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