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                 wm_insert(win);
 251         }
 252
 253         printf("win_new: %p = %p, %d (%d,%d %dx%d) - %s\n",
 254                         win, dpy, (int)xid,
 255                         win->x, win->y, win->w, win->h,
 256                         win->type == TYPE_NORMAL  ? "normal" :
 257                         win->type == TYPE_DIALOG  ? "dialog" :
 258                         win->type == TYPE_TOOLBAR ? "normal" : "unknown");
 259
 260         return win;
 261 }
 262
 263 static int win_cmp(const void *_a, const void *_b)
 264 {
 265         const win_t *a = _a, *b = _b;
 266         if (a->sys->dpy < b->sys->dpy) return -1;
 267         if (a->sys->dpy > b->sys->dpy) return  1;
 268         if (a->sys->xid < b->sys->xid) return -1;
 269         if (a->sys->xid > b->sys->xid) return  1;
 270         return 0;
 271 }
 272
 273 static win_t *win_find(Display *dpy, Window xid, int create)
 274 {
 275         if (!dpy || !xid)
 276                 return NULL;
 277         //printf("win_find: %p, %d\n", dpy, (int)xid);
 278         win_sys_t sys = {.dpy=dpy, .xid=xid};
 279         win_t     tmp = {.sys=&sys};
 280         win_t **old = NULL, *new = NULL;
 281         if ((old = tfind(&tmp, &cache, win_cmp)))
 282                 return *old;
 283         if (create && (new = win_new(dpy,xid)))
 284                 tsearch(new, &cache, win_cmp);
 285         return new;
 286 }
 287
 288 static void win_free(win_t *win)
 289 {
 290         free(win->sys);
 291         free(win);
 292 }
 293
 294 static void win_remove(win_t *win)
 295 {
 296         if (win != root) {
 297                 strut_del(root, win);
 298                 wm_remove(win);
 299         }
 300         tdelete(win, &cache, win_cmp);
 301         win_free(win);
 302 }
 303
 304 static int win_viewable(Display *dpy, Window xid)
 305 {
 306         XWindowAttributes attr;
 307         if (XGetWindowAttributes(dpy, xid, &attr))
 308                 return attr.map_state == IsViewable;
 309         else
 310                 return True;
 311 }
 312
 313 static int win_msg(win_t *win, atom_t msg)
 314 {
 315         int n, found = 0;
 316         Atom *protos;
 317         if (!XGetWMProtocols(win->sys->dpy, win->sys->xid, &protos, &n))
 318                 return 0;
 319
 320         while (!found && n--)
 321                 found = protos[n] == atoms[msg];
 322         XFree(protos);
 323         if (!found)
 324                 return 0;
 325
 326         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 327                 .type                 = ClientMessage,
 328                 .xclient.window       = win->sys->xid,
 329                 .xclient.message_type = atoms[WM_PROTO],
 330                 .xclient.format       = 32,
 331                 .xclient.data.l[0]    = atoms[msg],
 332                 .xclient.data.l[1]    = CurrentTime,
 333         });
 334         return 1;
 335 }
 336
 337 static Atom win_prop(win_t *win, atom_t prop)
 338 {
 339         int format;
 340         unsigned long nitems, bytes;
 341         unsigned char *buf = NULL;
 342         Atom atom, type = XA_ATOM;
 343         if (XGetWindowProperty(win->sys->dpy, win->sys->xid, atoms[prop],
 344                         0L, sizeof(Atom), False, type, &type, &format, &nitems, &bytes, &buf) || !buf)
 345                 return 0;
 346         atom = *(Atom *)buf;
 347         XFree(buf);
 348         return atom;
 349 }
 350
 351 /* Drawing functions */
 352 static unsigned long get_color(Display *dpy, const char *name)
 353 {
 354         XColor color;
 355         int screen = DefaultScreen(dpy);
 356         Colormap cmap = DefaultColormap(dpy, screen);
 357         XAllocNamedColor(dpy, cmap, name, &color, &color);
 358         return color.pixel;
 359 }
 360
 361 /* Callbacks */
 362 static void process_event(int type, XEvent *xe, win_t *root)
 363 {
 364         Display  *dpy = root->sys->dpy;
 365         win_t *win = NULL;
 366         //printf("event: %d\n", type);
 367
 368         /* Common data for all these events ... */
 369         ptr_t ptr = {}; mod_t mod = {};
 370         if (type == KeyPress    || type == KeyRelease    ||
 371             type == ButtonPress || type == ButtonRelease ||
 372             type == MotionNotify) {
 373                 Window xid = getfocus(root, xe);
 374                 if (!(win = win_find(dpy,xid,0)))
 375                         return;
 376                 //printf("button-press %p\n", win);
