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         w = blw = TEXTW(m->ltsymbol);
 815         drw_setscheme(drw, &scheme[SchemeNorm]);
 816         drw_text(drw, x, 0, w, bh, m->ltsymbol, 0);
 817         x += w;
 818         xx = x;
 819         if(m == selmon) { /* status is only drawn on selected monitor */
 820                 w = TEXTW(stext);
 821                 x = m->ww - w;
 822                 if(x < xx) {
 823                         x = xx;
 824                         w = m->ww - xx;
 825                 }
 826                 drw_text(drw, x, 0, w, bh, stext, 0);
 827         }
 828         else
 829                 x = m->ww;
 830         if((w = x - xx) > bh) {
 831                 x = xx;
 832                 if(m->sel) {
 833                         drw_setscheme(drw, m == selmon ? &scheme[SchemeSel] : &scheme[SchemeNorm]);
 834                         drw_text(drw, x, 0, w, bh, m->sel->name, 0);
 835                         drw_rect(drw, x, 0, w, bh, m->sel->isfixed, m->sel->isfloating, 0);
 836                 }
 837                 else {
 838                         drw_setscheme(drw, &scheme[SchemeNorm]);
 839                         drw_text(drw, x, 0, w, bh, NULL, 0);
 840                 }
 841         }
 842         drw_map(drw, m->barwin, 0, 0, m->ww, bh);
 843 }
 844
 845 void
 846 drawbars(void) {
 847         Monitor *m;
 848
 849         for(m = mons; m; m = m->next)
 850                 drawbar(m);
 851 }
 852
 853 void
 854 enternotify(XEvent *e) {
 855         Client *c;
 856         Monitor *m;
 857         XCrossingEvent *ev = &e->xcrossing;
 858
 859         return; // jason: added to stop mouse focus
 860
 861         if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
 862                 return;
 863         c = wintoclient(ev->window);
 864         m = c ? c->mon : wintomon(ev->window);
 865         if(m != selmon) {
 866                 unfocus(selmon->sel, True);
 867                 selmon = m;
 868         }
 869         else if(!c || c == selmon->sel)
 870                 return;
 871         focus(c);
 872 }
 873
 874 void
 875 expose(XEvent *e) {
 876         Monitor *m;
 877         XExposeEvent *ev = &e->xexpose;
 878
 879         if(ev->count == 0 && (m = wintomon(ev->window)))
 880                 drawbar(m);
 881 }
 882
 883 void
 884 focus(Client *c) {
 885         if(!c || !ISVISIBLE(c))
 886                 for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 887         /* was if(selmon->sel) */
 888         if(selmon->sel && selmon->sel != c)
 889                 unfocus(selmon->sel, False);
 890         if(c) {
 891                 if(c->mon != selmon)
 892                         selmon = c->mon;
 893                 if(c->isurgent)
 894                         clearurgent(c);
 895                 detachstack(c);
 896                 attachstack(c);
 897                 grabbuttons(c, True);
 898                 XSetWindowBorder(dpy, c->win, scheme[SchemeSel].border->rgb);
 899                 setfocus(c);
 900         }
 901         else {
 902                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 903                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 904         }
 905         selmon->sel = c;
 906         arrange(selmon);
 907         update_window_opacities(selmon);
 908         drawbars();
 909         if(c && (!root || (c->win!=root)) )
 910                 window_set_opaque(c);
 911 }
 912
 913 void
 914 focusin(XEvent *e) { /* there are some broken focus acquiring clients */
 915         XFocusChangeEvent *ev = &e->xfocus;
 916
 917         if(selmon->sel && ev->window != selmon->sel->win)
 918                 setfocus(selmon->sel);
 919 }
 920
 921 void
 922 focusmon(const Arg *arg) {
 923         Monitor *m;
 924
 925         if(!mons->next)
 926                 return;
 927         if((m = dirtomon(arg->i)) == selmon)
 928                 return;
 929         unfocus(selmon->sel, False); /* s/True/False/ fixes input focus issues
 930                                         in gedit and anjuta */
 931         selmon = m;
 932         focus(NULL);
 933 }
 934
 935 void
 936 focusstack(const Arg *arg) {
 937         Client *c = NULL, *i;
 938
 939         if(!selmon->sel)
 940                 return;
 941         if(arg->i == 0) {
 942                 for(i = selmon->clients; i != selmon->sel; i = i->next) {
 943                         if(ISVISIBLE(i)) {
 944                                 c = i;
 945                                 break;
 946                         }
 947                 }
 948         } else if(arg->i > 0) {
 949                 for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
 950                 if(!c)
 951                         for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
 952         }
 953         else {
 954                 for(i = selmon->clients; i != selmon->sel; i = i->next)
 955                         if(ISVISIBLE(i))
 956                                 c = i;
 957                 if(!c)
 958                         for(; i; i = i->next)
 959                                 if(ISVISIBLE(i))
 960                                         c = i;
 961         }
 962         if(c) {
 963                 focus(c);
 964                 restack(selmon);
 965         }
 966 }
 967
 968 Atom
 969 getatomprop(Client *c, Atom prop) {
 970         int di;
 971         unsigned long dl;
 972         unsigned char *p = NULL;
 973         Atom da, atom = None;
 974
 975         if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
 976                               &da, &di, &dl, &dl, &p) == Success && p) {
 977                 atom = *(Atom *)p;
 978                 XFree(p);
 979         }
 980         return atom;
 981 }
 982
 983 Bool
 984 getrootptr(int *x, int *y) {
 985         int di;
 986         unsigned int dui;
 987         Window dummy;
 988
 989         return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
 990 }
 991
 992 long
 993 getstate(Window w) {
 994         int format;
 995         long result = -1;
 996         unsigned char *p = NULL;
 997         unsigned long n, extra;
 998         Atom real;
 999
1000         if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
1001                               &real, &format, &n, &extra, (unsigned char **)&p) != Success)
1002                 return -1;
1003         if(n != 0)
1004                 result = *p;
1005         XFree(p);
1006         return result;
1007 }
1008
1009 Bool
1010 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
1011         char **list = NULL;
1012         int n;
1013         XTextProperty name;
1014
1015         if(!text || size == 0)
1016                 return False;
1017         text[0] = '\0';
1018         XGetTextProperty(dpy, w, &name, atom);
1019         if(!name.nitems)
1020                 return False;
1021         if(name.encoding == XA_STRING)
1022                 strncpy(text, (char *)name.value, size - 1);
1023         else {
1024                 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) {
1025                         strncpy(text, *list, size - 1);
1026                         XFreeStringList(list);
1027                 }
1028         }
1029         text[size - 1] = '\0';
1030         XFree(name.value);
