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   1 /*
   2  * i3bar - an xcb-based status- and ws-bar for i3
   3  *
   4  * © 2010-2011 Axel Wagner and contributors
   5  *
   6  * See file LICNSE for license information
   7  *
   8  * src/xcb.c: Communicating with X
   9  *
  10  */
  11 #include <xcb/xcb.h>
  12 #include <xcb/xproto.h>
  13 #include <xcb/xcb_atom.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <string.h>
  19 #include <i3/ipc.h>
  20 #include <ev.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23
  24 #include <X11/Xlib.h>
  25 #include <X11/XKBlib.h>
  26 #include <X11/extensions/XKB.h>
  27
  28 #include "common.h"
  29
  30 #if defined(__APPLE__)
  31
  32 /*
  33  * Taken from FreeBSD
  34  * Returns a pointer to a new string which is a duplicate of the
  35  * string, but only copies at most n characters.
  36  *
  37  */
  38 char *strndup(const char *str, size_t n) {
  39     size_t len;
  40     char *copy;
  41
  42     for (len = 0; len < n && str[len]; len++)
  43         continue;
  44
  45     if ((copy = malloc(len + 1)) == NULL)
  46         return (NULL);
  47     memcpy(copy, str, len);
  48     copy[len] = '\0';
  49     return (copy);
  50 }
  51
  52 #endif
  53
  54 /* We save the Atoms in an easy to access array, indexed by an enum */
  55 enum {
  56     #define ATOM_DO(name) name,
  57     #include "xcb_atoms.def"
  58     NUM_ATOMS
  59 };
  60
  61 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  62 xcb_atom_t               atoms[NUM_ATOMS];
  63
  64 /* Variables, that are the same for all functions at all times */
  65 xcb_connection_t *xcb_connection;
  66 int              screen;
  67 xcb_screen_t     *xcb_screen;
  68 xcb_window_t     xcb_root;
  69 xcb_font_t       xcb_font;
  70
  71 /* We need to cache some data to speed up text-width-prediction */
  72 xcb_query_font_reply_t *font_info;
  73 int                    font_height;
  74 xcb_charinfo_t         *font_table;
  75
  76 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  77 Display          *xkb_dpy;
  78 int              xkb_event_base;
  79 int              mod_pressed = 0;
  80
  81 /* Because the statusline is the same on all outputs, we have
  82  * global buffer to render it on */
  83 xcb_gcontext_t   statusline_ctx;
  84 xcb_gcontext_t   statusline_clear;
  85 xcb_pixmap_t     statusline_pm;
  86 uint32_t         statusline_width;
  87
  88 /* Event-Watchers, to interact with the user */
  89 ev_prepare *xcb_prep;
  90 ev_check   *xcb_chk;
  91 ev_io      *xcb_io;
  92 ev_io      *xkb_io;
  93
  94 /* The parsed colors */
  95 struct xcb_colors_t {
  96     uint32_t bar_fg;
  97     uint32_t bar_bg;
  98     uint32_t active_ws_fg;
  99     uint32_t active_ws_bg;
 100     uint32_t inactive_ws_fg;
 101     uint32_t inactive_ws_bg;
 102     uint32_t urgent_ws_bg;
 103     uint32_t urgent_ws_fg;
 104     uint32_t focus_ws_bg;
 105     uint32_t focus_ws_fg;
 106 };
 107 struct xcb_colors_t colors;
 108
 109 /* We define xcb_request_failed as a macro to include the relevant line-number */
 110 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 111 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 112     xcb_generic_error_t *err;
 113     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 114         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 115         return err->error_code;
 116     }
 117     return 0;
 118 }
 119
 120 /*
 121  * Predicts the length of text based on cached data.
 122  * The string has to be encoded in ucs2 and glyph_len has to be the length
 123  * of the string (in glyphs).
 124  *
 125  */
 126 uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
 127     /* If we don't have per-character data, return the maximum width */
 128     if (font_table == NULL) {
 129         return (font_info->max_bounds.character_width * length);
 130     }
 131
 132     uint32_t width = 0;
 133     uint32_t i;
 134
 135     for (i = 0; i < length; i++) {
 136         xcb_charinfo_t *info;
 137         int row = text[i].byte1;
 138         int col = text[i].byte2;
 139
 140         if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
 141             col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2) {
 142             continue;
 143         }
 144
 145         /* Don't you ask me, how this one works… */
 146         info = &font_table[((row - font_info->min_byte1) *
 147                             (font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
 148                            (col - font_info->min_char_or_byte2)];
 149
 150         if (info->character_width != 0 ||
 151             (info->right_side_bearing |
 152              info->left_side_bearing |
 153              info->ascent |
 154              info->descent) != 0) {
 155             width += info->character_width;
 156         }
 157     }
 158
 159     return width;
 160 }
 161
 162 /*
 163  * Draws text given in UCS-2-encoding to a given drawable and position
 164  *
 165  */
 166 void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
 167                xcb_char2b_t *text, uint32_t glyph_count) {
 168     int offset = 0;
 169     int16_t pos_x = x;
 170     int16_t font_ascent = font_info->font_ascent;
 171
 172     while (glyph_count > 0) {
 173         uint8_t chunk_size = MIN(255, glyph_count);
 174         uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
 175
 176         xcb_image_text_16(xcb_connection,
 177                           chunk_size,
 178                           drawable,
 179                           ctx,
 180                           pos_x, y + font_ascent,
 181                           text + offset);
 182
 183         offset += chunk_size;
 184         pos_x += chunk_width;
 185         glyph_count -= chunk_size;
 186     }
 187 }
 188
 189 /*
 190  * Converts a colorstring to a colorpixel as expected from xcb_change_gc.
