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_fontset_getwidth(drw, (X)) + lrpad)
  59 #define ColBorder               2
  60
  61 /* enums */
  62 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  63 enum { SchemeNorm, SchemeSel }; /* color schemes */
  64 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  65        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  66        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  67 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  68 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  69        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  70
  71 typedef union {
  72         int i;
  73         unsigned int ui;
  74         float f;
  75         const void *v;
  76 } Arg;
  77
  78 typedef struct {
  79         unsigned int click;
  80         unsigned int mask;
  81         unsigned int button;
  82         void (*func)(const Arg *arg);
  83         const Arg arg;
  84 } Button;
  85
  86 typedef struct Monitor Monitor;
  87 typedef struct Client Client;
  88 struct Client {
  89         char name[256];
  90         float mina, maxa;
  91         int x, y, w, h;
  92         int oldx, oldy, oldw, oldh;
  93         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  94         int bw, oldbw;
  95         unsigned int tags;
  96         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  97         Client *next;
  98         Client *snext;
  99         Monitor *mon;
 100         Window win;
 101 };
 102
 103 typedef struct {
 104         unsigned int mod;
 105         KeySym keysym;
 106         void (*func)(const Arg *);
 107         const Arg arg;
 108 } Key;
 109
 110 typedef struct {
 111         const char *symbol;
 112         void (*arrange)(Monitor *);
 113 } Layout;
 114
 115 struct Monitor {
 116         char ltsymbol[16];
 117         float mfact;
 118         int nmaster;
 119         int num;
 120         int by;               /* bar geometry */
 121         int mx, my, mw, mh;   /* screen size */
 122         int wx, wy, ww, wh;   /* window area  */
 123         unsigned int seltags;
 124         unsigned int sellt;
 125         unsigned int tagset[2];
 126         int showbar;
 127         int topbar;
 128         Client *clients;
 129         Client *sel;
 130         Client *stack;
 131         Monitor *next;
 132         Window barwin;
 133         const Layout *lt[2];
 134 };
 135
 136 typedef struct {
 137         const char *class;
 138         const char *instance;
 139         const char *title;
 140         unsigned int tags;
 141         int isfloating;
 142         int monitor;
 143 } Rule;
 144
 145 /* function declarations */
 146 static void applyrules(Client *c);
 147 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 148 static void arrange(Monitor *m);
 149 static void arrangemon(Monitor *m);
 150 static void attach(Client *c);
 151 static void attachstack(Client *c);
 152 static void buttonpress(XEvent *e);
 153 static void checkotherwm(void);
 154 static void cleanup(void);
 155 static void cleanupmon(Monitor *mon);
 156 static void clearurgent(Client *c);
 157 static void clientmessage(XEvent *e);
 158 static void configure(Client *c);
 159 static void configurenotify(XEvent *e);
 160 static void configurerequest(XEvent *e);
 161 static Monitor *createmon(void);
 162 static void destroynotify(XEvent *e);
 163 static void detach(Client *c);
 164 static void detachstack(Client *c);
 165 static Monitor *dirtomon(int dir);
 166 static void drawbar(Monitor *m);
 167 static void drawbars(void);
 168 static void enternotify(XEvent *e);
 169 static void expose(XEvent *e);
 170 static void focus(Client *c);
 171 static void focusin(XEvent *e);
 172 static void focusmon(const Arg *arg);
 173 static void focusstack(const Arg *arg);
 174 static int getrootptr(int *x, int *y);
 175 static long getstate(Window w);
 176 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 177 static void grabbuttons(Client *c, int focused);
 178 static void grabkeys(void);
 179 static void incnmaster(const Arg *arg);
 180 static void keypress(XEvent *e);
 181 static void killclient(const Arg *arg);
 182 static void manage(Window w, XWindowAttributes *wa);
 183 static void mappingnotify(XEvent *e);
 184 static void maprequest(XEvent *e);
 185 static void monocle(Monitor *m);
 186 static void motionnotify(XEvent *e);
 187 static void movemouse(const Arg *arg);
 188 static Client *nexttiled(Client *c);
 189 static void pop(Client *);
 190 static void propertynotify(XEvent *e);
 191 static void quit(const Arg *arg);
 192 static Monitor *recttomon(int x, int y, int w, int h);
 193 static void resize(Client *c, int x, int y, int w, int h, int interact);
 194 static void resizeclient(Client *c, int x, int y, int w, int h);
 195 static void resizemouse(const Arg *arg);
 196 static void restack(Monitor *m);
 197 static void run(void);
 198 static void scan(void);
 199 static int sendevent(Client *c, Atom proto);
 200 static void sendmon(Client *c, Monitor *m);
 201 static void setclientstate(Client *c, long state);
 202 static void setfocus(Client *c);
 203 static void setfullscreen(Client *c, int fullscreen);
 204 static void setlayout(const Arg *arg);
 205 static void setmfact(const Arg *arg);
 206 static void setup(void);
 207 static void showhide(Client *c);
 208 static void sigchld(int unused);
 209 static void spawn(const Arg *arg);
 210 static void tag(const Arg *arg);
 211 static void tagmon(const Arg *arg);
 212 static void tile(Monitor *);
 213 static void togglebar(const Arg *arg);
 214 static void togglefloating(const Arg *arg);
 215 static void toggletag(const Arg *arg);
 216 static void toggleview(const Arg *arg);
 217 static void unfocus(Client *c, int setfocus);
 218 static void unmanage(Client *c, int destroyed);
 219 static void unmapnotify(XEvent *e);
 220 static int updategeom(void);
 221 static void updatebarpos(Monitor *m);
 222 static void updatebars(void);
 223 static void updateclientlist(void);
 224 static void updatenumlockmask(void);
 225 static void updatesizehints(Client *c);
 226 static void updatestatus(void);
 227 static void updatewindowtype(Client *c);
 228 static void updatetitle(Client *c);
 229 static void updatewmhints(Client *c);
 230 static void view(const Arg *arg);
 231 static Client *wintoclient(Window w);
 232 static Monitor *wintomon(Window w);
 233 static int xerror(Display *dpy, XErrorEvent *ee);
 234 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 235 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 236 static void zoom(const Arg *arg);
 237
 238 /* variables */
 239 static const char broken[] = "broken";
 240 static char stext[256];
 241 static int screen;
 242 static int sw, sh;           /* X display screen geometry width, height */
 243 static int bh, blw = 0;      /* bar geometry */
 244 static int lrpad;            /* sum of left and right padding for text */
 245 static int (*xerrorxlib)(Display *, XErrorEvent *);
 246 static unsigned int numlockmask = 0;
 247 static void (*handler[LASTEvent]) (XEvent *) = {
 248         [ButtonPress] = buttonpress,
 249         [ClientMessage] = clientmessage,
 250         [ConfigureRequest] = configurerequest,
 251         [ConfigureNotify] = configurenotify,
 252         [DestroyNotify] = destroynotify,
 253         [EnterNotify] = enternotify,
 254         [Expose] = expose,
 255         [FocusIn] = focusin,
 256         [KeyPress] = keypress,
 257         [MappingNotify] = mappingnotify,
 258         [MapRequest] = maprequest,
 259         [MotionNotify] = motionnotify,
 260         [PropertyNotify] = propertynotify,
 261         [UnmapNotify] = unmapnotify
 262 };
 263 static Atom wmatom[WMLast], netatom[NetLast];
 264 static int running = 1;
 265 static Cur *cursor[CurLast];
 266 static Scm *scheme;
 267 static Display *dpy;
 268 static Drw *drw;
 269 static Monitor *mons, *selmon;
 270 static Window root, wmcheckwin;
 271
 272 /* configuration, allows nested code to access above variables */
 273 #include "config.h"
 274
 275 /* compile-time check if all tags fit into an unsigned int bit array. */
 276 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 277
 278 /* function implementations */
 279 void
 280 applyrules(Client *c)
 281 {
 282         const char *class, *instance;
 283         unsigned int i;
 284         const Rule *r;
 285         Monitor *m;
 286         XClassHint ch = { NULL, NULL };
 287
 288         /* rule matching */
 289         c->isfloating = 0;
 290         c->tags = 0;
 291         XGetClassHint(dpy, c->win, &ch);
 292         class    = ch.res_class ? ch.res_class : broken;
 293         instance = ch.res_name  ? ch.res_name  : broken;
 294
 295         for (i = 0; i < LENGTH(rules); i++) {
 296                 r = &rules[i];
 297                 if ((!r->title || strstr(c->name, r->title))
 298                 && (!r->class || strstr(class, r->class))
 299                 && (!r->instance || strstr(instance, r->instance)))
 300                 {
 301                         c->isfloating = r->isfloating;
