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

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2011 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_atom.h>
  13 #include <xcb/xcb_aux.h>
  14
  15 #ifdef XCB_COMPAT
  16 #include "xcb_compat.h"
  17 #endif
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <i3/ipc.h>
  25 #include <ev.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <err.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/XKBlib.h>
  32 #include <X11/extensions/XKB.h>
  33
  34 #include "common.h"
  35 #include "libi3.h"
  36
  37 /* We save the Atoms in an easy to access array, indexed by an enum */
  38 enum {
  39     #define ATOM_DO(name) name,
  40     #include "xcb_atoms.def"
  41     NUM_ATOMS
  42 };
  43
  44 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  45 xcb_atom_t               atoms[NUM_ATOMS];
  46
  47 /* Variables, that are the same for all functions at all times */
  48 xcb_connection_t *xcb_connection;
  49 int              screen;
  50 xcb_screen_t     *xcb_screen;
  51 xcb_window_t     xcb_root;
  52
  53 /* This is needed for integration with libi3 */
  54 xcb_connection_t *conn;
  55
  56 /* The font we'll use */
  57 static i3Font font;
  58
  59 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  60 Display          *xkb_dpy;
  61 int              xkb_event_base;
  62 int              mod_pressed = 0;
  63
  64 /* Because the statusline is the same on all outputs, we have
  65  * global buffer to render it on */
  66 xcb_gcontext_t   statusline_ctx;
  67 xcb_gcontext_t   statusline_clear;
  68 xcb_pixmap_t     statusline_pm;
  69 uint32_t         statusline_width;
  70
  71 /* Event-Watchers, to interact with the user */
  72 ev_prepare *xcb_prep;
  73 ev_check   *xcb_chk;
  74 ev_io      *xcb_io;
  75 ev_io      *xkb_io;
  76
  77 /* The parsed colors */
  78 struct xcb_colors_t {
  79     uint32_t bar_fg;
  80     uint32_t bar_bg;
  81     uint32_t active_ws_fg;
  82     uint32_t active_ws_bg;
  83     uint32_t active_ws_border;
  84     uint32_t inactive_ws_fg;
  85     uint32_t inactive_ws_bg;
  86     uint32_t inactive_ws_border;
  87     uint32_t urgent_ws_bg;
  88     uint32_t urgent_ws_fg;
  89     uint32_t urgent_ws_border;
  90     uint32_t focus_ws_bg;
  91     uint32_t focus_ws_fg;
  92     uint32_t focus_ws_border;
  93 };
  94 struct xcb_colors_t colors;
  95
  96 /* We define xcb_request_failed as a macro to include the relevant line-number */
  97 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
  98 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
  99     xcb_generic_error_t *err;
 100     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 101         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 102         return err->error_code;
 103     }
 104     return 0;
 105 }
 106
 107 /*
 108  * Redraws the statusline to the buffer
 109  *
 110  */
 111 void refresh_statusline() {
 112     struct status_block *block;
 113
 114     uint32_t old_statusline_width = statusline_width;
 115     statusline_width = 0;
 116
 117     /* Convert all blocks from UTF-8 to UCS-2 and predict the text width (in
 118      * pixels). */
 119     TAILQ_FOREACH(block, &statusline_head, blocks) {
 120         block->ucs2_full_text = (xcb_char2b_t*)convert_utf8_to_ucs2(block->full_text, &(block->glyph_count_full_text));
 121         block->width = predict_text_width((char*)block->ucs2_full_text, block->glyph_count_full_text, true);
 122         /* If this is not the last block, add some pixels for a separator. */
 123         if (TAILQ_NEXT(block, blocks) != NULL)
 124             block->width += 9;
 125         statusline_width += block->width;
 126     }
 127
 128     /* If the statusline is bigger than our screen we need to make sure that
 129      * the pixmap provides enough space, so re-allocate if the width grew */
 130     if (statusline_width > xcb_screen->width_in_pixels &&
 131         statusline_width > old_statusline_width)
 132         realloc_sl_buffer();
 133
 134     /* Clear the statusline pixmap. */
 135     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font.height };
 136     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 137
 138     /* Draw the text of each block. */
 139     uint32_t x = 0;
 140     TAILQ_FOREACH(block, &statusline_head, blocks) {
 141         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 142         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 143         draw_text((char*)block->ucs2_full_text, block->glyph_count_full_text,
 144                   true, statusline_pm, statusline_ctx, x, 0, block->width);
 145         x += block->width;
 146
 147         if (TAILQ_NEXT(block, blocks) != NULL) {
 148             /* This is not the last block, draw a separator. */
 149             set_font_colors(statusline_ctx, get_colorpixel("#666666"), colors.bar_bg);
 150             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 151                           statusline_ctx, 2,
 152                           (xcb_point_t[]){ { x - 5, 2 }, { x - 5, font.height - 2 } });
 153         }
 154
 155         FREE(block->ucs2_full_text);
 156     }
 157 }
 158
 159 /*
 160  * Hides all bars (unmaps them)
 161  *
 162  */
 163 void hide_bars() {
 164     if (!config.hide_on_modifier) {
 165         return;
 166     }
 167
 168     i3_output *walk;
 169     SLIST_FOREACH(walk, outputs, slist) {
 170         if (!walk->active) {
 171             continue;
 172         }
 173         xcb_unmap_window(xcb_connection, walk->bar);
 174     }
 175     stop_child();
 176 }
 177
 178 /*
 179  * Unhides all bars (maps them)
 180  *
 181  */
 182 void unhide_bars() {
 183     if (!config.hide_on_modifier) {
 184         return;
 185     }
 186
 187     i3_output           *walk;
 188     xcb_void_cookie_t   cookie;
 189     uint32_t            mask;
 190     uint32_t            values[5];
 191
 192     cont_child();
 193
 194     SLIST_FOREACH(walk, outputs, slist) {
 195         if (walk->bar == XCB_NONE) {
 196             continue;
 197         }
 198         mask = XCB_CONFIG_WINDOW_X |
 199                XCB_CONFIG_WINDOW_Y |
 200                XCB_CONFIG_WINDOW_WIDTH |
 201                XCB_CONFIG_WINDOW_HEIGHT |
 202                XCB_CONFIG_WINDOW_STACK_MODE;
 203         values[0] = walk->rect.x;
 204         if (config.position == POS_TOP)
 205             values[1] = walk->rect.y;
 206         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 207         values[2] = walk->rect.w;