 191  * s is assumed to be in the format "rrggbb"
 192  *
 193  */
 194 uint32_t get_colorpixel(const char *s) {
 195     char strings[3][3] = { { s[0], s[1], '\0'} ,
 196                            { s[2], s[3], '\0'} ,
 197                            { s[4], s[5], '\0'} };
 198     uint8_t r = strtol(strings[0], NULL, 16);
 199     uint8_t g = strtol(strings[1], NULL, 16);
 200     uint8_t b = strtol(strings[2], NULL, 16);
 201     return (r << 16 | g << 8 | b);
 202 }
 203
 204 /*
 205  * Redraws the statusline to the buffer
 206  *
 207  */
 208 void refresh_statusline() {
 209     int glyph_count;
 210
 211     if (statusline == NULL) {
 212         return;
 213     }
 214
 215     xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
 216     statusline_width = predict_text_extents(text, glyph_count);
 217
 218     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
 219     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 220     draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
 221
 222     FREE(text);
 223 }
 224
 225 /*
 226  * Hides all bars (unmaps them)
 227  *
 228  */
 229 void hide_bars() {
 230     if (!config.hide_on_modifier) {
 231         return;
 232     }
 233
 234     i3_output *walk;
 235     SLIST_FOREACH(walk, outputs, slist) {
 236         if (!walk->active) {
 237             continue;
 238         }
 239         xcb_unmap_window(xcb_connection, walk->bar);
 240     }
 241     stop_child();
 242 }
 243
 244 /*
 245  * Unhides all bars (maps them)
 246  *
 247  */
 248 void unhide_bars() {
 249     if (!config.hide_on_modifier) {
 250         return;
 251     }
 252
 253     i3_output           *walk;
 254     xcb_void_cookie_t   cookie;
 255     uint32_t            mask;
 256     uint32_t            values[5];
 257
 258     cont_child();
 259
 260     SLIST_FOREACH(walk, outputs, slist) {
 261         if (walk->bar == XCB_NONE) {
 262             continue;
 263         }
 264         mask = XCB_CONFIG_WINDOW_X |
 265                XCB_CONFIG_WINDOW_Y |
 266                XCB_CONFIG_WINDOW_WIDTH |
 267                XCB_CONFIG_WINDOW_HEIGHT |
 268                XCB_CONFIG_WINDOW_STACK_MODE;
 269         values[0] = walk->rect.x;
 270         values[1] = walk->rect.y + walk->rect.h - font_height - 6;
 271         values[2] = walk->rect.w;
 272         values[3] = font_height + 6;
 273         values[4] = XCB_STACK_MODE_ABOVE;
 274         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 275         cookie = xcb_configure_window_checked(xcb_connection,
 276                                               walk->bar,
 277                                               mask,
 278                                               values);
 279
 280         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 281             exit(EXIT_FAILURE);
 282         }
 283         xcb_map_window(xcb_connection, walk->bar);
 284     }
 285 }
 286
 287 /*
 288  * Parse the colors into a format that we can use
 289  *
 290  */
 291 void init_colors(const struct xcb_color_strings_t *new_colors) {
 292 #define PARSE_COLOR(name, def) \
 293     do { \
 294         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 295     } while  (0)
 296     PARSE_COLOR(bar_fg, "FFFFFF");
 297     PARSE_COLOR(bar_bg, "000000");
 298     PARSE_COLOR(active_ws_fg, "FFFFFF");
 299     PARSE_COLOR(active_ws_bg, "480000");
 300     PARSE_COLOR(inactive_ws_fg, "FFFFFF");
 301     PARSE_COLOR(inactive_ws_bg, "240000");
 302     PARSE_COLOR(urgent_ws_fg, "FFFFFF");
 303     PARSE_COLOR(urgent_ws_bg, "002400");
 304     PARSE_COLOR(focus_ws_fg, "FFFFFF");
 305     PARSE_COLOR(focus_ws_bg, "480000");
 306 #undef PARSE_COLOR
 307 }
 308
 309 /*
 310  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 311  * We determine, whether the click occured on a ws-button or if the scroll-
 312  * wheel was used and change the workspace appropriately
 313  *
 314  */
 315 void handle_button(xcb_button_press_event_t *event) {
 316     i3_ws *cur_ws;
 317
 318     /* Determine, which bar was clicked */
 319     i3_output *walk;
 320     xcb_window_t bar = event->event;
 321     SLIST_FOREACH(walk, outputs, slist) {
 322         if (walk->bar == bar) {
 323             break;
 324         }
 325     }
 326
 327     if (walk == NULL) {
 328         DLOG("Unknown Bar klicked!\n");
 329         return;
 330     }
 331
 332     /* TODO: Move this to extern get_ws_for_output() */
 333     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 334         if (cur_ws->visible) {
 335             break;
 336         }
 337     }
 338
 339     if (cur_ws == NULL) {
 340         DLOG("No Workspace active?\n");
 341         return;
 342     }
 343
 344     int32_t x = event->event_x;
 345
 346     DLOG("Got Button %d\n", event->detail);
 347
 348     switch (event->detail) {
 349         case 1:
 350             /* Left Mousbutton. We determine, which button was clicked
 351              * and set cur_ws accordingly */
 352             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 353                 DLOG("x = %d\n", x);
 354                 if (x < cur_ws->name_width + 10) {
 355                     break;
 356                 }
 357                 x -= cur_ws->name_width + 10;
 358             }
 359             if (cur_ws == NULL) {
 360                 return;
 361             }
 362             break;
 363         case 4:
 364             /* Mouse wheel down. We select the next ws */
 365             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 366                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 367             } else {
 368                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 369             }
 370             break;
 371         case 5:
 372             /* Mouse wheel up. We select the previos ws */
 373             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 374                 cur_ws = TAILQ_FIRST(walk->workspaces);
 375             } else {
 376                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 377             }
 378             break;
 379     }
 380
 381     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 382     char buffer[len];
 383     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 384     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 385 }
 386
 387 /*
 388  * Configures the x coordinate of all trayclients. To be called after adding a
 389  * new tray client or removing an old one.
