Pileus Git - wmpus/blob - sys-x11.c

   1 /*
   2  * Copyright (c) 2011-2012, Andy Spencer <andy753421@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  */
  15
  16 #define _GNU_SOURCE
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <search.h>
  20
  21 #include <X11/Xlib.h>
  22 #include <X11/Xproto.h>
  23 #include <X11/Xatom.h>
  24 #include <X11/keysym.h>
  25 #include <X11/extensions/Xinerama.h>
  26
  27 #include "util.h"
  28 #include "conf.h"
  29 #include "sys.h"
  30 #include "wm.h"
  31
  32 /* Configuration */
  33 static int border     = 2;
  34 static int no_capture = 0;
  35
  36 /* Internal structures */
  37 struct win_sys {
  38         Window   xid;
  39         Display *dpy;
  40         struct {
  41                 int left, right, top, bottom;
  42         } strut;
  43 };
  44
  45 typedef struct {
  46         event_t ev;
  47         int     sym;
  48 } event_map_t;
  49
  50 typedef enum {
  51         WM_PROTO, WM_FOCUS, WM_DELETE,
  52         NET_STATE, NET_FULL, NET_STRUT,
  53         NET_TYPE, NET_DIALOG,
  54         NATOMS
  55 } atom_t;
  56
  57 typedef enum {
  58         CLR_FOCUS, CLR_UNFOCUS, CLR_URGENT, NCOLORS
  59 } color_t;
  60
  61 /* Global data */
  62 static int   running;
  63 static void *cache;
  64 static Atom atoms[NATOMS];
  65 static int (*xerrorxlib)(Display *, XErrorEvent *);
  66 static unsigned long colors[NCOLORS];
  67 static list_t *screens;
  68 static list_t *struts;
  69
  70 /* Conversion functions */
  71 static event_map_t ev2sym[] = {
  72         {EV_LEFT    , XK_Left },
  73         {EV_RIGHT   , XK_Right},
  74         {EV_UP      , XK_Up   },
  75         {EV_DOWN    , XK_Down },
  76         {EV_HOME    , XK_Home },
  77         {EV_END     , XK_End  },
  78         {EV_PAGEUP  , XK_Prior},
  79         {EV_PAGEDOWN, XK_Next },
  80         {EV_F1      , XK_F1   },
  81         {EV_F2      , XK_F2   },
  82         {EV_F3      , XK_F3   },
  83         {EV_F4      , XK_F4   },
  84         {EV_F5      , XK_F5   },
  85         {EV_F6      , XK_F6   },
  86         {EV_F7      , XK_F7   },
  87         {EV_F8      , XK_F8   },
  88         {EV_F9      , XK_F9   },
  89         {EV_F10     , XK_F10  },
  90         {EV_F11     , XK_F11  },
  91         {EV_F12     , XK_F12  },
  92 };
  93
  94 /* - Modifiers */
  95 static mod_t x2mod(unsigned int state, int up)
  96 {
  97         return (mod_t){
  98                .alt   = !!(state & Mod1Mask   ),
  99                .ctrl  = !!(state & ControlMask),
 100                .shift = !!(state & ShiftMask  ),
 101                .win   = !!(state & Mod4Mask   ),
 102                .up    = up,
 103         };
 104 }
 105
 106 static unsigned int mod2x(mod_t mod)
 107 {
 108         return (mod.alt   ? Mod1Mask    : 0)
 109              | (mod.ctrl  ? ControlMask : 0)
 110              | (mod.shift ? ShiftMask   : 0)
 111              | (mod.win   ? Mod4Mask    : 0);
 112 }
 113
 114 /* - Keycodes */
 115 static event_t xk2ev(KeySym sym)
 116 {
 117         event_map_t *em = map_getr(ev2sym,sym);
 118         return em ? em->ev : sym;
 119 }
 120
 121 static KeySym ev2xk(event_t ev)
 122 {
 123         event_map_t *em = map_get(ev2sym,ev);
 124         return em ? em->sym : ev;
 125 }
 126
 127 static event_t xb2ev(int btn)
 128 {
 129         return btn + EV_MOUSE0;
 130 }
 131
 132 static int ev2xb(event_t ev)
 133 {
 134         return ev - EV_MOUSE0;
 135 }
 136
 137 /* - Pointers */
 138 static ptr_t x2ptr(XEvent *xe)
 139 {
 140         XKeyEvent *xke = &xe->xkey;
 141         return (ptr_t){xke->x, xke->y, xke->x_root, xke->y_root};
 142 }
 143
 144 static Window getfocus(win_t *root, XEvent *xe)
 145 {
 146         int revert;
 147         Window focus = PointerRoot;
 148         if (xe->type == KeyPress || xe->type == KeyRelease)
 149                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 150         if (focus == PointerRoot)
 151                 focus = xe->xkey.subwindow;
 152         if (focus == None)
 153                 focus = xe->xkey.window;
 154         return focus;
 155 }
 156
 157 /* Strut functions
 158  *   Struts are spaces at the edges of the screen that are used by
 159  *   toolbars and statusbars such as dzen. */
