aewl
view main.c @ 455:4e3e22673073
fixed some other comments, now also the code side seems to be at a level to be reviewed by experienced programmers
| author | Anselm R. Garbe <arg@10kloc.org> |
|---|---|
| date | Mon, 11 Sep 2006 11:28:28 +0200 |
| parents | a2e587651c79 |
| children | 81fcd7ddafee |
line source
1 /*
2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
3 * See LICENSE file for license details.
4 */
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/keysym.h>
15 #include <X11/Xatom.h>
16 #include <X11/Xproto.h>
18 /* extern */
20 char stext[1024];
21 Bool *seltag;
22 int bx, by, bw, bh, bmw, mw, screen, sx, sy, sw, sh;
23 unsigned int ntags, numlockmask;
24 Atom wmatom[WMLast], netatom[NetLast];
25 Bool running = True;
26 Bool issel = True;
27 Bool maximized = False;
28 Client *clients = NULL;
29 Client *sel = NULL;
30 Client *stack = NULL;
31 Cursor cursor[CurLast];
32 Display *dpy;
33 DC dc = {0};
34 Window root, barwin;
36 /* static */
38 static int (*xerrorxlib)(Display *, XErrorEvent *);
39 static Bool otherwm, readin;
41 static void
42 cleanup()
43 {
44 close(STDIN_FILENO);
45 while(sel) {
46 resize(sel, True, TopLeft);
47 unmanage(sel);
48 }
49 if(dc.font.set)
50 XFreeFontSet(dpy, dc.font.set);
51 else
52 XFreeFont(dpy, dc.font.xfont);
53 XUngrabKey(dpy, AnyKey, AnyModifier, root);
54 XFreePixmap(dpy, dc.drawable);
55 XFreeGC(dpy, dc.gc);
56 XDestroyWindow(dpy, barwin);
57 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
58 XSync(dpy, False);
59 free(seltag);
60 }
62 static void
63 scan()
64 {
65 unsigned int i, num;
66 Window *wins, d1, d2;
67 XWindowAttributes wa;
69 wins = NULL;
70 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
71 for(i = 0; i < num; i++) {
72 if(!XGetWindowAttributes(dpy, wins[i], &wa))
73 continue;
74 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
75 continue;
76 if(wa.map_state == IsViewable)
77 manage(wins[i], &wa);
78 }
79 }
80 if(wins)
81 XFree(wins);
82 }
84 static void
85 setup()
86 {
87 int i, j;
88 unsigned int mask;
89 Window w;
90 XModifierKeymap *modmap;
91 XSetWindowAttributes wa;
93 /* init atoms */
94 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
95 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
96 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
97 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
98 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
99 PropModeReplace, (unsigned char *) netatom, NetLast);
101 /* init cursors */
102 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
103 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
104 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
106 modmap = XGetModifierMapping(dpy);
107 for (i = 0; i < 8; i++) {
108 for (j = 0; j < modmap->max_keypermod; j++) {
109 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
110 numlockmask = (1 << i);
111 }
112 }
113 XFree(modmap);
115 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
116 wa.cursor = cursor[CurNormal];
117 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
119 grabkeys();
120 initrregs();
122 for(ntags = 0; tags[ntags]; ntags++);
123 seltag = emallocz(sizeof(Bool) * ntags);
124 seltag[0] = True;
126 /* style */
127 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
128 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
129 dc.sel[ColBG] = getcolor(SELBGCOLOR);
130 dc.sel[ColFG] = getcolor(SELFGCOLOR);
131 dc.status[ColBG] = getcolor(STATUSBGCOLOR);
132 dc.status[ColFG] = getcolor(STATUSFGCOLOR);
133 setfont(FONT);
135 bmw = textw(FLOATSYMBOL) > textw(TILESYMBOL) ? textw(FLOATSYMBOL) : textw(TILESYMBOL);
136 sx = sy = 0;
137 sw = DisplayWidth(dpy, screen);
138 sh = DisplayHeight(dpy, screen);
139 mw = (sw * MASTERW) / 100;
141 bx = by = 0;
142 bw = sw;
143 dc.h = bh = dc.font.height + 2;
144 wa.override_redirect = 1;
145 wa.background_pixmap = ParentRelative;
146 wa.event_mask = ButtonPressMask | ExposureMask;
147 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
148 CopyFromParent, DefaultVisual(dpy, screen),
149 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
150 XDefineCursor(dpy, barwin, cursor[CurNormal]);
151 XMapRaised(dpy, barwin);
153 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
154 dc.gc = XCreateGC(dpy, root, 0, 0);
155 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
157 issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
158 strcpy(stext, "dwm-"VERSION);
159 }
161 /*
162 * Startup Error handler to check if another window manager
163 * is already running.