 390  *
 391  */
 392 static void configure_trayclients() {
 393     trayclient *trayclient;
 394     i3_output *output;
 395     SLIST_FOREACH(output, outputs, slist) {
 396         if (!output->active)
 397             continue;
 398
 399         int clients = 0;
 400         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 401             clients++;
 402
 403             DLOG("Configuring tray window %08x to x=%d\n",
 404                  trayclient->win, output->rect.w - (clients * (font_height + 2)));
 405             uint32_t x = output->rect.w - (clients * (font_height + 2));
 406             xcb_configure_window(xcb_connection,
 407                                  trayclient->win,
 408                                  XCB_CONFIG_WINDOW_X,
 409                                  &x);
 410         }
 411     }
 412 }
 413
 414 /*
 415  * Handles ClientMessages (messages sent from another client directly to us).
 416  *
 417  * At the moment, only the tray window will receive client messages. All
 418  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 419  *
 420  */
 421 static void handle_client_message(xcb_client_message_event_t* event) {
 422     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 423         event->format == 32) {
 424         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 425         /* event->data.data32[0] is the timestamp */
 426         uint32_t op = event->data.data32[1];
 427         uint32_t mask;
 428         uint32_t values[2];
 429         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 430             xcb_window_t client = event->data.data32[2];
 431
 432             /* Listen for PropertyNotify events to get the most recent value of
 433              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 434             mask = XCB_CW_EVENT_MASK;
 435             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 436                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 437             xcb_change_window_attributes(xcb_connection,
 438                                          client,
 439                                          mask,
 440                                          values);
 441
 442             /* Request the _XEMBED_INFO property. The XEMBED specification
 443              * (which is referred by the tray specification) says this *has* to
 444              * be set, but VLC does not set it… */
 445             bool map_it = true;
 446             int xe_version = 1;
 447             xcb_get_property_cookie_t xembedc;
 448             xembedc = xcb_get_property_unchecked(xcb_connection,
 449                                                  0,
 450                                                  client,
 451                                                  atoms[_XEMBED_INFO],
 452                                                  XCB_GET_PROPERTY_TYPE_ANY,
 453                                                  0,
 454                                                  2 * 32);
 455
 456             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 457                                                                        xembedc,
 458                                                                        NULL);
 459             if (xembedr != NULL && xembedr->length != 0) {
 460                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 461                 uint32_t *xembed = xcb_get_property_value(xembedr);
 462                 DLOG("xembed version = %d\n", xembed[0]);
 463                 DLOG("xembed flags = %d\n", xembed[1]);
 464                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 465                 xe_version = xembed[0];
 466                 if (xe_version > 1)
 467                     xe_version = 1;
 468                 free(xembedr);
 469             } else {
 470                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 471             }
 472
 473             DLOG("X window %08x requested docking\n", client);
 474             i3_output *walk, *output;
 475             SLIST_FOREACH(walk, outputs, slist) {
 476                 if (!walk->active)
 477                     continue;
 478                 DLOG("using output %s\n", walk->name);
 479                 output = walk;
 480             }
 481             xcb_reparent_window(xcb_connection,
 482                                 client,
 483                                 output->bar,
 484                                 output->rect.w - font_height - 2,
 485                                 2);
 486             /* We reconfigure the window to use a reasonable size. The systray
 487              * specification explicitly says:
 488              *   Tray icons may be assigned any size by the system tray, and
 489              *   should do their best to cope with any size effectively
 490              */
 491             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 492             values[0] = font_height;
 493             values[1] = font_height;
 494             xcb_configure_window(xcb_connection,
 495                                  client,
 496                                  mask,
 497                                  values);
 498
 499             /* send the XEMBED_EMBEDDED_NOTIFY message */
 500             void *event = calloc(32, 1);
 501             xcb_client_message_event_t *ev = event;
 502             ev->response_type = XCB_CLIENT_MESSAGE;
 503             ev->window = client;
 504             ev->type = atoms[_XEMBED];
 505             ev->format = 32;
 506             ev->data.data32[0] = XCB_CURRENT_TIME;
 507             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 508             ev->data.data32[2] = output->bar;
 509             ev->data.data32[3] = xe_version;
 510             xcb_send_event(xcb_connection,
 511                            0,
 512                            client,
 513                            XCB_EVENT_MASK_NO_EVENT,
 514                            (char*)ev);
 515             free(event);
 516
 517             if (map_it) {
 518                 DLOG("Mapping dock client\n");
 519                 xcb_map_window(xcb_connection, client);
 520             } else {
 521                 DLOG("Not mapping dock client yet\n");
 522             }
 523             trayclient *tc = malloc(sizeof(trayclient));
 524             tc->win = client;
 525             tc->mapped = map_it;
 526             tc->xe_version = xe_version;
 527             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 528
 529             /* Trigger an update to copy the statusline text to the appropriate
 530              * position */
 531             configure_trayclients();
 532             draw_bars();
 533         }
 534     }
 535 }
 536
 537 /*
 538  * Handles UnmapNotify events. These events happen when a tray window unmaps
 539  * itself. We then update our data structure
 540  *
 541  */
 542 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 543     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 544
 545     i3_output *walk;
 546     SLIST_FOREACH(walk, outputs, slist) {
 547         if (!walk->active)
 548             continue;
 549         DLOG("checking output %s\n", walk->name);
 550         trayclient *trayclient;
 551         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 552             if (trayclient->win != event->window)
 553                 continue;
 554
 555             DLOG("Removing tray client with window ID %08x\n", event->window);
 556             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 557
 558             /* Trigger an update, we now have more space for the statusline */
 559             configure_trayclients();
 560             draw_bars();
 561             return;
 562         }
 563     }
 564 }
 565
 566 /*
 567  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 568  * handled, which tells us whether a dock client should be mapped or unmapped.
