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 < cur_ws->name_width + 10) {
 271                     break;
 272                 }
 273                 x -= cur_ws->name_width + 10;
 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             xembedc = xcb_get_property_unchecked(xcb_connection,
 367                                                  0,
 368                                                  client,
 369                                                  atoms[_XEMBED_INFO],
 370                                                  XCB_GET_PROPERTY_TYPE_ANY,
 371                                                  0,
 372                                                  2 * 32);
 373
 374             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 375                                                                        xembedc,
 376                                                                        NULL);
 377             if (xembedr != NULL && xembedr->length != 0) {
 378                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 379                 uint32_t *xembed = xcb_get_property_value(xembedr);
 380                 DLOG("xembed version = %d\n", xembed[0]);
 381                 DLOG("xembed flags = %d\n", xembed[1]);
 382                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 383                 xe_version = xembed[0];
 384                 if (xe_version > 1)
 385                     xe_version = 1;
 386                 free(xembedr);
 387             } else {
 388                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 389             }
 390
 391             DLOG("X window %08x requested docking\n", client);
 392             i3_output *walk, *output = NULL;
 393             SLIST_FOREACH(walk, outputs, slist) {
 394                 if (!walk->active)
 395                     continue;
 396                 if (config.tray_output &&
 397                     strcasecmp(walk->name, config.tray_output) != 0)
 398                     continue;
 399                 DLOG("using output %s\n", walk->name);
 400                 output = walk;
 401             }
 402             if (output == NULL) {
 403                 ELOG("No output found\n");
 404                 return;
 405             }
 406             xcb_reparent_window(xcb_connection,
 407                                 client,
 408                                 output->bar,
 409                                 output->rect.w - font.height - 2,
 410                                 2);
 411             /* We reconfigure the window to use a reasonable size. The systray
 412              * specification explicitly says:
 413              *   Tray icons may be assigned any size by the system tray, and
 414              *   should do their best to cope with any size effectively
 415              */
 416             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 417             values[0] = font.height;
 418             values[1] = font.height;
 419             xcb_configure_window(xcb_connection,
 420                                  client,
 421                                  mask,
 422                                  values);
 423
 424             /* send the XEMBED_EMBEDDED_NOTIFY message */
 425             void *event = scalloc(32);
 426             xcb_client_message_event_t *ev = event;
 427             ev->response_type = XCB_CLIENT_MESSAGE;
 428             ev->window = client;
 429             ev->type = atoms[_XEMBED];
 430             ev->format = 32;
 431             ev->data.data32[0] = XCB_CURRENT_TIME;
 432             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 433             ev->data.data32[2] = output->bar;
 434             ev->data.data32[3] = xe_version;
 435             xcb_send_event(xcb_connection,
 436                            0,
 437                            client,
 438                            XCB_EVENT_MASK_NO_EVENT,
 439                            (char*)ev);
 440             free(event);
 441
 442             /* Put the client inside the save set. Upon termination (whether
 443              * killed or normal exit does not matter) of i3bar, these clients
 444              * will be correctly reparented to their most closest living
 445              * ancestor. Without this, tray icons might die when i3bar
 446              * exits/crashes. */
 447             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 448
 449             if (map_it) {
 450                 DLOG("Mapping dock client\n");
 451                 xcb_map_window(xcb_connection, client);
 452             } else {
 453                 DLOG("Not mapping dock client yet\n");
 454             }
 455             trayclient *tc = smalloc(sizeof(trayclient));
 456             tc->win = client;
 457             tc->mapped = map_it;
 458             tc->xe_version = xe_version;
 459             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 460
 461             /* Trigger an update to copy the statusline text to the appropriate
 462              * position */
 463             configure_trayclients();
 464             draw_bars();
 465         }
 466     }
 467 }
 468
 469 /*
 470  * Handles UnmapNotify events. These events happen when a tray window unmaps
 471  * itself. We then update our data structure
 472  *
 473  */
 474 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 475     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 476
 477     i3_output *walk;
 478     SLIST_FOREACH(walk, outputs, slist) {
 479         if (!walk->active)
 480             continue;
 481         DLOG("checking output %s\n", walk->name);
 482         trayclient *trayclient;
 483         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 484             if (trayclient->win != event->window)
 485                 continue;
 486
 487             DLOG("Removing tray client with window ID %08x\n", event->window);
 488             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 489
 490             /* Trigger an update, we now have more space for the statusline */
 491             configure_trayclients();
 492             draw_bars();
 493             return;
 494         }
 495     }
 496 }
 497
 498 /*
 499  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 500  * handled, which tells us whether a dock client should be mapped or unmapped.
