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 <stdbool.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <sys/wait.h>
  34 #include <X11/cursorfont.h>
  35 #include <X11/keysym.h>
  36 #include <X11/Xatom.h>
  37 #include <X11/Xlib.h>
  38 #include <X11/Xproto.h>
  39 #include <X11/Xutil.h>
  40 #ifdef XINERAMA
  41 #include <X11/extensions/Xinerama.h>
  42 #endif /* XINERAMA */
  43 #include <X11/Xft/Xft.h>
  44
  45 #include "drw.h"
  46 #include "util.h"
  47
  48 /* macros */
  49 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  50 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  51 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  52                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  53 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  54 #define LENGTH(X)               (sizeof X / sizeof X[0])
  55 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  56 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  57 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  58 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  59 #define TEXTW(X)                (drw_text(drw, 0, 0, 0, 0, (X), 0) + drw->fonts[0]->h)
  60
  61 /* enums */
  62 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  63 enum { SchemeNorm, SchemeSel, SchemeLast }; /* color schemes */
  64 enum { NetSupported, NetWMName, NetWMState,
  65        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
  66        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
  67 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  68 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  69        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  70
  71 typedef union {
  72         int i;
  73         unsigned int ui;
  74         float f;
  75         const void *v;
  76 } Arg;
  77
  78 typedef struct {
  79         unsigned int click;
  80         unsigned int mask;
  81         unsigned int button;
  82         void (*func)(const Arg *arg);
  83         const Arg arg;
  84 } Button;
  85
  86 typedef struct Monitor Monitor;
  87 typedef struct Client Client;
  88 struct Client {
  89         char name[256];
  90         float mina, maxa;
  91         int x, y, w, h;
  92         int oldx, oldy, oldw, oldh;
  93         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  94         int bw, oldbw;
  95         unsigned int tags;
  96         bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
  97         Client *next;
  98         Client *snext;
  99         Monitor *mon;
 100         Window win;
 101 };
 102
 103 typedef struct {
 104         unsigned int mod;
 105         KeySym keysym;
 106         void (*func)(const Arg *);
 107         const Arg arg;
 108 } Key;
 109
 110 typedef struct {
 111         const char *symbol;
 112         void (*arrange)(Monitor *);
 113 } Layout;
 114
 115 struct Monitor {
 116         char ltsymbol[16];
 117         float mfact;
 118         int nmaster;
 119         int num;
 120         int by;               /* bar geometry */
 121         int mx, my, mw, mh;   /* screen size */
 122         int wx, wy, ww, wh;   /* window area  */
 123         unsigned int seltags;
 124         unsigned int sellt;
 125         unsigned int tagset[2];
 126         bool showbar;
 127         bool topbar;
 128         Client *clients;
 129         Client *sel;
 130         Client *stack;
 131         Monitor *next;
 132         Window barwin;
 133         const Layout *lt[2];
 134 };
 135
 136 typedef struct {
 137         const char *class;
 138         const char *instance;
 139         const char *title;
 140         unsigned int tags;
 141         bool isfloating;
 142         int monitor;
 143 } Rule;
 144
 145 /* function declarations */
 146 static void applyrules(Client *c);
 147 static bool applysizehints(Client *c, int *x, int *y, int *w, int *h, bool interact);
 148 static void arrange(Monitor *m);
 149 static void arrangemon(Monitor *m);
 150 static void attach(Client *c);
 151 static void attachstack(Client *c);
 152 static void buttonpress(XEvent *e);
 153 static void checkotherwm(void);
 154 static void cleanup(void);
 155 static void cleanupmon(Monitor *mon);
 156 static void clearurgent(Client *c);
 157 static void clientmessage(XEvent *e);
 158 static void configure(Client *c);
 159 static void configurenotify(XEvent *e);
 160 static void configurerequest(XEvent *e);
 161 static Monitor *createmon(void);
 162 static void destroynotify(XEvent *e);
 163 static void detach(Client *c);
 164 static void detachstack(Client *c);
 165 static Monitor *dirtomon(int dir);
 166 static void drawbar(Monitor *m);
 167 static void drawbars(void);
 168 static void enternotify(XEvent *e);
 169 static void expose(XEvent *e);
 170 static void focus(Client *c);
 171 static void focusin(XEvent *e);
 172 static void focusmon(const Arg *arg);
 173 static void focusstack(const Arg *arg);
 174 static bool getrootptr(int *x, int *y);
 175 static long getstate(Window w);
 176 static bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 177 static void grabbuttons(Client *c, bool focused);
 178 static void grabkeys(void);
 179 static void incnmaster(const Arg *arg);
 180 static void keypress(XEvent *e);
 181 static void killclient(const Arg *arg);
 182 static void manage(Window w, XWindowAttributes *wa);
 183 static void mappingnotify(XEvent *e);
 184 static void maprequest(XEvent *e);
 185 static void monocle(Monitor *m);
 186 static void motionnotify(XEvent *e);
 187 static void movemouse(const Arg *arg);
 188 static Client *nexttiled(Client *c);
 189 static void pop(Client *);
 190 static void propertynotify(XEvent *e);
 191 static void quit(const Arg *arg);
 192 static Monitor *recttomon(int x, int y, int w, int h);
 193 static void resize(Client *c, int x, int y, int w, int h, bool interact);
 194 static void resizeclient(Client *c, int x, int y, int w, int h);
 195 static void resizemouse(const Arg *arg);
 196 static void restack(Monitor *m);
 197 static void run(void);
 198 static void scan(void);
 199 static bool sendevent(Client *c, Atom proto);
 200 static void sendmon(Client *c, Monitor *m);
 201 static void setclientstate(Client *c, long state);
 202 static void setfocus(Client *c);
 203 static void setfullscreen(Client *c, bool fullscreen);
 204 static void setlayout(const Arg *arg);
 205 static void setmfact(const Arg *arg);
 206 static void setup(void);
 207 static void showhide(Client *c);
 208 static void sigchld(int unused);
 209 static void spawn(const Arg *arg);
 210 static void tag(const Arg *arg);
 211 static void tagmon(const Arg *arg);
 212 static void tile(Monitor *);
 213 static void togglebar(const Arg *arg);
 214 static void togglefloating(const Arg *arg);
 215 static void toggletag(const Arg *arg);
 216 static void toggleview(const Arg *arg);
 217 static void unfocus(Client *c, bool setfocus);
 218 static void unmanage(Client *c, bool destroyed);
 219 static void unmapnotify(XEvent *e);
 220 static bool updategeom(void);
 221 static void updatebarpos(Monitor *m);
 222 static void updatebars(void);
 223 static void updateclientlist(void);
 224 static void updatenumlockmask(void);
 225 static void updatesizehints(Client *c);
 226 static void updatestatus(void);
 227 static void updatewindowtype(Client *c);
 228 static void updatetitle(Client *c);
 229 static void updatewmhints(Client *c);
 230 static void view(const Arg *arg);
 231 static Client *wintoclient(Window w);
 232 static Monitor *wintomon(Window w);
 233 static int xerror(Display *dpy, XErrorEvent *ee);
 234 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 235 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 236 static void zoom(const Arg *arg);
 237
 238 /* variables */
 239 static const char broken[] = "broken";
 240 static char stext[256];
 241 static int screen;
 242 static int sw, sh;           /* X display screen geometry width, height */
 243 static int bh, blw = 0;      /* bar geometry */
 244 static int (*xerrorxlib)(Display *, XErrorEvent *);
 245 static unsigned int numlockmask = 0;
 246 static void (*handler[LASTEvent]) (XEvent *) = {
 247         [ButtonPress] = buttonpress,
 248         [ClientMessage] = clientmessage,
 249         [ConfigureRequest] = configurerequest,
 250         [ConfigureNotify] = configurenotify,
 251         [DestroyNotify] = destroynotify,
 252         [EnterNotify] = enternotify,
 253         [Expose] = expose,
 254         [FocusIn] = focusin,
 255         [KeyPress] = keypress,
 256         [MappingNotify] = mappingnotify,
 257         [MapRequest] = maprequest,
 258         [MotionNotify] = motionnotify,
 259         [PropertyNotify] = propertynotify,
 260         [UnmapNotify] = unmapnotify
 261 };
 262 static Atom wmatom[WMLast], netatom[NetLast];
 263 static bool running = true;
 264 static Cur *cursor[CurLast];
 265 static ClrScheme scheme[SchemeLast];
 266 static Display *dpy;
 267 static Drw *drw;
 268 static Monitor *mons, *selmon;
 269 static Window root;
 270
 271 /* configuration, allows nested code to access above variables */
 272 #include "config.h"
 273
 274 /* compile-time check if all tags fit into an unsigned int bit array. */
 275 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 276
 277 /* function implementations */
 278 void
 279 applyrules(Client *c) {
 280         const char *class, *instance;
 281         unsigned int i;
 282         const Rule *r;
 283         Monitor *m;
