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 <stdarg.h>
  26 #include <signal.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/XF86keysym.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
  44 #include "drw.h"
  45 #include "util.h"
  46
  47 /* macros */
  48 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  49 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  50 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  51                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  52 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  53 #define LENGTH(X)               (sizeof X / sizeof X[0])
  54 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  55 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  56 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  57 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  58 #define TEXTW(X)                (drw_font_getexts_width(drw->font, X, strlen(X)) + drw->font->h)
  59
  60 /* enums */
  61 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  62 enum { SchemeNorm, SchemeSel, SchemeLast }; /* color schemes */
  63 enum { NetSupported, NetWMName, NetWMState,
  64        NetWMFullscreen, NetWMWindowOpacity, NetActiveWindow, NetWMWindowType,
  65        NetWMWindowTypeDialog, NetClientList, NetSupportingWMCheck, NetLast }; /* EWMH atoms */
  66 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  67 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  68        ClkClientWin, ClkRootWin, ClkAnywhere, ClkLast }; /* clicks */
  69
  70 typedef union {
  71         int i;
  72         unsigned int ui;
  73         float f;
  74         const void *v;
  75 } Arg;
  76
  77 typedef struct {
  78         unsigned int click;
  79         unsigned int mask;
  80         unsigned int button;
  81         void (*func)(const Arg *arg);
  82         const Arg arg;
  83 } Button;
  84
  85 typedef struct Monitor Monitor;
  86 typedef struct Client Client;
  87 struct Client {
  88         char name[256];
  89         float mina, maxa;
  90         int x, y, w, h;
  91         int oldx, oldy, oldw, oldh;
  92         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  93         int bw, oldbw;
  94         int opacity;
  95         unsigned int tags;
  96         Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, screen_hog;
  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         Bool screen_hog;
 143         int monitor;
 144 } Rule;
 145
 146 /* function declarations */
 147 static void applyrules(Client *c);
 148 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
 149 static void arrange(Monitor *m);
 150 static void arrangemon(Monitor *m);
 151 static void attach_as_master(Client *c);
 152 static void attach(Client *c);
 153 static void attachstack(Client *c);
 154 static void buttonpress(XEvent *e);
 155 static void checkotherwm(void);
 156 static void cleanup(void);
 157 static void cleanupmon(Monitor *mon);
 158 static void clearurgent(Client *c);
 159 static void clientmessage(XEvent *e);
 160 static void configure(Client *c);
 161 static void configurenotify(XEvent *e);
 162 static void configurerequest(XEvent *e);
 163 static Monitor *createmon(void);
 164 static void destroynotify(XEvent *e);
 165 static void detach(Client *c);
 166 static void detachstack(Client *c);
 167 static Monitor *dirtomon(int dir);
 168 static void drawbar(Monitor *m);
 169 static void drawbars(void);
 170 static void enternotify(XEvent *e);
 171 static void expose(XEvent *e);
 172 static void focus(Client *c);
 173 static void focusin(XEvent *e);
 174 static void focusmon(const Arg *arg);
 175 static void focusstack(const Arg *arg);
 176 static Bool getrootptr(int *x, int *y);
 177 static long getstate(Window w);
 178 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 179 static void grabbuttons(Client *c, Bool focused);
 180 static void grabkeys(void);
 181 static void incnmaster(const Arg *arg);
 182 static void keypress(XEvent *e);
 183 static void killclient(const Arg *arg);
 184 static void manage(Window w, XWindowAttributes *wa);
 185 static void mappingnotify(XEvent *e);
 186 static void maprequest(XEvent *e);
 187 static void monocle(Monitor *m);
 188 static void motionnotify(XEvent *e);
 189 static void movemouse(const Arg *arg);
 190 static Client *nexttiled(Client *c);
 191 static Client *snexttiled(Client *c);
 192 static Client *nextvisible(Client *c);
 193 static void pop(Client *);
 194 static void propertynotify(XEvent *e);
 195 static void quit(const Arg *arg);
 196 static Monitor *recttomon(int x, int y, int w, int h);
 197 static void resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base);
 198 static void resizeclient(Client *c, int x, int y, int w, int h, Client *base);
 199 static void resizemouse(const Arg *arg);
 200 static void restack(Monitor *m);
 201 static void run(void);
 202 static void scan(void);
 203 static Bool sendevent(Client *c, Atom proto);
 204 static void sendmon(Client *c, Monitor *m);
 205 static void setclientstate(Client *c, long state);
 206 static void setfocus(Client *c);
 207 static void setfullscreen(Client *c, Bool fullscreen);
 208 static void setlayout(const Arg *arg);
 209 static void setmfact(const Arg *arg);
 210 static void setup(void);
 211 static void showhide(Client *c);
 212 static void sigchld(int unused);
 213 static void kbspawn(const Arg *arg);
 214 static void spawn(const Arg *arg);
 215 static void tag(const Arg *arg);
 216 static void tagmon(const Arg *arg);
 217 static void jason_layout(Monitor *);
 218 static void tile(Monitor *);
 219 static void togglebar(const Arg *arg);
 220 static void togglefloating(const Arg *arg);
 221 static void toggletag(const Arg *arg);
 222 static void toggleview(const Arg *arg);
 223 static void unfocus(Client *c, Bool setfocus);
 224 static void unmanage(Client *c, Bool destroyed);
 225 static void unmapnotify(XEvent *e);
 226 static Bool updategeom(void);
 227 static void updatebarpos(Monitor *m);
 228 static void updatebars(void);
 229 static void updateclientlist(void);
 230 static void updatenumlockmask(void);
 231 static void updatesizehints(Client *c);
 232 static void updatestatus(void);
 233 static void updatewindowtype(Client *c);
 234 static void updatetitle(Client *c);
 235 static void updatewmhints(Client *c);
 236 static void view(const Arg *arg);
 237 static Client *wintoclient(Window w);
 238 static Monitor *wintomon(Window w);
 239 static int xerror(Display *dpy, XErrorEvent *ee);
 240 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 241 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 242 static void zoom(const Arg *arg);
 243
 244 // variables
 245 static Bool key_buffering = False;
 246 static const char broken[] = "broken";
 247 static char stext[256];
 248 static int screen;
 249 static int sw, sh;  // X display screen geometry width, height
 250 static int bh;      // bar height
 251 static int (*xerrorxlib)(Display *, XErrorEvent *);
 252 static unsigned int numlockmask = 0;
 253 static void (*handler[LASTEvent]) (XEvent *) = {
 254         [ButtonPress] = buttonpress,
 255         [ClientMessage] = clientmessage,
 256         [ConfigureRequest] = configurerequest,
 257         [ConfigureNotify] = configurenotify,
 258         [DestroyNotify] = destroynotify,
 259         [EnterNotify] = enternotify,
 260         [Expose] = expose,
 261         [FocusIn] = focusin,
 262         [KeyPress] = keypress,
 263         [MappingNotify] = mappingnotify,
 264         [MapRequest] = maprequest,
 265         [MotionNotify] = motionnotify,
 266         [PropertyNotify] = propertynotify,
 267         [UnmapNotify] = unmapnotify
 268 };
 269 static Atom wmatom[WMLast], netatom[NetLast];
 270 static Bool running = True;
 271 static Cur *cursor[CurLast];
 272 static ClrScheme scheme[SchemeLast];
 273 static Display *dpy;
 274 static Drw *drw;
 275 static Fnt *fnt;
 276 static Monitor *mons, *selmon;
 277 static Window root;
 278
 279 // unfocused windows get transparent (feature)
 280 static const unsigned long opacities[] = { 0, 0xbfffffff, 0x00000000 }; // first unused
 281 static void window_set_opaque(Client *c);
 282 static void window_set_translucent(Client *c);
 283 static void window_set_invisible(Client *c);
 284 static void window_set_opacity(Client *c, int opacity_index);
 285 static void update_window_opacities(Monitor *m);
 286 void
 287 window_set_opacity(Client *c, int opacity_index) {
 288         if (c->opacity == opacity_index) {
 289                 return;
 290         }
 291         c->opacity = opacity_index;
 292         if (opacity_index == 0) {
 293                 XDeleteProperty(dpy, c->win, netatom[NetWMWindowOpacity]);
 294         } else {
 295                 XChangeProperty(dpy, c->win, netatom[NetWMWindowOpacity], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)(&opacities[opacity_index]), 1);
 296         }
 297 }
 298 void
 299 window_set_opaque(Client *c) {
 300         window_set_opacity(c, 0);
 301 }
 302 void
 303 window_set_translucent(Client *c) {
 304         window_set_opacity(c, 1);
 305 }
 306 void
 307 window_set_invisible(Client *c) {
 308         window_set_opacity(c, 2);
 309 }
 310 void
 311 update_window_opacities(Monitor *m) {
 312         Client *master, *slave, *c;
 313         Bool selection_floating = False;
 314         slave = master = nexttiled(m->clients);
 315         if (master) slave = nexttiled(master->next);
 316         if (m->sel && m->sel != master) {
 317                 if (nexttiled(m->sel) == m->sel) // if selection is tiled
 318                         slave = m->sel;
 319                 else
 320                         selection_floating = True;
 321         }
 322         for (c = m->clients; c; c = c->next) {
 323                 if (ISVISIBLE(c)) {
 324                         if (c->isfloating || c == m->sel || (selection_floating && (c == master || c == slave))) {
 325                                 window_set_opaque(c);
 326                         } else if (c == master || c == slave) {
 327                                 window_set_translucent(c);
 328                         } else {
 329                                 window_set_opaque(c);
 330                         }
 331                 }
 332         }
 333 }
 334
 335
 336 /* configuration, allows nested code to access above variables */
 337 #include "config.h"
 338
 339 /* compile-time check if all tags fit into an unsigned int bit array. */
 340 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 341
 342 /* function implementations */
 343 void
