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

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