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 #include <X11/Xresource.h>
  40 #ifdef XINERAMA
  41 #include <X11/extensions/Xinerama.h>
  42 #endif /* XINERAMA */
  43 #include <X11/Xft/Xft.h>
  44 #include <X11/Xlib-xcb.h>
  45 #include <xcb/res.h>
  46 #ifdef __OpenBSD__
  47 #include <sys/sysctl.h>
  48 #include <kvm.h>
  49 #endif /* __OpenBSD */
  50
  51 #include "drw.h"
  52 #include "util.h"
  53
  54 /* macros */
  55 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  56 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  57 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  58                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  59 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  60 #define LENGTH(X)               (sizeof X / sizeof X[0])
  61 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  62 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  63 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  64 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  65 #define TEXTW(X)                (drw_fontset_getwidth(drw, (X)) + lrpad)
  66
  67 #define OPAQUE                  0xffU
  68
  69 /* enums */
  70 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  71 enum { SchemeNorm, SchemeSel }; /* color schemes */
  72 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
  73        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  74        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  75 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  76 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  77        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  78
  79 typedef union {
  80         int i;
  81         unsigned int ui;
  82         float f;
  83         const void *v;
  84 } Arg;
  85
  86 typedef struct {
  87         unsigned int click;
  88         unsigned int mask;
  89         unsigned int button;
  90         void (*func)(const Arg *arg);
  91         const Arg arg;
  92 } Button;
  93
  94 typedef struct Monitor Monitor;
  95 typedef struct Client Client;
  96 struct Client {
  97         char name[256];
  98         float mina, maxa;
  99         int x, y, w, h;
 100         int oldx, oldy, oldw, oldh;
 101         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
 102         int bw, oldbw;
 103         unsigned int tags;
 104         int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, isterminal, noswallow;
 105         pid_t pid;
 106         Client *next;
 107         Client *snext;
 108         Client *swallowing;
 109         Monitor *mon;
 110         Window win;
 111 };
 112
 113 typedef struct {
 114         unsigned int mod;
 115         KeySym keysym;
 116         void (*func)(const Arg *);
 117         const Arg arg;
 118 } Key;
 119
 120 typedef struct {
 121         const char *symbol;
 122         void (*arrange)(Monitor *);
 123 } Layout;
 124
 125 struct Monitor {
 126         char ltsymbol[16];
 127         float mfact;
 128         int nmaster;
 129         int num;
 130         int by;               /* bar geometry */
 131         int mx, my, mw, mh;   /* screen size */
 132         int wx, wy, ww, wh;   /* window area  */
 133         int gappx;            /* gaps between windows */
 134         unsigned int seltags;
 135         unsigned int sellt;
 136         unsigned int tagset[2];
 137         int showbar;
 138         int topbar;
 139         Client *clients;
 140         Client *sel;
 141         Client *stack;
 142         Monitor *next;
 143         Window barwin;
 144         const Layout *lt[2];
 145 };
 146
 147 typedef struct {
 148         const char *class;
 149         const char *instance;
 150         const char *title;
 151         unsigned int tags;
 152         int isfloating;
 153         int isterminal;
 154         int noswallow;
 155         int monitor;
 156 } Rule;
 157
 158 /* Xresources preferences */
 159 enum resource_type {
 160         STRING = 0,
 161         INTEGER = 1,
 162         FLOAT = 2
 163 };
 164
 165 typedef struct {
 166         char *name;
 167         enum resource_type type;
 168         void *dst;
 169 } ResourcePref;
 170
 171 /* function declarations */
 172 static void applyrules(Client *c);
 173 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 174 static void arrange(Monitor *m);
 175 static void arrangemon(Monitor *m);
 176 static void attach(Client *c);
 177 static void attachstack(Client *c);
 178 static void buttonpress(XEvent *e);
 179 static void checkotherwm(void);
 180 static void cleanup(void);
 181 static void cleanupmon(Monitor *mon);
 182 static void clientmessage(XEvent *e);
 183 static void configure(Client *c);
 184 static void configurenotify(XEvent *e);
 185 static void configurerequest(XEvent *e);
 186 static Monitor *createmon(void);
 187 static void destroynotify(XEvent *e);
 188 static void detach(Client *c);
 189 static void detachstack(Client *c);
 190 static Monitor *dirtomon(int dir);
 191 static void drawbar(Monitor *m);
 192 static void drawbars(void);
 193 static void enternotify(XEvent *e);
 194 static void expose(XEvent *e);
 195 static void focus(Client *c);
 196 static void focusin(XEvent *e);
 197 static void focusmon(const Arg *arg);
 198 static void focusstack(const Arg *arg);
 199 static Atom getatomprop(Client *c, Atom prop);
 200 static int getrootptr(int *x, int *y);
 201 static long getstate(Window w);
 202 static int gettextprop(Window w, Atom atom, char *text, unsigned int size);
 203 static void grabbuttons(Client *c, int focused);
 204 static void grabkeys(void);
 205 static void incnmaster(const Arg *arg);
 206 static void keypress(XEvent *e);
 207 static void killclient(const Arg *arg);
 208 static void manage(Window w, XWindowAttributes *wa);
 209 static void mappingnotify(XEvent *e);
 210 static void maprequest(XEvent *e);
 211 static void monocle(Monitor *m);
 212 static void motionnotify(XEvent *e);
 213 static void movemouse(const Arg *arg);
 214 static Client *nexttiled(Client *c);
 215 static void pop(Client *);
 216 static void propertynotify(XEvent *e);
 217 static void quit(const Arg *arg);
 218 static Monitor *recttomon(int x, int y, int w, int h);
 219 static void resize(Client *c, int x, int y, int w, int h, int interact);
 220 static void resizeclient(Client *c, int x, int y, int w, int h);
 221 static void resizemouse(const Arg *arg);
 222 static void restack(Monitor *m);
 223 static void run(void);
 224 static void scan(void);
 225 static int sendevent(Client *c, Atom proto);
 226 static void sendmon(Client *c, Monitor *m);
 227 static void setclientstate(Client *c, long state);
 228 static void setfocus(Client *c);
 229 static void setfullscreen(Client *c, int fullscreen);
 230 static void setgaps(const Arg *arg);
 231 static void setlayout(const Arg *arg);
 232 static void setmfact(const Arg *arg);
 233 static void setup(void);
 234 static void seturgent(Client *c, int urg);
 235 static void showhide(Client *c);
 236 static void sigchld(int unused);
 237 static void sighup(int unused);
 238 static void sigterm(int unused);
 239 static void spawn(const Arg *arg);
 240 static void tag(const Arg *arg);
 241 static void tagmon(const Arg *arg);
 242 static void tile(Monitor *);
 243 static void togglebar(const Arg *arg);
 244 static void togglefloating(const Arg *arg);
 245 static void togglefullscr(const Arg *arg);
 246 static void toggletag(const Arg *arg);
 247 static void toggleview(const Arg *arg);
 248 static void unfocus(Client *c, int setfocus);
 249 static void unmanage(Client *c, int destroyed);
 250 static void unmapnotify(XEvent *e);
 251 static void updatebarpos(Monitor *m);
 252 static void updatebars(void);
 253 static void updateclientlist(void);
 254 static int updategeom(void);
 255 static void updatenumlockmask(void);
 256 static void updatesizehints(Client *c);
 257 static void updatestatus(void);
 258 static void updatetitle(Client *c);
 259 static void updatewindowtype(Client *c);
 260 static void updatewmhints(Client *c);
 261 static void view(const Arg *arg);
 262 static Client *wintoclient(Window w);
 263 static Monitor *wintomon(Window w);
 264 static int xerror(Display *dpy, XErrorEvent *ee);
 265 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 266 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 267 static void xinitvisual();
 268 static void zoom(const Arg *arg);
 269 static void load_xresources(void);
 270 static void resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst);
 271
 272 static pid_t getparentprocess(pid_t p);
 273 static int isdescprocess(pid_t p, pid_t c);
 274 static Client *swallowingclient(Window w);
 275 static Client *termforwin(const Client *c);
 276 static pid_t winpid(Window w);
 277
 278 /* variables */
 279 static const char broken[] = "broken";
 280 static char stext[256];
 281 static int screen;
 282 static int sw, sh;           /* X display screen geometry width, height */
 283 static int bh, blw = 0;      /* bar geometry */
 284 static int lrpad;            /* sum of left and right padding for text */
 285 static int (*xerrorxlib)(Display *, XErrorEvent *);
 286 static unsigned int numlockmask = 0;
 287 static void (*handler[LASTEvent]) (XEvent *) = {
 288         [ButtonPress] = buttonpress,
 289         [ClientMessage] = clientmessage,
 290         [ConfigureRequest] = configurerequest,
 291         [ConfigureNotify] = configurenotify,
 292         [DestroyNotify] = destroynotify,
 293         [EnterNotify] = enternotify,
 294         [Expose] = expose,
 295         [FocusIn] = focusin,
 296         [KeyPress] = keypress,
 297         [MappingNotify] = mappingnotify,
 298         [MapRequest] = maprequest,
 299         [MotionNotify] = motionnotify,
 300         [PropertyNotify] = propertynotify,
 301         [UnmapNotify] = unmapnotify
 302 };
 303 static Atom wmatom[WMLast], netatom[NetLast];
 304 static int restart = 0;
 305 static int running = 1;
 306 static Cur *cursor[CurLast];
 307 static Clr **scheme;
 308 static Display *dpy;
 309 static Drw *drw;
 310 static Monitor *mons, *selmon;
 311 static Window root, wmcheckwin;
 312
 313 static xcb_connection_t *xcon;
 314
 315 static int useargb = 0;
 316 static Visual *visual;
 317 static int depth;
 318 static Colormap cmap;
 319
 320 /* configuration, allows nested code to access above variables */
 321 #include "config.h"
 322
 323 /* compile-time check if all tags fit into an unsigned int bit array. */
 324 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 325
 326 /* function implementations */
 327 void
 328 applyrules(Client *c)
 329 {
 330         const char *class, *instance;
 331         unsigned int i;
 332         const Rule *r;
 333         Monitor *m;
 334         XClassHint ch = { NULL, NULL };
 335
 336         /* rule matching */
 337         c->isfloating = 0;
 338         c->tags = 0;
 339         XGetClassHint(dpy, c->win, &ch);
 340         class    = ch.res_class ? ch.res_class : broken;