 208         values[3] = font.height + 6;
 209         values[4] = XCB_STACK_MODE_ABOVE;
 210         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 211         cookie = xcb_configure_window_checked(xcb_connection,
 212                                               walk->bar,
 213                                               mask,
 214                                               values);
 215
 216         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 217             exit(EXIT_FAILURE);
 218         }
 219         xcb_map_window(xcb_connection, walk->bar);
 220     }
 221 }
 222
 223 /*
 224  * Parse the colors into a format that we can use
 225  *
 226  */
 227 void init_colors(const struct xcb_color_strings_t *new_colors) {
 228 #define PARSE_COLOR(name, def) \
 229     do { \
 230         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 231     } while  (0)
 232     PARSE_COLOR(bar_fg, "#FFFFFF");
 233     PARSE_COLOR(bar_bg, "#000000");
 234     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 235     PARSE_COLOR(active_ws_bg, "#333333");
 236     PARSE_COLOR(active_ws_border, "#333333");
 237     PARSE_COLOR(inactive_ws_fg, "#888888");
 238     PARSE_COLOR(inactive_ws_bg, "#222222");
 239     PARSE_COLOR(inactive_ws_border, "#333333");
 240     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 241     PARSE_COLOR(urgent_ws_bg, "#900000");
 242     PARSE_COLOR(urgent_ws_border, "#2f343a");
 243     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 244     PARSE_COLOR(focus_ws_bg, "#285577");
 245     PARSE_COLOR(focus_ws_border, "#4c7899");
 246 #undef PARSE_COLOR
 247 }
 248
 249 /*
 250  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 251  * We determine, whether the click occured on a ws-button or if the scroll-
 252  * wheel was used and change the workspace appropriately
 253  *
 254  */
 255 void handle_button(xcb_button_press_event_t *event) {
 256     i3_ws *cur_ws;
 257
 258     /* Determine, which bar was clicked */
 259     i3_output *walk;
 260     xcb_window_t bar = event->event;
 261     SLIST_FOREACH(walk, outputs, slist) {
 262         if (walk->bar == bar) {
 263             break;
 264         }
 265     }
 266
 267     if (walk == NULL) {
 268         DLOG("Unknown Bar klicked!\n");
 269         return;
 270     }
 271
 272     /* TODO: Move this to extern get_ws_for_output() */
 273     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 274         if (cur_ws->visible) {
 275             break;
 276         }
 277     }
 278
 279     if (cur_ws == NULL) {
 280         DLOG("No Workspace active?\n");
 281         return;
 282     }
 283
 284     int32_t x = event->event_x;
 285
 286     DLOG("Got Button %d\n", event->detail);
 287
 288     switch (event->detail) {
 289         case 1:
 290             /* Left Mousbutton. We determine, which button was clicked
 291              * and set cur_ws accordingly */
 292             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 293                 DLOG("x = %d\n", x);
 294                 if (x >= 0 && x < cur_ws->name_width + 10) {
 295                     break;
 296                 }
 297                 x -= cur_ws->name_width + 11;
 298             }
 299             if (cur_ws == NULL) {
 300                 return;
 301             }
 302             break;
 303         case 4:
 304             /* Mouse wheel down. We select the next ws */
 305             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 306                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 307             } else {
 308                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 309             }
 310             break;
 311         case 5:
 312             /* Mouse wheel up. We select the previos ws */
 313             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 314                 cur_ws = TAILQ_FIRST(walk->workspaces);
 315             } else {
 316                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 317             }
 318             break;
 319     }
 320
 321     /* To properly handle workspace names with double quotes in them, we need
 322      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 323      * first count the number of double quotes, then we allocate a large enough
 324      * buffer, then we copy character by character. */
 325     int num_quotes = 0;
 326     size_t namelen = 0;
 327     for (char *walk = cur_ws->name; *walk != '\0'; walk++) {
 328         if (*walk == '"')
 329             num_quotes++;
 330         /* While we’re looping through the name anyway, we can save one
 331          * strlen(). */
 332         namelen++;
 333     }
 334
 335     const size_t len = namelen + strlen("workspace \"\"") + 1;
 336     char *buffer = scalloc(len+num_quotes);
 337     strncpy(buffer, "workspace \"", strlen("workspace \""));
 338     int inpos, outpos;
 339     for (inpos = 0, outpos = strlen("workspace \"");
 340          inpos < namelen;
 341          inpos++, outpos++) {
 342         if (cur_ws->name[inpos] == '"') {
 343             buffer[outpos] = '\\';
 344             outpos++;
 345         }
 346         buffer[outpos] = cur_ws->name[inpos];
 347     }
 348     buffer[outpos] = '"';
 349     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 350     free(buffer);
 351 }
 352
 353 /*
 354  * Configures the x coordinate of all trayclients. To be called after adding a
 355  * new tray client or removing an old one.
 356  *
 357  */
 358 static void configure_trayclients() {
 359     trayclient *trayclient;
 360     i3_output *output;
 361     SLIST_FOREACH(output, outputs, slist) {
 362         if (!output->active)
 363             continue;
 364
 365         int clients = 0;
 366         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 367             if (!trayclient->mapped)
 368                 continue;
 369             clients++;
 370
 371             DLOG("Configuring tray window %08x to x=%d\n",
 372                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 373             uint32_t x = output->rect.w - (clients * (font.height + 2));
 374             xcb_configure_window(xcb_connection,
 375                                  trayclient->win,
 376                                  XCB_CONFIG_WINDOW_X,
 377                                  &x);
 378         }
 379     }
 380 }
 381
 382 /*
 383  * Handles ClientMessages (messages sent from another client directly to us).
