f247372d4398394fd2557511dc1d9c7ccdaf0d76
[dwm.git] / wm.c
1 /*
2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
3 * See LICENSE file for license details.
4 */
5
6 #include <errno.h>
7
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11
12 #include <sys/types.h>
13 #include <sys/time.h>
14
15 #include <X11/cursorfont.h>
16 #include <X11/Xatom.h>
17 #include <X11/Xproto.h>
18
19 #include "wm.h"
20
21 /* X structs */
22 Display *dpy;
23 Window root, barwin;
24 Atom wm_atom[WMLast], net_atom[NetLast];
25 Cursor cursor[CurLast];
26 XRectangle rect, barrect;
27 Bool running = True;
28 Bool sel_screen;
29
30 char *bartext, tag[256];
31 int screen;
32
33 Brush brush = {0};
34 Client *clients = NULL;
35 Client *stack = NULL;
36
37 static Bool other_wm_running;
38 static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
39 static int (*x_error_handler) (Display *, XErrorEvent *);
40
41 static void
42 usage()
43 {
44 fputs("usage: gridwm [-v]\n", stderr);
45 exit(1);
46 }
47
48 static void
49 scan_wins()
50 {
51 unsigned int i, num;
52 Window *wins;
53 XWindowAttributes wa;
54 Window d1, d2;
55
56 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
57 for(i = 0; i < num; i++) {
58 if(!XGetWindowAttributes(dpy, wins[i], &wa))
59 continue;
60 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
61 continue;
62 if(wa.map_state == IsViewable)
63 manage(wins[i], &wa);
64 }
65 }
66 if(wins)
67 XFree(wins);
68 }
69
70 static int
71 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
72 {
73 Atom real;
74 int format;
75 unsigned long res, extra;
76 int status;
77
78 status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
79 &res, &extra, prop);
80
81 if(status != Success || *prop == 0) {
82 return 0;
83 }
84 if(res == 0) {
85 free((void *) *prop);
86 }
87 return res;
88 }
89
90 int
91 win_proto(Window w)
92 {
93 Atom *protocols;
94 long res;
95 int protos = 0;
96 int i;
97
98 res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
99 ((unsigned char **) &protocols));
100 if(res <= 0) {
101 return protos;
102 }
103 for(i = 0; i < res; i++) {
104 if(protocols[i] == wm_atom[WMDelete])
105 protos |= WM_PROTOCOL_DELWIN;
106 }
107 free((char *) protocols);
108 return protos;
109 }
110
111 void
112 send_message(Window w, Atom a, long value)
113 {
114 XEvent e;
115
116 e.type = ClientMessage;
117 e.xclient.window = w;
118 e.xclient.message_type = a;
119 e.xclient.format = 32;
120 e.xclient.data.l[0] = value;
121 e.xclient.data.l[1] = CurrentTime;
122 XSendEvent(dpy, w, False, NoEventMask, &e);
123 XFlush(dpy);
124 }
125
126 /*
127 * There's no way to check accesses to destroyed windows, thus
128 * those cases are ignored (especially on UnmapNotify's).
129 * Other types of errors call Xlib's default error handler, which
130 * calls exit().
131 */
132 int
133 error_handler(Display *dpy, XErrorEvent *error)
134 {
135 if(error->error_code == BadWindow
136 || (error->request_code == X_SetInputFocus
137 && error->error_code == BadMatch)
138 || (error->request_code == X_PolyText8
139 && error->error_code == BadDrawable)
140 || (error->request_code == X_PolyFillRectangle
141 && error->error_code == BadDrawable)
142 || (error->request_code == X_PolySegment
143 && error->error_code == BadDrawable)
144 || (error->request_code == X_ConfigureWindow
145 && error->error_code == BadMatch)
146 || (error->request_code == X_GrabKey
147 && error->error_code == BadAccess))
148 return 0;
149 fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
150 error->request_code, error->error_code);
151 return x_error_handler(dpy, error); /* may call exit() */
152 }
153
154 /*
155 * Startup Error handler to check if another window manager
156 * is already running.
157 */
158 static int
159 startup_error_handler(Display *dpy, XErrorEvent *error)
160 {
161 other_wm_running = True;
162 return -1;
163 }
164
165 static void
166 cleanup()
167 {
168 while(clients)
169 unmanage(clients);
170 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
171 }
172
173 int
174 main(int argc, char *argv[])
175 {
176 int i;
177 XSetWindowAttributes wa;
178 unsigned int mask;
179 Window w;
180 XEvent ev;
181 fd_set fds;
182 struct timeval t, timeout = {
183 .tv_usec = 0,
184 .tv_sec = STATUSDELAY,
185 };
186
187 /* command line args */
188 for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
189 switch (argv[i][1]) {
190 case 'v':
191 fprintf(stdout, "%s", version);
192 exit(0);
193 break;
194 default:
195 usage();
196 break;
197 }
198 }
199
200 dpy = XOpenDisplay(0);
201 if(!dpy)
202 error("gridwm: cannot connect X server\n");
203
204 screen = DefaultScreen(dpy);
205 root = RootWindow(dpy, screen);
206
207 /* check if another WM is already running */
208 other_wm_running = False;
209 XSetErrorHandler(startup_error_handler);
210 /* this causes an error if some other WM is running */
211 XSelectInput(dpy, root, SubstructureRedirectMask);
212 XFlush(dpy);
213
214 if(other_wm_running)
215 error("gridwm: another window manager is already running\n");
216
217 rect.x = rect.y = 0;
218 rect.width = DisplayWidth(dpy, screen);
219 rect.height = DisplayHeight(dpy, screen);
220 sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
221
222 XSetErrorHandler(0);
223 x_error_handler = XSetErrorHandler(error_handler);
224
225 /* init atoms */
226 wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
227 wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
228 net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
229 net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
230
231 XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
232 PropModeReplace, (unsigned char *) net_atom, NetLast);
233
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 brush.drawable = XCreatePixmap(dpy, root, rect.width, rect.height,
243 DefaultDepth(dpy, screen));
244 brush.gc = XCreateGC(dpy, root, 0, 0);
245
246 /* style */
247 loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
248 loadfont(dpy, &brush.font, FONT);
249
250 wa.override_redirect = 1;
251 wa.background_pixmap = ParentRelative;
252 wa.event_mask = ExposureMask;
253
254 barrect = rect;
255 barrect.height = labelheight(&brush.font);
256 barrect.y = rect.height - barrect.height;
257 barwin = XCreateWindow(dpy, root, barrect.x, barrect.y,
258 barrect.width, barrect.height, 0, DefaultDepth(dpy, screen),
259 CopyFromParent, DefaultVisual(dpy, screen),
260 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
261 bartext = NULL;
262 XDefineCursor(dpy, barwin, cursor[CurNormal]);
263 XMapRaised(dpy, barwin);
264 draw_bar();
265
266 wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
267 | LeaveWindowMask;
268 wa.cursor = cursor[CurNormal];
269 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
270
271 scan_wins();
272
273 while(running) {
274 if(XPending(dpy) > 0) {
275 XNextEvent(dpy, &ev);
276 if(handler[ev.type])
277 (handler[ev.type]) (&ev); /* call handler */
278 continue;
279 }
280 FD_ZERO(&fds);
281 FD_SET(ConnectionNumber(dpy), &fds);
282 t = timeout;
283 if(select(ConnectionNumber(dpy) + 1, &fds, NULL, NULL, &t) > 0)
284 continue;
285 else if(errno != EINTR)
286 draw_bar();
287 }
288
289 cleanup();
290 XCloseDisplay(dpy);
291
292 return 0;
293 }