 344 applyrules(Client *c) {
 345         const char *class, *instance;
 346         unsigned int i;
 347         const Rule *r;
 348         Monitor *m;
 349         XClassHint ch = { NULL, NULL };
 350
 351         /* rule matching */
 352         c->isfloating = c->tags = c->screen_hog = 0;
 353         XGetClassHint(dpy, c->win, &ch);
 354         class    = ch.res_class ? ch.res_class : broken;
 355         instance = ch.res_name  ? ch.res_name  : broken;
 356
 357         for(i = 0; i < LENGTH(rules); i++) {
 358                 r = &rules[i];
 359                 if((!r->title || c->name == strstr(c->name, r->title))
 360                 && (!r->class || strstr(class, r->class))
 361                 && (!r->instance || strstr(instance, r->instance)))
 362                 {
 363                         c->isfloating = r->isfloating;
 364                         if(r->isfloating) {
 365                                 c->x = -1; c->y = -2; // secret code for centered
 366                         }
 367                         c->tags |= r->tags;
 368                         c->screen_hog = r->screen_hog;
 369                         for(m = mons; m && m->num != r->monitor; m = m->next);
 370                         if(m)
 371                                 c->mon = m;
 372                 }
 373         }
 374         if(ch.res_class)
 375                 XFree(ch.res_class);
 376         if(ch.res_name)
 377                 XFree(ch.res_name);
 378         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 379 }
 380
 381 Bool
 382 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
 383         Bool baseismin;
 384         // Monitor *m = c->mon;
 385
 386         /* set minimum possible */
 387         *w = MAX(1, *w);
 388         *h = MAX(1, *h);
 389         if(interact) {
 390                 if(*x > sw)
 391                         *x = sw - WIDTH(c);
 392                 if(*y > sh)
 393                         *y = sh - HEIGHT(c);
 394                 if(*x + *w + 2 * c->bw < 0)
 395                         *x = 0;
 396                 if(*y + *h + 2 * c->bw < 0)
 397                         *y = 0;
 398         }
 399         // jason: let windows be offscreen
 400         //else {
 401         //      if(*x >= m->wx + m->ww)
 402         //              *x = m->wx + m->ww - WIDTH(c);
 403         //      if(*y >= m->wy + m->wh)
 404         //              *y = m->wy + m->wh - HEIGHT(c);
 405         //      if(*x + *w + 2 * c->bw <= m->wx)
 406         //              *x = m->wx;
 407         //      if(*y + *h + 2 * c->bw <= m->wy)
 408         //              *y = m->wy;
 409         //}
 410         if(*h < bh)
 411                 *h = bh;
 412         if(*w < bh)
 413                 *w = bh;
 414         if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 415                 /* see last two sentences in ICCCM 4.1.2.3 */
 416                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 417                 if(!baseismin) { /* temporarily remove base dimensions */
 418                         *w -= c->basew;
 419                         *h -= c->baseh;
 420                 }
 421                 /* adjust for aspect limits */
 422                 if(c->mina > 0 && c->maxa > 0) {
 423                         if(c->maxa < (float)*w / *h)
 424                                 *w = *h * c->maxa + 0.5;
 425                         else if(c->mina < (float)*h / *w)
 426                                 *h = *w * c->mina + 0.5;
 427                 }
 428                 if(baseismin) { /* increment calculation requires this */
 429                         *w -= c->basew;
 430                         *h -= c->baseh;
 431                 }
 432                 /* adjust for increment value */
 433                 if(c->incw)
 434                         *w -= *w % c->incw;
 435                 if(c->inch)
 436                         *h -= *h % c->inch;
 437                 /* restore base dimensions */
 438                 *w = MAX(*w + c->basew, c->minw);
 439                 *h = MAX(*h + c->baseh, c->minh);
 440                 if(c->maxw)
 441                         *w = MIN(*w, c->maxw);
 442                 if(c->maxh)
 443                         *h = MIN(*h, c->maxh);
 444         }
 445         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 446 }
 447
 448 void
 449 arrange(Monitor *m) {
 450         if(m)
 451                 showhide(m->stack);
 452         else for(m = mons; m; m = m->next)
 453                 showhide(m->stack);
 454         if(m) {
 455                 arrangemon(m);
 456                 restack(m);
 457         } else for(m = mons; m; m = m->next)
 458                 arrangemon(m);
 459 }
 460
 461 void
 462 arrangemon(Monitor *m) {
 463         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 464         if(m->lt[m->sellt]->arrange)
 465                 m->lt[m->sellt]->arrange(m);
 466 }
 467
 468 void
 469 attach_as_master(Client *c) {
 470         c->next = c->mon->clients;
 471         c->mon->clients = c;
 472 }
 473 void
 474 attach(Client *c) {
 475         if (c->mon->sel) {
 476                 c->next = c->mon->sel->next;
 477                 c->mon->sel->next = c;
 478         } else {
 479                 attach_as_master(c);
 480         }
 481 }
 482
 483 void
 484 attachstack(Client *c) {
 485         c->snext = c->mon->stack;
 486         c->mon->stack = c;
 487 }
 488
 489 void
 490 buttonpress(XEvent *e) {
 491         unsigned int i, click;
 492         Arg arg = {0};
 493         Client *c;
 494         Monitor *m;
 495         XButtonPressedEvent *ev = &e->xbutton;
 496         Bool called = False;
 497
 498         for(i = 0; i < LENGTH(buttons); i++) {
 499                 if(buttons[i].click == ClkAnywhere && buttons[i].button == ev->button
 500                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state)) {
 501                         buttons[i].func(&buttons[i].arg);
 502                         called = True;
 503                 }
 504         }
 505         if (called) {
 506                 return;
 507         }
 508
 509         click = ClkRootWin;
 510         /* focus monitor if necessary */
 511         if((m = wintomon(ev->window)) && m != selmon) {
 512                 unfocus(selmon->sel, True);
 513                 selmon = m;
 514                 focus(NULL);
 515         }
 516         if(ev->window == selmon->barwin) {
 517                 return;
 518         } else if((c = wintoclient(ev->window))) {
 519                 focus(c);
 520                 click = ClkClientWin;
 521         }
 522         for(i = 0; i < LENGTH(buttons); i++) {
 523                 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 524                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state)) {
 525                         if (click == ClkTagBar && buttons[i].arg.i == 0) {
 526                                 buttons[i].func(&arg);
 527                         } else {
 528                                 buttons[i].func(&buttons[i].arg);
 529                         }
 530                 }
 531         }
 532 }
 533
 534 void
 535 checkotherwm(void) {
 536         xerrorxlib = XSetErrorHandler(xerrorstart);
 537         /* this causes an error if some other window manager is running */
 538         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 539         XSync(dpy, False);
 540         XSetErrorHandler(xerror);
 541         XSync(dpy, False);
 542 }
 543
 544 void
 545 cleanup(void) {
 546         Arg a = {.ui = ~0};
 547         Layout foo = { "", NULL };
 548         Monitor *m;
 549
 550         view(&a);
 551         selmon->lt[selmon->sellt] = &foo;
 552         for(m = mons; m; m = m->next)
 553                 while(m->stack)
 554                         unmanage(m->stack, False);
 555         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 556         while(mons)
 557                 cleanupmon(mons);
 558         drw_cur_free(drw, cursor[CurNormal]);
 559         drw_cur_free(drw, cursor[CurResize]);
 560         drw_cur_free(drw, cursor[CurMove]);
 561         drw_font_free(dpy, fnt);
 562         drw_clr_free(scheme[SchemeNorm].border);
 563         drw_clr_free(scheme[SchemeNorm].bg);
 564         drw_clr_free(scheme[SchemeNorm].fg);
 565         drw_clr_free(scheme[SchemeSel].border);
 566         drw_clr_free(scheme[SchemeSel].bg);
 567         drw_clr_free(scheme[SchemeSel].fg);
 568         drw_free(drw);
 569         XSync(dpy, False);
 570         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 571         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 572 }
 573
 574 void
 575 cleanupmon(Monitor *mon) {
 576         Monitor *m;
 577
 578         if(mon == mons)
 579                 mons = mons->next;
 580         else {
 581                 for(m = mons; m && m->next != mon; m = m->next);
 582                 m->next = mon->next;
 583         }
 584         XUnmapWindow(dpy, mon->barwin);
 585         XDestroyWindow(dpy, mon->barwin);
 586         free(mon);
 587 }
 588
 589 void
 590 clearurgent(Client *c) {
 591         XWMHints *wmh;
 592
 593         c->isurgent = False;
 594         if(!(wmh = XGetWMHints(dpy, c->win)))
 595                 return;
 596         wmh->flags &= ~XUrgencyHint;
 597         XSetWMHints(dpy, c->win, wmh);
 598         XFree(wmh);
 599 }
 600
 601 void
 602 clientmessage(XEvent *e) {
 603         XClientMessageEvent *cme = &e->xclient;
 604         Client *c = wintoclient(cme->window);
 605
 606         if(!c)
 607                 return;
 608         if(cme->message_type == netatom[NetWMState]) {
 609                 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 610                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 611                                       || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 612         }
 613         else if(cme->message_type == netatom[NetActiveWindow]) {
 614                 // Jason added this so apps can't steal focus:
 615                 return;
 616                 if(!ISVISIBLE(c)) {
 617                         c->mon->seltags ^= 1;
 618                         c->mon->tagset[c->mon->seltags] = c->tags;
 619                 }
 620                 pop(c);
 621         }
 622 }
 623
 624 void
 625 configure(Client *c) {
 626         XConfigureEvent ce;
 627
 628         ce.type = ConfigureNotify;
 629         ce.display = dpy;
 630         ce.event = c->win;
 631         ce.window = c->win;
 632         ce.x = c->x;