 384  *
 385  * At the moment, only the tray window will receive client messages. All
 386  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 387  *
 388  */
 389 static void handle_client_message(xcb_client_message_event_t* event) {
 390     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 391         event->format == 32) {
 392         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 393         /* event->data.data32[0] is the timestamp */
 394         uint32_t op = event->data.data32[1];
 395         uint32_t mask;
 396         uint32_t values[2];
 397         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 398             xcb_window_t client = event->data.data32[2];
 399
 400             /* Listen for PropertyNotify events to get the most recent value of
 401              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 402             mask = XCB_CW_EVENT_MASK;
 403             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 404                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 405             xcb_change_window_attributes(xcb_connection,
 406                                          client,
 407                                          mask,
 408                                          values);
 409
 410             /* Request the _XEMBED_INFO property. The XEMBED specification
 411              * (which is referred by the tray specification) says this *has* to
 412              * be set, but VLC does not set it… */
 413             bool map_it = true;
 414             int xe_version = 1;
 415             xcb_get_property_cookie_t xembedc;
 416             xcb_generic_error_t *error;
 417             xembedc = xcb_get_property(xcb_connection,
 418                                        0,
 419                                        client,
 420                                        atoms[_XEMBED_INFO],
 421                                        XCB_GET_PROPERTY_TYPE_ANY,
 422                                        0,
 423                                        2 * 32);
 424
 425             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 426                                                                        xembedc,
 427                                                                        &error);
 428             if (error != NULL) {
 429                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 430                      error->error_code);
 431                 free(error);
 432                 return;
 433             }
 434             if (xembedr != NULL && xembedr->length != 0) {
 435                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 436                 uint32_t *xembed = xcb_get_property_value(xembedr);
 437                 DLOG("xembed version = %d\n", xembed[0]);
 438                 DLOG("xembed flags = %d\n", xembed[1]);
 439                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 440                 xe_version = xembed[0];
 441                 if (xe_version > 1)
 442                     xe_version = 1;
 443                 free(xembedr);
 444             } else {
 445                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 446             }
 447
 448             DLOG("X window %08x requested docking\n", client);
 449             i3_output *walk, *output = NULL;
 450             SLIST_FOREACH(walk, outputs, slist) {
 451                 if (!walk->active)
 452                     continue;
 453                 if (config.tray_output) {
 454                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 455                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 456                         continue;
 457                 }
 458
 459                 DLOG("using output %s\n", walk->name);
 460                 output = walk;
 461                 break;
 462             }
 463             /* In case of tray_output == primary and there is no primary output
 464              * configured, we fall back to the first available output. */
 465             if (output == NULL && strcasecmp("primary", config.tray_output) == 0) {
 466                 SLIST_FOREACH(walk, outputs, slist) {
 467                     if (!walk->active)
 468                         continue;
 469                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 470                     output = walk;
 471                     break;
 472                 }
 473             }
 474             if (output == NULL) {
 475                 ELOG("No output found\n");
 476                 return;
 477             }
 478             xcb_reparent_window(xcb_connection,
 479                                 client,
 480                                 output->bar,
 481                                 output->rect.w - font.height - 2,
 482                                 2);
 483             /* We reconfigure the window to use a reasonable size. The systray
 484              * specification explicitly says:
 485              *   Tray icons may be assigned any size by the system tray, and
 486              *   should do their best to cope with any size effectively
 487              */
 488             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 489             values[0] = font.height;
 490             values[1] = font.height;
 491             xcb_configure_window(xcb_connection,
 492                                  client,
 493                                  mask,
 494                                  values);
 495
 496             /* send the XEMBED_EMBEDDED_NOTIFY message */
 497             void *event = scalloc(32);
 498             xcb_client_message_event_t *ev = event;
 499             ev->response_type = XCB_CLIENT_MESSAGE;
 500             ev->window = client;
 501             ev->type = atoms[_XEMBED];
 502             ev->format = 32;
 503             ev->data.data32[0] = XCB_CURRENT_TIME;
 504             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 505             ev->data.data32[2] = output->bar;
 506             ev->data.data32[3] = xe_version;
 507             xcb_send_event(xcb_connection,
 508                            0,
 509                            client,
 510                            XCB_EVENT_MASK_NO_EVENT,
 511                            (char*)ev);
 512             free(event);
 513
 514             /* Put the client inside the save set. Upon termination (whether
 515              * killed or normal exit does not matter) of i3bar, these clients
 516              * will be correctly reparented to their most closest living
 517              * ancestor. Without this, tray icons might die when i3bar
 518              * exits/crashes. */
 519             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 520
 521             if (map_it) {
 522                 DLOG("Mapping dock client\n");
 523                 xcb_map_window(xcb_connection, client);
 524             } else {
 525                 DLOG("Not mapping dock client yet\n");
 526             }
 527             trayclient *tc = smalloc(sizeof(trayclient));
 528             tc->win = client;
 529             tc->mapped = map_it;
 530             tc->xe_version = xe_version;
 531             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 532
 533             /* Trigger an update to copy the statusline text to the appropriate
 534              * position */
 535             configure_trayclients();
 536             draw_bars();
 537         }
 538     }
 539 }
 540
 541 /*
 542  * Handles UnmapNotify events. These events happen when a tray window unmaps
 543  * itself. We then update our data structure
 544  *
 545  */
 546 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 547     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 548
 549     i3_output *walk;
 550     SLIST_FOREACH(walk, outputs, slist) {
 551         if (!walk->active)
 552             continue;
 553         DLOG("checking output %s\n", walk->name);
 554         trayclient *trayclient;
 555         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 556             if (trayclient->win != event->window)
 557                 continue;
 558
 559             DLOG("Removing tray client with window ID %08x\n", event->window);
 560             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 561
 562             /* Trigger an update, we now have more space for the statusline */
 563             configure_trayclients();
 564             draw_bars();
 565             return;
 566         }
 567     }
 568 }
 569
 570 /*
 571  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 572  * handled, which tells us whether a dock client should be mapped or unmapped.