 284         XClassHint ch = { NULL, NULL };
 285
 286         /* rule matching */
 287         c->isfloating = false;
 288         c->tags = 0;
 289         XGetClassHint(dpy, c->win, &ch);
 290         class    = ch.res_class ? ch.res_class : broken;
 291         instance = ch.res_name  ? ch.res_name  : broken;
 292
 293         for(i = 0; i < LENGTH(rules); i++) {
 294                 r = &rules[i];
 295                 if((!r->title || strstr(c->name, r->title))
 296                 && (!r->class || strstr(class, r->class))
 297                 && (!r->instance || strstr(instance, r->instance)))
 298                 {
 299                         c->isfloating = r->isfloating;
 300                         c->tags |= r->tags;
 301                         for(m = mons; m && m->num != r->monitor; m = m->next);
 302                         if(m)
 303                                 c->mon = m;
 304                 }
 305         }
 306         if(ch.res_class)
 307                 XFree(ch.res_class);
 308         if(ch.res_name)
 309                 XFree(ch.res_name);
 310         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 311 }
 312
 313 bool
 314 applysizehints(Client *c, int *x, int *y, int *w, int *h, bool interact) {
 315         bool baseismin;
 316         Monitor *m = c->mon;
 317
 318         /* set minimum possible */
 319         *w = MAX(1, *w);
 320         *h = MAX(1, *h);
 321         if(interact) {
 322                 if(*x > sw)
 323                         *x = sw - WIDTH(c);
 324                 if(*y > sh)
 325                         *y = sh - HEIGHT(c);
 326                 if(*x + *w + 2 * c->bw < 0)
 327                         *x = 0;
 328                 if(*y + *h + 2 * c->bw < 0)
 329                         *y = 0;
 330         }
 331         else {
 332                 if(*x >= m->wx + m->ww)
 333                         *x = m->wx + m->ww - WIDTH(c);
 334                 if(*y >= m->wy + m->wh)
 335                         *y = m->wy + m->wh - HEIGHT(c);
 336                 if(*x + *w + 2 * c->bw <= m->wx)
 337                         *x = m->wx;
 338                 if(*y + *h + 2 * c->bw <= m->wy)
 339                         *y = m->wy;
 340         }
 341         if(*h < bh)
 342                 *h = bh;
 343         if(*w < bh)
 344                 *w = bh;
 345         if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 346                 /* see last two sentences in ICCCM 4.1.2.3 */
 347                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 348                 if(!baseismin) { /* temporarily remove base dimensions */
 349                         *w -= c->basew;
 350                         *h -= c->baseh;
 351                 }
 352                 /* adjust for aspect limits */
 353                 if(c->mina > 0 && c->maxa > 0) {
 354                         if(c->maxa < (float)*w / *h)
 355                                 *w = *h * c->maxa + 0.5;
 356                         else if(c->mina < (float)*h / *w)
 357                                 *h = *w * c->mina + 0.5;
 358                 }
 359                 if(baseismin) { /* increment calculation requires this */
 360                         *w -= c->basew;
 361                         *h -= c->baseh;
 362                 }
 363                 /* adjust for increment value */
 364                 if(c->incw)
 365                         *w -= *w % c->incw;
 366                 if(c->inch)
 367                         *h -= *h % c->inch;
 368                 /* restore base dimensions */
 369                 *w = MAX(*w + c->basew, c->minw);
 370                 *h = MAX(*h + c->baseh, c->minh);
 371                 if(c->maxw)
 372                         *w = MIN(*w, c->maxw);
 373                 if(c->maxh)
 374                         *h = MIN(*h, c->maxh);
 375         }
 376         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 377 }
 378
 379 void
 380 arrange(Monitor *m) {
 381         if(m)
 382                 showhide(m->stack);
 383         else for(m = mons; m; m = m->next)
 384                 showhide(m->stack);
 385         if(m) {
 386                 arrangemon(m);
 387                 restack(m);
 388         } else for(m = mons; m; m = m->next)
 389                 arrangemon(m);
 390 }
 391
 392 void
 393 arrangemon(Monitor *m) {
 394         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 395         if(m->lt[m->sellt]->arrange)
 396                 m->lt[m->sellt]->arrange(m);
 397 }
 398
 399 void
 400 attach(Client *c) {
 401         c->next = c->mon->clients;
 402         c->mon->clients = c;
 403 }
 404
 405 void
 406 attachstack(Client *c) {
 407         c->snext = c->mon->stack;
 408         c->mon->stack = c;
 409 }
 410
 411 void
 412 buttonpress(XEvent *e) {
 413         unsigned int i, x, click;
 414         Arg arg = {0};
 415         Client *c;
 416         Monitor *m;
 417         XButtonPressedEvent *ev = &e->xbutton;
 418
 419         click = ClkRootWin;
 420         /* focus monitor if necessary */
 421         if((m = wintomon(ev->window)) && m != selmon) {
 422                 unfocus(selmon->sel, true);
 423                 selmon = m;
 424                 focus(NULL);
 425         }
 426         if(ev->window == selmon->barwin) {
 427                 i = x = 0;
 428                 do
 429                         x += TEXTW(tags[i]);
 430                 while(ev->x >= x && ++i < LENGTH(tags));
 431                 if(i < LENGTH(tags)) {
 432                         click = ClkTagBar;
 433                         arg.ui = 1 << i;
 434                 }
 435                 else if(ev->x < x + blw)
 436                         click = ClkLtSymbol;
 437                 else if(ev->x > selmon->ww - TEXTW(stext))
 438                         click = ClkStatusText;
 439                 else
 440                         click = ClkWinTitle;
 441         }
 442         else if((c = wintoclient(ev->window))) {
 443                 focus(c);
 444                 click = ClkClientWin;
 445         }
 446         for(i = 0; i < LENGTH(buttons); i++)
 447                 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 448                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 449                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 450 }
 451
 452 void
 453 checkotherwm(void) {
 454         xerrorxlib = XSetErrorHandler(xerrorstart);
 455         /* this causes an error if some other window manager is running */
 456         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 457         XSync(dpy, False);
 458         XSetErrorHandler(xerror);
 459         XSync(dpy, False);
 460 }
 461
 462 void
 463 cleanup(void) {
 464         Arg a = {.ui = ~0};
 465         Layout foo = { "", NULL };
 466         Monitor *m;
 467         size_t i;
 468
 469         view(&a);
 470         selmon->lt[selmon->sellt] = &foo;
 471         for(m = mons; m; m = m->next)
 472                 while(m->stack)
 473                         unmanage(m->stack, false);
 474         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 475         while(mons)
 476                 cleanupmon(mons);
 477         for(i = 0; i < CurLast; i++)
 478                 drw_cur_free(drw, cursor[i]);
 479         for(i = 0; i < SchemeLast; i++) {
 480                 drw_clr_free(scheme[i].border);
 481                 drw_clr_free(scheme[i].bg);
 482                 drw_clr_free(scheme[i].fg);
 483         }
 484         drw_free(drw);
 485         XSync(dpy, False);
 486         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 487         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 488 }
 489
 490 void
 491 cleanupmon(Monitor *mon) {
 492         Monitor *m;
 493
 494         if(mon == mons)
 495                 mons = mons->next;
 496         else {
 497                 for(m = mons; m && m->next != mon; m = m->next);
 498                 m->next = mon->next;
 499         }
 500         XUnmapWindow(dpy, mon->barwin);
 501         XDestroyWindow(dpy, mon->barwin);
 502         free(mon);
 503 }
 504
 505 void
 506 clearurgent(Client *c) {
 507         XWMHints *wmh;
 508
 509         c->isurgent = false;
 510         if(!(wmh = XGetWMHints(dpy, c->win)))
 511                 return;
 512         wmh->flags &= ~XUrgencyHint;
 513         XSetWMHints(dpy, c->win, wmh);
 514         XFree(wmh);
 515 }
 516
 517 void
 518 clientmessage(XEvent *e) {
 519         XClientMessageEvent *cme = &e->xclient;
 520         Client *c = wintoclient(cme->window);
 521
 522         if(!c)
 523                 return;
 524         if(cme->message_type == netatom[NetWMState]) {
 525                 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 526                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 527                                       || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 528         }
 529         else if(cme->message_type == netatom[NetActiveWindow]) {
 530                 if(!ISVISIBLE(c)) {
 531                         c->mon->seltags ^= 1;
 532                         c->mon->tagset[c->mon->seltags] = c->tags;
 533                 }
 534                 pop(c);
 535         }
 536 }
 537
 538 void
 539 configure(Client *c) {
 540         XConfigureEvent ce;
 541
 542         ce.type = ConfigureNotify;
 543         ce.display = dpy;
