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 #include <string.h>
  21
  22 #include <xcb/xcb.h>
  23 #include <xcb/xcb_event.h>
  24 #include <xcb/xcb_keysyms.h>
  25 #include <xcb/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 stack      = 25;
  36 static int no_capture = 0;
  37
  38 /* Internal structures */
  39 struct win_sys {
  40         xcb_window_t     xcb;    // xcb window id
  41         xcb_event_mask_t events; // currently watch events
  42         int override;            // normal vs override redirect
  43         int mapped;              // window is currently mapped
  44 };
  45
  46 typedef enum {
  47         CLR_FOCUS,
  48         CLR_UNFOCUS,
  49         CLR_URGENT,
  50         NCOLORS
  51 } color_t;
  52
  53 /* Global data */
  54 static xcb_connection_t  *conn;
  55 static xcb_key_symbols_t *keysyms;
  56 static xcb_colormap_t     colormap;
  57 static xcb_window_t       root;
  58 static xcb_window_t       last;
  59 static xcb_event_mask_t   events;
  60 static list_t            *screens;
  61 static void              *cache;
  62 static xcb_pixmap_t       colors[NCOLORS];
  63
  64 /************************
  65  * Conversion functions *
  66  ************************/
  67
  68 /* Key presses */
  69 static struct {
  70         event_t      ev;
  71         xcb_keysym_t sym;
  72 } keysym_map[] = {
  73         { EV_LEFT,     0xFF51 },
  74         { EV_RIGHT,    0xFF53 },
  75         { EV_UP,       0xFF52 },
  76         { EV_DOWN,     0xFF54 },
  77         { EV_HOME,     0xFF50 },
  78         { EV_END,      0xFF57 },
  79         { EV_PAGEUP,   0xFF55 },
  80         { EV_PAGEDOWN, 0xFF56 },
  81         { EV_F1,       0xFFBE },
  82         { EV_F2,       0xFFBF },
  83         { EV_F3,       0xFFC0 },
  84         { EV_F4,       0xFFC1 },
  85         { EV_F5,       0xFFC2 },
  86         { EV_F6,       0xFFC3 },
  87         { EV_F7,       0xFFC4 },
  88         { EV_F8,       0xFFC5 },
  89         { EV_F9,       0xFFC6 },
  90         { EV_F10,      0xFFC7 },
  91         { EV_F11,      0xFFC8 },
  92         { EV_F12,      0xFFC9 },
  93 };
  94
  95 static xcb_keycode_t *event_to_keycodes(event_t ev)
  96 {
  97         xcb_keycode_t *codes = NULL;
  98
  99         /* Get keysym */
 100         xcb_keysym_t keysym = map_get(keysym_map, ev, ev, sym, ev);
 101
 102         /* Get keycodes */
 103         if (!(codes = xcb_key_symbols_get_keycode(keysyms, keysym)))
 104                 warn("no keycode found for %d->%d", ev, keysym);
 105
 106         return codes;
 107 }
 108
 109 static event_t keycode_to_event(xcb_keycode_t code)
 110 {
 111         /* Get keysym */
 112         xcb_keysym_t keysym = xcb_key_symbols_get_keysym(keysyms, code, 0);
 113
 114         /* Get event */
 115         return map_get(keysym_map, sym,keysym, ev,keysym);
 116 }
 117
 118 /* Button presses */
 119 static event_t button_to_event(xcb_button_t btn)
 120 {
 121         return EV_MOUSE0 + btn;
 122 }
 123
 124 static xcb_button_t event_to_button(event_t ev)
 125 {
 126         return ev - EV_MOUSE0;
 127 }
 128
 129 /* Modifier masks */
 130 static xcb_mod_mask_t mod_to_mask(mod_t mod)
 131 {
 132         xcb_mod_mask_t mask = 0;
 133         if (mod.alt)   mask |= XCB_MOD_MASK_1;
 134         if (mod.ctrl)  mask |= XCB_MOD_MASK_CONTROL;
 135         if (mod.shift) mask |= XCB_MOD_MASK_SHIFT;
 136         if (mod.win)   mask |= XCB_MOD_MASK_4;
 137         return mask;
 138 }
 139
