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/Xatom.h>
  36 #include <X11/Xlib.h>
  37 #include <X11/Xproto.h>
  38 #include <X11/Xutil.h>
  39 #ifdef XINERAMA
  40 #include <X11/extensions/Xinerama.h>
  41 #endif /* XINERAMA */
  42
  43 #include "drw.h"
  44 #include "util.h"
  45
  46 /* macros */
  47 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
  48 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
  49 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
  50                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
  51 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
  52 #define LENGTH(X)               (sizeof X / sizeof X[0])
  53 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
  54 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
  55 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
  56 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
  57 #define TEXTW(X)                (drw_font_getexts_width(drw->font, X, strlen(X)) + drw->font->h)
  58
  59 /* enums */
  60 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
  61 enum { SchemeNorm, SchemeSel, SchemeLast }; /* color schemes */
  62 enum { NetSupported, NetWMName, NetWMState,
  63        NetWMFullscreen, NetWMWindowOpacity, NetActiveWindow, NetWMWindowType,
  64        NetWMWindowTypeDialog, NetClientList, NetSupportingWMCheck, NetLast }; /* EWMH atoms */
  65 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
  66 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
  67        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
  68
  69 typedef union {
  70         int i;
  71         unsigned int ui;
  72         float f;
  73         const void *v;
  74 } Arg;
  75
  76 typedef struct {
  77         unsigned int click;
  78         unsigned int mask;
  79         unsigned int button;
  80         void (*func)(const Arg *arg);
  81         const Arg arg;
  82 } Button;
  83
  84 typedef struct Monitor Monitor;
  85 typedef struct Client Client;
  86 struct Client {
  87         char name[256];
  88         float mina, maxa;
  89         int x, y, w, h;
  90         int oldx, oldy, oldw, oldh;
  91         int basew, baseh, incw, inch, maxw, maxh, minw, minh;
  92         int bw, oldbw;
  93         int opacity;
  94         unsigned int tags;
  95         Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, screen_hog;
  96         Client *next;
  97         Client *snext;
  98         Monitor *mon;
  99         Window win;
 100 };
 101
 102 typedef struct {
 103         unsigned int mod;
 104         KeySym keysym;
 105         void (*func)(const Arg *);
 106         const Arg arg;
 107 } Key;
 108
 109 typedef struct {
 110         const char *symbol;
 111         void (*arrange)(Monitor *);
 112 } Layout;
 113
 114 struct Monitor {
 115         char ltsymbol[16];
 116         float mfact;
 117         int nmaster;
 118         int num;
 119         int by;               /* bar geometry */
 120         int mx, my, mw, mh;   /* screen size */
 121         int wx, wy, ww, wh;   /* window area  */
 122         unsigned int seltags;
 123         unsigned int sellt;
 124         unsigned int tagset[2];
 125         Bool showbar;
 126         Bool topbar;
 127         Client *clients;
 128         Client *sel;
 129         Client *stack;
 130         Monitor *next;
 131         Window barwin;
 132         const Layout *lt[2];
 133 };
 134
 135 typedef struct {
 136         const char *class;
 137         const char *instance;
 138         const char *title;
 139         unsigned int tags;
 140         Bool isfloating;
 141         Bool screen_hog;
 142         int monitor;
 143 } Rule;
 144
 145 /* function declarations */
 146 static void applyrules(Client *c);
 147 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
 148 static void arrange(Monitor *m);
 149 static void arrangemon(Monitor *m);
 150 static void attach_as_master(Client *c);
 151 static void attach(Client *c);
 152 static void attachstack(Client *c);
 153 static void buttonpress(XEvent *e);
 154 static void checkotherwm(void);
 155 static void cleanup(void);
 156 static void cleanupmon(Monitor *mon);
 157 static void clearurgent(Client *c);
 158 static void clientmessage(XEvent *e);
 159 static void configure(Client *c);
 160 static void configurenotify(XEvent *e);
 161 static void configurerequest(XEvent *e);
 162 static Monitor *createmon(void);
 163 static void destroynotify(XEvent *e);
 164 static void detach(Client *c);
 165 static void detachstack(Client *c);
 166 static Monitor *dirtomon(int dir);
 167 static void drawbar(Monitor *m);
 168 static void drawbars(void);
 169 static void enternotify(XEvent *e);
 170 static void expose(XEvent *e);
 171 static void focus(Client *c);
 172 static void focusin(XEvent *e);
 173 static void focusmon(const Arg *arg);
 174 static void focusstack(const Arg *arg);
 175 static Bool getrootptr(int *x, int *y);
 176 static long getstate(Window w);
 177 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 178 static void grabbuttons(Client *c, Bool focused);
 179 static void grabkeys(void);
 180 static void incnmaster(const Arg *arg);
 181 static void keypress(XEvent *e);
 182 static void killclient(const Arg *arg);
 183 static void manage(Window w, XWindowAttributes *wa);
 184 static void mappingnotify(XEvent *e);
 185 static void maprequest(XEvent *e);
 186 static void monocle(Monitor *m);
 187 static void motionnotify(XEvent *e);
 188 static void movemouse(const Arg *arg);
 189 static Client *nexttiled(Client *c);
 190 static Client *snexttiled(Client *c);
 191 static Client *nextvisible(Client *c);
 192 static void pop(Client *);
 193 static void propertynotify(XEvent *e);
 194 static void quit(const Arg *arg);
 195 static Monitor *recttomon(int x, int y, int w, int h);
 196 static void resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base);
 197 static void resizeclient(Client *c, int x, int y, int w, int h, Client *base);
 198 static void resizemouse(const Arg *arg);
 199 static void restack(Monitor *m);
 200 static void run(void);
 201 static void scan(void);
 202 static Bool sendevent(Client *c, Atom proto);
 203 static void send_keycode(KeyCode key, unsigned int state);
 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 typedef struct {
 246         KeyCode keycode;
 247         unsigned int state;
 248 } BufferedKey;
 249 static BufferedKey key_buffer[200];
 250 static int key_buffer_len = 0;
 251 static Bool key_buffering = False;
 252 static const char broken[] = "broken";
 253 static char stext[256];
 254 static int screen;
 255 static int sw, sh;           /* X display screen geometry width, height */
 256 static int bh, blw = 0;      /* bar geometry */
 257 static int (*xerrorxlib)(Display *, XErrorEvent *);
 258 static unsigned int numlockmask = 0;
 259 static void (*handler[LASTEvent]) (XEvent *) = {
 260         [ButtonPress] = buttonpress,
 261         [ClientMessage] = clientmessage,
 262         [ConfigureRequest] = configurerequest,
 263         [ConfigureNotify] = configurenotify,
 264         [DestroyNotify] = destroynotify,
 265         [EnterNotify] = enternotify,
 266         [Expose] = expose,
 267         [FocusIn] = focusin,
 268         [KeyPress] = keypress,
 269         [MappingNotify] = mappingnotify,
 270         [MapRequest] = maprequest,
 271         [MotionNotify] = motionnotify,
 272         [PropertyNotify] = propertynotify,
 273         [UnmapNotify] = unmapnotify
 274 };
 275 static Atom wmatom[WMLast], netatom[NetLast];
 276 static Bool running = True;
 277 static Cur *cursor[CurLast];
 278 static ClrScheme scheme[SchemeLast];
 279 static Display *dpy;
 280 static Drw *drw;
 281 static Fnt *fnt;
 282 static Monitor *mons, *selmon;
 283 static Window root;
 284
 285 // unfocused windows get transparent (feature)
 286 static const unsigned long opacities[] = { 0, 0xbfffffff, 0x00000000 }; // first unused
 287 static void window_set_opaque(Client *c);
 288 static void window_set_translucent(Client *c);
 289 static void window_set_invisible(Client *c);
 290 static void window_set_opacity(Client *c, int opacity_index);
 291 static void update_window_opacities(Monitor *m);
 292 void
 293 window_set_opacity(Client *c, int opacity_index) {
 294         if (c->opacity == opacity_index) {
 295                 return;
 296         }
 297         c->opacity = opacity_index;
 298         if (opacity_index == 0) {
 299                 XDeleteProperty(dpy, c->win, netatom[NetWMWindowOpacity]);
 300         } else {
 301                 XChangeProperty(dpy, c->win, netatom[NetWMWindowOpacity], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)(&opacities[opacity_index]), 1);
 302         }
 303 }
 304 void
 305 window_set_opaque(Client *c) {
 306         window_set_opacity(c, 0);
 307 }
 308 void
 309 window_set_translucent(Client *c) {
 310         window_set_opacity(c, 1);
 311 }
 312 void
 313 window_set_invisible(Client *c) {
 314         window_set_opacity(c, 2);
 315 }
 316 void
 317 update_window_opacities(Monitor *m) {
 318         Client *master, *slave, *c;
 319         Bool selection_floating = False;
 320         slave = master = nexttiled(m->clients);
 321         if (master) slave = nexttiled(master->next);
 322         if (m->sel && m->sel != master) {
 323                 if (nexttiled(m->sel) == m->sel) // if selection is tiled
 324                         slave = m->sel;
 325                 else
 326                         selection_floating = True;
 327         }
 328         for (c = m->clients; c; c = c->next) {
 329                 if (ISVISIBLE(c)) {
 330                         if (c->isfloating || c == m->sel || (selection_floating && (c == master || c == slave))) {
 331                                 window_set_opaque(c);
 332                         } else if (c == master || c == slave) {
 333                                 window_set_translucent(c);
 334                         } else {
 335                                 window_set_opaque(c);
 336                         }
 337                 }
 338         }
 339 }
 340
 341
 342 /* configuration, allows nested code to access above variables */
 343 #include "config.h"
 344
 345 /* compile-time check if all tags fit into an unsigned int bit array. */
 346 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 347
 348 /* function implementations */
 349 void
 350 applyrules(Client *c) {
 351         const char *class, *instance;
 352         unsigned int i;
 353         const Rule *r;
 354         Monitor *m;
 355         XClassHint ch = { NULL, NULL };
 356
 357         /* rule matching */
 358         c->isfloating = c->tags = c->screen_hog = 0;
 359         XGetClassHint(dpy, c->win, &ch);