 501  *
 502  */
 503 static void handle_property_notify(xcb_property_notify_event_t *event) {
 504     DLOG("PropertyNotify\n");
 505     if (event->atom == atoms[_XEMBED_INFO] &&
 506         event->state == XCB_PROPERTY_NEW_VALUE) {
 507         DLOG("xembed_info updated\n");
 508         trayclient *trayclient = NULL, *walk;
 509         i3_output *o_walk;
 510         SLIST_FOREACH(o_walk, outputs, slist) {
 511             if (!o_walk->active)
 512                 continue;
 513
 514             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 515                 if (walk->win != event->window)
 516                     continue;
 517                 trayclient = walk;
 518                 break;
 519             }
 520
 521             if (trayclient)
 522                 break;
 523         }
 524         if (!trayclient) {
 525             ELOG("PropertyNotify received for unknown window %08x\n",
 526                  event->window);
 527             return;
 528         }
 529         xcb_get_property_cookie_t xembedc;
 530         xembedc = xcb_get_property_unchecked(xcb_connection,
 531                                              0,
 532                                              trayclient->win,
 533                                              atoms[_XEMBED_INFO],
 534                                              XCB_GET_PROPERTY_TYPE_ANY,
 535                                              0,
 536                                              2 * 32);
 537
 538         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 539                                                                    xembedc,
 540                                                                    NULL);
 541         if (xembedr == NULL || xembedr->length == 0) {
 542             DLOG("xembed_info unset\n");
 543             return;
 544         }
 545
 546         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 547         uint32_t *xembed = xcb_get_property_value(xembedr);
 548         DLOG("xembed version = %d\n", xembed[0]);
 549         DLOG("xembed flags = %d\n", xembed[1]);
 550         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 551         DLOG("map-state now %d\n", map_it);
 552         if (trayclient->mapped && !map_it) {
 553             /* need to unmap the window */
 554             xcb_unmap_window(xcb_connection, trayclient->win);
 555             trayclient->mapped = map_it;
 556             configure_trayclients();
 557             draw_bars();
 558         } else if (!trayclient->mapped && map_it) {
 559             /* need to map the window */
 560             xcb_map_window(xcb_connection, trayclient->win);
 561             trayclient->mapped = map_it;
 562             configure_trayclients();
 563             draw_bars();
 564         }
 565         free(xembedr);
 566     }
 567 }
 568
 569 /*
 570  * Handle ConfigureRequests by denying them and sending the client a
 571  * ConfigureNotify with its actual size.
 572  *
 573  */
 574 static void handle_configure_request(xcb_configure_request_event_t *event) {
 575     DLOG("ConfigureRequest for window = %08x\n", event->window);
 576
 577     trayclient *trayclient;
 578     i3_output *output;
 579     SLIST_FOREACH(output, outputs, slist) {
 580         if (!output->active)
 581             continue;
 582
 583         int clients = 0;
 584         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 585             if (!trayclient->mapped)
 586                 continue;
 587             clients++;
 588
 589             if (trayclient->win != event->window)
 590                 continue;
 591
 592             xcb_rectangle_t rect;
 593             rect.x = output->rect.w - (clients * (font.height + 2));
 594             rect.y = 2;
 595             rect.width = font.height;
 596             rect.height = font.height;
 597
 598             DLOG("This is a tray window. x = %d\n", rect.x);
 599             fake_configure_notify(xcb_connection, rect, event->window, 0);
 600             return;
 601         }
 602     }
 603
 604     DLOG("WARNING: Could not find corresponding tray window.\n");
 605 }
 606
 607 /*
 608  * This function is called immediately before the main loop locks. We flush xcb
 609  * then (and only then)
 610  *
 611  */
 612 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 613     xcb_flush(xcb_connection);
 614 }
 615
 616 /*
 617  * This function is called immediately after the main loop locks, so when one
 618  * of the watchers registered an event.
 619  * We check whether an X-Event arrived and handle it.
