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   1 /*
   2  * i3bar - an xcb-based status- and ws-bar for i3
   3  *
   4  * © 2010-2011 Axel Wagner and contributors
   5  *
   6  * See file LICNSE for license information
   7  *
   8  * src/xcb.c: Communicating with X
   9  *
  10  */
  11 #include <xcb/xcb.h>
  12 #include <xcb/xproto.h>
  13 #include <xcb/xcb_atom.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <string.h>
  19 #include <i3/ipc.h>
  20 #include <ev.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23
  24 #include <X11/Xlib.h>
  25 #include <X11/XKBlib.h>
  26 #include <X11/extensions/XKB.h>
  27
  28 #include "common.h"
  29
  30 #if defined(__APPLE__)
  31
  32 /*
  33  * Taken from FreeBSD
  34  * Returns a pointer to a new string which is a duplicate of the
  35  * string, but only copies at most n characters.
  36  *
  37  */
  38 char *strndup(const char *str, size_t n) {
  39     size_t len;
  40     char *copy;
  41
  42     for (len = 0; len < n && str[len]; len++)
  43         continue;
  44
  45     if ((copy = malloc(len + 1)) == NULL)
  46         return (NULL);
  47     memcpy(copy, str, len);
  48     copy[len] = '\0';
  49     return (copy);
  50 }
  51
  52 #endif
  53
  54 /* We save the Atoms in an easy to access array, indexed by an enum */
  55 enum {
  56     #define ATOM_DO(name) name,
  57     #include "xcb_atoms.def"
  58     NUM_ATOMS
  59 };
  60
  61 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  62 xcb_atom_t               atoms[NUM_ATOMS];
  63
  64 /* Variables, that are the same for all functions at all times */
  65 xcb_connection_t *xcb_connection;
  66 int              screen;
  67 xcb_screen_t     *xcb_screen;
  68 xcb_window_t     xcb_root;
  69 xcb_font_t       xcb_font;
  70
  71 /* We need to cache some data to speed up text-width-prediction */
  72 xcb_query_font_reply_t *font_info;
  73 int                    font_height;
  74 xcb_charinfo_t         *font_table;
  75
  76 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  77 Display          *xkb_dpy;
  78 int              xkb_event_base;
  79 int              mod_pressed = 0;
  80
  81 /* Because the statusline is the same on all outputs, we have
  82  * global buffer to render it on */
  83 xcb_gcontext_t   statusline_ctx;
  84 xcb_gcontext_t   statusline_clear;
  85 xcb_pixmap_t     statusline_pm;
  86 uint32_t         statusline_width;
  87
  88 /* Event-Watchers, to interact with the user */
  89 ev_prepare *xcb_prep;
  90 ev_check   *xcb_chk;
  91 ev_io      *xcb_io;
  92 ev_io      *xkb_io;
  93
  94 /* The parsed colors */
  95 struct xcb_colors_t {
  96     uint32_t bar_fg;
  97     uint32_t bar_bg;
  98     uint32_t active_ws_fg;
  99     uint32_t active_ws_bg;
 100     uint32_t inactive_ws_fg;
 101     uint32_t inactive_ws_bg;
 102     uint32_t urgent_ws_bg;
 103     uint32_t urgent_ws_fg;
 104     uint32_t focus_ws_bg;
 105     uint32_t focus_ws_fg;
 106 };
 107 struct xcb_colors_t colors;
 108
 109 /* We define xcb_request_failed as a macro to include the relevant line-number */
 110 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 111 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 112     xcb_generic_error_t *err;
 113     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 114         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 115         return err->error_code;
 116     }
 117     return 0;
 118 }
 119
 120 /*
 121  * Predicts the length of text based on cached data.
 122  * The string has to be encoded in ucs2 and glyph_len has to be the length
 123  * of the string (in glyphs).
 124  *
 125  */
 126 uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
 127     /* If we don't have per-character data, return the maximum width */
 128     if (font_table == NULL) {
 129         return (font_info->max_bounds.character_width * length);
 130     }
 131
 132     uint32_t width = 0;
 133     uint32_t i;
 134
 135     for (i = 0; i < length; i++) {
 136         xcb_charinfo_t *info;
 137         int row = text[i].byte1;
 138         int col = text[i].byte2;
 139
 140         if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
 141             col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2) {
 142             continue;
 143         }
 144
 145         /* Don't you ask me, how this one works… */
 146         info = &font_table[((row - font_info->min_byte1) *
 147                             (font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
 148                            (col - font_info->min_char_or_byte2)];
 149
 150         if (info->character_width != 0 ||
 151             (info->right_side_bearing |
 152              info->left_side_bearing |
 153              info->ascent |
 154              info->descent) != 0) {
 155             width += info->character_width;
 156         }
 157     }
 158
 159     return width;
 160 }
 161
 162 /*
 163  * Draws text given in UCS-2-encoding to a given drawable and position
 164  *
 165  */
 166 void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
 167                xcb_char2b_t *text, uint32_t glyph_count) {
 168     int offset = 0;
 169     int16_t pos_x = x;
 170     int16_t font_ascent = font_info->font_ascent;
 171
 172     while (glyph_count > 0) {
 173         uint8_t chunk_size = MIN(255, glyph_count);
 174         uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
 175
 176         xcb_image_text_16(xcb_connection,
 177                           chunk_size,
 178                           drawable,
 179                           ctx,
 180                           pos_x, y + font_ascent,
 181                           text + offset);
 182
 183         offset += chunk_size;
 184         pos_x += chunk_width;
 185         glyph_count -= chunk_size;
 186     }
 187 }
 188
 189 /*
 190  * Converts a colorstring to a colorpixel as expected from xcb_change_gc.
