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 #include <X11/Xlib-xcb.h>
  44 #include <xcb/res.h>
  45 #ifdef __OpenBSD__
  46 #include <sys/sysctl.h>
  47 #include <kvm.h>
  48 #endif /* __OpenBSD */
  49
  50 #include "drw.h"
  51 #include "util.h"
  52
  53 /* macros */
  54 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  55 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  56 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  57                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  58 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  59 #define LENGTH(X)               (sizeof X / sizeof X[0])
  60 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  61 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  62 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  63 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  64 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
  65
  66 #define OPAQUE                  0xffU
  67
  68 /* enums */
  69 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  70 enum { SchemeNorm, SchemeSel }; /* color schemes */
  71 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  72        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  73        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  74 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  75 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  76        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  77
  78 typedef union {
  79         int i;
  80         unsigned int ui;
  81         float f;
  82         const void *v;
  83 } Arg;
  84
  85 typedef struct {
  86         unsigned int click;
  87         unsigned int mask;
  88         unsigned int button;
  89         void (*func)(const Arg *arg);
  90         const Arg arg;
  91 } Button;
  92
  93 typedef struct Monitor Monitor;
  94 typedef struct Client Client;
  95 struct Client {
  96         char name[256];
  97         float mina, maxa;
  98         int x, y, w, h;
  99         int oldx, oldy, oldw, oldh;
 100         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
 101         int bw, oldbw;
 102         unsigned int tags;
 103         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, isterminal, noswallow;
 104         pid_t pid;
 105         Client *next;
 106         Client *snext;
 107         Client *swallowing;
 108         Monitor *mon;
 109         Window win;
 110 };
 111
 112 typedef struct {
 113         unsigned int mod;
 114         KeySym keysym;
 115         void (*func)(const Arg *);
 116         const Arg arg;
 117 } Key;
 118
 119 typedef struct {
 120         const char *symbol;
 121         void (*arrange)(Monitor *);
 122 } Layout;
 123
 124 struct Monitor {
 125         char ltsymbol[16];
 126         float mfact;
 127         int nmaster;
 128         int num;
 129         int by;               /* bar geometry */
 130         int mx, my, mw, mh;   /* screen size */
 131         int wx, wy, ww, wh;   /* window area  */
 132         int gappx;            /* gaps between windows */
 133         unsigned int seltags;
 134         unsigned int sellt;
 135         unsigned int tagset[2];
 136         int showbar;
 137         int topbar;
 138         Client *clients;
 139         Client *sel;
 140         Client *stack;
 141         Monitor *next;
 142         Window barwin;
 143         const Layout *lt[2];
 144 };
 145
 146 typedef struct {
 147         const char *class;
 148         const char *instance;
 149         const char *title;
 150         unsigned int tags;
 151         int isfloating;
 152         int isterminal;
 153         int noswallow;
 154         int monitor;
 155 } Rule;
 156
 157 /* function declarations */
 158 static void applyrules(Client *c);
 159 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 160 static void arrange(Monitor *m);
 161 static void arrangemon(Monitor *m);
 162 static void attach(Client *c);
 163 static void attachstack(Client *c);
 164 static void buttonpress(XEvent *e);
 165 static void checkotherwm(void);
 166 static void cleanup(void);
 167 static void cleanupmon(Monitor *mon);
 168 static void clientmessage(XEvent *e);
 169 static void configure(Client *c);
 170 static void configurenotify(XEvent *e);
 171 static void configurerequest(XEvent *e);
 172 static Monitor *createmon(void);
 173 static void destroynotify(XEvent *e);
 174 static void detach(Client *c);
 175 static void detachstack(Client *c);
 176 static Monitor *dirtomon(int dir);
 177 static void drawbar(Monitor *m);
 178 static void drawbars(void);
 179 static void enternotify(XEvent *e);
 180 static void expose(XEvent *e);
 181 static void focus(Client *c);
 182 static void focusin(XEvent *e);
 183 static void focusmon(const Arg *arg);
 184 static void focusstack(const Arg *arg);
 185 static Atom getatomprop(Client *c, Atom prop);
 186 static int getrootptr(int *x, int *y);
 187 static long getstate(Window w);
 188 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 189 static void grabbuttons(Client *c, int focused);
 190 static void grabkeys(void);
 191 static void incnmaster(const Arg *arg);
 192 static void keypress(XEvent *e);
 193 static void killclient(const Arg *arg);
 194 static void manage(Window w, XWindowAttributes *wa);
 195 static void mappingnotify(XEvent *e);
 196 static void maprequest(XEvent *e);
 197 static void monocle(Monitor *m);
 198 static void motionnotify(XEvent *e);
 199 static void movemouse(const Arg *arg);
 200 static Client *nexttiled(Client *c);
 201 static void pop(Client *);
 202 static void propertynotify(XEvent *e);
 203 static void quit(const Arg *arg);
 204 static Monitor *recttomon(int x, int y, int w, int h);
 205 static void resize(Client *c, int x, int y, int w, int h, int interact);
 206 static void resizeclient(Client *c, int x, int y, int w, int h);
 207 static void resizemouse(const Arg *arg);
 208 static void restack(Monitor *m);
 209 static void run(void);
 210 static void scan(void);
 211 static int sendevent(Client *c, Atom proto);
 212 static void sendmon(Client *c, Monitor *m);
 213 static void setclientstate(Client *c, long state);
 214 static void setfocus(Client *c);
 215 static void setfullscreen(Client *c, int fullscreen);
 216 static void setgaps(const Arg *arg);
 217 static void setlayout(const Arg *arg);
 218 static void setmfact(const Arg *arg);
 219 static void setup(void);
 220 static void seturgent(Client *c, int urg);
 221 static void showhide(Client *c);
 222 static void sigchld(int unused);
 223 static void sighup(int unused);
 224 static void sigterm(int unused);
 225 static void spawn(const Arg *arg);
 226 static void tag(const Arg *arg);
 227 static void tagmon(const Arg *arg);
 228 static void tile(Monitor *);
 229 static void togglebar(const Arg *arg);
 230 static void togglefloating(const Arg *arg);
 231 static void toggletag(const Arg *arg);
 232 static void toggleview(const Arg *arg);
 233 static void unfocus(Client *c, int setfocus);
 234 static void unmanage(Client *c, int destroyed);
 235 static void unmapnotify(XEvent *e);
 236 static void updatebarpos(Monitor *m);
 237 static void updatebars(void);
 238 static void updateclientlist(void);
 239 static int updategeom(void);
 240 static void updatenumlockmask(void);
 241 static void updatesizehints(Client *c);
 242 static void updatestatus(void);
 243 static void updatetitle(Client *c);
 244 static void updatewindowtype(Client *c);
 245 static void updatewmhints(Client *c);
 246 static void view(const Arg *arg);
 247 static Client *wintoclient(Window w);
 248 static Monitor *wintomon(Window w);
 249 static int xerror(Display *dpy, XErrorEvent *ee);
 250 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 251 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 252 static void xinitvisual();
 253 static void zoom(const Arg *arg);
 254
 255 static pid_t getparentprocess(pid_t p);
 256 static int isdescprocess(pid_t p, pid_t c);
 257 static Client *swallowingclient(Window w);
 258 static Client *termforwin(const Client *c);
 259 static pid_t winpid(Window w);
 260
 261 /* variables */
 262 static const char broken[] = "broken";
 263 static char stext[256];
 264 static int screen;
 265 static int sw, sh;           /* X display screen geometry width, height */
 266 static int bh, blw = 0;      /* bar geometry */
 267 static int lrpad;            /* sum of left and right padding for text */
 268 static int (*xerrorxlib)(Display *, XErrorEvent *);
 269 static unsigned int numlockmask = 0;
 270 static void (*handler[LASTEvent]) (XEvent *) = {
 271         [ButtonPress] = buttonpress,
 272         [ClientMessage] = clientmessage,
 273         [ConfigureRequest] = configurerequest,
 274         [ConfigureNotify] = configurenotify,
 275         [DestroyNotify] = destroynotify,
 276         [EnterNotify] = enternotify,
 277         [Expose] = expose,
 278         [FocusIn] = focusin,
 279         [KeyPress] = keypress,
 280         [MappingNotify] = mappingnotify,
 281         [MapRequest] = maprequest,
 282         [MotionNotify] = motionnotify,
 283         [PropertyNotify] = propertynotify,
 284         [UnmapNotify] = unmapnotify
 285 };
 286 static Atom wmatom[WMLast], netatom[NetLast];
 287 static int restart = 0;
 288 static int running = 1;
 289 static Cur *cursor[CurLast];
 290 static Clr **scheme;
 291 static Display *dpy;
 292 static Drw *drw;
 293 static Monitor *mons, *selmon;
 294 static Window root, wmcheckwin;
 295
 296 static xcb_connection_t *xcon;
 297
 298 static int useargb = 0;
 299 static Visual *visual;
 300 static int depth;
 301 static Colormap cmap;
 302
 303 /* configuration, allows nested code to access above variables */
 304 #include "config.h"
 305
 306 /* compile-time check if all tags fit into an unsigned int bit array. */
 307 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 308
 309 /* function implementations */
 310 void
 311 applyrules(Client *c)
 312 {
 313         const char *class, *instance;
 314         unsigned int i;
 315         const Rule *r;
 316         Monitor *m;
 317         XClassHint ch = { NULL, NULL };
 318
 319         /* rule matching */
 320         c->isfloating = 0;
 321         c->tags = 0;
 322         XGetClassHint(dpy, c->win, &ch);
 323         class    = ch.res_class ? ch.res_class : broken;
 324         instance = ch.res_name  ? ch.res_name  : broken;
 325
 326         for (i = 0; i < LENGTH(rules); i++) {
 327                 r = &rules[i];
 328                 if ((!r->title || strstr(c->name, r->title))
 329                 && (!r->class || strstr(class, r->class))
