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  * The event handlers of dwm are organized in an array which is accessed
  10  * whenever a new event has been fetched. This allows event dispatching
  11  * in O(1) time.
  12  *
  13  * Each child of the root window is called a client, except windows which have
  14  * set the override_redirect flag.  Clients are organized in a linked client
  15  * list on each monitor, the focus history is remembered through a stack list
  16  * on each monitor. Each client contains a bit array to indicate the tags of a
  17  * client.
  18  *
  19  * Keys and tagging rules are organized as arrays and defined in config.h.
  20  *
  21  * To understand everything else, start reading main().
  22  */
  23 #include <errno.h>
  24 #include <locale.h>
  25 #include <signal.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/wait.h>
  33 #include <X11/cursorfont.h>
  34 #include <X11/keysym.h>
  35 #include <X11/Xatom.h>
  36 #include <X11/Xlib.h>
  37 #include <X11/Xproto.h>
  38 #include <X11/Xutil.h>
  39 #ifdef XINERAMA
  40 #include <X11/extensions/Xinerama.h>
  41 #endif /* XINERAMA */
  42 #include <X11/Xft/Xft.h>
  43
  44 #include "drw.h"
  45 #include "util.h"
  46
  47 /* macros */
  48 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  49 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  50 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  51                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  52 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  53 #define LENGTH(X)               (sizeof X / sizeof X[0])
  54 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  55 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  56 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  57 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  58 #define TEXTW(X)                (drw_text(drw, 0, 0, 0, 0, (X), 0) + drw->fonts[0]->h)
  59
  60 /* enums */
  61 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  62 enum { SchemeNorm, SchemeSel, SchemeLast }; /* color schemes */
  63 enum { NetSupported, NetWMName, NetWMState,
  64        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  65        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  66 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  67 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  68        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  69
  70 typedef union {
  71         int i;
  72         unsigned int ui;
  73         float f;
  74         const void *v;
  75 } Arg;
  76
  77 typedef struct {
  78         unsigned int click;
  79         unsigned int mask;
  80         unsigned int button;
  81         void (*func)(const Arg *arg);
  82         const Arg arg;
  83 } Button;
  84
  85 typedef struct Monitor Monitor;
  86 typedef struct Client Client;
  87 struct Client {
  88         char name[256];
  89         float mina, maxa;
  90         int x, y, w, h;
  91         int oldx, oldy, oldw, oldh;
  92         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  93         int bw, oldbw;
  94         unsigned int tags;
  95         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  96         Client *next;
  97         Client *snext;
  98         Monitor *mon;
  99         Window win;
 100 };
 101
 102 typedef struct {
 103         unsigned int mod;
 104         KeySym keysym;
 105         void (*func)(const Arg *);
 106         const Arg arg;
 107 } Key;
 108
 109 typedef struct {
 110         const char *symbol;
 111         void (*arrange)(Monitor *);
 112 } Layout;
 113
 114 struct Monitor {
 115         char ltsymbol[16];
 116         float mfact;
 117         int nmaster;
 118         int num;
 119         int by;               /* bar geometry */
 120         int mx, my, mw, mh;   /* screen size */
 121         int wx, wy, ww, wh;   /* window area  */
 122         unsigned int seltags;
 123         unsigned int sellt;
 124         unsigned int tagset[2];
 125         int showbar;
 126         int topbar;
 127         Client *clients;
 128         Client *sel;
 129         Client *stack;
 130         Monitor *next;
 131         Window barwin;
 132         const Layout *lt[2];
 133 };
 134
 135 typedef struct {
 136         const char *class;
 137         const char *instance;
 138         const char *title;
 139         unsigned int tags;
 140         int isfloating;
 141         int monitor;
 142 } Rule;
 143
 144 /* function declarations */
 145 static void applyrules(Client *c);
 146 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 147 static void arrange(Monitor *m);
 148 static void arrangemon(Monitor *m);
 149 static void attach(Client *c);
 150 static void attachstack(Client *c);
 151 static void buttonpress(XEvent *e);
 152 static void checkotherwm(void);
 153 static void cleanup(void);
 154 static void cleanupmon(Monitor *mon);
 155 static void clearurgent(Client *c);
 156 static void clientmessage(XEvent *e);
 157 static void configure(Client *c);
 158 static void configurenotify(XEvent *e);
 159 static void configurerequest(XEvent *e);
 160 static Monitor *createmon(void);
 161 static void destroynotify(XEvent *e);
 162 static void detach(Client *c);
 163 static void detachstack(Client *c);
 164 static Monitor *dirtomon(int dir);
 165 static void drawbar(Monitor *m);
 166 static void drawbars(void);
 167 static void enternotify(XEvent *e);
 168 static void expose(XEvent *e);
 169 static void focus(Client *c);
 170 static void focusin(XEvent *e);
 171 static void focusmon(const Arg *arg);
 172 static void focusstack(const Arg *arg);
 173 static int getrootptr(int *x, int *y);
 174 static long getstate(Window w);
 175 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 176 static void grabbuttons(Client *c, int focused);
 177 static void grabkeys(void);
 178 static void incnmaster(const Arg *arg);
 179 static void keypress(XEvent *e);
 180 static void killclient(const Arg *arg);
 181 static void manage(Window w, XWindowAttributes *wa);
 182 static void mappingnotify(XEvent *e);
 183 static void maprequest(XEvent *e);
 184 static void monocle(Monitor *m);
 185 static void motionnotify(XEvent *e);
 186 static void movemouse(const Arg *arg);
 187 static Client *nexttiled(Client *c);
 188 static void pop(Client *);
 189 static void propertynotify(XEvent *e);
 190 static void quit(const Arg *arg);
 191 static Monitor *recttomon(int x, int y, int w, int h);
 192 static void resize(Client *c, int x, int y, int w, int h, int interact);
 193 static void resizeclient(Client *c, int x, int y, int w, int h);
 194 static void resizemouse(const Arg *arg);
 195 static void restack(Monitor *m);
 196 static void run(void);
 197 static void scan(void);
 198 static int sendevent(Client *c, Atom proto);
 199 static void sendmon(Client *c, Monitor *m);
 200 static void setclientstate(Client *c, long state);
 201 static void setfocus(Client *c);
 202 static void setfullscreen(Client *c, int fullscreen);
 203 static void setlayout(const Arg *arg);
 204 static void setmfact(const Arg *arg);
 205 static void setup(void);
 206 static void showhide(Client *c);
 207 static void sigchld(int unused);
 208 static void spawn(const Arg *arg);
 209 static void tag(const Arg *arg);
 210 static void tagmon(const Arg *arg);
 211 static void tile(Monitor *);
 212 static void togglebar(const Arg *arg);
 213 static void togglefloating(const Arg *arg);
 214 static void toggletag(const Arg *arg);
 215 static void toggleview(const Arg *arg);
 216 static void unfocus(Client *c, int setfocus);
 217 static void unmanage(Client *c, int destroyed);
 218 static void unmapnotify(XEvent *e);
 219 static int updategeom(void);
 220 static void updatebarpos(Monitor *m);
 221 static void updatebars(void);
 222 static void updateclientlist(void);
 223 static void updatenumlockmask(void);
 224 static void updatesizehints(Client *c);
 225 static void updatestatus(void);
 226 static void updatewindowtype(Client *c);
 227 static void updatetitle(Client *c);
 228 static void updatewmhints(Client *c);
 229 static void view(const Arg *arg);
 230 static Client *wintoclient(Window w);
 231 static Monitor *wintomon(Window w);
 232 static int xerror(Display *dpy, XErrorEvent *ee);
 233 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 234 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 235 static void zoom(const Arg *arg);
 236
 237 /* variables */
 238 static const char broken[] = "broken";
 239 static char stext[256];
 240 static int screen;
 241 static int sw, sh;           /* X display screen geometry width, height */
 242 static int bh, blw = 0;      /* bar geometry */
 243 static int (*xerrorxlib)(Display *, XErrorEvent *);
 244 static unsigned int numlockmask = 0;
 245 static void (*handler[LASTEvent]) (XEvent *) = {
 246         [ButtonPress] = buttonpress,
 247         [ClientMessage] = clientmessage,
 248         [ConfigureRequest] = configurerequest,
 249         [ConfigureNotify] = configurenotify,
 250         [DestroyNotify] = destroynotify,
 251         [EnterNotify] = enternotify,
 252         [Expose] = expose,
 253         [FocusIn] = focusin,
 254         [KeyPress] = keypress,
 255         [MappingNotify] = mappingnotify,
 256         [MapRequest] = maprequest,
 257         [MotionNotify] = motionnotify,
 258         [PropertyNotify] = propertynotify,
 259         [UnmapNotify] = unmapnotify
 260 };
 261 static Atom wmatom[WMLast], netatom[NetLast];
 262 static int running = 1;
 263 static Cur *cursor[CurLast];
