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  *
   6  * © 2010-2011 Axel Wagner and contributors
   7  *
   8  * See file LICNSE for license information
   9  *
  10  * src/xcb.c: Communicating with X
  11  *
  12  */
  13 #include <xcb/xcb.h>
  14 #include <xcb/xproto.h>
  15 #include <xcb/xcb_atom.h>
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <unistd.h>
  19 #include <fcntl.h>
  20 #include <string.h>
  21 #include <i3/ipc.h>
  22 #include <ev.h>
  23 #include <errno.h>
  24 #include <limits.h>
  25
  26 #include <X11/Xlib.h>
  27 #include <X11/XKBlib.h>
  28 #include <X11/extensions/XKB.h>
  29
  30 #include "common.h"
  31 #include "libi3.h"
  32
  33 #if defined(__APPLE__)
  34
  35 /*
  36  * Taken from FreeBSD
  37  * Returns a pointer to a new string which is a duplicate of the
  38  * string, but only copies at most n characters.
  39  *
  40  */
  41 char *strndup(const char *str, size_t n) {
  42     size_t len;
  43     char *copy;
  44
  45     for (len = 0; len < n && str[len]; len++)
  46         continue;
  47
  48     if ((copy = malloc(len + 1)) == NULL)
  49         return (NULL);
  50     memcpy(copy, str, len);
  51     copy[len] = '\0';
  52     return (copy);
  53 }
  54
  55 #endif
  56
  57 /* We save the Atoms in an easy to access array, indexed by an enum */
  58 enum {
  59     #define ATOM_DO(name) name,
  60     #include "xcb_atoms.def"
  61     NUM_ATOMS
  62 };
  63
  64 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  65 xcb_atom_t               atoms[NUM_ATOMS];
  66
  67 /* Variables, that are the same for all functions at all times */
  68 xcb_connection_t *xcb_connection;
  69 int              screen;
  70 xcb_screen_t     *xcb_screen;
  71 xcb_window_t     xcb_root;
  72 xcb_font_t       xcb_font;
  73
  74 /* We need to cache some data to speed up text-width-prediction */
  75 xcb_query_font_reply_t *font_info;
  76 int                    font_height;
  77 xcb_charinfo_t         *font_table;
  78
  79 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  80 Display          *xkb_dpy;
  81 int              xkb_event_base;
  82 int              mod_pressed = 0;
  83
  84 /* Because the statusline is the same on all outputs, we have
  85  * global buffer to render it on */
  86 xcb_gcontext_t   statusline_ctx;
  87 xcb_gcontext_t   statusline_clear;
  88 xcb_pixmap_t     statusline_pm;
  89 uint32_t         statusline_width;
  90
  91 /* Event-Watchers, to interact with the user */
  92 ev_prepare *xcb_prep;
  93 ev_check   *xcb_chk;
  94 ev_io      *xcb_io;
  95 ev_io      *xkb_io;
  96
  97 /* The parsed colors */
  98 struct xcb_colors_t {
  99     uint32_t bar_fg;
 100     uint32_t bar_bg;
 101     uint32_t active_ws_fg;
 102     uint32_t active_ws_bg;
 103     uint32_t inactive_ws_fg;
 104     uint32_t inactive_ws_bg;
 105     uint32_t urgent_ws_bg;
 106     uint32_t urgent_ws_fg;
 107     uint32_t focus_ws_bg;
 108     uint32_t focus_ws_fg;
 109 };
 110 struct xcb_colors_t colors;
 111
 112 /* We define xcb_request_failed as a macro to include the relevant line-number */
 113 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 114 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 115     xcb_generic_error_t *err;
 116     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 117         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 118         return err->error_code;
 119     }
 120     return 0;
 121 }
 122
 123 /*
 124  * Predicts the length of text based on cached data.
 125  * The string has to be encoded in ucs2 and glyph_len has to be the length
 126  * of the string (in glyphs).
 127  *
 128  */
 129 uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
 130     /* If we don't have per-character data, return the maximum width */
 131     if (font_table == NULL) {
 132         return (font_info->max_bounds.character_width * length);
 133     }
 134
 135     uint32_t width = 0;
 136     uint32_t i;
 137
 138     for (i = 0; i < length; i++) {
 139         xcb_charinfo_t *info;
 140         int row = text[i].byte1;
 141         int col = text[i].byte2;
 142
 143         if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
 144             col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2) {
 145             continue;
 146         }
 147
 148         /* Don't you ask me, how this one works… */
 149         info = &font_table[((row - font_info->min_byte1) *
 150                             (font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
 151                            (col - font_info->min_char_or_byte2)];
 152
 153         if (info->character_width != 0 ||
 154             (info->right_side_bearing |
 155              info->left_side_bearing |
 156              info->ascent |
 157              info->descent) != 0) {
 158             width += info->character_width;
 159         }
 160     }
 161
 162     return width;
 163 }
 164
 165 /*
 166  * Draws text given in UCS-2-encoding to a given drawable and position
 167  *
 168  */
 169 void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
 170                xcb_char2b_t *text, uint32_t glyph_count) {
 171     int offset = 0;
 172     int16_t pos_x = x;
 173     int16_t font_ascent = font_info->font_ascent;
 174
 175     while (glyph_count > 0) {
 176         uint8_t chunk_size = MIN(255, glyph_count);
 177         uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
 178
 179         xcb_image_text_16(xcb_connection,
 180                           chunk_size,
 181                           drawable,
 182                           ctx,
 183                           pos_x, y + font_ascent,
 184                           text + offset);
 185
 186         offset += chunk_size;
 187         pos_x += chunk_width;
 188         glyph_count -= chunk_size;
 189     }
 190 }
 191
 192 /*
 193  * Converts a colorstring to a colorpixel as expected from xcb_change_gc.