 377                 ptr = x2ptr(xe);
 378                 mod = x2mod(xe->xkey.state, type==KeyRelease||type==ButtonRelease);
 379         }
 380
 381         /* Split based on event */
 382         if (type == KeyPress) {
 383                 while (XCheckTypedEvent(dpy, KeyPress, xe));
 384                 KeySym sym = XLookupKeysym(&xe->xkey, 0);
 385                 printf("got xe %c %hhx\n", xk2ev(sym), mod2int(mod));
 386                 wm_handle_event(win, xk2ev(sym), mod, ptr);
 387         }
 388         else if (type == KeyRelease) {
 389                 //printf("release: %lx\n", xe->xkey.window);
 390         }
 391         else if (type == ButtonPress) {
 392                 if (wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr)) {
 393                         //printf("grab pointer\n");
 394                         XGrabPointer(dpy, xe->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 395                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 396                 } else {
 397                         //printf("allow events\n");
 398                         XAllowEvents(win->sys->dpy, ReplayPointer, xe->xbutton.time);
 399                 }
 400         }
 401         else if (type == ButtonRelease) {
 402                 XUngrabPointer(dpy, CurrentTime);
 403                 wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr);
 404         }
 405         else if (type == MotionNotify) {
 406                 while (XCheckTypedEvent(dpy, MotionNotify, xe));
 407                 wm_handle_ptr(win, ptr);
 408         }
 409         else if (type == EnterNotify || type == LeaveNotify) {
 410                 printf("%s: %lx\n", type==EnterNotify?"enter":"leave",
 411                                 xe->xcrossing.window);
 412                 event_t ev = type == EnterNotify ? EV_ENTER : EV_LEAVE;
 413                 if ((win = win_find(dpy,xe->xcrossing.window,0)))
 414                         wm_handle_event(win, ev, MOD(), PTR());
 415         }
 416         else if (type == FocusIn || type == FocusOut) {
 417                 //printf("focus: %lx\n", xe->xfocus.window);
 418                 event_t ev = type == FocusIn ? EV_FOCUS : EV_UNFOCUS;
 419                 if ((win = win_find(dpy,xe->xfocus.window,0)))
 420                         wm_handle_event(win, ev, MOD(), PTR());
 421         }
 422         else if (type == ConfigureNotify) {
 423                 //printf("configure: %lx\n", xe->xconfigure.window);
 424         }
 425         else if (type == MapNotify) {
 426                 printf("map: %lx\n", xe->xmap.window);
 427         }
 428         else if (type == UnmapNotify) {
 429                 if ((win = win_find(dpy,xe->xunmap.window,0)) &&
 430                      win->state != ST_HIDE) {
 431                         wm_handle_state(win, win->state, ST_HIDE);
 432                         win->state = ST_HIDE;
 433                 }
 434         }
 435         else if (type == DestroyNotify) {
 436                 printf("destroy: %lx\n", xe->xdestroywindow.window);
 437                 if ((win = win_find(dpy,xe->xdestroywindow.window,0)))
 438                         win_remove(win);
 439         }
 440         else if (type == ConfigureRequest) {
 441                 XConfigureRequestEvent *cre = &xe->xconfigurerequest;
 442                 printf("configure_req: %lx - (0x%lx) %dx%d @ %d,%d\n",
 443                                 cre->window, cre->value_mask,
 444                                 cre->height, cre->width, cre->x, cre->y);
 445                 if ((win = win_find(dpy,xe->xconfigurerequest.window,1))) {
 446                         XSendEvent(dpy, cre->window, False, StructureNotifyMask, &(XEvent){
 447                                 .xconfigure.type              = ConfigureNotify,
 448                                 .xconfigure.display           = win->sys->dpy,
 449                                 .xconfigure.event             = win->sys->xid,
 450                                 .xconfigure.window            = win->sys->xid,
 451                                 .xconfigure.x                 = win->x,
 452                                 .xconfigure.y                 = win->y,
 453                                 .xconfigure.width             = win->w,
 454                                 .xconfigure.height            = win->h,
 455                                 .xconfigure.border_width      = border,
 456                         });
