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         state_t  state;
  44 };
  45
  46 typedef struct {
  47         event_t ev;
  48         int     sym;
  49 } event_map_t;
  50
  51 typedef enum {
  52         WM_PROTO, WM_FOCUS,
  53         NET_STATE, NET_FULL, NET_STRUT,
  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   = ((int*)xdata)[0];
 193         win->sys->strut.right  = ((int*)xdata)[1];
 194         win->sys->strut.top    = ((int*)xdata)[2];
 195         win->sys->strut.bottom = ((int*)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 win_t *win_new(Display *dpy, Window xid)
 214 {
 215         XWindowAttributes attr;
 216         if (XGetWindowAttributes(dpy, xid, &attr))
 217                 if (attr.override_redirect)
 218                         return NULL;
 219         win_t *win    = new0(win_t);
 220         win->x        = attr.x;
 221         win->y        = attr.y;
 222         win->w        = attr.width;
 223         win->h        = attr.height;
 224         win->sys      = new0(win_sys_t);
 225         win->sys->dpy = dpy;
 226         win->sys->xid = xid;
 227         printf("win_new: %p = %p, %d (%d,%d %dx%d)\n",
 228                         win, dpy, (int)xid,
 229                         win->x, win->y, win->w, win->h);
 230         return win;
 231 }
 232
 233 static int win_cmp(const void *_a, const void *_b)
 234 {
 235         const win_t *a = _a, *b = _b;
 236         if (a->sys->dpy < b->sys->dpy) return -1;
 237         if (a->sys->dpy > b->sys->dpy) return  1;
 238         if (a->sys->xid < b->sys->xid) return -1;
 239         if (a->sys->xid > b->sys->xid) return  1;
 240         return 0;
 241 }
 242
 243 static win_t *win_find(Display *dpy, Window xid, int create)
 244 {
 245         if (!dpy || !xid)
 246                 return NULL;
 247         //printf("win_find: %p, %d\n", dpy, (int)xid);
 248         win_sys_t sys = {.dpy=dpy, .xid=xid};
 249         win_t     tmp = {.sys=&sys};
 250         win_t **old = NULL, *new = NULL;
 251         if ((old = tfind(&tmp, &cache, win_cmp)))
 252                 return *old;
 253         if (create && (new = win_new(dpy,xid)))
 254                 tsearch(new, &cache, win_cmp);
 255         return new;
 256 }
 257
 258 static void win_free(win_t *win)
 259 {
 260         free(win->sys);
 261         free(win);
 262 }
 263
 264 static void win_remove(win_t *win)
 265 {
 266         tdelete(win, &cache, win_cmp);
 267         win_free(win);
 268 }
 269
 270 static int win_viewable(win_t *win)
 271 {
 272         XWindowAttributes attr;
 273         if (XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr))
 274                 return attr.map_state == IsViewable;
 275         else
 276                 return True;
 277 }
 278
 279 static int win_msg(win_t *win, atom_t msg)
 280 {
 281         int n, found = 0;
 282         Atom *protos;
 283         if (!XGetWMProtocols(win->sys->dpy, win->sys->xid, &protos, &n))
 284                 return 0;
 285
 286         while (!found && n--)
 287                 found = protos[n] == atoms[msg];
 288         XFree(protos);
 289         if (!found)
 290                 return 0;
 291
 292         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 293                 .type                 = ClientMessage,
 294                 .xclient.window       = win->sys->xid,
 295                 .xclient.message_type = atoms[WM_PROTO],
 296                 .xclient.format       = 32,
 297                 .xclient.data.l[0]    = atoms[msg],
 298                 .xclient.data.l[1]    = CurrentTime,
 299         });
 300         return 1;
 301 }
 302
 303 #if 0
 304 static int win_full(win_t *win)
 305 {
 306         Atom ret_type;
 307         int ret_size;
 308         unsigned long ret_items, bytes_left;
 309         unsigned char *xdata;
 310         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 311                         atoms[NET_FULL], 0L, 1L, False, XA_ATOM,
 312                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 313         printf("is_fullscreen:\n");
 314         printf("\t%d\n", status);
 315         printf("\t%d\n", ret_size);
 316         printf("\t%ld\n", ret_items);
 317         printf("\t%p\n", xdata);
 318         if (xdata)
 319         printf("\t%d\n", xdata[0]);
 320         return status == Success && ret_size == 32 && ret_items == 1 &&