 330                 && (!r->instance || strstr(instance, r->instance)))
 331                 {
 332                         c->isterminal = r->isterminal;
 333                         c->noswallow  = r->noswallow;
 334                         c->isfloating = r->isfloating;
 335                         c->tags |= r->tags;
 336                         for (m = mons; m && m->num != r->monitor; m = m->next);
 337                         if (m)
 338                                 c->mon = m;
 339                 }
 340         }
 341         if (ch.res_class)
 342                 XFree(ch.res_class);
 343         if (ch.res_name)
 344                 XFree(ch.res_name);
 345         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 346 }
 347
 348 int
 349 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 350 {
 351         int baseismin;
 352         Monitor *m = c->mon;
 353
 354         /* set minimum possible */
 355         *w = MAX(1, *w);
 356         *h = MAX(1, *h);
 357         if (interact) {
 358                 if (*x > sw)
 359                         *x = sw - WIDTH(c);
 360                 if (*y > sh)
 361                         *y = sh - HEIGHT(c);
 362                 if (*x + *w + 2 * c->bw < 0)
 363                         *x = 0;
 364                 if (*y + *h + 2 * c->bw < 0)
 365                         *y = 0;
 366         } else {
 367                 if (*x >= m->wx + m->ww)
 368                         *x = m->wx + m->ww - WIDTH(c);
 369                 if (*y >= m->wy + m->wh)
 370                         *y = m->wy + m->wh - HEIGHT(c);
 371                 if (*x + *w + 2 * c->bw <= m->wx)
 372                         *x = m->wx;
 373                 if (*y + *h + 2 * c->bw <= m->wy)
 374                         *y = m->wy;
 375         }
 376         if (*h < bh)
 377                 *h = bh;
 378         if (*w < bh)
 379                 *w = bh;
 380         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 381                 /* see last two sentences in ICCCM 4.1.2.3 */
 382                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 383                 if (!baseismin) { /* temporarily remove base dimensions */
 384                         *w -= c->basew;
 385                         *h -= c->baseh;
 386                 }
 387                 /* adjust for aspect limits */
 388                 if (c->mina > 0 && c->maxa > 0) {
 389                         if (c->maxa < (float)*w / *h)
 390                                 *w = *h * c->maxa + 0.5;
 391                         else if (c->mina < (float)*h / *w)
 392                                 *h = *w * c->mina + 0.5;
 393                 }
 394                 if (baseismin) { /* increment calculation requires this */
 395                         *w -= c->basew;
 396                         *h -= c->baseh;
 397                 }
 398                 /* adjust for increment value */
 399                 if (c->incw)
 400                         *w -= *w % c->incw;
 401                 if (c->inch)
 402                         *h -= *h % c->inch;
 403                 /* restore base dimensions */
 404                 *w = MAX(*w + c->basew, c->minw);
 405                 *h = MAX(*h + c->baseh, c->minh);
 406                 if (c->maxw)
 407                         *w = MIN(*w, c->maxw);
 408                 if (c->maxh)
 409                         *h = MIN(*h, c->maxh);
 410         }
 411         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 412 }
 413
 414 void
 415 arrange(Monitor *m)
 416 {
 417         if (m)
 418                 showhide(m->stack);
 419         else for (m = mons; m; m = m->next)
 420                 showhide(m->stack);
 421         if (m) {
 422                 arrangemon(m);
 423                 restack(m);
 424         } else for (m = mons; m; m = m->next)
 425                 arrangemon(m);
 426 }
 427
 428 void
 429 arrangemon(Monitor *m)
 430 {
 431         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 432         if (m->lt[m->sellt]->arrange)
 433                 m->lt[m->sellt]->arrange(m);
 434 }
 435
 436 void
 437 attach(Client *c)
 438 {
 439         c->next = c->mon->clients;
 440         c->mon->clients = c;
 441 }
 442
 443 void
 444 attachstack(Client *c)
 445 {
 446         c->snext = c->mon->stack;
 447         c->mon->stack = c;
 448 }
 449
 450 void
 451 swallow(Client *p, Client *c)
 452 {
 453
 454         if (c->noswallow || c->isterminal)
 455                 return;
 456         if (c->noswallow && !swallowfloating && c->isfloating)
 457                 return;
 458
 459         detach(c);
 460         detachstack(c);
 461
 462         setclientstate(c, WithdrawnState);
 463         XUnmapWindow(dpy, p->win);
 464
 465         p->swallowing = c;
 466         c->mon = p->mon;
 467
 468         Window w = p->win;
 469         p->win = c->win;
 470         c->win = w;
 471         updatetitle(p);
 472         XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
 473         arrange(p->mon);
 474         configure(p);
 475         updateclientlist();
 476 }
 477
 478 void
 479 unswallow(Client *c)
 480 {
 481         c->win = c->swallowing->win;
 482
 483         free(c->swallowing);
 484         c->swallowing = NULL;
 485
 486         /* unfullscreen the client */
 487         setfullscreen(c, 0);
 488         updatetitle(c);
 489         arrange(c->mon);
 490         XMapWindow(dpy, c->win);
 491         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 492         setclientstate(c, NormalState);
 493         focus(NULL);
 494         arrange(c->mon);
 495 }
 496
 497 void
 498 buttonpress(XEvent *e)
 499 {
 500         unsigned int i, x, click;
 501         Arg arg = {0};
 502         Client *c;
 503         Monitor *m;
 504         XButtonPressedEvent *ev = &e->xbutton;
 505
 506         click = ClkRootWin;
 507         /* focus monitor if necessary */
 508         if ((m = wintomon(ev->window)) && m != selmon) {
 509                 unfocus(selmon->sel, 1);
 510                 selmon = m;
 511                 focus(NULL);
 512         }
 513         if (ev->window == selmon->barwin) {
 514                 i = x = 0;
 515                 do
 516                         x += TEXTW(tags[i]);
 517                 while (ev->x >= x && ++i < LENGTH(tags));
 518                 if (i < LENGTH(tags)) {
 519                         click = ClkTagBar;
 520                         arg.ui = 1 << i;
 521                 } else if (ev->x < x + blw)
 522                         click = ClkLtSymbol;
 523                 else if (ev->x > selmon->ww - (int)TEXTW(stext))
 524                         click = ClkStatusText;
 525                 else
 526                         click = ClkWinTitle;
 527         } else if ((c = wintoclient(ev->window))) {
 528                 focus(c);
 529                 restack(selmon);
 530                 XAllowEvents(dpy, ReplayPointer, CurrentTime);
 531                 click = ClkClientWin;
 532         }
 533         for (i = 0; i < LENGTH(buttons); i++)
 534                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 535                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 536                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 537 }
 538
 539 void
 540 checkotherwm(void)
 541 {
 542         xerrorxlib = XSetErrorHandler(xerrorstart);
 543         /* this causes an error if some other window manager is running */
 544         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 545         XSync(dpy, False);
 546         XSetErrorHandler(xerror);
 547         XSync(dpy, False);
 548 }
 549
 550 void
 551 cleanup(void)
 552 {
 553         Arg a = {.ui = ~0};
 554         Layout foo = { "", NULL };
 555         Monitor *m;
 556         size_t i;
 557
 558         view(&a);
 559         selmon->lt[selmon->sellt] = &foo;
 560         for (m = mons; m; m = m->next)
 561                 while (m->stack)
 562                         unmanage(m->stack, 0);
 563         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 564         while (mons)
 565                 cleanupmon(mons);
 566         for (i = 0; i < CurLast; i++)
 567                 drw_cur_free(drw, cursor[i]);
 568         for (i = 0; i < LENGTH(colors); i++)
 569                 free(scheme[i]);
 570         free(scheme);
 571         XDestroyWindow(dpy, wmcheckwin);
 572         drw_free(drw);
 573         XSync(dpy, False);
 574         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 575         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 576 }
 577
 578 void
 579 cleanupmon(Monitor *mon)
 580 {
 581         Monitor *m;
 582
 583         if (mon == mons)
 584                 mons = mons->next;
 585         else {
 586                 for (m = mons; m && m->next != mon; m = m->next);
 587                 m->next = mon->next;
 588         }
 589         XUnmapWindow(dpy, mon->barwin);
 590         XDestroyWindow(dpy, mon->barwin);
 591         free(mon);
 592 }
 593
 594 void
 595 clientmessage(XEvent *e)
 596 {
 597         XClientMessageEvent *cme = &e->xclient;
 598         Client *c = wintoclient(cme->window);
 599
 600         if (!c)
 601                 return;
 602         if (cme->message_type == netatom[NetWMState]) {
 603                 if (cme->data.l[1] == netatom[NetWMFullscreen]
 604                 || cme->data.l[2] == netatom[NetWMFullscreen])
 605                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 606                                 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 607         } else if (cme->message_type == netatom[NetActiveWindow]) {
 608                 if (c != selmon->sel && !c->isurgent)
 609                         seturgent(c, 1);
 610         }
 611 }
 612
 613 void
 614 configure(Client *c)
 615 {
 616         XConfigureEvent ce;
 617
 618         ce.type = ConfigureNotify;
 619         ce.display = dpy;
 620         ce.event = c->win;
 621         ce.window = c->win;
 622         ce.x = c->x;
 623         ce.y = c->y;
 624         ce.width = c->w;
 625         ce.height = c->h;
 626         ce.border_width = c->bw;
 627         ce.above = None;
 628         ce.override_redirect = False;
 629         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 630 }
 631
 632 void
 633 configurenotify(XEvent *e)
 634 {
 635         Monitor *m;
 636         Client *c;
 637         XConfigureEvent *ev = &e->xconfigure;
 638         int dirty;
 639
 640         /* TODO: updategeom handling sucks, needs to be simplified */
 641         if (ev->window == root) {
