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

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2011 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_atom.h>
  13
  14 #ifdef XCB_COMPAT
  15 #include "xcb_compat.h"
  16 #endif
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <string.h>
  23 #include <i3/ipc.h>
  24 #include <ev.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27 #include <err.h>
  28
  29 #include <X11/Xlib.h>
  30 #include <X11/XKBlib.h>
  31 #include <X11/extensions/XKB.h>
  32
  33 #include "common.h"
  34 #include "libi3.h"
  35
  36 /* We save the Atoms in an easy to access array, indexed by an enum */
  37 enum {
  38     #define ATOM_DO(name) name,
  39     #include "xcb_atoms.def"
  40     NUM_ATOMS
  41 };
  42
  43 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  44 xcb_atom_t               atoms[NUM_ATOMS];
  45
  46 /* Variables, that are the same for all functions at all times */
  47 xcb_connection_t *xcb_connection;
  48 int              screen;
  49 xcb_screen_t     *xcb_screen;
  50 xcb_window_t     xcb_root;
  51 xcb_font_t       xcb_font;
  52
  53 /* We need to cache some data to speed up text-width-prediction */
  54 xcb_query_font_reply_t *font_info;
  55 int                    font_height;
  56 xcb_charinfo_t         *font_table;
  57
  58 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  59 Display          *xkb_dpy;
  60 int              xkb_event_base;
  61 int              mod_pressed = 0;
  62
  63 /* Because the statusline is the same on all outputs, we have
  64  * global buffer to render it on */
  65 xcb_gcontext_t   statusline_ctx;
  66 xcb_gcontext_t   statusline_clear;
  67 xcb_pixmap_t     statusline_pm;
  68 uint32_t         statusline_width;
  69
  70 /* Event-Watchers, to interact with the user */
  71 ev_prepare *xcb_prep;
  72 ev_check   *xcb_chk;
  73 ev_io      *xcb_io;
  74 ev_io      *xkb_io;
  75
  76 /* The parsed colors */
  77 struct xcb_colors_t {
  78     uint32_t bar_fg;
  79     uint32_t bar_bg;
  80     uint32_t active_ws_fg;
  81     uint32_t active_ws_bg;
  82     uint32_t inactive_ws_fg;
  83     uint32_t inactive_ws_bg;
  84     uint32_t urgent_ws_bg;
  85     uint32_t urgent_ws_fg;
  86     uint32_t focus_ws_bg;
  87     uint32_t focus_ws_fg;
  88 };
  89 struct xcb_colors_t colors;
  90
  91 /* We define xcb_request_failed as a macro to include the relevant line-number */
  92 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
  93 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
  94     xcb_generic_error_t *err;
  95     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
  96         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
  97         return err->error_code;
  98     }
  99     return 0;
 100 }
 101
 102 /*
 103  * Predicts the length of text based on cached data.
 104  * The string has to be encoded in ucs2 and glyph_len has to be the length
 105  * of the string (in glyphs).
 106  *
 107  */
 108 uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
 109     /* If we don't have per-character data, return the maximum width */
 110     if (font_table == NULL) {
 111         return (font_info->max_bounds.character_width * length);
 112     }
 113
 114     uint32_t width = 0;
 115     uint32_t i;
 116
 117     for (i = 0; i < length; i++) {
 118         xcb_charinfo_t *info;
 119         int row = text[i].byte1;
 120         int col = text[i].byte2;
 121
 122         if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
 123             col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2) {
 124             continue;
 125         }
 126
 127         /* Don't you ask me, how this one works… */
 128         info = &font_table[((row - font_info->min_byte1) *
 129                             (font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
 130                            (col - font_info->min_char_or_byte2)];
 131
 132         if (info->character_width != 0 ||
 133             (info->right_side_bearing |
 134              info->left_side_bearing |
 135              info->ascent |
 136              info->descent) != 0) {
 137             width += info->character_width;
 138         }
 139     }
 140
 141     return width;
 142 }
 143
 144 /*
 145  * Draws text given in UCS-2-encoding to a given drawable and position
 146  *
 147  */
 148 void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
 149                xcb_char2b_t *text, uint32_t glyph_count) {
 150     int offset = 0;
 151     int16_t pos_x = x;
 152     int16_t font_ascent = font_info->font_ascent;
 153
 154     while (glyph_count > 0) {
 155         uint8_t chunk_size = MIN(255, glyph_count);
 156         uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
 157
 158         xcb_image_text_16(xcb_connection,
 159                           chunk_size,
 160                           drawable,
 161                           ctx,
 162                           pos_x, y + font_ascent,
 163                           text + offset);
 164
 165         offset += chunk_size;
 166         pos_x += chunk_width;
 167         glyph_count -= chunk_size;
 168     }
 169 }
 170
 171 /*
 172  * Redraws the statusline to the buffer
 173  *
 174  */
 175 void refresh_statusline() {
 176     int glyph_count;
 177
 178     if (statusline == NULL) {
 179         return;
 180     }
 181
 182     xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
 183     uint32_t old_statusline_width = statusline_width;
 184     statusline_width = predict_text_extents(text, glyph_count);
 185     /* If the statusline is bigger than our screen we need to make sure that
 186      * the pixmap provides enough space, so re-allocate if the width grew */
 187     if (statusline_width > xcb_screen->width_in_pixels &&
 188         statusline_width > old_statusline_width)
 189         realloc_sl_buffer();
 190
 191     xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
 192     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 193     draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
 194
 195     FREE(text);
 196 }
 197
 198 /*
 199  * Hides all bars (unmaps them)
 200  *
 201  */
 202 void hide_bars() {
 203     if (!config.hide_on_modifier) {
 204         return;
 205     }
 206
 207     i3_output *walk;
 208     SLIST_FOREACH(walk, outputs, slist) {