 620  *
 621  */
 622 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 623     xcb_generic_event_t *event;
 624
 625     if (xcb_connection_has_error(xcb_connection)) {
 626         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 627         exit(1);
 628     }
 629
 630     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 631         switch (event->response_type & ~0x80) {
 632             case XCB_EXPOSE:
 633                 /* Expose-events happen, when the window needs to be redrawn */
 634                 redraw_bars();
 635                 break;
 636             case XCB_BUTTON_PRESS:
 637                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 638                 handle_button((xcb_button_press_event_t*) event);
 639                 break;
 640             case XCB_CLIENT_MESSAGE:
 641                 /* Client messages are used for client-to-client communication, for
 642                  * example system tray widgets talk to us directly via client messages. */
 643                 handle_client_message((xcb_client_message_event_t*) event);
 644                 break;
 645             case XCB_UNMAP_NOTIFY:
 646             case XCB_DESTROY_NOTIFY:
 647                 /* UnmapNotifies are received when a tray window unmaps itself */
 648                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 649                 break;
 650             case XCB_PROPERTY_NOTIFY:
 651                 /* PropertyNotify */
 652                 handle_property_notify((xcb_property_notify_event_t*) event);
 653                 break;
 654             case XCB_CONFIGURE_REQUEST:
 655                 /* ConfigureRequest, sent by a tray child */
 656                 handle_configure_request((xcb_configure_request_event_t*) event);
 657                 break;
 658         }
 659         free(event);
 660     }
 661 }
 662
 663 /*
 664  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 665  * are triggered
 666  *
 667  */
 668 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 669 }
 670
 671 /*
 672  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 673  *
 674  */
 675 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 676     XkbEvent ev;
 677     int modstate = 0;
 678
 679     DLOG("Got XKB-Event!\n");
 680
 681     while (XPending(xkb_dpy)) {
 682         XNextEvent(xkb_dpy, (XEvent*)&ev);
 683
 684         if (ev.type != xkb_event_base) {
 685             ELOG("No Xkb-Event!\n");
 686             continue;
 687         }
 688
 689         if (ev.any.xkb_type != XkbStateNotify) {
 690             ELOG("No State Notify!\n");
 691             continue;
 692         }
 693
 694         unsigned int mods = ev.state.mods;
 695         modstate = mods & config.modifier;
 696     }
 697
 698 #define DLOGMOD(modmask, status, barfunc) \
 699     do { \
 700         switch (modmask) { \
 701             case ShiftMask: \
 702                 DLOG("ShiftMask got " #status "!\n"); \
 703                 break; \
 704             case ControlMask: \
 705                 DLOG("ControlMask got " #status "!\n"); \
 706                 break; \
 707             case Mod1Mask: \
 708                 DLOG("Mod1Mask got " #status "!\n"); \
 709                 break; \
 710             case Mod2Mask: \
 711                 DLOG("Mod2Mask got " #status "!\n"); \
 712                 break; \
 713             case Mod3Mask: \
 714                 DLOG("Mod3Mask got " #status "!\n"); \
 715                 break; \
 716             case Mod4Mask: \
 717                 DLOG("Mod4Mask got " #status "!\n"); \
 718                 break; \
 719             case Mod5Mask: \
 720                 DLOG("Mod5Mask got " #status "!\n"); \
 721                 break; \
 722         } \
 723         barfunc(); \
 724     } while (0)
 725
 726     if (modstate != mod_pressed) {
 727         if (modstate == 0) {
 728             DLOGMOD(config.modifier, released, hide_bars);
 729         } else {
 730             DLOGMOD(config.modifier, pressed, unhide_bars);
 731         }
 732         mod_pressed = modstate;
 733     }
 734
 735 #undef DLOGMOD
 736 }
 737
 738 /*
 739  * Early initialization of the connection to X11: Everything which does not
 740  * depend on 'config'.
