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 / 2;
 152                     block->x_append = padding_width / 2 + padding_width % 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 + 2 };
 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;
 189             uint32_t values[] = { colors.sep_fg, colors.bar_bg };
 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 values[1] = walk->rect.y + walk->rect.h - bar_height;
 247         values[2] = walk->rect.w;
 248         values[3] = bar_height;
 249         values[4] = XCB_STACK_MODE_ABOVE;
 250         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 251         cookie = xcb_configure_window_checked(xcb_connection,
 252                                               walk->bar,
 253                                               mask,
 254                                               values);
 255
 256         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 257             exit(EXIT_FAILURE);
 258         }
 259         xcb_map_window(xcb_connection, walk->bar);
 260     }
 261 }
 262
 263 /*
 264  * Parse the colors into a format that we can use
 265  *
 266  */
 267 void init_colors(const struct xcb_color_strings_t *new_colors) {
 268 #define PARSE_COLOR(name, def) \
 269     do { \
 270         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 271     } while  (0)
 272     PARSE_COLOR(bar_fg, "#FFFFFF");
 273     PARSE_COLOR(bar_bg, "#000000");
 274     PARSE_COLOR(sep_fg, "#666666");
 275     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 276     PARSE_COLOR(active_ws_bg, "#333333");
 277     PARSE_COLOR(active_ws_border, "#333333");
 278     PARSE_COLOR(inactive_ws_fg, "#888888");
 279     PARSE_COLOR(inactive_ws_bg, "#222222");
 280     PARSE_COLOR(inactive_ws_border, "#333333");
 281     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 282     PARSE_COLOR(urgent_ws_bg, "#900000");
 283     PARSE_COLOR(urgent_ws_border, "#2f343a");
 284     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 285     PARSE_COLOR(focus_ws_bg, "#285577");
 286     PARSE_COLOR(focus_ws_border, "#4c7899");
 287 #undef PARSE_COLOR
 288
 289     init_tray_colors();
 290     xcb_flush(xcb_connection);
 291 }
 292
 293 /*
 294  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 295  * We determine, whether the click occured on a ws-button or if the scroll-
 296  * wheel was used and change the workspace appropriately
 297  *
 298  */
 299 void handle_button(xcb_button_press_event_t *event) {
 300     i3_ws *cur_ws;
 301
 302     /* Determine, which bar was clicked */
 303     i3_output *walk;
 304     xcb_window_t bar = event->event;
 305     SLIST_FOREACH(walk, outputs, slist) {
 306         if (walk->bar == bar) {
 307             break;
 308         }
 309     }
 310
 311     if (walk == NULL) {
 312         DLOG("Unknown Bar klicked!\n");
 313         return;
 314     }
 315
 316     /* TODO: Move this to extern get_ws_for_output() */
 317     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 318         if (cur_ws->visible) {
 319             break;
 320         }
 321     }
 322
 323     if (cur_ws == NULL) {
 324         DLOG("No Workspace active?\n");
 325         return;
 326     }
 327
 328     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 329     int32_t original_x = x;
 330
 331     DLOG("Got Button %d\n", event->detail);
 332
 333     switch (event->detail) {
 334         case 4:
 335             /* Mouse wheel up. We select the previous ws, if any.
 336              * If there is no more workspace, don’t even send the workspace
 337              * command, otherwise (with workspace auto_back_and_forth) we’d end
 338              * up on the wrong workspace. */
 339             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 340                 return;
 341
 342             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 343             break;
 344         case 5:
 345             /* Mouse wheel down. We select the next ws, if any.
 346              * If there is no more workspace, don’t even send the workspace
 347              * command, otherwise (with workspace auto_back_and_forth) we’d end
 348              * up on the wrong workspace. */
 349             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 350                 return;
 351
 352             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 353             break;
 354         default:
 355             /* Check if this event regards a workspace button */
 356             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 357                 DLOG("x = %d\n", x);
 358                 if (x >= 0 && x < cur_ws->name_width + 10) {
 359                     break;
 360                 }
 361                 x -= cur_ws->name_width + 11;
 362             }
 363             if (cur_ws == NULL) {
 364                 /* No workspace button was pressed.
 365                  * Check if a status block has been clicked.
 366                  * This of course only has an effect,
 367                  * if the child reported bidirectional protocol usage. */
 368
 369                 /* First calculate width of tray area */
 370                 trayclient *trayclient;
 371                 int tray_width = 0;
 372                 TAILQ_FOREACH_REVERSE(trayclient, walk->trayclients, tc_head, tailq) {
 373                     if (!trayclient->mapped)
 374                         continue;
 375                     tray_width += (font.height + 2);
 376                 }
 377
 378                 int block_x = 0, last_block_x;
 379                 int offset = (walk->rect.w - (statusline_width + tray_width)) - 10;
 380
 381                 x = original_x - offset;
 382                 if (x < 0)
 383                     return;
 384
 385                 struct status_block *block;
 386
 387                 TAILQ_FOREACH(block, &statusline_head, blocks) {
 388                     last_block_x = block_x;
 389                     block_x += block->width + block->x_offset + block->x_append;
 390
 391                     if (x <= block_x && x >= last_block_x) {
 392                         send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 393                         return;
 394                     }
 395                 }
 396                 return;
 397             }
 398             if (event->detail != 1)
 399                 return;
 400     }
 401
 402     /* To properly handle workspace names with double quotes in them, we need
 403      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 404      * first count the number of double quotes, then we allocate a large enough
 405      * buffer, then we copy character by character. */
 406     int num_quotes = 0;
 407     size_t namelen = 0;
 408     const char *utf8_name = i3string_as_utf8(cur_ws->name);
 409     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 410         if (*walk == '"')
 411             num_quotes++;
 412         /* While we’re looping through the name anyway, we can save one
 413          * strlen(). */
 414         namelen++;
 415     }
 416
 417     const size_t len = namelen + strlen("workspace \"\"") + 1;
 418     char *buffer = scalloc(len+num_quotes);
 419     strncpy(buffer, "workspace \"", strlen("workspace \""));
 420     int inpos, outpos;
 421     for (inpos = 0, outpos = strlen("workspace \"");
 422          inpos < namelen;
 423          inpos++, outpos++) {
 424         if (utf8_name[inpos] == '"') {
 425             buffer[outpos] = '\\';
 426             outpos++;
 427         }
 428         buffer[outpos] = utf8_name[inpos];
 429     }
 430     buffer[outpos] = '"';
 431     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 432     free(buffer);
 433 }
 434
 435 /*
 436  * Adjusts the size of the tray window and alignment of the tray clients by
 437  * configuring their respective x coordinates. To be called when mapping or
 438  * unmapping a tray client window.