 642                 dirty = (sw != ev->width || sh != ev->height);
 643                 sw = ev->width;
 644                 sh = ev->height;
 645                 if (updategeom() || dirty) {
 646                         drw_resize(drw, sw, bh);
 647                         updatebars();
 648                         for (m = mons; m; m = m->next) {
 649                                 for (c = m->clients; c; c = c->next)
 650                                         if (c->isfullscreen)
 651                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 652                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 653                         }
 654                         focus(NULL);
 655                         arrange(NULL);
 656                 }
 657         }
 658 }
 659
 660 void
 661 configurerequest(XEvent *e)
 662 {
 663         Client *c;
 664         Monitor *m;
 665         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 666         XWindowChanges wc;
 667
 668         if ((c = wintoclient(ev->window))) {
 669                 if (ev->value_mask & CWBorderWidth)
 670                         c->bw = ev->border_width;
 671                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 672                         m = c->mon;
 673                         if (ev->value_mask & CWX) {
 674                                 c->oldx = c->x;
 675                                 c->x = m->mx + ev->x;
 676                         }
 677                         if (ev->value_mask & CWY) {
 678                                 c->oldy = c->y;
 679                                 c->y = m->my + ev->y;
 680                         }
 681                         if (ev->value_mask & CWWidth) {
 682                                 c->oldw = c->w;
 683                                 c->w = ev->width;
 684                         }
 685                         if (ev->value_mask & CWHeight) {
 686                                 c->oldh = c->h;
 687                                 c->h = ev->height;
 688                         }
 689                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 690                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 691                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 692                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 693                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 694                                 configure(c);
 695                         if (ISVISIBLE(c))
 696                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 697                 } else
 698                         configure(c);
 699         } else {
 700                 wc.x = ev->x;
 701                 wc.y = ev->y;
 702                 wc.width = ev->width;
 703                 wc.height = ev->height;
 704                 wc.border_width = ev->border_width;
 705                 wc.sibling = ev->above;
 706                 wc.stack_mode = ev->detail;
 707                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 708         }
 709         XSync(dpy, False);
 710 }
 711
 712 Monitor *
 713 createmon(void)
 714 {
 715         Monitor *m;
 716
 717         m = ecalloc(1, sizeof(Monitor));
 718         m->tagset[0] = m->tagset[1] = 1;
 719         m->mfact = mfact;
 720         m->nmaster = nmaster;
 721         m->showbar = showbar;
 722         m->topbar = topbar;
 723         m->gappx = gappx;
 724         m->lt[0] = &layouts[0];
 725         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 726         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 727         return m;
 728 }
 729
 730 void
 731 destroynotify(XEvent *e)
 732 {
 733         Client *c;
 734         XDestroyWindowEvent *ev = &e->xdestroywindow;
 735
 736         if ((c = wintoclient(ev->window)))
 737                 unmanage(c, 1);
 738
 739         else if ((c = swallowingclient(ev->window)))
 740                 unmanage(c->swallowing, 1);
 741 }
 742
 743 void
 744 detach(Client *c)
 745 {
 746         Client **tc;
 747
 748         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 749         *tc = c->next;
 750 }
 751
 752 void
 753 detachstack(Client *c)
 754 {
 755         Client **tc, *t;
 756
 757         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 758         *tc = c->snext;
 759
 760         if (c == c->mon->sel) {
 761                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 762                 c->mon->sel = t;
 763         }
 764 }
 765
 766 Monitor *
 767 dirtomon(int dir)
 768 {
 769         Monitor *m = NULL;
 770
 771         if (dir > 0) {
 772                 if (!(m = selmon->next))
 773                         m = mons;
 774         } else if (selmon == mons)
 775                 for (m = mons; m->next; m = m->next);
 776         else
 777                 for (m = mons; m->next != selmon; m = m->next);
 778         return m;
 779 }
 780
 781 void
 782 drawbar(Monitor *m)
 783 {
 784         int x, w, tw = 0;
 785         int boxs = drw->fonts->h / 9;
 786         int boxw = drw->fonts->h / 6 + 2;
 787         unsigned int i, occ = 0, urg = 0;
 788         Client *c;
 789
 790         if (!m->showbar)
 791                 return;
 792
 793         /* draw status first so it can be overdrawn by tags later */
 794         if (m == selmon) { /* status is only drawn on selected monitor */
 795                 drw_setscheme(drw, scheme[SchemeNorm]);
 796                 tw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 797                 drw_text(drw, m->ww - tw, 0, tw, bh, 0, stext, 0);
 798         }
 799
 800         for (c = m->clients; c; c = c->next) {
 801                 occ |= c->tags;
 802                 if (c->isurgent)
 803                         urg |= c->tags;
 804         }
 805         x = 0;
 806         for (i = 0; i < LENGTH(tags); i++) {
 807                 w = TEXTW(tags[i]);
 808                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 809                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 810                 if (occ & 1 << i)
 811                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 812                                 m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 813                                 urg & 1 << i);
 814                 x += w;
 815         }
 816         w = blw = TEXTW(m->ltsymbol);
 817         drw_setscheme(drw, scheme[SchemeNorm]);
 818         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 819
 820         if ((w = m->ww - tw - x) > bh) {
 821                 if (m->sel) {
 822                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 823                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 824                         if (m->sel->isfloating)
 825                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 826                 } else {
 827                         drw_setscheme(drw, scheme[SchemeNorm]);
 828                         drw_rect(drw, x, 0, w, bh, 1, 1);
 829                 }
 830         }
 831         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 832 }
 833
 834 void
 835 drawbars(void)
 836 {
 837         Monitor *m;
 838
 839         for (m = mons; m; m = m->next)
 840                 drawbar(m);
 841 }
 842
 843 void
 844 enternotify(XEvent *e)
 845 {
 846         Client *c;
 847         Monitor *m;
 848         XCrossingEvent *ev = &e->xcrossing;
 849
 850         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 851                 return;
 852         c = wintoclient(ev->window);
 853         m = c ? c->mon : wintomon(ev->window);
 854         if (m != selmon) {
 855                 unfocus(selmon->sel, 1);
 856                 selmon = m;
 857         } else if (!c || c == selmon->sel)
 858                 return;
 859         focus(c);
 860 }
 861
 862 void
 863 expose(XEvent *e)
 864 {
 865         Monitor *m;
 866         XExposeEvent *ev = &e->xexpose;
 867
 868         if (ev->count == 0 && (m = wintomon(ev->window)))
 869                 drawbar(m);
 870 }
 871
 872 void
 873 focus(Client *c)
 874 {
 875         if (!c || !ISVISIBLE(c))
 876                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 877         if (selmon->sel && selmon->sel != c)
 878                 unfocus(selmon->sel, 0);
 879         if (c) {
 880                 if (c->mon != selmon)
 881                         selmon = c->mon;
 882                 if (c->isurgent)
 883                         seturgent(c, 0);
 884                 detachstack(c);
 885                 attachstack(c);
 886                 grabbuttons(c, 1);
 887                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 888                 setfocus(c);
 889         } else {
 890                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 891                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 892         }
 893         selmon->sel = c;
 894         drawbars();
 895 }
 896
 897 /* there are some broken focus acquiring clients needing extra handling */
 898 void
 899 focusin(XEvent *e)
 900 {
 901         XFocusChangeEvent *ev = &e->xfocus;
 902
 903         if (selmon->sel && ev->window != selmon->sel->win)
 904                 setfocus(selmon->sel);
 905 }
 906
 907 void
 908 focusmon(const Arg *arg)
 909 {
 910         Monitor *m;
 911
 912         if (!mons->next)
 913                 return;
 914         if ((m = dirtomon(arg->i)) == selmon)
 915                 return;
 916         unfocus(selmon->sel, 0);
 917         selmon = m;
 918         focus(NULL);
 919 }
 920
 921 void
 922 focusstack(const Arg *arg)
 923 {
 924         Client *c = NULL, *i;
 925
 926         if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
 927                 return;
 928         if (arg->i > 0) {
 929                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 930                 if (!c)
 931                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 932         } else {
 933                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 934                         if (ISVISIBLE(i))
 935                                 c = i;
 936                 if (!c)
 937                         for (; i; i = i->next)
 938                                 if (ISVISIBLE(i))
 939                                         c = i;
 940         }
 941         if (c) {
 942                 focus(c);
 943                 restack(selmon);
 944         }
 945 }
 946
 947 Atom
 948 getatomprop(Client *c, Atom prop)
