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     int 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     draw_text((char*)text, glyph_count, true, statusline_pm, statusline_ctx, 0, 0);
 125
 126     FREE(text);
 127 }
 128
 129 /*
 130  * Hides all bars (unmaps them)
 131  *
 132  */
 133 void hide_bars() {
 134     if (!config.hide_on_modifier) {
 135         return;
 136     }
 137
 138     i3_output *walk;
 139     SLIST_FOREACH(walk, outputs, slist) {
 140         if (!walk->active) {
 141             continue;
 142         }
 143         xcb_unmap_window(xcb_connection, walk->bar);
 144     }
 145     stop_child();
 146 }
 147
 148 /*
 149  * Unhides all bars (maps them)
 150  *
 151  */
 152 void unhide_bars() {
 153     if (!config.hide_on_modifier) {
 154         return;
 155     }
 156
 157     i3_output           *walk;
 158     xcb_void_cookie_t   cookie;
 159     uint32_t            mask;
 160     uint32_t            values[5];
 161
 162     cont_child();
 163
 164     SLIST_FOREACH(walk, outputs, slist) {
 165         if (walk->bar == XCB_NONE) {
 166             continue;
 167         }
 168         mask = XCB_CONFIG_WINDOW_X |
 169                XCB_CONFIG_WINDOW_Y |
 170                XCB_CONFIG_WINDOW_WIDTH |
 171                XCB_CONFIG_WINDOW_HEIGHT |
 172                XCB_CONFIG_WINDOW_STACK_MODE;
 173         values[0] = walk->rect.x;
 174         if (config.position == POS_TOP)
 175             values[1] = walk->rect.y;
 176         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 177         values[2] = walk->rect.w;
 178         values[3] = font.height + 6;
 179         values[4] = XCB_STACK_MODE_ABOVE;
 180         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 181         cookie = xcb_configure_window_checked(xcb_connection,
 182                                               walk->bar,
 183                                               mask,
 184                                               values);
 185
 186         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 187             exit(EXIT_FAILURE);
 188         }
 189         xcb_map_window(xcb_connection, walk->bar);
 190     }
 191 }
 192
 193 /*
 194  * Parse the colors into a format that we can use
 195  *
 196  */
 197 void init_colors(const struct xcb_color_strings_t *new_colors) {
 198 #define PARSE_COLOR(name, def) \
 199     do { \
 200         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 201     } while  (0)
 202     PARSE_COLOR(bar_fg, "#FFFFFF");
 203     PARSE_COLOR(bar_bg, "#000000");
 204     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 205     PARSE_COLOR(active_ws_bg, "#333333");
 206     PARSE_COLOR(inactive_ws_fg, "#888888");
 207     PARSE_COLOR(inactive_ws_bg, "#222222");
 208     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 209     PARSE_COLOR(urgent_ws_bg, "#900000");
 210     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 211     PARSE_COLOR(focus_ws_bg, "#285577");
 212 #undef PARSE_COLOR
 213 }
 214
 215 /*
 216  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 217  * We determine, whether the click occured on a ws-button or if the scroll-
 218  * wheel was used and change the workspace appropriately
 219  *
 220  */
 221 void handle_button(xcb_button_press_event_t *event) {
 222     i3_ws *cur_ws;
 223
 224     /* Determine, which bar was clicked */
 225     i3_output *walk;
 226     xcb_window_t bar = event->event;
 227     SLIST_FOREACH(walk, outputs, slist) {
 228         if (walk->bar == bar) {
 229             break;
 230         }
 231     }
 232
 233     if (walk == NULL) {
 234         DLOG("Unknown Bar klicked!\n");
 235         return;
 236     }
 237
 238     /* TODO: Move this to extern get_ws_for_output() */
 239     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 240         if (cur_ws->visible) {
 241             break;
 242         }
 243     }
 244
 245     if (cur_ws == NULL) {
 246         DLOG("No Workspace active?\n");
 247         return;
 248     }
 249
 250     int32_t x = event->event_x;
 251
 252     DLOG("Got Button %d\n", event->detail);
 253
 254     switch (event->detail) {
 255         case 1:
 256             /* Left Mousbutton. We determine, which button was clicked
 257              * and set cur_ws accordingly */
 258             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 259                 DLOG("x = %d\n", x);
 260                 if (x < cur_ws->name_width + 10) {
 261                     break;
 262                 }
 263                 x -= cur_ws->name_width + 10;
 264             }
 265             if (cur_ws == NULL) {
 266                 return;
 267             }
 268             break;
 269         case 4:
 270             /* Mouse wheel down. We select the next ws */
 271             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 272                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 273             } else {
 274                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 275             }
 276             break;
 277         case 5:
 278             /* Mouse wheel up. We select the previos ws */
 279             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 280                 cur_ws = TAILQ_FIRST(walk->workspaces);
 281             } else {
 282                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 283             }
 284             break;
 285     }
 286
 287     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 288     char buffer[len];
 289     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 290     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 291 }
 292
 293 /*
 294  * Configures the x coordinate of all trayclients. To be called after adding a
 295  * new tray client or removing an old one.
