dwm.c

   1 /* See LICENSE file for copyright and license details.
   2  *
   3  * dynamic window manager is designed like any other X client as well. It is
   4  * driven through handling X events. In contrast to other X clients, a window
   5  * manager selects for SubstructureRedirectMask on the root window, to receive
   6  * events about window (dis-)appearance.  Only one X connection at a time is
   7  * allowed to select for this event mask.
   8  *
   9  * Calls to fetch an X event from the event queue are blocking.  Due reading
  10  * status text from standard input, a select()-driven main loop has been
  11  * implemented which selects for reads on the X connection and STDIN_FILENO to
  12  * handle all data smoothly. The event handlers of dwm are organized in an
  13  * array which is accessed whenever a new event has been fetched. This allows
  14  * event dispatching in O(1) time.
  15  *
  16  * Each child of the root window is called a client, except windows which have
  17  * set the override_redirect flag.  Clients are organized in a global
  18  * doubly-linked client list, the focus history is remembered through a global
  19  * stack list. Each client contains an array of Bools of the same size as the
  20  * global tags array to indicate the tags of a client.
  21  *
  22  * Keys and tagging rules are organized as arrays and defined in config.h.
  23  *
  24  * To understand everything else, start reading main().
  25  */
  26 #include <errno.h>
  27 #include <locale.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <sys/select.h>
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36 #include <regex.h>
  37 #include <X11/cursorfont.h>
  38 #include <X11/keysym.h>
  39 #include <X11/Xatom.h>
  40 #include <X11/Xlib.h>
  41 #include <X11/Xproto.h>
  42 #include <X11/Xutil.h>
  43 //#ifdef XINERAMA
  44 #include <X11/extensions/Xinerama.h>
  45 //#endif
  46
  47 /* macros */
  48 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  49 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask))
  50 #define LENGTH(x)               (sizeof x / sizeof x[0])
  51 #define MAXTAGLEN               16
  52 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  53
  54
  55 /* enums */
  56 enum { BarTop, BarBot, BarOff };                        /* bar position */
  57 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
  58 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
  59 enum { NetSupported, NetWMName, NetLast };              /* EWMH atoms */
  60 enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
  61
  62 /* typedefs */
  63 typedef struct View View;
  64 typedef struct Client Client;
  65 struct Client {
  66         char name[256];
  67         int x, y, w, h;
  68         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  69         int minax, maxax, minay, maxay;
  70         int *tags;
  71         long flags;
  72         unsigned int border, oldborder;
  73         Bool isbanned, isfixed, isfloating, isurgent;
  74         Client *next;
  75         Client *prev;
  76         Client *snext;
  77         Window win;
  78 };
  79
  80 typedef struct {
  81         int x, y, w, h;
  82         unsigned long norm[ColLast];
  83         unsigned long sel[ColLast];
  84         Drawable drawable;
  85         GC gc;
  86         struct {
  87                 int ascent;
  88                 int descent;
  89                 int height;
  90                 XFontSet set;
  91                 XFontStruct *xfont;
  92         } font;
  93 } DC; /* draw context */
  94
  95 typedef struct {
  96         unsigned long mod;
  97         KeySym keysym;
  98         void (*func)(const char *arg);
  99         const char *arg;
 100 } Key;
 101
 102 typedef struct {
 103         const char *symbol;
 104         void (*arrange)(View *);
 105 } Layout;
 106
 107 typedef struct {
 108         const char *prop;
 109         const char *tag;
 110         Bool isfloating;
 111 } Rule;
 112
 113 struct View {
 114         int id;
 115         int x, y, w, h, wax, way, wah, waw;
 116         double mwfact;
 117         Layout *layout;
 118         Window barwin;
 119 };
 120
 121 /* function declarations */
 122 void applyrules(Client *c);
 123 void arrange(void);
 124 void attach(Client *c);
 125 void attachstack(Client *c);
 126 void ban(Client *c);
 127 void buttonpress(XEvent *e);
 128 void checkotherwm(void);
 129 void cleanup(void);
 130 void configure(Client *c);
 131 void configurenotify(XEvent *e);
 132 void configurerequest(XEvent *e);
 133 void destroynotify(XEvent *e);
 134 void detach(Client *c);
 135 void detachstack(Client *c);
 136 void drawbar(View *v);
 137 void drawsquare(View *v, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
 138 void drawtext(View *v, const char *text, unsigned long col[ColLast], Bool invert);
 139 void *emallocz(unsigned int size);
 140 void enternotify(XEvent *e);
 141 void eprint(const char *errstr, ...);
 142 void expose(XEvent *e);
 143 void floating(View *v); /* default floating layout */
 144 void focus(Client *c);
 145 void focusin(XEvent *e);
 146 void focusnext(const char *arg);
 147 void focusprev(const char *arg);
 148 Client *getclient(Window w);
 149 unsigned long getcolor(const char *colstr);
 150 View *getviewbar(Window barwin);
 151 View *getview(Client *c);
 152 long getstate(Window w);
 153 Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 154 void grabbuttons(Client *c, Bool focused);
 155 void grabkeys(void);
 156 unsigned int idxoftag(const char *tag);
 157 void initfont(const char *fontstr);
 158 Bool isoccupied(unsigned int t);
 159 Bool isprotodel(Client *c);
 160 Bool isurgent(unsigned int t);
 161 Bool isvisible(Client *c);
 162 void keypress(XEvent *e);
 163 void killclient(const char *arg);
 164 void manage(Window w, XWindowAttributes *wa);
 165 void mappingnotify(XEvent *e);
 166 void maprequest(XEvent *e);
 167 View *viewat(void);
 168 void movemouse(Client *c);
 169 Client *nexttiled(Client *c, View *v);
 170 void propertynotify(XEvent *e);
 171 void quit(const char *arg);
 172 void reapply(const char *arg);
 173 void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
 174 void resizemouse(Client *c);
 175 void restack(View *v);
 176 void run(void);
 177 void scan(void);
 178 void setclientstate(Client *c, long state);
 179 void setlayout(const char *arg);
 180 void setmwfact(const char *arg);
 181 void setup(void);
 182 void spawn(const char *arg);
 183 void tag(const char *arg);
 184 unsigned int textnw(const char *text, unsigned int len);
 185 unsigned int textw(const char *text);
 186 void tile(View *v);
 187 void togglebar(const char *arg);
 188 void togglefloating(const char *arg);
 189 void toggletag(const char *arg);
 190 void toggleview(const char *arg);
 191 void unban(Client *c);
 192 void unmanage(Client *c);
 193 void unmapnotify(XEvent *e);
 194 void updatebarpos(View *v);
 195 void updatesizehints(Client *c);
 196 void updatetitle(Client *c);
 197 void updatewmhints(Client *c);
 198 void view(const char *arg);
 199 void viewprevtag(const char *arg);      /* views previous selected tags */
 200 int xerror(Display *dpy, XErrorEvent *ee);
 201 int xerrordummy(Display *dpy, XErrorEvent *ee);
 202 int xerrorstart(Display *dpy, XErrorEvent *ee);
 203 void zoom(const char *arg);
 204 void selectview(const char *arg);
 205
 206 /* variables */
 207 char stext[256], buf[256];
 208 int nviews = 1;
 209 View *selview;
 210 int screen;
 211 int *seltags;
 212 int *prevtags;
 213 int (*xerrorxlib)(Display *, XErrorEvent *);
 214 unsigned int bh, bpos;
 215 unsigned int blw = 0;
 216 unsigned int numlockmask = 0;
 217 void (*handler[LASTEvent]) (XEvent *) = {
 218         [ButtonPress] = buttonpress,
 219         [ConfigureRequest] = configurerequest,
 220         [ConfigureNotify] = configurenotify,
 221         [DestroyNotify] = destroynotify,
 222         [EnterNotify] = enternotify,
 223         [Expose] = expose,
 224         [FocusIn] = focusin,
 225         [KeyPress] = keypress,
 226         [MappingNotify] = mappingnotify,
 227         [MapRequest] = maprequest,
 228         [PropertyNotify] = propertynotify,
 229         [UnmapNotify] = unmapnotify
 230 };
 231 Atom wmatom[WMLast], netatom[NetLast];
 232 Bool isxinerama = False;
 233 Bool domwfact = True;
 234 Bool dozoom = True;
 235 Bool otherwm, readin;
 236 Bool running = True;
 237 Client *clients = NULL;
 238 Client *sel = NULL;
 239 Client *stack = NULL;
 240 Cursor cursor[CurLast];
 241 Display *dpy;
 242 DC dc = {0};
 243 View *views;
 244 Window root;
 245
 246 /* configuration, allows nested code to access above variables */
 247 #include "config.h"
 248
 249 /* function implementations */
 250 void
 251 applyrules(Client *c) {
 252         unsigned int i;
 253         Bool matched_tag = False;
 254         Rule *r;
 255         XClassHint ch = { 0 };
 256
 257         /* rule matching */
 258         XGetClassHint(dpy, c->win, &ch);
 259         snprintf(buf, sizeof buf, "%s:%s:%s",
 260                         ch.res_class ? ch.res_class : "",
 261                         ch.res_name ? ch.res_name : "", c->name);