1031         return True;
1032 }
1033
1034 void
1035 grabbuttons(Client *c, Bool focused) {
1036         updatenumlockmask();
1037         {
1038                 unsigned int i, j;
1039                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1040                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1041                 if(focused) {
1042                         for(i = 0; i < LENGTH(buttons); i++)
1043                                 if(buttons[i].click == ClkClientWin || buttons[i].click == ClkAnywhere)
1044                                         for(j = 0; j < LENGTH(modifiers); j++)
1045                                                 XGrabButton(dpy, buttons[i].button,
1046                                                             buttons[i].mask | modifiers[j],
1047                                                             c->win, False, BUTTONMASK,
1048                                                             GrabModeAsync, GrabModeSync, None, None);
1049                 } else {
1050                         XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
1051                                     BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
1052                 }
1053         }
1054 }
1055
1056 void
1057 grabkeys(void) {
1058         updatenumlockmask();
1059         //XUngrabKey(dpy, AnyKey, AnyModifier, root);
1060         {
1061                 unsigned int i, j;
1062                 unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
1063                 KeyCode code;
1064
1065                 XUngrabKey(dpy, AnyKey, AnyModifier, root);
1066                 for(i = 0; i < LENGTH(keys); i++)
1067                         if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
1068                                 for(j = 0; j < LENGTH(modifiers); j++)
1069                                         XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
1070                                                  True, GrabModeAsync,
1071                                                  keys[i].func == kbspawn ? GrabModeSync : GrabModeAsync);
1072         }
1073 }
1074
1075 void
1076 incnmaster(const Arg *arg) {
1077         selmon->nmaster = MAX(selmon->nmaster + arg->i, 0);
1078         arrange(selmon);
1079 }
1080
1081 #ifdef XINERAMA
1082 static Bool
1083 isuniquegeom(XineramaScreenInfo *unique, size_t n, XineramaScreenInfo *info) {
1084         while(n--)
1085                 if(unique[n].x_org == info->x_org && unique[n].y_org == info->y_org
1086                 && unique[n].width == info->width && unique[n].height == info->height)
1087                         return False;
1088         return True;
1089 }
1090 #endif /* XINERAMA */
1091
1092 void
1093 keypress(XEvent *e) {
1094         unsigned int i;
1095         KeySym keysym;
1096         XKeyEvent *ev;
1097
1098         ev = &e->xkey;
1099         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
1100         for(i = 0; i < LENGTH(keys); i++) {
1101                 if(keysym == keys[i].keysym
1102                 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
1103                 && keys[i].func) {
1104                         keys[i].func(&(keys[i].arg));
1105                 }
1106         }
1107 }
1108
1109 void
1110 killclient(const Arg *arg) {
1111         if(!selmon->sel)
1112                 return;
1113         if(!sendevent(selmon->sel, wmatom[WMDelete])) {
1114                 XGrabServer(dpy);
1115                 XSetErrorHandler(xerrordummy);
1116                 XSetCloseDownMode(dpy, DestroyAll);
1117                 XKillClient(dpy, selmon->sel->win);
1118                 XSync(dpy, False);
1119                 XSetErrorHandler(xerror);
1120                 XUngrabServer(dpy);
1121         }
1122 }
1123
1124 void
1125 manage(Window w, XWindowAttributes *wa) {
1126         Client *c, *t = NULL;
1127         Window trans = None;
1128         XWindowChanges wc;
1129
1130         if(!(c = calloc(1, sizeof(Client))))
1131                 die("fatal: could not malloc() %u bytes\n", sizeof(Client));
1132         c->opacity = -1; // who knows
1133         c->win = w;
1134         updatetitle(c);
1135         if(XGetTransientForHint(dpy, w, &trans) && (t = wintoclient(trans))) {
1136                 c->mon = t->mon;
1137                 c->tags = t->tags;
1138         }
1139         else {
1140                 c->mon = selmon;
1141                 applyrules(c);
1142         }
1143         /* geometry */
1144         if(c->x == -1 && c->y == -2) { // secret code for centered
1145                 c->x = c->oldx = (c->mon->ww - wa->width) / 2;
1146                 c->y = c->oldy = (c->mon->wh - wa->height) / 2;
1147         } else {
1148                 c->x = c->oldx = wa->x;
1149                 c->y = c->oldy = wa->y;
1150         }
1151         c->w = c->oldw = wa->width;
1152         c->h = c->oldh = wa->height;
1153         c->oldbw = wa->border_width;
1154
1155         if(c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
1156                 c->x = c->mon->mx + c->mon->mw - WIDTH(c);
1157         if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
1158                 c->y = c->mon->my + c->mon->mh - HEIGHT(c);
1159         c->x = MAX(c->x, c->mon->mx);
1160         /* only fix client y-offset, if the client center might cover the bar */
1161         c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 2) >= c->mon->wx)
1162                    && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
1163         c->bw = borderpx;
1164
1165         wc.border_width = c->bw;
1166         XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1167         XSetWindowBorder(dpy, w, scheme[SchemeNorm].border->rgb);
1168         configure(c); /* propagates border_width, if size doesn't change */
1169         updatewindowtype(c);
1170         updatesizehints(c);
1171         updatewmhints(c);
1172         XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
1173         grabbuttons(c, False);
1174         if(!c->isfloating)
1175                 c->isfloating = c->oldstate = trans != None || c->isfixed;
1176         if(c->isfloating)
1177                 XRaiseWindow(dpy, c->win);
1178         attach(c);
1179         attachstack(c);
1180         XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
1181                         (unsigned char *) &(c->win), 1);
1182         XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
1183         setclientstate(c, NormalState);
1184         if (c->mon == selmon)
1185                 unfocus(selmon->sel, False);
1186         c->mon->sel = c;
1187         arrange(c->mon);
1188         XMapWindow(dpy, c->win);
1189         focus(c);
1190         if(key_buffering) {
1191                 key_buffering = False;
1192                 XAllowEvents(dpy, AsyncKeyboard, CurrentTime);
1193         }
1194 }
1195
1196 void
1197 mappingnotify(XEvent *e) {
1198         XMappingEvent *ev = &e->xmapping;
1199         // fprintf(stderr, "MapNotify\n");
1200
1201         XRefreshKeyboardMapping(ev);
1202         if(ev->request == MappingKeyboard)
1203                 grabkeys();
1204 }
1205
1206 void
1207 maprequest(XEvent *e) {
1208         static XWindowAttributes wa;
1209         XMapRequestEvent *ev = &e->xmaprequest;
1210
