dwm.c

   1 /* See LICENSE file for copyright and license details.
   2  *
   3  * dynamic window manager is designed like any other X client as well. It is
   4  * driven through handling X events. In contrast to other X clients, a window
   5  * manager selects for SubstructureRedirectMask on the root window, to receive
   6  * events about window (dis-)appearance.  Only one X connection at a time is
   7  * allowed to select for this event mask.
   8  *
   9  * The event handlers of dwm are organized in an array which is accessed
  10  * whenever a new event has been fetched. This allows event dispatching
  11  * in O(1) time.
  12  *
  13  * Each child of the root window is called a client, except windows which have
  14  * set the override_redirect flag.  Clients are organized in a linked client
  15  * list on each monitor, the focus history is remembered through a stack list
  16  * on each monitor. Each client contains a bit array to indicate the tags of a
  17  * client.
  18  *
  19  * Keys and tagging rules are organized as arrays and defined in config.h.
  20  *
  21  * To understand everything else, start reading main().
  22  */
  23 #include <errno.h>
  24 #include <locale.h>
  25 #include <signal.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/wait.h>
  33 #include <X11/cursorfont.h>
  34 #include <X11/keysym.h>
  35 #include <X11/Xatom.h>
  36 #include <X11/Xlib.h>
  37 #include <X11/Xproto.h>
  38 #include <X11/Xutil.h>
  39 #ifdef XINERAMA
  40 #include <X11/extensions/Xinerama.h>
  41 #endif /* XINERAMA */
  42 #include <X11/Xft/Xft.h>
  43
  44 #include "drw.h"
  45 #include "util.h"
  46
  47 /* macros */
  48 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  49 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  50 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  51                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  52 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  53 #define LENGTH(X)               (sizeof X / sizeof X[0])
  54 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  55 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  56 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  57 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  58 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
  59 #define ColBorder               2
  60
  61 /* enums */
  62 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  63 enum { SchemeNorm, SchemeSel }; /* color schemes */
  64 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  65        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  66        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  67 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  68 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  69        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  70
  71 typedef union {
  72         int i;
  73         unsigned int ui;
  74         float f;
  75         const void *v;
  76 } Arg;
  77
  78 typedef struct {
  79         unsigned int click;
  80         unsigned int mask;
  81         unsigned int button;
  82         void (*func)(const Arg *arg);
  83         const Arg arg;
  84 } Button;
  85
  86 typedef struct Monitor Monitor;
  87 typedef struct Client Client;
  88 struct Client {
  89         char name[256];
  90         float mina, maxa;
  91         int x, y, w, h;
  92         int oldx, oldy, oldw, oldh;
  93         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  94         int bw, oldbw;
  95         unsigned int tags;
  96         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  97         Client *next;
  98         Client *snext;
  99         Monitor *mon;
 100         Window win;
 101 };
 102
 103 typedef struct {
 104         unsigned int mod;
 105         KeySym keysym;
 106         void (*func)(const Arg *);
 107         const Arg arg;
 108 } Key;
 109
 110 typedef struct {
 111         const char *symbol;
 112         void (*arrange)(Monitor *);
 113 } Layout;
 114
 115 struct Monitor {
 116         char ltsymbol[16];
 117         float mfact;
 118         int nmaster;
 119         int num;
 120         int by;               /* bar geometry */
 121         int mx, my, mw, mh;   /* screen size */
 122         int wx, wy, ww, wh;   /* window area  */
 123         unsigned int seltags;
 124         unsigned int sellt;
 125         unsigned int tagset[2];
 126         int showbar;
 127         int topbar;
 128         Client *clients;
 129         Client *sel;
 130         Client *stack;
 131         Monitor *next;
 132         Window barwin;
 133         const Layout *lt[2];
 134 };
 135
 136 typedef struct {
 137         const char *class;
 138         const char *instance;
 139         const char *title;
 140         unsigned int tags;
 141         int isfloating;
 142         int monitor;
 143 } Rule;
 144
 145 /* function declarations */
 146 static void applyrules(Client *c);
 147 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 148 static void arrange(Monitor *m);
 149 static void arrangemon(Monitor *m);
 150 static void attach(Client *c);
 151 static void attachstack(Client *c);
 152 static void buttonpress(XEvent *e);
 153 static void checkotherwm(void);
 154 static void cleanup(void);
 155 static void cleanupmon(Monitor *mon);
 156 static void clientmessage(XEvent *e);
 157 static void configure(Client *c);
 158 static void configurenotify(XEvent *e);
 159 static void configurerequest(XEvent *e);
 160 static Monitor *createmon(void);
 161 static void destroynotify(XEvent *e);
 162 static void detach(Client *c);
 163 static void detachstack(Client *c);
 164 static Monitor *dirtomon(int dir);
 165 static void drawbar(Monitor *m);
 166 static void drawbars(void);
 167 static void enternotify(XEvent *e);
 168 static void expose(XEvent *e);
 169 static void focus(Client *c);
 170 static void focusin(XEvent *e);
 171 static void focusmon(const Arg *arg);
 172 static void focusstack(const Arg *arg);
 173 static int getrootptr(int *x, int *y);
 174 static long getstate(Window w);
 175 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 176 static void grabbuttons(Client *c, int focused);
 177 static void grabkeys(void);
 178 static void incnmaster(const Arg *arg);
 179 static void keypress(XEvent *e);
 180 static void killclient(const Arg *arg);
 181 static void manage(Window w, XWindowAttributes *wa);
 182 static void mappingnotify(XEvent *e);
 183 static void maprequest(XEvent *e);
 184 static void monocle(Monitor *m);
 185 static void motionnotify(XEvent *e);
 186 static void movemouse(const Arg *arg);
 187 static Client *nexttiled(Client *c);
 188 static void pop(Client *);
 189 static void propertynotify(XEvent *e);
 190 static void quit(const Arg *arg);
 191 static Monitor *recttomon(int x, int y, int w, int h);
 192 static void resize(Client *c, int x, int y, int w, int h, int interact);
