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 MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  54 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  55 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  56 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  57 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
  58
  59 /* enums */
  60 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  61 enum { SchemeNorm, SchemeSel }; /* color schemes */
  62 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  63        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  64        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  65 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  66 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  67        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  68
  69 typedef union {
  70         int i;
  71         unsigned int ui;
  72         float f;
  73         const void *v;
  74 } Arg;
  75
  76 typedef struct {
  77         unsigned int click;
  78         unsigned int mask;
  79         unsigned int button;
  80         void (*func)(const Arg *arg);
  81         const Arg arg;
  82 } Button;
  83
  84 typedef struct Monitor Monitor;
  85 typedef struct Client Client;
  86 struct Client {
  87         char name[256];
  88         float mina, maxa;
  89         int x, y, w, h;
  90         int oldx, oldy, oldw, oldh;
  91         int basew, baseh, incw, inch, maxw, maxh, minw, minh, hintsvalid;
  92         int bw, oldbw;
  93         unsigned int tags;
  94         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  95         Client *next;
  96         Client *snext;
  97         Monitor *mon;
  98         Window win;
  99 };
 100
 101 typedef struct {
 102         unsigned int mod;
 103         KeySym keysym;
 104         void (*func)(const Arg *);
 105         const Arg arg;
 106 } Key;
 107
 108 typedef struct {
 109         const char *symbol;
 110         void (*arrange)(Monitor *);
 111 } Layout;
 112
 113 struct Monitor {
 114         char ltsymbol[16];
 115         float mfact;
 116         int nmaster;
 117         int num;
 118         int by;               /* bar geometry */
 119         int mx, my, mw, mh;   /* screen size */
 120         int wx, wy, ww, wh;   /* window area  */
 121         unsigned int seltags;
 122         unsigned int sellt;
 123         unsigned int tagset[2];
 124         int showbar;
 125         int topbar;
 126         Client *clients;
 127         Client *sel;
 128         Client *stack;
 129         Monitor *next;
 130         Window barwin;
 131         const Layout *lt[2];
 132 };
 133
 134 typedef struct {
 135         const char *class;
 136         const char *instance;
 137         const char *title;
 138         unsigned int tags;
 139         int isfloating;
 140         int monitor;
 141 } Rule;
 142
 143 /* function declarations */
 144 static void applyrules(Client *c);
 145 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 146 static void arrange(Monitor *m);
 147 static void arrangemon(Monitor *m);
 148 static void attach(Client *c);
 149 static void attachstack(Client *c);
 150 static void buttonpress(XEvent *e);
 151 static void checkotherwm(void);
 152 static void cleanup(void);
 153 static void cleanupmon(Monitor *mon);
 154 static void clientmessage(XEvent *e);
 155 static void configure(Client *c);
 156 static void configurenotify(XEvent *e);
 157 static void configurerequest(XEvent *e);
 158 static Monitor *createmon(void);
 159 static void destroynotify(XEvent *e);
 160 static void detach(Client *c);
 161 static void detachstack(Client *c);
 162 static Monitor *dirtomon(int dir);
 163 static void drawbar(Monitor *m);
 164 static void drawbars(void);
 165 static void enternotify(XEvent *e);
 166 static void expose(XEvent *e);
 167 static void focus(Client *c);
 168 static void focusin(XEvent *e);
 169 static void focusmon(const Arg *arg);
 170 static void focusstack(const Arg *arg);
 171 static Atom getatomprop(Client *c, Atom prop);
 172 static int getrootptr(int *x, int *y);
 173 static long getstate(Window w);
 174 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 175 static void grabbuttons(Client *c, int focused);
 176 static void grabkeys(void);
 177 static void incnmaster(const Arg *arg);
 178 static void keypress(XEvent *e);
 179 static void killclient(const Arg *arg);
 180 static void manage(Window w, XWindowAttributes *wa);
 181 static void mappingnotify(XEvent *e);
 182 static void maprequest(XEvent *e);
 183 static void monocle(Monitor *m);
 184 static void motionnotify(XEvent *e);
 185 static void movemouse(const Arg *arg);
 186 static Client *nexttiled(Client *c);
 187 static void pop(Client *c);
 188 static void propertynotify(XEvent *e);
 189 static void quit(const Arg *arg);
 190 static Monitor *recttomon(int x, int y, int w, int h);
 191 static void resize(Client *c, int x, int y, int w, int h, int interact);
 192 static void resizeclient(Client *c, int x, int y, int w, int h);
 193 static void resizemouse(const Arg *arg);
 194 static void restack(Monitor *m);
 195 static void run(void);
 196 static void scan(void);
 197 static int sendevent(Client *c, Atom proto);
 198 static void sendmon(Client *c, Monitor *m);
 199 static void setclientstate(Client *c, long state);
 200 static void setfocus(Client *c);
 201 static void setfullscreen(Client *c, int fullscreen);
 202 static void setlayout(const Arg *arg);
 203 static void setmfact(const Arg *arg);
 204 static void setup(void);
 205 static void seturgent(Client *c, int urg);
 206 static void showhide(Client *c);
 207 static void spawn(const Arg *arg);
 208 static void tag(const Arg *arg);
 209 static void tagmon(const Arg *arg);
 210 static void tile(Monitor *m);
 211 static void togglebar(const Arg *arg);
 212 static void togglefloating(const Arg *arg);
 213 static void toggletag(const Arg *arg);
 214 static void toggleview(const Arg *arg);
 215 static void unfocus(Client *c, int setfocus);
 216 static void unmanage(Client *c, int destroyed);
 217 static void unmapnotify(XEvent *e);
 218 static void updatebarpos(Monitor *m);
 219 static void updatebars(void);
 220 static void updateclientlist(void);
 221 static int updategeom(void);
 222 static void updatenumlockmask(void);
 223 static void updatesizehints(Client *c);
 224 static void updatestatus(void);
 225 static void updatetitle(Client *c);
 226 static void updatewindowtype(Client *c);
 227 static void updatewmhints(Client *c);
 228 static void view(const Arg *arg);
 229 static Client *wintoclient(Window w);
 230 static Monitor *wintomon(Window w);
 231 static int xerror(Display *dpy, XErrorEvent *ee);
 232 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 233 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 234 static void zoom(const Arg *arg);
 235
 236 /* variables */
 237 static const char broken[] = "broken";
 238 static char stext[256];
 239 static int screen;
 240 static int sw, sh;           /* X display screen geometry width, height */
 241 static int bh;               /* bar height */
 242 static int lrpad;            /* sum of left and right padding for text */
 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 Clr **scheme;
 265 static Display *dpy;
 266 static Drw *drw;
 267 static Monitor *mons, *selmon;
 268 static Window root, wmcheckwin;
 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                 if (!c->hintsvalid)
 347                         updatesizehints(c);
 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 + TEXTW(selmon->ltsymbol))
 442                         click = ClkLtSymbol;
 443                 else if (ev->x > selmon->ww - (int)TEXTW(stext))
 444                         click = ClkStatusText;
 445                 else
 446                         click = ClkWinTitle;
 447         } else if ((c = wintoclient(ev->window))) {
 448                 focus(c);
 449                 restack(selmon);
 450                 XAllowEvents(dpy, ReplayPointer, CurrentTime);
 451                 click = ClkClientWin;
 452         }
 453         for (i = 0; i < LENGTH(buttons); i++)
 454                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 455                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 456                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 457 }
 458
 459 void
 460 checkotherwm(void)
 461 {
 462         xerrorxlib = XSetErrorHandler(xerrorstart);
 463         /* this causes an error if some other window manager is running */
 464         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 465         XSync(dpy, False);