 949 {
 950         int di;
 951         unsigned long dl;
 952         unsigned char *p = NULL;
 953         Atom da, atom = None;
 954
 955         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 956                 &da, &di, &dl, &dl, &p) == Success && p) {
 957                 atom = *(Atom *)p;
 958                 XFree(p);
 959         }
 960         return atom;
 961 }
 962
 963 int
 964 getrootptr(int *x, int *y)
 965 {
 966         int di;
 967         unsigned int dui;
 968         Window dummy;
 969
 970         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 971 }
 972
 973 long
 974 getstate(Window w)
 975 {
 976         int format;
 977         long result = -1;
 978         unsigned char *p = NULL;
 979         unsigned long n, extra;
 980         Atom real;
 981
 982         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 983                 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 984                 return -1;
 985         if (n != 0)
 986                 result = *p;
 987         XFree(p);
 988         return result;
 989 }
 990
 991 int
 992 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 993 {
 994         char **list = NULL;
 995         int n;
 996         XTextProperty name;
 997
 998         if (!text || size == 0)
 999                 return 0;
1000         text[0] = '\0';
1001         if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
1002                 return 0;
1003         if (name.encoding == XA_STRING)
1004                 strncpy(text, (char *)name.value, size - 1);
1005         else {
1006                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1007                         strncpy(text, *list, size - 1);
1008                         XFreeStringList(list);
1009                 }
1010         }
1011         text[size - 1] = '\0';
1012         XFree(name.value);
1013         return 1;
1014 }
1015
1016 void
1017 grabbuttons(Client *c, int focused)
1018 {
1019         updatenumlockmask();
1020         {
1021                 unsigned int i, j;
1022                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1023                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1024                 if (!focused)
1025                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1026                                 BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
1027                 for (i = 0; i < LENGTH(buttons); i++)
1028                         if (buttons[i].click == ClkClientWin)
1029                                 for (j = 0; j < LENGTH(modifiers); j++)
1030                                         XGrabButton(dpy, buttons[i].button,
1031                                                 buttons[i].mask | modifiers[j],
1032                                                 c->win, False, BUTTONMASK,
1033                                                 GrabModeAsync, GrabModeSync, None, None);
1034         }
1035 }
1036
1037 void
1038 grabkeys(void)
1039 {
1040         updatenumlockmask();
1041         {
1042                 unsigned int i, j;
1043                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1044                 KeyCode code;
1045
1046                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1047                 for (i = 0; i < LENGTH(keys); i++)
1048                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1049                                 for (j = 0; j < LENGTH(modifiers); j++)
1050                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1051                                                 True, GrabModeAsync, GrabModeAsync);
1052         }
1053 }
1054
1055 void
1056 incnmaster(const Arg *arg)
1057 {
1058         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1059         arrange(selmon);
1060 }
1061
1062 #ifdef XINERAMA
1063 static int
1064 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
1065 {
1066         while (n--)
1067                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1068                 && unique[n].width == info->width && unique[n].height == info->height)
1069                         return 0;
1070         return 1;
1071 }
1072 #endif /* XINERAMA */
1073
1074 void
1075 keypress(XEvent *e)
1076 {
1077         unsigned int i;
1078         KeySym keysym;
1079         XKeyEvent *ev;
1080
1081         ev = &e->xkey;
1082         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1083         for (i = 0; i < LENGTH(keys); i++)
1084                 if (keysym == keys[i].keysym
1085                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1086                 && keys[i].func)
1087                         keys[i].func(&(keys[i].arg));
1088 }
1089
1090 void
1091 killclient(const Arg *arg)
1092 {
1093         if (!selmon->sel)
1094                 return;
1095         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1096                 XGrabServer(dpy);
1097                 XSetErrorHandler(xerrordummy);
1098                 XSetCloseDownMode(dpy, DestroyAll);
1099                 XKillClient(dpy, selmon->sel->win);
1100                 XSync(dpy, False);
1101                 XSetErrorHandler(xerror);
1102                 XUngrabServer(dpy);
1103         }
1104 }
1105
1106 void
1107 manage(Window w, XWindowAttributes *wa)
1108 {
1109         Client *c, *t = NULL, *term = NULL;
1110         Window trans = None;
1111         XWindowChanges wc;
1112
1113         c = ecalloc(1, sizeof(Client));
1114         c->win = w;
1115         c->pid = winpid(w);
1116         /* geometry */
1117         c->x = c->oldx = wa->x;
1118         c->y = c->oldy = wa->y;
1119         c->w = c->oldw = wa->width;
1120         c->h = c->oldh = wa->height;
1121         c->oldbw = wa->border_width;
1122
1123         updatetitle(c);
1124         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1125                 c->mon = t->mon;
1126                 c->tags = t->tags;
1127         } else {
1128                 c->mon = selmon;
1129                 applyrules(c);
1130                 term = termforwin(c);
1131         }
1132
1133         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1134                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1135         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1136                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1137         c->x = MAX(c->x, c->mon->mx);
1138         /* only fix client y-offset, if the client center might cover the bar */
1139         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1140                 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1141         c->bw = borderpx;
1142
1143         wc.border_width = c->bw;
1144         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1145         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1146         configure(c); /* propagates border_width, if size doesn't change */
1147         updatewindowtype(c);
1148         updatesizehints(c);
1149         updatewmhints(c);
1150         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1151         grabbuttons(c, 0);
1152         if (!c->isfloating)
1153                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1154         if (c->isfloating)
1155                 XRaiseWindow(dpy, c->win);
1156         attach(c);
1157         attachstack(c);
1158         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1159                 (unsigned char *) &(c->win), 1);
1160         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1161         setclientstate(c, NormalState);
1162         if (c->mon == selmon)
1163                 unfocus(selmon->sel, 0);
1164         c->mon->sel = c;
1165         arrange(c->mon);
1166         XMapWindow(dpy, c->win);
1167         if (term)
1168                 swallow(term, c);
1169         focus(NULL);
1170 }
1171
1172 void
1173 mappingnotify(XEvent *e)
1174 {
1175         XMappingEvent *ev = &e->xmapping;
1176
1177         XRefreshKeyboardMapping(ev);
1178         if (ev->request == MappingKeyboard)
1179                 grabkeys();
1180 }
1181
1182 void
1183 maprequest(XEvent *e)
1184 {
1185         static XWindowAttributes wa;
1186         XMapRequestEvent *ev = &e->xmaprequest;
1187
1188         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1189                 return;
1190         if (wa.override_redirect)
1191                 return;
1192         if (!wintoclient(ev->window))
1193                 manage(ev->window, &wa);
1194 }
1195
1196 void
1197 monocle(Monitor *m)
1198 {
1199         unsigned int n = 0;
1200         Client *c;
1201
1202         for (c = m->clients; c; c = c->next)
1203                 if (ISVISIBLE(c))
1204                         n++;
1205         if (n > 0) /* override layout symbol */
1206                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1207         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1208                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1209 }
1210
1211 void
1212 motionnotify(XEvent *e)
1213 {
1214         static Monitor *mon = NULL;
1215         Monitor *m;
1216         XMotionEvent *ev = &e->xmotion;
1217
1218         if (ev->window != root)
1219                 return;
1220         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1221                 unfocus(selmon->sel, 1);
1222                 selmon = m;
1223                 focus(NULL);
1224         }
1225         mon = m;
1226 }
1227
1228 void
1229 movemouse(const Arg *arg)
1230 {
1231         int x, y, ocx, ocy, nx, ny;
1232         Client *c;
1233         Monitor *m;
1234         XEvent ev;
1235         Time lasttime = 0;
1236
1237         if (!(c = selmon->sel))
1238                 return;
1239         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1240                 return;
1241         restack(selmon);
1242         ocx = c->x;
1243         ocy = c->y;
1244         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1245                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1246                 return;
1247         if (!getrootptr(&x, &y))
1248                 return;
1249         do {
1250                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1251                 switch(ev.type) {
1252                 case ConfigureRequest:
1253                 case Expose:
1254                 case MapRequest:
1255                         handler[ev.type](&ev);
1256                         break;
1257                 case MotionNotify:
1258                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1259                                 continue;
