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