 160 static int strut_copy(win_t *to, win_t *from, int scale)
 161 {
 162         int left   = from->sys->strut.left;
 163         int right  = from->sys->strut.right;
 164         int top    = from->sys->strut.top;
 165         int bottom = from->sys->strut.bottom;
 166         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 167                 return 0;
 168         to->x += scale*(left      );
 169         to->y += scale*(top       );
 170         to->w -= scale*(left+right);
 171         to->h -= scale*(top+bottom);
 172         to->sys->strut.left   += scale*left;
 173         to->sys->strut.right  += scale*right;
 174         to->sys->strut.top    += scale*top;
 175         to->sys->strut.bottom += scale*bottom;
 176         return 1;
 177 }
 178
 179 static int strut_add(win_t *root, win_t *win)
 180 {
 181         /* Get X11 strut data */
 182         Atom ret_type;
 183         int ret_size;
 184         unsigned long ret_items, bytes_left;
 185         unsigned char *xdata;
 186         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 187                         atoms[NET_STRUT], 0L, 4L, False, XA_CARDINAL,
 188                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 189         if (status != Success || ret_size != 32 || ret_items != 4)
 190                 return 0;
 191
 192         win->sys->strut.left   = ((long*)xdata)[0];
 193         win->sys->strut.right  = ((long*)xdata)[1];
 194         win->sys->strut.top    = ((long*)xdata)[2];
 195         win->sys->strut.bottom = ((long*)xdata)[3];
 196         struts = list_insert(struts, win);
 197         for (list_t *cur = screens; cur; cur = cur->next)
 198                 strut_copy(cur->data, win, 1);
 199         return strut_copy(root, win, 1);
 200 }
 201
 202 static int strut_del(win_t *root, win_t *win)
 203 {
 204         list_t *lwin = list_find(struts, win);
 205         if (lwin)
 206                 struts = list_remove(struts, lwin, 0);
 207         for (list_t *cur = screens; cur; cur = cur->next)
 208                 strut_copy(cur->data, win, -1);
 209         return strut_copy(root, win, -1);
 210 }
 211
 212 /* Window functions */
 213 static Atom win_prop(win_t *win, atom_t prop);
 214 static win_t *win_find(Display *dpy, Window xid, int create);
 215
 216 static win_t *win_new(Display *dpy, Window xid)
 217 {
 218         Window trans;
 219         XWindowAttributes attr;
 220         if (XGetWindowAttributes(dpy, xid, &attr))
 221                 if (attr.override_redirect)
 222                         return NULL;
 223         win_t *win    = new0(win_t);
 224         win->x        = attr.x;
 225         win->y        = attr.y;
 226         win->w        = attr.width;
 227         win->h        = attr.height;
 228         win->sys      = new0(win_sys_t);
 229         win->sys->dpy = dpy;
 230         win->sys->xid = xid;
 231         if (win_prop(win, NET_TYPE) == atoms[NET_DIALOG])
 232                 win->type = TYPE_DIALOG;
 233         if (XGetTransientForHint(dpy, xid, &trans))
 234                 win->parent = win_find(dpy, trans, 0);
 235         printf("win_new: %p = %p, %d (%d,%d %dx%d) - %s\n",
 236                         win, dpy, (int)xid,
 237                         win->x, win->y, win->w, win->h,
 238                         win->type ? "dialog" : "normal");
 239         return win;
 240 }
 241
 242 static int win_cmp(const void *_a, const void *_b)
 243 {
 244         const win_t *a = _a, *b = _b;
 245         if (a->sys->dpy < b->sys->dpy) return -1;
 246         if (a->sys->dpy > b->sys->dpy) return  1;
 247         if (a->sys->xid < b->sys->xid) return -1;
 248         if (a->sys->xid > b->sys->xid) return  1;
 249         return 0;
 250 }
 251
 252 static win_t *win_find(Display *dpy, Window xid, int create)
 253 {
 254         if (!dpy || !xid)
 255                 return NULL;
 256         //printf("win_find: %p, %d\n", dpy, (int)xid);
 257         win_sys_t sys = {.dpy=dpy, .xid=xid};
 258         win_t     tmp = {.sys=&sys};
 259         win_t **old = NULL, *new = NULL;
 260         if ((old = tfind(&tmp, &cache, win_cmp)))
 261                 return *old;
 262         if (create && (new = win_new(dpy,xid)))
 263                 tsearch(new, &cache, win_cmp);
 264         return new;
 265 }
 266