1211         // fprintf(stderr, "MapRequest\n");
1212         if(!XGetWindowAttributes(dpy, ev->window, &wa))
1213                 return;
1214         if(wa.override_redirect) {
1215                 return;
1216         }
1217         if(!wintoclient(ev->window))
1218                 manage(ev->window, &wa);
1219 }
1220
1221 void
1222 monocle(Monitor *m) {
1223         unsigned int n = 0;
1224         Client *c;
1225
1226         for(c = m->clients; c; c = c->next)
1227                 if(ISVISIBLE(c))
1228                         n++;
1229         if(n > 0) /* override layout symbol */
1230                 snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
1231         for(c = snexttiled(m->stack); c; c = snexttiled(c->snext)) {
1232                 if (c == m->sel) {
1233                         resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, False, 0);
1234                 } else {
1235                         // this window is should not be visible. move off top, but don't change h/w
1236                         resize(c, m->wx, m->wy - 4000, c->w, c->h, False, 0);
1237                 }
1238         }
1239 }
1240
1241 void
1242 motionnotify(XEvent *e) {
1243         static Monitor *mon = NULL;
1244         Monitor *m;
1245         XMotionEvent *ev = &e->xmotion;
1246
1247         if(ev->window != root)
1248                 return;
1249         if((m = recttomon(ev->x_root, ev->y_root, 1, 1)) != mon && mon) {
1250                 unfocus(selmon->sel, True);
1251                 selmon = m;
1252                 focus(NULL);
1253         }
1254         mon = m;
1255 }
1256
1257 void
1258 movemouse(const Arg *arg) {
1259         int x, y, ocx, ocy, nx, ny;
1260         Client *c;
1261         Monitor *m;
1262         XEvent ev;
1263         Time lasttime = 0;
1264
1265         if(!(c = selmon->sel))
1266                 return;
1267         if(c->isfullscreen) /* no support moving fullscreen windows by mouse */
1268                 return;
1269         restack(selmon);
1270         ocx = c->x;
1271         ocy = c->y;
1272         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1273         None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
1274                 return;
1275         if(!getrootptr(&x, &y))
1276                 return;
1277         do {
1278                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1279                 switch(ev.type) {
1280                 case ConfigureRequest:
1281                 case Expose:
1282                 case MapRequest:
1283                         handler[ev.type](&ev);
1284                         break;
1285                 case MotionNotify:
1286                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1287                                 continue;
1288                         lasttime = ev.xmotion.time;
1289
1290                         nx = ocx + (ev.xmotion.x - x);
1291                         ny = ocy + (ev.xmotion.y - y);
1292                         if(nx >= selmon->wx && nx <= selmon->wx + selmon->ww
1293                         && ny >= selmon->wy && ny <= selmon->wy + selmon->wh) {
1294                                 if(abs(selmon->wx - nx) < snap)
1295                                         nx = selmon->wx;
1296                                 else if(abs((selmon->wx + selmon->ww) - (nx + WIDTH(c))) < snap)
1297                                         nx = selmon->wx + selmon->ww - WIDTH(c);
1298                                 if(abs(selmon->wy - ny) < snap)
1299                                         ny = selmon->wy;
1300                                 else if(abs((selmon->wy + selmon->wh) - (ny + HEIGHT(c))) < snap)
1301                                         ny = selmon->wy + selmon->wh - HEIGHT(c);
1302                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1303                                 && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
1304                                         togglefloating(NULL);
1305                         }
1306                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1307                                 resize(c, nx, ny, c->w, c->h, True, 0);
1308                         break;
1309                 }
1310         } while(ev.type != ButtonRelease);
1311         XUngrabPointer(dpy, CurrentTime);
1312         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1313                 sendmon(c, m);
1314                 selmon = m;
1315                 focus(NULL);
1316         }
1317 }
1318
1319 Client *
1320 nexttiled(Client *c) {
1321         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
1322         return c;
1323 }
1324
1325 Client *
1326 snexttiled(Client *c) {
1327         for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->snext);
1328         return c;
1329 }
1330
1331 Client *
1332 nextvisible(Client *c) {
1333         for(; c && !ISVISIBLE(c); c = c->next);
1334         return c;
1335 }
1336
1337 void
1338 pop(Client *c) {
1339         detach(c);
1340         attach_as_master(c);
1341         focus(c);
1342         arrange(c->mon);
1343 }
1344
1345 void
1346 propertynotify(XEvent *e) {
1347         Client *c;
1348         Window trans;
1349         XPropertyEvent *ev = &e->xproperty;
1350
1351         if((ev->window == root) && (ev->atom == XA_WM_NAME))
1352                 updatestatus();
1353         else if(ev->state == PropertyDelete)
1354                 return; /* ignore */
1355         else if((c = wintoclient(ev->window))) {
1356                 switch(ev->atom) {
1357                 default: break;
1358                 case XA_WM_TRANSIENT_FOR:
1359                         if(!c->isfloating && (XGetTransientForHint(dpy, c->win, &trans)) &&
1360                            (c->isfloating = (wintoclient(trans)) != NULL))
1361                                 arrange(c->mon);
1362                         break;
1363                 case XA_WM_NORMAL_HINTS:
1364                         updatesizehints(c);
1365                         break;
1366                 case XA_WM_HINTS:
1367                         updatewmhints(c);
1368                         drawbars();
1369                         break;
1370                 }
1371                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1372                         updatetitle(c);
1373                         if(c == c->mon->sel)
1374                                 drawbar(c->mon);
1375                 }
1376                 if(ev->atom == netatom[NetWMWindowType])
1377                         updatewindowtype(c);
1378         }
1379 }
1380
1381 void
1382 quit(const Arg *arg) {
1383         running = False;
1384 }
1385
1386 Monitor *
1387 recttomon(int x, int y, int w, int h) {
1388         Monitor *m, *r = selmon;
1389         int a, area = 0;
1390
1391         for(m = mons; m; m = m->next)
1392                 if((a = INTERSECT(x, y, w, h, m)) > area) {
1393                         area = a;
1394                         r = m;
1395                 }
1396         return r;
1397 }
1398
1399 void
1400 resize(Client *c, int x, int y, int w, int h, Bool interact, Client *base) {
1401         if(applysizehints(c, &x, &y, &w, &h, interact))
1402                 resizeclient(c, x, y, w, h, base);
1403 }
1404
1405 void
1406 resizeclient(Client *c, int x, int y, int w, int h, Client *base) {