 360         class    = ch.res_class ? ch.res_class : broken;
 361         instance = ch.res_name  ? ch.res_name  : broken;
 362
 363         for(i = 0; i < LENGTH(rules); i++) {
 364                 r = &rules[i];
 365                 if((!r->title || c->name == strstr(c->name, r->title))
 366                 && (!r->class || strstr(class, r->class))
 367                 && (!r->instance || strstr(instance, r->instance)))
 368                 {
 369                         c->isfloating = r->isfloating;
 370                         if(r->isfloating) {
 371                                 c->x = -1; c->y = -2; // secret code for centered
 372                         }
 373                         c->tags |= r->tags;
 374                         c->screen_hog = r->screen_hog;
 375                         for(m = mons; m && m->num != r->monitor; m = m->next);
 376                         if(m)
 377                                 c->mon = m;
 378                 }
 379         }
 380         if(ch.res_class)
 381                 XFree(ch.res_class);
 382         if(ch.res_name)
 383                 XFree(ch.res_name);
 384         c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 385 }
 386
 387 Bool
 388 applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
 389         Bool baseismin;
 390         // Monitor *m = c->mon;
 391
 392         /* set minimum possible */
 393         *w = MAX(1, *w);
 394         *h = MAX(1, *h);
 395         if(interact) {
 396                 if(*x > sw)
 397                         *x = sw - WIDTH(c);
 398                 if(*y > sh)
 399                         *y = sh - HEIGHT(c);
 400                 if(*x + *w + 2 * c->bw < 0)
 401                         *x = 0;
 402                 if(*y + *h + 2 * c->bw < 0)
 403                         *y = 0;
 404         }
 405         // jason: let windows be offscreen
 406         //else {
 407         //      if(*x >= m->wx + m->ww)
 408         //              *x = m->wx + m->ww - WIDTH(c);
 409         //      if(*y >= m->wy + m->wh)
 410         //              *y = m->wy + m->wh - HEIGHT(c);
 411         //      if(*x + *w + 2 * c->bw <= m->wx)
 412         //              *x = m->wx;
 413         //      if(*y + *h + 2 * c->bw <= m->wy)
 414         //              *y = m->wy;
 415         //}
 416         if(*h < bh)
 417                 *h = bh;
 418         if(*w < bh)
 419                 *w = bh;
 420         if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
 421                 /* see last two sentences in ICCCM 4.1.2.3 */
 422                 baseismin = c->basew == c->minw && c->baseh == c->minh;
 423                 if(!baseismin) { /* temporarily remove base dimensions */
 424                         *w -= c->basew;
 425                         *h -= c->baseh;
 426                 }
 427                 /* adjust for aspect limits */
 428                 if(c->mina > 0 && c->maxa > 0) {
 429                         if(c->maxa < (float)*w / *h)
 430                                 *w = *h * c->maxa + 0.5;
 431                         else if(c->mina < (float)*h / *w)
 432                                 *h = *w * c->mina + 0.5;
 433                 }
 434                 if(baseismin) { /* increment calculation requires this */
 435                         *w -= c->basew;
 436                         *h -= c->baseh;
 437                 }
 438                 /* adjust for increment value */
 439                 if(c->incw)
 440                         *w -= *w % c->incw;
 441                 if(c->inch)
 442                         *h -= *h % c->inch;
 443                 /* restore base dimensions */
 444                 *w = MAX(*w + c->basew, c->minw);
 445                 *h = MAX(*h + c->baseh, c->minh);
 446                 if(c->maxw)
 447                         *w = MIN(*w, c->maxw);
 448                 if(c->maxh)
 449                         *h = MIN(*h, c->maxh);
 450         }
 451         return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
 452 }
 453
 454 void
 455 arrange(Monitor *m) {
 456         if(m)
 457                 showhide(m->stack);
 458         else for(m = mons; m; m = m->next)
 459                 showhide(m->stack);
 460         if(m) {
 461                 arrangemon(m);
 462                 restack(m);
 463         } else for(m = mons; m; m = m->next)
 464                 arrangemon(m);
 465 }
 466
 467 void
 468 arrangemon(Monitor *m) {
 469         strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
 470         if(m->lt[m->sellt]->arrange)
 471                 m->lt[m->sellt]->arrange(m);
 472 }
 473
 474 void
 475 attach_as_master(Client *c) {
 476         c->next = c->mon->clients;
 477         c->mon->clients = c;
 478 }
 479 void
 480 attach(Client *c) {
 481         if (c->mon->sel) {
 482                 c->next = c->mon->sel->next;
 483                 c->mon->sel->next = c;
 484         } else {
 485                 attach_as_master(c);
 486         }
 487 }
 488
 489 void
 490 attachstack(Client *c) {
 491         c->snext = c->mon->stack;
 492         c->mon->stack = c;
 493 }
 494
 495 void
 496 buttonpress(XEvent *e) {
 497         unsigned int i, click;
 498         Arg arg = {0};
 499         Client *c;
 500         Monitor *m;
 501         XButtonPressedEvent *ev = &e->xbutton;
 502
 503         click = ClkRootWin;
 504         /* focus monitor if necessary */
 505         if((m = wintomon(ev->window)) && m != selmon) {
 506                 unfocus(selmon->sel, True);
 507                 selmon = m;
 508                 focus(NULL);
 509         }
 510         if(ev->window == selmon->barwin) {
 511                 return;
 512         }
 513         else if((c = wintoclient(ev->window))) {
 514                 focus(c);
 515                 click = ClkClientWin;
 516         }
 517         for(i = 0; i < LENGTH(buttons); i++)
 518                 if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 519                 && CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
 520                         buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 521 }
 522
 523 void
 524 checkotherwm(void) {
 525         xerrorxlib = XSetErrorHandler(xerrorstart);
 526         /* this causes an error if some other window manager is running */
 527         XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
 528         XSync(dpy, False);
 529         XSetErrorHandler(xerror);
 530         XSync(dpy, False);
 531 }
 532
 533 void
 534 cleanup(void) {
 535         Arg a = {.ui = ~0};
 536         Layout foo = { "", NULL };
 537         Monitor *m;
 538
 539         view(&a);
 540         selmon->lt[selmon->sellt] = &foo;
 541         for(m = mons; m; m = m->next)
 542                 while(m->stack)
 543                         unmanage(m->stack, False);
 544         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 545         while(mons)
 546                 cleanupmon(mons);
 547         drw_cur_free(drw, cursor[CurNormal]);
 548         drw_cur_free(drw, cursor[CurResize]);
 549         drw_cur_free(drw, cursor[CurMove]);
 550         drw_font_free(dpy, fnt);
 551         drw_clr_free(scheme[SchemeNorm].border);
 552         drw_clr_free(scheme[SchemeNorm].bg);
 553         drw_clr_free(scheme[SchemeNorm].fg);
 554         drw_clr_free(scheme[SchemeSel].border);
 555         drw_clr_free(scheme[SchemeSel].bg);
 556         drw_clr_free(scheme[SchemeSel].fg);
 557         drw_free(drw);
 558         XSync(dpy, False);
 559         XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
 560         XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 561 }
 562
 563 void
 564 cleanupmon(Monitor *mon) {
 565         Monitor *m;
 566
 567         if(mon == mons)
 568                 mons = mons->next;
 569         else {
 570                 for(m = mons; m && m->next != mon; m = m->next);
 571                 m->next = mon->next;
 572         }
 573         XUnmapWindow(dpy, mon->barwin);
 574         XDestroyWindow(dpy, mon->barwin);
 575         free(mon);
 576 }
 577
 578 void
 579 clearurgent(Client *c) {
 580         XWMHints *wmh;
 581
 582         c->isurgent = False;
 583         if(!(wmh = XGetWMHints(dpy, c->win)))
 584                 return;
 585         wmh->flags &= ~XUrgencyHint;
 586         XSetWMHints(dpy, c->win, wmh);
 587         XFree(wmh);
 588 }
 589
 590 void
 591 clientmessage(XEvent *e) {
 592         XClientMessageEvent *cme = &e->xclient;
 593         Client *c = wintoclient(cme->window);
 594
 595         if(!c)
 596                 return;
 597         if(cme->message_type == netatom[NetWMState]) {
 598                 if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 599                         setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
 600                                       || (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
 601         }
 602         else if(cme->message_type == netatom[NetActiveWindow]) {
 603                 // Jason added this so apps can't steal focus:
 604                 return;
 605                 if(!ISVISIBLE(c)) {
 606                         c->mon->seltags ^= 1;
 607                         c->mon->tagset[c->mon->seltags] = c->tags;
 608                 }
 609                 pop(c);
 610         }
 611 }
 612
 613 void
 614 configure(Client *c) {
 615         XConfigureEvent ce;
 616
 617         ce.type = ConfigureNotify;
 618         ce.display = dpy;
 619         ce.event = c->win;
 620         ce.window = c->win;
 621         ce.x = c->x;
 622         ce.y = c->y;
 623         ce.width = c->w;
 624         ce.height = c->h;
 625         ce.border_width = c->bw;
 626         ce.above = None;
 627         ce.override_redirect = False;
 628         XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
 629 }
 630
 631 void
 632 configurenotify(XEvent *e) {
 633         Monitor *m;
 634         XConfigureEvent *ev = &e->xconfigure;
 635         Bool dirty;
 636
 637         // TODO: updategeom handling sucks, needs to be simplified
 638         if(ev->window == root) {
 639                 dirty = (sw != ev->width || sh != ev->height);
 640                 sw = ev->width;
 641                 sh = ev->height;
 642                 if(updategeom() || dirty) {
 643                         drw_resize(drw, sw, bh);
 644                         updatebars();
 645                         for(m = mons; m; m = m->next)
 646                                 XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 647                         focus(NULL);
 648                         arrange(NULL);
 649                 }
 650         }
 651 }
 652
 653 void
 654 configurerequest(XEvent *e) {
