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, blw = 0;      /* bar geometry */
 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, 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 - w;
 818                 if(x < xx) {
 819                         x = xx;
 820                         w = m->ww - 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                 }
 833                 else {
 834                         drw_setscheme(drw, &scheme[SchemeNorm]);
 835                         drw_text(drw, x, 0, w, bh, NULL, 0);
 836                 }
 837         }
 838         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 839 }
 840
 841 void
 842 drawbars(void) {
 843         Monitor *m;
 844
 845         for(m = mons; m; m = m->next)
 846                 drawbar(m);
 847 }
 848
 849 void
 850 enternotify(XEvent *e) {
 851         Client *c;
 852         Monitor *m;
 853         XCrossingEvent *ev = &e->xcrossing;
 854
 855         return; // jason: added to stop mouse focus
 856
 857         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 858                 return;
 859         c = wintoclient(ev->window);
 860         m = c ? c->mon : wintomon(ev->window);
 861         if(m != selmon) {
 862                 unfocus(selmon->sel, True);
 863                 selmon = m;
 864         }
 865         else if(!c || c == selmon->sel)
 866                 return;
 867         focus(c);
 868 }
 869
 870 void
 871 expose(XEvent *e) {
 872         Monitor *m;
 873         XExposeEvent *ev = &e->xexpose;
 874
 875         if(ev->count == 0 && (m = wintomon(ev->window)))
 876                 drawbar(m);
 877 }
 878
 879 void
 880 focus(Client *c) {
 881         if(!c || !ISVISIBLE(c))
 882                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 883         /* was if(selmon->sel) */
 884         if(selmon->sel && selmon->sel != c)
 885                 unfocus(selmon->sel, False);
 886         if(c) {
 887                 if(c->mon != selmon)
 888                         selmon = c->mon;
 889                 if(c->isurgent)
 890                         clearurgent(c);
 891                 detachstack(c);
 892                 attachstack(c);
 893                 grabbuttons(c, True);
 894                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->rgb);
 895                 setfocus(c);
 896         }
 897         else {
 898                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 899                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 900         }
 901         selmon->sel = c;
 902         arrange(selmon);
 903         update_window_opacities(selmon);
 904         drawbars();
 905         if(c && (!root || (c->win!=root)) )
 906                 window_set_opaque(c);
 907 }
 908
 909 void
 910 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 911         XFocusChangeEvent *ev = &e->xfocus;
 912
 913         if(selmon->sel && ev->window != selmon->sel->win)
 914                 setfocus(selmon->sel);
 915 }
 916
 917 void
 918 focusmon(const Arg *arg) {
 919         Monitor *m;
 920
 921         if(!mons->next)
 922                 return;
 923         if((m = dirtomon(arg->i)) == selmon)
 924                 return;
 925         unfocus(selmon->sel, False); /* s/True/False/ fixes input focus issues
 926                                         in gedit and anjuta */
 927         selmon = m;
 928         focus(NULL);
 929 }
 930
 931 void
 932 focusstack(const Arg *arg) {
 933         Client *c = NULL, *i;
 934
 935         if(!selmon->sel)
 936                 return;
 937         if(arg->i == 0) {
 938                 for(i = selmon->clients; i != selmon->sel; i = i->next) {
 939                         if(ISVISIBLE(i)) {
 940                                 c = i;
 941                                 break;
 942                         }
 943                 }
 944         } else if(arg->i > 0) {
 945                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 946                 if(!c)
 947                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 948         }
 949         else {
 950                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 951                         if(ISVISIBLE(i))
 952                                 c = i;
 953                 if(!c)
 954                         for(; i; i = i->next)
 955                                 if(ISVISIBLE(i))
 956                                         c = i;
 957         }
 958         if(c) {
 959                 focus(c);
 960                 restack(selmon);
 961         }
 962 }
 963
 964 Atom
 965 getatomprop(Client *c, Atom prop) {
 966         int di;
 967         unsigned long dl;
 968         unsigned char *p = NULL;
 969         Atom da, atom = None;
 970
 971         if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 972                               &da, &di, &dl, &dl, &p) == Success && p) {
 973                 atom = *(Atom *)p;
 974                 XFree(p);
 975         }
 976         return atom;
 977 }
 978
 979 Bool
 980 getrootptr(int *x, int *y) {
 981         int di;
 982         unsigned int dui;
 983         Window dummy;
 984
 985         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 986 }
 987
 988 long
 989 getstate(Window w) {
 990         int format;
 991         long result = -1;
 992         unsigned char *p = NULL;
 993         unsigned long n, extra;
 994         Atom real;
 995
 996         if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 997                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 998                 return -1;
 999         if(n != 0)
1000                 result = *p;
1001         XFree(p);
1002         return result;
1003 }
1004
1005 Bool
1006 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
1007         char **list = NULL;
1008         int n;
1009         XTextProperty name;
1010
1011         if(!text || size == 0)
1012                 return False;
1013         text[0] = '\0';
1014         XGetTextProperty(dpy, w, &name, atom);
1015         if(!name.nitems)
1016                 return False;
1017         if(name.encoding == XA_STRING)
1018                 strncpy(text, (char *)name.value, size - 1);
1019         else {
1020                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1021                         strncpy(text, *list, size - 1);
1022                         XFreeStringList(list);
1023                 }
1024         }
1025         text[size - 1] = '\0';
1026         XFree(name.value);
1027         return True;
1028 }
1029
1030 void
1031 grabbuttons(Client *c, Bool focused) {
1032         updatenumlockmask();
1033         {
1034                 unsigned int i, j;
1035                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1036                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1037                 if(focused) {
1038                         for(i = 0; i < LENGTH(buttons); i++)
1039                                 if(buttons[i].click == ClkClientWin || buttons[i].click == ClkAnywhere)