 209         if (!walk->active) {
 210             continue;
 211         }
 212         xcb_unmap_window(xcb_connection, walk->bar);
 213     }
 214     stop_child();
 215 }
 216
 217 /*
 218  * Unhides all bars (maps them)
 219  *
 220  */
 221 void unhide_bars() {
 222     if (!config.hide_on_modifier) {
 223         return;
 224     }
 225
 226     i3_output           *walk;
 227     xcb_void_cookie_t   cookie;
 228     uint32_t            mask;
 229     uint32_t            values[5];
 230
 231     cont_child();
 232
 233     SLIST_FOREACH(walk, outputs, slist) {
 234         if (walk->bar == XCB_NONE) {
 235             continue;
 236         }
 237         mask = XCB_CONFIG_WINDOW_X |
 238                XCB_CONFIG_WINDOW_Y |
 239                XCB_CONFIG_WINDOW_WIDTH |
 240                XCB_CONFIG_WINDOW_HEIGHT |
 241                XCB_CONFIG_WINDOW_STACK_MODE;
 242         values[0] = walk->rect.x;
 243         if (config.position == POS_TOP)
 244             values[1] = walk->rect.y;
 245         else values[1] = walk->rect.y + walk->rect.h - font_height - 6;
 246         values[2] = walk->rect.w;
 247         values[3] = font_height + 6;
 248         values[4] = XCB_STACK_MODE_ABOVE;
 249         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 250         cookie = xcb_configure_window_checked(xcb_connection,
 251                                               walk->bar,
 252                                               mask,
 253                                               values);
 254
 255         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 256             exit(EXIT_FAILURE);
 257         }
 258         xcb_map_window(xcb_connection, walk->bar);
 259     }
 260 }
 261
 262 /*
 263  * Parse the colors into a format that we can use
 264  *
 265  */
 266 void init_colors(const struct xcb_color_strings_t *new_colors) {
 267 #define PARSE_COLOR(name, def) \
 268     do { \
 269         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 270     } while  (0)
 271     PARSE_COLOR(bar_fg, "#FFFFFF");
 272     PARSE_COLOR(bar_bg, "#000000");
 273     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 274     PARSE_COLOR(active_ws_bg, "#333333");
 275     PARSE_COLOR(inactive_ws_fg, "#888888");
 276     PARSE_COLOR(inactive_ws_bg, "#222222");
 277     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 278     PARSE_COLOR(urgent_ws_bg, "#900000");
 279     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 280     PARSE_COLOR(focus_ws_bg, "#285577");
 281 #undef PARSE_COLOR
 282 }
 283
 284 /*
 285  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 286  * We determine, whether the click occured on a ws-button or if the scroll-
 287  * wheel was used and change the workspace appropriately
 288  *
 289  */
 290 void handle_button(xcb_button_press_event_t *event) {
 291     i3_ws *cur_ws;
 292
 293     /* Determine, which bar was clicked */
 294     i3_output *walk;
 295     xcb_window_t bar = event->event;
 296     SLIST_FOREACH(walk, outputs, slist) {
 297         if (walk->bar == bar) {
 298             break;
 299         }
 300     }
 301
 302     if (walk == NULL) {
 303         DLOG("Unknown Bar klicked!\n");
 304         return;
 305     }
 306
 307     /* TODO: Move this to extern get_ws_for_output() */
 308     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 309         if (cur_ws->visible) {
 310             break;
 311         }
 312     }
 313
 314     if (cur_ws == NULL) {
 315         DLOG("No Workspace active?\n");
 316         return;
 317     }
 318
 319     int32_t x = event->event_x;
 320
 321     DLOG("Got Button %d\n", event->detail);
 322
 323     switch (event->detail) {
 324         case 1:
 325             /* Left Mousbutton. We determine, which button was clicked
 326              * and set cur_ws accordingly */
 327             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 328                 DLOG("x = %d\n", x);
 329                 if (x < cur_ws->name_width + 10) {
 330                     break;
 331                 }
 332                 x -= cur_ws->name_width + 10;
 333             }
 334             if (cur_ws == NULL) {
 335                 return;
 336             }
 337             break;
 338         case 4:
 339             /* Mouse wheel down. We select the next ws */
 340             if (cur_ws == TAILQ_FIRST(walk->workspaces)) {
 341                 cur_ws = TAILQ_LAST(walk->workspaces, ws_head);
 342             } else {
 343                 cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 344             }
 345             break;
 346         case 5:
 347             /* Mouse wheel up. We select the previos ws */
 348             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head)) {
 349                 cur_ws = TAILQ_FIRST(walk->workspaces);
 350             } else {
 351                 cur_ws = TAILQ_NEXT(cur_ws, tailq);
 352             }
 353             break;
 354     }
 355
 356     const size_t len = strlen(cur_ws->name) + strlen("workspace \"\"") + 1;
 357     char buffer[len];
 358     snprintf(buffer, len, "workspace \"%s\"", cur_ws->name);
 359     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 360 }
 361
 362 /*
 363  * Configures the x coordinate of all trayclients. To be called after adding a
 364  * new tray client or removing an old one.
 365  *
 366  */
 367 static void configure_trayclients() {
 368     trayclient *trayclient;
 369     i3_output *output;
 370     SLIST_FOREACH(output, outputs, slist) {
 371         if (!output->active)
 372             continue;
 373
 374         int clients = 0;
 375         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 376             if (!trayclient->mapped)
 377                 continue;
 378             clients++;
 379
 380             DLOG("Configuring tray window %08x to x=%d\n",
 381                  trayclient->win, output->rect.w - (clients * (font_height + 2)));
 382             uint32_t x = output->rect.w - (clients * (font_height + 2));
 383             xcb_configure_window(xcb_connection,
 384                                  trayclient->win,
 385                                  XCB_CONFIG_WINDOW_X,
 386                                  &x);
 387         }
 388     }
 389 }
 390
 391 /*
 392  * Handles ClientMessages (messages sent from another client directly to us).
