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

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_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     *root_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(void) {
 112     struct status_block *block;
 113
 114     uint32_t old_statusline_width = statusline_width;
 115     statusline_width = 0;
 116
 117     /* Predict the text width of all blocks (in pixels). */
 118     TAILQ_FOREACH(block, &statusline_head, blocks) {
 119         if (i3string_get_num_bytes(block->full_text) == 0)
 120             continue;
 121
 122         block->width = predict_text_width(block->full_text);
 123         /* If this is not the last block, add some pixels for a separator. */
 124         if (TAILQ_NEXT(block, blocks) != NULL)
 125             block->width += 9;
 126         statusline_width += block->width;
 127     }
 128
 129     /* If the statusline is bigger than our screen we need to make sure that
 130      * the pixmap provides enough space, so re-allocate if the width grew */
 131     if (statusline_width > root_screen->width_in_pixels &&
 132         statusline_width > old_statusline_width)
 133         realloc_sl_buffer();
 134
 135     /* Clear the statusline pixmap. */
 136     xcb_rectangle_t rect = { 0, 0, root_screen->width_in_pixels, font.height };
 137     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 138
 139     /* Draw the text of each block. */
 140     uint32_t x = 0;
 141     TAILQ_FOREACH(block, &statusline_head, blocks) {
 142         if (i3string_get_num_bytes(block->full_text) == 0)
 143             continue;
 144
 145         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 146         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 147         draw_text(block->full_text, statusline_pm, statusline_ctx, x, 0, block->width);
 148         x += block->width;
 149
 150         if (TAILQ_NEXT(block, blocks) != NULL) {
 151             /* This is not the last block, draw a separator. */
 152             set_font_colors(statusline_ctx, get_colorpixel("#666666"), colors.bar_bg);
 153             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 154                           statusline_ctx, 2,
 155                           (xcb_point_t[]){ { x - 5, 2 }, { x - 5, font.height - 2 } });
 156         }
 157     }
 158 }
 159
 160 /*
 161  * Hides all bars (unmaps them)
 162  *
 163  */
 164 void hide_bars(void) {
 165     if (!config.hide_on_modifier) {
 166         return;
 167     }
 168
 169     i3_output *walk;
 170     SLIST_FOREACH(walk, outputs, slist) {
 171         if (!walk->active) {
 172             continue;
 173         }
 174         xcb_unmap_window(xcb_connection, walk->bar);
 175     }
 176     stop_child();
 177 }
 178
 179 /*
 180  * Unhides all bars (maps them)
 181  *
 182  */
 183 void unhide_bars(void) {
 184     if (!config.hide_on_modifier) {
 185         return;
 186     }
 187
 188     i3_output           *walk;
 189     xcb_void_cookie_t   cookie;
 190     uint32_t            mask;
 191     uint32_t            values[5];
 192
 193     cont_child();
 194
 195     SLIST_FOREACH(walk, outputs, slist) {
 196         if (walk->bar == XCB_NONE) {
 197             continue;
 198         }
 199         mask = XCB_CONFIG_WINDOW_X |
 200                XCB_CONFIG_WINDOW_Y |
 201                XCB_CONFIG_WINDOW_WIDTH |
 202                XCB_CONFIG_WINDOW_HEIGHT |
 203                XCB_CONFIG_WINDOW_STACK_MODE;
 204         values[0] = walk->rect.x;
 205         if (config.position == POS_TOP)
 206             values[1] = walk->rect.y;
 207         else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
 208         values[2] = walk->rect.w;
 209         values[3] = font.height + 6;
 210         values[4] = XCB_STACK_MODE_ABOVE;
 211         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 212         cookie = xcb_configure_window_checked(xcb_connection,
 213                                               walk->bar,
 214                                               mask,
 215                                               values);
 216
 217         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 218             exit(EXIT_FAILURE);
 219         }
 220         xcb_map_window(xcb_connection, walk->bar);
 221     }
 222 }
 223
 224 /*
 225  * Parse the colors into a format that we can use
 226  *
 227  */
 228 void init_colors(const struct xcb_color_strings_t *new_colors) {
 229 #define PARSE_COLOR(name, def) \
 230     do { \
 231         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 232     } while  (0)
 233     PARSE_COLOR(bar_fg, "#FFFFFF");
 234     PARSE_COLOR(bar_bg, "#000000");
 235     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 236     PARSE_COLOR(active_ws_bg, "#333333");
 237     PARSE_COLOR(active_ws_border, "#333333");
 238     PARSE_COLOR(inactive_ws_fg, "#888888");
 239     PARSE_COLOR(inactive_ws_bg, "#222222");
 240     PARSE_COLOR(inactive_ws_border, "#333333");
 241     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 242     PARSE_COLOR(urgent_ws_bg, "#900000");
 243     PARSE_COLOR(urgent_ws_border, "#2f343a");
 244     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 245     PARSE_COLOR(focus_ws_bg, "#285577");
 246     PARSE_COLOR(focus_ws_border, "#4c7899");
 247 #undef PARSE_COLOR
 248 }
 249
 250 /*
 251  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 252  * We determine, whether the click occured on a ws-button or if the scroll-
 253  * wheel was used and change the workspace appropriately
 254  *
 255  */
 256 void handle_button(xcb_button_press_event_t *event) {
 257     i3_ws *cur_ws;
 258
 259     /* Determine, which bar was clicked */
 260     i3_output *walk;
 261     xcb_window_t bar = event->event;
 262     SLIST_FOREACH(walk, outputs, slist) {
 263         if (walk->bar == bar) {
 264             break;
 265         }
 266     }
 267
 268     if (walk == NULL) {
 269         DLOG("Unknown Bar klicked!\n");
 270         return;
 271     }
 272
 273     /* TODO: Move this to extern get_ws_for_output() */
 274     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 275         if (cur_ws->visible) {
 276             break;
 277         }
 278     }
 279
 280     if (cur_ws == NULL) {
 281         DLOG("No Workspace active?\n");
 282         return;
 283     }
 284
 285     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 286
 287     DLOG("Got Button %d\n", event->detail);
 288
 289     switch (event->detail) {
 290         case 1:
 291             /* Left Mousbutton. We determine, which button was clicked
 292              * and set cur_ws accordingly */
 293             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 294                 DLOG("x = %d\n", x);
 295                 if (x >= 0 && x < cur_ws->name_width + 10) {
 296                     break;
 297                 }
 298                 x -= cur_ws->name_width + 11;
 299             }
 300             if (cur_ws == NULL) {
 301                 return;
 302             }
 303             break;
 304         case 4:
 305             /* Mouse wheel down. We select the next ws */
 306             if (cur_ws != TAILQ_FIRST(walk->workspaces)) {
