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 Atom getatomprop(Client *c, Atom prop);
 173 static int getrootptr(int *x, int *y);
 174 static long getstate(Window w);
 175 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 176 static void grabbuttons(Client *c, int focused);
 177 static void grabkeys(void);
 178 static void incnmaster(const Arg *arg);
 179 static void keypress(XEvent *e);
 180 static void killclient(const Arg *arg);
 181 static void manage(Window w, XWindowAttributes *wa);
 182 static void mappingnotify(XEvent *e);
 183 static void maprequest(XEvent *e);
 184 static void monocle(Monitor *m);
 185 static void motionnotify(XEvent *e);
 186 static void movemouse(const Arg *arg);
 187 static Client *nexttiled(Client *c);
 188 static void pop(Client *);
 189 static void propertynotify(XEvent *e);
 190 static void quit(const Arg *arg);
 191 static Monitor *recttomon(int x, int y, int w, int h);
 192 static void resize(Client *c, int x, int y, int w, int h, int interact);
 193 static void resizeclient(Client *c, int x, int y, int w, int h);
 194 static void resizemouse(const Arg *arg);
 195 static void restack(Monitor *m);
 196 static void run(void);
 197 static void scan(void);
 198 static int sendevent(Client *c, Atom proto);
 199 static void sendmon(Client *c, Monitor *m);
 200 static void setclientstate(Client *c, long state);
 201 static void setfocus(Client *c);
 202 static void setfullscreen(Client *c, int fullscreen);
 203 static void setlayout(const Arg *arg);
 204 static void setmfact(const Arg *arg);
 205 static void setup(void);
 206 static void seturgent(Client *c, int urg);
 207 static void showhide(Client *c);
 208 static void sigchld(int unused);
 209 static void spawn(const Arg *arg);
 210 static void tag(const Arg *arg);
 211 static void tagmon(const Arg *arg);
 212 static void tile(Monitor *);
 213 static void togglebar(const Arg *arg);
 214 static void togglefloating(const Arg *arg);
 215 static void toggletag(const Arg *arg);
 216 static void toggleview(const Arg *arg);
 217 static void unfocus(Client *c, int setfocus);
 218 static void unmanage(Client *c, int destroyed);
 219 static void unmapnotify(XEvent *e);
 220 static void updatebarpos(Monitor *m);
 221 static void updatebars(void);
 222 static void updateclientlist(void);
 223 static int updategeom(void);
 224 static void updatenumlockmask(void);
 225 static void updatesizehints(Client *c);
 226 static void updatestatus(void);
 227 static void updatetitle(Client *c);
 228 static void updatewindowtype(Client *c);
 229 static void updatewmhints(Client *c);
 230 static void view(const Arg *arg);
 231 static Client *wintoclient(Window w);
 232 static Monitor *wintomon(Window w);
 233 static int xerror(Display *dpy, XErrorEvent *ee);
 234 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 235 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 236 static void zoom(const Arg *arg);
 237
 238 /* variables */
 239 static const char broken[] = "broken";
 240 static char stext[256];
 241 static int screen;
 242 static int sw, sh;           /* X display screen geometry width, height */
 243 static int bh, blw = 0;      /* bar geometry */
 244 static int lrpad;            /* sum of left and right padding for text */
 245 static int (*xerrorxlib)(Display *, XErrorEvent *);
 246 static unsigned int numlockmask = 0;
 247 static void (*handler[LASTEvent]) (XEvent *) = {
 248         [ButtonPress] = buttonpress,
 249         [ClientMessage] = clientmessage,
 250         [ConfigureRequest] = configurerequest,
 251         [ConfigureNotify] = configurenotify,
 252         [DestroyNotify] = destroynotify,
 253         [EnterNotify] = enternotify,
 254         [Expose] = expose,
 255         [FocusIn] = focusin,
 256         [KeyPress] = keypress,
 257         [MappingNotify] = mappingnotify,
 258         [MapRequest] = maprequest,
 259         [MotionNotify] = motionnotify,
 260         [PropertyNotify] = propertynotify,
 261         [UnmapNotify] = unmapnotify
 262 };
 263 static Atom wmatom[WMLast], netatom[NetLast];
 264 static int running = 1;
 265 static Cur *cursor[CurLast];
 266 static Clr **scheme;
 267 static Display *dpy;
 268 static Drw *drw;
 269 static Monitor *mons, *selmon;
 270 static Window root, wmcheckwin;
 271
 272 /* configuration, allows nested code to access above variables */
 273 #include "config.h"
 274
 275 /* compile-time check if all tags fit into an unsigned int bit array. */
 276 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 277
 278 /* function implementations */
 279 void
 280 applyrules(Client *c)
 281 {
 282         const char *class, *instance;
 283         unsigned int i;
 284         const Rule *r;
 285         Monitor *m;
 286         XClassHint ch = { NULL, NULL };
 287
 288         /* rule matching */
 289         c->isfloating = 0;
 290         c->tags = 0;
 291         XGetClassHint(dpy, c->win, &ch);
 292         class    = ch.res_class ? ch.res_class : broken;
 293         instance = ch.res_name  ? ch.res_name  : broken;
 294
 295         for (i = 0; i < LENGTH(rules); i++) {
 296                 r = &rules[i];
 297                 if ((!r->title || strstr(c->name, r->title))
 298                 && (!r->class || strstr(class, r->class))
 299                 && (!r->instance || strstr(instance, r->instance)))
 300                 {
 301                         c->isfloating = r->isfloating;
 302                         c->tags |= r->tags;
 303                         for (m = mons; m && m->num != r->monitor; m = m->next);
 304                         if (m)
 305                                 c->mon = m;
 306                 }
 307         }
 308         if (ch.res_class)
 309                 XFree(ch.res_class);
 310         if (ch.res_name)
 311                 XFree(ch.res_name);
 312         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 313 }
 314
 315 int
 316 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 317 {
 318         int baseismin;
 319         Monitor *m = c->mon;
 320
 321         /* set minimum possible */
 322         *w = MAX(1, *w);
 323         *h = MAX(1, *h);
 324         if (interact) {
 325                 if (*x > sw)
 326                         *x = sw - WIDTH(c);
 327                 if (*y > sh)
 328                         *y = sh - HEIGHT(c);
 329                 if (*x + *w + 2 * c->bw < 0)
 330                         *x = 0;
 331                 if (*y + *h + 2 * c->bw < 0)
 332                         *y = 0;
 333         } else {
 334                 if (*x >= m->wx + m->ww)
 335                         *x = m->wx + m->ww - WIDTH(c);
 336                 if (*y >= m->wy + m->wh)
 337                         *y = m->wy + m->wh - HEIGHT(c);
 338                 if (*x + *w + 2 * c->bw <= m->wx)
 339                         *x = m->wx;
 340                 if (*y + *h + 2 * c->bw <= m->wy)
 341                         *y = m->wy;
 342         }
