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  * © 2010-2012 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_aux.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 *root_screen;
  50 xcb_window_t xcb_root;
  51
  52 /* selection window for tray support */
  53 static xcb_window_t selwin = XCB_NONE;
  54 static xcb_intern_atom_reply_t *tray_reply = NULL;
  55
  56 /* This is needed for integration with libi3 */
  57 xcb_connection_t *conn;
  58
  59 /* The font we'll use */
  60 static i3Font font;
  61
  62 /* Overall height of the bar (based on font size) */
  63 int bar_height;
  64
  65 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  66 Display *xkb_dpy;
  67 int xkb_event_base;
  68 int mod_pressed = 0;
  69
  70 /* Because the statusline is the same on all outputs, we have
  71  * global buffer to render it on */
  72 xcb_gcontext_t statusline_ctx;
  73 xcb_gcontext_t statusline_clear;
  74 xcb_pixmap_t statusline_pm;
  75 uint32_t statusline_width;
  76
  77 /* Event-Watchers, to interact with the user */
  78 ev_prepare *xcb_prep;
  79 ev_check *xcb_chk;
  80 ev_io *xcb_io;
  81 ev_io *xkb_io;
  82
  83 /* The name of current binding mode */
  84 static mode binding;
  85
  86 /* Indicates whether a new binding mode was recently activated */
  87 bool activated_mode = false;
  88
  89 /* The parsed colors */
  90 struct xcb_colors_t {
  91     uint32_t bar_fg;
  92     uint32_t bar_bg;
  93     uint32_t sep_fg;
  94     uint32_t active_ws_fg;
  95     uint32_t active_ws_bg;
  96     uint32_t active_ws_border;
  97     uint32_t inactive_ws_fg;
  98     uint32_t inactive_ws_bg;
  99     uint32_t inactive_ws_border;
 100     uint32_t urgent_ws_bg;
 101     uint32_t urgent_ws_fg;
 102     uint32_t urgent_ws_border;
 103     uint32_t focus_ws_bg;
 104     uint32_t focus_ws_fg;
 105     uint32_t focus_ws_border;
 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  * Redraws the statusline to the buffer
 122  *
 123  */
 124 void refresh_statusline(void) {
 125     struct status_block *block;
 126
 127     uint32_t old_statusline_width = statusline_width;
 128     statusline_width = 0;
 129
 130     /* Predict the text width of all blocks (in pixels). */
 131     TAILQ_FOREACH (block, &statusline_head, blocks) {
 132         if (i3string_get_num_bytes(block->full_text) == 0)
 133             continue;
 134
 135         block->width = predict_text_width(block->full_text);
 136
 137         /* Compute offset and append for text aligment in min_width. */
 138         if (block->min_width <= block->width) {
 139             block->x_offset = 0;
 140             block->x_append = 0;
 141         } else {
 142             uint32_t padding_width = block->min_width - block->width;
 143             switch (block->align) {
 144                 case ALIGN_LEFT:
 145                     block->x_append = padding_width;
 146                     break;
 147                 case ALIGN_RIGHT:
 148                     block->x_offset = padding_width;
 149                     break;
 150                 case ALIGN_CENTER:
 151                     block->x_offset = padding_width / logical_px(2);
 152                     block->x_append = padding_width / logical_px(2) + padding_width % logical_px(2);
 153                     break;
 154             }
 155         }
 156
 157         /* If this is not the last block, add some pixels for a separator. */
 158         if (TAILQ_NEXT(block, blocks) != NULL)
 159             block->width += block->sep_block_width;
 160
 161         statusline_width += block->width + block->x_offset + block->x_append;
 162     }
 163
 164     /* If the statusline is bigger than our screen we need to make sure that
 165      * the pixmap provides enough space, so re-allocate if the width grew */
 166     if (statusline_width > root_screen->width_in_pixels &&
 167         statusline_width > old_statusline_width)
 168         realloc_sl_buffer();
 169
 170     /* Clear the statusline pixmap. */
 171     xcb_rectangle_t rect = {0, 0, root_screen->width_in_pixels, font.height + logical_px(5)};
 172     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 173
 174     /* Draw the text of each block. */
 175     uint32_t x = 0;
 176     TAILQ_FOREACH (block, &statusline_head, blocks) {
 177         if (i3string_get_num_bytes(block->full_text) == 0)
 178             continue;
 179
 180         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 181         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 182         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, 1, block->width);
 183         x += block->width + block->x_offset + block->x_append;
 184
 185         if (TAILQ_NEXT(block, blocks) != NULL && !block->no_separator && block->sep_block_width > 0) {
 186             /* This is not the last block, draw a separator. */
 187             uint32_t sep_offset = block->sep_block_width / 2 + block->sep_block_width % 2;
 188             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_LINE_WIDTH;
 189             uint32_t values[] = {colors.sep_fg, colors.bar_bg, logical_px(1)};
 190             xcb_change_gc(xcb_connection, statusline_ctx, mask, values);
 191             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 192                           statusline_ctx, 2,
 193                           (xcb_point_t[]) {{x - sep_offset, 2},
 194                                            {x - sep_offset, font.height - 2}});
 195         }
 196     }
 197 }
 198
 199 /*
 200  * Hides all bars (unmaps them)
 201  *
 202  */
 203 void hide_bars(void) {
 204     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 205         return;
 206     }
 207
 208     i3_output *walk;
 209     SLIST_FOREACH (walk, outputs, slist) {
 210         if (!walk->active) {
 211             continue;
 212         }
 213         xcb_unmap_window(xcb_connection, walk->bar);
 214     }
 215     stop_child();
 216 }
 217
 218 /*
 219  * Unhides all bars (maps them)
 220  *
 221  */
 222 void unhide_bars(void) {
 223     if (config.hide_on_modifier != M_HIDE) {
 224         return;
 225     }
 226
 227     i3_output *walk;
 228     xcb_void_cookie_t cookie;
 229     uint32_t mask;
 230     uint32_t values[5];
 231
 232     cont_child();
 233
 234     SLIST_FOREACH (walk, outputs, slist) {
 235         if (walk->bar == XCB_NONE) {
 236             continue;
 237         }
 238         mask = XCB_CONFIG_WINDOW_X |
 239                XCB_CONFIG_WINDOW_Y |
 240                XCB_CONFIG_WINDOW_WIDTH |
 241                XCB_CONFIG_WINDOW_HEIGHT |
 242                XCB_CONFIG_WINDOW_STACK_MODE;
 243         values[0] = walk->rect.x;
 244         if (config.position == POS_TOP)
 245             values[1] = walk->rect.y;
 246         else
 247             values[1] = walk->rect.y + walk->rect.h - bar_height;
 248         values[2] = walk->rect.w;
 249         values[3] = bar_height;
 250         values[4] = XCB_STACK_MODE_ABOVE;
 251         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 252         cookie = xcb_configure_window_checked(xcb_connection,
 253                                               walk->bar,
 254                                               mask,
 255                                               values);
 256
 257         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 258             exit(EXIT_FAILURE);
 259         }
 260         xcb_map_window(xcb_connection, walk->bar);
 261     }
 262 }
 263
 264 /*
 265  * Parse the colors into a format that we can use
 266  *
 267  */
 268 void init_colors(const struct xcb_color_strings_t *new_colors) {
 269 #define PARSE_COLOR(name, def)                                                   \
 270     do {                                                                         \
 271         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 272     } while (0)