 140 static mod_t mask_to_mod(xcb_mod_mask_t mask, int up)
 141 {
 142         mod_t mod = { .up = up };
 143         if (mask & XCB_MOD_MASK_1)       mod.alt   = 1;
 144         if (mask & XCB_MOD_MASK_CONTROL) mod.ctrl  = 1;
 145         if (mask & XCB_MOD_MASK_SHIFT)   mod.shift = 1;
 146         if (mask & XCB_MOD_MASK_4)       mod.win   = 1;
 147         return mod;
 148 }
 149
 150 /* Mouse pointers */
 151 static ptr_t list_to_ptr(int16_t *list)
 152 {
 153         ptr_t ptr = {};
 154         ptr.rx = list[0]; // root_x
 155         ptr.ry = list[1]; // root_y
 156         ptr.x  = list[2]; // event_x
 157         ptr.y  = list[3]; // event_y
 158         return ptr;
 159 }
 160
 161 /********************
 162  * Window functions *
 163  ********************/
 164
 165 static int win_cmp(const void *_a, const void *_b)
 166 {
 167         const win_t *a = _a;
 168         const win_t *b = _b;
 169         if (a->sys->xcb < b->sys->xcb) return -1;
 170         if (a->sys->xcb > b->sys->xcb) return  1;
 171         return 0;
 172 }
 173
 174 static win_t *win_get(xcb_window_t xcb)
 175 {
 176         win_sys_t sys = { .xcb =  xcb };
 177         win_t     key = { .sys = &sys };
 178
 179         win_t   **win = tfind(&key, &cache, win_cmp);
 180
 181         if (!win) {
 182                 warn("no window for %u", xcb);
 183                 return NULL;
 184         }
 185
 186         return *win;
 187 }
 188
 189 /****************
 190  * XCB Wrappers *
 191  ****************/
 192
 193 static int do_query_tree(xcb_window_t win, xcb_window_t **kids)
 194 {
 195         xcb_query_tree_cookie_t cookie =
 196                 xcb_query_tree(conn, win);
 197         if (!cookie.sequence)
 198                 return warn("do_query_tree: %d - bad cookie", win);
 199
 200         xcb_query_tree_reply_t *reply =
 201                 xcb_query_tree_reply(conn, cookie, NULL);
 202         if (!reply)
 203                 return warn("do_query_tree: %d - no reply", win);
 204
 205         int nkids = xcb_query_tree_children_length(reply);
 206         *kids = xcb_query_tree_children(reply);
 207         printf("do_query_tree: %d - n=%d\n", win, nkids);
 208         return nkids;
 209 }
 210
 211 static int do_get_geometry(xcb_window_t win,
 212                 int *x, int *y, int *w, int *h)
 213 {
 214         xcb_get_geometry_cookie_t cookie =
 215                 xcb_get_geometry(conn, win);
 216         if (!cookie.sequence)
 217                 return warn("do_get_geometry: %d - bad cookie", win);
 218
 219         xcb_get_geometry_reply_t *reply =
 220                 xcb_get_geometry_reply(conn, cookie, NULL);
 221         if (!reply)
 222                 return warn("do_get_geometry: %d - no reply", win);
 223
 224         printf("do_get_geometry: %d - %dx%d @ %d,%d\n",
 225                         win, reply->width, reply->height, reply->x, reply->y);
 226         *x = reply->x;
 227         *y = reply->y;
 228         *w = reply->width;
 229         *h = reply->height;
 230         return 1;
 231 }
 232
 233 static int do_get_window_attributes(xcb_window_t win,
 234                 int *override, int *mapped)
 235 {
 236         xcb_get_window_attributes_cookie_t cookie =
 237                 xcb_get_window_attributes(conn, win);
 238         if (!cookie.sequence)
 239                 return warn("do_get_window_attributes: %d - bad cookie", win);
 240
 241         xcb_get_window_attributes_reply_t *reply =
 242                 xcb_get_window_attributes_reply(conn, cookie, NULL);