 343         if (*h < bh)
 344                 *h = bh;
 345         if (*w < bh)
 346                 *w = bh;
 347         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 348                 /* see last two sentences in ICCCM 4.1.2.3 */
 349                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 350                 if (!baseismin) { /* temporarily remove base dimensions */
 351                         *w -= c->basew;
 352                         *h -= c->baseh;
 353                 }
 354                 /* adjust for aspect limits */
 355                 if (c->mina > 0 && c->maxa > 0) {
 356                         if (c->maxa < (float)*w / *h)
 357                                 *w = *h * c->maxa + 0.5;
 358                         else if (c->mina < (float)*h / *w)
 359                                 *h = *w * c->mina + 0.5;
 360                 }
 361                 if (baseismin) { /* increment calculation requires this */
 362                         *w -= c->basew;
 363                         *h -= c->baseh;
 364                 }
 365                 /* adjust for increment value */
 366                 if (c->incw)
 367                         *w -= *w % c->incw;
 368                 if (c->inch)
 369                         *h -= *h % c->inch;
 370                 /* restore base dimensions */
 371                 *w = MAX(*w + c->basew, c->minw);
 372                 *h = MAX(*h + c->baseh, c->minh);
 373                 if (c->maxw)
 374                         *w = MIN(*w, c->maxw);
 375                 if (c->maxh)
 376                         *h = MIN(*h, c->maxh);
 377         }
 378         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 379 }
 380
 381 void
 382 arrange(Monitor *m)
 383 {
 384         if (m)
 385                 showhide(m->stack);
 386         else for (m = mons; m; m = m->next)
 387                 showhide(m->stack);
 388         if (m) {
 389                 arrangemon(m);
 390                 restack(m);
 391         } else for (m = mons; m; m = m->next)
 392                 arrangemon(m);
 393 }
 394
 395 void
 396 arrangemon(Monitor *m)
 397 {
 398         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 399         if (m->lt[m->sellt]->arrange)
 400                 m->lt[m->sellt]->arrange(m);
 401 }
 402
 403 void
 404 attach(Client *c)
 405 {
 406         c->next = c->mon->clients;
 407         c->mon->clients = c;
 408 }
 409
 410 void
 411 attachstack(Client *c)
 412 {
 413         c->snext = c->mon->stack;
 414         c->mon->stack = c;
 415 }
 416
 417 void
 418 buttonpress(XEvent *e)
 419 {
 420         unsigned int i, x, click;
 421         Arg arg = {0};
 422         Client *c;
 423         Monitor *m;
 424         XButtonPressedEvent *ev = &e->xbutton;
 425
 426         click = ClkRootWin;
 427         /* focus monitor if necessary */
 428         if ((m = wintomon(ev->window)) && m != selmon) {
 429                 unfocus(selmon->sel, 1);
 430                 selmon = m;
 431                 focus(NULL);
 432         }
 433         if (ev->window == selmon->barwin) {
 434                 i = x = 0;
 435                 do
 436                         x += TEXTW(tags[i]);
 437                 while (ev->x >= x && ++i < LENGTH(tags));
 438                 if (i < LENGTH(tags)) {
 439                         click = ClkTagBar;
 440                         arg.ui = 1 << i;
 441                 } else if (ev->x < x + blw)
 442                         click = ClkLtSymbol;
 443                 else if (ev->x > selmon->ww - (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 = blw = 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 {
 922                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 923                         strncpy(text, *list, size - 1);
 924                         XFreeStringList(list);
 925                 }
 926         }
 927         text[size - 1] = '\0';
 928         XFree(name.value);
 929         return 1;
 930 }
 931
 932 void
 933 grabbuttons(Client *c, int focused)
 934 {
 935         updatenumlockmask();
 936         {
 937                 unsigned int i, j;
 938                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 939                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 940                 if (!focused)
 941                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 942                                 BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
 943                 for (i = 0; i < LENGTH(buttons); i++)
 944                         if (buttons[i].click == ClkClientWin)
 945                                 for (j = 0; j < LENGTH(modifiers); j++)
 946                                         XGrabButton(dpy, buttons[i].button,
 947                                                 buttons[i].mask | modifiers[j],
 948                                                 c->win, False, BUTTONMASK,
 949                                                 GrabModeAsync, GrabModeSync, None, None);
 950         }
 951 }
 952
 953 void
 954 grabkeys(void)
 955 {
 956         updatenumlockmask();
 957         {
 958                 unsigned int i, j;
 959                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 960                 KeyCode code;
 961
 962                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 963                 for (i = 0; i < LENGTH(keys); i++)
 964                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 965                                 for (j = 0; j < LENGTH(modifiers); j++)
 966                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 967                                                 True, GrabModeAsync, GrabModeAsync);
 968         }
 969 }
 970
 971 void
 972 incnmaster(const Arg *arg)
 973 {
 974         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 975         arrange(selmon);
 976 }
 977
 978 #ifdef XINERAMA
 979 static int
 980 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 981 {
 982         while (n--)
 983                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 984                 && unique[n].width == info->width && unique[n].height == info->height)
 985                         return 0;
 986         return 1;
 987 }
 988 #endif /* XINERAMA */
 989
 990 void
 991 keypress(XEvent *e)
 992 {
 993         unsigned int i;
 994         KeySym keysym;
 995         XKeyEvent *ev;
 996
 997         ev = &e->xkey;
 998         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 999         for (i = 0; i < LENGTH(keys); i++)
1000                 if (keysym == keys[i].keysym
1001                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1002                 && keys[i].func)
1003                         keys[i].func(&(keys[i].arg));
1004 }
1005
1006 void
1007 killclient(const Arg *arg)
1008 {
1009         if (!selmon->sel)
1010                 return;