 193 static void resizeclient(Client *c, int x, int y, int w, int h);
 194 static void resizemouse(const Arg *arg);
 195 static void restack(Monitor *m);
 196 static void run(void);
 197 static void scan(void);
 198 static int sendevent(Client *c, Atom proto);
 199 static void sendmon(Client *c, Monitor *m);
 200 static void setclientstate(Client *c, long state);
 201 static void setfocus(Client *c);
 202 static void setfullscreen(Client *c, int fullscreen);
 203 static void setlayout(const Arg *arg);
 204 static void setmfact(const Arg *arg);
 205 static void setup(void);
 206 static void 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 int updategeom(void);
 221 static void updatebarpos(Monitor *m);
 222 static void updatebars(void);
 223 static void updateclientlist(void);
 224 static void updatenumlockmask(void);
 225 static void updatesizehints(Client *c);
 226 static void updatestatus(void);
 227 static void updatewindowtype(Client *c);
 228 static void updatetitle(Client *c);
 229 static void updatewmhints(Client *c);
 230 static void view(const Arg *arg);
 231 static Client *wintoclient(Window w);
 232 static Monitor *wintomon(Window w);
 233 static int xerror(Display *dpy, XErrorEvent *ee);
 234 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 235 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 236 static void zoom(const Arg *arg);
 237
 238 /* variables */
 239 static const char broken[] = "broken";
 240 static char stext[256];
 241 static int screen;
 242 static int sw, sh;           /* X display screen geometry width, height */
 243 static int bh, blw = 0;      /* bar geometry */
 244 static int lrpad;            /* sum of left and right padding for text */
 245 static int (*xerrorxlib)(Display *, XErrorEvent *);
 246 static unsigned int numlockmask = 0;
 247 static void (*handler[LASTEvent]) (XEvent *) = {
 248         [ButtonPress] = buttonpress,
 249         [ClientMessage] = clientmessage,
 250         [ConfigureRequest] = configurerequest,
 251         [ConfigureNotify] = configurenotify,
 252         [DestroyNotify] = destroynotify,
 253         [EnterNotify] = enternotify,
 254         [Expose] = expose,
 255         [FocusIn] = focusin,
 256         [KeyPress] = keypress,
 257         [MappingNotify] = mappingnotify,
 258         [MapRequest] = maprequest,
 259         [MotionNotify] = motionnotify,
 260         [PropertyNotify] = propertynotify,
 261         [UnmapNotify] = unmapnotify
 262 };
 263 static Atom wmatom[WMLast], netatom[NetLast];
 264 static int running = 1;
 265 static Cur *cursor[CurLast];
 266 static Scm *scheme;
 267 static Display *dpy;
 268 static Drw *drw;
 269 static Monitor *mons, *selmon;
 270 static Window root, wmcheckwin;
 271
 272 /* configuration, allows nested code to access above variables */
 273 #include "config.h"
 274
 275 /* compile-time check if all tags fit into an unsigned int bit array. */
 276 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 277
 278 /* function implementations */
 279 void
 280 applyrules(Client *c)
 281 {
 282         const char *class, *instance;
 283         unsigned int i;
 284         const Rule *r;
 285         Monitor *m;
 286         XClassHint ch = { NULL, NULL };
 287
 288         /* rule matching */
 289         c->isfloating = 0;
 290         c->tags = 0;
 291         XGetClassHint(dpy, c->win, &ch);
 292         class    = ch.res_class ? ch.res_class : broken;
 293         instance = ch.res_name  ? ch.res_name  : broken;
 294
 295         for (i = 0; i < LENGTH(rules); i++) {
 296                 r = &rules[i];
 297                 if ((!r->title || strstr(c->name, r->title))
 298                 && (!r->class || strstr(class, r->class))
 299                 && (!r->instance || strstr(instance, r->instance)))
 300                 {
 301                         c->isfloating = r->isfloating;
 302                         c->tags |= r->tags;
 303                         for (m = mons; m && m->num != r->monitor; m = m->next);
 304                         if (m)
 305                                 c->mon = m;
 306                 }
 307         }
 308         if (ch.res_class)
 309                 XFree(ch.res_class);
 310         if (ch.res_name)
 311                 XFree(ch.res_name);
 312         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 313 }
 314
 315 int
 316 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 317 {
 318         int baseismin;
 319         Monitor *m = c->mon;
 320
 321         /* set minimum possible */
 322         *w = MAX(1, *w);
 323         *h = MAX(1, *h);
 324         if (interact) {
 325                 if (*x > sw)
 326                         *x = sw - WIDTH(c);
 327                 if (*y > sh)
 328                         *y = sh - HEIGHT(c);
 329                 if (*x + *w + 2 * c->bw < 0)
 330                         *x = 0;
 331                 if (*y + *h + 2 * c->bw < 0)
 332                         *y = 0;
 333         } else {
 334                 if (*x >= m->wx + m->ww)
 335                         *x = m->wx + m->ww - WIDTH(c);
 336                 if (*y >= m->wy + m->wh)
 337                         *y = m->wy + m->wh - HEIGHT(c);
 338                 if (*x + *w + 2 * c->bw <= m->wx)
 339                         *x = m->wx;
 340                 if (*y + *h + 2 * c->bw <= m->wy)
 341                         *y = m->wy;
 342         }
 343         if (*h < bh)
 344                 *h = bh;
 345         if (*w < bh)
 346                 *w = bh;
 347         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 348                 /* see last two sentences in ICCCM 4.1.2.3 */
 349                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 350                 if (!baseismin) { /* temporarily remove base dimensions */
 351                         *w -= c->basew;
 352                         *h -= c->baseh;
 353                 }
 354                 /* adjust for aspect limits */
 355                 if (c->mina > 0 && c->maxa > 0) {
 356                         if (c->maxa < (float)*w / *h)
 357                                 *w = *h * c->maxa + 0.5;
 358                         else if (c->mina < (float)*h / *w)
 359                                 *h = *w * c->mina + 0.5;
 360                 }
 361                 if (baseismin) { /* increment calculation requires this */
 362                         *w -= c->basew;
 363                         *h -= c->baseh;
 364                 }
 365                 /* adjust for increment value */
 366                 if (c->incw)
 367                         *w -= *w % c->incw;
 368                 if (c->inch)
 369                         *h -= *h % c->inch;
 370                 /* restore base dimensions */
 371                 *w = MAX(*w + c->basew, c->minw);
 372                 *h = MAX(*h + c->baseh, c->minh);