 439  *
 440  */
 441 static void configure_trayclients(void) {
 442     trayclient *trayclient;
 443     i3_output *output;
 444     SLIST_FOREACH(output, outputs, slist) {
 445         if (!output->active)
 446             continue;
 447
 448         int clients = 0;
 449         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 450             if (!trayclient->mapped)
 451                 continue;
 452             clients++;
 453
 454             DLOG("Configuring tray window %08x to x=%d\n",
 455                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 456             uint32_t x = output->rect.w - (clients * (font.height + 2));
 457             xcb_configure_window(xcb_connection,
 458                                  trayclient->win,
 459                                  XCB_CONFIG_WINDOW_X,
 460                                  &x);
 461         }
 462     }
 463 }
 464
 465 /*
 466  * Handles ClientMessages (messages sent from another client directly to us).
 467  *
 468  * At the moment, only the tray window will receive client messages. All
 469  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 470  *
 471  */
 472 static void handle_client_message(xcb_client_message_event_t* event) {
 473     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 474         event->format == 32) {
 475         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 476         /* event->data.data32[0] is the timestamp */
 477         uint32_t op = event->data.data32[1];
 478         uint32_t mask;
 479         uint32_t values[2];
 480         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 481             xcb_window_t client = event->data.data32[2];
 482
 483             /* Listen for PropertyNotify events to get the most recent value of
 484              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 485             mask = XCB_CW_EVENT_MASK;
 486             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 487                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 488             xcb_change_window_attributes(xcb_connection,
 489                                          client,
 490                                          mask,
 491                                          values);
 492
 493             /* Request the _XEMBED_INFO property. The XEMBED specification
 494              * (which is referred by the tray specification) says this *has* to
 495              * be set, but VLC does not set it… */
 496             bool map_it = true;
 497             int xe_version = 1;
 498             xcb_get_property_cookie_t xembedc;
 499             xcb_generic_error_t *error;
 500             xembedc = xcb_get_property(xcb_connection,
 501                                        0,
 502                                        client,
 503                                        atoms[_XEMBED_INFO],
 504                                        XCB_GET_PROPERTY_TYPE_ANY,
 505                                        0,
 506                                        2 * 32);
 507
 508             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 509                                                                        xembedc,
 510                                                                        &error);
 511             if (error != NULL) {
 512                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 513                      error->error_code);
 514                 free(error);
 515                 return;
 516             }
 517             if (xembedr != NULL && xembedr->length != 0) {
 518                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 519                 uint32_t *xembed = xcb_get_property_value(xembedr);
 520                 DLOG("xembed version = %d\n", xembed[0]);
 521                 DLOG("xembed flags = %d\n", xembed[1]);
 522                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 523                 xe_version = xembed[0];
 524                 if (xe_version > 1)
 525                     xe_version = 1;
 526                 free(xembedr);
 527             } else {
 528                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 529             }
 530
 531             DLOG("X window %08x requested docking\n", client);
 532             i3_output *walk, *output = NULL;
 533             SLIST_FOREACH(walk, outputs, slist) {
 534                 if (!walk->active)
 535                     continue;
 536                 if (config.tray_output) {
 537                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 538                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 539                         continue;
 540                 }
 541
 542                 DLOG("using output %s\n", walk->name);
 543                 output = walk;
 544                 break;
 545             }
 546             /* In case of tray_output == primary and there is no primary output
 547              * configured, we fall back to the first available output. */
 548             if (output == NULL &&
 549                 config.tray_output &&
 550                 strcasecmp("primary", config.tray_output) == 0) {
 551                 SLIST_FOREACH(walk, outputs, slist) {
 552                     if (!walk->active)
 553                         continue;
 554                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 555                     output = walk;
 556                     break;
 557                 }
 558             }
 559             if (output == NULL) {
 560                 ELOG("No output found\n");
 561                 return;
 562             }
 563             xcb_reparent_window(xcb_connection,
 564                                 client,
 565                                 output->bar,
 566                                 output->rect.w - font.height - 2,
 567                                 2);
 568             /* We reconfigure the window to use a reasonable size. The systray
 569              * specification explicitly says:
 570              *   Tray icons may be assigned any size by the system tray, and
 571              *   should do their best to cope with any size effectively
 572              */
 573             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 574             values[0] = font.height;
 575             values[1] = font.height;
 576             xcb_configure_window(xcb_connection,
 577                                  client,
 578                                  mask,
 579                                  values);
 580
 581             /* send the XEMBED_EMBEDDED_NOTIFY message */
 582             void *event = scalloc(32);
 583             xcb_client_message_event_t *ev = event;
 584             ev->response_type = XCB_CLIENT_MESSAGE;
 585             ev->window = client;
 586             ev->type = atoms[_XEMBED];
 587             ev->format = 32;
 588             ev->data.data32[0] = XCB_CURRENT_TIME;
 589             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 590             ev->data.data32[2] = output->bar;
 591             ev->data.data32[3] = xe_version;
 592             xcb_send_event(xcb_connection,
 593                            0,
 594                            client,
 595                            XCB_EVENT_MASK_NO_EVENT,
 596                            (char*)ev);
 597             free(event);
 598
 599             /* Put the client inside the save set. Upon termination (whether
 600              * killed or normal exit does not matter) of i3bar, these clients
 601              * will be correctly reparented to their most closest living
 602              * ancestor. Without this, tray icons might die when i3bar
 603              * exits/crashes. */
 604             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 605
 606             if (map_it) {
 607                 DLOG("Mapping dock client\n");
 608                 xcb_map_window(xcb_connection, client);
 609             } else {
 610                 DLOG("Not mapping dock client yet\n");
 611             }
 612             trayclient *tc = smalloc(sizeof(trayclient));
 613             tc->win = client;
 614             tc->xe_version = xe_version;
 615             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 616
 617             /* Trigger an update to copy the statusline text to the appropriate
 618              * position */
 619             configure_trayclients();
 620             draw_bars(false);
 621         }
 622     }
 623 }
 624
 625 /*
 626  * Handles DestroyNotify events by removing the tray client from the data
 627  * structure. According to the XEmbed protocol, this is one way for a tray
 628  * client to finish the protocol. After this event is received, there is no
 629  * further interaction with the tray client.