 655         Client *c;
 656         Monitor *m;
 657         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 658         XWindowChanges wc;
 659
 660         if((c = wintoclient(ev->window))) {
 661                 if(ev->value_mask & CWBorderWidth)
 662                         c->bw = ev->border_width;
 663                 else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
 664                         m = c->mon;
 665                         if(ev->value_mask & CWX) {
 666                                 c->oldx = c->x;
 667                                 c->x = m->mx + ev->x;
 668                         }
 669                         if(ev->value_mask & CWY) {
 670                                 c->oldy = c->y;
 671                                 c->y = m->my + ev->y;
 672                         }
 673                         if(ev->value_mask & CWWidth) {
 674                                 c->oldw = c->w;
 675                                 c->w = ev->width;
 676                         }
 677                         if(ev->value_mask & CWHeight) {
 678                                 c->oldh = c->h;
 679                                 c->h = ev->height;
 680                         }
 681                         if((c->x + c->w) > m->mx + m->mw && c->isfloating)
 682                                 c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
 683                         if((c->y + c->h) > m->my + m->mh && c->isfloating)
 684                                 c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 685                         if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 686                                 configure(c);
 687                         if(ISVISIBLE(c))
 688                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 689                 }
 690                 else
 691                         configure(c);
 692         }
 693         else {
 694                 wc.x = ev->x;
 695                 wc.y = ev->y;
 696                 wc.width = ev->width;
 697                 wc.height = ev->height;
 698                 wc.border_width = ev->border_width;
 699                 wc.sibling = ev->above;
 700                 wc.stack_mode = ev->detail;
 701                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 702         }
 703         XSync(dpy, False);
 704 }
 705
 706 Monitor *
 707 createmon(void) {
 708         Monitor *m;
 709
 710         if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
 711                 die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
 712         m->tagset[0] = m->tagset[1] = 1;
 713         m->mfact = mfact;
 714         m->nmaster = nmaster;
 715         m->showbar = showbar;
 716         m->topbar = topbar;
 717         m->lt[0] = &layouts[0];
 718         m->lt[1] = &layouts[1 % LENGTH(layouts)];
 719         strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
 720         return m;
 721 }
 722
 723 void
 724 destroynotify(XEvent *e) {
 725         Client *c;
 726         XDestroyWindowEvent *ev = &e->xdestroywindow;
 727
 728         if((c = wintoclient(ev->window)))
 729                 unmanage(c, True);
 730 }
 731
 732 void
 733 detach(Client *c) {
 734         Client **tc;
 735
 736         for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
 737         *tc = c->next;
 738 }
 739
 740 // NOTE: the stack is for z-order and most-recently-focused
 741 // only mon->clients determines position in visible layout
 742 void
 743 detachstack(Client *c) {
 744         Client *prev = NULL, *next_sel = NULL, *i;
 745         for(i = c->mon->stack; i && i != c; i = i->snext) {
 746                 prev = i;
 747         }
 748         if(c == c->mon->sel) {
 749                 // find last visible window before c
 750                 // WARNING if you detach() before detachstack() this will select last visible window
 751                 for(i = nextvisible(c->mon->clients); i && i != c; i = nextvisible(i->next))
 752                         next_sel = i;
 753                 // failing that, find first visible window (besides c)
 754                 if (!next_sel) {
 755                         for(i = nextvisible(c->mon->clients); i && i == c; i = nextvisible(i->next));
 756                         if (i != c)
 757                                 next_sel = i;
 758                 }
 759                 c->mon->sel = next_sel;
 760         }
 761         if (prev) {
 762                 prev->snext = c->snext;
 763         } else {
 764                 c->mon->stack = c->snext;
 765         }
 766 }
 767
 768 Monitor *
 769 dirtomon(int dir) {
 770         Monitor *m = NULL;
 771
 772         if(dir > 0) {
 773                 if(!(m = selmon->next))
 774                         m = mons;
 775         }
 776         else if(selmon == mons)
 777                 for(m = mons; m->next; m = m->next);
 778         else
 779                 for(m = mons; m->next != selmon; m = m->next);
 780         return m;
 781 }
 782
 783 void
 784 drawbar(Monitor *m) {
 785         int x, xx, w;
 786         unsigned int i, occ = 0, urg = 0;
 787         Client *c;
 788
 789         for(c = m->clients; c; c = c->next) {
 790                 occ |= c->tags;
 791                 if(c->isurgent)
 792                         urg |= c->tags;
 793         }
 794         x = 0;
 795         for(i = 0; i < LENGTH(tags); i++) {
 796                 w = TEXTW(tags[i]);
 797                 drw_setscheme(drw, m->tagset[m->seltags] & 1 << i ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 798                 drw_text(drw, x, 0, w, bh, tags[i], urg & 1 << i);
 799                 drw_rect(drw, x, 0, w, bh, m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
 800                            occ & 1 << i, urg & 1 << i);
 801                 x += w;
 802         }
 803         w = blw = TEXTW(m->ltsymbol);
 804         drw_setscheme(drw, &scheme[SchemeNorm]);
 805         drw_text(drw, x, 0, w, bh, m->ltsymbol, 0);
 806         x += w;
 807         xx = x;
 808         if(m == selmon) { /* status is only drawn on selected monitor */
 809                 w = TEXTW(stext);
 810                 x = m->ww - w;
 811                 if(x < xx) {
 812                         x = xx;
 813                         w = m->ww - xx;
 814                 }
 815                 drw_text(drw, x, 0, w, bh, stext, 0);
 816         }
 817         else
 818                 x = m->ww;
 819         if((w = x - xx) > bh) {
 820                 x = xx;
 821                 if(m->sel) {
 822                         drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 823                         drw_text(drw, x, 0, w, bh, m->sel->name, 0);
 824                         drw_rect(drw, x, 0, w, bh, m->sel->isfixed, m->sel->isfloating, 0);
 825                 }
 826                 else {
 827                         drw_setscheme(drw, &scheme[SchemeNorm]);
 828                         drw_text(drw, x, 0, w, bh, NULL, 0);
 829                 }
 830         }
 831         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 832 }
 833
 834 void
 835 drawbars(void) {
 836         Monitor *m;
 837
 838         for(m = mons; m; m = m->next)
 839                 drawbar(m);
 840 }
 841
 842 void
 843 enternotify(XEvent *e) {
 844         Client *c;
 845         Monitor *m;
 846         XCrossingEvent *ev = &e->xcrossing;
 847
 848         return; // jason: added to stop mouse focus
 849
 850         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 851                 return;
 852         c = wintoclient(ev->window);
 853         m = c ? c->mon : wintomon(ev->window);
 854         if(m != selmon) {
 855                 unfocus(selmon->sel, True);
 856                 selmon = m;
 857         }
 858         else if(!c || c == selmon->sel)
 859                 return;
 860         focus(c);
 861 }
 862
 863 void
 864 expose(XEvent *e) {
 865         Monitor *m;
 866         XExposeEvent *ev = &e->xexpose;
 867
 868         if(ev->count == 0 && (m = wintomon(ev->window)))
 869                 drawbar(m);
 870 }
 871
 872 void
 873 focus(Client *c) {
 874         if(!c || !ISVISIBLE(c))
 875                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 876         /* was if(selmon->sel) */
 877         if(selmon->sel && selmon->sel != c)
 878                 unfocus(selmon->sel, False);
 879         if(c) {
 880                 if(c->mon != selmon)
 881                         selmon = c->mon;
 882                 if(c->isurgent)
 883                         clearurgent(c);
 884                 detachstack(c);
 885                 attachstack(c);
 886                 grabbuttons(c, True);
 887                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->rgb);
 888                 setfocus(c);
 889         }
 890         else {
 891                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 892                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 893         }
 894         selmon->sel = c;
 895         arrange(selmon);
 896         update_window_opacities(selmon);
 897         drawbars();
 898         if(c && (!root || (c->win!=root)) )
 899                 window_set_opaque(c);
 900 }
 901
 902 void
 903 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 904         XFocusChangeEvent *ev = &e->xfocus;
 905
 906         if(selmon->sel && ev->window != selmon->sel->win)
 907                 setfocus(selmon->sel);
 908 }
 909
 910 void
 911 focusmon(const Arg *arg) {
 912         Monitor *m;
 913
 914         if(!mons->next)
 915                 return;
 916         if((m = dirtomon(arg->i)) == selmon)
 917                 return;
 918         unfocus(selmon->sel, False); /* s/True/False/ fixes input focus issues
 919                                         in gedit and anjuta */
 920         selmon = m;
 921         focus(NULL);
 922 }
 923
 924 void
 925 focusstack(const Arg *arg) {
 926         Client *c = NULL, *i;
 927
 928         if(!selmon->sel)
 929                 return;
 930         if(arg->i == 0) {
 931                 for(i = selmon->clients; i != selmon->sel; i = i->next) {
 932                         if(ISVISIBLE(i)) {
 933                                 c = i;
 934                                 break;
 935                         }
 936                 }
 937         } else if(arg->i > 0) {
 938                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 939                 if(!c)
 940                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 941         }
 942         else {
 943                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 944                         if(ISVISIBLE(i))