 296  *
 297  */
 298 static void configure_trayclients() {
 299     trayclient *trayclient;
 300     i3_output *output;
 301     SLIST_FOREACH(output, outputs, slist) {
 302         if (!output->active)
 303             continue;
 304
 305         int clients = 0;
 306         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 307             if (!trayclient->mapped)
 308                 continue;
 309             clients++;
 310
 311             DLOG("Configuring tray window %08x to x=%d\n",
 312                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 313             uint32_t x = output->rect.w - (clients * (font.height + 2));
 314             xcb_configure_window(xcb_connection,
 315                                  trayclient->win,
 316                                  XCB_CONFIG_WINDOW_X,
 317                                  &x);
 318         }
 319     }
 320 }
 321
 322 /*
 323  * Handles ClientMessages (messages sent from another client directly to us).
 324  *
 325  * At the moment, only the tray window will receive client messages. All
 326  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 327  *
 328  */
 329 static void handle_client_message(xcb_client_message_event_t* event) {
 330     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 331         event->format == 32) {
 332         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 333         /* event->data.data32[0] is the timestamp */
 334         uint32_t op = event->data.data32[1];
 335         uint32_t mask;
 336         uint32_t values[2];
 337         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 338             xcb_window_t client = event->data.data32[2];
 339
 340             /* Listen for PropertyNotify events to get the most recent value of
 341              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 342             mask = XCB_CW_EVENT_MASK;
 343             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 344                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 345             xcb_change_window_attributes(xcb_connection,
 346                                          client,
 347                                          mask,
 348                                          values);
 349
 350             /* Request the _XEMBED_INFO property. The XEMBED specification
 351              * (which is referred by the tray specification) says this *has* to
 352              * be set, but VLC does not set it… */
 353             bool map_it = true;
 354             int xe_version = 1;
 355             xcb_get_property_cookie_t xembedc;
 356             xembedc = xcb_get_property_unchecked(xcb_connection,
 357                                                  0,
 358                                                  client,
 359                                                  atoms[_XEMBED_INFO],
 360                                                  XCB_GET_PROPERTY_TYPE_ANY,
 361                                                  0,
 362                                                  2 * 32);
 363
 364             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 365                                                                        xembedc,
 366                                                                        NULL);
 367             if (xembedr != NULL && xembedr->length != 0) {
 368                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 369                 uint32_t *xembed = xcb_get_property_value(xembedr);
 370                 DLOG("xembed version = %d\n", xembed[0]);
 371                 DLOG("xembed flags = %d\n", xembed[1]);
 372                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 373                 xe_version = xembed[0];
 374                 if (xe_version > 1)
 375                     xe_version = 1;
 376                 free(xembedr);
 377             } else {
 378                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 379             }
 380
 381             DLOG("X window %08x requested docking\n", client);
 382             i3_output *walk, *output = NULL;
 383             SLIST_FOREACH(walk, outputs, slist) {
 384                 if (!walk->active)
 385                     continue;
 386                 if (config.tray_output &&
 387                     strcasecmp(walk->name, config.tray_output) != 0)
 388                     continue;
 389                 DLOG("using output %s\n", walk->name);
 390                 output = walk;
 391             }
 392             if (output == NULL) {
 393                 ELOG("No output found\n");
 394                 return;
 395             }
 396             xcb_reparent_window(xcb_connection,
 397                                 client,
 398                                 output->bar,
 399                                 output->rect.w - font.height - 2,
 400                                 2);
 401             /* We reconfigure the window to use a reasonable size. The systray
 402              * specification explicitly says:
 403              *   Tray icons may be assigned any size by the system tray, and
 404              *   should do their best to cope with any size effectively
 405              */
 406             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 407             values[0] = font.height;
 408             values[1] = font.height;
 409             xcb_configure_window(xcb_connection,
 410                                  client,
 411                                  mask,
 412                                  values);
 413
 414             /* send the XEMBED_EMBEDDED_NOTIFY message */
 415             void *event = scalloc(32);
 416             xcb_client_message_event_t *ev = event;
 417             ev->response_type = XCB_CLIENT_MESSAGE;
 418             ev->window = client;
 419             ev->type = atoms[_XEMBED];