 267 static void win_free(win_t *win)
 268 {
 269         free(win->sys);
 270         free(win);
 271 }
 272
 273 static void win_remove(win_t *win)
 274 {
 275         tdelete(win, &cache, win_cmp);
 276         win_free(win);
 277 }
 278
 279 static int win_viewable(win_t *win)
 280 {
 281         XWindowAttributes attr;
 282         if (XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr))
 283                 return attr.map_state == IsViewable;
 284         else
 285                 return True;
 286 }
 287
 288 static int win_msg(win_t *win, atom_t msg)
 289 {
 290         int n, found = 0;
 291         Atom *protos;
 292         if (!XGetWMProtocols(win->sys->dpy, win->sys->xid, &protos, &n))
 293                 return 0;
 294
 295         while (!found && n--)
 296                 found = protos[n] == atoms[msg];
 297         XFree(protos);
 298         if (!found)
 299                 return 0;
 300
 301         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 302                 .type                 = ClientMessage,
 303                 .xclient.window       = win->sys->xid,
 304                 .xclient.message_type = atoms[WM_PROTO],
 305                 .xclient.format       = 32,
 306                 .xclient.data.l[0]    = atoms[msg],
 307                 .xclient.data.l[1]    = CurrentTime,
 308         });
 309         return 1;
 310 }
 311
 312 static Atom win_prop(win_t *win, atom_t prop)
 313 {
 314         int format;
 315         unsigned long nitems, bytes;
 316         unsigned char *buf = NULL;
 317         Atom atom, type = XA_ATOM;
 318         if (XGetWindowProperty(win->sys->dpy, win->sys->xid, atoms[prop],
 319                         0L, sizeof(Atom), False, type, &type, &format, &nitems, &bytes, &buf) || !buf)
 320                 return 0;
 321         atom = *(Atom *)buf;
 322         XFree(buf);
 323         return atom;
 324 }
 325
 326 /* Drawing functions */
 327 static unsigned long get_color(Display *dpy, const char *name)
 328 {
 329         XColor color;
 330         int screen = DefaultScreen(dpy);
 331         Colormap cmap = DefaultColormap(dpy, screen);
 332         XAllocNamedColor(dpy, cmap, name, &color, &color);
 333         return color.pixel;
 334 }
 335
 336 /* Callbacks */
 337 static void process_event(int type, XEvent *xe, win_t *root)
 338 {
 339         Display  *dpy = root->sys->dpy;
 340         win_t *win = NULL;
 341         //printf("event: %d\n", type);
 342
 343         /* Common data for all these events ... */
 344         ptr_t ptr = {}; mod_t mod = {};
 345         if (type == KeyPress    || type == KeyRelease    ||
 346             type == ButtonPress || type == ButtonRelease ||
 347             type == MotionNotify) {
 348                 Window xid = getfocus(root, xe);
 349                 if (!(win = win_find(dpy,xid,0)))
 350                         return;
 351                 //printf("button-press %p\n", win);
 352                 ptr = x2ptr(xe);
 353                 mod = x2mod(xe->xkey.state, type==KeyRelease||type==ButtonRelease);
 354         }
 355
 356         /* Split based on event */
 357         if (type == KeyPress) {
 358                 while (XCheckTypedEvent(dpy, KeyPress, xe));
 359                 KeySym sym = XLookupKeysym(&xe->xkey, 0);
 360                 printf("got xe %c %hhx\n", xk2ev(sym), mod2int(mod));
 361                 wm_handle_event(win, xk2ev(sym), mod, ptr);
 362         }
 363         else if (type == KeyRelease) {
 364                 //printf("release: %lx\n", xe->xkey.window);
 365         }
 366         else if (type == ButtonPress) {
 367                 if (wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr)) {
 368                         //printf("grab pointer\n");
 369                         XGrabPointer(dpy, xe->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 370                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 371                 } else {
 372                         //printf("allow events\n");
 373                         XAllowEvents(win->sys->dpy, ReplayPointer, xe->xbutton.time);
 374                 }
 375         }
 376         else if (type == ButtonRelease) {
 377                 XUngrabPointer(dpy, CurrentTime);
