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

   1 /*
   2  * Copyright (c) 2015 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 <xcb/xcb.h>
  22 #include <xcb/xcb_event.h>
  23 #include <xcb/xcb_keysyms.h>
  24 #include <xcb/xinerama.h>
  25
  26 #include "util.h"
  27 #include "conf.h"
  28 #include "types.h"
  29 #include "sys.h"
  30 #include "wm.h"
  31
  32 /* Configuration */
  33 static int border     = 2;
  34 static int stack      = 25;
  35 static int no_capture = 0;
  36
  37 /* Internal structures */
  38 struct win_sys {
  39         xcb_window_t     xcb;    // xcb window id
  40         xcb_event_mask_t events; // currently watch events
  41         int override;            // normal vs override redirect
  42         int mapped;              // window is currently mapped
  43 };
  44
  45 /* Global data */
  46 static xcb_connection_t  *conn;
  47 static xcb_key_symbols_t *keysyms;
  48 static xcb_window_t       root;
  49 static xcb_event_mask_t   events;
  50 static list_t            *screens;
  51 static void              *cache;
  52
  53
  54 /************************
  55  * Conversion functions *
  56  ************************/
  57
  58 /* Key presses */
  59 static struct {
  60         event_t      ev;
  61         xcb_keysym_t sym;
  62 } keysym_map[] = {
  63         { EV_LEFT,     0xFF51 },
  64         { EV_RIGHT,    0xFF53 },
  65         { EV_UP,       0xFF52 },
  66         { EV_DOWN,     0xFF54 },
  67         { EV_HOME,     0xFF50 },
  68         { EV_END,      0xFF57 },
  69         { EV_PAGEUP,   0xFF55 },
  70         { EV_PAGEDOWN, 0xFF56 },
  71         { EV_F1,       0xFFBE },
  72         { EV_F2,       0xFFBF },
  73         { EV_F3,       0xFFC0 },
  74         { EV_F4,       0xFFC1 },
  75         { EV_F5,       0xFFC2 },
  76         { EV_F6,       0xFFC3 },
  77         { EV_F7,       0xFFC4 },
  78         { EV_F8,       0xFFC5 },
  79         { EV_F9,       0xFFC6 },
  80         { EV_F10,      0xFFC7 },
  81         { EV_F11,      0xFFC8 },
  82         { EV_F12,      0xFFC9 },
  83 };
  84
  85 static xcb_keycode_t *event_to_keycodes(event_t ev)
  86 {
  87         xcb_keycode_t *codes = NULL;
  88
  89         /* Get keysym */
  90         xcb_keysym_t keysym = map_get(keysym_map, ev, ev, sym, ev);
  91
  92         /* Get keycodes */
  93         if (!(codes = xcb_key_symbols_get_keycode(keysyms, keysym)))
  94                 warn("no keycode found for %d->%d", ev, keysym);
  95
  96         return codes;
  97 }
  98
  99 static event_t keycode_to_event(xcb_keycode_t code)
 100 {
 101         /* Get keysym */
 102         xcb_keysym_t keysym = xcb_key_symbols_get_keysym(keysyms, code, 0);
 103
 104         /* Get event */
 105         return map_get(keysym_map, sym,keysym, ev,keysym);
 106 }
 107
 108 /* Button presses */
 109 static event_t button_to_event(xcb_button_t btn)
 110 {
 111         return EV_MOUSE0 + btn;
 112 }
 113
 114 static xcb_button_t event_to_button(event_t ev)
 115 {
 116         return ev - EV_MOUSE0;
 117 }
 118
 119 /* Modifier masks */
 120 static xcb_mod_mask_t mod_to_mask(mod_t mod)
 121 {
 122         xcb_mod_mask_t mask = 0;
 123         if (mod.alt)   mask |= XCB_MOD_MASK_1;
 124         if (mod.ctrl)  mask |= XCB_MOD_MASK_CONTROL;
 125         if (mod.shift) mask |= XCB_MOD_MASK_SHIFT;
 126         if (mod.win)   mask |= XCB_MOD_MASK_4;
 127         return mask;
 128 }
 129
 130 static mod_t mask_to_mod(xcb_mod_mask_t mask, int up)
 131 {
 132         mod_t mod = { .up = up };
 133         if (mask & XCB_MOD_MASK_1)       mod.alt   = 1;