 262         for(i = 0; i < LENGTH(rules); i++) {
 263                 r = &rules[i];
 264                 if(strstr(c->name, r->prop)
 265                 || (ch.res_class && strstr(ch.res_class, r->prop))
 266                 || (ch.res_name && strstr(ch.res_name, r->prop)))
 267                 {
 268                         c->isfloating = r->isfloating;
 269                         if(r->tag) {
 270                                 matched_tag = True;
 271                                 c->tags[idxoftag(r->tag)] = selview->id;
 272                         }
 273                 }
 274         }
 275         if(ch.res_class)
 276                 XFree(ch.res_class);
 277         if(ch.res_name)
 278                 XFree(ch.res_name);
 279         if(!matched_tag)
 280                 memcpy(c->tags, seltags, sizeof initags);
 281 }
 282
 283
 284
 285 void
 286 arrange(void) {
 287         unsigned int i;
 288         Client *c;
 289
 290         for(c = clients; c; c = c->next)
 291                 if(isvisible(c))
 292                         unban(c);
 293                 else
 294                         ban(c);
 295
 296         for(i = 0; i < nviews; i++) {
 297                 views[i].layout->arrange(&views[i]);
 298                 restack(&views[i]);
 299         }
 300         focus(NULL);
 301 }
 302
 303 void
 304 attach(Client *c) {
 305         if(clients)
 306                 clients->prev = c;
 307         c->next = clients;
 308         clients = c;
 309 }
 310
 311 void
 312 attachstack(Client *c) {
 313         c->snext = stack;
 314         stack = c;
 315 }
 316
 317 void
 318 ban(Client *c) {
 319         if(c->isbanned)
 320                 return;
 321         XMoveWindow(dpy, c->win, c->x + 3 * getview(c)->w, c->y);
 322         c->isbanned = True;
 323 }
 324
 325 void
 326 buttonpress(XEvent *e) {
 327         unsigned int i, x;
 328         Client *c;
 329         XButtonPressedEvent *ev = &e->xbutton;
 330
 331         View *v = selview;
 332
 333         if(ev->window == v->barwin) {
 334                 x = 0;
 335                 for(i = 0; i < LENGTH(tags); i++) {
 336                         x += textw(tags[i]);
 337                         if(ev->x < x) {
 338                                 if(ev->button == Button1) {
 339                                         if(ev->state & MODKEY)
 340                                                 tag(tags[i]);
 341                                         else
 342                                                 view(tags[i]);
 343                                 }
 344                                 else if(ev->button == Button3) {
 345                                         if(ev->state & MODKEY)
 346                                                 toggletag(tags[i]);
 347                                         else
 348                                                 toggleview(tags[i]);
 349                                 }
 350                                 return;
 351                         }
 352                 }
 353                 if((ev->x < x + blw) && ev->button == Button1)
 354                         setlayout(NULL);
 355         }
 356         else if((c = getclient(ev->window))) {
 357                 focus(c);
 358                 if(CLEANMASK(ev->state) != MODKEY)
 359                         return;
 360                 if(ev->button == Button1) {
 361                         restack(getview(c));
 362                         movemouse(c);
 363                 }
 364                 else if(ev->button == Button2) {
 365                         if((floating != v->layout->arrange) && c->isfloating)
 366                                 togglefloating(NULL);
 367                         else
 368                                 zoom(NULL);
 369                 }
 370                 else if(ev->button == Button3 && !c->isfixed) {
 371                         restack(getview(c));
 372                         resizemouse(c);
 373                 }
 374         }
 375 }
 376
 377 void
 378 checkotherwm(void) {
 379         otherwm = False;
 380         XSetErrorHandler(xerrorstart);
 381
 382         /* this causes an error if some other window manager is running */
 383         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 384         XSync(dpy, False);
 385         if(otherwm)
 386                 eprint("dwm: another window manager is already running\n");
 387         XSync(dpy, False);
 388         XSetErrorHandler(NULL);
 389         xerrorxlib = XSetErrorHandler(xerror);
 390         XSync(dpy, False);
 391 }
 392
 393 void
 394 cleanup(void) {
 395         unsigned int i;
 396         close(STDIN_FILENO);
 397         while(stack) {
 398                 unban(stack);
 399                 unmanage(stack);
 400         }
 401         if(dc.font.set)
 402                 XFreeFontSet(dpy, dc.font.set);
 403         else
 404                 XFreeFont(dpy, dc.font.xfont);
 405
 406         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 407         XFreePixmap(dpy, dc.drawable);
 408         XFreeGC(dpy, dc.gc);
 409         XFreeCursor(dpy, cursor[CurNormal]);
 410         XFreeCursor(dpy, cursor[CurResize]);
 411         XFreeCursor(dpy, cursor[CurMove]);
 412         for(i = 0; i < nviews; i++)
 413                 XDestroyWindow(dpy, views[i].barwin);
 414         XSync(dpy, False);
 415         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 416 }
 417
 418 void
 419 configure(Client *c) {
 420         XConfigureEvent ce;
 421
 422         ce.type = ConfigureNotify;
 423         ce.display = dpy;
 424         ce.event = c->win;
 425         ce.window = c->win;
 426         ce.x = c->x;
 427         ce.y = c->y;
 428         ce.width = c->w;
 429         ce.height = c->h;
 430         ce.border_width = c->border;
 431         ce.above = None;
 432         ce.override_redirect = False;
 433         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 434 }
 435
 436 void
 437 configurenotify(XEvent *e) {
 438         XConfigureEvent *ev = &e->xconfigure;
 439         View *v = selview;
 440
 441         if(ev->window == root && (ev->width != v->w || ev->height != v->h)) {
 442                 /* TODO -- update Xinerama dimensions here */
 443                 v->w = ev->width;
 444                 v->h = ev->height;
 445                 XFreePixmap(dpy, dc.drawable);
 446                 dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(root, screen), bh, DefaultDepth(dpy, screen));
 447                 XResizeWindow(dpy, v->barwin, v->w, bh);
 448                 updatebarpos(v);
 449                 arrange();
 450         }
 451 }
 452
 453 void
 454 configurerequest(XEvent *e) {
 455         Client *c;
 456         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 457         XWindowChanges wc;
 458
 459         if((c = getclient(ev->window))) {
 460                 View *v = getview(c);
 461                 if(ev->value_mask & CWBorderWidth)
 462                         c->border = ev->border_width;
 463                 if(c->isfixed || c->isfloating || (floating == v->layout->arrange)) {
 464                         if(ev->value_mask & CWX)
 465                                 c->x = v->x + ev->x;
 466                         if(ev->value_mask & CWY)
 467                                 c->y = v->y + ev->y;
 468                         if(ev->value_mask & CWWidth)
 469                                 c->w = ev->width;
 470                         if(ev->value_mask & CWHeight)
 471                                 c->h = ev->height;
 472                         if((c->x - v->x + c->w) > v->w && c->isfloating)
 473                                 c->x = v->x + (v->w / 2 - c->w / 2); /* center in x direction */
 474                         if((c->y - v->y + c->h) > v->h && c->isfloating)
 475                                 c->y = v->y + (v->h / 2 - c->h / 2); /* center in y direction */
 476                         if((ev->value_mask & (CWX|CWY))
 477                         && !(ev->value_mask & (CWWidth|CWHeight)))
 478                                 configure(c);
 479                         if(isvisible(c))
 480                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 481                 }
 482                 else
 483                         configure(c);
 484         }
 485         else {
 486                 wc.x = ev->x;
 487                 wc.y = ev->y;
 488                 wc.width = ev->width;
 489                 wc.height = ev->height;
 490                 wc.border_width = ev->border_width;
 491                 wc.sibling = ev->above;
 492                 wc.stack_mode = ev->detail;
 493                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 494         }
 495         XSync(dpy, False);
 496 }
 497
 498 void
 499 destroynotify(XEvent *e) {
 500         Client *c;
 501         XDestroyWindowEvent *ev = &e->xdestroywindow;
 502
 503         if((c = getclient(ev->window)))
 504                 unmanage(c);
 505 }
 506
 507 void
 508 detach(Client *c) {
 509         if(c->prev)
 510                 c->prev->next = c->next;