 191  * s is assumed to be in the format "rrggbb"
 192  *
 193  */
 194 uint32_t get_colorpixel(const char *s) {
 195     char strings[3][3] = { { s[0], s[1], '\0'} ,
 196                            { s[2], s[3], '\0'} ,
 197                            { s[4], s[5], '\0'} };
 198     uint8_t r = strtol(strings[0], NULL, 16);
 199     uint8_t g = strtol(strings[1], NULL, 16);
 200     uint8_t b = strtol(strings[2], NULL, 16);
 201     return (r << 16 | g << 8 | b);
 202 }
 203
 204 /*
 205  * Redraws the statusline to the buffer
 206  *
 207  */
 208 void refresh_statusline() {
 209     int glyph_count;
 210
 211     if (statusline == NULL) {
 212         return;
 213     }
 214
 215     xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
 216     statusline_width = predict_text_extents(text, glyph_count);
 217
 218     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
 219     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 220     draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
 221
 222     FREE(text);
 223 }
 224
 225 /*
 226  * Hides all bars (unmaps them)
 227  *
 228  */
 229 void hide_bars() {
 230     if (!config.hide_on_modifier) {
 231         return;
 232     }
 233
 234     i3_output *walk;
 235     SLIST_FOREACH(walk, outputs, slist) {
 236         if (!walk->active) {
 237             continue;
 238         }
 239         xcb_unmap_window(xcb_connection, walk->bar);
 240     }
 241     stop_child();
 242 }
 243
 244 /*
 245  * Unhides all bars (maps them)
 246  *
 247  */
 248 void unhide_bars() {
 249     if (!config.hide_on_modifier) {
 250         return;
 251     }
 252
 253     i3_output           *walk;
 254     xcb_void_cookie_t   cookie;
 255     uint32_t            mask;
 256     uint32_t            values[5];
 257
 258     cont_child();
 259
 260     SLIST_FOREACH(walk, outputs, slist) {
 261         if (walk->bar == XCB_NONE) {
 262             continue;
 263         }
 264         mask = XCB_CONFIG_WINDOW_X |
 265                XCB_CONFIG_WINDOW_Y |
 266                XCB_CONFIG_WINDOW_WIDTH |
 267                XCB_CONFIG_WINDOW_HEIGHT |
 268                XCB_CONFIG_WINDOW_STACK_MODE;
 269         values[0] = walk->rect.x;
 270         values[1] = walk->rect.y + walk->rect.h - font_height - 6;
 271         values[2] = walk->rect.w;
 272         values[3] = font_height + 6;
 273         values[4] = XCB_STACK_MODE_ABOVE;
 274         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 275         cookie = xcb_configure_window_checked(xcb_connection,
 276                                               walk->bar,
 277                                               mask,
 278                                               values);
 279
 280         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 281             exit(EXIT_FAILURE);
 282         }
 283         xcb_map_window(xcb_connection, walk->bar);
 284     }
 285 }
 286
 287 /*
 288  * Parse the colors into a format that we can use
 289  *
 290  */
 291 void init_colors(const struct xcb_color_strings_t *new_colors) {
 292 #define PARSE_COLOR(name, def) \
 293     do { \
 294         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 295     } while  (0)
 296     PARSE_COLOR(bar_fg, "FFFFFF");
 297     PARSE_COLOR(bar_bg, "000000");
 298     PARSE_COLOR(active_ws_fg, "FFFFFF");
 299     PARSE_COLOR(active_ws_bg, "480000");
 300     PARSE_COLOR(inactive_ws_fg, "FFFFFF");
 301     PARSE_COLOR(inactive_ws_bg, "240000");
 302     PARSE_COLOR(urgent_ws_fg, "FFFFFF");
 303     PARSE_COLOR(urgent_ws_bg, "002400");
 304     PARSE_COLOR(focus_ws_fg, "FFFFFF");
 305     PARSE_COLOR(focus_ws_bg, "480000");
 306 #undef PARSE_COLOR
 307 }
 308
 309 /*
 310  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 311  * We determine, whether the click occured on a ws-button or if the scroll-
 312  * wheel was used and change the workspace appropriately
 313  *
 314  */
 315 void handle_button(xcb_button_press_event_t *event) {
 316     i3_ws *cur_ws;
 317
 318     /* Determine, which bar was clicked */
 319     i3_output *walk;
 320     xcb_window_t bar = event->event;
 321     SLIST_FOREACH(walk, outputs, slist) {
 322         if (walk->bar == bar) {
 323             break;
 324         }
 325     }
 326
 327     if (walk == NULL) {
 328         DLOG("Unknown Bar klicked!\n");
 329         return;
 330     }
 331
 332     /* TODO: Move this to extern get_ws_for_output() */
 333     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 334         if (cur_ws->visible) {
 335             break;
 336         }
 337     }
 338
 339     if (cur_ws == NULL) {
 340         DLOG("No Workspace active?\n");
 341         return;
 342     }
 343
 344     int32_t x = event->event_x;
 345
 346     DLOG("Got Button %d\n", event->detail);
 347
 348     switch (event->detail) {
 349         case 1:
 350             /* Left Mousbutton. We determine, which button was clicked
 351              * and set cur_ws accordingly */
 352             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 353                 DLOG("x = %d\n", x);
 354                 if (x < cur_ws->name_width + 10) {
 355                     break;
 356                 }
 357                 x -= cur_ws->name_width + 10;
 358             }
 359             if (cur_ws == NULL) {
 360                 return;
 361             }
 362             break;
 363         case 4:
 364             /* Mouse wheel down. We select the next ws */
 365             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 366                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 367             } else {
 368                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 369             }
 370             break;
 371         case 5:
 372             /* Mouse wheel up. We select the previos ws */
 373             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 374                 cur_ws = TAILQ_FIRST(walk->workspaces);
 375             } else {
 376                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 377             }
 378             break;
 379     }
 380
 381     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 382     char buffer[len];
 383     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 384     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 385 }
 386
 387 /*
 388  * Configures the x coordinate of all trayclients. To be called after adding a
 389  * new tray client or removing an old one.