 273     PARSE_COLOR(bar_fg, "#FFFFFF");
 274     PARSE_COLOR(bar_bg, "#000000");
 275     PARSE_COLOR(sep_fg, "#666666");
 276     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 277     PARSE_COLOR(active_ws_bg, "#333333");
 278     PARSE_COLOR(active_ws_border, "#333333");
 279     PARSE_COLOR(inactive_ws_fg, "#888888");
 280     PARSE_COLOR(inactive_ws_bg, "#222222");
 281     PARSE_COLOR(inactive_ws_border, "#333333");
 282     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 283     PARSE_COLOR(urgent_ws_bg, "#900000");
 284     PARSE_COLOR(urgent_ws_border, "#2f343a");
 285     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 286     PARSE_COLOR(focus_ws_bg, "#285577");
 287     PARSE_COLOR(focus_ws_border, "#4c7899");
 288 #undef PARSE_COLOR
 289
 290     init_tray_colors();
 291     xcb_flush(xcb_connection);
 292 }
 293
 294 /*
 295  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 296  * We determine, whether the click occured on a ws-button or if the scroll-
 297  * wheel was used and change the workspace appropriately
 298  *
 299  */
 300 void handle_button(xcb_button_press_event_t *event) {
 301     i3_ws *cur_ws;
 302
 303     /* Determine, which bar was clicked */
 304     i3_output *walk;
 305     xcb_window_t bar = event->event;
 306     SLIST_FOREACH (walk, outputs, slist) {
 307         if (walk->bar == bar) {
 308             break;
 309         }
 310     }
 311
 312     if (walk == NULL) {
 313         DLOG("Unknown Bar klicked!\n");
 314         return;
 315     }
 316
 317     /* TODO: Move this to extern get_ws_for_output() */
 318     TAILQ_FOREACH (cur_ws, walk->workspaces, tailq) {
 319         if (cur_ws->visible) {
 320             break;
 321         }
 322     }
 323
 324     if (cur_ws == NULL) {
 325         DLOG("No Workspace active?\n");
 326         return;
 327     }
 328
 329     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 330     int32_t original_x = x;
 331
 332     DLOG("Got Button %d\n", event->detail);
 333
 334     if (child_want_click_events()) {
 335         /* If the child asked for click events,
 336          * check if a status block has been clicked. */
 337
 338         /* First calculate width of tray area */
 339         trayclient *trayclient;
 340         int tray_width = 0;
 341         TAILQ_FOREACH_REVERSE (trayclient, walk->trayclients, tc_head, tailq) {
 342             if (!trayclient->mapped)
 343                 continue;
 344             tray_width += (font.height + logical_px(2));
 345         }
 346
 347         int block_x = 0, last_block_x;
 348         int offset = (walk->rect.w - (statusline_width + tray_width)) - logical_px(10);
 349
 350         x = original_x - offset;
 351         if (x >= 0) {
 352             struct status_block *block;
 353
 354             TAILQ_FOREACH (block, &statusline_head, blocks) {
 355                 last_block_x = block_x;
 356                 block_x += block->width + block->x_offset + block->x_append;
 357
 358                 if (x <= block_x && x >= last_block_x) {
 359                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 360                     return;
 361                 }
 362             }
 363         }
 364         x = original_x;
 365     }
 366
 367     switch (event->detail) {
 368         case 4:
 369             /* Mouse wheel up. We select the previous ws, if any.
 370              * If there is no more workspace, don’t even send the workspace
 371              * command, otherwise (with workspace auto_back_and_forth) we’d end
 372              * up on the wrong workspace. */
 373             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 374                 return;
 375
 376             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 377             break;
 378         case 5:
 379             /* Mouse wheel down. We select the next ws, if any.
 380              * If there is no more workspace, don’t even send the workspace
 381              * command, otherwise (with workspace auto_back_and_forth) we’d end
 382              * up on the wrong workspace. */
 383             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 384                 return;
 385
 386             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 387             break;
 388         case 1:
 389             /* Check if this event regards a workspace button */
 390             TAILQ_FOREACH (cur_ws, walk->workspaces, tailq) {
 391                 DLOG("x = %d\n", x);
 392                 if (x >= 0 && x < cur_ws->name_width + logical_px(10)) {
 393                     break;
 394                 }
 395                 x -= cur_ws->name_width + logical_px(11);
 396             }
 397
 398             /* Otherwise, focus our currently visible workspace if it is not
 399              * already focused */
 400             if (cur_ws == NULL) {
 401                 TAILQ_FOREACH (cur_ws, walk->workspaces, tailq) {
 402                     if (cur_ws->visible && !cur_ws->focused)
 403                         break;
 404                 }
 405             }
 406
 407             /* if there is nothing to focus, we are done */
 408             if (cur_ws == NULL)
 409                 return;
 410
 411             break;
 412         default:
 413             return;
 414     }
 415
 416     /* To properly handle workspace names with double quotes in them, we need
 417      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 418      * first count the number of double quotes, then we allocate a large enough
 419      * buffer, then we copy character by character. */
 420     int num_quotes = 0;
 421     size_t namelen = 0;
 422     const char *utf8_name = cur_ws->canonical_name;
 423     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 424         if (*walk == '"')
 425             num_quotes++;
 426         /* While we’re looping through the name anyway, we can save one
 427          * strlen(). */
 428         namelen++;
 429     }
 430
 431     const size_t len = namelen + strlen("workspace \"\"") + 1;
 432     char *buffer = scalloc(len + num_quotes);
 433     strncpy(buffer, "workspace \"", strlen("workspace \""));
 434     size_t inpos, outpos;
 435     for (inpos = 0, outpos = strlen("workspace \"");
 436          inpos < namelen;
 437          inpos++, outpos++) {
 438         if (utf8_name[inpos] == '"') {
 439             buffer[outpos] = '\\';
 440             outpos++;
 441         }
 442         buffer[outpos] = utf8_name[inpos];
 443     }
 444     buffer[outpos] = '"';
 445     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 446     free(buffer);
 447 }
 448
 449 /*
 450  * Adjusts the size of the tray window and alignment of the tray clients by
 451  * configuring their respective x coordinates. To be called when mapping or
 452  * unmapping a tray client window.
 453  *
 454  */
 455 static void configure_trayclients(void) {
 456     trayclient *trayclient;
 457     i3_output *output;
 458     SLIST_FOREACH (output, outputs, slist) {
 459         if (!output->active)
 460             continue;
 461
 462         int clients = 0;
 463         TAILQ_FOREACH_REVERSE (trayclient, output->trayclients, tc_head, tailq) {
 464             if (!trayclient->mapped)
 465                 continue;
 466             clients++;
 467
 468             DLOG("Configuring tray window %08x to x=%d\n",
 469                  trayclient->win, output->rect.w - (clients * (font.height + logical_px(2))));
 470             uint32_t x = output->rect.w - (clients * (font.height + logical_px(2)));
 471             xcb_configure_window(xcb_connection,
 472                                  trayclient->win,
 473                                  XCB_CONFIG_WINDOW_X,
 474                                  &x);
 475         }
 476     }
 477 }
 478
 479 /*
 480  * Handles ClientMessages (messages sent from another client directly to us).
