git.sur5r.net Git - i3/i3/blob - i3bar/src/xcb.c

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2011 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_atom.h>
  13
  14 #ifdef XCB_COMPAT
  15 #include "xcb_compat.h"
  16 #endif
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <string.h>
  23 #include <i3/ipc.h>
  24 #include <ev.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27 #include <err.h>
  28
  29 #include <X11/Xlib.h>
  30 #include <X11/XKBlib.h>
  31 #include <X11/extensions/XKB.h>
  32
  33 #include "common.h"
  34 #include "libi3.h"
  35
  36 /* We save the Atoms in an easy to access array, indexed by an enum */
  37 enum {
  38     #define ATOM_DO(name) name,
  39     #include "xcb_atoms.def"
  40     NUM_ATOMS
  41 };
  42
  43 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  44 xcb_atom_t               atoms[NUM_ATOMS];
  45
  46 /* Variables, that are the same for all functions at all times */
  47 xcb_connection_t *xcb_connection;
  48 int              screen;
  49 xcb_screen_t     *xcb_screen;
  50 xcb_window_t     xcb_root;
  51
  52 /* This is needed for integration with libi3 */
  53 xcb_connection_t *conn;
  54
  55 /* The font we'll use */
  56 static i3Font font;
  57
  58 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  59 Display          *xkb_dpy;
  60 int              xkb_event_base;
  61 int              mod_pressed = 0;
  62
  63 /* Because the statusline is the same on all outputs, we have
  64  * global buffer to render it on */
  65 xcb_gcontext_t   statusline_ctx;
  66 xcb_gcontext_t   statusline_clear;
  67 xcb_pixmap_t     statusline_pm;
  68 uint32_t         statusline_width;
  69
  70 /* Event-Watchers, to interact with the user */
  71 ev_prepare *xcb_prep;
  72 ev_check   *xcb_chk;
  73 ev_io      *xcb_io;
  74 ev_io      *xkb_io;
  75
  76 /* The parsed colors */
  77 struct xcb_colors_t {
  78     uint32_t bar_fg;
  79     uint32_t bar_bg;
  80     uint32_t active_ws_fg;
  81     uint32_t active_ws_bg;
  82     uint32_t inactive_ws_fg;
  83     uint32_t inactive_ws_bg;
  84     uint32_t urgent_ws_bg;
  85     uint32_t urgent_ws_fg;
  86     uint32_t focus_ws_bg;
  87     uint32_t focus_ws_fg;
  88 };
  89 struct xcb_colors_t colors;
  90
  91 /* We define xcb_request_failed as a macro to include the relevant line-number */
  92 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
  93 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
  94     xcb_generic_error_t *err;
  95     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
  96         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
  97         return err->error_code;
  98     }
  99     return 0;
 100 }
 101
 102 /*
 103  * Redraws the statusline to the buffer
 104  *
 105  */
 106 void refresh_statusline() {
 107     size_t glyph_count;
 108
 109     if (statusline == NULL) {
 110         return;
 111     }
 112
 113     xcb_char2b_t *text = (xcb_char2b_t*)convert_utf8_to_ucs2(statusline, &glyph_count);
 114     uint32_t old_statusline_width = statusline_width;
 115     statusline_width = predict_text_width((char*)text, glyph_count, true);
 116     /* If the statusline is bigger than our screen we need to make sure that
 117      * the pixmap provides enough space, so re-allocate if the width grew */
 118     if (statusline_width > xcb_screen->width_in_pixels &&
 119         statusline_width > old_statusline_width)
 120         realloc_sl_buffer();
 121
 122     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font.height };
 123     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 124     set_font_colors(statusline_ctx, colors.bar_fg, colors.bar_bg);
 125     draw_text((char*)text, glyph_count, true, statusline_pm, statusline_ctx,
 126             0, 0, xcb_screen->width_in_pixels);
 127
 128     FREE(text);
 129 }
 130
 131 /*
 132  * Hides all bars (unmaps them)
 133  *
 134  */
 135 void hide_bars() {
 136     if (!config.hide_on_modifier) {
 137         return;
 138     }
 139
 140     i3_output *walk;
 141     SLIST_FOREACH(walk, outputs, slist) {
 142         if (!walk->active) {
 143             continue;
 144         }
 145         xcb_unmap_window(xcb_connection, walk->bar);
 146     }
 147     stop_child();
 148 }
 149
 150 /*
 151  * Unhides all bars (maps them)
 152  *
 153  */
 154 void unhide_bars() {
 155     if (!config.hide_on_modifier) {
 156         return;
 157     }
 158
 159     i3_output           *walk;
 160     xcb_void_cookie_t   cookie;
 161     uint32_t            mask;
 162     uint32_t            values[5];
 163
 164     cont_child();
 165
 166     SLIST_FOREACH(walk, outputs, slist) {
 167         if (walk->bar == XCB_NONE) {
 168             continue;
 169         }
 170         mask = XCB_CONFIG_WINDOW_X |
 171                XCB_CONFIG_WINDOW_Y |
 172                XCB_CONFIG_WINDOW_WIDTH |
 173                XCB_CONFIG_WINDOW_HEIGHT |
 174                XCB_CONFIG_WINDOW_STACK_MODE;
 175         values[0] = walk->rect.x;
 176         if (config.position == POS_TOP)
 177             values[1] = walk->rect.y;
 178         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 179         values[2] = walk->rect.w;
