1/* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  2 * See LICENSE file for license details.
  3 */
  4
  5#include "dwm.h"
  6#include <errno.h>
  7#include <stdio.h>
  8#include <stdlib.h>
  9#include <string.h>
 10#include <unistd.h>
 11#include <sys/select.h>
 12#include <X11/cursorfont.h>
 13#include <X11/keysym.h>
 14#include <X11/Xatom.h>
 15#include <X11/Xproto.h>
 16
 17/* extern */
 18
 19char stext[1024];
 20Bool *seltag;
 21int bx, by, bw, bh, bmw, masterd, screen, sx, sy, sw, sh, wax, way, waw, wah;
 22unsigned int master, ntags, numlockmask;
 23Atom wmatom[WMLast], netatom[NetLast];
 24Bool running = True;
 25Bool issel = True;
 26Client *clients = NULL;
 27Client *sel = NULL;
 28Client *stack = 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(void) {
 41	close(STDIN_FILENO);
 42	while(sel) {
 43		resize(sel, True, TopLeft);
 44		unmanage(sel);
 45	}
 46	if(dc.font.set)
 47		XFreeFontSet(dpy, dc.font.set);
 48	else
 49		XFreeFont(dpy, dc.font.xfont);
 50	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 51	XFreePixmap(dpy, dc.drawable);
 52	XFreeGC(dpy, dc.gc);
 53	XDestroyWindow(dpy, barwin);
 54	XFreeCursor(dpy, cursor[CurNormal]);
 55	XFreeCursor(dpy, cursor[CurResize]);
 56	XFreeCursor(dpy, cursor[CurMove]);
 57	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 58	XSync(dpy, False);
 59	free(seltag);
 60}
 61
 62static void
 63scan(void) {
 64	unsigned int i, num;
 65	Window *wins, d1, d2;
 66	XWindowAttributes wa;
 67
 68	wins = NULL;
 69	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 70		for(i = 0; i < num; i++) {
 71			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 72				continue;
 73			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 74				continue;
 75			if(wa.map_state == IsViewable)
 76				manage(wins[i], &wa);
 77		}
 78	}
 79	if(wins)
 80		XFree(wins);
 81}
 82
 83static void
 84setup(void) {
 85	int i, j;
 86	unsigned int mask;
 87	Window w;
 88	XModifierKeymap *modmap;
 89	XSetWindowAttributes wa;
 90
 91	/* init atoms */
 92	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 93	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 94	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 95	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 96	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 97			PropModeReplace, (unsigned char *) netatom, NetLast);
 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	/* init modifier map */
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	XFreeModifiermap(modmap);
111	/* select for events */
112	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
113		| EnterWindowMask | LeaveWindowMask;
114	wa.cursor = cursor[CurNormal];
115	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
116	grabkeys();
117	initrregs();
118	for(ntags = 0; tags[ntags]; ntags++);
119	seltag = emallocz(sizeof(Bool) * ntags);
120	seltag[0] = True;
121	/* style */
122	dc.norm[ColBG] = getcolor(NORMBGCOLOR);
123	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
124	dc.sel[ColBG] = getcolor(SELBGCOLOR);
125	dc.sel[ColFG] = getcolor(SELFGCOLOR);
126	dc.status[ColBG] = getcolor(STATUSBGCOLOR);
127	dc.status[ColFG] = getcolor(STATUSFGCOLOR);
128	setfont(FONT);
129	/* geometry */
130	bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ?  textw(TILESYMBOL) : textw(FLOATSYMBOL);
131	sx = sy = 0;
132	sw = DisplayWidth(dpy, screen);
133	sh = DisplayHeight(dpy, screen);
134	master = MASTER;
135	/* bar */
136	bx = sx;
137	by = sy;
138	bw = sw;
139	dc.h = bh = dc.font.height + 2;
140	wa.override_redirect = 1;
141	wa.background_pixmap = ParentRelative;
142	wa.event_mask = ButtonPressMask | ExposureMask;
143	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
144			CopyFromParent, DefaultVisual(dpy, screen),
145			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
146	XDefineCursor(dpy, barwin, cursor[CurNormal]);
147	XMapRaised(dpy, barwin);
148	strcpy(stext, "dwm-"VERSION);
149	/* windowarea */
150	wax = sx;
151	way = sy + bh;
152	wah = sh - bh;
153	waw = sw;
154	/* pixmap for everything */
155	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
156	dc.gc = XCreateGC(dpy, root, 0, 0);
157	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
158	/* multihead support */
159	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
160}
161
162/*
163 * Startup Error handler to check if another window manager
164 * is already running.