 321                 xdata[0] == atoms[NET_FULL];
 322 }
 323 #endif
 324
 325 /* Drawing functions */
 326 static unsigned long get_color(Display *dpy, const char *name)
 327 {
 328         XColor color;
 329         int screen = DefaultScreen(dpy);
 330         Colormap cmap = DefaultColormap(dpy, screen);
 331         XAllocNamedColor(dpy, cmap, name, &color, &color);
 332         return color.pixel;
 333 }
 334
 335 /* Callbacks */
 336 static void process_event(int type, XEvent *xe, win_t *root)
 337 {
 338         Display  *dpy = root->sys->dpy;
 339         win_t *win = NULL;
 340         //printf("event: %d\n", type);
 341
 342         /* Common data for all these events ... */
 343         ptr_t ptr = {}; mod_t mod = {};
 344         if (type == KeyPress    || type == KeyRelease    ||
 345             type == ButtonPress || type == ButtonRelease ||
 346             type == MotionNotify) {
 347                 Window xid = getfocus(root, xe);
 348                 if (!(win = win_find(dpy,xid,0)))
 349                         return;
 350                 ptr = x2ptr(xe);
 351                 mod = x2mod(xe->xkey.state, type==KeyRelease||type==ButtonRelease);
 352         }
 353
 354         /* Split based on event */
 355         if (type == KeyPress) {
 356                 while (XCheckTypedEvent(dpy, KeyPress, xe));
 357                 KeySym sym = XKeycodeToKeysym(dpy, xe->xkey.keycode, 0);
 358                 printf("got xe %c %hhx\n", xk2ev(sym), mod2int(mod));
 359                 wm_handle_event(win, xk2ev(sym), mod, ptr);
 360         }
 361         else if (type == KeyRelease) {
 362                 //printf("release: %d\n", type);
 363         }
 364         else if (type == ButtonPress) {
 365                 if (wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr))
 366                         XGrabPointer(dpy, xe->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 367                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 368                 else
 369                         XAllowEvents(win->sys->dpy, ReplayPointer, CurrentTime);
 370         }
 371         else if (type == ButtonRelease) {
 372                 XUngrabPointer(dpy, CurrentTime);
 373                 wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr);
 374         }
 375         else if (type == MotionNotify) {
 376                 while (XCheckTypedEvent(dpy, MotionNotify, xe));
 377                 wm_handle_ptr(win, ptr);
 378         }
 379         else if (type == EnterNotify || type == LeaveNotify) {
 380                 printf("%s: %d\n", type==EnterNotify?"enter":"leave", type);
 381                 event_t ev = EnterNotify ? EV_ENTER : EV_LEAVE;
 382                 if ((win = win_find(dpy,xe->xcrossing.window,0)))
 383                         wm_handle_event(win, ev, MOD(), PTR());
 384         }
 385         else if (type == FocusIn || type == FocusOut) {
 386                 //printf("focus: %d\n", type);
 387                 event_t ev = FocusIn ? EV_FOCUS : EV_UNFOCUS;
 388                 if ((win = win_find(dpy,xe->xfocus.window,0)))
 389                         wm_handle_event(win, ev, MOD(), PTR());
 390         }
 391         else if (type == ConfigureNotify) {
 392                 printf("configure: %d\n", type);
 393         }
 394         else if (type == MapNotify) {
 395                 printf("map: %d\n", type);
 396         }
 397         else if (type == UnmapNotify) {
 398                 if ((win = win_find(dpy,xe->xunmap.window,0)) &&
 399                      win->sys->state != ST_HIDE) {
 400                         if (!strut_del(root, win))
 401                                 wm_remove(win);
 402                         else
 403                                 wm_update();
 404                         win->sys->state = ST_HIDE;
 405                 }
 406         }
 407         else if (type == DestroyNotify) {
 408                 //printf("destroy: %d\n", type);
 409                 if ((win = win_find(dpy,xe->xdestroywindow.window,0)))
 410                         win_remove(win);
 411         }
 412         else if (type == ConfigureRequest) {
 413                 XConfigureRequestEvent *cre = &xe->xconfigurerequest;
 414                 printf("configure_req: %d - %x, (0x%lx) %dx%d @ %d,%d\n",
 415                                 type, (int)cre->window, cre->value_mask,