 466         XSetErrorHandler(xerror);
 467         XSync(dpy, False);
 468 }
 469
 470 void
 471 cleanup(void)
 472 {
 473         Arg a = {.ui = ~0};
 474         Layout foo = { "", NULL };
 475         Monitor *m;
 476         size_t i;
 477
 478         view(&a);
 479         selmon->lt[selmon->sellt] = &foo;
 480         for (m = mons; m; m = m->next)
 481                 while (m->stack)
 482                         unmanage(m->stack, 0);
 483         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 484         while (mons)
 485                 cleanupmon(mons);
 486         for (i = 0; i < CurLast; i++)
 487                 drw_cur_free(drw, cursor[i]);
 488         for (i = 0; i < LENGTH(colors); i++)
 489                 free(scheme[i]);
 490         free(scheme);
 491         XDestroyWindow(dpy, wmcheckwin);
 492         drw_free(drw);
 493         XSync(dpy, False);
 494         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 495         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 496 }
 497
 498 void
 499 cleanupmon(Monitor *mon)
 500 {
 501         Monitor *m;
 502
 503         if (mon == mons)
 504                 mons = mons->next;
 505         else {
 506                 for (m = mons; m && m->next != mon; m = m->next);
 507                 m->next = mon->next;
 508         }
 509         XUnmapWindow(dpy, mon->barwin);
 510         XDestroyWindow(dpy, mon->barwin);
 511         free(mon);
 512 }
 513
 514 void
 515 clientmessage(XEvent *e)
 516 {
 517         XClientMessageEvent *cme = &e->xclient;
 518         Client *c = wintoclient(cme->window);
 519
 520         if (!c)
 521                 return;
 522         if (cme->message_type == netatom[NetWMState]) {
 523                 if (cme->data.l[1] == netatom[NetWMFullscreen]
 524                 || cme->data.l[2] == netatom[NetWMFullscreen])
 525                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 526                                 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 527         } else if (cme->message_type == netatom[NetActiveWindow]) {
 528                 if (c != selmon->sel && !c->isurgent)
 529                         seturgent(c, 1);
 530         }
 531 }
 532
 533 void
 534 configure(Client *c)
 535 {
 536         XConfigureEvent ce;
 537
 538         ce.type = ConfigureNotify;
 539         ce.display = dpy;
 540         ce.event = c->win;
 541         ce.window = c->win;
 542         ce.x = c->x;
 543         ce.y = c->y;
 544         ce.width = c->w;
 545         ce.height = c->h;
 546         ce.border_width = c->bw;
 547         ce.above = None;
 548         ce.override_redirect = False;
 549         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 550 }
 551
 552 void
 553 configurenotify(XEvent *e)
 554 {
 555         Monitor *m;
 556         Client *c;
 557         XConfigureEvent *ev = &e->xconfigure;
 558         int dirty;
 559
 560         /* TODO: updategeom handling sucks, needs to be simplified */
 561         if (ev->window == root) {
 562                 dirty = (sw != ev->width || sh != ev->height);
 563                 sw = ev->width;
 564                 sh = ev->height;
 565                 if (updategeom() || dirty) {
 566                         drw_resize(drw, sw, bh);
 567                         updatebars();
 568                         for (m = mons; m; m = m->next) {
 569                                 for (c = m->clients; c; c = c->next)
 570                                         if (c->isfullscreen)
 571                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 572                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 573                         }
 574                         focus(NULL);
 575                         arrange(NULL);
 576                 }
 577         }
 578 }
 579
 580 void
 581 configurerequest(XEvent *e)
 582 {
 583         Client *c;
 584         Monitor *m;
 585         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 586         XWindowChanges wc;
 587
 588         if ((c = wintoclient(ev->window))) {
 589                 if (ev->value_mask & CWBorderWidth)
 590                         c->bw = ev->border_width;
 591                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 592                         m = c->mon;
 593                         if (ev->value_mask & CWX) {
 594                                 c->oldx = c->x;
 595                                 c->x = m->mx + ev->x;
 596                         }
 597                         if (ev->value_mask & CWY) {
 598                                 c->oldy = c->y;
 599                                 c->y = m->my + ev->y;
 600                         }
 601                         if (ev->value_mask & CWWidth) {
 602                                 c->oldw = c->w;
 603                                 c->w = ev->width;
 604                         }
 605                         if (ev->value_mask & CWHeight) {
 606                                 c->oldh = c->h;
 607                                 c->h = ev->height;
 608                         }
 609                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 610                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 611                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 612                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 613                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 614                                 configure(c);
 615                         if (ISVISIBLE(c))
 616                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 617                 } else
 618                         configure(c);
 619         } else {
 620                 wc.x = ev->x;
 621                 wc.y = ev->y;
 622                 wc.width = ev->width;
 623                 wc.height = ev->height;
 624                 wc.border_width = ev->border_width;
 625                 wc.sibling = ev->above;
 626                 wc.stack_mode = ev->detail;
 627                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 628         }
 629         XSync(dpy, False);
 630 }
 631
 632 Monitor *
 633 createmon(void)
 634 {
 635         Monitor *m;
 636
 637         m = ecalloc(1, sizeof(Monitor));
 638         m->tagset[0] = m->tagset[1] = 1;
 639         m->mfact = mfact;
 640         m->nmaster = nmaster;
 641         m->showbar = showbar;
 642         m->topbar = topbar;
 643         m->lt[0] = &layouts[0];
 644         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 645         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 646         return m;
 647 }
 648
 649 void
 650 destroynotify(XEvent *e)
 651 {
 652         Client *c;
 653         XDestroyWindowEvent *ev = &e->xdestroywindow;
 654
 655         if ((c = wintoclient(ev->window)))
 656                 unmanage(c, 1);
 657 }
 658
 659 void
 660 detach(Client *c)
 661 {
 662         Client **tc;
 663
 664         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 665         *tc = c->next;
 666 }
 667
 668 void
 669 detachstack(Client *c)
 670 {
 671         Client **tc, *t;
 672
 673         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 674         *tc = c->snext;
 675
 676         if (c == c->mon->sel) {
 677                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 678                 c->mon->sel = t;
 679         }
 680 }
 681
 682 Monitor *
 683 dirtomon(int dir)
 684 {
 685         Monitor *m = NULL;
 686
 687         if (dir > 0) {
 688                 if (!(m = selmon->next))
 689                         m = mons;
 690         } else if (selmon == mons)
 691                 for (m = mons; m->next; m = m->next);
 692         else
 693                 for (m = mons; m->next != selmon; m = m->next);
 694         return m;
 695 }
 696
 697 void
 698 drawbar(Monitor *m)
 699 {
 700         int x, w, tw = 0;
 701         int boxs = drw->fonts->h / 9;
 702         int boxw = drw->fonts->h / 6 + 2;
 703         unsigned int i, occ = 0, urg = 0;
 704         Client *c;
 705
 706         if (!m->showbar)
 707                 return;
 708
 709         /* draw status first so it can be overdrawn by tags later */
 710         if (m == selmon) { /* status is only drawn on selected monitor */
 711                 drw_setscheme(drw, scheme[SchemeNorm]);
 712                 tw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 713                 drw_text(drw, m->ww - tw, 0, tw, bh, 0, stext, 0);
 714         }
 715
 716         for (c = m->clients; c; c = c->next) {