 341         instance = ch.res_name  ? ch.res_name  : broken;
 342
 343         for (i = 0; i < LENGTH(rules); i++) {
 344                 r = &rules[i];
 345                 if ((!r->title || strstr(c->name, r->title))
 346                 && (!r->class || strstr(class, r->class))
 347                 && (!r->instance || strstr(instance, r->instance)))
 348                 {
 349                         c->isterminal = r->isterminal;
 350                         c->noswallow  = r->noswallow;
 351                         c->isfloating = r->isfloating;
 352                         c->tags |= r->tags;
 353                         for (m = mons; m && m->num != r->monitor; m = m->next);
 354                         if (m)
 355                                 c->mon = m;
 356                 }
 357         }
 358         if (ch.res_class)
 359                 XFree(ch.res_class);
 360         if (ch.res_name)
 361                 XFree(ch.res_name);
 362         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 363 }
 364
 365 int
 366 applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact)
 367 {
 368         int baseismin;
 369         Monitor *m = c->mon;
 370
 371         /* set minimum possible */
 372         *w = MAX(1, *w);
 373         *h = MAX(1, *h);
 374         if (interact) {
 375                 if (*x > sw)
 376                         *x = sw - WIDTH(c);
 377                 if (*y > sh)
 378                         *y = sh - HEIGHT(c);
 379                 if (*x + *w + 2 * c->bw < 0)
 380                         *x = 0;
 381                 if (*y + *h + 2 * c->bw < 0)
 382                         *y = 0;
 383         } else {
 384                 if (*x >= m->wx + m->ww)
 385                         *x = m->wx + m->ww - WIDTH(c);
 386                 if (*y >= m->wy + m->wh)
 387                         *y = m->wy + m->wh - HEIGHT(c);
 388                 if (*x + *w + 2 * c->bw <= m->wx)
 389                         *x = m->wx;
 390                 if (*y + *h + 2 * c->bw <= m->wy)
 391                         *y = m->wy;
 392         }
 393         if (*h < bh)
 394                 *h = bh;
 395         if (*w < bh)
 396                 *w = bh;
 397         if (resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 398                 /* see last two sentences in ICCCM 4.1.2.3 */
 399                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 400                 if (!baseismin) { /* temporarily remove base dimensions */
 401                         *w -= c->basew;
 402                         *h -= c->baseh;
 403                 }
 404                 /* adjust for aspect limits */
 405                 if (c->mina > 0 && c->maxa > 0) {
 406                         if (c->maxa < (float)*w / *h)
 407                                 *w = *h * c->maxa + 0.5;
 408                         else if (c->mina < (float)*h / *w)
 409                                 *h = *w * c->mina + 0.5;
 410                 }
 411                 if (baseismin) { /* increment calculation requires this */
 412                         *w -= c->basew;
 413                         *h -= c->baseh;
 414                 }
 415                 /* adjust for increment value */
 416                 if (c->incw)
 417                         *w -= *w % c->incw;
 418                 if (c->inch)
 419                         *h -= *h % c->inch;
 420                 /* restore base dimensions */
 421                 *w = MAX(*w + c->basew, c->minw);
 422                 *h = MAX(*h + c->baseh, c->minh);
 423                 if (c->maxw)
 424                         *w = MIN(*w, c->maxw);
 425                 if (c->maxh)
 426                         *h = MIN(*h, c->maxh);
 427         }
 428         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 429 }
 430
 431 void
 432 arrange(Monitor *m)
 433 {
 434         if (m)
 435                 showhide(m->stack);
 436         else for (m = mons; m; m = m->next)
 437                 showhide(m->stack);
 438         if (m) {
 439                 arrangemon(m);
 440                 restack(m);
 441         } else for (m = mons; m; m = m->next)
 442                 arrangemon(m);
 443 }
 444
 445 void
 446 arrangemon(Monitor *m)
 447 {
 448         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 449         if (m->lt[m->sellt]->arrange)
 450                 m->lt[m->sellt]->arrange(m);
 451 }
 452
 453 void
 454 attach(Client *c)
 455 {
 456         c->next = c->mon->clients;
 457         c->mon->clients = c;
 458 }
 459
 460 void
 461 attachstack(Client *c)
 462 {
 463         c->snext = c->mon->stack;
 464         c->mon->stack = c;
 465 }
 466
 467 void
 468 swallow(Client *p, Client *c)
 469 {
 470
 471         if (c->noswallow || c->isterminal)
 472                 return;
 473         if (c->noswallow && !swallowfloating && c->isfloating)
 474                 return;
 475
 476         detach(c);
 477         detachstack(c);
 478
 479         setclientstate(c, WithdrawnState);
 480         XUnmapWindow(dpy, p->win);
 481
 482         p->swallowing = c;
 483         c->mon = p->mon;
 484
 485         Window w = p->win;
 486         p->win = c->win;
 487         c->win = w;
 488         updatetitle(p);
 489         XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
 490         arrange(p->mon);
 491         configure(p);
 492         updateclientlist();
 493 }
 494
 495 void
 496 unswallow(Client *c)
 497 {
 498         c->win = c->swallowing->win;
 499
 500         free(c->swallowing);
 501         c->swallowing = NULL;
 502
 503         /* unfullscreen the client */
 504         setfullscreen(c, 0);
 505         updatetitle(c);
 506         arrange(c->mon);
 507         XMapWindow(dpy, c->win);
 508         XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 509         setclientstate(c, NormalState);
 510         focus(NULL);
 511         arrange(c->mon);
 512 }
 513
 514 void
 515 buttonpress(XEvent *e)
 516 {
 517         unsigned int i, x, click;
 518         Arg arg = {0};
 519         Client *c;
 520         Monitor *m;
 521         XButtonPressedEvent *ev = &e->xbutton;
 522
 523         click = ClkRootWin;
 524         /* focus monitor if necessary */
 525         if ((m = wintomon(ev->window)) && m != selmon) {
 526                 unfocus(selmon->sel, 1);
 527                 selmon = m;
 528                 focus(NULL);
 529         }
 530         if (ev->window == selmon->barwin) {
 531                 i = x = 0;
 532                 do
 533                         x += TEXTW(tags[i]);
 534                 while (ev->x >= x && ++i < LENGTH(tags));
 535                 if (i < LENGTH(tags)) {
 536                         click = ClkTagBar;
 537                         arg.ui = 1 << i;
 538                 } else if (ev->x < x + blw)
 539                         click = ClkLtSymbol;
 540                 else if (ev->x > selmon->ww - (int)TEXTW(stext))
 541                         click = ClkStatusText;
 542                 else
 543                         click = ClkWinTitle;
 544         } else if ((c = wintoclient(ev->window))) {
 545                 focus(c);
 546                 restack(selmon);
 547                 XAllowEvents(dpy, ReplayPointer, CurrentTime);
 548                 click = ClkClientWin;
 549         }
 550         for (i = 0; i < LENGTH(buttons); i++)
 551                 if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 552                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 553                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 554 }
 555
 556 void
 557 checkotherwm(void)
 558 {
 559         xerrorxlib = XSetErrorHandler(xerrorstart);
 560         /* this causes an error if some other window manager is running */
 561         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 562         XSync(dpy, False);
 563         XSetErrorHandler(xerror);
 564         XSync(dpy, False);
 565 }
 566
 567 void
 568 cleanup(void)
 569 {
 570         Arg a = {.ui = ~0};
 571         Layout foo = { "", NULL };
 572         Monitor *m;
 573         size_t i;
 574
 575         view(&a);
 576         selmon->lt[selmon->sellt] = &foo;
 577         for (m = mons; m; m = m->next)
 578                 while (m->stack)
 579                         unmanage(m->stack, 0);
 580         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 581         while (mons)
 582                 cleanupmon(mons);
 583         for (i = 0; i < CurLast; i++)
 584                 drw_cur_free(drw, cursor[i]);
 585         for (i = 0; i < LENGTH(colors); i++)
 586                 free(scheme[i]);
 587         free(scheme);
 588         XDestroyWindow(dpy, wmcheckwin);
 589         drw_free(drw);
 590         XSync(dpy, False);
 591         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 592         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 593 }
 594
 595 void
 596 cleanupmon(Monitor *mon)
 597 {
 598         Monitor *m;
 599
 600         if (mon == mons)
 601                 mons = mons->next;
 602         else {
 603                 for (m = mons; m && m->next != mon; m = m->next);
 604                 m->next = mon->next;
 605         }
 606         XUnmapWindow(dpy, mon->barwin);
 607         XDestroyWindow(dpy, mon->barwin);
 608         free(mon);
 609 }
 610
 611 void
 612 clientmessage(XEvent *e)
 613 {
 614         XClientMessageEvent *cme = &e->xclient;
 615         Client *c = wintoclient(cme->window);
 616
 617         if (!c)
 618                 return;
 619         if (cme->message_type == netatom[NetWMState]) {
 620                 if (cme->data.l[1] == netatom[NetWMFullscreen]
 621                 || cme->data.l[2] == netatom[NetWMFullscreen])
 622                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 623                                 || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 624         } else if (cme->message_type == netatom[NetActiveWindow]) {
 625                 if (c != selmon->sel && !c->isurgent)
 626                         seturgent(c, 1);
 627         }
 628 }
 629
 630 void
 631 configure(Client *c)
 632 {
 633         XConfigureEvent ce;
 634
 635         ce.type = ConfigureNotify;
 636         ce.display = dpy;
 637         ce.event = c->win;
 638         ce.window = c->win;
 639         ce.x = c->x;
 640         ce.y = c->y;
 641         ce.width = c->w;
 642         ce.height = c->h;
 643         ce.border_width = c->bw;
 644         ce.above = None;
 645         ce.override_redirect = False;
 646         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 647 }
 648
 649 void
 650 configurenotify(XEvent *e)
 651 {
 652         Monitor *m;
 653         Client *c;
 654         XConfigureEvent *ev = &e->xconfigure;
 655         int dirty;
 656
 657         /* TODO: updategeom handling sucks, needs to be simplified */
 658         if (ev->window == root) {
 659                 dirty = (sw != ev->width || sh != ev->height);