 416                                 cre->height, cre->width, cre->x, cre->y);
 417                 if ((win = win_find(dpy,xe->xmaprequest.window,1))) {
 418                         XSendEvent(dpy, cre->window, False, StructureNotifyMask, &(XEvent){
 419                                 .xconfigure.type              = ConfigureNotify,
 420                                 .xconfigure.display           = win->sys->dpy,
 421                                 .xconfigure.event             = win->sys->xid,
 422                                 .xconfigure.window            = win->sys->xid,
 423                                 .xconfigure.x                 = win->x,
 424                                 .xconfigure.y                 = win->y,
 425                                 .xconfigure.width             = win->w,
 426                                 .xconfigure.height            = win->h,
 427                                 .xconfigure.border_width      = border,
 428                         });
 429                         XSync(win->sys->dpy, False);
 430                 }
 431         }
 432         else if (type == MapRequest) {
 433                 printf("map_req: %d\n", type);
 434                 if ((win = win_find(dpy,xe->xmaprequest.window,1))) {
 435                         XSelectInput(win->sys->dpy, win->sys->xid, PropertyChangeMask);
 436                         if (!strut_add(root, win))
 437                                 wm_insert(win);
 438                         else
 439                                 wm_update();
 440                 }
 441                 XMapWindow(dpy, xe->xmaprequest.window);
 442         }
 443         else if (type == ClientMessage) {
 444                 printf("msg: %d\n", type);
 445                 XClientMessageEvent *cme = &xe->xclient;
 446                 if ((win = win_find(dpy,cme->window,0))     &&
 447                     (cme->message_type == atoms[NET_STATE]) &&
 448                     (cme->data.l[1] == atoms[NET_FULL] ||
 449                      cme->data.l[2] == atoms[NET_FULL])) {
 450                         if (cme->data.l[0] == 1 || /* _NET_WM_STATE_ADD    */
 451                            (cme->data.l[0] == 2 && /* _NET_WM_STATE_TOGGLE */
 452                             win->sys->state != ST_FULL))
 453                                 sys_show(win, ST_FULL);
 454                         else
 455                                 sys_show(win, ST_SHOW);
 456                 }
 457         }
 458         else if (type == PropertyNotify) {
 459                 printf("prop: %d\n", type);
 460         }
 461         else {
 462                 printf("unknown event: %d\n", type);
 463         }
 464 }
 465
 466 static int xerror(Display *dpy, XErrorEvent *err)
 467 {
 468         if (err->error_code == BadWindow ||
 469             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 470             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 471             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 472             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 473             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 474             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 475             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 476             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 477                 return 0;
 478         if (err->request_code == X_ChangeWindowAttributes && err->error_code == BadAccess)
 479                 error("Another window manager is already running");
 480         return xerrorxlib(dpy, err);
 481 }
 482
 483 /********************
 484  * System functions *
 485  ********************/
 486 void sys_move(win_t *win, int x, int y, int w, int h)
 487 {
 488         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 489         int b = 2*border;
 490         win->x = x; win->y = y;
 491         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 492         w      = MAX(w-b,1); h      = MAX(h-b,1);
 493         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 494
 495         /* Flush events, so moving window doesn't cause re-focus
 496          * There's probably a better way to do this */
 497         XEvent xe;
 498         XSync(win->sys->dpy, False);
 499         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &xe))
 500                 printf("Skipping enter/leave event\n");