 633         ce.y = c->y;
 634         ce.width = c->w;
 635         ce.height = c->h;
 636         ce.border_width = c->bw;
 637         ce.above = None;
 638         ce.override_redirect = False;
 639         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 640 }
 641
 642 void
 643 configurenotify(XEvent *e) {
 644         Monitor *m;
 645         XConfigureEvent *ev = &e->xconfigure;
 646         Bool dirty;
 647
 648         // TODO: updategeom handling sucks, needs to be simplified
 649         if(ev->window == root) {
 650                 dirty = (sw != ev->width || sh != ev->height);
 651                 sw = ev->width;
 652                 sh = ev->height;
 653                 if(updategeom() || dirty) {
 654                         drw_resize(drw, sw, bh);
 655                         updatebars();
 656                         for(m = mons; m; m = m->next)
 657                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww * m->mfact, bh);
 658                         focus(NULL);
 659                         arrange(NULL);
 660                 }
 661         }
 662 }
 663
 664 void
 665 configurerequest(XEvent *e) {
 666         Client *c;
 667         Monitor *m;
 668         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 669         XWindowChanges wc;
 670
 671         if((c = wintoclient(ev->window))) {
 672                 if(ev->value_mask & CWBorderWidth)
 673                         c->bw = ev->border_width;
 674                 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 675                         m = c->mon;
 676                         if(ev->value_mask & CWX) {
 677                                 c->oldx = c->x;
 678                                 c->x = m->mx + ev->x;
 679                         }
 680                         if(ev->value_mask & CWY) {
 681                                 c->oldy = c->y;
 682                                 c->y = m->my + ev->y;
 683                         }
 684                         if(ev->value_mask & CWWidth) {
 685                                 c->oldw = c->w;
 686                                 c->w = ev->width;
 687                         }
 688                         if(ev->value_mask & CWHeight) {
 689                                 c->oldh = c->h;
 690                                 c->h = ev->height;
 691                         }
 692                         if((c->x + c->w) > m->mx + m->mw && c->isfloating)
 693                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 694                         if((c->y + c->h) > m->my + m->mh && c->isfloating)
 695                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 696                         if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 697                                 configure(c);
 698                         if(ISVISIBLE(c))
 699                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 700                 }
 701                 else
 702                         configure(c);
 703         }
 704         else {
 705                 wc.x = ev->x;
 706                 wc.y = ev->y;
 707                 wc.width = ev->width;
 708                 wc.height = ev->height;
 709                 wc.border_width = ev->border_width;
 710                 wc.sibling = ev->above;
 711                 wc.stack_mode = ev->detail;
 712                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 713         }
 714         XSync(dpy, False);
 715 }
 716
 717 Monitor *
 718 createmon(void) {
 719         Monitor *m;
 720
 721         if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
 722                 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
 723         m->tagset[0] = m->tagset[1] = 1;
 724         m->mfact = mfact;
 725         m->nmaster = nmaster;
 726         m->showbar = showbar;
 727         m->topbar = topbar;
 728         m->lt[0] = &layouts[0];
 729         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 730         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 731         return m;
 732 }
 733
 734 void
 735 destroynotify(XEvent *e) {
 736         Client *c;
 737         XDestroyWindowEvent *ev = &e->xdestroywindow;
 738
 739         if((c = wintoclient(ev->window)))
 740                 unmanage(c, True);
 741 }
 742
 743 void
 744 detach(Client *c) {
 745         Client **tc;
 746
 747         for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 748         *tc = c->next;
 749 }
 750
 751 // NOTE: the stack is for z-order and most-recently-focused
 752 // only mon->clients determines position in visible layout
 753 void
 754 detachstack(Client *c) {
 755         Client *prev = NULL, *next_sel = NULL, *i;
 756         for(i = c->mon->stack; i && i != c; i = i->snext) {
 757                 prev = i;
 758         }
 759         if(c == c->mon->sel) {
 760                 // find last visible window before c
 761                 // WARNING if you detach() before detachstack() this will select last visible window
 762                 for(i = nextvisible(c->mon->clients); i && i != c; i = nextvisible(i->next))
 763                         next_sel = i;
 764                 // failing that, find first visible window (besides c)
 765                 if (!next_sel) {
 766                         for(i = nextvisible(c->mon->clients); i && i == c; i = nextvisible(i->next));
 767                         if (i != c)
 768                                 next_sel = i;
 769                 }
 770                 c->mon->sel = next_sel;
 771         }
 772         if (prev) {
 773                 prev->snext = c->snext;
 774         } else {
 775                 c->mon->stack = c->snext;
 776         }
 777 }
 778
 779 Monitor *
 780 dirtomon(int dir) {
 781         Monitor *m = NULL;
 782
 783         if(dir > 0) {
 784                 if(!(m = selmon->next))
 785                         m = mons;
 786         }
 787         else if(selmon == mons)
 788                 for(m = mons; m->next; m = m->next);
 789         else
 790                 for(m = mons; m->next != selmon; m = m->next);
 791         return m;
 792 }
 793
 794 void
 795 drawbar(Monitor *m) {
 796         int x, xx, w;
 797         unsigned int i, occ = 0, urg = 0;
 798         Client *c;
 799
 800         for(c = m->clients; c; c = c->next) {
 801                 occ |= c->tags;
 802                 if(c->isurgent)
 803                         urg |= c->tags;
 804         }
 805         x = 0;
 806         for(i = 0; i < LENGTH(tags); i++) {
 807                 w = TEXTW(tags[i]);
 808                 drw_setscheme(drw, m->tagset[m->seltags] & 1 << i ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 809                 drw_text(drw, x, 0, w, bh, tags[i], urg & 1 << i);
 810                 drw_rect(drw, x, 0, w, bh, m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 811                            occ & 1 << i, urg & 1 << i);
 812                 x += w;
 813         }
 814         xx = x;
 815         if(m == selmon) { /* status is only drawn on selected monitor */
 816                 w = TEXTW(stext);
 817                 x = m->ww * m->mfact - w;
 818                 if(x < xx) {
 819                         x = xx;
 820                         w = m->ww* m->mfact  - xx;
 821                 }
 822                 drw_text(drw, x, 0, w, bh, stext, 0);
 823         }
 824         else
 825                 x = m->ww;
 826         if((w = x - xx) > bh) {
 827                 x = xx;
 828                 if(m->sel) {
 829                         drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 830                         drw_text(drw, x, 0, w, bh, m->sel->name, 0);
 831                         drw_rect(drw, x, 0, w, bh, m->sel->isfixed, m->sel->isfloating, 0);
 832                 } else {
 833                         drw_setscheme(drw, &scheme[SchemeNorm]);
 834                         drw_text(drw, x, 0, w, bh, NULL, 0);
 835                 }
 836         }
 837         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 838 }
 839
 840 void
 841 drawbars(void) {
 842         Monitor *m;
 843
 844         for(m = mons; m; m = m->next)
 845                 drawbar(m);
 846 }
 847
 848 void
 849 enternotify(XEvent *e) {
 850         Client *c;
 851         Monitor *m;
 852         XCrossingEvent *ev = &e->xcrossing;
 853
 854         return; // jason: added to stop mouse focus
 855
 856         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 857                 return;
 858         c = wintoclient(ev->window);
 859         m = c ? c->mon : wintomon(ev->window);
 860         if(m != selmon) {
 861                 unfocus(selmon->sel, True);
 862                 selmon = m;
 863         }
 864         else if(!c || c == selmon->sel)
 865                 return;
 866         focus(c);
 867 }
 868
 869 void
 870 expose(XEvent *e) {
 871         Monitor *m;
 872         XExposeEvent *ev = &e->xexpose;
 873
 874         if(ev->count == 0 && (m = wintomon(ev->window)))
 875                 drawbar(m);
 876 }
 877
 878 void
 879 focus(Client *c) {
 880         if(!c || !ISVISIBLE(c))
 881                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 882         /* was if(selmon->sel) */
 883         if(selmon->sel && selmon->sel != c)
 884                 unfocus(selmon->sel, False);
 885         if(c) {
 886                 if(c->mon != selmon)
 887                         selmon = c->mon;
 888                 if(c->isurgent)
 889                         clearurgent(c);
 890                 detachstack(c);
 891                 attachstack(c);
 892                 grabbuttons(c, True);
 893                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->rgb);
 894                 setfocus(c);
 895         }
 896         else {
 897                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 898                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 899         }
 900         selmon->sel = c;
 901         arrange(selmon);
 902         update_window_opacities(selmon);
 903         drawbars();
 904         if(c && (!root || (c->win!=root)) )
 905                 window_set_opaque(c);
 906 }
 907
 908 void
 909 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 910         XFocusChangeEvent *ev = &e->xfocus;
 911
 912         if(selmon->sel && ev->window != selmon->sel->win)
 913                 setfocus(selmon->sel);
 914 }
 915
 916 void
 917 focusmon(const Arg *arg) {
 918         Monitor *m;
 919
 920         if(!mons->next)
 921                 return;