 393  *
 394  * At the moment, only the tray window will receive client messages. All
 395  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 396  *
 397  */
 398 static void handle_client_message(xcb_client_message_event_t* event) {
 399     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 400         event->format == 32) {
 401         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 402         /* event->data.data32[0] is the timestamp */
 403         uint32_t op = event->data.data32[1];
 404         uint32_t mask;
 405         uint32_t values[2];
 406         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 407             xcb_window_t client = event->data.data32[2];
 408
 409             /* Listen for PropertyNotify events to get the most recent value of
 410              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 411             mask = XCB_CW_EVENT_MASK;
 412             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 413                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 414             xcb_change_window_attributes(xcb_connection,
 415                                          client,
 416                                          mask,
 417                                          values);
 418
 419             /* Request the _XEMBED_INFO property. The XEMBED specification
 420              * (which is referred by the tray specification) says this *has* to
 421              * be set, but VLC does not set it… */
 422             bool map_it = true;
 423             int xe_version = 1;
 424             xcb_get_property_cookie_t xembedc;
 425             xembedc = xcb_get_property_unchecked(xcb_connection,
 426                                                  0,
 427                                                  client,
 428                                                  atoms[_XEMBED_INFO],
 429                                                  XCB_GET_PROPERTY_TYPE_ANY,
 430                                                  0,
 431                                                  2 * 32);
 432
 433             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 434                                                                        xembedc,
 435                                                                        NULL);
 436             if (xembedr != NULL && xembedr->length != 0) {
 437                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 438                 uint32_t *xembed = xcb_get_property_value(xembedr);
 439                 DLOG("xembed version = %d\n", xembed[0]);
 440                 DLOG("xembed flags = %d\n", xembed[1]);
 441                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 442                 xe_version = xembed[0];
 443                 if (xe_version > 1)
 444                     xe_version = 1;
 445                 free(xembedr);
 446             } else {
 447                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 448             }
 449
 450             DLOG("X window %08x requested docking\n", client);
 451             i3_output *walk, *output = NULL;
 452             SLIST_FOREACH(walk, outputs, slist) {
 453                 if (!walk->active)
 454                     continue;
 455                 if (config.tray_output &&
 456                     strcasecmp(walk->name, config.tray_output) != 0)
 457                     continue;
 458                 DLOG("using output %s\n", walk->name);
 459                 output = walk;
 460             }
 461             if (output == NULL) {
 462                 ELOG("No output found\n");
 463                 return;
 464             }
 465             xcb_reparent_window(xcb_connection,
 466                                 client,
 467                                 output->bar,
 468                                 output->rect.w - font_height - 2,
 469                                 2);
 470             /* We reconfigure the window to use a reasonable size. The systray
 471              * specification explicitly says:
 472              *   Tray icons may be assigned any size by the system tray, and
 473              *   should do their best to cope with any size effectively
 474              */
 475             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 476             values[0] = font_height;
 477             values[1] = font_height;
 478             xcb_configure_window(xcb_connection,
 479                                  client,
 480                                  mask,
 481                                  values);
 482
 483             /* send the XEMBED_EMBEDDED_NOTIFY message */
 484             void *event = scalloc(32);
 485             xcb_client_message_event_t *ev = event;
 486             ev->response_type = XCB_CLIENT_MESSAGE;
 487             ev->window = client;
 488             ev->type = atoms[_XEMBED];
 489             ev->format = 32;
 490             ev->data.data32[0] = XCB_CURRENT_TIME;
 491             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 492             ev->data.data32[2] = output->bar;
 493             ev->data.data32[3] = xe_version;
 494             xcb_send_event(xcb_connection,
 495                            0,
 496                            client,
 497                            XCB_EVENT_MASK_NO_EVENT,
 498                            (char*)ev);
 499             free(event);
 500
 501             /* Put the client inside the save set. Upon termination (whether
 502              * killed or normal exit does not matter) of i3bar, these clients
 503              * will be correctly reparented to their most closest living
 504              * ancestor. Without this, tray icons might die when i3bar
 505              * exits/crashes. */
 506             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 507
 508             if (map_it) {
 509                 DLOG("Mapping dock client\n");
 510                 xcb_map_window(xcb_connection, client);
 511             } else {
 512                 DLOG("Not mapping dock client yet\n");
 513             }
 514             trayclient *tc = smalloc(sizeof(trayclient));
 515             tc->win = client;
 516             tc->mapped = map_it;
 517             tc->xe_version = xe_version;
 518             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 519
 520             /* Trigger an update to copy the statusline text to the appropriate
 521              * position */
 522             configure_trayclients();
 523             draw_bars();
 524         }
 525     }
 526 }
 527
 528 /*
 529  * Handles UnmapNotify events. These events happen when a tray window unmaps
 530  * itself. We then update our data structure
 531  *
 532  */
 533 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 534     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 535
 536     i3_output *walk;
 537     SLIST_FOREACH(walk, outputs, slist) {
 538         if (!walk->active)
 539             continue;
 540         DLOG("checking output %s\n", walk->name);
 541         trayclient *trayclient;
 542         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 543             if (trayclient->win != event->window)
 544                 continue;
 545
 546             DLOG("Removing tray client with window ID %08x\n", event->window);
 547             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 548
 549             /* Trigger an update, we now have more space for the statusline */
 550             configure_trayclients();
 551             draw_bars();
 552             return;
 553         }
 554     }
 555 }
 556
 557 /*
 558  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 559  * handled, which tells us whether a dock client should be mapped or unmapped.
 560  *
 561  */
 562 static void handle_property_notify(xcb_property_notify_event_t *event) {
 563     DLOG("PropertyNotify\n");
 564     if (event->atom == atoms[_XEMBED_INFO] &&
 565         event->state == XCB_PROPERTY_NEW_VALUE) {
 566         DLOG("xembed_info updated\n");
 567         trayclient *trayclient = NULL, *walk;
 568         i3_output *o_walk;
 569         SLIST_FOREACH(o_walk, outputs, slist) {
 570             if (!o_walk->active)
 571                 continue;
 572
 573             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 574                 if (walk->win != event->window)
 575                     continue;
 576                 trayclient = walk;
 577                 break;
 578             }
 579
 580             if (trayclient)
 581                 break;
 582         }
 583         if (!trayclient) {
 584             ELOG("PropertyNotify received for unknown window %08x\n",
 585                  event->window);
 586             return;
 587         }
 588         xcb_get_property_cookie_t xembedc;
 589         xembedc = xcb_get_property_unchecked(xcb_connection,
 590                                              0,
 591                                              trayclient->win,
 592                                              atoms[_XEMBED_INFO],
 593                                              XCB_GET_PROPERTY_TYPE_ANY,
 594                                              0,
 595                                              2 * 32);
 596
 597         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 598                                                                    xembedc,
 599                                                                    NULL);
 600         if (xembedr == NULL || xembedr->length == 0) {
 601             DLOG("xembed_info unset\n");
 602             return;
 603         }
 604
 605         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 606         uint32_t *xembed = xcb_get_property_value(xembedr);
 607         DLOG("xembed version = %d\n", xembed[0]);
 608         DLOG("xembed flags = %d\n", xembed[1]);
 609         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 610         DLOG("map-state now %d\n", map_it);
 611         if (trayclient->mapped && !map_it) {
 612             /* need to unmap the window */
 613             xcb_unmap_window(xcb_connection, trayclient->win);
 614             trayclient->mapped = map_it;
 615             configure_trayclients();
 616             draw_bars();
 617         } else if (!trayclient->mapped && map_it) {
 618             /* need to map the window */
 619             xcb_map_window(xcb_connection, trayclient->win);
 620             trayclient->mapped = map_it;
 621             configure_trayclients();
 622             draw_bars();
 623         }
 624         free(xembedr);
 625     }
 626 }
 627
 628 /*
 629  * Handle ConfigureRequests by denying them and sending the client a
 630  * ConfigureNotify with its actual size.