 481  *
 482  * At the moment, only the tray window will receive client messages. All
 483  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 484  *
 485  */
 486 static void handle_client_message(xcb_client_message_event_t *event) {
 487     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 488         event->format == 32) {
 489         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 490         /* event->data.data32[0] is the timestamp */
 491         uint32_t op = event->data.data32[1];
 492         uint32_t mask;
 493         uint32_t values[2];
 494         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 495             xcb_window_t client = event->data.data32[2];
 496
 497             /* Listen for PropertyNotify events to get the most recent value of
 498              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 499             mask = XCB_CW_EVENT_MASK;
 500             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 501                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 502             xcb_change_window_attributes(xcb_connection,
 503                                          client,
 504                                          mask,
 505                                          values);
 506
 507             /* Request the _XEMBED_INFO property. The XEMBED specification
 508              * (which is referred by the tray specification) says this *has* to
 509              * be set, but VLC does not set it… */
 510             bool map_it = true;
 511             int xe_version = 1;
 512             xcb_get_property_cookie_t xembedc;
 513             xcb_generic_error_t *error;
 514             xembedc = xcb_get_property(xcb_connection,
 515                                        0,
 516                                        client,
 517                                        atoms[_XEMBED_INFO],
 518                                        XCB_GET_PROPERTY_TYPE_ANY,
 519                                        0,
 520                                        2 * 32);
 521
 522             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 523                                                                        xembedc,
 524                                                                        &error);
 525             if (error != NULL) {
 526                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 527                      error->error_code);
 528                 free(error);
 529                 return;
 530             }
 531             if (xembedr != NULL && xembedr->length != 0) {
 532                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 533                 uint32_t *xembed = xcb_get_property_value(xembedr);
 534                 DLOG("xembed version = %d\n", xembed[0]);
 535                 DLOG("xembed flags = %d\n", xembed[1]);
 536                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 537                 xe_version = xembed[0];
 538                 if (xe_version > 1)
 539                     xe_version = 1;
 540                 free(xembedr);
 541             } else {
 542                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 543             }
 544
 545             DLOG("X window %08x requested docking\n", client);
 546             i3_output *walk, *output = NULL;
 547             SLIST_FOREACH (walk, outputs, slist) {
 548                 if (!walk->active)
 549                     continue;
 550                 if (config.tray_output) {
 551                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 552                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 553                         continue;
 554                 }
 555
 556                 DLOG("using output %s\n", walk->name);
 557                 output = walk;
 558                 break;
 559             }
 560             /* In case of tray_output == primary and there is no primary output
 561              * configured, we fall back to the first available output. */
 562             if (output == NULL &&
 563                 config.tray_output &&
 564                 strcasecmp("primary", config.tray_output) == 0) {
 565                 SLIST_FOREACH (walk, outputs, slist) {
 566                     if (!walk->active)
 567                         continue;
 568                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 569                     output = walk;
 570                     break;
 571                 }
 572             }
 573             if (output == NULL) {
 574                 ELOG("No output found\n");
 575                 return;
 576             }
 577             xcb_reparent_window(xcb_connection,
 578                                 client,
 579                                 output->bar,
 580                                 output->rect.w - font.height - 2,
 581                                 2);
 582             /* We reconfigure the window to use a reasonable size. The systray
 583              * specification explicitly says:
 584              *   Tray icons may be assigned any size by the system tray, and
 585              *   should do their best to cope with any size effectively
 586              */
 587             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 588             values[0] = font.height;
 589             values[1] = font.height;
 590             xcb_configure_window(xcb_connection,
 591                                  client,
 592                                  mask,
 593                                  values);
 594
 595             /* send the XEMBED_EMBEDDED_NOTIFY message */
 596             void *event = scalloc(32);
 597             xcb_client_message_event_t *ev = event;
 598             ev->response_type = XCB_CLIENT_MESSAGE;
 599             ev->window = client;
 600             ev->type = atoms[_XEMBED];
 601             ev->format = 32;
 602             ev->data.data32[0] = XCB_CURRENT_TIME;
 603             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 604             ev->data.data32[2] = output->bar;
 605             ev->data.data32[3] = xe_version;
 606             xcb_send_event(xcb_connection,
 607                            0,
 608                            client,
 609                            XCB_EVENT_MASK_NO_EVENT,
 610                            (char *)ev);
 611             free(event);
 612
 613             /* Put the client inside the save set. Upon termination (whether
 614              * killed or normal exit does not matter) of i3bar, these clients
 615              * will be correctly reparented to their most closest living
 616              * ancestor. Without this, tray icons might die when i3bar
 617              * exits/crashes. */
 618             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 619
 620             trayclient *tc = smalloc(sizeof(trayclient));
 621             tc->win = client;
 622             tc->xe_version = xe_version;
 623             tc->mapped = false;
 624             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 625
 626             if (map_it) {
 627                 DLOG("Mapping dock client\n");
 628                 xcb_map_window(xcb_connection, client);
 629             } else {
 630                 DLOG("Not mapping dock client yet\n");
 631             }
 632             /* Trigger an update to copy the statusline text to the appropriate
 633              * position */
 634             configure_trayclients();
 635             draw_bars(false);
 636         }
 637     }
 638 }
 639
 640 /*
 641  * Handles DestroyNotify events by removing the tray client from the data
 642  * structure. According to the XEmbed protocol, this is one way for a tray
 643  * client to finish the protocol. After this event is received, there is no
 644  * further interaction with the tray client.
 645  *
 646  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 647  *
 648  */
 649 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 650     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 651
 652     i3_output *walk;
 653     SLIST_FOREACH (walk, outputs, slist) {
 654         if (!walk->active)
 655             continue;
 656         DLOG("checking output %s\n", walk->name);
 657         trayclient *trayclient;
 658         TAILQ_FOREACH (trayclient, walk->trayclients, tailq) {
 659             if (trayclient->win != event->window)
 660                 continue;
 661
 662             DLOG("Removing tray client with window ID %08x\n", event->window);
 663             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 664
 665             /* Trigger an update, we now have more space for the statusline */
 666             configure_trayclients();
 667             draw_bars(false);
 668             return;
 669         }
 670     }
 671 }
 672
 673 /*
 674  * Handles MapNotify events. These events happen when a tray client shows its
 675  * window. We respond by realigning the tray clients.
 676  *
 677  */
 678 static void handle_map_notify(xcb_map_notify_event_t *event) {
 679     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 680
 681     i3_output *walk;
 682     SLIST_FOREACH (walk, outputs, slist) {
 683         if (!walk->active)
 684             continue;
 685         DLOG("checking output %s\n", walk->name);
 686         trayclient *trayclient;
 687         TAILQ_FOREACH (trayclient, walk->trayclients, tailq) {
 688             if (trayclient->win != event->window)
 689                 continue;
 690
 691             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 692             trayclient->mapped = true;
 693
 694             /* Trigger an update, we now have more space for the statusline */
 695             configure_trayclients();
 696             draw_bars(false);
 697             return;
 698         }
 699     }
 700 }
 701 /*
 702  * Handles UnmapNotify events. These events happen when a tray client hides its
 703  * window. We respond by realigning the tray clients.
 704  *
 705  */
 706 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 707     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 708
 709     i3_output *walk;
 710     SLIST_FOREACH (walk, outputs, slist) {
 711         if (!walk->active)
 712             continue;
 713         DLOG("checking output %s\n", walk->name);
 714         trayclient *trayclient;
 715         TAILQ_FOREACH (trayclient, walk->trayclients, tailq) {
 716             if (trayclient->win != event->window)
 717                 continue;
 718
 719             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 720             trayclient->mapped = false;
 721
 722             /* Trigger an update, we now have more space for the statusline */
 723             configure_trayclients();
 724             draw_bars(false);
 725             return;
 726         }
 727     }
 728 }
 729
 730 /*
 731  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 732  * handled, which tells us whether a dock client should be mapped or unmapped.