 243         if (!reply)
 244                 return warn("do_get_window_attributes: %d - no reply ", win);
 245
 246         printf("do_get_window_attributes: %d - %d\n",
 247                         win, reply->override_redirect);
 248         *override = reply->override_redirect;
 249         *mapped   = reply->map_state != XCB_MAP_STATE_UNMAPPED;
 250         return 1;
 251 }
 252
 253 static int do_xinerama_check(void)
 254 {
 255         const xcb_query_extension_reply_t *data =
 256                 xcb_get_extension_data(conn, &xcb_xinerama_id);
 257         if (!data || !data->present)
 258                 return warn("do_xinerama_check: no ext");
 259
 260         xcb_xinerama_is_active_cookie_t cookie =
 261                 xcb_xinerama_is_active(conn);
 262         if (!cookie.sequence)
 263                 return warn("do_xinerama_check: no cookie");
 264
 265         xcb_xinerama_is_active_reply_t *reply =
 266                 xcb_xinerama_is_active_reply(conn, cookie, NULL);
 267         if (!reply)
 268                 warn("do_xinerama_check: no reply");
 269
 270         printf("do_xinerama_check: %d\n", reply->state);
 271         return reply && reply->state;
 272 }
 273
 274 static int do_query_screens(xcb_xinerama_screen_info_t **info)
 275 {
 276         xcb_xinerama_query_screens_cookie_t cookie =
 277                 xcb_xinerama_query_screens(conn);
 278         if (!cookie.sequence)
 279                 return warn("do_query_screens: bad cookie");
 280
 281         xcb_xinerama_query_screens_reply_t *reply =
 282                 xcb_xinerama_query_screens_reply(conn, cookie, NULL);
 283         if (!reply)
 284                 return warn("do_query_screens: no reply");
 285
 286         int ninfo = xcb_xinerama_query_screens_screen_info_length(reply);
 287         *info = xcb_xinerama_query_screens_screen_info(reply);
 288         printf("do_query_screens: %d screens\n", ninfo);
 289         return ninfo;
 290 }
 291
 292 static xcb_pixmap_t do_alloc_color(uint32_t rgb)
 293 {
 294         uint16_t r = (rgb & 0xFF0000) >> 8;
 295         uint16_t g = (rgb & 0x00FF00);
 296         uint16_t b = (rgb & 0x0000FF) << 8;
 297         xcb_alloc_color_cookie_t cookie =
 298                 xcb_alloc_color(conn, colormap, r, g, b);
 299         if (!cookie.sequence)
 300                 return warn("do_alloc_color: bad cookie");
 301
 302         xcb_alloc_color_reply_t *reply =
 303                 xcb_alloc_color_reply(conn, cookie, NULL);
 304         if (!reply)
 305                 return warn("do_alloc_color: no reply");
 306
 307         printf("do_alloc_color: %06x -> %06x\n", rgb, reply->pixel);
 308         return reply->pixel;
 309 }
 310
 311 /**********************
 312  * X11 Event Handlers *
 313  **********************/
 314
 315 /* Specific events */
 316 static void on_key_event(xcb_key_press_event_t *event, int up)
 317 {
 318         xcb_window_t xcb = event->event == root ?
 319                 event->child : event->event;
 320         win_t  *win = win_get(xcb);
 321         event_t ev  = keycode_to_event(event->detail);
 322         mod_t   mod = mask_to_mod(event->state, up);
 323         ptr_t   ptr = list_to_ptr(&event->root_x);
 324         printf("on_key_event:         xcb=%u -> win=%p\n", xcb, win);
 325         wm_handle_event(win, ev, mod, ptr);
 326 }
 327
 328 static void on_button_event(xcb_button_press_event_t *event, int up)
 329 {
 330         xcb_window_t xcb = event->event == root ?