 660                 sw = ev->width;
 661                 sh = ev->height;
 662                 if (updategeom() || dirty) {
 663                         drw_resize(drw, sw, bh);
 664                         updatebars();
 665                         for (m = mons; m; m = m->next) {
 666                                 for (c = m->clients; c; c = c->next)
 667                                         if (c->isfullscreen)
 668                                                 resizeclient(c, m->mx, m->my, m->mw, m->mh);
 669                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 670                         }
 671                         focus(NULL);
 672                         arrange(NULL);
 673                 }
 674         }
 675 }
 676
 677 void
 678 configurerequest(XEvent *e)
 679 {
 680         Client *c;
 681         Monitor *m;
 682         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 683         XWindowChanges wc;
 684
 685         if ((c = wintoclient(ev->window))) {
 686                 if (ev->value_mask & CWBorderWidth)
 687                         c->bw = ev->border_width;
 688                 else if (c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 689                         m = c->mon;
 690                         if (ev->value_mask & CWX) {
 691                                 c->oldx = c->x;
 692                                 c->x = m->mx + ev->x;
 693                         }
 694                         if (ev->value_mask & CWY) {
 695                                 c->oldy = c->y;
 696                                 c->y = m->my + ev->y;
 697                         }
 698                         if (ev->value_mask & CWWidth) {
 699                                 c->oldw = c->w;
 700                                 c->w = ev->width;
 701                         }
 702                         if (ev->value_mask & CWHeight) {
 703                                 c->oldh = c->h;
 704                                 c->h = ev->height;
 705                         }
 706                         if ((c->x + c->w) > m->mx + m->mw && c->isfloating)
 707                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 708                         if ((c->y + c->h) > m->my + m->mh && c->isfloating)
 709                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 710                         if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 711                                 configure(c);
 712                         if (ISVISIBLE(c))
 713                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 714                 } else
 715                         configure(c);
 716         } else {
 717                 wc.x = ev->x;
 718                 wc.y = ev->y;
 719                 wc.width = ev->width;
 720                 wc.height = ev->height;
 721                 wc.border_width = ev->border_width;
 722                 wc.sibling = ev->above;
 723                 wc.stack_mode = ev->detail;
 724                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 725         }
 726         XSync(dpy, False);
 727 }
 728
 729 Monitor *
 730 createmon(void)
 731 {
 732         Monitor *m;
 733
 734         m = ecalloc(1, sizeof(Monitor));
 735         m->tagset[0] = m->tagset[1] = 1;
 736         m->mfact = mfact;
 737         m->nmaster = nmaster;
 738         m->showbar = showbar;
 739         m->topbar = topbar;
 740         m->gappx = gappx;
 741         m->lt[0] = &layouts[0];
 742         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 743         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 744         return m;
 745 }
 746
 747 void
 748 destroynotify(XEvent *e)
 749 {
 750         Client *c;
 751         XDestroyWindowEvent *ev = &e->xdestroywindow;
 752
 753         if ((c = wintoclient(ev->window)))
 754                 unmanage(c, 1);
 755
 756         else if ((c = swallowingclient(ev->window)))
 757                 unmanage(c->swallowing, 1);
 758 }
 759
 760 void
 761 detach(Client *c)
 762 {
 763         Client **tc;
 764
 765         for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 766         *tc = c->next;
 767 }
 768
 769 void
 770 detachstack(Client *c)
 771 {
 772         Client **tc, *t;
 773
 774         for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 775         *tc = c->snext;
 776
 777         if (c == c->mon->sel) {
 778                 for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 779                 c->mon->sel = t;
 780         }
 781 }
 782
 783 Monitor *
 784 dirtomon(int dir)
 785 {
 786         Monitor *m = NULL;
 787
 788         if (dir > 0) {
 789                 if (!(m = selmon->next))
 790                         m = mons;
 791         } else if (selmon == mons)
 792                 for (m = mons; m->next; m = m->next);
 793         else
 794                 for (m = mons; m->next != selmon; m = m->next);
 795         return m;
 796 }
 797
 798 void
 799 drawbar(Monitor *m)
 800 {
 801         int x, w, tw = 0;
 802         int boxs = drw->fonts->h / 9;
 803         int boxw = drw->fonts->h / 6 + 2;
 804         unsigned int i, occ = 0, urg = 0;
 805         Client *c;
 806
 807         if (!m->showbar)
 808                 return;
 809
 810         /* draw status first so it can be overdrawn by tags later */
 811         if (m == selmon) { /* status is only drawn on selected monitor */
 812                 drw_setscheme(drw, scheme[SchemeNorm]);
 813                 tw = TEXTW(stext) - lrpad + 2; /* 2px right padding */
 814                 drw_text(drw, m->ww - tw, 0, tw, bh, 0, stext, 0);
 815         }
 816
 817         for (c = m->clients; c; c = c->next) {
 818                 occ |= c->tags;
 819                 if (c->isurgent)
 820                         urg |= c->tags;
 821         }
 822         x = 0;
 823         for (i = 0; i < LENGTH(tags); i++) {
 824                 w = TEXTW(tags[i]);
 825                 drw_setscheme(drw, scheme[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
 826                 drw_text(drw, x, 0, w, bh, lrpad / 2, tags[i], urg & 1 << i);
 827                 if (occ & 1 << i)
 828                         drw_rect(drw, x + boxs, boxs, boxw, boxw,
 829                                 m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 830                                 urg & 1 << i);
 831                 x += w;
 832         }
 833         w = blw = TEXTW(m->ltsymbol);
 834         drw_setscheme(drw, scheme[SchemeNorm]);
 835         x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 836
 837         if ((w = m->ww - tw - x) > bh) {
 838                 if (m->sel) {
 839                         drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);
 840                         drw_text(drw, x, 0, w, bh, lrpad / 2, m->sel->name, 0);
 841                         if (m->sel->isfloating)
 842                                 drw_rect(drw, x + boxs, boxs, boxw, boxw, m->sel->isfixed, 0);
 843                 } else {
 844                         drw_setscheme(drw, scheme[SchemeNorm]);
 845                         drw_rect(drw, x, 0, w, bh, 1, 1);
 846                 }
 847         }
 848         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 849 }
 850
 851 void
 852 drawbars(void)
 853 {
 854         Monitor *m;
 855
 856         for (m = mons; m; m = m->next)
 857                 drawbar(m);
 858 }
 859
 860 void
 861 enternotify(XEvent *e)
 862 {
 863         Client *c;
 864         Monitor *m;
 865         XCrossingEvent *ev = &e->xcrossing;
 866
 867         if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 868                 return;
 869         c = wintoclient(ev->window);
 870         m = c ? c->mon : wintomon(ev->window);
 871         if (m != selmon) {
 872                 unfocus(selmon->sel, 1);
 873                 selmon = m;
 874         } else if (!c || c == selmon->sel)
 875                 return;
 876         focus(c);
 877 }
 878
 879 void
 880 expose(XEvent *e)
 881 {
 882         Monitor *m;
 883         XExposeEvent *ev = &e->xexpose;
 884
 885         if (ev->count == 0 && (m = wintomon(ev->window)))
 886                 drawbar(m);
 887 }
 888
 889 void
 890 focus(Client *c)
 891 {
 892         if (!c || !ISVISIBLE(c))
 893                 for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 894         if (selmon->sel && selmon->sel != c)
 895                 unfocus(selmon->sel, 0);
 896         if (c) {
 897                 if (c->mon != selmon)
 898                         selmon = c->mon;
 899                 if (c->isurgent)
 900                         seturgent(c, 0);
 901                 detachstack(c);
 902                 attachstack(c);
 903                 grabbuttons(c, 1);
 904                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 905                 setfocus(c);
 906         } else {
 907                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 908                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 909         }
 910         selmon->sel = c;
 911         drawbars();
 912 }
 913
 914 /* there are some broken focus acquiring clients needing extra handling */
 915 void
 916 focusin(XEvent *e)
 917 {
 918         XFocusChangeEvent *ev = &e->xfocus;
 919
 920         if (selmon->sel && ev->window != selmon->sel->win)
 921                 setfocus(selmon->sel);
 922 }
 923
 924 void
 925 focusmon(const Arg *arg)
 926 {
 927         Monitor *m;
 928
 929         if (!mons->next)
 930                 return;
 931         if ((m = dirtomon(arg->i)) == selmon)
 932                 return;
 933         unfocus(selmon->sel, 0);
 934         selmon = m;
 935         focus(NULL);
 936 }
 937
 938 void
 939 focusstack(const Arg *arg)
 940 {
 941         Client *c = NULL, *i;
 942
 943         if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
 944                 return;
 945         if (arg->i > 0) {
 946                 for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 947                 if (!c)
 948                         for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 949         } else {
 950                 for (i = selmon->clients; i != selmon->sel; i = i->next)
 951                         if (ISVISIBLE(i))
 952                                 c = i;
 953                 if (!c)
 954                         for (; i; i = i->next)
 955                                 if (ISVISIBLE(i))
 956                                         c = i;
 957         }
 958         if (c) {
 959                 focus(c);
 960                 restack(selmon);
 961         }
 962 }
 963
 964 Atom
 965 getatomprop(Client *c, Atom prop)
 966 {
 967         int di;
 968         unsigned long dl;
 969         unsigned char *p = NULL;
 970         Atom da, atom = None;
 971
 972         if (XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 973                 &da, &di, &dl, &dl, &p) == Success && p) {