1040                                         for(j = 0; j < LENGTH(modifiers); j++)
1041                                                 XGrabButton(dpy, buttons[i].button,
1042                                                             buttons[i].mask | modifiers[j],
1043                                                             c->win, False, BUTTONMASK,
1044                                                             GrabModeAsync, GrabModeSync, None, None);
1045                 } else {
1046                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1047                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1048                 }
1049         }
1050 }
1051
1052 void
1053 grabkeys(void) {
1054         updatenumlockmask();
1055         //XUngrabKey(dpy, AnyKey, AnyModifier, root);
1056         {
1057                 unsigned int i, j;
1058                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1059                 KeyCode code;
1060
1061                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1062                 for(i = 0; i < LENGTH(keys); i++)
1063                         if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1064                                 for(j = 0; j < LENGTH(modifiers); j++)
1065                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1066                                                  True, GrabModeAsync,
1067                                                  keys[i].func == kbspawn ? GrabModeSync : GrabModeAsync);
1068         }
1069 }
1070
1071 void
1072 incnmaster(const Arg *arg) {
1073         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1074         arrange(selmon);
1075 }
1076
1077 #ifdef XINERAMA
1078 static Bool
1079 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1080         while(n--)
1081                 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1082                 && unique[n].width == info->width && unique[n].height == info->height)
1083                         return False;
1084         return True;
1085 }
1086 #endif /* XINERAMA */
1087
1088 void
1089 keypress(XEvent *e) {
1090         unsigned int i;
1091         KeySym keysym;
1092         XKeyEvent *ev;
1093
1094         ev = &e->xkey;
1095         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1096         for(i = 0; i < LENGTH(keys); i++) {
1097                 if(keysym == keys[i].keysym
1098                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1099                 && keys[i].func) {
1100                         keys[i].func(&(keys[i].arg));
1101                 }
1102         }
1103 }
1104
1105 void
1106 killclient(const Arg *arg) {
1107         if(!selmon->sel)
1108                 return;
1109         if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1110                 XGrabServer(dpy);
1111                 XSetErrorHandler(xerrordummy);
1112                 XSetCloseDownMode(dpy, DestroyAll);
1113                 XKillClient(dpy, selmon->sel->win);
1114                 XSync(dpy, False);
1115                 XSetErrorHandler(xerror);
1116                 XUngrabServer(dpy);
1117         }
1118 }
1119
1120 void
1121 manage(Window w, XWindowAttributes *wa) {
1122         Client *c, *t = NULL;
1123         Window trans = None;
1124         XWindowChanges wc;
1125
1126         if(!(c = calloc(1, sizeof(Client))))
1127                 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1128         c->opacity = -1; // who knows
1129         c->win = w;
1130         updatetitle(c);
1131         if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1132                 c->mon = t->mon;
1133                 c->tags = t->tags;
1134         }
1135         else {
1136                 c->mon = selmon;
1137                 applyrules(c);
1138         }
1139         /* geometry */
1140         if(c->x == -1 && c->y == -2) { // secret code for centered
1141                 c->x = c->oldx = (c->mon->ww - wa->width) / 2;
1142                 c->y = c->oldy = (c->mon->wh - wa->height) / 2;
1143         } else {
1144                 c->x = c->oldx = wa->x;
1145                 c->y = c->oldy = wa->y;
1146         }
1147         c->w = c->oldw = wa->width;
1148         c->h = c->oldh = wa->height;
1149         c->oldbw = wa->border_width;
1150
1151         if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1152                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1153         if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1154                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1155         c->x = MAX(c->x, c->mon->mx);
1156         /* only fix client y-offset, if the client center might cover the bar */
1157         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1158                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1159         c->bw = borderpx;
1160
1161         wc.border_width = c->bw;
1162         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1163         XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->rgb);
1164         configure(c); /* propagates border_width, if size doesn't change */
1165         updatewindowtype(c);
1166         updatesizehints(c);
1167         updatewmhints(c);
1168         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1169         grabbuttons(c, False);
1170         if(!c->isfloating)
1171                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1172         if(c->isfloating)
1173                 XRaiseWindow(dpy, c->win);
1174         attach(c);
1175         attachstack(c);
1176         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1177                         (unsigned char *) &(c->win), 1);
1178         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1179         setclientstate(c, NormalState);
1180         if (c->mon == selmon)
1181                 unfocus(selmon->sel, False);
1182         c->mon->sel = c;
1183         arrange(c->mon);
1184         XMapWindow(dpy, c->win);
1185         focus(c);
1186         if(key_buffering) {
1187                 key_buffering = False;
1188                 XAllowEvents(dpy, AsyncKeyboard, CurrentTime);
1189         }
1190 }
1191
1192 void
1193 mappingnotify(XEvent *e) {
1194         XMappingEvent *ev = &e->xmapping;
1195         // fprintf(stderr, "MapNotify\n");
1196
1197         XRefreshKeyboardMapping(ev);
1198         if(ev->request == MappingKeyboard)
1199                 grabkeys();
1200 }
1201
1202 void
1203 maprequest(XEvent *e) {
1204         static XWindowAttributes wa;
1205         XMapRequestEvent *ev = &e->xmaprequest;
1206
1207         // fprintf(stderr, "MapRequest\n");
1208         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1209                 return;
1210         if(wa.override_redirect) {
1211                 return;
1212         }
1213         if(!wintoclient(ev->window))
1214                 manage(ev->window, &wa);
1215 }
1216
1217 void
1218 monocle(Monitor *m) {
1219         unsigned int n = 0;
1220         Client *c;
1221
1222         for(c = m->clients; c; c = c->next)
1223                 if(ISVISIBLE(c))