 302                         c->tags |= r->tags;
 303                         for (m = mons; m && m->num != r->monitor; m = m->next);
 304                         if (m)
 305                                 c->mon = m;
 306                 }
 307         }
 308         if (ch.res_class)
 309                 XFree(ch.res_class);
 310         if (ch.res_name)
 311                 XFree(ch.res_name);
 312         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 313 }
 314
 315 int
 316 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 317 {
 318         int baseismin;
 319         Monitor *m = c->mon;
 320
 321         /* set minimum possible */
 322         *w = MAX(1, *w);
 323         *h = MAX(1, *h);
 324         if (interact) {
 325                 if (*x > sw)
 326                         *x = sw - WIDTH(c);
 327                 if (*y > sh)
 328                         *y = sh - HEIGHT(c);
 329                 if (*x + *w + 2 * c->bw < 0)
 330                         *x = 0;
 331                 if (*y + *h + 2 * c->bw < 0)
 332                         *y = 0;
 333         } else {
 334                 if (*x >= m->wx + m->ww)
 335                         *x = m->wx + m->ww - WIDTH(c);
 336                 if (*y >= m->wy + m->wh)
 337                         *y = m->wy + m->wh - HEIGHT(c);
 338                 if (*x + *w + 2 * c->bw <= m->wx)
 339                         *x = m->wx;
 340                 if (*y + *h + 2 * c->bw <= m->wy)
 341                         *y = m->wy;
 342         }
 343         if (*h < bh)
 344                 *h = bh;
 345         if (*w < bh)
 346                 *w = bh;
 347         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 348                 /* see last two sentences in ICCCM 4.1.2.3 */
 349                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 350                 if (!baseismin) { /* temporarily remove base dimensions */
 351                         *w -= c->basew;
 352                         *h -= c->baseh;
 353                 }
 354                 /* adjust for aspect limits */
 355                 if (c->mina > 0 && c->maxa > 0) {
 356                         if (c->maxa < (float)*w / *h)
 357                                 *w = *h * c->maxa + 0.5;
 358                         else if (c->mina < (float)*h / *w)
 359                                 *h = *w * c->mina + 0.5;
 360                 }
 361                 if (baseismin) { /* increment calculation requires this */
 362                         *w -= c->basew;
 363                         *h -= c->baseh;
 364                 }
 365                 /* adjust for increment value */
 366                 if (c->incw)
 367                         *w -= *w % c->incw;
 368                 if (c->inch)
 369                         *h -= *h % c->inch;
 370                 /* restore base dimensions */
 371                 *w = MAX(*w + c->basew, c->minw);
 372                 *h = MAX(*h + c->baseh, c->minh);
 373                 if (c->maxw)
 374                         *w = MIN(*w, c->maxw);
 375                 if (c->maxh)
 376                         *h = MIN(*h, c->maxh);
 377         }
 378         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 379 }
 380
 381 void
 382 arrange(Monitor *m)
 383 {
 384         if (m)
 385                 showhide(m->stack);
 386         else for (m = mons; m; m = m->next)
 387                 showhide(m->stack);
 388         if (m) {
 389                 arrangemon(m);
 390                 restack(m);
 391         } else for (m = mons; m; m = m->next)
 392                 arrangemon(m);
 393 }
 394
 395 void
 396 arrangemon(Monitor *m)
 397 {
 398         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 399         if (m->lt[m->sellt]->arrange)
 400                 m->lt[m->sellt]->arrange(m);
 401 }
 402
 403 void
 404 attach(Client *c)
 405 {
 406         c->next = c->mon->clients;
 407         c->mon->clients = c;
 408 }
 409
 410 void
 411 attachstack(Client *c)
 412 {
 413         c->snext = c->mon->stack;
 414         c->mon->stack = c;
 415 }
 416
 417 void
 418 buttonpress(XEvent *e)
 419 {
 420         unsigned int i, x, click;
 421         Arg arg = {0};
 422         Client *c;
 423         Monitor *m;
 424         XButtonPressedEvent *ev = &e->xbutton;
 425
 426         click = ClkRootWin;
 427         /* focus monitor if necessary */
 428         if ((m = wintomon(ev->window)) && m != selmon) {
 429                 unfocus(selmon->sel, 1);
 430                 selmon = m;
 431                 focus(NULL);
 432         }
 433         if (ev->window == selmon->barwin) {
 434                 i = x = 0;
 435                 do
 436                         x += TEXTW(tags[i]);
 437                 while (ev->x >= x && ++i < LENGTH(tags));
 438                 if (i < LENGTH(tags)) {
 439                         click = ClkTagBar;
 440                         arg.ui = 1 << i;
 441                 } else if (ev->x < x + blw)
 442                         click = ClkLtSymbol;
 443                 else if (ev->x > selmon->ww - TEXTW(stext))
 444                         click = ClkStatusText;
 445                 else
 446                         click = ClkWinTitle;
 447         } else if ((c = wintoclient(ev->window))) {
 448                 focus(c);
 449                 click = ClkClientWin;
 450         }
 451         for (i = 0; i < LENGTH(buttons); i++)
 452                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 453                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 454                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 455 }
 456
 457 void
 458 checkotherwm(void)
 459 {
 460         xerrorxlib = XSetErrorHandler(xerrorstart);
 461         /* this causes an error if some other window manager is running */
 462         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 463         XSync(dpy, False);
 464         XSetErrorHandler(xerror);
 465         XSync(dpy, False);
 466 }
 467
 468 void
 469 cleanup(void)
 470 {
 471         Arg a = {.ui = ~0};
 472         Layout foo = { "", NULL };
 473         Monitor *m;
 474         size_t i;
 475
 476         view(&a);
 477         selmon->lt[selmon->sellt] = &foo;
 478         for (m = mons; m; m = m->next)
 479                 while (m->stack)
 480                         unmanage(m->stack, 0);
 481         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 482         while (mons)
 483                 cleanupmon(mons);
 484         for (i = 0; i < CurLast; i++)
 485                 drw_cur_free(drw, cursor[i]);
 486         for (i = 0; i < LENGTH(colors); i++)
 487                 free(scheme[i]);
 488         XDestroyWindow(dpy, wmcheckwin);
 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         Client *c;
 569         XConfigureEvent *ev = &e->xconfigure;
 570         int dirty;
 571
 572         /* TODO: updategeom handling sucks, needs to be simplified */
 573         if (ev->window == root) {
 574                 dirty = (sw != ev->width || sh != ev->height);
 575                 sw = ev->width;
 576                 sh = ev->height;
 577                 if (updategeom() || dirty) {
 578                         drw_resize(drw, sw, bh);
 579                         updatebars();
 580                         for (m = mons; m; m = m->next) {
 581                                 for (c = m->clients; c; c = c->next)
 582                                         if (c->isfullscreen)
 583                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 584                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 585                         }
 586                         focus(NULL);
 587                         arrange(NULL);
 588                 }
 589         }
 590 }
 591
 592 void
 593 configurerequest(XEvent *e)
 594 {
 595         Client *c;
 596         Monitor *m;
 597         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 598         XWindowChanges wc;
 599
 600         if ((c = wintoclient(ev->window))) {
 601                 if (ev->value_mask & CWBorderWidth)
 602                         c->bw = ev->border_width;
 603                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 604                         m = c->mon;
 605                         if (ev->value_mask & CWX) {
 606                                 c->oldx = c->x;
 607                                 c->x = m->mx + ev->x;
 608                         }
 609                         if (ev->value_mask & CWY) {
 610                                 c->oldy = c->y;
 611                                 c->y = m->my + ev->y;
 612                         }
 613                         if (ev->value_mask & CWWidth) {
 614                                 c->oldw = c->w;
 615                                 c->w = ev->width;
 616                         }
 617                         if (ev->value_mask & CWHeight) {
 618                                 c->oldh = c->h;
 619                                 c->h = ev->height;
 620                         }