 945                                 c = i;
 946                 if(!c)
 947                         for(; i; i = i->next)
 948                                 if(ISVISIBLE(i))
 949                                         c = i;
 950         }
 951         if(c) {
 952                 focus(c);
 953                 restack(selmon);
 954         }
 955 }
 956
 957 Atom
 958 getatomprop(Client *c, Atom prop) {
 959         int di;
 960         unsigned long dl;
 961         unsigned char *p = NULL;
 962         Atom da, atom = None;
 963
 964         if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 965                               &da, &di, &dl, &dl, &p) == Success && p) {
 966                 atom = *(Atom *)p;
 967                 XFree(p);
 968         }
 969         return atom;
 970 }
 971
 972 Bool
 973 getrootptr(int *x, int *y) {
 974         int di;
 975         unsigned int dui;
 976         Window dummy;
 977
 978         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 979 }
 980
 981 long
 982 getstate(Window w) {
 983         int format;
 984         long result = -1;
 985         unsigned char *p = NULL;
 986         unsigned long n, extra;
 987         Atom real;
 988
 989         if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
 990                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
 991                 return -1;
 992         if(n != 0)
 993                 result = *p;
 994         XFree(p);
 995         return result;
 996 }
 997
 998 Bool
 999 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
1000         char **list = NULL;
1001         int n;
1002         XTextProperty name;
1003
1004         if(!text || size == 0)
1005                 return False;
1006         text[0] = '\0';
1007         XGetTextProperty(dpy, w, &name, atom);
1008         if(!name.nitems)
1009                 return False;
1010         if(name.encoding == XA_STRING)
1011                 strncpy(text, (char *)name.value, size - 1);
1012         else {
1013                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1014                         strncpy(text, *list, size - 1);
1015                         XFreeStringList(list);
1016                 }
1017         }
1018         text[size - 1] = '\0';
1019         XFree(name.value);
1020         return True;
1021 }
1022
1023 void
1024 grabbuttons(Client *c, Bool focused) {
1025         updatenumlockmask();
1026         {
1027                 unsigned int i, j;
1028                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1029                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1030                 if(focused) {
1031                         for(i = 0; i < LENGTH(buttons); i++)
1032                                 if(buttons[i].click == ClkClientWin)
1033                                         for(j = 0; j < LENGTH(modifiers); j++)
1034                                                 XGrabButton(dpy, buttons[i].button,
1035                                                             buttons[i].mask | modifiers[j],
1036                                                             c->win, False, BUTTONMASK,
1037                                                             GrabModeAsync, GrabModeSync, None, None);
1038                 }
1039                 else
1040                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1041                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1042         }
1043 }
1044
1045 void
1046 grabkeys(void) {
1047         updatenumlockmask();
1048         //XUngrabKey(dpy, AnyKey, AnyModifier, root);
1049         XGrabKey(dpy, AnyKey, AnyModifier, root, True, GrabModeAsync, GrabModeAsync);
1050 }
1051
1052 void
1053 incnmaster(const Arg *arg) {
1054         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1055         arrange(selmon);
1056 }
1057
1058 #ifdef XINERAMA
1059 static Bool
1060 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1061         while(n--)
1062                 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1063                 && unique[n].width == info->width && unique[n].height == info->height)
1064                         return False;
1065         return True;
1066 }
1067 #endif /* XINERAMA */
1068
1069 void
1070 send_keycode(KeyCode key, unsigned int state) {
1071         XKeyEvent event;
1072         if(!selmon->sel) {
1073                 return;
1074         }
1075         event.display = dpy;
1076         event.root = root;
1077         event.window = selmon->sel->win;
1078         event.subwindow = None;
1079         event.same_screen = True;
1080         event.x = 1;
1081         event.y = 1;
1082         event.x_root = 1;
1083         event.y_root = 1;
1084         event.time = CurrentTime;
1085         event.state = state; // modifiers
1086         event.keycode = key;
1087         event.type = KeyPress;
1088         XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);
1089         event.type = KeyRelease;
1090         XSendEvent(event.display, event.window, True, KeyPressMask, (XEvent *)&event);
1091 }
1092
1093 void
1094 keypress(XEvent *e) {
1095         unsigned int i;
1096         KeySym keysym;
1097         XKeyEvent *ev;
1098         Bool called = False;
1099
1100         ev = &e->xkey;
1101         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1102         for(i = 0; i < LENGTH(keys); i++)
1103                 if(keysym == keys[i].keysym
1104                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1105                 && keys[i].func) {
1106                         keys[i].func(&(keys[i].arg));
1107                         called = True;
1108                 }
1109         if(!called) {
1110                 if(key_buffering) {
1111                         if(key_buffer_len == LENGTH(key_buffer)) {
1112                                 // buffer full, bail
1113                                 key_buffer_len = 0;
1114                                 key_buffering = False;
1115                         } else {
1116                                 key_buffer[key_buffer_len].keycode = (KeyCode)ev->keycode;
1117                                 key_buffer[key_buffer_len].state = (KeyCode)ev->state;
1118                                 key_buffer_len += 1;
1119                         }
1120                 } else {
1121                         send_keycode(ev->keycode, ev->state);
1122                 }
1123         }
1124 }
1125
1126 void
1127 killclient(const Arg *arg) {
1128         if(!selmon->sel)
1129                 return;
1130         if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1131                 XGrabServer(dpy);
1132                 XSetErrorHandler(xerrordummy);
1133                 XSetCloseDownMode(dpy, DestroyAll);
1134                 XKillClient(dpy, selmon->sel->win);
1135                 XSync(dpy, False);
1136                 XSetErrorHandler(xerror);
1137                 XUngrabServer(dpy);
1138         }
1139 }
1140
1141 void
1142 manage(Window w, XWindowAttributes *wa) {
1143         Client *c, *t = NULL;
1144         Window trans = None;
1145         XWindowChanges wc;
1146         int i;
1147
1148         if(!(c = calloc(1, sizeof(Client))))
1149                 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1150         c->opacity = -1; // who knows
1151         c->win = w;
1152         updatetitle(c);
1153         if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1154                 c->mon = t->mon;
1155                 c->tags = t->tags;
1156         }
1157         else {
1158                 c->mon = selmon;
1159                 applyrules(c);
1160         }
1161         /* geometry */
1162         if(c->x == -1 && c->y == -2) { // secret code for centered
1163                 c->x = c->oldx = (c->mon->ww - wa->width) / 2;
1164                 c->y = c->oldy = (c->mon->wh - wa->height) / 2;
1165         } else {
1166                 c->x = c->oldx = wa->x;
1167                 c->y = c->oldy = wa->y;
1168         }
1169         c->w = c->oldw = wa->width;
1170         c->h = c->oldh = wa->height;
1171         c->oldbw = wa->border_width;
1172
1173         if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1174                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1175         if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1176                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1177         c->x = MAX(c->x, c->mon->mx);
1178         /* only fix client y-offset, if the client center might cover the bar */
1179         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1180                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1181         c->bw = borderpx;
1182
1183         wc.border_width = c->bw;
1184         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1185         XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->rgb);
1186         configure(c); /* propagates border_width, if size doesn't change */
1187         updatewindowtype(c);
1188         updatesizehints(c);
1189         updatewmhints(c);
1190         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1191         grabbuttons(c, False);
1192         if(!c->isfloating)
1193                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1194         if(c->isfloating)
1195                 XRaiseWindow(dpy, c->win);
1196         attach(c);
1197         attachstack(c);
1198         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1199                         (unsigned char *) &(c->win), 1);
1200         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1201         setclientstate(c, NormalState);
1202         if (c->mon == selmon)
1203                 unfocus(selmon->sel, False);
1204         c->mon->sel = c;
1205         arrange(c->mon);
1206         XMapWindow(dpy, c->win);
1207         focus(c);
1208         if(key_buffering) {
1209                 if(key_buffer_len > 0) {
1210                         for(i = 0; i < key_buffer_len; ++i) {
1211                                 send_keycode(key_buffer[i].keycode, key_buffer[i].state);
1212                         }
1213                 }
1214                 key_buffer_len = 0;
1215                 key_buffering = False;
1216         }
1217 }
1218
1219 void
1220 mappingnotify(XEvent *e) {
1221         XMappingEvent *ev = &e->xmapping;
1222
1223         XRefreshKeyboardMapping(ev);
1224         if(ev->request == MappingKeyboard)
1225                 grabkeys();
1226 }
1227
1228 void
1229 maprequest(XEvent *e) {
1230         static XWindowAttributes wa;
1231         XMapRequestEvent *ev = &e->xmaprequest;
1232