 373                 if (c->maxw)
 374                         *w = MIN(*w, c->maxw);
 375                 if (c->maxh)
 376                         *h = MIN(*h, c->maxh);
 377         }
 378         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 379 }
 380
 381 void
 382 arrange(Monitor *m)
 383 {
 384         if (m)
 385                 showhide(m->stack);
 386         else for (m = mons; m; m = m->next)
 387                 showhide(m->stack);
 388         if (m) {
 389                 arrangemon(m);
 390                 restack(m);
 391         } else for (m = mons; m; m = m->next)
 392                 arrangemon(m);
 393 }
 394
 395 void
 396 arrangemon(Monitor *m)
 397 {
 398         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 399         if (m->lt[m->sellt]->arrange)
 400                 m->lt[m->sellt]->arrange(m);
 401 }
 402
 403 void
 404 attach(Client *c)
 405 {
 406         c->next = c->mon->clients;
 407         c->mon->clients = c;
 408 }
 409
 410 void
 411 attachstack(Client *c)
 412 {
 413         c->snext = c->mon->stack;
 414         c->mon->stack = c;
 415 }
 416
 417 void
 418 buttonpress(XEvent *e)
 419 {
 420         unsigned int i, x, click;
 421         Arg arg = {0};
 422         Client *c;
 423         Monitor *m;
 424         XButtonPressedEvent *ev = &e->xbutton;
 425
 426         click = ClkRootWin;
 427         /* focus monitor if necessary */
 428         if ((m = wintomon(ev->window)) && m != selmon) {
 429                 unfocus(selmon->sel, 1);
 430                 selmon = m;
 431                 focus(NULL);
 432         }
 433         if (ev->window == selmon->barwin) {
 434                 i = x = 0;
 435                 do
 436                         x += TEXTW(tags[i]);
 437                 while (ev->x >= x && ++i < LENGTH(tags));
 438                 if (i < LENGTH(tags)) {
 439                         click = ClkTagBar;
 440                         arg.ui = 1 << i;
 441                 } else if (ev->x < x + blw)
 442                         click = ClkLtSymbol;
 443                 else if (ev->x > selmon->ww - TEXTW(stext))
 444                         click = ClkStatusText;
 445                 else
 446                         click = ClkWinTitle;
 447         } else if ((c = wintoclient(ev->window))) {
 448                 focus(c);
 449                 click = ClkClientWin;
 450         }
 451         for (i = 0; i < LENGTH(buttons); i++)
 452                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 453                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 454                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 455 }
 456
 457 void
 458 checkotherwm(void)
 459 {
 460         xerrorxlib = XSetErrorHandler(xerrorstart);
 461         /* this causes an error if some other window manager is running */
 462         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 463         XSync(dpy, False);
 464         XSetErrorHandler(xerror);
 465         XSync(dpy, False);
 466 }
 467
 468 void
 469 cleanup(void)
 470 {
 471         Arg a = {.ui = ~0};
 472         Layout foo = { "", NULL };
 473         Monitor *m;
 474         size_t i;
 475
 476         view(&a);
 477         selmon->lt[selmon->sellt] = &foo;
 478         for (m = mons; m; m = m->next)
 479                 while (m->stack)
 480                         unmanage(m->stack, 0);
 481         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 482         while (mons)
 483                 cleanupmon(mons);
 484         for (i = 0; i < CurLast; i++)
 485                 drw_cur_free(drw, cursor[i]);
 486         for (i = 0; i < LENGTH(colors); i++)
 487                 free(scheme[i]);
 488         XDestroyWindow(dpy, wmcheckwin);
 489         drw_free(drw);
 490         XSync(dpy, False);
 491         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 492         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 493 }
 494
 495 void
 496 cleanupmon(Monitor *mon)
 497 {
 498         Monitor *m;
 499
 500         if (mon == mons)
 501                 mons = mons->next;
 502         else {
 503                 for (m = mons; m && m->next != mon; m = m->next);
 504                 m->next = mon->next;
 505         }
 506         XUnmapWindow(dpy, mon->barwin);
 507         XDestroyWindow(dpy, mon->barwin);
 508         free(mon);
 509 }
 510
 511 void
 512 clientmessage(XEvent *e)
 513 {
 514         XClientMessageEvent *cme = &e->xclient;
 515         Client *c = wintoclient(cme->window);
 516
 517         if (!c)
 518                 return;
 519         if (cme->message_type == netatom[NetWMState]) {
 520                 if (cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 521                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 522                                       || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 523         } else if (cme->message_type == netatom[NetActiveWindow]) {
 524                 if (c != selmon->sel && !c->isurgent)
 525                         seturgent(c, 1);
 526         }
 527 }
 528
 529 void
 530 configure(Client *c)
 531 {
 532         XConfigureEvent ce;
 533
 534         ce.type = ConfigureNotify;
 535         ce.display = dpy;
 536         ce.event = c->win;
 537         ce.window = c->win;
 538         ce.x = c->x;
 539         ce.y = c->y;
 540         ce.width = c->w;
 541         ce.height = c->h;
 542         ce.border_width = c->bw;
 543         ce.above = None;
 544         ce.override_redirect = False;
 545         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 546 }
 547
 548 void
 549 configurenotify(XEvent *e)
 550 {
 551         Monitor *m;
 552         Client *c;
 553         XConfigureEvent *ev = &e->xconfigure;
 554         int dirty;
 555
 556         /* TODO: updategeom handling sucks, needs to be simplified */
 557         if (ev->window == root) {
 558                 dirty = (sw != ev->width || sh != ev->height);
 559                 sw = ev->width;
 560                 sh = ev->height;
 561                 if (updategeom() || dirty) {
 562                         drw_resize(drw, sw, bh);
 563                         updatebars();
 564                         for (m = mons; m; m = m->next) {
 565                                 for (c = m->clients; c; c = c->next)
 566                                         if (c->isfullscreen)
 567                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 568                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 569                         }
 570                         focus(NULL);
 571                         arrange(NULL);
 572                 }
 573         }
 574 }
 575
 576 void
 577 configurerequest(XEvent *e)
 578 {
 579         Client *c;
 580         Monitor *m;
 581         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 582         XWindowChanges wc;