 457                         XSync(win->sys->dpy, False);
 458                 }
 459         }
 460         else if (type == MapRequest) {
 461                 printf("map_req: %lx\n", xe->xmaprequest.window);
 462                 win = win_find(dpy,xe->xmaprequest.window,1);
 463                 // fixme, for hide -> max, etc
 464                 if (win->state == ST_HIDE)
 465                         win->state = ST_SHOW;
 466                 sys_show(win, win->state);
 467         }
 468         else if (type == ClientMessage) {
 469                 XClientMessageEvent *cme = &xe->xclient;
 470                 printf("client_msg: %lx - %ld %ld,%ld,%ld,%ld,%ld\n",
 471                                 cme->window, cme->message_type,
 472                                 cme->data.l[0], cme->data.l[1], cme->data.l[2],
 473                                 cme->data.l[3], cme->data.l[4]);
 474                 if ((win = win_find(dpy,cme->window,0))     &&
 475                     (cme->message_type == atoms[NET_STATE]) &&
 476                     (cme->data.l[1] == atoms[NET_FULL] ||
 477                      cme->data.l[2] == atoms[NET_FULL])) {
 478                         state_t next = (cme->data.l[0] == 1 || /* _NET_WM_STATE_ADD    */
 479                                        (cme->data.l[0] == 2 && /* _NET_WM_STATE_TOGGLE */
 480                                         win->state != ST_FULL)) ? ST_FULL : ST_SHOW;
 481                         wm_handle_state(win, win->state, next);
 482                         sys_show(win, next);
 483                 }
 484         }
 485         else if (type == PropertyNotify) {
 486                 printf("prop: %d\n", xe->xproperty.state);
 487         }
 488         else {
 489                 printf("unknown event: %d\n", type);
 490         }
 491 }
 492
 493 static int xerror(Display *dpy, XErrorEvent *err)
 494 {
 495         if (err->error_code == BadWindow ||
 496             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 497             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 498             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 499             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 500             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 501             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 502             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 503             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 504                 return 0;
 505         if (err->request_code == X_ChangeWindowAttributes && err->error_code == BadAccess)
 506                 error("Another window manager is already running");
 507         return xerrorxlib(dpy, err);
 508 }
 509
 510 static int xnoerror(Display *dpy, XErrorEvent *err)
 511 {
 512         return 0;
 513 }
 514
 515
 516 /********************
 517  * System functions *
 518  ********************/
 519 void sys_move(win_t *win, int x, int y, int w, int h)
 520 {
 521         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 522         int b = 2*border;
 523         win->x = x; win->y = y;
 524         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 525         w      = MAX(w-b,1); h      = MAX(h-b,1);
 526         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 527
 528         /* Flush events, so moving window doesn't cause re-focus
 529          * There's probably a better way to do this */
 530         XEvent xe;
 531         XSync(win->sys->dpy, False);
 532         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &xe))
 533                 printf("Skipping enter/leave event\n");
 534 }
 535
 536 void sys_raise(win_t *win)
 537 {
 538         //printf("sys_raise: %p\n", win);
 539         XRaiseWindow(win->sys->dpy, win->sys->xid);
 540         for (list_t *cur = struts; cur; cur = cur->next)
 541                 XRaiseWindow(((win_t*)cur->data)->sys->dpy,
 542                              ((win_t*)cur->data)->sys->xid);
 543 }
 544
 545 void sys_focus(win_t *win)
 546 {
 547         printf("sys_focus: %p\n", win);
 548
 549         /* Set actual focus */
 550         XSetInputFocus(win->sys->dpy, win->sys->xid,
 551                         RevertToPointerRoot, CurrentTime);
 552         win_msg(win, WM_FOCUS);
 553
 554         /* Set border on focused window */
 555         static win_t *last = NULL;
 556         if (last)
 557                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[CLR_UNFOCUS]);