 974                 atom = *(Atom *)p;
 975                 XFree(p);
 976         }
 977         return atom;
 978 }
 979
 980 int
 981 getrootptr(int *x, int *y)
 982 {
 983         int di;
 984         unsigned int dui;
 985         Window dummy;
 986
 987         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 988 }
 989
 990 long
 991 getstate(Window w)
 992 {
 993         int format;
 994         long result = -1;
 995         unsigned char *p = NULL;
 996         unsigned long n, extra;
 997         Atom real;
 998
 999         if (XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
1000                 &real, &format, &n, &extra, (unsigned char **)&p) != Success)
1001                 return -1;
1002         if (n != 0)
1003                 result = *p;
1004         XFree(p);
1005         return result;
1006 }
1007
1008 int
1009 gettextprop(Window w, Atom atom, char *text, unsigned int size)
1010 {
1011         char **list = NULL;
1012         int n;
1013         XTextProperty name;
1014
1015         if (!text || size == 0)
1016                 return 0;
1017         text[0] = '\0';
1018         if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
1019                 return 0;
1020         if (name.encoding == XA_STRING)
1021                 strncpy(text, (char *)name.value, size - 1);
1022         else {
1023                 if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1024                         strncpy(text, *list, size - 1);
1025                         XFreeStringList(list);
1026                 }
1027         }
1028         text[size - 1] = '\0';
1029         XFree(name.value);
1030         return 1;
1031 }
1032
1033 void
1034 grabbuttons(Client *c, int focused)
1035 {
1036         updatenumlockmask();
1037         {
1038                 unsigned int i, j;
1039                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1040                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1041                 if (!focused)
1042                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1043                                 BUTTONMASK, GrabModeSync, GrabModeSync, None, None);
1044                 for (i = 0; i < LENGTH(buttons); i++)
1045                         if (buttons[i].click == ClkClientWin)
1046                                 for (j = 0; j < LENGTH(modifiers); j++)
1047                                         XGrabButton(dpy, buttons[i].button,
1048                                                 buttons[i].mask | modifiers[j],
1049                                                 c->win, False, BUTTONMASK,
1050                                                 GrabModeAsync, GrabModeSync, None, None);
1051         }
1052 }
1053
1054 void
1055 grabkeys(void)
1056 {
1057         updatenumlockmask();
1058         {
1059                 unsigned int i, j;
1060                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1061                 KeyCode code;
1062
1063                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1064                 for (i = 0; i < LENGTH(keys); i++)
1065                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1066                                 for (j = 0; j < LENGTH(modifiers); j++)
1067                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1068                                                 True, GrabModeAsync, GrabModeAsync);
1069         }
1070 }
1071
1072 void
1073 incnmaster(const Arg *arg)
1074 {
1075         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1076         arrange(selmon);
1077 }
1078
1079 #ifdef XINERAMA
1080 static int
1081 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info)
1082 {
1083         while (n--)
1084                 if (unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1085                 && unique[n].width == info->width && unique[n].height == info->height)
1086                         return 0;
1087         return 1;
1088 }
1089 #endif /* XINERAMA */
1090
1091 void
1092 keypress(XEvent *e)
1093 {
1094         unsigned int i;
1095         KeySym keysym;
1096         XKeyEvent *ev;
1097
1098         ev = &e->xkey;
1099         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1100         for (i = 0; i < LENGTH(keys); i++)
1101                 if (keysym == keys[i].keysym
1102                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1103                 && keys[i].func)
1104                         keys[i].func(&(keys[i].arg));
1105 }
1106
1107 void
1108 killclient(const Arg *arg)
1109 {
1110         if (!selmon->sel)
1111                 return;
1112         if (!sendevent(selmon->sel, wmatom[WMDelete])) {
1113                 XGrabServer(dpy);
1114                 XSetErrorHandler(xerrordummy);
1115                 XSetCloseDownMode(dpy, DestroyAll);
1116                 XKillClient(dpy, selmon->sel->win);
1117                 XSync(dpy, False);
1118                 XSetErrorHandler(xerror);
1119                 XUngrabServer(dpy);
1120         }
1121 }
1122
1123 void
1124 manage(Window w, XWindowAttributes *wa)
1125 {
1126         Client *c, *t = NULL, *term = NULL;
1127         Window trans = None;
1128         XWindowChanges wc;
1129
1130         c = ecalloc(1, sizeof(Client));
1131         c->win = w;
1132         c->pid = winpid(w);
1133         /* geometry */
1134         c->x = c->oldx = wa->x;
1135         c->y = c->oldy = wa->y;
1136         c->w = c->oldw = wa->width;
1137         c->h = c->oldh = wa->height;
1138         c->oldbw = wa->border_width;
1139
1140         updatetitle(c);
1141         if (XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1142                 c->mon = t->mon;
1143                 c->tags = t->tags;
1144         } else {
1145                 c->mon = selmon;
1146                 applyrules(c);
1147                 term = termforwin(c);
1148         }
1149
1150         if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1151                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1152         if (c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1153                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1154         c->x = MAX(c->x, c->mon->mx);
1155         /* only fix client y-offset, if the client center might cover the bar */
1156         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1157                 && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1158         c->bw = borderpx;
1159
1160         wc.border_width = c->bw;
1161         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1162         XSetWindowBorder(dpy, w, scheme[SchemeNorm][ColBorder].pixel);
1163         configure(c); /* propagates border_width, if size doesn't change */
1164         updatewindowtype(c);
1165         updatesizehints(c);
1166         updatewmhints(c);
1167         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1168         grabbuttons(c, 0);
1169         if (!c->isfloating)
1170                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1171         if (c->isfloating)
1172                 XRaiseWindow(dpy, c->win);
1173         attach(c);
1174         attachstack(c);
1175         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1176                 (unsigned char *) &(c->win), 1);
1177         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1178         setclientstate(c, NormalState);
1179         if (c->mon == selmon)
1180                 unfocus(selmon->sel, 0);
1181         c->mon->sel = c;
1182         arrange(c->mon);
1183         XMapWindow(dpy, c->win);
1184         if (term)
1185                 swallow(term, c);
1186         focus(NULL);
1187 }
1188
1189 void
1190 mappingnotify(XEvent *e)
1191 {
1192         XMappingEvent *ev = &e->xmapping;
1193
1194         XRefreshKeyboardMapping(ev);
1195         if (ev->request == MappingKeyboard)
1196                 grabkeys();
1197 }
1198
1199 void
1200 maprequest(XEvent *e)
1201 {
1202         static XWindowAttributes wa;
1203         XMapRequestEvent *ev = &e->xmaprequest;
1204
1205         if (!XGetWindowAttributes(dpy, ev->window, &wa))
1206                 return;
1207         if (wa.override_redirect)
1208                 return;
1209         if (!wintoclient(ev->window))
1210                 manage(ev->window, &wa);
1211 }
1212
1213 void
1214 monocle(Monitor *m)
1215 {
1216         unsigned int n = 0;
1217         Client *c;
1218
1219         for (c = m->clients; c; c = c->next)
1220                 if (ISVISIBLE(c))
1221                         n++;
1222         if (n > 0) /* override layout symbol */
1223                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1224         for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
1225                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
1226 }
1227
1228 void
1229 motionnotify(XEvent *e)
1230 {
1231         static Monitor *mon = NULL;
1232         Monitor *m;
1233         XMotionEvent *ev = &e->xmotion;
1234
1235         if (ev->window != root)
1236                 return;
1237         if ((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1238                 unfocus(selmon->sel, 1);
1239                 selmon = m;
1240                 focus(NULL);
1241         }
1242         mon = m;
1243 }
1244
1245 void
1246 movemouse(const Arg *arg)
1247 {
1248         int x, y, ocx, ocy, nx, ny;
1249         Client *c;
1250         Monitor *m;
1251         XEvent ev;
1252         Time lasttime = 0;
1253
1254         if (!(c = selmon->sel))
1255                 return;
1256         if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
1257                 return;
1258         restack(selmon);
1259         ocx = c->x;
1260         ocy = c->y;
1261         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1262                 None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1263                 return;
1264         if (!getrootptr(&x, &y))
1265                 return;
1266         do {
1267                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1268                 switch(ev.type) {
1269                 case ConfigureRequest:
1270                 case Expose:
1271                 case MapRequest:
1272                         handler[ev.type](&ev);
1273                         break;
1274                 case MotionNotify:
1275                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1276                                 continue;
1277                         lasttime = ev.xmotion.time;
1278
1279                         nx = ocx + (ev.xmotion.x - x);
1280                         ny = ocy + (ev.xmotion.y - y);
1281                         if (abs(selmon->wx - nx) < snap)
1282                                 nx = selmon->wx;
1283                         else if (abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1284                                 nx = selmon->wx + selmon->ww - WIDTH(c);
1285                         if (abs(selmon->wy - ny) < snap)
