Pileus Git - wmpus/blob - sys-xlib.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 "types.h"
  30 #include "sys.h"
  31 #include "wm.h"
  32
  33 /* Configuration */
  34 static int border     = 2;
  35 static int no_capture = 0;
  36 static int stack      = 25;
  37
  38 /* Internal structures */
  39 struct win_sys {
  40         Window   xid;
  41         Display *dpy;
  42         struct {
  43                 int left, right, top, bottom;
  44         } strut;
  45 };
  46
  47 typedef struct {
  48         event_t ev;
  49         int     sym;
  50 } event_map_t;
  51
  52 typedef enum {
  53         WM_PROTO, WM_FOCUS, WM_DELETE,
  54         NET_STATE, NET_FULL, NET_STRUT,
  55         NET_TYPE, NET_DIALOG,
  56         NATOMS
  57 } atom_t;
  58
  59 typedef enum {
  60         CLR_FOCUS, CLR_UNFOCUS, CLR_URGENT, NCOLORS
  61 } color_t;
  62
  63 /* Global data */
  64 static win_t *root;
  65 static win_t *last;
  66 static int   running;
  67 static void *cache;
  68 static Atom atoms[NATOMS];
  69 static int (*xerrorxlib)(Display *, XErrorEvent *);
  70 static unsigned long colors[NCOLORS];
  71 static list_t *screens;
  72 static list_t *struts;
  73
  74 /* Debug functions */
  75 static char *state_map[] = {
  76         [ST_HIDE ] "hide ",
  77         [ST_SHOW ] "show ",
  78         [ST_FULL ] "full ",
  79         [ST_MAX  ] "max  ",
  80         [ST_SHADE] "shade",
  81         [ST_ICON ] "icon ",
  82         [ST_CLOSE] "close",
  83 };
  84
  85 /* Conversion functions */
  86 static event_map_t ev2sym[] = {
  87         {EV_LEFT    , XK_Left },
  88         {EV_RIGHT   , XK_Right},
  89         {EV_UP      , XK_Up   },
  90         {EV_DOWN    , XK_Down },
  91         {EV_HOME    , XK_Home },
  92         {EV_END     , XK_End  },
  93         {EV_PAGEUP  , XK_Prior},
  94         {EV_PAGEDOWN, XK_Next },
  95         {EV_F1      , XK_F1   },
  96         {EV_F2      , XK_F2   },
  97         {EV_F3      , XK_F3   },
  98         {EV_F4      , XK_F4   },
  99         {EV_F5      , XK_F5   },
 100         {EV_F6      , XK_F6   },
 101         {EV_F7      , XK_F7   },
 102         {EV_F8      , XK_F8   },
 103         {EV_F9      , XK_F9   },
 104         {EV_F10     , XK_F10  },
 105         {EV_F11     , XK_F11  },
 106         {EV_F12     , XK_F12  },
 107 };
 108
 109 /* - Modifiers */
 110 static mod_t x2mod(unsigned int state, int up)
 111 {
 112         return (mod_t){
 113                .alt   = !!(state & Mod1Mask   ),
 114                .ctrl  = !!(state & ControlMask),
 115                .shift = !!(state & ShiftMask  ),
 116                .win   = !!(state & Mod4Mask   ),
 117                .up    = up,
 118         };
 119 }
 120
 121 static unsigned int mod2x(mod_t mod)
 122 {
 123         return (mod.alt   ? Mod1Mask    : 0)
 124              | (mod.ctrl  ? ControlMask : 0)
 125              | (mod.shift ? ShiftMask   : 0)
 126              | (mod.win   ? Mod4Mask    : 0);
 127 }
 128
 129 /* - Keycodes */
 130 static event_t xk2ev(KeySym sym)
 131 {
 132         event_map_t *em = map_getr(ev2sym,sym);
 133         return em ? em->ev : sym;
 134 }
 135
 136 static KeySym ev2xk(event_t ev)
 137 {
 138         event_map_t *em = map_get(ev2sym,ev);
 139         return em ? em->sym : ev;
 140 }
 141
 142 static event_t xb2ev(int btn)
 143 {
 144         return btn + EV_MOUSE0;
 145 }
 146
 147 static int ev2xb(event_t ev)
 148 {
 149         return ev - EV_MOUSE0;
 150 }
 151
 152 /* - Pointers */
 153 static ptr_t x2ptr(XEvent *xe)
 154 {
 155         XKeyEvent *xke = &xe->xkey;
 156         return (ptr_t){xke->x, xke->y, xke->x_root, xke->y_root};
 157 }
 158
 159 static Window getfocus(win_t *root, XEvent *xe)
 160 {
 161         int revert;
 162         Window focus = PointerRoot;
 163         if (xe->type == KeyPress || xe->type == KeyRelease)
 164                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 165         if (focus == PointerRoot)
 166                 focus = xe->xkey.subwindow;
 167         if (focus == None)
 168                 focus = xe->xkey.window;
 169         return focus;
 170 }
 171
 172 /* Strut functions
 173  *   Struts are spaces at the edges of the screen that are used by
 174  *   toolbars and statusbars such as dzen. */
 175 static int strut_copy(win_t *to, win_t *from, int scale)
 176 {
 177         int left   = from->sys->strut.left;
 178         int right  = from->sys->strut.right;
 179         int top    = from->sys->strut.top;
 180         int bottom = from->sys->strut.bottom;