 420             ev->format = 32;
 421             ev->data.data32[0] = XCB_CURRENT_TIME;
 422             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 423             ev->data.data32[2] = output->bar;
 424             ev->data.data32[3] = xe_version;
 425             xcb_send_event(xcb_connection,
 426                            0,
 427                            client,
 428                            XCB_EVENT_MASK_NO_EVENT,
 429                            (char*)ev);
 430             free(event);
 431
 432             /* Put the client inside the save set. Upon termination (whether
 433              * killed or normal exit does not matter) of i3bar, these clients
 434              * will be correctly reparented to their most closest living
 435              * ancestor. Without this, tray icons might die when i3bar
 436              * exits/crashes. */
 437             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 438
 439             if (map_it) {
 440                 DLOG("Mapping dock client\n");
 441                 xcb_map_window(xcb_connection, client);
 442             } else {
 443                 DLOG("Not mapping dock client yet\n");
 444             }
 445             trayclient *tc = smalloc(sizeof(trayclient));
 446             tc->win = client;
 447             tc->mapped = map_it;
 448             tc->xe_version = xe_version;
 449             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 450
 451             /* Trigger an update to copy the statusline text to the appropriate
 452              * position */
 453             configure_trayclients();
 454             draw_bars();
 455         }
 456     }
 457 }
 458
 459 /*
 460  * Handles UnmapNotify events. These events happen when a tray window unmaps
 461  * itself. We then update our data structure
 462  *
 463  */
 464 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 465     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 466
 467     i3_output *walk;
 468     SLIST_FOREACH(walk, outputs, slist) {
 469         if (!walk->active)
 470             continue;
 471         DLOG("checking output %s\n", walk->name);
 472         trayclient *trayclient;
 473         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 474             if (trayclient->win != event->window)
 475                 continue;
 476
 477             DLOG("Removing tray client with window ID %08x\n", event->window);
 478             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 479
 480             /* Trigger an update, we now have more space for the statusline */
 481             configure_trayclients();
 482             draw_bars();
 483             return;
 484         }
 485     }
 486 }
 487
 488 /*
 489  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 490  * handled, which tells us whether a dock client should be mapped or unmapped.
 491  *
 492  */
 493 static void handle_property_notify(xcb_property_notify_event_t *event) {
 494     DLOG("PropertyNotify\n");
 495     if (event->atom == atoms[_XEMBED_INFO] &&
 496         event->state == XCB_PROPERTY_NEW_VALUE) {
 497         DLOG("xembed_info updated\n");
 498         trayclient *trayclient = NULL, *walk;
 499         i3_output *o_walk;
 500         SLIST_FOREACH(o_walk, outputs, slist) {
 501             if (!o_walk->active)
 502                 continue;
 503
 504             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 505                 if (walk->win != event->window)
 506                     continue;
 507                 trayclient = walk;
 508                 break;
 509             }
 510
 511             if (trayclient)
 512                 break;
 513         }
 514         if (!trayclient) {
 515             ELOG("PropertyNotify received for unknown window %08x\n",
 516                  event->window);
 517             return;
 518         }
 519         xcb_get_property_cookie_t xembedc;
 520         xembedc = xcb_get_property_unchecked(xcb_connection,
 521                                              0,
 522                                              trayclient->win,
 523                                              atoms[_XEMBED_INFO],
 524                                              XCB_GET_PROPERTY_TYPE_ANY,
 525                                              0,
 526                                              2 * 32);
 527
 528         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 529                                                                    xembedc,
 530                                                                    NULL);
 531         if (xembedr == NULL || xembedr->length == 0) {
 532             DLOG("xembed_info unset\n");
 533             return;
 534         }
 535
 536         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 537         uint32_t *xembed = xcb_get_property_value(xembedr);
 538         DLOG("xembed version = %d\n", xembed[0]);
 539         DLOG("xembed flags = %d\n", xembed[1]);
 540         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 541         DLOG("map-state now %d\n", map_it);
 542         if (trayclient->mapped && !map_it) {
 543             /* need to unmap the window */
 544             xcb_unmap_window(xcb_connection, trayclient->win);
 545             trayclient->mapped = map_it;
 546             configure_trayclients();
 547             draw_bars();
 548         } else if (!trayclient->mapped && map_it) {
 549             /* need to map the window */
 550             xcb_map_window(xcb_connection, trayclient->win);
 551             trayclient->mapped = map_it;
 552             configure_trayclients();
 553             draw_bars();
 554         }
 555         free(xembedr);
 556     }
 557 }
 558
 559 /*
 560  * Handle ConfigureRequests by denying them and sending the client a
 561  * ConfigureNotify with its actual size.