1407         XWindowChanges wc;
1408         unsigned long mask = CWX|CWY|CWWidth|CWHeight|CWBorderWidth;
1409
1410         c->oldx = c->x; c->x = wc.x = x;
1411         c->oldy = c->y; c->y = wc.y = y;
1412         c->oldw = c->w; c->w = wc.width = w;
1413         c->oldh = c->h; c->h = wc.height = h;
1414         // base = 0;
1415         if (base) {
1416                 wc.stack_mode = Above;
1417                 wc.sibling = base->win;
1418                 mask |= CWStackMode|CWSibling;
1419         }
1420         wc.border_width = c->bw;
1421         XConfigureWindow(dpy, c->win, mask, &wc);
1422         configure(c);
1423         XSync(dpy, False);
1424 }
1425
1426 void
1427 resizemouse(const Arg *arg) {
1428         int ocx, ocy, nw, nh;
1429         Client *c;
1430         Monitor *m;
1431         XEvent ev;
1432         Time lasttime = 0;
1433
1434         if(!(c = selmon->sel))
1435                 return;
1436         if(c->isfullscreen) /* no support resizing fullscreen windows by mouse */
1437                 return;
1438         restack(selmon);
1439         ocx = c->x;
1440         ocy = c->y;
1441         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1442                         None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
1443                 return;
1444         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1445         do {
1446                 XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
1447                 switch(ev.type) {
1448                 case ConfigureRequest:
1449                 case Expose:
1450                 case MapRequest:
1451                         handler[ev.type](&ev);
1452                         break;
1453                 case MotionNotify:
1454                         if ((ev.xmotion.time - lasttime) <= (1000 / 60))
1455                                 continue;
1456                         lasttime = ev.xmotion.time;
1457
1458                         nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
1459                         nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
1460                         if(c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
1461                         && c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
1462                         {
1463                                 if(!c->isfloating && selmon->lt[selmon->sellt]->arrange
1464                                 && (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
1465                                         togglefloating(NULL);
1466                         }
1467                         if(!selmon->lt[selmon->sellt]->arrange || c->isfloating)
1468                                 resize(c, c->x, c->y, nw, nh, True, 0);
1469                         break;
1470                 }
1471         } while(ev.type != ButtonRelease);
1472         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
1473         XUngrabPointer(dpy, CurrentTime);
1474         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1475         if((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
1476                 sendmon(c, m);
1477                 selmon = m;
1478                 focus(NULL);
1479         }
1480 }
1481
1482 void
1483 restack(Monitor *m) {
1484         Client *c;
1485         XEvent ev;
1486         XWindowChanges wc;
1487
1488         drawbar(m);
1489         if(!m->sel)
1490                 return;
1491         if(m->sel->isfloating || !m->lt[m->sellt]->arrange)
1492                 XRaiseWindow(dpy, m->sel->win);
1493         if(m->lt[m->sellt]->arrange) {
1494                 wc.stack_mode = Below;
1495                 wc.sibling = m->barwin;
1496                 for(c = m->clients; c; c = c->next)
1497                         if(!c->isfloating && ISVISIBLE(c)) {
1498                                 XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
1499                                 wc.sibling = c->win;
1500                                 wc.stack_mode = Above;
1501                         }
1502         }
1503         XSync(dpy, False);
1504         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1505 }
1506
1507 void
1508 run(void) {
1509         XEvent ev;
1510         /* main event loop */
1511         XSync(dpy, False);
1512         while(running && !XNextEvent(dpy, &ev)) {
1513                 if(handler[ev.type]) {
1514                         // fprintf(stderr, "handling event type %i\n", ev.type);
1515                         handler[ev.type](&ev); /* call handler */
1516                 } else {
1517                         // fprintf(stderr, "evt type %i\n", ev.type);
1518                 }
1519         }
1520 }
1521
1522 void
1523 scan(void) {
1524         unsigned int i, num;
1525         Window d1, d2, *wins = NULL;
1526         XWindowAttributes wa;
1527
1528         if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1529                 for(i = 0; i < num; i++) {
1530                         if(!XGetWindowAttributes(dpy, wins[i], &wa)
1531                         || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1532                                 continue;
1533                         if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1534                                 manage(wins[i], &wa);
1535                 }
1536                 for(i = 0; i < num; i++) { /* now the transients */
1537                         if(!XGetWindowAttributes(dpy, wins[i], &wa))
1538                                 continue;
1539                         if(XGetTransientForHint(dpy, wins[i], &d1)
1540                         && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1541                                 manage(wins[i], &wa);
1542                 }
1543                 if(wins)
1544                         XFree(wins);
1545         }
1546 }
1547
1548 void
1549 sendmon(Client *c, Monitor *m) {
1550         if(c->mon == m)
1551                 return;
1552         unfocus(c, True);
1553         detachstack(c);
1554         detach(c);
1555         c->mon = m;
1556         c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
1557         attach(c);
1558         attachstack(c);
1559         focus(NULL);
1560         arrange(NULL);
1561 }
1562
1563 void
1564 setclientstate(Client *c, long state) {
1565         long data[] = { state, None };
1566
1567         XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1568                         PropModeReplace, (unsigned char *)data, 2);
1569 }
1570
1571 Bool
1572 sendevent(Client *c, Atom proto) {
1573         int n;
1574         Atom *protocols;
1575         Bool exists = False;
1576         XEvent ev;
1577
1578         if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
1579                 while(!exists && n--)
1580                         exists = protocols[n] == proto;
1581                 XFree(protocols);
1582         }
1583         if(exists) {
1584                 ev.type = ClientMessage;
1585                 ev.xclient.window = c->win;
1586                 ev.xclient.message_type = wmatom[WMProtocols];
1587                 ev.xclient.format = 32;
1588                 ev.xclient.data.l[0] = proto;
1589                 ev.xclient.data.l[1] = CurrentTime;
1590                 XSendEvent(dpy, c->win, False, NoEventMask, &ev);