 630  *
 631  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 632  *
 633  */
 634 static void handle_destroy_notify(xcb_destroy_notify_event_t* event) {
 635     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 636
 637     i3_output *walk;
 638     SLIST_FOREACH(walk, outputs, slist) {
 639         if (!walk->active)
 640             continue;
 641         DLOG("checking output %s\n", walk->name);
 642         trayclient *trayclient;
 643         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 644             if (trayclient->win != event->window)
 645                 continue;
 646
 647             DLOG("Removing tray client with window ID %08x\n", event->window);
 648             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 649
 650             /* Trigger an update, we now have more space for the statusline */
 651             configure_trayclients();
 652             draw_bars(false);
 653             return;
 654         }
 655     }
 656 }
 657
 658 /*
 659  * Handles MapNotify events. These events happen when a tray client shows its
 660  * window. We respond by realigning the tray clients.
 661  *
 662  */
 663 static void handle_map_notify(xcb_map_notify_event_t* event) {
 664     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 665
 666     i3_output *walk;
 667     SLIST_FOREACH(walk, outputs, slist) {
 668         if (!walk->active)
 669             continue;
 670         DLOG("checking output %s\n", walk->name);
 671         trayclient *trayclient;
 672         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 673             if (trayclient->win != event->window)
 674                 continue;
 675
 676             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 677             trayclient->mapped = true;
 678
 679             /* Trigger an update, we now have more space for the statusline */
 680             configure_trayclients();
 681             draw_bars(false);
 682             return;
 683         }
 684     }
 685 }
 686 /*
 687  * Handles UnmapNotify events. These events happen when a tray client hides its
 688  * window. We respond by realigning the tray clients.
 689  *
 690  */
 691 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 692     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 693
 694     i3_output *walk;
 695     SLIST_FOREACH(walk, outputs, slist) {
 696         if (!walk->active)
 697             continue;
 698         DLOG("checking output %s\n", walk->name);
 699         trayclient *trayclient;
 700         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 701             if (trayclient->win != event->window)
 702                 continue;
 703
 704             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 705             trayclient->mapped = false;
 706
 707             /* Trigger an update, we now have more space for the statusline */
 708             configure_trayclients();
 709             draw_bars(false);
 710             return;
 711         }
 712     }
 713 }
 714
 715 /*
 716  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 717  * handled, which tells us whether a dock client should be mapped or unmapped.
 718  *
 719  */
 720 static void handle_property_notify(xcb_property_notify_event_t *event) {
 721     DLOG("PropertyNotify\n");
 722     if (event->atom == atoms[_XEMBED_INFO] &&
 723         event->state == XCB_PROPERTY_NEW_VALUE) {
 724         DLOG("xembed_info updated\n");
 725         trayclient *trayclient = NULL, *walk;
 726         i3_output *o_walk;
 727         SLIST_FOREACH(o_walk, outputs, slist) {
 728             if (!o_walk->active)
 729                 continue;
 730
 731             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 732                 if (walk->win != event->window)
 733                     continue;
 734                 trayclient = walk;
 735                 break;
 736             }
 737
 738             if (trayclient)
 739                 break;
 740         }
 741         if (!trayclient) {
 742             ELOG("PropertyNotify received for unknown window %08x\n",
 743                  event->window);
 744             return;
 745         }
 746         xcb_get_property_cookie_t xembedc;
 747         xembedc = xcb_get_property_unchecked(xcb_connection,
 748                                              0,
 749                                              trayclient->win,
 750                                              atoms[_XEMBED_INFO],
 751                                              XCB_GET_PROPERTY_TYPE_ANY,
 752                                              0,
 753                                              2 * 32);
 754
 755         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 756                                                                    xembedc,
 757                                                                    NULL);
 758         if (xembedr == NULL || xembedr->length == 0) {
 759             DLOG("xembed_info unset\n");
 760             return;
 761         }
 762
 763         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 764         uint32_t *xembed = xcb_get_property_value(xembedr);
 765         DLOG("xembed version = %d\n", xembed[0]);
 766         DLOG("xembed flags = %d\n", xembed[1]);
 767         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 768         DLOG("map-state now %d\n", map_it);
 769         if (trayclient->mapped && !map_it) {
 770             /* need to unmap the window */
 771             xcb_unmap_window(xcb_connection, trayclient->win);
 772         } else if (!trayclient->mapped && map_it) {
 773             /* need to map the window */
 774             xcb_map_window(xcb_connection, trayclient->win);
 775         }
 776         free(xembedr);
 777     }
 778 }
 779
 780 /*
 781  * Handle ConfigureRequests by denying them and sending the client a
 782  * ConfigureNotify with its actual size.
 783  *
 784  */
 785 static void handle_configure_request(xcb_configure_request_event_t *event) {
 786     DLOG("ConfigureRequest for window = %08x\n", event->window);
 787
 788     trayclient *trayclient;
 789     i3_output *output;
 790     SLIST_FOREACH(output, outputs, slist) {
 791         if (!output->active)
 792             continue;
 793
 794         int clients = 0;
 795         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 796             if (!trayclient->mapped)
 797                 continue;
 798             clients++;
 799
 800             if (trayclient->win != event->window)
 801                 continue;
 802
 803             xcb_rectangle_t rect;
 804             rect.x = output->rect.w - (clients * (font.height + 2));
 805             rect.y = 2;
 806             rect.width = font.height;
 807             rect.height = font.height;
 808
 809             DLOG("This is a tray window. x = %d\n", rect.x);
 810             fake_configure_notify(xcb_connection, rect, event->window, 0);
 811             return;
 812         }
 813     }
 814
 815     DLOG("WARNING: Could not find corresponding tray window.\n");
 816 }
 817
 818 /*
 819  * This function is called immediately before the main loop locks. We flush xcb
 820  * then (and only then)
 821  *
 822  */
 823 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 824     xcb_flush(xcb_connection);
 825 }
 826
 827 /*
 828  * This function is called immediately after the main loop locks, so when one
 829  * of the watchers registered an event.
 830  * We check whether an X-Event arrived and handle it.