 544         ce.event = c->win;
 545         ce.window = c->win;
 546         ce.x = c->x;
 547         ce.y = c->y;
 548         ce.width = c->w;
 549         ce.height = c->h;
 550         ce.border_width = c->bw;
 551         ce.above = None;
 552         ce.override_redirect = False;
 553         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 554 }
 555
 556 void
 557 configurenotify(XEvent *e) {
 558         Monitor *m;
 559         XConfigureEvent *ev = &e->xconfigure;
 560         bool dirty;
 561
 562         /* TODO: updategeom handling sucks, needs to be simplified */
 563         if(ev->window == root) {
 564                 dirty = (sw != ev->width || sh != ev->height);
 565                 sw = ev->width;
 566                 sh = ev->height;
 567                 if(updategeom() || dirty) {
 568                         drw_resize(drw, sw, bh);
 569                         updatebars();
 570                         for(m = mons; m; m = m->next)
 571                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 572                         focus(NULL);
 573                         arrange(NULL);
 574                 }
 575         }
 576 }
 577
 578 void
 579 configurerequest(XEvent *e) {
 580         Client *c;
 581         Monitor *m;
 582         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 583         XWindowChanges wc;
 584
 585         if((c = wintoclient(ev->window))) {
 586                 if(ev->value_mask & CWBorderWidth)
 587                         c->bw = ev->border_width;
 588                 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 589                         m = c->mon;
 590                         if(ev->value_mask & CWX) {
 591                                 c->oldx = c->x;
 592                                 c->x = m->mx + ev->x;
 593                         }
 594                         if(ev->value_mask & CWY) {
 595                                 c->oldy = c->y;
 596                                 c->y = m->my + ev->y;
 597                         }
 598                         if(ev->value_mask & CWWidth) {
 599                                 c->oldw = c->w;
 600                                 c->w = ev->width;
 601                         }
 602                         if(ev->value_mask & CWHeight) {
 603                                 c->oldh = c->h;
 604                                 c->h = ev->height;
 605                         }
 606                         if((c->x + c->w) > m->mx + m->mw && c->isfloating)
 607                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 608                         if((c->y + c->h) > m->my + m->mh && c->isfloating)
 609                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 610                         if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 611                                 configure(c);
 612                         if(ISVISIBLE(c))
 613                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 614                 }
 615                 else
 616                         configure(c);
 617         }
 618         else {
 619                 wc.x = ev->x;
 620                 wc.y = ev->y;
 621                 wc.width = ev->width;
 622                 wc.height = ev->height;
 623                 wc.border_width = ev->border_width;
 624                 wc.sibling = ev->above;
 625                 wc.stack_mode = ev->detail;
 626                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 627         }
 628         XSync(dpy, False);
 629 }
 630
 631 Monitor *
 632 createmon(void) {
 633         Monitor *m;
 634
 635         m = ecalloc(1, sizeof(Monitor));
 636         m->tagset[0] = m->tagset[1] = 1;
 637         m->mfact = mfact;
 638         m->nmaster = nmaster;
 639         m->showbar = showbar;
 640         m->topbar = topbar;
 641         m->lt[0] = &layouts[0];
 642         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 643         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 644         return m;
 645 }
 646
 647 void
 648 destroynotify(XEvent *e) {
 649         Client *c;
 650         XDestroyWindowEvent *ev = &e->xdestroywindow;
 651
 652         if((c = wintoclient(ev->window)))
 653                 unmanage(c, true);
 654 }
 655
 656 void
 657 detach(Client *c) {
 658         Client **tc;
 659
 660         for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 661         *tc = c->next;
 662 }
 663
 664 void
 665 detachstack(Client *c) {
 666         Client **tc, *t;
 667
 668         for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
 669         *tc = c->snext;
 670
 671         if(c == c->mon->sel) {
 672                 for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
 673                 c->mon->sel = t;
 674         }
 675 }
 676
 677 Monitor *
 678 dirtomon(int dir) {
 679         Monitor *m = NULL;
 680
 681         if(dir > 0) {
 682                 if(!(m = selmon->next))
 683                         m = mons;
 684         }
 685         else if(selmon == mons)
 686                 for(m = mons; m->next; m = m->next);
 687         else
 688                 for(m = mons; m->next != selmon; m = m->next);
 689         return m;
 690 }
 691
 692 void
 693 drawbar(Monitor *m) {
 694         int x, xx, w, dx;
 695         unsigned int i, occ = 0, urg = 0;
 696         Client *c;
 697
 698         dx = (drw->fonts[0]->ascent + drw->fonts[0]->descent + 2) / 4;
 699
 700         for(c = m->clients; c; c = c->next) {
 701                 occ |= c->tags;
 702                 if(c->isurgent)
 703                         urg |= c->tags;
 704         }
 705         x = 0;
 706         for(i = 0; i < LENGTH(tags); i++) {
 707                 w = TEXTW(tags[i]);
 708                 drw_setscheme(drw, m->tagset[m->seltags] & 1 << i ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 709                 drw_text(drw, x, 0, w, bh, tags[i], urg & 1 << i);
 710                 drw_rect(drw, x + 1, 1, dx, dx, m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 711                            occ & 1 << i, urg & 1 << i);
 712                 x += w;
 713         }
 714         w = blw = TEXTW(m->ltsymbol);
 715         drw_setscheme(drw, &scheme[SchemeNorm]);
 716         drw_text(drw, x, 0, w, bh, m->ltsymbol, 0);
 717         x += w;
 718         xx = x;
 719         if(m == selmon) { /* status is only drawn on selected monitor */
 720                 w = TEXTW(stext);
 721                 x = m->ww - w;
 722                 if(x < xx) {
 723                         x = xx;
 724                         w = m->ww - xx;
 725                 }
 726                 drw_text(drw, x, 0, w, bh, stext, 0);
 727         }
 728         else
 729                 x = m->ww;
 730         if((w = x - xx) > bh) {
 731                 x = xx;
 732                 if(m->sel) {
 733                         drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 734                         drw_text(drw, x, 0, w, bh, m->sel->name, 0);
 735                         drw_rect(drw, x + 1, 1, dx, dx, m->sel->isfixed, m->sel->isfloating, 0);
 736                 }
 737                 else {
 738                         drw_setscheme(drw, &scheme[SchemeNorm]);
 739                         drw_rect(drw, x, 0, w, bh, 1, 0, 1);
 740                 }
 741         }
 742         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 743 }
 744
 745 void
 746 drawbars(void) {
 747         Monitor *m;
 748
 749         for(m = mons; m; m = m->next)
 750                 drawbar(m);
 751 }
 752
 753 void
 754 enternotify(XEvent *e) {
 755         Client *c;
 756         Monitor *m;
 757         XCrossingEvent *ev = &e->xcrossing;
 758
 759         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 760                 return;
 761         c = wintoclient(ev->window);
 762         m = c ? c->mon : wintomon(ev->window);
 763         if(m != selmon) {
 764                 unfocus(selmon->sel, true);
 765                 selmon = m;
 766         }
 767         else if(!c || c == selmon->sel)
 768                 return;
 769         focus(c);
 770 }
 771
 772 void
 773 expose(XEvent *e) {
 774         Monitor *m;
 775         XExposeEvent *ev = &e->xexpose;
 776
 777         if(ev->count == 0 && (m = wintomon(ev->window)))
 778                 drawbar(m);
 779 }
 780
 781 void
 782 focus(Client *c) {
 783         if(!c || !ISVISIBLE(c))
 784                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 785         /* was if(selmon->sel) */
 786         if(selmon->sel && selmon->sel != c)
 787                 unfocus(selmon->sel, false);
 788         if(c) {
 789                 if(c->mon != selmon)
 790                         selmon = c->mon;
 791                 if(c->isurgent)
 792                         clearurgent(c);
 793                 detachstack(c);
 794                 attachstack(c);
 795                 grabbuttons(c, true);
 796                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->pix);
 797                 setfocus(c);
 798         }
 799         else {
 800                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 801                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 802         }
 803         selmon->sel = c;
 804         drawbars();
 805 }
 806
 807 void
 808 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 809         XFocusChangeEvent *ev = &e->xfocus;