1224                         n++;
1225         if(n > 0) /* override layout symbol */
1226                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1227         for(c = snexttiled(m->stack); c; c = snexttiled(c->snext)) {
1228                 if (c == m->sel) {
1229                         resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False, 0);
1230                 } else {
1231                         // this window is should not be visible. move off top, but don't change h/w
1232                         resize(c, m->wx, m->wy - 4000, c->w, c->h, False, 0);
1233                 }
1234         }
1235 }
1236
1237 void
1238 motionnotify(XEvent *e) {
1239         static Monitor *mon = NULL;
1240         Monitor *m;
1241         XMotionEvent *ev = &e->xmotion;
1242
1243         if(ev->window != root)
1244                 return;
1245         if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1246                 unfocus(selmon->sel, True);
1247                 selmon = m;
1248                 focus(NULL);
1249         }
1250         mon = m;
1251 }
1252
1253 void
1254 movemouse(const Arg *arg) {
1255         int x, y, ocx, ocy, nx, ny;
1256         Client *c;
1257         Monitor *m;
1258         XEvent ev;
1259         Time lasttime = 0;
1260
1261         if(!(c = selmon->sel))
1262                 return;
1263         if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1264                 return;
1265         restack(selmon);
1266         ocx = c->x;
1267         ocy = c->y;
1268         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1269         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1270                 return;
1271         if(!getrootptr(&x, &y))
1272                 return;
1273         do {
1274                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1275                 switch(ev.type) {
1276                 case ConfigureRequest:
1277                 case Expose:
1278                 case MapRequest:
1279                         handler[ev.type](&ev);
1280                         break;
1281                 case MotionNotify:
1282                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1283                                 continue;
1284                         lasttime = ev.xmotion.time;
1285
1286                         nx = ocx + (ev.xmotion.x - x);
1287                         ny = ocy + (ev.xmotion.y - y);
1288                         if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1289                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1290                                 if(abs(selmon->wx - nx) < snap)
1291                                         nx = selmon->wx;
1292                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1293                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1294                                 if(abs(selmon->wy - ny) < snap)
1295                                         ny = selmon->wy;
1296                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1297                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1298                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1299                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1300                                         togglefloating(NULL);
1301                         }
1302                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1303                                 resize(c, nx, ny, c->w, c->h, True, 0);
1304                         break;
1305                 }
1306         } while(ev.type != ButtonRelease);
1307         XUngrabPointer(dpy, CurrentTime);
1308         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1309                 sendmon(c, m);
1310                 selmon = m;
1311                 focus(NULL);
1312         }
1313 }
1314
1315 Client *
1316 nexttiled(Client *c) {
1317         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1318         return c;
1319 }
1320
1321 Client *
1322 snexttiled(Client *c) {
1323         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->snext);
1324         return c;
1325 }
1326
1327 Client *
1328 nextvisible(Client *c) {
1329         for(; c && !ISVISIBLE(c); c = c->next);
1330         return c;
1331 }
1332
1333 void
1334 pop(Client *c) {
1335         detach(c);
1336         attach_as_master(c);
1337         focus(c);
1338         arrange(c->mon);
1339 }
1340
1341 void
1342 propertynotify(XEvent *e) {
1343         Client *c;
1344         Window trans;
1345         XPropertyEvent *ev = &e->xproperty;
1346
1347         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1348                 updatestatus();
1349         else if(ev->state == PropertyDelete)
1350                 return; /* ignore */
1351         else if((c = wintoclient(ev->window))) {
1352                 switch(ev->atom) {
1353                 default: break;
1354                 case XA_WM_TRANSIENT_FOR:
1355                         if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1356                            (c->isfloating = (wintoclient(trans)) != NULL))
1357                                 arrange(c->mon);
1358                         break;
1359                 case XA_WM_NORMAL_HINTS:
1360                         updatesizehints(c);
1361                         break;
1362                 case XA_WM_HINTS:
1363                         updatewmhints(c);
1364                         drawbars();
1365                         break;
1366                 }
1367                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1368                         updatetitle(c);
1369                         if(c == c->mon->sel)
1370                                 drawbar(c->mon);
1371                 }
1372                 if(ev->atom == netatom[NetWMWindowType])
1373                         updatewindowtype(c);
1374         }
1375 }
1376
1377 void
1378 quit(const Arg *arg) {
1379         running = False;
1380 }
1381
1382 Monitor *
1383 recttomon(int x, int y, int w, int h) {
1384         Monitor *m, *r = selmon;
1385         int a, area = 0;
1386
1387         for(m = mons; m; m = m->next)
1388                 if((a = INTERSECT(x, y, w, h, m)) > area) {
1389                         area = a;
1390                         r = m;
1391                 }
1392         return r;
1393 }
1394
1395 void
1396 resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base) {
1397         if(applysizehints(c, &x, &y, &w, &h, interact))
1398                 resizeclient(c, x, y, w, h, base);
1399 }
1400
1401 void
1402 resizeclient(Client *c, int x, int y, int w, int h, Client *base) {
1403         XWindowChanges wc;
1404         unsigned long mask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
1405
1406         c->oldx = c->x; c->x = wc.x = x;
1407         c->oldy = c->y; c->y = wc.y = y;
1408         c->oldw = c->w; c->w = wc.width = w;
1409         c->oldh = c->h; c->h = wc.height = h;
1410         // base = 0;
1411         if (base) {
1412                 wc.stack_mode = Above;
1413                 wc.sibling = base->win;