 741  *
 742  */
 743 char *init_xcb_early() {
 744     /* FIXME: xcb_connect leaks Memory */
 745     xcb_connection = xcb_connect(NULL, &screen);
 746     if (xcb_connection_has_error(xcb_connection)) {
 747         ELOG("Cannot open display\n");
 748         exit(EXIT_FAILURE);
 749     }
 750     conn = xcb_connection;
 751     DLOG("Connected to xcb\n");
 752
 753     /* We have to request the atoms we need */
 754     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 755     #include "xcb_atoms.def"
 756
 757     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 758     xcb_root = xcb_screen->root;
 759
 760     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 761      * this way, we can choose to crop it */
 762     uint32_t mask = XCB_GC_FOREGROUND;
 763     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 764
 765     statusline_clear = xcb_generate_id(xcb_connection);
 766     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 767                                                                statusline_clear,
 768                                                                xcb_root,
 769                                                                mask,
 770                                                                vals);
 771
 772     statusline_ctx = xcb_generate_id(xcb_connection);
 773     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 774                                                             statusline_ctx,
 775                                                             xcb_root,
 776                                                             0,
 777                                                             NULL);
 778
 779     statusline_pm = xcb_generate_id(xcb_connection);
 780     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 781                                                                xcb_screen->root_depth,
 782                                                                statusline_pm,
 783                                                                xcb_root,
 784                                                                xcb_screen->width_in_pixels,
 785                                                                xcb_screen->height_in_pixels);
 786
 787
 788     /* The various Watchers to communicate with xcb */
 789     xcb_io = smalloc(sizeof(ev_io));
 790     xcb_prep = smalloc(sizeof(ev_prepare));
 791     xcb_chk = smalloc(sizeof(ev_check));
 792
 793     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 794     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 795     ev_check_init(xcb_chk, &xcb_chk_cb);
 796
 797     ev_io_start(main_loop, xcb_io);
 798     ev_prepare_start(main_loop, xcb_prep);
 799     ev_check_start(main_loop, xcb_chk);
 800
 801     /* Now we get the atoms and save them in a nice data structure */
 802     get_atoms();
 803
 804     xcb_get_property_cookie_t path_cookie;
 805     path_cookie = xcb_get_property_unchecked(xcb_connection,
 806                                    0,
 807                                    xcb_root,
 808                                    atoms[I3_SOCKET_PATH],
 809                                    XCB_GET_PROPERTY_TYPE_ANY,
 810                                    0, PATH_MAX);
 811
 812     /* We check, if i3 set its socket-path */
 813     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 814                                                                   path_cookie,
 815                                                                   NULL);
 816     char *path = NULL;
 817     if (path_reply) {
 818         int len = xcb_get_property_value_length(path_reply);
 819         if (len != 0) {
 820             path = strndup(xcb_get_property_value(path_reply), len);
 821         }
 822     }
 823
 824
 825     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 826         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 827         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 828         exit(EXIT_FAILURE);
 829     }
 830
 831     return path;
 832 }
 833
 834 /*
 835  * Initialization which depends on 'config' being usable. Called after the
 836  * configuration has arrived.
 837  *
 838  */
 839 void init_xcb_late(char *fontname) {
 840     if (fontname == NULL)
 841         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 842
 843     /* Load the font */
 844     font = load_font(fontname, true);
 845     set_font(&font);
 846     DLOG("Calculated Font-height: %d\n", font.height);
 847
 848     xcb_flush(xcb_connection);
 849
 850     /* To grab modifiers without blocking other applications from receiving key-events
 851      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 852      * in xcb */
 853     if (config.hide_on_modifier) {
 854         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 855         xkb_major = XkbMajorVersion;
 856         xkb_minor = XkbMinorVersion;
 857
 858         xkb_dpy = XkbOpenDisplay(NULL,
 859                                  &xkb_event_base,
 860                                  &xkb_errbase,
 861                                  &xkb_major,
 862                                  &xkb_minor,
 863                                  &xkb_err);
 864
 865         if (xkb_dpy == NULL) {
 866             ELOG("No XKB!\n");
 867             exit(EXIT_FAILURE);
 868         }
 869
 870         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 871             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 872             exit(EXIT_FAILURE);
 873         }
 874
 875         int i1;
 876         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 877             ELOG("XKB not supported by X-server!\n");
 878             exit(EXIT_FAILURE);
 879         }
 880
 881         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 882             ELOG("Could not grab Key!\n");
 883             exit(EXIT_FAILURE);
 884         }
 885
 886         xkb_io = smalloc(sizeof(ev_io));
 887         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 888         ev_io_start(main_loop, xkb_io);
 889         XFlush(xkb_dpy);
 890     }
 891 }
 892
 893 /*
 894  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 895  * for the X11 display we are running on, then acquiring the selection for this
 896  * atom. Afterwards, tray clients will send ClientMessages to our window.