 194  * s is assumed to be in the format "rrggbb"
 195  *
 196  */
 197 uint32_t get_colorpixel(const char *s) {
 198     char strings[3][3] = { { s[0], s[1], '\0'} ,
 199                            { s[2], s[3], '\0'} ,
 200                            { s[4], s[5], '\0'} };
 201     uint8_t r = strtol(strings[0], NULL, 16);
 202     uint8_t g = strtol(strings[1], NULL, 16);
 203     uint8_t b = strtol(strings[2], NULL, 16);
 204     return (r << 16 | g << 8 | b);
 205 }
 206
 207 /*
 208  * Redraws the statusline to the buffer
 209  *
 210  */
 211 void refresh_statusline() {
 212     int glyph_count;
 213
 214     if (statusline == NULL) {
 215         return;
 216     }
 217
 218     xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
 219     uint32_t old_statusline_width = statusline_width;
 220     statusline_width = predict_text_extents(text, glyph_count);
 221     /* If the statusline is bigger than our screen we need to make sure that
 222      * the pixmap provides enough space, so re-allocate if the width grew */
 223     if (statusline_width > xcb_screen->width_in_pixels &&
 224         statusline_width > old_statusline_width)
 225         realloc_sl_buffer();
 226
 227     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
 228     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 229     draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
 230
 231     FREE(text);
 232 }
 233
 234 /*
 235  * Hides all bars (unmaps them)
 236  *
 237  */
 238 void hide_bars() {
 239     if (!config.hide_on_modifier) {
 240         return;
 241     }
 242
 243     i3_output *walk;
 244     SLIST_FOREACH(walk, outputs, slist) {
 245         if (!walk->active) {
 246             continue;
 247         }
 248         xcb_unmap_window(xcb_connection, walk->bar);
 249     }
 250     stop_child();
 251 }
 252
 253 /*
 254  * Unhides all bars (maps them)
 255  *
 256  */
 257 void unhide_bars() {
 258     if (!config.hide_on_modifier) {
 259         return;
 260     }
 261
 262     i3_output           *walk;
 263     xcb_void_cookie_t   cookie;
 264     uint32_t            mask;
 265     uint32_t            values[5];
 266
 267     cont_child();
 268
 269     SLIST_FOREACH(walk, outputs, slist) {
 270         if (walk->bar == XCB_NONE) {
 271             continue;
 272         }
 273         mask = XCB_CONFIG_WINDOW_X |
 274                XCB_CONFIG_WINDOW_Y |
 275                XCB_CONFIG_WINDOW_WIDTH |
 276                XCB_CONFIG_WINDOW_HEIGHT |
 277                XCB_CONFIG_WINDOW_STACK_MODE;
 278         values[0] = walk->rect.x;
 279         values[1] = walk->rect.y + walk->rect.h - font_height - 6;
 280         values[2] = walk->rect.w;
 281         values[3] = font_height + 6;
 282         values[4] = XCB_STACK_MODE_ABOVE;
 283         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 284         cookie = xcb_configure_window_checked(xcb_connection,
 285                                               walk->bar,
 286                                               mask,
 287                                               values);
 288
 289         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 290             exit(EXIT_FAILURE);
 291         }
 292         xcb_map_window(xcb_connection, walk->bar);
 293     }
 294 }
 295
 296 /*
 297  * Parse the colors into a format that we can use
 298  *
 299  */
 300 void init_colors(const struct xcb_color_strings_t *new_colors) {
 301 #define PARSE_COLOR(name, def) \
 302     do { \
 303         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 304     } while  (0)
 305     PARSE_COLOR(bar_fg, "FFFFFF");
 306     PARSE_COLOR(bar_bg, "000000");
 307     PARSE_COLOR(active_ws_fg, "FFFFFF");
 308     PARSE_COLOR(active_ws_bg, "480000");
 309     PARSE_COLOR(inactive_ws_fg, "FFFFFF");
 310     PARSE_COLOR(inactive_ws_bg, "240000");
 311     PARSE_COLOR(urgent_ws_fg, "FFFFFF");
 312     PARSE_COLOR(urgent_ws_bg, "002400");
 313     PARSE_COLOR(focus_ws_fg, "FFFFFF");
 314     PARSE_COLOR(focus_ws_bg, "480000");
 315 #undef PARSE_COLOR
 316 }
 317
 318 /*
 319  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 320  * We determine, whether the click occured on a ws-button or if the scroll-
 321  * wheel was used and change the workspace appropriately
 322  *
 323  */
 324 void handle_button(xcb_button_press_event_t *event) {
 325     i3_ws *cur_ws;
 326
 327     /* Determine, which bar was clicked */
 328     i3_output *walk;
 329     xcb_window_t bar = event->event;
 330     SLIST_FOREACH(walk, outputs, slist) {
 331         if (walk->bar == bar) {
 332             break;
 333         }
 334     }
 335
 336     if (walk == NULL) {
 337         DLOG("Unknown Bar klicked!\n");
 338         return;
 339     }
 340
 341     /* TODO: Move this to extern get_ws_for_output() */
 342     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 343         if (cur_ws->visible) {
 344             break;
 345         }
 346     }
 347
 348     if (cur_ws == NULL) {
 349         DLOG("No Workspace active?\n");
 350         return;
 351     }
 352
 353     int32_t x = event->event_x;
 354
 355     DLOG("Got Button %d\n", event->detail);
 356
 357     switch (event->detail) {
 358         case 1:
 359             /* Left Mousbutton. We determine, which button was clicked
 360              * and set cur_ws accordingly */
 361             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 362                 DLOG("x = %d\n", x);
 363                 if (x < cur_ws->name_width + 10) {
 364                     break;
 365                 }
 366                 x -= cur_ws->name_width + 10;
 367             }
 368             if (cur_ws == NULL) {
 369                 return;
 370             }
 371             break;
 372         case 4:
 373             /* Mouse wheel down. We select the next ws */
 374             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 375                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 376             } else {
 377                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 378             }
 379             break;
 380         case 5:
 381             /* Mouse wheel up. We select the previos ws */
 382             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 383                 cur_ws = TAILQ_FIRST(walk->workspaces);
 384             } else {
 385                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 386             }
 387             break;
 388     }
 389
 390     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 391     char buffer[len];
 392     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 393     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 394 }
 395
 396 /*
 397  * Configures the x coordinate of all trayclients. To be called after adding a
 398  * new tray client or removing an old one.
