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
  60 /* enums */
  61 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  62 enum { SchemeNorm, SchemeSel }; /* color schemes */
  63 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  64        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  65        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  66 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  67 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  68        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  69
  70 typedef union {
  71         int i;
  72         unsigned int ui;
  73         float f;
  74         const void *v;
  75 } Arg;
  76
  77 typedef struct {
  78         unsigned int click;
  79         unsigned int mask;
  80         unsigned int button;
  81         void (*func)(const Arg *arg);
  82         const Arg arg;
  83 } Button;
  84
  85 typedef struct Monitor Monitor;
  86 typedef struct Client Client;
  87 struct Client {
  88         char name[256];
  89         float mina, maxa;
  90         int x, y, w, h;
  91         int oldx, oldy, oldw, oldh;
  92         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  93         int bw, oldbw;
  94         unsigned int tags;
  95         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  96         Client *next;
  97         Client *snext;
  98         Monitor *mon;
  99         Window win;
 100 };
 101
 102 typedef struct {
 103         unsigned int mod;
 104         KeySym keysym;
 105         void (*func)(const Arg *);
 106         const Arg arg;
 107 } Key;
 108
 109 typedef struct {
 110         const char *symbol;
 111         void (*arrange)(Monitor *);
 112 } Layout;
 113
 114 struct Monitor {
 115         char ltsymbol[16];
 116         float mfact;
 117         int nmaster;
 118         int num;
 119         int by;               /* bar geometry */
 120         int mx, my, mw, mh;   /* screen size */
 121         int wx, wy, ww, wh;   /* window area  */
 122         unsigned int seltags;
 123         unsigned int sellt;
 124         unsigned int tagset[2];
 125         int showbar;
 126         int topbar;
 127         Client *clients;
 128         Client *sel;
 129         Client *stack;
 130         Monitor *next;
 131         Window barwin;
 132         const Layout *lt[2];
 133 };
 134
 135 typedef struct {
 136         const char *class;
 137         const char *instance;
 138         const char *title;
 139         unsigned int tags;
 140         int isfloating;
 141         int monitor;
 142 } Rule;
 143
 144 /* function declarations */
 145 static void applyrules(Client *c);
 146 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 147 static void arrange(Monitor *m);
 148 static void arrangemon(Monitor *m);
 149 static void attach(Client *c);
 150 static void attachstack(Client *c);
 151 static void buttonpress(XEvent *e);
 152 static void checkotherwm(void);
 153 static void cleanup(void);
 154 static void cleanupmon(Monitor *mon);
 155 static void clientmessage(XEvent *e);
 156 static void configure(Client *c);
 157 static void configurenotify(XEvent *e);
 158 static void configurerequest(XEvent *e);
 159 static Monitor *createmon(void);
 160 static void destroynotify(XEvent *e);
 161 static void detach(Client *c);
 162 static void detachstack(Client *c);
 163 static Monitor *dirtomon(int dir);
 164 static void drawbar(Monitor *m);
 165 static void drawbars(void);
 166 static void enternotify(XEvent *e);
 167 static void expose(XEvent *e);
 168 static void focus(Client *c);
 169 static void focusin(XEvent *e);
 170 static void focusmon(const Arg *arg);
 171 static void focusstack(const Arg *arg);
 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 *);
 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 sigchld(int unused);
 208 static void spawn(const Arg *arg);
 209 static void tag(const Arg *arg);
 210 static void tagmon(const Arg *arg);
 211 static void tile(Monitor *);
 212 static void togglebar(const Arg *arg);
 213 static void togglefloating(const Arg *arg);
 214 static void toggletag(const Arg *arg);
 215 static void toggleview(const Arg *arg);
 216 static void unfocus(Client *c, int setfocus);
 217 static void unmanage(Client *c, int destroyed);
 218 static void unmapnotify(XEvent *e);
 219 static void updatebarpos(Monitor *m);
 220 static void updatebars(void);
 221 static void updateclientlist(void);
 222 static int updategeom(void);
 223 static void updatenumlockmask(void);
 224 static void updatesizehints(Client *c);
 225 static void updatestatus(void);
 226 static void updatetitle(Client *c);
 227 static void updatewindowtype(Client *c);
 228 static void updatewmhints(Client *c);
 229 static void view(const Arg *arg);
 230 static Client *wintoclient(Window w);
 231 static Monitor *wintomon(Window w);
 232 static int xerror(Display *dpy, XErrorEvent *ee);
 233 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 234 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 235 static void zoom(const Arg *arg);
 236
 237 /* variables */
 238 static const char broken[] = "broken";
 239 static char stext[256];
 240 static int screen;
 241 static int sw, sh;           /* X display screen geometry width, height */
 242 static int bh, blw = 0;      /* bar geometry */
 243 static int lrpad;            /* sum of left and right padding for text */
 244 static int (*xerrorxlib)(Display *, XErrorEvent *);
 245 static unsigned int numlockmask = 0;
 246 static void (*handler[LASTEvent]) (XEvent *) = {
 247         [ButtonPress] = buttonpress,
 248         [ClientMessage] = clientmessage,
 249         [ConfigureRequest] = configurerequest,
 250         [ConfigureNotify] = configurenotify,
 251         [DestroyNotify] = destroynotify,
 252         [EnterNotify] = enternotify,
 253         [Expose] = expose,
 254         [FocusIn] = focusin,
 255         [KeyPress] = keypress,
 256         [MappingNotify] = mappingnotify,
 257         [MapRequest] = maprequest,
 258         [MotionNotify] = motionnotify,
 259         [PropertyNotify] = propertynotify,
 260         [UnmapNotify] = unmapnotify
 261 };
 262 static Atom wmatom[WMLast], netatom[NetLast];
 263 static int running = 1;
 264 static Cur *cursor[CurLast];
 265 static Clr **scheme;
 266 static Display *dpy;
 267 static Drw *drw;
 268 static Monitor *mons, *selmon;
 269 static Window root, wmcheckwin;
 270
 271 /* configuration, allows nested code to access above variables */
 272 #include "config.h"
 273
 274 /* compile-time check if all tags fit into an unsigned int bit array. */
 275 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 276
 277 /* function implementations */
 278 void
 279 applyrules(Client *c)
 280 {
 281         const char *class, *instance;
 282         unsigned int i;
 283         const Rule *r;
 284         Monitor *m;
 285         XClassHint ch = { NULL, NULL };
 286
 287         /* rule matching */
 288         c->isfloating = 0;
 289         c->tags = 0;
 290         XGetClassHint(dpy, c->win, &ch);
 291         class    = ch.res_class ? ch.res_class : broken;
 292         instance = ch.res_name  ? ch.res_name  : broken;
 293
 294         for (i = 0; i < LENGTH(rules); i++) {
 295                 r = &rules[i];
 296                 if ((!r->title || strstr(c->name, r->title))
 297                 && (!r->class || strstr(class, r->class))
 298                 && (!r->instance || strstr(instance, r->instance)))
 299                 {
 300                         c->isfloating = r->isfloating;
 301                         c->tags |= r->tags;
 302                         for (m = mons; m && m->num != r->monitor; m = m->next);
 303                         if (m)
 304                                 c->mon = m;
 305                 }
 306         }
 307         if (ch.res_class)
 308                 XFree(ch.res_class);
 309         if (ch.res_name)
 310                 XFree(ch.res_name);
 311         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 312 }
 313
 314 int
 315 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 316 {
 317         int baseismin;
 318         Monitor *m = c->mon;
 319
 320         /* set minimum possible */
 321         *w = MAX(1, *w);
 322         *h = MAX(1, *h);
 323         if (interact) {
 324                 if (*x > sw)
 325                         *x = sw - WIDTH(c);
 326                 if (*y > sh)
 327                         *y = sh - HEIGHT(c);
 328                 if (*x + *w + 2 * c->bw < 0)
 329                         *x = 0;
 330                 if (*y + *h + 2 * c->bw < 0)
 331                         *y = 0;
 332         } else {
 333                 if (*x >= m->wx + m->ww)
 334                         *x = m->wx + m->ww - WIDTH(c);
 335                 if (*y >= m->wy + m->wh)
 336                         *y = m->wy + m->wh - HEIGHT(c);
 337                 if (*x + *w + 2 * c->bw <= m->wx)
 338                         *x = m->wx;
 339                 if (*y + *h + 2 * c->bw <= m->wy)
 340                         *y = m->wy;
 341         }
 342         if (*h < bh)
 343                 *h = bh;
 344         if (*w < bh)
