tabbed.c

   1 /*
   2  * See LICENSE file for copyright and license details.
   3  */
   4
   5 #include <sys/wait.h>
   6 #include <locale.h>
   7 #include <signal.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <X11/Xatom.h>
  14 #include <X11/keysym.h>
  15 #include <X11/Xlib.h>
  16 #include <X11/Xproto.h>
  17 #include <X11/Xutil.h>
  18 #include <X11/XKBlib.h>
  19 #include <X11/Xft/Xft.h>
  20
  21 #include "arg.h"
  22
  23 /* XEMBED messages */
  24 #define XEMBED_EMBEDDED_NOTIFY          0
  25 #define XEMBED_WINDOW_ACTIVATE          1
  26 #define XEMBED_WINDOW_DEACTIVATE        2
  27 #define XEMBED_REQUEST_FOCUS            3
  28 #define XEMBED_FOCUS_IN                 4
  29 #define XEMBED_FOCUS_OUT                5
  30 #define XEMBED_FOCUS_NEXT               6
  31 #define XEMBED_FOCUS_PREV               7
  32 /* 8-9 were used for XEMBED_GRAB_KEY/XEMBED_UNGRAB_KEY */
  33 #define XEMBED_MODALITY_ON              10
  34 #define XEMBED_MODALITY_OFF             11
  35 #define XEMBED_REGISTER_ACCELERATOR     12
  36 #define XEMBED_UNREGISTER_ACCELERATOR   13
  37 #define XEMBED_ACTIVATE_ACCELERATOR     14
  38
  39 /* Details for  XEMBED_FOCUS_IN: */
  40 #define XEMBED_FOCUS_CURRENT            0
  41 #define XEMBED_FOCUS_FIRST              1
  42 #define XEMBED_FOCUS_LAST               2
  43
  44 /* Macros */
  45 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  46 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  47 #define LENGTH(x)               (sizeof((x)) / sizeof(*(x)))
  48 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  49 #define TEXTW(x)                (textnw(x, strlen(x)) + dc.font.height)
  50
  51 enum { ColFG, ColBG, ColLast };       /* color */
  52 enum { WMProtocols, WMDelete, WMName, WMState, WMFullscreen,
  53        XEmbed, WMSelectTab, WMLast }; /* default atoms */
  54
  55 typedef union {
  56         int i;
  57         const void *v;
  58 } Arg;
  59
  60 typedef struct {
  61         unsigned int mod;
  62         KeySym keysym;
  63         void (*func)(const Arg *);
  64         const Arg arg;
  65 } Key;
  66
  67 typedef struct {
  68         int x, y, w, h;
  69         XftColor norm[ColLast];
  70         XftColor sel[ColLast];
  71         XftColor urg[ColLast];
  72         Drawable drawable;
  73         GC gc;
  74         struct {
  75                 int ascent;
  76                 int descent;
  77                 int height;
  78                 XftFont *xfont;
  79         } font;
  80 } DC; /* draw context */
  81
  82 typedef struct {
  83         char name[256];
  84         Window win;
  85         int tabx;
  86         Bool urgent;
  87         Bool closed;
  88 } Client;
  89
  90 /* function declarations */
  91 static void buttonpress(const XEvent *e);
  92 static void cleanup(void);
  93 static void clientmessage(const XEvent *e);
  94 static void configurenotify(const XEvent *e);
  95 static void configurerequest(const XEvent *e);
  96 static void createnotify(const XEvent *e);
  97 static void destroynotify(const XEvent *e);
  98 static void die(const char *errstr, ...);
  99 static void drawbar(void);
 100 static void drawtext(const char *text, XftColor col[ColLast]);
 101 static void *ecalloc(size_t n, size_t size);
 102 static void *erealloc(void *o, size_t size);
 103 static void expose(const XEvent *e);
 104 static void focus(int c);
 105 static void focusin(const XEvent *e);
 106 static void focusonce(const Arg *arg);
 107 static void focusurgent(const Arg *arg);
 108 static void fullscreen(const Arg *arg);
 109 static char *getatom(int a);
 110 static int getclient(Window w);
 111 static XftColor getcolor(const char *colstr);
 112 static int getfirsttab(void);
 113 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 114 static void initfont(const char *fontstr);
 115 static Bool isprotodel(int c);
 116 static void keypress(const XEvent *e);
 117 static void killclient(const Arg *arg);
 118 static void manage(Window win);
 119 static void maprequest(const XEvent *e);
 120 static void move(const Arg *arg);
 121 static void movetab(const Arg *arg);
 122 static void propertynotify(const XEvent *e);
 123 static void resize(int c, int w, int h);
 124 static void rotate(const Arg *arg);
 125 static void run(void);
 126 static void sendxembed(int c, long msg, long detail, long d1, long d2);
 127 static void setcmd(int argc, char *argv[], int);
 128 static void setup(void);
 129 static void spawn(const Arg *arg);
 130 static int textnw(const char *text, unsigned int len);
 131 static void toggle(const Arg *arg);
 132 static void unmanage(int c);
 133 static void unmapnotify(const XEvent *e);
 134 static void updatenumlockmask(void);
 135 static void updatetitle(int c);
 136 static int xerror(Display *dpy, XErrorEvent *ee);
 137 static void xsettitle(Window w, const char *str);
 138
 139 /* variables */
 140 static int screen;
 141 static void (*handler[LASTEvent]) (const XEvent *) = {
 142         [ButtonPress] = buttonpress,
 143         [ClientMessage] = clientmessage,
 144         [ConfigureNotify] = configurenotify,
 145         [ConfigureRequest] = configurerequest,
 146         [CreateNotify] = createnotify,
 147         [UnmapNotify] = unmapnotify,