 897  *
 898  */
 899 void init_tray() {
 900     DLOG("Initializing system tray functionality\n");
 901     /* request the tray manager atom for the X11 display we are running on */
 902     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 903     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 904     xcb_intern_atom_cookie_t tray_cookie;
 905     xcb_intern_atom_reply_t *tray_reply;
 906     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 907
 908     /* tray support: we need a window to own the selection */
 909     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 910     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 911     uint32_t selval[] = { 1 };
 912     xcb_create_window(xcb_connection,
 913                       xcb_screen->root_depth,
 914                       selwin,
 915                       xcb_root,
 916                       -1, -1,
 917                       1, 1,
 918                       1,
 919                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 920                       xcb_screen->root_visual,
 921                       selmask,
 922                       selval);
 923
 924     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 925     /* set the atoms */
 926     xcb_change_property(xcb_connection,
 927                         XCB_PROP_MODE_REPLACE,
 928                         selwin,
 929                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 930                         XCB_ATOM_CARDINAL,
 931                         32,
 932                         1,
 933                         &orientation);
 934
 935     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 936         ELOG("Could not get atom %s\n", atomname);
 937         exit(EXIT_FAILURE);
 938     }
 939
 940     xcb_set_selection_owner(xcb_connection,
 941                             selwin,
 942                             tray_reply->atom,
 943                             XCB_CURRENT_TIME);
 944
 945     /* Verify that we have the selection */
 946     xcb_get_selection_owner_cookie_t selcookie;
 947     xcb_get_selection_owner_reply_t *selreply;
 948
 949     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
 950     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
 951         ELOG("Could not get selection owner for %s\n", atomname);
 952         exit(EXIT_FAILURE);
 953     }
 954
 955     if (selreply->owner != selwin) {
 956         ELOG("Could not set the %s selection. " \
 957              "Maybe another tray is already running?\n", atomname);
 958         /* NOTE that this error is not fatal. We just can’t provide tray
 959          * functionality */
 960         free(selreply);
 961         return;
 962     }
 963
 964     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
 965     void *event = scalloc(32);
 966     xcb_client_message_event_t *ev = event;
 967     ev->response_type = XCB_CLIENT_MESSAGE;
 968     ev->window = xcb_root;
 969     ev->type = atoms[MANAGER];
 970     ev->format = 32;
 971     ev->data.data32[0] = XCB_CURRENT_TIME;
 972     ev->data.data32[1] = tray_reply->atom;
 973     ev->data.data32[2] = selwin;
 974     xcb_send_event(xcb_connection,
 975                    0,
 976                    xcb_root,
 977                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 978                    (char*)ev);
 979     free(event);
 980     free(tray_reply);
 981 }
 982
 983 /*
 984  * Cleanup the xcb-stuff.
 985  * Called once, before the program terminates.
 986  *
 987  */
 988 void clean_xcb() {
 989     i3_output *o_walk;
 990     trayclient *trayclient;
 991     free_workspaces();
 992     SLIST_FOREACH(o_walk, outputs, slist) {
 993         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
 994             /* Unmap, then reparent (to root) the tray client windows */
 995             xcb_unmap_window(xcb_connection, trayclient->win);
 996             xcb_reparent_window(xcb_connection,
 997                                 trayclient->win,
 998                                 xcb_root,
 999                                 0,
1000                                 0);
1001         }
1002         destroy_window(o_walk);
1003         FREE(o_walk->trayclients);
1004         FREE(o_walk->workspaces);
1005         FREE(o_walk->name);
1006     }
1007     FREE_SLIST(outputs, i3_output);
1008     FREE(outputs);
1009
1010     xcb_flush(xcb_connection);
1011     xcb_disconnect(xcb_connection);
1012
1013     ev_check_stop(main_loop, xcb_chk);
1014     ev_prepare_stop(main_loop, xcb_prep);
1015     ev_io_stop(main_loop, xcb_io);
1016
1017     FREE(xcb_chk);
1018     FREE(xcb_prep);
1019     FREE(xcb_io);
1020 }
1021
1022 /*
1023  * Get the earlier requested atoms and save them in the prepared data structure
1024  *
1025  */
1026 void get_atoms() {
1027     xcb_intern_atom_reply_t *reply;
1028     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1029         if (reply == NULL) { \
1030             ELOG("Could not get atom %s\n", #name); \
1031             exit(EXIT_FAILURE); \
1032         } \
1033         atoms[name] = reply->atom; \
1034         free(reply);
1035
1036     #include "xcb_atoms.def"
1037     DLOG("Got Atoms\n");
1038 }
1039
1040 /*
1041  * Destroy the bar of the specified output
1042  *
1043  */
1044 void destroy_window(i3_output *output) {
1045     if (output == NULL) {
1046         return;
1047     }
1048     if (output->bar == XCB_NONE) {
1049         return;
1050     }
1051     xcb_destroy_window(xcb_connection, output->bar);
1052     output->bar = XCB_NONE;
1053 }
1054
1055 /*
1056  * Reallocate the statusline-buffer
1057  *
1058  */
1059 void realloc_sl_buffer() {
1060     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1061          statusline_width, xcb_screen->width_in_pixels);
1062     xcb_free_pixmap(xcb_connection, statusline_pm);
1063     statusline_pm = xcb_generate_id(xcb_connection);
1064     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1065                                                                xcb_screen->root_depth,
1066                                                                statusline_pm,
1067                                                                xcb_root,
1068                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1069                                                                xcb_screen->height_in_pixels);
1070
