main.c

   1 /* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4
   5 #include "dwm.h"
   6 #include <errno.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <sys/select.h>
  12 #include <X11/cursorfont.h>
  13 #include <X11/keysym.h>
  14 #include <X11/Xatom.h>
  15 #include <X11/Xproto.h>
  16
  17 /* extern */
  18
  19 char stext[1024];
  20 Bool *seltag;
  21 int bx, by, bw, bh, bmw, masterd, screen, sx, sy, sw, sh;
  22 unsigned int master, ntags, numlockmask;
  23 Atom wmatom[WMLast], netatom[NetLast];
  24 Bool running = True;
  25 Bool issel = True;
  26 Client *clients = NULL;
  27 Client *sel = NULL;
  28 Client *stack = 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(void) {
  41         close(STDIN_FILENO);
  42         while(sel) {
  43                 resize(sel, True, TopLeft);
  44                 unmanage(sel);
  45         }
  46         if(dc.font.set)
  47                 XFreeFontSet(dpy, dc.font.set);
  48         else
  49                 XFreeFont(dpy, dc.font.xfont);
  50         XUngrabKey(dpy, AnyKey, AnyModifier, root);
  51         XFreePixmap(dpy, dc.drawable);
  52         XFreeGC(dpy, dc.gc);
  53         XDestroyWindow(dpy, barwin);
  54         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
  55         XSync(dpy, False);
  56         free(seltag);
  57 }
  58
  59 static void
  60 scan(void) {
  61         unsigned int i, num;
  62         Window *wins, d1, d2;
  63         XWindowAttributes wa;
  64
  65         wins = NULL;
  66         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
  67                 for(i = 0; i < num; i++) {
  68                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
  69                                 continue;
  70                         if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
  71                                 continue;
  72                         if(wa.map_state == IsViewable)
  73                                 manage(wins[i], &wa);
  74                 }
  75         }
  76         if(wins)
  77                 XFree(wins);
  78 }
  79
  80 static void
  81 setup(void) {
  82         int i, j;
  83         unsigned int mask;
  84         Window w;
  85         XModifierKeymap *modmap;
  86         XSetWindowAttributes wa;
  87
  88         /* init atoms */
  89         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
  90         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
  91         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
  92         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
  93         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
  94                         PropModeReplace, (unsigned char *) netatom, NetLast);
  95         /* init cursors */
  96         cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
  97         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
  98         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
  99         /* init modifier map */
 100         modmap = XGetModifierMapping(dpy);
 101         for (i = 0; i < 8; i++) {
 102                 for (j = 0; j < modmap->max_keypermod; j++) {
 103                         if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
 104                                 numlockmask = (1 << i);
 105                 }
 106         }
 107         XFree(modmap);
 108         /* select for events */
 109         wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
 110                 | EnterWindowMask | LeaveWindowMask;
 111         wa.cursor = cursor[CurNormal];
 112         XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
 113         grabkeys();
 114         initrregs();
 115         for(ntags = 0; tags[ntags]; ntags++);
 116         seltag = emallocz(sizeof(Bool) * ntags);
 117         seltag[0] = True;
 118         /* style */
 119         dc.norm[ColBG] = getcolor(NORMBGCOLOR);
 120         dc.norm[ColFG] = getcolor(NORMFGCOLOR);
 121         dc.sel[ColBG] = getcolor(SELBGCOLOR);
 122         dc.sel[ColFG] = getcolor(SELFGCOLOR);
 123         dc.status[ColBG] = getcolor(STATUSBGCOLOR);
 124         dc.status[ColFG] = getcolor(STATUSFGCOLOR);
 125         setfont(FONT);
 126         /* geometry */
 127         bmw = textw(TILESYMBOL) > textw(FLOATSYMBOL) ?  textw(TILESYMBOL) : textw(FLOATSYMBOL);
 128         sx = sy = 0;
 129         sw = DisplayWidth(dpy, screen);
 130         sh = DisplayHeight(dpy, screen);
 131         master = MASTER;
 132         /* bar */
 133         bx = by = 0;
 134         bw = sw;
 135         dc.h = bh = dc.font.height + 2;
 136         wa.override_redirect = 1;
 137         wa.background_pixmap = ParentRelative;
 138         wa.event_mask = ButtonPressMask | ExposureMask;
 139         barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
 140                         CopyFromParent, DefaultVisual(dpy, screen),
 141                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 142         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 143         XMapRaised(dpy, barwin);
 144         strcpy(stext, "dwm-"VERSION);
 145         /* pixmap for everything */
 146         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 147         dc.gc = XCreateGC(dpy, root, 0, 0);
 148         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 149         /* multihead support */
 150         issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
 151 }
 152
 153 /*
 154  * Startup Error handler to check if another window manager
 155  * is already running.