 180         values[3] = font.height + 6;
 181         values[4] = XCB_STACK_MODE_ABOVE;
 182         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 183         cookie = xcb_configure_window_checked(xcb_connection,
 184                                               walk->bar,
 185                                               mask,
 186                                               values);
 187
 188         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 189             exit(EXIT_FAILURE);
 190         }
 191         xcb_map_window(xcb_connection, walk->bar);
 192     }
 193 }
 194
 195 /*
 196  * Parse the colors into a format that we can use
 197  *
 198  */
 199 void init_colors(const struct xcb_color_strings_t *new_colors) {
 200 #define PARSE_COLOR(name, def) \
 201     do { \
 202         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 203     } while  (0)
 204     PARSE_COLOR(bar_fg, "#FFFFFF");
 205     PARSE_COLOR(bar_bg, "#000000");
 206     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 207     PARSE_COLOR(active_ws_bg, "#333333");
 208     PARSE_COLOR(inactive_ws_fg, "#888888");
 209     PARSE_COLOR(inactive_ws_bg, "#222222");
 210     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 211     PARSE_COLOR(urgent_ws_bg, "#900000");
 212     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 213     PARSE_COLOR(focus_ws_bg, "#285577");
 214 #undef PARSE_COLOR
 215 }
 216
 217 /*
 218  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 219  * We determine, whether the click occured on a ws-button or if the scroll-
 220  * wheel was used and change the workspace appropriately
 221  *
 222  */
 223 void handle_button(xcb_button_press_event_t *event) {
 224     i3_ws *cur_ws;
 225
 226     /* Determine, which bar was clicked */
 227     i3_output *walk;
 228     xcb_window_t bar = event->event;
 229     SLIST_FOREACH(walk, outputs, slist) {
 230         if (walk->bar == bar) {
 231             break;
 232         }
 233     }
 234
 235     if (walk == NULL) {
 236         DLOG("Unknown Bar klicked!\n");
 237         return;
 238     }
 239
 240     /* TODO: Move this to extern get_ws_for_output() */
 241     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 242         if (cur_ws->visible) {
 243             break;
 244         }
 245     }
 246
 247     if (cur_ws == NULL) {
 248         DLOG("No Workspace active?\n");
 249         return;
 250     }
 251
 252     int32_t x = event->event_x;
 253
 254     DLOG("Got Button %d\n", event->detail);
 255
 256     switch (event->detail) {
 257         case 1:
 258             /* Left Mousbutton. We determine, which button was clicked
 259              * and set cur_ws accordingly */
 260             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 261                 DLOG("x = %d\n", x);
 262                 if (x < cur_ws->name_width + 10) {
 263                     break;
 264                 }
 265                 x -= cur_ws->name_width + 10;
 266             }
 267             if (cur_ws == NULL) {
 268                 return;
 269             }
 270             break;
 271         case 4:
 272             /* Mouse wheel down. We select the next ws */
 273             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 274                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 275             } else {
 276                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 277             }
 278             break;
 279         case 5:
 280             /* Mouse wheel up. We select the previos ws */
 281             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 282                 cur_ws = TAILQ_FIRST(walk->workspaces);
 283             } else {
 284                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 285             }
 286             break;
 287     }
 288
 289     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 290     char buffer[len];
 291     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 292     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 293 }
 294
 295 /*
 296  * Configures the x coordinate of all trayclients. To be called after adding a
 297  * new tray client or removing an old one.
 298  *
 299  */
 300 static void configure_trayclients() {
 301     trayclient *trayclient;
 302     i3_output *output;
 303     SLIST_FOREACH(output, outputs, slist) {
 304         if (!output->active)
 305             continue;
 306
 307         int clients = 0;
 308         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 309             if (!trayclient->mapped)
 310                 continue;
 311             clients++;
 312
 313             DLOG("Configuring tray window %08x to x=%d\n",
 314                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 315             uint32_t x = output->rect.w - (clients * (font.height + 2));
 316             xcb_configure_window(xcb_connection,
 317                                  trayclient->win,
 318                                  XCB_CONFIG_WINDOW_X,
 319                                  &x);
 320         }
 321     }
 322 }
 323
 324 /*
 325  * Handles ClientMessages (messages sent from another client directly to us).
