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

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010-2012 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include <xcb/xcb.h>
  11 #include <xcb/xproto.h>
  12 #include <xcb/xcb_aux.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     *root_screen;
  50 xcb_window_t     xcb_root;
  51
  52 /* selection window for tray support */
  53 static xcb_window_t selwin = XCB_NONE;
  54 static xcb_intern_atom_reply_t *tray_reply = NULL;
  55
  56 /* This is needed for integration with libi3 */
  57 xcb_connection_t *conn;
  58
  59 /* The font we'll use */
  60 static i3Font font;
  61
  62 /* Overall height of the bar (based on font size) */
  63 int bar_height;
  64
  65 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  66 Display          *xkb_dpy;
  67 int              xkb_event_base;
  68 int              mod_pressed = 0;
  69
  70 /* Because the statusline is the same on all outputs, we have
  71  * global buffer to render it on */
  72 xcb_gcontext_t   statusline_ctx;
  73 xcb_gcontext_t   statusline_clear;
  74 xcb_pixmap_t     statusline_pm;
  75 uint32_t         statusline_width;
  76
  77 /* Event-Watchers, to interact with the user */
  78 ev_prepare *xcb_prep;
  79 ev_check   *xcb_chk;
  80 ev_io      *xcb_io;
  81 ev_io      *xkb_io;
  82
  83 /* The name of current binding mode */
  84 static mode binding;
  85
  86 /* Indicates whether a new binding mode was recently activated */
  87 bool activated_mode = false;
  88
  89 /* The parsed colors */
  90 struct xcb_colors_t {
  91     uint32_t bar_fg;
  92     uint32_t bar_bg;
  93     uint32_t sep_fg;
  94     uint32_t active_ws_fg;
  95     uint32_t active_ws_bg;
  96     uint32_t active_ws_border;
  97     uint32_t inactive_ws_fg;
  98     uint32_t inactive_ws_bg;
  99     uint32_t inactive_ws_border;
 100     uint32_t urgent_ws_bg;
 101     uint32_t urgent_ws_fg;
 102     uint32_t urgent_ws_border;
 103     uint32_t focus_ws_bg;
 104     uint32_t focus_ws_fg;
 105     uint32_t focus_ws_border;
 106 };
 107 struct xcb_colors_t colors;
 108
 109 /* We define xcb_request_failed as a macro to include the relevant line-number */
 110 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 111 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 112     xcb_generic_error_t *err;
 113     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 114         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 115         return err->error_code;
 116     }
 117     return 0;
 118 }
 119
 120 /*
 121  * Redraws the statusline to the buffer
 122  *
 123  */
 124 void refresh_statusline(void) {
 125     struct status_block *block;
 126
 127     uint32_t old_statusline_width = statusline_width;
 128     statusline_width = 0;
 129
 130     /* Predict the text width of all blocks (in pixels). */
 131     TAILQ_FOREACH(block, &statusline_head, blocks) {
 132         if (i3string_get_num_bytes(block->full_text) == 0)
 133             continue;
 134
 135         block->width = predict_text_width(block->full_text);
 136
 137         /* Compute offset and append for text aligment in min_width. */
 138         if (block->min_width <= block->width) {
 139             block->x_offset = 0;
 140             block->x_append = 0;
 141         } else {
 142             uint32_t padding_width = block->min_width - block->width;
 143             switch (block->align) {
 144                 case ALIGN_LEFT:
 145                     block->x_append = padding_width;
 146                     break;
 147                 case ALIGN_RIGHT:
 148                     block->x_offset = padding_width;
 149                     break;
 150                 case ALIGN_CENTER:
 151                     block->x_offset = padding_width / 2;
 152                     block->x_append = padding_width / 2 + padding_width % 2;
 153                     break;
 154             }
 155         }
 156
 157         /* If this is not the last block, add some pixels for a separator. */
 158         if (TAILQ_NEXT(block, blocks) != NULL)
 159             block->width += block->sep_block_width;
 160
 161         statusline_width += block->width + block->x_offset + block->x_append;
 162     }
 163
 164     /* If the statusline is bigger than our screen we need to make sure that
 165      * the pixmap provides enough space, so re-allocate if the width grew */
 166     if (statusline_width > root_screen->width_in_pixels &&
 167         statusline_width > old_statusline_width)
 168         realloc_sl_buffer();
 169
 170     /* Clear the statusline pixmap. */
 171     xcb_rectangle_t rect = { 0, 0, root_screen->width_in_pixels, font.height + 2 };
