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/keysym.h>
  15 #include <X11/Xatom.h>
  16 #include <X11/Xproto.h>
  17
  18 /* extern */
  19
  20 char stext[1024];
  21 Bool *seltag;
  22 int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
  23 unsigned int ntags, numlockmask, modew;
  24 Atom wmatom[WMLast], netatom[NetLast];
  25 Bool running = True;
  26 Bool issel = True;
  27 Client *clients = NULL;
  28 Client *sel = NULL;
  29 Cursor cursor[CurLast];
  30 Display *dpy;
  31 DC dc = {0};
  32 Window root, barwin;
  33
  34 /* static */
  35
  36 static int (*xerrorxlib)(Display *, XErrorEvent *);
  37 static Bool otherwm, readin;
  38
  39 static void
  40 cleanup()
  41 {
  42         close(STDIN_FILENO);
  43         while(sel) {
  44                 resize(sel, True, TopLeft);
  45                 unmanage(sel);
  46         }
  47         if(dc.font.set)
  48                 XFreeFontSet(dpy, dc.font.set);
  49         else
  50                 XFreeFont(dpy, dc.font.xfont);
  51         XUngrabKey(dpy, AnyKey, AnyModifier, root);
  52         XFreePixmap(dpy, dc.drawable);
  53         XFreeGC(dpy, dc.gc);
  54         XDestroyWindow(dpy, barwin);
  55         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
  56         XSync(dpy, False);
  57 }
  58
  59 static void
  60 scan()
  61 {
  62         unsigned int i, num;
  63         Window *wins, d1, d2;
  64         XWindowAttributes wa;
  65
  66         wins = NULL;
  67         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
  68                 for(i = 0; i < num; i++) {
  69                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
  70                                 continue;
  71                         if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
  72                                 continue;
  73                         if(wa.map_state == IsViewable)
  74                                 manage(wins[i], &wa);
  75                 }
  76         }
  77         if(wins)
  78                 XFree(wins);
  79 }
  80
  81 static void
  82 setup()
  83 {
  84         int i, j;
  85         unsigned int mask;
  86         Window w;
  87         XModifierKeymap *modmap;
  88         XSetWindowAttributes wa;
  89
  90         /* init atoms */
  91         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
  92         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
  93         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
  94         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
  95         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
  96                         PropModeReplace, (unsigned char *) netatom, NetLast);
  97
  98         /* init cursors */
  99         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
 100         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
 101         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
 102
 103         modmap = XGetModifierMapping(dpy);
 104         for (i = 0; i < 8; i++) {
 105                 for (j = 0; j < modmap->max_keypermod; j++) {
 106                         if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
 107                                 numlockmask = (1 << i);
 108                 }
 109         }
 110         XFree(modmap);
 111
 112         wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
 113         wa.cursor = cursor[CurNormal];
 114         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
 115
 116         grabkeys();
 117         initrregs();
 118
 119         for(ntags = 0; tags[ntags]; ntags++);
 120         seltag = emallocz(sizeof(Bool) * ntags);
 121         seltag[0] = True;
 122
 123         /* style */
 124         dc.norm[ColBG] = getcolor(NORMBGCOLOR);
 125         dc.norm[ColFG] = getcolor(NORMFGCOLOR);
 126         dc.sel[ColBG] = getcolor(SELBGCOLOR);
 127         dc.sel[ColFG] = getcolor(SELFGCOLOR);
 128         dc.status[ColBG] = getcolor(STATUSBGCOLOR);
 129         dc.status[ColFG] = getcolor(STATUSFGCOLOR);
 130         setfont(FONT);
 131
 132         modew = textw(FLOATSYMBOL) > textw(TILEDSYMBOL) ? textw(FLOATSYMBOL) : textw(TILEDSYMBOL);
 133         sx = sy = 0;
 134         sw = DisplayWidth(dpy, screen);
 135         sh = DisplayHeight(dpy, screen);
 136         mw = (sw * MASTERW) / 100;
 137
 138         bx = by = 0;
 139         bw = sw;
 140         dc.h = bh = dc.font.height + 2;
 141         wa.override_redirect = 1;
 142         wa.background_pixmap = ParentRelative;
 143         wa.event_mask = ButtonPressMask | ExposureMask;
 144         barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
 145                         CopyFromParent, DefaultVisual(dpy, screen),
 146                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 147         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 148         XMapRaised(dpy, barwin);
 149
 150         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 151         dc.gc = XCreateGC(dpy, root, 0, 0);
 152         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 153
 154         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
 155         strcpy(stext, "dwm-"VERSION);
 156 }
 157
 158 /*
 159  * Startup Error handler to check if another window manager
 160  * is already running.