 264 static ClrScheme scheme[SchemeLast];
 265 static Display *dpy;
 266 static Drw *drw;
 267 static Monitor *mons, *selmon;
 268 static Window root;
 269
 270 /* configuration, allows nested code to access above variables */
 271 #include "config.h"
 272
 273 /* compile-time check if all tags fit into an unsigned int bit array. */
 274 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 275
 276 /* function implementations */
 277 void
 278 applyrules(Client *c)
 279 {
 280         const char *class, *instance;
 281         unsigned int i;
 282         const Rule *r;
 283         Monitor *m;
 284         XClassHint ch = { NULL, NULL };
 285
 286         /* rule matching */
 287         c->isfloating = 0;
 288         c->tags = 0;
 289         XGetClassHint(dpy, c->win, &ch);
 290         class    = ch.res_class ? ch.res_class : broken;
 291         instance = ch.res_name  ? ch.res_name  : broken;
 292
 293         for (i = 0; i < LENGTH(rules); i++) {
 294                 r = &rules[i];
 295                 if ((!r->title || strstr(c->name, r->title))
 296                 && (!r->class || strstr(class, r->class))
 297                 && (!r->instance || strstr(instance, r->instance)))
 298                 {
 299                         c->isfloating = r->isfloating;
 300                         c->tags |= r->tags;
 301                         for (m = mons; m && m->num != r->monitor; m = m->next);
 302                         if (m)
 303                                 c->mon = m;
 304                 }
 305         }
 306         if (ch.res_class)
 307                 XFree(ch.res_class);
 308         if (ch.res_name)
 309                 XFree(ch.res_name);
 310         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 311 }
 312
 313 int
 314 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 315 {
 316         int baseismin;
 317         Monitor *m = c->mon;
 318
 319         /* set minimum possible */
 320         *w = MAX(1, *w);
 321         *h = MAX(1, *h);
 322         if (interact) {
 323                 if (*x > sw)
 324                         *x = sw - WIDTH(c);
 325                 if (*y > sh)
 326                         *y = sh - HEIGHT(c);
 327                 if (*x + *w + 2 * c->bw < 0)
 328                         *x = 0;
 329                 if (*y + *h + 2 * c->bw < 0)
 330                         *y = 0;
 331         } else {
 332                 if (*x >= m->wx + m->ww)
 333                         *x = m->wx + m->ww - WIDTH(c);
 334                 if (*y >= m->wy + m->wh)
 335                         *y = m->wy + m->wh - HEIGHT(c);
 336                 if (*x + *w + 2 * c->bw <= m->wx)
 337                         *x = m->wx;
 338                 if (*y + *h + 2 * c->bw <= m->wy)
 339                         *y = m->wy;
 340         }
 341         if (*h < bh)
 342                 *h = bh;
 343         if (*w < bh)
 344                 *w = bh;
 345         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 346                 /* see last two sentences in ICCCM 4.1.2.3 */
 347                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 348                 if (!baseismin) { /* temporarily remove base dimensions */
 349                         *w -= c->basew;
 350                         *h -= c->baseh;
 351                 }
 352                 /* adjust for aspect limits */
 353                 if (c->mina > 0 && c->maxa > 0) {
 354                         if (c->maxa < (float)*w / *h)
 355                                 *w = *h * c->maxa + 0.5;
 356                         else if (c->mina < (float)*h / *w)
 357                                 *h = *w * c->mina + 0.5;
 358                 }
 359                 if (baseismin) { /* increment calculation requires this */
 360                         *w -= c->basew;
 361                         *h -= c->baseh;
 362                 }
 363                 /* adjust for increment value */
 364                 if (c->incw)
 365                         *w -= *w % c->incw;
 366                 if (c->inch)
 367                         *h -= *h % c->inch;
 368                 /* restore base dimensions */
 369                 *w = MAX(*w + c->basew, c->minw);
 370                 *h = MAX(*h + c->baseh, c->minh);
 371                 if (c->maxw)
 372                         *w = MIN(*w, c->maxw);
 373                 if (c->maxh)
 374                         *h = MIN(*h, c->maxh);
 375         }
 376         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 377 }
 378
 379 void
 380 arrange(Monitor *m)
 381 {
 382         if (m)
 383                 showhide(m->stack);
 384         else for (m = mons; m; m = m->next)
 385                 showhide(m->stack);
 386         if (m) {
 387                 arrangemon(m);
 388                 restack(m);
 389         } else for (m = mons; m; m = m->next)
 390                 arrangemon(m);
 391 }
 392
 393 void
 394 arrangemon(Monitor *m)
 395 {
 396         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 397         if (m->lt[m->sellt]->arrange)
 398                 m->lt[m->sellt]->arrange(m);
 399 }
 400
 401 void
 402 attach(Client *c)
 403 {
 404         c->next = c->mon->clients;
 405         c->mon->clients = c;
 406 }
 407
 408 void
 409 attachstack(Client *c)
 410 {
 411         c->snext = c->mon->stack;
 412         c->mon->stack = c;
 413 }
 414
 415 void
 416 buttonpress(XEvent *e)
 417 {
 418         unsigned int i, x, click;
 419         Arg arg = {0};
 420         Client *c;
 421         Monitor *m;
 422         XButtonPressedEvent *ev = &e->xbutton;
 423
 424         click = ClkRootWin;
 425         /* focus monitor if necessary */
 426         if ((m = wintomon(ev->window)) && m != selmon) {
 427                 unfocus(selmon->sel, 1);
 428                 selmon = m;
 429                 focus(NULL);
 430         }
 431         if (ev->window == selmon->barwin) {
 432                 i = x = 0;
 433                 do
 434                         x += TEXTW(tags[i]);
 435                 while (ev->x >= x && ++i < LENGTH(tags));
 436                 if (i < LENGTH(tags)) {
 437                         click = ClkTagBar;
 438                         arg.ui = 1 << i;
 439                 } else if (ev->x < x + blw)
 440                         click = ClkLtSymbol;
 441                 else if (ev->x > selmon->ww - TEXTW(stext))
 442                         click = ClkStatusText;
 443                 else
 444                         click = ClkWinTitle;
 445         } else if ((c = wintoclient(ev->window))) {
 446                 focus(c);
 447                 click = ClkClientWin;
 448         }
 449         for (i = 0; i < LENGTH(buttons); i++)
 450                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 451                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 452                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 453 }
 454
 455 void
 456 checkotherwm(void)
 457 {
 458         xerrorxlib = XSetErrorHandler(xerrorstart);
 459         /* this causes an error if some other window manager is running */
 460         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 461         XSync(dpy, False);
 462         XSetErrorHandler(xerror);
 463         XSync(dpy, False);
 464 }
 465
 466 void
 467 cleanup(void)
 468 {
 469         Arg a = {.ui = ~0};
 470         Layout foo = { "", NULL };
 471         Monitor *m;
 472         size_t i;
 473
 474         view(&a);
 475         selmon->lt[selmon->sellt] = &foo;
 476         for (m = mons; m; m = m->next)
 477                 while (m->stack)
 478                         unmanage(m->stack, 0);
 479         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 480         while (mons)
 481                 cleanupmon(mons);
 482         for (i = 0; i < CurLast; i++)
 483                 drw_cur_free(drw, cursor[i]);
 484         for (i = 0; i < SchemeLast; i++) {
 485                 drw_clr_free(scheme[i].border);
 486                 drw_clr_free(scheme[i].bg);
 487                 drw_clr_free(scheme[i].fg);
 488         }
 489         drw_free(drw);
 490         XSync(dpy, False);
 491         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 492         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 493 }
 494
 495 void
 496 cleanupmon(Monitor *mon)
 497 {
 498         Monitor *m;
 499
 500         if (mon == mons)
 501                 mons = mons->next;
 502         else {
 503                 for (m = mons; m && m->next != mon; m = m->next);
 504                 m->next = mon->next;
 505         }
 506         XUnmapWindow(dpy, mon->barwin);
 507         XDestroyWindow(dpy, mon->barwin);
 508         free(mon);
 509 }
 510
 511 void
 512 clearurgent(Client *c)
 513 {
 514         XWMHints *wmh;
 515
 516         c->isurgent = 0;
 517         if (!(wmh = XGetWMHints(dpy, c->win)))
 518                 return;
 519         wmh->flags &= ~XUrgencyHint;
 520         XSetWMHints(dpy, c->win, wmh);
 521         XFree(wmh);
 522 }
 523
 524 void
 525 clientmessage(XEvent *e)
 526 {
 527         XClientMessageEvent *cme = &e->xclient;
 528         Client *c = wintoclient(cme->window);
 529
 530         if (!c)
 531                 return;
 532         if (cme->message_type == netatom[NetWMState]) {
 533                 if (cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 534                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 535                                       || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 536         } else if (cme->message_type == netatom[NetActiveWindow]) {