 148         [DestroyNotify] = destroynotify,
 149         [Expose] = expose,
 150         [FocusIn] = focusin,
 151         [KeyPress] = keypress,
 152         [MapRequest] = maprequest,
 153         [PropertyNotify] = propertynotify,
 154 };
 155 static int bh, obh, wx, wy, ww, wh;
 156 static unsigned int numlockmask;
 157 static Bool running = True, nextfocus, doinitspawn = True,
 158             fillagain = False, closelastclient = False,
 159             killclientsfirst = False;
 160 static Display *dpy;
 161 static DC dc;
 162 static Atom wmatom[WMLast];
 163 static Window root, win;
 164 static Client **clients;
 165 static int nclients, sel = -1, lastsel = -1;
 166 static int (*xerrorxlib)(Display *, XErrorEvent *);
 167 static int cmd_append_pos;
 168 static char winid[64];
 169 static char **cmd;
 170 static char *wmname = "tabbed";
 171 static const char *geometry;
 172
 173 char *argv0;
 174
 175 /* configuration, allows nested code to access above variables */
 176 #include "config.h"
 177
 178 void
 179 buttonpress(const XEvent *e)
 180 {
 181         const XButtonPressedEvent *ev = &e->xbutton;
 182         int i, fc;
 183         Arg arg;
 184
 185         if (ev->y < 0 || ev->y > bh)
 186                 return;
 187
 188         if (((fc = getfirsttab()) > 0 && ev->x < TEXTW(before)) || ev->x < 0)
 189                 return;
 190
 191         for (i = fc; i < nclients; i++) {
 192                 if (clients[i]->tabx > ev->x) {
 193                         switch (ev->button) {
 194                         case Button1:
 195                                 focus(i);
 196                                 break;
 197                         case Button2:
 198                                 focus(i);
 199                                 killclient(NULL);
 200                                 break;
 201                         case Button4: /* FALLTHROUGH */
 202                         case Button5:
 203                                 arg.i = ev->button == Button4 ? -1 : 1;
 204                                 rotate(&arg);
 205                                 break;
 206                         }
 207                         break;
 208                 }
 209         }
 210 }
 211
 212 void
 213 cleanup(void)
 214 {
 215         int i;
 216
 217         for (i = 0; i < nclients; i++) {
 218                 focus(i);
 219                 killclient(NULL);
 220                 XReparentWindow(dpy, clients[i]->win, root, 0, 0);
 221                 unmanage(i);
 222         }
 223         free(clients);
 224         clients = NULL;
 225
 226         XFreePixmap(dpy, dc.drawable);
 227         XFreeGC(dpy, dc.gc);
 228         XDestroyWindow(dpy, win);
 229         XSync(dpy, False);
 230         free(cmd);
 231 }
 232
 233 void
 234 clientmessage(const XEvent *e)
 235 {
 236         const XClientMessageEvent *ev = &e->xclient;
 237
 238         if (ev->message_type == wmatom[WMProtocols] &&
 239             ev->data.l[0] == wmatom[WMDelete]) {
 240                 if (nclients > 1 && killclientsfirst) {
 241                         killclient(0);
 242                         return;
 243                 }
 244                 running = False;
 245         }
 246 }
 247
 248 void
 249 configurenotify(const XEvent *e)
 250 {
 251         const XConfigureEvent *ev = &e->xconfigure;
 252
 253         if (ev->window == win && (ev->width != ww || ev->height != wh)) {
 254                 ww = ev->width;
 255                 wh = ev->height;
 256                 XFreePixmap(dpy, dc.drawable);
 257                 dc.drawable = XCreatePixmap(dpy, root, ww, wh,
 258                               DefaultDepth(dpy, screen));
 259
 260                 if (!obh && (wh <= bh)) {
 261                         obh = bh;
 262                         bh = 0;
 263                 } else if (!bh && (wh > obh)) {
 264                         bh = obh;
 265                         obh = 0;
 266                 }
 267
 268                 if (sel > -1)
 269                         resize(sel, ww, wh - bh);
 270                 XSync(dpy, False);
 271         }
 272 }
 273
 274 void
 275 configurerequest(const XEvent *e)
 276 {
 277         const XConfigureRequestEvent *ev = &e->xconfigurerequest;
 278         XWindowChanges wc;
 279         int c;
 280
 281         if ((c = getclient(ev->window)) > -1) {
 282                 wc.x = 0;
 283                 wc.y = bh;
 284                 wc.width = ww;
 285                 wc.height = wh - bh;
 286                 wc.border_width = 0;
 287                 wc.sibling = ev->above;
 288                 wc.stack_mode = ev->detail;
 289                 XConfigureWindow(dpy, clients[c]->win, ev->value_mask, &wc);
 290         }
 291 }
 292
 293 void
 294 createnotify(const XEvent *e)
 295 {
 296         const XCreateWindowEvent *ev = &e->xcreatewindow;
 297
 298         if (ev->window != win && getclient(ev->window) < 0)
 299                 manage(ev->window);
 300 }
 301
 302 void
 303 destroynotify(const XEvent *e)
 304 {
 305         const XDestroyWindowEvent *ev = &e->xdestroywindow;
 306         int c;
 307
 308         if ((c = getclient(ev->window)) > -1)
 309                 unmanage(c);
 310 }
 311
 312 void
 313 die(const char *errstr, ...)