 631  *
 632  */
 633 static void handle_configure_request(xcb_configure_request_event_t *event) {
 634     DLOG("ConfigureRequest for window = %08x\n", event->window);
 635
 636     trayclient *trayclient;
 637     i3_output *output;
 638     SLIST_FOREACH(output, outputs, slist) {
 639         if (!output->active)
 640             continue;
 641
 642         int clients = 0;
 643         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 644             if (!trayclient->mapped)
 645                 continue;
 646             clients++;
 647
 648             if (trayclient->win != event->window)
 649                 continue;
 650
 651             xcb_rectangle_t rect;
 652             rect.x = output->rect.w - (clients * (font_height + 2));
 653             rect.y = 2;
 654             rect.width = font_height;
 655             rect.height = font_height;
 656
 657             DLOG("This is a tray window. x = %d\n", rect.x);
 658             fake_configure_notify(xcb_connection, rect, event->window, 0);
 659             return;
 660         }
 661     }
 662
 663     DLOG("WARNING: Could not find corresponding tray window.\n");
 664 }
 665
 666 /*
 667  * This function is called immediately before the main loop locks. We flush xcb
 668  * then (and only then)
 669  *
 670  */
 671 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 672     xcb_flush(xcb_connection);
 673 }
 674
 675 /*
 676  * This function is called immediately after the main loop locks, so when one
 677  * of the watchers registered an event.
 678  * We check whether an X-Event arrived and handle it.
 679  *
 680  */
 681 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 682     xcb_generic_event_t *event;
 683
 684     if (xcb_connection_has_error(xcb_connection)) {
 685         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 686         exit(1);
 687     }
 688
 689     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 690         switch (event->response_type & ~0x80) {
 691             case XCB_EXPOSE:
 692                 /* Expose-events happen, when the window needs to be redrawn */
 693                 redraw_bars();
 694                 break;
 695             case XCB_BUTTON_PRESS:
 696                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 697                 handle_button((xcb_button_press_event_t*) event);
 698                 break;
 699             case XCB_CLIENT_MESSAGE:
 700                 /* Client messages are used for client-to-client communication, for
 701                  * example system tray widgets talk to us directly via client messages. */
 702                 handle_client_message((xcb_client_message_event_t*) event);
 703                 break;
 704             case XCB_UNMAP_NOTIFY:
 705             case XCB_DESTROY_NOTIFY:
 706                 /* UnmapNotifies are received when a tray window unmaps itself */
 707                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 708                 break;
 709             case XCB_PROPERTY_NOTIFY:
 710                 /* PropertyNotify */
 711                 handle_property_notify((xcb_property_notify_event_t*) event);
 712                 break;
 713             case XCB_CONFIGURE_REQUEST:
 714                 /* ConfigureRequest, sent by a tray child */
 715                 handle_configure_request((xcb_configure_request_event_t*) event);
 716                 break;
 717         }
 718         free(event);
 719     }
 720 }
 721
 722 /*
 723  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 724  * are triggered
 725  *
 726  */
 727 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 728 }
 729
 730 /*
 731  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 732  *
 733  */
 734 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 735     XkbEvent ev;
 736     int modstate = 0;
 737
 738     DLOG("Got XKB-Event!\n");
 739
 740     while (XPending(xkb_dpy)) {
 741         XNextEvent(xkb_dpy, (XEvent*)&ev);
 742
 743         if (ev.type != xkb_event_base) {
 744             ELOG("No Xkb-Event!\n");
 745             continue;
 746         }
 747
 748         if (ev.any.xkb_type != XkbStateNotify) {
 749             ELOG("No State Notify!\n");
 750             continue;
 751         }
 752
 753         unsigned int mods = ev.state.mods;
 754         modstate = mods & Mod4Mask;
 755     }
 756
 757     if (modstate != mod_pressed) {
 758         if (modstate == 0) {
 759             DLOG("Mod4 got released!\n");
 760             hide_bars();
 761         } else {
 762             DLOG("Mod4 got pressed!\n");
 763             unhide_bars();
 764         }
 765         mod_pressed = modstate;
 766     }
 767 }
 768
 769 /*
 770  * Early initialization of the connection to X11: Everything which does not
 771  * depend on 'config'.