 134         if (mask & XCB_MOD_MASK_CONTROL) mod.ctrl  = 1;
 135         if (mask & XCB_MOD_MASK_SHIFT)   mod.shift = 1;
 136         if (mask & XCB_MOD_MASK_4)       mod.win   = 1;
 137         return mod;
 138 }
 139
 140 /* Mouse pointers */
 141 static ptr_t list_to_ptr(int16_t *list)
 142 {
 143         ptr_t ptr = {};
 144         ptr.rx = list[0]; // root_x
 145         ptr.ry = list[1]; // root_y
 146         ptr.x  = list[2]; // event_x
 147         ptr.y  = list[3]; // event_y
 148         return ptr;
 149 }
 150
 151 /********************
 152  * Window functions *
 153  ********************/
 154
 155 static int win_cmp(const void *_a, const void *_b)
 156 {
 157         const win_t *a = _a;
 158         const win_t *b = _b;
 159         if (a->sys->xcb < b->sys->xcb) return -1;
 160         if (a->sys->xcb > b->sys->xcb) return  1;
 161         return 0;
 162 }
 163
 164 static win_t *win_get(xcb_window_t xcb)
 165 {
 166         win_sys_t sys = { .xcb =  xcb };
 167         win_t     key = { .sys = &sys };
 168
 169         win_t   **win = tfind(&key, &cache, win_cmp);
 170
 171         if (!win) {
 172                 warn("no window for %u", xcb);
 173                 return NULL;
 174         }
 175
 176         return *win;
 177 }
 178
 179 /****************
 180  * XCB Wrappers *
 181  ****************/
 182
 183 static int do_query_tree(xcb_window_t win, xcb_window_t **kids)
 184 {
 185         xcb_query_tree_cookie_t cookie =
 186                 xcb_query_tree(conn, win);
 187         if (!cookie.sequence)
 188                 return warn("do_query_tree: %d - bad cookie", win);
 189
 190         xcb_query_tree_reply_t *reply =
 191                 xcb_query_tree_reply(conn, cookie, NULL);
 192         if (!reply)
 193                 return warn("do_query_tree: %d - no reply", win);
 194
 195         int nkids = xcb_query_tree_children_length(reply);
 196         *kids = xcb_query_tree_children(reply);
 197         printf("do_query_tree: %d - n=%d\n", win, nkids);
 198         return nkids;
 199 }
 200
 201 static int do_get_geometry(xcb_window_t win,
 202                 int *x, int *y, int *w, int *h)
 203 {
 204         xcb_get_geometry_cookie_t cookie =
 205                 xcb_get_geometry(conn, win);
 206         if (!cookie.sequence)
 207                 return warn("do_get_geometry: %d - bad cookie", win);
 208
 209         xcb_get_geometry_reply_t *reply =
 210                 xcb_get_geometry_reply(conn, cookie, NULL);
 211         if (!reply)
 212                 return warn("do_get_geometry: %d - no reply", win);
 213
 214         printf("do_get_geometry: %d - %dx%d @ %d,%d\n",
 215                         win, reply->width, reply->height, reply->x, reply->y);
 216         *x = reply->x;
 217         *y = reply->y;
 218         *w = reply->width;
 219         *h = reply->height;
 220         return 1;
 221 }
 222
 223 static int do_get_window_attributes(xcb_window_t win,
 224                 int *override, int *mapped)
 225 {
 226         xcb_get_window_attributes_cookie_t cookie =
 227                 xcb_get_window_attributes(conn, win);
 228         if (!cookie.sequence)
 229                 return warn("do_get_window_attributes: %d - bad cookie", win);
 230
 231         xcb_get_window_attributes_reply_t *reply =
 232                 xcb_get_window_attributes_reply(conn, cookie, NULL);
 233         if (!reply)
 234                 return warn("do_get_window_attributes: %d - no reply ", win);
 235
 236         printf("do_get_window_attributes: %d - %d\n",
 237                         win, reply->override_redirect);