 390  *
 391  */
 392 static void configure_trayclients() {
 393     trayclient *trayclient;
 394     i3_output *output;
 395     SLIST_FOREACH(output, outputs, slist) {
 396         if (!output->active)
 397             continue;
 398
 399         int clients = 0;
 400         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 401             clients++;
 402
 403             DLOG("Configuring tray window %08x to x=%d\n",
 404                  trayclient->win, output->rect.w - (clients * (font_height + 2)));
 405             uint32_t x = output->rect.w - (clients * (font_height + 2));
 406             xcb_configure_window(xcb_connection,
 407                                  trayclient->win,
 408                                  XCB_CONFIG_WINDOW_X,
 409                                  &x);
 410         }
 411     }
 412 }
 413
 414 void handle_client_message(xcb_client_message_event_t* event) {
 415     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 416         event->format == 32) {
 417         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 418         /* event->data.data32[0] is the timestamp */
 419         uint32_t op = event->data.data32[1];
 420         uint32_t mask;
 421         uint32_t values[2];
 422         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 423             xcb_window_t client = event->data.data32[2];
 424
 425             /* Listen for PropertyNotify events to get the most recent value of
 426              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 427             mask = XCB_CW_EVENT_MASK;
 428             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 429                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 430             xcb_change_window_attributes(xcb_connection,
 431                                          client,
 432                                          mask,
 433                                          values);
 434
 435             /* Request the _XEMBED_INFO property. The XEMBED specification
 436              * (which is referred by the tray specification) says this *has* to
 437              * be set, but VLC does not set it… */
 438             bool map_it = true;
 439             int xe_version = 1;
 440             xcb_get_property_cookie_t xembedc;
 441             xembedc = xcb_get_property_unchecked(xcb_connection,
 442                                                  0,
 443                                                  client,
 444                                                  atoms[_XEMBED_INFO],
 445                                                  XCB_GET_PROPERTY_TYPE_ANY,
 446                                                  0,
 447                                                  2 * 32);
 448
 449             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 450                                                                        xembedc,
 451                                                                        NULL);
 452             if (xembedr != NULL && xembedr->length != 0) {
 453                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 454                 uint32_t *xembed = xcb_get_property_value(xembedr);
 455                 DLOG("xembed version = %d\n", xembed[0]);
 456                 DLOG("xembed flags = %d\n", xembed[1]);
 457                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 458                 xe_version = xembed[0];
 459                 if (xe_version > 1)
 460                     xe_version = 1;
 461                 free(xembedr);
 462             } else {
 463                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 464             }
 465
 466             DLOG("X window %08x requested docking\n", client);
 467             i3_output *walk, *output;
 468             SLIST_FOREACH(walk, outputs, slist) {
 469                 if (!walk->active)
 470                     continue;
 471                 DLOG("using output %s\n", walk->name);
 472                 output = walk;
 473             }
 474             xcb_reparent_window(xcb_connection,
 475                                 client,
 476                                 output->bar,
 477                                 output->rect.w - font_height - 2, /* TODO: why -2? */
 478                                 2);
 479             /* We reconfigure the window to use a reasonable size. The systray
 480              * specification explicitly says:
 481              *   Tray icons may be assigned any size by the system tray, and
 482              *   should do their best to cope with any size effectively
 483              */
 484             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 485             values[0] = font_height;
 486             values[1] = font_height;
 487             xcb_configure_window(xcb_connection,
 488                                  client,
 489                                  mask,
 490                                  values);
 491
 492             /* send the XEMBED_EMBEDDED_NOTIFY message */
 493             void *event = calloc(32, 1);
 494             xcb_client_message_event_t *ev = event;
 495             ev->response_type = XCB_CLIENT_MESSAGE;
 496             ev->window = client;
 497             ev->type = atoms[_XEMBED];
 498             ev->format = 32;
 499             ev->data.data32[0] = XCB_CURRENT_TIME;
 500             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 501             ev->data.data32[2] = output->bar;
 502             ev->data.data32[3] = xe_version;
 503             xcb_send_event(xcb_connection,
 504                            0,
 505                            client,
 506                            XCB_EVENT_MASK_NO_EVENT,
 507                            (char*)ev);
 508             free(event);
 509
 510             if (map_it) {
 511                 DLOG("Mapping dock client\n");
 512                 xcb_map_window(xcb_connection, client);
 513             } else {
 514                 DLOG("Not mapping dock client yet\n");
 515             }
 516             trayclient *tc = malloc(sizeof(trayclient));
 517             tc->win = client;
 518             tc->mapped = map_it;
 519             tc->xe_version = xe_version;
 520             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 521
 522             /* Trigger an update to copy the statusline text to the appropriate
 523              * position */
 524             configure_trayclients();
 525             draw_bars();
 526         }
 527     }
 528 }
 529
 530 void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 531     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 532
 533     i3_output *walk;
 534     SLIST_FOREACH(walk, outputs, slist) {
 535         if (!walk->active)
 536             continue;
 537         DLOG("checking output %s\n", walk->name);
 538         trayclient *trayclient;
 539         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 540             if (trayclient->win != event->window)
 541                 continue;