 378                 wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr);
 379         }
 380         else if (type == MotionNotify) {
 381                 while (XCheckTypedEvent(dpy, MotionNotify, xe));
 382                 wm_handle_ptr(win, ptr);
 383         }
 384         else if (type == EnterNotify || type == LeaveNotify) {
 385                 printf("%s: %lx\n", type==EnterNotify?"enter":"leave",
 386                                 xe->xcrossing.window);
 387                 event_t ev = type == EnterNotify ? EV_ENTER : EV_LEAVE;
 388                 if ((win = win_find(dpy,xe->xcrossing.window,0)))
 389                         wm_handle_event(win, ev, MOD(), PTR());
 390         }
 391         else if (type == FocusIn || type == FocusOut) {
 392                 //printf("focus: %lx\n", xe->xfocus.window);
 393                 event_t ev = FocusIn ? EV_FOCUS : EV_UNFOCUS;
 394                 if ((win = win_find(dpy,xe->xfocus.window,0)))
 395                         wm_handle_event(win, ev, MOD(), PTR());
 396         }
 397         else if (type == ConfigureNotify) {
 398                 printf("configure: %lx\n", xe->xconfigure.window);
 399         }
 400         else if (type == MapNotify) {
 401                 printf("map: %lx\n", xe->xmap.window);
 402         }
 403         else if (type == UnmapNotify) {
 404                 if ((win = win_find(dpy,xe->xunmap.window,0)) &&
 405                      win->state != ST_HIDE) {
 406                         if (!strut_del(root, win))
 407                                 wm_remove(win);
 408                         else
 409                                 wm_update();
 410                         win->state = ST_HIDE;
 411                 }
 412         }
 413         else if (type == DestroyNotify) {
 414                 //printf("destroy: %lx\n", xe->xdestroywindow.window);
 415                 if ((win = win_find(dpy,xe->xdestroywindow.window,0)))
 416                         win_remove(win);
 417         }
 418         else if (type == ConfigureRequest) {
 419                 XConfigureRequestEvent *cre = &xe->xconfigurerequest;
 420                 printf("configure_req: %lx - (0x%lx) %dx%d @ %d,%d\n",
 421                                 cre->window, cre->value_mask,
 422                                 cre->height, cre->width, cre->x, cre->y);
 423                 if ((win = win_find(dpy,xe->xconfigurerequest.window,1))) {
 424                         XSendEvent(dpy, cre->window, False, StructureNotifyMask, &(XEvent){
 425                                 .xconfigure.type              = ConfigureNotify,
 426                                 .xconfigure.display           = win->sys->dpy,
 427                                 .xconfigure.event             = win->sys->xid,
 428                                 .xconfigure.window            = win->sys->xid,
 429                                 .xconfigure.x                 = win->x,
 430                                 .xconfigure.y                 = win->y,
 431                                 .xconfigure.width             = win->w,
 432                                 .xconfigure.height            = win->h,
 433                                 .xconfigure.border_width      = border,
 434                         });
 435                         XSync(win->sys->dpy, False);
 436                 }
 437         }
 438         else if (type == MapRequest) {
 439                 printf("map_req: %lx\n", xe->xmaprequest.window);
 440                 if ((win = win_find(dpy,xe->xmaprequest.window,1)) &&
 441                      win->state == ST_HIDE) {
 442                         win->state = ST_SHOW;
 443                         if (win_prop(win, NET_STATE) == atoms[NET_FULL])
 444                                 win->state = ST_FULL;
 445                         XSelectInput(win->sys->dpy, win->sys->xid, PropertyChangeMask);
 446                         if (!strut_add(root, win))
 447                                 wm_insert(win);
 448                         else
 449                                 wm_update();
 450                 }
 451                 sys_show(win, win->state);
 452         }
 453         else if (type == ClientMessage) {
 454                 XClientMessageEvent *cme = &xe->xclient;