 772  *
 773  */
 774 char *init_xcb_early() {
 775     /* FIXME: xcb_connect leaks Memory */
 776     xcb_connection = xcb_connect(NULL, &screen);
 777     if (xcb_connection_has_error(xcb_connection)) {
 778         ELOG("Cannot open display\n");
 779         exit(EXIT_FAILURE);
 780     }
 781     DLOG("Connected to xcb\n");
 782
 783     /* We have to request the atoms we need */
 784     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 785     #include "xcb_atoms.def"
 786
 787     xcb_screen = xcb_setup_roots_iterator(xcb_get_setup(xcb_connection)).data;
 788     xcb_root = xcb_screen->root;
 789
 790     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 791      * this way, we can choose to crop it */
 792     uint32_t mask = XCB_GC_FOREGROUND;
 793     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 794
 795     statusline_clear = xcb_generate_id(xcb_connection);
 796     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 797                                                                statusline_clear,
 798                                                                xcb_root,
 799                                                                mask,
 800                                                                vals);
 801
 802     mask |= XCB_GC_BACKGROUND;
 803     vals[0] = colors.bar_fg;
 804     statusline_ctx = xcb_generate_id(xcb_connection);
 805     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 806                                                             statusline_ctx,
 807                                                             xcb_root,
 808                                                             mask,
 809                                                             vals);
 810
 811     statusline_pm = xcb_generate_id(xcb_connection);
 812     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 813                                                                xcb_screen->root_depth,
 814                                                                statusline_pm,
 815                                                                xcb_root,
 816                                                                xcb_screen->width_in_pixels,
 817                                                                xcb_screen->height_in_pixels);
 818
 819
 820     /* The various Watchers to communicate with xcb */
 821     xcb_io = smalloc(sizeof(ev_io));
 822     xcb_prep = smalloc(sizeof(ev_prepare));
 823     xcb_chk = smalloc(sizeof(ev_check));
 824
 825     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 826     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 827     ev_check_init(xcb_chk, &xcb_chk_cb);
 828
 829     ev_io_start(main_loop, xcb_io);
 830     ev_prepare_start(main_loop, xcb_prep);
 831     ev_check_start(main_loop, xcb_chk);
 832
 833     /* Now we get the atoms and save them in a nice data structure */
 834     get_atoms();
 835
 836     xcb_get_property_cookie_t path_cookie;
 837     path_cookie = xcb_get_property_unchecked(xcb_connection,
 838                                    0,
 839                                    xcb_root,
 840                                    atoms[I3_SOCKET_PATH],
 841                                    XCB_GET_PROPERTY_TYPE_ANY,
 842                                    0, PATH_MAX);
 843
 844     /* We check, if i3 set its socket-path */
 845     xcb_get_property_reply_t *path_reply = xcb_get_property_reply(xcb_connection,
 846                                                                   path_cookie,
 847                                                                   NULL);
 848     char *path = NULL;
 849     if (path_reply) {
 850         int len = xcb_get_property_value_length(path_reply);
 851         if (len != 0) {
 852             path = strndup(xcb_get_property_value(path_reply), len);
 853         }
 854     }
 855
 856
 857     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 858         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 859         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 860         exit(EXIT_FAILURE);
 861     }
 862
 863     return path;
 864 }
 865
 866 /*
 867  * Initialization which depends on 'config' being usable. Called after the
 868  * configuration has arrived.
 869  *
 870  */
 871 void init_xcb_late(char *fontname) {
 872     if (fontname == NULL) {
 873         /* XXX: font fallback to 'misc' like i3 does it would be good. */
 874         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
 875     }
 876
 877     /* We load and allocate the font */
 878     xcb_font = xcb_generate_id(xcb_connection);
 879     xcb_void_cookie_t open_font_cookie;
 880     open_font_cookie = xcb_open_font_checked(xcb_connection,
 881                                              xcb_font,
 882                                              strlen(fontname),
 883                                              fontname);
 884
 885     /* We need to save info about the font, because we need the font's height and
 886      * information about the width of characters */
 887     xcb_query_font_cookie_t query_font_cookie;
 888     query_font_cookie = xcb_query_font(xcb_connection,
 889                                        xcb_font);
 890
 891     xcb_change_gc(xcb_connection,
 892                   statusline_ctx,
 893                   XCB_GC_FONT,
 894                   (uint32_t[]){ xcb_font });
 895
 896     xcb_flush(xcb_connection);
 897
 898     /* To grab modifiers without blocking other applications from receiving key-events
 899      * involving that modifier, we sadly have to use xkb which is not yet fully supported
 900      * in xcb */
 901     if (config.hide_on_modifier) {
 902         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 903         xkb_major = XkbMajorVersion;
 904         xkb_minor = XkbMinorVersion;
 905
 906         xkb_dpy = XkbOpenDisplay(NULL,
 907                                  &xkb_event_base,
 908                                  &xkb_errbase,
 909                                  &xkb_major,
 910                                  &xkb_minor,
 911                                  &xkb_err);
 912
 913         if (xkb_dpy == NULL) {
 914             ELOG("No XKB!\n");
 915             exit(EXIT_FAILURE);
 916         }
 917
 918         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 919             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
 920             exit(EXIT_FAILURE);
 921         }
 922
 923         int i1;
 924         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
 925             ELOG("XKB not supported by X-server!\n");
 926             exit(EXIT_FAILURE);
 927         }
 928
 929         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
 930             ELOG("Could not grab Key!\n");
 931             exit(EXIT_FAILURE);
 932         }
 933
 934         xkb_io = smalloc(sizeof(ev_io));
 935         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
 936         ev_io_start(main_loop, xkb_io);
 937         XFlush(xkb_dpy);
 938     }
 939
 940     /* Now we save the font-infos */
 941     font_info = xcb_query_font_reply(xcb_connection,
 942                                      query_font_cookie,
 943                                      NULL);
 944
 945     if (xcb_request_failed(open_font_cookie, "Could not open font")) {
 946         exit(EXIT_FAILURE);
 947     }
 948
 949     font_height = font_info->font_ascent + font_info->font_descent;
 950
 951     if (xcb_query_font_char_infos_length(font_info) == 0) {
 952         font_table = NULL;
 953     } else {
 954         font_table = xcb_query_font_char_infos(font_info);
 955     }
 956
 957     DLOG("Calculated Font-height: %d\n", font_height);
 958 }
 959
 960 /*
 961  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
 962  * for the X11 display we are running on, then acquiring the selection for this
 963  * atom. Afterwards, tray clients will send ClientMessages to our window.
