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
 36int tsel = Tdev; /* default tag */
 37int screen, sx, sy, sw, sh, mw, th;
 38
 39DC dc = {0};
 40Client *clients = NULL;
 41Client *sel = NULL;
 42
 43static Bool other_wm_running;
 44static const char version[] =
 45	"dwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
 46static int (*x_error_handler) (Display *, XErrorEvent *);
 47
 48static void
 49usage() {	error("usage: dwm [-v]\n"); }
 50
 51static void
 52scan_wins()
 53{
 54	unsigned int i, num;
 55	Window *wins;
 56	XWindowAttributes wa;
 57	Window d1, d2;
 58
 59	if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 60		for(i = 0; i < num; i++) {
 61			if(!XGetWindowAttributes(dpy, wins[i], &wa))
 62				continue;
 63			if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
 64				continue;
 65			if(wa.map_state == IsViewable)
 66				manage(wins[i], &wa);
 67		}
 68	}
 69	if(wins)
 70		XFree(wins);
 71}
 72
 73static int
 74win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
 75{
 76	Atom real;
 77	int format;
 78	unsigned long res, extra;
 79	int status;
 80
 81	status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
 82			&res, &extra, prop);
 83
 84	if(status != Success || *prop == 0) {
 85		return 0;
 86	}
 87	if(res == 0) {
 88		free((void *) *prop);
 89	}
 90	return res;
 91}
 92
 93int
 94win_proto(Window w)
 95{
 96	unsigned char *protocols;
 97	long res;
 98	int protos = 0;
 99	int i;
100
101	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L, &protocols);
102	if(res <= 0) {
103		return protos;
104	}
105	for(i = 0; i < res; i++) {
106		if(protocols[i] == wm_atom[WMDelete])
107			protos |= WM_PROTOCOL_DELWIN;
108	}
109	free((char *) protocols);
110	return protos;
111}
112
113void
114send_message(Window w, Atom a, long value)
115{
116	XEvent e;
117
118	e.type = ClientMessage;
119	e.xclient.window = w;
120	e.xclient.message_type = a;
121	e.xclient.format = 32;
122	e.xclient.data.l[0] = value;
123	e.xclient.data.l[1] = CurrentTime;
124	XSendEvent(dpy, w, False, NoEventMask, &e);
125	XFlush(dpy);
126}
127
128/*
129 * There's no way to check accesses to destroyed windows, thus
130 * those cases are ignored (especially on UnmapNotify's).
131 * Other types of errors call Xlib's default error handler, which
132 * calls exit().
133 */
134int
135error_handler(Display *dpy, XErrorEvent *error)
136{
137	if(error->error_code == BadWindow
138			|| (error->request_code == X_SetInputFocus
139				&& error->error_code == BadMatch)
140			|| (error->request_code == X_PolyText8
141				&& error->error_code == BadDrawable)
142			|| (error->request_code == X_PolyFillRectangle
143				&& error->error_code == BadDrawable)
144			|| (error->request_code == X_PolySegment
145				&& error->error_code == BadDrawable)
146			|| (error->request_code == X_ConfigureWindow
147				&& error->error_code == BadMatch)
148			|| (error->request_code == X_GrabKey
149				&& error->error_code == BadAccess))
150		return 0;
151	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
152			error->request_code, error->error_code);
153	return x_error_handler(dpy, error); /* may call exit() */
154}
155
156/*
157 * Startup Error handler to check if another window manager
158 * is already running.
159 */
160static int
161startup_error_handler(Display *dpy, XErrorEvent *error)
162{
163	other_wm_running = True;
164	return -1;
165}
166
167static void
168cleanup()
169{
170	while(sel) {
171		resize(sel, True);
172		unmanage(sel);
173	}
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	mw = (sw * MASTERW) / 100;
226	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
227
228	XSetErrorHandler(0);
229	x_error_handler = XSetErrorHandler(error_handler);
230
231	/* init atoms */
232	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
233	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
234	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
235	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
236
237	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
238			PropModeReplace, (unsigned char *) net_atom, NetLast);
239
240
241	/* init cursors */
242	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
243	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
244	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
245
246	update_keys();
247
248	/* style */
249	dc.bg = initcolor(BGCOLOR);
250	dc.fg = initcolor(FGCOLOR);
251	dc.border = initcolor(BORDERCOLOR);
252	initfont(FONT);
253
254	th = dc.font.height + 4;
255
256	dc.drawable = XCreatePixmap(dpy, root, sw, th, DefaultDepth(dpy, screen));
257	dc.gc = XCreateGC(dpy, root, 0, 0);
258
259	wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
260					| LeaveWindowMask;
261	wa.cursor = cursor[CurNormal];
262	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
263
264	scan_wins();
265
266	while(running) {
267		XNextEvent(dpy, &ev);
268		if(handler[ev.type])
269			(handler[ev.type])(&ev); /* call handler */
270	}
271
272	cleanup();
273	XCloseDisplay(dpy);
274
275	return 0;
276}