 156  */
 157 static int
 158 xerrorstart(Display *dsply, XErrorEvent *ee) {
 159         otherwm = True;
 160         return -1;
 161 }
 162
 163 /* extern */
 164
 165 int
 166 getproto(Window w) {
 167         int i, format, protos, status;
 168         unsigned long extra, res;
 169         Atom *protocols, real;
 170
 171         protos = 0;
 172         status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
 173                         XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
 174         if(status != Success || protocols == 0)
 175                 return protos;
 176         for(i = 0; i < res; i++)
 177                 if(protocols[i] == wmatom[WMDelete])
 178                         protos |= PROTODELWIN;
 179         free(protocols);
 180         return protos;
 181 }
 182
 183 void
 184 sendevent(Window w, Atom a, long value) {
 185         XEvent e;
 186
 187         e.type = ClientMessage;
 188         e.xclient.window = w;
 189         e.xclient.message_type = a;
 190         e.xclient.format = 32;
 191         e.xclient.data.l[0] = value;
 192         e.xclient.data.l[1] = CurrentTime;
 193         XSendEvent(dpy, w, False, NoEventMask, &e);
 194         XSync(dpy, False);
 195 }
 196
 197 void
 198 quit(Arg *arg) {
 199         readin = running = False;
 200 }
 201
 202 /* There's no way to check accesses to destroyed windows, thus those cases are
 203  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
 204  * default error handler, which may call exit.
 205  */
 206 int
 207 xerror(Display *dpy, XErrorEvent *ee) {
 208         if(ee->error_code == BadWindow
 209         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
 210         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
 211         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
 212         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
 213         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
 214         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
 215         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
 216                 return 0;
 217         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 218                 ee->request_code, ee->error_code);
 219         return xerrorxlib(dpy, ee); /* may call exit */
 220 }
 221
 222 int
 223 main(int argc, char *argv[]) {
 224         int r, xfd;
 225         fd_set rd;
 226
 227         if(argc == 2 && !strncmp("-v", argv[1], 3)) {
 228                 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
 229                 exit(EXIT_SUCCESS);
 230         }
 231         else if(argc != 1)
 232                 eprint("usage: dwm [-v]\n");
 233         dpy = XOpenDisplay(0);
 234         if(!dpy)
 235                 eprint("dwm: cannot open display\n");
 236         xfd = ConnectionNumber(dpy);
 237         screen = DefaultScreen(dpy);
 238         root = RootWindow(dpy, screen);
 239         otherwm = False;
 240         XSetErrorHandler(xerrorstart);
 241         /* this causes an error if some other window manager is running */
 242         XSelectInput(dpy, root, SubstructureRedirectMask);
 243         XSync(dpy, False);
 244         if(otherwm)
 245                 eprint("dwm: another window manager is already running\n");
 246
 247         XSync(dpy, False);
 248         XSetErrorHandler(NULL);
 249         xerrorxlib = XSetErrorHandler(xerror);
 250         XSync(dpy, False);
 251         setup();
 252         drawstatus();
 253         scan();
 254
 255         /* main event loop, also reads status text from stdin */
 256         XSync(dpy, False);
 257         procevent();
 258         readin = True;
 259         while(running) {
 260                 FD_ZERO(&rd);
 261                 if(readin)
 262                         FD_SET(STDIN_FILENO, &rd);
 263                 FD_SET(xfd, &rd);
 264                 r = select(xfd + 1, &rd, NULL, NULL, NULL);
 265                 if((r == -1) && (errno == EINTR))
 266                         continue;
 267                 if(r > 0) {
 268                         if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
 269                                 readin = NULL != fgets(stext, sizeof(stext), stdin);
 270                                 if(readin)
 271                                         stext[strlen(stext) - 1] = 0;
 272                                 else
 273                                         strcpy(stext, "broken pipe");
 274                                 drawstatus();
 275                         }
 276                 }
 277                 else if(r < 0)
 278                         eprint("select failed\n");
 279                 procevent();
 280         }
 281         cleanup();
 282         XCloseDisplay(dpy);
 283         return 0;
 284 }