 922         if((m = dirtomon(arg->i)) == selmon)
 923                 return;
 924         unfocus(selmon->sel, False); /* s/True/False/ fixes input focus issues
 925                                         in gedit and anjuta */
 926         selmon = m;
 927         focus(NULL);
 928 }
 929
 930 void
 931 focusstack(const Arg *arg) {
 932         Client *c = NULL, *i;
 933
 934         if(!selmon->sel)
 935                 return;
 936         if(arg->i == 0) {
 937                 for(i = selmon->clients; i != selmon->sel; i = i->next) {
 938                         if(ISVISIBLE(i)) {
 939                                 c = i;
 940                                 break;
 941                         }
 942                 }
 943         } else if(arg->i > 0) {
 944                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 945                 if(!c)
 946                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 947         }
 948         else {
 949                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 950                         if(ISVISIBLE(i))
 951                                 c = i;
 952                 if(!c)
 953                         for(; i; i = i->next)
 954                                 if(ISVISIBLE(i))
 955                                         c = i;
 956         }
 957         if(c) {
 958                 focus(c);
 959                 restack(selmon);
 960         }
 961 }
 962
 963 Atom
 964 getatomprop(Client *c, Atom prop) {
 965         int di;
 966         unsigned long dl;
 967         unsigned char *p = NULL;
 968         Atom da, atom = None;
 969
 970         if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 971                               &da, &di, &dl, &dl, &p) == Success && p) {
 972                 atom = *(Atom *)p;
 973                 XFree(p);
 974         }
 975         return atom;
 976 }
 977
 978 Bool
 979 getrootptr(int *x, int *y) {
 980         int di;
 981         unsigned int dui;
 982         Window dummy;
 983
 984         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 985 }
 986
 987 long
 988 getstate(Window w) {
 989         int format;
 990         long result = -1;
 991         unsigned char *p = NULL;
 992         unsigned long n, extra;
 993         Atom real;
 994
 995         if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 996                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 997                 return -1;
 998         if(n != 0)
 999                 result = *p;
1000         XFree(p);
1001         return result;
1002 }
1003
1004 Bool
1005 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
1006         char **list = NULL;
1007         int n;
1008         XTextProperty name;
1009
1010         if(!text || size == 0)
1011                 return False;
1012         text[0] = '\0';
1013         XGetTextProperty(dpy, w, &name, atom);
1014         if(!name.nitems)
1015                 return False;
1016         if(name.encoding == XA_STRING)
1017                 strncpy(text, (char *)name.value, size - 1);
1018         else {
1019                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1020                         strncpy(text, *list, size - 1);
1021                         XFreeStringList(list);
1022                 }
1023         }
1024         text[size - 1] = '\0';
1025         XFree(name.value);
1026         return True;
1027 }
1028
1029 void
1030 grabbuttons(Client *c, Bool focused) {
1031         updatenumlockmask();
1032         {
1033                 unsigned int i, j;
1034                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1035                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1036                 if(focused) {
1037                         for(i = 0; i < LENGTH(buttons); i++)
1038                                 if(buttons[i].click == ClkClientWin || buttons[i].click == ClkAnywhere)
1039                                         for(j = 0; j < LENGTH(modifiers); j++)
1040                                                 XGrabButton(dpy, buttons[i].button,
1041                                                             buttons[i].mask | modifiers[j],
1042                                                             c->win, False, BUTTONMASK,
1043                                                             GrabModeAsync, GrabModeSync, None, None);
1044                 } else {
1045                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1046                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1047                 }
1048         }
1049 }
1050
1051 void
1052 grabkeys(void) {
1053         updatenumlockmask();
1054         //XUngrabKey(dpy, AnyKey, AnyModifier, root);
1055         {
1056                 unsigned int i, j;
1057                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1058                 KeyCode code;
1059
1060                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1061                 for(i = 0; i < LENGTH(keys); i++)
1062                         if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1063                                 for(j = 0; j < LENGTH(modifiers); j++)
1064                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1065                                                  True, GrabModeAsync,
1066                                                  keys[i].func == kbspawn ? GrabModeSync : GrabModeAsync);
1067         }
1068 }
1069
1070 void
1071 incnmaster(const Arg *arg) {
1072         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1073         arrange(selmon);
1074 }
1075
1076 #ifdef XINERAMA
1077 static Bool
1078 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1079         while(n--)
1080                 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1081                 && unique[n].width == info->width && unique[n].height == info->height)
1082                         return False;
1083         return True;
1084 }
1085 #endif /* XINERAMA */
1086
1087 void
1088 keypress(XEvent *e) {
1089         unsigned int i;
1090         KeySym keysym;
1091         XKeyEvent *ev;
1092
1093         ev = &e->xkey;
1094         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1095         for(i = 0; i < LENGTH(keys); i++) {
1096                 if(keysym == keys[i].keysym
1097                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1098                 && keys[i].func) {
1099                         keys[i].func(&(keys[i].arg));
1100                 }
1101         }
1102 }
1103
1104 void
1105 killclient(const Arg *arg) {
1106         if(!selmon->sel)
1107                 return;
1108         if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1109                 XGrabServer(dpy);
1110                 XSetErrorHandler(xerrordummy);
1111                 XSetCloseDownMode(dpy, DestroyAll);
1112                 XKillClient(dpy, selmon->sel->win);
1113                 XSync(dpy, False);
1114                 XSetErrorHandler(xerror);
1115                 XUngrabServer(dpy);
1116         }
1117 }
1118
1119 void
1120 manage(Window w, XWindowAttributes *wa) {
1121         Client *c, *t = NULL;
1122         Window trans = None;
1123         XWindowChanges wc;
1124
1125         if(!(c = calloc(1, sizeof(Client))))
1126                 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1127         c->opacity = -1; // who knows
1128         c->win = w;
1129         updatetitle(c);
1130         if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1131                 c->mon = t->mon;
1132                 c->tags = t->tags;
1133         }
1134         else {
1135                 c->mon = selmon;
1136                 applyrules(c);
1137         }
1138         /* geometry */
1139         if(c->x == -1 && c->y == -2) { // secret code for centered
1140                 c->x = c->oldx = (c->mon->ww - wa->width) / 2;
1141                 c->y = c->oldy = (c->mon->wh - wa->height) / 2;
1142         } else {
1143                 c->x = c->oldx = wa->x;
1144                 c->y = c->oldy = wa->y;
1145         }
1146         c->w = c->oldw = wa->width;
1147         c->h = c->oldh = wa->height;
1148         c->oldbw = wa->border_width;
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].border->rgb);
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, False);
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, False);
1181         c->mon->sel = c;
1182         arrange(c->mon);
1183         XMapWindow(dpy, c->win);
1184         focus(c);
1185         if(key_buffering) {
1186                 key_buffering = False;
1187                 XAllowEvents(dpy, AsyncKeyboard, CurrentTime);
1188         }
1189 }
1190
1191 void
1192 mappingnotify(XEvent *e) {
1193         XMappingEvent *ev = &e->xmapping;
1194         // fprintf(stderr, "MapNotify\n");
1195
1196         XRefreshKeyboardMapping(ev);
1197         if(ev->request == MappingKeyboard)
1198                 grabkeys();
1199 }
1200
1201 void
1202 maprequest(XEvent *e) {
1203         static XWindowAttributes wa;
1204         XMapRequestEvent *ev = &e->xmaprequest;
1205
1206         // fprintf(stderr, "MapRequest\n");
1207         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1208                 return;
1209         if(wa.override_redirect) {
1210                 return;
1211         }
1212         if(!wintoclient(ev->window))
1213                 manage(ev->window, &wa);
1214 }
1215
1216 void
1217 monocle(Monitor *m) {
1218         unsigned int n = 0;
1219         Client *c;
1220
1221         for(c = m->clients; c; c = c->next)
1222                 if(ISVISIBLE(c))
1223                         n++;
1224         if(n > 0) /* override layout symbol */
1225                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1226         for(c = snexttiled(m->stack); c; c = snexttiled(c->snext)) {
1227                 if (c == m->sel) {
1228                         resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False, 0);
1229                 } else {
1230                         // this window is should not be visible. move off top, but don't change h/w
1231                         resize(c, m->wx, m->wy - 4000, c->w, c->h, False, 0);
1232                 }
1233         }
1234 }
1235
1236 void
1237 motionnotify(XEvent *e) {
1238         static Monitor *mon = NULL;
1239         Monitor *m;
1240         XMotionEvent *ev = &e->xmotion;
1241
1242         if(ev->window != root)
1243                 return;
1244         if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1245                 unfocus(selmon->sel, True);