 172     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 173
 174     /* Draw the text of each block. */
 175     uint32_t x = 0;
 176     TAILQ_FOREACH(block, &statusline_head, blocks) {
 177         if (i3string_get_num_bytes(block->full_text) == 0)
 178             continue;
 179
 180         uint32_t colorpixel = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 181         set_font_colors(statusline_ctx, colorpixel, colors.bar_bg);
 182         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, 1, block->width);
 183         x += block->width + block->x_offset + block->x_append;
 184
 185         if (TAILQ_NEXT(block, blocks) != NULL && !block->no_separator && block->sep_block_width > 0) {
 186             /* This is not the last block, draw a separator. */
 187             uint32_t sep_offset = block->sep_block_width/2 + block->sep_block_width % 2;
 188             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
 189             uint32_t values[] = { colors.sep_fg, colors.bar_bg };
 190             xcb_change_gc(xcb_connection, statusline_ctx, mask, values);
 191             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 192                           statusline_ctx, 2,
 193                           (xcb_point_t[]){ { x - sep_offset, 2 },
 194                                            { x - sep_offset, font.height - 2 } });
 195         }
 196     }
 197 }
 198
 199 /*
 200  * Hides all bars (unmaps them)
 201  *
 202  */
 203 void hide_bars(void) {
 204     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 205         return;
 206     }
 207
 208     i3_output *walk;
 209     SLIST_FOREACH(walk, outputs, slist) {
 210         if (!walk->active) {
 211             continue;
 212         }
 213         xcb_unmap_window(xcb_connection, walk->bar);
 214     }
 215     stop_child();
 216 }
 217
 218 /*
 219  * Unhides all bars (maps them)
 220  *
 221  */
 222 void unhide_bars(void) {
 223     if (config.hide_on_modifier != M_HIDE) {
 224         return;
 225     }
 226
 227     i3_output           *walk;
 228     xcb_void_cookie_t   cookie;
 229     uint32_t            mask;
 230     uint32_t            values[5];
 231
 232     cont_child();
 233
 234     SLIST_FOREACH(walk, outputs, slist) {
 235         if (walk->bar == XCB_NONE) {
 236             continue;
 237         }
 238         mask = XCB_CONFIG_WINDOW_X |
 239                XCB_CONFIG_WINDOW_Y |
 240                XCB_CONFIG_WINDOW_WIDTH |
 241                XCB_CONFIG_WINDOW_HEIGHT |
 242                XCB_CONFIG_WINDOW_STACK_MODE;
 243         values[0] = walk->rect.x;
 244         if (config.position == POS_TOP)
 245             values[1] = walk->rect.y;
 246         else values[1] = walk->rect.y + walk->rect.h - bar_height;
 247         values[2] = walk->rect.w;
 248         values[3] = bar_height;
 249         values[4] = XCB_STACK_MODE_ABOVE;
 250         DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 251         cookie = xcb_configure_window_checked(xcb_connection,
 252                                               walk->bar,
 253                                               mask,
 254                                               values);
 255
 256         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 257             exit(EXIT_FAILURE);
 258         }
 259         xcb_map_window(xcb_connection, walk->bar);
 260     }
 261 }
 262
 263 /*
 264  * Parse the colors into a format that we can use
 265  *
 266  */
 267 void init_colors(const struct xcb_color_strings_t *new_colors) {
 268 #define PARSE_COLOR(name, def) \
 269     do { \
 270         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 271     } while  (0)
 272     PARSE_COLOR(bar_fg, "#FFFFFF");
 273     PARSE_COLOR(bar_bg, "#000000");
 274     PARSE_COLOR(sep_fg, "#666666");
 275     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 276     PARSE_COLOR(active_ws_bg, "#333333");
 277     PARSE_COLOR(active_ws_border, "#333333");
 278     PARSE_COLOR(inactive_ws_fg, "#888888");
 279     PARSE_COLOR(inactive_ws_bg, "#222222");
 280     PARSE_COLOR(inactive_ws_border, "#333333");
 281     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 282     PARSE_COLOR(urgent_ws_bg, "#900000");
 283     PARSE_COLOR(urgent_ws_border, "#2f343a");
 284     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 285     PARSE_COLOR(focus_ws_bg, "#285577");
 286     PARSE_COLOR(focus_ws_border, "#4c7899");
 287 #undef PARSE_COLOR
 288
 289     init_tray_colors();
 290     xcb_flush(xcb_connection);
 291 }
 292
 293 /*
 294  * Handle a button-press-event (i.e. a mouse click on one of our bars).