 537                 if (!ISVISIBLE(c)) {
 538                         c->mon->seltags ^= 1;
 539                         c->mon->tagset[c->mon->seltags] = c->tags;
 540                 }
 541                 pop(c);
 542         }
 543 }
 544
 545 void
 546 configure(Client *c)
 547 {
 548         XConfigureEvent ce;
 549
 550         ce.type = ConfigureNotify;
 551         ce.display = dpy;
 552         ce.event = c->win;
 553         ce.window = c->win;
 554         ce.x = c->x;
 555         ce.y = c->y;
 556         ce.width = c->w;
 557         ce.height = c->h;
 558         ce.border_width = c->bw;
 559         ce.above = None;
 560         ce.override_redirect = False;
 561         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 562 }
 563
 564 void
 565 configurenotify(XEvent *e)
 566 {
 567         Monitor *m;
 568         XConfigureEvent *ev = &e->xconfigure;
 569         int dirty;
 570
 571         /* TODO: updategeom handling sucks, needs to be simplified */
 572         if (ev->window == root) {
 573                 dirty = (sw != ev->width || sh != ev->height);
 574                 sw = ev->width;
 575                 sh = ev->height;
 576                 if (updategeom() || dirty) {
 577                         drw_resize(drw, sw, bh);
 578                         updatebars();
 579                         for (m = mons; m; m = m->next)
 580                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 581                         focus(NULL);
 582                         arrange(NULL);
 583                 }
 584         }
 585 }
 586
 587 void
 588 configurerequest(XEvent *e)
 589 {
 590         Client *c;
 591         Monitor *m;
 592         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 593         XWindowChanges wc;
 594
 595         if ((c = wintoclient(ev->window))) {
 596                 if (ev->value_mask & CWBorderWidth)
 597                         c->bw = ev->border_width;
 598                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 599                         m = c->mon;
 600                         if (ev->value_mask & CWX) {
 601                                 c->oldx = c->x;
 602                                 c->x = m->mx + ev->x;
 603                         }
 604                         if (ev->value_mask & CWY) {
 605                                 c->oldy = c->y;
 606                                 c->y = m->my + ev->y;
 607                         }
 608                         if (ev->value_mask & CWWidth) {
 609                                 c->oldw = c->w;
 610                                 c->w = ev->width;
 611                         }
 612                         if (ev->value_mask & CWHeight) {
 613                                 c->oldh = c->h;
 614                                 c->h = ev->height;
 615                         }
 616                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 617                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 618                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 619                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 620                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 621                                 configure(c);
 622                         if (ISVISIBLE(c))
 623                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 624                 } else
 625                         configure(c);
 626         } else {
 627                 wc.x = ev->x;
 628                 wc.y = ev->y;
 629                 wc.width = ev->width;
 630                 wc.height = ev->height;
 631                 wc.border_width = ev->border_width;
 632                 wc.sibling = ev->above;
 633                 wc.stack_mode = ev->detail;
 634                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 635         }
 636         XSync(dpy, False);
 637 }
 638
 639 Monitor *
 640 createmon(void)
 641 {
 642         Monitor *m;
 643
 644         m = ecalloc(1, sizeof(Monitor));
 645         m->tagset[0] = m->tagset[1] = 1;
 646         m->mfact = mfact;
 647         m->nmaster = nmaster;
 648         m->showbar = showbar;
 649         m->topbar = topbar;
 650         m->lt[0] = &layouts[0];
 651         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 652         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 653         return m;
 654 }
 655
 656 void
 657 destroynotify(XEvent *e)
 658 {
 659         Client *c;
 660         XDestroyWindowEvent *ev = &e->xdestroywindow;
 661
 662         if ((c = wintoclient(ev->window)))
 663                 unmanage(c, 1);
 664 }
 665
 666 void
 667 detach(Client *c)
 668 {
 669         Client **tc;
 670
 671         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 672         *tc = c->next;
 673 }
 674
 675 void
 676 detachstack(Client *c)
 677 {
 678         Client **tc, *t;
 679
 680         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 681         *tc = c->snext;
 682
 683         if (c == c->mon->sel) {
 684                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 685                 c->mon->sel = t;
 686         }
 687 }
 688
 689 Monitor *
 690 dirtomon(int dir)
 691 {
 692         Monitor *m = NULL;
 693
 694         if (dir > 0) {
 695                 if (!(m = selmon->next))
 696                         m = mons;
 697         } else if (selmon == mons)
 698                 for (m = mons; m->next; m = m->next);
 699         else
 700                 for (m = mons; m->next != selmon; m = m->next);
 701         return m;
 702 }
 703
 704 void
 705 drawbar(Monitor *m)
 706 {
 707         int x, xx, w, dx;
 708         unsigned int i, occ = 0, urg = 0;
 709         Client *c;
 710
 711         dx = (drw->fonts[0]->ascent + drw->fonts[0]->descent + 2) / 4;
 712
 713         for (c = m->clients; c; c = c->next) {
 714                 occ |= c->tags;
 715                 if (c->isurgent)
 716                         urg |= c->tags;
 717         }
 718         x = 0;
 719         for (i = 0; i < LENGTH(tags); i++) {
 720                 w = TEXTW(tags[i]);
 721                 drw_setscheme(drw, m->tagset[m->seltags] & 1 << i ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 722                 drw_text(drw, x, 0, w, bh, tags[i], urg & 1 << i);
 723                 drw_rect(drw, x + 1, 1, dx, dx, m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 724                            occ & 1 << i, urg & 1 << i);
 725                 x += w;
 726         }
 727         w = blw = TEXTW(m->ltsymbol);
 728         drw_setscheme(drw, &scheme[SchemeNorm]);
 729         drw_text(drw, x, 0, w, bh, m->ltsymbol, 0);
 730         x += w;
 731         xx = x;
 732         if (m == selmon) { /* status is only drawn on selected monitor */
 733                 w = TEXTW(stext);
 734                 x = m->ww - w;
 735                 if (x < xx) {
 736                         x = xx;
 737                         w = m->ww - xx;
 738                 }
 739                 drw_text(drw, x, 0, w, bh, stext, 0);
 740         } else
 741                 x = m->ww;
 742         if ((w = x - xx) > bh) {
 743                 x = xx;
 744                 if (m->sel) {
 745                         drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 746                         drw_text(drw, x, 0, w, bh, m->sel->name, 0);
 747                         drw_rect(drw, x + 1, 1, dx, dx, m->sel->isfixed, m->sel->isfloating, 0);
 748                 } else {
 749                         drw_setscheme(drw, &scheme[SchemeNorm]);
 750                         drw_rect(drw, x, 0, w, bh, 1, 0, 1);
 751                 }
 752         }
 753         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 754 }
 755
 756 void
 757 drawbars(void)
 758 {
 759         Monitor *m;
 760
 761         for (m = mons; m; m = m->next)
 762                 drawbar(m);
 763 }
 764
 765 void
 766 enternotify(XEvent *e)
 767 {
 768         Client *c;
 769         Monitor *m;
 770         XCrossingEvent *ev = &e->xcrossing;
 771
 772         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 773                 return;
 774         c = wintoclient(ev->window);
 775         m = c ? c->mon : wintomon(ev->window);
 776         if (m != selmon) {
 777                 unfocus(selmon->sel, 1);
 778                 selmon = m;
 779         } else if (!c || c == selmon->sel)
 780                 return;
 781         focus(c);
 782 }
 783
 784 void
 785 expose(XEvent *e)
 786 {
 787         Monitor *m;
 788         XExposeEvent *ev = &e->xexpose;
 789
 790         if (ev->count == 0 && (m = wintomon(ev->window)))
 791                 drawbar(m);
 792 }
 793
 794 void
 795 focus(Client *c)
 796 {
 797         if (!c || !ISVISIBLE(c))
 798                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 799         /* was if (selmon->sel) */
 800         if (selmon->sel && selmon->sel != c)
 801                 unfocus(selmon->sel, 0);
 802         if (c) {
 803                 if (c->mon != selmon)
 804                         selmon = c->mon;
 805                 if (c->isurgent)
 806                         clearurgent(c);
 807                 detachstack(c);
 808                 attachstack(c);
 809                 grabbuttons(c, 1);
 810                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->pix);