 326  *
 327  * At the moment, only the tray window will receive client messages. All
 328  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 329  *
 330  */
 331 static void handle_client_message(xcb_client_message_event_t* event) {
 332     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 333         event->format == 32) {
 334         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 335         /* event->data.data32[0] is the timestamp */
 336         uint32_t op = event->data.data32[1];
 337         uint32_t mask;
 338         uint32_t values[2];
 339         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 340             xcb_window_t client = event->data.data32[2];
 341
 342             /* Listen for PropertyNotify events to get the most recent value of
 343              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 344             mask = XCB_CW_EVENT_MASK;
 345             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 346                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 347             xcb_change_window_attributes(xcb_connection,
 348                                          client,
 349                                          mask,
 350                                          values);
 351
 352             /* Request the _XEMBED_INFO property. The XEMBED specification
 353              * (which is referred by the tray specification) says this *has* to
 354              * be set, but VLC does not set it… */
 355             bool map_it = true;
 356             int xe_version = 1;
 357             xcb_get_property_cookie_t xembedc;
 358             xembedc = xcb_get_property_unchecked(xcb_connection,
 359                                                  0,
 360                                                  client,
 361                                                  atoms[_XEMBED_INFO],
 362                                                  XCB_GET_PROPERTY_TYPE_ANY,
 363                                                  0,
 364                                                  2 * 32);
 365
 366             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 367                                                                        xembedc,
 368                                                                        NULL);
 369             if (xembedr != NULL && xembedr->length != 0) {
 370                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 371                 uint32_t *xembed = xcb_get_property_value(xembedr);
 372                 DLOG("xembed version = %d\n", xembed[0]);
 373                 DLOG("xembed flags = %d\n", xembed[1]);
 374                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 375                 xe_version = xembed[0];
 376                 if (xe_version > 1)
 377                     xe_version = 1;
 378                 free(xembedr);
 379             } else {
 380                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 381             }
 382
 383             DLOG("X window %08x requested docking\n", client);
 384             i3_output *walk, *output = NULL;
 385             SLIST_FOREACH(walk, outputs, slist) {
 386                 if (!walk->active)
 387                     continue;
 388                 if (config.tray_output &&
 389                     strcasecmp(walk->name, config.tray_output) != 0)
 390                     continue;
 391                 DLOG("using output %s\n", walk->name);
 392                 output = walk;
 393             }
 394             if (output == NULL) {
 395                 ELOG("No output found\n");
 396                 return;
 397             }
 398             xcb_reparent_window(xcb_connection,
 399                                 client,
 400                                 output->bar,
 401                                 output->rect.w - font.height - 2,
 402                                 2);
 403             /* We reconfigure the window to use a reasonable size. The systray
 404              * specification explicitly says:
 405              *   Tray icons may be assigned any size by the system tray, and
 406              *   should do their best to cope with any size effectively
 407              */
 408             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 409             values[0] = font.height;
 410             values[1] = font.height;
 411             xcb_configure_window(xcb_connection,
 412                                  client,
 413                                  mask,
 414                                  values);
 415
 416             /* send the XEMBED_EMBEDDED_NOTIFY message */
 417             void *event = scalloc(32);
 418             xcb_client_message_event_t *ev = event;
 419             ev->response_type = XCB_CLIENT_MESSAGE;
 420             ev->window = client;
 421             ev->type = atoms[_XEMBED];
 422             ev->format = 32;
 423             ev->data.data32[0] = XCB_CURRENT_TIME;
 424             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 425             ev->data.data32[2] = output->bar;
 426             ev->data.data32[3] = xe_version;
 427             xcb_send_event(xcb_connection,
 428                            0,
 429                            client,
 430                            XCB_EVENT_MASK_NO_EVENT,
 431                            (char*)ev);
 432             free(event);
 433
 434             /* Put the client inside the save set. Upon termination (whether
 435              * killed or normal exit does not matter) of i3bar, these clients
 436              * will be correctly reparented to their most closest living
 437              * ancestor. Without this, tray icons might die when i3bar
 438              * exits/crashes. */
 439             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 440
 441             if (map_it) {
 442                 DLOG("Mapping dock client\n");
 443                 xcb_map_window(xcb_connection, client);
 444             } else {
 445                 DLOG("Not mapping dock client yet\n");
 446             }
 447             trayclient *tc = smalloc(sizeof(trayclient));
 448             tc->win = client;
 449             tc->mapped = map_it;
 450             tc->xe_version = xe_version;
 451             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 452
 453             /* Trigger an update to copy the statusline text to the appropriate
 454              * position */
 455             configure_trayclients();
 456             draw_bars();
 457         }
 458     }
 459 }
 460
 461 /*
 462  * Handles UnmapNotify events. These events happen when a tray window unmaps
 463  * itself. We then update our data structure
 464  *
 465  */
 466 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 467     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 468
 469     i3_output *walk;
 470     SLIST_FOREACH(walk, outputs, slist) {
 471         if (!walk->active)
 472             continue;
 473         DLOG("checking output %s\n", walk->name);
 474         trayclient *trayclient;
 475         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 476             if (trayclient->win != event->window)
 477                 continue;
 478
 479             DLOG("Removing tray client with window ID %08x\n", event->window);
 480             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 481
 482             /* Trigger an update, we now have more space for the statusline */
 483             configure_trayclients();
 484             draw_bars();
 485             return;
 486         }
 487     }
 488 }
 489
 490 /*
 491  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 492  * handled, which tells us whether a dock client should be mapped or unmapped.
 493  *
 494  */
 495 static void handle_property_notify(xcb_property_notify_event_t *event) {
 496     DLOG("PropertyNotify\n");
 497     if (event->atom == atoms[_XEMBED_INFO] &&
 498         event->state == XCB_PROPERTY_NEW_VALUE) {
 499         DLOG("xembed_info updated\n");
 500         trayclient *trayclient = NULL, *walk;
 501         i3_output *o_walk;
 502         SLIST_FOREACH(o_walk, outputs, slist) {
 503             if (!o_walk->active)
 504                 continue;
 505
 506             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 507                 if (walk->win != event->window)
 508                     continue;
 509                 trayclient = walk;
 510                 break;
 511             }
 512
 513             if (trayclient)
 514                 break;
 515         }
 516         if (!trayclient) {
 517             ELOG("PropertyNotify received for unknown window %08x\n",
 518                  event->window);
 519             return;
 520         }
 521         xcb_get_property_cookie_t xembedc;
 522         xembedc = xcb_get_property_unchecked(xcb_connection,
 523                                              0,
 524                                              trayclient->win,
 525                                              atoms[_XEMBED_INFO],
 526                                              XCB_GET_PROPERTY_TYPE_ANY,
 527                                              0,
 528                                              2 * 32);
 529
 530         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 531                                                                    xembedc,
 532                                                                    NULL);
 533         if (xembedr == NULL || xembedr->length == 0) {
 534             DLOG("xembed_info unset\n");
 535             return;
 536         }
 537
 538         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 539         uint32_t *xembed = xcb_get_property_value(xembedr);
 540         DLOG("xembed version = %d\n", xembed[0]);
 541         DLOG("xembed flags = %d\n", xembed[1]);
 542         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 543         DLOG("map-state now %d\n", map_it);
 544         if (trayclient->mapped && !map_it) {
 545             /* need to unmap the window */
 546             xcb_unmap_window(xcb_connection, trayclient->win);
 547             trayclient->mapped = map_it;
 548             configure_trayclients();
 549             draw_bars();
 550         } else if (!trayclient->mapped && map_it) {
 551             /* need to map the window */
 552             xcb_map_window(xcb_connection, trayclient->win);
 553             trayclient->mapped = map_it;
 554             configure_trayclients();
 555             draw_bars();
 556         }
 557         free(xembedr);
 558     }
 559 }
 560
 561 /*
 562  * Handle ConfigureRequests by denying them and sending the client a
 563  * ConfigureNotify with its actual size.