1011         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1012                 XGrabServer(dpy);
1013                 XSetErrorHandler(xerrordummy);
1014                 XSetCloseDownMode(dpy, DestroyAll);
1015                 XKillClient(dpy, selmon->sel->win);
1016                 XSync(dpy, False);
1017                 XSetErrorHandler(xerror);
1018                 XUngrabServer(dpy);
1019         }
1020 }
1021
1022 void
1023 manage(Window w, XWindowAttributes *wa)
1024 {
1025         Client *c, *t = NULL;
1026         Window trans = None;
1027         XWindowChanges wc;
1028
1029         c = ecalloc(1, sizeof(Client));
1030         c->win = w;
1031         /* geometry */
1032         c->x = c->oldx = wa->x;
1033         c->y = c->oldy = wa->y;
1034         c->w = c->oldw = wa->width;
1035         c->h = c->oldh = wa->height;
1036         c->oldbw = wa->border_width;
1037
1038         updatetitle(c);
1039         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1040                 c->mon = t->mon;
1041                 c->tags = t->tags;
1042         } else {
1043                 c->mon = selmon;
1044                 applyrules(c);
1045         }
1046
1047         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1048                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1049         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1050                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1051         c->x = MAX(c->x, c->mon->mx);
1052         /* only fix client y-offset, if the client center might cover the bar */
1053         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1054                 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1055         c->bw = borderpx;
1056
1057         wc.border_width = c->bw;
1058         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1059         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1060         configure(c); /* propagates border_width, if size doesn't change */
1061         updatewindowtype(c);
1062         updatesizehints(c);
1063         updatewmhints(c);
1064         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1065         grabbuttons(c, 0);
1066         if (!c->isfloating)
1067                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1068         if (c->isfloating)
1069                 XRaiseWindow(dpy, c->win);
1070         attach(c);
1071         attachstack(c);
1072         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1073                 (unsigned char *) &(c->win), 1);
1074         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1075         setclientstate(c, NormalState);
1076         if (c->mon == selmon)
1077                 unfocus(selmon->sel, 0);
1078         c->mon->sel = c;
1079         arrange(c->mon);
1080         XMapWindow(dpy, c->win);
1081         focus(NULL);
1082 }
1083
1084 void
1085 mappingnotify(XEvent *e)
1086 {
1087         XMappingEvent *ev = &e->xmapping;
1088
1089         XRefreshKeyboardMapping(ev);
1090         if (ev->request == MappingKeyboard)
1091                 grabkeys();
1092 }
1093
1094 void
1095 maprequest(XEvent *e)
1096 {
1097         static XWindowAttributes wa;
1098         XMapRequestEvent *ev = &e->xmaprequest;
1099
1100         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1101                 return;
1102         if (wa.override_redirect)
1103                 return;
1104         if (!wintoclient(ev->window))
1105                 manage(ev->window, &wa);
1106 }
1107
1108 void
1109 monocle(Monitor *m)
1110 {
1111         unsigned int n = 0;
1112         Client *c;
1113
1114         for (c = m->clients; c; c = c->next)
1115                 if (ISVISIBLE(c))
1116                         n++;
1117         if (n > 0) /* override layout symbol */
1118                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1119         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1120                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1121 }
1122
1123 void
1124 motionnotify(XEvent *e)
1125 {
1126         static Monitor *mon = NULL;
1127         Monitor *m;
1128         XMotionEvent *ev = &e->xmotion;
1129
1130         if (ev->window != root)
1131                 return;
1132         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1133                 unfocus(selmon->sel, 1);
1134                 selmon = m;
1135                 focus(NULL);
1136         }
1137         mon = m;
1138 }
1139
1140 void
1141 movemouse(const Arg *arg)
1142 {
1143         int x, y, ocx, ocy, nx, ny;
1144         Client *c;
1145         Monitor *m;
1146         XEvent ev;
1147         Time lasttime = 0;
1148
1149         if (!(c = selmon->sel))
1150                 return;
1151         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1152                 return;
1153         restack(selmon);
1154         ocx = c->x;
1155         ocy = c->y;
1156         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1157                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1158                 return;
1159         if (!getrootptr(&x, &y))
1160                 return;
1161         do {
1162                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1163                 switch(ev.type) {
1164                 case ConfigureRequest:
1165                 case Expose:
1166                 case MapRequest:
1167                         handler[ev.type](&ev);
1168                         break;
1169                 case MotionNotify:
1170                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1171                                 continue;
1172                         lasttime = ev.xmotion.time;
1173
1174                         nx = ocx + (ev.xmotion.x - x);
1175                         ny = ocy + (ev.xmotion.y - y);
1176                         if (abs(selmon->wx - nx) < snap)
1177                                 nx = selmon->wx;
1178                         else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1179                                 nx = selmon->wx + selmon->ww - WIDTH(c);
1180                         if (abs(selmon->wy - ny) < snap)
1181                                 ny = selmon->wy;
1182                         else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1183                                 ny = selmon->wy + selmon->wh - HEIGHT(c);
1184                         if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1185                         && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1186                                 togglefloating(NULL);
1187                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1188                                 resize(c, nx, ny, c->w, c->h, 1);
1189                         break;
1190                 }
1191         } while (ev.type != ButtonRelease);
1192         XUngrabPointer(dpy, CurrentTime);