1286                                 ny = selmon->wy;
1287                         else if (abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1288                                 ny = selmon->wy + selmon->wh - HEIGHT(c);
1289                         if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1290                         && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1291                                 togglefloating(NULL);
1292                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1293                                 resize(c, nx, ny, c->w, c->h, 1);
1294                         break;
1295                 }
1296         } while (ev.type != ButtonRelease);
1297         XUngrabPointer(dpy, CurrentTime);
1298         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1299                 sendmon(c, m);
1300                 selmon = m;
1301                 focus(NULL);
1302         }
1303 }
1304
1305 Client *
1306 nexttiled(Client *c)
1307 {
1308         for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1309         return c;
1310 }
1311
1312 void
1313 pop(Client *c)
1314 {
1315         detach(c);
1316         attach(c);
1317         focus(c);
1318         arrange(c->mon);
1319 }
1320
1321 void
1322 propertynotify(XEvent *e)
1323 {
1324         Client *c;
1325         Window trans;
1326         XPropertyEvent *ev = &e->xproperty;
1327
1328         if ((ev->window == root) && (ev->atom == XA_WM_NAME))
1329                 updatestatus();
1330         else if (ev->state == PropertyDelete)
1331                 return; /* ignore */
1332         else if ((c = wintoclient(ev->window))) {
1333                 switch(ev->atom) {
1334                 default: break;
1335                 case XA_WM_TRANSIENT_FOR:
1336                         if (!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1337                                 (c->isfloating = (wintoclient(trans)) != NULL))
1338                                 arrange(c->mon);
1339                         break;
1340                 case XA_WM_NORMAL_HINTS:
1341                         updatesizehints(c);
1342                         break;
1343                 case XA_WM_HINTS:
1344                         updatewmhints(c);
1345                         drawbars();
1346                         break;
1347                 }
1348                 if (ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1349                         updatetitle(c);
1350                         if (c == c->mon->sel)
1351                                 drawbar(c->mon);
1352                 }
1353                 if (ev->atom == netatom[NetWMWindowType])
1354                         updatewindowtype(c);
1355         }
1356 }
1357
1358 void
1359 quit(const Arg *arg)
1360 {
1361         if(arg->i) restart = 1;
1362         running = 0;
1363 }
1364
1365 Monitor *
1366 recttomon(int x, int y, int w, int h)
1367 {
1368         Monitor *m, *r = selmon;
1369         int a, area = 0;
1370
1371         for (m = mons; m; m = m->next)
1372                 if ((a = INTERSECT(x, y, w, h, m)) > area) {
1373                         area = a;
1374                         r = m;
1375                 }
1376         return r;
1377 }
1378
1379 void
1380 resize(Client *c, int x, int y, int w, int h, int interact)
1381 {
1382         if (applysizehints(c, &x, &y, &w, &h, interact))
1383                 resizeclient(c, x, y, w, h);
1384 }
1385
1386 void
1387 resizeclient(Client *c, int x, int y, int w, int h)
1388 {
1389         XWindowChanges wc;
1390
1391         c->oldx = c->x; c->x = wc.x = x;
1392         c->oldy = c->y; c->y = wc.y = y;
1393         c->oldw = c->w; c->w = wc.width = w;
1394         c->oldh = c->h; c->h = wc.height = h;
1395         wc.border_width = c->bw;
1396         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1397         configure(c);
1398         XSync(dpy, False);
1399 }
1400
1401 void
1402 resizemouse(const Arg *arg)
1403 {
1404         int ocx, ocy, nw, nh;
1405         Client *c;
1406         Monitor *m;
1407         XEvent ev;
1408         Time lasttime = 0;
1409
1410         if (!(c = selmon->sel))
1411                 return;
1412         if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1413                 return;
1414         restack(selmon);
1415         ocx = c->x;
1416         ocy = c->y;
1417         if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1418                 None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1419                 return;
1420         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1421         do {
1422                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1423                 switch(ev.type) {
1424                 case ConfigureRequest:
1425                 case Expose:
1426                 case MapRequest:
1427                         handler[ev.type](&ev);
1428                         break;
1429                 case MotionNotify:
1430                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1431                                 continue;
1432                         lasttime = ev.xmotion.time;
1433
1434                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1435                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1436                         if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1437                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1438                         {
1439                                 if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
1440                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1441                                         togglefloating(NULL);
1442                         }
1443                         if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1444                                 resize(c, c->x, c->y, nw, nh, 1);
1445                         break;
1446                 }
1447         } while (ev.type != ButtonRelease);
1448         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1449         XUngrabPointer(dpy, CurrentTime);
1450         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1451         if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1452                 sendmon(c, m);
1453                 selmon = m;
1454                 focus(NULL);
1455         }
1456 }
1457
1458 void
1459 restack(Monitor *m)
1460 {
1461         Client *c;
1462         XEvent ev;
1463         XWindowChanges wc;
1464
1465         drawbar(m);
1466         if (!m->sel)
1467                 return;
1468         if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
1469                 XRaiseWindow(dpy, m->sel->win);
1470         if (m->lt[m->sellt]->arrange) {
1471                 wc.stack_mode = Below;
1472                 wc.sibling = m->barwin;
1473                 for (c = m->stack; c; c = c->snext)
1474                         if (!c->isfloating && ISVISIBLE(c)) {
1475                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1476                                 wc.sibling = c->win;
1477                         }
1478         }
1479         XSync(dpy, False);
1480         while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1481 }
1482
1483 void
1484 run(void)
1485 {
1486         XEvent ev;
1487         /* main event loop */
1488         XSync(dpy, False);
1489         while (running && !XNextEvent(dpy, &ev))
1490                 if (handler[ev.type])
1491                         handler[ev.type](&ev); /* call handler */
1492 }
1493
1494 void
1495 scan(void)
1496 {
1497         unsigned int i, num;
1498         Window d1, d2, *wins = NULL;
1499         XWindowAttributes wa;
1500
1501         if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1502                 for (i = 0; i < num; i++) {
1503                         if (!XGetWindowAttributes(dpy, wins[i], &wa)
1504                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1505                                 continue;
1506                         if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1507                                 manage(wins[i], &wa);
1508                 }
1509                 for (i = 0; i < num; i++) { /* now the transients */
1510                         if (!XGetWindowAttributes(dpy, wins[i], &wa))
1511                                 continue;
1512                         if (XGetTransientForHint(dpy, wins[i], &d1)
1513                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1514                                 manage(wins[i], &wa);
1515                 }
1516                 if (wins)
1517                         XFree(wins);
1518         }
1519 }
1520
1521 void
1522 sendmon(Client *c, Monitor *m)
1523 {
1524         if (c->mon == m)
1525                 return;
1526         unfocus(c, 1);
1527         detach(c);
1528         detachstack(c);
1529         c->mon = m;
1530         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1531         attach(c);
1532         attachstack(c);
1533         focus(NULL);
1534         arrange(NULL);
1535 }
1536
1537 void
1538 setclientstate(Client *c, long state)
1539 {
1540         long data[] = { state, None };
1541
1542         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1543                 PropModeReplace, (unsigned char *)data, 2);
1544 }
1545
1546 int
1547 sendevent(Client *c, Atom proto)
1548 {
1549         int n;
1550         Atom *protocols;
1551         int exists = 0;
1552         XEvent ev;
1553
1554         if (XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1555                 while (!exists && n--)
1556                         exists = protocols[n] == proto;
1557                 XFree(protocols);
1558         }
1559         if (exists) {
1560                 ev.type = ClientMessage;
1561                 ev.xclient.window = c->win;
1562                 ev.xclient.message_type = wmatom[WMProtocols];
1563                 ev.xclient.format = 32;
1564                 ev.xclient.data.l[0] = proto;
1565                 ev.xclient.data.l[1] = CurrentTime;
1566                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1567         }
1568         return exists;
1569 }
1570
1571 void
1572 setfocus(Client *c)
1573 {
1574         if (!c->neverfocus) {
1575                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1576                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1577                         XA_WINDOW, 32, PropModeReplace,
1578                         (unsigned char *) &(c->win), 1);
1579         }
1580         sendevent(c, wmatom[WMTakeFocus]);
1581 }
1582
1583 void
1584 setfullscreen(Client *c, int fullscreen)
1585 {
1586         if (fullscreen && !c->isfullscreen) {
1587                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1588                         PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1589                 c->isfullscreen = 1;