 307                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 308             }
 309             break;
 310         case 5:
 311             /* Mouse wheel up. We select the previos ws */
 312             if (cur_ws != TAILQ_LAST(walk->workspaces, ws_head)) {
 313                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 314             }
 315             break;
 316     }
 317
 318     /* To properly handle workspace names with double quotes in them, we need
 319      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 320      * first count the number of double quotes, then we allocate a large enough
 321      * buffer, then we copy character by character. */
 322     int num_quotes = 0;
 323     size_t namelen = 0;
 324     const char *utf8_name = i3string_as_utf8(cur_ws->name);
 325     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 326         if (*walk == '"')
 327             num_quotes++;
 328         /* While we’re looping through the name anyway, we can save one
 329          * strlen(). */
 330         namelen++;
 331     }
 332
 333     const size_t len = namelen + strlen("workspace \"\"") + 1;
 334     char *buffer = scalloc(len+num_quotes);
 335     strncpy(buffer, "workspace \"", strlen("workspace \""));
 336     int inpos, outpos;
 337     for (inpos = 0, outpos = strlen("workspace \"");
 338          inpos < namelen;
 339          inpos++, outpos++) {
 340         if (utf8_name[inpos] == '"') {
 341             buffer[outpos] = '\\';
 342             outpos++;
 343         }
 344         buffer[outpos] = utf8_name[inpos];
 345     }
 346     buffer[outpos] = '"';
 347     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 348     free(buffer);
 349 }
 350
 351 /*
 352  * Configures the x coordinate of all trayclients. To be called after adding a
 353  * new tray client or removing an old one.
 354  *
 355  */
 356 static void configure_trayclients(void) {
 357     trayclient *trayclient;
 358     i3_output *output;
 359     SLIST_FOREACH(output, outputs, slist) {
 360         if (!output->active)
 361             continue;
 362
 363         int clients = 0;
 364         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 365             if (!trayclient->mapped)
 366                 continue;
 367             clients++;
 368
 369             DLOG("Configuring tray window %08x to x=%d\n",
 370                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 371             uint32_t x = output->rect.w - (clients * (font.height + 2));
 372             xcb_configure_window(xcb_connection,
 373                                  trayclient->win,
 374                                  XCB_CONFIG_WINDOW_X,
 375                                  &x);
 376         }
 377     }
 378 }
 379
 380 /*
 381  * Handles ClientMessages (messages sent from another client directly to us).
 382  *
 383  * At the moment, only the tray window will receive client messages. All
 384  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 385  *
 386  */
 387 static void handle_client_message(xcb_client_message_event_t* event) {
 388     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 389         event->format == 32) {
 390         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 391         /* event->data.data32[0] is the timestamp */
 392         uint32_t op = event->data.data32[1];
 393         uint32_t mask;
 394         uint32_t values[2];
 395         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 396             xcb_window_t client = event->data.data32[2];
 397
 398             /* Listen for PropertyNotify events to get the most recent value of
 399              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 400             mask = XCB_CW_EVENT_MASK;
 401             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 402                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 403             xcb_change_window_attributes(xcb_connection,
 404                                          client,
 405                                          mask,
 406                                          values);
 407
 408             /* Request the _XEMBED_INFO property. The XEMBED specification
 409              * (which is referred by the tray specification) says this *has* to
 410              * be set, but VLC does not set it… */
 411             bool map_it = true;
 412             int xe_version = 1;
 413             xcb_get_property_cookie_t xembedc;
 414             xcb_generic_error_t *error;
 415             xembedc = xcb_get_property(xcb_connection,
 416                                        0,
 417                                        client,
 418                                        atoms[_XEMBED_INFO],
 419                                        XCB_GET_PROPERTY_TYPE_ANY,
 420                                        0,
 421                                        2 * 32);
 422
 423             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 424                                                                        xembedc,
 425                                                                        &error);
 426             if (error != NULL) {
 427                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 428                      error->error_code);
 429                 free(error);
 430                 return;
 431             }
 432             if (xembedr != NULL && xembedr->length != 0) {
 433                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 434                 uint32_t *xembed = xcb_get_property_value(xembedr);
 435                 DLOG("xembed version = %d\n", xembed[0]);
 436                 DLOG("xembed flags = %d\n", xembed[1]);
 437                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 438                 xe_version = xembed[0];
 439                 if (xe_version > 1)
 440                     xe_version = 1;
 441                 free(xembedr);
 442             } else {
 443                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 444             }
 445
 446             DLOG("X window %08x requested docking\n", client);
 447             i3_output *walk, *output = NULL;
 448             SLIST_FOREACH(walk, outputs, slist) {
 449                 if (!walk->active)
 450                     continue;
 451                 if (config.tray_output) {
 452                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 453                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 454                         continue;
 455                 }
 456
 457                 DLOG("using output %s\n", walk->name);
 458                 output = walk;
 459                 break;
 460             }
 461             /* In case of tray_output == primary and there is no primary output
 462              * configured, we fall back to the first available output. */
 463             if (output == NULL && strcasecmp("primary", config.tray_output) == 0) {
 464                 SLIST_FOREACH(walk, outputs, slist) {
 465                     if (!walk->active)
 466                         continue;
 467                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 468                     output = walk;
 469                     break;