 717                 occ |= c->tags;
 718                 if (c->isurgent)
 719                         urg |= c->tags;
 720         }
 721         x = 0;
 722         for (i = 0; i < LENGTH(tags); i++) {
 723                 w = TEXTW(tags[i]);
 724                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 725                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 726                 if (occ & 1 << i)
 727                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 728                                 m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 729                                 urg & 1 << i);
 730                 x += w;
 731         }
 732         w = TEXTW(m->ltsymbol);
 733         drw_setscheme(drw, scheme[SchemeNorm]);
 734         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 735
 736         if ((w = m->ww - tw - x) > bh) {
 737                 if (m->sel) {
 738                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 739                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 740                         if (m->sel->isfloating)
 741                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 742                 } else {
 743                         drw_setscheme(drw, scheme[SchemeNorm]);
 744                         drw_rect(drw, x, 0, w, bh, 1, 1);
 745                 }
 746         }
 747         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 748 }
 749
 750 void
 751 drawbars(void)
 752 {
 753         Monitor *m;
 754
 755         for (m = mons; m; m = m->next)
 756                 drawbar(m);
 757 }
 758
 759 void
 760 enternotify(XEvent *e)
 761 {
 762         Client *c;
 763         Monitor *m;
 764         XCrossingEvent *ev = &e->xcrossing;
 765
 766         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 767                 return;
 768         c = wintoclient(ev->window);
 769         m = c ? c->mon : wintomon(ev->window);
 770         if (m != selmon) {
 771                 unfocus(selmon->sel, 1);
 772                 selmon = m;
 773         } else if (!c || c == selmon->sel)
 774                 return;
 775         focus(c);
 776 }
 777
 778 void
 779 expose(XEvent *e)
 780 {
 781         Monitor *m;
 782         XExposeEvent *ev = &e->xexpose;
 783
 784         if (ev->count == 0 && (m = wintomon(ev->window)))
 785                 drawbar(m);
 786 }
 787
 788 void
 789 focus(Client *c)
 790 {
 791         if (!c || !ISVISIBLE(c))
 792                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 793         if (selmon->sel && selmon->sel != c)
 794                 unfocus(selmon->sel, 0);
 795         if (c) {
 796                 if (c->mon != selmon)
 797                         selmon = c->mon;
 798                 if (c->isurgent)
 799                         seturgent(c, 0);
 800                 detachstack(c);
 801                 attachstack(c);
 802                 grabbuttons(c, 1);
 803                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 804                 setfocus(c);
 805         } else {
 806                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 807                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 808         }
 809         selmon->sel = c;
 810         drawbars();
 811 }
 812
 813 /* there are some broken focus acquiring clients needing extra handling */
 814 void
 815 focusin(XEvent *e)
 816 {
 817         XFocusChangeEvent *ev = &e->xfocus;
 818
 819         if (selmon->sel && ev->window != selmon->sel->win)
 820                 setfocus(selmon->sel);
 821 }
 822
 823 void
 824 focusmon(const Arg *arg)
 825 {
 826         Monitor *m;
 827
 828         if (!mons->next)
 829                 return;
 830         if ((m = dirtomon(arg->i)) == selmon)
 831                 return;
 832         unfocus(selmon->sel, 0);
 833         selmon = m;
 834         focus(NULL);
 835 }
 836
 837 void
 838 focusstack(const Arg *arg)
 839 {
 840         Client *c = NULL, *i;
 841
 842         if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
 843                 return;
 844         if (arg->i > 0) {
 845                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 846                 if (!c)
 847                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 848         } else {
 849                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 850                         if (ISVISIBLE(i))
 851                                 c = i;
 852                 if (!c)
 853                         for (; i; i = i->next)
 854                                 if (ISVISIBLE(i))
 855                                         c = i;
 856         }
 857         if (c) {
 858                 focus(c);
 859                 restack(selmon);
 860         }
 861 }
 862
 863 Atom
 864 getatomprop(Client *c, Atom prop)
 865 {
 866         int di;
 867         unsigned long dl;
 868         unsigned char *p = NULL;
 869         Atom da, atom = None;
 870
 871         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 872                 &da, &di, &dl, &dl, &p) == Success && p) {
 873                 atom = *(Atom *)p;
 874                 XFree(p);
 875         }
 876         return atom;
 877 }
 878
 879 int
 880 getrootptr(int *x, int *y)
 881 {
 882         int di;
 883         unsigned int dui;
 884         Window dummy;
 885
 886         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 887 }
 888
 889 long
 890 getstate(Window w)
 891 {
 892         int format;
 893         long result = -1;
 894         unsigned char *p = NULL;
 895         unsigned long n, extra;
 896         Atom real;
 897
 898         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 899                 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 900                 return -1;
 901         if (n != 0)
 902                 result = *p;
 903         XFree(p);
 904         return result;
 905 }
 906
 907 int
 908 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 909 {
 910         char **list = NULL;
 911         int n;
 912         XTextProperty name;
 913
 914         if (!text || size == 0)
 915                 return 0;
 916         text[0] = '\0';
 917         if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
 918                 return 0;
 919         if (name.encoding == XA_STRING) {
 920                 strncpy(text, (char *)name.value, size - 1);
 921         } else if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 922                 strncpy(text, *list, size - 1);
 923                 XFreeStringList(list);
 924         }
 925         text[size - 1] = '\0';
 926         XFree(name.value);
 927         return 1;
 928 }
 929
 930 void
 931 grabbuttons(Client *c, int focused)
 932 {
 933         updatenumlockmask();
 934         {
 935                 unsigned int i, j;
 936                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 937                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 938                 if (!focused)
 939                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 940                                 BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
 941                 for (i = 0; i < LENGTH(buttons); i++)
 942                         if (buttons[i].click == ClkClientWin)
 943                                 for (j = 0; j < LENGTH(modifiers); j++)
 944                                         XGrabButton(dpy, buttons[i].button,
 945                                                 buttons[i].mask | modifiers[j],
 946                                                 c->win, False, BUTTONMASK,
 947                                                 GrabModeAsync, GrabModeSync, None, None);
 948         }
 949 }
 950
 951 void
 952 grabkeys(void)
 953 {
 954         updatenumlockmask();
 955         {
 956                 unsigned int i, j, k;
 957                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 958                 int start, end, skip;
 959                 KeySym *syms;
 960
 961                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 962                 XDisplayKeycodes(dpy, &start, &end);
 963                 syms = XGetKeyboardMapping(dpy, start, end - start + 1, &skip);
 964                 if (!syms)
 965                         return;
 966                 for (k = start; k <= end; k++)
 967                         for (i = 0; i < LENGTH(keys); i++)
 968                                 /* skip modifier codes, we do that ourselves */