1591         }
1592         return exists;
1593 }
1594
1595 void
1596 setfocus(Client *c) {
1597         if(!c->neverfocus) {
1598                 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
1599                 XChangeProperty(dpy, root, netatom[NetActiveWindow],
1600                                 XA_WINDOW, 32, PropModeReplace,
1601                                 (unsigned char *) &(c->win), 1);
1602         }
1603         sendevent(c, wmatom[WMTakeFocus]);
1604 }
1605
1606 void
1607 setfullscreen(Client *c, Bool fullscreen) {
1608         if(fullscreen) {
1609                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1610                                 PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
1611                 c->isfullscreen = True;
1612                 c->oldstate = c->isfloating;
1613                 c->oldbw = c->bw;
1614                 c->bw = 0;
1615                 c->isfloating = True;
1616                 resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh, 0);
1617                 XRaiseWindow(dpy, c->win);
1618         }
1619         else {
1620                 XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
1621                                 PropModeReplace, (unsigned char*)0, 0);
1622                 c->isfullscreen = False;
1623                 c->isfloating = c->oldstate;
1624                 c->bw = c->oldbw;
1625                 c->x = c->oldx;
1626                 c->y = c->oldy;
1627                 c->w = c->oldw;
1628                 c->h = c->oldh;
1629                 resizeclient(c, c->x, c->y, c->w, c->h, 0);
1630                 arrange(c->mon);
1631         }
1632 }
1633
1634 void
1635 setlayout(const Arg *arg) {
1636         if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
1637                 selmon->sellt ^= 1;
1638         if(arg && arg->v)
1639                 selmon->lt[selmon->sellt] = (Layout *)arg->v;
1640         strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
1641         if(selmon->sel)
1642                 arrange(selmon);
1643         else
1644                 drawbar(selmon);
1645 }
1646
1647 /* arg > 1.0 will set mfact absolutly */
1648 void
1649 setmfact(const Arg *arg) {
1650         float f;
1651
1652         if(!arg || !selmon->lt[selmon->sellt]->arrange)
1653                 return;
1654         f = arg->f < 1.0 ? arg->f + selmon->mfact : arg->f - 1.0;
1655         if(f < 0.1 || f > 0.9)
1656                 return;
1657         selmon->mfact = f;
1658         arrange(selmon);
1659 }
1660
1661 void
1662 setup(void) {
1663         XSetWindowAttributes wa;
1664
1665         /* clean up any zombies immediately */
1666         sigchld(0);
1667
1668         /* init screen */
1669         screen = DefaultScreen(dpy);
1670         root = RootWindow(dpy, screen);
1671         fnt = drw_font_create(dpy, font);
1672         sw = DisplayWidth(dpy, screen);
1673         sh = DisplayHeight(dpy, screen);
1674         bh = fnt->h + 2;
1675         drw = drw_create(dpy, screen, root, sw, sh);
1676         drw_setfont(drw, fnt);
1677         updategeom();
1678         /* init atoms */
1679         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1680         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1681         wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1682         wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
1683         netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
1684         netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1685         netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1686         netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1687         netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
1688         netatom[NetWMWindowOpacity] = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
1689         netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
1690         netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
1691         netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
1692         netatom[NetSupportingWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
1693         XInternAtom(dpy, "_MOTIF_WM_HINTS", False); /* clients may request borderless/fullscreen */
1694         /* init cursors */
1695         cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
1696         cursor[CurResize] = drw_cur_create(drw, XC_sizing);
1697         cursor[CurMove] = drw_cur_create(drw, XC_fleur);
1698         /* init appearance */
1699         scheme[SchemeNorm].border = drw_clr_create(drw, normbordercolor);
1700         scheme[SchemeNorm].bg = drw_clr_create(drw, normbgcolor);
1701         scheme[SchemeNorm].fg = drw_clr_create(drw, normfgcolor);
1702         scheme[SchemeSel].border = drw_clr_create(drw, selbordercolor);
1703         scheme[SchemeSel].bg = drw_clr_create(drw, selbgcolor);
1704         scheme[SchemeSel].fg = drw_clr_create(drw, selfgcolor);
1705         /* init bars */
1706         updatebars();
1707         updatestatus();
1708         /* EWMH support per view */
1709         XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1710                         PropModeReplace, (unsigned char *) netatom, NetLast);
1711         XDeleteProperty(dpy, root, netatom[NetClientList]);
1712         /* select for events */
1713         wa.cursor = cursor[CurNormal]->cursor;
1714         wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask|PointerMotionMask
1715                         |EnterWindowMask|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
1716         XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
1717         XSelectInput(dpy, root, wa.event_mask);
1718         grabkeys();
1719         focus(NULL);
1720 }
1721
1722 void
1723 showhide(Client *c) {
1724         if(!c)
1725                 return;
1726         if(ISVISIBLE(c)) { /* show clients top down */
1727                 XMoveWindow(dpy, c->win, c->x, c->y);
1728                 if((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
1729                         resize(c, c->x, c->y, c->w, c->h, False, 0);
1730                 showhide(c->snext);
1731         }
1732         else { /* hide clients bottom up */
1733                 showhide(c->snext);
1734                 XMoveWindow(dpy, c->win, WIDTH(c) * -2, c->y);
1735         }
1736 }
1737
1738 void
1739 sigchld(int unused) {
1740         if(signal(SIGCHLD, sigchld) == SIG_ERR)
1741                 die("Can't install SIGCHLD handler");
1742         while(0 < waitpid(-1, NULL, WNOHANG));
1743 }
1744
1745 void
1746 kbspawn(const Arg *arg) {
1747         key_buffering = True;
1748         spawn(arg);
1749 }
1750
1751 void
1752 spawn(const Arg *arg) {
1753         int tag = 0, i;
1754         if(arg->v == termcmd) {
1755                 for(i = 0; i < 32; ++i) {
1756                         if(selmon->tagset[selmon->seltags] & (1 << i)) {
1757                                 tag = i;
1758                                 break;
1759                         }
1760                 }
1761                 WORKSPACE_NUMBER[17] = workspace_numbers_str[tag][0];
1762                 WORKSPACE_NUMBER[18] = workspace_numbers_str[tag][1];
1763         }
1764         if(arg->v == dmenucmd)
1765                 dmenumon[0] = '0' + selmon->num;