 181         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 182                 return 0;
 183         to->x += scale*(left      );
 184         to->y += scale*(top       );
 185         to->w -= scale*(left+right);
 186         to->h -= scale*(top+bottom);
 187         to->sys->strut.left   += scale*left;
 188         to->sys->strut.right  += scale*right;
 189         to->sys->strut.top    += scale*top;
 190         to->sys->strut.bottom += scale*bottom;
 191         return 1;
 192 }
 193
 194 static int strut_add(win_t *root, win_t *win)
 195 {
 196         /* Get X11 strut data */
 197         Atom ret_type;
 198         int ret_size;
 199         unsigned long ret_items, bytes_left;
 200         unsigned char *xdata;
 201         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 202                         atoms[NET_STRUT], 0L, 4L, False, XA_CARDINAL,
 203                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 204         if (status != Success || ret_size != 32 || ret_items != 4)
 205                 return 0;
 206
 207         win->sys->strut.left   = ((long*)xdata)[0];
 208         win->sys->strut.right  = ((long*)xdata)[1];
 209         win->sys->strut.top    = ((long*)xdata)[2];
 210         win->sys->strut.bottom = ((long*)xdata)[3];
 211         struts = list_insert(struts, win);
 212         for (list_t *cur = screens; cur; cur = cur->next)
 213                 strut_copy(cur->data, win, 1);
 214         return strut_copy(root, win, 1);
 215 }
 216
 217 static int strut_del(win_t *root, win_t *win)
 218 {
 219         list_t *lwin = list_find(struts, win);
 220         if (lwin)
 221                 struts = list_remove(struts, lwin, 0);
 222         for (list_t *cur = screens; cur; cur = cur->next)
 223                 strut_copy(cur->data, win, -1);
 224         return strut_copy(root, win, -1);
 225 }
 226
 227 /* Window functions */
 228 static Atom win_prop(win_t *win, atom_t prop);
 229 static win_t *win_find(Display *dpy, Window xid, int create);
 230
 231 static win_t *win_new(Display *dpy, Window xid)
 232 {
 233         Window trans;
 234         XWindowAttributes attr;
 235         if (XGetWindowAttributes(dpy, xid, &attr))
 236                 if (attr.override_redirect)
 237                         return NULL;
 238
 239         win_t *win    = new0(win_t);
 240         win->x        = attr.x;
 241         win->y        = attr.y;
 242         win->w        = attr.width;
 243         win->h        = attr.height;
 244         win->sys      = new0(win_sys_t);
 245         win->sys->dpy = dpy;
 246         win->sys->xid = xid;
 247
 248         if (root) {
 249                 if (strut_add(root, win))
 250                         win->type = TYPE_TOOLBAR;
 251
 252                 if (win_prop(win, NET_TYPE) == atoms[NET_DIALOG])
 253                         win->type = TYPE_DIALOG;
 254
 255                 if (win_prop(win, NET_STATE) == atoms[NET_FULL])
 256                         win->state = ST_FULL;
 257
 258                 if (XGetTransientForHint(dpy, xid, &trans))
 259                         win->parent = win_find(dpy, trans, 0);
 260
 261                 XSelectInput(dpy, xid, PropertyChangeMask);
 262         }
 263
 264         printf("win_new: win=%p x11=(%p,%d) state=%x pos=(%d,%d %dx%d) type=%s\n",
 265                         win, dpy, (int)xid, win->state,
 266                         win->x, win->y, win->w, win->h,
 267                         win->type == TYPE_NORMAL  ? "normal"  :
 268                         win->type == TYPE_DIALOG  ? "dialog"  :
 269                         win->type == TYPE_TOOLBAR ? "toolbar" : "unknown");
 270
 271         if (root)
 272                 wm_insert(win);
 273
 274         return win;
 275 }
 276
 277 static int win_cmp(const void *_a, const void *_b)
 278 {
 279         const win_t *a = _a, *b = _b;
 280         if (a->sys->dpy < b->sys->dpy) return -1;
 281         if (a->sys->dpy > b->sys->dpy) return  1;
 282         if (a->sys->xid < b->sys->xid) return -1;
 283         if (a->sys->xid > b->sys->xid) return  1;
 284         return 0;
 285 }
 286
 287 static win_t *win_find(Display *dpy, Window xid, int create)
 288 {
 289         if (!dpy || !xid)
 290                 return NULL;
 291         //printf("win_find: %p, %d\n", dpy, (int)xid);
 292         win_sys_t sys = {.dpy=dpy, .xid=xid};
 293         win_t     tmp = {.sys=&sys};
 294         win_t **old = NULL, *new = NULL;
 295         if ((old = tfind(&tmp, &cache, win_cmp)))
