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 bx, by, bw, bh, bmw, master, screen, sx, sy, sw, sh;
 23unsigned int ntags, numlockmask;
 24Atom wmatom[WMLast], netatom[NetLast];
 25Bool running = True;
 26Bool issel = True;
 27Client *clients = NULL;
 28Client *sel = NULL;
 29Client *stack = NULL;
 30Cursor cursor[CurLast];
 31Display *dpy;
 32DC dc = {0};
 33Window root, barwin;
 34
 35/* static */
 36
 37static int (*xerrorxlib)(Display *, XErrorEvent *);
 38static Bool otherwm, readin;
 39
 40static void
 41cleanup(void) {
 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	free(seltag);
 58}
 59
 60static void
 61scan(void) {
 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(void) {
 83	int i, j;
 84	unsigned int mask;
 85	Window w;
 86	XModifierKeymap *modmap;
 87	XSetWindowAttributes wa;
 88
 89	/* init atoms */
 90	wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
 91	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 92	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
 93	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 94	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 95			PropModeReplace, (unsigned char *) netatom, NetLast);
 96
 97	/* init cursors */
 98	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
 99	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
100	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
101
102	modmap = XGetModifierMapping(dpy);
103	for (i = 0; i < 8; i++) {
104		for (j = 0; j < modmap->max_keypermod; j++) {
105			if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
106				numlockmask = (1 << i);
107		}
108	}
109	XFree(modmap);
110
111	wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
112		| 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.norm[ColBG] = getcolor(NORMBGCOLOR);
125	dc.norm[ColFG] = getcolor(NORMFGCOLOR);
126	dc.sel[ColBG] = getcolor(SELBGCOLOR);
127	dc.sel[ColFG] = getcolor(SELFGCOLOR);
128	dc.status[ColBG] = getcolor(STATUSBGCOLOR);
129	dc.status[ColFG] = getcolor(STATUSFGCOLOR);
130	setfont(FONT);
131 
132	bmw = textw(VSTACKSYMBOL) > textw(BSTACKSYMBOL) ?
133		textw(VSTACKSYMBOL) : textw(BSTACKSYMBOL);
134	bmw = bmw > textw(FLOATSYMBOL) ?
135		bmw : textw(FLOATSYMBOL);
136	sx = sy = 0;
137	sw = DisplayWidth(dpy, screen);
138	sh = DisplayHeight(dpy, screen);
139	master = ((stackpos == StackBottom ? sh - bh : sw) * MASTER) / 100;
140
141	bx = by = 0;
142	bw = sw;
143	dc.h = bh = dc.font.height + 2;
144	wa.override_redirect = 1;
145	wa.background_pixmap = ParentRelative;
146	wa.event_mask = ButtonPressMask | ExposureMask;
147	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
148			CopyFromParent, DefaultVisual(dpy, screen),
149			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
150	XDefineCursor(dpy, barwin, cursor[CurNormal]);
151	XMapRaised(dpy, barwin);
152
153	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
154	dc.gc = XCreateGC(dpy, root, 0, 0);
155	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
156
157	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
158	strcpy(stext, "dwm-"VERSION);
159}
160
161/*
162 * Startup Error handler to check if another window manager
163 * is already running.
164 */
165static int
166xerrorstart(Display *dsply, XErrorEvent *ee) {
167	otherwm = True;
168	return -1;
169}
170
171/* extern */
172
173int
174getproto(Window w) {
175	int i, format, protos, status;
176	unsigned long extra, res;
177	Atom *protocols, real;
178
179	protos = 0;
180	status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
181			XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
182	if(status != Success || protocols == 0)
183		return protos;
184	for(i = 0; i < res; i++)
185		if(protocols[i] == wmatom[WMDelete])
186			protos |= PROTODELWIN;
187	free(protocols);
188	return protos;
189}
190
191void
192sendevent(Window w, Atom a, long value) {
193	XEvent e;
194
195	e.type = ClientMessage;
196	e.xclient.window = w;
197	e.xclient.message_type = a;
198	e.xclient.format = 32;
199	e.xclient.data.l[0] = value;
200	e.xclient.data.l[1] = CurrentTime;
201	XSendEvent(dpy, w, False, NoEventMask, &e);
202	XSync(dpy, False);
203}
204
205void
206quit(Arg *arg) {
207	readin = running = False;
208}
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	int r, xfd;
234	fd_set rd;
235
236	if(argc == 2 && !strncmp("-v", argv[1], 3)) {
237		fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
238		exit(EXIT_SUCCESS);
239	}
240	else if(argc != 1)
241		eprint("usage: dwm [-v]\n");
242
243	dpy = XOpenDisplay(0);
244	if(!dpy)
245		eprint("dwm: cannot open display\n");
246
247	xfd = ConnectionNumber(dpy);
248	screen = DefaultScreen(dpy);
249	root = RootWindow(dpy, screen);
250
251	otherwm = False;
252	XSetErrorHandler(xerrorstart);
253	/* this causes an error if some other window manager is running */
254	XSelectInput(dpy, root, SubstructureRedirectMask);
255	XSync(dpy, False);
256
257	if(otherwm)
258		eprint("dwm: another window manager is already running\n");
259
260	XSync(dpy, False);
261	XSetErrorHandler(NULL);
262	xerrorxlib = XSetErrorHandler(xerror);
263	XSync(dpy, False);
264
265	setup();
266	drawstatus();
267	scan();
268
269	/* main event loop, also reads status text from stdin */
270	XSync(dpy, False);
271	procevent();
272	readin = True;
273	while(running) {
274		FD_ZERO(&rd);
275		if(readin)
276			FD_SET(STDIN_FILENO, &rd);
277		FD_SET(xfd, &rd);
278		r = select(xfd + 1, &rd, NULL, NULL, NULL);
279		if((r == -1) && (errno == EINTR))
280			continue;
281		if(r > 0) {
282			if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
283				readin = NULL != fgets(stext, sizeof(stext), stdin);
284				if(readin)
285					stext[strlen(stext) - 1] = 0;
286				else 
287					strcpy(stext, "broken pipe");
288				drawstatus();
289			}
290		}
291		else if(r < 0)
292			eprint("select failed\n");
293		procevent();
294	}
295	cleanup();
296	XCloseDisplay(dpy);
297
298	return 0;
299}