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removed ungrabkeys again (because of sander's mail)
[dwm.git] / main.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 "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/Xatom.h>
15 #include <X11/Xproto.h>
16
17 /* static */
18
19 static int (*xerrorxlib)(Display *, XErrorEvent *);
20 static Bool otherwm;
21
22 static void
23 cleanup()
24 {
25         while(sel) {
26                 resize(sel, True, TopLeft);
27                 unmanage(sel);
28         }
29         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
30 }
31
32 static void
33 scan()
34 {
35         unsigned int i, num;
36         Window *wins, d1, d2;
37         XWindowAttributes wa;
38
39         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
40                 for(i = 0; i < num; i++) {
41                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
42                                 continue;
43                         if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
44                                 continue;
45                         if(wa.map_state == IsViewable)
46                                 manage(wins[i], &wa);
47                 }
48         }
49         if(wins)
50                 XFree(wins);
51 }
52
53 static int
54 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
55 {
56         int status, format;
57         unsigned long res, extra;
58         Atom real;
59
60         status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
61                         &res, &extra, prop);
62
63         if(status != Success || *prop == 0) {
64                 return 0;
65         }
66         if(res == 0) {
67                 free((void *) *prop);
68         }
69         return res;
70 }
71
72 /*
73  * Startup Error handler to check if another window manager
74  * is already running.
75  */
76 static int
77 xerrorstart(Display *dsply, XErrorEvent *ee)
78 {
79         otherwm = True;
80         return -1;
81 }
82
83 /* extern */
84
85 char stext[1024];
86 Bool *seltag;
87 int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
88 unsigned int ntags;
89 Atom wmatom[WMLast], netatom[NetLast];
90 Bool running = True;
91 Bool issel = True;
92 Client *clients = NULL;
93 Client *sel = NULL;
94 Cursor cursor[CurLast];
95 Display *dpy;
96 DC dc = {0};
97 Window root, barwin;
98
99 int
100 getproto(Window w)
101 {
102         int protos = 0;
103         int i;
104         long res;
105         Atom *protocols;
106
107         res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L,
108                         ((unsigned char **)&protocols));
109         if(res <= 0) {
110                 return protos;
111         }
112         for(i = 0; i < res; i++) {
113                 if(protocols[i] == wmatom[WMDelete])
114                         protos |= PROTODELWIN;
115         }
116         free((char *) protocols);
117         return protos;
118 }
119
120 void
121 sendevent(Window w, Atom a, long value)
122 {
123         XEvent e;
124
125         e.type = ClientMessage;
126         e.xclient.window = w;
127         e.xclient.message_type = a;
128         e.xclient.format = 32;
129         e.xclient.data.l[0] = value;
130         e.xclient.data.l[1] = CurrentTime;
131         XSendEvent(dpy, w, False, NoEventMask, &e);
132         XSync(dpy, False);
133 }
134
135 void
136 quit(Arg *arg)
137 {
138         running = False;
139 }
140
141 /*
142  * There's no way to check accesses to destroyed windows, thus those cases are
143  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
144  * default error handler, which calls exit().
145  */
146 int
147 xerror(Display *dpy, XErrorEvent *ee)
148 {
149         if(ee->error_code == BadWindow
150         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
151         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
152         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
153         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
154         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
155         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
156                 return 0;
157         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
158                 ee->request_code, ee->error_code);
159         return xerrorxlib(dpy, ee); /* may call exit() */
160 }
161
162 int
163 main(int argc, char *argv[])
164 {
165         int i, xfd;
166         unsigned int mask;
167         fd_set rd;
168         Bool readin = True;
169         Window w;
170         XEvent ev;
171         XSetWindowAttributes wa;
172
173         if(argc == 2 && !strncmp("-v", argv[1], 3)) {
174                 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
175                 exit(EXIT_SUCCESS);
176         }
177         else if(argc != 1)
178                 eprint("usage: dwm [-v]\n");
179
180         dpy = XOpenDisplay(0);
181         if(!dpy)
182                 eprint("dwm: cannot open display\n");
183
184         xfd = ConnectionNumber(dpy);
185         screen = DefaultScreen(dpy);
186         root = RootWindow(dpy, screen);
187
188         otherwm = False;
189         XSetErrorHandler(xerrorstart);
190         /* this causes an error if some other window manager is running */
191         XSelectInput(dpy, root, SubstructureRedirectMask);
192         XSync(dpy, False);
193
194         if(otherwm)
195                 eprint("dwm: another window manager is already running\n");
196
197         XSetErrorHandler(NULL);
198         xerrorxlib = XSetErrorHandler(xerror);
199
200         /* init atoms */
201         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
202         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
203         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
204         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
205         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
206                         PropModeReplace, (unsigned char *) netatom, NetLast);
207
208         /* init cursors */
209         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
210         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
211         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
212
213         grabkeys();
214         initrregs();
215
216         for(ntags = 0; tags[ntags]; ntags++);
217         seltag = emallocz(sizeof(Bool) * ntags);
218         seltag[DEFTAG] = True;
219
220         /* style */
221         dc.bg = getcolor(BGCOLOR);
222         dc.fg = getcolor(FGCOLOR);
223         dc.border = getcolor(BORDERCOLOR);
224         setfont(FONT);
225
226         sx = sy = 0;
227         sw = DisplayWidth(dpy, screen);
228         sh = DisplayHeight(dpy, screen);
229         mw = (sw * MASTERW) / 100;
230
231         wa.override_redirect = 1;
232         wa.background_pixmap = ParentRelative;
233         wa.event_mask = ButtonPressMask | ExposureMask;
234
235         bx = by = 0;
236         bw = sw;
237         dc.h = bh = dc.font.height + 4;
238         barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
239                         CopyFromParent, DefaultVisual(dpy, screen),
240                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
241         XDefineCursor(dpy, barwin, cursor[CurNormal]);
242         XMapRaised(dpy, barwin);
243
244         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
245         dc.gc = XCreateGC(dpy, root, 0, 0);
246
247         strcpy(stext, "dwm-"VERSION);
248         drawstatus();
249
250         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
251
252         wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
253         wa.cursor = cursor[CurNormal];
254         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
255
256         scan();
257
258         /* main event loop, also reads status text from stdin */
259         XSync(dpy, False);
260         while(running) {
261                 FD_ZERO(&rd);
262                 if(readin)
263                         FD_SET(STDIN_FILENO, &rd);
264                 FD_SET(xfd, &rd);
265
266                 i = select(xfd + 1, &rd, NULL, NULL, NULL);
267                 if(i == -1 && errno == EINTR)
268                         continue;
269                 if(i < 0)
270                         eprint("select failed\n");
271                 else if(i > 0) {
272                         if(FD_ISSET(xfd, &rd)) {
273                                 while(XPending(dpy)) {
274                                         XNextEvent(dpy, &ev);
275                                         if(handler[ev.type])
276                                                 (handler[ev.type])(&ev); /* call handler */
277                                 }
278                         }
279                         if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
280                                 readin = NULL != fgets(stext, sizeof(stext), stdin);
281                                 if(readin)
282                                         stext[strlen(stext) - 1] = 0;
283                                 else 
284                                         strcpy(stext, "broken pipe");
285                                 drawstatus();
286                         }
287                 }
288         }
289
290         cleanup();
291         XCloseDisplay(dpy);
292
293         return 0;
294 }