 501 }
 502
 503 void sys_raise(win_t *win)
 504 {
 505         //printf("sys_raise: %p\n", win);
 506         XRaiseWindow(win->sys->dpy, win->sys->xid);
 507         for (list_t *cur = struts; cur; cur = cur->next)
 508                 XRaiseWindow(((win_t*)cur->data)->sys->dpy,
 509                              ((win_t*)cur->data)->sys->xid);
 510 }
 511
 512 void sys_focus(win_t *win)
 513 {
 514         printf("sys_focus: %p\n", win);
 515
 516         /* Set actual focus */
 517         XSetInputFocus(win->sys->dpy, win->sys->xid,
 518                         RevertToPointerRoot, CurrentTime);
 519         win_msg(win, WM_FOCUS);
 520
 521         /* Set border on focused window */
 522         static win_t *last = NULL;
 523         if (last)
 524                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[CLR_UNFOCUS]);
 525         XSync(win->sys->dpy, False);
 526         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[CLR_FOCUS]);
 527         last = win;
 528 }
 529
 530 void sys_show(win_t *win, state_t state)
 531 {
 532         /* Restore from fullscreen */
 533         switch (state) {
 534         case ST_SHOW:
 535                 printf("sys_show: show\n");
 536                 if (win->sys->state == ST_FULL)
 537                         sys_move(win, win->x, win->y, win->w, win->h);
 538                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, border);
 539                 XMapWindow(win->sys->dpy, win->sys->xid);
 540                 XSync(win->sys->dpy, False);
 541                 break;
 542         case ST_FULL:
 543                 printf("sys_show: full\n");
 544                 win_t *screen = NULL;
 545                 for (list_t *cur = screens; cur; cur = cur->next) {
 546                         screen = cur->data;
 547                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 548                             win->y >= screen->y && win->y <= screen->y+screen->h)
 549                                 break;
 550                 }
 551                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, 0);
 552                 XMapWindow(win->sys->dpy, win->sys->xid);
 553                 XMoveResizeWindow(win->sys->dpy, win->sys->xid,
 554                         screen->x - screen->sys->strut.left,
 555                         screen->y - screen->sys->strut.top,
 556                         screen->w + screen->sys->strut.left + screen->sys->strut.right,
 557                         screen->h + screen->sys->strut.top  + screen->sys->strut.bottom);
 558                 XRaiseWindow(win->sys->dpy, win->sys->xid);
 559                 break;
 560         case ST_SHADE:
 561                 printf("sys_show: shade\n");
 562                 XMapWindow(win->sys->dpy, win->sys->xid);
 563                 break;
 564         case ST_ICON:
 565                 printf("sys_show: icon\n");
 566                 break;
 567         case ST_HIDE:
 568                 printf("sys_show: hide\n");
 569                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 570                 break;
 571         case ST_CLOSE:
 572                 printf("sys_show: close\n");
 573                 XDestroyWindow(win->sys->dpy, win->sys->xid);
 574                 break;
 575         }
 576         win->sys->state = state;
 577 }
 578
 579 void sys_watch(win_t *win, event_t ev, mod_t mod)
 580 {
 581         //printf("sys_watch: %p - %x %hhx\n", win, ev, mod);
 582         XWindowAttributes attr;
 583         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 584         long mask = attr.your_event_mask;
 585         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 586                 XGrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid, False,
 587                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 588                                 GrabModeSync, GrabModeAsync, None, None);
 589         else if (ev == EV_ENTER)
 590                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 591         else if (ev == EV_LEAVE)
 592                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 593         else if (ev == EV_FOCUS || ev == EV_UNFOCUS)
 594                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 595         else
 596                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, ev2xk(ev)),