 399  *
 400  */
 401 static void configure_trayclients() {
 402     trayclient *trayclient;
 403     i3_output *output;
 404     SLIST_FOREACH(output, outputs, slist) {
 405         if (!output->active)
 406             continue;
 407
 408         int clients = 0;
 409         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 410             clients++;
 411
 412             DLOG("Configuring tray window %08x to x=%d\n",
 413                  trayclient->win, output->rect.w - (clients * (font_height + 2)));
 414             uint32_t x = output->rect.w - (clients * (font_height + 2));
 415             xcb_configure_window(xcb_connection,
 416                                  trayclient->win,
 417                                  XCB_CONFIG_WINDOW_X,
 418                                  &x);
 419         }
 420     }
 421 }
 422
 423 /*
 424  * Handles ClientMessages (messages sent from another client directly to us).
 425  *
 426  * At the moment, only the tray window will receive client messages. All
 427  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 428  *
 429  */
 430 static void handle_client_message(xcb_client_message_event_t* event) {
 431     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 432         event->format == 32) {
 433         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 434         /* event->data.data32[0] is the timestamp */
 435         uint32_t op = event->data.data32[1];
 436         uint32_t mask;
 437         uint32_t values[2];
 438         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 439             xcb_window_t client = event->data.data32[2];
 440
 441             /* Listen for PropertyNotify events to get the most recent value of
 442              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 443             mask = XCB_CW_EVENT_MASK;
 444             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 445                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 446             xcb_change_window_attributes(xcb_connection,
 447                                          client,
 448                                          mask,
 449                                          values);
 450
 451             /* Request the _XEMBED_INFO property. The XEMBED specification
 452              * (which is referred by the tray specification) says this *has* to
 453              * be set, but VLC does not set it… */
 454             bool map_it = true;
 455             int xe_version = 1;
 456             xcb_get_property_cookie_t xembedc;
 457             xembedc = xcb_get_property_unchecked(xcb_connection,
 458                                                  0,
 459                                                  client,
 460                                                  atoms[_XEMBED_INFO],
 461                                                  XCB_GET_PROPERTY_TYPE_ANY,
 462                                                  0,
 463                                                  2 * 32);
 464
 465             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 466                                                                        xembedc,
 467                                                                        NULL);
 468             if (xembedr != NULL && xembedr->length != 0) {
 469                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 470                 uint32_t *xembed = xcb_get_property_value(xembedr);
 471                 DLOG("xembed version = %d\n", xembed[0]);
 472                 DLOG("xembed flags = %d\n", xembed[1]);
 473                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 474                 xe_version = xembed[0];
 475                 if (xe_version > 1)
 476                     xe_version = 1;
 477                 free(xembedr);
 478             } else {
 479                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 480             }
 481
 482             DLOG("X window %08x requested docking\n", client);
 483             i3_output *walk, *output = NULL;
 484             SLIST_FOREACH(walk, outputs, slist) {
 485                 if (!walk->active)
 486                     continue;
 487                 DLOG("using output %s\n", walk->name);
 488                 output = walk;
 489             }
 490             if (output == NULL) {
 491                 ELOG("No output found\n");
 492                 return;
 493             }
 494             xcb_reparent_window(xcb_connection,
 495                                 client,
 496                                 output->bar,
 497                                 output->rect.w - font_height - 2,
 498                                 2);
 499             /* We reconfigure the window to use a reasonable size. The systray
 500              * specification explicitly says:
 501              *   Tray icons may be assigned any size by the system tray, and
 502              *   should do their best to cope with any size effectively
 503              */
 504             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 505             values[0] = font_height;
 506             values[1] = font_height;
 507             xcb_configure_window(xcb_connection,
 508                                  client,
 509                                  mask,
 510                                  values);
 511
 512             /* send the XEMBED_EMBEDDED_NOTIFY message */
 513             void *event = calloc(32, 1);
 514             xcb_client_message_event_t *ev = event;
 515             ev->response_type = XCB_CLIENT_MESSAGE;
 516             ev->window = client;
 517             ev->type = atoms[_XEMBED];
 518             ev->format = 32;
 519             ev->data.data32[0] = XCB_CURRENT_TIME;
 520             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 521             ev->data.data32[2] = output->bar;
 522             ev->data.data32[3] = xe_version;
 523             xcb_send_event(xcb_connection,
 524                            0,
 525                            client,
 526                            XCB_EVENT_MASK_NO_EVENT,
 527                            (char*)ev);
 528             free(event);
 529
 530             if (map_it) {
 531                 DLOG("Mapping dock client\n");
 532                 xcb_map_window(xcb_connection, client);
 533             } else {
 534                 DLOG("Not mapping dock client yet\n");
 535             }
 536             trayclient *tc = malloc(sizeof(trayclient));
 537             tc->win = client;
 538             tc->mapped = map_it;
 539             tc->xe_version = xe_version;
 540             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 541
 542             /* Trigger an update to copy the statusline text to the appropriate
 543              * position */
 544             configure_trayclients();
 545             draw_bars();
 546         }
 547     }
 548 }
 549
 550 /*
 551  * Handles UnmapNotify events. These events happen when a tray window unmaps
 552  * itself. We then update our data structure
 553  *
 554  */
 555 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 556     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 557
 558     i3_output *walk;
 559     SLIST_FOREACH(walk, outputs, slist) {
 560         if (!walk->active)
 561             continue;
 562         DLOG("checking output %s\n", walk->name);
 563         trayclient *trayclient;
 564         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 565             if (trayclient->win != event->window)
 566                 continue;
 567
 568             DLOG("Removing tray client with window ID %08x\n", event->window);
 569             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 570
 571             /* Trigger an update, we now have more space for the statusline */
 572             configure_trayclients();
 573             draw_bars();
 574             return;
 575         }
 576     }
 577 }
 578
 579 /*
 580  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 581  * handled, which tells us whether a dock client should be mapped or unmapped.