 511         if(c->next)
 512                 c->next->prev = c->prev;
 513         if(c == clients)
 514                 clients = c->next;
 515         c->next = c->prev = NULL;
 516 }
 517
 518 void
 519 detachstack(Client *c) {
 520         Client **tc;
 521
 522         for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
 523         *tc = c->snext;
 524 }
 525
 526 void
 527 drawbar(View *v) {
 528         int i, x;
 529         Client *c;
 530
 531         dc.x = 0;
 532         for(c = stack; c && (!isvisible(c) || getview(c) != v); c = c->snext);
 533         for(i = 0; i < LENGTH(tags); i++) {
 534                 dc.w = textw(tags[i]);
 535                 if(seltags[i] && seltags[i] == v->id) {
 536                         drawtext(v, tags[i], dc.sel, isurgent(i));
 537                         drawsquare(v, c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
 538                 }
 539                 else {
 540                         drawtext(v, tags[i], dc.norm, isurgent(i));
 541                         drawsquare(v, c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
 542                 }
 543                 dc.x += dc.w;
 544         }
 545         dc.w = blw;
 546         drawtext(v, v->layout->symbol, dc.norm, False);
 547         x = dc.x + dc.w;
 548         if(v == selview) {
 549                 dc.w = textw(stext);
 550                 dc.x = v->w - dc.w;
 551                 if(dc.x < x) {
 552                         dc.x = x;
 553                         dc.w = v->w - x;
 554                 }
 555                 drawtext(v, stext, dc.norm, False);
 556         }
 557         else
 558                 dc.x = v->w;
 559         if((dc.w = dc.x - x) > bh) {
 560                 dc.x = x;
 561                 if(c) {
 562                         drawtext(v, c->name, dc.sel, False);
 563                         drawsquare(v, False, c->isfloating, False, dc.sel);
 564                 }
 565                 else
 566                         drawtext(v, NULL, dc.norm, False);
 567         }
 568         XCopyArea(dpy, dc.drawable, v->barwin, dc.gc, 0, 0, v->w, bh, 0, 0);
 569         XSync(dpy, False);
 570 }
 571
 572 void
 573 drawsquare(View *v, Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
 574         int x;
 575         XGCValues gcv;
 576         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 577
 578         gcv.foreground = col[invert ? ColBG : ColFG];
 579         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 580         x = (dc.font.ascent + dc.font.descent + 2) / 4;
 581         r.x = dc.x + 1;
 582         r.y = dc.y + 1;
 583         if(filled) {
 584                 r.width = r.height = x + 1;
 585                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 586         }
 587         else if(empty) {
 588                 r.width = r.height = x;
 589                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 590         }
 591 }
 592
 593 void
 594 drawtext(View *v, const char *text, unsigned long col[ColLast], Bool invert) {
 595         int x, y, w, h;
 596         unsigned int len, olen;
 597         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 598
 599         XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
 600         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 601         if(!text)
 602                 return;
 603         w = 0;
 604         olen = len = strlen(text);
 605         if(len >= sizeof buf)
 606                 len = sizeof buf - 1;
 607         memcpy(buf, text, len);
 608         buf[len] = 0;
 609         h = dc.font.ascent + dc.font.descent;
 610         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 611         x = dc.x + (h / 2);
 612         /* shorten text if necessary */
 613         while(len && (w = textnw(buf, len)) > dc.w - h)
 614                 buf[--len] = 0;
 615         if(len < olen) {
 616                 if(len > 1)
 617                         buf[len - 1] = '.';
 618                 if(len > 2)
 619                         buf[len - 2] = '.';
 620                 if(len > 3)
 621                         buf[len - 3] = '.';
 622         }
 623         if(w > dc.w)
 624                 return; /* too long */
 625         XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
 626         if(dc.font.set)
 627                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 628         else
 629                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 630 }
 631
 632 void *
 633 emallocz(unsigned int size) {
 634         void *res = calloc(1, size);
 635
 636         if(!res)
 637                 eprint("fatal: could not malloc() %u bytes\n", size);
 638         return res;
 639 }
 640
 641 void
 642 enternotify(XEvent *e) {
 643         Client *c;
 644         XCrossingEvent *ev = &e->xcrossing;
 645
 646         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior) {
 647                 if(!isxinerama || ev->window != root)
 648                         return;
 649         }
 650         if((c = getclient(ev->window)))
 651                 focus(c);
 652         else
 653                 focus(NULL);
 654 }
 655
 656 void
 657 eprint(const char *errstr, ...) {
 658         va_list ap;
 659
 660         va_start(ap, errstr);
 661         vfprintf(stderr, errstr, ap);
 662         va_end(ap);
 663         exit(EXIT_FAILURE);
 664 }
 665
 666 void
 667 expose(XEvent *e) {
 668         View *v;
 669         XExposeEvent *ev = &e->xexpose;
 670
 671         if(ev->count == 0 && (v = getviewbar(ev->window)))
 672                 drawbar(v);
 673 }
 674
 675 void
 676 floating(View *v) { /* default floating layout */
 677         Client *c;
 678
 679         domwfact = dozoom = False;
 680         for(c = clients; c; c = c->next)
 681                 if(isvisible(c))
 682                         resize(c, c->x, c->y, c->w, c->h, True);
 683 }
 684
 685 void
 686 focus(Client *c) {
 687         View *v = selview;
 688         if(c)
 689                 selview = getview(c);
 690         else
 691                 selview = viewat();
 692         if(selview != v)
 693                 drawbar(v);
 694         if(!c || (c && !isvisible(c)))
 695                 for(c = stack; c && (!isvisible(c) || getview(c) != selview); c = c->snext);
 696         if(sel && sel != c) {
 697                 grabbuttons(sel, False);
 698                 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
 699         }
 700         if(c) {
 701                 detachstack(c);
 702                 attachstack(c);
 703                 grabbuttons(c, True);
 704         }
 705         sel = c;
 706         if(c) {
 707                 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
 708                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
 709                 selview = getview(c);
 710         }
 711         else
 712                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 713         drawbar(selview);
 714 }
 715
 716 void
 717 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 718         XFocusChangeEvent *ev = &e->xfocus;
 719
 720         if(sel && ev->window != sel->win)
 721                 XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
 722 }
 723
 724 void
 725 focusnext(const char *arg) {
 726         Client *c;
 727
 728         if(!sel)
 729                 return;
 730         for(c = sel->next; c && !isvisible(c); c = c->next);
 731         if(!c)
 732                 for(c = clients; c && !isvisible(c); c = c->next);
 733         if(c) {
 734                 focus(c);
 735                 restack(getview(c));
 736         }
 737 }
 738
 739 void
 740 focusprev(const char *arg) {
 741         Client *c;
 742
 743         if(!sel)
 744                 return;
 745         for(c = sel->prev; c && !isvisible(c); c = c->prev);
 746         if(!c) {
 747                 for(c = clients; c && c->next; c = c->next);
 748                 for(; c && !isvisible(c); c = c->prev);
 749         }
 750         if(c) {
 751                 focus(c);
 752                 restack(getview(c));
 753         }
 754 }
 755
 756 Client *
 757 getclient(Window w) {
 758         Client *c;
 759
 760         for(c = clients; c && c->win != w; c = c->next);
 761         return c;
 762 }
 763
 764 unsigned long
 765 getcolor(const char *colstr) {
 766         Colormap cmap = DefaultColormap(dpy, screen);
 767         XColor color;
 768
 769         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 770                 eprint("error, cannot allocate color '%s'\n", colstr);
 771         return color.pixel;
 772 }
 773
 774 View *
 775 getviewbar(Window barwin) {
 776         unsigned int i;
 777
 778         for(i = 0; i < nviews; i++)
 779                 if(views[i].barwin == barwin)
 780                         return &views[i];
 781         return NULL;
 782 }
 783
 784 View *
 785 getview(Client *c) {
 786         unsigned int i;
 787
 788         for(i = 0; i < LENGTH(tags); i++)
 789                 if(c->tags[i])
 790                         return &views[c->tags[i] - 1];
 791         return &views[0]; /* fallback */