 621                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 622                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 623                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 624                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 625                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 626                                 configure(c);
 627                         if (ISVISIBLE(c))
 628                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 629                 } else
 630                         configure(c);
 631         } else {
 632                 wc.x = ev->x;
 633                 wc.y = ev->y;
 634                 wc.width = ev->width;
 635                 wc.height = ev->height;
 636                 wc.border_width = ev->border_width;
 637                 wc.sibling = ev->above;
 638                 wc.stack_mode = ev->detail;
 639                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 640         }
 641         XSync(dpy, False);
 642 }
 643
 644 Monitor *
 645 createmon(void)
 646 {
 647         Monitor *m;
 648
 649         m = ecalloc(1, sizeof(Monitor));
 650         m->tagset[0] = m->tagset[1] = 1;
 651         m->mfact = mfact;
 652         m->nmaster = nmaster;
 653         m->showbar = showbar;
 654         m->topbar = topbar;
 655         m->lt[0] = &layouts[0];
 656         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 657         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 658         return m;
 659 }
 660
 661 void
 662 destroynotify(XEvent *e)
 663 {
 664         Client *c;
 665         XDestroyWindowEvent *ev = &e->xdestroywindow;
 666
 667         if ((c = wintoclient(ev->window)))
 668                 unmanage(c, 1);
 669 }
 670
 671 void
 672 detach(Client *c)
 673 {
 674         Client **tc;
 675
 676         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 677         *tc = c->next;
 678 }
 679
 680 void
 681 detachstack(Client *c)
 682 {
 683         Client **tc, *t;
 684
 685         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 686         *tc = c->snext;
 687
 688         if (c == c->mon->sel) {
 689                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 690                 c->mon->sel = t;
 691         }
 692 }
 693
 694 Monitor *
 695 dirtomon(int dir)
 696 {
 697         Monitor *m = NULL;
 698
 699         if (dir > 0) {
 700                 if (!(m = selmon->next))
 701                         m = mons;
 702         } else if (selmon == mons)
 703                 for (m = mons; m->next; m = m->next);
 704         else
 705                 for (m = mons; m->next != selmon; m = m->next);
 706         return m;
 707 }
 708
 709 void
 710 drawbar(Monitor *m)
 711 {
 712         int x, w, sw = 0;
 713         int boxs = drw->fonts->h / 9;
 714         int boxw = drw->fonts->h / 6 + 2;
 715         unsigned int i, occ = 0, urg = 0;
 716         Client *c;
 717
 718         /* draw status first so it can be overdrawn by tags later */
 719         if (m == selmon) { /* status is only drawn on selected monitor */
 720                 drw_setscheme(drw, scheme[SchemeNorm]);
 721                 sw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 722                 drw_text(drw, m->ww - sw, 0, sw, bh, 0, stext, 0);
 723         }
 724
 725         for (c = m->clients; c; c = c->next) {
 726                 occ |= c->tags;
 727                 if (c->isurgent)
 728                         urg |= c->tags;
 729         }
 730         x = 0;
 731         for (i = 0; i < LENGTH(tags); i++) {
 732                 w = TEXTW(tags[i]);
 733                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 734                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 735                 if (occ & 1 << i)
 736                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 737                                  m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 738                                  urg & 1 << i);
 739                 x += w;
 740         }
 741         w = blw = TEXTW(m->ltsymbol);
 742         drw_setscheme(drw, scheme[SchemeNorm]);
 743         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 744
 745         if ((w = m->ww - sw - x) > bh) {
 746                 if (m->sel) {
 747                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 748                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 749                         if (m->sel->isfloating)
 750                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 751                 } else {
 752                         drw_setscheme(drw, scheme[SchemeNorm]);
 753                         drw_rect(drw, x, 0, w, bh, 1, 1);
 754                 }
 755         }
 756         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 757 }
 758
 759 void
 760 drawbars(void)
 761 {
 762         Monitor *m;
 763
 764         for (m = mons; m; m = m->next)
 765                 drawbar(m);
 766 }
 767
 768 void
 769 enternotify(XEvent *e)
 770 {
 771         Client *c;
 772         Monitor *m;
 773         XCrossingEvent *ev = &e->xcrossing;
 774
 775         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 776                 return;
 777         c = wintoclient(ev->window);
 778         m = c ? c->mon : wintomon(ev->window);
 779         if (m != selmon) {
 780                 unfocus(selmon->sel, 1);
 781                 selmon = m;
 782         } else if (!c || c == selmon->sel)
 783                 return;
 784         focus(c);
 785 }
 786
 787 void
 788 expose(XEvent *e)
 789 {
 790         Monitor *m;
 791         XExposeEvent *ev = &e->xexpose;
 792
 793         if (ev->count == 0 && (m = wintomon(ev->window)))
 794                 drawbar(m);
 795 }
 796
 797 void
 798 focus(Client *c)
 799 {
 800         if (!c || !ISVISIBLE(c))
 801                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 802         /* was if (selmon->sel) */
 803         if (selmon->sel && selmon->sel != c)
 804                 unfocus(selmon->sel, 0);
 805         if (c) {
 806                 if (c->mon != selmon)
 807                         selmon = c->mon;
 808                 if (c->isurgent)
 809                         clearurgent(c);
 810                 detachstack(c);
 811                 attachstack(c);
 812                 grabbuttons(c, 1);
 813                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 814                 setfocus(c);
 815         } else {
 816                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 817                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 818         }
 819         selmon->sel = c;
 820         drawbars();
 821 }
 822
 823 /* there are some broken focus acquiring clients */
 824 void
 825 focusin(XEvent *e)
 826 {
 827         XFocusChangeEvent *ev = &e->xfocus;
 828
 829         if (selmon->sel && ev->window != selmon->sel->win)
 830                 setfocus(selmon->sel);
 831 }
 832
 833 void
 834 focusmon(const Arg *arg)
 835 {
 836         Monitor *m;
 837
 838         if (!mons->next)
 839                 return;
 840         if ((m = dirtomon(arg->i)) == selmon)
 841                 return;
 842         unfocus(selmon->sel, 0); /* s/1/0/ fixes input focus issues
 843                                         in gedit and anjuta */
 844         selmon = m;
 845         focus(NULL);
 846 }
 847
 848 void
 849 focusstack(const Arg *arg)
 850 {
 851         Client *c = NULL, *i;
 852
 853         if (!selmon->sel)
 854                 return;
 855         if (arg->i > 0) {
 856                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 857                 if (!c)
 858                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 859         } else {
 860                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 861                         if (ISVISIBLE(i))
 862                                 c = i;
 863                 if (!c)
 864                         for (; i; i = i->next)
 865                                 if (ISVISIBLE(i))
 866                                         c = i;
 867         }
 868         if (c) {
 869                 focus(c);
 870                 restack(selmon);
 871         }
 872 }
 873
 874 Atom
 875 getatomprop(Client *c, Atom prop)
 876 {
 877         int di;
 878         unsigned long dl;
 879         unsigned char *p = NULL;
 880         Atom da, atom = None;
 881
 882         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 883                               &da, &di, &dl, &dl, &p) == Success && p) {
 884                 atom = *(Atom *)p;
 885                 XFree(p);
 886         }
 887         return atom;
 888 }
 889
 890 int
 891 getrootptr(int *x, int *y)
 892 {
 893         int di;
 894         unsigned int dui;
 895         Window dummy;
 896
 897         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 898 }
 899
 900 long
 901 getstate(Window w)
 902 {
 903         int format;
 904         long result = -1;