 562  *
 563  */
 564 static void handle_configure_request(xcb_configure_request_event_t *event) {
 565     DLOG("ConfigureRequest for window = %08x\n", event->window);
 566
 567     trayclient *trayclient;
 568     i3_output *output;
 569     SLIST_FOREACH(output, outputs, slist) {
 570         if (!output->active)
 571             continue;
 572
 573         int clients = 0;
 574         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 575             if (!trayclient->mapped)
 576                 continue;
 577             clients++;
 578
 579             if (trayclient->win != event->window)
 580                 continue;
 581
 582             xcb_rectangle_t rect;
 583             rect.x = output->rect.w - (clients * (font.height + 2));
 584             rect.y = 2;
 585             rect.width = font.height;
 586             rect.height = font.height;
 587
 588             DLOG("This is a tray window. x = %d\n", rect.x);
 589             fake_configure_notify(xcb_connection, rect, event->window, 0);
 590             return;
 591         }
 592     }
 593
 594     DLOG("WARNING: Could not find corresponding tray window.\n");
 595 }
 596
 597 /*
 598  * This function is called immediately before the main loop locks. We flush xcb
 599  * then (and only then)
 600  *
 601  */
 602 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 603     xcb_flush(xcb_connection);
 604 }
 605
 606 /*
 607  * This function is called immediately after the main loop locks, so when one
 608  * of the watchers registered an event.
 609  * We check whether an X-Event arrived and handle it.
 610  *
 611  */
 612 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 613     xcb_generic_event_t *event;
 614
 615     if (xcb_connection_has_error(xcb_connection)) {
 616         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 617         exit(1);
 618     }
 619
 620     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 621         switch (event->response_type & ~0x80) {
 622             case XCB_EXPOSE:
 623                 /* Expose-events happen, when the window needs to be redrawn */
 624                 redraw_bars();
 625                 break;
 626             case XCB_BUTTON_PRESS:
 627                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 628                 handle_button((xcb_button_press_event_t*) event);
 629                 break;
 630             case XCB_CLIENT_MESSAGE:
 631                 /* Client messages are used for client-to-client communication, for
 632                  * example system tray widgets talk to us directly via client messages. */
 633                 handle_client_message((xcb_client_message_event_t*) event);
 634                 break;
 635             case XCB_UNMAP_NOTIFY:
 636             case XCB_DESTROY_NOTIFY:
 637                 /* UnmapNotifies are received when a tray window unmaps itself */
 638                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 639                 break;
 640             case XCB_PROPERTY_NOTIFY:
 641                 /* PropertyNotify */
 642                 handle_property_notify((xcb_property_notify_event_t*) event);
 643                 break;
 644             case XCB_CONFIGURE_REQUEST:
 645                 /* ConfigureRequest, sent by a tray child */
 646                 handle_configure_request((xcb_configure_request_event_t*) event);
 647                 break;
 648         }
 649         free(event);
 650     }
 651 }
 652
 653 /*
 654  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 655  * are triggered
 656  *
 657  */
 658 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 659 }
 660
 661 /*
 662  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 663  *
 664  */
 665 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 666     XkbEvent ev;
 667     int modstate = 0;
 668
 669     DLOG("Got XKB-Event!\n");
 670
 671     while (XPending(xkb_dpy)) {
 672         XNextEvent(xkb_dpy, (XEvent*)&ev);
 673
 674         if (ev.type != xkb_event_base) {
 675             ELOG("No Xkb-Event!\n");
 676             continue;
 677         }
 678
 679         if (ev.any.xkb_type != XkbStateNotify) {
 680             ELOG("No State Notify!\n");
 681             continue;
 682         }
 683
 684         unsigned int mods = ev.state.mods;
 685         modstate = mods & Mod4Mask;
 686     }
 687
 688     if (modstate != mod_pressed) {
 689         if (modstate == 0) {
 690             DLOG("Mod4 got released!\n");
 691             hide_bars();
 692         } else {
 693             DLOG("Mod4 got pressed!\n");
 694             unhide_bars();
 695         }
 696         mod_pressed = modstate;
 697     }
 698 }
 699
 700 /*
 701  * Early initialization of the connection to X11: Everything which does not
 702  * depend on 'config'.