 470                 }
 471             }
 472             if (output == NULL) {
 473                 ELOG("No output found\n");
 474                 return;
 475             }
 476             xcb_reparent_window(xcb_connection,
 477                                 client,
 478                                 output->bar,
 479                                 output->rect.w - font.height - 2,
 480                                 2);
 481             /* We reconfigure the window to use a reasonable size. The systray
 482              * specification explicitly says:
 483              *   Tray icons may be assigned any size by the system tray, and
 484              *   should do their best to cope with any size effectively
 485              */
 486             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 487             values[0] = font.height;
 488             values[1] = font.height;
 489             xcb_configure_window(xcb_connection,
 490                                  client,
 491                                  mask,
 492                                  values);
 493
 494             /* send the XEMBED_EMBEDDED_NOTIFY message */
 495             void *event = scalloc(32);
 496             xcb_client_message_event_t *ev = event;
 497             ev->response_type = XCB_CLIENT_MESSAGE;
 498             ev->window = client;
 499             ev->type = atoms[_XEMBED];
 500             ev->format = 32;
 501             ev->data.data32[0] = XCB_CURRENT_TIME;
 502             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 503             ev->data.data32[2] = output->bar;
 504             ev->data.data32[3] = xe_version;
 505             xcb_send_event(xcb_connection,
 506                            0,
 507                            client,
 508                            XCB_EVENT_MASK_NO_EVENT,
 509                            (char*)ev);
 510             free(event);
 511
 512             /* Put the client inside the save set. Upon termination (whether
 513              * killed or normal exit does not matter) of i3bar, these clients
 514              * will be correctly reparented to their most closest living
 515              * ancestor. Without this, tray icons might die when i3bar
 516              * exits/crashes. */
 517             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 518
 519             if (map_it) {
 520                 DLOG("Mapping dock client\n");
 521                 xcb_map_window(xcb_connection, client);
 522             } else {
 523                 DLOG("Not mapping dock client yet\n");
 524             }
 525             trayclient *tc = smalloc(sizeof(trayclient));
 526             tc->win = client;
 527             tc->mapped = map_it;
 528             tc->xe_version = xe_version;
 529             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 530
 531             /* Trigger an update to copy the statusline text to the appropriate
 532              * position */
 533             configure_trayclients();
 534             draw_bars();
 535         }
 536     }
 537 }
 538
 539 /*
 540  * Handles UnmapNotify events. These events happen when a tray window unmaps
 541  * itself. We then update our data structure
 542  *
 543  */
 544 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 545     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 546
 547     i3_output *walk;
 548     SLIST_FOREACH(walk, outputs, slist) {
 549         if (!walk->active)
 550             continue;
 551         DLOG("checking output %s\n", walk->name);
 552         trayclient *trayclient;
 553         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 554             if (trayclient->win != event->window)
 555                 continue;
 556
 557             DLOG("Removing tray client with window ID %08x\n", event->window);
 558             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 559
 560             /* Trigger an update, we now have more space for the statusline */
 561             configure_trayclients();
 562             draw_bars();
 563             return;
 564         }
 565     }
 566 }
 567
 568 /*
 569  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 570  * handled, which tells us whether a dock client should be mapped or unmapped.
 571  *
 572  */
 573 static void handle_property_notify(xcb_property_notify_event_t *event) {
 574     DLOG("PropertyNotify\n");
 575     if (event->atom == atoms[_XEMBED_INFO] &&
 576         event->state == XCB_PROPERTY_NEW_VALUE) {
 577         DLOG("xembed_info updated\n");
 578         trayclient *trayclient = NULL, *walk;
 579         i3_output *o_walk;
 580         SLIST_FOREACH(o_walk, outputs, slist) {
 581             if (!o_walk->active)
 582                 continue;
 583
 584             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 585                 if (walk->win != event->window)
 586                     continue;
 587                 trayclient = walk;
 588                 break;
 589             }
 590
 591             if (trayclient)
 592                 break;
 593         }
 594         if (!trayclient) {
 595             ELOG("PropertyNotify received for unknown window %08x\n",
 596                  event->window);
 597             return;
 598         }
 599         xcb_get_property_cookie_t xembedc;
 600         xembedc = xcb_get_property_unchecked(xcb_connection,
 601                                              0,
 602                                              trayclient->win,
 603                                              atoms[_XEMBED_INFO],
 604                                              XCB_GET_PROPERTY_TYPE_ANY,
 605                                              0,
 606                                              2 * 32);
 607
 608         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 609                                                                    xembedc,
 610                                                                    NULL);
 611         if (xembedr == NULL || xembedr->length == 0) {
 612             DLOG("xembed_info unset\n");
 613             return;
 614         }
 615
 616         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 617         uint32_t *xembed = xcb_get_property_value(xembedr);
 618         DLOG("xembed version = %d\n", xembed[0]);
 619         DLOG("xembed flags = %d\n", xembed[1]);
 620         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 621         DLOG("map-state now %d\n", map_it);
 622         if (trayclient->mapped && !map_it) {
 623             /* need to unmap the window */
 624             xcb_unmap_window(xcb_connection, trayclient->win);
 625             trayclient->mapped = map_it;
 626             configure_trayclients();
 627             draw_bars();
 628         } else if (!trayclient->mapped && map_it) {
 629             /* need to map the window */
 630             xcb_map_window(xcb_connection, trayclient->win);
 631             trayclient->mapped = map_it;
 632             configure_trayclients();
 633             draw_bars();
 634         }
 635         free(xembedr);
 636     }
 637 }
 638
 639 /*
 640  * Handle ConfigureRequests by denying them and sending the client a
 641  * ConfigureNotify with its actual size.