 295  * We determine, whether the click occured on a ws-button or if the scroll-
 296  * wheel was used and change the workspace appropriately
 297  *
 298  */
 299 void handle_button(xcb_button_press_event_t *event) {
 300     i3_ws *cur_ws;
 301
 302     /* Determine, which bar was clicked */
 303     i3_output *walk;
 304     xcb_window_t bar = event->event;
 305     SLIST_FOREACH(walk, outputs, slist) {
 306         if (walk->bar == bar) {
 307             break;
 308         }
 309     }
 310
 311     if (walk == NULL) {
 312         DLOG("Unknown Bar klicked!\n");
 313         return;
 314     }
 315
 316     /* TODO: Move this to extern get_ws_for_output() */
 317     TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 318         if (cur_ws->visible) {
 319             break;
 320         }
 321     }
 322
 323     if (cur_ws == NULL) {
 324         DLOG("No Workspace active?\n");
 325         return;
 326     }
 327
 328     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 329     int32_t original_x = x;
 330
 331     DLOG("Got Button %d\n", event->detail);
 332
 333     switch (event->detail) {
 334         case 4:
 335             /* Mouse wheel up. We select the previous ws, if any.
 336              * If there is no more workspace, don’t even send the workspace
 337              * command, otherwise (with workspace auto_back_and_forth) we’d end
 338              * up on the wrong workspace. */
 339             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 340                 return;
 341
 342             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 343             break;
 344         case 5:
 345             /* Mouse wheel down. We select the next ws, if any.
 346              * If there is no more workspace, don’t even send the workspace
 347              * command, otherwise (with workspace auto_back_and_forth) we’d end
 348              * up on the wrong workspace. */
 349             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 350                 return;
 351
 352             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 353             break;
 354         default:
 355             /* Check if this event regards a workspace button */
 356             TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 357                 DLOG("x = %d\n", x);
 358                 if (x >= 0 && x < cur_ws->name_width + 10) {
 359                     break;
 360                 }
 361                 x -= cur_ws->name_width + 11;
 362             }
 363             if (cur_ws == NULL) {
 364                 /* No workspace button was pressed.
 365                  * Check if a status block has been clicked.
 366                  * This of course only has an effect,
 367                  * if the child reported bidirectional protocol usage. */
 368
 369                 /* First calculate width of tray area */
 370                 trayclient *trayclient;
 371                 int tray_width = 0;
 372                 TAILQ_FOREACH_REVERSE(trayclient, walk->trayclients, tc_head, tailq) {
 373                     if (!trayclient->mapped)
 374                         continue;
 375                     tray_width += (font.height + 2);
 376                 }
 377
 378                 int block_x = 0, last_block_x;
 379                 int offset = (walk->rect.w - (statusline_width + tray_width)) - 10;
 380
 381                 x = original_x - offset;
 382                 if (x < 0)
 383                     return;
 384
 385                 struct status_block *block;
 386
 387                 TAILQ_FOREACH(block, &statusline_head, blocks) {
 388                     last_block_x = block_x;
 389                     block_x += block->width + block->x_offset + block->x_append;
 390
 391                     if (x <= block_x && x >= last_block_x) {
 392                         send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 393                         return;
 394                     }
 395                 }
 396                 return;
 397             }
 398             if (event->detail != 1)
 399                 return;
 400     }
 401
 402     /* To properly handle workspace names with double quotes in them, we need
 403      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 404      * first count the number of double quotes, then we allocate a large enough
 405      * buffer, then we copy character by character. */
 406     int num_quotes = 0;
 407     size_t namelen = 0;
 408     const char *utf8_name = i3string_as_utf8(cur_ws->name);
 409     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 410         if (*walk == '"')
 411             num_quotes++;
 412         /* While we’re looping through the name anyway, we can save one
 413          * strlen(). */
 414         namelen++;
 415     }
 416
 417     const size_t len = namelen + strlen("workspace \"\"") + 1;
 418     char *buffer = scalloc(len+num_quotes);
 419     strncpy(buffer, "workspace \"", strlen("workspace \""));
 420     int inpos, outpos;
 421     for (inpos = 0, outpos = strlen("workspace \"");
 422          inpos < namelen;
 423          inpos++, outpos++) {
 424         if (utf8_name[inpos] == '"') {
 425             buffer[outpos] = '\\';
 426             outpos++;
 427         }
 428         buffer[outpos] = utf8_name[inpos];
 429     }
 430     buffer[outpos] = '"';
 431     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 432     free(buffer);
 433 }
 434
 435 /*
 436  * Configures the x coordinate of all trayclients. To be called after adding a
 437  * new tray client or removing an old one.
 438  *
 439  */
 440 static void configure_trayclients(void) {
 441     trayclient *trayclient;
 442     i3_output *output;
 443     SLIST_FOREACH(output, outputs, slist) {
 444         if (!output->active)
 445             continue;
 446
 447         int clients = 0;
 448         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 449             if (!trayclient->mapped)
 450                 continue;
 451             clients++;
 452
 453             DLOG("Configuring tray window %08x to x=%d\n",
 454                  trayclient->win, output->rect.w - (clients * (font.height + 2)));
 455             uint32_t x = output->rect.w - (clients * (font.height + 2));
 456             xcb_configure_window(xcb_connection,
 457                                  trayclient->win,
 458                                  XCB_CONFIG_WINDOW_X,
 459                                  &x);
 460         }
 461     }
 462 }
 463
 464 /*
 465  * Handles ClientMessages (messages sent from another client directly to us).