 542
 543             DLOG("Removing tray client with window ID %08x\n", event->window);
 544             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 545
 546             /* Trigger an update, we now have more space for the statusline */
 547             configure_trayclients();
 548             draw_bars();
 549             return;
 550         }
 551     }
 552 }
 553
 554 static void handle_property_notify(xcb_property_notify_event_t *event) {
 555     DLOG("PropertyNotify\n");
 556     if (event->atom == atoms[_XEMBED_INFO] &&
 557         event->state == XCB_PROPERTY_NEW_VALUE) {
 558         DLOG("xembed_info updated\n");
 559         trayclient *trayclient = NULL, *walk;
 560         i3_output *o_walk;
 561         SLIST_FOREACH(o_walk, outputs, slist) {
 562             if (!o_walk->active)
 563                 continue;
 564
 565             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 566                 if (walk->win != event->window)
 567                     continue;
 568                 trayclient = walk;
 569                 break;
 570             }
 571
 572             if (trayclient)
 573                 break;
 574         }
 575         if (!trayclient) {
 576             ELOG("PropertyNotify received for unknown window %08x\n",
 577                  event->window);
 578             return;
 579         }
 580         xcb_get_property_cookie_t xembedc;
 581         xembedc = xcb_get_property_unchecked(xcb_connection,
 582                                              0,
 583                                              trayclient->win,
 584                                              atoms[_XEMBED_INFO],
 585                                              XCB_GET_PROPERTY_TYPE_ANY,
 586                                              0,
 587                                              2 * 32);
 588
 589         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 590                                                                    xembedc,
 591                                                                    NULL);
 592         if (xembedr == NULL || xembedr->length == 0)
 593             return;
 594
 595         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 596         uint32_t *xembed = xcb_get_property_value(xembedr);
 597         DLOG("xembed version = %d\n", xembed[0]);
 598         DLOG("xembed flags = %d\n", xembed[1]);
 599         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 600         DLOG("map-state now %d\n", map_it);
 601         if (trayclient->mapped && !map_it) {
 602             /* need to unmap the window */
 603             xcb_unmap_window(xcb_connection, trayclient->win);
 604             trayclient->mapped = map_it;
 605             draw_bars();
 606         } else if (!trayclient->mapped && map_it) {
 607             /* need to map the window */
 608             xcb_map_window(xcb_connection, trayclient->win);
 609             trayclient->mapped = map_it;
 610             draw_bars();
 611         }
 612         free(xembedr);
 613     }
 614 }
 615
 616 /*
 617  * This function is called immediately before the main loop locks. We flush xcb
 618  * then (and only then)
 619  *
 620  */
 621 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 622     xcb_flush(xcb_connection);
 623 }
 624
 625 /*
 626  * This function is called immediately after the main loop locks, so when one
 627  * of the watchers registered an event.
 628  * We check whether an X-Event arrived and handle it.
 629  *
 630  */
 631 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 632     xcb_generic_event_t *event;
 633     while ((event = xcb_poll_for_event(xcb_connection)) == NULL) {
 634         return;
 635     }
 636
 637     switch (event->response_type & ~0x80) {
 638         case XCB_EXPOSE:
 639             /* Expose-events happen, when the window needs to be redrawn */
 640             redraw_bars();
 641             break;
 642         case XCB_BUTTON_PRESS:
 643             /* Button-press-events are mouse-buttons clicked on one of our bars */
 644             handle_button((xcb_button_press_event_t*) event);
 645             break;
 646         case XCB_CLIENT_MESSAGE:
 647             /* Client messages are used for client-to-client communication, for
 648              * example system tray widgets talk to us directly via client messages. */
 649             handle_client_message((xcb_client_message_event_t*) event);
 650             break;
 651         case XCB_UNMAP_NOTIFY:
 652             /* UnmapNotifies are received when a tray window unmaps itself */
 653             handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 654             break;
 655         case XCB_PROPERTY_NOTIFY:
 656             /* PropertyNotify */
 657             handle_property_notify((xcb_property_notify_event_t*) event);
 658             break;
 659     }
 660     FREE(event);
 661 }
 662
 663 /*
 664  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 665  * are triggered
 666  *
 667  */
 668 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 669 }
 670
 671 /*
 672  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 673  *
 674  */
 675 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 676     XkbEvent ev;
 677     int modstate = 0;
 678
 679     DLOG("Got XKB-Event!\n");
 680
 681     while (XPending(xkb_dpy)) {
 682         XNextEvent(xkb_dpy, (XEvent*)&ev);
 683
 684         if (ev.type != xkb_event_base) {
 685             ELOG("No Xkb-Event!\n");
 686             continue;
 687         }
 688
 689         if (ev.any.xkb_type != XkbStateNotify) {
 690             ELOG("No State Notify!\n");
 691             continue;
 692         }
 693
 694         unsigned int mods = ev.state.mods;
 695         modstate = mods & Mod4Mask;
 696     }
 697
 698     if (modstate != mod_pressed) {
 699         if (modstate == 0) {
 700             DLOG("Mod4 got released!\n");
 701             hide_bars();
 702         } else {
 703             DLOG("Mod4 got pressed!\n");
 704             unhide_bars();
 705         }
 706         mod_pressed = modstate;
 707     }
 708 }
 709
 710 /*
 711  * Initialize xcb and use the specified fontname for text-rendering
 712  *
 713  */
 714 char *init_xcb(char *fontname) {
 715     /* FIXME: xcb_connect leaks Memory */
 716     xcb_connection = xcb_connect(NULL, &screen);
 717     if (xcb_connection_has_error(xcb_connection)) {
 718         ELOG("Cannot open display\n");
 719         exit(EXIT_FAILURE);
 720     }
 721     DLOG("Connected to xcb\n");
 722
 723     /* We have to request the atoms we need */
 724     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 725     #include "xcb_atoms.def"
 726
 727     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 728     xcb_root = xcb_screen->root;
 729
 730     /* We load and allocate the font */
 731     xcb_font = xcb_generate_id(xcb_connection);
 732     xcb_void_cookie_t open_font_cookie;
 733     open_font_cookie = xcb_open_font_checked(xcb_connection,