 573  *
 574  */
 575 static void handle_property_notify(xcb_property_notify_event_t *event) {
 576     DLOG("PropertyNotify\n");
 577     if (event->atom == atoms[_XEMBED_INFO] &&
 578         event->state == XCB_PROPERTY_NEW_VALUE) {
 579         DLOG("xembed_info updated\n");
 580         trayclient *trayclient = NULL, *walk;
 581         i3_output *o_walk;
 582         SLIST_FOREACH(o_walk, outputs, slist) {
 583             if (!o_walk->active)
 584                 continue;
 585
 586             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 587                 if (walk->win != event->window)
 588                     continue;
 589                 trayclient = walk;
 590                 break;
 591             }
 592
 593             if (trayclient)
 594                 break;
 595         }
 596         if (!trayclient) {
 597             ELOG("PropertyNotify received for unknown window %08x\n",
 598                  event->window);
 599             return;
 600         }
 601         xcb_get_property_cookie_t xembedc;
 602         xembedc = xcb_get_property_unchecked(xcb_connection,
 603                                              0,
 604                                              trayclient->win,
 605                                              atoms[_XEMBED_INFO],
 606                                              XCB_GET_PROPERTY_TYPE_ANY,
 607                                              0,
 608                                              2 * 32);
 609
 610         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 611                                                                    xembedc,
 612                                                                    NULL);
 613         if (xembedr == NULL || xembedr->length == 0) {
 614             DLOG("xembed_info unset\n");
 615             return;
 616         }
 617
 618         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 619         uint32_t *xembed = xcb_get_property_value(xembedr);
 620         DLOG("xembed version = %d\n", xembed[0]);
 621         DLOG("xembed flags = %d\n", xembed[1]);
 622         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 623         DLOG("map-state now %d\n", map_it);
 624         if (trayclient->mapped && !map_it) {
 625             /* need to unmap the window */
 626             xcb_unmap_window(xcb_connection, trayclient->win);
 627             trayclient->mapped = map_it;
 628             configure_trayclients();
 629             draw_bars();
 630         } else if (!trayclient->mapped && map_it) {
 631             /* need to map the window */
 632             xcb_map_window(xcb_connection, trayclient->win);
 633             trayclient->mapped = map_it;
 634             configure_trayclients();
 635             draw_bars();
 636         }
 637         free(xembedr);
 638     }
 639 }
 640
 641 /*
 642  * Handle ConfigureRequests by denying them and sending the client a
 643  * ConfigureNotify with its actual size.
 644  *
 645  */
 646 static void handle_configure_request(xcb_configure_request_event_t *event) {
 647     DLOG("ConfigureRequest for window = %08x\n", event->window);
 648
 649     trayclient *trayclient;
 650     i3_output *output;
 651     SLIST_FOREACH(output, outputs, slist) {
 652         if (!output->active)
 653             continue;
 654
 655         int clients = 0;
 656         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 657             if (!trayclient->mapped)
 658                 continue;
 659             clients++;
 660
 661             if (trayclient->win != event->window)
 662                 continue;
 663
 664             xcb_rectangle_t rect;
 665             rect.x = output->rect.w - (clients * (font.height + 2));
 666             rect.y = 2;
 667             rect.width = font.height;
 668             rect.height = font.height;
 669
 670             DLOG("This is a tray window. x = %d\n", rect.x);
 671             fake_configure_notify(xcb_connection, rect, event->window, 0);
 672             return;
 673         }
 674     }
 675
 676     DLOG("WARNING: Could not find corresponding tray window.\n");
 677 }
 678
 679 /*
 680  * This function is called immediately before the main loop locks. We flush xcb
 681  * then (and only then)
 682  *
 683  */
 684 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 685     xcb_flush(xcb_connection);
 686 }
 687
 688 /*
 689  * This function is called immediately after the main loop locks, so when one
 690  * of the watchers registered an event.
 691  * We check whether an X-Event arrived and handle it.
 692  *
 693  */
 694 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 695     xcb_generic_event_t *event;
 696
 697     if (xcb_connection_has_error(xcb_connection)) {
 698         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 699         exit(1);
 700     }
 701
 702     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 703         switch (event->response_type & ~0x80) {
 704             case XCB_EXPOSE:
 705                 /* Expose-events happen, when the window needs to be redrawn */
 706                 redraw_bars();
 707                 break;
 708             case XCB_BUTTON_PRESS:
 709                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 710                 handle_button((xcb_button_press_event_t*) event);
 711                 break;
 712             case XCB_CLIENT_MESSAGE:
 713                 /* Client messages are used for client-to-client communication, for
 714                  * example system tray widgets talk to us directly via client messages. */
 715                 handle_client_message((xcb_client_message_event_t*) event);
 716                 break;
 717             case XCB_UNMAP_NOTIFY:
 718             case XCB_DESTROY_NOTIFY:
 719                 /* UnmapNotifies are received when a tray window unmaps itself */
 720                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 721                 break;
 722             case XCB_PROPERTY_NOTIFY:
 723                 /* PropertyNotify */
 724                 handle_property_notify((xcb_property_notify_event_t*) event);
 725                 break;
 726             case XCB_CONFIGURE_REQUEST:
 727                 /* ConfigureRequest, sent by a tray child */
 728                 handle_configure_request((xcb_configure_request_event_t*) event);
 729                 break;
 730         }
 731         free(event);
 732     }
 733 }
 734
 735 /*
 736  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 737  * are triggered
 738  *
 739  */
 740 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 741 }
 742
 743 /*
 744  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 745  *
 746  */
 747 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 748     XkbEvent ev;
 749     int modstate = 0;
 750
 751     DLOG("Got XKB-Event!\n");
 752
 753     while (XPending(xkb_dpy)) {
 754         XNextEvent(xkb_dpy, (XEvent*)&ev);
 755
 756         if (ev.type != xkb_event_base) {
 757             ELOG("No Xkb-Event!\n");
 758             continue;
 759         }
 760
 761         if (ev.any.xkb_type != XkbStateNotify) {
 762             ELOG("No State Notify!\n");
 763             continue;
 764         }
 765
 766         unsigned int mods = ev.state.mods;
 767         modstate = mods & config.modifier;
 768     }
 769
 770 #define DLOGMOD(modmask, status, barfunc) \
 771     do { \
 772         switch (modmask) { \
 773             case ShiftMask: \
 774                 DLOG("ShiftMask got " #status "!\n"); \
 775                 break; \
 776             case ControlMask: \
 777                 DLOG("ControlMask got " #status "!\n"); \
 778                 break; \
 779             case Mod1Mask: \
 780                 DLOG("Mod1Mask got " #status "!\n"); \
 781                 break; \
 782             case Mod2Mask: \
 783                 DLOG("Mod2Mask got " #status "!\n"); \
 784                 break; \
 785             case Mod3Mask: \
 786                 DLOG("Mod3Mask got " #status "!\n"); \
 787                 break; \
 788             case Mod4Mask: \
 789                 DLOG("Mod4Mask got " #status "!\n"); \
 790                 break; \
 791             case Mod5Mask: \
 792                 DLOG("Mod5Mask got " #status "!\n"); \
 793                 break; \
 794         } \
 795         barfunc(); \
 796     } while (0)
 797
 798     if (modstate != mod_pressed) {
 799         if (modstate == 0) {
 800             DLOGMOD(config.modifier, released, hide_bars);
 801         } else {
 802             DLOGMOD(config.modifier, pressed, unhide_bars);
 803         }
 804         mod_pressed = modstate;
 805     }
 806
 807 #undef DLOGMOD
 808 }
 809
 810 /*
 811  * Early initialization of the connection to X11: Everything which does not
 812  * depend on 'config'.