 831  *
 832  */
 833 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 834     xcb_generic_event_t *event;
 835
 836     if (xcb_connection_has_error(xcb_connection)) {
 837         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 838         exit(1);
 839     }
 840
 841     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 842         switch (event->response_type & ~0x80) {
 843             case XCB_EXPOSE:
 844                 /* Expose-events happen, when the window needs to be redrawn */
 845                 redraw_bars();
 846                 break;
 847             case XCB_BUTTON_PRESS:
 848                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 849                 handle_button((xcb_button_press_event_t*) event);
 850                 break;
 851             case XCB_CLIENT_MESSAGE:
 852                 /* Client messages are used for client-to-client communication, for
 853                  * example system tray widgets talk to us directly via client messages. */
 854                 handle_client_message((xcb_client_message_event_t*) event);
 855                 break;
 856             case XCB_DESTROY_NOTIFY:
 857                 /* DestroyNotify signifies the end of the XEmbed protocol */
 858                 handle_destroy_notify((xcb_destroy_notify_event_t*) event);
 859                 break;
 860             case XCB_UNMAP_NOTIFY:
 861                 /* UnmapNotify is received when a tray client hides its window. */
 862                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 863                 break;
 864             case XCB_MAP_NOTIFY:
 865                 handle_map_notify((xcb_map_notify_event_t*) event);
 866                 break;
 867             case XCB_PROPERTY_NOTIFY:
 868                 /* PropertyNotify */
 869                 handle_property_notify((xcb_property_notify_event_t*) event);
 870                 break;
 871             case XCB_CONFIGURE_REQUEST:
 872                 /* ConfigureRequest, sent by a tray child */
 873                 handle_configure_request((xcb_configure_request_event_t*) event);
 874                 break;
 875         }
 876         free(event);
 877     }
 878 }
 879
 880 /*
 881  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 882  * are triggered
 883  *
 884  */
 885 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 886 }
 887
 888 /*
 889  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 890  *
 891  */
 892 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 893     XkbEvent ev;
 894     int modstate = 0;
 895
 896     DLOG("Got XKB-Event!\n");
 897
 898     while (XPending(xkb_dpy)) {
 899         XNextEvent(xkb_dpy, (XEvent*)&ev);
 900
 901         if (ev.type != xkb_event_base) {
 902             ELOG("No Xkb-Event!\n");
 903             continue;
 904         }
 905
 906         if (ev.any.xkb_type != XkbStateNotify) {
 907             ELOG("No State Notify!\n");
 908             continue;
 909         }
 910
 911         unsigned int mods = ev.state.mods;
 912         modstate = mods & config.modifier;
 913     }
 914
 915 #define DLOGMOD(modmask, status) \
 916     do { \
 917         switch (modmask) { \
 918             case ShiftMask: \
 919                 DLOG("ShiftMask got " #status "!\n"); \
 920                 break; \
 921             case ControlMask: \
 922                 DLOG("ControlMask got " #status "!\n"); \
 923                 break; \
 924             case Mod1Mask: \
 925                 DLOG("Mod1Mask got " #status "!\n"); \
 926                 break; \
 927             case Mod2Mask: \
 928                 DLOG("Mod2Mask got " #status "!\n"); \
 929                 break; \
 930             case Mod3Mask: \
 931                 DLOG("Mod3Mask got " #status "!\n"); \
 932                 break; \
 933             case Mod4Mask: \
 934                 DLOG("Mod4Mask got " #status "!\n"); \
 935                 break; \
 936             case Mod5Mask: \
 937                 DLOG("Mod5Mask got " #status "!\n"); \
 938                 break; \
 939         } \
 940     } while (0)
 941
 942     if (modstate != mod_pressed) {
 943         if (modstate == 0) {
 944             DLOGMOD(config.modifier, released);
 945             if (!activated_mode)
 946                 hide_bars();
 947         } else {
 948             DLOGMOD(config.modifier, pressed);
 949             activated_mode = false;
 950             unhide_bars();
 951         }
 952         mod_pressed = modstate;
 953     }
 954
 955 #undef DLOGMOD
 956 }
 957
 958 /*
 959  * Early initialization of the connection to X11: Everything which does not
 960  * depend on 'config'.
 961  *
 962  */
 963 char *init_xcb_early() {
 964     /* FIXME: xcb_connect leaks Memory */
 965     xcb_connection = xcb_connect(NULL, &screen);
 966     if (xcb_connection_has_error(xcb_connection)) {
 967         ELOG("Cannot open display\n");
 968         exit(EXIT_FAILURE);
 969     }
 970     conn = xcb_connection;
 971     DLOG("Connected to xcb\n");
 972
 973     /* We have to request the atoms we need */
 974     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 975     #include "xcb_atoms.def"
 976
 977     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 978     xcb_root = root_screen->root;
 979
 980     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 981      * this way, we can choose to crop it */
 982     uint32_t mask = XCB_GC_FOREGROUND;
 983     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 984
 985     statusline_clear = xcb_generate_id(xcb_connection);
 986     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 987                                                                statusline_clear,
 988                                                                xcb_root,
 989                                                                mask,
 990                                                                vals);
 991
 992     statusline_ctx = xcb_generate_id(xcb_connection);
 993     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 994                                                             statusline_ctx,
 995                                                             xcb_root,
 996                                                             0,
 997                                                             NULL);
 998
 999     statusline_pm = xcb_generate_id(xcb_connection);
1000     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1001                                                                root_screen->root_depth,
1002                                                                statusline_pm,
1003                                                                xcb_root,
1004                                                                root_screen->width_in_pixels,
1005                                                                root_screen->height_in_pixels);
1006
1007
1008     /* The various Watchers to communicate with xcb */
1009     xcb_io = smalloc(sizeof(ev_io));
1010     xcb_prep = smalloc(sizeof(ev_prepare));
1011     xcb_chk = smalloc(sizeof(ev_check));
1012
1013     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1014     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1015     ev_check_init(xcb_chk, &xcb_chk_cb);
1016
1017     ev_io_start(main_loop, xcb_io);
1018     ev_prepare_start(main_loop, xcb_prep);
1019     ev_check_start(main_loop, xcb_chk);
1020
1021     /* Now we get the atoms and save them in a nice data structure */
1022     get_atoms();
1023
1024     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1025
1026     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1027         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1028         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1029         exit(EXIT_FAILURE);
1030     }
1031
1032     return path;
1033 }
1034
1035 /*
1036  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key-events
1037  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1038  * in xcb.
1039  *
1040  */
1041 void register_xkb_keyevents() {
1042     if (xkb_dpy == NULL) {
1043         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
1044         xkb_major = XkbMajorVersion;
1045         xkb_minor = XkbMinorVersion;
1046
1047         xkb_dpy = XkbOpenDisplay(NULL,
1048                                  &xkb_event_base,
1049                                  &xkb_errbase,
1050                                  &xkb_major,
1051                                  &xkb_minor,
1052                                  &xkb_err);
1053
1054         if (xkb_dpy == NULL) {
1055             ELOG("No XKB!\n");
1056             exit(EXIT_FAILURE);
1057         }
1058
1059         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
1060             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
1061             exit(EXIT_FAILURE);
1062         }
1063
1064         int i1;
1065         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
1066             ELOG("XKB not supported by X-server!\n");
1067             exit(EXIT_FAILURE);
1068         }
1069
1070         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
1071             ELOG("Could not grab Key!\n");
1072             exit(EXIT_FAILURE);
1073         }
1074
1075         xkb_io = smalloc(sizeof(ev_io));
1076         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
1077         ev_io_start(main_loop, xkb_io);
1078         XFlush(xkb_dpy);
1079     }
1080 }
1081
1082 /*
1083  * Deregister from xkb keyevents.