 734                                              xcb_font,
 735                                              strlen(fontname),
 736                                              fontname);
 737
 738     /* We need to save info about the font, because we need the font's height and
 739      * information about the width of characters */
 740     xcb_query_font_cookie_t query_font_cookie;
 741     query_font_cookie = xcb_query_font(xcb_connection,
 742                                        xcb_font);
 743
 744     /* To grab modifiers without blocking other applications from receiving key-events
 745      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 746      * in xcb */
 747     if (config.hide_on_modifier) {
 748         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 749         xkb_major = XkbMajorVersion;
 750         xkb_minor = XkbMinorVersion;
 751
 752         xkb_dpy = XkbOpenDisplay(NULL,
 753                                  &xkb_event_base,
 754                                  &xkb_errbase,
 755                                  &xkb_major,
 756                                  &xkb_minor,
 757                                  &xkb_err);
 758
 759         if (xkb_dpy == NULL) {
 760             ELOG("No XKB!\n");
 761             exit(EXIT_FAILURE);
 762         }
 763
 764         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 765             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 766             exit(EXIT_FAILURE);
 767         }
 768
 769         int i1;
 770         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 771             ELOG("XKB not supported by X-server!\n");
 772             exit(EXIT_FAILURE);
 773         }
 774
 775         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 776             ELOG("Could not grab Key!\n");
 777             exit(EXIT_FAILURE);
 778         }
 779
 780         xkb_io = malloc(sizeof(ev_io));
 781         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 782         ev_io_start(main_loop, xkb_io);
 783         XFlush(xkb_dpy);
 784     }
 785
 786     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 787      * this way, we can choose to crop it */
 788     uint32_t mask = XCB_GC_FOREGROUND;
 789     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
 790
 791     statusline_clear = xcb_generate_id(xcb_connection);
 792     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 793                                                                statusline_clear,
 794                                                                xcb_root,
 795                                                                mask,
 796                                                                vals);
 797
 798     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
 799     vals[0] = colors.bar_fg;
 800     statusline_ctx = xcb_generate_id(xcb_connection);
 801     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 802                                                             statusline_ctx,
 803                                                             xcb_root,
 804                                                             mask,
 805                                                             vals);
 806
 807     statusline_pm = xcb_generate_id(xcb_connection);
 808     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 809                                                                xcb_screen->root_depth,
 810                                                                statusline_pm,
 811                                                                xcb_root,
 812                                                                xcb_screen->width_in_pixels,
 813                                                                xcb_screen->height_in_pixels);
 814
 815
 816     /* The various Watchers to communicate with xcb */
 817     xcb_io = malloc(sizeof(ev_io));
 818     xcb_prep = malloc(sizeof(ev_prepare));
 819     xcb_chk = malloc(sizeof(ev_check));
 820
 821     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 822     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 823     ev_check_init(xcb_chk, &xcb_chk_cb);
 824
 825     ev_io_start(main_loop, xcb_io);
 826     ev_prepare_start(main_loop, xcb_prep);
 827     ev_check_start(main_loop, xcb_chk);
 828
 829     /* Now we get the atoms and save them in a nice data structure */
 830     get_atoms();
 831
 832     xcb_get_property_cookie_t path_cookie;
 833     path_cookie = xcb_get_property_unchecked(xcb_connection,
 834                                    0,
 835                                    xcb_root,
 836                                    atoms[I3_SOCKET_PATH],
 837                                    XCB_GET_PROPERTY_TYPE_ANY,
 838                                    0, PATH_MAX);
 839
 840     /* We check, if i3 set its socket-path */
 841     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 842                                                                   path_cookie,
 843                                                                   NULL);
 844     char *path = NULL;
 845     if (path_reply) {
 846         int len = xcb_get_property_value_length(path_reply);
 847         if (len != 0) {
 848             path = strndup(xcb_get_property_value(path_reply), len);
 849         }
 850     }
 851
 852     /* Now we save the font-infos */
 853     font_info = xcb_query_font_reply(xcb_connection,
 854                                      query_font_cookie,
 855                                      NULL);
 856
 857     if (xcb_request_failed(open_font_cookie, "Could not open font")) {
 858         exit(EXIT_FAILURE);
 859     }
 860
 861     font_height = font_info->font_ascent + font_info->font_descent;
 862
 863     if (xcb_query_font_char_infos_length(font_info) == 0) {
 864         font_table = NULL;
 865     } else {
 866         font_table = xcb_query_font_char_infos(font_info);
 867     }
 868
 869     DLOG("Calculated Font-height: %d\n", font_height);
 870
 871     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 872         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 873         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 874         exit(EXIT_FAILURE);
 875     }
 876
 877     return path;
 878 }
 879
 880 void init_tray() {
 881     /* request the tray manager atom for the X11 display we are running on */
 882     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 883     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 884     xcb_intern_atom_cookie_t tray_cookie;
 885     xcb_intern_atom_reply_t *tray_reply;
 886     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 887
 888     /* tray support: we need a window to own the selection */
 889     xcb_void_cookie_t selwin_cookie;
 890     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 891     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 892     uint32_t selval[] = { 1 };
 893     selwin_cookie = xcb_create_window_checked(xcb_connection,