 703  *
 704  */
 705 char *init_xcb_early() {
 706     /* FIXME: xcb_connect leaks Memory */
 707     xcb_connection = xcb_connect(NULL, &screen);
 708     if (xcb_connection_has_error(xcb_connection)) {
 709         ELOG("Cannot open display\n");
 710         exit(EXIT_FAILURE);
 711     }
 712     conn = xcb_connection;
 713     DLOG("Connected to xcb\n");
 714
 715     /* We have to request the atoms we need */
 716     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 717     #include "xcb_atoms.def"
 718
 719     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 720     xcb_root = xcb_screen->root;
 721
 722     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 723      * this way, we can choose to crop it */
 724     uint32_t mask = XCB_GC_FOREGROUND;
 725     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 726
 727     statusline_clear = xcb_generate_id(xcb_connection);
 728     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 729                                                                statusline_clear,
 730                                                                xcb_root,
 731                                                                mask,
 732                                                                vals);
 733
 734     mask |= XCB_GC_BACKGROUND;
 735     vals[0] = colors.bar_fg;
 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                                                             mask,
 741                                                             vals);
 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     /* Set the font in the gc */
 813     xcb_change_gc(xcb_connection, statusline_ctx, XCB_GC_FONT, (uint32_t[]){ font.id });
 814
 815     xcb_flush(xcb_connection);
 816
 817     /* To grab modifiers without blocking other applications from receiving key-events
 818      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 819      * in xcb */
 820     if (config.hide_on_modifier) {
 821         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 822         xkb_major = XkbMajorVersion;
 823         xkb_minor = XkbMinorVersion;
 824
 825         xkb_dpy = XkbOpenDisplay(NULL,
 826                                  &xkb_event_base,
 827                                  &xkb_errbase,
 828                                  &xkb_major,
 829                                  &xkb_minor,
 830                                  &xkb_err);
 831
 832         if (xkb_dpy == NULL) {
 833             ELOG("No XKB!\n");
 834             exit(EXIT_FAILURE);
 835         }
 836
 837         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 838             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 839             exit(EXIT_FAILURE);
 840         }
 841
 842         int i1;
 843         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 844             ELOG("XKB not supported by X-server!\n");
 845             exit(EXIT_FAILURE);
 846         }
 847
 848         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 849             ELOG("Could not grab Key!\n");
 850             exit(EXIT_FAILURE);
 851         }
 852
 853         xkb_io = smalloc(sizeof(ev_io));
 854         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 855         ev_io_start(main_loop, xkb_io);
 856         XFlush(xkb_dpy);
 857     }
 858 }
 859
 860 /*
 861  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 862  * for the X11 display we are running on, then acquiring the selection for this
 863  * atom. Afterwards, tray clients will send ClientMessages to our window.
 864  *
 865  */
 866 void init_tray() {
 867     DLOG("Initializing system tray functionality\n");
 868     /* request the tray manager atom for the X11 display we are running on */
 869     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 870     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 871     xcb_intern_atom_cookie_t tray_cookie;
 872     xcb_intern_atom_reply_t *tray_reply;
 873     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 874
 875     /* tray support: we need a window to own the selection */
 876     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 877     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 878     uint32_t selval[] = { 1 };
 879     xcb_create_window(xcb_connection,
 880                       xcb_screen->root_depth,
 881                       selwin,
 882                       xcb_root,
 883                       -1, -1,
 884                       1, 1,
 885                       1,
 886                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 887                       xcb_screen->root_visual,
 888                       selmask,
 889                       selval);
 890
 891     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 892     /* set the atoms */
 893     xcb_change_property(xcb_connection,
 894                         XCB_PROP_MODE_REPLACE,
 895                         selwin,
 896                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 897                         XCB_ATOM_CARDINAL,
 898                         32,
 899                         1,
 900                         &orientation);
 901
 902     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 903         ELOG("Could not get atom %s\n", atomname);
 904         exit(EXIT_FAILURE);
 905     }
 906
 907     xcb_set_selection_owner(xcb_connection,
 908                             selwin,
 909                             tray_reply->atom,
 910                             XCB_CURRENT_TIME);
 911
 912     /* Verify that we have the selection */
 913     xcb_get_selection_owner_cookie_t selcookie;
 914     xcb_get_selection_owner_reply_t *selreply;
 915
 916     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
 917     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
 918         ELOG("Could not get selection owner for %s\n", atomname);
 919         exit(EXIT_FAILURE);
 920     }
 921
 922     if (selreply->owner != selwin) {
 923         ELOG("Could not set the %s selection. " \
 924              "Maybe another tray is already running?\n", atomname);
 925         /* NOTE that this error is not fatal. We just can’t provide tray
 926          * functionality */
 927         free(selreply);
 928         return;
 929     }
 930
 931     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
 932     void *event = scalloc(32);
 933     xcb_client_message_event_t *ev = event;
 934     ev->response_type = XCB_CLIENT_MESSAGE;
 935     ev->window = xcb_root;
 936     ev->type = atoms[MANAGER];
 937     ev->format = 32;
 938     ev->data.data32[0] = XCB_CURRENT_TIME;
 939     ev->data.data32[1] = tray_reply->atom;
 940     ev->data.data32[2] = selwin;
 941     xcb_send_event(xcb_connection,
 942                    0,
 943                    xcb_root,
 944                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 945                    (char*)ev);
 946     free(event);
 947     free(tray_reply);
 948 }
 949
 950 /*
 951  * Cleanup the xcb-stuff.
 952  * Called once, before the program terminates.
