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#include <string.h>
 10
 11#include <X11/cursorfont.h>
 12#include <X11/Xatom.h>
 13#include <X11/Xproto.h>
 14
 15#include "dwm.h"
 16
 17/********** CUSTOMIZE **********/
 18
 19char *tags[TLast] = {
 20	[Tscratch] = "scratch",
 21	[Tdev] = "dev",
 22	[Tirc] = "irc",
 23	[Twww] = "www",
 24	[Twork] = "work",
 25};
 26
 27/********** CUSTOMIZE **********/
 28
 29/* X structs */
 30Display *dpy;
 31Window root, barwin;
 32Atom wm_atom[WMLast], net_atom[NetLast];
 33Cursor cursor[CurLast];
 34Bool running = True;
 35Bool issel;
 36
 37int tsel = Tdev; /* default tag */
 38int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
 39char stext[1024];
 40
 41DC dc = {0};
 42Client *clients = NULL;
 43Client *sel = 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(sel) {
173		resize(sel, True);
174		unmanage(sel);
175	}
176	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
177}
178
179void
180quit(Arg *arg)
181{
182	running = False;
183}
184
185int
186main(int argc, char *argv[])
187{
188	int i;
189	XSetWindowAttributes wa;
190	unsigned int mask;
191	Window w;
192	XEvent ev;
193
194	/* command line args */
195	for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
196		switch (argv[i][1]) {
197		case 'v':
198			fprintf(stdout, "%s", version);
199			exit(0);
200			break;
201		default:
202			usage();
203			break;
204		}
205	}
206
207	dpy = XOpenDisplay(0);
208	if(!dpy)
209		error("dwm: cannot connect X server\n");
210
211	screen = DefaultScreen(dpy);
212	root = RootWindow(dpy, screen);
213
214	/* check if another WM is already running */
215	other_wm_running = False;
216	XSetErrorHandler(startup_error_handler);
217	/* this causes an error if some other WM is running */
218	XSelectInput(dpy, root, SubstructureRedirectMask);
219	XFlush(dpy);
220
221	if(other_wm_running)
222		error("dwm: another window manager is already running\n");
223
224	XSetErrorHandler(0);
225	x_error_handler = XSetErrorHandler(error_handler);
226
227	/* init atoms */
228	wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
229	wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
230	net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
231	net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
232	XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
233			PropModeReplace, (unsigned char *) net_atom, NetLast);
234
235	/* init cursors */
236	cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
237	cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
238	cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
239
240	update_keys();
241
242	/* style */
243	dc.bg = initcolor(BGCOLOR);
244	dc.fg = initcolor(FGCOLOR);
245	dc.border = initcolor(BORDERCOLOR);
246	initfont(FONT);
247
248	sx = sy = 0;
249	sw = DisplayWidth(dpy, screen);
250	sh = DisplayHeight(dpy, screen);
251	mw = (sw * MASTERW) / 100;
252
253	wa.override_redirect = 1;
254	wa.background_pixmap = ParentRelative;
255	wa.event_mask = ExposureMask;
256
257	bx = by = 0;
258	bw = sw;
259	dc.h = bh = dc.font.height + 4;
260	barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
261			CopyFromParent, DefaultVisual(dpy, screen),
262			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
263	XDefineCursor(dpy, barwin, cursor[CurNormal]);
264	XMapRaised(dpy, barwin);
265
266	issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
267
268	wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
269					| LeaveWindowMask;
270	wa.cursor = cursor[CurNormal];
271
272	XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
273
274	dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
275	dc.gc = XCreateGC(dpy, root, 0, 0);
276
277	strcpy(stext, "dwm-"VERSION);
278	scan_wins();
279	draw_bar();
280
281	while(running) {
282		XNextEvent(dpy, &ev);
283		if(handler[ev.type])
284			(handler[ev.type])(&ev); /* call handler */
285	}
286
287	cleanup();
288	XCloseDisplay(dpy);
289
290	return 0;
291}