 905         unsigned char *p = NULL;
 906         unsigned long n, extra;
 907         Atom real;
 908
 909         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 910                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 911                 return -1;
 912         if (n != 0)
 913                 result = *p;
 914         XFree(p);
 915         return result;
 916 }
 917
 918 int
 919 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 920 {
 921         char **list = NULL;
 922         int n;
 923         XTextProperty name;
 924
 925         if (!text || size == 0)
 926                 return 0;
 927         text[0] = '\0';
 928         XGetTextProperty(dpy, w, &name, atom);
 929         if (!name.nitems)
 930                 return 0;
 931         if (name.encoding == XA_STRING)
 932                 strncpy(text, (char *)name.value, size - 1);
 933         else {
 934                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 935                         strncpy(text, *list, size - 1);
 936                         XFreeStringList(list);
 937                 }
 938         }
 939         text[size - 1] = '\0';
 940         XFree(name.value);
 941         return 1;
 942 }
 943
 944 void
 945 grabbuttons(Client *c, int focused)
 946 {
 947         updatenumlockmask();
 948         {
 949                 unsigned int i, j;
 950                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 951                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 952                 if (focused) {
 953                         for (i = 0; i < LENGTH(buttons); i++)
 954                                 if (buttons[i].click == ClkClientWin)
 955                                         for (j = 0; j < LENGTH(modifiers); j++)
 956                                                 XGrabButton(dpy, buttons[i].button,
 957                                                             buttons[i].mask | modifiers[j],
 958                                                             c->win, False, BUTTONMASK,
 959                                                             GrabModeAsync, GrabModeSync, None, None);
 960                 } else
 961                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 962                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 963         }
 964 }
 965
 966 void
 967 grabkeys(void)
 968 {
 969         updatenumlockmask();
 970         {
 971                 unsigned int i, j;
 972                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 973                 KeyCode code;
 974
 975                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 976                 for (i = 0; i < LENGTH(keys); i++)
 977                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 978                                 for (j = 0; j < LENGTH(modifiers); j++)
 979                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 980                                                  True, GrabModeAsync, GrabModeAsync);
 981         }
 982 }
 983
 984 void
 985 incnmaster(const Arg *arg)
 986 {
 987         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 988         arrange(selmon);
 989 }
 990
 991 #ifdef XINERAMA
 992 static int
 993 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 994 {
 995         while (n--)
 996                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 997                 && unique[n].width == info->width && unique[n].height == info->height)
 998                         return 0;
 999         return 1;
1000 }
1001 #endif /* XINERAMA */
1002
1003 void
1004 keypress(XEvent *e)
1005 {
1006         unsigned int i;
1007         KeySym keysym;
1008         XKeyEvent *ev;
1009
1010         ev = &e->xkey;
1011         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1012         for (i = 0; i < LENGTH(keys); i++)
1013                 if (keysym == keys[i].keysym
1014                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1015                 && keys[i].func)
1016                         keys[i].func(&(keys[i].arg));
1017 }
1018
1019 void
1020 killclient(const Arg *arg)
1021 {
1022         if (!selmon->sel)
1023                 return;
1024         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1025                 XGrabServer(dpy);
1026                 XSetErrorHandler(xerrordummy);
1027                 XSetCloseDownMode(dpy, DestroyAll);
1028                 XKillClient(dpy, selmon->sel->win);
1029                 XSync(dpy, False);
1030                 XSetErrorHandler(xerror);
1031                 XUngrabServer(dpy);
1032         }
1033 }
1034
1035 void
1036 manage(Window w, XWindowAttributes *wa)
1037 {
1038         Client *c, *t = NULL;
1039         Window trans = None;
1040         XWindowChanges wc;
1041
1042         c = ecalloc(1, sizeof(Client));
1043         c->win = w;
1044         /* geometry */
1045         c->x = c->oldx = wa->x;
1046         c->y = c->oldy = wa->y;
1047         c->w = c->oldw = wa->width;
1048         c->h = c->oldh = wa->height;
1049         c->oldbw = wa->border_width;
1050
1051         updatetitle(c);
1052         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1053                 c->mon = t->mon;
1054                 c->tags = t->tags;
1055         } else {
1056                 c->mon = selmon;
1057                 applyrules(c);
1058         }
1059
1060         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1061                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1062         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1063                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1064         c->x = MAX(c->x, c->mon->mx);
1065         /* only fix client y-offset, if the client center might cover the bar */
1066         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1067                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1068         c->bw = borderpx;
1069
1070         wc.border_width = c->bw;
1071         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1072         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1073         configure(c); /* propagates border_width, if size doesn't change */
1074         updatewindowtype(c);
1075         updatesizehints(c);
1076         updatewmhints(c);
1077         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1078         grabbuttons(c, 0);
1079         if (!c->isfloating)
1080                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1081         if (c->isfloating)
1082                 XRaiseWindow(dpy, c->win);
1083         attach(c);
1084         attachstack(c);
1085         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1086                         (unsigned char *) &(c->win), 1);
1087         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1088         setclientstate(c, NormalState);
1089         if (c->mon == selmon)
1090                 unfocus(selmon->sel, 0);
1091         c->mon->sel = c;
1092         arrange(c->mon);
1093         XMapWindow(dpy, c->win);
1094         focus(NULL);
1095 }
1096
1097 void
1098 mappingnotify(XEvent *e)
1099 {
1100         XMappingEvent *ev = &e->xmapping;
1101
1102         XRefreshKeyboardMapping(ev);
1103         if (ev->request == MappingKeyboard)
1104                 grabkeys();
1105 }
1106
1107 void
1108 maprequest(XEvent *e)
1109 {
1110         static XWindowAttributes wa;
1111         XMapRequestEvent *ev = &e->xmaprequest;
1112
1113         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1114                 return;
1115         if (wa.override_redirect)
1116                 return;
1117         if (!wintoclient(ev->window))
1118                 manage(ev->window, &wa);
1119 }
1120
1121 void
1122 monocle(Monitor *m)
1123 {
1124         unsigned int n = 0;
1125         Client *c;
1126
1127         for (c = m->clients; c; c = c->next)
1128                 if (ISVISIBLE(c))
1129                         n++;
1130         if (n > 0) /* override layout symbol */
1131                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1132         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1133                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1134 }
1135
1136 void
1137 motionnotify(XEvent *e)
1138 {
1139         static Monitor *mon = NULL;
1140         Monitor *m;
1141         XMotionEvent *ev = &e->xmotion;
1142
1143         if (ev->window != root)
1144                 return;
1145         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1146                 unfocus(selmon->sel, 1);
1147                 selmon = m;
1148                 focus(NULL);
1149         }
1150         mon = m;
1151 }
1152
1153 void
1154 movemouse(const Arg *arg)
1155 {
1156         int x, y, ocx, ocy, nx, ny;
1157         Client *c;
1158         Monitor *m;
1159         XEvent ev;
1160         Time lasttime = 0;
1161
1162         if (!(c = selmon->sel))
1163                 return;
1164         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1165                 return;