 331                 event->child : event->event;
 332         win_t  *win = win_get(xcb);
 333         event_t ev  = button_to_event(event->detail);
 334         mod_t   mod = mask_to_mod(event->state, up);
 335         ptr_t   ptr = list_to_ptr(&event->root_x);
 336         printf("on_button_event:      xcb=%u -> win=%p\n", xcb, win);
 337
 338         if (!wm_handle_event(win, ev, mod, ptr))
 339                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
 340         else if (!up)
 341                 xcb_grab_pointer(conn, 1, xcb,
 342                                 XCB_EVENT_MASK_POINTER_MOTION |
 343                                 XCB_EVENT_MASK_BUTTON_RELEASE,
 344                                 XCB_GRAB_MODE_ASYNC,
 345                                 XCB_GRAB_MODE_ASYNC,
 346                                 0, 0, XCB_CURRENT_TIME);
 347         else
 348                 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 349
 350 }
 351
 352 static void on_motion_notify(xcb_motion_notify_event_t *event)
 353 {
 354         xcb_window_t xcb = event->event == root ?
 355                 event->child : event->event;
 356         win_t *win = win_get(xcb);
 357         ptr_t  ptr = list_to_ptr(&event->root_x);
 358         printf("on_motion_notify:     xcb=%u -> win=%p - %d,%d / %d.%d\n", xcb, win,
 359                         ptr.x, ptr.y, ptr.rx, ptr.ry);
 360         wm_handle_ptr(win, ptr);
 361 }
 362
 363 static void on_create_notify(xcb_create_notify_event_t *event)
 364 {
 365         win_t     *win = new0(win_t);
 366         win_sys_t *sys = new0(win_sys_t);
 367
 368         printf("on_create_notify:     xcb=%u -> win=%p\n",
 369                         event->window, win);
 370
 371         win->x        = event->x;
 372         win->y        = event->y;
 373         win->w        = event->width;
 374         win->h        = event->height;
 375         win->sys      = sys;
 376
 377         sys->xcb      = event->window;
 378         sys->override = event->override_redirect;
 379
 380         tsearch(win, &cache, win_cmp);
 381 }
 382
 383 static void on_destroy_notify(win_t *win, xcb_destroy_notify_event_t *event)
 384 {
 385         printf("on_destroy_notify:    xcb=%u -> win=%p\n",
 386                         event->window, win);
 387
 388         tdelete(win, &cache, win_cmp);
 389
 390         if (win->sys->xcb == last)
 391                 last = 0;
 392
 393         free(win->sys);
 394         free(win);
 395 }
 396
 397 static void on_map_request(win_t *win, xcb_map_request_event_t *event)
 398 {
 399         printf("on_map_request:       xcb=%u -> win=%p\n",
 400                         event->window, win);
 401
 402         if (!win->sys->override && !win->sys->mapped)
 403                 wm_insert(win);
 404         win->sys->mapped = 1;
 405
 406         xcb_map_window(conn, win->sys->xcb);
 407         sys_move(win, win->x, win->y, win->w, win->h);
 408 }
 409
 410 static void on_configure_request(win_t *win, xcb_configure_request_event_t *event)
 411 {
 412         printf("on_configure_request: xcb=%u -> win=%p -- %dx%d @ %d,%d\n",
 413                         event->window, win,
 414                         event->width, event->height,
 415                         event->x, event->y);
 416
 417         win->x = event->x;
 418         win->y = event->y;
 419         win->w = event->width;
 420         win->h = event->height;
 421
 422         xcb_configure_notify_event_t resp = {
 423                 .response_type = XCB_CONFIGURE_NOTIFY,
 424                 .event         = win->sys->xcb,
 425                 .window        = win->sys->xcb,
 426                 .x             = win->x,
 427                 .y             = win->y,
 428                 .width         = win->w,
 429                 .height        = win->h,
 430                 .border_width  = border,
 431         };
 432
 433         xcb_send_event(conn, 0, win->sys->xcb,