1260                         lasttime = ev.xmotion.time;
1261
1262                         nx = ocx + (ev.xmotion.x - x);
1263                         ny = ocy + (ev.xmotion.y - y);
1264                         if (abs(selmon->wx - nx) < snap)
1265                                 nx = selmon->wx;
1266                         else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1267                                 nx = selmon->wx + selmon->ww - WIDTH(c);
1268                         if (abs(selmon->wy - ny) < snap)
1269                                 ny = selmon->wy;
1270                         else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1271                                 ny = selmon->wy + selmon->wh - HEIGHT(c);
1272                         if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1273                         && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1274                                 togglefloating(NULL);
1275                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1276                                 resize(c, nx, ny, c->w, c->h, 1);
1277                         break;
1278                 }
1279         } while (ev.type != ButtonRelease);
1280         XUngrabPointer(dpy, CurrentTime);
1281         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1282                 sendmon(c, m);
1283                 selmon = m;
1284                 focus(NULL);
1285         }
1286 }
1287
1288 Client *
1289 nexttiled(Client *c)
1290 {
1291         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1292         return c;
1293 }
1294
1295 void
1296 pop(Client *c)
1297 {
1298         detach(c);
1299         attach(c);
1300         focus(c);
1301         arrange(c->mon);
1302 }
1303
1304 void
1305 propertynotify(XEvent *e)
1306 {
1307         Client *c;
1308         Window trans;
1309         XPropertyEvent *ev = &e->xproperty;
1310
1311         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1312                 updatestatus();
1313         else if (ev->state == PropertyDelete)
1314                 return; /* ignore */
1315         else if ((c = wintoclient(ev->window))) {
1316                 switch(ev->atom) {
1317                 default: break;
1318                 case XA_WM_TRANSIENT_FOR:
1319                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1320                                 (c->isfloating = (wintoclient(trans)) != NULL))
1321                                 arrange(c->mon);
1322                         break;
1323                 case XA_WM_NORMAL_HINTS:
1324                         updatesizehints(c);
1325                         break;
1326                 case XA_WM_HINTS:
1327                         updatewmhints(c);
1328                         drawbars();
1329                         break;
1330                 }
1331                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1332                         updatetitle(c);
1333                         if (c == c->mon->sel)
1334                                 drawbar(c->mon);
1335                 }
1336                 if (ev->atom == netatom[NetWMWindowType])
1337                         updatewindowtype(c);
1338         }
1339 }
1340
1341 void
1342 quit(const Arg *arg)
1343 {
1344         if(arg->i) restart = 1;
1345         running = 0;
1346 }
1347
1348 Monitor *
1349 recttomon(int x, int y, int w, int h)
1350 {
1351         Monitor *m, *r = selmon;
1352         int a, area = 0;
1353
1354         for (m = mons; m; m = m->next)
1355                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1356                         area = a;
1357                         r = m;
1358                 }
1359         return r;
1360 }
1361
1362 void
1363 resize(Client *c, int x, int y, int w, int h, int interact)
1364 {
1365         if (applysizehints(c, &x, &y, &w, &h, interact))
1366                 resizeclient(c, x, y, w, h);
1367 }
1368
1369 void
1370 resizeclient(Client *c, int x, int y, int w, int h)
1371 {
1372         XWindowChanges wc;
1373
1374         c->oldx = c->x; c->x = wc.x = x;
1375         c->oldy = c->y; c->y = wc.y = y;
1376         c->oldw = c->w; c->w = wc.width = w;
1377         c->oldh = c->h; c->h = wc.height = h;
1378         wc.border_width = c->bw;
1379         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1380         configure(c);
1381         XSync(dpy, False);
1382 }
1383
1384 void
1385 resizemouse(const Arg *arg)
1386 {
1387         int ocx, ocy, nw, nh;
1388         Client *c;
1389         Monitor *m;
1390         XEvent ev;
1391         Time lasttime = 0;
1392
1393         if (!(c = selmon->sel))
1394                 return;
1395         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1396                 return;
1397         restack(selmon);
1398         ocx = c->x;
1399         ocy = c->y;
1400         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1401                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1402                 return;
1403         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1404         do {
1405                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1406                 switch(ev.type) {
1407                 case ConfigureRequest:
1408                 case Expose:
1409                 case MapRequest:
1410                         handler[ev.type](&ev);
1411                         break;
1412                 case MotionNotify:
1413                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1414                                 continue;
1415                         lasttime = ev.xmotion.time;
1416
1417                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1418                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1419                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1420                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1421                         {
1422                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1423                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1424                                         togglefloating(NULL);
1425                         }
1426                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1427                                 resize(c, c->x, c->y, nw, nh, 1);
1428                         break;
1429                 }
1430         } while (ev.type != ButtonRelease);
1431         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1432         XUngrabPointer(dpy, CurrentTime);
1433         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1434         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1435                 sendmon(c, m);
1436                 selmon = m;
1437                 focus(NULL);
1438         }
1439 }
1440
1441 void
1442 restack(Monitor *m)
1443 {
1444         Client *c;
1445         XEvent ev;
1446         XWindowChanges wc;
1447
1448         drawbar(m);
1449         if (!m->sel)
1450                 return;
1451         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1452                 XRaiseWindow(dpy, m->sel->win);
1453         if (m->lt[m->sellt]->arrange) {
1454                 wc.stack_mode = Below;
1455                 wc.sibling = m->barwin;
1456                 for (c = m->stack; c; c = c->snext)
1457                         if (!c->isfloating && ISVISIBLE(c)) {
1458                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1459                                 wc.sibling = c->win;
1460                         }
1461         }
1462         XSync(dpy, False);
1463         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1464 }
1465
1466 void
1467 run(void)
1468 {
1469         XEvent ev;
1470         /* main event loop */
1471         XSync(dpy, False);
1472         while (running && !XNextEvent(dpy, &ev))
1473                 if (handler[ev.type])
1474                         handler[ev.type](&ev); /* call handler */
1475 }
1476
1477 void
1478 scan(void)
1479 {
1480         unsigned int i, num;
1481         Window d1, d2, *wins = NULL;
1482         XWindowAttributes wa;
1483
1484         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1485                 for (i = 0; i < num; i++) {
1486                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1487                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1488                                 continue;
1489                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1490                                 manage(wins[i], &wa);
1491                 }
1492                 for (i = 0; i < num; i++) { /* now the transients */
1493                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1494                                 continue;
1495                         if (XGetTransientForHint(dpy, wins[i], &d1)
1496                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1497                                 manage(wins[i], &wa);
1498                 }
1499                 if (wins)
1500                         XFree(wins);
1501         }
1502 }
1503
1504 void
1505 sendmon(Client *c, Monitor *m)
1506 {
1507         if (c->mon == m)
1508                 return;
1509         unfocus(c, 1);
1510         detach(c);
1511         detachstack(c);
1512         c->mon = m;
1513         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1514         attach(c);
1515         attachstack(c);
1516         focus(NULL);
1517         arrange(NULL);
1518 }
1519
1520 void
1521 setclientstate(Client *c, long state)
1522 {
1523         long data[] = { state, None };
1524
1525         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1526                 PropModeReplace, (unsigned char *)data, 2);
1527 }
1528
1529 int
1530 sendevent(Client *c, Atom proto)
1531 {
1532         int n;
1533         Atom *protocols;
1534         int exists = 0;
1535         XEvent ev;
1536
1537         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1538                 while (!exists && n--)
1539                         exists = protocols[n] == proto;
1540                 XFree(protocols);
1541         }
1542         if (exists) {
1543                 ev.type = ClientMessage;
1544                 ev.xclient.window = c->win;
1545                 ev.xclient.message_type = wmatom[WMProtocols];
1546                 ev.xclient.format = 32;
1547                 ev.xclient.data.l[0] = proto;
1548                 ev.xclient.data.l[1] = CurrentTime;