 296                 return *old;
 297         if (create && (new = win_new(dpy,xid)))
 298                 tsearch(new, &cache, win_cmp);
 299         return new;
 300 }
 301
 302 static void win_free(win_t *win)
 303 {
 304         if (win == last)
 305                 last = NULL;
 306         free(win->sys);
 307         free(win);
 308 }
 309
 310 static void win_remove(win_t *win)
 311 {
 312         if (win != root) {
 313                 strut_del(root, win);
 314                 wm_remove(win);
 315         }
 316         tdelete(win, &cache, win_cmp);
 317         win_free(win);
 318 }
 319
 320 static int win_viewable(Display *dpy, Window xid)
 321 {
 322         XWindowAttributes attr;
 323         if (XGetWindowAttributes(dpy, xid, &attr))
 324                 return attr.map_state == IsViewable;
 325         else
 326                 return True;
 327 }
 328
 329 static int win_msg(win_t *win, atom_t msg)
 330 {
 331         int n, found = 0;
 332         Atom *protos;
 333         if (!XGetWMProtocols(win->sys->dpy, win->sys->xid, &protos, &n))
 334                 return 0;
 335
 336         while (!found && n--)
 337                 found = protos[n] == atoms[msg];
 338         XFree(protos);
 339         if (!found)
 340                 return 0;
 341
 342         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 343                 .xclient.type         = ClientMessage,
 344                 .xclient.window       = win->sys->xid,
 345                 .xclient.message_type = atoms[WM_PROTO],
 346                 .xclient.format       = 32,
 347                 .xclient.data.l[0]    = atoms[msg],
 348                 .xclient.data.l[1]    = CurrentTime,
 349         });
 350         return 1;
 351 }
 352
 353 static Atom win_prop(win_t *win, atom_t prop)
 354 {
 355         int format;
 356         unsigned long nitems, bytes;
 357         unsigned char *buf = NULL;
 358         Atom atom, type = XA_ATOM;
 359         if (XGetWindowProperty(win->sys->dpy, win->sys->xid, atoms[prop],
 360                         0L, sizeof(Atom), False, type, &type, &format, &nitems, &bytes, &buf) || !buf)
 361                 return 0;
 362         atom = *(Atom *)buf;
 363         XFree(buf);
 364         return atom;
 365 }
 366
 367 /* Drawing functions */
 368 static unsigned long get_color(Display *dpy, const char *name)
 369 {
 370         XColor color;
 371         int screen = DefaultScreen(dpy);
 372         Colormap cmap = DefaultColormap(dpy, screen);
 373         XAllocNamedColor(dpy, cmap, name, &color, &color);
 374         return color.pixel;
 375 }
 376
 377 /* Callbacks */
 378 static void process_event(int type, XEvent *xe, win_t *root)
 379 {
 380         Display  *dpy = root->sys->dpy;
 381         win_t *win = NULL;
 382         //printf("event: %d\n", type);
 383
 384         /* Common data for all these events ... */
 385         ptr_t ptr = {}; mod_t mod = {};
 386         if (type == KeyPress    || type == KeyRelease    ||
 387             type == ButtonPress || type == ButtonRelease ||
 388             type == MotionNotify) {
 389                 Window xid = getfocus(root, xe);
 390                 if (!(win = win_find(dpy,xid,0)))
 391                         return;
 392                 //printf("button-press %p\n", win);
 393                 ptr = x2ptr(xe);
 394                 mod = x2mod(xe->xkey.state, type==KeyRelease||type==ButtonRelease);
 395         }
 396
 397         /* Split based on event */
 398         if (type == KeyPress) {
 399                 while (XCheckTypedEvent(dpy, KeyPress, xe));
 400                 KeySym sym = XLookupKeysym(&xe->xkey, 0);
 401                 //printf("got xe %c %hhx\n", xk2ev(sym), mod2int(mod));
 402                 wm_handle_event(win, xk2ev(sym), mod, ptr);
 403         }
 404         else if (type == KeyRelease) {
 405                 //printf("release: %lx\n", xe->xkey.window);
 406         }
 407         else if (type == ButtonPress) {
 408                 if (wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr)) {
 409                         //printf("grab pointer\n");
 410                         XGrabPointer(dpy, xe->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 411                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 412                 } else {
 413                         //printf("allow events\n");
 414                         XAllowEvents(win->sys->dpy, ReplayPointer, xe->xbutton.time);
 415                 }
 416         }