1193         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1194                 sendmon(c, m);
1195                 selmon = m;
1196                 focus(NULL);
1197         }
1198 }
1199
1200 Client *
1201 nexttiled(Client *c)
1202 {
1203         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1204         return c;
1205 }
1206
1207 void
1208 pop(Client *c)
1209 {
1210         detach(c);
1211         attach(c);
1212         focus(c);
1213         arrange(c->mon);
1214 }
1215
1216 void
1217 propertynotify(XEvent *e)
1218 {
1219         Client *c;
1220         Window trans;
1221         XPropertyEvent *ev = &e->xproperty;
1222
1223         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1224                 updatestatus();
1225         else if (ev->state == PropertyDelete)
1226                 return; /* ignore */
1227         else if ((c = wintoclient(ev->window))) {
1228                 switch(ev->atom) {
1229                 default: break;
1230                 case XA_WM_TRANSIENT_FOR:
1231                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1232                                 (c->isfloating = (wintoclient(trans)) != NULL))
1233                                 arrange(c->mon);
1234                         break;
1235                 case XA_WM_NORMAL_HINTS:
1236                         updatesizehints(c);
1237                         break;
1238                 case XA_WM_HINTS:
1239                         updatewmhints(c);
1240                         drawbars();
1241                         break;
1242                 }
1243                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1244                         updatetitle(c);
1245                         if (c == c->mon->sel)
1246                                 drawbar(c->mon);
1247                 }
1248                 if (ev->atom == netatom[NetWMWindowType])
1249                         updatewindowtype(c);
1250         }
1251 }
1252
1253 void
1254 quit(const Arg *arg)
1255 {
1256         running = 0;
1257 }
1258
1259 Monitor *
1260 recttomon(int x, int y, int w, int h)
1261 {
1262         Monitor *m, *r = selmon;
1263         int a, area = 0;
1264
1265         for (m = mons; m; m = m->next)
1266                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1267                         area = a;
1268                         r = m;
1269                 }
1270         return r;
1271 }
1272
1273 void
1274 resize(Client *c, int x, int y, int w, int h, int interact)
1275 {
1276         if (applysizehints(c, &x, &y, &w, &h, interact))
1277                 resizeclient(c, x, y, w, h);
1278 }
1279
1280 void
1281 resizeclient(Client *c, int x, int y, int w, int h)
1282 {
1283         XWindowChanges wc;
1284
1285         c->oldx = c->x; c->x = wc.x = x;
1286         c->oldy = c->y; c->y = wc.y = y;
1287         c->oldw = c->w; c->w = wc.width = w;
1288         c->oldh = c->h; c->h = wc.height = h;
1289         wc.border_width = c->bw;
1290         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1291         configure(c);
1292         XSync(dpy, False);
1293 }
1294
1295 void
1296 resizemouse(const Arg *arg)
1297 {
1298         int ocx, ocy, nw, nh;
1299         Client *c;
1300         Monitor *m;
1301         XEvent ev;
1302         Time lasttime = 0;
1303
1304         if (!(c = selmon->sel))
1305                 return;
1306         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1307                 return;
1308         restack(selmon);
1309         ocx = c->x;
1310         ocy = c->y;
1311         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1312                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1313                 return;
1314         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1315         do {
1316                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1317                 switch(ev.type) {
1318                 case ConfigureRequest:
1319                 case Expose:
1320                 case MapRequest:
1321                         handler[ev.type](&ev);
1322                         break;
1323                 case MotionNotify:
1324                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1325                                 continue;
1326                         lasttime = ev.xmotion.time;
1327
1328                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1329                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1330                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1331                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1332                         {
1333                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1334                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1335                                         togglefloating(NULL);
1336                         }
1337                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1338                                 resize(c, c->x, c->y, nw, nh, 1);
1339                         break;
1340                 }
1341         } while (ev.type != ButtonRelease);
1342         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1343         XUngrabPointer(dpy, CurrentTime);
1344         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1345         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1346                 sendmon(c, m);
1347                 selmon = m;
1348                 focus(NULL);
1349         }
1350 }
1351
1352 void
1353 restack(Monitor *m)
1354 {
1355         Client *c;
1356         XEvent ev;
1357         XWindowChanges wc;
1358
1359         drawbar(m);
1360         if (!m->sel)
1361                 return;
1362         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1363                 XRaiseWindow(dpy, m->sel->win);
1364         if (m->lt[m->sellt]->arrange) {
1365                 wc.stack_mode = Below;
1366                 wc.sibling = m->barwin;
1367                 for (c = m->stack; c; c = c->snext)
1368                         if (!c->isfloating && ISVISIBLE(c)) {
1369                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1370                                 wc.sibling = c->win;
1371                         }
1372         }
1373         XSync(dpy, False);
1374         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1375 }
1376
1377 void
1378 run(void)
1379 {
1380         XEvent ev;
1381         /* main event loop */
1382         XSync(dpy, False);
1383         while (running && !XNextEvent(dpy, &ev))
1384                 if (handler[ev.type])
1385                         handler[ev.type](&ev); /* call handler */
1386 }
1387
1388 void
1389 scan(void)
1390 {
1391         unsigned int i, num;
1392         Window d1, d2, *wins = NULL;
1393         XWindowAttributes wa;
1394
1395         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1396                 for (i = 0; i < num; i++) {