 642  *
 643  */
 644 static void handle_configure_request(xcb_configure_request_event_t *event) {
 645     DLOG("ConfigureRequest for window = %08x\n", event->window);
 646
 647     trayclient *trayclient;
 648     i3_output *output;
 649     SLIST_FOREACH(output, outputs, slist) {
 650         if (!output->active)
 651             continue;
 652
 653         int clients = 0;
 654         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 655             if (!trayclient->mapped)
 656                 continue;
 657             clients++;
 658
 659             if (trayclient->win != event->window)
 660                 continue;
 661
 662             xcb_rectangle_t rect;
 663             rect.x = output->rect.w - (clients * (font.height + 2));
 664             rect.y = 2;
 665             rect.width = font.height;
 666             rect.height = font.height;
 667
 668             DLOG("This is a tray window. x = %d\n", rect.x);
 669             fake_configure_notify(xcb_connection, rect, event->window, 0);
 670             return;
 671         }
 672     }
 673
 674     DLOG("WARNING: Could not find corresponding tray window.\n");
 675 }
 676
 677 /*
 678  * This function is called immediately before the main loop locks. We flush xcb
 679  * then (and only then)
 680  *
 681  */
 682 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 683     xcb_flush(xcb_connection);
 684 }
 685
 686 /*
 687  * This function is called immediately after the main loop locks, so when one
 688  * of the watchers registered an event.
 689  * We check whether an X-Event arrived and handle it.
 690  *
 691  */
 692 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 693     xcb_generic_event_t *event;
 694
 695     if (xcb_connection_has_error(xcb_connection)) {
 696         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 697         exit(1);
 698     }
 699
 700     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 701         switch (event->response_type & ~0x80) {
 702             case XCB_EXPOSE:
 703                 /* Expose-events happen, when the window needs to be redrawn */
 704                 redraw_bars();
 705                 break;
 706             case XCB_BUTTON_PRESS:
 707                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 708                 handle_button((xcb_button_press_event_t*) event);
 709                 break;
 710             case XCB_CLIENT_MESSAGE:
 711                 /* Client messages are used for client-to-client communication, for
 712                  * example system tray widgets talk to us directly via client messages. */
 713                 handle_client_message((xcb_client_message_event_t*) event);
 714                 break;
 715             case XCB_UNMAP_NOTIFY:
 716             case XCB_DESTROY_NOTIFY:
 717                 /* UnmapNotifies are received when a tray window unmaps itself */
 718                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 719                 break;
 720             case XCB_PROPERTY_NOTIFY:
 721                 /* PropertyNotify */
 722                 handle_property_notify((xcb_property_notify_event_t*) event);
 723                 break;
 724             case XCB_CONFIGURE_REQUEST:
 725                 /* ConfigureRequest, sent by a tray child */
 726                 handle_configure_request((xcb_configure_request_event_t*) event);
 727                 break;
 728         }
 729         free(event);
 730     }
 731 }
 732
 733 /*
 734  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 735  * are triggered
 736  *
 737  */
 738 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 739 }
 740
 741 /*
 742  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 743  *
 744  */
 745 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 746     XkbEvent ev;
 747     int modstate = 0;
 748
 749     DLOG("Got XKB-Event!\n");
 750
 751     while (XPending(xkb_dpy)) {
 752         XNextEvent(xkb_dpy, (XEvent*)&ev);
 753
 754         if (ev.type != xkb_event_base) {
 755             ELOG("No Xkb-Event!\n");
 756             continue;
 757         }
 758
 759         if (ev.any.xkb_type != XkbStateNotify) {
 760             ELOG("No State Notify!\n");
 761             continue;
 762         }
 763
 764         unsigned int mods = ev.state.mods;
 765         modstate = mods & config.modifier;
 766     }
 767
 768 #define DLOGMOD(modmask, status, barfunc) \
 769     do { \
 770         switch (modmask) { \
 771             case ShiftMask: \
 772                 DLOG("ShiftMask got " #status "!\n"); \
 773                 break; \
 774             case ControlMask: \
 775                 DLOG("ControlMask got " #status "!\n"); \
 776                 break; \
 777             case Mod1Mask: \
 778                 DLOG("Mod1Mask got " #status "!\n"); \
 779                 break; \
 780             case Mod2Mask: \
 781                 DLOG("Mod2Mask got " #status "!\n"); \
 782                 break; \
 783             case Mod3Mask: \
 784                 DLOG("Mod3Mask got " #status "!\n"); \
 785                 break; \
 786             case Mod4Mask: \
 787                 DLOG("Mod4Mask got " #status "!\n"); \
 788                 break; \
 789             case Mod5Mask: \
 790                 DLOG("Mod5Mask got " #status "!\n"); \
 791                 break; \
 792         } \
 793         barfunc(); \
 794     } while (0)
 795
 796     if (modstate != mod_pressed) {
 797         if (modstate == 0) {
 798             DLOGMOD(config.modifier, released, hide_bars);
 799         } else {
 800             DLOGMOD(config.modifier, pressed, unhide_bars);
 801         }
 802         mod_pressed = modstate;
 803     }
 804
 805 #undef DLOGMOD
 806 }
 807
 808 /*
 809  * Early initialization of the connection to X11: Everything which does not
 810  * depend on 'config'.