 314 {
 315         va_list ap;
 316
 317         va_start(ap, errstr);
 318         vfprintf(stderr, errstr, ap);
 319         va_end(ap);
 320         exit(EXIT_FAILURE);
 321 }
 322
 323 void
 324 drawbar(void)
 325 {
 326         XftColor *col;
 327         int c, cc, fc, width;
 328         char *name = NULL;
 329
 330         if (nclients == 0) {
 331                 dc.x = 0;
 332                 dc.w = ww;
 333                 XFetchName(dpy, win, &name);
 334                 drawtext(name ? name : "", dc.norm);
 335                 XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, ww, bh, 0, 0);
 336                 XSync(dpy, False);
 337
 338                 return;
 339         }
 340
 341         width = ww;
 342         cc = ww / tabwidth;
 343         if (nclients > cc)
 344                 cc = (ww - TEXTW(before) - TEXTW(after)) / tabwidth;
 345
 346         if ((fc = getfirsttab()) + cc < nclients) {
 347                 dc.w = TEXTW(after);
 348                 dc.x = width - dc.w;
 349                 drawtext(after, dc.sel);
 350                 width -= dc.w;
 351         }
 352         dc.x = 0;
 353
 354         if (fc > 0) {
 355                 dc.w = TEXTW(before);
 356                 drawtext(before, dc.sel);
 357                 dc.x += dc.w;
 358                 width -= dc.w;
 359         }
 360
 361         cc = MIN(cc, nclients);
 362         for (c = fc; c < fc + cc; c++) {
 363                 dc.w = width / cc;
 364                 if (c == sel) {
 365                         col = dc.sel;
 366                         dc.w += width % cc;
 367                 } else {
 368                         col = clients[c]->urgent ? dc.urg : dc.norm;
 369                 }
 370                 drawtext(clients[c]->name, col);
 371                 dc.x += dc.w;
 372                 clients[c]->tabx = dc.x;
 373         }
 374         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, ww, bh, 0, 0);
 375         XSync(dpy, False);
 376 }
 377
 378 void
 379 drawtext(const char *text, XftColor col[ColLast])
 380 {
 381         int i, j, x, y, h, len, olen;
 382         char buf[256];
 383         XftDraw *d;
 384         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 385
 386         XSetForeground(dpy, dc.gc, col[ColBG].pixel);
 387         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 388         if (!text)
 389                 return;
 390
 391         olen = strlen(text);
 392         h = dc.font.ascent + dc.font.descent;
 393         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 394         x = dc.x + (h / 2);
 395
 396         /* shorten text if necessary */
 397         for (len = MIN(olen, sizeof(buf));
 398                 len && textnw(text, len) > dc.w - h; len--);
 399
 400         if (!len)
 401                 return;
 402
 403         memcpy(buf, text, len);
 404         if (len < olen) {
 405                 for (i = len, j = strlen(titletrim); j && i;
 406                      buf[--i] = titletrim[--j])
 407                         ;
 408         }
 409
 410         d = XftDrawCreate(dpy, dc.drawable, DefaultVisual(dpy, screen), DefaultColormap(dpy, screen));
 411         XftDrawStringUtf8(d, &col[ColFG], dc.font.xfont, x, y, (XftChar8 *) buf, len);
 412         XftDrawDestroy(d);
 413 }
 414
 415 void *
 416 ecalloc(size_t n, size_t size)
 417 {
 418         void *p;
 419
 420         if (!(p = calloc(n, size)))
 421                 die("%s: cannot calloc\n", argv0);
 422         return p;
 423 }
 424
 425 void *
 426 erealloc(void *o, size_t size)
 427 {
 428         void *p;
 429
 430         if (!(p = realloc(o, size)))
 431                 die("%s: cannot realloc\n", argv0);
 432         return p;
 433 }
 434
 435 void
 436 expose(const XEvent *e)
 437 {
 438         const XExposeEvent *ev = &e->xexpose;
 439
 440         if (ev->count == 0 && win == ev->window)
 441                 drawbar();
 442 }
 443
 444 void
 445 focus(int c)
 446 {
 447         char buf[BUFSIZ] = "tabbed-"VERSION" ::";
 448         size_t i, n;
 449         XWMHints* wmh;
 450
 451         /* If c, sel and clients are -1, raise tabbed-win itself */
 452         if (nclients == 0) {
 453                 cmd[cmd_append_pos] = NULL;
 454                 for(i = 0, n = strlen(buf); cmd[i] && n < sizeof(buf); i++)
 455                         n += snprintf(&buf[n], sizeof(buf) - n, " %s", cmd[i]);
 456
 457                 xsettitle(win, buf);
 458                 XRaiseWindow(dpy, win);
 459
 460                 return;
 461         }
 462
 463         if (c < 0 || c >= nclients)
 464                 return;
 465
 466         resize(c, ww, wh - bh);
 467         XRaiseWindow(dpy, clients[c]->win);
 468         XSetInputFocus(dpy, clients[c]->win, RevertToParent, CurrentTime);
 469         sendxembed(c, XEMBED_FOCUS_IN, XEMBED_FOCUS_CURRENT, 0, 0);
 470         sendxembed(c, XEMBED_WINDOW_ACTIVATE, 0, 0, 0);
 471         xsettitle(win, clients[c]->name);
 472
 473         if (sel != c) {
 474                 lastsel = sel;
 475                 sel = c;
 476         }
 477
 478         if (clients[c]->urgent && (wmh = XGetWMHints(dpy, clients[c]->win))) {
 479                 wmh->flags &= ~XUrgencyHint;
 480                 XSetWMHints(dpy, clients[c]->win, wmh);
 481                 clients[c]->urgent = False;
 482                 XFree(wmh);
 483         }
 484
 485         drawbar();
 486         XSync(dpy, False);
 487 }
 488
 489 void
 490 focusin(const XEvent *e)
 491 {
 492         const XFocusChangeEvent *ev = &e->xfocus;
 493         int dummy;
 494         Window focused;
 495
 496         if (ev->mode != NotifyUngrab) {
 497                 XGetInputFocus(dpy, &focused, &dummy);
 498                 if (focused == win)
 499                         focus(sel);
 500         }
 501 }
 502
 503 void
 504 focusonce(const Arg *arg)
 505 {
 506         nextfocus = True;
 507 }
 508
 509 void
 510 focusurgent(const Arg *arg)
 511 {
 512         int c;
 513