 417         else if (type == ButtonRelease) {
 418                 XUngrabPointer(dpy, CurrentTime);
 419                 wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr);
 420         }
 421         else if (type == MotionNotify) {
 422                 while (XCheckTypedEvent(dpy, MotionNotify, xe));
 423                 wm_handle_ptr(win, ptr);
 424         }
 425         else if (type == EnterNotify || type == LeaveNotify) {
 426                 printf("%s: %lx\n", type==EnterNotify?"enter":"leave",
 427                                 xe->xcrossing.window);
 428                 event_t ev = type == EnterNotify ? EV_ENTER : EV_LEAVE;
 429                 if ((win = win_find(dpy,xe->xcrossing.window,0)))
 430                         wm_handle_event(win, ev, MOD(), PTR());
 431         }
 432         else if (type == FocusIn || type == FocusOut) {
 433                 //printf("focus: %lx\n", xe->xfocus.window);
 434                 event_t ev = type == FocusIn ? EV_FOCUS : EV_UNFOCUS;
 435                 if ((win = win_find(dpy,xe->xfocus.window,0)))
 436                         wm_handle_event(win, ev, MOD(), PTR());
 437         }
 438         else if (type == ConfigureNotify) {
 439                 //printf("configure: %lx\n", xe->xconfigure.window);
 440         }
 441         else if (type == MapNotify) {
 442                 printf("map: %lx\n", xe->xmap.window);
 443         }
 444         else if (type == UnmapNotify) {
 445                 if ((win = win_find(dpy,xe->xunmap.window,0)) &&
 446                      win->state != ST_HIDE) {
 447                         printf("unmap: %lx\n", xe->xunmap.window);
 448                         wm_handle_state(win, win->state, ST_HIDE);
 449                         win->state = ST_HIDE;
 450                 }
 451         }
 452         else if (type == DestroyNotify) {
 453                 printf("destroy: %lx\n", xe->xdestroywindow.window);
 454                 if ((win = win_find(dpy,xe->xdestroywindow.window,0)))
 455                         win_remove(win);
 456         }
 457         else if (type == ConfigureRequest) {
 458                 XConfigureRequestEvent *cre = &xe->xconfigurerequest;
 459                 printf("configure_req: %lx - (0x%lx) %dx%d @ %d,%d\n",
 460                                 cre->window, cre->value_mask,
 461                                 cre->height, cre->width, cre->x, cre->y);
 462                 if ((win = win_find(dpy,cre->window,1))) {
 463                         int border_width = (win->type == TYPE_TOOLBAR ? 0 : border);
 464                         XSendEvent(dpy, cre->window, False, StructureNotifyMask, &(XEvent){
 465                                 .xconfigure.type         = ConfigureNotify,
 466                                 .xconfigure.display      = win->sys->dpy,
 467                                 .xconfigure.event        = win->sys->xid,
 468                                 .xconfigure.window       = win->sys->xid,
 469                                 .xconfigure.x            = win->x,
 470                                 .xconfigure.y            = win->y,
 471                                 .xconfigure.width        = win->w,
 472                                 .xconfigure.height       = win->h,
 473                                 .xconfigure.border_width = border_width,
 474                         });
 475                         XSync(win->sys->dpy, False);
 476                 }
 477         }
 478         else if (type == MapRequest) {
 479                 printf("map_req: %lx\n", xe->xmaprequest.window);
 480                 win = win_find(dpy,xe->xmaprequest.window,1);
 481                 // fixme, for hide -> max, etc
 482                 if (win->state == ST_HIDE) {
 483                         wm_handle_state(win, win->state, ST_SHOW);
 484                         win->state = ST_SHOW;
 485                 }
 486                 sys_show(win, win->state);
 487         }
 488         else if (type == ClientMessage) {
 489                 XClientMessageEvent *cme = &xe->xclient;
 490                 printf("client_msg: %lx - %ld %ld,%ld,%ld,%ld,%ld\n",
 491                                 cme->window, cme->message_type,
 492                                 cme->data.l[0], cme->data.l[1], cme->data.l[2],
 493                                 cme->data.l[3], cme->data.l[4]);
 494                 if ((win = win_find(dpy,cme->window,0))     &&
 495                     (cme->message_type == atoms[NET_STATE]) &&