 455                 printf("client_msg: %lx - %ld %ld,%ld,%ld,%ld,%ld\n",
 456                                 cme->window, cme->message_type,
 457                                 cme->data.l[0], cme->data.l[1], cme->data.l[2],
 458                                 cme->data.l[3], cme->data.l[4]);
 459                 if ((win = win_find(dpy,cme->window,0))     &&
 460                     (cme->message_type == atoms[NET_STATE]) &&
 461                     (cme->data.l[1] == atoms[NET_FULL] ||
 462                      cme->data.l[2] == atoms[NET_FULL])) {
 463                         state_t next = (cme->data.l[0] == 1 || /* _NET_WM_STATE_ADD    */
 464                                        (cme->data.l[0] == 2 && /* _NET_WM_STATE_TOGGLE */
 465                                         win->state != ST_FULL)) ? ST_FULL : ST_SHOW;
 466                         wm_handle_state(win, win->state, next);
 467                         sys_show(win, next);
 468                 }
 469         }
 470         else if (type == PropertyNotify) {
 471                 printf("prop: %d\n", xe->xproperty.state);
 472         }
 473         else {
 474                 printf("unknown event: %d\n", type);
 475         }
 476 }
 477
 478 static int xerror(Display *dpy, XErrorEvent *err)
 479 {
 480         if (err->error_code == BadWindow ||
 481             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 482             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 483             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 484             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 485             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 486             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 487             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 488             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 489                 return 0;
 490         if (err->request_code == X_ChangeWindowAttributes && err->error_code == BadAccess)
 491                 error("Another window manager is already running");
 492         return xerrorxlib(dpy, err);
 493 }
 494
 495 static int xnoerror(Display *dpy, XErrorEvent *err)
 496 {
 497         return 0;
 498 }
 499
 500
 501 /********************
 502  * System functions *
 503  ********************/
 504 void sys_move(win_t *win, int x, int y, int w, int h)
 505 {
 506         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 507         int b = 2*border;
 508         win->x = x; win->y = y;
 509         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 510         w      = MAX(w-b,1); h      = MAX(h-b,1);
 511         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 512
 513         /* Flush events, so moving window doesn't cause re-focus
 514          * There's probably a better way to do this */
 515         XEvent xe;
 516         XSync(win->sys->dpy, False);
 517         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &xe))
 518                 printf("Skipping enter/leave event\n");
 519 }
 520
 521 void sys_raise(win_t *win)
 522 {
 523         //printf("sys_raise: %p\n", win);
 524         XRaiseWindow(win->sys->dpy, win->sys->xid);
 525         for (list_t *cur = struts; cur; cur = cur->next)
 526                 XRaiseWindow(((win_t*)cur->data)->sys->dpy,
 527                              ((win_t*)cur->data)->sys->xid);
 528 }
 529
 530 void sys_focus(win_t *win)
 531 {
 532         printf("sys_focus: %p\n", win);
 533
 534         /* Set actual focus */
 535         XSetInputFocus(win->sys->dpy, win->sys->xid,
 536                         RevertToPointerRoot, CurrentTime);
 537         win_msg(win, WM_FOCUS);
 538
 539         /* Set border on focused window */
 540         static win_t *last = NULL;
 541         if (last)
 542                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[CLR_UNFOCUS]);
 543         XSync(win->sys->dpy, False);
 544         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[CLR_FOCUS]);
 545         last = win;
 546 }
 547
 548 void sys_show(win_t *win, state_t state)
 549 {
 550         switch (state) {
 551         case ST_HIDE:
 552                 printf("sys_show: hide %p\n", win);
 553                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 554                 break;