1397                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1398                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1399                                 continue;
1400                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1401                                 manage(wins[i], &wa);
1402                 }
1403                 for (i = 0; i < num; i++) { /* now the transients */
1404                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1405                                 continue;
1406                         if (XGetTransientForHint(dpy, wins[i], &d1)
1407                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1408                                 manage(wins[i], &wa);
1409                 }
1410                 if (wins)
1411                         XFree(wins);
1412         }
1413 }
1414
1415 void
1416 sendmon(Client *c, Monitor *m)
1417 {
1418         if (c->mon == m)
1419                 return;
1420         unfocus(c, 1);
1421         detach(c);
1422         detachstack(c);
1423         c->mon = m;
1424         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1425         attach(c);
1426         attachstack(c);
1427         focus(NULL);
1428         arrange(NULL);
1429 }
1430
1431 void
1432 setclientstate(Client *c, long state)
1433 {
1434         long data[] = { state, None };
1435
1436         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1437                 PropModeReplace, (unsigned char *)data, 2);
1438 }
1439
1440 int
1441 sendevent(Client *c, Atom proto)
1442 {
1443         int n;
1444         Atom *protocols;
1445         int exists = 0;
1446         XEvent ev;
1447
1448         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1449                 while (!exists && n--)
1450                         exists = protocols[n] == proto;
1451                 XFree(protocols);
1452         }
1453         if (exists) {
1454                 ev.type = ClientMessage;
1455                 ev.xclient.window = c->win;
1456                 ev.xclient.message_type = wmatom[WMProtocols];
1457                 ev.xclient.format = 32;
1458                 ev.xclient.data.l[0] = proto;
1459                 ev.xclient.data.l[1] = CurrentTime;
1460                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1461         }
1462         return exists;
1463 }
1464
1465 void
1466 setfocus(Client *c)
1467 {
1468         if (!c->neverfocus) {
1469                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1470                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1471                         XA_WINDOW, 32, PropModeReplace,
1472                         (unsigned char *) &(c->win), 1);
1473         }
1474         sendevent(c, wmatom[WMTakeFocus]);
1475 }
1476
1477 void
1478 setfullscreen(Client *c, int fullscreen)
1479 {
1480         if (fullscreen && !c->isfullscreen) {
1481                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1482                         PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1483                 c->isfullscreen = 1;
1484                 c->oldstate = c->isfloating;
1485                 c->oldbw = c->bw;
1486                 c->bw = 0;
1487                 c->isfloating = 1;
1488                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1489                 XRaiseWindow(dpy, c->win);
1490         } else if (!fullscreen && c->isfullscreen){
1491                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1492                         PropModeReplace, (unsigned char*)0, 0);
1493                 c->isfullscreen = 0;
1494                 c->isfloating = c->oldstate;
1495                 c->bw = c->oldbw;
1496                 c->x = c->oldx;
1497                 c->y = c->oldy;
1498                 c->w = c->oldw;
1499                 c->h = c->oldh;
1500                 resizeclient(c, c->x, c->y, c->w, c->h);
1501                 arrange(c->mon);
1502         }
1503 }
1504
1505 void
1506 setlayout(const Arg *arg)
1507 {
1508         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1509                 selmon->sellt ^= 1;
1510         if (arg && arg->v)
1511                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1512         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1513         if (selmon->sel)
1514                 arrange(selmon);
1515         else
1516                 drawbar(selmon);
1517 }
1518
1519 /* arg > 1.0 will set mfact absolutely */
1520 void
1521 setmfact(const Arg *arg)
1522 {
1523         float f;
1524
1525         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1526                 return;
1527         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1528         if (f < 0.05 || f > 0.95)
1529                 return;
1530         selmon->mfact = f;
1531         arrange(selmon);
1532 }
1533
1534 void
1535 setup(void)
1536 {
1537         int i;
1538         XSetWindowAttributes wa;
1539         Atom utf8string;
1540
1541         /* clean up any zombies immediately */
1542         sigchld(0);
1543
1544         /* init screen */
1545         screen = DefaultScreen(dpy);
1546         sw = DisplayWidth(dpy, screen);
1547         sh = DisplayHeight(dpy, screen);
1548         root = RootWindow(dpy, screen);
1549         drw = drw_create(dpy, screen, root, sw, sh);
1550         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1551                 die("no fonts could be loaded.");
1552         lrpad = drw->fonts->h;
1553         bh = drw->fonts->h + 2;
1554         updategeom();
1555         /* init atoms */
1556         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1557         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1558         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1559         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1560         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1561         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1562         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1563         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1564         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1565         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1566         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1567         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1568         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1569         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1570         /* init cursors */
1571         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1572         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1573         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1574         /* init appearance */
1575         scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
1576         for (i = 0; i < LENGTH(colors); i++)