 964  *
 965  */
 966 void init_tray() {
 967     DLOG("Initializing system tray functionality\n");
 968     /* request the tray manager atom for the X11 display we are running on */
 969     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
 970     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
 971     xcb_intern_atom_cookie_t tray_cookie;
 972     xcb_intern_atom_reply_t *tray_reply;
 973     tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
 974
 975     /* tray support: we need a window to own the selection */
 976     xcb_window_t selwin = xcb_generate_id(xcb_connection);
 977     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
 978     uint32_t selval[] = { 1 };
 979     xcb_create_window(xcb_connection,
 980                       xcb_screen->root_depth,
 981                       selwin,
 982                       xcb_root,
 983                       -1, -1,
 984                       1, 1,
 985                       1,
 986                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
 987                       xcb_screen->root_visual,
 988                       selmask,
 989                       selval);
 990
 991     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 992     /* set the atoms */
 993     xcb_change_property(xcb_connection,
 994                         XCB_PROP_MODE_REPLACE,
 995                         selwin,
 996                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
 997                         XCB_ATOM_CARDINAL,
 998                         32,
 999                         1,
1000                         &orientation);
1001
1002     if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1003         ELOG("Could not get atom %s\n", atomname);
1004         exit(EXIT_FAILURE);
1005     }
1006
1007     xcb_set_selection_owner(xcb_connection,
1008                             selwin,
1009                             tray_reply->atom,
1010                             XCB_CURRENT_TIME);
1011
1012     /* Verify that we have the selection */
1013     xcb_get_selection_owner_cookie_t selcookie;
1014     xcb_get_selection_owner_reply_t *selreply;
1015
1016     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1017     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1018         ELOG("Could not get selection owner for %s\n", atomname);
1019         exit(EXIT_FAILURE);
1020     }
1021
1022     if (selreply->owner != selwin) {
1023         ELOG("Could not set the %s selection. " \
1024              "Maybe another tray is already running?\n", atomname);
1025         /* NOTE that this error is not fatal. We just can’t provide tray
1026          * functionality */
1027         free(selreply);
1028         return;
1029     }
1030
1031     /* Inform clients waiting for a new _NET_SYSTEM_TRAY that we are here */
1032     void *event = scalloc(32);
1033     xcb_client_message_event_t *ev = event;
1034     ev->response_type = XCB_CLIENT_MESSAGE;
1035     ev->window = xcb_root;
1036     ev->type = atoms[MANAGER];
1037     ev->format = 32;
1038     ev->data.data32[0] = XCB_CURRENT_TIME;
1039     ev->data.data32[1] = tray_reply->atom;
1040     ev->data.data32[2] = selwin;
1041     xcb_send_event(xcb_connection,
1042                    0,
1043                    xcb_root,
1044                    XCB_EVENT_MASK_STRUCTURE_NOTIFY,
1045                    (char*)ev);
1046     free(event);
1047     free(tray_reply);
1048 }
1049
1050 /*
1051  * Cleanup the xcb-stuff.
1052  * Called once, before the program terminates.
1053  *
1054  */
1055 void clean_xcb() {
1056     i3_output *o_walk;
1057     trayclient *trayclient;
1058     free_workspaces();
1059     SLIST_FOREACH(o_walk, outputs, slist) {
1060         TAILQ_FOREACH(trayclient, o_walk->trayclients, tailq) {
1061             /* Unmap, then reparent (to root) the tray client windows */
1062             xcb_unmap_window(xcb_connection, trayclient->win);
1063             xcb_reparent_window(xcb_connection,
1064                                 trayclient->win,
1065                                 xcb_root,
1066                                 0,
1067                                 0);
1068         }
1069         destroy_window(o_walk);
1070         FREE(o_walk->trayclients);
1071         FREE(o_walk->workspaces);
1072         FREE(o_walk->name);
1073     }
1074     FREE_SLIST(outputs, i3_output);
1075     FREE(outputs);
1076
1077     xcb_flush(xcb_connection);
1078     xcb_disconnect(xcb_connection);
1079
1080     ev_check_stop(main_loop, xcb_chk);
1081     ev_prepare_stop(main_loop, xcb_prep);
1082     ev_io_stop(main_loop, xcb_io);
1083
1084     FREE(xcb_chk);
1085     FREE(xcb_prep);
1086     FREE(xcb_io);
1087     FREE(font_info);
1088 }
1089
1090 /*
1091  * Get the earlier requested atoms and save them in the prepared data structure
1092  *
1093  */
1094 void get_atoms() {
1095     xcb_intern_atom_reply_t *reply;
1096     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1097         if (reply == NULL) { \
1098             ELOG("Could not get atom %s\n", #name); \
1099             exit(EXIT_FAILURE); \
1100         } \
1101         atoms[name] = reply->atom; \
1102         free(reply);
1103
1104     #include "xcb_atoms.def"
1105     DLOG("Got Atoms\n");
1106 }
1107
1108 /*
1109  * Destroy the bar of the specified output
1110  *
1111  */
1112 void destroy_window(i3_output *output) {
1113     if (output == NULL) {
1114         return;
1115     }
1116     if (output->bar == XCB_NONE) {
1117         return;
1118     }
1119     xcb_destroy_window(xcb_connection, output->bar);
1120     output->bar = XCB_NONE;
1121 }
1122
1123 /*
1124  * Reallocate the statusline-buffer
1125  *
1126  */
1127 void realloc_sl_buffer() {
1128     DLOG("Re-allocating statusline-buffer, statusline_width = %d, xcb_screen->width_in_pixels = %d\n",
1129          statusline_width, xcb_screen->width_in_pixels);
1130     xcb_free_pixmap(xcb_connection, statusline_pm);
1131     statusline_pm = xcb_generate_id(xcb_connection);
1132     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1133                                                                xcb_screen->root_depth,
1134                                                                statusline_pm,
1135                                                                xcb_root,
1136                                                                MAX(xcb_screen->width_in_pixels, statusline_width),
1137                                                                xcb_screen->height_in_pixels);
1138
1139     uint32_t mask = XCB_GC_FOREGROUND;
1140     uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
1141     xcb_free_gc(xcb_connection, statusline_clear);
1142     statusline_clear = xcb_generate_id(xcb_connection);
1143     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1144                                                                statusline_clear,
1145                                                                xcb_root,
1146                                                                mask,
1147                                                                vals);
1148
1149     mask |= XCB_GC_BACKGROUND | XCB_GC_FONT;
1150     vals[0] = colors.bar_fg;
1151     statusline_ctx = xcb_generate_id(xcb_connection);
1152     xcb_free_gc(xcb_connection, statusline_ctx);
1153     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1154                                                             statusline_ctx,
1155                                                             xcb_root,
1156                                                             mask,
1157                                                             vals);
1158
1159     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1160         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1161         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1162         exit(EXIT_FAILURE);
1163     }
1164
1165 }
1166
1167 /*
1168  * Reconfigure all bars and create new bars for recently activated outputs
1169  *
1170  */
1171 void reconfig_windows() {
1172     uint32_t mask;
1173     uint32_t values[5];
1174     static bool tray_configured = false;
1175
1176     i3_output *walk;
1177     SLIST_FOREACH(walk, outputs, slist) {
1178         if (!walk->active) {
1179             /* If an output is not active, we destroy its bar */
1180             /* FIXME: Maybe we rather want to unmap? */
1181             DLOG("Destroying window for output %s\n", walk->name);