 345                 *w = bh;
 346         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 347                 /* see last two sentences in ICCCM 4.1.2.3 */
 348                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 349                 if (!baseismin) { /* temporarily remove base dimensions */
 350                         *w -= c->basew;
 351                         *h -= c->baseh;
 352                 }
 353                 /* adjust for aspect limits */
 354                 if (c->mina > 0 && c->maxa > 0) {
 355                         if (c->maxa < (float)*w / *h)
 356                                 *w = *h * c->maxa + 0.5;
 357                         else if (c->mina < (float)*h / *w)
 358                                 *h = *w * c->mina + 0.5;
 359                 }
 360                 if (baseismin) { /* increment calculation requires this */
 361                         *w -= c->basew;
 362                         *h -= c->baseh;
 363                 }
 364                 /* adjust for increment value */
 365                 if (c->incw)
 366                         *w -= *w % c->incw;
 367                 if (c->inch)
 368                         *h -= *h % c->inch;
 369                 /* restore base dimensions */
 370                 *w = MAX(*w + c->basew, c->minw);
 371                 *h = MAX(*h + c->baseh, c->minh);
 372                 if (c->maxw)
 373                         *w = MIN(*w, c->maxw);
 374                 if (c->maxh)
 375                         *h = MIN(*h, c->maxh);
 376         }
 377         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 378 }
 379
 380 void
 381 arrange(Monitor *m)
 382 {
 383         if (m)
 384                 showhide(m->stack);
 385         else for (m = mons; m; m = m->next)
 386                 showhide(m->stack);
 387         if (m) {
 388                 arrangemon(m);
 389                 restack(m);
 390         } else for (m = mons; m; m = m->next)
 391                 arrangemon(m);
 392 }
 393
 394 void
 395 arrangemon(Monitor *m)
 396 {
 397         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 398         if (m->lt[m->sellt]->arrange)
 399                 m->lt[m->sellt]->arrange(m);
 400 }
 401
 402 void
 403 attach(Client *c)
 404 {
 405         c->next = c->mon->clients;
 406         c->mon->clients = c;
 407 }
 408
 409 void
 410 attachstack(Client *c)
 411 {
 412         c->snext = c->mon->stack;
 413         c->mon->stack = c;
 414 }
 415
 416 void
 417 buttonpress(XEvent *e)
 418 {
 419         unsigned int i, x, click;
 420         Arg arg = {0};
 421         Client *c;
 422         Monitor *m;
 423         XButtonPressedEvent *ev = &e->xbutton;
 424
 425         click = ClkRootWin;
 426         /* focus monitor if necessary */
 427         if ((m = wintomon(ev->window)) && m != selmon) {
 428                 unfocus(selmon->sel, 1);
 429                 selmon = m;
 430                 focus(NULL);
 431         }
 432         if (ev->window == selmon->barwin) {
 433                 i = x = 0;
 434                 do
 435                         x += TEXTW(tags[i]);
 436                 while (ev->x >= x && ++i < LENGTH(tags));
 437                 if (i < LENGTH(tags)) {
 438                         click = ClkTagBar;
 439                         arg.ui = 1 << i;
 440                 } else if (ev->x < x + blw)
 441                         click = ClkLtSymbol;
 442                 else if (ev->x > selmon->ww - TEXTW(stext))
 443                         click = ClkStatusText;
 444                 else
 445                         click = ClkWinTitle;
 446         } else if ((c = wintoclient(ev->window))) {
 447                 focus(c);
 448                 restack(selmon);
 449                 XAllowEvents(dpy, ReplayPointer, CurrentTime);
 450                 click = ClkClientWin;
 451         }
 452         for (i = 0; i < LENGTH(buttons); i++)
 453                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 454                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 455                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 456 }
 457
 458 void
 459 checkotherwm(void)
 460 {
 461         xerrorxlib = XSetErrorHandler(xerrorstart);
 462         /* this causes an error if some other window manager is running */
 463         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 464         XSync(dpy, False);
 465         XSetErrorHandler(xerror);
 466         XSync(dpy, False);
 467 }
 468
 469 void
 470 cleanup(void)
 471 {
 472         Arg a = {.ui = ~0};
 473         Layout foo = { "", NULL };
 474         Monitor *m;
 475         size_t i;
 476
 477         view(&a);
 478         selmon->lt[selmon->sellt] = &foo;
 479         for (m = mons; m; m = m->next)
 480                 while (m->stack)
 481                         unmanage(m->stack, 0);
 482         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 483         while (mons)
 484                 cleanupmon(mons);
 485         for (i = 0; i < CurLast; i++)
 486                 drw_cur_free(drw, cursor[i]);
 487         for (i = 0; i < LENGTH(colors); i++)
 488                 free(scheme[i]);
 489         XDestroyWindow(dpy, wmcheckwin);
 490         drw_free(drw);
 491         XSync(dpy, False);
 492         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 493         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 494 }
 495
 496 void
 497 cleanupmon(Monitor *mon)
 498 {
 499         Monitor *m;
 500
 501         if (mon == mons)
 502                 mons = mons->next;
 503         else {
 504                 for (m = mons; m && m->next != mon; m = m->next);
 505                 m->next = mon->next;
 506         }
 507         XUnmapWindow(dpy, mon->barwin);
 508         XDestroyWindow(dpy, mon->barwin);
 509         free(mon);
 510 }
 511
 512 void
 513 clientmessage(XEvent *e)
 514 {
 515         XClientMessageEvent *cme = &e->xclient;
 516         Client *c = wintoclient(cme->window);
 517
 518         if (!c)
 519                 return;
 520         if (cme->message_type == netatom[NetWMState]) {
 521                 if (cme->data.l[1] == netatom[NetWMFullscreen]
 522                 || cme->data.l[2] == netatom[NetWMFullscreen])
 523                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 524                                 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 525         } else if (cme->message_type == netatom[NetActiveWindow]) {
 526                 if (c != selmon->sel && !c->isurgent)
 527                         seturgent(c, 1);
 528         }
 529 }
 530
 531 void
 532 configure(Client *c)
 533 {
 534         XConfigureEvent ce;
 535
 536         ce.type = ConfigureNotify;
 537         ce.display = dpy;
 538         ce.event = c->win;
 539         ce.window = c->win;
 540         ce.x = c->x;
 541         ce.y = c->y;
 542         ce.width = c->w;
 543         ce.height = c->h;
 544         ce.border_width = c->bw;
 545         ce.above = None;
 546         ce.override_redirect = False;
 547         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 548 }
 549
 550 void
 551 configurenotify(XEvent *e)
 552 {
 553         Monitor *m;
 554         Client *c;
 555         XConfigureEvent *ev = &e->xconfigure;
 556         int dirty;
 557
 558         /* TODO: updategeom handling sucks, needs to be simplified */
 559         if (ev->window == root) {
 560                 dirty = (sw != ev->width || sh != ev->height);
 561                 sw = ev->width;
 562                 sh = ev->height;
 563                 if (updategeom() || dirty) {
 564                         drw_resize(drw, sw, bh);
 565                         updatebars();
 566                         for (m = mons; m; m = m->next) {
 567                                 for (c = m->clients; c; c = c->next)
 568                                         if (c->isfullscreen)
 569                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 570                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 571                         }
 572                         focus(NULL);
 573                         arrange(NULL);
 574                 }
 575         }
 576 }
 577
 578 void
 579 configurerequest(XEvent *e)
 580 {
 581         Client *c;
 582         Monitor *m;
 583         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 584         XWindowChanges wc;
 585
 586         if ((c = wintoclient(ev->window))) {
 587                 if (ev->value_mask & CWBorderWidth)
 588                         c->bw = ev->border_width;
 589                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 590                         m = c->mon;
 591                         if (ev->value_mask & CWX) {
 592                                 c->oldx = c->x;
 593                                 c->x = m->mx + ev->x;
 594                         }
 595                         if (ev->value_mask & CWY) {
 596                                 c->oldy = c->y;
 597                                 c->y = m->my + ev->y;
 598                         }