 969                                 if (keys[i].keysym == syms[(k - start) * skip])
 970                                         for (j = 0; j < LENGTH(modifiers); j++)
 971                                                 XGrabKey(dpy, k,
 972                                                          keys[i].mod | modifiers[j],
 973                                                          root, True,
 974                                                          GrabModeAsync, GrabModeAsync);
 975                 XFree(syms);
 976         }
 977 }
 978
 979 void
 980 incnmaster(const Arg *arg)
 981 {
 982         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 983         arrange(selmon);
 984 }
 985
 986 #ifdef XINERAMA
 987 static int
 988 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 989 {
 990         while (n--)
 991                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 992                 && unique[n].width == info->width && unique[n].height == info->height)
 993                         return 0;
 994         return 1;
 995 }
 996 #endif /* XINERAMA */
 997
 998 void
 999 keypress(XEvent *e)
1000 {
1001         unsigned int i;
1002         KeySym keysym;
1003         XKeyEvent *ev;
1004
1005         ev = &e->xkey;
1006         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1007         for (i = 0; i < LENGTH(keys); i++)
1008                 if (keysym == keys[i].keysym
1009                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1010                 && keys[i].func)
1011                         keys[i].func(&(keys[i].arg));
1012 }
1013
1014 void
1015 killclient(const Arg *arg)
1016 {
1017         if (!selmon->sel)
1018                 return;
1019         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1020                 XGrabServer(dpy);
1021                 XSetErrorHandler(xerrordummy);
1022                 XSetCloseDownMode(dpy, DestroyAll);
1023                 XKillClient(dpy, selmon->sel->win);
1024                 XSync(dpy, False);
1025                 XSetErrorHandler(xerror);
1026                 XUngrabServer(dpy);
1027         }
1028 }
1029
1030 void
1031 manage(Window w, XWindowAttributes *wa)
1032 {
1033         Client *c, *t = NULL;
1034         Window trans = None;
1035         XWindowChanges wc;
1036
1037         c = ecalloc(1, sizeof(Client));
1038         c->win = w;
1039         /* geometry */
1040         c->x = c->oldx = wa->x;
1041         c->y = c->oldy = wa->y;
1042         c->w = c->oldw = wa->width;
1043         c->h = c->oldh = wa->height;
1044         c->oldbw = wa->border_width;
1045
1046         updatetitle(c);
1047         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1048                 c->mon = t->mon;
1049                 c->tags = t->tags;
1050         } else {
1051                 c->mon = selmon;
1052                 applyrules(c);
1053         }
1054
1055         if (c->x + WIDTH(c) > c->mon->wx + c->mon->ww)
1056                 c->x = c->mon->wx + c->mon->ww - WIDTH(c);
1057         if (c->y + HEIGHT(c) > c->mon->wy + c->mon->wh)
1058                 c->y = c->mon->wy + c->mon->wh - HEIGHT(c);
1059         c->x = MAX(c->x, c->mon->wx);
1060         c->y = MAX(c->y, c->mon->wy);
1061         c->bw = borderpx;
1062
1063         wc.border_width = c->bw;
1064         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1065         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1066         configure(c); /* propagates border_width, if size doesn't change */
1067         updatewindowtype(c);
1068         updatesizehints(c);
1069         updatewmhints(c);
1070         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1071         grabbuttons(c, 0);
1072         if (!c->isfloating)
1073                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1074         if (c->isfloating)
1075                 XRaiseWindow(dpy, c->win);
1076         attach(c);
1077         attachstack(c);
1078         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1079                 (unsigned char *) &(c->win), 1);
1080         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1081         setclientstate(c, NormalState);
1082         if (c->mon == selmon)
1083                 unfocus(selmon->sel, 0);
1084         c->mon->sel = c;
1085         arrange(c->mon);
1086         XMapWindow(dpy, c->win);
1087         focus(NULL);
1088 }
1089
1090 void
1091 mappingnotify(XEvent *e)
1092 {
1093         XMappingEvent *ev = &e->xmapping;
1094
1095         XRefreshKeyboardMapping(ev);
1096         if (ev->request == MappingKeyboard)
1097                 grabkeys();
1098 }
1099
1100 void
1101 maprequest(XEvent *e)
1102 {
1103         static XWindowAttributes wa;
1104         XMapRequestEvent *ev = &e->xmaprequest;
1105
1106         if (!XGetWindowAttributes(dpy, ev->window, &wa) || wa.override_redirect)
1107                 return;
1108         if (!wintoclient(ev->window))
1109                 manage(ev->window, &wa);
1110 }
1111
1112 void
1113 monocle(Monitor *m)
1114 {
1115         unsigned int n = 0;
1116         Client *c;
1117
1118         for (c = m->clients; c; c = c->next)
1119                 if (ISVISIBLE(c))
1120                         n++;
1121         if (n > 0) /* override layout symbol */
1122                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1123         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1124                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1125 }
1126
1127 void
1128 motionnotify(XEvent *e)
1129 {
1130         static Monitor *mon = NULL;
1131         Monitor *m;
1132         XMotionEvent *ev = &e->xmotion;
1133
1134         if (ev->window != root)
1135                 return;
1136         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1137                 unfocus(selmon->sel, 1);
1138                 selmon = m;
1139                 focus(NULL);
1140         }
1141         mon = m;
1142 }
1143
1144 void
1145 movemouse(const Arg *arg)
1146 {
1147         int x, y, ocx, ocy, nx, ny;
1148         Client *c;
1149         Monitor *m;
1150         XEvent ev;
1151         Time lasttime = 0;
1152
1153         if (!(c = selmon->sel))
1154                 return;
1155         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1156                 return;
1157         restack(selmon);
1158         ocx = c->x;
1159         ocy = c->y;
1160         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1161                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1162                 return;
1163         if (!getrootptr(&x, &y))
1164                 return;
1165         do {
1166                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1167                 switch(ev.type) {
1168                 case ConfigureRequest:
1169                 case Expose:
1170                 case MapRequest:
1171                         handler[ev.type](&ev);
1172                         break;
1173                 case MotionNotify:
1174                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1175                                 continue;
1176                         lasttime = ev.xmotion.time;
1177
1178                         nx = ocx + (ev.xmotion.x - x);
1179                         ny = ocy + (ev.xmotion.y - y);
1180                         if (abs(selmon->wx - nx) < snap)
1181                                 nx = selmon->wx;
1182                         else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1183                                 nx = selmon->wx + selmon->ww - WIDTH(c);
1184                         if (abs(selmon->wy - ny) < snap)
1185                                 ny = selmon->wy;
1186                         else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1187                                 ny = selmon->wy + selmon->wh - HEIGHT(c);
1188                         if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1189                         && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1190                                 togglefloating(NULL);
1191                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1192                                 resize(c, nx, ny, c->w, c->h, 1);
1193                         break;
1194                 }
1195         } while (ev.type != ButtonRelease);
1196         XUngrabPointer(dpy, CurrentTime);
1197         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1198                 sendmon(c, m);
1199                 selmon = m;
1200                 focus(NULL);
1201         }
1202 }
1203
1204 Client *
1205 nexttiled(Client *c)
1206 {