 238         *override = reply->override_redirect;
 239         *mapped   = reply->map_state != XCB_MAP_STATE_UNMAPPED;
 240         return 1;
 241 }
 242
 243 static int do_xinerama_check(void)
 244 {
 245         const xcb_query_extension_reply_t *data =
 246                 xcb_get_extension_data(conn, &xcb_xinerama_id);
 247         if (!data || !data->present)
 248                 return warn("do_xinerama_check: no ext");
 249
 250         xcb_xinerama_is_active_cookie_t cookie =
 251                 xcb_xinerama_is_active(conn);
 252         if (!cookie.sequence)
 253                 return warn("do_xinerama_check: no cookie");
 254
 255         xcb_xinerama_is_active_reply_t *reply =
 256                 xcb_xinerama_is_active_reply(conn, cookie, NULL);
 257         if (!reply)
 258                 warn("do_xinerama_check: no reply");
 259
 260         printf("do_xinerama_check: %d\n", reply->state);
 261         return reply && reply->state;
 262 }
 263
 264 static int do_query_screens(xcb_xinerama_screen_info_t **info)
 265 {
 266         xcb_xinerama_query_screens_cookie_t cookie =
 267                 xcb_xinerama_query_screens(conn);
 268         if (!cookie.sequence)
 269                 return warn("do_query_screens: bad cookie");
 270
 271         xcb_xinerama_query_screens_reply_t *reply =
 272                 xcb_xinerama_query_screens_reply(conn, cookie, NULL);
 273         if (!reply)
 274                 return warn("do_query_screens: no reply");
 275
 276         int ninfo = xcb_xinerama_query_screens_screen_info_length(reply);
 277         *info = xcb_xinerama_query_screens_screen_info(reply);
 278         printf("do_query_screens: %d screens\n", ninfo);
 279         return ninfo;
 280 }
 281
 282 /**********************
 283  * X11 Event Handlers *
 284  **********************/
 285
 286 /* Specific events */
 287 static void on_key_event(xcb_key_press_event_t *event, int up)
 288 {
 289         xcb_window_t xcb = event->event == root ?
 290                 event->child : event->event;
 291         win_t  *win = win_get(xcb);
 292         event_t ev  = keycode_to_event(event->detail);
 293         mod_t   mod = mask_to_mod(event->state, up);
 294         ptr_t   ptr = list_to_ptr(&event->root_x);
 295         printf("on_key_event:         xcb=%u -> win=%p\n", xcb, win);
 296         wm_handle_event(win, ev, mod, ptr);
 297 }
 298
 299 static void on_button_event(xcb_button_press_event_t *event, int up)
 300 {
 301         xcb_window_t xcb = event->event == root ?
 302                 event->child : event->event;
 303         win_t  *win = win_get(xcb);
 304         event_t ev  = button_to_event(event->detail);
 305         mod_t   mod = mask_to_mod(event->state, up);
 306         ptr_t   ptr = list_to_ptr(&event->root_x);
 307         printf("on_button_event:      xcb=%u -> win=%p\n", xcb, win);
 308
 309         if (!wm_handle_event(win, ev, mod, ptr))
 310                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 311         else if (!up)
 312                 xcb_grab_pointer(conn, 1, xcb,
 313                                 XCB_EVENT_MASK_POINTER_MOTION |
 314                                 XCB_EVENT_MASK_BUTTON_RELEASE,
 315                                 XCB_GRAB_MODE_ASYNC,
 316                                 XCB_GRAB_MODE_ASYNC,
 317                                 0, 0, XCB_CURRENT_TIME);
 318         else
 319                 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 320
 321 }
 322
 323 static void on_motion_notify(xcb_motion_notify_event_t *event)
 324 {
 325         xcb_window_t xcb = event->event == root ?