 555         case ST_SHOW:
 556                 printf("sys_show: show %p\n", win);
 557                 if (win->state == ST_FULL)
 558                         sys_move(win, win->x, win->y, win->w, win->h);
 559                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, border);
 560                 XMapWindow(win->sys->dpy, win->sys->xid);
 561                 XSync(win->sys->dpy, False);
 562                 break;
 563         case ST_MAX:
 564                 printf("sys_show: max %p\n", win);
 565                 XMapWindow(win->sys->dpy, win->sys->xid);
 566                 break;
 567         case ST_FULL:
 568                 printf("sys_show: full %p\n", win);
 569                 win_t *screen = NULL;
 570                 for (list_t *cur = screens; cur; cur = cur->next) {
 571                         screen = cur->data;
 572                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 573                             win->y >= screen->y && win->y <= screen->y+screen->h)
 574                                 break;
 575                 }
 576                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, 0);
 577                 XMapWindow(win->sys->dpy, win->sys->xid);
 578                 XMoveResizeWindow(win->sys->dpy, win->sys->xid,
 579                         screen->x - screen->sys->strut.left,
 580                         screen->y - screen->sys->strut.top,
 581                         screen->w + screen->sys->strut.left + screen->sys->strut.right,
 582                         screen->h + screen->sys->strut.top  + screen->sys->strut.bottom);
 583                 XRaiseWindow(win->sys->dpy, win->sys->xid);
 584                 break;
 585         case ST_SHADE:
 586                 printf("sys_show: shade %p\n", win);
 587                 XMapWindow(win->sys->dpy, win->sys->xid);
 588                 break;
 589         case ST_ICON:
 590                 printf("sys_show: icon %p\n", win);
 591                 break;
 592         case ST_CLOSE:
 593                 printf("sys_show: close %p\n", win);
 594                 if (!win_msg(win, WM_DELETE)) {
 595                         XGrabServer(win->sys->dpy);
 596                         XSetErrorHandler(xnoerror);
 597                         XSetCloseDownMode(win->sys->dpy, DestroyAll);
 598                         XKillClient(win->sys->dpy, win->sys->xid);
 599                         XSync(win->sys->dpy, False);
 600                         XSetErrorHandler(xerror);
 601                         XUngrabServer(win->sys->dpy);
 602                 }
 603                 XDestroyWindow(win->sys->dpy, win->sys->xid);
 604                 break;
 605         }
 606         win->state = state;
 607 }
 608
 609 void sys_watch(win_t *win, event_t ev, mod_t mod)
 610 {
 611         //printf("sys_watch: %p - %x %hhx\n", win, ev, mod);
 612         XWindowAttributes attr;
 613         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 614         long mask = attr.your_event_mask;
 615         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 616                 XGrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid, False,
 617                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 618                                 GrabModeSync, GrabModeAsync, None, None);
 619         else if (ev == EV_ENTER)
 620                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 621         else if (ev == EV_LEAVE)
 622                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 623         else if (ev == EV_FOCUS || ev == EV_UNFOCUS)
 624                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 625         else
 626                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, ev2xk(ev)),
 627                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 628 }
 629
 630 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 631 {
 632         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 633                 XUngrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid);
 634 }
 635
 636 list_t *sys_info(win_t *win)
 637 {
 638         /* Use global copy of screens so we can add struts */
 639         if (screens == NULL) {