1766         if(fork() == 0) {
1767                 if(dpy)
1768                         close(ConnectionNumber(dpy));
1769                 setsid();
1770                 execvp(((char **)arg->v)[0], (char **)arg->v);
1771                 fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
1772                 perror(" failed");
1773                 exit(EXIT_SUCCESS);
1774         }
1775 }
1776
1777 void
1778 tag(const Arg *arg) {
1779         if(selmon->sel && arg->ui & TAGMASK) {
1780                 selmon->sel->tags = arg->ui & TAGMASK;
1781                 focus(NULL);
1782                 arrange(selmon);
1783         }
1784 }
1785
1786 void
1787 tagmon(const Arg *arg) {
1788         if(!selmon->sel || !mons->next)
1789                 return;
1790         sendmon(selmon->sel, dirtomon(arg->i));
1791 }
1792
1793 void
1794 tile(Monitor *m) {
1795         unsigned int i, n, h, mw, my, ty;
1796         Client *c;
1797
1798         for(n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
1799         if(n == 0)
1800                 return;
1801
1802         if(n > m->nmaster)
1803                 mw = m->nmaster ? m->ww * m->mfact : 0;
1804         else {
1805                 c = nexttiled(m->clients);
1806                 if (c && !c->screen_hog)
1807                         mw = m->ww * m->mfact;
1808                 else
1809                         mw = m->ww;
1810         }
1811         for(i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
1812                 if(i < m->nmaster) {
1813                         h = (m->wh - my) / (MIN(n, m->nmaster) - i);
1814                         resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), False, 0);
1815                         my += HEIGHT(c);
1816                 }
1817                 else {
1818                         h = (m->wh - ty) / (n - i);
1819                         resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), False, 0);
1820                         ty += HEIGHT(c);
1821                 }
1822 }
1823
1824 #define TAB_HEIGHT 19
1825 #define TAB_PAD     7
1826
1827 void
1828 jason_layout(Monitor *m) {
1829         unsigned int i, tiled_count, mw, right_width, tab_counts[2] = {0,0}, cur_tab = 0, *tab_count;
1830         int tab_top;
1831         Client *c, *vis_slave = 0, *base = 0;
1832
1833         tab_count = &(tab_counts[0]);
1834
1835         for(tiled_count = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), tiled_count++) {
1836                 if (tiled_count == 0) { // master
1837                         if (c->next) {
1838                                 if (m->sel && (m->sel == c || m->sel->isfloating || !ISVISIBLE(m->sel))) {
1839                                         vis_slave = nexttiled(c->next);
1840                                 } else {
1841                                         vis_slave = m->sel;
1842                                 }
1843                         }
1844                 } else {
1845                         if (c == vis_slave) {
1846                                 tab_count = &(tab_counts[1]);
1847                         } else {
1848                                 (*tab_count) += 1;
1849                         }
1850                 }
1851         }
1852         if(tiled_count == 0) {
1853                 return;
1854         }
1855
1856         if(tiled_count > 1 || (tiled_count == 1 && !nexttiled(m->clients)->screen_hog)) {
1857                 mw = m->ww * m->mfact;
1858         } else {
1859                 mw = m->ww;
1860         }
1861         right_width = m->ww - mw;
1862         tab_count = &(tab_counts[0]);
1863         tab_top = m->wy - (m->wh - (2 * (TAB_HEIGHT + TAB_PAD))) + TAB_HEIGHT;
1864         for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++) {
1865                 if (i == 0) {
1866                         resize(c, m->wx, m->wy, mw, m->wh, False, 0);
1867                 } else {
1868                         if (c == vis_slave) {
1869                                 resize(c, m->wx + mw, m->wy + TAB_HEIGHT + TAB_PAD, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1870                                 tab_count = &(tab_counts[1]);
1871                                 tab_top = m->wy + m->wh - TAB_HEIGHT;
1872                                 cur_tab = 0;
1873                         } else {
1874                                 // this function does not get called when focus changes
1875                                 // resize(c, m->wx + m->ww, m->wy, m->ww - mw, m->wh, False);
1876                                 resize(c, m->wx + mw + right_width * cur_tab / (*tab_count), tab_top, right_width, m->wh - 2 * (TAB_HEIGHT + TAB_PAD), False, base);
1877                                 cur_tab += 1;
1878                         }
1879                 }
1880                 base = c;
1881         }
1882 }
1883
1884 void
1885 togglebar(const Arg *arg) {
1886         selmon->showbar = !selmon->showbar;
1887         updatebarpos(selmon);
1888         XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
1889         arrange(selmon);
1890 }
1891
1892 void
1893 togglefloating(const Arg *arg) {
1894         if(!selmon->sel)
1895                 return;
1896         if(selmon->sel->isfullscreen) /* no support for fullscreen windows */
1897                 return;
1898         selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
1899         if(selmon->sel->isfloating)
1900                 resize(selmon->sel, selmon->sel->x, selmon->sel->y,
1901                        selmon->sel->w, selmon->sel->h, False, 0);
1902         arrange(selmon);
1903 }
1904
1905 void
1906 toggletag(const Arg *arg) {
1907         unsigned int newtags;
1908
1909         if(!selmon->sel)
1910                 return;
1911         newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
1912         if(newtags) {
1913                 selmon->sel->tags = newtags;
1914                 focus(NULL);
1915                 arrange(selmon);
1916         }
1917 }
1918
1919 void
1920 toggleview(const Arg *arg) {
1921         unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
1922
1923         if(newtagset) {
1924                 selmon->tagset[selmon->seltags] = newtagset;
1925                 focus(NULL);
1926                 arrange(selmon);
1927         }
1928 }
1929
1930 void
1931 unfocus(Client *c, Bool setfocus) {
1932         if(!c)
1933                 return;
1934         grabbuttons(c, False);
1935         XSetWindowBorder(dpy, c->win, scheme[SchemeNorm].border->rgb);
1936         if(setfocus) {
1937                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
1938                 XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
1939         }
1940 }
1941
1942 void
1943 unmanage(Client *c, Bool destroyed) {
1944         Monitor *m = c->mon;
1945         XWindowChanges wc;
1946
1947         /* The server grab construct avoids race conditions. */
1948         detachstack(c);
1949         detach(c);
1950         if(!destroyed) {
1951                 wc.border_width = c->oldbw;
1952                 XGrabServer(dpy);
1953                 XSetErrorHandler(xerrordummy);
1954                 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1955                 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1956                 setclientstate(c, WithdrawnState);