 733  *
 734  */
 735 static void handle_property_notify(xcb_property_notify_event_t *event) {
 736     DLOG("PropertyNotify\n");
 737     if (event->atom == atoms[_XEMBED_INFO] &&
 738         event->state == XCB_PROPERTY_NEW_VALUE) {
 739         DLOG("xembed_info updated\n");
 740         trayclient *trayclient = NULL, *walk;
 741         i3_output *o_walk;
 742         SLIST_FOREACH (o_walk, outputs, slist) {
 743             if (!o_walk->active)
 744                 continue;
 745
 746             TAILQ_FOREACH (walk, o_walk->trayclients, tailq) {
 747                 if (walk->win != event->window)
 748                     continue;
 749                 trayclient = walk;
 750                 break;
 751             }
 752
 753             if (trayclient)
 754                 break;
 755         }
 756         if (!trayclient) {
 757             ELOG("PropertyNotify received for unknown window %08x\n",
 758                  event->window);
 759             return;
 760         }
 761         xcb_get_property_cookie_t xembedc;
 762         xembedc = xcb_get_property_unchecked(xcb_connection,
 763                                              0,
 764                                              trayclient->win,
 765                                              atoms[_XEMBED_INFO],
 766                                              XCB_GET_PROPERTY_TYPE_ANY,
 767                                              0,
 768                                              2 * 32);
 769
 770         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 771                                                                    xembedc,
 772                                                                    NULL);
 773         if (xembedr == NULL || xembedr->length == 0) {
 774             DLOG("xembed_info unset\n");
 775             return;
 776         }
 777
 778         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 779         uint32_t *xembed = xcb_get_property_value(xembedr);
 780         DLOG("xembed version = %d\n", xembed[0]);
 781         DLOG("xembed flags = %d\n", xembed[1]);
 782         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 783         DLOG("map-state now %d\n", map_it);
 784         if (trayclient->mapped && !map_it) {
 785             /* need to unmap the window */
 786             xcb_unmap_window(xcb_connection, trayclient->win);
 787         } else if (!trayclient->mapped && map_it) {
 788             /* need to map the window */
 789             xcb_map_window(xcb_connection, trayclient->win);
 790         }
 791         free(xembedr);
 792     }
 793 }
 794
 795 /*
 796  * Handle ConfigureRequests by denying them and sending the client a
 797  * ConfigureNotify with its actual size.
 798  *
 799  */
 800 static void handle_configure_request(xcb_configure_request_event_t *event) {
 801     DLOG("ConfigureRequest for window = %08x\n", event->window);
 802
 803     trayclient *trayclient;
 804     i3_output *output;
 805     SLIST_FOREACH (output, outputs, slist) {
 806         if (!output->active)
 807             continue;
 808
 809         int clients = 0;
 810         TAILQ_FOREACH_REVERSE (trayclient, output->trayclients, tc_head, tailq) {
 811             if (!trayclient->mapped)
 812                 continue;
 813             clients++;
 814
 815             if (trayclient->win != event->window)
 816                 continue;
 817
 818             xcb_rectangle_t rect;
 819             rect.x = output->rect.w - (clients * (font.height + 2));
 820             rect.y = 2;
 821             rect.width = font.height;
 822             rect.height = font.height;
 823
 824             DLOG("This is a tray window. x = %d\n", rect.x);
 825             fake_configure_notify(xcb_connection, rect, event->window, 0);
 826             return;
 827         }
 828     }
 829
 830     DLOG("WARNING: Could not find corresponding tray window.\n");
 831 }
 832
 833 /*
 834  * This function is called immediately before the main loop locks. We flush xcb
 835  * then (and only then)
 836  *
 837  */
 838 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 839     xcb_flush(xcb_connection);
 840 }
 841
 842 /*
 843  * This function is called immediately after the main loop locks, so when one
 844  * of the watchers registered an event.
 845  * We check whether an X-Event arrived and handle it.
 846  *
 847  */
 848 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 849     xcb_generic_event_t *event;
 850
 851     if (xcb_connection_has_error(xcb_connection)) {
 852         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 853         exit(1);
 854     }
 855
 856     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 857         switch (event->response_type & ~0x80) {
 858             case XCB_EXPOSE:
 859                 /* Expose-events happen, when the window needs to be redrawn */
 860                 redraw_bars();
 861                 break;
 862             case XCB_BUTTON_PRESS:
 863                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 864                 handle_button((xcb_button_press_event_t *)event);
 865                 break;
 866             case XCB_CLIENT_MESSAGE:
 867                 /* Client messages are used for client-to-client communication, for
 868                  * example system tray widgets talk to us directly via client messages. */
 869                 handle_client_message((xcb_client_message_event_t *)event);
 870                 break;
 871             case XCB_DESTROY_NOTIFY:
 872                 /* DestroyNotify signifies the end of the XEmbed protocol */
 873                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
 874                 break;
 875             case XCB_UNMAP_NOTIFY:
 876                 /* UnmapNotify is received when a tray client hides its window. */
 877                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
 878                 break;
 879             case XCB_MAP_NOTIFY:
 880                 handle_map_notify((xcb_map_notify_event_t *)event);
 881                 break;
 882             case XCB_PROPERTY_NOTIFY:
 883                 /* PropertyNotify */
 884                 handle_property_notify((xcb_property_notify_event_t *)event);
 885                 break;
 886             case XCB_CONFIGURE_REQUEST:
 887                 /* ConfigureRequest, sent by a tray child */
 888                 handle_configure_request((xcb_configure_request_event_t *)event);
 889                 break;
 890         }
 891         free(event);
 892     }
 893 }
 894
 895 /*
 896  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 897  * are triggered
 898  *
 899  */
 900 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 901 }
 902
 903 /*
 904  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 905  *
 906  */
 907 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 908     XkbEvent ev;
 909     int modstate = 0;
 910
 911     DLOG("Got XKB-Event!\n");
 912
 913     while (XPending(xkb_dpy)) {
 914         XNextEvent(xkb_dpy, (XEvent *)&ev);
 915
 916         if (ev.type != xkb_event_base) {
 917             ELOG("No Xkb-Event!\n");
 918             continue;
 919         }
 920
 921         if (ev.any.xkb_type != XkbStateNotify) {
 922             ELOG("No State Notify!\n");
 923             continue;
 924         }
 925
 926         unsigned int mods = ev.state.mods;
 927         modstate = mods & config.modifier;
 928     }
 929
 930 #define DLOGMOD(modmask, status)                        \
 931     do {                                                \
 932         switch (modmask) {                              \
 933             case ShiftMask:                             \
 934                 DLOG("ShiftMask got " #status "!\n");   \
 935                 break;                                  \
 936             case ControlMask:                           \
 937                 DLOG("ControlMask got " #status "!\n"); \
 938                 break;                                  \
 939             case Mod1Mask:                              \
 940                 DLOG("Mod1Mask got " #status "!\n");    \
 941                 break;                                  \
 942             case Mod2Mask:                              \
 943                 DLOG("Mod2Mask got " #status "!\n");    \
 944                 break;                                  \
 945             case Mod3Mask:                              \
 946                 DLOG("Mod3Mask got " #status "!\n");    \
 947                 break;                                  \
 948             case Mod4Mask:                              \
 949                 DLOG("Mod4Mask got " #status "!\n");    \
 950                 break;                                  \
 951             case Mod5Mask:                              \
 952                 DLOG("Mod5Mask got " #status "!\n");    \
 953                 break;                                  \
 954         }                                               \
 955     } while (0)
 956
 957     if (modstate != mod_pressed) {
 958         if (modstate == 0) {
 959             DLOGMOD(config.modifier, released);
 960             if (!activated_mode)
 961                 hide_bars();
 962         } else {
 963             DLOGMOD(config.modifier, pressed);
 964             activated_mode = false;
 965             unhide_bars();
 966         }
 967         mod_pressed = modstate;
 968     }
 969
 970 #undef DLOGMOD
 971 }
 972
 973 /*
 974  * Early initialization of the connection to X11: Everything which does not
 975  * depend on 'config'.