 599                         if (ev->value_mask & CWWidth) {
 600                                 c->oldw = c->w;
 601                                 c->w = ev->width;
 602                         }
 603                         if (ev->value_mask & CWHeight) {
 604                                 c->oldh = c->h;
 605                                 c->h = ev->height;
 606                         }
 607                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 608                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 609                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 610                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 611                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 612                                 configure(c);
 613                         if (ISVISIBLE(c))
 614                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 615                 } else
 616                         configure(c);
 617         } else {
 618                 wc.x = ev->x;
 619                 wc.y = ev->y;
 620                 wc.width = ev->width;
 621                 wc.height = ev->height;
 622                 wc.border_width = ev->border_width;
 623                 wc.sibling = ev->above;
 624                 wc.stack_mode = ev->detail;
 625                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 626         }
 627         XSync(dpy, False);
 628 }
 629
 630 Monitor *
 631 createmon(void)
 632 {
 633         Monitor *m;
 634
 635         m = ecalloc(1, sizeof(Monitor));
 636         m->tagset[0] = m->tagset[1] = 1;
 637         m->mfact = mfact;
 638         m->nmaster = nmaster;
 639         m->showbar = showbar;
 640         m->topbar = topbar;
 641         m->lt[0] = &layouts[0];
 642         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 643         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 644         return m;
 645 }
 646
 647 void
 648 destroynotify(XEvent *e)
 649 {
 650         Client *c;
 651         XDestroyWindowEvent *ev = &e->xdestroywindow;
 652
 653         if ((c = wintoclient(ev->window)))
 654                 unmanage(c, 1);
 655 }
 656
 657 void
 658 detach(Client *c)
 659 {
 660         Client **tc;
 661
 662         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 663         *tc = c->next;
 664 }
 665
 666 void
 667 detachstack(Client *c)
 668 {
 669         Client **tc, *t;
 670
 671         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 672         *tc = c->snext;
 673
 674         if (c == c->mon->sel) {
 675                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 676                 c->mon->sel = t;
 677         }
 678 }
 679
 680 Monitor *
 681 dirtomon(int dir)
 682 {
 683         Monitor *m = NULL;
 684
 685         if (dir > 0) {
 686                 if (!(m = selmon->next))
 687                         m = mons;
 688         } else if (selmon == mons)
 689                 for (m = mons; m->next; m = m->next);
 690         else
 691                 for (m = mons; m->next != selmon; m = m->next);
 692         return m;
 693 }
 694
 695 void
 696 drawbar(Monitor *m)
 697 {
 698         int x, w, sw = 0;
 699         int boxs = drw->fonts->h / 9;
 700         int boxw = drw->fonts->h / 6 + 2;
 701         unsigned int i, occ = 0, urg = 0;
 702         Client *c;
 703
 704         /* draw status first so it can be overdrawn by tags later */
 705         if (m == selmon) { /* status is only drawn on selected monitor */
 706                 drw_setscheme(drw, scheme[SchemeNorm]);
 707                 sw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 708                 drw_text(drw, m->ww - sw, 0, sw, bh, 0, stext, 0);
 709         }
 710
 711         for (c = m->clients; c; c = c->next) {
 712                 occ |= c->tags;
 713                 if (c->isurgent)
 714                         urg |= c->tags;
 715         }
 716         x = 0;
 717         for (i = 0; i < LENGTH(tags); i++) {
 718                 w = TEXTW(tags[i]);
 719                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 720                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 721                 if (occ & 1 << i)
 722                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 723                                 m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 724                                 urg & 1 << i);
 725                 x += w;
 726         }
 727         w = blw = TEXTW(m->ltsymbol);
 728         drw_setscheme(drw, scheme[SchemeNorm]);
 729         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 730
 731         if ((w = m->ww - sw - x) > bh) {
 732                 if (m->sel) {
 733                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 734                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 735                         if (m->sel->isfloating)
 736                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 737                 } else {
 738                         drw_setscheme(drw, scheme[SchemeNorm]);
 739                         drw_rect(drw, x, 0, w, bh, 1, 1);
 740                 }
 741         }
 742         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 743 }
 744
 745 void
 746 drawbars(void)
 747 {
 748         Monitor *m;
 749
 750         for (m = mons; m; m = m->next)
 751                 drawbar(m);
 752 }
 753
 754 void
 755 enternotify(XEvent *e)
 756 {
 757         Client *c;
 758         Monitor *m;
 759         XCrossingEvent *ev = &e->xcrossing;
 760
 761         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 762                 return;
 763         c = wintoclient(ev->window);
 764         m = c ? c->mon : wintomon(ev->window);
 765         if (m != selmon) {
 766                 unfocus(selmon->sel, 1);
 767                 selmon = m;
 768         } else if (!c || c == selmon->sel)
 769                 return;
 770         focus(c);
 771 }
 772
 773 void
 774 expose(XEvent *e)
 775 {
 776         Monitor *m;
 777         XExposeEvent *ev = &e->xexpose;
 778
 779         if (ev->count == 0 && (m = wintomon(ev->window)))
 780                 drawbar(m);
 781 }
 782
 783 void
 784 focus(Client *c)
 785 {
 786         if (!c || !ISVISIBLE(c))
 787                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 788         if (selmon->sel && selmon->sel != c)
 789                 unfocus(selmon->sel, 0);
 790         if (c) {
 791                 if (c->mon != selmon)
 792                         selmon = c->mon;
 793                 if (c->isurgent)
 794                         seturgent(c, 0);
 795                 detachstack(c);
 796                 attachstack(c);
 797                 grabbuttons(c, 1);
 798                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 799                 setfocus(c);
 800         } else {
 801                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 802                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 803         }
 804         selmon->sel = c;
 805         drawbars();
 806 }
 807
 808 /* there are some broken focus acquiring clients needing extra handling */
 809 void
 810 focusin(XEvent *e)
 811 {
 812         XFocusChangeEvent *ev = &e->xfocus;
 813
 814         if (selmon->sel && ev->window != selmon->sel->win)
 815                 setfocus(selmon->sel);
 816 }
 817
 818 void
 819 focusmon(const Arg *arg)
 820 {
 821         Monitor *m;
 822
 823         if (!mons->next)
 824                 return;
 825         if ((m = dirtomon(arg->i)) == selmon)
 826                 return;
 827         unfocus(selmon->sel, 0);
 828         selmon = m;
 829         focus(NULL);
 830 }
 831
 832 void
 833 focusstack(const Arg *arg)
 834 {
 835         Client *c = NULL, *i;
 836
 837         if (!selmon->sel)
 838                 return;
 839         if (arg->i > 0) {
 840                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 841                 if (!c)
 842                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 843         } else {
 844                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 845                         if (ISVISIBLE(i))
 846                                 c = i;
 847                 if (!c)
 848                         for (; i; i = i->next)
 849                                 if (ISVISIBLE(i))
 850                                         c = i;
 851         }
 852         if (c) {
 853                 focus(c);
 854                 restack(selmon);
 855         }
 856 }
 857
 858 Atom
 859 getatomprop(Client *c, Atom prop)
 860 {
 861         int di;
 862         unsigned long dl;
 863         unsigned char *p = NULL;
 864         Atom da, atom = None;
 865
 866         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 867                 &da, &di, &dl, &dl, &p) == Success && p) {
 868                 atom = *(Atom *)p;
 869                 XFree(p);
 870         }
 871         return atom;
 872 }
 873
 874 int
 875 getrootptr(int *x, int *y)
 876 {
 877         int di;
 878         unsigned int dui;