 894                                               xcb_screen->root_depth,
 895                                               selwin,
 896                                               xcb_root,
 897                                               -1, -1,
 898                                               1, 1,
 899                                               1,
 900                                               XCB_WINDOW_CLASS_INPUT_OUTPUT,
 901                                               xcb_screen->root_visual,
 902                                               selmask,
 903                                               selval);
 904
 905     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 906     /* set the atoms */
 907     xcb_change_property(xcb_connection,
 908                         XCB_PROP_MODE_REPLACE,
 909                         selwin,
 910                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 911                         atoms[CARDINAL],
 912                         32,
 913                         1,
 914                         &orientation);
 915
 916     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 917         ELOG("Could not get atom %s\n", atomname);
 918         exit(EXIT_FAILURE);
 919     }
 920
 921     xcb_set_selection_owner(xcb_connection,
 922                             selwin,
 923                             tray_reply->atom,
 924                             XCB_CURRENT_TIME);
 925
 926     /* TODO: check if we got the selection */
 927     void *event = calloc(32, 1);
 928     xcb_client_message_event_t *ev = event;
 929     ev->response_type = XCB_CLIENT_MESSAGE;
 930     ev->window = xcb_root;
 931     ev->type = atoms[MANAGER];
 932     ev->format = 32;
 933     ev->data.data32[0] = XCB_CURRENT_TIME;
 934     ev->data.data32[1] = tray_reply->atom;
 935     ev->data.data32[2] = selwin;
 936     xcb_send_event(xcb_connection,
 937                    0,
 938                    xcb_root,
 939                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 940                    (char*)ev);
 941     free(event);
 942     free(tray_reply);
 943 }
 944
 945 /*
 946  * Cleanup the xcb-stuff.
 947  * Called once, before the program terminates.
 948  *
 949  */
 950 void clean_xcb() {
 951     i3_output *o_walk;
 952     free_workspaces();
 953     SLIST_FOREACH(o_walk, outputs, slist) {
 954         destroy_window(o_walk);
 955         FREE(o_walk->workspaces);
 956         FREE(o_walk->name);
 957     }
 958     FREE_SLIST(outputs, i3_output);
 959     FREE(outputs);
 960
 961     xcb_disconnect(xcb_connection);
 962
 963     ev_check_stop(main_loop, xcb_chk);
 964     ev_prepare_stop(main_loop, xcb_prep);
 965     ev_io_stop(main_loop, xcb_io);
 966
 967     FREE(xcb_chk);
 968     FREE(xcb_prep);
 969     FREE(xcb_io);
 970     FREE(font_info);
 971 }
 972
 973 /*
 974  * Get the earlier requested atoms and save them in the prepared data structure
 975  *
 976  */
 977 void get_atoms() {
 978     xcb_intern_atom_reply_t *reply;
 979     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
 980         if (reply == NULL) { \
 981             ELOG("Could not get atom %s\n", #name); \
 982             exit(EXIT_FAILURE); \
 983         } \
 984         atoms[name] = reply->atom; \
 985         free(reply);
 986
 987     #include "xcb_atoms.def"
 988     DLOG("Got Atoms\n");
 989 }
 990
 991 /*
 992  * Destroy the bar of the specified output
 993  *
 994  */
 995 void destroy_window(i3_output *output) {
 996     if (output == NULL) {
 997         return;
 998     }
 999     if (output->bar == XCB_NONE) {
1000         return;
1001     }
1002     xcb_destroy_window(xcb_connection, output->bar);
1003     output->bar = XCB_NONE;
1004 }
1005
1006 /*
1007  * Reallocate the statusline-buffer
1008  *
1009  */
1010 void realloc_sl_buffer() {
1011     xcb_free_pixmap(xcb_connection, statusline_pm);
1012     statusline_pm = xcb_generate_id(xcb_connection);
1013     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1014                                                                xcb_screen->root_depth,
1015                                                                statusline_pm,
1016                                                                xcb_root,
1017                                                                xcb_screen->width_in_pixels,
1018                                                                xcb_screen->height_in_pixels);
1019
1020     uint32_t mask = XCB_GC_FOREGROUND;
1021     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
1022     xcb_free_gc(xcb_connection, statusline_clear);
1023     statusline_clear = xcb_generate_id(xcb_connection);
1024     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1025                                                                statusline_clear,
1026                                                                xcb_root,
1027                                                                mask,
1028                                                                vals);
1029
1030     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
1031     vals[0] = colors.bar_fg;
1032     statusline_ctx = xcb_generate_id(xcb_connection);
1033     xcb_free_gc(xcb_connection, statusline_ctx);
1034     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1035                                                             statusline_ctx,
1036                                                             xcb_root,
1037                                                             mask,
1038                                                             vals);
1039
1040     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1041         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1042         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1043         exit(EXIT_FAILURE);
1044     }
1045
1046 }
1047
1048 /*
1049  * Reconfigure all bars and create new bars for recently activated outputs
1050  *
1051  */
1052 void reconfig_windows() {
1053     uint32_t mask;
1054     uint32_t values[5];
1055
1056     i3_output *walk;
1057     SLIST_FOREACH(walk, outputs, slist) {
1058         if (!walk->active) {
1059             /* If an output is not active, we destroy its bar */
1060             /* FIXME: Maybe we rather want to unmap? */
1061             DLOG("Destroying window for output %s\n", walk->name);
1062             destroy_window(walk);
1063             continue;
1064         }
1065         if (walk->bar == XCB_NONE) {
1066             DLOG("Creating Window for output %s\n", walk->name);
1067
1068             /* TODO: only call init_tray() if the tray is configured for this output */
1069             init_tray();
1070
1071             walk->bar = xcb_generate_id(xcb_connection);
1072             walk->buffer = xcb_generate_id(xcb_connection);
1073             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1074             /* Black background */