 326                 event->child : event->event;
 327         win_t *win = win_get(xcb);
 328         ptr_t  ptr = list_to_ptr(&event->root_x);
 329         printf("on_motion_notify:     xcb=%u -> win=%p - %d,%d / %d.%d\n", xcb, win,
 330                         ptr.x, ptr.y, ptr.rx, ptr.ry);
 331         wm_handle_ptr(win, ptr);
 332 }
 333
 334 static void on_create_notify(xcb_create_notify_event_t *event)
 335 {
 336         win_t     *win = new0(win_t);
 337         win_sys_t *sys = new0(win_sys_t);
 338
 339         printf("on_create_notify:     xcb=%u -> win=%p\n",
 340                         event->window, win);
 341
 342         win->x        = event->x;
 343         win->y        = event->y;
 344         win->w        = event->width;
 345         win->h        = event->height;
 346         win->sys      = sys;
 347
 348         sys->xcb      = event->window;
 349         sys->override = event->override_redirect;
 350
 351         tsearch(win, &cache, win_cmp);
 352 }
 353
 354 static void on_destroy_notify(win_t *win, xcb_destroy_notify_event_t *event)
 355 {
 356         printf("on_destroy_notify:    xcb=%u -> win=%p\n",
 357                         event->window, win);
 358
 359         tdelete(win, &cache, win_cmp);
 360
 361         free(win->sys);
 362         free(win);
 363 }
 364
 365 static void on_map_request(win_t *win, xcb_map_request_event_t *event)
 366 {
 367         printf("on_map_request:       xcb=%u -> win=%p\n",
 368                         event->window, win);
 369
 370         if (!win->sys->override && !win->sys->mapped)
 371                 wm_insert(win);
 372         win->sys->mapped = 1;
 373
 374         xcb_map_window(conn, win->sys->xcb);
 375         sys_move(win, win->x, win->y, win->w, win->h);
 376 }
 377
 378 static void on_configure_request(win_t *win, xcb_configure_request_event_t *event)
 379 {
 380         printf("on_configure_request: xcb=%u -> win=%p -- %dx%d @ %d,%d\n",
 381                         event->window, win,
 382                         event->width, event->height,
 383                         event->x, event->y);
 384
 385         win->x = event->x;
 386         win->y = event->y;
 387         win->w = event->width;
 388         win->h = event->height;
 389
 390         xcb_configure_notify_event_t resp = {
 391                 .response_type = XCB_CONFIGURE_NOTIFY,
 392                 .event         = win->sys->xcb,
 393                 .window        = win->sys->xcb,
 394                 .x             = win->x,
 395                 .y             = win->y,
 396                 .width         = win->w,
 397                 .height        = win->h,
 398                 .border_width  = border,
 399         };
 400
 401         xcb_send_event(conn, 0, win->sys->xcb,
 402                         XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 403                         (const char *)&resp);
 404 }
 405
 406 /* Generic Event */
 407 static void on_event(xcb_generic_event_t *event)
 408 {
 409         win_t   *win = NULL;
 410
 411         int type = XCB_EVENT_RESPONSE_TYPE(event);
 412         int sent = XCB_EVENT_SENT(event);
 413         const char *name = NULL;
 414
 415         switch (type) {
 416                 /* Input handling */
 417                 case XCB_KEY_PRESS:
 418                         on_key_event((xcb_key_press_event_t *)event, 0);
 419                         break;
 420                 case XCB_KEY_RELEASE:
 421                         on_key_event((xcb_key_release_event_t *)event, 1);
 422                         break;
 423                 case XCB_BUTTON_PRESS:
 424                         on_button_event((xcb_button_press_event_t *)event, 0);
 425                         break;
 426                 case XCB_BUTTON_RELEASE:
 427                         on_button_event((xcb_button_release_event_t *)event, 1);
 428                         break;
 429                 case XCB_MOTION_NOTIFY:
 430                         on_motion_notify((xcb_motion_notify_event_t *)event);
 431                         break;
 432
 433                 /* Window management */
 434                 case XCB_CREATE_NOTIFY:
 435                         on_create_notify((xcb_create_notify_event_t *)event);
 436                         break;
 437                 case XCB_DESTROY_NOTIFY:
 438                         if ((win = win_get(((xcb_destroy_notify_event_t *)event)->window)))
 439                                 on_destroy_notify(win, (xcb_destroy_notify_event_t *)event);
 440                         break;
 441                 case XCB_MAP_REQUEST:
 442                         if ((win = win_get(((xcb_map_request_event_t *)event)->window)))
