 4;
137	wa.override_redirect = 1;
138	wa.background_pixmap = ParentRelative;
139	wa.event_mask = ButtonPressMask | ExposureMask;
140	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
141			CopyFromParent, DefaultVisual(dpy, screen),
142			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
143	XDefineCursor(dpy, barwin, cursor[CurNormal]);
144	XMapRaised(dpy, barwin);
145
146	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
147	dc.gc = XCreateGC(dpy, root, 0, 0);
148	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
149
150	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
151	strcpy(stext, "dwm-"VERSION);
152}
153
154/*
155 * Startup Error handler to check if another window manager
156 * is already running.
157 */
158static int
159xerrorstart(Display *dsply, XErrorEvent *ee)
160{
161	otherwm = True;
162	return -1;
163}
164
165/* extern */
166
167int
168getproto(Window w)
169{
170	int i, format, protos, status;
171	unsigned long extra, res;
172	Atom *protocols, real;
173
174	protos = 0;
175	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
176			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
177	if(status != Success || protocols == 0)
178		return protos;
179	for(i = 0; i < res; i++)
180		if(protocols[i] == wmatom[WMDelete])
181			protos |= PROTODELWIN;
182	free(protocols);
183	return protos;
184}
185
186void
187sendevent(Window w, Atom a, long value)
188{
189	XEvent e;
190
191	e.type = ClientMessage;
192	e.xclient.window = w;
193	e.xclient.message_type = a;
194	e.xclient.format = 32;
195	e.xclient.data.l[0] = value;
196	e.xclient.data.l[1] = CurrentTime;
197	XSendEvent(dpy, w, False, NoEventMask, &e);
198	XSync(dpy, False);
199}
200
201void
202quit(Arg *arg)
203{
204	readin = running = False;
205}
206
207/*
208 * There's no way to check accesses to destroyed windows, thus those cases are
209 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
210 * default error handler, which calls exit().
211 */
212int
213xerror(Display *dpy, XErrorEvent *ee)
214{
215	if(ee->error_code == BadWindow
216	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
217	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
218	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
219	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
220	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
221	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
222		return 0;
223	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
224		ee->request_code, ee->error_code);
225	return xerrorxlib(dpy, ee); /* may call exit() */
226}
227
228int
229main(int argc, char *argv[])
230{
231	int r, xfd;
232	fd_set rd;
233
234	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
235		fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
236		exit(EXIT_SUCCESS);
237	}
238	else if(argc != 1)
239		eprint("usage: dwm [-v]\n");
240
241	dpy = XOpenDisplay(0);
242	if(!dpy)
243		eprint("dwm: cannot open display\n");
244
245	xfd = ConnectionNumber(dpy);
246	screen = DefaultScreen(dpy);
247	root = RootWindow(dpy, screen);
248
249	otherwm = False;
250	XSetErrorHandler(xerrorstart);
251	/* this causes an error if some other window manager is running */
252	XSelectInput(dpy, root, SubstructureRedirectMask);
253	XSync(dpy, False);
254
255	if(otherwm)
256		eprint("dwm: another window manager is already running\n");
257
258	XSync(dpy, False);
259	XSetErrorHandler(NULL);
260	xerrorxlib = XSetErrorHandler(xerror);
261	XSync(dpy, False);
262
263	setup();
264	drawstatus();
265	scan();
266
267	/* main event loop, also reads status text from stdin */
268	XSync(dpy, False);
269	procevent();
270	readin = True;
271	while(running) {
272		FD_ZERO(&rd);
273		if(readin)
274			FD_SET(STDIN_FILENO, &rd);
275		FD_SET(xfd, &rd);
276		r = select(xfd + 1, &rd, NULL, NULL, NULL);
277		if((r == -1) && (errno == EINTR))
278			continue;
279		if(r > 0) {
280			if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
281				readin = NULL != fgets(stext, sizeof(stext), stdin);
282				if(readin)
283					stext[strlen(stext) - 1] = 0;
284				else 
285					strcpy(stext, "broken pipe");
286				drawstatus();
287			}
288		}
289		else if(r < 0)
290			eprint("select failed\n");
291		procevent();
292	}
293	cleanup();
294	XCloseDisplay(dpy);
295
296	return 0;
297}