1246                 selmon = m;
1247                 focus(NULL);
1248         }
1249         mon = m;
1250 }
1251
1252 void
1253 movemouse(const Arg *arg) {
1254         int x, y, ocx, ocy, nx, ny;
1255         Client *c;
1256         Monitor *m;
1257         XEvent ev;
1258         Time lasttime = 0;
1259
1260         if(!(c = selmon->sel))
1261                 return;
1262         if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1263                 return;
1264         restack(selmon);
1265         ocx = c->x;
1266         ocy = c->y;
1267         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1268         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1269                 return;
1270         if(!getrootptr(&x, &y))
1271                 return;
1272         do {
1273                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1274                 switch(ev.type) {
1275                 case ConfigureRequest:
1276                 case Expose:
1277                 case MapRequest:
1278                         handler[ev.type](&ev);
1279                         break;
1280                 case MotionNotify:
1281                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1282                                 continue;
1283                         lasttime = ev.xmotion.time;
1284
1285                         nx = ocx + (ev.xmotion.x - x);
1286                         ny = ocy + (ev.xmotion.y - y);
1287                         if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1288                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1289                                 if(abs(selmon->wx - nx) < snap)
1290                                         nx = selmon->wx;
1291                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1292                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1293                                 if(abs(selmon->wy - ny) < snap)
1294                                         ny = selmon->wy;
1295                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1296                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1297                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1298                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1299                                         togglefloating(NULL);
1300                         }
1301                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1302                                 resize(c, nx, ny, c->w, c->h, True, 0);
1303                         break;
1304                 }
1305         } while(ev.type != ButtonRelease);
1306         XUngrabPointer(dpy, CurrentTime);
1307         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1308                 sendmon(c, m);
1309                 selmon = m;
1310                 focus(NULL);
1311         }
1312 }
1313
1314 Client *
1315 nexttiled(Client *c) {
1316         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1317         return c;
1318 }
1319
1320 Client *
1321 snexttiled(Client *c) {
1322         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->snext);
1323         return c;
1324 }
1325
1326 Client *
1327 nextvisible(Client *c) {
1328         for(; c && !ISVISIBLE(c); c = c->next);
1329         return c;
1330 }
1331
1332 void
1333 pop(Client *c) {
1334         detach(c);
1335         attach_as_master(c);
1336         focus(c);
1337         arrange(c->mon);
1338 }
1339
1340 void
1341 propertynotify(XEvent *e) {
1342         Client *c;
1343         Window trans;
1344         XPropertyEvent *ev = &e->xproperty;
1345
1346         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1347                 updatestatus();
1348         else if(ev->state == PropertyDelete)
1349                 return; /* ignore */
1350         else if((c = wintoclient(ev->window))) {
1351                 switch(ev->atom) {
1352                 default: break;
1353                 case XA_WM_TRANSIENT_FOR:
1354                         if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1355                            (c->isfloating = (wintoclient(trans)) != NULL))
1356                                 arrange(c->mon);
1357                         break;
1358                 case XA_WM_NORMAL_HINTS:
1359                         updatesizehints(c);
1360                         break;
1361                 case XA_WM_HINTS:
1362                         updatewmhints(c);
1363                         drawbars();
1364                         break;
1365                 }
1366                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1367                         updatetitle(c);
1368                         if(c == c->mon->sel)
1369                                 drawbar(c->mon);
1370                 }
1371                 if(ev->atom == netatom[NetWMWindowType])
1372                         updatewindowtype(c);
1373         }
1374 }
1375
1376 void
1377 quit(const Arg *arg) {
1378         running = False;
1379 }
1380
1381 Monitor *
1382 recttomon(int x, int y, int w, int h) {
1383         Monitor *m, *r = selmon;
1384         int a, area = 0;
1385
1386         for(m = mons; m; m = m->next)
1387                 if((a = INTERSECT(x, y, w, h, m)) > area) {
1388                         area = a;
1389                         r = m;
1390                 }
1391         return r;
1392 }
1393
1394 void
1395 resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base) {
1396         if(applysizehints(c, &x, &y, &w, &h, interact))
1397                 resizeclient(c, x, y, w, h, base);
1398 }
1399
1400 void
1401 resizeclient(Client *c, int x, int y, int w, int h, Client *base) {
1402         XWindowChanges wc;
1403         unsigned long mask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
1404
1405         c->oldx = c->x; c->x = wc.x = x;
1406         c->oldy = c->y; c->y = wc.y = y;
1407         c->oldw = c->w; c->w = wc.width = w;
1408         c->oldh = c->h; c->h = wc.height = h;
1409         // base = 0;
1410         if (base) {
1411                 wc.stack_mode = Above;
1412                 wc.sibling = base->win;
1413                 mask |= CWStackMode|CWSibling;
1414         }
1415         wc.border_width = c->bw;
1416         XConfigureWindow(dpy, c->win, mask, &wc);
1417         configure(c);
1418         XSync(dpy, False);
1419 }
1420
1421 void
1422 resizemouse(const Arg *arg) {
1423         int ocx, ocy, nw, nh;
1424         Client *c;
1425         Monitor *m;
1426         XEvent ev;
1427         Time lasttime = 0;
1428
1429         if(!(c = selmon->sel))
1430                 return;
1431         if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1432                 return;
1433         restack(selmon);
1434         ocx = c->x;
1435         ocy = c->y;
1436         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1437                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1438                 return;
1439         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1440         do {
1441                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1442                 switch(ev.type) {
1443                 case ConfigureRequest:
1444                 case Expose:
1445                 case MapRequest:
1446                         handler[ev.type](&ev);
1447                         break;
1448                 case MotionNotify:
1449                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1450                                 continue;
1451                         lasttime = ev.xmotion.time;
1452
1453                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1454                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1455                         if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1456                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1457                         {
1458                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1459                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1460                                         togglefloating(NULL);
1461                         }
1462                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1463                                 resize(c, c->x, c->y, nw, nh, True, 0);
1464                         break;
1465                 }
1466         } while(ev.type != ButtonRelease);
1467         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1468         XUngrabPointer(dpy, CurrentTime);
1469         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1470         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1471                 sendmon(c, m);
1472                 selmon = m;
1473                 focus(NULL);
1474         }
1475 }
1476
1477 void
1478 restack(Monitor *m) {
1479         Client *c;
1480         XEvent ev;
1481         XWindowChanges wc;
1482
1483         drawbar(m);
1484         if(!m->sel)
1485                 return;
1486         if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1487                 XRaiseWindow(dpy, m->sel->win);
1488         if(m->lt[m->sellt]->arrange) {
1489                 wc.stack_mode = Below;
1490                 wc.sibling = m->barwin;
1491                 for(c = m->clients; c; c = c->next)
1492                         if(!c->isfloating && ISVISIBLE(c)) {
1493                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1494                                 wc.sibling = c->win;
1495                                 wc.stack_mode = Above;
1496                         }
1497         }
1498         XSync(dpy, False);
1499         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1500 }
1501
1502 void
1503 run(void) {
1504         XEvent ev;
1505         /* main event loop */
1506         XSync(dpy, False);
1507         while(running && !XNextEvent(dpy, &ev)) {
1508                 if(handler[ev.type]) {
1509                         // fprintf(stderr, "handling event type %i\n", ev.type);
1510                         handler[ev.type](&ev); /* call handler */
1511                 } else {
1512                         // fprintf(stderr, "evt type %i\n", ev.type);
1513                 }
1514         }
1515 }
1516
1517 void
1518 scan(void) {
1519         unsigned int i, num;
1520         Window d1, d2, *wins = NULL;
1521         XWindowAttributes wa;
1522
1523         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1524                 for(i = 0; i < num; i++) {