 569  *
 570  */
 571 static void handle_property_notify(xcb_property_notify_event_t *event) {
 572     DLOG("PropertyNotify\n");
 573     if (event->atom == atoms[_XEMBED_INFO] &&
 574         event->state == XCB_PROPERTY_NEW_VALUE) {
 575         DLOG("xembed_info updated\n");
 576         trayclient *trayclient = NULL, *walk;
 577         i3_output *o_walk;
 578         SLIST_FOREACH(o_walk, outputs, slist) {
 579             if (!o_walk->active)
 580                 continue;
 581
 582             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 583                 if (walk->win != event->window)
 584                     continue;
 585                 trayclient = walk;
 586                 break;
 587             }
 588
 589             if (trayclient)
 590                 break;
 591         }
 592         if (!trayclient) {
 593             ELOG("PropertyNotify received for unknown window %08x\n",
 594                  event->window);
 595             return;
 596         }
 597         xcb_get_property_cookie_t xembedc;
 598         xembedc = xcb_get_property_unchecked(xcb_connection,
 599                                              0,
 600                                              trayclient->win,
 601                                              atoms[_XEMBED_INFO],
 602                                              XCB_GET_PROPERTY_TYPE_ANY,
 603                                              0,
 604                                              2 * 32);
 605
 606         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 607                                                                    xembedc,
 608                                                                    NULL);
 609         if (xembedr == NULL || xembedr->length == 0)
 610             return;
 611
 612         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 613         uint32_t *xembed = xcb_get_property_value(xembedr);
 614         DLOG("xembed version = %d\n", xembed[0]);
 615         DLOG("xembed flags = %d\n", xembed[1]);
 616         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 617         DLOG("map-state now %d\n", map_it);
 618         if (trayclient->mapped && !map_it) {
 619             /* need to unmap the window */
 620             xcb_unmap_window(xcb_connection, trayclient->win);
 621             trayclient->mapped = map_it;
 622             draw_bars();
 623         } else if (!trayclient->mapped && map_it) {
 624             /* need to map the window */
 625             xcb_map_window(xcb_connection, trayclient->win);
 626             trayclient->mapped = map_it;
 627             draw_bars();
 628         }
 629         free(xembedr);
 630     }
 631 }
 632
 633 /*
 634  * This function is called immediately before the main loop locks. We flush xcb
 635  * then (and only then)
 636  *
 637  */
 638 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 639     xcb_flush(xcb_connection);
 640 }
 641
 642 /*
 643  * This function is called immediately after the main loop locks, so when one
 644  * of the watchers registered an event.
 645  * We check whether an X-Event arrived and handle it.
 646  *
 647  */
 648 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 649     xcb_generic_event_t *event;
 650     while ((event = xcb_poll_for_event(xcb_connection)) == NULL) {
 651         return;
 652     }
 653
 654     switch (event->response_type & ~0x80) {
 655         case XCB_EXPOSE:
 656             /* Expose-events happen, when the window needs to be redrawn */
 657             redraw_bars();
 658             break;
 659         case XCB_BUTTON_PRESS:
 660             /* Button-press-events are mouse-buttons clicked on one of our bars */
 661             handle_button((xcb_button_press_event_t*) event);
 662             break;
 663         case XCB_CLIENT_MESSAGE:
 664             /* Client messages are used for client-to-client communication, for
 665              * example system tray widgets talk to us directly via client messages. */
 666             handle_client_message((xcb_client_message_event_t*) event);
 667             break;
 668         case XCB_UNMAP_NOTIFY:
 669             /* UnmapNotifies are received when a tray window unmaps itself */
 670             handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 671             break;
 672         case XCB_PROPERTY_NOTIFY:
 673             /* PropertyNotify */
 674             handle_property_notify((xcb_property_notify_event_t*) event);
 675             break;
 676     }
 677     FREE(event);
 678 }
 679
 680 /*
 681  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 682  * are triggered
 683  *
 684  */
 685 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 686 }
 687
 688 /*
 689  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 690  *
 691  */
 692 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 693     XkbEvent ev;
 694     int modstate = 0;
 695
 696     DLOG("Got XKB-Event!\n");
 697
 698     while (XPending(xkb_dpy)) {
 699         XNextEvent(xkb_dpy, (XEvent*)&ev);
 700
 701         if (ev.type != xkb_event_base) {
 702             ELOG("No Xkb-Event!\n");
 703             continue;
 704         }
 705
 706         if (ev.any.xkb_type != XkbStateNotify) {
 707             ELOG("No State Notify!\n");
 708             continue;
 709         }
 710
 711         unsigned int mods = ev.state.mods;
 712         modstate = mods & Mod4Mask;
 713     }
 714
 715     if (modstate != mod_pressed) {
 716         if (modstate == 0) {
 717             DLOG("Mod4 got released!\n");
 718             hide_bars();
 719         } else {
 720             DLOG("Mod4 got pressed!\n");
 721             unhide_bars();
 722         }
 723         mod_pressed = modstate;
 724     }
 725 }
 726
 727 /*
 728  * Initialize xcb and use the specified fontname for text-rendering
 729  *
 730  */
 731 char *init_xcb(char *fontname) {
 732     /* FIXME: xcb_connect leaks Memory */
 733     xcb_connection = xcb_connect(NULL, &screen);
 734     if (xcb_connection_has_error(xcb_connection)) {
 735         ELOG("Cannot open display\n");
 736         exit(EXIT_FAILURE);
 737     }
 738     DLOG("Connected to xcb\n");
 739
 740     /* We have to request the atoms we need */
 741     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 742     #include "xcb_atoms.def"
 743
 744     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 745     xcb_root = xcb_screen->root;
 746
 747     /* We load and allocate the font */
 748     xcb_font = xcb_generate_id(xcb_connection);
 749     xcb_void_cookie_t open_font_cookie;