 879         Window dummy;
 880
 881         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 882 }
 883
 884 long
 885 getstate(Window w)
 886 {
 887         int format;
 888         long result = -1;
 889         unsigned char *p = NULL;
 890         unsigned long n, extra;
 891         Atom real;
 892
 893         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 894                 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 895                 return -1;
 896         if (n != 0)
 897                 result = *p;
 898         XFree(p);
 899         return result;
 900 }
 901
 902 int
 903 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 904 {
 905         char **list = NULL;
 906         int n;
 907         XTextProperty name;
 908
 909         if (!text || size == 0)
 910                 return 0;
 911         text[0] = '\0';
 912         if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
 913                 return 0;
 914         if (name.encoding == XA_STRING)
 915                 strncpy(text, (char *)name.value, size - 1);
 916         else {
 917                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 918                         strncpy(text, *list, size - 1);
 919                         XFreeStringList(list);
 920                 }
 921         }
 922         text[size - 1] = '\0';
 923         XFree(name.value);
 924         return 1;
 925 }
 926
 927 void
 928 grabbuttons(Client *c, int focused)
 929 {
 930         updatenumlockmask();
 931         {
 932                 unsigned int i, j;
 933                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 934                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 935                 if (!focused)
 936                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 937                                 BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
 938                 for (i = 0; i < LENGTH(buttons); i++)
 939                         if (buttons[i].click == ClkClientWin)
 940                                 for (j = 0; j < LENGTH(modifiers); j++)
 941                                         XGrabButton(dpy, buttons[i].button,
 942                                                 buttons[i].mask | modifiers[j],
 943                                                 c->win, False, BUTTONMASK,
 944                                                 GrabModeAsync, GrabModeSync, None, None);
 945         }
 946 }
 947
 948 void
 949 grabkeys(void)
 950 {
 951         updatenumlockmask();
 952         {
 953                 unsigned int i, j;
 954                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 955                 KeyCode code;
 956
 957                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 958                 for (i = 0; i < LENGTH(keys); i++)
 959                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 960                                 for (j = 0; j < LENGTH(modifiers); j++)
 961                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 962                                                 True, GrabModeAsync, GrabModeAsync);
 963         }
 964 }
 965
 966 void
 967 incnmaster(const Arg *arg)
 968 {
 969         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 970         arrange(selmon);
 971 }
 972
 973 #ifdef XINERAMA
 974 static int
 975 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 976 {
 977         while (n--)
 978                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 979                 && unique[n].width == info->width && unique[n].height == info->height)
 980                         return 0;
 981         return 1;
 982 }
 983 #endif /* XINERAMA */
 984
 985 void
 986 keypress(XEvent *e)
 987 {
 988         unsigned int i;
 989         KeySym keysym;
 990         XKeyEvent *ev;
 991
 992         ev = &e->xkey;
 993         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 994         for (i = 0; i < LENGTH(keys); i++)
 995                 if (keysym == keys[i].keysym
 996                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 997                 && keys[i].func)
 998                         keys[i].func(&(keys[i].arg));
 999 }
1000
1001 void
1002 killclient(const Arg *arg)
1003 {
1004         if (!selmon->sel)
1005                 return;
1006         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1007                 XGrabServer(dpy);
1008                 XSetErrorHandler(xerrordummy);
1009                 XSetCloseDownMode(dpy, DestroyAll);
1010                 XKillClient(dpy, selmon->sel->win);
1011                 XSync(dpy, False);
1012                 XSetErrorHandler(xerror);
1013                 XUngrabServer(dpy);
1014         }
1015 }
1016
1017 void
1018 manage(Window w, XWindowAttributes *wa)
1019 {
1020         Client *c, *t = NULL;
1021         Window trans = None;
1022         XWindowChanges wc;
1023
1024         c = ecalloc(1, sizeof(Client));
1025         c->win = w;
1026         /* geometry */
1027         c->x = c->oldx = wa->x;
1028         c->y = c->oldy = wa->y;
1029         c->w = c->oldw = wa->width;
1030         c->h = c->oldh = wa->height;
1031         c->oldbw = wa->border_width;
1032
1033         updatetitle(c);
1034         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1035                 c->mon = t->mon;
1036                 c->tags = t->tags;
1037         } else {
1038                 c->mon = selmon;
1039                 applyrules(c);
1040         }
1041
1042         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1043                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1044         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1045                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1046         c->x = MAX(c->x, c->mon->mx);
1047         /* only fix client y-offset, if the client center might cover the bar */
1048         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1049                 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1050         c->bw = borderpx;
1051
1052         wc.border_width = c->bw;
1053         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1054         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1055         configure(c); /* propagates border_width, if size doesn't change */
1056         updatewindowtype(c);
1057         updatesizehints(c);
1058         updatewmhints(c);
1059         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1060         grabbuttons(c, 0);
1061         if (!c->isfloating)
1062                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1063         if (c->isfloating)
1064                 XRaiseWindow(dpy, c->win);
1065         attach(c);
1066         attachstack(c);
1067         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1068                 (unsigned char *) &(c->win), 1);
1069         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1070         setclientstate(c, NormalState);
1071         if (c->mon == selmon)
1072                 unfocus(selmon->sel, 0);
1073         c->mon->sel = c;
1074         arrange(c->mon);
1075         XMapWindow(dpy, c->win);
1076         focus(NULL);
1077 }
1078
1079 void
1080 mappingnotify(XEvent *e)
1081 {
1082         XMappingEvent *ev = &e->xmapping;
1083
1084         XRefreshKeyboardMapping(ev);
1085         if (ev->request == MappingKeyboard)
1086                 grabkeys();
1087 }
1088
1089 void
1090 maprequest(XEvent *e)
1091 {
1092         static XWindowAttributes wa;
1093         XMapRequestEvent *ev = &e->xmaprequest;
1094
1095         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1096                 return;
1097         if (wa.override_redirect)
1098                 return;
1099         if (!wintoclient(ev->window))
1100                 manage(ev->window, &wa);
1101 }
1102
1103 void
1104 monocle(Monitor *m)
1105 {
1106         unsigned int n = 0;
1107         Client *c;
1108
1109         for (c = m->clients; c; c = c->next)
1110                 if (ISVISIBLE(c))
1111                         n++;
1112         if (n > 0) /* override layout symbol */
1113                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1114         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1115                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1116 }
1117
1118 void
1119 motionnotify(XEvent *e)
1120 {
1121         static Monitor *mon = NULL;
1122         Monitor *m;
1123         XMotionEvent *ev = &e->xmotion;
1124
1125         if (ev->window != root)
1126                 return;
1127         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1128                 unfocus(selmon->sel, 1);
1129                 selmon = m;
1130                 focus(NULL);
1131         }
1132         mon = m;
1133 }
1134
1135 void
1136 movemouse(const Arg *arg)
1137 {
1138         int x, y, ocx, ocy, nx, ny;
1139         Client *c;
1140         Monitor *m;
1141         XEvent ev;
1142         Time lasttime = 0;
1143
1144         if (!(c = selmon->sel))
1145                 return;