1957                 XSync(dpy, False);
1958                 XSetErrorHandler(xerror);
1959                 XUngrabServer(dpy);
1960         }
1961         free(c);
1962         focus(selmon ? selmon->sel : NULL);
1963         updateclientlist();
1964         arrange(m);
1965 }
1966
1967 void
1968 unmapnotify(XEvent *e) {
1969         Client *c;
1970         XUnmapEvent *ev = &e->xunmap;
1971
1972         if((c = wintoclient(ev->window))) {
1973                 if(ev->send_event)
1974                         setclientstate(c, WithdrawnState);
1975                 else
1976                         unmanage(c, False);
1977         }
1978 }
1979
1980 void
1981 updatebars(void) {
1982         Monitor *m;
1983         XSetWindowAttributes wa = {
1984                 .override_redirect = True,
1985                 .background_pixmap = ParentRelative,
1986                 .event_mask = ButtonPressMask|ExposureMask
1987         };
1988         for(m = mons; m; m = m->next) {
1989                 if (m->barwin)
1990                         continue;
1991                 m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
1992                                           CopyFromParent, DefaultVisual(dpy, screen),
1993                                           CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
1994                 XChangeProperty(dpy, root, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
1995                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
1996                 XChangeProperty(dpy, m->barwin, netatom[NetSupportingWMCheck], XA_WINDOW, 32,
1997                                 PropModeReplace, (unsigned char *) &(m->barwin), 1);
1998                 XChangeProperty(dpy, m->barwin, netatom[NetWMName], XA_STRING, 8,
1999                                 PropModeReplace, (unsigned char *) "dwm", 3);
2000                 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
2001                 XMapRaised(dpy, m->barwin);
2002         }
2003 }
2004
2005 void
2006 updatebarpos(Monitor *m) {
2007         m->wy = m->my;
2008         m->wh = m->mh;
2009         if(m->showbar) {
2010                 m->wh -= bh;
2011                 m->by = m->topbar ? m->wy : m->wy + m->wh;
2012                 m->wy = m->topbar ? m->wy + bh : m->wy;
2013         }
2014         else
2015                 m->by = -bh;
2016 }
2017
2018 void
2019 updateclientlist() {
2020         Client *c;
2021         Monitor *m;
2022
2023         XDeleteProperty(dpy, root, netatom[NetClientList]);
2024         for(m = mons; m; m = m->next)
2025                 for(c = m->clients; c; c = c->next)
2026                         XChangeProperty(dpy, root, netatom[NetClientList],
2027                                         XA_WINDOW, 32, PropModeAppend,
2028                                         (unsigned char *) &(c->win), 1);
2029 }
2030
2031 Bool
2032 updategeom(void) {
2033         Bool dirty = False;
2034
2035 #ifdef XINERAMA
2036         if(XineramaIsActive(dpy)) {
2037                 int i, j, n, nn;
2038                 Client *c;
2039                 Monitor *m;
2040                 XineramaScreenInfo *info = XineramaQueryScreens(dpy, &nn);
2041                 XineramaScreenInfo *unique = NULL;
2042
2043                 for(n = 0, m = mons; m; m = m->next, n++);
2044                 /* only consider unique geometries as separate screens */
2045                 if(!(unique = (XineramaScreenInfo *)malloc(sizeof(XineramaScreenInfo) * nn)))
2046                         die("fatal: could not malloc() %u bytes\n", sizeof(XineramaScreenInfo) * nn);
2047                 for(i = 0, j = 0; i < nn; i++)
2048                         if(isuniquegeom(unique, j, &info[i]))
2049                                 memcpy(&unique[j++], &info[i], sizeof(XineramaScreenInfo));
2050                 XFree(info);
2051                 nn = j;
2052                 if(n <= nn) {
2053                         for(i = 0; i < (nn - n); i++) { /* new monitors available */
2054                                 for(m = mons; m && m->next; m = m->next);
2055                                 if(m)
2056                                         m->next = createmon();
2057                                 else
2058                                         mons = createmon();
2059                         }
2060                         for(i = 0, m = mons; i < nn && m; m = m->next, i++)
2061                                 if(i >= n
2062                                 || (unique[i].x_org != m->mx || unique[i].y_org != m->my
2063                                     || unique[i].width != m->mw || unique[i].height != m->mh))
2064                                 {
2065                                         dirty = True;
2066                                         m->num = i;
2067                                         m->mx = m->wx = unique[i].x_org;
2068                                         m->my = m->wy = unique[i].y_org;
2069                                         m->mw = m->ww = unique[i].width;
2070                                         m->mh = m->wh = unique[i].height;
2071                                         updatebarpos(m);
2072                                 }
2073                 }
2074                 else { /* less monitors available nn < n */
2075                         for(i = nn; i < n; i++) {
2076                                 for(m = mons; m && m->next; m = m->next);
2077                                 while(m->clients) {
2078                                         dirty = True;
2079                                         c = m->clients;
2080                                         m->clients = c->next;
2081                                         detachstack(c);
2082                                         c->mon = mons;
2083                                         attach(c);
2084                                         attachstack(c);
2085                                 }
2086                                 if(m == selmon)
2087                                         selmon = mons;
2088                                 cleanupmon(m);
2089                         }
2090                 }
2091                 free(unique);
2092         }
2093         else
2094 #endif /* XINERAMA */
2095         /* default monitor setup */
2096         {
2097                 if(!mons)
2098                         mons = createmon();
2099                 if(mons->mw != sw || mons->mh != sh) {
2100                         dirty = True;
2101                         mons->mw = mons->ww = sw;
2102                         mons->mh = mons->wh = sh;
2103                         updatebarpos(mons);
2104                 }
2105         }
2106         if(dirty) {
2107                 selmon = mons;
2108                 selmon = wintomon(root);
2109         }
2110         return dirty;
2111 }
2112
2113 void
2114 updatenumlockmask(void) {
2115         unsigned int i, j;
2116         XModifierKeymap *modmap;
2117
2118         numlockmask = 0;
2119         modmap = XGetModifierMapping(dpy);
2120         for(i = 0; i < 8; i++)
2121                 for(j = 0; j < modmap->max_keypermod; j++)
2122                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
2123                            == XKeysymToKeycode(dpy, XK_Num_Lock))