1071     uint32_t mask = XCB_GC_FOREGROUND;
1072     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1073     xcb_free_gc(xcb_connection, statusline_clear);
1074     statusline_clear = xcb_generate_id(xcb_connection);
1075     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1076                                                                statusline_clear,
1077                                                                xcb_root,
1078                                                                mask,
1079                                                                vals);
1080
1081     mask |= XCB_GC_BACKGROUND;
1082     vals[0] = colors.bar_fg;
1083     statusline_ctx = xcb_generate_id(xcb_connection);
1084     xcb_free_gc(xcb_connection, statusline_ctx);
1085     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1086                                                             statusline_ctx,
1087                                                             xcb_root,
1088                                                             mask,
1089                                                             vals);
1090
1091     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1092         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1093         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1094         exit(EXIT_FAILURE);
1095     }
1096
1097 }
1098
1099 /*
1100  * Reconfigure all bars and create new bars for recently activated outputs
1101  *
1102  */
1103 void reconfig_windows() {
1104     uint32_t mask;
1105     uint32_t values[5];
1106     static bool tray_configured = false;
1107
1108     i3_output *walk;
1109     SLIST_FOREACH(walk, outputs, slist) {
1110         if (!walk->active) {
1111             /* If an output is not active, we destroy its bar */
1112             /* FIXME: Maybe we rather want to unmap? */
1113             DLOG("Destroying window for output %s\n", walk->name);
1114             destroy_window(walk);
1115             continue;
1116         }
1117         if (walk->bar == XCB_NONE) {
1118             DLOG("Creating Window for output %s\n", walk->name);
1119
1120             walk->bar = xcb_generate_id(xcb_connection);
1121             walk->buffer = xcb_generate_id(xcb_connection);
1122             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1123             /* Black background */
1124             values[0] = colors.bar_bg;
1125             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1126             values[1] = config.hide_on_modifier;
1127             /* We enable the following EventMask fields:
1128              * EXPOSURE, to get expose events (we have to re-draw then)
1129              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1130              *                        child windows use ConfigureWindow
1131              * BUTTON_PRESS, to handle clicks on the workspace buttons
1132              * */
1133             values[2] = XCB_EVENT_MASK_EXPOSURE |
1134                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1135             if (!config.disable_ws) {
1136                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1137             }
1138             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1139                                                                      xcb_screen->root_depth,
1140                                                                      walk->bar,
1141                                                                      xcb_root,
1142                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1143                                                                      walk->rect.w, font.height + 6,
1144                                                                      1,
1145                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1146                                                                      xcb_screen->root_visual,
1147                                                                      mask,
1148                                                                      values);
1149
1150             /* The double-buffer we use to render stuff off-screen */
1151             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1152                                                                     xcb_screen->root_depth,
1153                                                                     walk->buffer,
1154                                                                     walk->bar,
1155                                                                     walk->rect.w,
1156                                                                     walk->rect.h);
1157
1158             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1159             xcb_void_cookie_t class_cookie;
1160             class_cookie = xcb_change_property(xcb_connection,
1161                                                XCB_PROP_MODE_REPLACE,
1162                                                walk->bar,
1163                                                XCB_ATOM_WM_CLASS,
1164                                                XCB_ATOM_STRING,
1165                                                8,
1166                                                (strlen("i3bar") + 1) * 2,
1167                                                "i3bar\0i3bar\0");
1168
1169             char *name;
1170             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1171                 err(EXIT_FAILURE, "asprintf()");
1172             xcb_void_cookie_t name_cookie;
1173             name_cookie = xcb_change_property(xcb_connection,
1174                                               XCB_PROP_MODE_REPLACE,
1175                                               walk->bar,
1176                                               XCB_ATOM_WM_NAME,
1177                                               XCB_ATOM_STRING,
1178                                               8,
1179                                               strlen(name),
1180                                               name);
1181             free(name);
1182
1183             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1184              * this one */
1185             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1186                                                                 XCB_PROP_MODE_REPLACE,