1590                 c->oldstate = c->isfloating;
1591                 c->oldbw = c->bw;
1592                 c->bw = 0;
1593                 c->isfloating = 1;
1594                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1595                 XRaiseWindow(dpy, c->win);
1596         } else if (!fullscreen && c->isfullscreen){
1597                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1598                         PropModeReplace, (unsigned char*)0, 0);
1599                 c->isfullscreen = 0;
1600                 c->isfloating = c->oldstate;
1601                 c->bw = c->oldbw;
1602                 c->x = c->oldx;
1603                 c->y = c->oldy;
1604                 c->w = c->oldw;
1605                 c->h = c->oldh;
1606                 resizeclient(c, c->x, c->y, c->w, c->h);
1607                 arrange(c->mon);
1608         }
1609 }
1610
1611 void
1612 setgaps(const Arg *arg)
1613 {
1614         if ((arg->i == 0) || (selmon->gappx + arg->i < 0))
1615                 selmon->gappx = 0;
1616         else
1617                 selmon->gappx += arg->i;
1618         arrange(selmon);
1619 }
1620
1621 void
1622 setlayout(const Arg *arg)
1623 {
1624         if (!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1625                 selmon->sellt ^= 1;
1626         if (arg && arg->v)
1627                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1628         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1629         if (selmon->sel)
1630                 arrange(selmon);
1631         else
1632                 drawbar(selmon);
1633 }
1634
1635 /* arg > 1.0 will set mfact absolutely */
1636 void
1637 setmfact(const Arg *arg)
1638 {
1639         float f;
1640
1641         if (!arg || !selmon->lt[selmon->sellt]->arrange)
1642                 return;
1643         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1644         if (f < 0.05 || f > 0.95)
1645                 return;
1646         selmon->mfact = f;
1647         arrange(selmon);
1648 }
1649
1650 void
1651 setup(void)
1652 {
1653         int i;
1654         XSetWindowAttributes wa;
1655         Atom utf8string;
1656
1657         /* clean up any zombies immediately */
1658         sigchld(0);
1659
1660         signal(SIGHUP, sighup);
1661         signal(SIGTERM, sigterm);
1662
1663         /* init screen */
1664         screen = DefaultScreen(dpy);
1665         sw = DisplayWidth(dpy, screen);
1666         sh = DisplayHeight(dpy, screen);
1667         root = RootWindow(dpy, screen);
1668         xinitvisual();
1669         drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap);
1670         if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
1671                 die("no fonts could be loaded.");
1672         lrpad = drw->fonts->h;
1673         bh = drw->fonts->h + 2;
1674         updategeom();
1675         /* init atoms */
1676         utf8string = XInternAtom(dpy, "UTF8_STRING", False);
1677         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1678         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1679         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1680         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1681         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1682         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1683         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1684         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1685         netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1686         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1687         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1688         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1689         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1690         /* init cursors */
1691         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1692         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1693         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1694         /* init appearance */
1695         scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
1696         for (i = 0; i < LENGTH(colors); i++)
1697                 scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3);
1698         /* init bars */
1699         updatebars();
1700         updatestatus();
1701         /* supporting window for NetWMCheck */
1702         wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
1703         XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
1704                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1705         XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
1706                 PropModeReplace, (unsigned char *) "dwm", 3);
1707         XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
1708                 PropModeReplace, (unsigned char *) &wmcheckwin, 1);
1709         /* EWMH support per view */
1710         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1711                 PropModeReplace, (unsigned char *) netatom, NetLast);
1712         XDeleteProperty(dpy, root, netatom[NetClientList]);
1713         /* select events */
1714         wa.cursor = cursor[CurNormal]->cursor;
1715         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
1716                 |ButtonPressMask|PointerMotionMask|EnterWindowMask
1717                 |LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1718         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1719         XSelectInput(dpy, root, wa.event_mask);
1720         grabkeys();
1721         focus(NULL);
1722 }
1723
1724
1725 void
1726 seturgent(Client *c, int urg)
1727 {
1728         XWMHints *wmh;
1729
1730         c->isurgent = urg;
1731         if (!(wmh = XGetWMHints(dpy, c->win)))
1732                 return;
1733         wmh->flags = urg ? (wmh->flags | XUrgencyHint) : (wmh->flags & ~XUrgencyHint);
1734         XSetWMHints(dpy, c->win, wmh);
1735         XFree(wmh);
1736 }
1737
1738 void
1739 showhide(Client *c)
1740 {
1741         if (!c)
1742                 return;
1743         if (ISVISIBLE(c)) {
1744                 /* show clients top down */
1745                 XMoveWindow(dpy, c->win, c->x, c->y);
1746                 if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1747                         resize(c, c->x, c->y, c->w, c->h, 0);
1748                 showhide(c->snext);
1749         } else {
1750                 /* hide clients bottom up */
1751                 showhide(c->snext);
1752                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1753         }
1754 }
1755
1756 void
1757 sigchld(int unused)
1758 {
1759         if (signal(SIGCHLD, sigchld) == SIG_ERR)
1760                 die("can't install SIGCHLD handler:");
1761         while (0 < waitpid(-1, NULL, WNOHANG));
1762 }
1763
1764 void
1765 sighup(int unused)
1766 {
1767         Arg a = {.i = 1};
1768         quit(&a);
1769 }
1770
1771 void
1772 sigterm(int unused)
1773 {
1774         Arg a = {.i = 0};
1775         quit(&a);
1776 }
1777
1778 void
1779 spawn(const Arg *arg)
1780 {
1781         if (arg->v == dmenucmd)
1782                 dmenumon[0] = '0' + selmon->num;
1783         if (fork() == 0) {
1784                 if (dpy)
1785                         close(ConnectionNumber(dpy));
1786                 setsid();
1787                 execvp(((char **)arg->v)[0], (char **)arg->v);
1788                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1789                 perror(" failed");
1790                 exit(EXIT_SUCCESS);
1791         }
1792 }
1793
1794 void
1795 tag(const Arg *arg)
1796 {
1797         if (selmon->sel && arg->ui & TAGMASK) {
1798                 selmon->sel->tags = arg->ui & TAGMASK;
1799                 focus(NULL);
1800                 arrange(selmon);
1801         }
1802 }
1803
1804 void
1805 tagmon(const Arg *arg)
1806 {
1807         if (!selmon->sel || !mons->next)
1808                 return;
1809         sendmon(selmon->sel, dirtomon(arg->i));
1810 }
1811
1812 void
1813 tile(Monitor *m)
1814 {
1815         unsigned int i, n, h, mw, my, ty;
1816         Client *c;
1817
1818         for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1819         if (n == 0)
1820                 return;
1821
1822         if (n > m->nmaster)
1823                 mw = m->nmaster ? m->ww * m->mfact : 0;
1824         else
1825                 mw = m->ww - m->gappx;
1826         for (i = 0, my = ty = m->gappx, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1827                 if (i < m->nmaster) {
1828                         h = (m->wh - my) / (MIN(n, m->nmaster) - i) - m->gappx;
1829                         resize(c, m->wx + m->gappx, m->wy + my, mw - (2*c->bw) - m->gappx, h - (2*c->bw), 0);
1830                         if (my + HEIGHT(c) + m->gappx < m->wh)
1831                                 my += HEIGHT(c) + m->gappx;
1832                 } else {
1833                         h = (m->wh - ty) / (n - i) - m->gappx;
1834                         resize(c, m->wx + mw + m->gappx, m->wy + ty, m->ww - mw - (2*c->bw) - 2*m->gappx, h - (2*c->bw), 0);
1835                         if (ty + HEIGHT(c) + m->gappx < m->wh)
1836                                 ty += HEIGHT(c) + m->gappx;
1837                 }
1838 }
1839
1840 void
1841 togglebar(const Arg *arg)
1842 {
1843         selmon->showbar = !selmon->showbar;
1844         updatebarpos(selmon);
1845         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1846         arrange(selmon);
1847 }
1848
1849 void
1850 togglefloating(const Arg *arg)
1851 {
1852         if (!selmon->sel)
1853                 return;
1854         if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
1855                 return;
1856         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1857         if (selmon->sel->isfloating)
1858                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1859                         selmon->sel->w, selmon->sel->h, 0);
1860         arrange(selmon);
1861 }
1862
1863 void
1864 togglefullscr(const Arg *arg)
1865 {
1866   if(selmon->sel)
1867     setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
1868 }
1869
1870 void
1871 toggletag(const Arg *arg)
1872 {
1873         unsigned int newtags;
1874
1875         if (!selmon->sel)
1876                 return;
1877         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1878         if (newtags) {
1879                 selmon->sel->tags = newtags;
1880                 focus(NULL);
1881                 arrange(selmon);
1882         }
1883 }
1884
1885 void
1886 toggleview(const Arg *arg)
1887 {
1888         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1889
1890         if (newtagset) {
1891                 selmon->tagset[selmon->seltags] = newtagset;
1892                 focus(NULL);
1893                 arrange(selmon);
1894         }
1895 }
1896
1897 void
1898 unfocus(Client *c, int setfocus)
1899 {
1900         if (!c)
1901                 return;