 583
 584         if ((c = wintoclient(ev->window))) {
 585                 if (ev->value_mask & CWBorderWidth)
 586                         c->bw = ev->border_width;
 587                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 588                         m = c->mon;
 589                         if (ev->value_mask & CWX) {
 590                                 c->oldx = c->x;
 591                                 c->x = m->mx + ev->x;
 592                         }
 593                         if (ev->value_mask & CWY) {
 594                                 c->oldy = c->y;
 595                                 c->y = m->my + ev->y;
 596                         }
 597                         if (ev->value_mask & CWWidth) {
 598                                 c->oldw = c->w;
 599                                 c->w = ev->width;
 600                         }
 601                         if (ev->value_mask & CWHeight) {
 602                                 c->oldh = c->h;
 603                                 c->h = ev->height;
 604                         }
 605                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 606                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 607                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 608                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 609                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 610                                 configure(c);
 611                         if (ISVISIBLE(c))
 612                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 613                 } else
 614                         configure(c);
 615         } else {
 616                 wc.x = ev->x;
 617                 wc.y = ev->y;
 618                 wc.width = ev->width;
 619                 wc.height = ev->height;
 620                 wc.border_width = ev->border_width;
 621                 wc.sibling = ev->above;
 622                 wc.stack_mode = ev->detail;
 623                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 624         }
 625         XSync(dpy, False);
 626 }
 627
 628 Monitor *
 629 createmon(void)
 630 {
 631         Monitor *m;
 632
 633         m = ecalloc(1, sizeof(Monitor));
 634         m->tagset[0] = m->tagset[1] = 1;
 635         m->mfact = mfact;
 636         m->nmaster = nmaster;
 637         m->showbar = showbar;
 638         m->topbar = topbar;
 639         m->lt[0] = &layouts[0];
 640         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 641         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 642         return m;
 643 }
 644
 645 void
 646 destroynotify(XEvent *e)
 647 {
 648         Client *c;
 649         XDestroyWindowEvent *ev = &e->xdestroywindow;
 650
 651         if ((c = wintoclient(ev->window)))
 652                 unmanage(c, 1);
 653 }
 654
 655 void
 656 detach(Client *c)
 657 {
 658         Client **tc;
 659
 660         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 661         *tc = c->next;
 662 }
 663
 664 void
 665 detachstack(Client *c)
 666 {
 667         Client **tc, *t;
 668
 669         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 670         *tc = c->snext;
 671
 672         if (c == c->mon->sel) {
 673                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 674                 c->mon->sel = t;
 675         }
 676 }
 677
 678 Monitor *
 679 dirtomon(int dir)
 680 {
 681         Monitor *m = NULL;
 682
 683         if (dir > 0) {
 684                 if (!(m = selmon->next))
 685                         m = mons;
 686         } else if (selmon == mons)
 687                 for (m = mons; m->next; m = m->next);
 688         else
 689                 for (m = mons; m->next != selmon; m = m->next);
 690         return m;
 691 }
 692
 693 void
 694 drawbar(Monitor *m)
 695 {
 696         int x, w, sw = 0;
 697         int boxs = drw->fonts->h / 9;
 698         int boxw = drw->fonts->h / 6 + 2;
 699         unsigned int i, occ = 0, urg = 0;
 700         Client *c;
 701
 702         /* draw status first so it can be overdrawn by tags later */
 703         if (m == selmon) { /* status is only drawn on selected monitor */
 704                 drw_setscheme(drw, scheme[SchemeNorm]);
 705                 sw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 706                 drw_text(drw, m->ww - sw, 0, sw, bh, 0, stext, 0);
 707         }
 708
 709         for (c = m->clients; c; c = c->next) {
 710                 occ |= c->tags;
 711                 if (c->isurgent)
 712                         urg |= c->tags;
 713         }
 714         x = 0;
 715         for (i = 0; i < LENGTH(tags); i++) {
 716                 w = TEXTW(tags[i]);
 717                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 718                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 719                 if (occ & 1 << i)
 720                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 721                                  m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 722                                  urg & 1 << i);
 723                 x += w;
 724         }
 725         w = blw = TEXTW(m->ltsymbol);
 726         drw_setscheme(drw, scheme[SchemeNorm]);
 727         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 728
 729         if ((w = m->ww - sw - x) > bh) {
 730                 if (m->sel) {
 731                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 732                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 733                         if (m->sel->isfloating)
 734                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 735                 } else {
 736                         drw_setscheme(drw, scheme[SchemeNorm]);
 737                         drw_rect(drw, x, 0, w, bh, 1, 1);
 738                 }
 739         }
 740         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 741 }
 742
 743 void
 744 drawbars(void)
 745 {
 746         Monitor *m;
 747
 748         for (m = mons; m; m = m->next)
 749                 drawbar(m);
 750 }
 751
 752 void
 753 enternotify(XEvent *e)
 754 {
 755         Client *c;
 756         Monitor *m;
 757         XCrossingEvent *ev = &e->xcrossing;
 758
 759         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 760                 return;
 761         c = wintoclient(ev->window);
 762         m = c ? c->mon : wintomon(ev->window);
 763         if (m != selmon) {
 764                 unfocus(selmon->sel, 1);
 765                 selmon = m;
 766         } else if (!c || c == selmon->sel)
 767                 return;
 768         focus(c);
 769 }
 770
 771 void
 772 expose(XEvent *e)
 773 {
 774         Monitor *m;
 775         XExposeEvent *ev = &e->xexpose;
 776
 777         if (ev->count == 0 && (m = wintomon(ev->window)))