 443                                 on_map_request(win, (xcb_map_request_event_t *)event);
 444                         break;
 445                 case XCB_CONFIGURE_REQUEST:
 446                         if ((win = win_get(((xcb_configure_request_event_t *)event)->window)))
 447                                 on_configure_request(win, (xcb_configure_request_event_t *)event);
 448                         break;
 449
 450                 /* Unknown events */
 451                 default:
 452                         name = xcb_event_get_label(type);
 453                         printf("on_event: %d:%02X -> %s\n",
 454                                 !!sent, type, name?:"unknown_event");
 455                         break;
 456         }
 457 }
 458
 459 /********************
 460  * System functions *
 461  ********************/
 462
 463 void sys_move(win_t *win, int x, int y, int w, int h)
 464 {
 465         printf("sys_move:  %p - %dx%d @ %d,%d\n",
 466                         win, w, h, x, y);
 467
 468         win->x = x;
 469         win->y = y;
 470         win->w = w;
 471         win->h = h;
 472
 473         uint16_t mask   = XCB_CONFIG_WINDOW_X
 474                         | XCB_CONFIG_WINDOW_Y
 475                         | XCB_CONFIG_WINDOW_WIDTH
 476                         | XCB_CONFIG_WINDOW_HEIGHT;
 477         uint32_t list[] = {x, y, w, h};
 478
 479         xcb_configure_window(conn, win->sys->xcb, mask, list);
 480 }
 481
 482 void sys_raise(win_t *win)
 483 {
 484         printf("sys_raise: %p\n", win);
 485         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, win->sys->xcb);
 486 }
 487
 488 void sys_focus(win_t *win)
 489 {
 490         printf("sys_focus: %p\n", win);
 491         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT,
 492                         win->sys->xcb, XCB_CURRENT_TIME);
 493 }
 494
 495 void sys_show(win_t *win, state_t state)
 496 {
 497         printf("sys_show:  %p - %d\n", win, state);
 498 }
 499
 500 void sys_watch(win_t *win, event_t ev, mod_t mod)
 501 {
 502         printf("sys_watch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 503         xcb_window_t      xcb  = win ? win->sys->xcb     : root;
 504         xcb_event_mask_t *mask = win ? &win->sys->events : &events;
 505         xcb_mod_mask_t    mods = 0;
 506         xcb_button_t      btn  = 0;
 507         xcb_keycode_t    *code = 0;
 508
 509         switch (ev) {
 510                 case EV_ENTER:
 511                         *mask |= XCB_EVENT_MASK_ENTER_WINDOW;
 512                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 513                         break;
 514
 515                 case EV_LEAVE:
 516                         *mask |= XCB_EVENT_MASK_LEAVE_WINDOW;
 517                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 518                         break;
 519
 520                 case EV_FOCUS:
 521                 case EV_UNFOCUS:
 522                         *mask |= XCB_EVENT_MASK_FOCUS_CHANGE;
 523                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 524                         break;
 525
 526                 case EV_MOUSE0...EV_MOUSE7:
 527                         btn    = event_to_button(ev);
 528                         mods   = mod_to_mask(mod);
 529                         *mask |= mod.up ? XCB_EVENT_MASK_BUTTON_RELEASE
 530                                         : XCB_EVENT_MASK_BUTTON_PRESS;
 531                         xcb_grab_button(conn, 0, xcb, *mask,
 532                                         XCB_GRAB_MODE_ASYNC,
 533                                         XCB_GRAB_MODE_ASYNC,
 534                                         0, 0, btn, mods);
 535                         break;
 536
 537                 default:
 538                         code = event_to_keycodes(ev);
 539                         mods = mod_to_mask(mod);
 540                         for (int i = 0; code && code[i] != XCB_NO_SYMBOL; i++)
 541                                 xcb_grab_key(conn, 1, xcb, mods, code[i],
 542                                                 XCB_GRAB_MODE_ASYNC,
 543                                                 XCB_GRAB_MODE_ASYNC);
 544
 545                         break;
 546         }
 547 }
 548
 549 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 550 {
 551         printf("sys_unwatch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 552 }
 553
 554 list_t *sys_info(void)
 555 {
 556         printf("sys_info\n");
 557
 558         if (screens == NULL && do_xinerama_check()) {
 559                 /* Add Xinerama screens */
 560                 xcb_xinerama_screen_info_t *info = NULL;