 466  *
 467  * At the moment, only the tray window will receive client messages. All
 468  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 469  *
 470  */
 471 static void handle_client_message(xcb_client_message_event_t* event) {
 472     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 473         event->format == 32) {
 474         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 475         /* event->data.data32[0] is the timestamp */
 476         uint32_t op = event->data.data32[1];
 477         uint32_t mask;
 478         uint32_t values[2];
 479         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 480             xcb_window_t client = event->data.data32[2];
 481
 482             /* Listen for PropertyNotify events to get the most recent value of
 483              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 484             mask = XCB_CW_EVENT_MASK;
 485             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 486                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 487             xcb_change_window_attributes(xcb_connection,
 488                                          client,
 489                                          mask,
 490                                          values);
 491
 492             /* Request the _XEMBED_INFO property. The XEMBED specification
 493              * (which is referred by the tray specification) says this *has* to
 494              * be set, but VLC does not set it… */
 495             bool map_it = true;
 496             int xe_version = 1;
 497             xcb_get_property_cookie_t xembedc;
 498             xcb_generic_error_t *error;
 499             xembedc = xcb_get_property(xcb_connection,
 500                                        0,
 501                                        client,
 502                                        atoms[_XEMBED_INFO],
 503                                        XCB_GET_PROPERTY_TYPE_ANY,
 504                                        0,
 505                                        2 * 32);
 506
 507             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 508                                                                        xembedc,
 509                                                                        &error);
 510             if (error != NULL) {
 511                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 512                      error->error_code);
 513                 free(error);
 514                 return;
 515             }
 516             if (xembedr != NULL && xembedr->length != 0) {
 517                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 518                 uint32_t *xembed = xcb_get_property_value(xembedr);
 519                 DLOG("xembed version = %d\n", xembed[0]);
 520                 DLOG("xembed flags = %d\n", xembed[1]);
 521                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 522                 xe_version = xembed[0];
 523                 if (xe_version > 1)
 524                     xe_version = 1;
 525                 free(xembedr);
 526             } else {
 527                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 528             }
 529
 530             DLOG("X window %08x requested docking\n", client);
 531             i3_output *walk, *output = NULL;
 532             SLIST_FOREACH(walk, outputs, slist) {
 533                 if (!walk->active)
 534                     continue;
 535                 if (config.tray_output) {
 536                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 537                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 538                         continue;
 539                 }
 540
 541                 DLOG("using output %s\n", walk->name);
 542                 output = walk;
 543                 break;
 544             }
 545             /* In case of tray_output == primary and there is no primary output
 546              * configured, we fall back to the first available output. */
 547             if (output == NULL &&
 548                 config.tray_output &&
 549                 strcasecmp("primary", config.tray_output) == 0) {
 550                 SLIST_FOREACH(walk, outputs, slist) {
 551                     if (!walk->active)
 552                         continue;
 553                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 554                     output = walk;
 555                     break;
 556                 }
 557             }
 558             if (output == NULL) {
 559                 ELOG("No output found\n");
 560                 return;
 561             }
 562             xcb_reparent_window(xcb_connection,
 563                                 client,
 564                                 output->bar,
 565                                 output->rect.w - font.height - 2,
 566                                 2);
 567             /* We reconfigure the window to use a reasonable size. The systray
 568              * specification explicitly says:
 569              *   Tray icons may be assigned any size by the system tray, and
 570              *   should do their best to cope with any size effectively
 571              */
 572             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 573             values[0] = font.height;
 574             values[1] = font.height;
 575             xcb_configure_window(xcb_connection,
 576                                  client,
 577                                  mask,
 578                                  values);
 579
 580             /* send the XEMBED_EMBEDDED_NOTIFY message */
 581             void *event = scalloc(32);
 582             xcb_client_message_event_t *ev = event;
 583             ev->response_type = XCB_CLIENT_MESSAGE;
 584             ev->window = client;
 585             ev->type = atoms[_XEMBED];
 586             ev->format = 32;
 587             ev->data.data32[0] = XCB_CURRENT_TIME;
 588             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 589             ev->data.data32[2] = output->bar;
 590             ev->data.data32[3] = xe_version;
 591             xcb_send_event(xcb_connection,
 592                            0,
 593                            client,
 594                            XCB_EVENT_MASK_NO_EVENT,
 595                            (char*)ev);
 596             free(event);
 597
 598             /* Put the client inside the save set. Upon termination (whether
 599              * killed or normal exit does not matter) of i3bar, these clients
 600              * will be correctly reparented to their most closest living