 953  *
 954  */
 955 void clean_xcb() {
 956     i3_output *o_walk;
 957     trayclient *trayclient;
 958     free_workspaces();
 959     SLIST_FOREACH(o_walk, outputs, slist) {
 960         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
 961             /* Unmap, then reparent (to root) the tray client windows */
 962             xcb_unmap_window(xcb_connection, trayclient->win);
 963             xcb_reparent_window(xcb_connection,
 964                                 trayclient->win,
 965                                 xcb_root,
 966                                 0,
 967                                 0);
 968         }
 969         destroy_window(o_walk);
 970         FREE(o_walk->trayclients);
 971         FREE(o_walk->workspaces);
 972         FREE(o_walk->name);
 973     }
 974     FREE_SLIST(outputs, i3_output);
 975     FREE(outputs);
 976
 977     xcb_flush(xcb_connection);
 978     xcb_disconnect(xcb_connection);
 979
 980     ev_check_stop(main_loop, xcb_chk);
 981     ev_prepare_stop(main_loop, xcb_prep);
 982     ev_io_stop(main_loop, xcb_io);
 983
 984     FREE(xcb_chk);
 985     FREE(xcb_prep);
 986     FREE(xcb_io);
 987 }
 988
 989 /*
 990  * Get the earlier requested atoms and save them in the prepared data structure
 991  *
 992  */
 993 void get_atoms() {
 994     xcb_intern_atom_reply_t *reply;
 995     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
 996         if (reply == NULL) { \
 997             ELOG("Could not get atom %s\n", #name); \
 998             exit(EXIT_FAILURE); \
 999         } \
1000         atoms[name] = reply->atom; \
1001         free(reply);
1002
1003     #include "xcb_atoms.def"
1004     DLOG("Got Atoms\n");
1005 }
1006
1007 /*
1008  * Destroy the bar of the specified output
1009  *
1010  */
1011 void destroy_window(i3_output *output) {
1012     if (output == NULL) {
1013         return;
1014     }
1015     if (output->bar == XCB_NONE) {
1016         return;
1017     }
1018     xcb_destroy_window(xcb_connection, output->bar);
1019     output->bar = XCB_NONE;
1020 }
1021
1022 /*
1023  * Reallocate the statusline-buffer
1024  *
1025  */
1026 void realloc_sl_buffer() {
1027     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1028          statusline_width, xcb_screen->width_in_pixels);
1029     xcb_free_pixmap(xcb_connection, statusline_pm);
1030     statusline_pm = xcb_generate_id(xcb_connection);
1031     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1032                                                                xcb_screen->root_depth,
1033                                                                statusline_pm,
1034                                                                xcb_root,
1035                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1036                                                                xcb_screen->height_in_pixels);
1037
1038     uint32_t mask = XCB_GC_FOREGROUND;
1039     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, font.id };
1040     xcb_free_gc(xcb_connection, statusline_clear);
1041     statusline_clear = xcb_generate_id(xcb_connection);
1042     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1043                                                                statusline_clear,
1044                                                                xcb_root,
1045                                                                mask,
1046                                                                vals);
1047
1048     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
1049     vals[0] = colors.bar_fg;
1050     statusline_ctx = xcb_generate_id(xcb_connection);
1051     xcb_free_gc(xcb_connection, statusline_ctx);
1052     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1053                                                             statusline_ctx,
1054                                                             xcb_root,
1055                                                             mask,
1056                                                             vals);
1057
1058     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1059         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1060         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1061         exit(EXIT_FAILURE);
1062     }
1063
1064 }
1065
1066 /*
1067  * Reconfigure all bars and create new bars for recently activated outputs
1068  *
1069  */
1070 void reconfig_windows() {
1071     uint32_t mask;
1072     uint32_t values[5];
1073     static bool tray_configured = false;
1074
1075     i3_output *walk;
1076     SLIST_FOREACH(walk, outputs, slist) {
1077         if (!walk->active) {
1078             /* If an output is not active, we destroy its bar */
1079             /* FIXME: Maybe we rather want to unmap? */
1080             DLOG("Destroying window for output %s\n", walk->name);
1081             destroy_window(walk);
1082             continue;
1083         }
1084         if (walk->bar == XCB_NONE) {
1085             DLOG("Creating Window for output %s\n", walk->name);
1086
1087             walk->bar = xcb_generate_id(xcb_connection);
1088             walk->buffer = xcb_generate_id(xcb_connection);
1089             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1090             /* Black background */
1091             values[0] = colors.bar_bg;
1092             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1093             values[1] = config.hide_on_modifier;
1094             /* We enable the following EventMask fields:
1095              * EXPOSURE, to get expose events (we have to re-draw then)
1096              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1097              *                        child windows use ConfigureWindow
1098              * BUTTON_PRESS, to handle clicks on the workspace buttons
1099              * */
1100             values[2] = XCB_EVENT_MASK_EXPOSURE |
1101                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1102             if (!config.disable_ws) {
1103                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1104             }
1105             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1106                                                                      xcb_screen->root_depth,
1107                                                                      walk->bar,
1108                                                                      xcb_root,
1109                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1110                                                                      walk->rect.w, font.height + 6,
1111                                                                      1,
1112                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1113                                                                      xcb_screen->root_visual,
1114                                                                      mask,
1115                                                                      values);
1116
1117             /* The double-buffer we use to render stuff off-screen */