1414                 mask |= CWStackMode|CWSibling;
1415         }
1416         wc.border_width = c->bw;
1417         XConfigureWindow(dpy, c->win, mask, &wc);
1418         configure(c);
1419         XSync(dpy, False);
1420 }
1421
1422 void
1423 resizemouse(const Arg *arg) {
1424         int ocx, ocy, nw, nh;
1425         Client *c;
1426         Monitor *m;
1427         XEvent ev;
1428         Time lasttime = 0;
1429
1430         if(!(c = selmon->sel))
1431                 return;
1432         if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1433                 return;
1434         restack(selmon);
1435         ocx = c->x;
1436         ocy = c->y;
1437         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1438                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1439                 return;
1440         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1441         do {
1442                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1443                 switch(ev.type) {
1444                 case ConfigureRequest:
1445                 case Expose:
1446                 case MapRequest:
1447                         handler[ev.type](&ev);
1448                         break;
1449                 case MotionNotify:
1450                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1451                                 continue;
1452                         lasttime = ev.xmotion.time;
1453
1454                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1455                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1456                         if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1457                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1458                         {
1459                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1460                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1461                                         togglefloating(NULL);
1462                         }
1463                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1464                                 resize(c, c->x, c->y, nw, nh, True, 0);
1465                         break;
1466                 }
1467         } while(ev.type != ButtonRelease);
1468         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1469         XUngrabPointer(dpy, CurrentTime);
1470         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1471         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1472                 sendmon(c, m);
1473                 selmon = m;
1474                 focus(NULL);
1475         }
1476 }
1477
1478 void
1479 restack(Monitor *m) {
1480         Client *c;
1481         XEvent ev;
1482         XWindowChanges wc;
1483
1484         drawbar(m);
1485         if(!m->sel)
1486                 return;
1487         if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1488                 XRaiseWindow(dpy, m->sel->win);
1489         if(m->lt[m->sellt]->arrange) {
1490                 wc.stack_mode = Below;
1491                 wc.sibling = m->barwin;
1492                 for(c = m->clients; c; c = c->next)
1493                         if(!c->isfloating && ISVISIBLE(c)) {
1494                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1495                                 wc.sibling = c->win;
1496                                 wc.stack_mode = Above;
1497                         }
1498         }
1499         XSync(dpy, False);
1500         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1501 }
1502
1503 void
1504 run(void) {
1505         XEvent ev;
1506         /* main event loop */
1507         XSync(dpy, False);
1508         while(running && !XNextEvent(dpy, &ev)) {
1509                 if(handler[ev.type]) {
1510                         // fprintf(stderr, "handling event type %i\n", ev.type);
1511                         handler[ev.type](&ev); /* call handler */
1512                 } else {
1513                         // fprintf(stderr, "evt type %i\n", ev.type);
1514                 }
1515         }
1516 }
1517
1518 void
1519 scan(void) {
1520         unsigned int i, num;
1521         Window d1, d2, *wins = NULL;
1522         XWindowAttributes wa;
1523
1524         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1525                 for(i = 0; i < num; i++) {
1526                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1527                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1528                                 continue;
1529                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1530                                 manage(wins[i], &wa);
1531                 }
1532                 for(i = 0; i < num; i++) { /* now the transients */
1533                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1534                                 continue;
1535                         if(XGetTransientForHint(dpy, wins[i], &d1)
1536                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1537                                 manage(wins[i], &wa);
1538                 }
1539                 if(wins)
1540                         XFree(wins);
1541         }
1542 }
1543
1544 void
1545 sendmon(Client *c, Monitor *m) {
1546         if(c->mon == m)
1547                 return;
1548         unfocus(c, True);
1549         detachstack(c);
1550         detach(c);
1551         c->mon = m;
1552         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1553         attach(c);
1554         attachstack(c);
1555         focus(NULL);
1556         arrange(NULL);
1557 }
1558
1559 void
1560 setclientstate(Client *c, long state) {
1561         long data[] = { state, None };
1562
1563         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1564                         PropModeReplace, (unsigned char *)data, 2);
1565 }
1566
1567 Bool
1568 sendevent(Client *c, Atom proto) {
1569         int n;
1570         Atom *protocols;
1571         Bool exists = False;
1572         XEvent ev;
1573
1574         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1575                 while(!exists && n--)
1576                         exists = protocols[n] == proto;
1577                 XFree(protocols);
1578         }
1579         if(exists) {
1580                 ev.type = ClientMessage;
1581                 ev.xclient.window = c->win;
1582                 ev.xclient.message_type = wmatom[WMProtocols];
1583                 ev.xclient.format = 32;
1584                 ev.xclient.data.l[0] = proto;
1585                 ev.xclient.data.l[1] = CurrentTime;
1586                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1587         }
1588         return exists;
1589 }
1590
1591 void
1592 setfocus(Client *c) {
1593         if(!c->neverfocus) {
1594                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1595                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1596                                 XA_WINDOW, 32, PropModeReplace,
1597                                 (unsigned char *) &(c->win), 1);