 811  *
 812  */
 813 char *init_xcb_early() {
 814     /* FIXME: xcb_connect leaks Memory */
 815     xcb_connection = xcb_connect(NULL, &screen);
 816     if (xcb_connection_has_error(xcb_connection)) {
 817         ELOG("Cannot open display\n");
 818         exit(EXIT_FAILURE);
 819     }
 820     conn = xcb_connection;
 821     DLOG("Connected to xcb\n");
 822
 823     /* We have to request the atoms we need */
 824     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 825     #include "xcb_atoms.def"
 826
 827     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 828     xcb_root = root_screen->root;
 829
 830     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 831      * this way, we can choose to crop it */
 832     uint32_t mask = XCB_GC_FOREGROUND;
 833     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 834
 835     statusline_clear = xcb_generate_id(xcb_connection);
 836     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 837                                                                statusline_clear,
 838                                                                xcb_root,
 839                                                                mask,
 840                                                                vals);
 841
 842     statusline_ctx = xcb_generate_id(xcb_connection);
 843     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 844                                                             statusline_ctx,
 845                                                             xcb_root,
 846                                                             0,
 847                                                             NULL);
 848
 849     statusline_pm = xcb_generate_id(xcb_connection);
 850     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 851                                                                root_screen->root_depth,
 852                                                                statusline_pm,
 853                                                                xcb_root,
 854                                                                root_screen->width_in_pixels,
 855                                                                root_screen->height_in_pixels);
 856
 857
 858     /* The various Watchers to communicate with xcb */
 859     xcb_io = smalloc(sizeof(ev_io));
 860     xcb_prep = smalloc(sizeof(ev_prepare));
 861     xcb_chk = smalloc(sizeof(ev_check));
 862
 863     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 864     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 865     ev_check_init(xcb_chk, &xcb_chk_cb);
 866
 867     ev_io_start(main_loop, xcb_io);
 868     ev_prepare_start(main_loop, xcb_prep);
 869     ev_check_start(main_loop, xcb_chk);
 870
 871     /* Now we get the atoms and save them in a nice data structure */
 872     get_atoms();
 873
 874     xcb_get_property_cookie_t path_cookie;
 875     path_cookie = xcb_get_property_unchecked(xcb_connection,
 876                                    0,
 877                                    xcb_root,
 878                                    atoms[I3_SOCKET_PATH],
 879                                    XCB_GET_PROPERTY_TYPE_ANY,
 880                                    0, PATH_MAX);
 881
 882     /* We check, if i3 set its socket-path */
 883     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 884                                                                   path_cookie,
 885                                                                   NULL);
 886     char *path = NULL;
 887     if (path_reply) {
 888         int len = xcb_get_property_value_length(path_reply);
 889         if (len != 0) {
 890             path = strndup(xcb_get_property_value(path_reply), len);
 891         }
 892     }
 893
 894
 895     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 896         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 897         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 898         exit(EXIT_FAILURE);
 899     }
 900
 901     return path;
 902 }
 903
 904 /*
 905  * Initialization which depends on 'config' being usable. Called after the
 906  * configuration has arrived.
 907  *
 908  */
 909 void init_xcb_late(char *fontname) {
 910     if (fontname == NULL)
 911         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 912
 913     /* Load the font */
 914     font = load_font(fontname, true);
 915     set_font(&font);
 916     DLOG("Calculated Font-height: %d\n", font.height);
 917
 918     xcb_flush(xcb_connection);
 919
 920     /* To grab modifiers without blocking other applications from receiving key-events
 921      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 922      * in xcb */
 923     if (config.hide_on_modifier) {
 924         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 925         xkb_major = XkbMajorVersion;
 926         xkb_minor = XkbMinorVersion;
 927
 928         xkb_dpy = XkbOpenDisplay(NULL,
 929                                  &xkb_event_base,
 930                                  &xkb_errbase,
 931                                  &xkb_major,
 932                                  &xkb_minor,
 933                                  &xkb_err);
 934
 935         if (xkb_dpy == NULL) {
 936             ELOG("No XKB!\n");
 937             exit(EXIT_FAILURE);
 938         }
 939
 940         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 941             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 942             exit(EXIT_FAILURE);
 943         }
 944
 945         int i1;
 946         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 947             ELOG("XKB not supported by X-server!\n");
 948             exit(EXIT_FAILURE);
 949         }
 950
 951         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 952             ELOG("Could not grab Key!\n");
 953             exit(EXIT_FAILURE);
 954         }
 955
 956         xkb_io = smalloc(sizeof(ev_io));
 957         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 958         ev_io_start(main_loop, xkb_io);
 959         XFlush(xkb_dpy);
 960     }
 961 }
 962
 963 /*
 964  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 965  * for the X11 display we are running on, then acquiring the selection for this
 966  * atom. Afterwards, tray clients will send ClientMessages to our window.
 967  *
 968  */
 969 void init_tray(void) {
 970     DLOG("Initializing system tray functionality\n");
 971     /* request the tray manager atom for the X11 display we are running on */
 972     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 973     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 974     xcb_intern_atom_cookie_t tray_cookie;
 975     xcb_intern_atom_reply_t *tray_reply;
 976     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 977
 978     /* tray support: we need a window to own the selection */
 979     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 980     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 981     uint32_t selval[] = { 1 };
 982     xcb_create_window(xcb_connection,
 983                       root_screen->root_depth,
 984                       selwin,
 985                       xcb_root,
 986                       -1, -1,
 987                       1, 1,
 988                       1,
 989                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 990                       root_screen->root_visual,
 991                       selmask,
 992                       selval);
 993
 994     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 995     /* set the atoms */
 996     xcb_change_property(xcb_connection,
 997                         XCB_PROP_MODE_REPLACE,
 998                         selwin,
 999                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1000                         XCB_ATOM_CARDINAL,
1001                         32,
1002                         1,
1003                         &orientation);
1004
1005     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1006         ELOG("Could not get atom %s\n", atomname);
1007         exit(EXIT_FAILURE);
1008     }
1009
1010     xcb_set_selection_owner(xcb_connection,
1011                             selwin,
1012                             tray_reply->atom,
1013                             XCB_CURRENT_TIME);
1014
1015     /* Verify that we have the selection */
1016     xcb_get_selection_owner_cookie_t selcookie;
1017     xcb_get_selection_owner_reply_t *selreply;
1018
1019     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1020     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1021         ELOG("Could not get selection owner for %s\n", atomname);
1022         exit(EXIT_FAILURE);
1023     }
1024
1025     if (selreply->owner != selwin) {
1026         ELOG("Could not set the %s selection. " \
1027              "Maybe another tray is already running?\n", atomname);
1028         /* NOTE that this error is not fatal. We just can’t provide tray
1029          * functionality */
1030         free(selreply);
1031         return;
1032     }
1033
1034     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
1035     void *event = scalloc(32);
1036     xcb_client_message_event_t *ev = event;
1037     ev->response_type = XCB_CLIENT_MESSAGE;
1038     ev->window = xcb_root;
1039     ev->type = atoms[MANAGER];
1040     ev->format = 32;
1041     ev->data.data32[0] = XCB_CURRENT_TIME;
1042     ev->data.data32[1] = tray_reply->atom;
1043     ev->data.data32[2] = selwin;
1044     xcb_send_event(xcb_connection,
1045                    0,
1046                    xcb_root,
1047                    0xFFFFFF,
1048                    (char*)ev);
1049     free(event);
1050     free(tray_reply);
1051 }
1052
1053 /*
1054  * Cleanup the xcb-stuff.