1118             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1119                                                                     xcb_screen->root_depth,
1120                                                                     walk->buffer,
1121                                                                     walk->bar,
1122                                                                     walk->rect.w,
1123                                                                     walk->rect.h);
1124
1125             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1126             xcb_void_cookie_t class_cookie;
1127             class_cookie = xcb_change_property(xcb_connection,
1128                                                XCB_PROP_MODE_REPLACE,
1129                                                walk->bar,
1130                                                XCB_ATOM_WM_CLASS,
1131                                                XCB_ATOM_STRING,
1132                                                8,
1133                                                (strlen("i3bar") + 1) * 2,
1134                                                "i3bar\0i3bar\0");
1135
1136             char *name;
1137             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1138                 err(EXIT_FAILURE, "asprintf()");
1139             xcb_void_cookie_t name_cookie;
1140             name_cookie = xcb_change_property(xcb_connection,
1141                                               XCB_PROP_MODE_REPLACE,
1142                                               walk->bar,
1143                                               XCB_ATOM_WM_NAME,
1144                                               XCB_ATOM_STRING,
1145                                               8,
1146                                               strlen(name),
1147                                               name);
1148             free(name);
1149
1150             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1151              * this one */
1152             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1153                                                                 XCB_PROP_MODE_REPLACE,
1154                                                                 walk->bar,
1155                                                                 atoms[_NET_WM_WINDOW_TYPE],
1156                                                                 XCB_ATOM_ATOM,
1157                                                                 32,
1158                                                                 1,
1159                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1160
1161             /* We need to tell i3, where to reserve space for i3bar */
1162             /* left, right, top, bottom, left_start_y, left_end_y,
1163              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1164              * bottom_end_x */
1165             /* A local struct to save the strut_partial property */
1166             struct {
1167                 uint32_t left;
1168                 uint32_t right;
1169                 uint32_t top;
1170                 uint32_t bottom;
1171                 uint32_t left_start_y;
1172                 uint32_t left_end_y;
1173                 uint32_t right_start_y;
1174                 uint32_t right_end_y;
1175                 uint32_t top_start_x;
1176                 uint32_t top_end_x;
1177                 uint32_t bottom_start_x;
1178                 uint32_t bottom_end_x;
1179             } __attribute__((__packed__)) strut_partial = {0,};
1180             switch (config.position) {
1181                 case POS_NONE:
1182                     break;
1183                 case POS_TOP:
1184                     strut_partial.top = font.height + 6;
1185                     strut_partial.top_start_x = walk->rect.x;
1186                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1187                     break;
1188                 case POS_BOT:
1189                     strut_partial.bottom = font.height + 6;
1190                     strut_partial.bottom_start_x = walk->rect.x;
1191                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1192                     break;
1193             }
1194             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1195                                                                  XCB_PROP_MODE_REPLACE,
1196                                                                  walk->bar,
1197                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1198                                                                  XCB_ATOM_CARDINAL,
1199                                                                  32,
1200                                                                  12,
1201                                                                  &strut_partial);
1202
1203             /* We also want a graphics-context for the bars (it defines the properties
1204              * with which we draw to them) */
1205             walk->bargc = xcb_generate_id(xcb_connection);
1206             mask = XCB_GC_FONT;
1207             values[0] = font.id;
1208             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1209                                                                 walk->bargc,
1210                                                                 walk->bar,
1211                                                                 mask,
1212                                                                 values);
1213
1214             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1215             xcb_void_cookie_t map_cookie;
1216             if (!config.hide_on_modifier) {
1217                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1218             }
1219
1220             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1221                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1222                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1223                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1224                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1225                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1226                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1227                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1228                 exit(EXIT_FAILURE);
1229             }
1230
1231             if (!tray_configured &&
1232                 (!config.tray_output ||
1233                  strcasecmp("none", config.tray_output) != 0)) {
1234                 init_tray();
1235                 tray_configured = true;
1236             }
1237         } else {
1238             /* We already have a bar, so we just reconfigure it */
1239             mask = XCB_CONFIG_WINDOW_X |
1240                    XCB_CONFIG_WINDOW_Y |
1241                    XCB_CONFIG_WINDOW_WIDTH |
1242                    XCB_CONFIG_WINDOW_HEIGHT |
1243                    XCB_CONFIG_WINDOW_STACK_MODE;
1244             values[0] = walk->rect.x;