 792 }
 793
 794 long
 795 getstate(Window w) {
 796         int format, status;
 797         long result = -1;
 798         unsigned char *p = NULL;
 799         unsigned long n, extra;
 800         Atom real;
 801
 802         status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 803                         &real, &format, &n, &extra, (unsigned char **)&p);
 804         if(status != Success)
 805                 return -1;
 806         if(n != 0)
 807                 result = *p;
 808         XFree(p);
 809         return result;
 810 }
 811
 812 Bool
 813 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 814         char **list = NULL;
 815         int n;
 816         XTextProperty name;
 817
 818         if(!text || size == 0)
 819                 return False;
 820         text[0] = '\0';
 821         XGetTextProperty(dpy, w, &name, atom);
 822         if(!name.nitems)
 823                 return False;
 824         if(name.encoding == XA_STRING)
 825                 strncpy(text, (char *)name.value, size - 1);
 826         else {
 827                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 828                 && n > 0 && *list) {
 829                         strncpy(text, *list, size - 1);
 830                         XFreeStringList(list);
 831                 }
 832         }
 833         text[size - 1] = '\0';
 834         XFree(name.value);
 835         return True;
 836 }
 837
 838 void
 839 grabbuttons(Client *c, Bool focused) {
 840         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 841
 842         if(focused) {
 843                 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
 844                                 GrabModeAsync, GrabModeSync, None, None);
 845                 XGrabButton(dpy, Button1, MODKEY|LockMask, c->win, False, BUTTONMASK,
 846                                 GrabModeAsync, GrabModeSync, None, None);
 847                 XGrabButton(dpy, Button1, MODKEY|numlockmask, c->win, False, BUTTONMASK,
 848                                 GrabModeAsync, GrabModeSync, None, None);
 849                 XGrabButton(dpy, Button1, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
 850                                 GrabModeAsync, GrabModeSync, None, None);
 851
 852                 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
 853                                 GrabModeAsync, GrabModeSync, None, None);
 854                 XGrabButton(dpy, Button2, MODKEY|LockMask, c->win, False, BUTTONMASK,
 855                                 GrabModeAsync, GrabModeSync, None, None);
 856                 XGrabButton(dpy, Button2, MODKEY|numlockmask, c->win, False, BUTTONMASK,
 857                                 GrabModeAsync, GrabModeSync, None, None);
 858                 XGrabButton(dpy, Button2, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
 859                                 GrabModeAsync, GrabModeSync, None, None);
 860
 861                 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
 862                                 GrabModeAsync, GrabModeSync, None, None);
 863                 XGrabButton(dpy, Button3, MODKEY|LockMask, c->win, False, BUTTONMASK,
 864                                 GrabModeAsync, GrabModeSync, None, None);
 865                 XGrabButton(dpy, Button3, MODKEY|numlockmask, c->win, False, BUTTONMASK,
 866                                 GrabModeAsync, GrabModeSync, None, None);
 867                 XGrabButton(dpy, Button3, MODKEY|numlockmask|LockMask, c->win, False, BUTTONMASK,
 868                                 GrabModeAsync, GrabModeSync, None, None);
 869         }
 870         else
 871                 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
 872                                 GrabModeAsync, GrabModeSync, None, None);
 873 }
 874
 875 void
 876 grabkeys(void)  {
 877         unsigned int i, j;
 878         KeyCode code;
 879         XModifierKeymap *modmap;
 880
 881         /* init modifier map */
 882         modmap = XGetModifierMapping(dpy);
 883         for(i = 0; i < 8; i++)
 884                 for(j = 0; j < modmap->max_keypermod; j++) {
 885                         if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
 886                                 numlockmask = (1 << i);
 887                 }
 888         XFreeModifiermap(modmap);
 889
 890         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 891         for(i = 0; i < LENGTH(keys); i++) {
 892                 code = XKeysymToKeycode(dpy, keys[i].keysym);
 893                 XGrabKey(dpy, code, keys[i].mod, root, True,
 894                                 GrabModeAsync, GrabModeAsync);
 895                 XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
 896                                 GrabModeAsync, GrabModeAsync);
 897                 XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
 898                                 GrabModeAsync, GrabModeAsync);
 899                 XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
 900                                 GrabModeAsync, GrabModeAsync);
 901         }
 902 }
 903
 904 unsigned int
 905 idxoftag(const char *tag) {
 906         unsigned int i;
 907
 908         for(i = 0; (i < LENGTH(tags)) && (tags[i] != tag); i++);
 909         return (i < LENGTH(tags)) ? i : 0;
 910 }
 911
 912 void
 913 initfont(const char *fontstr) {
 914         char *def, **missing;
 915         int i, n;
 916
 917         missing = NULL;
 918         if(dc.font.set)
 919                 XFreeFontSet(dpy, dc.font.set);
 920         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 921         if(missing) {
 922                 while(n--)
 923                         fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
 924                 XFreeStringList(missing);
 925         }
 926         if(dc.font.set) {
 927                 XFontSetExtents *font_extents;
 928                 XFontStruct **xfonts;
 929                 char **font_names;
 930                 dc.font.ascent = dc.font.descent = 0;
 931                 font_extents = XExtentsOfFontSet(dc.font.set);
 932                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 933                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 934                         if(dc.font.ascent < (*xfonts)->ascent)
 935                                 dc.font.ascent = (*xfonts)->ascent;
 936                         if(dc.font.descent < (*xfonts)->descent)
 937                                 dc.font.descent = (*xfonts)->descent;
 938                         xfonts++;
 939                 }
 940         }
 941         else {
 942                 if(dc.font.xfont)
 943                         XFreeFont(dpy, dc.font.xfont);
 944                 dc.font.xfont = NULL;
 945                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
 946                 && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
 947                         eprint("error, cannot load font: '%s'\n", fontstr);
 948                 dc.font.ascent = dc.font.xfont->ascent;
 949                 dc.font.descent = dc.font.xfont->descent;
 950         }
 951         dc.font.height = dc.font.ascent + dc.font.descent;
 952 }
 953
 954 Bool
 955 isoccupied(unsigned int t) {
 956         Client *c;
 957
 958         for(c = clients; c; c = c->next)
 959                 if(c->tags[t])
 960                         return True;
 961         return False;
 962 }
 963
 964 Bool
 965 isprotodel(Client *c) {
 966         int i, n;
 967         Atom *protocols;
 968         Bool ret = False;
 969
 970         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
 971                 for(i = 0; !ret && i < n; i++)
 972                         if(protocols[i] == wmatom[WMDelete])
 973                                 ret = True;
 974                 XFree(protocols);
 975         }
 976         return ret;
 977 }
 978
 979 Bool
 980 isurgent(unsigned int t) {
 981         Client *c;
 982
 983         for(c = clients; c; c = c->next)
 984                 if(c->isurgent && c->tags[t])
 985                         return True;
 986         return False;
 987 }
 988
 989 Bool
 990 isvisible(Client *c) {
 991         unsigned int i;
 992
 993         for(i = 0; i < LENGTH(tags); i++)
 994                 if(c->tags[i] && seltags[i])
 995                         return True;
 996         return False;
 997 }
 998
 999 void
1000 keypress(XEvent *e) {
1001         unsigned int i;
1002         KeySym keysym;
1003         XKeyEvent *ev;
1004
1005         ev = &e->xkey;
1006         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1007         for(i = 0; i < LENGTH(keys); i++)
1008                 if(keysym == keys[i].keysym
1009                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
1010                 {
1011                         if(keys[i].func)
1012                                 keys[i].func(keys[i].arg);
1013                 }
1014 }
1015
1016 void
1017 killclient(const char *arg) {
1018         XEvent ev;
1019
1020         if(!sel)
1021                 return;
1022         if(isprotodel(sel)) {