 582  *
 583  */
 584 static void handle_property_notify(xcb_property_notify_event_t *event) {
 585     DLOG("PropertyNotify\n");
 586     if (event->atom == atoms[_XEMBED_INFO] &&
 587         event->state == XCB_PROPERTY_NEW_VALUE) {
 588         DLOG("xembed_info updated\n");
 589         trayclient *trayclient = NULL, *walk;
 590         i3_output *o_walk;
 591         SLIST_FOREACH(o_walk, outputs, slist) {
 592             if (!o_walk->active)
 593                 continue;
 594
 595             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 596                 if (walk->win != event->window)
 597                     continue;
 598                 trayclient = walk;
 599                 break;
 600             }
 601
 602             if (trayclient)
 603                 break;
 604         }
 605         if (!trayclient) {
 606             ELOG("PropertyNotify received for unknown window %08x\n",
 607                  event->window);
 608             return;
 609         }
 610         xcb_get_property_cookie_t xembedc;
 611         xembedc = xcb_get_property_unchecked(xcb_connection,
 612                                              0,
 613                                              trayclient->win,
 614                                              atoms[_XEMBED_INFO],
 615                                              XCB_GET_PROPERTY_TYPE_ANY,
 616                                              0,
 617                                              2 * 32);
 618
 619         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 620                                                                    xembedc,
 621                                                                    NULL);
 622         if (xembedr == NULL || xembedr->length == 0)
 623             return;
 624
 625         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 626         uint32_t *xembed = xcb_get_property_value(xembedr);
 627         DLOG("xembed version = %d\n", xembed[0]);
 628         DLOG("xembed flags = %d\n", xembed[1]);
 629         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 630         DLOG("map-state now %d\n", map_it);
 631         if (trayclient->mapped && !map_it) {
 632             /* need to unmap the window */
 633             xcb_unmap_window(xcb_connection, trayclient->win);
 634             trayclient->mapped = map_it;
 635             draw_bars();
 636         } else if (!trayclient->mapped && map_it) {
 637             /* need to map the window */
 638             xcb_map_window(xcb_connection, trayclient->win);
 639             trayclient->mapped = map_it;
 640             draw_bars();
 641         }
 642         free(xembedr);
 643     }
 644 }
 645
 646 /*
 647  * Handle ConfigureRequests by denying them and sending the client a
 648  * ConfigureNotify with its actual size.
 649  *
 650  */
 651 static void handle_configure_request(xcb_configure_request_event_t *event) {
 652     DLOG("ConfigureRequest for window = %08x\n", event->window);
 653
 654     trayclient *trayclient;
 655     i3_output *output;
 656     SLIST_FOREACH(output, outputs, slist) {
 657         if (!output->active)
 658             continue;
 659
 660         int clients = 0;
 661         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 662             clients++;
 663
 664             if (trayclient->win != event->window)
 665                 continue;
 666
 667             xcb_rectangle_t rect;
 668             rect.x = output->rect.w - (clients * (font_height + 2));
 669             rect.y = 2;
 670             rect.width = font_height;
 671             rect.height = font_height;
 672
 673             DLOG("This is a tray window. x = %d\n", rect.x);
 674             fake_configure_notify(xcb_connection, rect, event->window, 0);
 675             return;
 676         }
 677     }
 678
 679     DLOG("WARNING: Could not find corresponding tray window.\n");
 680 }
 681
 682 /*
 683  * This function is called immediately before the main loop locks. We flush xcb
 684  * then (and only then)
 685  *
 686  */
 687 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 688     xcb_flush(xcb_connection);
 689 }
 690
 691 /*
 692  * This function is called immediately after the main loop locks, so when one
 693  * of the watchers registered an event.
 694  * We check whether an X-Event arrived and handle it.