1549                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1550         }
1551         return exists;
1552 }
1553
1554 void
1555 setfocus(Client *c)
1556 {
1557         if (!c->neverfocus) {
1558                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1559                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1560                         XA_WINDOW, 32, PropModeReplace,
1561                         (unsigned char *) &(c->win), 1);
1562         }
1563         sendevent(c, wmatom[WMTakeFocus]);
1564 }
1565
1566 void
1567 setfullscreen(Client *c, int fullscreen)
1568 {
1569         if (fullscreen && !c->isfullscreen) {
1570                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1571                         PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1572                 c->isfullscreen = 1;
1573                 c->oldstate = c->isfloating;
1574                 c->oldbw = c->bw;
1575                 c->bw = 0;
1576                 c->isfloating = 1;
1577                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1578                 XRaiseWindow(dpy, c->win);
1579         } else if (!fullscreen && c->isfullscreen){
1580                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1581                         PropModeReplace, (unsigned char*)0, 0);
1582                 c->isfullscreen = 0;
1583                 c->isfloating = c->oldstate;
1584                 c->bw = c->oldbw;
1585                 c->x = c->oldx;
1586                 c->y = c->oldy;
1587                 c->w = c->oldw;
1588                 c->h = c->oldh;
1589                 resizeclient(c, c->x, c->y, c->w, c->h);
1590                 arrange(c->mon);
1591         }
1592 }
1593
1594 void
1595 setgaps(const Arg *arg)
1596 {
1597         if ((arg->i == 0) || (selmon->gappx + arg->i < 0))
1598                 selmon->gappx = 0;
1599         else
1600                 selmon->gappx += arg->i;
1601         arrange(selmon);
1602 }
1603
1604 void
1605 setlayout(const Arg *arg)
1606 {
1607         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1608                 selmon->sellt ^= 1;
1609         if (arg && arg->v)
1610                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1611         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1612         if (selmon->sel)
1613                 arrange(selmon);
1614         else
1615                 drawbar(selmon);
1616 }
1617
1618 /* arg > 1.0 will set mfact absolutely */
1619 void
1620 setmfact(const Arg *arg)
1621 {
1622         float f;
1623
1624         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1625                 return;
1626         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1627         if (f < 0.05 || f > 0.95)
1628                 return;
1629         selmon->mfact = f;
1630         arrange(selmon);
1631 }
1632
1633 void
1634 setup(void)
1635 {
1636         int i;
1637         XSetWindowAttributes wa;
1638         Atom utf8string;
1639
1640         /* clean up any zombies immediately */
1641         sigchld(0);
1642
1643         signal(SIGHUP, sighup);
1644         signal(SIGTERM, sigterm);
1645
1646         /* init screen */
1647         screen = DefaultScreen(dpy);
1648         sw = DisplayWidth(dpy, screen);
1649         sh = DisplayHeight(dpy, screen);
1650         root = RootWindow(dpy, screen);
1651         xinitvisual();
1652         drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap);
1653         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1654                 die("no fonts could be loaded.");
1655         lrpad = drw->fonts->h;
1656         bh = drw->fonts->h + 2;
1657         updategeom();
1658         /* init atoms */
1659         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1660         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1661         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1662         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1663         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1664         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1665         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1666         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1667         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1668         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1669         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1670         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1671         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1672         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1673         /* init cursors */
1674         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1675         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1676         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1677         /* init appearance */
1678         scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
1679         for (i = 0; i < LENGTH(colors); i++)
1680                 scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
1681         /* init bars */
1682         updatebars();
1683         updatestatus();
1684         /* supporting window for NetWMCheck */
1685         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1686         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1687                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1688         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1689                 PropModeReplace, (unsigned char *) "dwm", 3);
1690         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1691                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1692         /* EWMH support per view */
1693         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1694                 PropModeReplace, (unsigned char *) netatom, NetLast);
1695         XDeleteProperty(dpy, root, netatom[NetClientList]);
1696         /* select events */
1697         wa.cursor = cursor[CurNormal]->cursor;
1698         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1699                 |ButtonPressMask|PointerMotionMask|EnterWindowMask
1700                 |LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1701         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1702         XSelectInput(dpy, root, wa.event_mask);
1703         grabkeys();
1704         focus(NULL);
1705 }
1706
1707
1708 void
1709 seturgent(Client *c, int urg)
1710 {
1711         XWMHints *wmh;
1712
1713         c->isurgent = urg;
1714         if (!(wmh = XGetWMHints(dpy, c->win)))
1715                 return;
1716         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1717         XSetWMHints(dpy, c->win, wmh);
1718         XFree(wmh);
1719 }
1720
1721 void
1722 showhide(Client *c)
1723 {
1724         if (!c)
1725                 return;
1726         if (ISVISIBLE(c)) {
1727                 /* show clients top down */
1728                 XMoveWindow(dpy, c->win, c->x, c->y);
1729                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1730                         resize(c, c->x, c->y, c->w, c->h, 0);
1731                 showhide(c->snext);
1732         } else {
1733                 /* hide clients bottom up */
1734                 showhide(c->snext);
1735                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1736         }
1737 }
1738
1739 void
1740 sigchld(int unused)
1741 {
1742         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1743                 die("can't install SIGCHLD handler:");
1744         while (0 < waitpid(-1, NULL, WNOHANG));
1745 }
1746
1747 void
1748 sighup(int unused)
1749 {
1750         Arg a = {.i = 1};
1751         quit(&a);
1752 }
1753
1754 void
1755 sigterm(int unused)
1756 {
1757         Arg a = {.i = 0};
1758         quit(&a);
1759 }
1760
1761 void
1762 spawn(const Arg *arg)
1763 {
1764         if (arg->v == dmenucmd)
1765                 dmenumon[0] = '0' + selmon->num;
1766         if (fork() == 0) {
1767                 if (dpy)
1768                         close(ConnectionNumber(dpy));
1769                 setsid();
1770                 execvp(((char **)arg->v)[0], (char **)arg->v);
1771                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1772                 perror(" failed");
1773                 exit(EXIT_SUCCESS);
1774         }
1775 }
1776
1777 void
1778 tag(const Arg *arg)
1779 {
1780         if (selmon->sel && arg->ui & TAGMASK) {
1781                 selmon->sel->tags = arg->ui & TAGMASK;
1782                 focus(NULL);
1783                 arrange(selmon);
1784         }
1785 }
1786
1787 void
1788 tagmon(const Arg *arg)
1789 {
1790         if (!selmon->sel || !mons->next)
1791                 return;
1792         sendmon(selmon->sel, dirtomon(arg->i));
1793 }
1794
1795 void
1796 tile(Monitor *m)
1797 {
1798         unsigned int i, n, h, mw, my, ty;
1799         Client *c;
1800
1801         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1802         if (n == 0)
1803                 return;
1804
1805         if (n > m->nmaster)
1806                 mw = m->nmaster ? m->ww * m->mfact : 0;
1807         else
1808                 mw = m->ww - m->gappx;
1809         for (i = 0, my = ty = m->gappx, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1810                 if (i < m->nmaster) {
1811                         h = (m->wh - my) / (MIN(n, m->nmaster) - i) - m->gappx;
1812                         resize(c, m->wx + m->gappx, m->wy + my, mw - (2*c->bw) - m->gappx, h - (2*c->bw), 0);
1813                         if (my + HEIGHT(c) + m->gappx < m->wh)
1814                                 my += HEIGHT(c) + m->gappx;
1815                 } else {
1816                         h = (m->wh - ty) / (n - i) - m->gappx;
1817                         resize(c, m->wx + mw + m->gappx, m->wy + ty, m->ww - mw - (2*c->bw) - 2*m->gappx, h - (2*c->bw), 0);
1818                         if (ty + HEIGHT(c) + m->gappx < m->wh)
1819                                 ty += HEIGHT(c) + m->gappx;
1820                 }
1821 }
1822
1823 void
1824 togglebar(const Arg *arg)
1825 {
1826         selmon->showbar = !selmon->showbar;
1827         updatebarpos(selmon);
1828         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1829         arrange(selmon);
1830 }
1831
1832 void
1833 togglefloating(const Arg *arg)
1834 {
1835         if (!selmon->sel)
1836                 return;
1837         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1838                 return;
1839         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1840         if (selmon->sel->isfloating)