1525                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1526                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1527                                 continue;
1528                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1529                                 manage(wins[i], &wa);
1530                 }
1531                 for(i = 0; i < num; i++) { /* now the transients */
1532                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1533                                 continue;
1534                         if(XGetTransientForHint(dpy, wins[i], &d1)
1535                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1536                                 manage(wins[i], &wa);
1537                 }
1538                 if(wins)
1539                         XFree(wins);
1540         }
1541 }
1542
1543 void
1544 sendmon(Client *c, Monitor *m) {
1545         if(c->mon == m)
1546                 return;
1547         unfocus(c, True);
1548         detachstack(c);
1549         detach(c);
1550         c->mon = m;
1551         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1552         attach(c);
1553         attachstack(c);
1554         focus(NULL);
1555         arrange(NULL);
1556 }
1557
1558 void
1559 setclientstate(Client *c, long state) {
1560         long data[] = { state, None };
1561
1562         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1563                         PropModeReplace, (unsigned char *)data, 2);
1564 }
1565
1566 Bool
1567 sendevent(Client *c, Atom proto) {
1568         int n;
1569         Atom *protocols;
1570         Bool exists = False;
1571         XEvent ev;
1572
1573         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1574                 while(!exists && n--)
1575                         exists = protocols[n] == proto;
1576                 XFree(protocols);
1577         }
1578         if(exists) {
1579                 ev.type = ClientMessage;
1580                 ev.xclient.window = c->win;
1581                 ev.xclient.message_type = wmatom[WMProtocols];
1582                 ev.xclient.format = 32;
1583                 ev.xclient.data.l[0] = proto;
1584                 ev.xclient.data.l[1] = CurrentTime;
1585                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1586         }
1587         return exists;
1588 }
1589
1590 void
1591 setfocus(Client *c) {
1592         if(!c->neverfocus) {
1593                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1594                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1595                                 XA_WINDOW, 32, PropModeReplace,
1596                                 (unsigned char *) &(c->win), 1);
1597         }
1598         sendevent(c, wmatom[WMTakeFocus]);
1599 }
1600
1601 void
1602 setfullscreen(Client *c, Bool fullscreen) {
1603         if(fullscreen) {
1604                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1605                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1606                 c->isfullscreen = True;
1607                 c->oldstate = c->isfloating;
1608                 c->oldbw = c->bw;
1609                 c->bw = 0;
1610                 c->isfloating = True;
1611                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh, 0);
1612                 XRaiseWindow(dpy, c->win);
1613         }
1614         else {
1615                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1616                                 PropModeReplace, (unsigned char*)0, 0);
1617                 c->isfullscreen = False;
1618                 c->isfloating = c->oldstate;
1619                 c->bw = c->oldbw;
1620                 c->x = c->oldx;
1621                 c->y = c->oldy;
1622                 c->w = c->oldw;
1623                 c->h = c->oldh;
1624                 resizeclient(c, c->x, c->y, c->w, c->h, 0);
1625                 arrange(c->mon);
1626         }
1627 }
1628
1629 void
1630 setlayout(const Arg *arg) {
1631         if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1632                 selmon->sellt ^= 1;
1633         if(arg && arg->v)
1634                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1635         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1636         if(selmon->sel)
1637                 arrange(selmon);
1638         else
1639                 drawbar(selmon);
1640 }
1641
1642 /* arg > 1.0 will set mfact absolutly */
1643 void
1644 setmfact(const Arg *arg) {
1645         float f;
1646
1647         if(!arg || !selmon->lt[selmon->sellt]->arrange)
1648                 return;
1649         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1650         if(f < 0.1 || f > 0.9)
1651                 return;
1652         selmon->mfact = f;
1653         arrange(selmon);
1654 }
1655
1656 void
1657 setup(void) {
1658         XSetWindowAttributes wa;
1659
1660         /* clean up any zombies immediately */
1661         sigchld(0);
1662
1663         /* init screen */
1664         screen = DefaultScreen(dpy);
1665         root = RootWindow(dpy, screen);
1666         fnt = drw_font_create(dpy, font);
1667         sw = DisplayWidth(dpy, screen);
1668         sh = DisplayHeight(dpy, screen);
1669         bh = fnt->h + 2;
1670         drw = drw_create(dpy, screen, root, sw, sh);
1671         drw_setfont(drw, fnt);
1672         updategeom();
1673         /* init atoms */
1674         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1675         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1676         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1677         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1678         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1679         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1680         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1681         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1682         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1683         netatom[NetWMWindowOpacity] = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
1684         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1685         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1686         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1687         netatom[NetSupportingWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1688         XInternAtom(dpy, "_MOTIF_WM_HINTS", False); /* clients may request borderless/fullscreen */
1689         /* init cursors */
1690         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1691         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1692         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1693         /* init appearance */
1694         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1695         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1696         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1697         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1698         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1699         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1700         /* init bars */
1701         updatebars();
1702         updatestatus();
1703         /* EWMH support per view */
1704         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1705                         PropModeReplace, (unsigned char *) netatom, NetLast);
1706         XDeleteProperty(dpy, root, netatom[NetClientList]);
1707         /* select for events */
1708         wa.cursor = cursor[CurNormal]->cursor;
1709         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1710                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1711         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1712         XSelectInput(dpy, root, wa.event_mask);
1713         grabkeys();
1714         focus(NULL);
1715 }
1716
1717 void
1718 showhide(Client *c) {
1719         if(!c)
1720                 return;
1721         if(ISVISIBLE(c)) { /* show clients top down */
1722                 XMoveWindow(dpy, c->win, c->x, c->y);
1723                 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1724                         resize(c, c->x, c->y, c->w, c->h, False, 0);
1725                 showhide(c->snext);
1726         }
1727         else { /* hide clients bottom up */
1728                 showhide(c->snext);
1729                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1730         }
1731 }
1732
1733 void
1734 sigchld(int unused) {
1735         if(signal(SIGCHLD, sigchld) == SIG_ERR)
1736                 die("Can't install SIGCHLD handler");
1737         while(0 < waitpid(-1, NULL, WNOHANG));
1738 }
1739
1740 void
1741 kbspawn(const Arg *arg) {
1742         key_buffering = True;
1743         spawn(arg);
1744 }
1745
1746 void
1747 spawn(const Arg *arg) {
1748         int tag = 0, i;
1749         if(arg->v == termcmd || arg->v == runcmd) {
1750                 for(i = 0; i < 32; ++i) {
1751                         if(selmon->tagset[selmon->seltags] & (1 << i)) {
1752                                 tag = i;
1753                                 break;
1754                         }
1755                 }
1756                 WORKSPACE_NUMBER[17] = workspace_numbers_str[tag][0];
1757                 WORKSPACE_NUMBER[18] = workspace_numbers_str[tag][1]; // 2nd digit or null
1758         }
1759         if(arg->v == dmenucmd)
1760                 dmenumon[0] = '0' + selmon->num;
1761         if(fork() == 0) {
1762                 if(dpy)
1763                         close(ConnectionNumber(dpy));
1764                 setsid();
1765                 execvp(((char **)arg->v)[0], (char **)arg->v);
1766                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1767                 perror(" failed");
1768                 exit(EXIT_SUCCESS);
1769         }
1770 }
1771
1772 void
1773 tag(const Arg *arg) {
1774         if(selmon->sel && arg->ui & TAGMASK) {
1775                 selmon->sel->tags = arg->ui & TAGMASK;
1776                 focus(NULL);
1777                 arrange(selmon);
1778         }
1779 }
1780
1781 void
1782 tagmon(const Arg *arg) {
1783         if(!selmon->sel || !mons->next)
1784                 return;
1785         sendmon(selmon->sel, dirtomon(arg->i));
1786 }
1787
1788 void
1789 tile(Monitor *m) {
1790         unsigned int i, n, h, mw, my, ty;
1791         Client *c;
1792
1793         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1794         if(n == 0)
1795                 return;
1796
1797         if(n > m->nmaster)
1798                 mw = m->nmaster ? m->ww * m->mfact : 0;