 695  *
 696  */
 697 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 698     xcb_generic_event_t *event;
 699
 700     if (xcb_connection_has_error(xcb_connection)) {
 701         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 702         exit(1);
 703     }
 704
 705     while ((event = xcb_poll_for_event(xcb_connection)) == NULL) {
 706         return;
 707     }
 708
 709     switch (event->response_type & ~0x80) {
 710         case XCB_EXPOSE:
 711             /* Expose-events happen, when the window needs to be redrawn */
 712             redraw_bars();
 713             break;
 714         case XCB_BUTTON_PRESS:
 715             /* Button-press-events are mouse-buttons clicked on one of our bars */
 716             handle_button((xcb_button_press_event_t*) event);
 717             break;
 718         case XCB_CLIENT_MESSAGE:
 719             /* Client messages are used for client-to-client communication, for
 720              * example system tray widgets talk to us directly via client messages. */
 721             handle_client_message((xcb_client_message_event_t*) event);
 722             break;
 723         case XCB_UNMAP_NOTIFY:
 724             /* UnmapNotifies are received when a tray window unmaps itself */
 725             handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 726             break;
 727         case XCB_PROPERTY_NOTIFY:
 728             /* PropertyNotify */
 729             handle_property_notify((xcb_property_notify_event_t*) event);
 730             break;
 731         case XCB_CONFIGURE_REQUEST:
 732             /* ConfigureRequest, sent by a tray child */
 733             handle_configure_request((xcb_configure_request_event_t*) event);
 734             break;
 735     }
 736     FREE(event);
 737 }
 738
 739 /*
 740  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 741  * are triggered
 742  *
 743  */
 744 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 745 }
 746
 747 /*
 748  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 749  *
 750  */
 751 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 752     XkbEvent ev;
 753     int modstate = 0;
 754
 755     DLOG("Got XKB-Event!\n");
 756
 757     while (XPending(xkb_dpy)) {
 758         XNextEvent(xkb_dpy, (XEvent*)&ev);
 759
 760         if (ev.type != xkb_event_base) {
 761             ELOG("No Xkb-Event!\n");
 762             continue;
 763         }
 764
 765         if (ev.any.xkb_type != XkbStateNotify) {
 766             ELOG("No State Notify!\n");
 767             continue;
 768         }
 769
 770         unsigned int mods = ev.state.mods;
 771         modstate = mods & Mod4Mask;
 772     }
 773
 774     if (modstate != mod_pressed) {
 775         if (modstate == 0) {
 776             DLOG("Mod4 got released!\n");
 777             hide_bars();
 778         } else {
 779             DLOG("Mod4 got pressed!\n");
 780             unhide_bars();
 781         }
 782         mod_pressed = modstate;
 783     }
 784 }
 785
 786 /*
 787  * Initialize xcb and use the specified fontname for text-rendering
 788  *
 789  */
 790 char *init_xcb(char *fontname) {
 791     /* FIXME: xcb_connect leaks Memory */
 792     xcb_connection = xcb_connect(NULL, &screen);
 793     if (xcb_connection_has_error(xcb_connection)) {
 794         ELOG("Cannot open display\n");
 795         exit(EXIT_FAILURE);
 796     }
 797     DLOG("Connected to xcb\n");
 798
 799     /* We have to request the atoms we need */
 800     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 801     #include "xcb_atoms.def"
 802
 803     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 804     xcb_root = xcb_screen->root;
 805
 806     /* We load and allocate the font */
 807     xcb_font = xcb_generate_id(xcb_connection);
 808     xcb_void_cookie_t open_font_cookie;
 809     open_font_cookie = xcb_open_font_checked(xcb_connection,
 810                                              xcb_font,
 811                                              strlen(fontname),
 812                                              fontname);
 813
 814     /* We need to save info about the font, because we need the font's height and
 815      * information about the width of characters */
 816     xcb_query_font_cookie_t query_font_cookie;
 817     query_font_cookie = xcb_query_font(xcb_connection,
 818                                        xcb_font);
 819
 820     /* To grab modifiers without blocking other applications from receiving key-events
 821      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 822      * in xcb */
 823     if (config.hide_on_modifier) {
 824         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 825         xkb_major = XkbMajorVersion;
 826         xkb_minor = XkbMinorVersion;
 827
 828         xkb_dpy = XkbOpenDisplay(NULL,
 829                                  &xkb_event_base,
 830                                  &xkb_errbase,
 831                                  &xkb_major,
 832                                  &xkb_minor,
 833                                  &xkb_err);
 834
 835         if (xkb_dpy == NULL) {
 836             ELOG("No XKB!\n");
 837             exit(EXIT_FAILURE);
 838         }
 839
 840         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 841             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 842             exit(EXIT_FAILURE);
 843         }
 844
 845         int i1;
 846         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 847             ELOG("XKB not supported by X-server!\n");
 848             exit(EXIT_FAILURE);
 849         }
 850
 851         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 852             ELOG("Could not grab Key!\n");
 853             exit(EXIT_FAILURE);
 854         }
 855
 856         xkb_io = malloc(sizeof(ev_io));
 857         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 858         ev_io_start(main_loop, xkb_io);
 859         XFlush(xkb_dpy);
 860     }
 861
 862     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 863      * this way, we can choose to crop it */
 864     uint32_t mask = XCB_GC_FOREGROUND;
 865     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
 866
 867     statusline_clear = xcb_generate_id(xcb_connection);
 868     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 869                                                                statusline_clear,
 870                                                                xcb_root,
 871                                                                mask,
 872                                                                vals);
 873
 874     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
 875     vals[0] = colors.bar_fg;
 876     statusline_ctx = xcb_generate_id(xcb_connection);
 877     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 878                                                             statusline_ctx,
 879                                                             xcb_root,
 880                                                             mask,
 881                                                             vals);
 882
 883     statusline_pm = xcb_generate_id(xcb_connection);
 884     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 885                                                                xcb_screen->root_depth,
 886                                                                statusline_pm,
 887                                                                xcb_root,
 888                                                                xcb_screen->width_in_pixels,
 889                                                                xcb_screen->height_in_pixels);
 890
 891
 892     /* The various Watchers to communicate with xcb */
 893     xcb_io = malloc(sizeof(ev_io));
 894     xcb_prep = malloc(sizeof(ev_prepare));
 895     xcb_chk = malloc(sizeof(ev_check));
 896
 897     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 898     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 899     ev_check_init(xcb_chk, &xcb_chk_cb);
 900
 901     ev_io_start(main_loop, xcb_io);
 902     ev_prepare_start(main_loop, xcb_prep);
 903     ev_check_start(main_loop, xcb_chk);
 904
 905     /* Now we get the atoms and save them in a nice data structure */
 906     get_atoms();
 907
 908     xcb_get_property_cookie_t path_cookie;
 909     path_cookie = xcb_get_property_unchecked(xcb_connection,
 910                                    0,
 911                                    xcb_root,
 912                                    atoms[I3_SOCKET_PATH],
 913                                    XCB_GET_PROPERTY_TYPE_ANY,
 914                                    0, PATH_MAX);
 915
 916     /* We check, if i3 set its socket-path */
 917     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 918                                                                   path_cookie,
 919                                                                   NULL);
 920     char *path = NULL;
 921     if (path_reply) {
 922         int len = xcb_get_property_value_length(path_reply);
 923         if (len != 0) {
 924             path = strndup(xcb_get_property_value(path_reply), len);
 925         }
 926     }
 927
 928     /* Now we save the font-infos */
 929     font_info = xcb_query_font_reply(xcb_connection,
 930                                      query_font_cookie,
 931                                      NULL);
 932
 933     if (xcb_request_failed(open_font_cookie, "Could not open font")) {
 934         exit(EXIT_FAILURE);
 935     }
 936
 937     font_height = font_info->font_ascent + font_info->font_descent;
 938
 939     if (xcb_query_font_char_infos_length(font_info) == 0) {
 940         font_table = NULL;
 941     } else {
 942         font_table = xcb_query_font_char_infos(font_info);
 943     }
 944
 945     DLOG("Calculated Font-height: %d\n", font_height);
 946
 947     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 948         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 949         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 950         exit(EXIT_FAILURE);
 951     }
 952
 953     return path;
 954 }
 955
 956 /*
 957  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 958  * for the X11 display we are running on, then acquiring the selection for this
 959  * atom. Afterwards, tray clients will send ClientMessages to our window.