 514         if (sel < 0)
 515                 return;
 516
 517         for (c = (sel + 1) % nclients; c != sel; c = (c + 1) % nclients) {
 518                 if (clients[c]->urgent) {
 519                         focus(c);
 520                         return;
 521                 }
 522         }
 523 }
 524
 525 void
 526 fullscreen(const Arg *arg)
 527 {
 528         XEvent e;
 529
 530         e.type = ClientMessage;
 531         e.xclient.window = win;
 532         e.xclient.message_type = wmatom[WMState];
 533         e.xclient.format = 32;
 534         e.xclient.data.l[0] = 2;
 535         e.xclient.data.l[1] = wmatom[WMFullscreen];
 536         e.xclient.data.l[2] = 0;
 537         XSendEvent(dpy, root, False, SubstructureNotifyMask, &e);
 538 }
 539
 540 char *
 541 getatom(int a)
 542 {
 543         static char buf[BUFSIZ];
 544         Atom adummy;
 545         int idummy;
 546         unsigned long ldummy;
 547         unsigned char *p = NULL;
 548
 549         XGetWindowProperty(dpy, win, wmatom[a], 0L, BUFSIZ, False, XA_STRING,
 550                            &adummy, &idummy, &ldummy, &ldummy, &p);
 551         if (p)
 552                 strncpy(buf, (char *)p, LENGTH(buf)-1);
 553         else
 554                 buf[0] = '\0';
 555         XFree(p);
 556
 557         return buf;
 558 }
 559
 560 int
 561 getclient(Window w)
 562 {
 563         int i;
 564
 565         for (i = 0; i < nclients; i++) {
 566                 if (clients[i]->win == w)
 567                         return i;
 568         }
 569
 570         return -1;
 571 }
 572
 573 XftColor
 574 getcolor(const char *colstr)
 575 {
 576         XftColor color;
 577
 578         if (!XftColorAllocName(dpy, DefaultVisual(dpy, screen), DefaultColormap(dpy, screen), colstr, &color))
 579                 die("%s: cannot allocate color '%s'\n", argv0, colstr);
 580
 581         return color;
 582 }
 583
 584 int
 585 getfirsttab(void)
 586 {
 587         int cc, ret;
 588
 589         if (sel < 0)
 590                 return 0;
 591
 592         cc = ww / tabwidth;
 593         if (nclients > cc)
 594                 cc = (ww - TEXTW(before) - TEXTW(after)) / tabwidth;
 595
 596         ret = sel - cc / 2 + (cc + 1) % 2;
 597         return ret < 0 ? 0 :
 598                ret + cc > nclients ? MAX(0, nclients - cc) :
 599                ret;
 600 }
 601
 602 Bool
 603 gettextprop(Window w, Atom atom, char *text, unsigned int size)
 604 {
 605         char **list = NULL;
 606         int n;
 607         XTextProperty name;
 608
 609         if (!text || size == 0)
 610                 return False;
 611
 612         text[0] = '\0';
 613         XGetTextProperty(dpy, w, &name, atom);
 614         if (!name.nitems)
 615                 return False;
 616
 617         if (name.encoding == XA_STRING) {
 618                 strncpy(text, (char *)name.value, size - 1);
 619         } else if (XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
 620                    && n > 0 && *list) {
 621                 strncpy(text, *list, size - 1);
 622                 XFreeStringList(list);
 623         }
 624         text[size - 1] = '\0';
 625         XFree(name.value);
 626
 627         return True;
 628 }
 629
 630 void
 631 initfont(const char *fontstr)
 632 {
 633         if (!(dc.font.xfont = XftFontOpenName(dpy, screen, fontstr))
 634             && !(dc.font.xfont = XftFontOpenName(dpy, screen, "fixed")))
 635                 die("error, cannot load font: '%s'\n", fontstr);
 636
 637         dc.font.ascent = dc.font.xfont->ascent;
 638         dc.font.descent = dc.font.xfont->descent;
 639         dc.font.height = dc.font.ascent + dc.font.descent;
 640 }
 641
 642 Bool
 643 isprotodel(int c)
 644 {
 645         int i, n;
 646         Atom *protocols;
 647         Bool ret = False;
 648
 649         if (XGetWMProtocols(dpy, clients[c]->win, &protocols, &n)) {
 650                 for (i = 0; !ret && i < n; i++) {
 651                         if (protocols[i] == wmatom[WMDelete])
 652                                 ret = True;
 653                 }
 654                 XFree(protocols);
 655         }
 656
 657         return ret;
 658 }
 659
 660 void
 661 keypress(const XEvent *e)
 662 {
 663         const XKeyEvent *ev = &e->xkey;
 664         unsigned int i;
 665         KeySym keysym;
 666
 667         keysym = XkbKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0, 0);
 668         for (i = 0; i < LENGTH(keys); i++) {
 669                 if (keysym == keys[i].keysym &&
 670                     CLEANMASK(keys[i].mod) == CLEANMASK(ev->state) &&
 671                     keys[i].func)
 672                         keys[i].func(&(keys[i].arg));
 673         }
 674 }
 675
 676 void
 677 killclient(const Arg *arg)
 678 {
 679         XEvent ev;
 680
 681         if (sel < 0)
 682                 return;
 683
 684         if (isprotodel(sel) && !clients[sel]->closed) {
 685                 ev.type = ClientMessage;
 686                 ev.xclient.window = clients[sel]->win;
 687                 ev.xclient.message_type = wmatom[WMProtocols];
 688                 ev.xclient.format = 32;
 689                 ev.xclient.data.l[0] = wmatom[WMDelete];
 690                 ev.xclient.data.l[1] = CurrentTime;
 691                 XSendEvent(dpy, clients[sel]->win, False, NoEventMask, &ev);
 692                 clients[sel]->closed = True;
 693         } else {
 694                 XKillClient(dpy, clients[sel]->win);
 695         }
 696 }
 697
 698 void
 699 manage(Window w)
 700 {
 701         updatenumlockmask();
 702         {
 703                 int i, j, nextpos;
 704                 unsigned int modifiers[] = { 0, LockMask, numlockmask,
 705                                              numlockmask | LockMask };
 706                 KeyCode code;
 707                 Client *c;
 708                 XEvent e;
 709
 710                 XWithdrawWindow(dpy, w, 0);
 711                 XReparentWindow(dpy, w, win, 0, bh);
 712                 XSelectInput(dpy, w, PropertyChangeMask |