1075             values[0] = colors.bar_bg;
1076             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1077             values[1] = config.hide_on_modifier;
1078             /* The events we want to receive */
1079             values[2] = XCB_EVENT_MASK_EXPOSURE;
1080             if (!config.disable_ws) {
1081                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1082             }
1083             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1084                                                                      xcb_screen->root_depth,
1085                                                                      walk->bar,
1086                                                                      xcb_root,
1087                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
1088                                                                      walk->rect.w, font_height + 6,
1089                                                                      1,
1090                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1091                                                                      xcb_screen->root_visual,
1092                                                                      mask,
1093                                                                      values);
1094
1095             /* The double-buffer we use to render stuff off-screen */
1096             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1097                                                                     xcb_screen->root_depth,
1098                                                                     walk->buffer,
1099                                                                     walk->bar,
1100                                                                     walk->rect.w,
1101                                                                     walk->rect.h);
1102
1103             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1104              * this one */
1105             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1106                                                                 XCB_PROP_MODE_REPLACE,
1107                                                                 walk->bar,
1108                                                                 atoms[_NET_WM_WINDOW_TYPE],
1109                                                                 XCB_ATOM_ATOM,
1110                                                                 32,
1111                                                                 1,
1112                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1113
1114             /* We need to tell i3, where to reserve space for i3bar */
1115             /* left, right, top, bottom, left_start_y, left_end_y,
1116              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1117              * bottom_end_x */
1118             /* A local struct to save the strut_partial property */
1119             struct {
1120                 uint32_t left;
1121                 uint32_t right;
1122                 uint32_t top;
1123                 uint32_t bottom;
1124                 uint32_t left_start_y;
1125                 uint32_t left_end_y;
1126                 uint32_t right_start_y;
1127                 uint32_t right_end_y;
1128                 uint32_t top_start_x;
1129                 uint32_t top_end_x;
1130                 uint32_t bottom_start_x;
1131                 uint32_t bottom_end_x;
1132             } __attribute__((__packed__)) strut_partial = {0,};
1133             switch (config.dockpos) {
1134                 case DOCKPOS_NONE:
1135                     break;
1136                 case DOCKPOS_TOP:
1137                     strut_partial.top = font_height + 6;
1138                     strut_partial.top_start_x = walk->rect.x;
1139                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1140                     break;
1141                 case DOCKPOS_BOT:
1142                     strut_partial.bottom = font_height + 6;
1143                     strut_partial.bottom_start_x = walk->rect.x;
1144                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1145                     break;
1146             }
1147             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1148                                                                  XCB_PROP_MODE_REPLACE,
1149                                                                  walk->bar,
1150                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1151                                                                  XCB_ATOM_CARDINAL,
1152                                                                  32,
1153                                                                  12,
1154                                                                  &strut_partial);
1155
1156             /* We also want a graphics-context for the bars (it defines the properties
1157              * with which we draw to them) */
1158             walk->bargc = xcb_generate_id(xcb_connection);
1159             mask = XCB_GC_FONT;
1160             values[0] = xcb_font;
1161             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1162                                                                 walk->bargc,
1163                                                                 walk->bar,
1164                                                                 mask,
1165                                                                 values);
1166
1167             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1168             xcb_void_cookie_t map_cookie;
1169             if (!config.hide_on_modifier) {
1170                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1171             }
1172
1173             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1174                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1175                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1176                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1177                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1178                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1179                 exit(EXIT_FAILURE);
1180             }
1181         } else {
1182             /* We already have a bar, so we just reconfigure it */
1183             mask = XCB_CONFIG_WINDOW_X |
1184                    XCB_CONFIG_WINDOW_Y |
1185                    XCB_CONFIG_WINDOW_WIDTH |
1186                    XCB_CONFIG_WINDOW_HEIGHT |
1187                    XCB_CONFIG_WINDOW_STACK_MODE;
1188             values[0] = walk->rect.x;
1189             values[1] = walk->rect.y + walk->rect.h - font_height - 6;
1190             values[2] = walk->rect.w;
1191             values[3] = font_height + 6;
1192             values[4] = XCB_STACK_MODE_ABOVE;
1193
1194             DLOG("Destroying buffer for output %s", walk->name);