 640                 /* Add Xinerama screens */
 641                 int n = 0;
 642                 XineramaScreenInfo *info = NULL;
 643                 if (XineramaIsActive(win->sys->dpy))
 644                         info = XineramaQueryScreens(win->sys->dpy, &n);
 645                 for (int i = 0; i < n; i++) {
 646                         win_t *screen = new0(win_t);
 647                         screen->x = info[i].x_org;
 648                         screen->y = info[i].y_org;
 649                         screen->w = info[i].width;
 650                         screen->h = info[i].height;
 651                         screen->sys = new0(win_sys_t);
 652                         screens = list_append(screens, screen);
 653                 }
 654         }
 655         if (screens == NULL) {
 656                 /* No xinerama support */
 657                 win_t *screen = new0(win_t);
 658                 *screen = *win;
 659                 screens = list_insert(NULL, screen);
 660         }
 661         return screens;
 662 }
 663
 664 win_t *sys_init(void)
 665 {
 666         Display *dpy;
 667         Window   xid;
 668
 669         /* Load configuration */
 670         border     = conf_get_int("main.border",     border);
 671         no_capture = conf_get_int("main.no-capture", no_capture);
 672
 673         /* Open the display */
 674         if (!(dpy = XOpenDisplay(NULL)))
 675                 error("Unable to get display");
 676         if (!(xid = DefaultRootWindow(dpy)))
 677                 error("Unable to get root window");
 678
 679         /* Setup X11 data */
 680         atoms[WM_PROTO]    = XInternAtom(dpy, "WM_PROTOCOLS",               False);
 681         atoms[WM_FOCUS]    = XInternAtom(dpy, "WM_TAKE_FOCUS",              False);
 682         atoms[WM_DELETE]   = XInternAtom(dpy, "WM_DELETE_WINDOW",           False);
 683         atoms[NET_STATE]   = XInternAtom(dpy, "_NET_WM_STATE",              False);
 684         atoms[NET_FULL]    = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN",   False);
 685         atoms[NET_STRUT]   = XInternAtom(dpy, "_NET_WM_STRUT",              False);
 686         atoms[NET_TYPE]    = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE",        False);
 687         atoms[NET_DIALOG]  = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 688
 689         colors[CLR_FOCUS]   = get_color(dpy, "#a0a0ff");
 690         colors[CLR_UNFOCUS] = get_color(dpy, "#101066");
 691         colors[CLR_URGENT]  = get_color(dpy, "#ff0000");
 692         //printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 693
 694         /* Select window management events */
 695         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 696         xerrorxlib = XSetErrorHandler(xerror);
 697
 698         return win_find(dpy, xid, 1);
 699 }
 700
 701 void sys_run(win_t *root)
 702 {
 703         /* Add each initial window */
 704         if (!no_capture) {
 705                 unsigned int nkids;
 706                 Window par, xid, *kids = NULL;
 707                 if (XQueryTree(root->sys->dpy, root->sys->xid,
 708                                         &par, &xid, &kids, &nkids)) {
 709                         for(int i = 0; i < nkids; i++) {
 710                                 win_t *win = win_find(root->sys->dpy, kids[i], 1);
 711                                 if (win && win_viewable(win) && !strut_add(root,win))
 712                                         wm_insert(win);
 713                         }
 714                         XFree(kids);
 715                 }
 716                 wm_update(); // For struts
 717         }
 718
 719         /* Main loop */
 720         running = 1;
 721         while (running)
 722         {
 723                 XEvent xe;
 724                 XNextEvent(root->sys->dpy, &xe);
 725                 process_event(xe.type, &xe, root);
 726         }
 727 }
 728
 729 void sys_exit(void)
 730 {
 731         running = 0;
 732 }
 733
 734 void sys_free(win_t *root)
 735 {
 736         XCloseDisplay(root->sys->dpy);
 737         while (screens) {
 738                 win_free(screens->data);
 739                 screens = list_remove(screens, screens, 0);
 740         }
 741         tdestroy(cache, (void(*)(void*))win_free);
 742 }