 601              * ancestor. Without this, tray icons might die when i3bar
 602              * exits/crashes. */
 603             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 604
 605             if (map_it) {
 606                 DLOG("Mapping dock client\n");
 607                 xcb_map_window(xcb_connection, client);
 608             } else {
 609                 DLOG("Not mapping dock client yet\n");
 610             }
 611             trayclient *tc = smalloc(sizeof(trayclient));
 612             tc->win = client;
 613             tc->mapped = map_it;
 614             tc->xe_version = xe_version;
 615             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 616
 617             /* Trigger an update to copy the statusline text to the appropriate
 618              * position */
 619             configure_trayclients();
 620             draw_bars(false);
 621         }
 622     }
 623 }
 624
 625 /*
 626  * Handles UnmapNotify events. These events happen when a tray window unmaps
 627  * itself. We then update our data structure
 628  *
 629  */
 630 static void handle_unmap_notify(xcb_unmap_notify_event_t* event) {
 631     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 632
 633     i3_output *walk;
 634     SLIST_FOREACH(walk, outputs, slist) {
 635         if (!walk->active)
 636             continue;
 637         DLOG("checking output %s\n", walk->name);
 638         trayclient *trayclient;
 639         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 640             if (trayclient->win != event->window)
 641                 continue;
 642
 643             DLOG("Removing tray client with window ID %08x\n", event->window);
 644             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 645
 646             /* Trigger an update, we now have more space for the statusline */
 647             configure_trayclients();
 648             draw_bars(false);
 649             return;
 650         }
 651     }
 652 }
 653
 654 /*
 655  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 656  * handled, which tells us whether a dock client should be mapped or unmapped.
 657  *
 658  */
 659 static void handle_property_notify(xcb_property_notify_event_t *event) {
 660     DLOG("PropertyNotify\n");
 661     if (event->atom == atoms[_XEMBED_INFO] &&
 662         event->state == XCB_PROPERTY_NEW_VALUE) {
 663         DLOG("xembed_info updated\n");
 664         trayclient *trayclient = NULL, *walk;
 665         i3_output *o_walk;
 666         SLIST_FOREACH(o_walk, outputs, slist) {
 667             if (!o_walk->active)
 668                 continue;
 669
 670             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 671                 if (walk->win != event->window)
 672                     continue;
 673                 trayclient = walk;
 674                 break;
 675             }
 676
 677             if (trayclient)
 678                 break;
 679         }
 680         if (!trayclient) {
 681             ELOG("PropertyNotify received for unknown window %08x\n",
 682                  event->window);
 683             return;
 684         }
 685         xcb_get_property_cookie_t xembedc;
 686         xembedc = xcb_get_property_unchecked(xcb_connection,
 687                                              0,
 688                                              trayclient->win,
 689                                              atoms[_XEMBED_INFO],
 690                                              XCB_GET_PROPERTY_TYPE_ANY,
 691                                              0,
 692                                              2 * 32);
 693
 694         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 695                                                                    xembedc,
 696                                                                    NULL);
 697         if (xembedr == NULL || xembedr->length == 0) {
 698             DLOG("xembed_info unset\n");
 699             return;
 700         }
 701
 702         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 703         uint32_t *xembed = xcb_get_property_value(xembedr);
 704         DLOG("xembed version = %d\n", xembed[0]);
 705         DLOG("xembed flags = %d\n", xembed[1]);
 706         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 707         DLOG("map-state now %d\n", map_it);
 708         if (trayclient->mapped && !map_it) {
 709             /* need to unmap the window */
 710             xcb_unmap_window(xcb_connection, trayclient->win);
 711             trayclient->mapped = map_it;
 712             configure_trayclients();
 713             draw_bars(false);
 714         } else if (!trayclient->mapped && map_it) {
 715             /* need to map the window */
 716             xcb_map_window(xcb_connection, trayclient->win);
 717             trayclient->mapped = map_it;
 718             configure_trayclients();
 719             draw_bars(false);
 720         }
 721         free(xembedr);
 722     }
 723 }
 724
 725 /*
 726  * Handle ConfigureRequests by denying them and sending the client a
 727  * ConfigureNotify with its actual size.
 728  *
 729  */
 730 static void handle_configure_request(xcb_configure_request_event_t *event) {
 731     DLOG("ConfigureRequest for window = %08x\n", event->window);
 732
 733     trayclient *trayclient;
 734     i3_output *output;
 735     SLIST_FOREACH(output, outputs, slist) {
 736         if (!output->active)
 737             continue;
 738
 739         int clients = 0;
 740         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 741             if (!trayclient->mapped)
 742                 continue;
 743             clients++;
 744
 745             if (trayclient->win != event->window)
 746                 continue;
 747
 748             xcb_rectangle_t rect;
 749             rect.x = output->rect.w - (clients * (font.height + 2));
 750             rect.y = 2;
 751             rect.width = font.height;
 752             rect.height = font.height;
 753
 754             DLOG("This is a tray window. x = %d\n", rect.x);
 755             fake_configure_notify(xcb_connection, rect, event->window, 0);
 756             return;
 757         }
 758     }
 759
 760     DLOG("WARNING: Could not find corresponding tray window.\n");
 761 }
 762
 763 /*
 764  * This function is called immediately before the main loop locks. We flush xcb
 765  * then (and only then)
 766  *
 767  */
 768 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 769     xcb_flush(xcb_connection);
 770 }
 771
 772 /*
 773  * This function is called immediately after the main loop locks, so when one
 774  * of the watchers registered an event.