 813  *
 814  */
 815 char *init_xcb_early() {
 816     /* FIXME: xcb_connect leaks Memory */
 817     xcb_connection = xcb_connect(NULL, &screen);
 818     if (xcb_connection_has_error(xcb_connection)) {
 819         ELOG("Cannot open display\n");
 820         exit(EXIT_FAILURE);
 821     }
 822     conn = xcb_connection;
 823     DLOG("Connected to xcb\n");
 824
 825     /* We have to request the atoms we need */
 826     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 827     #include "xcb_atoms.def"
 828
 829     xcb_screen = xcb_aux_get_screen(xcb_connection, screen);
 830     xcb_root = xcb_screen->root;
 831
 832     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 833      * this way, we can choose to crop it */
 834     uint32_t mask = XCB_GC_FOREGROUND;
 835     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 836
 837     statusline_clear = xcb_generate_id(xcb_connection);
 838     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 839                                                                statusline_clear,
 840                                                                xcb_root,
 841                                                                mask,
 842                                                                vals);
 843
 844     statusline_ctx = xcb_generate_id(xcb_connection);
 845     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 846                                                             statusline_ctx,
 847                                                             xcb_root,
 848                                                             0,
 849                                                             NULL);
 850
 851     statusline_pm = xcb_generate_id(xcb_connection);
 852     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 853                                                                xcb_screen->root_depth,
 854                                                                statusline_pm,
 855                                                                xcb_root,
 856                                                                xcb_screen->width_in_pixels,
 857                                                                xcb_screen->height_in_pixels);
 858
 859
 860     /* The various Watchers to communicate with xcb */
 861     xcb_io = smalloc(sizeof(ev_io));
 862     xcb_prep = smalloc(sizeof(ev_prepare));
 863     xcb_chk = smalloc(sizeof(ev_check));
 864
 865     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 866     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 867     ev_check_init(xcb_chk, &xcb_chk_cb);
 868
 869     ev_io_start(main_loop, xcb_io);
 870     ev_prepare_start(main_loop, xcb_prep);
 871     ev_check_start(main_loop, xcb_chk);
 872
 873     /* Now we get the atoms and save them in a nice data structure */
 874     get_atoms();
 875
 876     xcb_get_property_cookie_t path_cookie;
 877     path_cookie = xcb_get_property_unchecked(xcb_connection,
 878                                    0,
 879                                    xcb_root,
 880                                    atoms[I3_SOCKET_PATH],
 881                                    XCB_GET_PROPERTY_TYPE_ANY,
 882                                    0, PATH_MAX);
 883
 884     /* We check, if i3 set its socket-path */
 885     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 886                                                                   path_cookie,
 887                                                                   NULL);
 888     char *path = NULL;
 889     if (path_reply) {
 890         int len = xcb_get_property_value_length(path_reply);
 891         if (len != 0) {
 892             path = strndup(xcb_get_property_value(path_reply), len);
 893         }
 894     }
 895
 896
 897     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 898         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 899         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 900         exit(EXIT_FAILURE);
 901     }
 902
 903     return path;
 904 }
 905
 906 /*
 907  * Initialization which depends on 'config' being usable. Called after the
 908  * configuration has arrived.
 909  *
 910  */
 911 void init_xcb_late(char *fontname) {
 912     if (fontname == NULL)
 913         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 914
 915     /* Load the font */
 916     font = load_font(fontname, true);
 917     set_font(&font);
 918     DLOG("Calculated Font-height: %d\n", font.height);
 919
 920     xcb_flush(xcb_connection);
 921
 922     /* To grab modifiers without blocking other applications from receiving key-events
 923      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 924      * in xcb */
 925     if (config.hide_on_modifier) {
 926         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 927         xkb_major = XkbMajorVersion;
 928         xkb_minor = XkbMinorVersion;
 929
 930         xkb_dpy = XkbOpenDisplay(NULL,
 931                                  &xkb_event_base,
 932                                  &xkb_errbase,
 933                                  &xkb_major,
 934                                  &xkb_minor,
 935                                  &xkb_err);
 936
 937         if (xkb_dpy == NULL) {
 938             ELOG("No XKB!\n");
 939             exit(EXIT_FAILURE);
 940         }
 941
 942         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 943             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 944             exit(EXIT_FAILURE);
 945         }
 946
 947         int i1;
 948         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 949             ELOG("XKB not supported by X-server!\n");
 950             exit(EXIT_FAILURE);
 951         }
 952
 953         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 954             ELOG("Could not grab Key!\n");
 955             exit(EXIT_FAILURE);
 956         }
 957
 958         xkb_io = smalloc(sizeof(ev_io));
 959         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 960         ev_io_start(main_loop, xkb_io);
 961         XFlush(xkb_dpy);
 962     }
 963 }
 964
 965 /*
 966  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 967  * for the X11 display we are running on, then acquiring the selection for this
 968  * atom. Afterwards, tray clients will send ClientMessages to our window.