1577                 scheme[i] = drw_scm_create(drw, colors[i], 3);
1578         /* init bars */
1579         updatebars();
1580         updatestatus();
1581         /* supporting window for NetWMCheck */
1582         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1583         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1584                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1585         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1586                 PropModeReplace, (unsigned char *) "dwm", 3);
1587         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1588                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1589         /* EWMH support per view */
1590         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1591                 PropModeReplace, (unsigned char *) netatom, NetLast);
1592         XDeleteProperty(dpy, root, netatom[NetClientList]);
1593         /* select events */
1594         wa.cursor = cursor[CurNormal]->cursor;
1595         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1596                 |ButtonPressMask|PointerMotionMask|EnterWindowMask
1597                 |LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1598         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1599         XSelectInput(dpy, root, wa.event_mask);
1600         grabkeys();
1601         focus(NULL);
1602 }
1603
1604
1605 void
1606 seturgent(Client *c, int urg)
1607 {
1608         XWMHints *wmh;
1609
1610         c->isurgent = urg;
1611         if (!(wmh = XGetWMHints(dpy, c->win)))
1612                 return;
1613         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1614         XSetWMHints(dpy, c->win, wmh);
1615         XFree(wmh);
1616 }
1617
1618 void
1619 showhide(Client *c)
1620 {
1621         if (!c)
1622                 return;
1623         if (ISVISIBLE(c)) {
1624                 /* show clients top down */
1625                 XMoveWindow(dpy, c->win, c->x, c->y);
1626                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1627                         resize(c, c->x, c->y, c->w, c->h, 0);
1628                 showhide(c->snext);
1629         } else {
1630                 /* hide clients bottom up */
1631                 showhide(c->snext);
1632                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1633         }
1634 }
1635
1636 void
1637 sigchld(int unused)
1638 {
1639         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1640                 die("can't install SIGCHLD handler:");
1641         while (0 < waitpid(-1, NULL, WNOHANG));
1642 }
1643
1644 void
1645 spawn(const Arg *arg)
1646 {
1647         if (arg->v == dmenucmd)
1648                 dmenumon[0] = '0' + selmon->num;
1649         if (fork() == 0) {
1650                 if (dpy)
1651                         close(ConnectionNumber(dpy));
1652                 setsid();
1653                 execvp(((char **)arg->v)[0], (char **)arg->v);
1654                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1655                 perror(" failed");
1656                 exit(EXIT_SUCCESS);
1657         }
1658 }
1659
1660 void
1661 tag(const Arg *arg)
1662 {
1663         if (selmon->sel && arg->ui & TAGMASK) {
1664                 selmon->sel->tags = arg->ui & TAGMASK;
1665                 focus(NULL);
1666                 arrange(selmon);
1667         }
1668 }
1669
1670 void
1671 tagmon(const Arg *arg)
1672 {
1673         if (!selmon->sel || !mons->next)
1674                 return;
1675         sendmon(selmon->sel, dirtomon(arg->i));
1676 }
1677
1678 void
1679 tile(Monitor *m)
1680 {
1681         unsigned int i, n, h, mw, my, ty;
1682         Client *c;
1683
1684         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1685         if (n == 0)
1686                 return;
1687
1688         if (n > m->nmaster)
1689                 mw = m->nmaster ? m->ww * m->mfact : 0;
1690         else
1691                 mw = m->ww;
1692         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1693                 if (i < m->nmaster) {
1694                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1695                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1696                         if (my + HEIGHT(c) < m->wh)
1697                                 my += HEIGHT(c);
1698                 } else {
1699                         h = (m->wh - ty) / (n - i);
1700                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1701                         if (ty + HEIGHT(c) < m->wh)
1702                                 ty += HEIGHT(c);
1703                 }
1704 }
1705
1706 void
1707 togglebar(const Arg *arg)
1708 {
1709         selmon->showbar = !selmon->showbar;
1710         updatebarpos(selmon);
1711         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1712         arrange(selmon);
1713 }
1714
1715 void
1716 togglefloating(const Arg *arg)
1717 {
1718         if (!selmon->sel)
1719                 return;
1720         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1721                 return;
1722         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1723         if (selmon->sel->isfloating)
1724                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1725                         selmon->sel->w, selmon->sel->h, 0);
1726         arrange(selmon);
1727 }
1728
1729 void
1730 toggletag(const Arg *arg)
1731 {
1732         unsigned int newtags;
1733
1734         if (!selmon->sel)
1735                 return;
1736         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1737         if (newtags) {
1738                 selmon->sel->tags = newtags;
1739                 focus(NULL);
1740                 arrange(selmon);
1741         }
1742 }
1743
1744 void
1745 toggleview(const Arg *arg)
1746 {
1747         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1748
1749         if (newtagset) {
1750                 selmon->tagset[selmon->seltags] = newtagset;
1751                 focus(NULL);
1752                 arrange(selmon);
1753         }
1754 }
1755
1756 void
1757 unfocus(Client *c, int setfocus)
1758 {
1759         if (!c)
1760                 return;
1761         grabbuttons(c, 0);
1762         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1763         if (setfocus) {
1764                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1765                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1766         }
1767 }
1768
1769 void
1770 unmanage(Client *c, int destroyed)
1771 {
1772         Monitor *m = c->mon;
1773         XWindowChanges wc;
1774
1775         detach(c);
1776         detachstack(c);
1777         if (!destroyed) {
1778                 wc.border_width = c->oldbw;
1779                 XGrabServer(dpy); /* avoid race conditions */
1780                 XSetErrorHandler(xerrordummy);