1166         restack(selmon);
1167         ocx = c->x;
1168         ocy = c->y;
1169         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1170         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1171                 return;
1172         if (!getrootptr(&x, &y))
1173                 return;
1174         do {
1175                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1176                 switch(ev.type) {
1177                 case ConfigureRequest:
1178                 case Expose:
1179                 case MapRequest:
1180                         handler[ev.type](&ev);
1181                         break;
1182                 case MotionNotify:
1183                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1184                                 continue;
1185                         lasttime = ev.xmotion.time;
1186
1187                         nx = ocx + (ev.xmotion.x - x);
1188                         ny = ocy + (ev.xmotion.y - y);
1189                         if (nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1190                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1191                                 if (abs(selmon->wx - nx) < snap)
1192                                         nx = selmon->wx;
1193                                 else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1194                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1195                                 if (abs(selmon->wy - ny) < snap)
1196                                         ny = selmon->wy;
1197                                 else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1198                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1199                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1200                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1201                                         togglefloating(NULL);
1202                         }
1203                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1204                                 resize(c, nx, ny, c->w, c->h, 1);
1205                         break;
1206                 }
1207         } while (ev.type != ButtonRelease);
1208         XUngrabPointer(dpy, CurrentTime);
1209         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1210                 sendmon(c, m);
1211                 selmon = m;
1212                 focus(NULL);
1213         }
1214 }
1215
1216 Client *
1217 nexttiled(Client *c)
1218 {
1219         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1220         return c;
1221 }
1222
1223 void
1224 pop(Client *c)
1225 {
1226         detach(c);
1227         attach(c);
1228         focus(c);
1229         arrange(c->mon);
1230 }
1231
1232 void
1233 propertynotify(XEvent *e)
1234 {
1235         Client *c;
1236         Window trans;
1237         XPropertyEvent *ev = &e->xproperty;
1238
1239         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1240                 updatestatus();
1241         else if (ev->state == PropertyDelete)
1242                 return; /* ignore */
1243         else if ((c = wintoclient(ev->window))) {
1244                 switch(ev->atom) {
1245                 default: break;
1246                 case XA_WM_TRANSIENT_FOR:
1247                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1248                            (c->isfloating = (wintoclient(trans)) != NULL))
1249                                 arrange(c->mon);
1250                         break;
1251                 case XA_WM_NORMAL_HINTS:
1252                         updatesizehints(c);
1253                         break;
1254                 case XA_WM_HINTS:
1255                         updatewmhints(c);
1256                         drawbars();
1257                         break;
1258                 }
1259                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1260                         updatetitle(c);
1261                         if (c == c->mon->sel)
1262                                 drawbar(c->mon);
1263                 }
1264                 if (ev->atom == netatom[NetWMWindowType])
1265                         updatewindowtype(c);
1266         }
1267 }
1268
1269 void
1270 quit(const Arg *arg)
1271 {
1272         running = 0;
1273 }
1274
1275 Monitor *
1276 recttomon(int x, int y, int w, int h)
1277 {
1278         Monitor *m, *r = selmon;
1279         int a, area = 0;
1280
1281         for (m = mons; m; m = m->next)
1282                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1283                         area = a;
1284                         r = m;
1285                 }
1286         return r;
1287 }
1288
1289 void
1290 resize(Client *c, int x, int y, int w, int h, int interact)
1291 {
1292         if (applysizehints(c, &x, &y, &w, &h, interact))
1293                 resizeclient(c, x, y, w, h);
1294 }
1295
1296 void
1297 resizeclient(Client *c, int x, int y, int w, int h)
1298 {
1299         XWindowChanges wc;
1300
1301         c->oldx = c->x; c->x = wc.x = x;
1302         c->oldy = c->y; c->y = wc.y = y;
1303         c->oldw = c->w; c->w = wc.width = w;
1304         c->oldh = c->h; c->h = wc.height = h;
1305         wc.border_width = c->bw;
1306         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1307         configure(c);
1308         XSync(dpy, False);
1309 }
1310
1311 void
1312 resizemouse(const Arg *arg)
1313 {
1314         int ocx, ocy, nw, nh;
1315         Client *c;
1316         Monitor *m;
1317         XEvent ev;
1318         Time lasttime = 0;
1319
1320         if (!(c = selmon->sel))
1321                 return;
1322         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1323                 return;
1324         restack(selmon);
1325         ocx = c->x;
1326         ocy = c->y;
1327         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1328                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1329                 return;
1330         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1331         do {
1332                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1333                 switch(ev.type) {
1334                 case ConfigureRequest:
1335                 case Expose:
1336                 case MapRequest:
1337                         handler[ev.type](&ev);
1338                         break;
1339                 case MotionNotify:
1340                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1341                                 continue;
1342                         lasttime = ev.xmotion.time;
1343
1344                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1345                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1346                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1347                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1348                         {
1349                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1350                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1351                                         togglefloating(NULL);
1352                         }
1353                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1354                                 resize(c, c->x, c->y, nw, nh, 1);
1355                         break;
1356                 }
1357         } while (ev.type != ButtonRelease);
1358         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1359         XUngrabPointer(dpy, CurrentTime);
1360         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1361         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1362                 sendmon(c, m);
1363                 selmon = m;
1364                 focus(NULL);
1365         }
1366 }
1367
1368 void
1369 restack(Monitor *m)
1370 {
1371         Client *c;
1372         XEvent ev;
1373         XWindowChanges wc;
1374
1375         drawbar(m);
1376         if (!m->sel)
1377                 return;
1378         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1379                 XRaiseWindow(dpy, m->sel->win);
1380         if (m->lt[m->sellt]->arrange) {
1381                 wc.stack_mode = Below;
1382                 wc.sibling = m->barwin;
1383                 for (c = m->stack; c; c = c->snext)
1384                         if (!c->isfloating && ISVISIBLE(c)) {
1385                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1386                                 wc.sibling = c->win;
1387                         }
1388         }
1389         XSync(dpy, False);
1390         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1391 }
1392
1393 void
1394 run(void)
1395 {
1396         XEvent ev;
1397         /* main event loop */
1398         XSync(dpy, False);
1399         while (running && !XNextEvent(dpy, &ev))
1400                 if (handler[ev.type])
1401                         handler[ev.type](&ev); /* call handler */
1402 }
1403
1404 void
1405 scan(void)
1406 {
1407         unsigned int i, num;
1408         Window d1, d2, *wins = NULL;