1902         grabbuttons(c, 0);
1903         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
1904         if (setfocus) {
1905                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1906                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1907         }
1908 }
1909
1910 void
1911 unmanage(Client *c, int destroyed)
1912 {
1913         Monitor *m = c->mon;
1914         XWindowChanges wc;
1915
1916         if (c->swallowing) {
1917                 unswallow(c);
1918                 return;
1919         }
1920
1921         Client *s = swallowingclient(c->win);
1922         if (s) {
1923                 free(s->swallowing);
1924                 s->swallowing = NULL;
1925                 arrange(m);
1926                 focus(NULL);
1927                 return;
1928         }
1929
1930         detach(c);
1931         detachstack(c);
1932         if (!destroyed) {
1933                 wc.border_width = c->oldbw;
1934                 XGrabServer(dpy); /* avoid race conditions */
1935                 XSetErrorHandler(xerrordummy);
1936                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1937                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1938                 setclientstate(c, WithdrawnState);
1939                 XSync(dpy, False);
1940                 XSetErrorHandler(xerror);
1941                 XUngrabServer(dpy);
1942         }
1943         free(c);
1944
1945         if (!s) {
1946                 arrange(m);
1947                 focus(NULL);
1948                 updateclientlist();
1949         }
1950 }
1951
1952 void
1953 unmapnotify(XEvent *e)
1954 {
1955         Client *c;
1956         XUnmapEvent *ev = &e->xunmap;
1957
1958         if ((c = wintoclient(ev->window))) {
1959                 if (ev->send_event)
1960                         setclientstate(c, WithdrawnState);
1961                 else
1962                         unmanage(c, 0);
1963         }
1964 }
1965
1966 void
1967 updatebars(void)
1968 {
1969         Monitor *m;
1970         XSetWindowAttributes wa = {
1971                 .override_redirect = True,
1972                 .background_pixel = 0,
1973                 .border_pixel = 0,
1974                 .colormap = cmap,
1975                 .event_mask = ButtonPressMask|ExposureMask
1976         };
1977         XClassHint ch = {"dwm", "dwm"};
1978         for (m = mons; m; m = m->next) {
1979                 if (m->barwin)
1980                         continue;
1981                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, depth,
1982                                           InputOutput, visual,
1983                                           CWOverrideRedirect|CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &wa);
1984                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1985                 XMapRaised(dpy, m->barwin);
1986                 XSetClassHint(dpy, m->barwin, &ch);
1987         }
1988 }
1989
1990 void
1991 updatebarpos(Monitor *m)
1992 {
1993         m->wy = m->my;
1994         m->wh = m->mh;
1995         if (m->showbar) {
1996                 m->wh -= bh;
1997                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1998                 m->wy = m->topbar ? m->wy + bh : m->wy;
1999         } else
2000                 m->by = -bh;
2001 }
2002
2003 void
2004 updateclientlist()
2005 {
2006         Client *c;
2007         Monitor *m;
2008
2009         XDeleteProperty(dpy, root, netatom[NetClientList]);
2010         for (m = mons; m; m = m->next)
2011                 for (c = m->clients; c; c = c->next)
2012                         XChangeProperty(dpy, root, netatom[NetClientList],
2013                                 XA_WINDOW, 32, PropModeAppend,
2014                                 (unsigned char *) &(c->win), 1);
2015 }
2016
2017 int
2018 updategeom(void)
2019 {
2020         int dirty = 0;
2021
2022 #ifdef XINERAMA
2023         if (XineramaIsActive(dpy)) {
2024                 int i, j, n, nn;
2025                 Client *c;
2026                 Monitor *m;
2027                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2028                 XineramaScreenInfo *unique = NULL;
2029
2030                 for (n = 0, m = mons; m; m = m->next, n++);
2031                 /* only consider unique geometries as separate screens */
2032                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
2033                 for (i = 0, j = 0; i < nn; i++)
2034                         if (isuniquegeom(unique, j, &info[i]))
2035                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2036                 XFree(info);
2037                 nn = j;
2038                 if (n <= nn) { /* new monitors available */
2039                         for (i = 0; i < (nn - n); i++) {
2040                                 for (m = mons; m && m->next; m = m->next);
2041                                 if (m)
2042                                         m->next = createmon();
2043                                 else
2044                                         mons = createmon();
2045                         }
2046                         for (i = 0, m = mons; i < nn && m; m = m->next, i++)
2047                                 if (i >= n
2048                                 || unique[i].x_org != m->mx || unique[i].y_org != m->my
2049                                 || unique[i].width != m->mw || unique[i].height != m->mh)
2050                                 {
2051                                         dirty = 1;
2052                                         m->num = i;
2053                                         m->mx = m->wx = unique[i].x_org;
2054                                         m->my = m->wy = unique[i].y_org;
2055                                         m->mw = m->ww = unique[i].width;
2056                                         m->mh = m->wh = unique[i].height;
2057                                         updatebarpos(m);
2058                                 }
2059                 } else { /* less monitors available nn < n */
2060                         for (i = nn; i < n; i++) {
2061                                 for (m = mons; m && m->next; m = m->next);
2062                                 while ((c = m->clients)) {
2063                                         dirty = 1;
2064                                         m->clients = c->next;
2065                                         detachstack(c);
2066                                         c->mon = mons;
2067                                         attach(c);
2068                                         attachstack(c);
2069                                 }
2070                                 if (m == selmon)
2071                                         selmon = mons;
2072                                 cleanupmon(m);
2073                         }
2074                 }
2075                 free(unique);
2076         } else
2077 #endif /* XINERAMA */
2078         { /* default monitor setup */
2079                 if (!mons)
2080                         mons = createmon();
2081                 if (mons->mw != sw || mons->mh != sh) {
2082                         dirty = 1;
2083                         mons->mw = mons->ww = sw;
2084                         mons->mh = mons->wh = sh;
2085                         updatebarpos(mons);
2086                 }
2087         }
2088         if (dirty) {
2089                 selmon = mons;
2090                 selmon = wintomon(root);
2091         }
2092         return dirty;
2093 }
2094
2095 void
2096 updatenumlockmask(void)
2097 {
2098         unsigned int i, j;
2099         XModifierKeymap *modmap;
2100
2101         numlockmask = 0;
2102         modmap = XGetModifierMapping(dpy);
2103         for (i = 0; i < 8; i++)
2104                 for (j = 0; j < modmap->max_keypermod; j++)
2105                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
2106                                 == XKeysymToKeycode(dpy, XK_Num_Lock))
2107                                 numlockmask = (1 << i);
2108         XFreeModifiermap(modmap);
2109 }
2110
2111 void
2112 updatesizehints(Client *c)
2113 {
2114         long msize;
2115         XSizeHints size;
2116
2117         if (!XGetWMNormalHints(dpy, c->win, &size, &msize))
2118                 /* size is uninitialized, ensure that size.flags aren't used */
2119                 size.flags = PSize;
2120         if (size.flags & PBaseSize) {
2121                 c->basew = size.base_width;
2122                 c->baseh = size.base_height;
2123         } else if (size.flags & PMinSize) {
2124                 c->basew = size.min_width;
2125                 c->baseh = size.min_height;
2126         } else
2127                 c->basew = c->baseh = 0;
2128         if (size.flags & PResizeInc) {
2129                 c->incw = size.width_inc;
2130                 c->inch = size.height_inc;
2131         } else
2132                 c->incw = c->inch = 0;
2133         if (size.flags & PMaxSize) {
2134                 c->maxw = size.max_width;
2135                 c->maxh = size.max_height;
2136         } else
2137                 c->maxw = c->maxh = 0;
2138         if (size.flags & PMinSize) {
2139                 c->minw = size.min_width;
2140                 c->minh = size.min_height;
2141         } else if (size.flags & PBaseSize) {
2142                 c->minw = size.base_width;
2143                 c->minh = size.base_height;
2144         } else
2145                 c->minw = c->minh = 0;
2146         if (size.flags & PAspect) {
2147                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2148                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2149         } else
2150                 c->maxa = c->mina = 0.0;
2151         c->isfixed = (c->maxw && c->maxh && c->maxw == c->minw && c->maxh == c->minh);
2152 }
2153
2154 void
2155 updatestatus(void)
2156 {
2157         if (!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2158                 strcpy(stext, "dwm-"VERSION);
2159         drawbar(selmon);
2160 }
2161
2162 void
2163 updatetitle(Client *c)
2164 {
2165         if (!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2166                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2167         if (c->name[0] == '\0') /* hack to mark broken clients */
2168                 strcpy(c->name, broken);
2169 }
2170
2171 void
2172 updatewindowtype(Client *c)
2173 {
2174         Atom state = getatomprop(c, netatom[NetWMState]);
2175         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2176
2177         if (state == netatom[NetWMFullscreen])
2178                 setfullscreen(c, 1);
2179         if (wtype == netatom[NetWMWindowTypeDialog])
2180                 c->isfloating = 1;
2181 }
2182
2183 void
2184 updatewmhints(Client *c)
2185 {
2186         XWMHints *wmh;
2187
2188         if ((wmh = XGetWMHints(dpy, c->win))) {
2189                 if (c == selmon->sel && wmh->flags & XUrgencyHint) {