1023                 ev.type = ClientMessage;
1024                 ev.xclient.window = sel->win;
1025                 ev.xclient.message_type = wmatom[WMProtocols];
1026                 ev.xclient.format = 32;
1027                 ev.xclient.data.l[0] = wmatom[WMDelete];
1028                 ev.xclient.data.l[1] = CurrentTime;
1029                 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
1030         }
1031         else
1032                 XKillClient(dpy, sel->win);
1033 }
1034
1035 void
1036 manage(Window w, XWindowAttributes *wa) {
1037         Client *c, *t = NULL;
1038         View *v;
1039         Status rettrans;
1040         Window trans;
1041         XWindowChanges wc;
1042
1043         c = emallocz(sizeof(Client));
1044         c->tags = emallocz(sizeof initags);
1045         c->win = w;
1046
1047         applyrules(c);
1048
1049         v = getview(c);
1050
1051         c->x = wa->x + v->x;
1052         c->y = wa->y + v->y;
1053         c->w = wa->width;
1054         c->h = wa->height;
1055         c->oldborder = wa->border_width;
1056
1057         if(c->w == v->w && c->h == v->h) {
1058                 c->x = v->x;
1059                 c->y = v->y;
1060                 c->border = wa->border_width;
1061         }
1062         else {
1063                 if(c->x + c->w + 2 * c->border > v->wax + v->waw)
1064                         c->x = v->wax + v->waw - c->w - 2 * c->border;
1065                 if(c->y + c->h + 2 * c->border > v->way + v->wah)
1066                         c->y = v->way + v->wah - c->h - 2 * c->border;
1067                 if(c->x < v->wax)
1068                         c->x = v->wax;
1069                 if(c->y < v->way)
1070                         c->y = v->way;
1071                 c->border = BORDERPX;
1072         }
1073         wc.border_width = c->border;
1074         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1075         XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1076         configure(c); /* propagates border_width, if size doesn't change */
1077         updatesizehints(c);
1078         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1079         grabbuttons(c, False);
1080         updatetitle(c);
1081         if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1082                 for(t = clients; t && t->win != trans; t = t->next);
1083         if(t)
1084                 memcpy(c->tags, t->tags, sizeof initags);
1085         if(!c->isfloating)
1086                 c->isfloating = (rettrans == Success) || c->isfixed;
1087         attach(c);
1088         attachstack(c);
1089         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1090         ban(c);
1091         XMapWindow(dpy, c->win);
1092         setclientstate(c, NormalState);
1093         arrange();
1094 }
1095
1096 void
1097 mappingnotify(XEvent *e) {
1098         XMappingEvent *ev = &e->xmapping;
1099
1100         XRefreshKeyboardMapping(ev);
1101         if(ev->request == MappingKeyboard)
1102                 grabkeys();
1103 }
1104
1105 void
1106 maprequest(XEvent *e) {
1107         static XWindowAttributes wa;
1108         XMapRequestEvent *ev = &e->xmaprequest;
1109
1110         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1111                 return;
1112         if(wa.override_redirect)
1113                 return;
1114         if(!getclient(ev->window))
1115                 manage(ev->window, &wa);
1116 }
1117
1118 void
1119 movemouse(Client *c) {
1120         int x1, y1, ocx, ocy, di, nx, ny;
1121         unsigned int dui;
1122         View *v;
1123         Window dummy;
1124         XEvent ev;
1125
1126         ocx = nx = c->x;
1127         ocy = ny = c->y;
1128         v = getview(c);
1129         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1130                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
1131                 return;
1132         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1133         for(;;) {
1134                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1135                 switch (ev.type) {
1136                 case ButtonRelease:
1137                         XUngrabPointer(dpy, CurrentTime);
1138                         return;
1139                 case ConfigureRequest:
1140                 case Expose:
1141                 case MapRequest:
1142                         handler[ev.type](&ev);
1143                         break;
1144                 case MotionNotify:
1145                         XSync(dpy, False);
1146                         nx = ocx + (ev.xmotion.x - x1);
1147                         ny = ocy + (ev.xmotion.y - y1);
1148                         if(abs(v->wax - nx) < SNAP)
1149                                 nx = v->wax;
1150                         else if(abs((v->wax + v->waw) - (nx + c->w + 2 * c->border)) < SNAP)
1151                                 nx = v->wax + v->waw - c->w - 2 * c->border;
1152                         if(abs(v->way - ny) < SNAP)
1153                                 ny = v->way;
1154                         else if(abs((v->way + v->wah) - (ny + c->h + 2 * c->border)) < SNAP)
1155                                 ny = v->way + v->wah - c->h - 2 * c->border;
1156                         if(!c->isfloating && (v->layout->arrange != floating) && (abs(nx - c->x) > SNAP || abs(ny - c->y) > SNAP))
1157                                 togglefloating(NULL);
1158                         if((v->layout->arrange == floating) || c->isfloating)
1159                                 resize(c, nx, ny, c->w, c->h, False);
1160                         break;
1161                 }
1162         }
1163 }
1164
1165 Client *
1166 nexttiled(Client *c, View *v) {
1167         for(; c && (c->isfloating || getview(c) != v || !isvisible(c)); c = c->next);
1168         return c;
1169 }
1170
1171 void
1172 propertynotify(XEvent *e) {
1173         Client *c;
1174         Window trans;
1175         XPropertyEvent *ev = &e->xproperty;
1176
1177         if(ev->state == PropertyDelete)
1178                 return; /* ignore */
1179         if((c = getclient(ev->window))) {
1180                 switch (ev->atom) {
1181                 default: break;
1182                 case XA_WM_TRANSIENT_FOR:
1183                         XGetTransientForHint(dpy, c->win, &trans);
1184                         if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1185                                 arrange();
1186                         break;
1187                 case XA_WM_NORMAL_HINTS:
1188                         updatesizehints(c);
1189                         break;
1190                 case XA_WM_HINTS:
1191                         updatewmhints(c);
1192                         drawbar(getview(c));
1193                         break;
1194                 }
1195                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1196                         updatetitle(c);
1197                         if(c == sel)
1198                                 drawbar(selview);
1199                 }
1200         }
1201 }
1202
1203 void
1204 quit(const char *arg) {
1205         readin = running = False;
1206 }
1207
1208 void
1209 reapply(const char *arg) {
1210         static Bool zerotags[LENGTH(tags)] = { 0 };
1211         Client *c;
1212
1213         for(c = clients; c; c = c->next) {
1214                 memcpy(c->tags, zerotags, sizeof zerotags);
1215                 applyrules(c);
1216         }
1217         arrange();
1218 }
1219
1220 void
1221 resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1222         View *v;
1223         XWindowChanges wc;
1224
1225         v = getview(c);
1226         if(sizehints) {
1227                 /* set minimum possible */
1228                 if (w < 1)
1229                         w = 1;
1230                 if (h < 1)
1231                         h = 1;
1232
1233                 /* temporarily remove base dimensions */
1234                 w -= c->basew;
1235                 h -= c->baseh;
1236
1237                 /* adjust for aspect limits */
1238                 if (c->minay > 0 && c->maxay > 0 && c->minax > 0 && c->maxax > 0) {
1239                         if (w * c->maxay > h * c->maxax)
1240                                 w = h * c->maxax / c->maxay;
1241                         else if (w * c->minay < h * c->minax)
1242                                 h = w * c->minay / c->minax;
1243                 }
1244
1245                 /* adjust for increment value */
1246                 if(c->incw)
1247                         w -= w % c->incw;
1248                 if(c->inch)
1249                         h -= h % c->inch;
1250
1251                 /* restore base dimensions */
1252                 w += c->basew;
1253                 h += c->baseh;
1254
1255                 if(c->minw > 0 && w < c->minw)
1256                         w = c->minw;
1257                 if(c->minh > 0 && h < c->minh)
1258                         h = c->minh;
1259                 if(c->maxw > 0 && w > c->maxw)
1260                         w = c->maxw;
1261                 if(c->maxh > 0 && h > c->maxh)
1262                         h = c->maxh;
1263         }