 810
 811         if(selmon->sel && ev->window != selmon->sel->win)
 812                 setfocus(selmon->sel);
 813 }
 814
 815 void
 816 focusmon(const Arg *arg) {
 817         Monitor *m;
 818
 819         if(!mons->next)
 820                 return;
 821         if((m = dirtomon(arg->i)) == selmon)
 822                 return;
 823         unfocus(selmon->sel, false); /* s/true/false/ fixes input focus issues
 824                                         in gedit and anjuta */
 825         selmon = m;
 826         focus(NULL);
 827 }
 828
 829 void
 830 focusstack(const Arg *arg) {
 831         Client *c = NULL, *i;
 832
 833         if(!selmon->sel)
 834                 return;
 835         if(arg->i > 0) {
 836                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 837                 if(!c)
 838                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 839         }
 840         else {
 841                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 842                         if(ISVISIBLE(i))
 843                                 c = i;
 844                 if(!c)
 845                         for(; i; i = i->next)
 846                                 if(ISVISIBLE(i))
 847                                         c = i;
 848         }
 849         if(c) {
 850                 focus(c);
 851                 restack(selmon);
 852         }
 853 }
 854
 855 Atom
 856 getatomprop(Client *c, Atom prop) {
 857         int di;
 858         unsigned long dl;
 859         unsigned char *p = NULL;
 860         Atom da, atom = None;
 861
 862         if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 863                               &da, &di, &dl, &dl, &p) == Success && p) {
 864                 atom = *(Atom *)p;
 865                 XFree(p);
 866         }
 867         return atom;
 868 }
 869
 870 bool
 871 getrootptr(int *x, int *y) {
 872         int di;
 873         unsigned int dui;
 874         Window dummy;
 875
 876         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui) == True;
 877 }
 878
 879 long
 880 getstate(Window w) {
 881         int format;
 882         long result = -1;
 883         unsigned char *p = NULL;
 884         unsigned long n, extra;
 885         Atom real;
 886
 887         if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 888                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 889                 return -1;
 890         if(n != 0)
 891                 result = *p;
 892         XFree(p);
 893         return result;
 894 }
 895
 896 bool
 897 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 898         char **list = NULL;
 899         int n;
 900         XTextProperty name;
 901
 902         if(!text || size == 0)
 903                 return false;
 904         text[0] = '\0';
 905         XGetTextProperty(dpy, w, &name, atom);
 906         if(!name.nitems)
 907                 return false;
 908         if(name.encoding == XA_STRING)
 909                 strncpy(text, (char *)name.value, size - 1);
 910         else {
 911                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
 912                         strncpy(text, *list, size - 1);
 913                         XFreeStringList(list);
 914                 }
 915         }
 916         text[size - 1] = '\0';
 917         XFree(name.value);
 918         return true;
 919 }
 920
 921 void
 922 grabbuttons(Client *c, bool focused) {
 923         updatenumlockmask();
 924         {
 925                 unsigned int i, j;
 926                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 927                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
 928                 if(focused) {
 929                         for(i = 0; i < LENGTH(buttons); i++)
 930                                 if(buttons[i].click == ClkClientWin)
 931                                         for(j = 0; j < LENGTH(modifiers); j++)
 932                                                 XGrabButton(dpy, buttons[i].button,
 933                                                             buttons[i].mask | modifiers[j],
 934                                                             c->win, False, BUTTONMASK,
 935                                                             GrabModeAsync, GrabModeSync, None, None);
 936                 }
 937                 else
 938                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
 939                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
 940         }
 941 }
 942
 943 void
 944 grabkeys(void) {
 945         updatenumlockmask();
 946         {
 947                 unsigned int i, j;
 948                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
 949                 KeyCode code;
 950
 951                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
 952                 for(i = 0; i < LENGTH(keys); i++)
 953                         if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
 954                                 for(j = 0; j < LENGTH(modifiers); j++)
 955                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
 956                                                  True, GrabModeAsync, GrabModeAsync);
 957         }
 958 }
 959
 960 void
 961 incnmaster(const Arg *arg) {
 962         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
 963         arrange(selmon);
 964 }
 965
 966 #ifdef XINERAMA
 967 static bool
 968 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
 969         while(n--)
 970                 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
 971                 && unique[n].width == info->width && unique[n].height == info->height)
 972                         return false;
 973         return true;
 974 }
 975 #endif /* XINERAMA */
 976
 977 void
 978 keypress(XEvent *e) {
 979         unsigned int i;
 980         KeySym keysym;
 981         XKeyEvent *ev;
 982
 983         ev = &e->xkey;
 984         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 985         for(i = 0; i < LENGTH(keys); i++)
 986                 if(keysym == keys[i].keysym
 987                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
 988                 && keys[i].func)
 989                         keys[i].func(&(keys[i].arg));
 990 }
 991
 992 void
 993 killclient(const Arg *arg) {
 994         if(!selmon->sel)
 995                 return;
 996         if(!sendevent(selmon->sel, wmatom[WMDelete])) {
 997                 XGrabServer(dpy);
 998                 XSetErrorHandler(xerrordummy);
 999                 XSetCloseDownMode(dpy, DestroyAll);
1000                 XKillClient(dpy, selmon->sel->win);
1001                 XSync(dpy, False);
1002                 XSetErrorHandler(xerror);
1003                 XUngrabServer(dpy);
1004         }
1005 }
1006
1007 void
1008 manage(Window w, XWindowAttributes *wa) {
1009         Client *c, *t = NULL;
1010         Window trans = None;
1011         XWindowChanges wc;
1012
1013         c = ecalloc(1, sizeof(Client));
1014         c->win = w;
1015         updatetitle(c);
1016         if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1017                 c->mon = t->mon;
1018                 c->tags = t->tags;
1019         }
1020         else {
1021                 c->mon = selmon;
1022                 applyrules(c);
1023         }
1024         /* geometry */
1025         c->x = c->oldx = wa->x;
1026         c->y = c->oldy = wa->y;
1027         c->w = c->oldw = wa->width;
1028         c->h = c->oldh = wa->height;
1029         c->oldbw = wa->border_width;
1030
1031         if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1032                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1033         if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1034                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1035         c->x = MAX(c->x, c->mon->mx);
1036         /* only fix client y-offset, if the client center might cover the bar */
1037         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1038                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1039         c->bw = borderpx;
1040
1041         wc.border_width = c->bw;
1042         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1043         XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->pix);
1044         configure(c); /* propagates border_width, if size doesn't change */
1045         updatewindowtype(c);
1046         updatesizehints(c);
1047         updatewmhints(c);
1048         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1049         grabbuttons(c, false);
1050         if(!c->isfloating)
1051                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1052         if(c->isfloating)
1053                 XRaiseWindow(dpy, c->win);
1054         attach(c);
1055         attachstack(c);
1056         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1057                         (unsigned char *) &(c->win), 1);
1058         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1059         setclientstate(c, NormalState);
1060         if (c->mon == selmon)
1061                 unfocus(selmon->sel, false);
1062         c->mon->sel = c;
1063         arrange(c->mon);
1064         XMapWindow(dpy, c->win);
1065         focus(NULL);
1066 }
1067
1068 void
1069 mappingnotify(XEvent *e) {