1182             destroy_window(walk);
1183             continue;
1184         }
1185         if (walk->bar == XCB_NONE) {
1186             DLOG("Creating Window for output %s\n", walk->name);
1187
1188             walk->bar = xcb_generate_id(xcb_connection);
1189             walk->buffer = xcb_generate_id(xcb_connection);
1190             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1191             /* Black background */
1192             values[0] = colors.bar_bg;
1193             /* If hide_on_modifier is set, i3 is not supposed to manage our bar-windows */
1194             values[1] = config.hide_on_modifier;
1195             /* We enable the following EventMask fields:
1196              * EXPOSURE, to get expose events (we have to re-draw then)
1197              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1198              *                        child windows use ConfigureWindow
1199              * BUTTON_PRESS, to handle clicks on the workspace buttons
1200              * */
1201             values[2] = XCB_EVENT_MASK_EXPOSURE |
1202                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1203             if (!config.disable_ws) {
1204                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1205             }
1206             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1207                                                                      xcb_screen->root_depth,
1208                                                                      walk->bar,
1209                                                                      xcb_root,
1210                                                                      walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
1211                                                                      walk->rect.w, font_height + 6,
1212                                                                      1,
1213                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1214                                                                      xcb_screen->root_visual,
1215                                                                      mask,
1216                                                                      values);
1217
1218             /* The double-buffer we use to render stuff off-screen */
1219             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1220                                                                     xcb_screen->root_depth,
1221                                                                     walk->buffer,
1222                                                                     walk->bar,
1223                                                                     walk->rect.w,
1224                                                                     walk->rect.h);
1225
1226             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1227             xcb_void_cookie_t class_cookie;
1228             class_cookie = xcb_change_property(xcb_connection,
1229                                                XCB_PROP_MODE_REPLACE,
1230                                                walk->bar,
1231                                                XCB_ATOM_WM_CLASS,
1232                                                XCB_ATOM_STRING,
1233                                                8,
1234                                                (strlen("i3bar") + 1) * 2,
1235                                                "i3bar\0i3bar\0");
1236
1237             char *name;
1238             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1239                 err(EXIT_FAILURE, "asprintf()");
1240             xcb_void_cookie_t name_cookie;
1241             name_cookie = xcb_change_property(xcb_connection,
1242                                               XCB_PROP_MODE_REPLACE,
1243                                               walk->bar,
1244                                               XCB_ATOM_WM_NAME,
1245                                               XCB_ATOM_STRING,
1246                                               8,
1247                                               strlen(name),
1248                                               name);
1249             free(name);
1250
1251             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1252              * this one */
1253             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1254                                                                 XCB_PROP_MODE_REPLACE,
1255                                                                 walk->bar,
1256                                                                 atoms[_NET_WM_WINDOW_TYPE],
1257                                                                 XCB_ATOM_ATOM,
1258                                                                 32,
1259                                                                 1,
1260                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1261
1262             /* We need to tell i3, where to reserve space for i3bar */
1263             /* left, right, top, bottom, left_start_y, left_end_y,
1264              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1265              * bottom_end_x */
1266             /* A local struct to save the strut_partial property */
1267             struct {
1268                 uint32_t left;
1269                 uint32_t right;
1270                 uint32_t top;
1271                 uint32_t bottom;
1272                 uint32_t left_start_y;
1273                 uint32_t left_end_y;
1274                 uint32_t right_start_y;
1275                 uint32_t right_end_y;
1276                 uint32_t top_start_x;
1277                 uint32_t top_end_x;
1278                 uint32_t bottom_start_x;
1279                 uint32_t bottom_end_x;
1280             } __attribute__((__packed__)) strut_partial = {0,};
1281             switch (config.position) {
1282                 case POS_NONE:
1283                     break;
1284                 case POS_TOP:
1285                     strut_partial.top = font_height + 6;
1286                     strut_partial.top_start_x = walk->rect.x;
1287                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1288                     break;
1289                 case POS_BOT:
1290                     strut_partial.bottom = font_height + 6;
1291                     strut_partial.bottom_start_x = walk->rect.x;
1292                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1293                     break;
1294             }
1295             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1296                                                                  XCB_PROP_MODE_REPLACE,
1297                                                                  walk->bar,
1298                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1299                                                                  XCB_ATOM_CARDINAL,
1300                                                                  32,
1301                                                                  12,
1302                                                                  &strut_partial);
1303
1304             /* We also want a graphics-context for the bars (it defines the properties
1305              * with which we draw to them) */
1306             walk->bargc = xcb_generate_id(xcb_connection);
1307             mask = XCB_GC_FONT;
1308             values[0] = xcb_font;
1309             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1310                                                                 walk->bargc,
1311                                                                 walk->bar,
1312                                                                 mask,
1313                                                                 values);
1314
1315             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1316             xcb_void_cookie_t map_cookie;
1317             if (!config.hide_on_modifier) {
1318                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1319             }
1320