1055  * Called once, before the program terminates.
1056  *
1057  */
1058 void clean_xcb(void) {
1059     i3_output *o_walk;
1060     free_workspaces();
1061     SLIST_FOREACH(o_walk, outputs, slist) {
1062         destroy_window(o_walk);
1063         FREE(o_walk->trayclients);
1064         FREE(o_walk->workspaces);
1065         FREE(o_walk->name);
1066     }
1067     FREE_SLIST(outputs, i3_output);
1068     FREE(outputs);
1069
1070     xcb_flush(xcb_connection);
1071     xcb_disconnect(xcb_connection);
1072
1073     ev_check_stop(main_loop, xcb_chk);
1074     ev_prepare_stop(main_loop, xcb_prep);
1075     ev_io_stop(main_loop, xcb_io);
1076
1077     FREE(xcb_chk);
1078     FREE(xcb_prep);
1079     FREE(xcb_io);
1080 }
1081
1082 /*
1083  * Get the earlier requested atoms and save them in the prepared data structure
1084  *
1085  */
1086 void get_atoms(void) {
1087     xcb_intern_atom_reply_t *reply;
1088     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1089         if (reply == NULL) { \
1090             ELOG("Could not get atom %s\n", #name); \
1091             exit(EXIT_FAILURE); \
1092         } \
1093         atoms[name] = reply->atom; \
1094         free(reply);
1095
1096     #include "xcb_atoms.def"
1097     DLOG("Got Atoms\n");
1098 }
1099
1100 /*
1101  * Reparents all tray clients of the specified output to the root window. This
1102  * is either used when shutting down, when an output appears (xrandr --output
1103  * VGA1 --off) or when the primary output changes.
1104  *
1105  * Applications using the tray will start the protocol from the beginning again
1106  * afterwards.
1107  *
1108  */
1109 void kick_tray_clients(i3_output *output) {
1110     trayclient *trayclient;
1111     while (!TAILQ_EMPTY(output->trayclients)) {
1112         trayclient = TAILQ_FIRST(output->trayclients);
1113         /* Unmap, then reparent (to root) the tray client windows */
1114         xcb_unmap_window(xcb_connection, trayclient->win);
1115         xcb_reparent_window(xcb_connection,
1116                             trayclient->win,
1117                             xcb_root,
1118                             0,
1119                             0);
1120
1121         /* We remove the trayclient right here. We might receive an UnmapNotify
1122          * event afterwards, but better safe than sorry. */
1123         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1124     }
1125 }
1126
1127 /*
1128  * Destroy the bar of the specified output
1129  *
1130  */
1131 void destroy_window(i3_output *output) {
1132     if (output == NULL) {
1133         return;
1134     }
1135     if (output->bar == XCB_NONE) {
1136         return;
1137     }
1138
1139     kick_tray_clients(output);
1140     xcb_destroy_window(xcb_connection, output->bar);
1141     output->bar = XCB_NONE;
1142 }
1143
1144 /*
1145  * Reallocate the statusline-buffer
1146  *
1147  */
1148 void realloc_sl_buffer(void) {
1149     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1150          statusline_width, root_screen->width_in_pixels);
1151     xcb_free_pixmap(xcb_connection, statusline_pm);
1152     statusline_pm = xcb_generate_id(xcb_connection);
1153     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1154                                                                root_screen->root_depth,
1155                                                                statusline_pm,
1156                                                                xcb_root,
1157                                                                MAX(root_screen->width_in_pixels, statusline_width),
1158                                                                root_screen->height_in_pixels);
1159
1160     uint32_t mask = XCB_GC_FOREGROUND;
1161     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1162     xcb_free_gc(xcb_connection, statusline_clear);
1163     statusline_clear = xcb_generate_id(xcb_connection);
1164     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1165                                                                statusline_clear,
1166                                                                xcb_root,
1167                                                                mask,
1168                                                                vals);
1169
1170     mask |= XCB_GC_BACKGROUND;
1171     vals[0] = colors.bar_fg;
1172     statusline_ctx = xcb_generate_id(xcb_connection);
1173     xcb_free_gc(xcb_connection, statusline_ctx);
1174     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1175                                                             statusline_ctx,
1176                                                             xcb_root,
1177                                                             mask,
1178                                                             vals);
1179
1180     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1181         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1182         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1183         exit(EXIT_FAILURE);
1184     }
1185
1186 }
1187
1188 /*
1189  * Reconfigure all bars and create new bars for recently activated outputs
1190  *
1191  */
1192 void reconfig_windows(void) {
1193     uint32_t mask;
1194     uint32_t values[5];
1195     static bool tray_configured = false;
1196
1197     i3_output *walk;
1198     SLIST_FOREACH(walk, outputs, slist) {
1199         if (!walk->active) {
1200             /* If an output is not active, we destroy its bar */
1201             /* FIXME: Maybe we rather want to unmap? */
1202             DLOG("Destroying window for output %s\n", walk->name);
1203             destroy_window(walk);
1204             continue;
1205         }
1206         if (walk->bar == XCB_NONE) {
1207             DLOG("Creating Window for output %s\n", walk->name);
1208
1209             walk->bar = xcb_generate_id(xcb_connection);
1210             walk->buffer = xcb_generate_id(xcb_connection);
1211             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1212             /* Black background */
1213             values[0] = colors.bar_bg;
1214             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1215             values[1] = config.hide_on_modifier;
1216             /* We enable the following EventMask fields:
1217              * EXPOSURE, to get expose events (we have to re-draw then)
1218              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1219              *                        child windows use ConfigureWindow
1220              * BUTTON_PRESS, to handle clicks on the workspace buttons
1221              * */
1222             values[2] = XCB_EVENT_MASK_EXPOSURE |
1223                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1224             if (!config.disable_ws) {
1225                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1226             }
1227             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1228                                                                      root_screen->root_depth,
1229                                                                      walk->bar,
1230                                                                      xcb_root,
1231                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
1232                                                                      walk->rect.w, font.height + 6,
1233                                                                      1,
1234                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1235                                                                      root_screen->root_visual,
1236                                                                      mask,
1237                                                                      values);
1238
1239             /* The double-buffer we use to render stuff off-screen */