 558         XSync(win->sys->dpy, False);
 559         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[CLR_FOCUS]);
 560         last = win;
 561 }
 562
 563 void sys_show(win_t *win, state_t state)
 564 {
 565         switch (state) {
 566         case ST_HIDE:
 567                 printf("sys_show: hide %p\n", win);
 568                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 569                 break;
 570         case ST_SHOW:
 571                 printf("sys_show: show %p\n", win);
 572                 if (win->state == ST_FULL)
 573                         sys_move(win, win->x, win->y, win->w, win->h);
 574                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, border);
 575                 XMapWindow(win->sys->dpy, win->sys->xid);
 576                 XSync(win->sys->dpy, False);
 577                 break;
 578         case ST_MAX:
 579                 printf("sys_show: max %p\n", win);
 580                 XMapWindow(win->sys->dpy, win->sys->xid);
 581                 break;
 582         case ST_FULL:
 583                 printf("sys_show: full %p\n", win);
 584                 win_t *screen = NULL;
 585                 for (list_t *cur = screens; cur; cur = cur->next) {
 586                         screen = cur->data;
 587                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 588                             win->y >= screen->y && win->y <= screen->y+screen->h)
 589                                 break;
 590                 }
 591                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, 0);
 592                 XMapWindow(win->sys->dpy, win->sys->xid);
 593                 XMoveResizeWindow(win->sys->dpy, win->sys->xid,
 594                         screen->x - screen->sys->strut.left,
 595                         screen->y - screen->sys->strut.top,
 596                         screen->w + screen->sys->strut.left + screen->sys->strut.right,
 597                         screen->h + screen->sys->strut.top  + screen->sys->strut.bottom);
 598                 XRaiseWindow(win->sys->dpy, win->sys->xid);
 599                 break;
 600         case ST_SHADE:
 601                 printf("sys_show: shade %p\n", win);
 602                 XConfigureWindow(win->sys->dpy, win->sys->xid, CWHeight,
 603                                 &(XWindowChanges){ .height = stack });
 604                 XMapWindow(win->sys->dpy, win->sys->xid);
 605                 break;
 606         case ST_ICON:
 607                 printf("sys_show: icon %p\n", win);
 608                 break;
 609         case ST_CLOSE:
 610                 printf("sys_show: close %p\n", win);
 611                 if (!win_msg(win, WM_DELETE)) {
 612                         XGrabServer(win->sys->dpy);
 613                         XSetErrorHandler(xnoerror);
 614                         XSetCloseDownMode(win->sys->dpy, DestroyAll);
 615                         XKillClient(win->sys->dpy, win->sys->xid);
 616                         XSync(win->sys->dpy, False);
 617                         XSetErrorHandler(xerror);
 618                         XUngrabServer(win->sys->dpy);
 619                 }
 620                 XDestroyWindow(win->sys->dpy, win->sys->xid);
 621                 break;
 622         }
 623         win->state = state;
 624 }
 625
 626 void sys_watch(win_t *win, event_t ev, mod_t mod)
 627 {
 628         //printf("sys_watch: %p - %x %hhx\n", win, ev, mod);
 629         XWindowAttributes attr;
 630         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 631         long mask = attr.your_event_mask;
 632         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 633                 XGrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid, False,
 634                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 635                                 GrabModeSync, GrabModeAsync, None, None);
 636         else if (ev == EV_ENTER)
 637                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 638         else if (ev == EV_LEAVE)
 639                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 640         else if (ev == EV_FOCUS || ev == EV_UNFOCUS)
 641                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 642         else
 643                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, ev2xk(ev)),
 644                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 645 }
 646
 647 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 648 {