 564  *
 565  */
 566 static void handle_configure_request(xcb_configure_request_event_t *event) {
 567     DLOG("ConfigureRequest for window = %08x\n", event->window);
 568
 569     trayclient *trayclient;
 570     i3_output *output;
 571     SLIST_FOREACH(output, outputs, slist) {
 572         if (!output->active)
 573             continue;
 574
 575         int clients = 0;
 576         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 577             if (!trayclient->mapped)
 578                 continue;
 579             clients++;
 580
 581             if (trayclient->win != event->window)
 582                 continue;
 583
 584             xcb_rectangle_t rect;
 585             rect.x = output->rect.w - (clients * (font.height + 2));
 586             rect.y = 2;
 587             rect.width = font.height;
 588             rect.height = font.height;
 589
 590             DLOG("This is a tray window. x = %d\n", rect.x);
 591             fake_configure_notify(xcb_connection, rect, event->window, 0);
 592             return;
 593         }
 594     }
 595
 596     DLOG("WARNING: Could not find corresponding tray window.\n");
 597 }
 598
 599 /*
 600  * This function is called immediately before the main loop locks. We flush xcb
 601  * then (and only then)
 602  *
 603  */
 604 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 605     xcb_flush(xcb_connection);
 606 }
 607
 608 /*
 609  * This function is called immediately after the main loop locks, so when one
 610  * of the watchers registered an event.
 611  * We check whether an X-Event arrived and handle it.
 612  *
 613  */
 614 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 615     xcb_generic_event_t *event;
 616
 617     if (xcb_connection_has_error(xcb_connection)) {
 618         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 619         exit(1);
 620     }
 621
 622     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 623         switch (event->response_type & ~0x80) {
 624             case XCB_EXPOSE:
 625                 /* Expose-events happen, when the window needs to be redrawn */
 626                 redraw_bars();
 627                 break;
 628             case XCB_BUTTON_PRESS:
 629                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 630                 handle_button((xcb_button_press_event_t*) event);
 631                 break;
 632             case XCB_CLIENT_MESSAGE:
 633                 /* Client messages are used for client-to-client communication, for
 634                  * example system tray widgets talk to us directly via client messages. */
 635                 handle_client_message((xcb_client_message_event_t*) event);
 636                 break;
 637             case XCB_UNMAP_NOTIFY:
 638             case XCB_DESTROY_NOTIFY:
 639                 /* UnmapNotifies are received when a tray window unmaps itself */
 640                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 641                 break;
 642             case XCB_PROPERTY_NOTIFY:
 643                 /* PropertyNotify */
 644                 handle_property_notify((xcb_property_notify_event_t*) event);
 645                 break;
 646             case XCB_CONFIGURE_REQUEST:
 647                 /* ConfigureRequest, sent by a tray child */
 648                 handle_configure_request((xcb_configure_request_event_t*) event);
 649                 break;
 650         }
 651         free(event);
 652     }
 653 }
 654
 655 /*
 656  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 657  * are triggered
 658  *
 659  */
 660 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 661 }
 662
 663 /*
 664  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 665  *
 666  */
 667 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 668     XkbEvent ev;
 669     int modstate = 0;
 670
 671     DLOG("Got XKB-Event!\n");
 672
 673     while (XPending(xkb_dpy)) {
 674         XNextEvent(xkb_dpy, (XEvent*)&ev);
 675
 676         if (ev.type != xkb_event_base) {
 677             ELOG("No Xkb-Event!\n");
 678             continue;
 679         }
 680
 681         if (ev.any.xkb_type != XkbStateNotify) {
 682             ELOG("No State Notify!\n");
 683             continue;
 684         }
 685
 686         unsigned int mods = ev.state.mods;
 687         modstate = mods & Mod4Mask;
 688     }
 689
 690     if (modstate != mod_pressed) {
 691         if (modstate == 0) {
 692             DLOG("Mod4 got released!\n");
 693             hide_bars();
 694         } else {
 695             DLOG("Mod4 got pressed!\n");
 696             unhide_bars();
 697         }
 698         mod_pressed = modstate;
 699     }
 700 }
 701
 702 /*
 703  * Early initialization of the connection to X11: Everything which does not
 704  * depend on 'config'.