1409         XWindowAttributes wa;
1410
1411         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1412                 for (i = 0; i < num; i++) {
1413                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1414                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1415                                 continue;
1416                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1417                                 manage(wins[i], &wa);
1418                 }
1419                 for (i = 0; i < num; i++) { /* now the transients */
1420                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1421                                 continue;
1422                         if (XGetTransientForHint(dpy, wins[i], &d1)
1423                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1424                                 manage(wins[i], &wa);
1425                 }
1426                 if (wins)
1427                         XFree(wins);
1428         }
1429 }
1430
1431 void
1432 sendmon(Client *c, Monitor *m)
1433 {
1434         if (c->mon == m)
1435                 return;
1436         unfocus(c, 1);
1437         detach(c);
1438         detachstack(c);
1439         c->mon = m;
1440         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1441         attach(c);
1442         attachstack(c);
1443         focus(NULL);
1444         arrange(NULL);
1445 }
1446
1447 void
1448 setclientstate(Client *c, long state)
1449 {
1450         long data[] = { state, None };
1451
1452         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1453                         PropModeReplace, (unsigned char *)data, 2);
1454 }
1455
1456 int
1457 sendevent(Client *c, Atom proto)
1458 {
1459         int n;
1460         Atom *protocols;
1461         int exists = 0;
1462         XEvent ev;
1463
1464         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1465                 while (!exists && n--)
1466                         exists = protocols[n] == proto;
1467                 XFree(protocols);
1468         }
1469         if (exists) {
1470                 ev.type = ClientMessage;
1471                 ev.xclient.window = c->win;
1472                 ev.xclient.message_type = wmatom[WMProtocols];
1473                 ev.xclient.format = 32;
1474                 ev.xclient.data.l[0] = proto;
1475                 ev.xclient.data.l[1] = CurrentTime;
1476                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1477         }
1478         return exists;
1479 }
1480
1481 void
1482 setfocus(Client *c)
1483 {
1484         if (!c->neverfocus) {
1485                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1486                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1487                                 XA_WINDOW, 32, PropModeReplace,
1488                                 (unsigned char *) &(c->win), 1);
1489         }
1490         sendevent(c, wmatom[WMTakeFocus]);
1491 }
1492
1493 void
1494 setfullscreen(Client *c, int fullscreen)
1495 {
1496         if (fullscreen && !c->isfullscreen) {
1497                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1498                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1499                 c->isfullscreen = 1;
1500                 c->oldstate = c->isfloating;
1501                 c->oldbw = c->bw;
1502                 c->bw = 0;
1503                 c->isfloating = 1;
1504                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1505                 XRaiseWindow(dpy, c->win);
1506         } else if (!fullscreen && c->isfullscreen){
1507                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1508                                 PropModeReplace, (unsigned char*)0, 0);
1509                 c->isfullscreen = 0;
1510                 c->isfloating = c->oldstate;
1511                 c->bw = c->oldbw;
1512                 c->x = c->oldx;
1513                 c->y = c->oldy;
1514                 c->w = c->oldw;
1515                 c->h = c->oldh;
1516                 resizeclient(c, c->x, c->y, c->w, c->h);
1517                 arrange(c->mon);
1518         }
1519 }
1520
1521 void
1522 setlayout(const Arg *arg)
1523 {
1524         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1525                 selmon->sellt ^= 1;
1526         if (arg && arg->v)
1527                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1528         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1529         if (selmon->sel)
1530                 arrange(selmon);
1531         else
1532                 drawbar(selmon);
1533 }
1534
1535 /* arg > 1.0 will set mfact absolutly */
1536 void
1537 setmfact(const Arg *arg)
1538 {
1539         float f;
1540
1541         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1542                 return;
1543         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1544         if (f < 0.1 || f > 0.9)
1545                 return;
1546         selmon->mfact = f;
1547         arrange(selmon);
1548 }
1549
1550 void
1551 setup(void)
1552 {
1553         int i;
1554         XSetWindowAttributes wa;
1555         Atom utf8string;
1556
1557         /* clean up any zombies immediately */
1558         sigchld(0);
1559
1560         /* init screen */
1561         screen = DefaultScreen(dpy);
1562         sw = DisplayWidth(dpy, screen);
1563         sh = DisplayHeight(dpy, screen);
1564         root = RootWindow(dpy, screen);
1565         drw = drw_create(dpy, screen, root, sw, sh);
1566         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1567                 die("no fonts could be loaded.");
1568         lrpad = drw->fonts->h;
1569         bh = drw->fonts->h + 2;
1570         updategeom();
1571         /* init atoms */
1572         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1573         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1574         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1575         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1576         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1577         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1578         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1579         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1580         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1581         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1582         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1583         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1584         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1585         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1586         /* init cursors */
1587         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1588         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1589         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1590         /* init appearance */
1591         scheme = ecalloc(LENGTH(colors), sizeof(Scm));
1592         for (i = 0; i < LENGTH(colors); i++)
1593                 scheme[i] = drw_scm_create(drw, colors[i], 3);
1594         /* init bars */
1595         updatebars();
1596         updatestatus();
1597         /* supporting window for NetWMCheck */
1598         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1599         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1600                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1601         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1602                 PropModeReplace, (unsigned char *) "dwm", 4);
1603         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1604                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1605         /* EWMH support per view */
1606         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1607                         PropModeReplace, (unsigned char *) netatom, NetLast);
1608         XDeleteProperty(dpy, root, netatom[NetClientList]);
1609         /* select for events */
1610         wa.cursor = cursor[CurNormal]->cursor;
1611         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1612                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1613         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1614         XSelectInput(dpy, root, wa.event_mask);
1615         grabkeys();
1616         focus(NULL);
1617 }
1618
1619 void
1620 showhide(Client *c)
1621 {
1622         if (!c)
1623                 return;
1624         if (ISVISIBLE(c)) {
1625                 /* show clients top down */
1626                 XMoveWindow(dpy, c->win, c->x, c->y);
1627                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1628                         resize(c, c->x, c->y, c->w, c->h, 0);
1629                 showhide(c->snext);
1630         } else {
1631                 /* hide clients bottom up */
1632                 showhide(c->snext);
1633                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1634         }
1635 }
1636
1637 void
1638 sigchld(int unused)
1639 {