1233         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1234                 return;
1235         if(wa.override_redirect) {
1236                 key_buffer_len = 0;
1237                 key_buffering = False;
1238                 return;
1239         }
1240         if(!wintoclient(ev->window))
1241                 manage(ev->window, &wa);
1242 }
1243
1244 void
1245 monocle(Monitor *m) {
1246         unsigned int n = 0;
1247         Client *c;
1248
1249         for(c = m->clients; c; c = c->next)
1250                 if(ISVISIBLE(c))
1251                         n++;
1252         if(n > 0) /* override layout symbol */
1253                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1254         for(c = snexttiled(m->stack); c; c = snexttiled(c->snext)) {
1255                 if (c == m->sel) {
1256                         resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False, 0);
1257                 } else {
1258                         // this window is should not be visible. move off top, but don't change h/w
1259                         resize(c, m->wx, m->wy - 4000, c->w, c->h, False, 0);
1260                 }
1261         }
1262 }
1263
1264 void
1265 motionnotify(XEvent *e) {
1266         static Monitor *mon = NULL;
1267         Monitor *m;
1268         XMotionEvent *ev = &e->xmotion;
1269
1270         if(ev->window != root)
1271                 return;
1272         if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1273                 unfocus(selmon->sel, True);
1274                 selmon = m;
1275                 focus(NULL);
1276         }
1277         mon = m;
1278 }
1279
1280 void
1281 movemouse(const Arg *arg) {
1282         int x, y, ocx, ocy, nx, ny;
1283         Client *c;
1284         Monitor *m;
1285         XEvent ev;
1286         Time lasttime = 0;
1287
1288         if(!(c = selmon->sel))
1289                 return;
1290         if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1291                 return;
1292         restack(selmon);
1293         ocx = c->x;
1294         ocy = c->y;
1295         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1296         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1297                 return;
1298         if(!getrootptr(&x, &y))
1299                 return;
1300         do {
1301                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1302                 switch(ev.type) {
1303                 case ConfigureRequest:
1304                 case Expose:
1305                 case MapRequest:
1306                         handler[ev.type](&ev);
1307                         break;
1308                 case MotionNotify:
1309                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1310                                 continue;
1311                         lasttime = ev.xmotion.time;
1312
1313                         nx = ocx + (ev.xmotion.x - x);
1314                         ny = ocy + (ev.xmotion.y - y);
1315                         if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1316                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1317                                 if(abs(selmon->wx - nx) < snap)
1318                                         nx = selmon->wx;
1319                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1320                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1321                                 if(abs(selmon->wy - ny) < snap)
1322                                         ny = selmon->wy;
1323                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1324                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1325                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1326                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1327                                         togglefloating(NULL);
1328                         }
1329                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1330                                 resize(c, nx, ny, c->w, c->h, True, 0);
1331                         break;
1332                 }
1333         } while(ev.type != ButtonRelease);
1334         XUngrabPointer(dpy, CurrentTime);
1335         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1336                 sendmon(c, m);
1337                 selmon = m;
1338                 focus(NULL);
1339         }
1340 }
1341
1342 Client *
1343 nexttiled(Client *c) {
1344         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1345         return c;
1346 }
1347
1348 Client *
1349 snexttiled(Client *c) {
1350         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->snext);
1351         return c;
1352 }
1353
1354 Client *
1355 nextvisible(Client *c) {
1356         for(; c && !ISVISIBLE(c); c = c->next);
1357         return c;
1358 }
1359
1360 void
1361 pop(Client *c) {
1362         detach(c);
1363         attach_as_master(c);
1364         focus(c);
1365         arrange(c->mon);
1366 }
1367
1368 void
1369 propertynotify(XEvent *e) {
1370         Client *c;
1371         Window trans;
1372         XPropertyEvent *ev = &e->xproperty;
1373
1374         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1375                 updatestatus();
1376         else if(ev->state == PropertyDelete)
1377                 return; /* ignore */
1378         else if((c = wintoclient(ev->window))) {
1379                 switch(ev->atom) {
1380                 default: break;
1381                 case XA_WM_TRANSIENT_FOR:
1382                         if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1383                            (c->isfloating = (wintoclient(trans)) != NULL))
1384                                 arrange(c->mon);
1385                         break;
1386                 case XA_WM_NORMAL_HINTS:
1387                         updatesizehints(c);
1388                         break;
1389                 case XA_WM_HINTS:
1390                         updatewmhints(c);
1391                         drawbars();
1392                         break;
1393                 }
1394                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1395                         updatetitle(c);
1396                         if(c == c->mon->sel)
1397                                 drawbar(c->mon);
1398                 }
1399                 if(ev->atom == netatom[NetWMWindowType])
1400                         updatewindowtype(c);
1401         }
1402 }
1403
1404 void
1405 quit(const Arg *arg) {
1406         running = False;
1407 }
1408
1409 Monitor *
1410 recttomon(int x, int y, int w, int h) {
1411         Monitor *m, *r = selmon;
1412         int a, area = 0;
1413
1414         for(m = mons; m; m = m->next)
1415                 if((a = INTERSECT(x, y, w, h, m)) > area) {
1416                         area = a;
1417                         r = m;
1418                 }
1419         return r;
1420 }
1421
1422 void
1423 resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base) {
1424         if(applysizehints(c, &x, &y, &w, &h, interact))
1425                 resizeclient(c, x, y, w, h, base);
1426 }
1427
1428 void
1429 resizeclient(Client *c, int x, int y, int w, int h, Client *base) {
1430         XWindowChanges wc;
1431         unsigned long mask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
1432
1433         c->oldx = c->x; c->x = wc.x = x;
1434         c->oldy = c->y; c->y = wc.y = y;
1435         c->oldw = c->w; c->w = wc.width = w;
1436         c->oldh = c->h; c->h = wc.height = h;
1437         // base = 0;
1438         if (base) {
1439                 wc.stack_mode = Above;
1440                 wc.sibling = base->win;
1441                 mask |= CWStackMode|CWSibling;
1442         }
1443         wc.border_width = c->bw;
1444         XConfigureWindow(dpy, c->win, mask, &wc);
1445         configure(c);
1446         XSync(dpy, False);
1447 }
1448
1449 void
1450 resizemouse(const Arg *arg) {
1451         int ocx, ocy, nw, nh;
1452         Client *c;
1453         Monitor *m;
1454         XEvent ev;
1455         Time lasttime = 0;
1456
1457         if(!(c = selmon->sel))
1458                 return;
1459         if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1460                 return;
1461         restack(selmon);
1462         ocx = c->x;
1463         ocy = c->y;
1464         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1465                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1466                 return;
1467         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1468         do {
1469                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1470                 switch(ev.type) {
1471                 case ConfigureRequest:
1472                 case Expose:
1473                 case MapRequest:
1474                         handler[ev.type](&ev);
1475                         break;
1476                 case MotionNotify:
1477                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1478                                 continue;
1479                         lasttime = ev.xmotion.time;
1480
1481                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1482                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1483                         if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1484                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1485                         {
1486                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1487                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1488                                         togglefloating(NULL);
1489                         }
1490                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1491                                 resize(c, c->x, c->y, nw, nh, True, 0);
1492                         break;
1493                 }
1494         } while(ev.type != ButtonRelease);
1495         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1496         XUngrabPointer(dpy, CurrentTime);
1497         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1498         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1499                 sendmon(c, m);
1500                 selmon = m;
1501                 focus(NULL);
1502         }
1503 }
1504
1505 void
1506 restack(Monitor *m) {
1507         Client *c;
1508         XEvent ev;
1509         XWindowChanges wc;
1510
1511         drawbar(m);
1512         if(!m->sel)
1513                 return;
1514         if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1515                 XRaiseWindow(dpy, m->sel->win);
1516         if(m->lt[m->sellt]->arrange) {
1517                 wc.stack_mode = Below;