2190                         wmh->flags &= ~XUrgencyHint;
2191                         XSetWMHints(dpy, c->win, wmh);
2192                 } else
2193                         c->isurgent = (wmh->flags & XUrgencyHint) ? 1 : 0;
2194                 if (wmh->flags & InputHint)
2195                         c->neverfocus = !wmh->input;
2196                 else
2197                         c->neverfocus = 0;
2198                 XFree(wmh);
2199         }
2200 }
2201
2202 void
2203 view(const Arg *arg)
2204 {
2205         if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2206                 return;
2207         selmon->seltags ^= 1; /* toggle sel tagset */
2208         if (arg->ui & TAGMASK)
2209                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2210         focus(NULL);
2211         arrange(selmon);
2212 }
2213
2214 pid_t
2215 winpid(Window w)
2216 {
2217
2218         pid_t result = 0;
2219
2220 #ifdef __linux__
2221         xcb_res_client_id_spec_t spec = {0};
2222         spec.client = w;
2223         spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;
2224
2225         xcb_generic_error_t *e = NULL;
2226         xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
2227         xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);
2228
2229         if (!r)
2230                 return (pid_t)0;
2231
2232         xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
2233         for (; i.rem; xcb_res_client_id_value_next(&i)) {
2234                 spec = i.data->spec;
2235                 if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
2236                         uint32_t *t = xcb_res_client_id_value_value(i.data);
2237                         result = *t;
2238                         break;
2239                 }
2240         }
2241
2242         free(r);
2243
2244         if (result == (pid_t)-1)
2245                 result = 0;
2246
2247 #endif /* __linux__ */
2248
2249 #ifdef __OpenBSD__
2250         Atom type;
2251         int format;
2252         unsigned long len, bytes;
2253         unsigned char *prop;
2254         pid_t ret;
2255
2256         if (XGetWindowProperty(dpy, w, XInternAtom(dpy, "_NET_WM_PID", 0), 0, 1, False, AnyPropertyType, &type, &format, &len, &bytes, &prop) != Success || !prop)
2257                return 0;
2258
2259         ret = *(pid_t*)prop;
2260         XFree(prop);
2261         result = ret;
2262
2263 #endif /* __OpenBSD__ */
2264         return result;
2265 }
2266
2267 pid_t
2268 getparentprocess(pid_t p)
2269 {
2270         unsigned int v = 0;
2271
2272 #ifdef __linux__
2273         FILE *f;
2274         char buf[256];
2275         snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);
2276
2277         if (!(f = fopen(buf, "r")))
2278                 return 0;
2279
2280         fscanf(f, "%*u %*s %*c %u", &v);
2281         fclose(f);
2282 #endif /* __linux__*/
2283
2284 #ifdef __OpenBSD__
2285         int n;
2286         kvm_t *kd;
2287         struct kinfo_proc *kp;
2288
2289         kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, NULL);
2290         if (!kd)
2291                 return 0;
2292
2293         kp = kvm_getprocs(kd, KERN_PROC_PID, p, sizeof(*kp), &n);
2294         v = kp->p_ppid;
2295 #endif /* __OpenBSD__ */
2296
2297         return (pid_t)v;
2298 }
2299
2300 int
2301 isdescprocess(pid_t p, pid_t c)
2302 {
2303         while (p != c && c != 0)
2304                 c = getparentprocess(c);
2305
2306         return (int)c;
2307 }
2308
2309 Client *
2310 termforwin(const Client *w)
2311 {
2312         Client *c;
2313         Monitor *m;
2314
2315         if (!w->pid || w->isterminal)
2316                 return NULL;
2317
2318         for (m = mons; m; m = m->next) {
2319                 for (c = m->clients; c; c = c->next) {
2320                         if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
2321                                 return c;
2322                 }
2323         }
2324
2325         return NULL;
2326 }
2327
2328 Client *
2329 swallowingclient(Window w)
2330 {
2331         Client *c;
2332         Monitor *m;
2333
2334         for (m = mons; m; m = m->next) {
2335                 for (c = m->clients; c; c = c->next) {
2336                         if (c->swallowing && c->swallowing->win == w)
2337                                 return c;
2338                 }
2339         }
2340
2341         return NULL;
2342 }
2343
2344 Client *
2345 wintoclient(Window w)
2346 {
2347         Client *c;
2348         Monitor *m;
2349
2350         for (m = mons; m; m = m->next)
2351                 for (c = m->clients; c; c = c->next)
2352                         if (c->win == w)
2353                                 return c;
2354         return NULL;
2355 }
2356
2357 Monitor *
2358 wintomon(Window w)
2359 {
2360         int x, y;
2361         Client *c;
2362         Monitor *m;
2363
2364         if (w == root && getrootptr(&x, &y))
2365                 return recttomon(x, y, 1, 1);
2366         for (m = mons; m; m = m->next)
2367                 if (w == m->barwin)
2368                         return m;
2369         if ((c = wintoclient(w)))
2370                 return c->mon;
2371         return selmon;
2372 }
2373
2374 /* There's no way to check accesses to destroyed windows, thus those cases are
2375  * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
2376  * default error handler, which may call exit. */
2377 int
2378 xerror(Display *dpy, XErrorEvent *ee)
2379 {
2380         if (ee->error_code == BadWindow
2381         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2382         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2383         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2384         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2385         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2386         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2387         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2388         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2389                 return 0;
2390         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2391                 ee->request_code, ee->error_code);
2392         return xerrorxlib(dpy, ee); /* may call exit */
2393 }
2394
2395 int
2396 xerrordummy(Display *dpy, XErrorEvent *ee)
2397 {
2398         return 0;
2399 }
2400
2401 /* Startup Error handler to check if another window manager
2402  * is already running. */
2403 int
2404 xerrorstart(Display *dpy, XErrorEvent *ee)
2405 {
2406         die("dwm: another window manager is already running");
2407         return -1;
2408 }
2409
2410 void
2411 xinitvisual()
2412 {
2413         XVisualInfo *infos;
2414         XRenderPictFormat *fmt;
2415         int nitems;
2416         int i;
2417
2418         XVisualInfo tpl = {
2419                 .screen = screen,
2420                 .depth = 32,
2421                 .class = TrueColor
2422         };
2423         long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
2424
2425         infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
2426         visual = NULL;
2427         for(i = 0; i < nitems; i ++) {
2428                 fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
2429                 if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
2430                         visual = infos[i].visual;
2431                         depth = infos[i].depth;
2432                         cmap = XCreateColormap(dpy, root, visual, AllocNone);
2433                         useargb = 1;
2434                         break;
2435                 }
2436         }
2437
2438         XFree(infos);
2439
2440         if (! visual) {
2441                 visual = DefaultVisual(dpy, screen);
2442                 depth = DefaultDepth(dpy, screen);
2443                 cmap = DefaultColormap(dpy, screen);
2444         }
2445 }
2446
2447 void
2448 zoom(const Arg *arg)
2449 {
2450         Client *c = selmon->sel;
2451
2452         if (!selmon->lt[selmon->sellt]->arrange
2453         || (selmon->sel && selmon->sel->isfloating))
2454                 return;
2455         if (c == nexttiled(selmon->clients))
2456                 if (!c || !(c = nexttiled(c->next)))
2457                         return;
2458         pop(c);
2459 }
2460
2461 void
2462 resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
2463 {
2464         char *sdst = NULL;
2465         int *idst = NULL;
2466         float *fdst = NULL;
2467
2468         sdst = dst;
2469         idst = dst;
2470         fdst = dst;
2471
2472         char fullname[256];
2473         char *type;
2474         XrmValue ret;
2475
2476         snprintf(fullname, sizeof(fullname), "%s.%s", "dwm", name);
2477         fullname[sizeof(fullname) - 1] = '\0';
2478
2479         XrmGetResource(db, fullname, "*", &type, &ret);
2480         if (!(ret.addr == NULL || strncmp("String", type, 64)))
2481         {
2482                 switch (rtype) {
2483                 case STRING:
2484                         strcpy(sdst, ret.addr);
2485                         break;
2486                 case INTEGER:
2487                         *idst = strtoul(ret.addr, NULL, 10);
2488                         break;
2489                 case FLOAT:
2490                         *fdst = strtof(ret.addr, NULL);
2491                         break;
2492                 }
2493         }
2494 }
2495
2496 void
2497 load_xresources(void)
2498 {
2499         Display *display;
2500         char *resm;
2501         XrmDatabase db;
2502         ResourcePref *p;
2503
2504         display = XOpenDisplay(NULL);
2505         resm = XResourceManagerString(display);
2506         if (!resm)
2507                 return;
2508
2509         db = XrmGetStringDatabase(resm);
2510         for (p = resources; p < resources + LENGTH(resources); p++)
2511                 resource_load(db, p->name, p->type, p->dst);
2512         XCloseDisplay(display);
2513 }
2514
2515 int
2516 main(int argc, char *argv[])
2517 {
2518         if (argc == 2 && !strcmp("-v", argv[1]))
2519                 die("dwm-"VERSION);
2520         else if (argc != 1)
2521                 die("usage: dwm [-v]");
2522         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2523                 fputs("warning: no locale support\n", stderr);
2524         if (!(dpy = XOpenDisplay(NULL)))
2525                 die("dwm: cannot open display");
2526         if (!(xcon = XGetXCBConnection(dpy)))
2527                 die("dwm: cannot get xcb connection\n");
2528         checkotherwm();
2529         XrmInitialize();
2530         load_xresources();
2531         setup();
2532 #ifdef __OpenBSD__
2533         if (pledge("stdio rpath proc exec ps", NULL) == -1)
2534                 die("pledge");
2535 #endif /* __OpenBSD__ */
2536         scan();
2537         run();
2538         if(restart) execvp(argv[0], argv);
2539         cleanup();
2540         XCloseDisplay(dpy);
2541         return EXIT_SUCCESS;
2542 }