 705  *
 706  */
 707 char *init_xcb_early() {
 708     /* FIXME: xcb_connect leaks Memory */
 709     xcb_connection = xcb_connect(NULL, &screen);
 710     if (xcb_connection_has_error(xcb_connection)) {
 711         ELOG("Cannot open display\n");
 712         exit(EXIT_FAILURE);
 713     }
 714     conn = xcb_connection;
 715     DLOG("Connected to xcb\n");
 716
 717     /* We have to request the atoms we need */
 718     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 719     #include "xcb_atoms.def"
 720
 721     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 722     xcb_root = xcb_screen->root;
 723
 724     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 725      * this way, we can choose to crop it */
 726     uint32_t mask = XCB_GC_FOREGROUND;
 727     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 728
 729     statusline_clear = xcb_generate_id(xcb_connection);
 730     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 731                                                                statusline_clear,
 732                                                                xcb_root,
 733                                                                mask,
 734                                                                vals);
 735
 736     statusline_ctx = xcb_generate_id(xcb_connection);
 737     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 738                                                             statusline_ctx,
 739                                                             xcb_root,
 740                                                             0,
 741                                                             NULL);
 742
 743     statusline_pm = xcb_generate_id(xcb_connection);
 744     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 745                                                                xcb_screen->root_depth,
 746                                                                statusline_pm,
 747                                                                xcb_root,
 748                                                                xcb_screen->width_in_pixels,
 749                                                                xcb_screen->height_in_pixels);
 750
 751
 752     /* The various Watchers to communicate with xcb */
 753     xcb_io = smalloc(sizeof(ev_io));
 754     xcb_prep = smalloc(sizeof(ev_prepare));
 755     xcb_chk = smalloc(sizeof(ev_check));
 756
 757     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 758     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 759     ev_check_init(xcb_chk, &xcb_chk_cb);
 760
 761     ev_io_start(main_loop, xcb_io);
 762     ev_prepare_start(main_loop, xcb_prep);
 763     ev_check_start(main_loop, xcb_chk);
 764
 765     /* Now we get the atoms and save them in a nice data structure */
 766     get_atoms();
 767
 768     xcb_get_property_cookie_t path_cookie;
 769     path_cookie = xcb_get_property_unchecked(xcb_connection,
 770                                    0,
 771                                    xcb_root,
 772                                    atoms[I3_SOCKET_PATH],
 773                                    XCB_GET_PROPERTY_TYPE_ANY,
 774                                    0, PATH_MAX);
 775
 776     /* We check, if i3 set its socket-path */
 777     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 778                                                                   path_cookie,
 779                                                                   NULL);
 780     char *path = NULL;
 781     if (path_reply) {
 782         int len = xcb_get_property_value_length(path_reply);
 783         if (len != 0) {
 784             path = strndup(xcb_get_property_value(path_reply), len);
 785         }
 786     }
 787
 788
 789     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 790         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 791         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 792         exit(EXIT_FAILURE);
 793     }
 794
 795     return path;
 796 }
 797
 798 /*
 799  * Initialization which depends on 'config' being usable. Called after the
 800  * configuration has arrived.
 801  *
 802  */
 803 void init_xcb_late(char *fontname) {
 804     if (fontname == NULL)
 805         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 806
 807     /* Load the font */
 808     font = load_font(fontname, true);
 809     set_font(&font);
 810     DLOG("Calculated Font-height: %d\n", font.height);
 811
 812     xcb_flush(xcb_connection);
 813
 814     /* To grab modifiers without blocking other applications from receiving key-events
 815      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 816      * in xcb */
 817     if (config.hide_on_modifier) {
 818         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 819         xkb_major = XkbMajorVersion;
 820         xkb_minor = XkbMinorVersion;
 821
 822         xkb_dpy = XkbOpenDisplay(NULL,
 823                                  &xkb_event_base,
 824                                  &xkb_errbase,
 825                                  &xkb_major,
 826                                  &xkb_minor,
 827                                  &xkb_err);
 828
 829         if (xkb_dpy == NULL) {
 830             ELOG("No XKB!\n");
 831             exit(EXIT_FAILURE);
 832         }
 833
 834         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 835             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 836             exit(EXIT_FAILURE);
 837         }
 838
 839         int i1;
 840         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 841             ELOG("XKB not supported by X-server!\n");
 842             exit(EXIT_FAILURE);
 843         }
 844
 845         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 846             ELOG("Could not grab Key!\n");
 847             exit(EXIT_FAILURE);
 848         }
 849
 850         xkb_io = smalloc(sizeof(ev_io));
 851         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 852         ev_io_start(main_loop, xkb_io);
 853         XFlush(xkb_dpy);
 854     }
 855 }
 856
 857 /*
 858  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 859  * for the X11 display we are running on, then acquiring the selection for this
 860  * atom. Afterwards, tray clients will send ClientMessages to our window.
