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

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