1207         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1208         return c;
1209 }
1210
1211 void
1212 pop(Client *c)
1213 {
1214         detach(c);
1215         attach(c);
1216         focus(c);
1217         arrange(c->mon);
1218 }
1219
1220 void
1221 propertynotify(XEvent *e)
1222 {
1223         Client *c;
1224         Window trans;
1225         XPropertyEvent *ev = &e->xproperty;
1226
1227         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1228                 updatestatus();
1229         else if (ev->state == PropertyDelete)
1230                 return; /* ignore */
1231         else if ((c = wintoclient(ev->window))) {
1232                 switch(ev->atom) {
1233                 default: break;
1234                 case XA_WM_TRANSIENT_FOR:
1235                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1236                                 (c->isfloating = (wintoclient(trans)) != NULL))
1237                                 arrange(c->mon);
1238                         break;
1239                 case XA_WM_NORMAL_HINTS:
1240                         c->hintsvalid = 0;
1241                         break;
1242                 case XA_WM_HINTS:
1243                         updatewmhints(c);
1244                         drawbars();
1245                         break;
1246                 }
1247                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1248                         updatetitle(c);
1249                         if (c == c->mon->sel)
1250                                 drawbar(c->mon);
1251                 }
1252                 if (ev->atom == netatom[NetWMWindowType])
1253                         updatewindowtype(c);
1254         }
1255 }
1256
1257 void
1258 quit(const Arg *arg)
1259 {
1260         running = 0;
1261 }
1262
1263 Monitor *
1264 recttomon(int x, int y, int w, int h)
1265 {
1266         Monitor *m, *r = selmon;
1267         int a, area = 0;
1268
1269         for (m = mons; m; m = m->next)
1270                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1271                         area = a;
1272                         r = m;
1273                 }
1274         return r;
1275 }
1276
1277 void
1278 resize(Client *c, int x, int y, int w, int h, int interact)
1279 {
1280         if (applysizehints(c, &x, &y, &w, &h, interact))
1281                 resizeclient(c, x, y, w, h);
1282 }
1283
1284 void
1285 resizeclient(Client *c, int x, int y, int w, int h)
1286 {
1287         XWindowChanges wc;
1288
1289         c->oldx = c->x; c->x = wc.x = x;
1290         c->oldy = c->y; c->y = wc.y = y;
1291         c->oldw = c->w; c->w = wc.width = w;
1292         c->oldh = c->h; c->h = wc.height = h;
1293         wc.border_width = c->bw;
1294         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1295         configure(c);
1296         XSync(dpy, False);
1297 }
1298
1299 void
1300 resizemouse(const Arg *arg)
1301 {
1302         int ocx, ocy, nw, nh;
1303         Client *c;
1304         Monitor *m;
1305         XEvent ev;
1306         Time lasttime = 0;
1307
1308         if (!(c = selmon->sel))
1309                 return;
1310         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1311                 return;
1312         restack(selmon);
1313         ocx = c->x;
1314         ocy = c->y;
1315         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1316                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1317                 return;
1318         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1319         do {
1320                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1321                 switch(ev.type) {
1322                 case ConfigureRequest:
1323                 case Expose:
1324                 case MapRequest:
1325                         handler[ev.type](&ev);
1326                         break;
1327                 case MotionNotify:
1328                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1329                                 continue;
1330                         lasttime = ev.xmotion.time;
1331
1332                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1333                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1334                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1335                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1336                         {
1337                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1338                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1339                                         togglefloating(NULL);
1340                         }
1341                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1342                                 resize(c, c->x, c->y, nw, nh, 1);
1343                         break;
1344                 }
1345         } while (ev.type != ButtonRelease);
1346         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1347         XUngrabPointer(dpy, CurrentTime);
1348         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1349         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1350                 sendmon(c, m);
1351                 selmon = m;
1352                 focus(NULL);
1353         }
1354 }
1355
1356 void
1357 restack(Monitor *m)
1358 {
1359         Client *c;
1360         XEvent ev;
1361         XWindowChanges wc;
1362
1363         drawbar(m);
1364         if (!m->sel)
1365                 return;
1366         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1367                 XRaiseWindow(dpy, m->sel->win);
1368         if (m->lt[m->sellt]->arrange) {
1369                 wc.stack_mode = Below;
1370                 wc.sibling = m->barwin;
1371                 for (c = m->stack; c; c = c->snext)
1372                         if (!c->isfloating && ISVISIBLE(c)) {
1373                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1374                                 wc.sibling = c->win;
1375                         }
1376         }
1377         XSync(dpy, False);
1378         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1379 }
1380
1381 void
1382 run(void)
1383 {
1384         XEvent ev;
1385         /* main event loop */
1386         XSync(dpy, False);
1387         while (running && !XNextEvent(dpy, &ev))
1388                 if (handler[ev.type])
1389                         handler[ev.type](&ev); /* call handler */
1390 }
1391
1392 void
1393 scan(void)
1394 {
1395         unsigned int i, num;
1396         Window d1, d2, *wins = NULL;
1397         XWindowAttributes wa;
1398
1399         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1400                 for (i = 0; i < num; i++) {
1401                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1402                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1403                                 continue;
1404                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1405                                 manage(wins[i], &wa);
1406                 }
1407                 for (i = 0; i < num; i++) { /* now the transients */
1408                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1409                                 continue;
1410                         if (XGetTransientForHint(dpy, wins[i], &d1)
1411                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1412                                 manage(wins[i], &wa);
1413                 }
1414                 if (wins)
1415                         XFree(wins);
1416         }
1417 }
1418
1419 void
1420 sendmon(Client *c, Monitor *m)
1421 {
1422         if (c->mon == m)
1423                 return;
1424         unfocus(c, 1);
1425         detach(c);
1426         detachstack(c);
1427         c->mon = m;
1428         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1429         attach(c);
1430         attachstack(c);
1431         focus(NULL);
1432         arrange(NULL);
1433 }
1434
1435 void
1436 setclientstate(Client *c, long state)
1437 {
1438         long data[] = { state, None };
1439
1440         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1441                 PropModeReplace, (unsigned char *)data, 2);
1442 }
1443
1444 int
1445 sendevent(Client *c, Atom proto)
1446 {
1447         int n;
1448         Atom *protocols;
1449         int exists = 0;
1450         XEvent ev;
1451
1452         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1453                 while (!exists && n--)
1454                         exists = protocols[n] == proto;
1455                 XFree(protocols);