1195             xcb_free_pixmap(xcb_connection, walk->buffer);
1196
1197             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1198             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1199                                                                         walk->bar,
1200                                                                         mask,
1201                                                                         values);
1202
1203             DLOG("Recreating buffer for output %s", walk->name);
1204             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1205                                                                     xcb_screen->root_depth,
1206                                                                     walk->buffer,
1207                                                                     walk->bar,
1208                                                                     walk->rect.w,
1209                                                                     walk->rect.h);
1210
1211             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1212                 exit(EXIT_FAILURE);
1213             }
1214             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1215                 exit(EXIT_FAILURE);
1216             }
1217         }
1218     }
1219 }
1220
1221 /*
1222  * Render the bars, with buttons and statusline
1223  *
1224  */
1225 void draw_bars() {
1226     DLOG("Drawing Bars...\n");
1227     int i = 0;
1228
1229     refresh_statusline();
1230
1231     i3_output *outputs_walk;
1232     SLIST_FOREACH(outputs_walk, outputs, slist) {
1233         if (!outputs_walk->active) {
1234             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1235             continue;
1236         }
1237         if (outputs_walk->bar == XCB_NONE) {
1238             /* Oh shit, an active output without an own bar. Create it now! */
1239             reconfig_windows();
1240         }
1241         /* First things first: clear the backbuffer */
1242         uint32_t color = colors.bar_bg;
1243         xcb_change_gc(xcb_connection,
1244                       outputs_walk->bargc,
1245                       XCB_GC_FOREGROUND,
1246                       &color);
1247         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
1248         xcb_poly_fill_rectangle(xcb_connection,
1249                                 outputs_walk->buffer,
1250                                 outputs_walk->bargc,
1251                                 1,
1252                                 &rect);
1253
1254         if (statusline != NULL) {
1255             DLOG("Printing statusline!\n");
1256
1257             /* Luckily we already prepared a seperate pixmap containing the rendered
1258              * statusline, we just have to copy the relevant parts to the relevant
1259              * position */
1260             trayclient *trayclient;
1261             int traypx = 0;
1262             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1263                 if (!trayclient->mapped)
1264                     continue;
1265                 /* We assume the tray icons are quadratic (we use the font
1266                  * *height* as *width* of the icons) because we configured them
1267                  * like this. */
1268                 traypx += font_height;
1269             }
1270             /* Add 2px of padding if there are any tray icons */
1271             if (traypx > 0)
1272                 traypx += 2;
1273             xcb_copy_area(xcb_connection,
1274                           statusline_pm,
1275                           outputs_walk->buffer,
1276                           outputs_walk->bargc,
1277                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1278                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1279                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
1280         }
1281
1282         if (config.disable_ws) {
1283             continue;
1284         }
1285
1286         i3_ws *ws_walk;
1287         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1288             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1289             uint32_t fg_color = colors.inactive_ws_fg;
1290             uint32_t bg_color = colors.inactive_ws_bg;
1291             if (ws_walk->visible) {
1292                 if (!ws_walk->focused) {
1293                     fg_color = colors.active_ws_fg;
1294                     bg_color = colors.active_ws_bg;
1295                 } else {
1296                     fg_color = colors.focus_ws_fg;
1297                     bg_color = colors.focus_ws_bg;
1298                 }
1299             }
1300             if (ws_walk->urgent) {
1301                 DLOG("WS %s is urgent!\n", ws_walk->name);
1302                 fg_color = colors.urgent_ws_fg;
1303                 bg_color = colors.urgent_ws_bg;
1304                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1305                 unhide_bars();
1306             }
1307             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1308             uint32_t vals[] = { bg_color, bg_color };
1309             xcb_change_gc(xcb_connection,
1310                           outputs_walk->bargc,
1311                           mask,
1312                           vals);
1313             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
1314             xcb_poly_fill_rectangle(xcb_connection,
1315                                     outputs_walk->buffer,
1316                                     outputs_walk->bargc,
1317                                     1,
1318                                     &rect);
1319             xcb_change_gc(xcb_connection,
1320                           outputs_walk->bargc,
1321                           XCB_GC_FOREGROUND,
1322                           &fg_color);
1323             xcb_image_text_16(xcb_connection,
1324                               ws_walk->name_glyphs,
1325                               outputs_walk->buffer,
1326                               outputs_walk->bargc,
1327                               i + 5, font_info->font_ascent + 2,
1328                               ws_walk->ucs2_name);
1329             i += 10 + ws_walk->name_width;
1330         }
1331
1332         i = 0;
1333     }
1334
1335     redraw_bars();
1336 }
1337
1338 /*
1339  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1340  *
1341  */
1342 void redraw_bars() {
1343     i3_output *outputs_walk;
1344     SLIST_FOREACH(outputs_walk, outputs, slist) {
1345         if (!outputs_walk->active) {
1346             continue;
1347         }
1348         xcb_copy_area(xcb_connection,
1349                       outputs_walk->buffer,
1350                       outputs_walk->bar,
1351                       outputs_walk->bargc,
1352                       0, 0,
1353                       0, 0,
1354                       outputs_walk->rect.w,
1355                       outputs_walk->rect.h);
1356         xcb_flush(xcb_connection);
1357     }
1358 }