1264         if(w <= 0 || h <= 0)
1265                 return;
1266         if(x > v->x + v->w)
1267                 x = v->w - w - 2 * c->border;
1268         if(y > v->y + v->h)
1269                 y = v->h - h - 2 * c->border;
1270         if(x + w + 2 * c->border < v->x)
1271                 x = v->x;
1272         if(y + h + 2 * c->border < v->y)
1273                 y = v->y;
1274         if(c->x != x || c->y != y || c->w != w || c->h != h) {
1275                 c->x = wc.x = x;
1276                 c->y = wc.y = y;
1277                 c->w = wc.width = w;
1278                 c->h = wc.height = h;
1279                 wc.border_width = c->border;
1280                 XConfigureWindow(dpy, c->win,
1281                                 CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1282                 configure(c);
1283                 XSync(dpy, False);
1284         }
1285 }
1286
1287 void
1288 resizemouse(Client *c) {
1289         int ocx, ocy;
1290         int nw, nh;
1291         View *v;
1292         XEvent ev;
1293
1294         ocx = c->x;
1295         ocy = c->y;
1296         v = getview(c);
1297         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1298                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
1299                 return;
1300         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1301         for(;;) {
1302                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
1303                 switch(ev.type) {
1304                 case ButtonRelease:
1305                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1306                                         c->w + c->border - 1, c->h + c->border - 1);
1307                         XUngrabPointer(dpy, CurrentTime);
1308                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1309                         return;
1310                 case ConfigureRequest:
1311                 case Expose:
1312                 case MapRequest:
1313                         handler[ev.type](&ev);
1314                         break;
1315                 case MotionNotify:
1316                         XSync(dpy, False);
1317                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1318                                 nw = 1;
1319                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1320                                 nh = 1;
1321                         if(!c->isfloating && (v->layout->arrange != floating) && (abs(nw - c->w) > SNAP || abs(nh - c->h) > SNAP))
1322                                 togglefloating(NULL);
1323                         if((v->layout->arrange == floating) || c->isfloating)
1324                                 resize(c, c->x, c->y, nw, nh, True);
1325                         break;
1326                 }
1327         }
1328 }
1329
1330 void
1331 restack(View *v) {
1332         Client *c;
1333         XEvent ev;
1334         XWindowChanges wc;
1335
1336         drawbar(v);
1337         if(!sel)
1338                 return;
1339         if(sel->isfloating || (v->layout->arrange == floating))
1340                 XRaiseWindow(dpy, sel->win);
1341         if(v->layout->arrange != floating) {
1342                 wc.stack_mode = Below;
1343                 wc.sibling = v->barwin;
1344                 if(!sel->isfloating) {
1345                         XConfigureWindow(dpy, sel->win, CWSibling|CWStackMode, &wc);
1346                         wc.sibling = sel->win;
1347                 }
1348                 for(c = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1349                         if(c == sel)
1350                                 continue;
1351                         XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1352                         wc.sibling = c->win;
1353                 }
1354         }
1355         XSync(dpy, False);
1356         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1357 }
1358
1359 void
1360 run(void) {
1361         char *p;
1362         char sbuf[sizeof stext];
1363         fd_set rd;
1364         int r, xfd;
1365         unsigned int len, offset;
1366         XEvent ev;
1367
1368         /* main event loop, also reads status text from stdin */
1369         XSync(dpy, False);
1370         xfd = ConnectionNumber(dpy);
1371         readin = True;
1372         offset = 0;
1373         len = sizeof stext - 1;
1374         sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
1375         while(running) {
1376                 FD_ZERO(&rd);
1377                 if(readin)
1378                         FD_SET(STDIN_FILENO, &rd);
1379                 FD_SET(xfd, &rd);
1380                 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1381                         if(errno == EINTR)
1382                                 continue;
1383                         eprint("select failed\n");
1384                 }
1385                 if(FD_ISSET(STDIN_FILENO, &rd)) {
1386                         switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) {
1387                         case -1:
1388                                 strncpy(stext, strerror(errno), len);
1389                                 readin = False;
1390                                 break;
1391                         case 0:
1392                                 strncpy(stext, "EOF", 4);
1393                                 readin = False;
1394                                 break;
1395                         default:
1396                                 for(p = sbuf + offset; r > 0; p++, r--, offset++)
1397                                         if(*p == '\n' || *p == '\0') {
1398                                                 *p = '\0';
1399                                                 strncpy(stext, sbuf, len);
1400                                                 p += r - 1; /* p is sbuf + offset + r - 1 */
1401                                                 for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
1402                                                 offset = r;
1403                                                 if(r)
1404                                                         memmove(sbuf, p - r + 1, r);
1405                                                 break;
1406                                         }
1407                                 break;
1408                         }
1409                         drawbar(selview);
1410                 }
1411                 while(XPending(dpy)) {
1412                         XNextEvent(dpy, &ev);
1413                         if(handler[ev.type])
1414                                 (handler[ev.type])(&ev); /* call handler */
1415                 }
1416         }
1417 }
1418
1419 void
1420 scan(void) {
1421         unsigned int i, num;
1422         Window *wins, d1, d2;
1423         XWindowAttributes wa;
1424
1425         wins = NULL;
1426         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1427                 for(i = 0; i < num; i++) {
1428                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1429                                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1430                                 continue;
1431                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1432                                 manage(wins[i], &wa);
1433                 }
1434                 for(i = 0; i < num; i++) { /* now the transients */
1435                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1436                                 continue;
1437                         if(XGetTransientForHint(dpy, wins[i], &d1)
1438                                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1439                                 manage(wins[i], &wa);
1440                 }
1441         }
1442         if(wins)
1443                 XFree(wins);
1444 }
1445
1446 void
1447 setclientstate(Client *c, long state) {
1448         long data[] = {state, None};
1449
1450         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1451                         PropModeReplace, (unsigned char *)data, 2);
1452 }
1453
1454 void
1455 setlayout(const char *arg) {
1456         unsigned int i;
1457         View *v = selview;
1458
1459         if(!arg) {
1460                 v->layout++;
1461                 if(v->layout == &layouts[LENGTH(layouts)])
1462                         v->layout = &layouts[0];
1463         }
1464         else {
1465                 for(i = 0; i < LENGTH(layouts); i++)
1466                         if(!strcmp(arg, layouts[i].symbol))
1467                                 break;
1468                 if(i == LENGTH(layouts))
1469                         return;
1470                 v->layout = &layouts[i];
1471         }
1472         if(sel)
1473                 arrange();
1474         else
1475                 drawbar(v);
1476 }
1477
1478 void
1479 setmwfact(const char *arg) {
1480         double delta;
1481
1482         View *v = selview;
1483
1484         if(!domwfact)
1485                 return;
1486         /* arg handling, manipulate mwfact */
1487         if(arg == NULL)
1488                 v->mwfact = MWFACT;