1598         }
1599         sendevent(c, wmatom[WMTakeFocus]);
1600 }
1601
1602 void
1603 setfullscreen(Client *c, Bool fullscreen) {
1604         if(fullscreen) {
1605                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1606                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1607                 c->isfullscreen = True;
1608                 c->oldstate = c->isfloating;
1609                 c->oldbw = c->bw;
1610                 c->bw = 0;
1611                 c->isfloating = True;
1612                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh, 0);
1613                 XRaiseWindow(dpy, c->win);
1614         }
1615         else {
1616                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1617                                 PropModeReplace, (unsigned char*)0, 0);
1618                 c->isfullscreen = False;
1619                 c->isfloating = c->oldstate;
1620                 c->bw = c->oldbw;
1621                 c->x = c->oldx;
1622                 c->y = c->oldy;
1623                 c->w = c->oldw;
1624                 c->h = c->oldh;
1625                 resizeclient(c, c->x, c->y, c->w, c->h, 0);
1626                 arrange(c->mon);
1627         }
1628 }
1629
1630 void
1631 setlayout(const Arg *arg) {
1632         if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1633                 selmon->sellt ^= 1;
1634         if(arg && arg->v)
1635                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1636         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1637         if(selmon->sel)
1638                 arrange(selmon);
1639         else
1640                 drawbar(selmon);
1641 }
1642
1643 /* arg > 1.0 will set mfact absolutly */
1644 void
1645 setmfact(const Arg *arg) {
1646         float f;
1647
1648         if(!arg || !selmon->lt[selmon->sellt]->arrange)
1649                 return;
1650         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1651         if(f < 0.1 || f > 0.9)
1652                 return;
1653         selmon->mfact = f;
1654         arrange(selmon);
1655 }
1656
1657 void
1658 setup(void) {
1659         XSetWindowAttributes wa;
1660
1661         /* clean up any zombies immediately */
1662         sigchld(0);
1663
1664         /* init screen */
1665         screen = DefaultScreen(dpy);
1666         root = RootWindow(dpy, screen);
1667         fnt = drw_font_create(dpy, font);
1668         sw = DisplayWidth(dpy, screen);
1669         sh = DisplayHeight(dpy, screen);
1670         bh = fnt->h + 2;
1671         drw = drw_create(dpy, screen, root, sw, sh);
1672         drw_setfont(drw, fnt);
1673         updategeom();
1674         /* init atoms */
1675         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1676         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1677         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1678         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1679         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1680         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1681         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1682         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1683         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1684         netatom[NetWMWindowOpacity] = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
1685         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1686         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1687         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1688         netatom[NetSupportingWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1689         XInternAtom(dpy, "_MOTIF_WM_HINTS", False); /* clients may request borderless/fullscreen */
1690         /* init cursors */
1691         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1692         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1693         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1694         /* init appearance */
1695         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1696         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1697         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1698         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1699         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1700         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1701         /* init bars */
1702         updatebars();
1703         updatestatus();
1704         /* EWMH support per view */
1705         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1706                         PropModeReplace, (unsigned char *) netatom, NetLast);
1707         XDeleteProperty(dpy, root, netatom[NetClientList]);
1708         /* select for events */
1709         wa.cursor = cursor[CurNormal]->cursor;
1710         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1711                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1712         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1713         XSelectInput(dpy, root, wa.event_mask);
1714         grabkeys();
1715         focus(NULL);
1716 }
1717
1718 void
1719 showhide(Client *c) {
1720         if(!c)
1721                 return;
1722         if(ISVISIBLE(c)) { /* show clients top down */
1723                 XMoveWindow(dpy, c->win, c->x, c->y);
1724                 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1725                         resize(c, c->x, c->y, c->w, c->h, False, 0);
1726                 showhide(c->snext);
1727         }
1728         else { /* hide clients bottom up */
1729                 showhide(c->snext);
1730                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1731         }
1732 }
1733
1734 void
1735 sigchld(int unused) {
1736         if(signal(SIGCHLD, sigchld) == SIG_ERR)
1737                 die("Can't install SIGCHLD handler");
1738         while(0 < waitpid(-1, NULL, WNOHANG));
1739 }
1740
1741 void
1742 kbspawn(const Arg *arg) {
1743         key_buffering = True;
1744         spawn(arg);
1745 }
1746
1747 void
1748 spawn(const Arg *arg) {
1749         int tag = 0, i;
1750         if(arg->v == termcmd || arg->v == runcmd) {
1751                 for(i = 0; i < 32; ++i) {
1752                         if(selmon->tagset[selmon->seltags] & (1 << i)) {
1753                                 tag = i;
1754                                 break;
1755                         }
1756                 }
1757                 WORKSPACE_NUMBER[17] = workspace_numbers_str[tag][0];
1758                 WORKSPACE_NUMBER[18] = workspace_numbers_str[tag][1]; // 2nd digit or null
1759         }
1760         if(arg->v == dmenucmd)
1761                 dmenumon[0] = '0' + selmon->num;
1762         if(fork() == 0) {
1763                 if(dpy)
1764                         close(ConnectionNumber(dpy));
1765                 setsid();
1766                 execvp(((char **)arg->v)[0], (char **)arg->v);
1767                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1768                 perror(" failed");