 713                              StructureNotifyMask | EnterWindowMask);
 714                 XSync(dpy, False);
 715
 716                 for (i = 0; i < LENGTH(keys); i++) {
 717                         if ((code = XKeysymToKeycode(dpy, keys[i].keysym))) {
 718                                 for (j = 0; j < LENGTH(modifiers); j++) {
 719                                         XGrabKey(dpy, code, keys[i].mod |
 720                                                  modifiers[j], w, True,
 721                                                  GrabModeAsync, GrabModeAsync);
 722                                 }
 723                         }
 724                 }
 725
 726                 c = ecalloc(1, sizeof *c);
 727                 c->win = w;
 728
 729                 nclients++;
 730                 clients = erealloc(clients, sizeof(Client *) * nclients);
 731
 732                 if(npisrelative) {
 733                         nextpos = sel + newposition;
 734                 } else {
 735                         if (newposition < 0)
 736                                 nextpos = nclients - newposition;
 737                         else
 738                                 nextpos = newposition;
 739                 }
 740                 if (nextpos >= nclients)
 741                         nextpos = nclients - 1;
 742                 if (nextpos < 0)
 743                         nextpos = 0;
 744
 745                 if (nclients > 1 && nextpos < nclients - 1)
 746                         memmove(&clients[nextpos + 1], &clients[nextpos],
 747                                 sizeof(Client *) * (nclients - nextpos - 1));
 748
 749                 clients[nextpos] = c;
 750                 updatetitle(nextpos);
 751
 752                 XLowerWindow(dpy, w);
 753                 XMapWindow(dpy, w);
 754
 755                 e.xclient.window = w;
 756                 e.xclient.type = ClientMessage;
 757                 e.xclient.message_type = wmatom[XEmbed];
 758                 e.xclient.format = 32;
 759                 e.xclient.data.l[0] = CurrentTime;
 760                 e.xclient.data.l[1] = XEMBED_EMBEDDED_NOTIFY;
 761                 e.xclient.data.l[2] = 0;
 762                 e.xclient.data.l[3] = win;
 763                 e.xclient.data.l[4] = 0;
 764                 XSendEvent(dpy, root, False, NoEventMask, &e);
 765
 766                 XSync(dpy, False);
 767
 768                 /* Adjust sel before focus does set it to lastsel. */
 769                 if (sel >= nextpos)
 770                         sel++;
 771                 focus(nextfocus ? nextpos :
 772                       sel < 0 ? 0 :
 773                       sel);
 774                 nextfocus = foreground;
 775         }
 776 }
 777
 778 void
 779 maprequest(const XEvent *e)
 780 {
 781         const XMapRequestEvent *ev = &e->xmaprequest;
 782
 783         if (getclient(ev->window) < 0)
 784                 manage(ev->window);
 785 }
 786
 787 void
 788 move(const Arg *arg)
 789 {
 790         if (arg->i >= 0 && arg->i < nclients)
 791                 focus(arg->i);
 792 }
 793
 794 void
 795 movetab(const Arg *arg)
 796 {
 797         int c;
 798         Client *new;
 799
 800         if (sel < 0)
 801                 return;
 802
 803         c = (sel + arg->i) % nclients;
 804         if (c < 0)
 805                 c += nclients;
 806
 807         if (c == sel)
 808                 return;
 809
 810         new = clients[sel];
 811         if (sel < c)
 812                 memmove(&clients[sel], &clients[sel+1],
 813                         sizeof(Client *) * (c - sel));
 814         else
 815                 memmove(&clients[c+1], &clients[c],
 816                         sizeof(Client *) * (sel - c));
 817         clients[c] = new;
 818         sel = c;
 819
 820         drawbar();
 821 }
 822
 823 void
 824 propertynotify(const XEvent *e)
 825 {
 826         const XPropertyEvent *ev = &e->xproperty;
 827         XWMHints *wmh;
 828         int c;
 829         char* selection = NULL;
 830         Arg arg;
 831
 832         if (ev->state == PropertyNewValue && ev->atom == wmatom[WMSelectTab]) {
 833                 selection = getatom(WMSelectTab);
 834                 if (!strncmp(selection, "0x", 2)) {
 835                         arg.i = getclient(strtoul(selection, NULL, 0));
 836                         move(&arg);
 837                 } else {
 838                         cmd[cmd_append_pos] = selection;
 839                         arg.v = cmd;
 840                         spawn(&arg);
 841                 }
 842         } else if (ev->state == PropertyNewValue && ev->atom == XA_WM_HINTS &&
 843                    (c = getclient(ev->window)) > -1 &&
 844                    (wmh = XGetWMHints(dpy, clients[c]->win))) {
 845                 if (wmh->flags & XUrgencyHint) {
 846                         XFree(wmh);
 847                         wmh = XGetWMHints(dpy, win);
 848                         if (c != sel) {
 849                                 if (urgentswitch && wmh &&
 850                                     !(wmh->flags & XUrgencyHint)) {
 851                                         /* only switch, if tabbed was focused
 852                                          * since last urgency hint if WMHints
 853                                          * could not be received,
 854                                          * default to no switch */
 855                                         focus(c);
 856                                 } else {
 857                                         /* if no switch should be performed,
 858                                          * mark tab as urgent */
 859                                         clients[c]->urgent = True;
 860                                         drawbar();
 861                                 }
 862                         }
 863                         if (wmh && !(wmh->flags & XUrgencyHint)) {