165 */
166static int
167xerrorstart(Display *dsply, XErrorEvent *ee) {
168	otherwm = True;
169	return -1;
170}
171
172/* extern */
173
174int
175getproto(Window w) {
176	int i, format, protos, status;
177	unsigned long extra, res;
178	Atom *protocols, real;
179
180	protos = 0;
181	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
182			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
183	if(status != Success || protocols == 0)
184		return protos;
185	for(i = 0; i < res; i++)
186		if(protocols[i] == wmatom[WMDelete])
187			protos |= PROTODELWIN;
188	free(protocols);
189	return protos;
190}
191
192void
193sendevent(Window w, Atom a, long value) {
194	XEvent e;
195
196	e.type = ClientMessage;
197	e.xclient.window = w;
198	e.xclient.message_type = a;
199	e.xclient.format = 32;
200	e.xclient.data.l[0] = value;
201	e.xclient.data.l[1] = CurrentTime;
202	XSendEvent(dpy, w, False, NoEventMask, &e);
203	XSync(dpy, False);
204}
205
206void
207quit(Arg *arg) {
208	readin = running = False;
209}
210
211/* There's no way to check accesses to destroyed windows, thus those cases are
212 * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
213 * default error handler, which may call exit.
214 */
215int
216xerror(Display *dpy, XErrorEvent *ee) {
217	if(ee->error_code == BadWindow
218	|| (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
219	|| (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
220	|| (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
221	|| (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
222	|| (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
223	|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
224	|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
225		return 0;
226	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
227		ee->request_code, ee->error_code);
228	return xerrorxlib(dpy, ee); /* may call exit */
229}
230
231int
232main(int argc, char *argv[]) {
233	char *p;
234	int r, xfd;
235	fd_set rd;
236
237	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
238		fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
239		exit(EXIT_SUCCESS);
240	}
241	else if(argc != 1)
242		eprint("usage: dwm [-v]\n");
243	dpy = XOpenDisplay(0);
244	if(!dpy)
245		eprint("dwm: cannot open display\n");
246	xfd = ConnectionNumber(dpy);
247	screen = DefaultScreen(dpy);
248	root = RootWindow(dpy, screen);
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	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	setup();
262	drawstatus();
263	scan();
264
265	/* main event loop, also reads status text from stdin */
266	XSync(dpy, False);
267	procevent();
268	readin = True;
269	while(running) {
270		FD_ZERO(&rd);
271		if(readin)
272			FD_SET(STDIN_FILENO, &rd);
273		FD_SET(xfd, &rd);
274		if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
275			if(errno == EINTR)
276				continue;
277			eprint("select failed\n");
278		}
279		if(FD_ISSET(STDIN_FILENO, &rd)) {
280			switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
281			case -1:
282				strncpy(stext, strerror(errno), sizeof stext - 1);
283				stext[sizeof stext - 1] = '\0';
284				readin = False;
285				break;
286			case 0:
287				strncpy(stext, "EOF", 4);
288				readin = False;
289				break;
290			default:
291				for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
292				for(p = stext + strlen(stext) - 1; p >= stext && *p != '\n'; --p);
293				if(p > stext)
294					strncpy(stext, p + 1, sizeof stext);
295			}
296			drawstatus();
297		}
298		if(FD_ISSET(xfd, &rd))
299			procevent();
300	}
301	cleanup();
302	XCloseDisplay(dpy);
303	return 0;
304}