1070         XMappingEvent *ev = &e->xmapping;
1071
1072         XRefreshKeyboardMapping(ev);
1073         if(ev->request == MappingKeyboard)
1074                 grabkeys();
1075 }
1076
1077 void
1078 maprequest(XEvent *e) {
1079         static XWindowAttributes wa;
1080         XMapRequestEvent *ev = &e->xmaprequest;
1081
1082         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1083                 return;
1084         if(wa.override_redirect)
1085                 return;
1086         if(!wintoclient(ev->window))
1087                 manage(ev->window, &wa);
1088 }
1089
1090 void
1091 monocle(Monitor *m) {
1092         unsigned int n = 0;
1093         Client *c;
1094
1095         for(c = m->clients; c; c = c->next)
1096                 if(ISVISIBLE(c))
1097                         n++;
1098         if(n > 0) /* override layout symbol */
1099                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1100         for(c = nexttiled(m->clients); c; c = nexttiled(c->next))
1101                 resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, false);
1102 }
1103
1104 void
1105 motionnotify(XEvent *e) {
1106         static Monitor *mon = NULL;
1107         Monitor *m;
1108         XMotionEvent *ev = &e->xmotion;
1109
1110         if(ev->window != root)
1111                 return;
1112         if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1113                 unfocus(selmon->sel, true);
1114                 selmon = m;
1115                 focus(NULL);
1116         }
1117         mon = m;
1118 }
1119
1120 void
1121 movemouse(const Arg *arg) {
1122         int x, y, ocx, ocy, nx, ny;
1123         Client *c;
1124         Monitor *m;
1125         XEvent ev;
1126         Time lasttime = 0;
1127
1128         if(!(c = selmon->sel))
1129                 return;
1130         if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1131                 return;
1132         restack(selmon);
1133         ocx = c->x;
1134         ocy = c->y;
1135         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1136         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1137                 return;
1138         if(!getrootptr(&x, &y))
1139                 return;
1140         do {
1141                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1142                 switch(ev.type) {
1143                 case ConfigureRequest:
1144                 case Expose:
1145                 case MapRequest:
1146                         handler[ev.type](&ev);
1147                         break;
1148                 case MotionNotify:
1149                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1150                                 continue;
1151                         lasttime = ev.xmotion.time;
1152
1153                         nx = ocx + (ev.xmotion.x - x);
1154                         ny = ocy + (ev.xmotion.y - y);
1155                         if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1156                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1157                                 if(abs(selmon->wx - nx) < snap)
1158                                         nx = selmon->wx;
1159                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1160                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1161                                 if(abs(selmon->wy - ny) < snap)
1162                                         ny = selmon->wy;
1163                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1164                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1165                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1166                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1167                                         togglefloating(NULL);
1168                         }
1169                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1170                                 resize(c, nx, ny, c->w, c->h, true);
1171                         break;
1172                 }
1173         } while(ev.type != ButtonRelease);
1174         XUngrabPointer(dpy, CurrentTime);
1175         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1176                 sendmon(c, m);
1177                 selmon = m;
1178                 focus(NULL);
1179         }
1180 }
1181
1182 Client *
1183 nexttiled(Client *c) {
1184         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1185         return c;
1186 }
1187
1188 void
1189 pop(Client *c) {
1190         detach(c);
1191         attach(c);
1192         focus(c);
1193         arrange(c->mon);
1194 }
1195
1196 void
1197 propertynotify(XEvent *e) {
1198         Client *c;
1199         Window trans;
1200         XPropertyEvent *ev = &e->xproperty;
1201
1202         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1203                 updatestatus();
1204         else if(ev->state == PropertyDelete)
1205                 return; /* ignore */
1206         else if((c = wintoclient(ev->window))) {
1207                 switch(ev->atom) {
1208                 default: break;
1209                 case XA_WM_TRANSIENT_FOR:
1210                         if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1211                            (c->isfloating = (wintoclient(trans)) != NULL))
1212                                 arrange(c->mon);
1213                         break;
1214                 case XA_WM_NORMAL_HINTS:
1215                         updatesizehints(c);
1216                         break;
1217                 case XA_WM_HINTS:
1218                         updatewmhints(c);
1219                         drawbars();
1220                         break;
1221                 }
1222                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1223                         updatetitle(c);
1224                         if(c == c->mon->sel)
1225                                 drawbar(c->mon);
1226                 }
1227                 if(ev->atom == netatom[NetWMWindowType])
1228                         updatewindowtype(c);
1229         }
1230 }
1231
1232 void
1233 quit(const Arg *arg) {
1234         running = false;
1235 }
1236
1237 Monitor *
1238 recttomon(int x, int y, int w, int h) {
1239         Monitor *m, *r = selmon;
1240         int a, area = 0;
1241
1242         for(m = mons; m; m = m->next)
1243                 if((a = INTERSECT(x, y, w, h, m)) > area) {
1244                         area = a;
1245                         r = m;
1246                 }
1247         return r;
1248 }
1249
1250 void
1251 resize(Client *c, int x, int y, int w, int h, bool interact) {
1252         if(applysizehints(c, &x, &y, &w, &h, interact))
1253                 resizeclient(c, x, y, w, h);
1254 }
1255
1256 void
1257 resizeclient(Client *c, int x, int y, int w, int h) {
1258         XWindowChanges wc;
1259
1260         c->oldx = c->x; c->x = wc.x = x;
1261         c->oldy = c->y; c->y = wc.y = y;
1262         c->oldw = c->w; c->w = wc.width = w;
1263         c->oldh = c->h; c->h = wc.height = h;
1264         wc.border_width = c->bw;
1265         XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
1266         configure(c);
1267         XSync(dpy, False);
1268 }
1269
1270 void
1271 resizemouse(const Arg *arg) {
1272         int ocx, ocy, nw, nh;
1273         Client *c;
1274         Monitor *m;
1275         XEvent ev;
1276         Time lasttime = 0;
1277
1278         if(!(c = selmon->sel))
1279                 return;
1280         if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1281                 return;
1282         restack(selmon);
1283         ocx = c->x;
1284         ocy = c->y;
1285         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1286                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1287                 return;
1288         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1289         do {
1290                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1291                 switch(ev.type) {
1292                 case ConfigureRequest:
1293                 case Expose:
1294                 case MapRequest:
1295                         handler[ev.type](&ev);
1296                         break;
1297                 case MotionNotify:
1298                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1299                                 continue;
1300                         lasttime = ev.xmotion.time;
1301
1302                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1303                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1304                         if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1305                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1306                         {
1307                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1308                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1309                                         togglefloating(NULL);
1310                         }
1311                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1312                                 resize(c, c->x, c->y, nw, nh, true);
1313                         break;
1314                 }
1315         } while(ev.type != ButtonRelease);
1316         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1317         XUngrabPointer(dpy, CurrentTime);