1187                                                                 walk->bar,
1188                                                                 atoms[_NET_WM_WINDOW_TYPE],
1189                                                                 XCB_ATOM_ATOM,
1190                                                                 32,
1191                                                                 1,
1192                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1193
1194             /* We need to tell i3, where to reserve space for i3bar */
1195             /* left, right, top, bottom, left_start_y, left_end_y,
1196              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1197              * bottom_end_x */
1198             /* A local struct to save the strut_partial property */
1199             struct {
1200                 uint32_t left;
1201                 uint32_t right;
1202                 uint32_t top;
1203                 uint32_t bottom;
1204                 uint32_t left_start_y;
1205                 uint32_t left_end_y;
1206                 uint32_t right_start_y;
1207                 uint32_t right_end_y;
1208                 uint32_t top_start_x;
1209                 uint32_t top_end_x;
1210                 uint32_t bottom_start_x;
1211                 uint32_t bottom_end_x;
1212             } __attribute__((__packed__)) strut_partial = {0,};
1213             switch (config.position) {
1214                 case POS_NONE:
1215                     break;
1216                 case POS_TOP:
1217                     strut_partial.top = font.height + 6;
1218                     strut_partial.top_start_x = walk->rect.x;
1219                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1220                     break;
1221                 case POS_BOT:
1222                     strut_partial.bottom = font.height + 6;
1223                     strut_partial.bottom_start_x = walk->rect.x;
1224                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1225                     break;
1226             }
1227             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1228                                                                  XCB_PROP_MODE_REPLACE,
1229                                                                  walk->bar,
1230                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1231                                                                  XCB_ATOM_CARDINAL,
1232                                                                  32,
1233                                                                  12,
1234                                                                  &strut_partial);
1235
1236             /* We also want a graphics-context for the bars (it defines the properties
1237              * with which we draw to them) */
1238             walk->bargc = xcb_generate_id(xcb_connection);
1239             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1240                                                                 walk->bargc,
1241                                                                 walk->bar,
1242                                                                 0,
1243                                                                 NULL);
1244
1245             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1246             xcb_void_cookie_t map_cookie;
1247             if (!config.hide_on_modifier) {
1248                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1249             }
1250
1251             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1252                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1253                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1254                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1255                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1256                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1257                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1258                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1259                 exit(EXIT_FAILURE);
1260             }
1261
1262             if (!tray_configured &&
1263                 (!config.tray_output ||
1264                  strcasecmp("none", config.tray_output) != 0)) {
1265                 init_tray();
1266                 tray_configured = true;
1267             }
1268         } else {
1269             /* We already have a bar, so we just reconfigure it */
1270             mask = XCB_CONFIG_WINDOW_X |
1271                    XCB_CONFIG_WINDOW_Y |
1272                    XCB_CONFIG_WINDOW_WIDTH |
1273                    XCB_CONFIG_WINDOW_HEIGHT |
1274                    XCB_CONFIG_WINDOW_STACK_MODE;
1275             values[0] = walk->rect.x;
1276             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1277             values[2] = walk->rect.w;
1278             values[3] = font.height + 6;
1279             values[4] = XCB_STACK_MODE_ABOVE;
1280
1281             DLOG("Destroying buffer for output %s", walk->name);
1282             xcb_free_pixmap(xcb_connection, walk->buffer);
1283
1284             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1285             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1286                                                                         walk->bar,
1287                                                                         mask,
1288                                                                         values);
1289
1290             DLOG("Recreating buffer for output %s", walk->name);
1291             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1292                                                                     xcb_screen->root_depth,
1293                                                                     walk->buffer,
1294                                                                     walk->bar,
1295                                                                     walk->rect.w,
1296                                                                     walk->rect.h);
1297
1298             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1299                 exit(EXIT_FAILURE);
1300             }
1301             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1302                 exit(EXIT_FAILURE);