1245             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1246             values[2] = walk->rect.w;
1247             values[3] = font.height + 6;
1248             values[4] = XCB_STACK_MODE_ABOVE;
1249
1250             DLOG("Destroying buffer for output %s", walk->name);
1251             xcb_free_pixmap(xcb_connection, walk->buffer);
1252
1253             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1254             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1255                                                                         walk->bar,
1256                                                                         mask,
1257                                                                         values);
1258
1259             DLOG("Recreating buffer for output %s", walk->name);
1260             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1261                                                                     xcb_screen->root_depth,
1262                                                                     walk->buffer,
1263                                                                     walk->bar,
1264                                                                     walk->rect.w,
1265                                                                     walk->rect.h);
1266
1267             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1268                 exit(EXIT_FAILURE);
1269             }
1270             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1271                 exit(EXIT_FAILURE);
1272             }
1273         }
1274     }
1275 }
1276
1277 /*
1278  * Render the bars, with buttons and statusline
1279  *
1280  */
1281 void draw_bars() {
1282     DLOG("Drawing Bars...\n");
1283     int i = 0;
1284
1285     refresh_statusline();
1286
1287     i3_output *outputs_walk;
1288     SLIST_FOREACH(outputs_walk, outputs, slist) {
1289         if (!outputs_walk->active) {
1290             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1291             continue;
1292         }
1293         if (outputs_walk->bar == XCB_NONE) {
1294             /* Oh shit, an active output without an own bar. Create it now! */
1295             reconfig_windows();
1296         }
1297         /* First things first: clear the backbuffer */
1298         uint32_t color = colors.bar_bg;
1299         xcb_change_gc(xcb_connection,
1300                       outputs_walk->bargc,
1301                       XCB_GC_FOREGROUND,
1302                       &color);
1303         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1304         xcb_poly_fill_rectangle(xcb_connection,
1305                                 outputs_walk->buffer,
1306                                 outputs_walk->bargc,
1307                                 1,
1308                                 &rect);
1309
1310         if (statusline != NULL) {
1311             DLOG("Printing statusline!\n");
1312
1313             /* Luckily we already prepared a seperate pixmap containing the rendered
1314              * statusline, we just have to copy the relevant parts to the relevant
1315              * position */
1316             trayclient *trayclient;
1317             int traypx = 0;
1318             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1319                 if (!trayclient->mapped)
1320                     continue;
1321                 /* We assume the tray icons are quadratic (we use the font
1322                  * *height* as *width* of the icons) because we configured them
1323                  * like this. */
1324                 traypx += font.height + 2;
1325             }
1326             /* Add 2px of padding if there are any tray icons */
1327             if (traypx > 0)
1328                 traypx += 2;
1329             xcb_copy_area(xcb_connection,
1330                           statusline_pm,
1331                           outputs_walk->buffer,
1332                           outputs_walk->bargc,
1333                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1334                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1335                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1336         }
1337
1338         if (config.disable_ws) {
1339             continue;
1340         }
1341
1342         i3_ws *ws_walk;
1343         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1344             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1345             uint32_t fg_color = colors.inactive_ws_fg;
1346             uint32_t bg_color = colors.inactive_ws_bg;
1347             if (ws_walk->visible) {
1348                 if (!ws_walk->focused) {
1349                     fg_color = colors.active_ws_fg;
1350                     bg_color = colors.active_ws_bg;
1351                 } else {
1352                     fg_color = colors.focus_ws_fg;
1353                     bg_color = colors.focus_ws_bg;
1354                 }
1355             }
1356             if (ws_walk->urgent) {
1357                 DLOG("WS %s is urgent!\n", ws_walk->name);
1358                 fg_color = colors.urgent_ws_fg;
1359                 bg_color = colors.urgent_ws_bg;
1360                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1361                 unhide_bars();
1362             }
1363             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1364             uint32_t vals[] = { bg_color, bg_color };
1365             xcb_change_gc(xcb_connection,
1366                           outputs_walk->bargc,
1367                           mask,
1368                           vals);
1369             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 4 };
1370             xcb_poly_fill_rectangle(xcb_connection,
1371                                     outputs_walk->buffer,
1372                                     outputs_walk->bargc,
1373                                     1,
1374                                     &rect);
1375             xcb_change_gc(xcb_connection,
1376                           outputs_walk->bargc,
1377                           XCB_GC_FOREGROUND,
1378                           &fg_color);
1379             draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
1380                     outputs_walk->buffer, outputs_walk->bargc, i + 5, 2);
1381             i += 10 + ws_walk->name_width;
1382         }
1383
1384         i = 0;
1385     }
1386
1387     redraw_bars();
1388 }
1389
1390 /*
1391  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1392  *
1393  */
1394 void redraw_bars() {
1395     i3_output *outputs_walk;
1396     SLIST_FOREACH(outputs_walk, outputs, slist) {
1397         if (!outputs_walk->active) {
1398             continue;
1399         }
1400         xcb_copy_area(xcb_connection,
1401                       outputs_walk->buffer,
1402                       outputs_walk->bar,
1403                       outputs_walk->bargc,
1404                       0, 0,
1405                       0, 0,
1406                       outputs_walk->rect.w,
1407                       outputs_walk->rect.h);
1408         xcb_flush(xcb_connection);
1409     }
1410 }