 969  *
 970  */
 971 void init_tray() {
 972     DLOG("Initializing system tray functionality\n");
 973     /* request the tray manager atom for the X11 display we are running on */
 974     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 975     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 976     xcb_intern_atom_cookie_t tray_cookie;
 977     xcb_intern_atom_reply_t *tray_reply;
 978     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 979
 980     /* tray support: we need a window to own the selection */
 981     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 982     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 983     uint32_t selval[] = { 1 };
 984     xcb_create_window(xcb_connection,
 985                       xcb_screen->root_depth,
 986                       selwin,
 987                       xcb_root,
 988                       -1, -1,
 989                       1, 1,
 990                       1,
 991                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 992                       xcb_screen->root_visual,
 993                       selmask,
 994                       selval);
 995
 996     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 997     /* set the atoms */
 998     xcb_change_property(xcb_connection,
 999                         XCB_PROP_MODE_REPLACE,
1000                         selwin,
1001                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1002                         XCB_ATOM_CARDINAL,
1003                         32,
1004                         1,
1005                         &orientation);
1006
1007     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1008         ELOG("Could not get atom %s\n", atomname);
1009         exit(EXIT_FAILURE);
1010     }
1011
1012     xcb_set_selection_owner(xcb_connection,
1013                             selwin,
1014                             tray_reply->atom,
1015                             XCB_CURRENT_TIME);
1016
1017     /* Verify that we have the selection */
1018     xcb_get_selection_owner_cookie_t selcookie;
1019     xcb_get_selection_owner_reply_t *selreply;
1020
1021     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1022     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1023         ELOG("Could not get selection owner for %s\n", atomname);
1024         exit(EXIT_FAILURE);
1025     }
1026
1027     if (selreply->owner != selwin) {
1028         ELOG("Could not set the %s selection. " \
1029              "Maybe another tray is already running?\n", atomname);
1030         /* NOTE that this error is not fatal. We just can’t provide tray
1031          * functionality */
1032         free(selreply);
1033         return;
1034     }
1035
1036     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
1037     void *event = scalloc(32);
1038     xcb_client_message_event_t *ev = event;
1039     ev->response_type = XCB_CLIENT_MESSAGE;
1040     ev->window = xcb_root;
1041     ev->type = atoms[MANAGER];
1042     ev->format = 32;
1043     ev->data.data32[0] = XCB_CURRENT_TIME;
1044     ev->data.data32[1] = tray_reply->atom;
1045     ev->data.data32[2] = selwin;
1046     xcb_send_event(xcb_connection,
1047                    0,
1048                    xcb_root,
1049                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
1050                    (char*)ev);
1051     free(event);
1052     free(tray_reply);
1053 }
1054
1055 /*
1056  * Cleanup the xcb-stuff.
1057  * Called once, before the program terminates.
1058  *
1059  */
1060 void clean_xcb() {
1061     i3_output *o_walk;
1062     free_workspaces();
1063     SLIST_FOREACH(o_walk, outputs, slist) {
1064         destroy_window(o_walk);
1065         FREE(o_walk->trayclients);
1066         FREE(o_walk->workspaces);
1067         FREE(o_walk->name);
1068     }
1069     FREE_SLIST(outputs, i3_output);
1070     FREE(outputs);
1071
1072     xcb_flush(xcb_connection);
1073     xcb_disconnect(xcb_connection);
1074
1075     ev_check_stop(main_loop, xcb_chk);
1076     ev_prepare_stop(main_loop, xcb_prep);
1077     ev_io_stop(main_loop, xcb_io);
1078
1079     FREE(xcb_chk);
1080     FREE(xcb_prep);
1081     FREE(xcb_io);
1082 }
1083
1084 /*
1085  * Get the earlier requested atoms and save them in the prepared data structure
1086  *
1087  */
1088 void get_atoms() {
1089     xcb_intern_atom_reply_t *reply;
1090     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1091         if (reply == NULL) { \
1092             ELOG("Could not get atom %s\n", #name); \
1093             exit(EXIT_FAILURE); \
1094         } \
1095         atoms[name] = reply->atom; \
1096         free(reply);
1097
1098     #include "xcb_atoms.def"
1099     DLOG("Got Atoms\n");
1100 }
1101
1102 /*
1103  * Reparents all tray clients of the specified output to the root window. This
1104  * is either used when shutting down, when an output appears (xrandr --output
1105  * VGA1 --off) or when the primary output changes.
1106  *
1107  * Applications using the tray will start the protocol from the beginning again
1108  * afterwards.
1109  *
1110  */
1111 void kick_tray_clients(i3_output *output) {
1112     trayclient *trayclient;
1113     TAILQ_FOREACH(trayclient, output->trayclients, tailq) {
1114         /* Unmap, then reparent (to root) the tray client windows */
1115         xcb_unmap_window(xcb_connection, trayclient->win);
1116         xcb_reparent_window(xcb_connection,
1117                             trayclient->win,
1118                             xcb_root,
1119                             0,
1120                             0);
1121     }
1122 }
1123
1124 /*
1125  * Destroy the bar of the specified output
1126  *
1127  */
1128 void destroy_window(i3_output *output) {
1129     if (output == NULL) {
1130         return;
1131     }
1132     if (output->bar == XCB_NONE) {
1133         return;
1134     }
1135
1136     kick_tray_clients(output);
1137     xcb_destroy_window(xcb_connection, output->bar);
1138     output->bar = XCB_NONE;
1139 }
1140
1141 /*
1142  * Reallocate the statusline-buffer
1143  *
1144  */
1145 void realloc_sl_buffer() {
1146     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1147          statusline_width, xcb_screen->width_in_pixels);
1148     xcb_free_pixmap(xcb_connection, statusline_pm);
1149     statusline_pm = xcb_generate_id(xcb_connection);
1150     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1151                                                                xcb_screen->root_depth,
1152                                                                statusline_pm,
1153                                                                xcb_root,
1154                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1155                                                                xcb_screen->height_in_pixels);
1156
1157     uint32_t mask = XCB_GC_FOREGROUND;
1158     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1159     xcb_free_gc(xcb_connection, statusline_clear);
1160     statusline_clear = xcb_generate_id(xcb_connection);
1161     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1162                                                                statusline_clear,
1163                                                                xcb_root,
1164                                                                mask,
1165                                                                vals);
1166
1167     mask |= XCB_GC_BACKGROUND;
1168     vals[0] = colors.bar_fg;
1169     statusline_ctx = xcb_generate_id(xcb_connection);
1170     xcb_free_gc(xcb_connection, statusline_ctx);
1171     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1172                                                             statusline_ctx,
1173                                                             xcb_root,
1174                                                             mask,
1175                                                             vals);
1176
1177     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1178         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1179         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1180         exit(EXIT_FAILURE);
1181     }
1182
1183 }
1184
1185 /*
1186  * Reconfigure all bars and create new bars for recently activated outputs
1187  *
1188  */
1189 void reconfig_windows() {
1190     uint32_t mask;
1191     uint32_t values[5];
1192     static bool tray_configured = false;
1193
1194     i3_output *walk;
1195     SLIST_FOREACH(walk, outputs, slist) {
1196         if (!walk->active) {
1197             /* If an output is not active, we destroy its bar */
1198             /* FIXME: Maybe we rather want to unmap? */