 960  *
 961  */
 962 void init_tray() {
 963     /* request the tray manager atom for the X11 display we are running on */
 964     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 965     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 966     xcb_intern_atom_cookie_t tray_cookie;
 967     xcb_intern_atom_reply_t *tray_reply;
 968     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 969
 970     /* tray support: we need a window to own the selection */
 971     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 972     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 973     uint32_t selval[] = { 1 };
 974     xcb_create_window(xcb_connection,
 975                       xcb_screen->root_depth,
 976                       selwin,
 977                       xcb_root,
 978                       -1, -1,
 979                       1, 1,
 980                       1,
 981                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 982                       xcb_screen->root_visual,
 983                       selmask,
 984                       selval);
 985
 986     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 987     /* set the atoms */
 988     xcb_change_property(xcb_connection,
 989                         XCB_PROP_MODE_REPLACE,
 990                         selwin,
 991                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 992                         XCB_ATOM_CARDINAL,
 993                         32,
 994                         1,
 995                         &orientation);
 996
 997     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
 998         ELOG("Could not get atom %s\n", atomname);
 999         exit(EXIT_FAILURE);
1000     }
1001
1002     xcb_set_selection_owner(xcb_connection,
1003                             selwin,
1004                             tray_reply->atom,
1005                             XCB_CURRENT_TIME);
1006
1007     /* Verify that we have the selection */
1008     xcb_get_selection_owner_cookie_t selcookie;
1009     xcb_get_selection_owner_reply_t *selreply;
1010
1011     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1012     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1013         ELOG("Could not get selection owner for %s\n", atomname);
1014         exit(EXIT_FAILURE);
1015     }
1016
1017     if (selreply->owner != selwin) {
1018         ELOG("Could not set the %s selection. " \
1019              "Maybe another tray is already running?\n", atomname);
1020         /* NOTE that this error is not fatal. We just can’t provide tray
1021          * functionality */
1022         free(selreply);
1023         return;
1024     }
1025
1026     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
1027     void *event = calloc(32, 1);
1028     xcb_client_message_event_t *ev = event;
1029     ev->response_type = XCB_CLIENT_MESSAGE;
1030     ev->window = xcb_root;
1031     ev->type = atoms[MANAGER];
1032     ev->format = 32;
1033     ev->data.data32[0] = XCB_CURRENT_TIME;
1034     ev->data.data32[1] = tray_reply->atom;
1035     ev->data.data32[2] = selwin;
1036     xcb_send_event(xcb_connection,
1037                    0,
1038                    xcb_root,
1039                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
1040                    (char*)ev);
1041     free(event);
1042     free(tray_reply);
1043 }
1044
1045 /*
1046  * Cleanup the xcb-stuff.
1047  * Called once, before the program terminates.
1048  *
1049  */
1050 void clean_xcb() {
1051     i3_output *o_walk;
1052     trayclient *trayclient;
1053     free_workspaces();
1054     SLIST_FOREACH(o_walk, outputs, slist) {
1055         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
1056             /* Unmap, then reparent (to root) the tray client windows */
1057             xcb_unmap_window(xcb_connection, trayclient->win);
1058             xcb_reparent_window(xcb_connection,
1059                                 trayclient->win,
1060                                 xcb_root,
1061                                 0,
1062                                 0);
1063         }
1064         destroy_window(o_walk);
1065         FREE(o_walk->trayclients);
1066         FREE(o_walk->workspaces);
1067         FREE(o_walk->name);
1068     }
1069     FREE_SLIST(outputs, i3_output);
1070     FREE(outputs);
1071
1072     xcb_flush(xcb_connection);
1073     xcb_disconnect(xcb_connection);
1074
1075     ev_check_stop(main_loop, xcb_chk);
1076     ev_prepare_stop(main_loop, xcb_prep);
1077     ev_io_stop(main_loop, xcb_io);
1078
1079     FREE(xcb_chk);
1080     FREE(xcb_prep);
1081     FREE(xcb_io);
1082     FREE(font_info);
1083 }
1084
1085 /*
1086  * Get the earlier requested atoms and save them in the prepared data structure
1087  *
1088  */
1089 void get_atoms() {
1090     xcb_intern_atom_reply_t *reply;
1091     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1092         if (reply == NULL) { \
1093             ELOG("Could not get atom %s\n", #name); \
1094             exit(EXIT_FAILURE); \
1095         } \
1096         atoms[name] = reply->atom; \
1097         free(reply);
1098
1099     #include "xcb_atoms.def"
1100     DLOG("Got Atoms\n");
1101 }
1102
1103 /*
1104  * Destroy the bar of the specified output
1105  *
1106  */
1107 void destroy_window(i3_output *output) {
1108     if (output == NULL) {
1109         return;
1110     }
1111     if (output->bar == XCB_NONE) {
1112         return;
1113     }
1114     xcb_destroy_window(xcb_connection, output->bar);
1115     output->bar = XCB_NONE;
1116 }
1117
1118 /*
1119  * Reallocate the statusline-buffer
1120  *
1121  */
1122 void realloc_sl_buffer() {
1123     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1124          statusline_width, xcb_screen->width_in_pixels);
1125     xcb_free_pixmap(xcb_connection, statusline_pm);
1126     statusline_pm = xcb_generate_id(xcb_connection);
1127     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1128                                                                xcb_screen->root_depth,
1129                                                                statusline_pm,
1130                                                                xcb_root,
1131                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1132                                                                xcb_screen->height_in_pixels);
1133
1134     uint32_t mask = XCB_GC_FOREGROUND;
1135     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
1136     xcb_free_gc(xcb_connection, statusline_clear);
1137     statusline_clear = xcb_generate_id(xcb_connection);
1138     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1139                                                                statusline_clear,
1140                                                                xcb_root,
1141                                                                mask,
1142                                                                vals);
1143
1144     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
1145     vals[0] = colors.bar_fg;
1146     statusline_ctx = xcb_generate_id(xcb_connection);
1147     xcb_free_gc(xcb_connection, statusline_ctx);
1148     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1149                                                             statusline_ctx,
1150                                                             xcb_root,
1151                                                             mask,
1152                                                             vals);
1153
1154     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1155         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1156         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1157         exit(EXIT_FAILURE);
1158     }