2124                                 numlockmask = (1 << i);
2125         XFreeModifiermap(modmap);
2126 }
2127
2128 void
2129 updatesizehints(Client *c) {
2130         long msize;
2131         XSizeHints size;
2132
2133         if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
2134                 /* size is uninitialized, ensure that size.flags aren't used */
2135                 size.flags = PSize;
2136         if(size.flags & PBaseSize) {
2137                 c->basew = size.base_width;
2138                 c->baseh = size.base_height;
2139         }
2140         else if(size.flags & PMinSize) {
2141                 c->basew = size.min_width;
2142                 c->baseh = size.min_height;
2143         }
2144         else
2145                 c->basew = c->baseh = 0;
2146         if(size.flags & PResizeInc) {
2147                 c->incw = size.width_inc;
2148                 c->inch = size.height_inc;
2149         }
2150         else
2151                 c->incw = c->inch = 0;
2152         if(size.flags & PMaxSize) {
2153                 c->maxw = size.max_width;
2154                 c->maxh = size.max_height;
2155         }
2156         else
2157                 c->maxw = c->maxh = 0;
2158         if(size.flags & PMinSize) {
2159                 c->minw = size.min_width;
2160                 c->minh = size.min_height;
2161         }
2162         else if(size.flags & PBaseSize) {
2163                 c->minw = size.base_width;
2164                 c->minh = size.base_height;
2165         }
2166         else
2167                 c->minw = c->minh = 0;
2168         if(size.flags & PAspect) {
2169                 c->mina = (float)size.min_aspect.y / size.min_aspect.x;
2170                 c->maxa = (float)size.max_aspect.x / size.max_aspect.y;
2171         }
2172         else
2173                 c->maxa = c->mina = 0.0;
2174         c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
2175                      && c->maxw == c->minw && c->maxh == c->minh);
2176 }
2177
2178 void
2179 updatetitle(Client *c) {
2180         if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
2181                 gettextprop(c->win, XA_WM_NAME, c->name, sizeof c->name);
2182         if(c->name[0] == '\0') /* hack to mark broken clients */
2183                 strcpy(c->name, broken);
2184 }
2185
2186 void
2187 updatestatus(void) {
2188         if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
2189                 strcpy(stext, "dwm-"VERSION);
2190         drawbar(selmon);
2191 }
2192
2193 void
2194 updatewindowtype(Client *c) {
2195         Atom state = getatomprop(c, netatom[NetWMState]);
2196         Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
2197
2198         if(state == netatom[NetWMFullscreen])
2199                 setfullscreen(c, True);
2200         if(wtype == netatom[NetWMWindowTypeDialog])
2201                 c->isfloating = True;
2202 }
2203
2204 void
2205 updatewmhints(Client *c) {
2206         XWMHints *wmh;
2207
2208         if((wmh = XGetWMHints(dpy, c->win))) {
2209                 if(c == selmon->sel && wmh->flags & XUrgencyHint) {
2210                         wmh->flags &= ~XUrgencyHint;
2211                         XSetWMHints(dpy, c->win, wmh);
2212                 }
2213                 else
2214                         c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
2215                 if(wmh->flags & InputHint)
2216                         c->neverfocus = !wmh->input;
2217                 else
2218                         c->neverfocus = False;
2219                 XFree(wmh);
2220         }
2221 }
2222
2223 void
2224 view(const Arg *arg) {
2225         if((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
2226                 return;
2227         selmon->seltags ^= 1; /* toggle sel tagset */
2228         if(arg->ui & TAGMASK)
2229                 selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
2230         focus(NULL);
2231         arrange(selmon);
2232 }
2233
2234 Client *
2235 wintoclient(Window w) {
2236         Client *c;
2237         Monitor *m;
2238
2239         for(m = mons; m; m = m->next)
2240                 for(c = m->clients; c; c = c->next)
2241                         if(c->win == w)
2242                                 return c;
2243         return NULL;
2244 }
2245
2246 Monitor *
2247 wintomon(Window w) {
2248         int x, y;
2249         Client *c;
2250         Monitor *m;
2251
2252         if(w == root && getrootptr(&x, &y))
2253                 return recttomon(x, y, 1, 1);
2254         for(m = mons; m; m = m->next)
2255                 if(w == m->barwin)
2256                         return m;
2257         if((c = wintoclient(w)))
2258                 return c->mon;
2259         return selmon;
2260 }
2261
2262 /* There's no way to check accesses to destroyed windows, thus those cases are
2263  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
2264  * default error handler, which may call exit.  */
2265 int
2266 xerror(Display *dpy, XErrorEvent *ee) {
2267         if(ee->error_code == BadWindow
2268         || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
2269         || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
2270         || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
2271         || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
2272         || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
2273         || (ee->request_code == X_GrabButton && ee->error_code == BadAccess)
2274         || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
2275         || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
2276                 return 0;
2277         fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
2278                         ee->request_code, ee->error_code);
2279         return xerrorxlib(dpy, ee); /* may call exit */
2280 }
2281
2282 int
2283 xerrordummy(Display *dpy, XErrorEvent *ee) {
2284         return 0;
2285 }
2286
2287 /* Startup Error handler to check if another window manager
2288  * is already running. */
2289 int
2290 xerrorstart(Display *dpy, XErrorEvent *ee) {
2291         die("dwm: another window manager is already running\n");
2292         return -1;
2293 }
2294
2295 void
2296 zoom(const Arg *arg) {
2297         Client *c = selmon->sel;
2298
2299         if(!selmon->lt[selmon->sellt]->arrange
2300         || (selmon->sel && selmon->sel->isfloating))
2301                 return;
2302         if(c == nexttiled(selmon->clients))
2303                 if(!c || !(c = nexttiled(c->next)))
2304                         return;
2305         pop(c);
2306 }
2307
2308 int
2309 main(int argc, char *argv[]) {
2310         if(argc == 2 && !strcmp("-v", argv[1]))
2311                 die("dwm-"VERSION", © 2006-2014 dwm engineers, see LICENSE for details\n");
2312         else if(argc != 1)
2313                 die("usage: dwm [-v]\n");
2314         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
2315                 fputs("warning: no locale support\n", stderr);
2316         if(!(dpy = XOpenDisplay(NULL)))
2317                 die("dwm: cannot open display\n");
2318         checkotherwm();
2319         setup();
2320         scan();
2321         run();
2322         cleanup();
2323         XCloseDisplay(dpy);
2324         return EXIT_SUCCESS;
2325 }