1084  *
1085  */
1086 void deregister_xkb_keyevents() {
1087     if (xkb_dpy != NULL) {
1088         ev_io_stop (main_loop, xkb_io);
1089         XCloseDisplay(xkb_dpy);
1090         close(xkb_io->fd);
1091         FREE(xkb_io);
1092         xkb_dpy = NULL;
1093     }
1094 }
1095
1096 /*
1097  * Initialization which depends on 'config' being usable. Called after the
1098  * configuration has arrived.
1099  *
1100  */
1101 void init_xcb_late(char *fontname) {
1102     if (fontname == NULL)
1103         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1104
1105     /* Load the font */
1106     font = load_font(fontname, true);
1107     set_font(&font);
1108     DLOG("Calculated Font-height: %d\n", font.height);
1109     bar_height = font.height + 6;
1110
1111     xcb_flush(xcb_connection);
1112
1113     if (config.hide_on_modifier == M_HIDE)
1114         register_xkb_keyevents();
1115 }
1116
1117 /*
1118  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1119  * selection.
1120  *
1121  */
1122 static void send_tray_clientmessage(void) {
1123     uint8_t buffer[32] = { 0 };
1124     xcb_client_message_event_t *ev = (xcb_client_message_event_t*)buffer;
1125
1126     ev->response_type = XCB_CLIENT_MESSAGE;
1127     ev->window = xcb_root;
1128     ev->type = atoms[MANAGER];
1129     ev->format = 32;
1130     ev->data.data32[0] = XCB_CURRENT_TIME;
1131     ev->data.data32[1] = tray_reply->atom;
1132     ev->data.data32[2] = selwin;
1133
1134     xcb_send_event(xcb_connection,
1135                    0,
1136                    xcb_root,
1137                    0xFFFFFF,
1138                    (char*)buffer);
1139 }
1140
1141
1142 /*
1143  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1144  * for the X11 display we are running on, then acquiring the selection for this
1145  * atom. Afterwards, tray clients will send ClientMessages to our window.
1146  *
1147  */
1148 void init_tray(void) {
1149     DLOG("Initializing system tray functionality\n");
1150     /* request the tray manager atom for the X11 display we are running on */
1151     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1152     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1153     xcb_intern_atom_cookie_t tray_cookie;
1154     if (tray_reply == NULL)
1155         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1156
1157     /* tray support: we need a window to own the selection */
1158     selwin = xcb_generate_id(xcb_connection);
1159     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1160     uint32_t selval[] = { 1 };
1161     xcb_create_window(xcb_connection,
1162                       root_screen->root_depth,
1163                       selwin,
1164                       xcb_root,
1165                       -1, -1,
1166                       1, 1,
1167                       0,
1168                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1169                       root_screen->root_visual,
1170                       selmask,
1171                       selval);
1172
1173     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1174     /* set the atoms */
1175     xcb_change_property(xcb_connection,
1176                         XCB_PROP_MODE_REPLACE,
1177                         selwin,
1178                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1179                         XCB_ATOM_CARDINAL,
1180                         32,
1181                         1,
1182                         &orientation);
1183
1184     init_tray_colors();
1185
1186     if (tray_reply == NULL) {
1187         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1188             ELOG("Could not get atom %s\n", atomname);
1189             exit(EXIT_FAILURE);
1190         }
1191     }
1192
1193     xcb_set_selection_owner(xcb_connection,
1194                             selwin,
1195                             tray_reply->atom,
1196                             XCB_CURRENT_TIME);
1197
1198     /* Verify that we have the selection */
1199     xcb_get_selection_owner_cookie_t selcookie;
1200     xcb_get_selection_owner_reply_t *selreply;
1201
1202     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1203     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1204         ELOG("Could not get selection owner for %s\n", atomname);
1205         exit(EXIT_FAILURE);
1206     }
1207
1208     if (selreply->owner != selwin) {
1209         ELOG("Could not set the %s selection. " \
1210              "Maybe another tray is already running?\n", atomname);
1211         /* NOTE that this error is not fatal. We just can’t provide tray
1212          * functionality */
1213         free(selreply);
1214         return;
1215     }
1216
1217     send_tray_clientmessage();
1218 }
1219
1220 /*
1221  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1222  * to make GTK+ 3 applets with Symbolic Icons visible. If the colors are unset,
1223  * they assume a light background.
1224  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1225  *
1226  */
1227 void init_tray_colors(void) {
1228     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1229     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1230
1231     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1232
1233     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1234                             {bar_fg[3], bar_fg[4], '\0'},
1235                             {bar_fg[5], bar_fg[6], '\0'}};
1236     const uint8_t r = strtol(strgroups[0], NULL, 16);
1237     const uint8_t g = strtol(strgroups[1], NULL, 16);
1238     const uint8_t b = strtol(strgroups[2], NULL, 16);
1239
1240     const uint16_t r16 = ((uint16_t)r << 8) | r;
1241     const uint16_t g16 = ((uint16_t)g << 8) | g;
1242     const uint16_t b16 = ((uint16_t)b << 8) | b;
1243
1244     const uint32_t tray_colors[12] = {
1245         r16, g16, b16, /* foreground color */
1246         r16, g16, b16, /* error color */
1247         r16, g16, b16, /* warning color */
1248         r16, g16, b16, /* success color */
1249     };
1250
1251     xcb_change_property(xcb_connection,
1252                         XCB_PROP_MODE_REPLACE,
1253                         selwin,
1254                         atoms[_NET_SYSTEM_TRAY_COLORS],
1255                         XCB_ATOM_CARDINAL,
1256                         32,
1257                         12,
1258                         tray_colors);
1259 }
1260
1261 /*
1262  * Cleanup the xcb-stuff.
1263  * Called once, before the program terminates.
