1/*
  2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5
  6#include <stdarg.h>
  7#include <stdio.h>
  8#include <stdlib.h>
  9
 10#include <X11/cursorfont.h>
 11#include <X11/Xatom.h>
 12#include <X11/Xproto.h>
 13
 14#include "dwm.h"
 15
 16/********** CUSTOMIZE **********/
 17
 18char *tags[TLast] = {
 19	[Tscratch] = "scratch",
 20	[Tdev] = "dev",
 21	[Tirc] = "irc",
 22	[Twww] = "www",
 23	[Twork] = "work",
 24};
 25
 26/********** CUSTOMIZE **********/
 27
 28/* X structs */
 29Display *dpy;
 30Window root, barwin;
 31Atom wm_atom[WMLast], net_atom[NetLast];
 32Cursor cursor[CurLast];
 33Bool running = True;
 34Bool issel;
 35
 36char stext[1024];
 37int tsel = Tdev; /* default tag */
 38int screen, sx, sy, sw, sh, th;
 39
 40DC dc = {0};
 41Client *cstart = NULL;
 42Client *cend = NULL;
 43Client *csel = NULL;
 44
 45static Bool other_wm_running;
 46static const char version[] =
 47	"dwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
 48static int (*x_error_handler) (Display *, XErrorEvent *);
 49
 50static void
 51usage() {	error("usage: dwm [-v]\n"); }
 52
 53static void
 54scan_wins()
 55{
 56	unsigned int i, num;
 57	Window *wins;
 58	XWindowAttributes wa;
 59	Window d1, d2;
 60
 61	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 62		for(i = 0; i < num; i++) {
 63			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 64				continue;
 65			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 66				continue;
 67			if(wa.map_state == IsViewable)
 68				manage(wins[i], &wa);
 69		}
 70	}
 71	if(wins)
 72		XFree(wins);
 73}
 74
 75static int
 76win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
 77{
 78	Atom real;
 79	int format;
 80	unsigned long res, extra;
 81	int status;
 82
 83	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
 84			&res, &extra, prop);
 85
 86	if(status != Success || *prop == 0) {
 87		return 0;
 88	}
 89	if(res == 0) {
 90		free((void *) *prop);
 91	}
 92	return res;
 93}
 94
 95int
 96win_proto(Window w)
 97{
 98	unsigned char *protocols;
 99	long res;
100	int protos = 0;
101	int i;
102
103	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L, &protocols);
104	if(res <= 0) {
105		return protos;
106	}
107	for(i = 0; i < res; i++) {
108		if(protocols[i] == wm_atom[WMDelete])
109			protos |= WM_PROTOCOL_DELWIN;
110	}
111	free((char *) protocols);
112	return protos;
113}
114
115void
116send_message(Window w, Atom a, long value)
117{
118	XEvent e;
119
120	e.type = ClientMessage;
121	e.xclient.window = w;
122	e.xclient.message_type = a;
123	e.xclient.format = 32;
124	e.xclient.data.l[0] = value;
125	e.xclient.data.l[1] = CurrentTime;
126	XSendEvent(dpy, w, False, NoEventMask, &e);
127	XFlush(dpy);
128}
129
130/*
131 * There's no way to check accesses to destroyed windows, thus
132 * those cases are ignored (especially on UnmapNotify's).
133 * Other types of errors call Xlib's default error handler, which
134 * calls exit().
135 */
136int
137error_handler(Display *dpy, XErrorEvent *error)
138{
139	if(error->error_code == BadWindow
140			|| (error->request_code == X_SetInputFocus
141				&& error->error_code == BadMatch)
142			|| (error->request_code == X_PolyText8
143				&& error->error_code == BadDrawable)
144			|| (error->request_code == X_PolyFillRectangle
145				&& error->error_code == BadDrawable)
146			|| (error->request_code == X_PolySegment
147				&& error->error_code == BadDrawable)
148			|| (error->request_code == X_ConfigureWindow
149				&& error->error_code == BadMatch)
150			|| (error->request_code == X_GrabKey
151				&& error->error_code == BadAccess))
152		return 0;
153	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
154			error->request_code, error->error_code);
155	return x_error_handler(dpy, error); /* may call exit() */
156}
157
158/*
159 * Startup Error handler to check if another window manager
160 * is already running.
161 */
162static int
163startup_error_handler(Display *dpy, XErrorEvent *error)
164{
165	other_wm_running = True;
166	return -1;
167}
168
169static void
170cleanup()
171{
172	while(csel)
173		unmanage(csel);
174	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
175}
176
177void
178quit(Arg *arg)
179{
180	running = False;
181}
182
183int
184main(int argc, char *argv[])
185{
186	int i;
187	XSetWindowAttributes wa;
188	unsigned int mask;
189	Window w;
190	XEvent ev;
191
192	/* command line args */
193	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
194		switch (argv[i][1]) {
195		case 'v':
196			fprintf(stdout, "%s", version);
197			exit(0);
198			break;
199		default:
200			usage();
201			break;
202		}
203	}
204
205	dpy = XOpenDisplay(0);
206	if(!dpy)
207		error("dwm: cannot connect X server\n");
208
209	screen = DefaultScreen(dpy);
210	root = RootWindow(dpy, screen);
211
212	/* check if another WM is already running */
213	other_wm_running = False;
214	XSetErrorHandler(startup_error_handler);
215	/* this causes an error if some other WM is running */
216	XSelectInput(dpy, root, SubstructureRedirectMask);
217	XFlush(dpy);
218
219	if(other_wm_running)
220		error("dwm: another window manager is already running\n");
221
222	sx = sy = 0;
223	sw = DisplayWidth(dpy, screen);
224	sh = DisplayHeight(dpy, screen);
225	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
226
227	XSetErrorHandler(0);
228	x_error_handler = XSetErrorHandler(error_handler);
229
230	/* init atoms */
231	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
232	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
233	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
234	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
235
236	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
237			PropModeReplace, (unsigned char *) net_atom, NetLast);
238
239
240	/* init cursors */
241	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
242	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
243	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
244
245	update_keys();
246
247	/* style */
248	dc.bg = initcolor(BGCOLOR);
249	dc.fg = initcolor(FGCOLOR);
250	dc.border = initcolor(BORDERCOLOR);
251	initfont(FONT);
252
253	th = dc.font.height + 4;
254
255	dc.drawable = XCreatePixmap(dpy, root, sw, th, DefaultDepth(dpy, screen));
256	dc.gc = XCreateGC(dpy, root, 0, 0);
257
258	wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
259					| LeaveWindowMask;
260	wa.cursor = cursor[CurNormal];
261	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
262
263	scan_wins();
264
265	while(running) {
266		XNextEvent(dpy, &ev);
267		if(handler[ev.type])
268			(handler[ev.type])(&ev); /* call handler */
269	}
270
271	cleanup();
272	XCloseDisplay(dpy);
273
274	return 0;
275}