 496                     (cme->data.l[1] == atoms[NET_FULL] ||
 497                      cme->data.l[2] == atoms[NET_FULL])) {
 498                         state_t next = (cme->data.l[0] == 1 || /* _NET_WM_STATE_ADD    */
 499                                        (cme->data.l[0] == 2 && /* _NET_WM_STATE_TOGGLE */
 500                                         win->state != ST_FULL)) ? ST_FULL : ST_SHOW;
 501                         wm_handle_state(win, win->state, next);
 502                         sys_show(win, next);
 503                 }
 504         }
 505         else if (type == PropertyNotify) {
 506                 printf("prop: %lx - %d\n", xe->xproperty.window, xe->xproperty.state);
 507         }
 508         else {
 509                 printf("unknown event: %d\n", type);
 510         }
 511 }
 512
 513 static int xerror(Display *dpy, XErrorEvent *err)
 514 {
 515         if (err->error_code == BadWindow ||
 516             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 517             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 518             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 519             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 520             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 521             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 522             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 523             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 524                 return 0;
 525         if (err->request_code == X_ChangeWindowAttributes && err->error_code == BadAccess)
 526                 error("Another window manager is already running");
 527         return xerrorxlib(dpy, err);
 528 }
 529
 530 static int xnoerror(Display *dpy, XErrorEvent *err)
 531 {
 532         return 0;
 533 }
 534
 535
 536 /********************
 537  * System functions *
 538  ********************/
 539 void sys_move(win_t *win, int x, int y, int w, int h)
 540 {
 541         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 542         int b = 2*border;
 543         win->x = x; win->y = y;
 544         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 545         w      = MAX(w-b,1); h      = MAX(h-b,1);
 546         XConfigureWindow(win->sys->dpy, win->sys->xid, CWX|CWY|CWWidth|CWHeight,
 547                 &(XWindowChanges) { .x=x, .y=y, .width=w, .height=h });
 548         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 549
 550         /* Flush events, so moving window doesn't cause re-focus
 551          * There's probably a better way to do this */
 552         XEvent xe;
 553         XSync(win->sys->dpy, False);
 554         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &xe))
 555                 printf("Skipping enter/leave event\n");
 556 }
 557
 558 void sys_raise(win_t *win)
 559 {
 560         //printf("sys_raise: %p\n", win);
 561         XRaiseWindow(win->sys->dpy, win->sys->xid);
 562         for (list_t *cur = struts; cur; cur = cur->next)
 563                 XRaiseWindow(((win_t*)cur->data)->sys->dpy,
 564                              ((win_t*)cur->data)->sys->xid);
 565 }
 566
 567 void sys_focus(win_t *win)
 568 {
 569         //printf("sys_focus: %p\n", win);
 570
 571         /* Set actual focus */
 572         XSetInputFocus(win->sys->dpy, win->sys->xid,
 573                         RevertToPointerRoot, CurrentTime);
 574         //win_msg(win, WM_FOCUS);
 575
 576         /* Set border on focused window */
 577         if (last)
 578                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[CLR_UNFOCUS]);
 579         XSync(win->sys->dpy, False);
 580         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[CLR_FOCUS]);
 581         last = win;
 582 }
 583
 584 void sys_show(win_t *win, state_t state)
 585 {
 586         //if (win->state == state)
 587         //      return;
 588
 589         /* Debug */
 590         printf("sys_show: %p: %s -> %s\n", win,
 591                         state_map[win->state], state_map[state]);
 592
 593         /* Find screen */
 594         win_t *screen = NULL;
 595         if (state == ST_FULL || state == ST_MAX) {
 596                 for (list_t *cur = screens; cur; cur = cur->next) {
 597                         screen = cur->data;
 598                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 599                             win->y >= screen->y && win->y <= screen->y+screen->h)
 600                                 break;
 601                 }
