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