1781                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1782                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1783                 setclientstate(c, WithdrawnState);
1784                 XSync(dpy, False);
1785                 XSetErrorHandler(xerror);
1786                 XUngrabServer(dpy);
1787         }
1788         free(c);
1789         focus(NULL);
1790         updateclientlist();
1791         arrange(m);
1792 }
1793
1794 void
1795 unmapnotify(XEvent *e)
1796 {
1797         Client *c;
1798         XUnmapEvent *ev = &e->xunmap;
1799
1800         if ((c = wintoclient(ev->window))) {
1801                 if (ev->send_event)
1802                         setclientstate(c, WithdrawnState);
1803                 else
1804                         unmanage(c, 0);
1805         }
1806 }
1807
1808 void
1809 updatebars(void)
1810 {
1811         Monitor *m;
1812         XSetWindowAttributes wa = {
1813                 .override_redirect = True,
1814                 .background_pixmap = ParentRelative,
1815                 .event_mask = ButtonPressMask|ExposureMask
1816         };
1817         XClassHint ch = {"dwm", "dwm"};
1818         for (m = mons; m; m = m->next) {
1819                 if (m->barwin)
1820                         continue;
1821                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1822                                 CopyFromParent, DefaultVisual(dpy, screen),
1823                                 CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1824                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1825                 XMapRaised(dpy, m->barwin);
1826                 XSetClassHint(dpy, m->barwin, &ch);
1827         }
1828 }
1829
1830 void
1831 updatebarpos(Monitor *m)
1832 {
1833         m->wy = m->my;
1834         m->wh = m->mh;
1835         if (m->showbar) {
1836                 m->wh -= bh;
1837                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1838                 m->wy = m->topbar ? m->wy + bh : m->wy;
1839         } else
1840                 m->by = -bh;
1841 }
1842
1843 void
1844 updateclientlist()
1845 {
1846         Client *c;
1847         Monitor *m;
1848
1849         XDeleteProperty(dpy, root, netatom[NetClientList]);
1850         for (m = mons; m; m = m->next)
1851                 for (c = m->clients; c; c = c->next)
1852                         XChangeProperty(dpy, root, netatom[NetClientList],
1853                                 XA_WINDOW, 32, PropModeAppend,
1854                                 (unsigned char *) &(c->win), 1);
1855 }
1856
1857 int
1858 updategeom(void)
1859 {
1860         int dirty = 0;
1861
1862 #ifdef XINERAMA
1863         if (XineramaIsActive(dpy)) {
1864                 int i, j, n, nn;
1865                 Client *c;
1866                 Monitor *m;
1867                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1868                 XineramaScreenInfo *unique = NULL;
1869
1870                 for (n = 0, m = mons; m; m = m->next, n++);
1871                 /* only consider unique geometries as separate screens */
1872                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1873                 for (i = 0, j = 0; i < nn; i++)
1874                         if (isuniquegeom(unique, j, &info[i]))
1875                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1876                 XFree(info);
1877                 nn = j;
1878                 if (n <= nn) { /* new monitors available */
1879                         for (i = 0; i < (nn - n); i++) {
1880                                 for (m = mons; m && m->next; m = m->next);
1881                                 if (m)
1882                                         m->next = createmon();
1883                                 else
1884                                         mons = createmon();
1885                         }
1886                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1887                                 if (i >= n
1888                                 || unique[i].x_org != m->mx || unique[i].y_org != m->my
1889                                 || unique[i].width != m->mw || unique[i].height != m->mh)
1890                                 {
1891                                         dirty = 1;
1892                                         m->num = i;
1893                                         m->mx = m->wx = unique[i].x_org;
1894                                         m->my = m->wy = unique[i].y_org;
1895                                         m->mw = m->ww = unique[i].width;
1896                                         m->mh = m->wh = unique[i].height;
1897                                         updatebarpos(m);
1898                                 }
1899                 } else { /* less monitors available nn < n */
1900                         for (i = nn; i < n; i++) {
1901                                 for (m = mons; m && m->next; m = m->next);
1902                                 while ((c = m->clients)) {
1903                                         dirty = 1;
1904                                         m->clients = c->next;
1905                                         detachstack(c);
1906                                         c->mon = mons;
1907                                         attach(c);
1908                                         attachstack(c);
1909                                 }
1910                                 if (m == selmon)
1911                                         selmon = mons;
1912                                 cleanupmon(m);
1913                         }
1914                 }
1915                 free(unique);
1916         } else
1917 #endif /* XINERAMA */
1918         { /* default monitor setup */
1919                 if (!mons)
1920                         mons = createmon();
1921                 if (mons->mw != sw || mons->mh != sh) {
1922                         dirty = 1;
1923                         mons->mw = mons->ww = sw;
1924                         mons->mh = mons->wh = sh;
1925                         updatebarpos(mons);
1926                 }
1927         }
1928         if (dirty) {
1929                 selmon = mons;
1930                 selmon = wintomon(root);
1931         }
1932         return dirty;
1933 }
1934
1935 void
1936 updatenumlockmask(void)
1937 {
1938         unsigned int i, j;
1939         XModifierKeymap *modmap;
1940
1941         numlockmask = 0;
1942         modmap = XGetModifierMapping(dpy);
1943         for (i = 0; i < 8; i++)
1944                 for (j = 0; j < modmap->max_keypermod; j++)
1945                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1946                                 == XKeysymToKeycode(dpy, XK_Num_Lock))
1947                                 numlockmask = (1 << i);
1948         XFreeModifiermap(modmap);
1949 }
1950
1951 void
1952 updatesizehints(Client *c)
1953 {
1954         long msize;
1955         XSizeHints size;
1956