 434                         XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 435                         (const char *)&resp);
 436 }
 437
 438 /* Generic Event */
 439 static void on_event(xcb_generic_event_t *event)
 440 {
 441         win_t   *win = NULL;
 442
 443         int type = XCB_EVENT_RESPONSE_TYPE(event);
 444         int sent = XCB_EVENT_SENT(event);
 445         const char *name = NULL;
 446
 447         switch (type) {
 448                 /* Input handling */
 449                 case XCB_KEY_PRESS:
 450                         on_key_event((xcb_key_press_event_t *)event, 0);
 451                         break;
 452                 case XCB_KEY_RELEASE:
 453                         on_key_event((xcb_key_release_event_t *)event, 1);
 454                         break;
 455                 case XCB_BUTTON_PRESS:
 456                         on_button_event((xcb_button_press_event_t *)event, 0);
 457                         break;
 458                 case XCB_BUTTON_RELEASE:
 459                         on_button_event((xcb_button_release_event_t *)event, 1);
 460                         break;
 461                 case XCB_MOTION_NOTIFY:
 462                         on_motion_notify((xcb_motion_notify_event_t *)event);
 463                         break;
 464
 465                 /* Window management */
 466                 case XCB_CREATE_NOTIFY:
 467                         on_create_notify((xcb_create_notify_event_t *)event);
 468                         break;
 469                 case XCB_DESTROY_NOTIFY:
 470                         if ((win = win_get(((xcb_destroy_notify_event_t *)event)->window)))
 471                                 on_destroy_notify(win, (xcb_destroy_notify_event_t *)event);
 472                         break;
 473                 case XCB_MAP_REQUEST:
 474                         if ((win = win_get(((xcb_map_request_event_t *)event)->window)))
 475                                 on_map_request(win, (xcb_map_request_event_t *)event);
 476                         break;
 477                 case XCB_CONFIGURE_REQUEST:
 478                         if ((win = win_get(((xcb_configure_request_event_t *)event)->window)))
 479                                 on_configure_request(win, (xcb_configure_request_event_t *)event);
 480                         break;
 481
 482                 /* Unknown events */
 483                 default:
 484                         name = xcb_event_get_label(type);
 485                         printf("on_event: %d:%02X -> %s\n",
 486                                 !!sent, type, name?:"unknown_event");
 487                         break;
 488         }
 489 }
 490
 491 /********************
 492  * System functions *
 493  ********************/
 494
 495 void sys_move(win_t *win, int x, int y, int w, int h)
 496 {
 497         printf("sys_move:  %p - %dx%d @ %d,%d\n",
 498                         win, w, h, x, y);
 499
 500         int b = 2*border;
 501
 502         win->x = x;
 503         win->y = y;
 504         win->w = MAX(w,1+b);
 505         win->h = MAX(h,1+b);
 506         w      = MAX(w-b,1);
 507         h      = MAX(h-b,1);
 508
 509         uint16_t mask   = XCB_CONFIG_WINDOW_X
 510                         | XCB_CONFIG_WINDOW_Y
 511                         | XCB_CONFIG_WINDOW_WIDTH
 512                         | XCB_CONFIG_WINDOW_HEIGHT
 513                         | XCB_CONFIG_WINDOW_BORDER_WIDTH;
 514         uint32_t list[] = {x, y, w, h, border};
 515
 516         xcb_configure_window(conn, win->sys->xcb, mask, list);
 517 }
 518
 519 void sys_raise(win_t *win)
 520 {
 521         printf("sys_raise: %p\n", win);
 522         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, win->sys->xcb);
 523 }
 524
 525 void sys_focus(win_t *win)
 526 {
 527         printf("sys_focus: %p\n", win);
 528         xcb_window_t xcb = win ? win->sys->xcb : root;
 529
 530         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT,
 531                         xcb, XCB_CURRENT_TIME);
 532