 602         }
 603
 604         /* Update properties */
 605         if (state == ST_FULL)
 606                 XChangeProperty(win->sys->dpy, win->sys->xid, atoms[NET_STATE], XA_ATOM, 32,
 607                                 PropModeReplace, (unsigned char*)&atoms[NET_FULL], 1);
 608         else if (state != ST_FULL)
 609                 XChangeProperty(win->sys->dpy, win->sys->xid, atoms[NET_STATE], XA_ATOM, 32,
 610                                 PropModeReplace, (unsigned char*)0, 0);
 611
 612         /* Update border */
 613         if (win->type == TYPE_TOOLBAR || state == ST_FULL)
 614                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, 0);
 615         else if (state == ST_SHOW || state == ST_MAX || state == ST_SHADE)
 616                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, border);
 617
 618         /* Map/Unmap window */
 619         if (state == ST_SHOW || state == ST_FULL || state == ST_MAX || state == ST_SHADE)
 620                 XMapWindow(win->sys->dpy, win->sys->xid);
 621         else if (state == ST_HIDE)
 622                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 623
 624         /* Resize windows */
 625         if (state == ST_SHOW) {
 626                 sys_move(win, win->x, win->y, win->w, win->h);
 627         } else if (state == ST_MAX) {
 628                 sys_move(win, screen->x, screen->y, screen->w, screen->h);
 629         } else if (state == ST_FULL) {
 630                 XWindowChanges wc = {
 631                         .x      = screen->x - screen->sys->strut.left ,
 632                         .y      = screen->y - screen->sys->strut.top ,
 633                         .width  = screen->w + screen->sys->strut.left + screen->sys->strut.right,
 634                         .height = screen->h + screen->sys->strut.top  + screen->sys->strut.bottom
 635                 };
 636                 win->x = wc.x;     win->y = wc.y;
 637                 win->w = wc.width; win->h = wc.height;
 638                 XConfigureWindow(win->sys->dpy, win->sys->xid, CWX|CWY|CWWidth|CWHeight, &wc);
 639                 XMoveResizeWindow(win->sys->dpy, win->sys->xid, wc.x, wc.y, wc.width, wc.height);
 640         } else if (state == ST_SHADE) {
 641                 XConfigureWindow(win->sys->dpy, win->sys->xid, CWHeight,
 642                         &(XWindowChanges) { .height = stack });
 643         }
 644
 645         /* Raise window */
 646         if (state == ST_FULL || state == ST_MAX)
 647                 XRaiseWindow(win->sys->dpy, win->sys->xid);
 648
 649         /* Close windows */
 650         if (state == ST_CLOSE) {
 651                 if (!win_msg(win, WM_DELETE)) {
 652                         XGrabServer(win->sys->dpy);
 653                         XSetErrorHandler(xnoerror);
 654                         XSetCloseDownMode(win->sys->dpy, DestroyAll);
 655                         XKillClient(win->sys->dpy, win->sys->xid);
 656                         XSync(win->sys->dpy, False);
 657                         XSetErrorHandler(xerror);
 658                         XUngrabServer(win->sys->dpy);
 659                 }
 660         }
 661
 662         /* Update state */
 663         win->state = state;
 664 }
 665
 666 void sys_watch(win_t *win, event_t ev, mod_t mod)
 667 {
 668         //printf("sys_watch: %p - %x %hhx\n", win, ev, mod);
 669         if (win == NULL)
 670                 win = root;
 671         XWindowAttributes attr;
 672         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 673         long mask = attr.your_event_mask;
 674         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 675                 XGrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid, False,
 676                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 677                                 GrabModeSync, GrabModeAsync, None, None);
 678         else if (ev == EV_ENTER)
 679                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 680         else if (ev == EV_LEAVE)
 681                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 682         else if (ev == EV_FOCUS || ev == EV_UNFOCUS)
 683                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 684         else
 685                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, ev2xk(ev)),
 686                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 687 }
 688
 689 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 690 {
 691         if (win == NULL)