1199             DLOG("Destroying window for output %s\n", walk->name);
1200             destroy_window(walk);
1201             continue;
1202         }
1203         if (walk->bar == XCB_NONE) {
1204             DLOG("Creating Window for output %s\n", walk->name);
1205
1206             walk->bar = xcb_generate_id(xcb_connection);
1207             walk->buffer = xcb_generate_id(xcb_connection);
1208             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1209             /* Black background */
1210             values[0] = colors.bar_bg;
1211             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1212             values[1] = config.hide_on_modifier;
1213             /* We enable the following EventMask fields:
1214              * EXPOSURE, to get expose events (we have to re-draw then)
1215              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1216              *                        child windows use ConfigureWindow
1217              * BUTTON_PRESS, to handle clicks on the workspace buttons
1218              * */
1219             values[2] = XCB_EVENT_MASK_EXPOSURE |
1220                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1221             if (!config.disable_ws) {
1222                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1223             }
1224             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1225                                                                      xcb_screen->root_depth,
1226                                                                      walk->bar,
1227                                                                      xcb_root,
1228                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1229                                                                      walk->rect.w, font.height + 6,
1230                                                                      1,
1231                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1232                                                                      xcb_screen->root_visual,
1233                                                                      mask,
1234                                                                      values);
1235
1236             /* The double-buffer we use to render stuff off-screen */
1237             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1238                                                                     xcb_screen->root_depth,
1239                                                                     walk->buffer,
1240                                                                     walk->bar,
1241                                                                     walk->rect.w,
1242                                                                     walk->rect.h);
1243
1244             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1245             xcb_void_cookie_t class_cookie;
1246             class_cookie = xcb_change_property(xcb_connection,
1247                                                XCB_PROP_MODE_REPLACE,
1248                                                walk->bar,
1249                                                XCB_ATOM_WM_CLASS,
1250                                                XCB_ATOM_STRING,
1251                                                8,
1252                                                (strlen("i3bar") + 1) * 2,
1253                                                "i3bar\0i3bar\0");
1254
1255             char *name;
1256             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1257                 err(EXIT_FAILURE, "asprintf()");
1258             xcb_void_cookie_t name_cookie;
1259             name_cookie = xcb_change_property(xcb_connection,
1260                                               XCB_PROP_MODE_REPLACE,
1261                                               walk->bar,
1262                                               XCB_ATOM_WM_NAME,
1263                                               XCB_ATOM_STRING,
1264                                               8,
1265                                               strlen(name),
1266                                               name);
1267             free(name);
1268
1269             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1270              * this one */
1271             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1272                                                                 XCB_PROP_MODE_REPLACE,
1273                                                                 walk->bar,
1274                                                                 atoms[_NET_WM_WINDOW_TYPE],
1275                                                                 XCB_ATOM_ATOM,
1276                                                                 32,
1277                                                                 1,
1278                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1279
1280             /* We need to tell i3, where to reserve space for i3bar */
1281             /* left, right, top, bottom, left_start_y, left_end_y,
1282              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1283              * bottom_end_x */
1284             /* A local struct to save the strut_partial property */
1285             struct {
1286                 uint32_t left;
1287                 uint32_t right;
1288                 uint32_t top;
1289                 uint32_t bottom;
1290                 uint32_t left_start_y;
1291                 uint32_t left_end_y;
1292                 uint32_t right_start_y;
1293                 uint32_t right_end_y;
1294                 uint32_t top_start_x;
1295                 uint32_t top_end_x;
1296                 uint32_t bottom_start_x;
1297                 uint32_t bottom_end_x;
1298             } __attribute__((__packed__)) strut_partial = {0,};
1299             switch (config.position) {
1300                 case POS_NONE:
1301                     break;
1302                 case POS_TOP:
1303                     strut_partial.top = font.height + 6;
1304                     strut_partial.top_start_x = walk->rect.x;
1305                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1306                     break;
1307                 case POS_BOT:
1308                     strut_partial.bottom = font.height + 6;
1309                     strut_partial.bottom_start_x = walk->rect.x;
1310                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1311                     break;
1312             }
1313             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1314                                                                  XCB_PROP_MODE_REPLACE,
1315                                                                  walk->bar,
1316                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1317                                                                  XCB_ATOM_CARDINAL,
1318                                                                  32,
1319                                                                  12,
1320                                                                  &strut_partial);
1321
1322             /* We also want a graphics-context for the bars (it defines the properties
1323              * with which we draw to them) */
1324             walk->bargc = xcb_generate_id(xcb_connection);
1325             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1326                                                                 walk->bargc,
1327                                                                 walk->bar,
1328                                                                 0,
1329                                                                 NULL);
1330
1331             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1332             xcb_void_cookie_t map_cookie;
1333             if (!config.hide_on_modifier) {
1334                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1335             }
1336
1337             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1338                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1339                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1340                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1341                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1342                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1343                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1344                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1345                 exit(EXIT_FAILURE);