1957         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1958                 /* size is uninitialized, ensure that size.flags aren't used */
1959                 size.flags = PSize;
1960         if (size.flags & PBaseSize) {
1961                 c->basew = size.base_width;
1962                 c->baseh = size.base_height;
1963         } else if (size.flags & PMinSize) {
1964                 c->basew = size.min_width;
1965                 c->baseh = size.min_height;
1966         } else
1967                 c->basew = c->baseh = 0;
1968         if (size.flags & PResizeInc) {
1969                 c->incw = size.width_inc;
1970                 c->inch = size.height_inc;
1971         } else
1972                 c->incw = c->inch = 0;
1973         if (size.flags & PMaxSize) {
1974                 c->maxw = size.max_width;
1975                 c->maxh = size.max_height;
1976         } else
1977                 c->maxw = c->maxh = 0;
1978         if (size.flags & PMinSize) {
1979                 c->minw = size.min_width;
1980                 c->minh = size.min_height;
1981         } else if (size.flags & PBaseSize) {
1982                 c->minw = size.base_width;
1983                 c->minh = size.base_height;
1984         } else
1985                 c->minw = c->minh = 0;
1986         if (size.flags & PAspect) {
1987                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1988                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1989         } else
1990                 c->maxa = c->mina = 0.0;
1991         c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
1992 }
1993
1994 void
1995 updatestatus(void)
1996 {
1997         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1998                 strcpy(stext, "dwm-"VERSION);
1999         drawbar(selmon);
2000 }
2001
2002 void
2003 updatetitle(Client *c)
2004 {
2005         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2006                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2007         if (c->name[0] == '\0') /* hack to mark broken clients */
2008                 strcpy(c->name, broken);
2009 }
2010
2011 void
2012 updatewindowtype(Client *c)
2013 {
2014         Atom state = getatomprop(c, netatom[NetWMState]);
2015         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2016
2017         if (state == netatom[NetWMFullscreen])
2018                 setfullscreen(c, 1);
2019         if (wtype == netatom[NetWMWindowTypeDialog])
2020                 c->isfloating = 1;
2021 }
2022
2023 void
2024 updatewmhints(Client *c)
2025 {
2026         XWMHints *wmh;
2027
2028         if ((wmh = XGetWMHints(dpy, c->win))) {
2029                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2030                         wmh->flags &= ~XUrgencyHint;
2031                         XSetWMHints(dpy, c->win, wmh);
2032                 } else
2033                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2034                 if (wmh->flags & InputHint)
2035                         c->neverfocus = !wmh->input;
2036                 else
2037                         c->neverfocus = 0;
2038                 XFree(wmh);
2039         }
2040 }
2041
2042 void
2043 view(const Arg *arg)
2044 {
2045         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2046                 return;
2047         selmon->seltags ^= 1; /* toggle sel tagset */
2048         if (arg->ui & TAGMASK)
2049                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2050         focus(NULL);
2051         arrange(selmon);
2052 }
2053
2054 Client *
2055 wintoclient(Window w)
2056 {
2057         Client *c;
2058         Monitor *m;
2059
2060         for (m = mons; m; m = m->next)
2061                 for (c = m->clients; c; c = c->next)
2062                         if (c->win == w)
2063                                 return c;
2064         return NULL;
2065 }
2066
2067 Monitor *
2068 wintomon(Window w)
2069 {
2070         int x, y;
2071         Client *c;
2072         Monitor *m;
2073
2074         if (w == root && getrootptr(&x, &y))
2075                 return recttomon(x, y, 1, 1);
2076         for (m = mons; m; m = m->next)
2077                 if (w == m->barwin)
2078                         return m;
2079         if ((c = wintoclient(w)))
2080                 return c->mon;
2081         return selmon;
2082 }
2083
2084 /* There's no way to check accesses to destroyed windows, thus those cases are
2085  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2086  * default error handler, which may call exit. */
2087 int
2088 xerror(Display *dpy, XErrorEvent *ee)
2089 {
2090         if (ee->error_code == BadWindow
2091         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2092         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2093         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2094         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2095         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2096         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2097         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2098         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2099                 return 0;
2100         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2101                 ee->request_code, ee->error_code);
2102         return xerrorxlib(dpy, ee); /* may call exit */
2103 }
2104
2105 int
2106 xerrordummy(Display *dpy, XErrorEvent *ee)
2107 {
2108         return 0;
2109 }
2110
2111 /* Startup Error handler to check if another window manager
2112  * is already running. */
2113 int
2114 xerrorstart(Display *dpy, XErrorEvent *ee)
2115 {
2116         die("dwm: another window manager is already running");
2117         return -1;
2118 }
2119
2120 void
2121 zoom(const Arg *arg)
2122 {
2123         Client *c = selmon->sel;
2124
2125         if (!selmon->lt[selmon->sellt]->arrange
2126         || (selmon->sel && selmon->sel->isfloating))
2127                 return;
2128         if (c == nexttiled(selmon->clients))
2129                 if (!c || !(c = nexttiled(c->next)))
2130                         return;
2131         pop(c);
2132 }
2133
2134 int
2135 main(int argc, char *argv[])
2136 {
2137         if (argc == 2 && !strcmp("-v", argv[1]))
2138                 die("dwm-"VERSION);
2139         else if (argc != 1)
2140                 die("usage: dwm [-v]");
2141         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2142                 fputs("warning: no locale support\n", stderr);
2143         if (!(dpy = XOpenDisplay(NULL)))
2144                 die("dwm: cannot open display");
2145         checkotherwm();
2146         setup();
2147 #ifdef __OpenBSD__
2148         if (pledge("stdio rpath proc exec", NULL) == -1)
2149                 die("pledge");
2150 #endif /* __OpenBSD__ */
2151         scan();
2152         run();
2153         cleanup();
2154         XCloseDisplay(dpy);
2155         return EXIT_SUCCESS;
2156 }