1240             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1241                                                                     root_screen->root_depth,
1242                                                                     walk->buffer,
1243                                                                     walk->bar,
1244                                                                     walk->rect.w,
1245                                                                     walk->rect.h);
1246
1247             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1248             xcb_void_cookie_t class_cookie;
1249             class_cookie = xcb_change_property(xcb_connection,
1250                                                XCB_PROP_MODE_REPLACE,
1251                                                walk->bar,
1252                                                XCB_ATOM_WM_CLASS,
1253                                                XCB_ATOM_STRING,
1254                                                8,
1255                                                (strlen("i3bar") + 1) * 2,
1256                                                "i3bar\0i3bar\0");
1257
1258             char *name;
1259             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1260                 err(EXIT_FAILURE, "asprintf()");
1261             xcb_void_cookie_t name_cookie;
1262             name_cookie = xcb_change_property(xcb_connection,
1263                                               XCB_PROP_MODE_REPLACE,
1264                                               walk->bar,
1265                                               XCB_ATOM_WM_NAME,
1266                                               XCB_ATOM_STRING,
1267                                               8,
1268                                               strlen(name),
1269                                               name);
1270             free(name);
1271
1272             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1273              * this one */
1274             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1275                                                                 XCB_PROP_MODE_REPLACE,
1276                                                                 walk->bar,
1277                                                                 atoms[_NET_WM_WINDOW_TYPE],
1278                                                                 XCB_ATOM_ATOM,
1279                                                                 32,
1280                                                                 1,
1281                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1282
1283             /* We need to tell i3, where to reserve space for i3bar */
1284             /* left, right, top, bottom, left_start_y, left_end_y,
1285              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1286              * bottom_end_x */
1287             /* A local struct to save the strut_partial property */
1288             struct {
1289                 uint32_t left;
1290                 uint32_t right;
1291                 uint32_t top;
1292                 uint32_t bottom;
1293                 uint32_t left_start_y;
1294                 uint32_t left_end_y;
1295                 uint32_t right_start_y;
1296                 uint32_t right_end_y;
1297                 uint32_t top_start_x;
1298                 uint32_t top_end_x;
1299                 uint32_t bottom_start_x;
1300                 uint32_t bottom_end_x;
1301             } __attribute__((__packed__)) strut_partial = {0,};
1302             switch (config.position) {
1303                 case POS_NONE:
1304                     break;
1305                 case POS_TOP:
1306                     strut_partial.top = font.height + 6;
1307                     strut_partial.top_start_x = walk->rect.x;
1308                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1309                     break;
1310                 case POS_BOT:
1311                     strut_partial.bottom = font.height + 6;
1312                     strut_partial.bottom_start_x = walk->rect.x;
1313                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1314                     break;
1315             }
1316             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1317                                                                  XCB_PROP_MODE_REPLACE,
1318                                                                  walk->bar,
1319                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1320                                                                  XCB_ATOM_CARDINAL,
1321                                                                  32,
1322                                                                  12,
1323                                                                  &strut_partial);
1324
1325             /* We also want a graphics-context for the bars (it defines the properties
1326              * with which we draw to them) */
1327             walk->bargc = xcb_generate_id(xcb_connection);
1328             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1329                                                                 walk->bargc,
1330                                                                 walk->bar,
1331                                                                 0,
1332                                                                 NULL);
1333
1334             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1335             xcb_void_cookie_t map_cookie;
1336             if (!config.hide_on_modifier) {
1337                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1338             }
1339
1340             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1341                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1342                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1343                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1344                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1345                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1346                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1347                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1348                 exit(EXIT_FAILURE);
1349             }
1350
1351             if (!tray_configured &&
1352                 (!config.tray_output ||
1353                  strcasecmp("none", config.tray_output) != 0)) {
1354                 init_tray();
1355                 tray_configured = true;
1356             }
1357         } else {
1358             /* We already have a bar, so we just reconfigure it */
1359             mask = XCB_CONFIG_WINDOW_X |
1360                    XCB_CONFIG_WINDOW_Y |
1361                    XCB_CONFIG_WINDOW_WIDTH |
1362                    XCB_CONFIG_WINDOW_HEIGHT |
1363                    XCB_CONFIG_WINDOW_STACK_MODE;
1364             values[0] = walk->rect.x;
1365             values[1] = walk->rect.y + walk->rect.h - font.height - 6;
1366             values[2] = walk->rect.w;
1367             values[3] = font.height + 6;
1368             values[4] = XCB_STACK_MODE_ABOVE;
1369
1370             DLOG("Destroying buffer for output %s", walk->name);
1371             xcb_free_pixmap(xcb_connection, walk->buffer);
1372
1373             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1374             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1375                                                                         walk->bar,
1376                                                                         mask,
1377                                                                         values);
1378
1379             DLOG("Recreating buffer for output %s", walk->name);