1318         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1319         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1320                 sendmon(c, m);
1321                 selmon = m;
1322                 focus(NULL);
1323         }
1324 }
1325
1326 void
1327 restack(Monitor *m) {
1328         Client *c;
1329         XEvent ev;
1330         XWindowChanges wc;
1331
1332         drawbar(m);
1333         if(!m->sel)
1334                 return;
1335         if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1336                 XRaiseWindow(dpy, m->sel->win);
1337         if(m->lt[m->sellt]->arrange) {
1338                 wc.stack_mode = Below;
1339                 wc.sibling = m->barwin;
1340                 for(c = m->stack; c; c = c->snext)
1341                         if(!c->isfloating && ISVISIBLE(c)) {
1342                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1343                                 wc.sibling = c->win;
1344                         }
1345         }
1346         XSync(dpy, False);
1347         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1348 }
1349
1350 void
1351 run(void) {
1352         XEvent ev;
1353         /* main event loop */
1354         XSync(dpy, False);
1355         while(running && !XNextEvent(dpy, &ev))
1356                 if(handler[ev.type])
1357                         handler[ev.type](&ev); /* call handler */
1358 }
1359
1360 void
1361 scan(void) {
1362         unsigned int i, num;
1363         Window d1, d2, *wins = NULL;
1364         XWindowAttributes wa;
1365
1366         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1367                 for(i = 0; i < num; i++) {
1368                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1369                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1370                                 continue;
1371                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1372                                 manage(wins[i], &wa);
1373                 }
1374                 for(i = 0; i < num; i++) { /* now the transients */
1375                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1376                                 continue;
1377                         if(XGetTransientForHint(dpy, wins[i], &d1)
1378                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1379                                 manage(wins[i], &wa);
1380                 }
1381                 if(wins)
1382                         XFree(wins);
1383         }
1384 }
1385
1386 void
1387 sendmon(Client *c, Monitor *m) {
1388         if(c->mon == m)
1389                 return;
1390         unfocus(c, true);
1391         detach(c);
1392         detachstack(c);
1393         c->mon = m;
1394         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1395         attach(c);
1396         attachstack(c);
1397         focus(NULL);
1398         arrange(NULL);
1399 }
1400
1401 void
1402 setclientstate(Client *c, long state) {
1403         long data[] = { state, None };
1404
1405         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1406                         PropModeReplace, (unsigned char *)data, 2);
1407 }
1408
1409 bool
1410 sendevent(Client *c, Atom proto) {
1411         int n;
1412         Atom *protocols;
1413         bool exists = false;
1414         XEvent ev;
1415
1416         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1417                 while(!exists && n--)
1418                         exists = protocols[n] == proto;
1419                 XFree(protocols);
1420         }
1421         if(exists) {
1422                 ev.type = ClientMessage;
1423                 ev.xclient.window = c->win;
1424                 ev.xclient.message_type = wmatom[WMProtocols];
1425                 ev.xclient.format = 32;
1426                 ev.xclient.data.l[0] = proto;
1427                 ev.xclient.data.l[1] = CurrentTime;
1428                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1429         }
1430         return exists;
1431 }
1432
1433 void
1434 setfocus(Client *c) {
1435         if(!c->neverfocus) {
1436                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1437                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1438                                 XA_WINDOW, 32, PropModeReplace,
1439                                 (unsigned char *) &(c->win), 1);
1440         }
1441         sendevent(c, wmatom[WMTakeFocus]);
1442 }
1443
1444 void
1445 setfullscreen(Client *c, bool fullscreen) {
1446         if(fullscreen && !c->isfullscreen) {
1447                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1448                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1449                 c->isfullscreen = true;
1450                 c->oldstate = c->isfloating;
1451                 c->oldbw = c->bw;
1452                 c->bw = 0;
1453                 c->isfloating = true;
1454                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
1455                 XRaiseWindow(dpy, c->win);
1456         }
1457         else if(!fullscreen && c->isfullscreen){
1458                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1459                                 PropModeReplace, (unsigned char*)0, 0);
1460                 c->isfullscreen = false;
1461                 c->isfloating = c->oldstate;
1462                 c->bw = c->oldbw;
1463                 c->x = c->oldx;
1464                 c->y = c->oldy;
1465                 c->w = c->oldw;
1466                 c->h = c->oldh;
1467                 resizeclient(c, c->x, c->y, c->w, c->h);
1468                 arrange(c->mon);
1469         }
1470 }
1471
1472 void
1473 setlayout(const Arg *arg) {
1474         if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1475                 selmon->sellt ^= 1;
1476         if(arg && arg->v)
1477                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1478         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1479         if(selmon->sel)
1480                 arrange(selmon);
1481         else
1482                 drawbar(selmon);
1483 }
1484
1485 /* arg > 1.0 will set mfact absolutly */
1486 void
1487 setmfact(const Arg *arg) {
1488         float f;
1489
1490         if(!arg || !selmon->lt[selmon->sellt]->arrange)
1491                 return;
1492         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1493         if(f < 0.1 || f > 0.9)
1494                 return;
1495         selmon->mfact = f;
1496         arrange(selmon);
1497 }
1498
1499 void
1500 setup(void) {
1501         XSetWindowAttributes wa;
1502
1503         /* clean up any zombies immediately */
1504         sigchld(0);
1505
1506         /* init screen */
1507         screen = DefaultScreen(dpy);
1508         sw = DisplayWidth(dpy, screen);
1509         sh = DisplayHeight(dpy, screen);
1510         root = RootWindow(dpy, screen);
1511         drw = drw_create(dpy, screen, root, sw, sh);
1512         drw_load_fonts(drw, fonts, LENGTH(fonts));
1513         if (!drw->fontcount)
1514                 die("no fonts could be loaded.\n");
1515         bh = drw->fonts[0]->h + 2;
1516         updategeom();
1517         /* init atoms */
1518         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1519         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1520         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1521         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1522         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1523         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1524         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1525         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1526         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1527         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1528         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1529         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1530         /* init cursors */
1531         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1532         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1533         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1534         /* init appearance */
1535         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1536         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1537         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1538         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1539         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1540         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1541         /* init bars */
1542         updatebars();
1543         updatestatus();
1544         /* EWMH support per view */
1545         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1546                         PropModeReplace, (unsigned char *) netatom, NetLast);
1547         XDeleteProperty(dpy, root, netatom[NetClientList]);
1548         /* select for events */
1549         wa.cursor = cursor[CurNormal]->cursor;
1550         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1551                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1552         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1553         XSelectInput(dpy, root, wa.event_mask);
1554         grabkeys();
1555         focus(NULL);
1556 }
1557
1558 void
1559 showhide(Client *c) {
1560         if(!c)
1561                 return;