1456         }
1457         if (exists) {
1458                 ev.type = ClientMessage;
1459                 ev.xclient.window = c->win;
1460                 ev.xclient.message_type = wmatom[WMProtocols];
1461                 ev.xclient.format = 32;
1462                 ev.xclient.data.l[0] = proto;
1463                 ev.xclient.data.l[1] = CurrentTime;
1464                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1465         }
1466         return exists;
1467 }
1468
1469 void
1470 setfocus(Client *c)
1471 {
1472         if (!c->neverfocus) {
1473                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1474                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1475                         XA_WINDOW, 32, PropModeReplace,
1476                         (unsigned char *) &(c->win), 1);
1477         }
1478         sendevent(c, wmatom[WMTakeFocus]);
1479 }
1480
1481 void
1482 setfullscreen(Client *c, int fullscreen)
1483 {
1484         if (fullscreen && !c->isfullscreen) {
1485                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1486                         PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1487                 c->isfullscreen = 1;
1488                 c->oldstate = c->isfloating;
1489                 c->oldbw = c->bw;
1490                 c->bw = 0;
1491                 c->isfloating = 1;
1492                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1493                 XRaiseWindow(dpy, c->win);
1494         } else if (!fullscreen && c->isfullscreen){
1495                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1496                         PropModeReplace, (unsigned char*)0, 0);
1497                 c->isfullscreen = 0;
1498                 c->isfloating = c->oldstate;
1499                 c->bw = c->oldbw;
1500                 c->x = c->oldx;
1501                 c->y = c->oldy;
1502                 c->w = c->oldw;
1503                 c->h = c->oldh;
1504                 resizeclient(c, c->x, c->y, c->w, c->h);
1505                 arrange(c->mon);
1506         }
1507 }
1508
1509 void
1510 setlayout(const Arg *arg)
1511 {
1512         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1513                 selmon->sellt ^= 1;
1514         if (arg && arg->v)
1515                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1516         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1517         if (selmon->sel)
1518                 arrange(selmon);
1519         else
1520                 drawbar(selmon);
1521 }
1522
1523 /* arg > 1.0 will set mfact absolutely */
1524 void
1525 setmfact(const Arg *arg)
1526 {
1527         float f;
1528
1529         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1530                 return;
1531         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1532         if (f < 0.05 || f > 0.95)
1533                 return;
1534         selmon->mfact = f;
1535         arrange(selmon);
1536 }
1537
1538 void
1539 setup(void)
1540 {
1541         int i;
1542         XSetWindowAttributes wa;
1543         Atom utf8string;
1544         struct sigaction sa;
1545
1546         /* do not transform children into zombies when they terminate */
1547         sigemptyset(&sa.sa_mask);
1548         sa.sa_flags = SA_NOCLDSTOP | SA_NOCLDWAIT | SA_RESTART;
1549         sa.sa_handler = SIG_IGN;
1550         sigaction(SIGCHLD, &sa, NULL);
1551
1552         /* clean up any zombies (inherited from .xinitrc etc) immediately */
1553         while (waitpid(-1, NULL, WNOHANG) > 0);
1554
1555         /* init screen */
1556         screen = DefaultScreen(dpy);
1557         sw = DisplayWidth(dpy, screen);
1558         sh = DisplayHeight(dpy, screen);
1559         root = RootWindow(dpy, screen);
1560         drw = drw_create(dpy, screen, root, sw, sh);
1561         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1562                 die("no fonts could be loaded.");
1563         lrpad = drw->fonts->h;
1564         bh = drw->fonts->h + 2;
1565         updategeom();
1566         /* init atoms */
1567         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1568         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1569         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1570         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1571         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1572         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1573         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1574         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1575         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1576         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1577         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1578         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1579         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1580         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1581         /* init cursors */
1582         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1583         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1584         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1585         /* init appearance */
1586         scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
1587         for (i = 0; i < LENGTH(colors); i++)
1588                 scheme[i] = drw_scm_create(drw, colors[i], 3);
1589         /* init bars */
1590         updatebars();
1591         updatestatus();
1592         /* supporting window for NetWMCheck */
1593         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1594         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1595                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1596         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1597                 PropModeReplace, (unsigned char *) "dwm", 3);
1598         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1599                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1600         /* EWMH support per view */
1601         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1602                 PropModeReplace, (unsigned char *) netatom, NetLast);
1603         XDeleteProperty(dpy, root, netatom[NetClientList]);
1604         /* select events */
1605         wa.cursor = cursor[CurNormal]->cursor;
1606         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1607                 |ButtonPressMask|PointerMotionMask|EnterWindowMask
1608                 |LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1609         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1610         XSelectInput(dpy, root, wa.event_mask);
1611         grabkeys();
1612         focus(NULL);
1613 }
1614
1615 void
1616 seturgent(Client *c, int urg)
1617 {
1618         XWMHints *wmh;
1619
1620         c->isurgent = urg;
1621         if (!(wmh = XGetWMHints(dpy, c->win)))
1622                 return;
1623         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1624         XSetWMHints(dpy, c->win, wmh);
1625         XFree(wmh);
1626 }
1627
1628 void
1629 showhide(Client *c)
1630 {
1631         if (!c)
1632                 return;
1633         if (ISVISIBLE(c)) {
1634                 /* show clients top down */
1635                 XMoveWindow(dpy, c->win, c->x, c->y);
1636                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1637                         resize(c, c->x, c->y, c->w, c->h, 0);
1638                 showhide(c->snext);
1639         } else {
1640                 /* hide clients bottom up */
1641                 showhide(c->snext);
1642                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1643         }
1644 }
1645
1646 void
1647 spawn(const Arg *arg)
1648 {
1649         struct sigaction sa;
1650
1651         if (arg->v == dmenucmd)
1652                 dmenumon[0] = '0' + selmon->num;
1653         if (fork() == 0) {
1654                 if (dpy)
1655                         close(ConnectionNumber(dpy));
1656                 setsid();
1657
1658                 sigemptyset(&sa.sa_mask);
1659                 sa.sa_flags = 0;
1660                 sa.sa_handler = SIG_DFL;
1661                 sigaction(SIGCHLD, &sa, NULL);
1662
1663                 execvp(((char **)arg->v)[0], (char **)arg->v);
1664                 die("dwm: execvp '%s' failed:", ((char **)arg->v)[0]);
1665         }
1666 }
1667
1668 void
1669 tag(const Arg *arg)
1670 {
1671         if (selmon->sel && arg->ui & TAGMASK) {
1672                 selmon->sel->tags = arg->ui & TAGMASK;
