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implemented ungrabkeys() which is called in cleanup()
[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         ungrabkeys();
26         while(sel) {
27                 resize(sel, True, TopLeft);
28                 unmanage(sel);
29         }
30         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
31 }
32
33 static void
34 scan()
35 {
36         unsigned int i, num;
37         Window *wins, d1, d2;
38         XWindowAttributes wa;
39
40         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
41                 for(i = 0; i < num; i++) {
42                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
43                                 continue;
44                         if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
45                                 continue;
46                         if(wa.map_state == IsViewable)
47                                 manage(wins[i], &wa);
48                 }
49         }
50         if(wins)
51                 XFree(wins);
52 }
53
54 static int
55 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
56 {
57         int status, format;
58         unsigned long res, extra;
59         Atom real;
60
61         status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
62                         &res, &extra, prop);
63
64         if(status != Success || *prop == 0) {
65                 return 0;
66         }
67         if(res == 0) {
68                 free((void *) *prop);
69         }
70         return res;
71 }
72
73 /*
74  * Startup Error handler to check if another window manager
75  * is already running.
76  */
77 static int
78 xerrorstart(Display *dsply, XErrorEvent *ee)
79 {
80         otherwm = True;
81         return -1;
82 }
83
84 /* extern */
85
86 char stext[1024];
87 Bool *seltag;
88 int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
89 unsigned int ntags;
90 Atom wmatom[WMLast], netatom[NetLast];
91 Bool running = True;
92 Bool issel = True;
93 Client *clients = NULL;
94 Client *sel = NULL;
95 Cursor cursor[CurLast];
96 Display *dpy;
97 DC dc = {0};
98 Window root, barwin;
99
100 int
101 getproto(Window w)
102 {
103         int protos = 0;
104         int i;
105         long res;
106         Atom *protocols;
107
108         res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L,
109                         ((unsigned char **)&protocols));
110         if(res <= 0) {
111                 return protos;
112         }
113         for(i = 0; i < res; i++) {
114                 if(protocols[i] == wmatom[WMDelete])
115                         protos |= PROTODELWIN;
116         }
117         free((char *) protocols);
118         return protos;
119 }
120
121 void
122 sendevent(Window w, Atom a, long value)
123 {
124         XEvent e;
125
126         e.type = ClientMessage;
127         e.xclient.window = w;
128         e.xclient.message_type = a;
129         e.xclient.format = 32;
130         e.xclient.data.l[0] = value;
131         e.xclient.data.l[1] = CurrentTime;
132         XSendEvent(dpy, w, False, NoEventMask, &e);
133         XSync(dpy, False);
134 }
135
136 void
137 quit(Arg *arg)
138 {
139         running = False;
140 }
141
142 /*
143  * There's no way to check accesses to destroyed windows, thus those cases are
144  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
145  * default error handler, which calls exit().
146  */
147 int
148 xerror(Display *dpy, XErrorEvent *ee)
149 {
150         if(ee->error_code == BadWindow
151         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
152         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
153         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
154         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
155         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
156         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
157                 return 0;
158         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
159                 ee->request_code, ee->error_code);
160         return xerrorxlib(dpy, ee); /* may call exit() */
161 }
162
163 int
164 main(int argc, char *argv[])
165 {
166         int i, xfd;
167         unsigned int mask;
168         fd_set rd;
169         Bool readin = True;
170         Window w;
171         XEvent ev;
172         XSetWindowAttributes wa;
173
174         if(argc == 2 && !strncmp("-v", argv[1], 3)) {
175                 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
176                 exit(EXIT_SUCCESS);
177         }
178         else if(argc != 1)
179                 eprint("usage: dwm [-v]\n");
180
181         dpy = XOpenDisplay(0);
182         if(!dpy)
183                 eprint("dwm: cannot open display\n");
184
185         xfd = ConnectionNumber(dpy);
186         screen = DefaultScreen(dpy);
187         root = RootWindow(dpy, screen);
188
189         otherwm = False;
190         XSetErrorHandler(xerrorstart);
191         /* this causes an error if some other window manager is running */
192         XSelectInput(dpy, root, SubstructureRedirectMask);
193         XSync(dpy, False);
194
195         if(otherwm)
196                 eprint("dwm: another window manager is already running\n");
197
198         XSetErrorHandler(NULL);
199         xerrorxlib = XSetErrorHandler(xerror);
200
201         /* init atoms */
202         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
203         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
204         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
205         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
206         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
207                         PropModeReplace, (unsigned char *) netatom, NetLast);
208
209         /* init cursors */
210         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
211         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
212         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
213
214         grabkeys();
215         initrregs();
216
217         for(ntags = 0; tags[ntags]; ntags++);
218         seltag = emallocz(sizeof(Bool) * ntags);
219         seltag[DEFTAG] = True;
220
221         /* style */
222         dc.bg = getcolor(BGCOLOR);
223         dc.fg = getcolor(FGCOLOR);
224         dc.border = getcolor(BORDERCOLOR);
225         setfont(FONT);
226
227         sx = sy = 0;
228         sw = DisplayWidth(dpy, screen);
229         sh = DisplayHeight(dpy, screen);
230         mw = (sw * MASTERW) / 100;
231
232         wa.override_redirect = 1;
233         wa.background_pixmap = ParentRelative;
234         wa.event_mask = ButtonPressMask | ExposureMask;
235
236         bx = by = 0;
237         bw = sw;
238         dc.h = bh = dc.font.height + 4;
239         barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
240                         CopyFromParent, DefaultVisual(dpy, screen),
241                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
242         XDefineCursor(dpy, barwin, cursor[CurNormal]);
243         XMapRaised(dpy, barwin);
244
245         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
246         dc.gc = XCreateGC(dpy, root, 0, 0);
247
248         strcpy(stext, "dwm-"VERSION);
249         drawstatus();
250
251         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
252
253         wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
254         wa.cursor = cursor[CurNormal];
255         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
256
257         scan();
258
259         /* main event loop, also reads status text from stdin */
260         XSync(dpy, False);
261         while(running) {
262                 FD_ZERO(&rd);
263                 if(readin)
264                         FD_SET(STDIN_FILENO, &rd);
265                 FD_SET(xfd, &rd);
266
267                 i = select(xfd + 1, &rd, NULL, NULL, NULL);
268                 if(i == -1 && errno == EINTR)
269                         continue;
270                 if(i < 0)
271                         eprint("select failed\n");
272                 else if(i > 0) {
273                         if(FD_ISSET(xfd, &rd)) {
274                                 while(XPending(dpy)) {
275                                         XNextEvent(dpy, &ev);
276                                         if(handler[ev.type])
277                                                 (handler[ev.type])(&ev); /* call handler */
278                                 }
279                         }
280                         if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
281                                 readin = NULL != fgets(stext, sizeof(stext), stdin);
282                                 if(readin)
283                                         stext[strlen(stext) - 1] = 0;
284                                 else 
285                                         strcpy(stext, "broken pipe");
286                                 drawstatus();
287                         }
288                 }
289         }
290
291         cleanup();
292         XCloseDisplay(dpy);
293
294         return 0;
295 }