1146         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1147                 return;
1148         restack(selmon);
1149         ocx = c->x;
1150         ocy = c->y;
1151         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1152                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1153                 return;
1154         if (!getrootptr(&x, &y))
1155                 return;
1156         do {
1157                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1158                 switch(ev.type) {
1159                 case ConfigureRequest:
1160                 case Expose:
1161                 case MapRequest:
1162                         handler[ev.type](&ev);
1163                         break;
1164                 case MotionNotify:
1165                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1166                                 continue;
1167                         lasttime = ev.xmotion.time;
1168
1169                         nx = ocx + (ev.xmotion.x - x);
1170                         ny = ocy + (ev.xmotion.y - y);
1171                         if (abs(selmon->wx - nx) < snap)
1172                                 nx = selmon->wx;
1173                         else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1174                                 nx = selmon->wx + selmon->ww - WIDTH(c);
1175                         if (abs(selmon->wy - ny) < snap)
1176                                 ny = selmon->wy;
1177                         else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1178                                 ny = selmon->wy + selmon->wh - HEIGHT(c);
1179                         if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1180                         && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1181                                 togglefloating(NULL);
1182                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1183                                 resize(c, nx, ny, c->w, c->h, 1);
1184                         break;
1185                 }
1186         } while (ev.type != ButtonRelease);
1187         XUngrabPointer(dpy, CurrentTime);
1188         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1189                 sendmon(c, m);
1190                 selmon = m;
1191                 focus(NULL);
1192         }
1193 }
1194
1195 Client *
1196 nexttiled(Client *c)
1197 {
1198         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1199         return c;
1200 }
1201
1202 void
1203 pop(Client *c)
1204 {
1205         detach(c);
1206         attach(c);
1207         focus(c);
1208         arrange(c->mon);
1209 }
1210
1211 void
1212 propertynotify(XEvent *e)
1213 {
1214         Client *c;
1215         Window trans;
1216         XPropertyEvent *ev = &e->xproperty;
1217
1218         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1219                 updatestatus();
1220         else if (ev->state == PropertyDelete)
1221                 return; /* ignore */
1222         else if ((c = wintoclient(ev->window))) {
1223                 switch(ev->atom) {
1224                 default: break;
1225                 case XA_WM_TRANSIENT_FOR:
1226                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1227                                 (c->isfloating = (wintoclient(trans)) != NULL))
1228                                 arrange(c->mon);
1229                         break;
1230                 case XA_WM_NORMAL_HINTS:
1231                         updatesizehints(c);
1232                         break;
1233                 case XA_WM_HINTS:
1234                         updatewmhints(c);
1235                         drawbars();
1236                         break;
1237                 }
1238                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1239                         updatetitle(c);
1240                         if (c == c->mon->sel)
1241                                 drawbar(c->mon);
1242                 }
1243                 if (ev->atom == netatom[NetWMWindowType])
1244                         updatewindowtype(c);
1245         }
1246 }
1247
1248 void
1249 quit(const Arg *arg)
1250 {
1251         running = 0;
1252 }
1253
1254 Monitor *
1255 recttomon(int x, int y, int w, int h)
1256 {
1257         Monitor *m, *r = selmon;
1258         int a, area = 0;
1259
1260         for (m = mons; m; m = m->next)
1261                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1262                         area = a;
1263                         r = m;
1264                 }
1265         return r;
1266 }
1267
1268 void
1269 resize(Client *c, int x, int y, int w, int h, int interact)
1270 {
1271         if (applysizehints(c, &x, &y, &w, &h, interact))
1272                 resizeclient(c, x, y, w, h);
1273 }
1274
1275 void
1276 resizeclient(Client *c, int x, int y, int w, int h)
1277 {
1278         XWindowChanges wc;
1279
1280         c->oldx = c->x; c->x = wc.x = x;
1281         c->oldy = c->y; c->y = wc.y = y;
1282         c->oldw = c->w; c->w = wc.width = w;
1283         c->oldh = c->h; c->h = wc.height = h;
1284         wc.border_width = c->bw;
1285         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1286         configure(c);
1287         XSync(dpy, False);
1288 }
1289
1290 void
1291 resizemouse(const Arg *arg)
1292 {
1293         int ocx, ocy, nw, nh;
1294         Client *c;
1295         Monitor *m;
1296         XEvent ev;
1297         Time lasttime = 0;
1298
1299         if (!(c = selmon->sel))
1300                 return;
1301         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1302                 return;
1303         restack(selmon);
1304         ocx = c->x;
1305         ocy = c->y;
1306         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1307                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1308                 return;
1309         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1310         do {
1311                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1312                 switch(ev.type) {
1313                 case ConfigureRequest:
1314                 case Expose:
1315                 case MapRequest:
1316                         handler[ev.type](&ev);
1317                         break;
1318                 case MotionNotify:
1319                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1320                                 continue;
1321                         lasttime = ev.xmotion.time;
1322
1323                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1324                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1325                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1326                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1327                         {
1328                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1329                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1330                                         togglefloating(NULL);
1331                         }
1332                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1333                                 resize(c, c->x, c->y, nw, nh, 1);
1334                         break;
1335                 }
1336         } while (ev.type != ButtonRelease);
1337         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1338         XUngrabPointer(dpy, CurrentTime);
1339         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1340         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1341                 sendmon(c, m);
1342                 selmon = m;
1343                 focus(NULL);
1344         }
1345 }
1346
1347 void
1348 restack(Monitor *m)
1349 {
1350         Client *c;
1351         XEvent ev;
1352         XWindowChanges wc;
1353
1354         drawbar(m);
1355         if (!m->sel)
1356                 return;
1357         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1358                 XRaiseWindow(dpy, m->sel->win);
1359         if (m->lt[m->sellt]->arrange) {
1360                 wc.stack_mode = Below;
1361                 wc.sibling = m->barwin;
1362                 for (c = m->stack; c; c = c->snext)
1363                         if (!c->isfloating && ISVISIBLE(c)) {
1364                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1365                                 wc.sibling = c->win;
1366                         }
1367         }
1368         XSync(dpy, False);
1369         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1370 }
1371
1372 void
1373 run(void)
1374 {
1375         XEvent ev;
1376         /* main event loop */
1377         XSync(dpy, False);
1378         while (running && !XNextEvent(dpy, &ev))
1379                 if (handler[ev.type])
1380                         handler[ev.type](&ev); /* call handler */
1381 }
1382
1383 void
1384 scan(void)
1385 {
1386         unsigned int i, num;
1387         Window d1, d2, *wins = NULL;
1388         XWindowAttributes wa;
1389
1390         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1391                 for (i = 0; i < num; i++) {