1159
1160 }
1161
1162 /*
1163  * Reconfigure all bars and create new bars for recently activated outputs
1164  *
1165  */
1166 void reconfig_windows() {
1167     uint32_t mask;
1168     uint32_t values[5];
1169
1170     i3_output *walk;
1171     SLIST_FOREACH(walk, outputs, slist) {
1172         if (!walk->active) {
1173             /* If an output is not active, we destroy its bar */
1174             /* FIXME: Maybe we rather want to unmap? */
1175             DLOG("Destroying window for output %s\n", walk->name);
1176             destroy_window(walk);
1177             continue;
1178         }
1179         if (walk->bar == XCB_NONE) {
1180             DLOG("Creating Window for output %s\n", walk->name);
1181
1182             /* TODO: only call init_tray() if the tray is configured for this output */
1183             init_tray();
1184
1185             walk->bar = xcb_generate_id(xcb_connection);
1186             walk->buffer = xcb_generate_id(xcb_connection);
1187             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1188             /* Black background */
1189             values[0] = colors.bar_bg;
1190             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1191             values[1] = config.hide_on_modifier;
1192             /* We enable the following EventMask fields:
1193              * EXPOSURE, to get expose events (we have to re-draw then)
1194              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1195              *                        child windows use ConfigureWindow
1196              * BUTTON_PRESS, to handle clicks on the workspace buttons
1197              * */
1198             values[2] = XCB_EVENT_MASK_EXPOSURE |
1199                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1200             if (!config.disable_ws) {
1201                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1202             }
1203             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1204                                                                      xcb_screen->root_depth,
1205                                                                      walk->bar,
1206                                                                      xcb_root,
1207                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
1208                                                                      walk->rect.w, font_height + 6,
1209                                                                      1,
1210                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1211                                                                      xcb_screen->root_visual,
1212                                                                      mask,
1213                                                                      values);
1214
1215             /* The double-buffer we use to render stuff off-screen */
1216             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1217                                                                     xcb_screen->root_depth,
1218                                                                     walk->buffer,
1219                                                                     walk->bar,
1220                                                                     walk->rect.w,
1221                                                                     walk->rect.h);
1222
1223             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1224              * this one */
1225             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1226                                                                 XCB_PROP_MODE_REPLACE,
1227                                                                 walk->bar,
1228                                                                 atoms[_NET_WM_WINDOW_TYPE],
1229                                                                 XCB_ATOM_ATOM,
1230                                                                 32,
1231                                                                 1,
1232                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1233
1234             /* We need to tell i3, where to reserve space for i3bar */
1235             /* left, right, top, bottom, left_start_y, left_end_y,
1236              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1237              * bottom_end_x */
1238             /* A local struct to save the strut_partial property */
1239             struct {
1240                 uint32_t left;
1241                 uint32_t right;
1242                 uint32_t top;
1243                 uint32_t bottom;
1244                 uint32_t left_start_y;
1245                 uint32_t left_end_y;
1246                 uint32_t right_start_y;
1247                 uint32_t right_end_y;
1248                 uint32_t top_start_x;
1249                 uint32_t top_end_x;
1250                 uint32_t bottom_start_x;
1251                 uint32_t bottom_end_x;
1252             } __attribute__((__packed__)) strut_partial = {0,};
1253             switch (config.dockpos) {
1254                 case DOCKPOS_NONE:
1255                     break;
1256                 case DOCKPOS_TOP:
1257                     strut_partial.top = font_height + 6;
1258                     strut_partial.top_start_x = walk->rect.x;
1259                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1260                     break;
1261                 case DOCKPOS_BOT:
1262                     strut_partial.bottom = font_height + 6;
1263                     strut_partial.bottom_start_x = walk->rect.x;
1264                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1265                     break;
1266             }
1267             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1268                                                                  XCB_PROP_MODE_REPLACE,
1269                                                                  walk->bar,
1270                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1271                                                                  XCB_ATOM_CARDINAL,
1272                                                                  32,
1273                                                                  12,
1274                                                                  &strut_partial);
1275
1276             /* We also want a graphics-context for the bars (it defines the properties
1277              * with which we draw to them) */
1278             walk->bargc = xcb_generate_id(xcb_connection);
1279             mask = XCB_GC_FONT;
1280             values[0] = xcb_font;
1281             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1282                                                                 walk->bargc,
1283                                                                 walk->bar,
1284                                                                 mask,
1285                                                                 values);
1286
1287             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1288             xcb_void_cookie_t map_cookie;
1289             if (!config.hide_on_modifier) {
1290                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1291             }
1292
1293             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1294                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1295                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1296                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1297                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1298                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1299                 exit(EXIT_FAILURE);