 864                                 /* update tabbed urgency hint
 865                                  * if not set already */
 866                                 wmh->flags |= XUrgencyHint;
 867                                 XSetWMHints(dpy, win, wmh);
 868                         }
 869                 }
 870                 XFree(wmh);
 871         } else if (ev->state != PropertyDelete && ev->atom == XA_WM_NAME &&
 872                    (c = getclient(ev->window)) > -1) {
 873                 updatetitle(c);
 874         }
 875 }
 876
 877 void
 878 resize(int c, int w, int h)
 879 {
 880         XConfigureEvent ce;
 881         XWindowChanges wc;
 882
 883         ce.x = 0;
 884         ce.y = wc.y = bh;
 885         ce.width = wc.width = w;
 886         ce.height = wc.height = h;
 887         ce.type = ConfigureNotify;
 888         ce.display = dpy;
 889         ce.event = clients[c]->win;
 890         ce.window = clients[c]->win;
 891         ce.above = None;
 892         ce.override_redirect = False;
 893         ce.border_width = 0;
 894
 895         XConfigureWindow(dpy, clients[c]->win, CWY | CWWidth | CWHeight, &wc);
 896         XSendEvent(dpy, clients[c]->win, False, StructureNotifyMask,
 897                    (XEvent *)&ce);
 898 }
 899
 900 void
 901 rotate(const Arg *arg)
 902 {
 903         int nsel = -1;
 904
 905         if (sel < 0)
 906                 return;
 907
 908         if (arg->i == 0) {
 909                 if (lastsel > -1)
 910                         focus(lastsel);
 911         } else if (sel > -1) {
 912                 /* Rotating in an arg->i step around the clients. */
 913                 nsel = sel + arg->i;
 914                 while (nsel >= nclients)
 915                         nsel -= nclients;
 916                 while (nsel < 0)
 917                         nsel += nclients;
 918                 focus(nsel);
 919         }
 920 }
 921
 922 void
 923 run(void)
 924 {
 925         XEvent ev;
 926
 927         /* main event loop */
 928         XSync(dpy, False);
 929         drawbar();
 930         if (doinitspawn == True)
 931                 spawn(NULL);
 932
 933         while (running) {
 934                 XNextEvent(dpy, &ev);
 935                 if (handler[ev.type])
 936                         (handler[ev.type])(&ev); /* call handler */
 937         }
 938 }
 939
 940 void
 941 sendxembed(int c, long msg, long detail, long d1, long d2)
 942 {
 943         XEvent e = { 0 };
 944
 945         e.xclient.window = clients[c]->win;
 946         e.xclient.type = ClientMessage;
 947         e.xclient.message_type = wmatom[XEmbed];
 948         e.xclient.format = 32;
 949         e.xclient.data.l[0] = CurrentTime;
 950         e.xclient.data.l[1] = msg;
 951         e.xclient.data.l[2] = detail;
 952         e.xclient.data.l[3] = d1;
 953         e.xclient.data.l[4] = d2;
 954         XSendEvent(dpy, clients[c]->win, False, NoEventMask, &e);
 955 }
 956
 957 void
 958 setcmd(int argc, char *argv[], int replace)
 959 {
 960         int i;
 961
 962         cmd = ecalloc(argc + 3, sizeof(*cmd));
 963         if (argc == 0)
 964                 return;
 965         for (i = 0; i < argc; i++)
 966                 cmd[i] = argv[i];
 967         cmd[replace > 0 ? replace : argc] = winid;
 968         cmd_append_pos = argc + !replace;
 969         cmd[cmd_append_pos] = cmd[cmd_append_pos + 1] = NULL;
 970 }
 971
 972 void
 973 setup(void)
 974 {
 975         int bitm, tx, ty, tw, th, dh, dw, isfixed;
 976         XWMHints *wmh;
 977         XClassHint class_hint;
 978         XSizeHints *size_hint;
 979         struct sigaction sa;
 980
 981         /* do not transform children into zombies when they terminate */
 982         sigemptyset(&sa.sa_mask);
 983         sa.sa_flags = SA_NOCLDSTOP | SA_NOCLDWAIT | SA_RESTART;
 984         sa.sa_handler = SIG_IGN;
 985         sigaction(SIGCHLD, &sa, NULL);
 986
 987         /* clean up any zombies that might have been inherited */
 988         while (waitpid(-1, NULL, WNOHANG) > 0);
 989
 990         /* init screen */
 991         screen = DefaultScreen(dpy);
 992         root = RootWindow(dpy, screen);
 993         initfont(font);
 994         bh = dc.h = dc.font.height + 2;
 995
 996         /* init atoms */
 997         wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 998         wmatom[WMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN",
 999                                            False);
1000         wmatom[WMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1001         wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1002         wmatom[WMSelectTab] = XInternAtom(dpy, "_TABBED_SELECT_TAB", False);
1003         wmatom[WMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
1004         wmatom[XEmbed] = XInternAtom(dpy, "_XEMBED", False);
1005
1006         /* init appearance */
1007         wx = 0;
1008         wy = 0;
1009         ww = 800;
1010         wh = 600;
1011         isfixed = 0;
1012
1013         if (geometry) {
1014                 tx = ty = tw = th = 0;
1015                 bitm = XParseGeometry(geometry, &tx, &ty, (unsigned *)&tw,
1016                                       (unsigned *)&th);
1017                 if (bitm & XValue)
1018                         wx = tx;
1019                 if (bitm & YValue)
1020                         wy = ty;
1021                 if (bitm & WidthValue)
1022                         ww = tw;
1023                 if (bitm & HeightValue)
1024                         wh = th;
1025                 if (bitm & XNegative && wx == 0)
1026                         wx = -1;
1027                 if (bitm & YNegative && wy == 0)
1028                         wy = -1;
1029                 if (bitm & (HeightValue | WidthValue))
1030                         isfixed = 1;
1031
1032                 dw = DisplayWidth(dpy, screen);
1033                 dh = DisplayHeight(dpy, screen);
1034                 if (wx < 0)
1035                         wx = dw + wx - ww - 1;
1036                 if (wy < 0)