1392                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1393                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1394                                 continue;
1395                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1396                                 manage(wins[i], &wa);
1397                 }
1398                 for (i = 0; i < num; i++) { /* now the transients */
1399                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1400                                 continue;
1401                         if (XGetTransientForHint(dpy, wins[i], &d1)
1402                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1403                                 manage(wins[i], &wa);
1404                 }
1405                 if (wins)
1406                         XFree(wins);
1407         }
1408 }
1409
1410 void
1411 sendmon(Client *c, Monitor *m)
1412 {
1413         if (c->mon == m)
1414                 return;
1415         unfocus(c, 1);
1416         detach(c);
1417         detachstack(c);
1418         c->mon = m;
1419         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1420         attach(c);
1421         attachstack(c);
1422         focus(NULL);
1423         arrange(NULL);
1424 }
1425
1426 void
1427 setclientstate(Client *c, long state)
1428 {
1429         long data[] = { state, None };
1430
1431         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1432                 PropModeReplace, (unsigned char *)data, 2);
1433 }
1434
1435 int
1436 sendevent(Client *c, Atom proto)
1437 {
1438         int n;
1439         Atom *protocols;
1440         int exists = 0;
1441         XEvent ev;
1442
1443         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1444                 while (!exists && n--)
1445                         exists = protocols[n] == proto;
1446                 XFree(protocols);
1447         }
1448         if (exists) {
1449                 ev.type = ClientMessage;
1450                 ev.xclient.window = c->win;
1451                 ev.xclient.message_type = wmatom[WMProtocols];
1452                 ev.xclient.format = 32;
1453                 ev.xclient.data.l[0] = proto;
1454                 ev.xclient.data.l[1] = CurrentTime;
1455                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1456         }
1457         return exists;
1458 }
1459
1460 void
1461 setfocus(Client *c)
1462 {
1463         if (!c->neverfocus) {
1464                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1465                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1466                         XA_WINDOW, 32, PropModeReplace,
1467                         (unsigned char *) &(c->win), 1);
1468         }
1469         sendevent(c, wmatom[WMTakeFocus]);
1470 }
1471
1472 void
1473 setfullscreen(Client *c, int fullscreen)
1474 {
1475         if (fullscreen && !c->isfullscreen) {
1476                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1477                         PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1478                 c->isfullscreen = 1;
1479                 c->oldstate = c->isfloating;
1480                 c->oldbw = c->bw;
1481                 c->bw = 0;
1482                 c->isfloating = 1;
1483                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1484                 XRaiseWindow(dpy, c->win);
1485         } else if (!fullscreen && c->isfullscreen){
1486                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1487                         PropModeReplace, (unsigned char*)0, 0);
1488                 c->isfullscreen = 0;
1489                 c->isfloating = c->oldstate;
1490                 c->bw = c->oldbw;
1491                 c->x = c->oldx;
1492                 c->y = c->oldy;
1493                 c->w = c->oldw;
1494                 c->h = c->oldh;
1495                 resizeclient(c, c->x, c->y, c->w, c->h);
1496                 arrange(c->mon);
1497         }
1498 }
1499
1500 void
1501 setlayout(const Arg *arg)
1502 {
1503         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1504                 selmon->sellt ^= 1;
1505         if (arg && arg->v)
1506                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1507         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1508         if (selmon->sel)
1509                 arrange(selmon);
1510         else
1511                 drawbar(selmon);
1512 }
1513
1514 /* arg > 1.0 will set mfact absolutely */
1515 void
1516 setmfact(const Arg *arg)
1517 {
1518         float f;
1519
1520         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1521                 return;
1522         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1523         if (f < 0.1 || f > 0.9)
1524                 return;
1525         selmon->mfact = f;
1526         arrange(selmon);
1527 }
1528
1529 void
1530 setup(void)
1531 {
1532         int i;
1533         XSetWindowAttributes wa;
1534         Atom utf8string;
1535
1536         /* clean up any zombies immediately */
1537         sigchld(0);
1538
1539         /* init screen */
1540         screen = DefaultScreen(dpy);
1541         sw = DisplayWidth(dpy, screen);
1542         sh = DisplayHeight(dpy, screen);
1543         root = RootWindow(dpy, screen);
1544         drw = drw_create(dpy, screen, root, sw, sh);
1545         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1546                 die("no fonts could be loaded.");
1547         lrpad = drw->fonts->h;
1548         bh = drw->fonts->h + 2;
1549         updategeom();
1550         /* init atoms */
1551         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1552         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1553         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1554         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1555         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1556         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1557         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1558         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1559         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1560         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1561         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1562         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1563         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1564         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1565         /* init cursors */
1566         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1567         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1568         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1569         /* init appearance */
1570         scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
1571         for (i = 0; i < LENGTH(colors); i++)
1572                 scheme[i] = drw_scm_create(drw, colors[i], 3);
1573         /* init bars */
1574         updatebars();
1575         updatestatus();
1576         /* supporting window for NetWMCheck */
1577         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1578         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1579                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1580         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1581                 PropModeReplace, (unsigned char *) "dwm", 3);
1582         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1583                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1584         /* EWMH support per view */
1585         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1586                 PropModeReplace, (unsigned char *) netatom, NetLast);
1587         XDeleteProperty(dpy, root, netatom[NetClientList]);
1588         /* select events */
1589         wa.cursor = cursor[CurNormal]->cursor;
1590         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1591                 |ButtonPressMask|PointerMotionMask|EnterWindowMask
1592                 |LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1593         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1594         XSelectInput(dpy, root, wa.event_mask);
1595         grabkeys();
1596         focus(NULL);
1597 }
1598
1599
1600 void
1601 seturgent(Client *c, int urg)
1602 {
1603         XWMHints *wmh;
1604
1605         c->isurgent = urg;
1606         if (!(wmh = XGetWMHints(dpy, c->win)))
1607                 return;
1608         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1609         XSetWMHints(dpy, c->win, wmh);
1610         XFree(wmh);
1611 }
1612
1613 void
1614 showhide(Client *c)
1615 {
1616         if (!c)
1617                 return;
1618         if (ISVISIBLE(c)) {
1619                 /* show clients top down */
1620                 XMoveWindow(dpy, c->win, c->x, c->y);
1621                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1622                         resize(c, c->x, c->y, c->w, c->h, 0);
1623                 showhide(c->snext);
1624         } else {
1625                 /* hide clients bottom up */