 861  *
 862  */
 863 void init_tray() {
 864     DLOG("Initializing system tray functionality\n");
 865     /* request the tray manager atom for the X11 display we are running on */
 866     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 867     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 868     xcb_intern_atom_cookie_t tray_cookie;
 869     xcb_intern_atom_reply_t *tray_reply;
 870     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 871
 872     /* tray support: we need a window to own the selection */
 873     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 874     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 875     uint32_t selval[] = { 1 };
 876     xcb_create_window(xcb_connection,
 877                       xcb_screen->root_depth,
 878                       selwin,
 879                       xcb_root,
 880                       -1, -1,
 881                       1, 1,
 882                       1,
 883                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 884                       xcb_screen->root_visual,
 885                       selmask,
 886                       selval);
 887
 888     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 889     /* set the atoms */
 890     xcb_change_property(xcb_connection,
 891                         XCB_PROP_MODE_REPLACE,
 892                         selwin,
 893                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 894                         XCB_ATOM_CARDINAL,
 895                         32,
 896                         1,
 897                         &orientation);
 898
 899     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 900         ELOG("Could not get atom %s\n", atomname);
 901         exit(EXIT_FAILURE);
 902     }
 903
 904     xcb_set_selection_owner(xcb_connection,
 905                             selwin,
 906                             tray_reply->atom,
 907                             XCB_CURRENT_TIME);
 908
 909     /* Verify that we have the selection */
 910     xcb_get_selection_owner_cookie_t selcookie;
 911     xcb_get_selection_owner_reply_t *selreply;
 912
 913     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
 914     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
 915         ELOG("Could not get selection owner for %s\n", atomname);
 916         exit(EXIT_FAILURE);
 917     }
 918
 919     if (selreply->owner != selwin) {
 920         ELOG("Could not set the %s selection. " \
 921              "Maybe another tray is already running?\n", atomname);
 922         /* NOTE that this error is not fatal. We just can’t provide tray
 923          * functionality */
 924         free(selreply);
 925         return;
 926     }
 927
 928     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
 929     void *event = scalloc(32);
 930     xcb_client_message_event_t *ev = event;
 931     ev->response_type = XCB_CLIENT_MESSAGE;
 932     ev->window = xcb_root;
 933     ev->type = atoms[MANAGER];
 934     ev->format = 32;
 935     ev->data.data32[0] = XCB_CURRENT_TIME;
 936     ev->data.data32[1] = tray_reply->atom;
 937     ev->data.data32[2] = selwin;
 938     xcb_send_event(xcb_connection,
 939                    0,
 940                    xcb_root,
 941                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 942                    (char*)ev);
 943     free(event);
 944     free(tray_reply);
 945 }
 946
 947 /*
 948  * Cleanup the xcb-stuff.
 949  * Called once, before the program terminates.
 950  *
 951  */
 952 void clean_xcb() {
 953     i3_output *o_walk;
 954     trayclient *trayclient;
 955     free_workspaces();
 956     SLIST_FOREACH(o_walk, outputs, slist) {
 957         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
 958             /* Unmap, then reparent (to root) the tray client windows */
 959             xcb_unmap_window(xcb_connection, trayclient->win);
 960             xcb_reparent_window(xcb_connection,
 961                                 trayclient->win,
 962                                 xcb_root,
 963                                 0,
 964                                 0);
 965         }
 966         destroy_window(o_walk);
 967         FREE(o_walk->trayclients);
 968         FREE(o_walk->workspaces);
 969         FREE(o_walk->name);
 970     }
 971     FREE_SLIST(outputs, i3_output);
 972     FREE(outputs);
 973
 974     xcb_flush(xcb_connection);
 975     xcb_disconnect(xcb_connection);
 976
 977     ev_check_stop(main_loop, xcb_chk);
 978     ev_prepare_stop(main_loop, xcb_prep);
 979     ev_io_stop(main_loop, xcb_io);
 980
 981     FREE(xcb_chk);
 982     FREE(xcb_prep);
 983     FREE(xcb_io);
 984 }
 985
 986 /*
 987  * Get the earlier requested atoms and save them in the prepared data structure
 988  *
 989  */
 990 void get_atoms() {
 991     xcb_intern_atom_reply_t *reply;
 992     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
 993         if (reply == NULL) { \
 994             ELOG("Could not get atom %s\n", #name); \
 995             exit(EXIT_FAILURE); \
 996         } \
 997         atoms[name] = reply->atom; \
 998         free(reply);
 999
1000     #include "xcb_atoms.def"
1001     DLOG("Got Atoms\n");
1002 }
1003
1004 /*
1005  * Destroy the bar of the specified output
1006  *
1007  */
1008 void destroy_window(i3_output *output) {
1009     if (output == NULL) {
1010         return;
1011     }
1012     if (output->bar == XCB_NONE) {
1013         return;
1014     }
1015     xcb_destroy_window(xcb_connection, output->bar);
1016     output->bar = XCB_NONE;
1017 }
1018
1019 /*
1020  * Reallocate the statusline-buffer
1021  *
1022  */
1023 void realloc_sl_buffer() {
1024     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1025          statusline_width, xcb_screen->width_in_pixels);
1026     xcb_free_pixmap(xcb_connection, statusline_pm);
1027     statusline_pm = xcb_generate_id(xcb_connection);
1028     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1029                                                                xcb_screen->root_depth,
1030                                                                statusline_pm,
1031                                                                xcb_root,
1032                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1033                                                                xcb_screen->height_in_pixels);
1034
1035     uint32_t mask = XCB_GC_FOREGROUND;
1036     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1037     xcb_free_gc(xcb_connection, statusline_clear);
1038     statusline_clear = xcb_generate_id(xcb_connection);
1039     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1040                                                                statusline_clear,
1041                                                                xcb_root,
1042                                                                mask,
1043                                                                vals);
1044
1045     mask |= XCB_GC_BACKGROUND;
1046     vals[0] = colors.bar_fg;
1047     statusline_ctx = xcb_generate_id(xcb_connection);
1048     xcb_free_gc(xcb_connection, statusline_ctx);
1049     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1050                                                             statusline_ctx,
1051                                                             xcb_root,
1052                                                             mask,
1053                                                             vals);
1054
1055     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1056         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1057         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1058         exit(EXIT_FAILURE);
1059     }
1060
1061 }
1062
1063 /*
1064  * Reconfigure all bars and create new bars for recently activated outputs
1065  *
1066  */
1067 void reconfig_windows() {
1068     uint32_t mask;
1069     uint32_t values[5];
1070     static bool tray_configured = false;
1071
1072     i3_output *walk;
1073     SLIST_FOREACH(walk, outputs, slist) {
1074         if (!walk->active) {
1075             /* If an output is not active, we destroy its bar */