 649         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 650                 XUngrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid);
 651 }
 652
 653 list_t *sys_info(win_t *win)
 654 {
 655         /* Use global copy of screens so we can add struts */
 656         if (screens == NULL) {
 657                 /* Add Xinerama screens */
 658                 int n = 0;
 659                 XineramaScreenInfo *info = NULL;
 660                 if (XineramaIsActive(win->sys->dpy))
 661                         info = XineramaQueryScreens(win->sys->dpy, &n);
 662                 for (int i = 0; i < n; i++) {
 663                         win_t *screen = new0(win_t);
 664                         screen->x = info[i].x_org;
 665                         screen->y = info[i].y_org;
 666                         screen->w = info[i].width;
 667                         screen->h = info[i].height;
 668                         screen->sys = new0(win_sys_t);
 669                         screens = list_append(screens, screen);
 670                 }
 671         }
 672         if (screens == NULL) {
 673                 /* No xinerama support */
 674                 win_t *screen = new0(win_t);
 675                 *screen = *win;
 676                 screens = list_insert(NULL, screen);
 677         }
 678         return screens;
 679 }
 680
 681 win_t *sys_init(void)
 682 {
 683         Display *dpy;
 684         Window   xid;
 685
 686         /* Load configuration */
 687         stack      = conf_get_int("main.stack",      stack);
 688         border     = conf_get_int("main.border",     border);
 689         no_capture = conf_get_int("main.no-capture", no_capture);
 690
 691         /* Open the display */
 692         if (!(dpy = XOpenDisplay(NULL)))
 693                 error("Unable to get display");
 694         if (!(xid = DefaultRootWindow(dpy)))
 695                 error("Unable to get root window");
 696
 697         /* Setup X11 data */
 698         atoms[WM_PROTO]    = XInternAtom(dpy, "WM_PROTOCOLS",               False);
 699         atoms[WM_FOCUS]    = XInternAtom(dpy, "WM_TAKE_FOCUS",              False);
 700         atoms[WM_DELETE]   = XInternAtom(dpy, "WM_DELETE_WINDOW",           False);
 701         atoms[NET_STATE]   = XInternAtom(dpy, "_NET_WM_STATE",              False);
 702         atoms[NET_FULL]    = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN",   False);
 703         atoms[NET_STRUT]   = XInternAtom(dpy, "_NET_WM_STRUT",              False);
 704         atoms[NET_TYPE]    = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE",        False);
 705         atoms[NET_DIALOG]  = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 706
 707         colors[CLR_FOCUS]   = get_color(dpy, "#a0a0ff");
 708         colors[CLR_UNFOCUS] = get_color(dpy, "#101066");
 709         colors[CLR_URGENT]  = get_color(dpy, "#ff0000");
 710         //printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 711
 712         /* Select window management events */
 713         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 714         xerrorxlib = XSetErrorHandler(xerror);
 715
 716         return root = win_find(dpy, xid, 1);
 717 }
 718
 719 void sys_run(win_t *root)
 720 {
 721         /* Add each initial window */
 722         if (!no_capture) {
 723                 unsigned int nkids;
 724                 Window par, xid, *kids = NULL;
 725                 if (XQueryTree(root->sys->dpy, root->sys->xid,
 726                                         &par, &xid, &kids, &nkids)) {
 727                         for(int i = 0; i < nkids; i++)
 728                                 if (win_viewable(root->sys->dpy, kids[i]))
 729                                         win_find(root->sys->dpy, kids[i], 1);
 730                         XFree(kids);
 731                 }
 732         }
 733
 734         /* Main loop */
 735         running = 1;
 736         while (running)
 737         {
 738                 XEvent xe;
 739                 XNextEvent(root->sys->dpy, &xe);
 740                 process_event(xe.type, &xe, root);
 741         }
 742 }
 743
 744 void sys_exit(void)
 745 {
 746         running = 0;
 747 }
 748
 749 void sys_free(win_t *root)
 750 {
 751         XCloseDisplay(root->sys->dpy);
 752         while (screens) {
 753                 win_free(screens->data);
 754                 screens = list_remove(screens, screens, 0);
 755         }
 756         tdestroy(cache, (void(*)(void*))win_free);
 757 }