1562         if(ISVISIBLE(c)) { /* show clients top down */
1563                 XMoveWindow(dpy, c->win, c->x, c->y);
1564                 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1565                         resize(c, c->x, c->y, c->w, c->h, false);
1566                 showhide(c->snext);
1567         }
1568         else { /* hide clients bottom up */
1569                 showhide(c->snext);
1570                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1571         }
1572 }
1573
1574 void
1575 sigchld(int unused) {
1576         if(signal(SIGCHLD, sigchld) == SIG_ERR)
1577                 die("can't install SIGCHLD handler:");
1578         while(0 < waitpid(-1, NULL, WNOHANG));
1579 }
1580
1581 void
1582 spawn(const Arg *arg) {
1583         if(arg->v == dmenucmd)
1584                 dmenumon[0] = '0' + selmon->num;
1585         if(fork() == 0) {
1586                 if(dpy)
1587                         close(ConnectionNumber(dpy));
1588                 setsid();
1589                 execvp(((char **)arg->v)[0], (char **)arg->v);
1590                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1591                 perror(" failed");
1592                 exit(EXIT_SUCCESS);
1593         }
1594 }
1595
1596 void
1597 tag(const Arg *arg) {
1598         if(selmon->sel && arg->ui & TAGMASK) {
1599                 selmon->sel->tags = arg->ui & TAGMASK;
1600                 focus(NULL);
1601                 arrange(selmon);
1602         }
1603 }
1604
1605 void
1606 tagmon(const Arg *arg) {
1607         if(!selmon->sel || !mons->next)
1608                 return;
1609         sendmon(selmon->sel, dirtomon(arg->i));
1610 }
1611
1612 void
1613 tile(Monitor *m) {
1614         unsigned int i, n, h, mw, my, ty;
1615         Client *c;
1616
1617         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1618         if(n == 0)
1619                 return;
1620
1621         if(n > m->nmaster)
1622                 mw = m->nmaster ? m->ww * m->mfact : 0;
1623         else
1624                 mw = m->ww;
1625         for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1626                 if(i < m->nmaster) {
1627                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1628                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), false);
1629                         my += HEIGHT(c);
1630                 }
1631                 else {
1632                         h = (m->wh - ty) / (n - i);
1633                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), false);
1634                         ty += HEIGHT(c);
1635                 }
1636 }
1637
1638 void
1639 togglebar(const Arg *arg) {
1640         selmon->showbar = !selmon->showbar;
1641         updatebarpos(selmon);
1642         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1643         arrange(selmon);
1644 }
1645
1646 void
1647 togglefloating(const Arg *arg) {
1648         if(!selmon->sel)
1649                 return;
1650         if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1651                 return;
1652         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1653         if(selmon->sel->isfloating)
1654                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1655                        selmon->sel->w, selmon->sel->h, false);
1656         arrange(selmon);
1657 }
1658
1659 void
1660 toggletag(const Arg *arg) {
1661         unsigned int newtags;
1662
1663         if(!selmon->sel)
1664                 return;
1665         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1666         if(newtags) {
1667                 selmon->sel->tags = newtags;
1668                 focus(NULL);
1669                 arrange(selmon);
1670         }
1671 }
1672
1673 void
1674 toggleview(const Arg *arg) {
1675         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1676
1677         if(newtagset) {
1678                 selmon->tagset[selmon->seltags] = newtagset;
1679                 focus(NULL);
1680                 arrange(selmon);
1681         }
1682 }
1683
1684 void
1685 unfocus(Client *c, bool setfocus) {
1686         if(!c)
1687                 return;
1688         grabbuttons(c, false);
1689         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->pix);
1690         if(setfocus) {
1691                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1692                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1693         }
1694 }
1695
1696 void
1697 unmanage(Client *c, bool destroyed) {
1698         Monitor *m = c->mon;
1699         XWindowChanges wc;
1700
1701         /* The server grab construct avoids race conditions. */
1702         detach(c);
1703         detachstack(c);
1704         if(!destroyed) {
1705                 wc.border_width = c->oldbw;
1706                 XGrabServer(dpy);
1707                 XSetErrorHandler(xerrordummy);
1708                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1709                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1710                 setclientstate(c, WithdrawnState);
1711                 XSync(dpy, False);
1712                 XSetErrorHandler(xerror);
1713                 XUngrabServer(dpy);
1714         }
1715         free(c);
1716         focus(NULL);
1717         updateclientlist();
1718         arrange(m);
1719 }
1720
1721 void
1722 unmapnotify(XEvent *e) {
1723         Client *c;
1724         XUnmapEvent *ev = &e->xunmap;
1725
1726         if((c = wintoclient(ev->window))) {
1727                 if(ev->send_event)
1728                         setclientstate(c, WithdrawnState);
1729                 else
1730                         unmanage(c, false);
1731         }
1732 }
1733
1734 void
1735 updatebars(void) {
1736         Monitor *m;
1737         XSetWindowAttributes wa = {
1738                 .override_redirect = True,
1739                 .background_pixmap = ParentRelative,
1740                 .event_mask = ButtonPressMask|ExposureMask
1741         };
1742         for(m = mons; m; m = m->next) {
1743                 if (m->barwin)
1744                         continue;
1745                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1746                                           CopyFromParent, DefaultVisual(dpy, screen),
1747                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1748                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1749                 XMapRaised(dpy, m->barwin);
1750         }
1751 }
1752
1753 void
1754 updatebarpos(Monitor *m) {
1755         m->wy = m->my;
1756         m->wh = m->mh;
1757         if(m->showbar) {
1758                 m->wh -= bh;
1759                 m->by = m->topbar ? m->wy : m->wy + m->wh;
1760                 m->wy = m->topbar ? m->wy + bh : m->wy;
1761         }
1762         else
1763                 m->by = -bh;
1764 }
1765
1766 void
1767 updateclientlist() {
1768         Client *c;
1769         Monitor *m;
1770
1771         XDeleteProperty(dpy, root, netatom[NetClientList]);
1772         for(m = mons; m; m = m->next)
1773                 for(c = m->clients; c; c = c->next)
1774                         XChangeProperty(dpy, root, netatom[NetClientList],
1775                                         XA_WINDOW, 32, PropModeAppend,
1776                                         (unsigned char *) &(c->win), 1);
1777 }
1778
1779 bool
1780 updategeom(void) {
1781         bool dirty = false;
1782
1783 #ifdef XINERAMA
1784         if(XineramaIsActive(dpy)) {
1785                 int i, j, n, nn;
1786                 Client *c;
1787                 Monitor *m;
1788                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
1789                 XineramaScreenInfo *unique = NULL;
1790
1791                 for(n = 0, m = mons; m; m = m->next, n++);
1792                 /* only consider unique geometries as separate screens */
1793                 unique = ecalloc(nn, sizeof(XineramaScreenInfo));
1794                 for(i = 0, j = 0; i < nn; i++)
1795                         if(isuniquegeom(unique, j, &info[i]))
1796                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
1797                 XFree(info);
1798                 nn = j;
1799                 if(n <= nn) {
1800                         for(i = 0; i < (nn - n); i++) { /* new monitors available */
1801                                 for(m = mons; m && m->next; m = m->next);
1802                                 if(m)
1803                                         m->next = createmon();
1804                                 else
1805                                         mons = createmon();
1806                         }
1807                         for(i = 0, m = mons; i < nn && m; m = m->next, i++)
1808                                 if(i >= n
1809                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
1810                                     || unique[i].width != m->mw || unique[i].height != m->mh))
1811                                 {
1812                                         dirty = true;
1813                                         m->num = i;
1814                                         m->mx = m->wx = unique[i].x_org;
1815                                         m->my = m->wy = unique[i].y_org;
1816                                         m->mw = m->ww = unique[i].width;
1817                                         m->mh = m->wh = unique[i].height;