 775  * We check whether an X-Event arrived and handle it.
 776  *
 777  */
 778 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 779     xcb_generic_event_t *event;
 780
 781     if (xcb_connection_has_error(xcb_connection)) {
 782         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 783         exit(1);
 784     }
 785
 786     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 787         switch (event->response_type & ~0x80) {
 788             case XCB_EXPOSE:
 789                 /* Expose-events happen, when the window needs to be redrawn */
 790                 redraw_bars();
 791                 break;
 792             case XCB_BUTTON_PRESS:
 793                 /* Button-press-events are mouse-buttons clicked on one of our bars */
 794                 handle_button((xcb_button_press_event_t*) event);
 795                 break;
 796             case XCB_CLIENT_MESSAGE:
 797                 /* Client messages are used for client-to-client communication, for
 798                  * example system tray widgets talk to us directly via client messages. */
 799                 handle_client_message((xcb_client_message_event_t*) event);
 800                 break;
 801             case XCB_UNMAP_NOTIFY:
 802             case XCB_DESTROY_NOTIFY:
 803                 /* UnmapNotifies are received when a tray window unmaps itself */
 804                 handle_unmap_notify((xcb_unmap_notify_event_t*) event);
 805                 break;
 806             case XCB_PROPERTY_NOTIFY:
 807                 /* PropertyNotify */
 808                 handle_property_notify((xcb_property_notify_event_t*) event);
 809                 break;
 810             case XCB_CONFIGURE_REQUEST:
 811                 /* ConfigureRequest, sent by a tray child */
 812                 handle_configure_request((xcb_configure_request_event_t*) event);
 813                 break;
 814         }
 815         free(event);
 816     }
 817 }
 818
 819 /*
 820  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
 821  * are triggered
 822  *
 823  */
 824 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 825 }
 826
 827 /*
 828  * We need to bind to the modifier per XKB. Sadly, XCB does not implement this
 829  *
 830  */
 831 void xkb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
 832     XkbEvent ev;
 833     int modstate = 0;
 834
 835     DLOG("Got XKB-Event!\n");
 836
 837     while (XPending(xkb_dpy)) {
 838         XNextEvent(xkb_dpy, (XEvent*)&ev);
 839
 840         if (ev.type != xkb_event_base) {
 841             ELOG("No Xkb-Event!\n");
 842             continue;
 843         }
 844
 845         if (ev.any.xkb_type != XkbStateNotify) {
 846             ELOG("No State Notify!\n");
 847             continue;
 848         }
 849
 850         unsigned int mods = ev.state.mods;
 851         modstate = mods & config.modifier;
 852     }
 853
 854 #define DLOGMOD(modmask, status) \
 855     do { \
 856         switch (modmask) { \
 857             case ShiftMask: \
 858                 DLOG("ShiftMask got " #status "!\n"); \
 859                 break; \
 860             case ControlMask: \
 861                 DLOG("ControlMask got " #status "!\n"); \
 862                 break; \
 863             case Mod1Mask: \
 864                 DLOG("Mod1Mask got " #status "!\n"); \
 865                 break; \
 866             case Mod2Mask: \
 867                 DLOG("Mod2Mask got " #status "!\n"); \
 868                 break; \
 869             case Mod3Mask: \
 870                 DLOG("Mod3Mask got " #status "!\n"); \
 871                 break; \
 872             case Mod4Mask: \
 873                 DLOG("Mod4Mask got " #status "!\n"); \
 874                 break; \
 875             case Mod5Mask: \
 876                 DLOG("Mod5Mask got " #status "!\n"); \
 877                 break; \
 878         } \
 879     } while (0)
 880
 881     if (modstate != mod_pressed) {
 882         if (modstate == 0) {
 883             DLOGMOD(config.modifier, released);
 884             if (!activated_mode)
 885                 hide_bars();
 886         } else {
 887             DLOGMOD(config.modifier, pressed);
 888             activated_mode = false;
 889             unhide_bars();
 890         }
 891         mod_pressed = modstate;
 892     }
 893
 894 #undef DLOGMOD
 895 }
 896
 897 /*
 898  * Early initialization of the connection to X11: Everything which does not
 899  * depend on 'config'.