 976  *
 977  */
 978 char *init_xcb_early() {
 979     /* FIXME: xcb_connect leaks Memory */
 980     xcb_connection = xcb_connect(NULL, &screen);
 981     if (xcb_connection_has_error(xcb_connection)) {
 982         ELOG("Cannot open display\n");
 983         exit(EXIT_FAILURE);
 984     }
 985     conn = xcb_connection;
 986     DLOG("Connected to xcb\n");
 987
 988 /* We have to request the atoms we need */
 989 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 990 #include "xcb_atoms.def"
 991
 992     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 993     xcb_root = root_screen->root;
 994
 995     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 996      * this way, we can choose to crop it */
 997     uint32_t mask = XCB_GC_FOREGROUND;
 998     uint32_t vals[] = {colors.bar_bg, colors.bar_bg};
 999
1000     statusline_clear = xcb_generate_id(xcb_connection);
1001     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1002                                                                statusline_clear,
1003                                                                xcb_root,
1004                                                                mask,
1005                                                                vals);
1006
1007     statusline_ctx = xcb_generate_id(xcb_connection);
1008     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1009                                                             statusline_ctx,
1010                                                             xcb_root,
1011                                                             0,
1012                                                             NULL);
1013
1014     statusline_pm = xcb_generate_id(xcb_connection);
1015     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1016                                                                root_screen->root_depth,
1017                                                                statusline_pm,
1018                                                                xcb_root,
1019                                                                root_screen->width_in_pixels,
1020                                                                root_screen->height_in_pixels);
1021
1022     /* The various Watchers to communicate with xcb */
1023     xcb_io = smalloc(sizeof(ev_io));
1024     xcb_prep = smalloc(sizeof(ev_prepare));
1025     xcb_chk = smalloc(sizeof(ev_check));
1026
1027     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1028     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1029     ev_check_init(xcb_chk, &xcb_chk_cb);
1030
1031     ev_io_start(main_loop, xcb_io);
1032     ev_prepare_start(main_loop, xcb_prep);
1033     ev_check_start(main_loop, xcb_chk);
1034
1035     /* Now we get the atoms and save them in a nice data structure */
1036     get_atoms();
1037
1038     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
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     return path;
1047 }
1048
1049 /*
1050  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key-events
1051  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1052  * in xcb.
1053  *
1054  */
1055 void register_xkb_keyevents() {
1056     if (xkb_dpy == NULL) {
1057         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
1058         xkb_major = XkbMajorVersion;
1059         xkb_minor = XkbMinorVersion;
1060
1061         xkb_dpy = XkbOpenDisplay(NULL,
1062                                  &xkb_event_base,
1063                                  &xkb_errbase,
1064                                  &xkb_major,
1065                                  &xkb_minor,
1066                                  &xkb_err);
1067
1068         if (xkb_dpy == NULL) {
1069             ELOG("No XKB!\n");
1070             exit(EXIT_FAILURE);
1071         }
1072
1073         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
1074             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
1075             exit(EXIT_FAILURE);
1076         }
1077
1078         int i1;
1079         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
1080             ELOG("XKB not supported by X-server!\n");
1081             exit(EXIT_FAILURE);
1082         }
1083
1084         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
1085             ELOG("Could not grab Key!\n");
1086             exit(EXIT_FAILURE);
1087         }
1088
1089         xkb_io = smalloc(sizeof(ev_io));
1090         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
1091         ev_io_start(main_loop, xkb_io);
1092         XFlush(xkb_dpy);
1093     }
1094 }
1095
1096 /*
1097  * Deregister from xkb keyevents.
1098  *
1099  */
1100 void deregister_xkb_keyevents() {
1101     if (xkb_dpy != NULL) {
1102         ev_io_stop(main_loop, xkb_io);
1103         XCloseDisplay(xkb_dpy);
1104         close(xkb_io->fd);
1105         FREE(xkb_io);
1106         xkb_dpy = NULL;
1107     }
1108 }
1109
1110 /*
1111  * Initialization which depends on 'config' being usable. Called after the
1112  * configuration has arrived.
1113  *
1114  */
1115 void init_xcb_late(char *fontname) {
1116     if (fontname == NULL)
1117         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1118
1119     /* Load the font */
1120     font = load_font(fontname, true);
1121     set_font(&font);
1122     DLOG("Calculated Font-height: %d\n", font.height);
1123     bar_height = font.height + logical_px(6);
1124
1125     xcb_flush(xcb_connection);
1126
1127     if (config.hide_on_modifier == M_HIDE)
1128         register_xkb_keyevents();
1129 }
1130
1131 /*
1132  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1133  * selection.
1134  *
1135  */
1136 static void send_tray_clientmessage(void) {
1137     uint8_t buffer[32] = {0};
1138     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1139
1140     ev->response_type = XCB_CLIENT_MESSAGE;
1141     ev->window = xcb_root;
1142     ev->type = atoms[MANAGER];
1143     ev->format = 32;
1144     ev->data.data32[0] = XCB_CURRENT_TIME;
1145     ev->data.data32[1] = tray_reply->atom;
1146     ev->data.data32[2] = selwin;
1147
1148     xcb_send_event(xcb_connection,
1149                    0,
1150                    xcb_root,
1151                    0xFFFFFF,
1152                    (char *)buffer);
1153 }
1154
1155 /*
1156  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1157  * for the X11 display we are running on, then acquiring the selection for this
1158  * atom. Afterwards, tray clients will send ClientMessages to our window.
1159  *
1160  */
1161 void init_tray(void) {
1162     DLOG("Initializing system tray functionality\n");
1163     /* request the tray manager atom for the X11 display we are running on */
1164     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1165     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1166     xcb_intern_atom_cookie_t tray_cookie;
1167     if (tray_reply == NULL)
1168         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1169
1170     /* tray support: we need a window to own the selection */
1171     selwin = xcb_generate_id(xcb_connection);
1172     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1173     uint32_t selval[] = {1};
1174     xcb_create_window(xcb_connection,
1175                       root_screen->root_depth,
1176                       selwin,
1177                       xcb_root,
1178                       -1, -1,
1179                       1, 1,
1180                       0,
1181                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1182                       root_screen->root_visual,
1183                       selmask,
1184                       selval);
1185
1186     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1187     /* set the atoms */
1188     xcb_change_property(xcb_connection,
1189                         XCB_PROP_MODE_REPLACE,
1190                         selwin,
1191                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1192                         XCB_ATOM_CARDINAL,
1193                         32,
1194                         1,
1195                         &orientation);
1196
1197     init_tray_colors();
1198
1199     if (tray_reply == NULL) {
1200         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1201             ELOG("Could not get atom %s\n", atomname);
1202             exit(EXIT_FAILURE);
1203         }
1204     }
1205
1206     xcb_set_selection_owner(xcb_connection,
1207                             selwin,
1208                             tray_reply->atom,
1209                             XCB_CURRENT_TIME);
1210
1211     /* Verify that we have the selection */
1212     xcb_get_selection_owner_cookie_t selcookie;
1213     xcb_get_selection_owner_reply_t *selreply;
1214
1215     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1216     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1217         ELOG("Could not get selection owner for %s\n", atomname);
1218         exit(EXIT_FAILURE);
1219     }
1220
1221     if (selreply->owner != selwin) {
1222         ELOG("Could not set the %s selection. "
1223              "Maybe another tray is already running?\n",
1224              atomname);
1225         /* NOTE that this error is not fatal. We just can’t provide tray
1226          * functionality */
1227         free(selreply);
1228         return;
1229     }
1230
1231     send_tray_clientmessage();
1232 }
1233
1234 /*
1235  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1236  * to make GTK+ 3 applets with Symbolic Icons visible. If the colors are unset,
1237  * they assume a light background.