1799         else {
1800                 c = nexttiled(m->clients);
1801                 if (c && !c->screen_hog)
1802                         mw = m->ww * m->mfact;
1803                 else
1804                         mw = m->ww;
1805         }
1806         for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1807                 if(i < m->nmaster) {
1808                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1809                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False, 0);
1810                         my += HEIGHT(c);
1811                 }
1812                 else {
1813                         h = (m->wh - ty) / (n - i);
1814                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False, 0);
1815                         ty += HEIGHT(c);
1816                 }
1817 }
1818
1819 #define GUTTER_PX   4
1820 #define TAB_HEIGHT (bh / 2 - GUTTER_PX)
1821 #define TAB_PAD     GUTTER_PX
1822
1823 void
1824 jason_layout(Monitor *m) {
1825         unsigned int i, tiled_count, mw, right_width, tab_counts[2] = {0,0}, cur_tab = 0, *tab_count;
1826         int tab_top;
1827         Client *c, *vis_slave = 0, *base = 0;
1828
1829         tab_count = &(tab_counts[0]);
1830
1831         for(tiled_count = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), tiled_count++) {
1832                 if (tiled_count == 0) { // master
1833                         if (c->next) {
1834                                 if (m->sel && (m->sel == c || m->sel->isfloating || !ISVISIBLE(m->sel))) {
1835                                         vis_slave = nexttiled(c->next);
1836                                 } else {
1837                                         vis_slave = m->sel;
1838                                 }
1839                         }
1840                 } else {
1841                         if (c == vis_slave) {
1842                                 tab_count = &(tab_counts[1]);
1843                         } else {
1844                                 (*tab_count) += 1;
1845                         }
1846                 }
1847         }
1848         if(tiled_count == 0) {
1849                 return;
1850         }
1851
1852         if(tiled_count > 1 || (tiled_count == 1 && !nexttiled(m->clients)->screen_hog)) {
1853                 mw = m->ww * m->mfact;
1854         } else {
1855                 mw = m->ww;
1856         }
1857         right_width = m->ww - mw - GUTTER_PX;
1858         tab_count = &(tab_counts[0]);
1859         tab_top = m->my - m->wh + TAB_HEIGHT;
1860         for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
1861                 if (i == 0) {
1862                         resize(c, m->wx, m->wy, mw, m->wh, False, 0);
1863                 } else {
1864                         if (c == vis_slave) {
1865                                 resize(c,
1866                                         m->wx + mw + GUTTER_PX,
1867                                         m->my + TAB_HEIGHT + TAB_PAD,
1868                                         right_width,
1869                                         m->wh,
1870                                         False,
1871                                         base
1872                                 );
1873                                 tab_count = &(tab_counts[1]);
1874                                 tab_top = m->my + m->mh - TAB_HEIGHT;
1875                                 cur_tab = 0;
1876                         } else {
1877                                 // this function does not get called when focus changes
1878                                 // resize(c, m->wx + m->ww, m->wy, m->ww - mw, m->wh, False);
1879                                 resize(c,
1880                                         m->wx + mw + GUTTER_PX + right_width * cur_tab / (*tab_count),
1881                                         tab_top,
1882                                         right_width,
1883                                         m->wh,
1884                                         False,
1885                                         base
1886                                 );
1887                                 cur_tab += 1;
1888                         }
1889                 }
1890                 base = c;
1891         }
1892 }
1893
1894 void
1895 togglebar(const Arg *arg) {
1896         selmon->showbar = !selmon->showbar;
1897         updatebarpos(selmon);
1898         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1899         arrange(selmon);
1900 }
1901
1902 void
1903 togglefloating(const Arg *arg) {
1904         if(!selmon->sel)
1905                 return;
1906         if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1907                 return;
1908         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1909         if(selmon->sel->isfloating)
1910                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1911                        selmon->sel->w, selmon->sel->h, False, 0);
1912         arrange(selmon);
1913 }
1914
1915 void
1916 toggletag(const Arg *arg) {
1917         unsigned int newtags;
1918
1919         if(!selmon->sel)
1920                 return;
1921         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1922         if(newtags) {
1923                 selmon->sel->tags = newtags;
1924                 focus(NULL);
1925                 arrange(selmon);
1926         }
1927 }
1928
1929 void
1930 toggleview(const Arg *arg) {
1931         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1932
1933         if(newtagset) {
1934                 selmon->tagset[selmon->seltags] = newtagset;
1935                 focus(NULL);
1936                 arrange(selmon);
1937         }
1938 }
1939
1940 void
1941 unfocus(Client *c, Bool setfocus) {
1942         if(!c)
1943                 return;
1944         grabbuttons(c, False);
1945         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->rgb);
1946         if(setfocus) {
1947                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1948                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1949         }
1950 }
1951
1952 void
1953 unmanage(Client *c, Bool destroyed) {
1954         Monitor *m = c->mon;
1955         XWindowChanges wc;
1956
1957         /* The server grab construct avoids race conditions. */
1958         detachstack(c);
1959         detach(c);
1960         if(!destroyed) {
1961                 wc.border_width = c->oldbw;
1962                 XGrabServer(dpy);
1963                 XSetErrorHandler(xerrordummy);
1964                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1965                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1966                 setclientstate(c, WithdrawnState);
1967                 XSync(dpy, False);
1968                 XSetErrorHandler(xerror);
1969                 XUngrabServer(dpy);
1970         }
1971         free(c);
1972         focus(selmon ? selmon->sel : NULL);
1973         updateclientlist();
1974         arrange(m);
1975 }
1976
1977 void
1978 unmapnotify(XEvent *e) {
1979         Client *c;
1980         XUnmapEvent *ev = &e->xunmap;
1981
1982         if((c = wintoclient(ev->window))) {
1983                 if(ev->send_event)
1984                         setclientstate(c, WithdrawnState);
1985                 else
1986                         unmanage(c, False);
1987         }
1988 }
1989
1990 void
1991 updatebars(void) {
1992         Monitor *m;
1993         XSetWindowAttributes wa = {
1994                 .override_redirect = True,
1995                 .background_pixmap = ParentRelative,
1996                 .event_mask = ButtonPressMask|ExposureMask
1997         };
1998         for(m = mons; m; m = m->next) {
1999                 if (m->barwin)
2000                         continue;
2001                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww * m->mfact, bh, 0, DefaultDepth(dpy, screen),
2002                                           CopyFromParent, DefaultVisual(dpy, screen),
2003                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
2004                 XChangeProperty(dpy, root, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
2005                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
2006                 XChangeProperty(dpy, m->barwin, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
2007                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
2008                 XChangeProperty(dpy, m->barwin, netatom[NetWMName], XA_STRING, 8,
2009                                 PropModeReplace, (unsigned char *) "dwm", 3);
2010                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
2011                 XMapRaised(dpy, m->barwin);
2012         }
2013 }
2014
2015 void
2016 updatebarpos(Monitor *m) {
2017         m->wy = m->my;
2018         m->wh = m->mh;
2019         if(m->showbar) {
2020                 m->wh -= bh;
2021                 m->by = m->topbar ? m->wy : m->wy + m->wh;
2022                 m->wy = m->topbar ? m->wy + bh : m->wy;
2023         }
2024         else
2025                 m->by = -bh;
2026 }
2027
2028 void
2029 updateclientlist() {
2030         Client *c;
2031         Monitor *m;
2032
2033         XDeleteProperty(dpy, root, netatom[NetClientList]);
2034         for(m = mons; m; m = m->next)
2035                 for(c = m->clients; c; c = c->next)
2036                         XChangeProperty(dpy, root, netatom[NetClientList],
2037                                         XA_WINDOW, 32, PropModeAppend,
2038                                         (unsigned char *) &(c->win), 1);
2039 }
2040
2041 Bool
2042 updategeom(void) {
2043         Bool dirty = False;
2044
2045 #ifdef XINERAMA
2046         if(XineramaIsActive(dpy)) {
2047                 int i, j, n, nn;
2048                 Client *c;
2049                 Monitor *m;
2050                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2051                 XineramaScreenInfo *unique = NULL;
2052
2053                 for(n = 0, m = mons; m; m = m->next, n++);
2054                 /* only consider unique geometries as separate screens */
2055                 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
2056                         die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
2057                 for(i = 0, j = 0; i < nn; i++)
2058                         if(isuniquegeom(unique, j, &info[i]))
2059                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2060                 XFree(info);
2061                 nn = j;
2062                 if(n <= nn) {