 692                 win = root;
 693         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 694                 XUngrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid);
 695 }
 696
 697 list_t *sys_info(void)
 698 {
 699         /* Use global copy of screens so we can add struts */
 700         if (screens == NULL) {
 701                 /* Add Xinerama screens */
 702                 int n = 0;
 703                 XineramaScreenInfo *info = NULL;
 704                 if (XineramaIsActive(root->sys->dpy))
 705                         info = XineramaQueryScreens(root->sys->dpy, &n);
 706                 for (int i = 0; i < n; i++) {
 707                         win_t *screen = new0(win_t);
 708                         screen->x = info[i].x_org;
 709                         screen->y = info[i].y_org;
 710                         screen->w = info[i].width;
 711                         screen->h = info[i].height;
 712                         screen->sys = new0(win_sys_t);
 713                         screens = list_append(screens, screen);
 714                 }
 715         }
 716         if (screens == NULL) {
 717                 /* No xinerama support */
 718                 win_t *screen = new0(win_t);
 719                 *screen = *root;
 720                 screens = list_insert(NULL, screen);
 721         }
 722         return screens;
 723 }
 724
 725 void sys_init(void)
 726 {
 727         Display *dpy;
 728         Window   xid;
 729
 730         /* Load configuration */
 731         stack      = conf_get_int("main.stack",      stack);
 732         border     = conf_get_int("main.border",     border);
 733         no_capture = conf_get_int("main.no-capture", no_capture);
 734
 735         /* Open the display */
 736         if (!(dpy = XOpenDisplay(NULL)))
 737                 error("Unable to get display");
 738         if (!(xid = DefaultRootWindow(dpy)))
 739                 error("Unable to get root window");
 740
 741         /* Setup X11 data */
 742         atoms[WM_PROTO]    = XInternAtom(dpy, "WM_PROTOCOLS",               False);
 743         atoms[WM_FOCUS]    = XInternAtom(dpy, "WM_TAKE_FOCUS",              False);
 744         atoms[WM_DELETE]   = XInternAtom(dpy, "WM_DELETE_WINDOW",           False);
 745         atoms[NET_STATE]   = XInternAtom(dpy, "_NET_WM_STATE",              False);
 746         atoms[NET_FULL]    = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN",   False);
 747         atoms[NET_STRUT]   = XInternAtom(dpy, "_NET_WM_STRUT",              False);
 748         atoms[NET_TYPE]    = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE",        False);
 749         atoms[NET_DIALOG]  = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 750
 751         colors[CLR_FOCUS]   = get_color(dpy, "#a0a0ff");
 752         colors[CLR_UNFOCUS] = get_color(dpy, "#101066");
 753         colors[CLR_URGENT]  = get_color(dpy, "#ff0000");
 754         //printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 755
 756         /* Select window management events */
 757         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 758         xerrorxlib = XSetErrorHandler(xerror);
 759
 760         root = win_find(dpy, xid, 1);
 761 }
 762
 763 void sys_run(void)
 764 {
 765         /* Add each initial window */
 766         if (!no_capture) {
 767                 unsigned int nkids;
 768                 Window par, xid, *kids = NULL;
 769                 if (XQueryTree(root->sys->dpy, root->sys->xid,
 770                                         &par, &xid, &kids, &nkids)) {
 771                         for(int i = 0; i < nkids; i++)
 772                                 if (win_viewable(root->sys->dpy, kids[i]))
 773                                         win_find(root->sys->dpy, kids[i], 1);
 774                         XFree(kids);
 775                 }
 776         }
 777
 778         /* Main loop */
 779         running = 1;
 780         while (running)
 781         {
 782                 XEvent xe;
 783                 XNextEvent(root->sys->dpy, &xe);
 784                 process_event(xe.type, &xe, root);
 785         }
 786 }
 787
 788 void sys_exit(void)
 789 {
 790         running = 0;
 791 }
 792
 793 void sys_free(void)
 794 {
 795         XCloseDisplay(root->sys->dpy);
 796         while (screens) {
 797                 win_free(screens->data);
 798                 screens = list_remove(screens, screens, 0);
 799         }
 800         tdestroy(cache, (void(*)(void*))win_free);
 801 }