1673                 focus(NULL);
1674                 arrange(selmon);
1675         }
1676 }
1677
1678 void
1679 tagmon(const Arg *arg)
1680 {
1681         if (!selmon->sel || !mons->next)
1682                 return;
1683         sendmon(selmon->sel, dirtomon(arg->i));
1684 }
1685
1686 void
1687 tile(Monitor *m)
1688 {
1689         unsigned int i, n, h, mw, my, ty;
1690         Client *c;
1691
1692         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1693         if (n == 0)
1694                 return;
1695
1696         if (n > m->nmaster)
1697                 mw = m->nmaster ? m->ww * m->mfact : 0;
1698         else
1699                 mw = m->ww;
1700         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1701                 if (i < m->nmaster) {
1702                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1703                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1704                         if (my + HEIGHT(c) < m->wh)
1705                                 my += HEIGHT(c);
1706                 } else {
1707                         h = (m->wh - ty) / (n - i);
1708                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1709                         if (ty + HEIGHT(c) < m->wh)
1710                                 ty += HEIGHT(c);
1711                 }
1712 }
1713
1714 void
1715 togglebar(const Arg *arg)
1716 {
1717         selmon->showbar = !selmon->showbar;
1718         updatebarpos(selmon);
1719         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1720         arrange(selmon);
1721 }
1722
1723 void
1724 togglefloating(const Arg *arg)
1725 {
1726         if (!selmon->sel)
1727                 return;
1728         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1729                 return;
1730         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1731         if (selmon->sel->isfloating)
1732                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1733                         selmon->sel->w, selmon->sel->h, 0);
1734         arrange(selmon);
1735 }
1736
1737 void
1738 toggletag(const Arg *arg)
1739 {
1740         unsigned int newtags;
1741
1742         if (!selmon->sel)
1743                 return;
1744         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1745         if (newtags) {
1746                 selmon->sel->tags = newtags;
1747                 focus(NULL);
1748                 arrange(selmon);
1749         }
1750 }
1751
1752 void
1753 toggleview(const Arg *arg)
1754 {
1755         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1756
1757         if (newtagset) {
1758                 selmon->tagset[selmon->seltags] = newtagset;
1759                 focus(NULL);
1760                 arrange(selmon);
1761         }
1762 }
1763
1764 void
1765 unfocus(Client *c, int setfocus)
1766 {
1767         if (!c)
1768                 return;
1769         grabbuttons(c, 0);
1770         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1771         if (setfocus) {
1772                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1773                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1774         }
1775 }
1776
1777 void
1778 unmanage(Client *c, int destroyed)
1779 {
1780         Monitor *m = c->mon;
1781         XWindowChanges wc;
1782
1783         detach(c);
1784         detachstack(c);
1785         if (!destroyed) {
1786                 wc.border_width = c->oldbw;
1787                 XGrabServer(dpy); /* avoid race conditions */
1788                 XSetErrorHandler(xerrordummy);
1789                 XSelectInput(dpy, c->win, NoEventMask);
1790                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1791                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1792                 setclientstate(c, WithdrawnState);
1793                 XSync(dpy, False);
1794                 XSetErrorHandler(xerror);
1795                 XUngrabServer(dpy);
1796         }
1797         free(c);
1798         focus(NULL);
1799         updateclientlist();
1800         arrange(m);
1801 }
1802
1803 void
1804 unmapnotify(XEvent *e)
1805 {
1806         Client *c;
1807         XUnmapEvent *ev = &e->xunmap;
1808
1809         if ((c = wintoclient(ev->window))) {
1810                 if (ev->send_event)
1811                         setclientstate(c, WithdrawnState);
1812                 else
1813                         unmanage(c, 0);
1814         }
1815 }
1816
1817 void
1818 updatebars(void)
1819 {
1820         Monitor *m;
1821         XSetWindowAttributes wa = {
1822                 .override_redirect = True,
1823                 .background_pixmap = ParentRelative,
1824                 .event_mask = ButtonPressMask|ExposureMask
1825         };
1826         XClassHint ch = {"dwm", "dwm"};
1827         for (m = mons; m; m = m->next) {
1828                 if (m->barwin)
1829                         continue;
1830                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1831                                 CopyFromParent, DefaultVisual(dpy, screen),
1832                                 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1833                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1834                 XMapRaised(dpy, m->barwin);
1835                 XSetClassHint(dpy, m->barwin, &ch);
1836         }
1837 }
1838
1839 void
1840 updatebarpos(Monitor *m)
1841 {
1842         m->wy = m->my;
1843         m->wh = m->mh;
1844         if (m->showbar) {
1845                 m->wh -= bh;
1846                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1847                 m->wy = m->topbar ? m->wy + bh : m->wy;
1848         } else
1849                 m->by = -bh;
1850 }
1851
1852 void
1853 updateclientlist(void)
1854 {
1855         Client *c;
1856         Monitor *m;
1857
1858         XDeleteProperty(dpy, root, netatom[NetClientList]);
1859         for (m = mons; m; m = m->next)
1860                 for (c = m->clients; c; c = c->next)
1861                         XChangeProperty(dpy, root, netatom[NetClientList],
1862                                 XA_WINDOW, 32, PropModeAppend,
1863                                 (unsigned char *) &(c->win), 1);
1864 }
1865
1866 int
1867 updategeom(void)
1868 {
1869         int dirty = 0;
1870
1871 #ifdef XINERAMA
1872         if (XineramaIsActive(dpy)) {
1873                 int i, j, n, nn;
1874                 Client *c;
1875                 Monitor *m;
1876                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1877                 XineramaScreenInfo *unique = NULL;
1878
1879                 for (n = 0, m = mons; m; m = m->next, n++);
1880                 /* only consider unique geometries as separate screens */
1881                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1882                 for (i = 0, j = 0; i < nn; i++)
1883                         if (isuniquegeom(unique, j, &info[i]))
1884                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1885                 XFree(info);
1886                 nn = j;
1887
1888                 /* new monitors if nn > n */
1889                 for (i = n; i < nn; i++) {
1890                         for (m = mons; m && m->next; m = m->next);
1891                         if (m)
1892                                 m->next = createmon();
1893                         else
1894                                 mons = createmon();
1895                 }
1896                 for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1897                         if (i >= n
1898                         || unique[i].x_org != m->mx || unique[i].y_org != m->my
1899                         || unique[i].width != m->mw || unique[i].height != m->mh)
1900                         {
1901                                 dirty = 1;
1902                                 m->num = i;
1903                                 m->mx = m->wx = unique[i].x_org;
1904                                 m->my = m->wy = unique[i].y_org;
1905                                 m->mw = m->ww = unique[i].width;
1906                                 m->mh = m->wh = unique[i].height;
1907                                 updatebarpos(m);
1908                         }
1909                 /* removed monitors if n > nn */
1910                 for (i = nn; i < n; i++) {
1911                         for (m = mons; m && m->next; m = m->next);
1912                         while ((c = m->clients)) {
1913                                 dirty = 1;
1914                                 m->clients = c->next;
1915                                 detachstack(c);
