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 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;
  35
  36 /* static */
  37
  38 static int (*xerrorxlib)(Display *, XErrorEvent *);
  39 static Bool otherwm, readin;
  40
  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 }
  61
  62 static void
  63 scan()
  64 {
  65         unsigned int i, num;
  66         Window *wins, d1, d2;
  67         XWindowAttributes wa;
  68
  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 }
  83
  84 static void
  85 setup()
  86 {
  87         int i, j;
  88         unsigned int mask;
  89         Window w;
  90         XModifierKeymap *modmap;
  91         XSetWindowAttributes wa;
  92
  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);
 100
 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);
 105
 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);
 114
 115         wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
 116         wa.cursor = cursor[CurNormal];
 117         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
 118
 119         grabkeys();
 120         initrregs();
 121
 122         for(ntags = 0; tags[ntags]; ntags++);
 123         seltag = emallocz(sizeof(Bool) * ntags);
 124         seltag[0] = True;
 125
 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);
 134
 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;
 140
 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);
 152
 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);
 156
 157         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
 158         strcpy(stext, "dwm-"VERSION);
 159 }
 160
 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 }
 171
 172 /* extern */
 173
 174 int
 175 getproto(Window w)
 176 {
 177         int i, format, protos, status;
 178         unsigned long extra, res;
 179         Atom *protocols, real;
 180
 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 }
 192
 193 void
 194 sendevent(Window w, Atom a, long value)
 195 {
 196         XEvent e;
 197
 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 }
 207
 208 void
 209 quit(Arg *arg)
 210 {
 211         readin = running = False;
 212 }
 213
 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         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 230                 return 0;
 231         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 232                 ee->request_code, ee->error_code);
 233         return xerrorxlib(dpy, ee); /* may call exit */
 234 }
 235
 236 int
 237 main(int argc, char *argv[])
 238 {
 239         int r, xfd;
 240         fd_set rd;
 241
 242         if(argc == 2 && !strncmp("-v", argv[1], 3)) {
 243                 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
 244                 exit(EXIT_SUCCESS);
 245         }
 246         else if(argc != 1)
 247                 eprint("usage: dwm [-v]\n");
 248
 249         dpy = XOpenDisplay(0);
 250         if(!dpy)
 251                 eprint("dwm: cannot open display\n");
 252
 253         xfd = ConnectionNumber(dpy);
 254         screen = DefaultScreen(dpy);
 255         root = RootWindow(dpy, screen);
 256
 257         otherwm = False;
 258         XSetErrorHandler(xerrorstart);
 259         /* this causes an error if some other window manager is running */
 260         XSelectInput(dpy, root, SubstructureRedirectMask);
 261         XSync(dpy, False);
 262
 263         if(otherwm)
 264                 eprint("dwm: another window manager is already running\n");
 265
 266         XSync(dpy, False);
 267         XSetErrorHandler(NULL);
 268         xerrorxlib = XSetErrorHandler(xerror);
 269         XSync(dpy, False);
 270
 271         setup();
 272         drawstatus();
 273         scan();
 274
 275         /* main event loop, also reads status text from stdin */
 276         XSync(dpy, False);
 277         procevent();
 278         readin = True;
 279         while(running) {
 280                 FD_ZERO(&rd);
 281                 if(readin)
 282                         FD_SET(STDIN_FILENO, &rd);
 283                 FD_SET(xfd, &rd);
 284                 r = select(xfd + 1, &rd, NULL, NULL, NULL);
 285                 if((r == -1) && (errno == EINTR))
 286                         continue;
 287                 if(r > 0) {
 288                         if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
 289                                 readin = NULL != fgets(stext, sizeof(stext), stdin);
 290                                 if(readin)
 291                                         stext[strlen(stext) - 1] = 0;
 292                                 else
 293                                         strcpy(stext, "broken pipe");
 294                                 drawstatus();
 295                         }
 296                 }
 297                 else if(r < 0)
 298                         eprint("select failed\n");
 299                 procevent();
 300         }
 301         cleanup();
 302         XCloseDisplay(dpy);
 303
 304         return 0;
 305 }