1238  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1239  *
1240  */
1241 void init_tray_colors(void) {
1242     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1243     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1244
1245     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1246
1247     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1248                             {bar_fg[3], bar_fg[4], '\0'},
1249                             {bar_fg[5], bar_fg[6], '\0'}};
1250     const uint8_t r = strtol(strgroups[0], NULL, 16);
1251     const uint8_t g = strtol(strgroups[1], NULL, 16);
1252     const uint8_t b = strtol(strgroups[2], NULL, 16);
1253
1254     const uint16_t r16 = ((uint16_t)r << 8) | r;
1255     const uint16_t g16 = ((uint16_t)g << 8) | g;
1256     const uint16_t b16 = ((uint16_t)b << 8) | b;
1257
1258     const uint32_t tray_colors[12] = {
1259         r16, g16, b16, /* foreground color */
1260         r16, g16, b16, /* error color */
1261         r16, g16, b16, /* warning color */
1262         r16, g16, b16, /* success color */
1263     };
1264
1265     xcb_change_property(xcb_connection,
1266                         XCB_PROP_MODE_REPLACE,
1267                         selwin,
1268                         atoms[_NET_SYSTEM_TRAY_COLORS],
1269                         XCB_ATOM_CARDINAL,
1270                         32,
1271                         12,
1272                         tray_colors);
1273 }
1274
1275 /*
1276  * Cleanup the xcb-stuff.
1277  * Called once, before the program terminates.
1278  *
1279  */
1280 void clean_xcb(void) {
1281     i3_output *o_walk;
1282     free_workspaces();
1283     SLIST_FOREACH (o_walk, outputs, slist) {
1284         destroy_window(o_walk);
1285         FREE(o_walk->trayclients);
1286         FREE(o_walk->workspaces);
1287         FREE(o_walk->name);
1288     }
1289     FREE_SLIST(outputs, i3_output);
1290     FREE(outputs);
1291
1292     xcb_flush(xcb_connection);
1293     xcb_disconnect(xcb_connection);
1294
1295     ev_check_stop(main_loop, xcb_chk);
1296     ev_prepare_stop(main_loop, xcb_prep);
1297     ev_io_stop(main_loop, xcb_io);
1298
1299     FREE(xcb_chk);
1300     FREE(xcb_prep);
1301     FREE(xcb_io);
1302 }
1303
1304 /*
1305  * Get the earlier requested atoms and save them in the prepared data structure
1306  *
1307  */
1308 void get_atoms(void) {
1309     xcb_intern_atom_reply_t *reply;
1310 #define ATOM_DO(name)                                                        \
1311     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1312     if (reply == NULL) {                                                     \
1313         ELOG("Could not get atom %s\n", #name);                              \
1314         exit(EXIT_FAILURE);                                                  \
1315     }                                                                        \
1316     atoms[name] = reply->atom;                                               \
1317     free(reply);
1318
1319 #include "xcb_atoms.def"
1320     DLOG("Got Atoms\n");
1321 }
1322
1323 /*
1324  * Reparents all tray clients of the specified output to the root window. This
1325  * is either used when shutting down, when an output appears (xrandr --output
1326  * VGA1 --off) or when the primary output changes.
1327  *
1328  * Applications using the tray will start the protocol from the beginning again
1329  * afterwards.
1330  *
1331  */
1332 void kick_tray_clients(i3_output *output) {
1333     if (TAILQ_EMPTY(output->trayclients))
1334         return;
1335
1336     trayclient *trayclient;
1337     while (!TAILQ_EMPTY(output->trayclients)) {
1338         trayclient = TAILQ_FIRST(output->trayclients);
1339         /* Unmap, then reparent (to root) the tray client windows */
1340         xcb_unmap_window(xcb_connection, trayclient->win);
1341         xcb_reparent_window(xcb_connection,
1342                             trayclient->win,
1343                             xcb_root,
1344                             0,
1345                             0);
1346
1347         /* We remove the trayclient right here. We might receive an UnmapNotify
1348          * event afterwards, but better safe than sorry. */
1349         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1350     }
1351
1352     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1353      * We cannot actually destroy the window because then Qt will not restore
1354      * its event mask on the new window. */
1355     uint8_t buffer[32] = {0};
1356     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1357
1358     event->response_type = XCB_DESTROY_NOTIFY;
1359     event->event = selwin;
1360     event->window = selwin;
1361
1362     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1363
1364     send_tray_clientmessage();
1365 }
1366
1367 /*
1368  * Destroy the bar of the specified output
1369  *
1370  */
1371 void destroy_window(i3_output *output) {
1372     if (output == NULL) {
1373         return;
1374     }
1375     if (output->bar == XCB_NONE) {
1376         return;
1377     }
1378
1379     kick_tray_clients(output);
1380     xcb_destroy_window(xcb_connection, output->bar);
1381     output->bar = XCB_NONE;
1382 }
1383
1384 /*
1385  * Reallocate the statusline-buffer
1386  *
1387  */
1388 void realloc_sl_buffer(void) {
1389     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1390          statusline_width, root_screen->width_in_pixels);
1391     xcb_free_pixmap(xcb_connection, statusline_pm);
1392     statusline_pm = xcb_generate_id(xcb_connection);
1393     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1394                                                                root_screen->root_depth,
1395                                                                statusline_pm,
1396                                                                xcb_root,
1397                                                                MAX(root_screen->width_in_pixels, statusline_width),
1398                                                                bar_height);
1399
1400     uint32_t mask = XCB_GC_FOREGROUND;
1401     uint32_t vals[2] = {colors.bar_bg, colors.bar_bg};
1402     xcb_free_gc(xcb_connection, statusline_clear);
1403     statusline_clear = xcb_generate_id(xcb_connection);
1404     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1405                                                                statusline_clear,
1406                                                                xcb_root,
1407                                                                mask,
1408                                                                vals);
1409
1410     mask |= XCB_GC_BACKGROUND;
1411     vals[0] = colors.bar_fg;
1412     xcb_free_gc(xcb_connection, statusline_ctx);
1413     statusline_ctx = xcb_generate_id(xcb_connection);
1414     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1415                                                             statusline_ctx,
1416                                                             xcb_root,
1417                                                             mask,
1418                                                             vals);
1419
1420     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1421         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1422         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1423         exit(EXIT_FAILURE);
1424     }
1425 }
1426
1427 /*
1428  * Reconfigure all bars and create new bars for recently activated outputs
1429  *
1430  */
1431 void reconfig_windows(bool redraw_bars) {
1432     uint32_t mask;
1433     uint32_t values[5];
1434     static bool tray_configured = false;
1435
1436     i3_output *walk;
1437     SLIST_FOREACH (walk, outputs, slist) {
1438         if (!walk->active) {
1439             /* If an output is not active, we destroy its bar */
1440             /* FIXME: Maybe we rather want to unmap? */
1441             DLOG("Destroying window for output %s\n", walk->name);
1442             destroy_window(walk);
1443             continue;
1444         }
1445         if (walk->bar == XCB_NONE) {
1446             DLOG("Creating Window for output %s\n", walk->name);
1447
1448             walk->bar = xcb_generate_id(xcb_connection);
1449             walk->buffer = xcb_generate_id(xcb_connection);
1450             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1451             /* Black background */
1452             values[0] = colors.bar_bg;
1453             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar-windows */
1454             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1455             /* We enable the following EventMask fields:
1456              * EXPOSURE, to get expose events (we have to re-draw then)
1457              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1458              *                        child windows use ConfigureWindow
1459              * BUTTON_PRESS, to handle clicks on the workspace buttons
1460              * */
1461             values[2] = XCB_EVENT_MASK_EXPOSURE |
1462                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1463             if (!config.disable_ws) {
1464                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1465             }
1466             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1467                                                                      root_screen->root_depth,
1468                                                                      walk->bar,
1469                                                                      xcb_root,
1470                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1471                                                                      walk->rect.w, bar_height,
1472                                                                      0,
1473                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1474                                                                      root_screen->root_visual,
1475                                                                      mask,
1476                                                                      values);