1380             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1381                                                                     root_screen->root_depth,
1382                                                                     walk->buffer,
1383                                                                     walk->bar,
1384                                                                     walk->rect.w,
1385                                                                     walk->rect.h);
1386
1387             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1388                 exit(EXIT_FAILURE);
1389             }
1390             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1391                 exit(EXIT_FAILURE);
1392             }
1393         }
1394     }
1395 }
1396
1397 /*
1398  * Render the bars, with buttons and statusline
1399  *
1400  */
1401 void draw_bars(void) {
1402     DLOG("Drawing Bars...\n");
1403     int i = 0;
1404
1405     refresh_statusline();
1406
1407     static char *last_urgent_ws = NULL;
1408     bool unhide = false;
1409     bool walks_away = true;
1410
1411     i3_output *outputs_walk;
1412     SLIST_FOREACH(outputs_walk, outputs, slist) {
1413         if (!outputs_walk->active) {
1414             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1415             continue;
1416         }
1417         if (outputs_walk->bar == XCB_NONE) {
1418             /* Oh shit, an active output without an own bar. Create it now! */
1419             reconfig_windows();
1420         }
1421         /* First things first: clear the backbuffer */
1422         uint32_t color = colors.bar_bg;
1423         xcb_change_gc(xcb_connection,
1424                       outputs_walk->bargc,
1425                       XCB_GC_FOREGROUND,
1426                       &color);
1427         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
1428         xcb_poly_fill_rectangle(xcb_connection,
1429                                 outputs_walk->buffer,
1430                                 outputs_walk->bargc,
1431                                 1,
1432                                 &rect);
1433
1434         if (!TAILQ_EMPTY(&statusline_head)) {
1435             DLOG("Printing statusline!\n");
1436
1437             /* Luckily we already prepared a seperate pixmap containing the rendered
1438              * statusline, we just have to copy the relevant parts to the relevant
1439              * position */
1440             trayclient *trayclient;
1441             int traypx = 0;
1442             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1443                 if (!trayclient->mapped)
1444                     continue;
1445                 /* We assume the tray icons are quadratic (we use the font
1446                  * *height* as *width* of the icons) because we configured them
1447                  * like this. */
1448                 traypx += font.height + 2;
1449             }
1450             /* Add 2px of padding if there are any tray icons */
1451             if (traypx > 0)
1452                 traypx += 2;
1453             xcb_copy_area(xcb_connection,
1454                           statusline_pm,
1455                           outputs_walk->buffer,
1456                           outputs_walk->bargc,
1457                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1458                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1459                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
1460         }
1461
1462         if (config.disable_ws) {
1463             continue;
1464         }
1465
1466         i3_ws *ws_walk;
1467
1468         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1469             DLOG("Drawing Button for WS %s at x = %d, len = %d\n", i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1470             uint32_t fg_color = colors.inactive_ws_fg;
1471             uint32_t bg_color = colors.inactive_ws_bg;
1472             uint32_t border_color = colors.inactive_ws_border;
1473             if (ws_walk->visible) {
1474                 if (!ws_walk->focused) {
1475                     fg_color = colors.active_ws_fg;
1476                     bg_color = colors.active_ws_bg;
1477                     border_color = colors.active_ws_border;
1478                 } else {
1479                     fg_color = colors.focus_ws_fg;
1480                     bg_color = colors.focus_ws_bg;
1481                     border_color = colors.focus_ws_border;
1482                     if (last_urgent_ws && strcmp(i3string_as_utf8(ws_walk->name), last_urgent_ws) == 0)
1483                         walks_away = false;
1484                 }
1485             }
1486             if (ws_walk->urgent) {
1487                 DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1488                 fg_color = colors.urgent_ws_fg;
1489                 bg_color = colors.urgent_ws_bg;
1490                 border_color = colors.urgent_ws_border;
1491                 unhide = true;
1492                 if (!ws_walk->focused) {
1493                     FREE(last_urgent_ws);
1494                     last_urgent_ws = sstrdup(i3string_as_utf8(ws_walk->name));
1495                 }
1496             }
1497             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1498             uint32_t vals_border[] = { border_color, border_color };
1499             xcb_change_gc(xcb_connection,
1500                           outputs_walk->bargc,
1501                           mask,
1502                           vals_border);
1503             xcb_rectangle_t rect_border = { i, 0, ws_walk->name_width + 10, font.height + 4 };
1504             xcb_poly_fill_rectangle(xcb_connection,
1505                                     outputs_walk->buffer,
1506                                     outputs_walk->bargc,
1507                                     1,
1508                                     &rect_border);
1509             uint32_t vals[] = { bg_color, bg_color };
1510             xcb_change_gc(xcb_connection,
1511                           outputs_walk->bargc,
1512                           mask,
1513                           vals);
1514             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 2 };
1515             xcb_poly_fill_rectangle(xcb_connection,
1516                                     outputs_walk->buffer,
1517                                     outputs_walk->bargc,
1518                                     1,
1519                                     &rect);
1520             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1521             draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 2, ws_walk->name_width);
1522             i += 10 + ws_walk->name_width + 1;
1523         }
1524
1525         i = 0;
1526     }
1527
1528     if (!mod_pressed) {
1529         if (unhide) {
1530             /* The urgent-hint should get noticed, so we unhide the bars shortly */
1531             unhide_bars();
1532         } else if (walks_away) {
1533             FREE(last_urgent_ws);
1534             hide_bars();
1535         }
1536     }
1537
1538     redraw_bars();
1539 }
1540
1541 /*
1542  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1543  *
1544  */
1545 void redraw_bars(void) {
1546     i3_output *outputs_walk;
1547     SLIST_FOREACH(outputs_walk, outputs, slist) {
1548         if (!outputs_walk->active) {
1549             continue;
1550         }
1551         xcb_copy_area(xcb_connection,
1552                       outputs_walk->buffer,
1553                       outputs_walk->bar,
1554                       outputs_walk->bargc,
1555                       0, 0,
1556                       0, 0,
1557                       outputs_walk->rect.w,
1558                       outputs_walk->rect.h);
1559         xcb_flush(xcb_connection);
1560     }
1561 }