 533         if (last)
 534                 xcb_change_window_attributes(conn, last, XCB_CW_BORDER_PIXEL, &colors[CLR_UNFOCUS]);
 535         xcb_change_window_attributes(conn, xcb, XCB_CW_BORDER_PIXEL, &colors[CLR_FOCUS]);
 536         last = xcb;
 537 }
 538
 539 void sys_show(win_t *win, state_t state)
 540 {
 541         printf("sys_show:  %p - %d\n", win, state);
 542 }
 543
 544 void sys_watch(win_t *win, event_t ev, mod_t mod)
 545 {
 546         printf("sys_watch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 547         xcb_window_t      xcb  = win ? win->sys->xcb     : root;
 548         xcb_event_mask_t *mask = win ? &win->sys->events : &events;
 549         xcb_mod_mask_t    mods = 0;
 550         xcb_button_t      btn  = 0;
 551         xcb_keycode_t    *code = 0;
 552
 553         switch (ev) {
 554                 case EV_ENTER:
 555                         *mask |= XCB_EVENT_MASK_ENTER_WINDOW;
 556                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 557                         break;
 558
 559                 case EV_LEAVE:
 560                         *mask |= XCB_EVENT_MASK_LEAVE_WINDOW;
 561                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 562                         break;
 563
 564                 case EV_FOCUS:
 565                 case EV_UNFOCUS:
 566                         *mask |= XCB_EVENT_MASK_FOCUS_CHANGE;
 567                         xcb_change_window_attributes(conn, xcb, XCB_CW_EVENT_MASK, mask);
 568                         break;
 569
 570                 case EV_MOUSE0...EV_MOUSE7:
 571                         btn    = event_to_button(ev);
 572                         mods   = mod_to_mask(mod);
 573                         *mask |= mod.up ? XCB_EVENT_MASK_BUTTON_RELEASE
 574                                         : XCB_EVENT_MASK_BUTTON_PRESS;
 575                         xcb_grab_button(conn, 0, xcb, *mask,
 576                                         XCB_GRAB_MODE_ASYNC,
 577                                         XCB_GRAB_MODE_ASYNC,
 578                                         0, 0, btn, mods);
 579                         break;
 580
 581                 default:
 582                         code = event_to_keycodes(ev);
 583                         mods = mod_to_mask(mod);
 584                         for (int i = 0; code && code[i] != XCB_NO_SYMBOL; i++)
 585                                 xcb_grab_key(conn, 1, xcb, mods, code[i],
 586                                                 XCB_GRAB_MODE_ASYNC,
 587                                                 XCB_GRAB_MODE_ASYNC);
 588
 589                         break;
 590         }
 591 }
 592
 593 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 594 {
 595         printf("sys_unwatch: %p - 0x%X,0x%X\n", win, ev, mod2int(mod));
 596 }
 597
 598 list_t *sys_info(void)
 599 {
 600         printf("sys_info\n");
 601
 602         if (screens == NULL && do_xinerama_check()) {
 603                 /* Add Xinerama screens */
 604                 xcb_xinerama_screen_info_t *info = NULL;
 605                 int ninfo = do_query_screens(&info);
 606                 for (int i = 0; i < ninfo; i++) {
 607                         win_t *screen = new0(win_t);
 608
 609                         screen->x = info[i].x_org;
 610                         screen->y = info[i].y_org;
 611                         screen->w = info[i].width;
 612                         screen->h = info[i].height;
 613
 614                         screens = list_insert(NULL, screen);
 615
 616                         printf("sys_info: xinerama screen - %dx%d @ %d,%d\n",
 617                                         screen->w, screen->h,
 618                                         screen->x, screen->y);
 619                 }
 620         }
 621
 622         if (screens == NULL) {
 623                 /* No xinerama support */
 624                 const xcb_setup_t *setup = xcb_get_setup(conn);
 625                 xcb_screen_t      *geom  = xcb_setup_roots_iterator(setup).data;