1518                 wc.sibling = m->barwin;
1519                 for(c = m->clients; c; c = c->next)
1520                         if(!c->isfloating && ISVISIBLE(c)) {
1521                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1522                                 wc.sibling = c->win;
1523                                 wc.stack_mode = Above;
1524                         }
1525         }
1526         XSync(dpy, False);
1527         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1528 }
1529
1530 void
1531 run(void) {
1532         XEvent ev;
1533         /* main event loop */
1534         XSync(dpy, False);
1535         while(running && !XNextEvent(dpy, &ev))
1536                 if(handler[ev.type])
1537                         handler[ev.type](&ev); /* call handler */
1538 }
1539
1540 void
1541 scan(void) {
1542         unsigned int i, num;
1543         Window d1, d2, *wins = NULL;
1544         XWindowAttributes wa;
1545
1546         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1547                 for(i = 0; i < num; i++) {
1548                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1549                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1550                                 continue;
1551                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1552                                 manage(wins[i], &wa);
1553                 }
1554                 for(i = 0; i < num; i++) { /* now the transients */
1555                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1556                                 continue;
1557                         if(XGetTransientForHint(dpy, wins[i], &d1)
1558                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1559                                 manage(wins[i], &wa);
1560                 }
1561                 if(wins)
1562                         XFree(wins);
1563         }
1564 }
1565
1566 void
1567 sendmon(Client *c, Monitor *m) {
1568         if(c->mon == m)
1569                 return;
1570         unfocus(c, True);
1571         detachstack(c);
1572         detach(c);
1573         c->mon = m;
1574         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1575         attach(c);
1576         attachstack(c);
1577         focus(NULL);
1578         arrange(NULL);
1579 }
1580
1581 void
1582 setclientstate(Client *c, long state) {
1583         long data[] = { state, None };
1584
1585         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1586                         PropModeReplace, (unsigned char *)data, 2);
1587 }
1588
1589 Bool
1590 sendevent(Client *c, Atom proto) {
1591         int n;
1592         Atom *protocols;
1593         Bool exists = False;
1594         XEvent ev;
1595
1596         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1597                 while(!exists && n--)
1598                         exists = protocols[n] == proto;
1599                 XFree(protocols);
1600         }
1601         if(exists) {
1602                 ev.type = ClientMessage;
1603                 ev.xclient.window = c->win;
1604                 ev.xclient.message_type = wmatom[WMProtocols];
1605                 ev.xclient.format = 32;
1606                 ev.xclient.data.l[0] = proto;
1607                 ev.xclient.data.l[1] = CurrentTime;
1608                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1609         }
1610         return exists;
1611 }
1612
1613 void
1614 setfocus(Client *c) {
1615         if(!c->neverfocus) {
1616                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1617                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1618                                 XA_WINDOW, 32, PropModeReplace,
1619                                 (unsigned char *) &(c->win), 1);
1620         }
1621         sendevent(c, wmatom[WMTakeFocus]);
1622 }
1623
1624 void
1625 setfullscreen(Client *c, Bool fullscreen) {
1626         if(fullscreen) {
1627                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1628                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1629                 c->isfullscreen = True;
1630                 c->oldstate = c->isfloating;
1631                 c->oldbw = c->bw;
1632                 c->bw = 0;
1633                 c->isfloating = True;
1634                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh, 0);
1635                 XRaiseWindow(dpy, c->win);
1636         }
1637         else {
1638                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1639                                 PropModeReplace, (unsigned char*)0, 0);
1640                 c->isfullscreen = False;
1641                 c->isfloating = c->oldstate;
1642                 c->bw = c->oldbw;
1643                 c->x = c->oldx;
1644                 c->y = c->oldy;
1645                 c->w = c->oldw;
1646                 c->h = c->oldh;
1647                 resizeclient(c, c->x, c->y, c->w, c->h, 0);
1648                 arrange(c->mon);
1649         }
1650 }
1651
1652 void
1653 setlayout(const Arg *arg) {
1654         if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1655                 selmon->sellt ^= 1;
1656         if(arg && arg->v)
1657                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1658         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1659         if(selmon->sel)
1660                 arrange(selmon);
1661         else
1662                 drawbar(selmon);
1663 }
1664
1665 /* arg > 1.0 will set mfact absolutly */
1666 void
1667 setmfact(const Arg *arg) {
1668         float f;
1669
1670         if(!arg || !selmon->lt[selmon->sellt]->arrange)
1671                 return;
1672         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1673         if(f < 0.1 || f > 0.9)
1674                 return;
1675         selmon->mfact = f;
1676         arrange(selmon);
1677 }
1678
1679 void
1680 setup(void) {
1681         XSetWindowAttributes wa;
1682
1683         /* clean up any zombies immediately */
1684         sigchld(0);
1685
1686         /* init screen */
1687         screen = DefaultScreen(dpy);
1688         root = RootWindow(dpy, screen);
1689         fnt = drw_font_create(dpy, font);
1690         sw = DisplayWidth(dpy, screen);
1691         sh = DisplayHeight(dpy, screen);
1692         bh = fnt->h + 2;
1693         drw = drw_create(dpy, screen, root, sw, sh);
1694         drw_setfont(drw, fnt);
1695         updategeom();
1696         /* init atoms */
1697         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1698         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1699         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1700         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1701         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1702         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1703         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1704         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1705         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1706         netatom[NetWMWindowOpacity] = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
1707         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1708         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1709         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1710         netatom[NetSupportingWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1711         XInternAtom(dpy, "_MOTIF_WM_HINTS", False); /* clients may request borderless/fullscreen */
1712         /* init cursors */
1713         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1714         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1715         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1716         /* init appearance */
1717         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1718         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1719         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1720         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1721         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1722         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1723         /* init bars */
1724         updatebars();
1725         updatestatus();
1726         /* EWMH support per view */
1727         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1728                         PropModeReplace, (unsigned char *) netatom, NetLast);
1729         XDeleteProperty(dpy, root, netatom[NetClientList]);
1730         /* select for events */
1731         wa.cursor = cursor[CurNormal]->cursor;
1732         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1733                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1734         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1735         XSelectInput(dpy, root, wa.event_mask);
1736         grabkeys();
1737         focus(NULL);
1738 }
1739
1740 void
1741 showhide(Client *c) {
1742         if(!c)
1743                 return;
1744         if(ISVISIBLE(c)) { /* show clients top down */
1745                 XMoveWindow(dpy, c->win, c->x, c->y);
1746                 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1747                         resize(c, c->x, c->y, c->w, c->h, False, 0);
1748                 showhide(c->snext);
1749         }
1750         else { /* hide clients bottom up */
1751                 showhide(c->snext);
1752                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1753         }
1754 }
1755
1756 void
1757 sigchld(int unused) {
1758         if(signal(SIGCHLD, sigchld) == SIG_ERR)
1759                 die("Can't install SIGCHLD handler");
1760         while(0 < waitpid(-1, NULL, WNOHANG));
1761 }
1762
1763 void
1764 kbspawn(const Arg *arg) {
1765         key_buffering = True;
1766         key_buffer_len = 0;
1767         spawn(arg);
1768 }
1769
1770 void
1771 spawn(const Arg *arg) {
1772         int tag = 0, i;
1773         if(arg->v == termcmd) {
1774                 for(i = 0; i < 32; ++i) {
1775                         if(selmon->tagset[selmon->seltags] & (1 << i)) {
1776                                 tag = i;
1777                                 break;
1778                         }
1779                 }
1780                 WORKSPACE_NUMBER[17] = workspace_numbers_str[tag][0];
1781                 WORKSPACE_NUMBER[18] = workspace_numbers_str[tag][1];
1782         }
1783         if(arg->v == dmenucmd)
1784                 dmenumon[0] = '0' + selmon->num;
1785         if(fork() == 0) {
1786                 if(dpy)
1787                         close(ConnectionNumber(dpy));
1788                 setsid();