1818                                         updatebarpos(m);
1819                                 }
1820                 }
1821                 else { /* less monitors available nn < n */
1822                         for(i = nn; i < n; i++) {
1823                                 for(m = mons; m && m->next; m = m->next);
1824                                 while(m->clients) {
1825                                         dirty = true;
1826                                         c = m->clients;
1827                                         m->clients = c->next;
1828                                         detachstack(c);
1829                                         c->mon = mons;
1830                                         attach(c);
1831                                         attachstack(c);
1832                                 }
1833                                 if(m == selmon)
1834                                         selmon = mons;
1835                                 cleanupmon(m);
1836                         }
1837                 }
1838                 free(unique);
1839         }
1840         else
1841 #endif /* XINERAMA */
1842         /* default monitor setup */
1843         {
1844                 if(!mons)
1845                         mons = createmon();
1846                 if(mons->mw != sw || mons->mh != sh) {
1847                         dirty = true;
1848                         mons->mw = mons->ww = sw;
1849                         mons->mh = mons->wh = sh;
1850                         updatebarpos(mons);
1851                 }
1852         }
1853         if(dirty) {
1854                 selmon = mons;
1855                 selmon = wintomon(root);
1856         }
1857         return dirty;
1858 }
1859
1860 void
1861 updatenumlockmask(void) {
1862         unsigned int i, j;
1863         XModifierKeymap *modmap;
1864
1865         numlockmask = 0;
1866         modmap = XGetModifierMapping(dpy);
1867         for(i = 0; i < 8; i++)
1868                 for(j = 0; j < modmap->max_keypermod; j++)
1869                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
1870                            == XKeysymToKeycode(dpy, XK_Num_Lock))
1871                                 numlockmask = (1 << i);
1872         XFreeModifiermap(modmap);
1873 }
1874
1875 void
1876 updatesizehints(Client *c) {
1877         long msize;
1878         XSizeHints size;
1879
1880         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
1881                 /* size is uninitialized, ensure that size.flags aren't used */
1882                 size.flags = PSize;
1883         if(size.flags & PBaseSize) {
1884                 c->basew = size.base_width;
1885                 c->baseh = size.base_height;
1886         }
1887         else if(size.flags & PMinSize) {
1888                 c->basew = size.min_width;
1889                 c->baseh = size.min_height;
1890         }
1891         else
1892                 c->basew = c->baseh = 0;
1893         if(size.flags & PResizeInc) {
1894                 c->incw = size.width_inc;
1895                 c->inch = size.height_inc;
1896         }
1897         else
1898                 c->incw = c->inch = 0;
1899         if(size.flags & PMaxSize) {
1900                 c->maxw = size.max_width;
1901                 c->maxh = size.max_height;
1902         }
1903         else
1904                 c->maxw = c->maxh = 0;
1905         if(size.flags & PMinSize) {
1906                 c->minw = size.min_width;
1907                 c->minh = size.min_height;
1908         }
1909         else if(size.flags & PBaseSize) {
1910                 c->minw = size.base_width;
1911                 c->minh = size.base_height;
1912         }
1913         else
1914                 c->minw = c->minh = 0;
1915         if(size.flags & PAspect) {
1916                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
1917                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
1918         }
1919         else
1920                 c->maxa = c->mina = 0.0;
1921         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1922                      && c->maxw == c->minw && c->maxh == c->minh);
1923 }
1924
1925 void
1926 updatetitle(Client *c) {
1927         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1928                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
1929         if(c->name[0] == '\0') /* hack to mark broken clients */
1930                 strcpy(c->name, broken);
1931 }
1932
1933 void
1934 updatestatus(void) {
1935         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
1936                 strcpy(stext, "dwm-"VERSION);
1937         drawbar(selmon);
1938 }
1939
1940 void
1941 updatewindowtype(Client *c) {
1942         Atom state = getatomprop(c, netatom[NetWMState]);
1943         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
1944
1945         if(state == netatom[NetWMFullscreen])
1946                 setfullscreen(c, true);
1947         if(wtype == netatom[NetWMWindowTypeDialog])
1948                 c->isfloating = true;
1949 }
1950
1951 void
1952 updatewmhints(Client *c) {
1953         XWMHints *wmh;
1954
1955         if((wmh = XGetWMHints(dpy, c->win))) {
1956                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
1957                         wmh->flags &= ~XUrgencyHint;
1958                         XSetWMHints(dpy, c->win, wmh);
1959                 }
1960                 else
1961                         c->isurgent = (wmh->flags & XUrgencyHint) ? true : false;
1962                 if(wmh->flags & InputHint)
1963                         c->neverfocus = !wmh->input;
1964                 else
1965                         c->neverfocus = false;
1966                 XFree(wmh);
1967         }
1968 }
1969
1970 void
1971 view(const Arg *arg) {
1972         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
1973                 return;
1974         selmon->seltags ^= 1; /* toggle sel tagset */
1975         if(arg->ui & TAGMASK)
1976                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
1977         focus(NULL);
1978         arrange(selmon);
1979 }
1980
1981 Client *
1982 wintoclient(Window w) {
1983         Client *c;
1984         Monitor *m;
1985
1986         for(m = mons; m; m = m->next)
1987                 for(c = m->clients; c; c = c->next)
1988                         if(c->win == w)
1989                                 return c;
1990         return NULL;
1991 }
1992
1993 Monitor *
1994 wintomon(Window w) {
1995         int x, y;
1996         Client *c;
1997         Monitor *m;
1998
1999         if(w == root && getrootptr(&x, &y))
2000                 return recttomon(x, y, 1, 1);
2001         for(m = mons; m; m = m->next)
2002                 if(w == m->barwin)
2003                         return m;
2004         if((c = wintoclient(w)))
2005                 return c->mon;
2006         return selmon;
2007 }
2008
2009 /* There's no way to check accesses to destroyed windows, thus those cases are
2010  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2011  * default error handler, which may call exit.  */
2012 int
2013 xerror(Display *dpy, XErrorEvent *ee) {
2014         if(ee->error_code == BadWindow
2015         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2016         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2017         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2018         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2019         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2020         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2021         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2022         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2023                 return 0;
2024         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2025                         ee->request_code, ee->error_code);
2026         return xerrorxlib(dpy, ee); /* may call exit */
2027 }
2028
2029 int
2030 xerrordummy(Display *dpy, XErrorEvent *ee) {
2031         return 0;
2032 }
2033
2034 /* Startup Error handler to check if another window manager
2035  * is already running. */
2036 int
2037 xerrorstart(Display *dpy, XErrorEvent *ee) {
2038         die("dwm: another window manager is already running\n");
2039         return -1;
2040 }
2041
2042 void
2043 zoom(const Arg *arg) {
2044         Client *c = selmon->sel;
2045
2046         if(!selmon->lt[selmon->sellt]->arrange
2047         || (selmon->sel && selmon->sel->isfloating))
2048                 return;
2049         if(c == nexttiled(selmon->clients))
2050                 if(!c || !(c = nexttiled(c->next)))
2051                         return;
2052         pop(c);
2053 }
2054
2055 int
2056 main(int argc, char *argv[]) {
2057         if(argc == 2 && !strcmp("-v", argv[1]))
2058                 die("dwm-"VERSION", © 2006-2015 dwm engineers, see LICENSE for details\n");
2059         else if(argc != 1)
2060                 die("usage: dwm [-v]\n");
2061         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2062                 fputs("warning: no locale support\n", stderr);
2063         if(!(dpy = XOpenDisplay(NULL)))
2064                 die("dwm: cannot open display\n");
2065         checkotherwm();
2066         setup();
2067         scan();
2068         run();
2069         cleanup();
2070         XCloseDisplay(dpy);
2071         return EXIT_SUCCESS;
2072 }