1037                         wy = dh + wy - wh - 1;
1038         }
1039
1040         dc.norm[ColBG] = getcolor(normbgcolor);
1041         dc.norm[ColFG] = getcolor(normfgcolor);
1042         dc.sel[ColBG] = getcolor(selbgcolor);
1043         dc.sel[ColFG] = getcolor(selfgcolor);
1044         dc.urg[ColBG] = getcolor(urgbgcolor);
1045         dc.urg[ColFG] = getcolor(urgfgcolor);
1046         dc.drawable = XCreatePixmap(dpy, root, ww, wh,
1047                                     DefaultDepth(dpy, screen));
1048         dc.gc = XCreateGC(dpy, root, 0, 0);
1049
1050         win = XCreateSimpleWindow(dpy, root, wx, wy, ww, wh, 0,
1051                                   dc.norm[ColFG].pixel, dc.norm[ColBG].pixel);
1052         XMapRaised(dpy, win);
1053         XSelectInput(dpy, win, SubstructureNotifyMask | FocusChangeMask |
1054                      ButtonPressMask | ExposureMask | KeyPressMask |
1055                      PropertyChangeMask | StructureNotifyMask |
1056                      SubstructureRedirectMask);
1057         xerrorxlib = XSetErrorHandler(xerror);
1058
1059         class_hint.res_name = wmname;
1060         class_hint.res_class = "tabbed";
1061         XSetClassHint(dpy, win, &class_hint);
1062
1063         size_hint = XAllocSizeHints();
1064         if (!isfixed) {
1065                 size_hint->flags = PSize | PMinSize;
1066                 size_hint->height = wh;
1067                 size_hint->width = ww;
1068                 size_hint->min_height = bh + 1;
1069         } else {
1070                 size_hint->flags = PMaxSize | PMinSize;
1071                 size_hint->min_width = size_hint->max_width = ww;
1072                 size_hint->min_height = size_hint->max_height = wh;
1073         }
1074         wmh = XAllocWMHints();
1075         XSetWMProperties(dpy, win, NULL, NULL, NULL, 0, size_hint, wmh, NULL);
1076         XFree(size_hint);
1077         XFree(wmh);
1078
1079         XSetWMProtocols(dpy, win, &wmatom[WMDelete], 1);
1080
1081         snprintf(winid, sizeof(winid), "%lu", win);
1082         setenv("XEMBED", winid, 1);
1083
1084         nextfocus = foreground;
1085         focus(-1);
1086 }
1087
1088 void
1089 spawn(const Arg *arg)
1090 {
1091         struct sigaction sa;
1092
1093         if (fork() == 0) {
1094                 if(dpy)
1095                         close(ConnectionNumber(dpy));
1096
1097                 setsid();
1098
1099                 sigemptyset(&sa.sa_mask);
1100                 sa.sa_flags = 0;
1101                 sa.sa_handler = SIG_DFL;
1102                 sigaction(SIGCHLD, &sa, NULL);
1103
1104                 if (arg && arg->v) {
1105                         execvp(((char **)arg->v)[0], (char **)arg->v);
1106                         fprintf(stderr, "%s: execvp %s", argv0,
1107                                 ((char **)arg->v)[0]);
1108                 } else {
1109                         cmd[cmd_append_pos] = NULL;
1110                         execvp(cmd[0], cmd);
1111                         fprintf(stderr, "%s: execvp %s", argv0, cmd[0]);
1112                 }
1113                 perror(" failed");
1114                 exit(0);
1115         }
1116 }
1117
1118 int
1119 textnw(const char *text, unsigned int len)
1120 {
1121         XGlyphInfo ext;
1122         XftTextExtentsUtf8(dpy, dc.font.xfont, (XftChar8 *) text, len, &ext);
1123         return ext.xOff;
1124 }
1125
1126 void
1127 toggle(const Arg *arg)
1128 {
1129     *(Bool*) arg->v = !*(Bool*) arg->v;
1130 }
1131
1132 void
1133 unmanage(int c)
1134 {
1135         if (c < 0 || c >= nclients) {
1136                 drawbar();
1137                 XSync(dpy, False);
1138                 return;
1139         }
1140
1141         if (!nclients)
1142                 return;
1143
1144         if (c == 0) {
1145                 /* First client. */
1146                 nclients--;
1147                 free(clients[0]);
1148                 memmove(&clients[0], &clients[1], sizeof(Client *) * nclients);
1149         } else if (c == nclients - 1) {
1150                 /* Last client. */
1151                 nclients--;
1152                 free(clients[c]);
1153                 clients = erealloc(clients, sizeof(Client *) * nclients);
1154         } else {
1155                 /* Somewhere inbetween. */
1156                 free(clients[c]);
1157                 memmove(&clients[c], &clients[c+1],
1158                         sizeof(Client *) * (nclients - (c + 1)));
1159                 nclients--;
1160         }
1161
1162         if (nclients <= 0) {
1163                 lastsel = sel = -1;
1164
1165                 if (closelastclient)
1166                         running = False;
1167                 else if (fillagain && running)
1168                         spawn(NULL);
1169         } else {
1170                 if (lastsel >= nclients)
1171                         lastsel = nclients - 1;
1172                 else if (lastsel > c)
1173                         lastsel--;
1174
1175                 if (c == sel && lastsel >= 0) {
1176                         focus(lastsel);
1177                 } else {
1178                         if (sel > c)
1179                                 sel--;
1180                         if (sel >= nclients)
1181                                 sel = nclients - 1;
1182
1183                         focus(sel);
1184                 }
1185         }
1186
1187         drawbar();
1188         XSync(dpy, False);
1189 }
1190
1191 void
1192 unmapnotify(const XEvent *e)
1193 {
1194         const XUnmapEvent *ev = &e->xunmap;
1195         int c;
1196
1197         if ((c = getclient(ev->window)) > -1)
1198                 unmanage(c);
1199 }
1200
1201 void
1202 updatenumlockmask(void)
1203 {
1204         unsigned int i, j;
1205         XModifierKeymap *modmap;
1206
1207         numlockmask = 0;
1208         modmap = XGetModifierMapping(dpy);
1209         for (i = 0; i < 8; i++) {
1210                 for (j = 0; j < modmap->max_keypermod; j++) {