 750     open_font_cookie = xcb_open_font_checked(xcb_connection,
 751                                              xcb_font,
 752                                              strlen(fontname),
 753                                              fontname);
 754
 755     /* We need to save info about the font, because we need the font's height and
 756      * information about the width of characters */
 757     xcb_query_font_cookie_t query_font_cookie;
 758     query_font_cookie = xcb_query_font(xcb_connection,
 759                                        xcb_font);
 760
 761     /* To grab modifiers without blocking other applications from receiving key-events
 762      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 763      * in xcb */
 764     if (config.hide_on_modifier) {
 765         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 766         xkb_major = XkbMajorVersion;
 767         xkb_minor = XkbMinorVersion;
 768
 769         xkb_dpy = XkbOpenDisplay(NULL,
 770                                  &xkb_event_base,
 771                                  &xkb_errbase,
 772                                  &xkb_major,
 773                                  &xkb_minor,
 774                                  &xkb_err);
 775
 776         if (xkb_dpy == NULL) {
 777             ELOG("No XKB!\n");
 778             exit(EXIT_FAILURE);
 779         }
 780
 781         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 782             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 783             exit(EXIT_FAILURE);
 784         }
 785
 786         int i1;
 787         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 788             ELOG("XKB not supported by X-server!\n");
 789             exit(EXIT_FAILURE);
 790         }
 791
 792         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 793             ELOG("Could not grab Key!\n");
 794             exit(EXIT_FAILURE);
 795         }
 796
 797         xkb_io = malloc(sizeof(ev_io));
 798         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 799         ev_io_start(main_loop, xkb_io);
 800         XFlush(xkb_dpy);
 801     }
 802
 803     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 804      * this way, we can choose to crop it */
 805     uint32_t mask = XCB_GC_FOREGROUND;
 806     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
 807
 808     statusline_clear = xcb_generate_id(xcb_connection);
 809     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 810                                                                statusline_clear,
 811                                                                xcb_root,
 812                                                                mask,
 813                                                                vals);
 814
 815     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
 816     vals[0] = colors.bar_fg;
 817     statusline_ctx = xcb_generate_id(xcb_connection);
 818     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 819                                                             statusline_ctx,
 820                                                             xcb_root,
 821                                                             mask,
 822                                                             vals);
 823
 824     statusline_pm = xcb_generate_id(xcb_connection);
 825     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 826                                                                xcb_screen->root_depth,
 827                                                                statusline_pm,
 828                                                                xcb_root,
 829                                                                xcb_screen->width_in_pixels,
 830                                                                xcb_screen->height_in_pixels);
 831
 832
 833     /* The various Watchers to communicate with xcb */
 834     xcb_io = malloc(sizeof(ev_io));
 835     xcb_prep = malloc(sizeof(ev_prepare));
 836     xcb_chk = malloc(sizeof(ev_check));
 837
 838     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 839     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 840     ev_check_init(xcb_chk, &xcb_chk_cb);
 841
 842     ev_io_start(main_loop, xcb_io);
 843     ev_prepare_start(main_loop, xcb_prep);
 844     ev_check_start(main_loop, xcb_chk);
 845
 846     /* Now we get the atoms and save them in a nice data structure */
 847     get_atoms();
 848
 849     xcb_get_property_cookie_t path_cookie;
 850     path_cookie = xcb_get_property_unchecked(xcb_connection,
 851                                    0,
 852                                    xcb_root,
 853                                    atoms[I3_SOCKET_PATH],
 854                                    XCB_GET_PROPERTY_TYPE_ANY,
 855                                    0, PATH_MAX);
 856
 857     /* We check, if i3 set its socket-path */
 858     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 859                                                                   path_cookie,
 860                                                                   NULL);
 861     char *path = NULL;
 862     if (path_reply) {
 863         int len = xcb_get_property_value_length(path_reply);
 864         if (len != 0) {
 865             path = strndup(xcb_get_property_value(path_reply), len);
 866         }
 867     }
 868
 869     /* Now we save the font-infos */
 870     font_info = xcb_query_font_reply(xcb_connection,
 871                                      query_font_cookie,
 872                                      NULL);
 873
 874     if (xcb_request_failed(open_font_cookie, "Could not open font")) {
 875         exit(EXIT_FAILURE);
 876     }
 877
 878     font_height = font_info->font_ascent + font_info->font_descent;
 879
 880     if (xcb_query_font_char_infos_length(font_info) == 0) {
 881         font_table = NULL;
 882     } else {
 883         font_table = xcb_query_font_char_infos(font_info);
 884     }
 885
 886     DLOG("Calculated Font-height: %d\n", font_height);
 887
 888     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 889         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 890         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 891         exit(EXIT_FAILURE);
 892     }
 893
 894     return path;
 895 }
 896
 897 /*
 898  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 899  * for the X11 display we are running on, then acquiring the selection for this
 900  * atom. Afterwards, tray clients will send ClientMessages to our window.