1640         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1641                 die("can't install SIGCHLD handler:");
1642         while (0 < waitpid(-1, NULL, WNOHANG));
1643 }
1644
1645 void
1646 spawn(const Arg *arg)
1647 {
1648         if (arg->v == dmenucmd)
1649                 dmenumon[0] = '0' + selmon->num;
1650         if (fork() == 0) {
1651                 if (dpy)
1652                         close(ConnectionNumber(dpy));
1653                 setsid();
1654                 execvp(((char **)arg->v)[0], (char **)arg->v);
1655                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1656                 perror(" failed");
1657                 exit(EXIT_SUCCESS);
1658         }
1659 }
1660
1661 void
1662 tag(const Arg *arg)
1663 {
1664         if (selmon->sel && arg->ui & TAGMASK) {
1665                 selmon->sel->tags = arg->ui & TAGMASK;
1666                 focus(NULL);
1667                 arrange(selmon);
1668         }
1669 }
1670
1671 void
1672 tagmon(const Arg *arg)
1673 {
1674         if (!selmon->sel || !mons->next)
1675                 return;
1676         sendmon(selmon->sel, dirtomon(arg->i));
1677 }
1678
1679 void
1680 tile(Monitor *m)
1681 {
1682         unsigned int i, n, h, mw, my, ty;
1683         Client *c;
1684
1685         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1686         if (n == 0)
1687                 return;
1688
1689         if (n > m->nmaster)
1690                 mw = m->nmaster ? m->ww * m->mfact : 0;
1691         else
1692                 mw = m->ww;
1693         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1694                 if (i < m->nmaster) {
1695                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1696                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1697                         my += HEIGHT(c);
1698                 } else {
1699                         h = (m->wh - ty) / (n - i);
1700                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1701                         ty += HEIGHT(c);
1702                 }
1703 }
1704
1705 void
1706 togglebar(const Arg *arg)
1707 {
1708         selmon->showbar = !selmon->showbar;
1709         updatebarpos(selmon);
1710         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1711         arrange(selmon);
1712 }
1713
1714 void
1715 togglefloating(const Arg *arg)
1716 {
1717         if (!selmon->sel)
1718                 return;
1719         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1720                 return;
1721         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1722         if (selmon->sel->isfloating)
1723                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1724                        selmon->sel->w, selmon->sel->h, 0);
1725         arrange(selmon);
1726 }
1727
1728 void
1729 toggletag(const Arg *arg)
1730 {
1731         unsigned int newtags;
1732
1733         if (!selmon->sel)
1734                 return;
1735         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1736         if (newtags) {
1737                 selmon->sel->tags = newtags;
1738                 focus(NULL);
1739                 arrange(selmon);
1740         }
1741 }
1742
1743 void
1744 toggleview(const Arg *arg)
1745 {
1746         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1747
1748         if (newtagset) {
1749                 selmon->tagset[selmon->seltags] = newtagset;
1750                 focus(NULL);
1751                 arrange(selmon);
1752         }
1753 }
1754
1755 void
1756 unfocus(Client *c, int setfocus)
1757 {
1758         if (!c)
1759                 return;
1760         grabbuttons(c, 0);
1761         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1762         if (setfocus) {
1763                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1764                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1765         }
1766 }
1767
1768 void
1769 unmanage(Client *c, int destroyed)
1770 {
1771         Monitor *m = c->mon;
1772         XWindowChanges wc;
1773
1774         /* The server grab construct avoids race conditions. */
1775         detach(c);
1776         detachstack(c);
1777         if (!destroyed) {
1778                 wc.border_width = c->oldbw;
1779                 XGrabServer(dpy);
1780                 XSetErrorHandler(xerrordummy);
1781                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1782                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1783                 setclientstate(c, WithdrawnState);
1784                 XSync(dpy, False);
1785                 XSetErrorHandler(xerror);
1786                 XUngrabServer(dpy);
1787         }
1788         free(c);
1789         focus(NULL);
1790         updateclientlist();
1791         arrange(m);
1792 }
1793
1794 void
1795 unmapnotify(XEvent *e)
1796 {
1797         Client *c;
1798         XUnmapEvent *ev = &e->xunmap;
1799
1800         if ((c = wintoclient(ev->window))) {
1801                 if (ev->send_event)
1802                         setclientstate(c, WithdrawnState);
1803                 else
1804                         unmanage(c, 0);
1805         }
1806 }
1807
1808 void
1809 updatebars(void)
1810 {
1811         Monitor *m;
1812         XSetWindowAttributes wa = {
1813                 .override_redirect = True,
1814                 .background_pixmap = ParentRelative,
1815                 .event_mask = ButtonPressMask|ExposureMask
1816         };
1817         for (m = mons; m; m = m->next) {
1818                 if (m->barwin)
1819                         continue;
1820                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1821                                           CopyFromParent, DefaultVisual(dpy, screen),
1822                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1823                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1824                 XMapRaised(dpy, m->barwin);
1825         }
1826 }
1827
1828 void
1829 updatebarpos(Monitor *m)
1830 {
1831         m->wy = m->my;
1832         m->wh = m->mh;
1833         if (m->showbar) {
1834                 m->wh -= bh;
1835                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1836                 m->wy = m->topbar ? m->wy + bh : m->wy;
1837         } else
1838                 m->by = -bh;
1839 }
1840
1841 void
1842 updateclientlist()
1843 {
1844         Client *c;
1845         Monitor *m;
1846
1847         XDeleteProperty(dpy, root, netatom[NetClientList]);
1848         for (m = mons; m; m = m->next)
1849                 for (c = m->clients; c; c = c->next)
1850                         XChangeProperty(dpy, root, netatom[NetClientList],
1851                                         XA_WINDOW, 32, PropModeAppend,
1852                                         (unsigned char *) &(c->win), 1);
1853 }
1854
1855 int
1856 updategeom(void)
1857 {
1858         int dirty = 0;
1859
1860 #ifdef XINERAMA
1861         if (XineramaIsActive(dpy)) {
1862                 int i, j, n, nn;
1863                 Client *c;
1864                 Monitor *m;
1865                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1866                 XineramaScreenInfo *unique = NULL;
1867
1868                 for (n = 0, m = mons; m; m = m->next, n++);
1869                 /* only consider unique geometries as separate screens */
1870                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1871                 for (i = 0, j = 0; i < nn; i++)
1872                         if (isuniquegeom(unique, j, &info[i]))
1873                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1874                 XFree(info);
1875                 nn = j;
1876                 if (n <= nn) {
1877                         for (i = 0; i < (nn - n); i++) { /* new monitors available */
1878                                 for (m = mons; m && m->next; m = m->next);
1879                                 if (m)
1880                                         m->next = createmon();
1881                                 else
1882                                         mons = createmon();
1883                         }
1884                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1885                                 if (i >= n
1886                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1887                                     || unique[i].width != m->mw || unique[i].height != m->mh))
1888                                 {
1889                                         dirty = 1;
1890                                         m->num = i;
1891                                         m->mx = m->wx = unique[i].x_org;
1892                                         m->my = m->wy = unique[i].y_org;
1893                                         m->mw = m->ww = unique[i].width;
1894                                         m->mh = m->wh = unique[i].height;
1895                                         updatebarpos(m);
1896                                 }
1897                 } else {
1898                         /* less monitors available nn < n */