 900  *
 901  */
 902 char *init_xcb_early() {
 903     /* FIXME: xcb_connect leaks Memory */
 904     xcb_connection = xcb_connect(NULL, &screen);
 905     if (xcb_connection_has_error(xcb_connection)) {
 906         ELOG("Cannot open display\n");
 907         exit(EXIT_FAILURE);
 908     }
 909     conn = xcb_connection;
 910     DLOG("Connected to xcb\n");
 911
 912     /* We have to request the atoms we need */
 913     #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
 914     #include "xcb_atoms.def"
 915
 916     root_screen = xcb_aux_get_screen(xcb_connection, screen);
 917     xcb_root = root_screen->root;
 918
 919     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
 920      * this way, we can choose to crop it */
 921     uint32_t mask = XCB_GC_FOREGROUND;
 922     uint32_t vals[] = { colors.bar_bg, colors.bar_bg };
 923
 924     statusline_clear = xcb_generate_id(xcb_connection);
 925     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 926                                                                statusline_clear,
 927                                                                xcb_root,
 928                                                                mask,
 929                                                                vals);
 930
 931     statusline_ctx = xcb_generate_id(xcb_connection);
 932     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
 933                                                             statusline_ctx,
 934                                                             xcb_root,
 935                                                             0,
 936                                                             NULL);
 937
 938     statusline_pm = xcb_generate_id(xcb_connection);
 939     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
 940                                                                root_screen->root_depth,
 941                                                                statusline_pm,
 942                                                                xcb_root,
 943                                                                root_screen->width_in_pixels,
 944                                                                root_screen->height_in_pixels);
 945
 946
 947     /* The various Watchers to communicate with xcb */
 948     xcb_io = smalloc(sizeof(ev_io));
 949     xcb_prep = smalloc(sizeof(ev_prepare));
 950     xcb_chk = smalloc(sizeof(ev_check));
 951
 952     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
 953     ev_prepare_init(xcb_prep, &xcb_prep_cb);
 954     ev_check_init(xcb_chk, &xcb_chk_cb);
 955
 956     ev_io_start(main_loop, xcb_io);
 957     ev_prepare_start(main_loop, xcb_prep);
 958     ev_check_start(main_loop, xcb_chk);
 959
 960     /* Now we get the atoms and save them in a nice data structure */
 961     get_atoms();
 962
 963     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
 964
 965     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
 966         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
 967         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
 968         exit(EXIT_FAILURE);
 969     }
 970
 971     return path;
 972 }
 973
 974 /*
 975  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key-events
 976  * involving that modifier, we sadly have to use xkb which is not yet fully supported
 977  * in xcb.
 978  *
 979  */
 980 void register_xkb_keyevents() {
 981     if (xkb_dpy == NULL) {
 982         int xkb_major, xkb_minor, xkb_errbase, xkb_err;
 983         xkb_major = XkbMajorVersion;
 984         xkb_minor = XkbMinorVersion;
 985
 986         xkb_dpy = XkbOpenDisplay(NULL,
 987                                  &xkb_event_base,
 988                                  &xkb_errbase,
 989                                  &xkb_major,
 990                                  &xkb_minor,
 991                                  &xkb_err);
 992
 993         if (xkb_dpy == NULL) {
 994             ELOG("No XKB!\n");
 995             exit(EXIT_FAILURE);
 996         }
 997
 998         if (fcntl(ConnectionNumber(xkb_dpy), F_SETFD, FD_CLOEXEC) == -1) {
 999             ELOG("Could not set FD_CLOEXEC on xkbdpy: %s\n", strerror(errno));
1000             exit(EXIT_FAILURE);
1001         }
1002
1003         int i1;
1004         if (!XkbQueryExtension(xkb_dpy, &i1, &xkb_event_base, &xkb_errbase, &xkb_major, &xkb_minor)) {
1005             ELOG("XKB not supported by X-server!\n");
1006             exit(EXIT_FAILURE);
1007         }
1008
1009         if (!XkbSelectEvents(xkb_dpy, XkbUseCoreKbd, XkbStateNotifyMask, XkbStateNotifyMask)) {
1010             ELOG("Could not grab Key!\n");
1011             exit(EXIT_FAILURE);
1012         }
1013
1014         xkb_io = smalloc(sizeof(ev_io));
1015         ev_io_init(xkb_io, &xkb_io_cb, ConnectionNumber(xkb_dpy), EV_READ);
1016         ev_io_start(main_loop, xkb_io);
1017         XFlush(xkb_dpy);
1018     }
1019 }
1020
1021 /*
1022  * Deregister from xkb keyevents.