 901  *
 902  */
 903 void init_tray() {
 904     /* request the tray manager atom for the X11 display we are running on */
 905     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 906     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 907     xcb_intern_atom_cookie_t tray_cookie;
 908     xcb_intern_atom_reply_t *tray_reply;
 909     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 910
 911     /* tray support: we need a window to own the selection */
 912     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 913     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 914     uint32_t selval[] = { 1 };
 915     xcb_create_window(xcb_connection,
 916                       xcb_screen->root_depth,
 917                       selwin,
 918                       xcb_root,
 919                       -1, -1,
 920                       1, 1,
 921                       1,
 922                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 923                       xcb_screen->root_visual,
 924                       selmask,
 925                       selval);
 926
 927     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 928     /* set the atoms */
 929     xcb_change_property(xcb_connection,
 930                         XCB_PROP_MODE_REPLACE,
 931                         selwin,
 932                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 933                         atoms[CARDINAL],
 934                         32,
 935                         1,
 936                         &orientation);
 937
 938     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 939         ELOG("Could not get atom %s\n", atomname);
 940         exit(EXIT_FAILURE);
 941     }
 942
 943     xcb_set_selection_owner(xcb_connection,
 944                             selwin,
 945                             tray_reply->atom,
 946                             XCB_CURRENT_TIME);
 947
 948     /* Verify that we have the selection */
 949     xcb_get_selection_owner_cookie_t selcookie;
 950     xcb_get_selection_owner_reply_t *selreply;
 951
 952     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
 953     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
 954         ELOG("Could not get selection owner for %s\n", atomname);
 955         exit(EXIT_FAILURE);
 956     }
 957
 958     if (selreply->owner != selwin) {
 959         ELOG("Could not set the %s selection. " \
 960              "Maybe another tray is already running?\n", atomname);
 961         /* NOTE that this error is not fatal. We just can’t provide tray
 962          * functionality */
 963         free(selreply);
 964         return;
 965     }
 966
 967     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
 968     void *event = calloc(32, 1);
 969     xcb_client_message_event_t *ev = event;
 970     ev->response_type = XCB_CLIENT_MESSAGE;
 971     ev->window = xcb_root;
 972     ev->type = atoms[MANAGER];
 973     ev->format = 32;
 974     ev->data.data32[0] = XCB_CURRENT_TIME;
 975     ev->data.data32[1] = tray_reply->atom;
 976     ev->data.data32[2] = selwin;
 977     xcb_send_event(xcb_connection,
 978                    0,
 979                    xcb_root,
 980                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
 981                    (char*)ev);
 982     free(event);
 983     free(tray_reply);
 984 }
 985
 986 /*
 987  * Cleanup the xcb-stuff.
 988  * Called once, before the program terminates.
 989  *
 990  */
 991 void clean_xcb() {
 992     i3_output *o_walk;
 993     trayclient *trayclient;
 994     free_workspaces();
 995     SLIST_FOREACH(o_walk, outputs, slist) {
 996         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
 997             /* Unmap, then reparent (to root) the tray client windows */
 998             xcb_unmap_window(xcb_connection, trayclient->win);
 999             xcb_reparent_window(xcb_connection,
1000                                 trayclient->win,
1001                                 xcb_root,
1002                                 0,
1003                                 0);
1004         }
1005         destroy_window(o_walk);
1006         FREE(o_walk->trayclients);
1007         FREE(o_walk->workspaces);
1008         FREE(o_walk->name);
1009     }
1010     FREE_SLIST(outputs, i3_output);
1011     FREE(outputs);
1012
1013     xcb_flush(xcb_connection);
1014     xcb_disconnect(xcb_connection);
1015
1016     ev_check_stop(main_loop, xcb_chk);
1017     ev_prepare_stop(main_loop, xcb_prep);
1018     ev_io_stop(main_loop, xcb_io);
1019
1020     FREE(xcb_chk);
1021     FREE(xcb_prep);
1022     FREE(xcb_io);
1023     FREE(font_info);
1024 }
1025
1026 /*
1027  * Get the earlier requested atoms and save them in the prepared data structure
1028  *
1029  */
1030 void get_atoms() {
1031     xcb_intern_atom_reply_t *reply;
1032     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1033         if (reply == NULL) { \
1034             ELOG("Could not get atom %s\n", #name); \
1035             exit(EXIT_FAILURE); \
1036         } \
1037         atoms[name] = reply->atom; \
1038         free(reply);
1039
1040     #include "xcb_atoms.def"
1041     DLOG("Got Atoms\n");
1042 }
1043
1044 /*
1045  * Destroy the bar of the specified output
1046  *
1047  */
1048 void destroy_window(i3_output *output) {
1049     if (output == NULL) {
1050         return;
1051     }
1052     if (output->bar == XCB_NONE) {
1053         return;
1054     }
1055     xcb_destroy_window(xcb_connection, output->bar);
1056     output->bar = XCB_NONE;
1057 }
1058
1059 /*
1060  * Reallocate the statusline-buffer
1061  *
1062  */
1063 void realloc_sl_buffer() {
1064     xcb_free_pixmap(xcb_connection, statusline_pm);
1065     statusline_pm = xcb_generate_id(xcb_connection);
1066     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1067                                                                xcb_screen->root_depth,
1068                                                                statusline_pm,
1069                                                                xcb_root,
1070                                                                xcb_screen->width_in_pixels,
1071                                                                xcb_screen->height_in_pixels);
1072
1073     uint32_t mask = XCB_GC_FOREGROUND;
1074     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
1075     xcb_free_gc(xcb_connection, statusline_clear);
1076     statusline_clear = xcb_generate_id(xcb_connection);
1077     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1078                                                                statusline_clear,
1079                                                                xcb_root,
1080                                                                mask,
1081                                                                vals);
1082
1083     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
1084     vals[0] = colors.bar_fg;
1085     statusline_ctx = xcb_generate_id(xcb_connection);
1086     xcb_free_gc(xcb_connection, statusline_ctx);
1087     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1088                                                             statusline_ctx,
1089                                                             xcb_root,
1090                                                             mask,
1091                                                             vals);
1092
1093     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1094         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1095         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1096         exit(EXIT_FAILURE);