1489         else if(sscanf(arg, "%lf", &delta) == 1) {
1490                 if(arg[0] == '+' || arg[0] == '-')
1491                         v->mwfact += delta;
1492                 else
1493                         v->mwfact = delta;
1494                 if(v->mwfact < 0.1)
1495                         v->mwfact = 0.1;
1496                 else if(v->mwfact > 0.9)
1497                         v->mwfact = 0.9;
1498         }
1499         arrange();
1500 }
1501
1502 void
1503 setup(void) {
1504         unsigned int i;
1505         View *v;
1506         XSetWindowAttributes wa;
1507         XineramaScreenInfo *info = NULL;
1508
1509         /* init atoms */
1510         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1511         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1512         wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1513         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1514         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1515         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1516
1517         /* init cursors */
1518         wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1519         cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1520         cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1521
1522         if((isxinerama = XineramaIsActive(dpy)))
1523                 info = XineramaQueryScreens(dpy, &nviews);
1524 #if defined(AIM_XINERAMA)
1525 isxinerama = True;
1526 nviews = 2; /* aim Xinerama */
1527 #endif
1528         selview = views = emallocz(nviews * sizeof(View));
1529
1530         screen = DefaultScreen(dpy);
1531         root = RootWindow(dpy, screen);
1532
1533         /* init appearance */
1534         dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1535         dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1536         dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1537         dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1538         dc.sel[ColBG] = getcolor(SELBGCOLOR);
1539         dc.sel[ColFG] = getcolor(SELFGCOLOR);
1540         initfont(FONT);
1541         dc.h = bh = dc.font.height + 2;
1542         dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
1543         dc.gc = XCreateGC(dpy, root, 0, 0);
1544         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1545         if(!dc.font.set)
1546                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1547
1548         for(blw = i = 0; i < LENGTH(layouts); i++) {
1549                 i = textw(layouts[i].symbol);
1550                 if(i > blw)
1551                         blw = i;
1552         }
1553
1554         seltags = emallocz(sizeof initags);
1555         prevtags = emallocz(sizeof initags);
1556         memcpy(seltags, initags, sizeof initags);
1557         memcpy(prevtags, initags, sizeof initags);
1558
1559         for(i = 0; i < nviews; i++) {
1560                 /* init geometry */
1561                 v = &views[i];
1562                 v->id = i + 1;
1563
1564                 if(nviews != 1 && isxinerama) {
1565
1566 #if defined(AIM_XINERAMA)
1567 v->w = DisplayWidth(dpy, screen) / 2;
1568 v->x = (i == 0) ? 0 : v->w;
1569 v->y = 0;
1570 v->h = DisplayHeight(dpy, screen);
1571 #else
1572                         v->x = info[i].x_org;
1573                         v->y = info[i].y_org;
1574                         v->w = info[i].width;
1575                         v->h = info[i].height;
1576 #endif
1577                 }
1578                 else {
1579                         v->x = 0;
1580                         v->y = 0;
1581                         v->w = DisplayWidth(dpy, screen);
1582                         v->h = DisplayHeight(dpy, screen);
1583                 }
1584
1585                 /* init layouts */
1586                 v->mwfact = MWFACT;
1587                 v->layout = &layouts[0];
1588
1589                 // TODO: bpos per screen?
1590                 bpos = BARPOS;
1591                 wa.override_redirect = 1;
1592                 wa.background_pixmap = ParentRelative;
1593                 wa.event_mask = ButtonPressMask|ExposureMask;
1594
1595                 /* init bars */
1596                 v->barwin = XCreateWindow(dpy, root, v->x, v->y, v->w, bh, 0,
1597                                 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1598                                 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1599                 XDefineCursor(dpy, v->barwin, cursor[CurNormal]);
1600                 updatebarpos(v);
1601                 XMapRaised(dpy, v->barwin);
1602                 strcpy(stext, "dwm-"VERSION);
1603
1604                 /* EWMH support per view */
1605                 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1606                                 PropModeReplace, (unsigned char *) netatom, NetLast);
1607
1608                 /* select for events */
1609                 wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1610                                 |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
1611                 XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1612                 XSelectInput(dpy, root, wa.event_mask);
1613
1614                 drawbar(v);
1615         }
1616         if(info)
1617                 XFree(info);
1618
1619         /* grab keys */
1620         grabkeys();
1621
1622         selview = &views[0];
1623 }
1624
1625 void
1626 spawn(const char *arg) {
1627         static char *shell = NULL;
1628
1629         if(!shell && !(shell = getenv("SHELL")))
1630                 shell = "/bin/sh";
1631         if(!arg)
1632                 return;
1633         /* The double-fork construct avoids zombie processes and keeps the code
1634          * clean from stupid signal handlers. */
1635         if(fork() == 0) {
1636                 if(fork() == 0) {
1637                         if(dpy)
1638                                 close(ConnectionNumber(dpy));
1639                         setsid();
1640                         execl(shell, shell, "-c", arg, (char *)NULL);
1641                         fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1642                         perror(" failed");
1643                 }
1644                 exit(0);
1645         }
1646         wait(0);
1647 }
1648
1649 void
1650 tag(const char *arg) {
1651         unsigned int i;
1652
1653         if(!sel)
1654                 return;
1655         for(i = 0; i < LENGTH(tags); i++)
1656                 sel->tags[i] = (NULL == arg) ? selview->id : 0;
1657         sel->tags[idxoftag(arg)] = selview->id;
1658         arrange();
1659 }
1660
1661 unsigned int
1662 textnw(const char *text, unsigned int len) {
1663         XRectangle r;
1664
1665         if(dc.font.set) {
1666                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1667                 return r.width;
1668         }
1669         return XTextWidth(dc.font.xfont, text, len);
1670 }
1671
1672 unsigned int
1673 textw(const char *text) {
1674         return textnw(text, strlen(text)) + dc.font.height;
1675 }
1676
1677 void
1678 tile(View *v) {
1679         unsigned int i, n, nx, ny, nw, nh, mw, th;
1680         Client *c, *mc;
1681
1682         domwfact = dozoom = True;
1683         nx = v->wax;
1684         ny = v->way;
1685         nw = 0;
1686         for(n = 0, c = nexttiled(clients, v); c; c = nexttiled(c->next, v))
1687                 n++;
1688
1689         /* window geoms */
1690         mw = (n == 1) ? v->waw : v->mwfact * v->waw;
1691         th = (n > 1) ? v->wah / (n - 1) : 0;
1692         if(n > 1 && th < bh)
1693                 th = v->wah;
1694
1695         for(i = 0, c = mc = nexttiled(clients, v); c; c = nexttiled(c->next, v)) {
1696                 if(i == 0) { /* master */
1697                         nx = v->wax;
1698                         ny = v->way;
1699                         nw = mw - 2 * c->border;
1700                         nh = v->wah - 2 * c->border;
1701                 }
1702                 else {  /* tile window */
1703                         if(i == 1) {
1704                                 ny = v->way;
1705                                 nx += mc->w + 2 * mc->border;
1706                                 nw = v->waw - mw - 2 * c->border;
1707                         }
1708                         if(i + 1 == n) /* remainder */
1709                                 nh = (v->way + v->wah) - ny - 2 * c->border;
1710                         else
1711                                 nh = th - 2 * c->border;
1712                 }
1713                 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1714                 if((RESIZEHINTS) && ((c->h < bh) || (c->h > nh) || (c->w < bh) || (c->w > nw)))
1715                         /* client doesn't accept size constraints */
1716                         resize(c, nx, ny, nw, nh, False);
1717                 if(n > 1 && th != v->wah)
1718                         ny = c->y + c->h + 2 * c->border;
1719                 i++;
1720         }
1721 }
1722
1723 void
1724 togglebar(const char *arg) {
1725         if(bpos == BarOff)