1321             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1322                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1323                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1324                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1325                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1326                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1327                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1328                 (!config.hide_on_modifier && xcb_request_failed(map_cookie, "Could not map window"))) {
1329                 exit(EXIT_FAILURE);
1330             }
1331
1332             if (!tray_configured &&
1333                 (!config.tray_output ||
1334                  strcasecmp("none", config.tray_output) != 0)) {
1335                 init_tray();
1336                 tray_configured = true;
1337             }
1338         } else {
1339             /* We already have a bar, so we just reconfigure it */
1340             mask = XCB_CONFIG_WINDOW_X |
1341                    XCB_CONFIG_WINDOW_Y |
1342                    XCB_CONFIG_WINDOW_WIDTH |
1343                    XCB_CONFIG_WINDOW_HEIGHT |
1344                    XCB_CONFIG_WINDOW_STACK_MODE;
1345             values[0] = walk->rect.x;
1346             values[1] = walk->rect.y + walk->rect.h - font_height - 6;
1347             values[2] = walk->rect.w;
1348             values[3] = font_height + 6;
1349             values[4] = XCB_STACK_MODE_ABOVE;
1350
1351             DLOG("Destroying buffer for output %s", walk->name);
1352             xcb_free_pixmap(xcb_connection, walk->buffer);
1353
1354             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1355             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1356                                                                         walk->bar,
1357                                                                         mask,
1358                                                                         values);
1359
1360             DLOG("Recreating buffer for output %s", walk->name);
1361             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1362                                                                     xcb_screen->root_depth,
1363                                                                     walk->buffer,
1364                                                                     walk->bar,
1365                                                                     walk->rect.w,
1366                                                                     walk->rect.h);
1367
1368             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window")) {
1369                 exit(EXIT_FAILURE);
1370             }
1371             if (xcb_request_failed(pm_cookie,  "Could not create pixmap")) {
1372                 exit(EXIT_FAILURE);
1373             }
1374         }
1375     }
1376 }
1377
1378 /*
1379  * Render the bars, with buttons and statusline
1380  *
1381  */
1382 void draw_bars() {
1383     DLOG("Drawing Bars...\n");
1384     int i = 0;
1385
1386     refresh_statusline();
1387
1388     i3_output *outputs_walk;
1389     SLIST_FOREACH(outputs_walk, outputs, slist) {
1390         if (!outputs_walk->active) {
1391             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1392             continue;
1393         }
1394         if (outputs_walk->bar == XCB_NONE) {
1395             /* Oh shit, an active output without an own bar. Create it now! */
1396             reconfig_windows();
1397         }
1398         /* First things first: clear the backbuffer */
1399         uint32_t color = colors.bar_bg;
1400         xcb_change_gc(xcb_connection,
1401                       outputs_walk->bargc,
1402                       XCB_GC_FOREGROUND,
1403                       &color);
1404         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
1405         xcb_poly_fill_rectangle(xcb_connection,
1406                                 outputs_walk->buffer,
1407                                 outputs_walk->bargc,
1408                                 1,
1409                                 &rect);
1410
1411         if (statusline != NULL) {
1412             DLOG("Printing statusline!\n");
1413
1414             /* Luckily we already prepared a seperate pixmap containing the rendered
1415              * statusline, we just have to copy the relevant parts to the relevant
1416              * position */
1417             trayclient *trayclient;
1418             int traypx = 0;
1419             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1420                 if (!trayclient->mapped)
1421                     continue;
1422                 /* We assume the tray icons are quadratic (we use the font
1423                  * *height* as *width* of the icons) because we configured them
1424                  * like this. */
1425                 traypx += font_height + 2;
1426             }
1427             /* Add 2px of padding if there are any tray icons */
1428             if (traypx > 0)
1429                 traypx += 2;
1430             xcb_copy_area(xcb_connection,
1431                           statusline_pm,
1432                           outputs_walk->buffer,
1433                           outputs_walk->bargc,
1434                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1435                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1436                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
1437         }
1438
1439         if (config.disable_ws) {
1440             continue;
1441         }
1442
1443         i3_ws *ws_walk;
1444         TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1445             DLOG("Drawing Button for WS %s at x = %d\n", ws_walk->name, i);
1446             uint32_t fg_color = colors.inactive_ws_fg;
1447             uint32_t bg_color = colors.inactive_ws_bg;
1448             if (ws_walk->visible) {
1449                 if (!ws_walk->focused) {
1450                     fg_color = colors.active_ws_fg;
1451                     bg_color = colors.active_ws_bg;
1452                 } else {
1453                     fg_color = colors.focus_ws_fg;
1454                     bg_color = colors.focus_ws_bg;
1455                 }
1456             }
1457             if (ws_walk->urgent) {
1458                 DLOG("WS %s is urgent!\n", ws_walk->name);
1459                 fg_color = colors.urgent_ws_fg;
1460                 bg_color = colors.urgent_ws_bg;
1461                 /* The urgent-hint should get noticed, so we unhide the bars shortly */
1462                 unhide_bars();
1463             }
1464             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1465             uint32_t vals[] = { bg_color, bg_color };
1466             xcb_change_gc(xcb_connection,
1467                           outputs_walk->bargc,
1468                           mask,
1469                           vals);
1470             xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
1471             xcb_poly_fill_rectangle(xcb_connection,
1472                                     outputs_walk->buffer,
1473                                     outputs_walk->bargc,
1474                                     1,
1475                                     &rect);
1476             xcb_change_gc(xcb_connection,
1477                           outputs_walk->bargc,
1478                           XCB_GC_FOREGROUND,
1479                           &fg_color);
1480             xcb_image_text_16(xcb_connection,
1481                               ws_walk->name_glyphs,
1482                               outputs_walk->buffer,
1483                               outputs_walk->bargc,
1484                               i + 5, font_info->font_ascent + 2,
1485                               ws_walk->ucs2_name);
1486             i += 10 + ws_walk->name_width;
1487         }
1488
1489         i = 0;
1490     }
1491
1492     redraw_bars();
1493 }
1494
1495 /*
1496  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1497  *
1498  */
1499 void redraw_bars() {
1500     i3_output *outputs_walk;
1501     SLIST_FOREACH(outputs_walk, outputs, slist) {
1502         if (!outputs_walk->active) {
1503             continue;
1504         }
1505         xcb_copy_area(xcb_connection,
1506                       outputs_walk->buffer,
1507                       outputs_walk->bar,
1508                       outputs_walk->bargc,
1509                       0, 0,
1510                       0, 0,
1511                       outputs_walk->rect.w,
1512                       outputs_walk->rect.h);
1513         xcb_flush(xcb_connection);
1514     }
1515 }