1626                 showhide(c->snext);
1627                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1628         }
1629 }
1630
1631 void
1632 sigchld(int unused)
1633 {
1634         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1635                 die("can't install SIGCHLD handler:");
1636         while (0 < waitpid(-1, NULL, WNOHANG));
1637 }
1638
1639 void
1640 spawn(const Arg *arg)
1641 {
1642         if (arg->v == dmenucmd)
1643                 dmenumon[0] = '0' + selmon->num;
1644         if (fork() == 0) {
1645                 if (dpy)
1646                         close(ConnectionNumber(dpy));
1647                 setsid();
1648                 execvp(((char **)arg->v)[0], (char **)arg->v);
1649                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1650                 perror(" failed");
1651                 exit(EXIT_SUCCESS);
1652         }
1653 }
1654
1655 void
1656 tag(const Arg *arg)
1657 {
1658         if (selmon->sel && arg->ui & TAGMASK) {
1659                 selmon->sel->tags = arg->ui & TAGMASK;
1660                 focus(NULL);
1661                 arrange(selmon);
1662         }
1663 }
1664
1665 void
1666 tagmon(const Arg *arg)
1667 {
1668         if (!selmon->sel || !mons->next)
1669                 return;
1670         sendmon(selmon->sel, dirtomon(arg->i));
1671 }
1672
1673 void
1674 tile(Monitor *m)
1675 {
1676         unsigned int i, n, h, mw, my, ty;
1677         Client *c;
1678
1679         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1680         if (n == 0)
1681                 return;
1682
1683         if (n > m->nmaster)
1684                 mw = m->nmaster ? m->ww * m->mfact : 0;
1685         else
1686                 mw = m->ww;
1687         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1688                 if (i < m->nmaster) {
1689                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1690                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1691                         my += HEIGHT(c);
1692                 } else {
1693                         h = (m->wh - ty) / (n - i);
1694                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1695                         ty += HEIGHT(c);
1696                 }
1697 }
1698
1699 void
1700 togglebar(const Arg *arg)
1701 {
1702         selmon->showbar = !selmon->showbar;
1703         updatebarpos(selmon);
1704         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1705         arrange(selmon);
1706 }
1707
1708 void
1709 togglefloating(const Arg *arg)
1710 {
1711         if (!selmon->sel)
1712                 return;
1713         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1714                 return;
1715         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1716         if (selmon->sel->isfloating)
1717                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1718                         selmon->sel->w, selmon->sel->h, 0);
1719         arrange(selmon);
1720 }
1721
1722 void
1723 toggletag(const Arg *arg)
1724 {
1725         unsigned int newtags;
1726
1727         if (!selmon->sel)
1728                 return;
1729         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1730         if (newtags) {
1731                 selmon->sel->tags = newtags;
1732                 focus(NULL);
1733                 arrange(selmon);
1734         }
1735 }
1736
1737 void
1738 toggleview(const Arg *arg)
1739 {
1740         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1741
1742         if (newtagset) {
1743                 selmon->tagset[selmon->seltags] = newtagset;
1744                 focus(NULL);
1745                 arrange(selmon);
1746         }
1747 }
1748
1749 void
1750 unfocus(Client *c, int setfocus)
1751 {
1752         if (!c)
1753                 return;
1754         grabbuttons(c, 0);
1755         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1756         if (setfocus) {
1757                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1758                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1759         }
1760 }
1761
1762 void
1763 unmanage(Client *c, int destroyed)
1764 {
1765         Monitor *m = c->mon;
1766         XWindowChanges wc;
1767
1768         detach(c);
1769         detachstack(c);
1770         if (!destroyed) {
1771                 wc.border_width = c->oldbw;
1772                 XGrabServer(dpy); /* avoid race conditions */
1773                 XSetErrorHandler(xerrordummy);
1774                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1775                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1776                 setclientstate(c, WithdrawnState);
1777                 XSync(dpy, False);
1778                 XSetErrorHandler(xerror);
1779                 XUngrabServer(dpy);
1780         }
1781         free(c);
1782         focus(NULL);
1783         updateclientlist();
1784         arrange(m);
1785 }
1786
1787 void
1788 unmapnotify(XEvent *e)
1789 {
1790         Client *c;
1791         XUnmapEvent *ev = &e->xunmap;
1792
1793         if ((c = wintoclient(ev->window))) {
1794                 if (ev->send_event)
1795                         setclientstate(c, WithdrawnState);
1796                 else
1797                         unmanage(c, 0);
1798         }
1799 }
1800
1801 void
1802 updatebars(void)
1803 {
1804         Monitor *m;
1805         XSetWindowAttributes wa = {
1806                 .override_redirect = True,
1807                 .background_pixmap = ParentRelative,
1808                 .event_mask = ButtonPressMask|ExposureMask
1809         };
1810         XClassHint ch = {"dwm", "dwm"};
1811         for (m = mons; m; m = m->next) {
1812                 if (m->barwin)
1813                         continue;
1814                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1815                                 CopyFromParent, DefaultVisual(dpy, screen),
1816                                 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1817                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1818                 XMapRaised(dpy, m->barwin);
1819                 XSetClassHint(dpy, m->barwin, &ch);
1820         }
1821 }
1822
1823 void
1824 updatebarpos(Monitor *m)
1825 {
1826         m->wy = m->my;
1827         m->wh = m->mh;
1828         if (m->showbar) {
1829                 m->wh -= bh;
1830                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1831                 m->wy = m->topbar ? m->wy + bh : m->wy;
1832         } else
1833                 m->by = -bh;
1834 }
1835
1836 void
1837 updateclientlist()
1838 {
1839         Client *c;
1840         Monitor *m;
1841
1842         XDeleteProperty(dpy, root, netatom[NetClientList]);
1843         for (m = mons; m; m = m->next)
1844                 for (c = m->clients; c; c = c->next)
1845                         XChangeProperty(dpy, root, netatom[NetClientList],
1846                                 XA_WINDOW, 32, PropModeAppend,
1847                                 (unsigned char *) &(c->win), 1);
1848 }
1849
1850 int
1851 updategeom(void)
1852 {
1853         int dirty = 0;
1854
1855 #ifdef XINERAMA
1856         if (XineramaIsActive(dpy)) {
1857                 int i, j, n, nn;
1858                 Client *c;
1859                 Monitor *m;
1860                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1861                 XineramaScreenInfo *unique = NULL;
1862
1863                 for (n = 0, m = mons; m; m = m->next, n++);
1864                 /* only consider unique geometries as separate screens */
1865                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1866                 for (i = 0, j = 0; i < nn; i++)
1867                         if (isuniquegeom(unique, j, &info[i]))
1868                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1869                 XFree(info);
1870                 nn = j;
1871                 if (n <= nn) { /* new monitors available */
1872                         for (i = 0; i < (nn - n); i++) {
1873                                 for (m = mons; m && m->next; m = m->next);
1874                                 if (m)
1875                                         m->next = createmon();
1876                                 else
1877                                         mons = createmon();
1878                         }
1879                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1880                                 if (i >= n
1881                                 || unique[i].x_org != m->mx || unique[i].y_org != m->my
1882                                 || unique[i].width != m->mw || unique[i].height != m->mh)
1883                                 {
1884                                         dirty = 1;
1885                                         m->num = i;
1886                                         m->mx = m->wx = unique[i].x_org;
1887                                         m->my = m->wy = unique[i].y_org;
1888                                         m->mw = m->ww = unique[i].width;
1889                                         m->mh = m->wh = unique[i].height;