1726                 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1727         else
1728                 bpos = BarOff;
1729         updatebarpos(selview);
1730         arrange();
1731 }
1732
1733 void
1734 togglefloating(const char *arg) {
1735         if(!sel)
1736                 return;
1737         sel->isfloating = !sel->isfloating;
1738         if(sel->isfloating)
1739                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1740         arrange();
1741 }
1742
1743 void
1744 toggletag(const char *arg) {
1745         unsigned int i, j;
1746
1747         if(!sel)
1748                 return;
1749         i = idxoftag(arg);
1750         sel->tags[i] = !sel->tags[i];
1751         for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
1752         if(j == LENGTH(tags))
1753                 sel->tags[i] = selview->id; /* at least one tag must be enabled */
1754         arrange();
1755 }
1756
1757 void
1758 toggleview(const char *arg) {
1759         unsigned int i, j;
1760
1761         i = idxoftag(arg);
1762         seltags[i] = !seltags[i];
1763         for(j = 0; j < LENGTH(tags) && !seltags[j]; j++);
1764         if(j == LENGTH(tags))
1765                 seltags[i] = selview->id; /* at least one tag must be viewed */
1766         arrange();
1767 }
1768
1769 void
1770 unban(Client *c) {
1771         if(!c->isbanned)
1772                 return;
1773         XMoveWindow(dpy, c->win, c->x, c->y);
1774         c->isbanned = False;
1775 }
1776
1777 void
1778 unmanage(Client *c) {
1779         XWindowChanges wc;
1780
1781         wc.border_width = c->oldborder;
1782         /* The server grab construct avoids race conditions. */
1783         XGrabServer(dpy);
1784         XSetErrorHandler(xerrordummy);
1785         XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1786         detach(c);
1787         detachstack(c);
1788         if(sel == c)
1789                 focus(NULL);
1790         XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1791         setclientstate(c, WithdrawnState);
1792         free(c->tags);
1793         free(c);
1794         XSync(dpy, False);
1795         XSetErrorHandler(xerror);
1796         XUngrabServer(dpy);
1797         arrange();
1798 }
1799
1800 void
1801 unmapnotify(XEvent *e) {
1802         Client *c;
1803         XUnmapEvent *ev = &e->xunmap;
1804
1805         if((c = getclient(ev->window)))
1806                 unmanage(c);
1807 }
1808
1809 void
1810 updatebarpos(View *v) {
1811         XEvent ev;
1812
1813         v->wax = v->x;
1814         v->way = v->y;
1815         v->wah = v->h;
1816         v->waw = v->w;
1817         switch(bpos) {
1818         default:
1819                 v->wah -= bh;
1820                 v->way += bh;
1821                 XMoveWindow(dpy, v->barwin, v->x, v->y);
1822                 break;
1823         case BarBot:
1824                 v->wah -= bh;
1825                 XMoveWindow(dpy, v->barwin, v->x, v->y + v->wah);
1826                 break;
1827         case BarOff:
1828                 XMoveWindow(dpy, v->barwin, v->x, v->y - bh);
1829                 break;
1830         }
1831         XSync(dpy, False);
1832         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1833 }
1834
1835 void
1836 updatesizehints(Client *c) {
1837         long msize;
1838         XSizeHints size;
1839
1840         if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1841                 size.flags = PSize;
1842         c->flags = size.flags;
1843         if(c->flags & PBaseSize) {
1844                 c->basew = size.base_width;
1845                 c->baseh = size.base_height;
1846         }
1847         else if(c->flags & PMinSize) {
1848                 c->basew = size.min_width;
1849                 c->baseh = size.min_height;
1850         }
1851         else
1852                 c->basew = c->baseh = 0;
1853         if(c->flags & PResizeInc) {
1854                 c->incw = size.width_inc;
1855                 c->inch = size.height_inc;
1856         }
1857         else
1858                 c->incw = c->inch = 0;
1859         if(c->flags & PMaxSize) {
1860                 c->maxw = size.max_width;
1861                 c->maxh = size.max_height;
1862         }
1863         else
1864                 c->maxw = c->maxh = 0;
1865         if(c->flags & PMinSize) {
1866                 c->minw = size.min_width;
1867                 c->minh = size.min_height;
1868         }
1869         else if(c->flags & PBaseSize) {
1870                 c->minw = size.base_width;
1871                 c->minh = size.base_height;
1872         }
1873         else
1874                 c->minw = c->minh = 0;
1875         if(c->flags & PAspect) {
1876                 c->minax = size.min_aspect.x;
1877                 c->maxax = size.max_aspect.x;
1878                 c->minay = size.min_aspect.y;
1879                 c->maxay = size.max_aspect.y;
1880         }
1881         else
1882                 c->minax = c->maxax = c->minay = c->maxay = 0;
1883         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1884                         && c->maxw == c->minw && c->maxh == c->minh);
1885 }
1886
1887 void
1888 updatetitle(Client *c) {
1889         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1890                 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1891 }
1892
1893 void
1894 updatewmhints(Client *c) {
1895         XWMHints *wmh;
1896
1897         if((wmh = XGetWMHints(dpy, c->win))) {
1898                 c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
1899                 XFree(wmh);
1900         }
1901 }
1902
1903 void
1904 view(const char *arg) {
1905         unsigned int i;
1906         int tmp[LENGTH(tags)];
1907
1908         for(i = 0; i < LENGTH(tags); i++)
1909                 tmp[i] = (NULL == arg) ? selview->id : 0;
1910         tmp[idxoftag(arg)] = selview->id;
1911         if(memcmp(seltags, tmp, sizeof initags) != 0) {
1912                 memcpy(prevtags, seltags, sizeof initags);
1913                 memcpy(seltags, tmp, sizeof initags);
1914                 arrange();
1915         }
1916 }
1917
1918 View *
1919 viewat() {
1920         int i, x, y;
1921         Window win;
1922         unsigned int mask;
1923
1924         XQueryPointer(dpy, root, &win, &win, &x, &y, &i, &i, &mask);
1925         for(i = 0; i < nviews; i++) {
1926                 if((x >= views[i].x && x < views[i].x + views[i].w)
1927                 && (y >= views[i].y && y < views[i].y + views[i].h))
1928                         return &views[i];
1929         }
1930         return NULL;
1931 }
1932
1933 void
1934 viewprevtag(const char *arg) {
1935         static Bool tmp[LENGTH(tags)];
1936
1937         memcpy(tmp, seltags, sizeof initags);
1938         memcpy(seltags, prevtags, sizeof initags);
1939         memcpy(prevtags, tmp, sizeof initags);
1940         arrange();
1941 }
1942
1943 /* There's no way to check accesses to destroyed windows, thus those cases are
1944  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
1945  * default error handler, which may call exit.  */
1946 int
1947 xerror(Display *dpy, XErrorEvent *ee) {
1948         if(ee->error_code == BadWindow
1949         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1950         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1951         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1952         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1953         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1954         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1955         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1956                 return 0;
1957         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1958                 ee->request_code, ee->error_code);
1959         return xerrorxlib(dpy, ee); /* may call exit */
1960 }
1961
1962 int
1963 xerrordummy(Display *dpy, XErrorEvent *ee) {
1964         return 0;
1965 }
1966
1967 /* Startup Error handler to check if another window manager
1968  * is already running. */
1969 int
1970 xerrorstart(Display *dpy, XErrorEvent *ee) {
1971         otherwm = True;
1972         return -1;
1973 }
1974
1975 void
1976 zoom(const char *arg) {
1977         Client *c = sel;
1978
1979         if(!sel || !dozoom || sel->isfloating)
1980                 return;
1981         if(c == nexttiled(clients, getview(c)))
1982                 if(!(c = nexttiled(c->next, getview(c))))
1983                         return;
1984         detach(c);
1985         attach(c);
1986         focus(c);
1987         arrange();
1988 }
1989
1990 int
1991 main(int argc, char *argv[]) {
1992         if(argc == 2 && !strcmp("-v", argv[1]))
1993                 eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
1994         else if(argc != 1)
1995                 eprint("usage: dwm [-v]\n");
1996
1997         setlocale(LC_CTYPE, "");
1998         if(!(dpy = XOpenDisplay(0)))
1999                 eprint("dwm: cannot open display\n");
2000
2001         checkotherwm();
2002         setup();
2003         scan();
2004         run();
2005         cleanup();
2006
2007         XCloseDisplay(dpy);
2008         return 0;
2009 }