1899                         for (i = nn; i < n; i++) {
1900                                 for (m = mons; m && m->next; m = m->next);
1901                                 while (m->clients) {
1902                                         dirty = 1;
1903                                         c = m->clients;
1904                                         m->clients = c->next;
1905                                         detachstack(c);
1906                                         c->mon = mons;
1907                                         attach(c);
1908                                         attachstack(c);
1909                                 }
1910                                 if (m == selmon)
1911                                         selmon = mons;
1912                                 cleanupmon(m);
1913                         }
1914                 }
1915                 free(unique);
1916         } else
1917 #endif /* XINERAMA */
1918         /* default monitor setup */
1919         {
1920                 if (!mons)
1921                         mons = createmon();
1922                 if (mons->mw != sw || mons->mh != sh) {
1923                         dirty = 1;
1924                         mons->mw = mons->ww = sw;
1925                         mons->mh = mons->wh = sh;
1926                         updatebarpos(mons);
1927                 }
1928         }
1929         if (dirty) {
1930                 selmon = mons;
1931                 selmon = wintomon(root);
1932         }
1933         return dirty;
1934 }
1935
1936 void
1937 updatenumlockmask(void)
1938 {
1939         unsigned int i, j;
1940         XModifierKeymap *modmap;
1941
1942         numlockmask = 0;
1943         modmap = XGetModifierMapping(dpy);
1944         for (i = 0; i < 8; i++)
1945                 for (j = 0; j < modmap->max_keypermod; j++)
1946                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1947                            == XKeysymToKeycode(dpy, XK_Num_Lock))
1948                                 numlockmask = (1 << i);
1949         XFreeModifiermap(modmap);
1950 }
1951
1952 void
1953 updatesizehints(Client *c)
1954 {
1955         long msize;
1956         XSizeHints size;
1957
1958         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1959                 /* size is uninitialized, ensure that size.flags aren't used */
1960                 size.flags = PSize;
1961         if (size.flags & PBaseSize) {
1962                 c->basew = size.base_width;
1963                 c->baseh = size.base_height;
1964         } else if (size.flags & PMinSize) {
1965                 c->basew = size.min_width;
1966                 c->baseh = size.min_height;
1967         } else
1968                 c->basew = c->baseh = 0;
1969         if (size.flags & PResizeInc) {
1970                 c->incw = size.width_inc;
1971                 c->inch = size.height_inc;
1972         } else
1973                 c->incw = c->inch = 0;
1974         if (size.flags & PMaxSize) {
1975                 c->maxw = size.max_width;
1976                 c->maxh = size.max_height;
1977         } else
1978                 c->maxw = c->maxh = 0;
1979         if (size.flags & PMinSize) {
1980                 c->minw = size.min_width;
1981                 c->minh = size.min_height;
1982         } else if (size.flags & PBaseSize) {
1983                 c->minw = size.base_width;
1984                 c->minh = size.base_height;
1985         } else
1986                 c->minw = c->minh = 0;
1987         if (size.flags & PAspect) {
1988                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1989                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1990         } else
1991                 c->maxa = c->mina = 0.0;
1992         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1993                      && c->maxw == c->minw && c->maxh == c->minh);
1994 }
1995
1996 void
1997 updatetitle(Client *c)
1998 {
1999         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2000                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2001         if (c->name[0] == '\0') /* hack to mark broken clients */
2002                 strcpy(c->name, broken);
2003 }
2004
2005 void
2006 updatestatus(void)
2007 {
2008         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2009                 strcpy(stext, "dwm-"VERSION);
2010         drawbar(selmon);
2011 }
2012
2013 void
2014 updatewindowtype(Client *c)
2015 {
2016         Atom state = getatomprop(c, netatom[NetWMState]);
2017         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2018
2019         if (state == netatom[NetWMFullscreen])
2020                 setfullscreen(c, 1);
2021         if (wtype == netatom[NetWMWindowTypeDialog])
2022                 c->isfloating = 1;
2023 }
2024
2025 void
2026 updatewmhints(Client *c)
2027 {
2028         XWMHints *wmh;
2029
2030         if ((wmh = XGetWMHints(dpy, c->win))) {
2031                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2032                         wmh->flags &= ~XUrgencyHint;
2033                         XSetWMHints(dpy, c->win, wmh);
2034                 } else
2035                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2036                 if (wmh->flags & InputHint)
2037                         c->neverfocus = !wmh->input;
2038                 else
2039                         c->neverfocus = 0;
2040                 XFree(wmh);
2041         }
2042 }
2043
2044 void
2045 view(const Arg *arg)
2046 {
2047         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2048                 return;
2049         selmon->seltags ^= 1; /* toggle sel tagset */
2050         if (arg->ui & TAGMASK)
2051                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2052         focus(NULL);
2053         arrange(selmon);
2054 }
2055
2056 Client *
2057 wintoclient(Window w)
2058 {
2059         Client *c;
2060         Monitor *m;
2061
2062         for (m = mons; m; m = m->next)
2063                 for (c = m->clients; c; c = c->next)
2064                         if (c->win == w)
2065                                 return c;
2066         return NULL;
2067 }
2068
2069 Monitor *
2070 wintomon(Window w)
2071 {
2072         int x, y;
2073         Client *c;
2074         Monitor *m;
2075
2076         if (w == root && getrootptr(&x, &y))
2077                 return recttomon(x, y, 1, 1);
2078         for (m = mons; m; m = m->next)
2079                 if (w == m->barwin)
2080                         return m;
2081         if ((c = wintoclient(w)))
2082                 return c->mon;
2083         return selmon;
2084 }
2085
2086 /* There's no way to check accesses to destroyed windows, thus those cases are
2087  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2088  * default error handler, which may call exit.  */
2089 int
2090 xerror(Display *dpy, XErrorEvent *ee)
2091 {
2092         if (ee->error_code == BadWindow
2093         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2094         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2095         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2096         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2097         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2098         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2099         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2100         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2101                 return 0;
2102         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2103                         ee->request_code, ee->error_code);
2104         return xerrorxlib(dpy, ee); /* may call exit */
2105 }
2106
2107 int
2108 xerrordummy(Display *dpy, XErrorEvent *ee)
2109 {
2110         return 0;
2111 }
2112
2113 /* Startup Error handler to check if another window manager
2114  * is already running. */
2115 int
2116 xerrorstart(Display *dpy, XErrorEvent *ee)
2117 {
2118         die("dwm: another window manager is already running");
2119         return -1;
2120 }
2121
2122 void
2123 zoom(const Arg *arg)
2124 {
2125         Client *c = selmon->sel;
2126
2127         if (!selmon->lt[selmon->sellt]->arrange
2128         || (selmon->sel && selmon->sel->isfloating))
2129                 return;
2130         if (c == nexttiled(selmon->clients))
2131                 if (!c || !(c = nexttiled(c->next)))
2132                         return;
2133         pop(c);
2134 }
2135
2136 int
2137 main(int argc, char *argv[])
2138 {
2139         if (argc == 2 && !strcmp("-v", argv[1]))
2140                 die("dwm-"VERSION);
2141         else if (argc != 1)
2142                 die("usage: dwm [-v]");
2143         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2144                 fputs("warning: no locale support\n", stderr);
2145         if (!(dpy = XOpenDisplay(NULL)))
2146                 die("dwm: cannot open display");
2147         checkotherwm();
2148         setup();
2149         scan();
2150         run();
2151         cleanup();
2152         XCloseDisplay(dpy);
2153         return EXIT_SUCCESS;
2154 }