1477
1478             /* The double-buffer we use to render stuff off-screen */
1479             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1480                                                                     root_screen->root_depth,
1481                                                                     walk->buffer,
1482                                                                     walk->bar,
1483                                                                     walk->rect.w,
1484                                                                     bar_height);
1485
1486             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1487             xcb_void_cookie_t class_cookie;
1488             class_cookie = xcb_change_property(xcb_connection,
1489                                                XCB_PROP_MODE_REPLACE,
1490                                                walk->bar,
1491                                                XCB_ATOM_WM_CLASS,
1492                                                XCB_ATOM_STRING,
1493                                                8,
1494                                                (strlen("i3bar") + 1) * 2,
1495                                                "i3bar\0i3bar\0");
1496
1497             char *name;
1498             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1499                 err(EXIT_FAILURE, "asprintf()");
1500             xcb_void_cookie_t name_cookie;
1501             name_cookie = xcb_change_property(xcb_connection,
1502                                               XCB_PROP_MODE_REPLACE,
1503                                               walk->bar,
1504                                               XCB_ATOM_WM_NAME,
1505                                               XCB_ATOM_STRING,
1506                                               8,
1507                                               strlen(name),
1508                                               name);
1509             free(name);
1510
1511             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1512              * this one */
1513             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1514                                                                 XCB_PROP_MODE_REPLACE,
1515                                                                 walk->bar,
1516                                                                 atoms[_NET_WM_WINDOW_TYPE],
1517                                                                 XCB_ATOM_ATOM,
1518                                                                 32,
1519                                                                 1,
1520                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1521
1522             /* We need to tell i3, where to reserve space for i3bar */
1523             /* left, right, top, bottom, left_start_y, left_end_y,
1524              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1525              * bottom_end_x */
1526             /* A local struct to save the strut_partial property */
1527             struct {
1528                 uint32_t left;
1529                 uint32_t right;
1530                 uint32_t top;
1531                 uint32_t bottom;
1532                 uint32_t left_start_y;
1533                 uint32_t left_end_y;
1534                 uint32_t right_start_y;
1535                 uint32_t right_end_y;
1536                 uint32_t top_start_x;
1537                 uint32_t top_end_x;
1538                 uint32_t bottom_start_x;
1539                 uint32_t bottom_end_x;
1540             } __attribute__((__packed__)) strut_partial;
1541             memset(&strut_partial, 0, sizeof(strut_partial));
1542
1543             switch (config.position) {
1544                 case POS_NONE:
1545                     break;
1546                 case POS_TOP:
1547                     strut_partial.top = bar_height;
1548                     strut_partial.top_start_x = walk->rect.x;
1549                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1550                     break;
1551                 case POS_BOT:
1552                     strut_partial.bottom = bar_height;
1553                     strut_partial.bottom_start_x = walk->rect.x;
1554                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1555                     break;
1556             }
1557             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1558                                                                  XCB_PROP_MODE_REPLACE,
1559                                                                  walk->bar,
1560                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1561                                                                  XCB_ATOM_CARDINAL,
1562                                                                  32,
1563                                                                  12,
1564                                                                  &strut_partial);
1565
1566             /* We also want a graphics-context for the bars (it defines the properties
1567              * with which we draw to them) */
1568             walk->bargc = xcb_generate_id(xcb_connection);
1569             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1570                                                                 walk->bargc,
1571                                                                 walk->bar,
1572                                                                 0,
1573                                                                 NULL);
1574
1575             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1576             xcb_void_cookie_t map_cookie;
1577             if (config.hide_on_modifier == M_DOCK) {
1578                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1579             }
1580
1581             if (xcb_request_failed(win_cookie, "Could not create window") ||
1582                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1583                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1584                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1585                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1586                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1587                 xcb_request_failed(gc_cookie, "Could not create graphical context") ||
1588                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1589                 exit(EXIT_FAILURE);
1590             }
1591
1592             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1593             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1594                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1595                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1596                  * VGA-1 but output == [HDMI-1]).
1597                  */
1598                 i3_output *output;
1599                 SLIST_FOREACH (output, outputs, slist) {
1600                     if (strcasecmp(output->name, tray_output) == 0 ||
1601                         (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1602                         init_tray();
1603                         break;
1604                     }
1605                 }
1606                 tray_configured = true;
1607             }
1608         } else {
1609             /* We already have a bar, so we just reconfigure it */
1610             mask = XCB_CONFIG_WINDOW_X |
1611                    XCB_CONFIG_WINDOW_Y |
1612                    XCB_CONFIG_WINDOW_WIDTH |
1613                    XCB_CONFIG_WINDOW_HEIGHT |
1614                    XCB_CONFIG_WINDOW_STACK_MODE;
1615             values[0] = walk->rect.x;
1616             values[1] = walk->rect.y + walk->rect.h - bar_height;
1617             values[2] = walk->rect.w;
1618             values[3] = bar_height;
1619             values[4] = XCB_STACK_MODE_ABOVE;
1620
1621             DLOG("Destroying buffer for output %s\n", walk->name);
1622             xcb_free_pixmap(xcb_connection, walk->buffer);
1623
1624             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1625             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1626                                                                         walk->bar,
1627                                                                         mask,
1628                                                                         values);
1629
1630             mask = XCB_CW_OVERRIDE_REDIRECT;
1631             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1632             DLOG("Changing Window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1633             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1634                                                                         walk->bar,
1635                                                                         mask,
1636                                                                         values);
1637
1638             DLOG("Recreating buffer for output %s\n", walk->name);
1639             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1640                                                                     root_screen->root_depth,
1641                                                                     walk->buffer,
1642                                                                     walk->bar,
1643                                                                     walk->rect.w,
1644                                                                     bar_height);
1645
1646             xcb_void_cookie_t map_cookie, umap_cookie;
1647             if (redraw_bars) {
1648                 /* Unmap the window, and draw it again when in dock mode */
1649                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar);
1650                 if (config.hide_on_modifier == M_DOCK) {
1651                     cont_child();
1652                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1653                 } else {
1654                     stop_child();