1841                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1842                         selmon->sel->w, selmon->sel->h, 0);
1843         arrange(selmon);
1844 }
1845
1846 void
1847 toggletag(const Arg *arg)
1848 {
1849         unsigned int newtags;
1850
1851         if (!selmon->sel)
1852                 return;
1853         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1854         if (newtags) {
1855                 selmon->sel->tags = newtags;
1856                 focus(NULL);
1857                 arrange(selmon);
1858         }
1859 }
1860
1861 void
1862 toggleview(const Arg *arg)
1863 {
1864         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1865
1866         if (newtagset) {
1867                 selmon->tagset[selmon->seltags] = newtagset;
1868                 focus(NULL);
1869                 arrange(selmon);
1870         }
1871 }
1872
1873 void
1874 unfocus(Client *c, int setfocus)
1875 {
1876         if (!c)
1877                 return;
1878         grabbuttons(c, 0);
1879         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1880         if (setfocus) {
1881                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1882                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1883         }
1884 }
1885
1886 void
1887 unmanage(Client *c, int destroyed)
1888 {
1889         Monitor *m = c->mon;
1890         XWindowChanges wc;
1891
1892         if (c->swallowing) {
1893                 unswallow(c);
1894                 return;
1895         }
1896
1897         Client *s = swallowingclient(c->win);
1898         if (s) {
1899                 free(s->swallowing);
1900                 s->swallowing = NULL;
1901                 arrange(m);
1902                 focus(NULL);
1903                 return;
1904         }
1905
1906         detach(c);
1907         detachstack(c);
1908         if (!destroyed) {
1909                 wc.border_width = c->oldbw;
1910                 XGrabServer(dpy); /* avoid race conditions */
1911                 XSetErrorHandler(xerrordummy);
1912                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1913                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1914                 setclientstate(c, WithdrawnState);
1915                 XSync(dpy, False);
1916                 XSetErrorHandler(xerror);
1917                 XUngrabServer(dpy);
1918         }
1919         free(c);
1920
1921         if (!s) {
1922                 arrange(m);
1923                 focus(NULL);
1924                 updateclientlist();
1925         }
1926 }
1927
1928 void
1929 unmapnotify(XEvent *e)
1930 {
1931         Client *c;
1932         XUnmapEvent *ev = &e->xunmap;
1933
1934         if ((c = wintoclient(ev->window))) {
1935                 if (ev->send_event)
1936                         setclientstate(c, WithdrawnState);
1937                 else
1938                         unmanage(c, 0);
1939         }
1940 }
1941
1942 void
1943 updatebars(void)
1944 {
1945         Monitor *m;
1946         XSetWindowAttributes wa = {
1947                 .override_redirect = True,
1948                 .background_pixel = 0,
1949                 .border_pixel = 0,
1950                 .colormap = cmap,
1951                 .event_mask = ButtonPressMask|ExposureMask
1952         };
1953         XClassHint ch = {"dwm", "dwm"};
1954         for (m = mons; m; m = m->next) {
1955                 if (m->barwin)
1956                         continue;
1957                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, depth,
1958                                           InputOutput, visual,
1959                                           CWOverrideRedirect|CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &wa);
1960                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1961                 XMapRaised(dpy, m->barwin);
1962                 XSetClassHint(dpy, m->barwin, &ch);
1963         }
1964 }
1965
1966 void
1967 updatebarpos(Monitor *m)
1968 {
1969         m->wy = m->my;
1970         m->wh = m->mh;
1971         if (m->showbar) {
1972                 m->wh -= bh;
1973                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1974                 m->wy = m->topbar ? m->wy + bh : m->wy;
1975         } else
1976                 m->by = -bh;
1977 }
1978
1979 void
1980 updateclientlist()
1981 {
1982         Client *c;
1983         Monitor *m;
1984
1985         XDeleteProperty(dpy, root, netatom[NetClientList]);
1986         for (m = mons; m; m = m->next)
1987                 for (c = m->clients; c; c = c->next)
1988                         XChangeProperty(dpy, root, netatom[NetClientList],
1989                                 XA_WINDOW, 32, PropModeAppend,
1990                                 (unsigned char *) &(c->win), 1);
1991 }
1992
1993 int
1994 updategeom(void)
1995 {
1996         int dirty = 0;
1997
1998 #ifdef XINERAMA
1999         if (XineramaIsActive(dpy)) {
2000                 int i, j, n, nn;
2001                 Client *c;
2002                 Monitor *m;
2003                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2004                 XineramaScreenInfo *unique = NULL;
2005
2006                 for (n = 0, m = mons; m; m = m->next, n++);
2007                 /* only consider unique geometries as separate screens */
2008                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
2009                 for (i = 0, j = 0; i < nn; i++)
2010                         if (isuniquegeom(unique, j, &info[i]))
2011                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2012                 XFree(info);
2013                 nn = j;
2014                 if (n <= nn) { /* new monitors available */
2015                         for (i = 0; i < (nn - n); i++) {
2016                                 for (m = mons; m && m->next; m = m->next);
2017                                 if (m)
2018                                         m->next = createmon();
2019                                 else
2020                                         mons = createmon();
2021                         }
2022                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
2023                                 if (i >= n
2024                                 || unique[i].x_org != m->mx || unique[i].y_org != m->my
2025                                 || unique[i].width != m->mw || unique[i].height != m->mh)
2026                                 {
2027                                         dirty = 1;
2028                                         m->num = i;
2029                                         m->mx = m->wx = unique[i].x_org;
2030                                         m->my = m->wy = unique[i].y_org;
2031                                         m->mw = m->ww = unique[i].width;
2032                                         m->mh = m->wh = unique[i].height;
2033                                         updatebarpos(m);
2034                                 }
2035                 } else { /* less monitors available nn < n */
2036                         for (i = nn; i < n; i++) {
2037                                 for (m = mons; m && m->next; m = m->next);
2038                                 while ((c = m->clients)) {
2039                                         dirty = 1;
2040                                         m->clients = c->next;
2041                                         detachstack(c);
2042                                         c->mon = mons;
2043                                         attach(c);
2044                                         attachstack(c);
2045                                 }
2046                                 if (m == selmon)
2047                                         selmon = mons;
2048                                 cleanupmon(m);
2049                         }
2050                 }
2051                 free(unique);
2052         } else
2053 #endif /* XINERAMA */
2054         { /* default monitor setup */
2055                 if (!mons)
2056                         mons = createmon();
2057                 if (mons->mw != sw || mons->mh != sh) {
2058                         dirty = 1;
2059                         mons->mw = mons->ww = sw;
2060                         mons->mh = mons->wh = sh;
2061                         updatebarpos(mons);
2062                 }
2063         }
2064         if (dirty) {
2065                 selmon = mons;
2066                 selmon = wintomon(root);
2067         }
2068         return dirty;
2069 }
2070
2071 void
2072 updatenumlockmask(void)
2073 {
2074         unsigned int i, j;
2075         XModifierKeymap *modmap;
2076
2077         numlockmask = 0;
2078         modmap = XGetModifierMapping(dpy);
2079         for (i = 0; i < 8; i++)
2080                 for (j = 0; j < modmap->max_keypermod; j++)
2081                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
2082                                 == XKeysymToKeycode(dpy, XK_Num_Lock))
2083                                 numlockmask = (1 << i);
2084         XFreeModifiermap(modmap);
2085 }
2086
2087 void
2088 updatesizehints(Client *c)
2089 {
2090         long msize;
2091         XSizeHints size;
2092
2093         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
2094                 /* size is uninitialized, ensure that size.flags aren't used */
2095                 size.flags = PSize;
2096         if (size.flags & PBaseSize) {
2097                 c->basew = size.base_width;
2098                 c->baseh = size.base_height;
2099         } else if (size.flags & PMinSize) {
2100                 c->basew = size.min_width;
2101                 c->baseh = size.min_height;
2102         } else
2103                 c->basew = c->baseh = 0;
2104         if (size.flags & PResizeInc) {
2105                 c->incw = size.width_inc;
2106                 c->inch = size.height_inc;
2107         } else
2108                 c->incw = c->inch = 0;
2109         if (size.flags & PMaxSize) {
2110                 c->maxw = size.max_width;
2111                 c->maxh = size.max_height;
2112         } else
2113                 c->maxw = c->maxh = 0;
2114         if (size.flags & PMinSize) {
2115                 c->minw = size.min_width;
2116                 c->minh = size.min_height;
2117         } else if (size.flags & PBaseSize) {
2118                 c->minw = size.base_width;
2119                 c->minh = size.base_height;
2120         } else
2121                 c->minw = c->minh = 0;
2122         if (size.flags & PAspect) {