1076             /* FIXME: Maybe we rather want to unmap? */
1077             DLOG("Destroying window for output %s\n", walk->name);
1078             destroy_window(walk);
1079             continue;
1080         }
1081         if (walk->bar == XCB_NONE) {
1082             DLOG("Creating Window for output %s\n", walk->name);
1083
1084             walk->bar = xcb_generate_id(xcb_connection);
1085             walk->buffer = xcb_generate_id(xcb_connection);
1086             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1087             /* Black background */
1088             values[0] = colors.bar_bg;
1089             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1090             values[1] = config.hide_on_modifier;
1091             /* We enable the following EventMask fields:
1092              * EXPOSURE, to get expose events (we have to re-draw then)
1093              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1094              *                        child windows use ConfigureWindow
1095              * BUTTON_PRESS, to handle clicks on the workspace buttons
1096              * */
1097             values[2] = XCB_EVENT_MASK_EXPOSURE |
1098                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1099             if (!config.disable_ws) {
1100                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1101             }
1102             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1103                                                                      xcb_screen->root_depth,
1104                                                                      walk->bar,
1105                                                                      xcb_root,
1106                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1107                                                                      walk->rect.w, font.height + 6,
1108                                                                      1,
1109                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1110                                                                      xcb_screen->root_visual,
1111                                                                      mask,
1112                                                                      values);
1113
1114             /* The double-buffer we use to render stuff off-screen */
1115             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1116                                                                     xcb_screen->root_depth,
1117                                                                     walk->buffer,
1118                                                                     walk->bar,
1119                                                                     walk->rect.w,
1120                                                                     walk->rect.h);
1121
1122             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1123             xcb_void_cookie_t class_cookie;
1124             class_cookie = xcb_change_property(xcb_connection,
1125                                                XCB_PROP_MODE_REPLACE,
1126                                                walk->bar,
1127                                                XCB_ATOM_WM_CLASS,
1128                                                XCB_ATOM_STRING,
1129                                                8,
1130                                                (strlen("i3bar") + 1) * 2,
1131                                                "i3bar\0i3bar\0");
1132
1133             char *name;
1134             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1135                 err(EXIT_FAILURE, "asprintf()");
1136             xcb_void_cookie_t name_cookie;
1137             name_cookie = xcb_change_property(xcb_connection,
1138                                               XCB_PROP_MODE_REPLACE,
1139                                               walk->bar,
1140                                               XCB_ATOM_WM_NAME,
1141                                               XCB_ATOM_STRING,
1142                                               8,
1143                                               strlen(name),
1144                                               name);
1145             free(name);
1146
1147             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1148              * this one */
1149             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1150                                                                 XCB_PROP_MODE_REPLACE,
1151                                                                 walk->bar,
1152                                                                 atoms[_NET_WM_WINDOW_TYPE],
1153                                                                 XCB_ATOM_ATOM,
1154                                                                 32,
1155                                                                 1,
1156                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1157
1158             /* We need to tell i3, where to reserve space for i3bar */
1159             /* left, right, top, bottom, left_start_y, left_end_y,
1160              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1161              * bottom_end_x */
1162             /* A local struct to save the strut_partial property */
1163             struct {
1164                 uint32_t left;
1165                 uint32_t right;
1166                 uint32_t top;
1167                 uint32_t bottom;
1168                 uint32_t left_start_y;
1169                 uint32_t left_end_y;
1170                 uint32_t right_start_y;
1171                 uint32_t right_end_y;
1172                 uint32_t top_start_x;
1173                 uint32_t top_end_x;
1174                 uint32_t bottom_start_x;
1175                 uint32_t bottom_end_x;
1176             } __attribute__((__packed__)) strut_partial = {0,};
1177             switch (config.position) {
1178                 case POS_NONE:
1179                     break;
1180                 case POS_TOP:
1181                     strut_partial.top = font.height + 6;
1182                     strut_partial.top_start_x = walk->rect.x;
1183                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1184                     break;
1185                 case POS_BOT:
1186                     strut_partial.bottom = font.height + 6;
1187                     strut_partial.bottom_start_x = walk->rect.x;
1188                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1189                     break;
1190             }
1191             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1192                                                                  XCB_PROP_MODE_REPLACE,
1193                                                                  walk->bar,
1194                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1195                                                                  XCB_ATOM_CARDINAL,
1196                                                                  32,
1197                                                                  12,
1198                                                                  &strut_partial);
1199
1200             /* We also want a graphics-context for the bars (it defines the properties
1201              * with which we draw to them) */
1202             walk->bargc = xcb_generate_id(xcb_connection);
1203             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1204                                                                 walk->bargc,
1205                                                                 walk->bar,
1206                                                                 0,
1207                                                                 NULL);
1208
1209             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1210             xcb_void_cookie_t map_cookie;
1211             if (!config.hide_on_modifier) {
1212                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1213             }
1214