1789                 execvp(((char **)arg->v)[0], (char **)arg->v);
1790                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1791                 perror(" failed");
1792                 exit(EXIT_SUCCESS);
1793         }
1794 }
1795
1796 void
1797 tag(const Arg *arg) {
1798         if(selmon->sel && arg->ui & TAGMASK) {
1799                 selmon->sel->tags = arg->ui & TAGMASK;
1800                 focus(NULL);
1801                 arrange(selmon);
1802         }
1803 }
1804
1805 void
1806 tagmon(const Arg *arg) {
1807         if(!selmon->sel || !mons->next)
1808                 return;
1809         sendmon(selmon->sel, dirtomon(arg->i));
1810 }
1811
1812 void
1813 tile(Monitor *m) {
1814         unsigned int i, n, h, mw, my, ty;
1815         Client *c;
1816
1817         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1818         if(n == 0)
1819                 return;
1820
1821         if(n > m->nmaster)
1822                 mw = m->nmaster ? m->ww * m->mfact : 0;
1823         else {
1824                 c = nexttiled(m->clients);
1825                 if (c && !c->screen_hog)
1826                         mw = m->ww * m->mfact;
1827                 else
1828                         mw = m->ww;
1829         }
1830         for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1831                 if(i < m->nmaster) {
1832                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1833                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False, 0);
1834                         my += HEIGHT(c);
1835                 }
1836                 else {
1837                         h = (m->wh - ty) / (n - i);
1838                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False, 0);
1839                         ty += HEIGHT(c);
1840                 }
1841 }
1842
1843 #define TAB_HEIGHT 19
1844 #define TAB_PAD     7
1845
1846 void
1847 jason_layout(Monitor *m) {
1848         unsigned int i, tiled_count, mw, right_width, tab_counts[2] = {0,0}, cur_tab = 0, *tab_count;
1849         int tab_top;
1850         Client *c, *vis_slave = 0, *base = 0;
1851
1852         tab_count = &(tab_counts[0]);
1853
1854         for(tiled_count = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), tiled_count++) {
1855                 if (tiled_count == 0) { // master
1856                         if (c->next) {
1857                                 if (m->sel && (m->sel == c || m->sel->isfloating || !ISVISIBLE(m->sel))) {
1858                                         vis_slave = nexttiled(c->next);
1859                                 } else {
1860                                         vis_slave = m->sel;
1861                                 }
1862                         }
1863                 } else {
1864                         if (c == vis_slave) {
1865                                 tab_count = &(tab_counts[1]);
1866                         } else {
1867                                 (*tab_count) += 1;
1868                         }
1869                 }
1870         }
1871         if(tiled_count == 0) {
1872                 return;
1873         }
1874
1875         if(tiled_count > 1 || (tiled_count == 1 && !nexttiled(m->clients)->screen_hog)) {
1876                 mw = m->ww * m->mfact;
1877         } else {
1878                 mw = m->ww;
1879         }
1880         right_width = m->ww - mw;
1881         tab_count = &(tab_counts[0]);
1882         tab_top = m->wy - (m->wh - (2 * (TAB_HEIGHT + TAB_PAD))) + TAB_HEIGHT;
1883         for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
1884                 if (i == 0) {
1885                         resize(c, m->wx, m->wy, mw, m->wh, False, 0);
1886                 } else {
1887                         if (c == vis_slave) {
1888                                 resize(c, m->wx + mw, m->wy + TAB_HEIGHT + TAB_PAD, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1889                                 tab_count = &(tab_counts[1]);
1890                                 tab_top = m->wy + m->wh - TAB_HEIGHT;
1891                                 cur_tab = 0;
1892                         } else {
1893                                 // this function does not get called when focus changes
1894                                 // resize(c, m->wx + m->ww, m->wy, m->ww - mw, m->wh, False);
1895                                 resize(c, m->wx + mw + right_width * cur_tab / (*tab_count), tab_top, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1896                                 cur_tab += 1;
1897                         }
1898                 }
1899                 base = c;
1900         }
1901 }
1902
1903 void
1904 togglebar(const Arg *arg) {
1905         selmon->showbar = !selmon->showbar;
1906         updatebarpos(selmon);
1907         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1908         arrange(selmon);
1909 }
1910
1911 void
1912 togglefloating(const Arg *arg) {
1913         if(!selmon->sel)
1914                 return;
1915         if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1916                 return;
1917         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1918         if(selmon->sel->isfloating)
1919                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1920                        selmon->sel->w, selmon->sel->h, False, 0);
1921         arrange(selmon);
1922 }
1923
1924 void
1925 toggletag(const Arg *arg) {
1926         unsigned int newtags;
1927
1928         if(!selmon->sel)
1929                 return;
1930         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1931         if(newtags) {
1932                 selmon->sel->tags = newtags;
1933                 focus(NULL);
1934                 arrange(selmon);
1935         }
1936 }
1937
1938 void
1939 toggleview(const Arg *arg) {
1940         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1941
1942         if(newtagset) {
1943                 selmon->tagset[selmon->seltags] = newtagset;
1944                 focus(NULL);
1945                 arrange(selmon);
1946         }
1947 }
1948
1949 void
1950 unfocus(Client *c, Bool setfocus) {
1951         if(!c)
1952                 return;
1953         grabbuttons(c, False);
1954         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->rgb);
1955         if(setfocus) {
1956                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1957                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1958         }
1959 }
1960
1961 void
1962 unmanage(Client *c, Bool destroyed) {
1963         Monitor *m = c->mon;
1964         XWindowChanges wc;
1965
1966         /* The server grab construct avoids race conditions. */
1967         detachstack(c);
1968         detach(c);
1969         if(!destroyed) {
1970                 wc.border_width = c->oldbw;
1971                 XGrabServer(dpy);
1972                 XSetErrorHandler(xerrordummy);
1973                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1974                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1975                 setclientstate(c, WithdrawnState);
1976                 XSync(dpy, False);
1977                 XSetErrorHandler(xerror);
1978                 XUngrabServer(dpy);
1979         }
1980         free(c);
1981         focus(selmon ? selmon->sel : NULL);
1982         updateclientlist();
1983         arrange(m);
1984 }
1985
1986 void
1987 unmapnotify(XEvent *e) {
1988         Client *c;
1989         XUnmapEvent *ev = &e->xunmap;
1990
1991         if((c = wintoclient(ev->window))) {
1992                 if(ev->send_event)
1993                         setclientstate(c, WithdrawnState);
1994                 else
1995                         unmanage(c, False);
1996         }
1997 }
1998
1999 void
2000 updatebars(void) {
2001         Monitor *m;
2002         XSetWindowAttributes wa = {
2003                 .override_redirect = True,
2004                 .background_pixmap = ParentRelative,
2005                 .event_mask = ButtonPressMask|ExposureMask
2006         };
2007         for(m = mons; m; m = m->next) {
2008                 if (m->barwin)
2009                         continue;
2010                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
2011                                           CopyFromParent, DefaultVisual(dpy, screen),
2012                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
2013                 XChangeProperty(dpy, root, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
2014                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
2015                 XChangeProperty(dpy, m->barwin, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
2016                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
2017                 XChangeProperty(dpy, m->barwin, netatom[NetWMName], XA_STRING, 8,
2018                                 PropModeReplace, (unsigned char *) "dwm", 3);
2019                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
2020                 XMapRaised(dpy, m->barwin);
2021         }
2022 }
2023
2024 void
2025 updatebarpos(Monitor *m) {
2026         m->wy = m->my;
2027         m->wh = m->mh;
2028         if(m->showbar) {
2029                 m->wh -= bh;
2030                 m->by = m->topbar ? m->wy : m->wy + m->wh;
2031                 m->wy = m->topbar ? m->wy + bh : m->wy;
2032         }
2033         else
2034                 m->by = -bh;
2035 }
2036
2037 void
2038 updateclientlist() {
2039         Client *c;
2040         Monitor *m;
2041
2042         XDeleteProperty(dpy, root, netatom[NetClientList]);
2043         for(m = mons; m; m = m->next)
2044                 for(c = m->clients; c; c = c->next)
2045                         XChangeProperty(dpy, root, netatom[NetClientList],
2046                                         XA_WINDOW, 32, PropModeAppend,
2047                                         (unsigned char *) &(c->win), 1);
2048 }
2049
2050 Bool
2051 updategeom(void) {
2052         Bool dirty = False;
2053
2054 #ifdef XINERAMA
2055         if(XineramaIsActive(dpy)) {
2056                 int i, j, n, nn;
2057                 Client *c;
2058                 Monitor *m;
2059                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2060                 XineramaScreenInfo *unique = NULL;
2061
2062                 for(n = 0, m = mons; m; m = m->next, n++);
2063                 /* only consider unique geometries as separate screens */
2064                 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
2065                         die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
2066                 for(i = 0, j = 0; i < nn; i++)
2067                         if(isuniquegeom(unique, j, &info[i]))