1916                                 c->mon = mons;
1917                                 attach(c);
1918                                 attachstack(c);
1919                         }
1920                         if (m == selmon)
1921                                 selmon = mons;
1922                         cleanupmon(m);
1923                 }
1924                 free(unique);
1925         } else
1926 #endif /* XINERAMA */
1927         { /* default monitor setup */
1928                 if (!mons)
1929                         mons = createmon();
1930                 if (mons->mw != sw || mons->mh != sh) {
1931                         dirty = 1;
1932                         mons->mw = mons->ww = sw;
1933                         mons->mh = mons->wh = sh;
1934                         updatebarpos(mons);
1935                 }
1936         }
1937         if (dirty) {
1938                 selmon = mons;
1939                 selmon = wintomon(root);
1940         }
1941         return dirty;
1942 }
1943
1944 void
1945 updatenumlockmask(void)
1946 {
1947         unsigned int i, j;
1948         XModifierKeymap *modmap;
1949
1950         numlockmask = 0;
1951         modmap = XGetModifierMapping(dpy);
1952         for (i = 0; i < 8; i++)
1953                 for (j = 0; j < modmap->max_keypermod; j++)
1954                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1955                                 == XKeysymToKeycode(dpy, XK_Num_Lock))
1956                                 numlockmask = (1 << i);
1957         XFreeModifiermap(modmap);
1958 }
1959
1960 void
1961 updatesizehints(Client *c)
1962 {
1963         long msize;
1964         XSizeHints size;
1965
1966         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1967                 /* size is uninitialized, ensure that size.flags aren't used */
1968                 size.flags = PSize;
1969         if (size.flags & PBaseSize) {
1970                 c->basew = size.base_width;
1971                 c->baseh = size.base_height;
1972         } else if (size.flags & PMinSize) {
1973                 c->basew = size.min_width;
1974                 c->baseh = size.min_height;
1975         } else
1976                 c->basew = c->baseh = 0;
1977         if (size.flags & PResizeInc) {
1978                 c->incw = size.width_inc;
1979                 c->inch = size.height_inc;
1980         } else
1981                 c->incw = c->inch = 0;
1982         if (size.flags & PMaxSize) {
1983                 c->maxw = size.max_width;
1984                 c->maxh = size.max_height;
1985         } else
1986                 c->maxw = c->maxh = 0;
1987         if (size.flags & PMinSize) {
1988                 c->minw = size.min_width;
1989                 c->minh = size.min_height;
1990         } else if (size.flags & PBaseSize) {
1991                 c->minw = size.base_width;
1992                 c->minh = size.base_height;
1993         } else
1994                 c->minw = c->minh = 0;
1995         if (size.flags & PAspect) {
1996                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1997                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1998         } else
1999                 c->maxa = c->mina = 0.0;
2000         c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
2001         c->hintsvalid = 1;
2002 }
2003
2004 void
2005 updatestatus(void)
2006 {
2007         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2008                 strcpy(stext, "dwm-"VERSION);
2009         drawbar(selmon);
2010 }
2011
2012 void
2013 updatetitle(Client *c)
2014 {
2015         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2016                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2017         if (c->name[0] == '\0') /* hack to mark broken clients */
2018                 strcpy(c->name, broken);
2019 }
2020
2021 void
2022 updatewindowtype(Client *c)
2023 {
2024         Atom state = getatomprop(c, netatom[NetWMState]);
2025         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2026
2027         if (state == netatom[NetWMFullscreen])
2028                 setfullscreen(c, 1);
2029         if (wtype == netatom[NetWMWindowTypeDialog])
2030                 c->isfloating = 1;
2031 }
2032
2033 void
2034 updatewmhints(Client *c)
2035 {
2036         XWMHints *wmh;
2037
2038         if ((wmh = XGetWMHints(dpy, c->win))) {
2039                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2040                         wmh->flags &= ~XUrgencyHint;
2041                         XSetWMHints(dpy, c->win, wmh);
2042                 } else
2043                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2044                 if (wmh->flags & InputHint)
2045                         c->neverfocus = !wmh->input;
2046                 else
2047                         c->neverfocus = 0;
2048                 XFree(wmh);
2049         }
2050 }
2051
2052 void
2053 view(const Arg *arg)
2054 {
2055         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2056                 return;
2057         selmon->seltags ^= 1; /* toggle sel tagset */
2058         if (arg->ui & TAGMASK)
2059                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2060         focus(NULL);
2061         arrange(selmon);
2062 }
2063
2064 Client *
2065 wintoclient(Window w)
2066 {
2067         Client *c;
2068         Monitor *m;
2069
2070         for (m = mons; m; m = m->next)
2071                 for (c = m->clients; c; c = c->next)
2072                         if (c->win == w)
2073                                 return c;
2074         return NULL;
2075 }
2076
2077 Monitor *
2078 wintomon(Window w)
2079 {
2080         int x, y;
2081         Client *c;
2082         Monitor *m;
2083
2084         if (w == root && getrootptr(&x, &y))
2085                 return recttomon(x, y, 1, 1);
2086         for (m = mons; m; m = m->next)
2087                 if (w == m->barwin)
2088                         return m;
2089         if ((c = wintoclient(w)))
2090                 return c->mon;
2091         return selmon;
2092 }
2093
2094 /* There's no way to check accesses to destroyed windows, thus those cases are
2095  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2096  * default error handler, which may call exit. */
2097 int
2098 xerror(Display *dpy, XErrorEvent *ee)
2099 {
2100         if (ee->error_code == BadWindow
2101         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2102         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2103         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2104         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2105         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2106         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2107         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2108         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2109                 return 0;
2110         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2111                 ee->request_code, ee->error_code);
2112         return xerrorxlib(dpy, ee); /* may call exit */
2113 }
2114
2115 int
2116 xerrordummy(Display *dpy, XErrorEvent *ee)
2117 {
2118         return 0;
2119 }
2120
2121 /* Startup Error handler to check if another window manager
2122  * is already running. */
2123 int
2124 xerrorstart(Display *dpy, XErrorEvent *ee)
2125 {
2126         die("dwm: another window manager is already running");
2127         return -1;
2128 }
2129
2130 void
2131 zoom(const Arg *arg)
2132 {
2133         Client *c = selmon->sel;
2134
2135         if (!selmon->lt[selmon->sellt]->arrange || !c || c->isfloating)
2136                 return;
2137         if (c == nexttiled(selmon->clients) && !(c = nexttiled(c->next)))
2138                 return;
2139         pop(c);
2140 }
2141
2142 int
2143 main(int argc, char *argv[])
2144 {
2145         if (argc == 2 && !strcmp("-v", argv[1]))
2146                 die("dwm-"VERSION);
2147         else if (argc != 1)
2148                 die("usage: dwm [-v]");
2149         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2150                 fputs("warning: no locale support\n", stderr);
2151         if (!(dpy = XOpenDisplay(NULL)))
2152                 die("dwm: cannot open display");
2153         checkotherwm();
2154         setup();
2155 #ifdef __OpenBSD__
2156         if (pledge("stdio rpath proc exec", NULL) == -1)
2157                 die("pledge");
2158 #endif /* __OpenBSD__ */
2159         scan();
2160         run();
2161         cleanup();
2162         XCloseDisplay(dpy);
2163         return EXIT_SUCCESS;
2164 }