 778                 drawbar(m);
 779 }
 780
 781 void
 782 focus(Client *c)
 783 {
 784         if (!c || !ISVISIBLE(c))
 785                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 786         /* was if (selmon->sel) */
 787         if (selmon->sel && selmon->sel != c)
 788                 unfocus(selmon->sel, 0);
 789         if (c) {
 790                 if (c->mon != selmon)
 791                         selmon = c->mon;
 792                 if (c->isurgent)
 793                         seturgent(c, 0);
 794                 detachstack(c);
 795                 attachstack(c);
 796                 grabbuttons(c, 1);
 797                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 798                 setfocus(c);
 799         } else {
 800                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 801                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 802         }
 803         selmon->sel = c;
 804         drawbars();
 805 }
 806
 807 /* there are some broken focus acquiring clients */
 808 void
 809 focusin(XEvent *e)
 810 {
 811         XFocusChangeEvent *ev = &e->xfocus;
 812
 813         if (selmon->sel && ev->window != selmon->sel->win)
 814                 setfocus(selmon->sel);
 815 }
 816
 817 void
 818 focusmon(const Arg *arg)
 819 {
 820         Monitor *m;
 821
 822         if (!mons->next)
 823                 return;
 824         if ((m = dirtomon(arg->i)) == selmon)
 825                 return;
 826         unfocus(selmon->sel, 0); /* s/1/0/ fixes input focus issues
 827                                         in gedit and anjuta */
 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         XGetTextProperty(dpy, w, &name, atom);
 913         if (!name.nitems)
 914                 return 0;
 915         if (name.encoding == XA_STRING)
 916                 strncpy(text, (char *)name.value, size - 1);
 917         else {
 918                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 919                         strncpy(text, *list, size - 1);
 920                         XFreeStringList(list);
 921                 }
 922         }
 923         text[size - 1] = '\0';
 924         XFree(name.value);
 925         return 1;
 926 }
 927
 928 void
 929 grabbuttons(Client *c, int focused)
 930 {
 931         updatenumlockmask();
 932         {
 933                 unsigned int i, j;
 934                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 935                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 936                 if (focused) {
 937                         for (i = 0; i < LENGTH(buttons); i++)
 938                                 if (buttons[i].click == ClkClientWin)
 939                                         for (j = 0; j < LENGTH(modifiers); j++)
 940                                                 XGrabButton(dpy, buttons[i].button,
 941                                                             buttons[i].mask | modifiers[j],
 942                                                             c->win, False, BUTTONMASK,
 943                                                             GrabModeAsync, GrabModeSync, None, None);
 944                 } else
 945                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 946                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 947         }
 948 }
 949
 950 void
 951 grabkeys(void)
 952 {
 953         updatenumlockmask();
 954         {
 955                 unsigned int i, j;
 956                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 957                 KeyCode code;
 958
 959                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 960                 for (i = 0; i < LENGTH(keys); i++)
 961                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 962                                 for (j = 0; j < LENGTH(modifiers); j++)
 963                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 964                                                  True, GrabModeAsync, GrabModeAsync);
 965         }
 966 }
 967
 968 void
 969 incnmaster(const Arg *arg)
 970 {
 971         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 972         arrange(selmon);
 973 }
 974
 975 #ifdef XINERAMA
 976 static int
 977 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
 978 {
 979         while (n--)
 980                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 981                 && unique[n].width == info->width && unique[n].height == info->height)
 982                         return 0;
 983         return 1;
 984 }
 985 #endif /* XINERAMA */
 986
 987 void
 988 keypress(XEvent *e)
 989 {
 990         unsigned int i;
 991         KeySym keysym;
 992         XKeyEvent *ev;
 993
 994         ev = &e->xkey;
 995         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 996         for (i = 0; i < LENGTH(keys); i++)
 997                 if (keysym == keys[i].keysym
 998                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 999                 && keys[i].func)
1000                         keys[i].func(&(keys[i].arg));
1001 }
1002
1003 void
1004 killclient(const Arg *arg)
1005 {
1006         if (!selmon->sel)
1007                 return;
1008         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1009                 XGrabServer(dpy);
1010                 XSetErrorHandler(xerrordummy);
1011                 XSetCloseDownMode(dpy, DestroyAll);
1012                 XKillClient(dpy, selmon->sel->win);
1013                 XSync(dpy, False);
1014                 XSetErrorHandler(xerror);
1015                 XUngrabServer(dpy);
1016         }
1017 }
1018
1019 void
1020 manage(Window w, XWindowAttributes *wa)
1021 {
1022         Client *c, *t = NULL;
1023         Window trans = None;
1024         XWindowChanges wc;
1025
1026         c = ecalloc(1, sizeof(Client));
1027         c->win = w;
1028         /* geometry */
1029         c->x = c->oldx = wa->x;
1030         c->y = c->oldy = wa->y;
1031         c->w = c->oldw = wa->width;
1032         c->h = c->oldh = wa->height;
1033         c->oldbw = wa->border_width;
1034
1035         updatetitle(c);
1036         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1037                 c->mon = t->mon;
1038                 c->tags = t->tags;
1039         } else {
1040                 c->mon = selmon;
1041                 applyrules(c);
1042         }
1043
1044         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1045                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1046         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1047                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1048         c->x = MAX(c->x, c->mon->mx);
1049         /* only fix client y-offset, if the client center might cover the bar */