164 */
165 static int
166 xerrorstart(Display *dsply, XErrorEvent *ee)
167 {
168 otherwm = True;
169 return -1;
170 }
172 /* extern */
174 int
175 getproto(Window w)
176 {
177 int i, format, protos, status;
178 unsigned long extra, res;
179 Atom *protocols, real;
181 protos = 0;
182 status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
183 XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
184 if(status != Success || protocols == 0)
185 return protos;
186 for(i = 0; i < res; i++)
187 if(protocols[i] == wmatom[WMDelete])
188 protos |= PROTODELWIN;
189 free(protocols);
190 return protos;
191 }
193 void
194 sendevent(Window w, Atom a, long value)
195 {
196 XEvent e;
198 e.type = ClientMessage;
199 e.xclient.window = w;
200 e.xclient.message_type = a;
201 e.xclient.format = 32;
202 e.xclient.data.l[0] = value;
203 e.xclient.data.l[1] = CurrentTime;
204 XSendEvent(dpy, w, False, NoEventMask, &e);
205 XSync(dpy, False);
206 }
208 void
209 quit(Arg *arg)
210 {
211 readin = running = False;
212 }
214 /*
215 * There's no way to check accesses to destroyed windows, thus those cases are
216 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
217 * default error handler, which may call exit.
218 */
219 int
220 xerror(Display *dpy, XErrorEvent *ee)
221 {
222 if(ee->error_code == BadWindow
223 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
224 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
225 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
226 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
227 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
228 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
229 return 0;
230 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
231 ee->request_code, ee->error_code);
232 return xerrorxlib(dpy, ee); /* may call exit */
233 }
235 int
236 main(int argc, char *argv[])
237 {
238 int r, xfd;
239 fd_set rd;
241 if(argc == 2 && !strncmp("-v", argv[1], 3)) {
242 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
243 exit(EXIT_SUCCESS);
244 }
245 else if(argc != 1)
246 eprint("usage: dwm [-v]\n");
248 dpy = XOpenDisplay(0);
249 if(!dpy)
250 eprint("dwm: cannot open display\n");
252 xfd = ConnectionNumber(dpy);
253 screen = DefaultScreen(dpy);
254 root = RootWindow(dpy, screen);
256 otherwm = False;
257 XSetErrorHandler(xerrorstart);
258 /* this causes an error if some other window manager is running */
259 XSelectInput(dpy, root, SubstructureRedirectMask);
260 XSync(dpy, False);
262 if(otherwm)
263 eprint("dwm: another window manager is already running\n");
265 XSync(dpy, False);
266 XSetErrorHandler(NULL);
267 xerrorxlib = XSetErrorHandler(xerror);
268 XSync(dpy, False);
270 setup();
271 drawstatus();
272 scan();
274 /* main event loop, also reads status text from stdin */
275 XSync(dpy, False);
276 procevent();
277 readin = True;
278 while(running) {
279 FD_ZERO(&rd);
280 if(readin)
281 FD_SET(STDIN_FILENO, &rd);
282 FD_SET(xfd, &rd);
283 r = select(xfd + 1, &rd, NULL, NULL, NULL);
284 if((r == -1) && (errno == EINTR))
285 continue;
286 if(r > 0) {
287 if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
288 readin = NULL != fgets(stext, sizeof(stext), stdin);
289 if(readin)
290 stext[strlen(stext) - 1] = 0;
291 else
292 strcpy(stext, "broken pipe");
293 drawstatus();
294 }
295 }
296 else if(r < 0)
297 eprint("select failed\n");
298 procevent();
299 }
300 cleanup();
301 XCloseDisplay(dpy);
303 return 0;
304 }