1211                         if (modmap->modifiermap[i * modmap->max_keypermod + j]
1212                             == XKeysymToKeycode(dpy, XK_Num_Lock))
1213                                 numlockmask = (1 << i);
1214                 }
1215         }
1216         XFreeModifiermap(modmap);
1217 }
1218
1219 void
1220 updatetitle(int c)
1221 {
1222         if (!gettextprop(clients[c]->win, wmatom[WMName], clients[c]->name,
1223             sizeof(clients[c]->name)))
1224                 gettextprop(clients[c]->win, XA_WM_NAME, clients[c]->name,
1225                             sizeof(clients[c]->name));
1226         if (sel == c)
1227                 xsettitle(win, clients[c]->name);
1228         drawbar();
1229 }
1230
1231 /* There's no way to check accesses to destroyed windows, thus those cases are
1232  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
1233  * default error handler, which may call exit.  */
1234 int
1235 xerror(Display *dpy, XErrorEvent *ee)
1236 {
1237         if (ee->error_code == BadWindow
1238             || (ee->request_code == X_SetInputFocus &&
1239                 ee->error_code == BadMatch)
1240             || (ee->request_code == X_PolyText8 &&
1241                 ee->error_code == BadDrawable)
1242             || (ee->request_code == X_PolyFillRectangle &&
1243                 ee->error_code == BadDrawable)
1244             || (ee->request_code == X_PolySegment &&
1245                 ee->error_code == BadDrawable)
1246             || (ee->request_code == X_ConfigureWindow &&
1247                 ee->error_code == BadMatch)
1248             || (ee->request_code == X_GrabButton &&
1249                 ee->error_code == BadAccess)
1250             || (ee->request_code == X_GrabKey &&
1251                 ee->error_code == BadAccess)
1252             || (ee->request_code == X_CopyArea &&
1253                 ee->error_code == BadDrawable))
1254                 return 0;
1255
1256         fprintf(stderr, "%s: fatal error: request code=%d, error code=%d\n",
1257                 argv0, ee->request_code, ee->error_code);
1258         return xerrorxlib(dpy, ee); /* may call exit */
1259 }
1260
1261 void
1262 xsettitle(Window w, const char *str)
1263 {
1264         XTextProperty xtp;
1265
1266         if (XmbTextListToTextProperty(dpy, (char **)&str, 1,
1267             XCompoundTextStyle, &xtp) == Success) {
1268                 XSetTextProperty(dpy, w, &xtp, wmatom[WMName]);
1269                 XSetTextProperty(dpy, w, &xtp, XA_WM_NAME);
1270                 XFree(xtp.value);
1271         }
1272 }
1273
1274 void
1275 usage(void)
1276 {
1277         die("usage: %s [-dfksv] [-g geometry] [-n name] [-p [s+/-]pos]\n"
1278             "       [-r narg] [-o color] [-O color] [-t color] [-T color]\n"
1279             "       [-u color] [-U color] command...\n", argv0);
1280 }
1281
1282 int
1283 main(int argc, char *argv[])
1284 {
1285         Bool detach = False;
1286         int replace = 0;
1287         char *pstr;
1288
1289         ARGBEGIN {
1290         case 'c':
1291                 closelastclient = True;
1292                 fillagain = False;
1293                 break;
1294         case 'd':
1295                 detach = True;
1296                 break;
1297         case 'f':
1298                 fillagain = True;
1299                 break;
1300         case 'g':
1301                 geometry = EARGF(usage());
1302                 break;
1303         case 'k':
1304                 killclientsfirst = True;
1305                 break;
1306         case 'n':
1307                 wmname = EARGF(usage());
1308                 break;
1309         case 'O':
1310                 normfgcolor = EARGF(usage());
1311                 break;
1312         case 'o':
1313                 normbgcolor = EARGF(usage());
1314                 break;
1315         case 'p':
1316                 pstr = EARGF(usage());
1317                 if (pstr[0] == 's') {
1318                         npisrelative = True;
1319                         newposition = atoi(&pstr[1]);
1320                 } else {
1321                         newposition = atoi(pstr);
1322                 }
1323                 break;
1324         case 'r':
1325                 replace = atoi(EARGF(usage()));
1326                 break;
1327         case 's':
1328                 doinitspawn = False;
1329                 break;
1330         case 'T':
1331                 selfgcolor = EARGF(usage());
1332                 break;
1333         case 't':
1334                 selbgcolor = EARGF(usage());
1335                 break;
1336         case 'U':
1337                 urgfgcolor = EARGF(usage());
1338                 break;
1339         case 'u':
1340                 urgbgcolor = EARGF(usage());
1341                 break;
1342         case 'v':
1343                 die("tabbed-"VERSION", © 2009-2016 tabbed engineers, "
1344                     "see LICENSE for details.\n");
1345                 break;
1346         default:
1347                 usage();
1348                 break;
1349         } ARGEND;
1350
1351         if (argc < 1) {
1352                 doinitspawn = False;
1353                 fillagain = False;
1354         }
1355
1356         setcmd(argc, argv, replace);
1357
1358         if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
1359                 fprintf(stderr, "%s: no locale support\n", argv0);
1360         if (!(dpy = XOpenDisplay(NULL)))
1361                 die("%s: cannot open display\n", argv0);
1362
1363         setup();
1364         printf("0x%lx\n", win);
1365         fflush(NULL);
1366
1367         if (detach) {
1368                 if (fork() == 0) {
1369                         fclose(stdout);
1370                 } else {
1371                         if (dpy)
1372                                 close(ConnectionNumber(dpy));
1373                         return EXIT_SUCCESS;
1374                 }
1375         }
1376
1377         run();
1378         cleanup();
1379         XCloseDisplay(dpy);
1380
1381         return EXIT_SUCCESS;
1382 }