1215             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1216                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1217                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1218                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1219                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1220                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1221                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1222                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1223                 exit(EXIT_FAILURE);
1224             }
1225
1226             if (!tray_configured &&
1227                 (!config.tray_output ||
1228                  strcasecmp("none", config.tray_output) != 0)) {
1229                 init_tray();
1230                 tray_configured = true;
1231             }
1232         } else {
1233             /* We already have a bar, so we just reconfigure it */
1234             mask = XCB_CONFIG_WINDOW_X |
1235                    XCB_CONFIG_WINDOW_Y |
1236                    XCB_CONFIG_WINDOW_WIDTH |
1237                    XCB_CONFIG_WINDOW_HEIGHT |
1238                    XCB_CONFIG_WINDOW_STACK_MODE;
1239             values[0] = walk->rect.x;
1240             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1241             values[2] = walk->rect.w;
1242             values[3] = font.height + 6;
1243             values[4] = XCB_STACK_MODE_ABOVE;
1244
1245             DLOG("Destroying buffer for output %s", walk->name);
1246             xcb_free_pixmap(xcb_connection, walk->buffer);
1247
1248             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1249             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1250                                                                         walk->bar,
1251                                                                         mask,
1252                                                                         values);
1253
1254             DLOG("Recreating buffer for output %s", walk->name);
1255             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1256                                                                     xcb_screen->root_depth,
1257                                                                     walk->buffer,
1258                                                                     walk->bar,
1259                                                                     walk->rect.w,
1260                                                                     walk->rect.h);
1261
1262             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1263                 exit(EXIT_FAILURE);
1264             }
1265             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1266                 exit(EXIT_FAILURE);
1267             }
1268         }
1269     }
1270 }
1271
1272 /*
1273  * Render the bars, with buttons and statusline
1274  *
1275  */
1276 void draw_bars() {
1277     DLOG("Drawing Bars...\n");
1278     int i = 0;
1279
1280     refresh_statusline();
1281
1282     i3_output *outputs_walk;
1283     SLIST_FOREACH(outputs_walk, outputs, slist) {
1284         if (!outputs_walk->active) {
1285             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1286             continue;
1287         }
1288         if (outputs_walk->bar == XCB_NONE) {
1289             /* Oh shit, an active output without an own bar. Create it now! */
1290             reconfig_windows();
1291         }
1292         /* First things first: clear the backbuffer */
1293         uint32_t color = colors.bar_bg;
1294         xcb_change_gc(xcb_connection,
1295                       outputs_walk->bargc,
1296                       XCB_GC_FOREGROUND,
1297                       &color);
1298         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1299         xcb_poly_fill_rectangle(xcb_connection,
1300                                 outputs_walk->buffer,
1301                                 outputs_walk->bargc,
1302                                 1,
1303                                 &rect);
1304
1305         if (statusline != NULL) {
1306             DLOG("Printing statusline!\n");
1307
1308             /* Luckily we already prepared a seperate pixmap containing the rendered
1309              * statusline, we just have to copy the relevant parts to the relevant
1310              * position */
1311             trayclient *trayclient;
1312             int traypx = 0;
1313             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1314                 if (!trayclient->mapped)
1315                     continue;
1316                 /* We assume the tray icons are quadratic (we use the font
1317                  * *height* as *width* of the icons) because we configured them
1318                  * like this. */
1319                 traypx += font.height + 2;
1320             }
1321             /* Add 2px of padding if there are any tray icons */
1322             if (traypx > 0)
1323                 traypx += 2;
1324             xcb_copy_area(xcb_connection,
1325                           statusline_pm,
1326                           outputs_walk->buffer,
1327                           outputs_walk->bargc,
1328                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1329                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1330                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1331         }
1332
1333         if (config.disable_ws) {
1334             continue;
1335         }
1336
1337         i3_ws *ws_walk;
1338         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1339             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1340             uint32_t fg_color = colors.inactive_ws_fg;
1341             uint32_t bg_color = colors.inactive_ws_bg;
1342             if (ws_walk->visible) {
1343                 if (!ws_walk->focused) {
1344                     fg_color = colors.active_ws_fg;
1345                     bg_color = colors.active_ws_bg;
1346                 } else {
1347                     fg_color = colors.focus_ws_fg;
1348                     bg_color = colors.focus_ws_bg;
1349                 }
1350             }
1351             if (ws_walk->urgent) {
1352                 DLOG("WS %s is urgent!\n", ws_walk->name);
1353                 fg_color = colors.urgent_ws_fg;
1354                 bg_color = colors.urgent_ws_bg;
1355                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1356                 unhide_bars();
1357             }
1358             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1359             uint32_t vals[] = { bg_color, bg_color };
1360             xcb_change_gc(xcb_connection,
1361                           outputs_walk->bargc,
1362                           mask,
1363                           vals);
1364             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 4 };
1365             xcb_poly_fill_rectangle(xcb_connection,
1366                                     outputs_walk->buffer,
1367                                     outputs_walk->bargc,
1368                                     1,
1369                                     &rect);
1370             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1371             draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
1372                     outputs_walk->buffer, outputs_walk->bargc, i + 5, 2, ws_walk->name_width);
1373             i += 10 + ws_walk->name_width;
1374         }
1375
1376         i = 0;
1377     }
1378
1379     redraw_bars();
1380 }
1381
1382 /*
1383  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1384  *
1385  */
1386 void redraw_bars() {
1387     i3_output *outputs_walk;
1388     SLIST_FOREACH(outputs_walk, outputs, slist) {
1389         if (!outputs_walk->active) {
1390             continue;
1391         }
1392         xcb_copy_area(xcb_connection,
1393                       outputs_walk->buffer,
1394                       outputs_walk->bar,
1395                       outputs_walk->bargc,
1396                       0, 0,
1397                       0, 0,
1398                       outputs_walk->rect.w,
1399                       outputs_walk->rect.h);
1400         xcb_flush(xcb_connection);
1401     }
1402 }