1264  *
1265  */
1266 void clean_xcb(void) {
1267     i3_output *o_walk;
1268     free_workspaces();
1269     SLIST_FOREACH(o_walk, outputs, slist) {
1270         destroy_window(o_walk);
1271         FREE(o_walk->trayclients);
1272         FREE(o_walk->workspaces);
1273         FREE(o_walk->name);
1274     }
1275     FREE_SLIST(outputs, i3_output);
1276     FREE(outputs);
1277
1278     xcb_flush(xcb_connection);
1279     xcb_disconnect(xcb_connection);
1280
1281     ev_check_stop(main_loop, xcb_chk);
1282     ev_prepare_stop(main_loop, xcb_prep);
1283     ev_io_stop(main_loop, xcb_io);
1284
1285     FREE(xcb_chk);
1286     FREE(xcb_prep);
1287     FREE(xcb_io);
1288 }
1289
1290 /*
1291  * Get the earlier requested atoms and save them in the prepared data structure
1292  *
1293  */
1294 void get_atoms(void) {
1295     xcb_intern_atom_reply_t *reply;
1296     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1297         if (reply == NULL) { \
1298             ELOG("Could not get atom %s\n", #name); \
1299             exit(EXIT_FAILURE); \
1300         } \
1301         atoms[name] = reply->atom; \
1302         free(reply);
1303
1304     #include "xcb_atoms.def"
1305     DLOG("Got Atoms\n");
1306 }
1307
1308 /*
1309  * Reparents all tray clients of the specified output to the root window. This
1310  * is either used when shutting down, when an output appears (xrandr --output
1311  * VGA1 --off) or when the primary output changes.
1312  *
1313  * Applications using the tray will start the protocol from the beginning again
1314  * afterwards.
1315  *
1316  */
1317 void kick_tray_clients(i3_output *output) {
1318     if (TAILQ_EMPTY(output->trayclients))
1319         return;
1320
1321     trayclient *trayclient;
1322     while (!TAILQ_EMPTY(output->trayclients)) {
1323         trayclient = TAILQ_FIRST(output->trayclients);
1324         /* Unmap, then reparent (to root) the tray client windows */
1325         xcb_unmap_window(xcb_connection, trayclient->win);
1326         xcb_reparent_window(xcb_connection,
1327                             trayclient->win,
1328                             xcb_root,
1329                             0,
1330                             0);
1331
1332         /* We remove the trayclient right here. We might receive an UnmapNotify
1333          * event afterwards, but better safe than sorry. */
1334         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1335     }
1336
1337     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1338      * We cannot actually destroy the window because then Qt will not restore
1339      * its event mask on the new window. */
1340     uint8_t buffer[32] = { 0 };
1341     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t*)buffer;
1342
1343     event->response_type = XCB_DESTROY_NOTIFY;
1344     event->event = selwin;
1345     event->window = selwin;
1346
1347     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)event);
1348
1349     send_tray_clientmessage();
1350 }
1351
1352 /*
1353  * Destroy the bar of the specified output
1354  *
1355  */
1356 void destroy_window(i3_output *output) {
1357     if (output == NULL) {
1358         return;
1359     }
1360     if (output->bar == XCB_NONE) {
1361         return;
1362     }
1363
1364     kick_tray_clients(output);
1365     xcb_destroy_window(xcb_connection, output->bar);
1366     output->bar = XCB_NONE;
1367 }
1368
1369 /*
1370  * Reallocate the statusline-buffer
1371  *
1372  */
1373 void realloc_sl_buffer(void) {
1374     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1375          statusline_width, root_screen->width_in_pixels);
1376     xcb_free_pixmap(xcb_connection, statusline_pm);
1377     statusline_pm = xcb_generate_id(xcb_connection);
1378     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1379                                                                root_screen->root_depth,
1380                                                                statusline_pm,
1381                                                                xcb_root,
1382                                                                MAX(root_screen->width_in_pixels, statusline_width),
1383                                                                bar_height);
1384
1385     uint32_t mask = XCB_GC_FOREGROUND;
1386     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1387     xcb_free_gc(xcb_connection, statusline_clear);
1388     statusline_clear = xcb_generate_id(xcb_connection);
1389     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1390                                                                statusline_clear,
1391                                                                xcb_root,
1392                                                                mask,
1393                                                                vals);
1394
1395     mask |= XCB_GC_BACKGROUND;
1396     vals[0] = colors.bar_fg;
1397     statusline_ctx = xcb_generate_id(xcb_connection);
1398     xcb_free_gc(xcb_connection, statusline_ctx);
1399     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1400                                                             statusline_ctx,
1401                                                             xcb_root,
1402                                                             mask,
1403                                                             vals);
1404
1405     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1406         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1407         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1408         exit(EXIT_FAILURE);
1409     }
1410
1411 }
1412
1413 /*
1414  * Reconfigure all bars and create new bars for recently activated outputs
1415  *
1416  */
1417 void reconfig_windows(bool redraw_bars) {
1418     uint32_t mask;
1419     uint32_t values[5];
1420     static bool tray_configured = false;
1421
1422     i3_output *walk;
1423     SLIST_FOREACH(walk, outputs, slist) {
1424         if (!walk->active) {
1425             /* If an output is not active, we destroy its bar */
1426             /* FIXME: Maybe we rather want to unmap? */
1427             DLOG("Destroying window for output %s\n", walk->name);
1428             destroy_window(walk);
1429             continue;
1430         }
1431         if (walk->bar == XCB_NONE) {
1432             DLOG("Creating Window for output %s\n", walk->name);
1433
1434             walk->bar = xcb_generate_id(xcb_connection);
1435             walk->buffer = xcb_generate_id(xcb_connection);
1436             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1437             /* Black background */
1438             values[0] = colors.bar_bg;
1439             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar-windows */
1440             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1441             /* We enable the following EventMask fields:
1442              * EXPOSURE, to get expose events (we have to re-draw then)
1443              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1444              *                        child windows use ConfigureWindow
1445              * BUTTON_PRESS, to handle clicks on the workspace buttons
1446              * */
1447             values[2] = XCB_EVENT_MASK_EXPOSURE |
1448                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1449             if (!config.disable_ws) {
1450                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1451             }
1452             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1453                                                                      root_screen->root_depth,
1454                                                                      walk->bar,
1455                                                                      xcb_root,
1456                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1457                                                                      walk->rect.w, bar_height,
1458                                                                      0,
1459                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1460                                                                      root_screen->root_visual,
1461                                                                      mask,
1462                                                                      values);
1463
1464             /* The double-buffer we use to render stuff off-screen */
1465             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1466                                                                     root_screen->root_depth,
1467                                                                     walk->buffer,
1468                                                                     walk->bar,
1469                                                                     walk->rect.w,
1470                                                                     bar_height);
1471
1472             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1473             xcb_void_cookie_t class_cookie;
1474             class_cookie = xcb_change_property(xcb_connection,
1475                                                XCB_PROP_MODE_REPLACE,
1476                                                walk->bar,
1477                                                XCB_ATOM_WM_CLASS,