1050         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1051                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1052         c->bw = borderpx;
1053
1054         wc.border_width = c->bw;
1055         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1056         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1057         configure(c); /* propagates border_width, if size doesn't change */
1058         updatewindowtype(c);
1059         updatesizehints(c);
1060         updatewmhints(c);
1061         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1062         grabbuttons(c, 0);
1063         if (!c->isfloating)
1064                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1065         if (c->isfloating)
1066                 XRaiseWindow(dpy, c->win);
1067         attach(c);
1068         attachstack(c);
1069         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1070                         (unsigned char *) &(c->win), 1);
1071         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1072         setclientstate(c, NormalState);
1073         if (c->mon == selmon)
1074                 unfocus(selmon->sel, 0);
1075         c->mon->sel = c;
1076         arrange(c->mon);
1077         XMapWindow(dpy, c->win);
1078         focus(NULL);
1079 }
1080
1081 void
1082 mappingnotify(XEvent *e)
1083 {
1084         XMappingEvent *ev = &e->xmapping;
1085
1086         XRefreshKeyboardMapping(ev);
1087         if (ev->request == MappingKeyboard)
1088                 grabkeys();
1089 }
1090
1091 void
1092 maprequest(XEvent *e)
1093 {
1094         static XWindowAttributes wa;
1095         XMapRequestEvent *ev = &e->xmaprequest;
1096
1097         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1098                 return;
1099         if (wa.override_redirect)
1100                 return;
1101         if (!wintoclient(ev->window))
1102                 manage(ev->window, &wa);
1103 }
1104
1105 void
1106 monocle(Monitor *m)
1107 {
1108         unsigned int n = 0;
1109         Client *c;
1110
1111         for (c = m->clients; c; c = c->next)
1112                 if (ISVISIBLE(c))
1113                         n++;
1114         if (n > 0) /* override layout symbol */
1115                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1116         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1117                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1118 }
1119
1120 void
1121 motionnotify(XEvent *e)
1122 {
1123         static Monitor *mon = NULL;
1124         Monitor *m;
1125         XMotionEvent *ev = &e->xmotion;
1126
1127         if (ev->window != root)
1128                 return;
1129         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1130                 unfocus(selmon->sel, 1);
1131                 selmon = m;
1132                 focus(NULL);
1133         }
1134         mon = m;
1135 }
1136
1137 void
1138 movemouse(const Arg *arg)
1139 {
1140         int x, y, ocx, ocy, nx, ny;
1141         Client *c;
1142         Monitor *m;
1143         XEvent ev;
1144         Time lasttime = 0;
1145
1146         if (!(c = selmon->sel))
1147                 return;
1148         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1149                 return;
1150         restack(selmon);
1151         ocx = c->x;
1152         ocy = c->y;
1153         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1154         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1155                 return;
1156         if (!getrootptr(&x, &y))
1157                 return;
1158         do {
1159                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1160                 switch(ev.type) {
1161                 case ConfigureRequest:
1162                 case Expose:
1163                 case MapRequest:
1164                         handler[ev.type](&ev);
1165                         break;
1166                 case MotionNotify:
1167                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1168                                 continue;
1169                         lasttime = ev.xmotion.time;
1170
1171                         nx = ocx + (ev.xmotion.x - x);
1172                         ny = ocy + (ev.xmotion.y - y);
1173                         if (nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1174                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1175                                 if (abs(selmon->wx - nx) < snap)
1176                                         nx = selmon->wx;
1177                                 else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1178                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1179                                 if (abs(selmon->wy - ny) < snap)
1180                                         ny = selmon->wy;
1181                                 else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1182                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1183                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1184                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1185                                         togglefloating(NULL);
1186                         }
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 absolutly */
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 < 0.1 || f > 0.9)
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(Scm));
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", 4);
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 for events */
1594         wa.cursor = cursor[CurNormal]->cursor;
1595         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1596                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1597         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1598         XSelectInput(dpy, root, wa.event_mask);
1599         grabkeys();
1600         focus(NULL);
1601 }
1602
1603
1604 void
1605 seturgent(Client *c, int urg)
1606 {
1607         XWMHints *wmh;
1608
1609         c->isurgent = urg;
1610         if (!(wmh = XGetWMHints(dpy, c->win)))
1611                 return;
1612         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1613         XSetWMHints(dpy, c->win, wmh);
1614         XFree(wmh);
1615 }
1616
1617 void
1618 showhide(Client *c)
1619 {
1620         if (!c)
1621                 return;
1622         if (ISVISIBLE(c)) {
1623                 /* show clients top down */
1624                 XMoveWindow(dpy, c->win, c->x, c->y);
1625                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1626                         resize(c, c->x, c->y, c->w, c->h, 0);
1627                 showhide(c->snext);
1628         } else {
1629                 /* hide clients bottom up */
1630                 showhide(c->snext);
1631                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1632         }