 811                 setfocus(c);
 812         } else {
 813                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 814                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 815         }
 816         selmon->sel = c;
 817         drawbars();
 818 }
 819
 820 /* there are some broken focus acquiring clients */
 821 void
 822 focusin(XEvent *e)
 823 {
 824         XFocusChangeEvent *ev = &e->xfocus;
 825
 826         if (selmon->sel && ev->window != selmon->sel->win)
 827                 setfocus(selmon->sel);
 828 }
 829
 830 void
 831 focusmon(const Arg *arg)
 832 {
 833         Monitor *m;
 834
 835         if (!mons->next)
 836                 return;
 837         if ((m = dirtomon(arg->i)) == selmon)
 838                 return;
 839         unfocus(selmon->sel, 0); /* s/1/0/ fixes input focus issues
 840                                         in gedit and anjuta */
 841         selmon = m;
 842         focus(NULL);
 843 }
 844
 845 void
 846 focusstack(const Arg *arg)
 847 {
 848         Client *c = NULL, *i;
 849
 850         if (!selmon->sel)
 851                 return;
 852         if (arg->i > 0) {
 853                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 854                 if (!c)
 855                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 856         } else {
 857                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 858                         if (ISVISIBLE(i))
 859                                 c = i;
 860                 if (!c)
 861                         for (; i; i = i->next)
 862                                 if (ISVISIBLE(i))
 863                                         c = i;
 864         }
 865         if (c) {
 866                 focus(c);
 867                 restack(selmon);
 868         }
 869 }
 870
 871 Atom
 872 getatomprop(Client *c, Atom prop)
 873 {
 874         int di;
 875         unsigned long dl;
 876         unsigned char *p = NULL;
 877         Atom da, atom = None;
 878
 879         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 880                               &da, &di, &dl, &dl, &p) == Success && p) {
 881                 atom = *(Atom *)p;
 882                 XFree(p);
 883         }
 884         return atom;
 885 }
 886
 887 int
 888 getrootptr(int *x, int *y)
 889 {
 890         int di;
 891         unsigned int dui;
 892         Window dummy;
 893
 894         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 895 }
 896
 897 long
 898 getstate(Window w)
 899 {
 900         int format;
 901         long result = -1;
 902         unsigned char *p = NULL;
 903         unsigned long n, extra;
 904         Atom real;
 905
 906         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 907                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 908                 return -1;
 909         if (n != 0)
 910                 result = *p;
 911         XFree(p);
 912         return result;
 913 }
 914
 915 int
 916 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 917 {
 918         char **list = NULL;
 919         int n;
 920         XTextProperty name;
 921
 922         if (!text || size == 0)
 923                 return 0;
 924         text[0] = '\0';
 925         XGetTextProperty(dpy, w, &name, atom);
 926         if (!name.nitems)
 927                 return 0;
 928         if (name.encoding == XA_STRING)
 929                 strncpy(text, (char *)name.value, size - 1);
 930         else {
 931                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 932                         strncpy(text, *list, size - 1);
 933                         XFreeStringList(list);
 934                 }
 935         }
 936         text[size - 1] = '\0';
 937         XFree(name.value);
 938         return 1;
 939 }
 940
 941 void
 942 grabbuttons(Client *c, int focused)
 943 {
 944         updatenumlockmask();
 945         {
 946                 unsigned int i, j;
 947                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 948                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 949                 if (focused) {
 950                         for (i = 0; i < LENGTH(buttons); i++)
 951                                 if (buttons[i].click == ClkClientWin)
 952                                         for (j = 0; j < LENGTH(modifiers); j++)
 953                                                 XGrabButton(dpy, buttons[i].button,
 954                                                             buttons[i].mask | modifiers[j],
 955                                                             c->win, False, BUTTONMASK,
 956                                                             GrabModeAsync, GrabModeSync, None, None);
 957                 } else
 958                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 959                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 960         }
 961 }
 962
 963 void
 964 grabkeys(void)
 965 {
 966         updatenumlockmask();
 967         {
 968                 unsigned int i, j;
 969                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 970                 KeyCode code;
 971
 972                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 973                 for (i = 0; i < LENGTH(keys); i++)
 974                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 975                                 for (j = 0; j < LENGTH(modifiers); j++)
 976                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 977                                                  True, GrabModeAsync, GrabModeAsync);
 978         }
 979 }
 980
 981 void
 982 incnmaster(const Arg *arg)
 983 {
 984         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 985         arrange(selmon);
 986 }
 987
 988 #ifdef XINERAMA
 989 static int
 990 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 991 {
 992         while (n--)
 993                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 994                 && unique[n].width == info->width && unique[n].height == info->height)
 995                         return 0;
 996         return 1;
 997 }
 998 #endif /* XINERAMA */
 999
1000 void
1001 keypress(XEvent *e)
1002 {
1003         unsigned int i;
1004         KeySym keysym;
1005         XKeyEvent *ev;
1006
1007         ev = &e->xkey;
1008         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1009         for (i = 0; i < LENGTH(keys); i++)
1010                 if (keysym == keys[i].keysym
1011                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1012                 && keys[i].func)
1013                         keys[i].func(&(keys[i].arg));
1014 }
1015
1016 void
1017 killclient(const Arg *arg)
1018 {
1019         if (!selmon->sel)
1020                 return;
1021         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1022                 XGrabServer(dpy);
1023                 XSetErrorHandler(xerrordummy);
1024                 XSetCloseDownMode(dpy, DestroyAll);
1025                 XKillClient(dpy, selmon->sel->win);
1026                 XSync(dpy, False);
1027                 XSetErrorHandler(xerror);
1028                 XUngrabServer(dpy);
1029         }
1030 }
1031
1032 void
1033 manage(Window w, XWindowAttributes *wa)
1034 {
1035         Client *c, *t = NULL;
1036         Window trans = None;
1037         XWindowChanges wc;
1038
1039         c = ecalloc(1, sizeof(Client));
1040         c->win = w;
1041         updatetitle(c);
1042         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1043                 c->mon = t->mon;
1044                 c->tags = t->tags;
1045         } else {
1046                 c->mon = selmon;
1047                 applyrules(c);
1048         }
1049         /* geometry */
1050         c->x = c->oldx = wa->x;
1051         c->y = c->oldy = wa->y;
1052         c->w = c->oldw = wa->width;
1053         c->h = c->oldh = wa->height;
1054         c->oldbw = wa->border_width;
1055
1056         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1057                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1058         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1059                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1060         c->x = MAX(c->x, c->mon->mx);
1061         /* only fix client y-offset, if the client center might cover the bar */
1062         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1063                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1064         c->bw = borderpx;
1065
1066         wc.border_width = c->bw;
1067         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1068         XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->pix);
1069         configure(c); /* propagates border_width, if size doesn't change */
1070         updatewindowtype(c);
1071         updatesizehints(c);
1072         updatewmhints(c);
1073         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1074         grabbuttons(c, 0);
1075         if (!c->isfloating)
1076                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1077         if (c->isfloating)
1078                 XRaiseWindow(dpy, c->win);
1079         attach(c);
1080         attachstack(c);
1081         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1082                         (unsigned char *) &(c->win), 1);
1083         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1084         setclientstate(c, NormalState);