1303             }
1304         }
1305     }
1306 }
1307
1308 /*
1309  * Render the bars, with buttons and statusline
1310  *
1311  */
1312 void draw_bars() {
1313     DLOG("Drawing Bars...\n");
1314     int i = 0;
1315
1316     refresh_statusline();
1317
1318     i3_output *outputs_walk;
1319     SLIST_FOREACH(outputs_walk, outputs, slist) {
1320         if (!outputs_walk->active) {
1321             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1322             continue;
1323         }
1324         if (outputs_walk->bar == XCB_NONE) {
1325             /* Oh shit, an active output without an own bar. Create it now! */
1326             reconfig_windows();
1327         }
1328         /* First things first: clear the backbuffer */
1329         uint32_t color = colors.bar_bg;
1330         xcb_change_gc(xcb_connection,
1331                       outputs_walk->bargc,
1332                       XCB_GC_FOREGROUND,
1333                       &color);
1334         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1335         xcb_poly_fill_rectangle(xcb_connection,
1336                                 outputs_walk->buffer,
1337                                 outputs_walk->bargc,
1338                                 1,
1339                                 &rect);
1340
1341         if (statusline != NULL) {
1342             DLOG("Printing statusline!\n");
1343
1344             /* Luckily we already prepared a seperate pixmap containing the rendered
1345              * statusline, we just have to copy the relevant parts to the relevant
1346              * position */
1347             trayclient *trayclient;
1348             int traypx = 0;
1349             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1350                 if (!trayclient->mapped)
1351                     continue;
1352                 /* We assume the tray icons are quadratic (we use the font
1353                  * *height* as *width* of the icons) because we configured them
1354                  * like this. */
1355                 traypx += font.height + 2;
1356             }
1357             /* Add 2px of padding if there are any tray icons */
1358             if (traypx > 0)
1359                 traypx += 2;
1360             xcb_copy_area(xcb_connection,
1361                           statusline_pm,
1362                           outputs_walk->buffer,
1363                           outputs_walk->bargc,
1364                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1365                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1366                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1367         }
1368
1369         if (config.disable_ws) {
1370             continue;
1371         }
1372
1373         i3_ws *ws_walk;
1374         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1375             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1376             uint32_t fg_color = colors.inactive_ws_fg;
1377             uint32_t bg_color = colors.inactive_ws_bg;
1378             uint32_t border_color = colors.inactive_ws_border;
1379             if (ws_walk->visible) {
1380                 if (!ws_walk->focused) {
1381                     fg_color = colors.active_ws_fg;
1382                     bg_color = colors.active_ws_bg;
1383                     border_color = colors.active_ws_border;
1384                 } else {
1385                     fg_color = colors.focus_ws_fg;
1386                     bg_color = colors.focus_ws_bg;
1387                     border_color = colors.focus_ws_border;
1388                 }
1389             }
1390             if (ws_walk->urgent) {
1391                 DLOG("WS %s is urgent!\n", ws_walk->name);
1392                 fg_color = colors.urgent_ws_fg;
1393                 bg_color = colors.urgent_ws_bg;
1394                 border_color = colors.urgent_ws_border;
1395                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1396                 unhide_bars();
1397             }
1398             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1399             uint32_t vals_border[] = { border_color, border_color };
1400             xcb_change_gc(xcb_connection,
1401                           outputs_walk->bargc,
1402                           mask,
1403                           vals_border);
1404             xcb_rectangle_t rect_border = { i + 1, 0, ws_walk->name_width + 10, font.height + 4 };
1405             xcb_poly_fill_rectangle(xcb_connection,
1406                                     outputs_walk->buffer,
1407                                     outputs_walk->bargc,
1408                                     1,
1409                                     &rect_border);
1410             uint32_t vals[] = { bg_color, bg_color };
1411             xcb_change_gc(xcb_connection,
1412                           outputs_walk->bargc,
1413                           mask,
1414                           vals);
1415             xcb_rectangle_t rect = { i + 2, 1, ws_walk->name_width + 8, font.height + 2 };
1416             xcb_poly_fill_rectangle(xcb_connection,
1417                                     outputs_walk->buffer,
1418                                     outputs_walk->bargc,
1419                                     1,
1420                                     &rect);
1421             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1422             draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
1423                     outputs_walk->buffer, outputs_walk->bargc, i + 6, 2, ws_walk->name_width);
1424             i += 12 + ws_walk->name_width;
1425         }
1426
1427         i = 0;
1428     }
1429
1430     redraw_bars();
1431 }
1432
1433 /*
1434  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1435  *
1436  */
1437 void redraw_bars() {
1438     i3_output *outputs_walk;
1439     SLIST_FOREACH(outputs_walk, outputs, slist) {
1440         if (!outputs_walk->active) {
1441             continue;
1442         }
1443         xcb_copy_area(xcb_connection,
1444                       outputs_walk->buffer,
1445                       outputs_walk->bar,
1446                       outputs_walk->bargc,
1447                       0, 0,
1448                       0, 0,
1449                       outputs_walk->rect.w,
1450                       outputs_walk->rect.h);
1451         xcb_flush(xcb_connection);
1452     }
1453 }