1633 }
1634
1635 void
1636 sigchld(int unused)
1637 {
1638         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1639                 die("can't install SIGCHLD handler:");
1640         while (0 < waitpid(-1, NULL, WNOHANG));
1641 }
1642
1643 void
1644 spawn(const Arg *arg)
1645 {
1646         if (arg->v == dmenucmd)
1647                 dmenumon[0] = '0' + selmon->num;
1648         if (fork() == 0) {
1649                 if (dpy)
1650                         close(ConnectionNumber(dpy));
1651                 setsid();
1652                 execvp(((char **)arg->v)[0], (char **)arg->v);
1653                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1654                 perror(" failed");
1655                 exit(EXIT_SUCCESS);
1656         }
1657 }
1658
1659 void
1660 tag(const Arg *arg)
1661 {
1662         if (selmon->sel && arg->ui & TAGMASK) {
1663                 selmon->sel->tags = arg->ui & TAGMASK;
1664                 focus(NULL);
1665                 arrange(selmon);
1666         }
1667 }
1668
1669 void
1670 tagmon(const Arg *arg)
1671 {
1672         if (!selmon->sel || !mons->next)
1673                 return;
1674         sendmon(selmon->sel, dirtomon(arg->i));
1675 }
1676
1677 void
1678 tile(Monitor *m)
1679 {
1680         unsigned int i, n, h, mw, my, ty;
1681         Client *c;
1682
1683         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1684         if (n == 0)
1685                 return;
1686
1687         if (n > m->nmaster)
1688                 mw = m->nmaster ? m->ww * m->mfact : 0;
1689         else
1690                 mw = m->ww;
1691         for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1692                 if (i < m->nmaster) {
1693                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1694                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
1695                         my += HEIGHT(c);
1696                 } else {
1697                         h = (m->wh - ty) / (n - i);
1698                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
1699                         ty += HEIGHT(c);
1700                 }
1701 }
1702
1703 void
1704 togglebar(const Arg *arg)
1705 {
1706         selmon->showbar = !selmon->showbar;
1707         updatebarpos(selmon);
1708         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1709         arrange(selmon);
1710 }
1711
1712 void
1713 togglefloating(const Arg *arg)
1714 {
1715         if (!selmon->sel)
1716                 return;
1717         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1718                 return;
1719         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1720         if (selmon->sel->isfloating)
1721                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1722                        selmon->sel->w, selmon->sel->h, 0);
1723         arrange(selmon);
1724 }
1725
1726 void
1727 toggletag(const Arg *arg)
1728 {
1729         unsigned int newtags;
1730
1731         if (!selmon->sel)
1732                 return;
1733         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1734         if (newtags) {
1735                 selmon->sel->tags = newtags;
1736                 focus(NULL);
1737                 arrange(selmon);
1738         }
1739 }
1740
1741 void
1742 toggleview(const Arg *arg)
1743 {
1744         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1745
1746         if (newtagset) {
1747                 selmon->tagset[selmon->seltags] = newtagset;
1748                 focus(NULL);
1749                 arrange(selmon);
1750         }
1751 }
1752
1753 void
1754 unfocus(Client *c, int setfocus)
1755 {
1756         if (!c)
1757                 return;
1758         grabbuttons(c, 0);
1759         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1760         if (setfocus) {
1761                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1762                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1763         }
1764 }
1765
1766 void
1767 unmanage(Client *c, int destroyed)
1768 {
1769         Monitor *m = c->mon;
1770         XWindowChanges wc;
1771
1772         /* The server grab construct avoids race conditions. */
1773         detach(c);
1774         detachstack(c);
1775         if (!destroyed) {
1776                 wc.border_width = c->oldbw;
1777                 XGrabServer(dpy);
1778                 XSetErrorHandler(xerrordummy);
1779                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1780                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1781                 setclientstate(c, WithdrawnState);
1782                 XSync(dpy, False);
1783                 XSetErrorHandler(xerror);
1784                 XUngrabServer(dpy);
1785         }
1786         free(c);
1787         focus(NULL);
1788         updateclientlist();
1789         arrange(m);
1790 }
1791
1792 void
1793 unmapnotify(XEvent *e)
1794 {
1795         Client *c;
1796         XUnmapEvent *ev = &e->xunmap;
1797
1798         if ((c = wintoclient(ev->window))) {
1799                 if (ev->send_event)
1800                         setclientstate(c, WithdrawnState);
1801                 else
1802                         unmanage(c, 0);
1803         }
1804 }
1805
1806 void
1807 updatebars(void)
1808 {
1809         Monitor *m;
1810         XSetWindowAttributes wa = {
1811                 .override_redirect = True,
1812                 .background_pixmap = ParentRelative,
1813                 .event_mask = ButtonPressMask|ExposureMask
1814         };
1815         for (m = mons; m; m = m->next) {
1816                 if (m->barwin)
1817                         continue;
1818                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1819                                           CopyFromParent, DefaultVisual(dpy, screen),
1820                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1821                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1822                 XMapRaised(dpy, m->barwin);
1823         }
1824 }
1825
1826 void
1827 updatebarpos(Monitor *m)
1828 {
1829         m->wy = m->my;
1830         m->wh = m->mh;
1831         if (m->showbar) {
1832                 m->wh -= bh;
1833                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1834                 m->wy = m->topbar ? m->wy + bh : m->wy;
1835         } else
1836                 m->by = -bh;
1837 }
1838
1839 void
1840 updateclientlist()
1841 {
1842         Client *c;
1843         Monitor *m;
1844
1845         XDeleteProperty(dpy, root, netatom[NetClientList]);
1846         for (m = mons; m; m = m->next)
1847                 for (c = m->clients; c; c = c->next)
1848                         XChangeProperty(dpy, root, netatom[NetClientList],
1849                                         XA_WINDOW, 32, PropModeAppend,
1850                                         (unsigned char *) &(c->win), 1);