2068                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2069                 XFree(info);
2070                 nn = j;
2071                 if(n <= nn) {
2072                         for(i = 0; i < (nn - n); i++) { /* new monitors available */
2073                                 for(m = mons; m && m->next; m = m->next);
2074                                 if(m)
2075                                         m->next = createmon();
2076                                 else
2077                                         mons = createmon();
2078                         }
2079                         for(i = 0, m = mons; i < nn && m; m = m->next, i++)
2080                                 if(i >= n
2081                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
2082                                     || unique[i].width != m->mw || unique[i].height != m->mh))
2083                                 {
2084                                         dirty = True;
2085                                         m->num = i;
2086                                         m->mx = m->wx = unique[i].x_org;
2087                                         m->my = m->wy = unique[i].y_org;
2088                                         m->mw = m->ww = unique[i].width;
2089                                         m->mh = m->wh = unique[i].height;
2090                                         updatebarpos(m);
2091                                 }
2092                 }
2093                 else { /* less monitors available nn < n */
2094                         for(i = nn; i < n; i++) {
2095                                 for(m = mons; m && m->next; m = m->next);
2096                                 while(m->clients) {
2097                                         dirty = True;
2098                                         c = m->clients;
2099                                         m->clients = c->next;
2100                                         detachstack(c);
2101                                         c->mon = mons;
2102                                         attach(c);
2103                                         attachstack(c);
2104                                 }
2105                                 if(m == selmon)
2106                                         selmon = mons;
2107                                 cleanupmon(m);
2108                         }
2109                 }
2110                 free(unique);
2111         }
2112         else
2113 #endif /* XINERAMA */
2114         /* default monitor setup */
2115         {
2116                 if(!mons)
2117                         mons = createmon();
2118                 if(mons->mw != sw || mons->mh != sh) {
2119                         dirty = True;
2120                         mons->mw = mons->ww = sw;
2121                         mons->mh = mons->wh = sh;
2122                         updatebarpos(mons);
2123                 }
2124         }
2125         if(dirty) {
2126                 selmon = mons;
2127                 selmon = wintomon(root);
2128         }
2129         return dirty;
2130 }
2131
2132 void
2133 updatenumlockmask(void) {
2134         unsigned int i, j;
2135         XModifierKeymap *modmap;
2136
2137         numlockmask = 0;
2138         modmap = XGetModifierMapping(dpy);
2139         for(i = 0; i < 8; i++)
2140                 for(j = 0; j < modmap->max_keypermod; j++)
2141                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
2142                            == XKeysymToKeycode(dpy, XK_Num_Lock))
2143                                 numlockmask = (1 << i);
2144         XFreeModifiermap(modmap);
2145 }
2146
2147 void
2148 updatesizehints(Client *c) {
2149         long msize;
2150         XSizeHints size;
2151
2152         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
2153                 /* size is uninitialized, ensure that size.flags aren't used */
2154                 size.flags = PSize;
2155         if(size.flags & PBaseSize) {
2156                 c->basew = size.base_width;
2157                 c->baseh = size.base_height;
2158         }
2159         else if(size.flags & PMinSize) {
2160                 c->basew = size.min_width;
2161                 c->baseh = size.min_height;
2162         }
2163         else
2164                 c->basew = c->baseh = 0;
2165         if(size.flags & PResizeInc) {
2166                 c->incw = size.width_inc;
2167                 c->inch = size.height_inc;
2168         }
2169         else
2170                 c->incw = c->inch = 0;
2171         if(size.flags & PMaxSize) {
2172                 c->maxw = size.max_width;
2173                 c->maxh = size.max_height;
2174         }
2175         else
2176                 c->maxw = c->maxh = 0;
2177         if(size.flags & PMinSize) {
2178                 c->minw = size.min_width;
2179                 c->minh = size.min_height;
2180         }
2181         else if(size.flags & PBaseSize) {
2182                 c->minw = size.base_width;
2183                 c->minh = size.base_height;
2184         }
2185         else
2186                 c->minw = c->minh = 0;
2187         if(size.flags & PAspect) {
2188                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2189                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2190         }
2191         else
2192                 c->maxa = c->mina = 0.0;
2193         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
2194                      && c->maxw == c->minw && c->maxh == c->minh);
2195 }
2196
2197 void
2198 updatetitle(Client *c) {
2199         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2200                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2201         if(c->name[0] == '\0') /* hack to mark broken clients */
2202                 strcpy(c->name, broken);
2203 }
2204
2205 void
2206 updatestatus(void) {
2207         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2208                 strcpy(stext, "dwm-"VERSION);
2209         drawbar(selmon);
2210 }
2211
2212 void
2213 updatewindowtype(Client *c) {
2214         Atom state = getatomprop(c, netatom[NetWMState]);
2215         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2216
2217         if(state == netatom[NetWMFullscreen])
2218                 setfullscreen(c, True);
2219         if(wtype == netatom[NetWMWindowTypeDialog])
2220                 c->isfloating = True;
2221 }
2222
2223 void
2224 updatewmhints(Client *c) {
2225         XWMHints *wmh;
2226
2227         if((wmh = XGetWMHints(dpy, c->win))) {
2228                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2229                         wmh->flags &= ~XUrgencyHint;
2230                         XSetWMHints(dpy, c->win, wmh);
2231                 }
2232                 else
2233                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2234                 if(wmh->flags & InputHint)
2235                         c->neverfocus = !wmh->input;
2236                 else
2237                         c->neverfocus = False;
2238                 XFree(wmh);
2239         }
2240 }
2241
2242 void
2243 view(const Arg *arg) {
2244         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2245                 return;
2246         selmon->seltags ^= 1; /* toggle sel tagset */
2247         if(arg->ui & TAGMASK)
2248                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2249         focus(NULL);
2250         arrange(selmon);
2251 }
2252
2253 Client *
2254 wintoclient(Window w) {
2255         Client *c;
2256         Monitor *m;
2257
2258         for(m = mons; m; m = m->next)
2259                 for(c = m->clients; c; c = c->next)
2260                         if(c->win == w)
2261                                 return c;
2262         return NULL;
2263 }
2264
2265 Monitor *
2266 wintomon(Window w) {
2267         int x, y;
2268         Client *c;
2269         Monitor *m;
2270
2271         if(w == root && getrootptr(&x, &y))
2272                 return recttomon(x, y, 1, 1);
2273         for(m = mons; m; m = m->next)
2274                 if(w == m->barwin)
2275                         return m;
2276         if((c = wintoclient(w)))
2277                 return c->mon;
2278         return selmon;
2279 }
2280
2281 /* There's no way to check accesses to destroyed windows, thus those cases are
2282  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2283  * default error handler, which may call exit.  */
2284 int
2285 xerror(Display *dpy, XErrorEvent *ee) {
2286         if(ee->error_code == BadWindow
2287         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2288         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2289         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2290         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2291         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2292         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2293         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2294         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2295                 return 0;
2296         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2297                         ee->request_code, ee->error_code);
2298         return xerrorxlib(dpy, ee); /* may call exit */
2299 }
2300
2301 int
2302 xerrordummy(Display *dpy, XErrorEvent *ee) {
2303         return 0;
2304 }
2305
2306 /* Startup Error handler to check if another window manager
2307  * is already running. */
2308 int
2309 xerrorstart(Display *dpy, XErrorEvent *ee) {
2310         die("dwm: another window manager is already running\n");
2311         return -1;
2312 }
2313
2314 void
2315 zoom(const Arg *arg) {
2316         Client *c = selmon->sel;
2317
2318         if(!selmon->lt[selmon->sellt]->arrange
2319         || (selmon->sel && selmon->sel->isfloating))
2320                 return;
2321         if(c == nexttiled(selmon->clients))
2322                 if(!c || !(c = nexttiled(c->next)))
2323                         return;
2324         pop(c);
2325 }
2326
2327 int
2328 main(int argc, char *argv[]) {
2329         if(argc == 2 && !strcmp("-v", argv[1]))
2330                 die("dwm-"VERSION", © 2006-2014 dwm engineers, see LICENSE for details\n");
2331         else if(argc != 1)
2332                 die("usage: dwm [-v]\n");
2333         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2334                 fputs("warning: no locale support\n", stderr);
2335         if(!(dpy = XOpenDisplay(NULL)))
2336                 die("dwm: cannot open display\n");
2337         checkotherwm();
2338         setup();
2339         scan();
2340         run();
2341         cleanup();
2342         XCloseDisplay(dpy);
2343         return EXIT_SUCCESS;
2344 }