1085         if (c->mon == selmon)
1086                 unfocus(selmon->sel, 0);
1087         c->mon->sel = c;
1088         arrange(c->mon);
1089         XMapWindow(dpy, c->win);
1090         focus(NULL);
1091 }
1092
1093 void
1094 mappingnotify(XEvent *e)
1095 {
1096         XMappingEvent *ev = &e->xmapping;
1097
1098         XRefreshKeyboardMapping(ev);
1099         if (ev->request == MappingKeyboard)
1100                 grabkeys();
1101 }
1102
1103 void
1104 maprequest(XEvent *e)
1105 {
1106         static XWindowAttributes wa;
1107         XMapRequestEvent *ev = &e->xmaprequest;
1108
1109         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1110                 return;
1111         if (wa.override_redirect)
1112                 return;
1113         if (!wintoclient(ev->window))
1114                 manage(ev->window, &wa);
1115 }
1116
1117 void
1118 monocle(Monitor *m)
1119 {
1120         unsigned int n = 0;
1121         Client *c;
1122
1123         for (c = m->clients; c; c = c->next)
1124                 if (ISVISIBLE(c))
1125                         n++;
1126         if (n > 0) /* override layout symbol */
1127                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1128         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1129                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1130 }
1131
1132 void
1133 motionnotify(XEvent *e)
1134 {
1135         static Monitor *mon = NULL;
1136         Monitor *m;
1137         XMotionEvent *ev = &e->xmotion;
1138
1139         if (ev->window != root)
1140                 return;
1141         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1142                 unfocus(selmon->sel, 1);
1143                 selmon = m;
1144                 focus(NULL);
1145         }
1146         mon = m;
1147 }
1148
1149 void
1150 movemouse(const Arg *arg)
1151 {
1152         int x, y, ocx, ocy, nx, ny;
1153         Client *c;
1154         Monitor *m;
1155         XEvent ev;
1156         Time lasttime = 0;
1157
1158         if (!(c = selmon->sel))
1159                 return;
1160         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1161                 return;
1162         restack(selmon);
1163         ocx = c->x;
1164         ocy = c->y;
1165         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1166         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1167                 return;
1168         if (!getrootptr(&x, &y))
1169                 return;
1170         do {
1171                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1172                 switch(ev.type) {
1173                 case ConfigureRequest:
1174                 case Expose:
1175                 case MapRequest:
1176                         handler[ev.type](&ev);
1177                         break;
1178                 case MotionNotify:
1179                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1180                                 continue;
1181                         lasttime = ev.xmotion.time;
1182
1183                         nx = ocx + (ev.xmotion.x - x);
1184                         ny = ocy + (ev.xmotion.y - y);
1185                         if (nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1186                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1187                                 if (abs(selmon->wx - nx) < snap)
1188                                         nx = selmon->wx;
1189                                 else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1190                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1191                                 if (abs(selmon->wy - ny) < snap)
1192                                         ny = selmon->wy;
1193                                 else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1194                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1195                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1196                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1197                                         togglefloating(NULL);
1198                         }
1199                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1200                                 resize(c, nx, ny, c->w, c->h, 1);
1201                         break;
1202                 }
1203         } while (ev.type != ButtonRelease);
1204         XUngrabPointer(dpy, CurrentTime);
1205         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1206                 sendmon(c, m);
1207                 selmon = m;
1208                 focus(NULL);
1209         }
1210 }
1211
1212 Client *
1213 nexttiled(Client *c)
1214 {
1215         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1216         return c;
1217 }
1218
1219 void
1220 pop(Client *c)
1221 {
1222         detach(c);
1223         attach(c);
1224         focus(c);
1225         arrange(c->mon);
1226 }
1227
1228 void
1229 propertynotify(XEvent *e)
1230 {
1231         Client *c;
1232         Window trans;
1233         XPropertyEvent *ev = &e->xproperty;
1234
1235         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1236                 updatestatus();
1237         else if (ev->state == PropertyDelete)
1238                 return; /* ignore */
1239         else if ((c = wintoclient(ev->window))) {
1240                 switch(ev->atom) {
1241                 default: break;
1242                 case XA_WM_TRANSIENT_FOR:
1243                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1244                            (c->isfloating = (wintoclient(trans)) != NULL))
1245                                 arrange(c->mon);
1246                         break;
1247                 case XA_WM_NORMAL_HINTS:
1248                         updatesizehints(c);
1249                         break;
1250                 case XA_WM_HINTS:
1251                         updatewmhints(c);
1252                         drawbars();
1253                         break;
1254                 }
1255                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1256                         updatetitle(c);
1257                         if (c == c->mon->sel)
1258                                 drawbar(c->mon);
1259                 }
1260                 if (ev->atom == netatom[NetWMWindowType])
1261                         updatewindowtype(c);
1262         }
1263 }
1264
1265 void
1266 quit(const Arg *arg)
1267 {
1268         running = 0;
1269 }
1270
1271 Monitor *
1272 recttomon(int x, int y, int w, int h)
1273 {
1274         Monitor *m, *r = selmon;
1275         int a, area = 0;
1276
1277         for (m = mons; m; m = m->next)
1278                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1279                         area = a;
1280                         r = m;
1281                 }
1282         return r;
1283 }
1284
1285 void
1286 resize(Client *c, int x, int y, int w, int h, int interact)
1287 {
1288         if (applysizehints(c, &x, &y, &w, &h, interact))
1289                 resizeclient(c, x, y, w, h);
1290 }
1291
1292 void
1293 resizeclient(Client *c, int x, int y, int w, int h)
1294 {
1295         XWindowChanges wc;
1296
1297         c->oldx = c->x; c->x = wc.x = x;
1298         c->oldy = c->y; c->y = wc.y = y;
1299         c->oldw = c->w; c->w = wc.width = w;
1300         c->oldh = c->h; c->h = wc.height = h;
1301         wc.border_width = c->bw;
1302         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1303         configure(c);
1304         XSync(dpy, False);
1305 }
1306
1307 void
1308 resizemouse(const Arg *arg)
1309 {
1310         int ocx, ocy, nw, nh;
1311         Client *c;
1312         Monitor *m;
1313         XEvent ev;
1314         Time lasttime = 0;
1315
1316         if (!(c = selmon->sel))
1317                 return;
1318         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1319                 return;
1320         restack(selmon);
1321         ocx = c->x;
1322         ocy = c->y;
1323         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1324                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1325                 return;
1326         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1327         do {
1328                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1329                 switch(ev.type) {
1330                 case ConfigureRequest:
1331                 case Expose:
1332                 case MapRequest:
1333                         handler[ev.type](&ev);
1334                         break;
1335                 case MotionNotify:
1336                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1337                                 continue;
1338                         lasttime = ev.xmotion.time;
1339
1340                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1341                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1342                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1343                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1344                         {
1345                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1346                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1347                                         togglefloating(NULL);
1348                         }
1349                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1350                                 resize(c, c->x, c->y, nw, nh, 1);
1351                         break;