1890                                         updatebarpos(m);
1891                                 }
1892                 } else { /* less monitors available nn < n */
1893                         for (i = nn; i < n; i++) {
1894                                 for (m = mons; m && m->next; m = m->next);
1895                                 while ((c = m->clients)) {
1896                                         dirty = 1;
1897                                         m->clients = c->next;
1898                                         detachstack(c);
1899                                         c->mon = mons;
1900                                         attach(c);
1901                                         attachstack(c);
1902                                 }
1903                                 if (m == selmon)
1904                                         selmon = mons;
1905                                 cleanupmon(m);
1906                         }
1907                 }
1908                 free(unique);
1909         } else
1910 #endif /* XINERAMA */
1911         { /* default monitor setup */
1912                 if (!mons)
1913                         mons = createmon();
1914                 if (mons->mw != sw || mons->mh != sh) {
1915                         dirty = 1;
1916                         mons->mw = mons->ww = sw;
1917                         mons->mh = mons->wh = sh;
1918                         updatebarpos(mons);
1919                 }
1920         }
1921         if (dirty) {
1922                 selmon = mons;
1923                 selmon = wintomon(root);
1924         }
1925         return dirty;
1926 }
1927
1928 void
1929 updatenumlockmask(void)
1930 {
1931         unsigned int i, j;
1932         XModifierKeymap *modmap;
1933
1934         numlockmask = 0;
1935         modmap = XGetModifierMapping(dpy);
1936         for (i = 0; i < 8; i++)
1937                 for (j = 0; j < modmap->max_keypermod; j++)
1938                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1939                                 == XKeysymToKeycode(dpy, XK_Num_Lock))
1940                                 numlockmask = (1 << i);
1941         XFreeModifiermap(modmap);
1942 }
1943
1944 void
1945 updatesizehints(Client *c)
1946 {
1947         long msize;
1948         XSizeHints size;
1949
1950         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1951                 /* size is uninitialized, ensure that size.flags aren't used */
1952                 size.flags = PSize;
1953         if (size.flags & PBaseSize) {
1954                 c->basew = size.base_width;
1955                 c->baseh = size.base_height;
1956         } else if (size.flags & PMinSize) {
1957                 c->basew = size.min_width;
1958                 c->baseh = size.min_height;
1959         } else
1960                 c->basew = c->baseh = 0;
1961         if (size.flags & PResizeInc) {
1962                 c->incw = size.width_inc;
1963                 c->inch = size.height_inc;
1964         } else
1965                 c->incw = c->inch = 0;
1966         if (size.flags & PMaxSize) {
1967                 c->maxw = size.max_width;
1968                 c->maxh = size.max_height;
1969         } else
1970                 c->maxw = c->maxh = 0;
1971         if (size.flags & PMinSize) {
1972                 c->minw = size.min_width;
1973                 c->minh = size.min_height;
1974         } else if (size.flags & PBaseSize) {
1975                 c->minw = size.base_width;
1976                 c->minh = size.base_height;
1977         } else
1978                 c->minw = c->minh = 0;
1979         if (size.flags & PAspect) {
1980                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1981                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1982         } else
1983                 c->maxa = c->mina = 0.0;
1984         c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
1985 }
1986
1987 void
1988 updatestatus(void)
1989 {
1990         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1991                 strcpy(stext, "dwm-"VERSION);
1992         drawbar(selmon);
1993 }
1994
1995 void
1996 updatetitle(Client *c)
1997 {
1998         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1999                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2000         if (c->name[0] == '\0') /* hack to mark broken clients */
2001                 strcpy(c->name, broken);
2002 }
2003
2004 void
2005 updatewindowtype(Client *c)
2006 {
2007         Atom state = getatomprop(c, netatom[NetWMState]);
2008         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2009
2010         if (state == netatom[NetWMFullscreen])
2011                 setfullscreen(c, 1);
2012         if (wtype == netatom[NetWMWindowTypeDialog])
2013                 c->isfloating = 1;
2014 }
2015
2016 void
2017 updatewmhints(Client *c)
2018 {
2019         XWMHints *wmh;
2020
2021         if ((wmh = XGetWMHints(dpy, c->win))) {
2022                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2023                         wmh->flags &= ~XUrgencyHint;
2024                         XSetWMHints(dpy, c->win, wmh);
2025                 } else
2026                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2027                 if (wmh->flags & InputHint)
2028                         c->neverfocus = !wmh->input;
2029                 else
2030                         c->neverfocus = 0;
2031                 XFree(wmh);
2032         }
2033 }
2034
2035 void
2036 view(const Arg *arg)
2037 {
2038         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2039                 return;
2040         selmon->seltags ^= 1; /* toggle sel tagset */
2041         if (arg->ui & TAGMASK)
2042                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2043         focus(NULL);
2044         arrange(selmon);
2045 }
2046
2047 Client *
2048 wintoclient(Window w)
2049 {
2050         Client *c;
2051         Monitor *m;
2052
2053         for (m = mons; m; m = m->next)
2054                 for (c = m->clients; c; c = c->next)
2055                         if (c->win == w)
2056                                 return c;
2057         return NULL;
2058 }
2059
2060 Monitor *
2061 wintomon(Window w)
2062 {
2063         int x, y;
2064         Client *c;
2065         Monitor *m;
2066
2067         if (w == root && getrootptr(&x, &y))
2068                 return recttomon(x, y, 1, 1);
2069         for (m = mons; m; m = m->next)
2070                 if (w == m->barwin)
2071                         return m;
2072         if ((c = wintoclient(w)))
2073                 return c->mon;
2074         return selmon;
2075 }
2076
2077 /* There's no way to check accesses to destroyed windows, thus those cases are
2078  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2079  * default error handler, which may call exit. */
2080 int
2081 xerror(Display *dpy, XErrorEvent *ee)
2082 {
2083         if (ee->error_code == BadWindow
2084         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2085         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2086         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2087         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2088         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2089         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2090         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2091         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2092                 return 0;
2093         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2094                 ee->request_code, ee->error_code);
2095         return xerrorxlib(dpy, ee); /* may call exit */
2096 }
2097
2098 int
2099 xerrordummy(Display *dpy, XErrorEvent *ee)
2100 {
2101         return 0;
2102 }
2103
2104 /* Startup Error handler to check if another window manager
2105  * is already running. */
2106 int
2107 xerrorstart(Display *dpy, XErrorEvent *ee)
2108 {
2109         die("dwm: another window manager is already running");
2110         return -1;
2111 }
2112
2113 void
2114 zoom(const Arg *arg)
2115 {
2116         Client *c = selmon->sel;
2117
2118         if (!selmon->lt[selmon->sellt]->arrange
2119         || (selmon->sel && selmon->sel->isfloating))
2120                 return;
2121         if (c == nexttiled(selmon->clients))
2122                 if (!c || !(c = nexttiled(c->next)))
2123                         return;
2124         pop(c);
2125 }
2126
2127 int
2128 main(int argc, char *argv[])
2129 {
2130         if (argc == 2 && !strcmp("-v", argv[1]))
2131                 die("dwm-"VERSION);
2132         else if (argc != 1)
2133                 die("usage: dwm [-v]");
2134         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2135                 fputs("warning: no locale support\n", stderr);
2136         if (!(dpy = XOpenDisplay(NULL)))
2137                 die("dwm: cannot open display");
2138         checkotherwm();
2139         setup();
2140         scan();
2141         run();
2142         cleanup();
2143         XCloseDisplay(dpy);
2144         return EXIT_SUCCESS;
2145 }