 597                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 598 }
 599
 600 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 601 {
 602         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 603                 XUngrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid);
 604 }
 605
 606 list_t *sys_info(win_t *win)
 607 {
 608         /* Use global copy of screens so we can add struts */
 609         if (screens == NULL) {
 610                 /* Add Xinerama screens */
 611                 int n = 0;
 612                 XineramaScreenInfo *info = NULL;
 613                 if (XineramaIsActive(win->sys->dpy))
 614                         info = XineramaQueryScreens(win->sys->dpy, &n);
 615                 for (int i = 0; i < n; i++) {
 616                         win_t *screen = new0(win_t);
 617                         screen->x = info[i].x_org;
 618                         screen->y = info[i].y_org;
 619                         screen->w = info[i].width;
 620                         screen->h = info[i].height;
 621                         screen->sys = new0(win_sys_t);
 622                         screens = list_append(screens, screen);
 623                 }
 624         }
 625         if (screens == NULL) {
 626                 /* No xinerama support */
 627                 win_t *screen = new0(win_t);
 628                 *screen = *win;
 629                 screens = list_insert(NULL, screen);
 630         }
 631         return screens;
 632 }
 633
 634 win_t *sys_init(void)
 635 {
 636         Display *dpy;
 637         Window   xid;
 638
 639         /* Load configuration */
 640         border     = conf_get_int("main.border",     border);
 641         no_capture = conf_get_int("main.no-capture", no_capture);
 642
 643         /* Open the display */
 644         if (!(dpy = XOpenDisplay(NULL)))
 645                 error("Unable to get display");
 646         if (!(xid = DefaultRootWindow(dpy)))
 647                 error("Unable to get root window");
 648
 649         /* Setup X11 data */
 650         atoms[WM_PROTO]  = XInternAtom(dpy, "WM_PROTOCOLS",  False);
 651         atoms[WM_FOCUS]  = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
 652         atoms[NET_STATE] = XInternAtom(dpy, "_NET_WM_STATE", False);
 653         atoms[NET_FULL]  = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
 654         atoms[NET_STRUT] = XInternAtom(dpy, "_NET_WM_STRUT", False);
 655
 656         colors[CLR_FOCUS]   = get_color(dpy, "#a0a0ff");
 657         colors[CLR_UNFOCUS] = get_color(dpy, "#101066");
 658         colors[CLR_URGENT]  = get_color(dpy, "#ff0000");
 659         //printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 660
 661         /* Select window management events */
 662         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 663         xerrorxlib = XSetErrorHandler(xerror);
 664
 665         return win_find(dpy, xid, 1);
 666 }
 667
 668 void sys_run(win_t *root)
 669 {
 670         /* Add each initial window */
 671         if (!no_capture) {
 672                 unsigned int nkids;
 673                 Window par, xid, *kids = NULL;
 674                 if (XQueryTree(root->sys->dpy, root->sys->xid,
 675                                         &par, &xid, &kids, &nkids)) {
 676                         for(int i = 0; i < nkids; i++) {
 677                                 win_t *win = win_find(root->sys->dpy, kids[i], 1);
 678                                 if (win && win_viewable(win) && !strut_add(root,win))
 679                                         wm_insert(win);
 680                         }
 681                         XFree(kids);
 682                 }
 683                 wm_update(); // For struts
 684         }
 685
 686         /* Main loop */
 687         running = 1;
 688         while (running)
 689         {
 690                 XEvent xe;
 691                 XNextEvent(root->sys->dpy, &xe);
 692                 process_event(xe.type, &xe, root);
 693         }
 694 }
 695
 696 void sys_exit(void)
 697 {
 698         running = 0;
 699 }
 700
 701 void sys_free(win_t *root)
 702 {
 703         XCloseDisplay(root->sys->dpy);
 704         while (screens) {
 705                 win_free(screens->data);
 706                 screens = list_remove(screens, screens, 0);
 707         }
 708         tdestroy(cache, (void(*)(void*))win_free);
 709 }