2063                         for(i = 0; i < (nn - n); i++) { /* new monitors available */
2064                                 for(m = mons; m && m->next; m = m->next);
2065                                 if(m)
2066                                         m->next = createmon();
2067                                 else
2068                                         mons = createmon();
2069                         }
2070                         for(i = 0, m = mons; i < nn && m; m = m->next, i++)
2071                                 if(i >= n
2072                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
2073                                     || unique[i].width != m->mw || unique[i].height != m->mh))
2074                                 {
2075                                         dirty = True;
2076                                         m->num = i;
2077                                         m->mx = m->wx = unique[i].x_org;
2078                                         m->my = m->wy = unique[i].y_org;
2079                                         m->mw = m->ww = unique[i].width;
2080                                         m->mh = m->wh = unique[i].height;
2081                                         updatebarpos(m);
2082                                 }
2083                 }
2084                 else { /* less monitors available nn < n */
2085                         for(i = nn; i < n; i++) {
2086                                 for(m = mons; m && m->next; m = m->next);
2087                                 while(m->clients) {
2088                                         dirty = True;
2089                                         c = m->clients;
2090                                         m->clients = c->next;
2091                                         detachstack(c);
2092                                         c->mon = mons;
2093                                         attach(c);
2094                                         attachstack(c);
2095                                 }
2096                                 if(m == selmon)
2097                                         selmon = mons;
2098                                 cleanupmon(m);
2099                         }
2100                 }
2101                 free(unique);
2102         }
2103         else
2104 #endif /* XINERAMA */
2105         /* default monitor setup */
2106         {
2107                 if(!mons)
2108                         mons = createmon();
2109                 if(mons->mw != sw || mons->mh != sh) {
2110                         dirty = True;
2111                         mons->mw = mons->ww = sw;
2112                         mons->mh = mons->wh = sh;
2113                         updatebarpos(mons);
2114                 }
2115         }
2116         if(dirty) {
2117                 selmon = mons;
2118                 selmon = wintomon(root);
2119         }
2120         return dirty;
2121 }
2122
2123 void
2124 updatenumlockmask(void) {
2125         unsigned int i, j;
2126         XModifierKeymap *modmap;
2127
2128         numlockmask = 0;
2129         modmap = XGetModifierMapping(dpy);
2130         for(i = 0; i < 8; i++)
2131                 for(j = 0; j < modmap->max_keypermod; j++)
2132                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
2133                            == XKeysymToKeycode(dpy, XK_Num_Lock))
2134                                 numlockmask = (1 << i);
2135         XFreeModifiermap(modmap);
2136 }
2137
2138 void
2139 updatesizehints(Client *c) {
2140         long msize;
2141         XSizeHints size;
2142
2143         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
2144                 /* size is uninitialized, ensure that size.flags aren't used */
2145                 size.flags = PSize;
2146         if(size.flags & PBaseSize) {
2147                 c->basew = size.base_width;
2148                 c->baseh = size.base_height;
2149         }
2150         else if(size.flags & PMinSize) {
2151                 c->basew = size.min_width;
2152                 c->baseh = size.min_height;
2153         }
2154         else
2155                 c->basew = c->baseh = 0;
2156         if(size.flags & PResizeInc) {
2157                 c->incw = size.width_inc;
2158                 c->inch = size.height_inc;
2159         }
2160         else
2161                 c->incw = c->inch = 0;
2162         if(size.flags & PMaxSize) {
2163                 c->maxw = size.max_width;
2164                 c->maxh = size.max_height;
2165         }
2166         else
2167                 c->maxw = c->maxh = 0;
2168         if(size.flags & PMinSize) {
2169                 c->minw = size.min_width;
2170                 c->minh = size.min_height;
2171         }
2172         else if(size.flags & PBaseSize) {
2173                 c->minw = size.base_width;
2174                 c->minh = size.base_height;
2175         }
2176         else
2177                 c->minw = c->minh = 0;
2178         if(size.flags & PAspect) {
2179                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2180                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2181         }
2182         else
2183                 c->maxa = c->mina = 0.0;
2184         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
2185                      && c->maxw == c->minw && c->maxh == c->minh);
2186 }
2187
2188 void
2189 updatetitle(Client *c) {
2190         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2191                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2192         if(c->name[0] == '\0') /* hack to mark broken clients */
2193                 strcpy(c->name, broken);
2194 }
2195
2196 void
2197 updatestatus(void) {
2198         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2199                 strcpy(stext, "dwm-"VERSION);
2200         drawbar(selmon);
2201 }
2202
2203 void
2204 updatewindowtype(Client *c) {
2205         Atom state = getatomprop(c, netatom[NetWMState]);
2206         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2207
2208         if(state == netatom[NetWMFullscreen])
2209                 setfullscreen(c, True);
2210         if(wtype == netatom[NetWMWindowTypeDialog])
2211                 c->isfloating = True;
2212 }
2213
2214 void
2215 updatewmhints(Client *c) {
2216         XWMHints *wmh;
2217
2218         if((wmh = XGetWMHints(dpy, c->win))) {
2219                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2220                         wmh->flags &= ~XUrgencyHint;
2221                         XSetWMHints(dpy, c->win, wmh);
2222                 }
2223                 else
2224                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2225                 if(wmh->flags & InputHint)
2226                         c->neverfocus = !wmh->input;
2227                 else
2228                         c->neverfocus = False;
2229                 XFree(wmh);
2230         }
2231 }
2232
2233 void
2234 view(const Arg *arg) {
2235         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2236                 return;
2237         selmon->seltags ^= 1; /* toggle sel tagset */
2238         if(arg->ui & TAGMASK)
2239                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2240         focus(NULL);
2241         arrange(selmon);
2242 }
2243
2244 Client *
2245 wintoclient(Window w) {
2246         Client *c;
2247         Monitor *m;
2248
2249         for(m = mons; m; m = m->next)
2250                 for(c = m->clients; c; c = c->next)
2251                         if(c->win == w)
2252                                 return c;
2253         return NULL;
2254 }
2255
2256 Monitor *
2257 wintomon(Window w) {
2258         int x, y;
2259         Client *c;
2260         Monitor *m;
2261
2262         if(w == root && getrootptr(&x, &y))
2263                 return recttomon(x, y, 1, 1);
2264         for(m = mons; m; m = m->next)
2265                 if(w == m->barwin)
2266                         return m;
2267         if((c = wintoclient(w)))
2268                 return c->mon;
2269         return selmon;
2270 }
2271
2272 /* There's no way to check accesses to destroyed windows, thus those cases are
2273  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2274  * default error handler, which may call exit.  */
2275 int
2276 xerror(Display *dpy, XErrorEvent *ee) {
2277         if(ee->error_code == BadWindow
2278         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2279         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2280         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2281         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2282         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2283         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2284         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2285         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2286                 return 0;
2287         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2288                         ee->request_code, ee->error_code);
2289         return xerrorxlib(dpy, ee); /* may call exit */
2290 }
2291
2292 int
2293 xerrordummy(Display *dpy, XErrorEvent *ee) {
2294         return 0;
2295 }
2296
2297 /* Startup Error handler to check if another window manager
2298  * is already running. */
2299 int
2300 xerrorstart(Display *dpy, XErrorEvent *ee) {
2301         die("dwm: another window manager is already running\n");
2302         return -1;
2303 }
2304
2305 void
2306 zoom(const Arg *arg) {
2307         Client *c = selmon->sel;
2308
2309         if(!selmon->lt[selmon->sellt]->arrange
2310         || (selmon->sel && selmon->sel->isfloating))
2311                 return;
2312         if(c == nexttiled(selmon->clients))
2313                 if(!c || !(c = nexttiled(c->next)))
2314                         return;
2315         pop(c);
2316 }
2317
2318 int
2319 main(int argc, char *argv[]) {
2320         if(argc == 2 && !strcmp("-v", argv[1]))
2321                 die("dwm-"VERSION", © 2006-2014 dwm engineers, see LICENSE for details\n");
2322         else if(argc != 1)
2323                 die("usage: dwm [-v]\n");
2324         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2325                 fputs("warning: no locale support\n", stderr);
2326         if(!(dpy = XOpenDisplay(NULL)))
2327                 die("dwm: cannot open display\n");
2328         checkotherwm();
2329         setup();
2330         scan();
2331         run();
2332         cleanup();
2333         XCloseDisplay(dpy);
2334         return EXIT_SUCCESS;
2335 }