2123                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2124                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2125         } else
2126                 c->maxa = c->mina = 0.0;
2127         c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
2128 }
2129
2130 void
2131 updatestatus(void)
2132 {
2133         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2134                 strcpy(stext, "dwm-"VERSION);
2135         drawbar(selmon);
2136 }
2137
2138 void
2139 updatetitle(Client *c)
2140 {
2141         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2142                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2143         if (c->name[0] == '\0') /* hack to mark broken clients */
2144                 strcpy(c->name, broken);
2145 }
2146
2147 void
2148 updatewindowtype(Client *c)
2149 {
2150         Atom state = getatomprop(c, netatom[NetWMState]);
2151         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2152
2153         if (state == netatom[NetWMFullscreen])
2154                 setfullscreen(c, 1);
2155         if (wtype == netatom[NetWMWindowTypeDialog])
2156                 c->isfloating = 1;
2157 }
2158
2159 void
2160 updatewmhints(Client *c)
2161 {
2162         XWMHints *wmh;
2163
2164         if ((wmh = XGetWMHints(dpy, c->win))) {
2165                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2166                         wmh->flags &= ~XUrgencyHint;
2167                         XSetWMHints(dpy, c->win, wmh);
2168                 } else
2169                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2170                 if (wmh->flags & InputHint)
2171                         c->neverfocus = !wmh->input;
2172                 else
2173                         c->neverfocus = 0;
2174                 XFree(wmh);
2175         }
2176 }
2177
2178 void
2179 view(const Arg *arg)
2180 {
2181         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2182                 return;
2183         selmon->seltags ^= 1; /* toggle sel tagset */
2184         if (arg->ui & TAGMASK)
2185                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2186         focus(NULL);
2187         arrange(selmon);
2188 }
2189
2190 pid_t
2191 winpid(Window w)
2192 {
2193
2194         pid_t result = 0;
2195
2196 #ifdef __linux__
2197         xcb_res_client_id_spec_t spec = {0};
2198         spec.client = w;
2199         spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;
2200
2201         xcb_generic_error_t *e = NULL;
2202         xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
2203         xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);
2204
2205         if (!r)
2206                 return (pid_t)0;
2207
2208         xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
2209         for (; i.rem; xcb_res_client_id_value_next(&i)) {
2210                 spec = i.data->spec;
2211                 if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
2212                         uint32_t *t = xcb_res_client_id_value_value(i.data);
2213                         result = *t;
2214                         break;
2215                 }
2216         }
2217
2218         free(r);
2219
2220         if (result == (pid_t)-1)
2221                 result = 0;
2222
2223 #endif /* __linux__ */
2224
2225 #ifdef __OpenBSD__
2226         Atom type;
2227         int format;
2228         unsigned long len, bytes;
2229         unsigned char *prop;
2230         pid_t ret;
2231
2232         if (XGetWindowProperty(dpy, w, XInternAtom(dpy, "_NET_WM_PID", 0), 0, 1, False, AnyPropertyType, &type, &format, &len, &bytes, &prop) != Success || !prop)
2233                return 0;
2234
2235         ret = *(pid_t*)prop;
2236         XFree(prop);
2237         result = ret;
2238
2239 #endif /* __OpenBSD__ */
2240         return result;
2241 }
2242
2243 pid_t
2244 getparentprocess(pid_t p)
2245 {
2246         unsigned int v = 0;
2247
2248 #ifdef __linux__
2249         FILE *f;
2250         char buf[256];
2251         snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);
2252
2253         if (!(f = fopen(buf, "r")))
2254                 return 0;
2255
2256         fscanf(f, "%*u %*s %*c %u", &v);
2257         fclose(f);
2258 #endif /* __linux__*/
2259
2260 #ifdef __OpenBSD__
2261         int n;
2262         kvm_t *kd;
2263         struct kinfo_proc *kp;
2264
2265         kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, NULL);
2266         if (!kd)
2267                 return 0;
2268
2269         kp = kvm_getprocs(kd, KERN_PROC_PID, p, sizeof(*kp), &n);
2270         v = kp->p_ppid;
2271 #endif /* __OpenBSD__ */
2272
2273         return (pid_t)v;
2274 }
2275
2276 int
2277 isdescprocess(pid_t p, pid_t c)
2278 {
2279         while (p != c && c != 0)
2280                 c = getparentprocess(c);
2281
2282         return (int)c;
2283 }
2284
2285 Client *
2286 termforwin(const Client *w)
2287 {
2288         Client *c;
2289         Monitor *m;
2290
2291         if (!w->pid || w->isterminal)
2292                 return NULL;
2293
2294         for (m = mons; m; m = m->next) {
2295                 for (c = m->clients; c; c = c->next) {
2296                         if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
2297                                 return c;
2298                 }
2299         }
2300
2301         return NULL;
2302 }
2303
2304 Client *
2305 swallowingclient(Window w)
2306 {
2307         Client *c;
2308         Monitor *m;
2309
2310         for (m = mons; m; m = m->next) {
2311                 for (c = m->clients; c; c = c->next) {
2312                         if (c->swallowing && c->swallowing->win == w)
2313                                 return c;
2314                 }
2315         }
2316
2317         return NULL;
2318 }
2319
2320 Client *
2321 wintoclient(Window w)
2322 {
2323         Client *c;
2324         Monitor *m;
2325
2326         for (m = mons; m; m = m->next)
2327                 for (c = m->clients; c; c = c->next)
2328                         if (c->win == w)
2329                                 return c;
2330         return NULL;
2331 }
2332
2333 Monitor *
2334 wintomon(Window w)
2335 {
2336         int x, y;
2337         Client *c;
2338         Monitor *m;
2339
2340         if (w == root && getrootptr(&x, &y))
2341                 return recttomon(x, y, 1, 1);
2342         for (m = mons; m; m = m->next)
2343                 if (w == m->barwin)
2344                         return m;
2345         if ((c = wintoclient(w)))
2346                 return c->mon;
2347         return selmon;
2348 }
2349
2350 /* There's no way to check accesses to destroyed windows, thus those cases are
2351  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2352  * default error handler, which may call exit. */
2353 int
2354 xerror(Display *dpy, XErrorEvent *ee)
2355 {
2356         if (ee->error_code == BadWindow
2357         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2358         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2359         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2360         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2361         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2362         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2363         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2364         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2365                 return 0;
2366         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2367                 ee->request_code, ee->error_code);
2368         return xerrorxlib(dpy, ee); /* may call exit */
2369 }
2370
2371 int
2372 xerrordummy(Display *dpy, XErrorEvent *ee)
2373 {
2374         return 0;
2375 }
2376
2377 /* Startup Error handler to check if another window manager
2378  * is already running. */
2379 int
2380 xerrorstart(Display *dpy, XErrorEvent *ee)
2381 {
2382         die("dwm: another window manager is already running");
2383         return -1;
2384 }
2385
2386 void
2387 xinitvisual()
2388 {
2389         XVisualInfo *infos;
2390         XRenderPictFormat *fmt;
2391         int nitems;
2392         int i;
2393
2394         XVisualInfo tpl = {
2395                 .screen = screen,
2396                 .depth = 32,
2397                 .class = TrueColor
2398         };
2399         long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
2400
2401         infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
2402         visual = NULL;
2403         for(i = 0; i < nitems; i ++) {
2404                 fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
2405                 if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
2406                         visual = infos[i].visual;
2407                         depth = infos[i].depth;
2408                         cmap = XCreateColormap(dpy, root, visual, AllocNone);
2409                         useargb = 1;
2410                         break;
2411                 }
2412         }
2413
2414         XFree(infos);
2415
2416         if (! visual) {
2417                 visual = DefaultVisual(dpy, screen);
2418                 depth = DefaultDepth(dpy, screen);
2419                 cmap = DefaultColormap(dpy, screen);
2420         }
2421 }
2422
2423 void
2424 zoom(const Arg *arg)
2425 {
2426         Client *c = selmon->sel;
2427
2428         if (!selmon->lt[selmon->sellt]->arrange
2429         || (selmon->sel && selmon->sel->isfloating))
2430                 return;
2431         if (c == nexttiled(selmon->clients))
2432                 if (!c || !(c = nexttiled(c->next)))
2433                         return;
2434         pop(c);
2435 }
2436
2437 int
2438 main(int argc, char *argv[])
2439 {
2440         if (argc == 2 && !strcmp("-v", argv[1]))
2441                 die("dwm-"VERSION);
2442         else if (argc != 1)
2443                 die("usage: dwm [-v]");
2444         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2445                 fputs("warning: no locale support\n", stderr);
2446         if (!(dpy = XOpenDisplay(NULL)))
2447                 die("dwm: cannot open display");
2448         if (!(xcon = XGetXCBConnection(dpy)))
2449                 die("dwm: cannot get xcb connection\n");
2450         checkotherwm();
2451         setup();
2452 #ifdef __OpenBSD__
2453         if (pledge("stdio rpath proc exec ps", NULL) == -1)
2454                 die("pledge");
2455 #endif /* __OpenBSD__ */
2456         scan();
2457         run();
2458         if(restart) execvp(argv[0], argv);
2459         cleanup();
2460         XCloseDisplay(dpy);
2461         return EXIT_SUCCESS;
2462 }