1352                 }
1353         } while (ev.type != ButtonRelease);
1354         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1355         XUngrabPointer(dpy, CurrentTime);
1356         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1357         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1358                 sendmon(c, m);
1359                 selmon = m;
1360                 focus(NULL);
1361         }
1362 }
1363
1364 void
1365 restack(Monitor *m)
1366 {
1367         Client *c;
1368         XEvent ev;
1369         XWindowChanges wc;
1370
1371         drawbar(m);
1372         if (!m->sel)
1373                 return;
1374         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1375                 XRaiseWindow(dpy, m->sel->win);
1376         if (m->lt[m->sellt]->arrange) {
1377                 wc.stack_mode = Below;
1378                 wc.sibling = m->barwin;
1379                 for (c = m->stack; c; c = c->snext)
1380                         if (!c->isfloating && ISVISIBLE(c)) {
1381                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1382                                 wc.sibling = c->win;
1383                         }
1384         }
1385         XSync(dpy, False);
1386         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1387 }
1388
1389 void
1390 run(void)
1391 {
1392         XEvent ev;
1393         /* main event loop */
1394         XSync(dpy, False);
1395         while (running && !XNextEvent(dpy, &ev))
1396                 if (handler[ev.type])
1397                         handler[ev.type](&ev); /* call handler */
1398 }
1399
1400 void
1401 scan(void)
1402 {
1403         unsigned int i, num;
1404         Window d1, d2, *wins = NULL;
1405         XWindowAttributes wa;
1406
1407         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1408                 for (i = 0; i < num; i++) {
1409                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1410                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1411                                 continue;
1412                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1413                                 manage(wins[i], &wa);
1414                 }
1415                 for (i = 0; i < num; i++) { /* now the transients */
1416                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1417                                 continue;
1418                         if (XGetTransientForHint(dpy, wins[i], &d1)
1419                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1420                                 manage(wins[i], &wa);
1421                 }
1422                 if (wins)
1423                         XFree(wins);
1424         }
1425 }
1426
1427 void
1428 sendmon(Client *c, Monitor *m)
1429 {
1430         if (c->mon == m)
1431                 return;
1432         unfocus(c, 1);
1433         detach(c);
1434         detachstack(c);
1435         c->mon = m;
1436         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1437         attach(c);
1438         attachstack(c);
1439         focus(NULL);
1440         arrange(NULL);
1441 }
1442
1443 void
1444 setclientstate(Client *c, long state)
1445 {
1446         long data[] = { state, None };
1447
1448         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1449                         PropModeReplace, (unsigned char *)data, 2);
1450 }
1451
1452 int
1453 sendevent(Client *c, Atom proto)
1454 {
1455         int n;
1456         Atom *protocols;
1457         int exists = 0;
1458         XEvent ev;
1459
1460         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1461                 while (!exists && n--)
1462                         exists = protocols[n] == proto;
1463                 XFree(protocols);
1464         }
1465         if (exists) {
1466                 ev.type = ClientMessage;
1467                 ev.xclient.window = c->win;
1468                 ev.xclient.message_type = wmatom[WMProtocols];
1469                 ev.xclient.format = 32;
1470                 ev.xclient.data.l[0] = proto;
1471                 ev.xclient.data.l[1] = CurrentTime;
1472                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1473         }
1474         return exists;
1475 }
1476
1477 void
1478 setfocus(Client *c)
1479 {
1480         if (!c->neverfocus) {
1481                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1482                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1483                                 XA_WINDOW, 32, PropModeReplace,
1484                                 (unsigned char *) &(c->win), 1);
1485         }
1486         sendevent(c, wmatom[WMTakeFocus]);
1487 }
1488
1489 void
1490 setfullscreen(Client *c, int fullscreen)
1491 {
1492         if (fullscreen && !c->isfullscreen) {
1493                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1494                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1495                 c->isfullscreen = 1;
1496                 c->oldstate = c->isfloating;
1497                 c->oldbw = c->bw;
1498                 c->bw = 0;
1499                 c->isfloating = 1;
1500                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1501                 XRaiseWindow(dpy, c->win);
1502         } else if (!fullscreen && c->isfullscreen){
1503                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1504                                 PropModeReplace, (unsigned char*)0, 0);
1505                 c->isfullscreen = 0;
1506                 c->isfloating = c->oldstate;
1507                 c->bw = c->oldbw;
1508                 c->x = c->oldx;
1509                 c->y = c->oldy;
1510                 c->w = c->oldw;
1511                 c->h = c->oldh;
1512                 resizeclient(c, c->x, c->y, c->w, c->h);
1513                 arrange(c->mon);
1514         }
1515 }
1516
1517 void
1518 setlayout(const Arg *arg)
1519 {
1520         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1521                 selmon->sellt ^= 1;
1522         if (arg && arg->v)
1523                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1524         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1525         if (selmon->sel)
1526                 arrange(selmon);
1527         else
1528                 drawbar(selmon);
1529 }
1530
1531 /* arg > 1.0 will set mfact absolutly */
1532 void
1533 setmfact(const Arg *arg)
1534 {
1535         float f;
1536
1537         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1538                 return;
1539         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1540         if (f < 0.1 || f > 0.9)
1541                 return;
1542         selmon->mfact = f;
1543         arrange(selmon);
1544 }
1545
1546 void
1547 setup(void)
1548 {
1549         XSetWindowAttributes wa;
1550
1551         /* clean up any zombies immediately */
1552         sigchld(0);
1553
1554         /* init screen */
1555         screen = DefaultScreen(dpy);
1556         sw = DisplayWidth(dpy, screen);
1557         sh = DisplayHeight(dpy, screen);
1558         root = RootWindow(dpy, screen);
1559         drw = drw_create(dpy, screen, root, sw, sh);
1560         drw_load_fonts(drw, fonts, LENGTH(fonts));
1561         if (!drw->fontcount)
1562                 die("no fonts could be loaded.\n");
1563         bh = drw->fonts[0]->h + 2;
1564         updategeom();
1565         /* init atoms */
1566         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1567         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1568         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1569         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1570         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1571         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1572         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1573         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1574         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1575         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1576         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1577         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1578         /* init cursors */
1579         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1580         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1581         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1582         /* init appearance */
1583         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1584         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1585         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1586         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1587         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1588         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1589         /* init bars */
1590         updatebars();
1591         updatestatus();
1592         /* EWMH support per view */
1593         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1594                         PropModeReplace, (unsigned char *) netatom, NetLast);
1595         XDeleteProperty(dpy, root, netatom[NetClientList]);
1596         /* select for events */
1597         wa.cursor = cursor[CurNormal]->cursor;
1598         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1599                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1600         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1601         XSelectInput(dpy, root, wa.event_mask);