1769                 exit(EXIT_SUCCESS);
1770         }
1771 }
1772
1773 void
1774 tag(const Arg *arg) {
1775         if(selmon->sel && arg->ui & TAGMASK) {
1776                 selmon->sel->tags = arg->ui & TAGMASK;
1777                 focus(NULL);
1778                 arrange(selmon);
1779         }
1780 }
1781
1782 void
1783 tagmon(const Arg *arg) {
1784         if(!selmon->sel || !mons->next)
1785                 return;
1786         sendmon(selmon->sel, dirtomon(arg->i));
1787 }
1788
1789 void
1790 tile(Monitor *m) {
1791         unsigned int i, n, h, mw, my, ty;
1792         Client *c;
1793
1794         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1795         if(n == 0)
1796                 return;
1797
1798         if(n > m->nmaster)
1799                 mw = m->nmaster ? m->ww * m->mfact : 0;
1800         else {
1801                 c = nexttiled(m->clients);
1802                 if (c && !c->screen_hog)
1803                         mw = m->ww * m->mfact;
1804                 else
1805                         mw = m->ww;
1806         }
1807         for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1808                 if(i < m->nmaster) {
1809                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1810                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False, 0);
1811                         my += HEIGHT(c);
1812                 }
1813                 else {
1814                         h = (m->wh - ty) / (n - i);
1815                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False, 0);
1816                         ty += HEIGHT(c);
1817                 }
1818 }
1819
1820 #define TAB_HEIGHT 19
1821 #define TAB_PAD     7
1822 #define GUTTER_PX   8
1823
1824 void
1825 jason_layout(Monitor *m) {
1826         unsigned int i, tiled_count, mw, right_width, tab_counts[2] = {0,0}, cur_tab = 0, *tab_count;
1827         int tab_top;
1828         Client *c, *vis_slave = 0, *base = 0;
1829
1830         tab_count = &(tab_counts[0]);
1831
1832         for(tiled_count = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), tiled_count++) {
1833                 if (tiled_count == 0) { // master
1834                         if (c->next) {
1835                                 if (m->sel && (m->sel == c || m->sel->isfloating || !ISVISIBLE(m->sel))) {
1836                                         vis_slave = nexttiled(c->next);
1837                                 } else {
1838                                         vis_slave = m->sel;
1839                                 }
1840                         }
1841                 } else {
1842                         if (c == vis_slave) {
1843                                 tab_count = &(tab_counts[1]);
1844                         } else {
1845                                 (*tab_count) += 1;
1846                         }
1847                 }
1848         }
1849         if(tiled_count == 0) {
1850                 return;
1851         }
1852
1853         if(tiled_count > 1 || (tiled_count == 1 && !nexttiled(m->clients)->screen_hog)) {
1854                 mw = m->ww * m->mfact;
1855         } else {
1856                 mw = m->ww;
1857         }
1858         right_width = m->ww - mw - GUTTER_PX;
1859         tab_count = &(tab_counts[0]);
1860         tab_top = m->wy - (m->wh - (2 * (TAB_HEIGHT + TAB_PAD))) + TAB_HEIGHT;
1861         for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
1862                 if (i == 0) {
1863                         resize(c, m->wx, m->wy, mw, m->wh, False, 0);
1864                 } else {
1865                         if (c == vis_slave) {
1866                                 resize(c, m->wx + mw + GUTTER_PX, m->wy + TAB_HEIGHT + TAB_PAD, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1867                                 tab_count = &(tab_counts[1]);
1868                                 tab_top = m->wy + m->wh - TAB_HEIGHT;
1869                                 cur_tab = 0;
1870                         } else {
1871                                 // this function does not get called when focus changes
1872                                 // resize(c, m->wx + m->ww, m->wy, m->ww - mw, m->wh, False);
1873                                 resize(c, m->wx + mw + GUTTER_PX + right_width * cur_tab / (*tab_count), tab_top, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1874                                 cur_tab += 1;
1875                         }
1876                 }
1877                 base = c;
1878         }
1879 }
1880
1881 void
1882 togglebar(const Arg *arg) {
1883         selmon->showbar = !selmon->showbar;
1884         updatebarpos(selmon);
1885         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1886         arrange(selmon);
1887 }
1888
1889 void
1890 togglefloating(const Arg *arg) {
1891         if(!selmon->sel)
1892                 return;
1893         if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1894                 return;
1895         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1896         if(selmon->sel->isfloating)
1897                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1898                        selmon->sel->w, selmon->sel->h, False, 0);
1899         arrange(selmon);
1900 }
1901
1902 void
1903 toggletag(const Arg *arg) {
1904         unsigned int newtags;
1905
1906         if(!selmon->sel)
1907                 return;
1908         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1909         if(newtags) {
1910                 selmon->sel->tags = newtags;
1911                 focus(NULL);
1912                 arrange(selmon);
1913         }
1914 }
1915
1916 void
1917 toggleview(const Arg *arg) {
1918         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1919
1920         if(newtagset) {
1921                 selmon->tagset[selmon->seltags] = newtagset;
1922                 focus(NULL);
1923                 arrange(selmon);
1924         }
1925 }
1926
1927 void
1928 unfocus(Client *c, Bool setfocus) {
1929         if(!c)
1930                 return;
1931         grabbuttons(c, False);
1932         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->rgb);
1933         if(setfocus) {
1934                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1935                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1936         }
1937 }
1938
1939 void
1940 unmanage(Client *c, Bool destroyed) {
1941         Monitor *m = c->mon;
1942         XWindowChanges wc;
1943
1944         /* The server grab construct avoids race conditions. */
1945         detachstack(c);
1946         detach(c);
1947         if(!destroyed) {
1948                 wc.border_width = c->oldbw;
1949                 XGrabServer(dpy);
1950                 XSetErrorHandler(xerrordummy);
1951                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1952                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1953                 setclientstate(c, WithdrawnState);
1954                 XSync(dpy, False);
1955                 XSetErrorHandler(xerror);
1956                 XUngrabServer(dpy);
1957         }