1097     }
1098
1099 }
1100
1101 /*
1102  * Reconfigure all bars and create new bars for recently activated outputs
1103  *
1104  */
1105 void reconfig_windows() {
1106     uint32_t mask;
1107     uint32_t values[5];
1108
1109     i3_output *walk;
1110     SLIST_FOREACH(walk, outputs, slist) {
1111         if (!walk->active) {
1112             /* If an output is not active, we destroy its bar */
1113             /* FIXME: Maybe we rather want to unmap? */
1114             DLOG("Destroying window for output %s\n", walk->name);
1115             destroy_window(walk);
1116             continue;
1117         }
1118         if (walk->bar == XCB_NONE) {
1119             DLOG("Creating Window for output %s\n", walk->name);
1120
1121             /* TODO: only call init_tray() if the tray is configured for this output */
1122             init_tray();
1123
1124             walk->bar = xcb_generate_id(xcb_connection);
1125             walk->buffer = xcb_generate_id(xcb_connection);
1126             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1127             /* Black background */
1128             values[0] = colors.bar_bg;
1129             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1130             values[1] = config.hide_on_modifier;
1131             /* The events we want to receive */
1132             values[2] = XCB_EVENT_MASK_EXPOSURE;
1133             if (!config.disable_ws) {
1134                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1135             }
1136             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1137                                                                      xcb_screen->root_depth,
1138                                                                      walk->bar,
1139                                                                      xcb_root,
1140                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
1141                                                                      walk->rect.w, font_height + 6,
1142                                                                      1,
1143                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1144                                                                      xcb_screen->root_visual,
1145                                                                      mask,
1146                                                                      values);
1147
1148             /* The double-buffer we use to render stuff off-screen */
1149             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1150                                                                     xcb_screen->root_depth,
1151                                                                     walk->buffer,
1152                                                                     walk->bar,
1153                                                                     walk->rect.w,
1154                                                                     walk->rect.h);
1155
1156             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1157              * this one */
1158             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1159                                                                 XCB_PROP_MODE_REPLACE,
1160                                                                 walk->bar,
1161                                                                 atoms[_NET_WM_WINDOW_TYPE],
1162                                                                 XCB_ATOM_ATOM,
1163                                                                 32,
1164                                                                 1,
1165                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1166
1167             /* We need to tell i3, where to reserve space for i3bar */
1168             /* left, right, top, bottom, left_start_y, left_end_y,
1169              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1170              * bottom_end_x */
1171             /* A local struct to save the strut_partial property */
1172             struct {
1173                 uint32_t left;
1174                 uint32_t right;
1175                 uint32_t top;
1176                 uint32_t bottom;
1177                 uint32_t left_start_y;
1178                 uint32_t left_end_y;
1179                 uint32_t right_start_y;
1180                 uint32_t right_end_y;
1181                 uint32_t top_start_x;
1182                 uint32_t top_end_x;
1183                 uint32_t bottom_start_x;
1184                 uint32_t bottom_end_x;
1185             } __attribute__((__packed__)) strut_partial = {0,};
1186             switch (config.dockpos) {
1187                 case DOCKPOS_NONE:
1188                     break;
1189                 case DOCKPOS_TOP:
1190                     strut_partial.top = font_height + 6;
1191                     strut_partial.top_start_x = walk->rect.x;
1192                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1193                     break;
1194                 case DOCKPOS_BOT:
1195                     strut_partial.bottom = font_height + 6;
1196                     strut_partial.bottom_start_x = walk->rect.x;
1197                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1198                     break;
1199             }
1200             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1201                                                                  XCB_PROP_MODE_REPLACE,
1202                                                                  walk->bar,
1203                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1204                                                                  XCB_ATOM_CARDINAL,
1205                                                                  32,
1206                                                                  12,
1207                                                                  &strut_partial);
1208
1209             /* We also want a graphics-context for the bars (it defines the properties
1210              * with which we draw to them) */
1211             walk->bargc = xcb_generate_id(xcb_connection);
1212             mask = XCB_GC_FONT;
1213             values[0] = xcb_font;
1214             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1215                                                                 walk->bargc,
1216                                                                 walk->bar,
1217                                                                 mask,
1218                                                                 values);
1219
1220             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1221             xcb_void_cookie_t map_cookie;
1222             if (!config.hide_on_modifier) {
1223                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1224             }
1225
1226             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1227                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1228                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1229                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1230                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1231                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1232                 exit(EXIT_FAILURE);
1233             }
1234         } else {
1235             /* We already have a bar, so we just reconfigure it */