1851 }
1852
1853 int
1854 updategeom(void)
1855 {
1856         int dirty = 0;
1857
1858 #ifdef XINERAMA
1859         if (XineramaIsActive(dpy)) {
1860                 int i, j, n, nn;
1861                 Client *c;
1862                 Monitor *m;
1863                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1864                 XineramaScreenInfo *unique = NULL;
1865
1866                 for (n = 0, m = mons; m; m = m->next, n++);
1867                 /* only consider unique geometries as separate screens */
1868                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1869                 for (i = 0, j = 0; i < nn; i++)
1870                         if (isuniquegeom(unique, j, &info[i]))
1871                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1872                 XFree(info);
1873                 nn = j;
1874                 if (n <= nn) {
1875                         for (i = 0; i < (nn - n); i++) { /* new monitors available */
1876                                 for (m = mons; m && m->next; m = m->next);
1877                                 if (m)
1878                                         m->next = createmon();
1879                                 else
1880                                         mons = createmon();
1881                         }
1882                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
1883                                 if (i >= n
1884                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1885                                     || unique[i].width != m->mw || unique[i].height != m->mh))
1886                                 {
1887                                         dirty = 1;
1888                                         m->num = i;
1889                                         m->mx = m->wx = unique[i].x_org;
1890                                         m->my = m->wy = unique[i].y_org;
1891                                         m->mw = m->ww = unique[i].width;
1892                                         m->mh = m->wh = unique[i].height;
1893                                         updatebarpos(m);
1894                                 }
1895                 } else {
1896                         /* less monitors available nn < n */
1897                         for (i = nn; i < n; i++) {
1898                                 for (m = mons; m && m->next; m = m->next);
1899                                 while (m->clients) {
1900                                         dirty = 1;
1901                                         c = m->clients;
1902                                         m->clients = c->next;
1903                                         detachstack(c);
1904                                         c->mon = mons;
1905                                         attach(c);
1906                                         attachstack(c);
1907                                 }
1908                                 if (m == selmon)
1909                                         selmon = mons;
1910                                 cleanupmon(m);
1911                         }
1912                 }
1913                 free(unique);
1914         } else
1915 #endif /* XINERAMA */
1916         /* default monitor setup */
1917         {
1918                 if (!mons)
1919                         mons = createmon();
1920                 if (mons->mw != sw || mons->mh != sh) {
1921                         dirty = 1;
1922                         mons->mw = mons->ww = sw;
1923                         mons->mh = mons->wh = sh;
1924                         updatebarpos(mons);
1925                 }
1926         }
1927         if (dirty) {
1928                 selmon = mons;
1929                 selmon = wintomon(root);
1930         }
1931         return dirty;
1932 }
1933
1934 void
1935 updatenumlockmask(void)
1936 {
1937         unsigned int i, j;
1938         XModifierKeymap *modmap;
1939
1940         numlockmask = 0;
1941         modmap = XGetModifierMapping(dpy);
1942         for (i = 0; i < 8; i++)
1943                 for (j = 0; j < modmap->max_keypermod; j++)
1944                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1945                            == XKeysymToKeycode(dpy, XK_Num_Lock))
1946                                 numlockmask = (1 << i);
1947         XFreeModifiermap(modmap);
1948 }
1949
1950 void
1951 updatesizehints(Client *c)
1952 {
1953         long msize;
1954         XSizeHints size;
1955
1956         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
1957                 /* size is uninitialized, ensure that size.flags aren't used */
1958                 size.flags = PSize;
1959         if (size.flags & PBaseSize) {
1960                 c->basew = size.base_width;
1961                 c->baseh = size.base_height;
1962         } else if (size.flags & PMinSize) {
1963                 c->basew = size.min_width;
1964                 c->baseh = size.min_height;
1965         } else
1966                 c->basew = c->baseh = 0;
1967         if (size.flags & PResizeInc) {
1968                 c->incw = size.width_inc;
1969                 c->inch = size.height_inc;
1970         } else
1971                 c->incw = c->inch = 0;
1972         if (size.flags & PMaxSize) {
1973                 c->maxw = size.max_width;
1974                 c->maxh = size.max_height;
1975         } else
1976                 c->maxw = c->maxh = 0;
1977         if (size.flags & PMinSize) {
1978                 c->minw = size.min_width;
1979                 c->minh = size.min_height;
1980         } else if (size.flags & PBaseSize) {
1981                 c->minw = size.base_width;
1982                 c->minh = size.base_height;
1983         } else
1984                 c->minw = c->minh = 0;
1985         if (size.flags & PAspect) {
1986                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1987                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1988         } else
1989                 c->maxa = c->mina = 0.0;
1990         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1991                      && c->maxw == c->minw && c->maxh == c->minh);
1992 }
1993
1994 void
1995 updatetitle(Client *c)
1996 {
1997         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1998                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1999         if (c->name[0] == '\0') /* hack to mark broken clients */
2000                 strcpy(c->name, broken);
2001 }
2002
2003 void
2004 updatestatus(void)
2005 {
2006         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2007                 strcpy(stext, "dwm-"VERSION);
2008         drawbar(selmon);
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         scan();
2148         run();
2149         cleanup();
2150         XCloseDisplay(dpy);
2151         return EXIT_SUCCESS;
2152 }