1478                                                XCB_ATOM_STRING,
1479                                                8,
1480                                                (strlen("i3bar") + 1) * 2,
1481                                                "i3bar\0i3bar\0");
1482
1483             char *name;
1484             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1485                 err(EXIT_FAILURE, "asprintf()");
1486             xcb_void_cookie_t name_cookie;
1487             name_cookie = xcb_change_property(xcb_connection,
1488                                               XCB_PROP_MODE_REPLACE,
1489                                               walk->bar,
1490                                               XCB_ATOM_WM_NAME,
1491                                               XCB_ATOM_STRING,
1492                                               8,
1493                                               strlen(name),
1494                                               name);
1495             free(name);
1496
1497             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1498              * this one */
1499             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1500                                                                 XCB_PROP_MODE_REPLACE,
1501                                                                 walk->bar,
1502                                                                 atoms[_NET_WM_WINDOW_TYPE],
1503                                                                 XCB_ATOM_ATOM,
1504                                                                 32,
1505                                                                 1,
1506                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1507
1508             /* We need to tell i3, where to reserve space for i3bar */
1509             /* left, right, top, bottom, left_start_y, left_end_y,
1510              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1511              * bottom_end_x */
1512             /* A local struct to save the strut_partial property */
1513             struct {
1514                 uint32_t left;
1515                 uint32_t right;
1516                 uint32_t top;
1517                 uint32_t bottom;
1518                 uint32_t left_start_y;
1519                 uint32_t left_end_y;
1520                 uint32_t right_start_y;
1521                 uint32_t right_end_y;
1522                 uint32_t top_start_x;
1523                 uint32_t top_end_x;
1524                 uint32_t bottom_start_x;
1525                 uint32_t bottom_end_x;
1526             } __attribute__((__packed__)) strut_partial = {0,};
1527             switch (config.position) {
1528                 case POS_NONE:
1529                     break;
1530                 case POS_TOP:
1531                     strut_partial.top = bar_height;
1532                     strut_partial.top_start_x = walk->rect.x;
1533                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1534                     break;
1535                 case POS_BOT:
1536                     strut_partial.bottom = bar_height;
1537                     strut_partial.bottom_start_x = walk->rect.x;
1538                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1539                     break;
1540             }
1541             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1542                                                                  XCB_PROP_MODE_REPLACE,
1543                                                                  walk->bar,
1544                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1545                                                                  XCB_ATOM_CARDINAL,
1546                                                                  32,
1547                                                                  12,
1548                                                                  &strut_partial);
1549
1550             /* We also want a graphics-context for the bars (it defines the properties
1551              * with which we draw to them) */
1552             walk->bargc = xcb_generate_id(xcb_connection);
1553             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1554                                                                 walk->bargc,
1555                                                                 walk->bar,
1556                                                                 0,
1557                                                                 NULL);
1558
1559             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1560             xcb_void_cookie_t map_cookie;
1561             if (config.hide_on_modifier == M_DOCK) {
1562                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1563             }
1564
1565             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1566                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1567                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1568                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1569                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1570                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1571                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1572                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1573                 exit(EXIT_FAILURE);
1574             }
1575
1576             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1577             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1578                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1579                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1580                  * VGA-1 but output == [HDMI-1]).
1581                  */
1582                 i3_output *output;
1583                 SLIST_FOREACH(output, outputs, slist) {
1584                     if (strcasecmp(output->name, tray_output) == 0 ||
1585                             (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1586                         init_tray();
1587                         break;
1588                     }
1589                 }
1590                 tray_configured = true;
1591             }
1592         } else {
1593             /* We already have a bar, so we just reconfigure it */
1594             mask = XCB_CONFIG_WINDOW_X |
1595                    XCB_CONFIG_WINDOW_Y |
1596                    XCB_CONFIG_WINDOW_WIDTH |
1597                    XCB_CONFIG_WINDOW_HEIGHT |
1598                    XCB_CONFIG_WINDOW_STACK_MODE;
1599             values[0] = walk->rect.x;
1600             values[1] = walk->rect.y + walk->rect.h - bar_height;
1601             values[2] = walk->rect.w;
1602             values[3] = bar_height;
1603             values[4] = XCB_STACK_MODE_ABOVE;
1604
1605             DLOG("Destroying buffer for output %s\n", walk->name);
1606             xcb_free_pixmap(xcb_connection, walk->buffer);
1607
1608             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1609             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1610                                                                         walk->bar,
1611                                                                         mask,
1612                                                                         values);
1613
1614             mask = XCB_CW_OVERRIDE_REDIRECT;
1615             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1616             DLOG("Changing Window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1617             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1618                                                                         walk->bar,
1619                                                                         mask,
1620                                                                         values);
1621
1622             DLOG("Recreating buffer for output %s\n", walk->name);
1623             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1624                                                                     root_screen->root_depth,
1625                                                                     walk->buffer,
1626                                                                     walk->bar,
1627                                                                     walk->rect.w,
1628                                                                     bar_height);
1629
1630             xcb_void_cookie_t map_cookie, umap_cookie;
1631             if (redraw_bars) {
1632                 /* Unmap the window, and draw it again when in dock mode */
1633                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar);
1634                 if (config.hide_on_modifier == M_DOCK) {
1635                     cont_child();
1636                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1637                 } else {
1638                     stop_child();
1639                 }
1640
1641                 if (config.hide_on_modifier == M_HIDE) {
1642                     /* Switching to hide mode, register for keyevents */
1643                     register_xkb_keyevents();
1644                 } else {
1645                     /* Switching to dock/invisible mode, deregister from keyevents */
1646                     deregister_xkb_keyevents();