 161  */
 162 static int
 163 xerrorstart(Display *dsply, XErrorEvent *ee)
 164 {
 165         otherwm = True;
 166         return -1;
 167 }
 168
 169 /* extern */
 170
 171 int
 172 getproto(Window w)
 173 {
 174         int i, format, protos, status;
 175         unsigned long extra, res;
 176         Atom *protocols, real;
 177
 178         protos = 0;
 179         status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
 180                         XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
 181         if(status != Success || protocols == 0)
 182                 return protos;
 183         for(i = 0; i < res; i++)
 184                 if(protocols[i] == wmatom[WMDelete])
 185                         protos |= PROTODELWIN;
 186         free(protocols);
 187         return protos;
 188 }
 189
 190 void
 191 sendevent(Window w, Atom a, long value)
 192 {
 193         XEvent e;
 194
 195         e.type = ClientMessage;
 196         e.xclient.window = w;
 197         e.xclient.message_type = a;
 198         e.xclient.format = 32;
 199         e.xclient.data.l[0] = value;
 200         e.xclient.data.l[1] = CurrentTime;
 201         XSendEvent(dpy, w, False, NoEventMask, &e);
 202         XSync(dpy, False);
 203 }
 204
 205 void
 206 quit(Arg *arg)
 207 {
 208         readin = running = False;
 209 }
 210
 211 /*
 212  * There's no way to check accesses to destroyed windows, thus those cases are
 213  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 214  * default error handler, which calls exit().
 215  */
 216 int
 217 xerror(Display *dpy, XErrorEvent *ee)
 218 {
 219         if(ee->error_code == BadWindow
 220         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 221         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 222         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
 223         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 224         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
 225         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
 226                 return 0;
 227         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 228                 ee->request_code, ee->error_code);
 229         return xerrorxlib(dpy, ee); /* may call exit() */
 230 }
 231
 232 int
 233 main(int argc, char *argv[])
 234 {
 235         int r, xfd;
 236         fd_set rd;
 237
 238         if(argc == 2 && !strncmp("-v", argv[1], 3)) {
 239                 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
 240                 exit(EXIT_SUCCESS);
 241         }
 242         else if(argc != 1)
 243                 eprint("usage: dwm [-v]\n");
 244
 245         dpy = XOpenDisplay(0);
 246         if(!dpy)
 247                 eprint("dwm: cannot open display\n");
 248
 249         xfd = ConnectionNumber(dpy);
 250         screen = DefaultScreen(dpy);
 251         root = RootWindow(dpy, screen);
 252
 253         otherwm = False;
 254         XSetErrorHandler(xerrorstart);
 255         /* this causes an error if some other window manager is running */
 256         XSelectInput(dpy, root, SubstructureRedirectMask);
 257         XSync(dpy, False);
 258
 259         if(otherwm)
 260                 eprint("dwm: another window manager is already running\n");
 261
 262         XSync(dpy, False);
 263         XSetErrorHandler(NULL);
 264         xerrorxlib = XSetErrorHandler(xerror);
 265         XSync(dpy, False);
 266
 267         setup();
 268         drawstatus();
 269         scan();
 270
 271         /* main event loop, also reads status text from stdin */
 272         XSync(dpy, False);
 273         procevent();
 274         readin = True;
 275         while(running) {
 276                 FD_ZERO(&rd);
 277                 if(readin)
 278                         FD_SET(STDIN_FILENO, &rd);
 279                 FD_SET(xfd, &rd);
 280                 r = select(xfd + 1, &rd, NULL, NULL, NULL);
 281                 if((r == -1) && (errno == EINTR))
 282                         continue;
 283                 if(r > 0) {
 284                         if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
 285                                 readin = NULL != fgets(stext, sizeof(stext), stdin);
 286                                 if(readin)
 287                                         stext[strlen(stext) - 1] = 0;
 288                                 else
 289                                         strcpy(stext, "broken pipe");
 290                                 drawstatus();
 291                         }
 292                 }
 293                 else if(r < 0)
 294                         eprint("select failed\n");
 295                 procevent();
 296         }
 297         cleanup();
 298         XCloseDisplay(dpy);
 299
 300         return 0;
 301 }