1655                 }
1656
1657                 if (config.hide_on_modifier == M_HIDE) {
1658                     /* Switching to hide mode, register for keyevents */
1659                     register_xkb_keyevents();
1660                 } else {
1661                     /* Switching to dock/invisible mode, deregister from keyevents */
1662                     deregister_xkb_keyevents();
1663                 }
1664             }
1665
1666             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1667                 xcb_request_failed(chg_cookie, "Could not change window") ||
1668                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1669                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1670                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1671                 exit(EXIT_FAILURE);
1672             }
1673         }
1674     }
1675 }
1676
1677 /*
1678  * Render the bars, with buttons and statusline
1679  *
1680  */
1681 void draw_bars(bool unhide) {
1682     DLOG("Drawing Bars...\n");
1683     int i = 0;
1684
1685     refresh_statusline();
1686
1687     i3_output *outputs_walk;
1688     SLIST_FOREACH (outputs_walk, outputs, slist) {
1689         if (!outputs_walk->active) {
1690             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1691             continue;
1692         }
1693         if (outputs_walk->bar == XCB_NONE) {
1694             /* Oh shit, an active output without an own bar. Create it now! */
1695             reconfig_windows(false);
1696         }
1697         /* First things first: clear the backbuffer */
1698         uint32_t color = colors.bar_bg;
1699         xcb_change_gc(xcb_connection,
1700                       outputs_walk->bargc,
1701                       XCB_GC_FOREGROUND,
1702                       &color);
1703         xcb_rectangle_t rect = {0, 0, outputs_walk->rect.w, bar_height};
1704         xcb_poly_fill_rectangle(xcb_connection,
1705                                 outputs_walk->buffer,
1706                                 outputs_walk->bargc,
1707                                 1,
1708                                 &rect);
1709
1710         if (!TAILQ_EMPTY(&statusline_head)) {
1711             DLOG("Printing statusline!\n");
1712
1713             /* Luckily we already prepared a seperate pixmap containing the rendered
1714              * statusline, we just have to copy the relevant parts to the relevant
1715              * position */
1716             trayclient *trayclient;
1717             int traypx = 0;
1718             TAILQ_FOREACH (trayclient, outputs_walk->trayclients, tailq) {
1719                 if (!trayclient->mapped)
1720                     continue;
1721                 /* We assume the tray icons are quadratic (we use the font
1722                  * *height* as *width* of the icons) because we configured them
1723                  * like this. */
1724                 traypx += font.height + 2;
1725             }
1726             /* Add 2px of padding if there are any tray icons */
1727             if (traypx > 0)
1728                 traypx += 2;
1729             xcb_copy_area(xcb_connection,
1730                           statusline_pm,
1731                           outputs_walk->buffer,
1732                           outputs_walk->bargc,
1733                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1734                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1735                           MIN(outputs_walk->rect.w - traypx - 4, (int)statusline_width), font.height + 2);
1736         }
1737
1738         if (!config.disable_ws) {
1739             i3_ws *ws_walk;
1740             TAILQ_FOREACH (ws_walk, outputs_walk->workspaces, tailq) {
1741                 DLOG("Drawing Button for WS %s at x = %d, len = %d\n",
1742                      i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1743                 uint32_t fg_color = colors.inactive_ws_fg;
1744                 uint32_t bg_color = colors.inactive_ws_bg;
1745                 uint32_t border_color = colors.inactive_ws_border;
1746                 if (ws_walk->visible) {
1747                     if (!ws_walk->focused) {
1748                         fg_color = colors.active_ws_fg;
1749                         bg_color = colors.active_ws_bg;
1750                         border_color = colors.active_ws_border;
1751                     } else {
1752                         fg_color = colors.focus_ws_fg;
1753                         bg_color = colors.focus_ws_bg;
1754                         border_color = colors.focus_ws_border;
1755                     }
1756                 }
1757                 if (ws_walk->urgent) {
1758                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1759                     fg_color = colors.urgent_ws_fg;
1760                     bg_color = colors.urgent_ws_bg;
1761                     border_color = colors.urgent_ws_border;
1762                     unhide = true;
1763                 }
1764                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1765                 uint32_t vals_border[] = {border_color, border_color};
1766                 xcb_change_gc(xcb_connection,
1767                               outputs_walk->bargc,
1768                               mask,
1769                               vals_border);
1770                 xcb_rectangle_t rect_border = {i,
1771                                                logical_px(1),
1772                                                ws_walk->name_width + logical_px(10),
1773                                                font.height + logical_px(4)};
1774                 xcb_poly_fill_rectangle(xcb_connection,
1775                                         outputs_walk->buffer,
1776                                         outputs_walk->bargc,
1777                                         1,
1778                                         &rect_border);
1779                 uint32_t vals[] = {bg_color, bg_color};
1780                 xcb_change_gc(xcb_connection,
1781                               outputs_walk->bargc,
1782                               mask,
1783                               vals);
1784                 xcb_rectangle_t rect = {i + logical_px(1),
1785                                         2 * logical_px(1),
1786                                         ws_walk->name_width + logical_px(8),
1787                                         font.height + logical_px(2)};
1788                 xcb_poly_fill_rectangle(xcb_connection,
1789                                         outputs_walk->buffer,
1790                                         outputs_walk->bargc,
1791                                         1,
1792                                         &rect);
1793                 set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1794                 draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc,
1795                           i + logical_px(5), 3 * logical_px(1), ws_walk->name_width);
1796                 i += logical_px(10) + ws_walk->name_width + logical_px(1);
1797             }
1798         }
1799
1800         if (binding.name && !config.disable_binding_mode_indicator) {
1801             uint32_t fg_color = colors.urgent_ws_fg;
1802             uint32_t bg_color = colors.urgent_ws_bg;
1803             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1804
1805             uint32_t vals_border[] = {colors.urgent_ws_border, colors.urgent_ws_border};
1806             xcb_change_gc(xcb_connection,
1807                           outputs_walk->bargc,
1808                           mask,
1809                           vals_border);
1810             xcb_rectangle_t rect_border = {i, 1, binding.width + 10, font.height + 4};
1811             xcb_poly_fill_rectangle(xcb_connection,
1812                                     outputs_walk->buffer,
1813                                     outputs_walk->bargc,
1814                                     1,
1815                                     &rect_border);
1816
1817             uint32_t vals[] = {bg_color, bg_color};
1818             xcb_change_gc(xcb_connection,
1819                           outputs_walk->bargc,
1820                           mask,
1821                           vals);
1822             xcb_rectangle_t rect = {i + 1, 2, binding.width + 8, font.height + 2};
1823             xcb_poly_fill_rectangle(xcb_connection,
1824                                     outputs_walk->buffer,
1825                                     outputs_walk->bargc,
1826                                     1,
1827                                     &rect);
1828
1829             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1830             draw_text(binding.name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 3, binding.width);
1831
1832             unhide = true;
1833         }
1834
1835         i = 0;
1836     }
1837
1838     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1839     if (mod_pressed ||
1840         config.hidden_state == S_SHOW ||
1841         unhide) {
1842         unhide_bars();
1843     } else if (config.hide_on_modifier == M_HIDE) {
1844         hide_bars();
1845     }
1846
1847     redraw_bars();
1848 }
1849
1850 /*
1851  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1852  *
1853  */
1854 void redraw_bars(void) {
1855     i3_output *outputs_walk;
1856     SLIST_FOREACH (outputs_walk, outputs, slist) {
1857         if (!outputs_walk->active) {
1858             continue;
1859         }
1860         xcb_copy_area(xcb_connection,
1861                       outputs_walk->buffer,
1862                       outputs_walk->bar,
1863                       outputs_walk->bargc,
1864                       0, 0,
1865                       0, 0,
1866                       outputs_walk->rect.w,
1867                       outputs_walk->rect.h);
1868         xcb_flush(xcb_connection);
1869     }
1870 }
1871
1872 /*
1873  * Set the current binding mode
1874  *
1875  */
1876 void set_current_mode(struct mode *current) {
1877     I3STRING_FREE(binding.name);
1878     binding = *current;
1879     activated_mode = binding.name != NULL;
1880     return;
1881 }