1958         free(c);
1959         focus(selmon ? selmon->sel : NULL);
1960         updateclientlist();
1961         arrange(m);
1962 }
1963
1964 void
1965 unmapnotify(XEvent *e) {
1966         Client *c;
1967         XUnmapEvent *ev = &e->xunmap;
1968
1969         if((c = wintoclient(ev->window))) {
1970                 if(ev->send_event)
1971                         setclientstate(c, WithdrawnState);
1972                 else
1973                         unmanage(c, False);
1974         }
1975 }
1976
1977 void
1978 updatebars(void) {
1979         Monitor *m;
1980         XSetWindowAttributes wa = {
1981                 .override_redirect = True,
1982                 .background_pixmap = ParentRelative,
1983                 .event_mask = ButtonPressMask|ExposureMask
1984         };
1985         for(m = mons; m; m = m->next) {
1986                 if (m->barwin)
1987                         continue;
1988                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1989                                           CopyFromParent, DefaultVisual(dpy, screen),
1990                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1991                 XChangeProperty(dpy, root, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
1992                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
1993                 XChangeProperty(dpy, m->barwin, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
1994                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
1995                 XChangeProperty(dpy, m->barwin, netatom[NetWMName], XA_STRING, 8,
1996                                 PropModeReplace, (unsigned char *) "dwm", 3);
1997                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
1998                 XMapRaised(dpy, m->barwin);
1999         }
2000 }
2001
2002 void
2003 updatebarpos(Monitor *m) {
2004         m->wy = m->my;
2005         m->wh = m->mh;
2006         if(m->showbar) {
2007                 m->wh -= bh;
2008                 m->by = m->topbar ? m->wy : m->wy + m->wh;
2009                 m->wy = m->topbar ? m->wy + bh : m->wy;
2010         }
2011         else
2012                 m->by = -bh;
2013 }
2014
2015 void
2016 updateclientlist() {
2017         Client *c;
2018         Monitor *m;
2019
2020         XDeleteProperty(dpy, root, netatom[NetClientList]);
2021         for(m = mons; m; m = m->next)
2022                 for(c = m->clients; c; c = c->next)
2023                         XChangeProperty(dpy, root, netatom[NetClientList],
2024                                         XA_WINDOW, 32, PropModeAppend,
2025                                         (unsigned char *) &(c->win), 1);
2026 }
2027
2028 Bool
2029 updategeom(void) {
2030         Bool dirty = False;
2031
2032 #ifdef XINERAMA
2033         if(XineramaIsActive(dpy)) {
2034                 int i, j, n, nn;
2035                 Client *c;
2036                 Monitor *m;
2037                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2038                 XineramaScreenInfo *unique = NULL;
2039
2040                 for(n = 0, m = mons; m; m = m->next, n++);
2041                 /* only consider unique geometries as separate screens */
2042                 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
2043                         die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
2044                 for(i = 0, j = 0; i < nn; i++)
2045                         if(isuniquegeom(unique, j, &info[i]))
2046                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2047                 XFree(info);
2048                 nn = j;
2049                 if(n <= nn) {
2050                         for(i = 0; i < (nn - n); i++) { /* new monitors available */
2051                                 for(m = mons; m && m->next; m = m->next);
2052                                 if(m)
2053                                         m->next = createmon();
2054                                 else
2055                                         mons = createmon();
2056                         }
2057                         for(i = 0, m = mons; i < nn && m; m = m->next, i++)
2058                                 if(i >= n
2059                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
2060                                     || unique[i].width != m->mw || unique[i].height != m->mh))
2061                                 {
2062                                         dirty = True;
2063                                         m->num = i;
2064                                         m->mx = m->wx = unique[i].x_org;
2065                                         m->my = m->wy = unique[i].y_org;
2066                                         m->mw = m->ww = unique[i].width;
2067                                         m->mh = m->wh = unique[i].height;
2068                                         updatebarpos(m);
2069                                 }
2070                 }
2071                 else { /* less monitors available nn < n */
2072                         for(i = nn; i < n; i++) {
2073                                 for(m = mons; m && m->next; m = m->next);
2074                                 while(m->clients) {
2075                                         dirty = True;
2076                                         c = m->clients;
2077                                         m->clients = c->next;
2078                                         detachstack(c);
2079                                         c->mon = mons;
2080                                         attach(c);
2081                                         attachstack(c);
2082                                 }
2083                                 if(m == selmon)
2084                                         selmon = mons;
2085                                 cleanupmon(m);
2086                         }
2087                 }
2088                 free(unique);
2089         }
2090         else
2091 #endif /* XINERAMA */
2092         /* default monitor setup */
2093         {
2094                 if(!mons)
2095                         mons = createmon();
2096                 if(mons->mw != sw || mons->mh != sh) {
2097                         dirty = True;
2098                         mons->mw = mons->ww = sw;
2099                         mons->mh = mons->wh = sh;
2100                         updatebarpos(mons);
2101                 }
2102         }
2103         if(dirty) {
2104                 selmon = mons;
2105                 selmon = wintomon(root);
2106         }
2107         return dirty;
2108 }
2109
2110 void
2111 updatenumlockmask(void) {
2112         unsigned int i, j;
2113         XModifierKeymap *modmap;
2114
2115         numlockmask = 0;
2116         modmap = XGetModifierMapping(dpy);
2117         for(i = 0; i < 8; i++)
2118                 for(j = 0; j < modmap->max_keypermod; j++)
2119                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
2120                            == XKeysymToKeycode(dpy, XK_Num_Lock))
2121                                 numlockmask = (1 << i);
2122         XFreeModifiermap(modmap);