 626
 627                 win_t *screen = new0(win_t);
 628
 629                 screen->w = geom->width_in_pixels;
 630                 screen->h = geom->height_in_pixels;
 631
 632                 screens = list_insert(NULL, screen);
 633
 634                 printf("sys_info: root screen - %dx%d\n",
 635                                 screen->w, screen->h);
 636         }
 637
 638         return screens;
 639 }
 640
 641 void sys_init(void)
 642 {
 643         printf("sys_init\n");
 644
 645         /* Load configuration */
 646         stack      = conf_get_int("main.stack",      stack);
 647         border     = conf_get_int("main.border",     border);
 648         no_capture = conf_get_int("main.no-capture", no_capture);
 649
 650         /* Connect to display */
 651         if (!(conn = xcb_connect(NULL, NULL)))
 652                 error("xcb connect failed");
 653         if (xcb_connection_has_error(conn))
 654                 error("xcb connection has errors");
 655
 656         /* Get root window */
 657         const xcb_setup_t     *setup = xcb_get_setup(conn);
 658         xcb_screen_iterator_t  iter  = xcb_setup_roots_iterator(setup);
 659         root     = iter.data->root;
 660         colormap = iter.data->default_colormap;
 661
 662         /* Allocate key symbols */
 663         if (!(keysyms = xcb_key_symbols_alloc(conn)))
 664                 error("cannot allocate key symbols");
 665
 666         /* Read color information */
 667         colors[CLR_FOCUS]   = do_alloc_color(0xFF6060);
 668         colors[CLR_UNFOCUS] = do_alloc_color(0xD8D8FF);
 669         colors[CLR_URGENT]  = do_alloc_color(0xFF0000);
 670
 671         /* Request substructure redirect */
 672         xcb_void_cookie_t cookie;
 673         xcb_generic_error_t *err;
 674         events = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
 675                  XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY;
 676         cookie = xcb_change_window_attributes_checked(conn, root,
 677                         XCB_CW_EVENT_MASK, &events);
 678         if ((err = xcb_request_check(conn, cookie)))
 679                 error("another window manager is already running");
 680 }
 681
 682 void sys_run(void)
 683 {
 684         printf("sys_run\n");
 685
 686         /* Add each initial window */
 687         if (!no_capture) {
 688                 xcb_window_t *kids = NULL;
 689                 int nkids = do_query_tree(root, &kids);
 690                 for(int i = 0; i < nkids; i++) {
 691                         win_t *win = new0(win_t);
 692                         win->sys = new0(win_sys_t);
 693                         win->sys->xcb = kids[i];
 694                         do_get_geometry(kids[i], &win->x, &win->y, &win->w, &win->h);
 695                         do_get_window_attributes(kids[i],
 696                                 &win->sys->override, &win->sys->mapped);
 697                         tsearch(win, &cache, win_cmp);
 698                         if (!win->sys->override && win->sys->mapped)
 699                                 wm_insert(win);
 700                 }
 701                 xcb_flush(conn);
 702         }
 703
 704         /* Main loop */
 705         while (1)
 706         {
 707                 int status;
 708                 xcb_generic_event_t *event;
 709                 if (!(event = xcb_wait_for_event(conn)))
 710                         break;
 711                 on_event(event);
 712                 free(event);
 713                 if (!(status = xcb_flush(conn)))
 714                         break;
 715         }
 716 }
 717
 718 void sys_exit(void)
 719 {
 720         printf("sys_exit\n");
 721         if (conn)
 722                 xcb_disconnect(conn);
 723         conn = NULL;
 724 }
 725
 726 void sys_free(void)
 727 {
 728         printf("sys_free\n");
 729         if (conn)
 730                 xcb_disconnect(conn);
 731         conn = NULL;
 732 }