1346             }
1347
1348             if (!tray_configured &&
1349                 (!config.tray_output ||
1350                  strcasecmp("none", config.tray_output) != 0)) {
1351                 init_tray();
1352                 tray_configured = true;
1353             }
1354         } else {
1355             /* We already have a bar, so we just reconfigure it */
1356             mask = XCB_CONFIG_WINDOW_X |
1357                    XCB_CONFIG_WINDOW_Y |
1358                    XCB_CONFIG_WINDOW_WIDTH |
1359                    XCB_CONFIG_WINDOW_HEIGHT |
1360                    XCB_CONFIG_WINDOW_STACK_MODE;
1361             values[0] = walk->rect.x;
1362             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1363             values[2] = walk->rect.w;
1364             values[3] = font.height + 6;
1365             values[4] = XCB_STACK_MODE_ABOVE;
1366
1367             DLOG("Destroying buffer for output %s", walk->name);
1368             xcb_free_pixmap(xcb_connection, walk->buffer);
1369
1370             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1371             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1372                                                                         walk->bar,
1373                                                                         mask,
1374                                                                         values);
1375
1376             DLOG("Recreating buffer for output %s", walk->name);
1377             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1378                                                                     xcb_screen->root_depth,
1379                                                                     walk->buffer,
1380                                                                     walk->bar,
1381                                                                     walk->rect.w,
1382                                                                     walk->rect.h);
1383
1384             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1385                 exit(EXIT_FAILURE);
1386             }
1387             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1388                 exit(EXIT_FAILURE);
1389             }
1390         }
1391     }
1392 }
1393
1394 /*
1395  * Render the bars, with buttons and statusline
1396  *
1397  */
1398 void draw_bars() {
1399     DLOG("Drawing Bars...\n");
1400     int i = 0;
1401
1402     refresh_statusline();
1403
1404     i3_output *outputs_walk;
1405     SLIST_FOREACH(outputs_walk, outputs, slist) {
1406         if (!outputs_walk->active) {
1407             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1408             continue;
1409         }
1410         if (outputs_walk->bar == XCB_NONE) {
1411             /* Oh shit, an active output without an own bar. Create it now! */
1412             reconfig_windows();
1413         }
1414         /* First things first: clear the backbuffer */
1415         uint32_t color = colors.bar_bg;
1416         xcb_change_gc(xcb_connection,
1417                       outputs_walk->bargc,
1418                       XCB_GC_FOREGROUND,
1419                       &color);
1420         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1421         xcb_poly_fill_rectangle(xcb_connection,
1422                                 outputs_walk->buffer,
1423                                 outputs_walk->bargc,
1424                                 1,
1425                                 &rect);
1426
1427         if (!TAILQ_EMPTY(&statusline_head)) {
1428             DLOG("Printing statusline!\n");
1429
1430             /* Luckily we already prepared a seperate pixmap containing the rendered
1431              * statusline, we just have to copy the relevant parts to the relevant
1432              * position */
1433             trayclient *trayclient;
1434             int traypx = 0;
1435             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1436                 if (!trayclient->mapped)
1437                     continue;
1438                 /* We assume the tray icons are quadratic (we use the font
1439                  * *height* as *width* of the icons) because we configured them
1440                  * like this. */
1441                 traypx += font.height + 2;
1442             }
1443             /* Add 2px of padding if there are any tray icons */
1444             if (traypx > 0)
1445                 traypx += 2;
1446             xcb_copy_area(xcb_connection,
1447                           statusline_pm,
1448                           outputs_walk->buffer,
1449                           outputs_walk->bargc,
1450                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1451                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1452                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1453         }
1454
1455         if (config.disable_ws) {
1456             continue;
1457         }
1458
1459         i3_ws *ws_walk;
1460         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1461             DLOG("Drawing Button for WS %s at x = %d, len = %d\n", ws_walk->name, i, ws_walk->name_width);
1462             uint32_t fg_color = colors.inactive_ws_fg;
1463             uint32_t bg_color = colors.inactive_ws_bg;
1464             uint32_t border_color = colors.inactive_ws_border;
1465             if (ws_walk->visible) {
1466                 if (!ws_walk->focused) {
1467                     fg_color = colors.active_ws_fg;
1468                     bg_color = colors.active_ws_bg;
1469                     border_color = colors.active_ws_border;
1470                 } else {
1471                     fg_color = colors.focus_ws_fg;
1472                     bg_color = colors.focus_ws_bg;
1473                     border_color = colors.focus_ws_border;
1474                 }
1475             }
1476             if (ws_walk->urgent) {
1477                 DLOG("WS %s is urgent!\n", ws_walk->name);
1478                 fg_color = colors.urgent_ws_fg;
1479                 bg_color = colors.urgent_ws_bg;
1480                 border_color = colors.urgent_ws_border;
1481                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1482                 unhide_bars();
1483             }
1484             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1485             uint32_t vals_border[] = { border_color, border_color };
1486             xcb_change_gc(xcb_connection,
1487                           outputs_walk->bargc,
1488                           mask,
1489                           vals_border);
1490             xcb_rectangle_t rect_border = { i, 0, ws_walk->name_width + 10, font.height + 4 };
1491             xcb_poly_fill_rectangle(xcb_connection,
1492                                     outputs_walk->buffer,
1493                                     outputs_walk->bargc,
1494                                     1,
1495                                     &rect_border);
1496             uint32_t vals[] = { bg_color, bg_color };
1497             xcb_change_gc(xcb_connection,
1498                           outputs_walk->bargc,
1499                           mask,
1500                           vals);
1501             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 2 };
1502             xcb_poly_fill_rectangle(xcb_connection,
1503                                     outputs_walk->buffer,
1504                                     outputs_walk->bargc,
1505                                     1,
1506                                     &rect);
1507             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1508             draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
1509                     outputs_walk->buffer, outputs_walk->bargc, i + 5, 2, ws_walk->name_width);
1510             i += 10 + ws_walk->name_width + 1;
1511         }
1512
1513         i = 0;
1514     }
1515
1516     redraw_bars();
1517 }
1518
1519 /*
1520  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1521  *
1522  */
1523 void redraw_bars() {
1524     i3_output *outputs_walk;
1525     SLIST_FOREACH(outputs_walk, outputs, slist) {
1526         if (!outputs_walk->active) {
1527             continue;
1528         }
1529         xcb_copy_area(xcb_connection,
1530                       outputs_walk->buffer,
1531                       outputs_walk->bar,
1532                       outputs_walk->bargc,
1533                       0, 0,
1534                       0, 0,
1535                       outputs_walk->rect.w,
1536                       outputs_walk->rect.h);
1537         xcb_flush(xcb_connection);
1538     }
1539 }