1236             mask = XCB_CONFIG_WINDOW_X |
1237                    XCB_CONFIG_WINDOW_Y |
1238                    XCB_CONFIG_WINDOW_WIDTH |
1239                    XCB_CONFIG_WINDOW_HEIGHT |
1240                    XCB_CONFIG_WINDOW_STACK_MODE;
1241             values[0] = walk->rect.x;
1242             values[1] = walk->rect.y + walk->rect.h - font_height - 6;
1243             values[2] = walk->rect.w;
1244             values[3] = font_height + 6;
1245             values[4] = XCB_STACK_MODE_ABOVE;
1246
1247             DLOG("Destroying buffer for output %s", walk->name);
1248             xcb_free_pixmap(xcb_connection, walk->buffer);
1249
1250             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1251             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1252                                                                         walk->bar,
1253                                                                         mask,
1254                                                                         values);
1255
1256             DLOG("Recreating buffer for output %s", walk->name);
1257             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1258                                                                     xcb_screen->root_depth,
1259                                                                     walk->buffer,
1260                                                                     walk->bar,
1261                                                                     walk->rect.w,
1262                                                                     walk->rect.h);
1263
1264             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1265                 exit(EXIT_FAILURE);
1266             }
1267             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1268                 exit(EXIT_FAILURE);
1269             }
1270         }
1271     }
1272 }
1273
1274 /*
1275  * Render the bars, with buttons and statusline
1276  *
1277  */
1278 void draw_bars() {
1279     DLOG("Drawing Bars...\n");
1280     int i = 0;
1281
1282     refresh_statusline();
1283
1284     i3_output *outputs_walk;
1285     SLIST_FOREACH(outputs_walk, outputs, slist) {
1286         if (!outputs_walk->active) {
1287             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1288             continue;
1289         }
1290         if (outputs_walk->bar == XCB_NONE) {
1291             /* Oh shit, an active output without an own bar. Create it now! */
1292             reconfig_windows();
1293         }
1294         /* First things first: clear the backbuffer */
1295         uint32_t color = colors.bar_bg;
1296         xcb_change_gc(xcb_connection,
1297                       outputs_walk->bargc,
1298                       XCB_GC_FOREGROUND,
1299                       &color);
1300         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
1301         xcb_poly_fill_rectangle(xcb_connection,
1302                                 outputs_walk->buffer,
1303                                 outputs_walk->bargc,
1304                                 1,
1305                                 &rect);
1306
1307         if (statusline != NULL) {
1308             DLOG("Printing statusline!\n");
1309
1310             /* Luckily we already prepared a seperate pixmap containing the rendered
1311              * statusline, we just have to copy the relevant parts to the relevant
1312              * position */
1313             trayclient *trayclient;
1314             int traypx = 0;
1315             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1316                 if (!trayclient->mapped)
1317                     continue;
1318                 /* We assume the tray icons are quadratic (we use the font
1319                  * *height* as *width* of the icons) because we configured them
1320                  * like this. */
1321                 traypx += font_height;
1322             }
1323             /* Add 2px of padding if there are any tray icons */
1324             if (traypx > 0)
1325                 traypx += 2;
1326             xcb_copy_area(xcb_connection,
1327                           statusline_pm,
1328                           outputs_walk->buffer,
1329                           outputs_walk->bargc,
1330                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1331                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1332                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
1333         }
1334
1335         if (config.disable_ws) {
1336             continue;
1337         }
1338
1339         i3_ws *ws_walk;
1340         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1341             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1342             uint32_t fg_color = colors.inactive_ws_fg;
1343             uint32_t bg_color = colors.inactive_ws_bg;
1344             if (ws_walk->visible) {
1345                 if (!ws_walk->focused) {
1346                     fg_color = colors.active_ws_fg;
1347                     bg_color = colors.active_ws_bg;
1348                 } else {
1349                     fg_color = colors.focus_ws_fg;
1350                     bg_color = colors.focus_ws_bg;
1351                 }
1352             }
1353             if (ws_walk->urgent) {
1354                 DLOG("WS %s is urgent!\n", ws_walk->name);
1355                 fg_color = colors.urgent_ws_fg;
1356                 bg_color = colors.urgent_ws_bg;
1357                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1358                 unhide_bars();
1359             }
1360             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1361             uint32_t vals[] = { bg_color, bg_color };
1362             xcb_change_gc(xcb_connection,
1363                           outputs_walk->bargc,
1364                           mask,
1365                           vals);
1366             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
1367             xcb_poly_fill_rectangle(xcb_connection,
1368                                     outputs_walk->buffer,
1369                                     outputs_walk->bargc,
1370                                     1,
1371                                     &rect);
1372             xcb_change_gc(xcb_connection,
1373                           outputs_walk->bargc,
1374                           XCB_GC_FOREGROUND,
1375                           &fg_color);
1376             xcb_image_text_16(xcb_connection,
1377                               ws_walk->name_glyphs,
1378                               outputs_walk->buffer,
1379                               outputs_walk->bargc,
1380                               i + 5, font_info->font_ascent + 2,
1381                               ws_walk->ucs2_name);
1382             i += 10 + ws_walk->name_width;
1383         }
1384
1385         i = 0;
1386     }
1387
1388     redraw_bars();
1389 }
1390
1391 /*
1392  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1393  *
1394  */
1395 void redraw_bars() {
1396     i3_output *outputs_walk;
1397     SLIST_FOREACH(outputs_walk, outputs, slist) {
1398         if (!outputs_walk->active) {
1399             continue;
1400         }
1401         xcb_copy_area(xcb_connection,
1402                       outputs_walk->buffer,
1403                       outputs_walk->bar,
1404                       outputs_walk->bargc,
1405                       0, 0,
1406                       0, 0,
1407                       outputs_walk->rect.w,
1408                       outputs_walk->rect.h);
1409         xcb_flush(xcb_connection);
1410     }
1411 }