1300             }
1301         } else {
1302             /* We already have a bar, so we just reconfigure it */
1303             mask = XCB_CONFIG_WINDOW_X |
1304                    XCB_CONFIG_WINDOW_Y |
1305                    XCB_CONFIG_WINDOW_WIDTH |
1306                    XCB_CONFIG_WINDOW_HEIGHT |
1307                    XCB_CONFIG_WINDOW_STACK_MODE;
1308             values[0] = walk->rect.x;
1309             values[1] = walk->rect.y + walk->rect.h - font_height - 6;
1310             values[2] = walk->rect.w;
1311             values[3] = font_height + 6;
1312             values[4] = XCB_STACK_MODE_ABOVE;
1313
1314             DLOG("Destroying buffer for output %s", walk->name);
1315             xcb_free_pixmap(xcb_connection, walk->buffer);
1316
1317             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1318             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1319                                                                         walk->bar,
1320                                                                         mask,
1321                                                                         values);
1322
1323             DLOG("Recreating buffer for output %s", walk->name);
1324             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1325                                                                     xcb_screen->root_depth,
1326                                                                     walk->buffer,
1327                                                                     walk->bar,
1328                                                                     walk->rect.w,
1329                                                                     walk->rect.h);
1330
1331             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1332                 exit(EXIT_FAILURE);
1333             }
1334             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1335                 exit(EXIT_FAILURE);
1336             }
1337         }
1338     }
1339 }
1340
1341 /*
1342  * Render the bars, with buttons and statusline
1343  *
1344  */
1345 void draw_bars() {
1346     DLOG("Drawing Bars...\n");
1347     int i = 0;
1348
1349     refresh_statusline();
1350
1351     i3_output *outputs_walk;
1352     SLIST_FOREACH(outputs_walk, outputs, slist) {
1353         if (!outputs_walk->active) {
1354             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1355             continue;
1356         }
1357         if (outputs_walk->bar == XCB_NONE) {
1358             /* Oh shit, an active output without an own bar. Create it now! */
1359             reconfig_windows();
1360         }
1361         /* First things first: clear the backbuffer */
1362         uint32_t color = colors.bar_bg;
1363         xcb_change_gc(xcb_connection,
1364                       outputs_walk->bargc,
1365                       XCB_GC_FOREGROUND,
1366                       &color);
1367         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
1368         xcb_poly_fill_rectangle(xcb_connection,
1369                                 outputs_walk->buffer,
1370                                 outputs_walk->bargc,
1371                                 1,
1372                                 &rect);
1373
1374         if (statusline != NULL) {
1375             DLOG("Printing statusline!\n");
1376
1377             /* Luckily we already prepared a seperate pixmap containing the rendered
1378              * statusline, we just have to copy the relevant parts to the relevant
1379              * position */
1380             trayclient *trayclient;
1381             int traypx = 0;
1382             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1383                 if (!trayclient->mapped)
1384                     continue;
1385                 /* We assume the tray icons are quadratic (we use the font
1386                  * *height* as *width* of the icons) because we configured them
1387                  * like this. */
1388                 traypx += font_height;
1389             }
1390             /* Add 2px of padding if there are any tray icons */
1391             if (traypx > 0)
1392                 traypx += 2;
1393             xcb_copy_area(xcb_connection,
1394                           statusline_pm,
1395                           outputs_walk->buffer,
1396                           outputs_walk->bargc,
1397                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1398                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1399                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
1400         }
1401
1402         if (config.disable_ws) {
1403             continue;
1404         }
1405
1406         i3_ws *ws_walk;
1407         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1408             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1409             uint32_t fg_color = colors.inactive_ws_fg;
1410             uint32_t bg_color = colors.inactive_ws_bg;
1411             if (ws_walk->visible) {
1412                 if (!ws_walk->focused) {
1413                     fg_color = colors.active_ws_fg;
1414                     bg_color = colors.active_ws_bg;
1415                 } else {
1416                     fg_color = colors.focus_ws_fg;
1417                     bg_color = colors.focus_ws_bg;
1418                 }
1419             }
1420             if (ws_walk->urgent) {
1421                 DLOG("WS %s is urgent!\n", ws_walk->name);
1422                 fg_color = colors.urgent_ws_fg;
1423                 bg_color = colors.urgent_ws_bg;
1424                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1425                 unhide_bars();
1426             }
1427             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1428             uint32_t vals[] = { bg_color, bg_color };
1429             xcb_change_gc(xcb_connection,
1430                           outputs_walk->bargc,
1431                           mask,
1432                           vals);
1433             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
1434             xcb_poly_fill_rectangle(xcb_connection,
1435                                     outputs_walk->buffer,
1436                                     outputs_walk->bargc,
1437                                     1,
1438                                     &rect);
1439             xcb_change_gc(xcb_connection,
1440                           outputs_walk->bargc,
1441                           XCB_GC_FOREGROUND,
1442                           &fg_color);
1443             xcb_image_text_16(xcb_connection,
1444                               ws_walk->name_glyphs,
1445                               outputs_walk->buffer,
1446                               outputs_walk->bargc,
1447                               i + 5, font_info->font_ascent + 2,
1448                               ws_walk->ucs2_name);
1449             i += 10 + ws_walk->name_width;
1450         }
1451
1452         i = 0;
1453     }
1454
1455     redraw_bars();
1456 }
1457
1458 /*
1459  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1460  *
1461  */
1462 void redraw_bars() {
1463     i3_output *outputs_walk;
1464     SLIST_FOREACH(outputs_walk, outputs, slist) {
1465         if (!outputs_walk->active) {
1466             continue;
1467         }
1468         xcb_copy_area(xcb_connection,
1469                       outputs_walk->buffer,
1470                       outputs_walk->bar,
1471                       outputs_walk->bargc,
1472                       0, 0,
1473                       0, 0,
1474                       outputs_walk->rect.w,
1475                       outputs_walk->rect.h);
1476         xcb_flush(xcb_connection);
1477     }
1478 }