1602         grabkeys();
1603         focus(NULL);
1604 }
1605
1606 void
1607 showhide(Client *c)
1608 {
1609         if (!c)
1610                 return;
1611         if (ISVISIBLE(c)) {
1612                 /* show clients top down */
1613                 XMoveWindow(dpy, c->win, c->x, c->y);
1614                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1615                         resize(c, c->x, c->y, c->w, c->h, 0);
1616                 showhide(c->snext);
1617         } else {
1618                 /* hide clients bottom up */
1619                 showhide(c->snext);
1620                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1621         }
1622 }
1623
1624 void
1625 sigchld(int unused)
1626 {
1627         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1628                 die("can't install SIGCHLD handler:");
1629         while (0 < waitpid(-1, NULL, WNOHANG));
1630 }
1631
1632 void
1633 spawn(const Arg *arg)
1634 {
1635         if (arg->v == dmenucmd)
1636                 dmenumon[0] = '0' + selmon->num;
1637         if (fork() == 0) {
1638                 if (dpy)
1639                         close(ConnectionNumber(dpy));
1640                 setsid();
1641                 execvp(((char **)arg->v)[0], (char **)arg->v);
1642                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1643                 perror(" failed");
1644                 exit(EXIT_SUCCESS);
1645         }
1646 }
1647
1648 void
1649 tag(const Arg *arg)
1650 {
1651         if (selmon->sel && arg->ui & TAGMASK) {
1652                 selmon->sel->tags = arg->ui & TAGMASK;
1653                 focus(NULL);
1654                 arrange(selmon);
1655         }
1656 }
1657
1658 void
1659 tagmon(const Arg *arg)
1660 {
1661         if (!selmon->sel || !mons->next)
1662                 return;
1663         sendmon(selmon->sel, dirtomon(arg->i));
1664 }
1665
1666 void
1667 tile(Monitor *m)
1668 {
1669         unsigned int i, n, h, mw, my, ty;
1670         Client *c;
1671
1672         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1673         if (n == 0)
1674                 return;
1675
1676         if (n > m->nmaster)
1677                 mw = m->nmaster ? m->ww * m->mfact : 0;
1678         else
1679                 mw = m->ww;
1680         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1681                 if (i < m->nmaster) {
1682                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1683                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1684                         my += HEIGHT(c);
1685                 } else {
1686                         h = (m->wh - ty) / (n - i);
1687                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1688                         ty += HEIGHT(c);
1689                 }
1690 }
1691
1692 void
1693 togglebar(const Arg *arg)
1694 {
1695         selmon->showbar = !selmon->showbar;
1696         updatebarpos(selmon);
1697         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1698         arrange(selmon);
1699 }
1700
1701 void
1702 togglefloating(const Arg *arg)
1703 {
1704         if (!selmon->sel)
1705                 return;
1706         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1707                 return;
1708         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1709         if (selmon->sel->isfloating)
1710                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1711                        selmon->sel->w, selmon->sel->h, 0);
1712         arrange(selmon);
1713 }
1714
1715 void
1716 toggletag(const Arg *arg)
1717 {
1718         unsigned int newtags;
1719
1720         if (!selmon->sel)
1721                 return;
1722         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1723         if (newtags) {
1724                 selmon->sel->tags = newtags;
1725                 focus(NULL);
1726                 arrange(selmon);
1727         }
1728 }
1729
1730 void
1731 toggleview(const Arg *arg)
1732 {
1733         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1734
1735         if (newtagset) {
1736                 selmon->tagset[selmon->seltags] = newtagset;
1737                 focus(NULL);
1738                 arrange(selmon);
1739         }
1740 }
1741
1742 void
1743 unfocus(Client *c, int setfocus)
1744 {
1745         if (!c)
1746                 return;
1747         grabbuttons(c, 0);
1748         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->pix);
1749         if (setfocus) {
1750                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1751                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1752         }
1753 }
1754
1755 void
1756 unmanage(Client *c, int destroyed)
1757 {
1758         Monitor *m = c->mon;
1759         XWindowChanges wc;
1760
1761         /* The server grab construct avoids race conditions. */
1762         detach(c);
1763         detachstack(c);
1764         if (!destroyed) {
1765                 wc.border_width = c->oldbw;
1766                 XGrabServer(dpy);
1767                 XSetErrorHandler(xerrordummy);
1768                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1769                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1770                 setclientstate(c, WithdrawnState);
1771                 XSync(dpy, False);
1772                 XSetErrorHandler(xerror);
1773                 XUngrabServer(dpy);
1774         }
1775         free(c);
1776         focus(NULL);
1777         updateclientlist();
1778         arrange(m);
1779 }
1780
1781 void
1782 unmapnotify(XEvent *e)
1783 {
1784         Client *c;
1785         XUnmapEvent *ev = &e->xunmap;
1786
1787         if ((c = wintoclient(ev->window))) {
1788                 if (ev->send_event)
1789                         setclientstate(c, WithdrawnState);
1790                 else
1791                         unmanage(c, 0);
1792         }
1793 }
1794
1795 void
1796 updatebars(void)
1797 {
1798         Monitor *m;
1799         XSetWindowAttributes wa = {
1800                 .override_redirect = True,
1801                 .background_pixmap = ParentRelative,
1802                 .event_mask = ButtonPressMask|ExposureMask
1803         };
1804         for (m = mons; m; m = m->next) {
1805                 if (m->barwin)
1806                         continue;
1807                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1808                                           CopyFromParent, DefaultVisual(dpy, screen),
1809                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1810                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1811                 XMapRaised(dpy, m->barwin);
1812         }
1813 }
1814
1815 void
1816 updatebarpos(Monitor *m)
1817 {
1818         m->wy = m->my;
1819         m->wh = m->mh;
1820         if (m->showbar) {
1821                 m->wh -= bh;
1822                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1823                 m->wy = m->topbar ? m->wy + bh : m->wy;
1824         } else
1825                 m->by = -bh;
1826 }
1827
1828 void
1829 updateclientlist()
1830 {
1831         Client *c;
1832         Monitor *m;
1833
1834         XDeleteProperty(dpy, root, netatom[NetClientList]);
1835         for (m = mons; m; m = m->next)
1836                 for (c = m->clients; c; c = c->next)
1837                         XChangeProperty(dpy, root, netatom[NetClientList],
1838                                         XA_WINDOW, 32, PropModeAppend,
1839                                         (unsigned char *) &(c->win), 1);
1840 }
1841
1842 int
1843 updategeom(void)
1844 {
1845         int dirty = 0;
1846
1847 #ifdef XINERAMA
1848         if (XineramaIsActive(dpy)) {
1849                 int i, j, n, nn;
1850                 Client *c;
1851                 Monitor *m;
1852                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1853                 XineramaScreenInfo *unique = NULL;
1854
1855                 for (n = 0, m = mons; m; m = m->next, n++);
1856                 /* only consider unique geometries as separate screens */
1857                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1858                 for (i = 0, j = 0; i < nn; i++)
1859                         if (isuniquegeom(unique, j, &info[i]))
1860                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1861                 XFree(info);
1862                 nn = j;
1863                 if (n <= nn) {
1864                         for (i = 0; i < (nn - n); i++) { /* new monitors available */
1865                                 for (m = mons; m && m->next; m = m->next);
1866                                 if (m)
1867                                         m->next = createmon();
1868                                 else
1869                                         mons = createmon();
1870                         }
1871                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1872                                 if (i >= n
1873                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1874                                     || unique[i].width != m->mw || unique[i].height != m->mh))
1875                                 {
1876                                         dirty = 1;
1877                                         m->num = i;
1878                                         m->mx = m->wx = unique[i].x_org;