2123 }
2124
2125 void
2126 updatesizehints(Client *c) {
2127         long msize;
2128         XSizeHints size;
2129
2130         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
2131                 /* size is uninitialized, ensure that size.flags aren't used */
2132                 size.flags = PSize;
2133         if(size.flags & PBaseSize) {
2134                 c->basew = size.base_width;
2135                 c->baseh = size.base_height;
2136         }
2137         else if(size.flags & PMinSize) {
2138                 c->basew = size.min_width;
2139                 c->baseh = size.min_height;
2140         }
2141         else
2142                 c->basew = c->baseh = 0;
2143         if(size.flags & PResizeInc) {
2144                 c->incw = size.width_inc;
2145                 c->inch = size.height_inc;
2146         }
2147         else
2148                 c->incw = c->inch = 0;
2149         if(size.flags & PMaxSize) {
2150                 c->maxw = size.max_width;
2151                 c->maxh = size.max_height;
2152         }
2153         else
2154                 c->maxw = c->maxh = 0;
2155         if(size.flags & PMinSize) {
2156                 c->minw = size.min_width;
2157                 c->minh = size.min_height;
2158         }
2159         else if(size.flags & PBaseSize) {
2160                 c->minw = size.base_width;
2161                 c->minh = size.base_height;
2162         }
2163         else
2164                 c->minw = c->minh = 0;
2165         if(size.flags & PAspect) {
2166                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2167                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2168         }
2169         else
2170                 c->maxa = c->mina = 0.0;
2171         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
2172                      && c->maxw == c->minw && c->maxh == c->minh);
2173 }
2174
2175 void
2176 updatetitle(Client *c) {
2177         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2178                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2179         if(c->name[0] == '\0') /* hack to mark broken clients */
2180                 strcpy(c->name, broken);
2181 }
2182
2183 void
2184 updatestatus(void) {
2185         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2186                 strcpy(stext, "dwm-"VERSION);
2187         drawbar(selmon);
2188 }
2189
2190 void
2191 updatewindowtype(Client *c) {
2192         Atom state = getatomprop(c, netatom[NetWMState]);
2193         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2194
2195         if(state == netatom[NetWMFullscreen])
2196                 setfullscreen(c, True);
2197         if(wtype == netatom[NetWMWindowTypeDialog])
2198                 c->isfloating = True;
2199 }
2200
2201 void
2202 updatewmhints(Client *c) {
2203         XWMHints *wmh;
2204
2205         if((wmh = XGetWMHints(dpy, c->win))) {
2206                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2207                         wmh->flags &= ~XUrgencyHint;
2208                         XSetWMHints(dpy, c->win, wmh);
2209                 }
2210                 else
2211                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2212                 if(wmh->flags & InputHint)
2213                         c->neverfocus = !wmh->input;
2214                 else
2215                         c->neverfocus = False;
2216                 XFree(wmh);
2217         }
2218 }
2219
2220 void
2221 view(const Arg *arg) {
2222         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2223                 return;
2224         selmon->seltags ^= 1; /* toggle sel tagset */
2225         if(arg->ui & TAGMASK)
2226                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2227         focus(NULL);
2228         arrange(selmon);
2229 }
2230
2231 Client *
2232 wintoclient(Window w) {
2233         Client *c;
2234         Monitor *m;
2235
2236         for(m = mons; m; m = m->next)
2237                 for(c = m->clients; c; c = c->next)
2238                         if(c->win == w)
2239                                 return c;
2240         return NULL;
2241 }
2242
2243 Monitor *
2244 wintomon(Window w) {
2245         int x, y;
2246         Client *c;
2247         Monitor *m;
2248
2249         if(w == root && getrootptr(&x, &y))
2250                 return recttomon(x, y, 1, 1);
2251         for(m = mons; m; m = m->next)
2252                 if(w == m->barwin)
2253                         return m;
2254         if((c = wintoclient(w)))
2255                 return c->mon;
2256         return selmon;
2257 }
2258
2259 /* There's no way to check accesses to destroyed windows, thus those cases are
2260  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2261  * default error handler, which may call exit.  */
2262 int
2263 xerror(Display *dpy, XErrorEvent *ee) {
2264         if(ee->error_code == BadWindow
2265         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2266         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2267         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2268         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2269         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2270         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2271         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2272         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2273                 return 0;
2274         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2275                         ee->request_code, ee->error_code);
2276         return xerrorxlib(dpy, ee); /* may call exit */
2277 }
2278
2279 int
2280 xerrordummy(Display *dpy, XErrorEvent *ee) {
2281         return 0;
2282 }
2283
2284 /* Startup Error handler to check if another window manager
2285  * is already running. */
2286 int
2287 xerrorstart(Display *dpy, XErrorEvent *ee) {
2288         die("dwm: another window manager is already running\n");
2289         return -1;
2290 }
2291
2292 void
2293 zoom(const Arg *arg) {
2294         Client *c = selmon->sel;
2295
2296         if(!selmon->lt[selmon->sellt]->arrange
2297         || (selmon->sel && selmon->sel->isfloating))
2298                 return;
2299         if(c == nexttiled(selmon->clients))
2300                 if(!c || !(c = nexttiled(c->next)))
2301                         return;
2302         pop(c);
2303 }
2304
2305 int
2306 main(int argc, char *argv[]) {
2307         if(argc == 2 && !strcmp("-v", argv[1]))
2308                 die("dwm-"VERSION", © 2006-2014 dwm engineers, see LICENSE for details\n");
2309         else if(argc != 1)
2310                 die("usage: dwm [-v]\n");
2311         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2312                 fputs("warning: no locale support\n", stderr);
2313         if(!(dpy = XOpenDisplay(NULL)))
2314                 die("dwm: cannot open display\n");
2315         checkotherwm();
2316         setup();
2317         scan();
2318         run();
2319         cleanup();
2320         XCloseDisplay(dpy);
2321         return EXIT_SUCCESS;
2322 }