 561                 int ninfo = do_query_screens(&info);
 562                 for (int i = 0; i < ninfo; i++) {
 563                         win_t *screen = new0(win_t);
 564
 565                         screen->x = info[i].x_org;
 566                         screen->y = info[i].y_org;
 567                         screen->w = info[i].width;
 568                         screen->h = info[i].height;
 569
 570                         screens = list_insert(NULL, screen);
 571
 572                         printf("sys_info: xinerama screen - %dx%d @ %d,%d\n",
 573                                         screen->w, screen->h,
 574                                         screen->x, screen->y);
 575                 }
 576         }
 577
 578         if (screens == NULL) {
 579                 /* No xinerama support */
 580                 const xcb_setup_t *setup = xcb_get_setup(conn);
 581                 xcb_screen_t      *geom  = xcb_setup_roots_iterator(setup).data;
 582
 583                 win_t *screen = new0(win_t);
 584
 585                 screen->w = geom->width_in_pixels;
 586                 screen->h = geom->height_in_pixels;
 587
 588                 screens = list_insert(NULL, screen);
 589
 590                 printf("sys_info: root screen - %dx%d\n",
 591                                 screen->w, screen->h);
 592         }
 593
 594         return screens;
 595 }
 596
 597 void sys_init(void)
 598 {
 599         printf("sys_init\n");
 600
 601         /* Load configuration */
 602         stack      = conf_get_int("main.stack",      stack);
 603         border     = conf_get_int("main.border",     border);
 604         no_capture = conf_get_int("main.no-capture", no_capture);
 605
 606         /* Connect to display */
 607         if (!(conn = xcb_connect(NULL, NULL)))
 608                 error("xcb connect failed");
 609         if (xcb_connection_has_error(conn))
 610                 error("xcb connection has errors");
 611
 612         /* Allocate key symbols */
 613         if (!(keysyms = xcb_key_symbols_alloc(conn)))
 614                 error("cannot allocate key symbols");
 615
 616         /* Get root window */
 617         const xcb_setup_t     *setup = xcb_get_setup(conn);
 618         xcb_screen_iterator_t  iter  = xcb_setup_roots_iterator(setup);
 619         root = iter.data->root;
 620
 621         /* Request substructure redirect */
 622         xcb_void_cookie_t cookie;
 623         xcb_generic_error_t *err;
 624         events = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
 625                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY;
 626         cookie = xcb_change_window_attributes_checked(conn, root,
 627                         XCB_CW_EVENT_MASK, &events);
 628         if ((err = xcb_request_check(conn, cookie)))
 629                 error("another window manager is already running");
 630 }
 631
 632 void sys_run(void)
 633 {
 634         printf("sys_run\n");
 635
 636         /* Add each initial window */
 637         if (!no_capture) {
 638                 xcb_window_t *kids = NULL;
 639                 int nkids = do_query_tree(root, &kids);
 640                 for(int i = 0; i < nkids; i++) {
 641                         win_t *win = new0(win_t);
 642                         win->sys = new0(win_sys_t);
 643                         win->sys->xcb = kids[i];
 644                         do_get_geometry(kids[i], &win->x, &win->y, &win->w, &win->h);
 645                         do_get_window_attributes(kids[i],
 646                                 &win->sys->override, &win->sys->mapped);
 647                         tsearch(win, &cache, win_cmp);
 648                         if (!win->sys->override && win->sys->mapped)
 649                                 wm_insert(win);
 650                 }
 651                 xcb_flush(conn);
 652         }
 653
 654         /* Main loop */
 655         while (1)
 656         {
 657                 int status;
 658                 xcb_generic_event_t *event;
 659                 if (!(event = xcb_wait_for_event(conn)))
 660                         break;
 661                 on_event(event);
 662                 free(event);
 663                 if (!(status = xcb_flush(conn)))
 664                         break;
 665         }
 666 }
 667
 668 void sys_exit(void)
 669 {
 670         printf("sys_exit\n");
 671         if (conn)
 672                 xcb_disconnect(conn);
 673         conn = NULL;
 674 }
 675
 676 void sys_free(void)
 677 {
 678         printf("sys_free\n");
 679         if (conn)
 680                 xcb_disconnect(conn);
 681         conn = NULL;
 682 }