1647                 }
1648             }
1649
1650             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1651                 xcb_request_failed(chg_cookie, "Could not change window") ||
1652                 xcb_request_failed(pm_cookie,  "Could not create pixmap") ||
1653                 (redraw_bars && (xcb_request_failed(umap_cookie,  "Could not unmap window") ||
1654                 (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1655                 exit(EXIT_FAILURE);
1656             }
1657         }
1658     }
1659 }
1660
1661 /*
1662  * Render the bars, with buttons and statusline
1663  *
1664  */
1665 void draw_bars(bool unhide) {
1666     DLOG("Drawing Bars...\n");
1667     int i = 0;
1668
1669     refresh_statusline();
1670
1671     i3_output *outputs_walk;
1672     SLIST_FOREACH(outputs_walk, outputs, slist) {
1673         if (!outputs_walk->active) {
1674             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1675             continue;
1676         }
1677         if (outputs_walk->bar == XCB_NONE) {
1678             /* Oh shit, an active output without an own bar. Create it now! */
1679             reconfig_windows(false);
1680         }
1681         /* First things first: clear the backbuffer */
1682         uint32_t color = colors.bar_bg;
1683         xcb_change_gc(xcb_connection,
1684                       outputs_walk->bargc,
1685                       XCB_GC_FOREGROUND,
1686                       &color);
1687         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, bar_height };
1688         xcb_poly_fill_rectangle(xcb_connection,
1689                                 outputs_walk->buffer,
1690                                 outputs_walk->bargc,
1691                                 1,
1692                                 &rect);
1693
1694         if (!TAILQ_EMPTY(&statusline_head)) {
1695             DLOG("Printing statusline!\n");
1696
1697             /* Luckily we already prepared a seperate pixmap containing the rendered
1698              * statusline, we just have to copy the relevant parts to the relevant
1699              * position */
1700             trayclient *trayclient;
1701             int traypx = 0;
1702             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1703                 if (!trayclient->mapped)
1704                     continue;
1705                 /* We assume the tray icons are quadratic (we use the font
1706                  * *height* as *width* of the icons) because we configured them
1707                  * like this. */
1708                 traypx += font.height + 2;
1709             }
1710             /* Add 2px of padding if there are any tray icons */
1711             if (traypx > 0)
1712                 traypx += 2;
1713             xcb_copy_area(xcb_connection,
1714                           statusline_pm,
1715                           outputs_walk->buffer,
1716                           outputs_walk->bargc,
1717                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1718                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1719                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height + 2);
1720         }
1721
1722         if (!config.disable_ws) {
1723             i3_ws *ws_walk;
1724             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1725                 DLOG("Drawing Button for WS %s at x = %d, len = %d\n",
1726                      i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1727                 uint32_t fg_color = colors.inactive_ws_fg;
1728                 uint32_t bg_color = colors.inactive_ws_bg;
1729                 uint32_t border_color = colors.inactive_ws_border;
1730                 if (ws_walk->visible) {
1731                     if (!ws_walk->focused) {
1732                         fg_color = colors.active_ws_fg;
1733                         bg_color = colors.active_ws_bg;
1734                         border_color = colors.active_ws_border;
1735                     } else {
1736                         fg_color = colors.focus_ws_fg;
1737                         bg_color = colors.focus_ws_bg;
1738                         border_color = colors.focus_ws_border;
1739                     }
1740                 }
1741                 if (ws_walk->urgent) {
1742                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1743                     fg_color = colors.urgent_ws_fg;
1744                     bg_color = colors.urgent_ws_bg;
1745                     border_color = colors.urgent_ws_border;
1746                     unhide = true;
1747                 }
1748                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1749                 uint32_t vals_border[] = { border_color, border_color };
1750                 xcb_change_gc(xcb_connection,
1751                               outputs_walk->bargc,
1752                               mask,
1753                               vals_border);
1754                 xcb_rectangle_t rect_border = { i, 1, ws_walk->name_width + 10, font.height + 4 };
1755                 xcb_poly_fill_rectangle(xcb_connection,
1756                                         outputs_walk->buffer,
1757                                         outputs_walk->bargc,
1758                                         1,
1759                                         &rect_border);
1760                 uint32_t vals[] = { bg_color, bg_color };
1761                 xcb_change_gc(xcb_connection,
1762                               outputs_walk->bargc,
1763                               mask,
1764                               vals);
1765                 xcb_rectangle_t rect = { i + 1, 2, ws_walk->name_width + 8, font.height + 2 };
1766                 xcb_poly_fill_rectangle(xcb_connection,
1767                                         outputs_walk->buffer,
1768                                         outputs_walk->bargc,
1769                                         1,
1770                                         &rect);
1771                 set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1772                 draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc,
1773                           i + 5, 3, ws_walk->name_width);
1774                 i += 10 + ws_walk->name_width + 1;
1775
1776             }
1777         }
1778
1779         if (binding.name && !config.disable_binding_mode_indicator) {
1780             uint32_t fg_color = colors.urgent_ws_fg;
1781             uint32_t bg_color = colors.urgent_ws_bg;
1782             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1783
1784             uint32_t vals_border[] = { colors.urgent_ws_border, colors.urgent_ws_border };
1785             xcb_change_gc(xcb_connection,
1786                           outputs_walk->bargc,
1787                           mask,
1788                           vals_border);
1789             xcb_rectangle_t rect_border = { i, 1, binding.width + 10, font.height + 4 };
1790             xcb_poly_fill_rectangle(xcb_connection,
1791                                     outputs_walk->buffer,
1792                                     outputs_walk->bargc,
1793                                     1,
1794                                     &rect_border);
1795
1796             uint32_t vals[] = { bg_color, bg_color };
1797             xcb_change_gc(xcb_connection,
1798                           outputs_walk->bargc,
1799                           mask,
1800                           vals);
1801             xcb_rectangle_t rect = { i + 1, 2, binding.width + 8, font.height + 2 };
1802             xcb_poly_fill_rectangle(xcb_connection,
1803                                     outputs_walk->buffer,
1804                                     outputs_walk->bargc,
1805                                     1,
1806                                     &rect);
1807
1808             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1809             draw_text(binding.name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 3, binding.width);
1810
1811             unhide = true;
1812         }
1813
1814         i = 0;
1815     }
1816
1817     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1818     if (mod_pressed ||
1819             config.hidden_state == S_SHOW ||
1820             unhide) {
1821         unhide_bars();
1822     } else if (config.hide_on_modifier == M_HIDE) {
1823         hide_bars();
1824     }
1825
1826     redraw_bars();
1827 }
1828
1829 /*
1830  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1831  *
1832  */
1833 void redraw_bars(void) {
1834     i3_output *outputs_walk;
1835     SLIST_FOREACH(outputs_walk, outputs, slist) {
1836         if (!outputs_walk->active) {
1837             continue;
1838         }
1839         xcb_copy_area(xcb_connection,
1840                       outputs_walk->buffer,
1841                       outputs_walk->bar,
1842                       outputs_walk->bargc,
1843                       0, 0,
1844                       0, 0,
1845                       outputs_walk->rect.w,
1846                       outputs_walk->rect.h);
1847         xcb_flush(xcb_connection);
1848     }
1849 }
1850
1851 /*
1852  * Set the current binding mode
1853  *
1854  */
1855 void set_current_mode(struct mode *current) {
1856     I3STRING_FREE(binding.name);
1857     binding = *current;
1858     activated_mode = binding.name != NULL;
1859     return;
1860 }