1879                                         m->my = m->wy = unique[i].y_org;
1880                                         m->mw = m->ww = unique[i].width;
1881                                         m->mh = m->wh = unique[i].height;
1882                                         updatebarpos(m);
1883                                 }
1884                 } else {
1885                         /* less monitors available nn < n */
1886                         for (i = nn; i < n; i++) {
1887                                 for (m = mons; m && m->next; m = m->next);
1888                                 while (m->clients) {
1889                                         dirty = 1;
1890                                         c = m->clients;
1891                                         m->clients = c->next;
1892                                         detachstack(c);
1893                                         c->mon = mons;
1894                                         attach(c);
1895                                         attachstack(c);
1896                                 }
1897                                 if (m == selmon)
1898                                         selmon = mons;
1899                                 cleanupmon(m);
1900                         }
1901                 }
1902                 free(unique);
1903         } else
1904 #endif /* XINERAMA */
1905         /* default monitor setup */
1906         {
1907                 if (!mons)
1908                         mons = createmon();
1909                 if (mons->mw != sw || mons->mh != sh) {
1910                         dirty = 1;
1911                         mons->mw = mons->ww = sw;
1912                         mons->mh = mons->wh = sh;
1913                         updatebarpos(mons);
1914                 }
1915         }
1916         if (dirty) {
1917                 selmon = mons;
1918                 selmon = wintomon(root);
1919         }
1920         return dirty;
1921 }
1922
1923 void
1924 updatenumlockmask(void)
1925 {
1926         unsigned int i, j;
1927         XModifierKeymap *modmap;
1928
1929         numlockmask = 0;
1930         modmap = XGetModifierMapping(dpy);
1931         for (i = 0; i < 8; i++)
1932                 for (j = 0; j < modmap->max_keypermod; j++)
1933                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1934                            == XKeysymToKeycode(dpy, XK_Num_Lock))
1935                                 numlockmask = (1 << i);
1936         XFreeModifiermap(modmap);
1937 }
1938
1939 void
1940 updatesizehints(Client *c)
1941 {
1942         long msize;
1943         XSizeHints size;
1944
1945         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1946                 /* size is uninitialized, ensure that size.flags aren't used */
1947                 size.flags = PSize;
1948         if (size.flags & PBaseSize) {
1949                 c->basew = size.base_width;
1950                 c->baseh = size.base_height;
1951         } else if (size.flags & PMinSize) {
1952                 c->basew = size.min_width;
1953                 c->baseh = size.min_height;
1954         } else
1955                 c->basew = c->baseh = 0;
1956         if (size.flags & PResizeInc) {
1957                 c->incw = size.width_inc;
1958                 c->inch = size.height_inc;
1959         } else
1960                 c->incw = c->inch = 0;
1961         if (size.flags & PMaxSize) {
1962                 c->maxw = size.max_width;
1963                 c->maxh = size.max_height;
1964         } else
1965                 c->maxw = c->maxh = 0;
1966         if (size.flags & PMinSize) {
1967                 c->minw = size.min_width;
1968                 c->minh = size.min_height;
1969         } else if (size.flags & PBaseSize) {
1970                 c->minw = size.base_width;
1971                 c->minh = size.base_height;
1972         } else
1973                 c->minw = c->minh = 0;
1974         if (size.flags & PAspect) {
1975                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1976                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1977         } else
1978                 c->maxa = c->mina = 0.0;
1979         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1980                      && c->maxw == c->minw && c->maxh == c->minh);
1981 }
1982
1983 void
1984 updatetitle(Client *c)
1985 {
1986         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1987                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1988         if (c->name[0] == '\0') /* hack to mark broken clients */
1989                 strcpy(c->name, broken);
1990 }
1991
1992 void
1993 updatestatus(void)
1994 {
1995         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1996                 strcpy(stext, "dwm-"VERSION);
1997         drawbar(selmon);
1998 }
1999
2000 void
2001 updatewindowtype(Client *c)
2002 {
2003         Atom state = getatomprop(c, netatom[NetWMState]);
2004         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2005
2006         if (state == netatom[NetWMFullscreen])
2007                 setfullscreen(c, 1);
2008         if (wtype == netatom[NetWMWindowTypeDialog])
2009                 c->isfloating = 1;
2010 }
2011
2012 void
2013 updatewmhints(Client *c)
2014 {
2015         XWMHints *wmh;
2016
2017         if ((wmh = XGetWMHints(dpy, c->win))) {
2018                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2019                         wmh->flags &= ~XUrgencyHint;
2020                         XSetWMHints(dpy, c->win, wmh);
2021                 } else
2022                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2023                 if (wmh->flags & InputHint)
2024                         c->neverfocus = !wmh->input;
2025                 else
2026                         c->neverfocus = 0;
2027                 XFree(wmh);
2028         }
2029 }
2030
2031 void
2032 view(const Arg *arg)
2033 {
2034         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2035                 return;
2036         selmon->seltags ^= 1; /* toggle sel tagset */
2037         if (arg->ui & TAGMASK)
2038                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2039         focus(NULL);
2040         arrange(selmon);
2041 }
2042
2043 Client *
2044 wintoclient(Window w)
2045 {
2046         Client *c;
2047         Monitor *m;
2048
2049         for (m = mons; m; m = m->next)
2050                 for (c = m->clients; c; c = c->next)
2051                         if (c->win == w)
2052                                 return c;
2053         return NULL;
2054 }
2055
2056 Monitor *
2057 wintomon(Window w)
2058 {
2059         int x, y;
2060         Client *c;
2061         Monitor *m;
2062
2063         if (w == root && getrootptr(&x, &y))
2064                 return recttomon(x, y, 1, 1);
2065         for (m = mons; m; m = m->next)
2066                 if (w == m->barwin)
2067                         return m;
2068         if ((c = wintoclient(w)))
2069                 return c->mon;
2070         return selmon;
2071 }
2072
2073 /* There's no way to check accesses to destroyed windows, thus those cases are
2074  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2075  * default error handler, which may call exit.  */
2076 int
2077 xerror(Display *dpy, XErrorEvent *ee)
2078 {
2079         if (ee->error_code == BadWindow
2080         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2081         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2082         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2083         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2084         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2085         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2086         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2087         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2088                 return 0;
2089         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2090                         ee->request_code, ee->error_code);
2091         return xerrorxlib(dpy, ee); /* may call exit */
2092 }
2093
2094 int
2095 xerrordummy(Display *dpy, XErrorEvent *ee)
2096 {
2097         return 0;
2098 }
2099
2100 /* Startup Error handler to check if another window manager
2101  * is already running. */
2102 int
2103 xerrorstart(Display *dpy, XErrorEvent *ee)
2104 {
2105         die("dwm: another window manager is already running\n");
2106         return -1;
2107 }
2108
2109 void
2110 zoom(const Arg *arg)
2111 {
2112         Client *c = selmon->sel;
2113
2114         if (!selmon->lt[selmon->sellt]->arrange
2115         || (selmon->sel && selmon->sel->isfloating))
2116                 return;
2117         if (c == nexttiled(selmon->clients))
2118                 if (!c || !(c = nexttiled(c->next)))
2119                         return;
2120         pop(c);
2121 }
2122
2123 int
2124 main(int argc, char *argv[])
2125 {
2126         if (argc == 2 && !strcmp("-v", argv[1]))
2127                 die("dwm-"VERSION "\n");
2128         else if (argc != 1)
2129                 die("usage: dwm [-v]\n");
2130         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2131                 fputs("warning: no locale support\n", stderr);
2132         if (!(dpy = XOpenDisplay(NULL)))
2133                 die("dwm: cannot open display\n");
2134         checkotherwm();
2135         setup();
2136         scan();
2137         run();
2138         cleanup();
2139         XCloseDisplay(dpy);
2140         return EXIT_SUCCESS;
2141 }