1023  *
1024  */
1025 void deregister_xkb_keyevents() {
1026     if (xkb_dpy != NULL) {
1027         ev_io_stop (main_loop, xkb_io);
1028         XCloseDisplay(xkb_dpy);
1029         close(xkb_io->fd);
1030         FREE(xkb_io);
1031         xkb_dpy = NULL;
1032     }
1033 }
1034
1035 /*
1036  * Initialization which depends on 'config' being usable. Called after the
1037  * configuration has arrived.
1038  *
1039  */
1040 void init_xcb_late(char *fontname) {
1041     if (fontname == NULL)
1042         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1043
1044     /* Load the font */
1045     font = load_font(fontname, true);
1046     set_font(&font);
1047     DLOG("Calculated Font-height: %d\n", font.height);
1048     bar_height = font.height + 6;
1049
1050     xcb_flush(xcb_connection);
1051
1052     if (config.hide_on_modifier == M_HIDE)
1053         register_xkb_keyevents();
1054 }
1055
1056 /*
1057  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1058  * selection.
1059  *
1060  */
1061 static void send_tray_clientmessage(void) {
1062     uint8_t buffer[32] = { 0 };
1063     xcb_client_message_event_t *ev = (xcb_client_message_event_t*)buffer;
1064
1065     ev->response_type = XCB_CLIENT_MESSAGE;
1066     ev->window = xcb_root;
1067     ev->type = atoms[MANAGER];
1068     ev->format = 32;
1069     ev->data.data32[0] = XCB_CURRENT_TIME;
1070     ev->data.data32[1] = tray_reply->atom;
1071     ev->data.data32[2] = selwin;
1072
1073     xcb_send_event(xcb_connection,
1074                    0,
1075                    xcb_root,
1076                    0xFFFFFF,
1077                    (char*)buffer);
1078 }
1079
1080
1081 /*
1082  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1083  * for the X11 display we are running on, then acquiring the selection for this
1084  * atom. Afterwards, tray clients will send ClientMessages to our window.
1085  *
1086  */
1087 void init_tray(void) {
1088     DLOG("Initializing system tray functionality\n");
1089     /* request the tray manager atom for the X11 display we are running on */
1090     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1091     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1092     xcb_intern_atom_cookie_t tray_cookie;
1093     if (tray_reply == NULL)
1094         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1095
1096     /* tray support: we need a window to own the selection */
1097     selwin = xcb_generate_id(xcb_connection);
1098     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1099     uint32_t selval[] = { 1 };
1100     xcb_create_window(xcb_connection,
1101                       root_screen->root_depth,
1102                       selwin,
1103                       xcb_root,
1104                       -1, -1,
1105                       1, 1,
1106                       0,
1107                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1108                       root_screen->root_visual,
1109                       selmask,
1110                       selval);
1111
1112     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1113     /* set the atoms */
1114     xcb_change_property(xcb_connection,
1115                         XCB_PROP_MODE_REPLACE,
1116                         selwin,
1117                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1118                         XCB_ATOM_CARDINAL,
1119                         32,
1120                         1,
1121                         &orientation);
1122
1123     init_tray_colors();
1124
1125     if (tray_reply == NULL) {
1126         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1127             ELOG("Could not get atom %s\n", atomname);
1128             exit(EXIT_FAILURE);
1129         }
1130     }
1131
1132     xcb_set_selection_owner(xcb_connection,
1133                             selwin,
1134                             tray_reply->atom,
1135                             XCB_CURRENT_TIME);
1136
1137     /* Verify that we have the selection */
1138     xcb_get_selection_owner_cookie_t selcookie;
1139     xcb_get_selection_owner_reply_t *selreply;
1140
1141     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1142     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1143         ELOG("Could not get selection owner for %s\n", atomname);
1144         exit(EXIT_FAILURE);
1145     }
1146
1147     if (selreply->owner != selwin) {
1148         ELOG("Could not set the %s selection. " \
1149              "Maybe another tray is already running?\n", atomname);
1150         /* NOTE that this error is not fatal. We just can’t provide tray
1151          * functionality */
1152         free(selreply);
1153         return;
1154     }
1155
1156     send_tray_clientmessage();
1157 }
1158
1159 /*
1160  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1161  * to make GTK+ 3 applets with Symbolic Icons visible. If the colors are unset,
1162  * they assume a light background.
1163  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1164  *
1165  */
1166 void init_tray_colors(void) {
1167     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1168     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1169
1170     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1171
1172     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1173                             {bar_fg[3], bar_fg[4], '\0'},
1174                             {bar_fg[5], bar_fg[6], '\0'}};
1175     const uint8_t r = strtol(strgroups[0], NULL, 16);
1176     const uint8_t g = strtol(strgroups[1], NULL, 16);
1177     const uint8_t b = strtol(strgroups[2], NULL, 16);
1178
1179     const uint16_t r16 = ((uint16_t)r << 8) | r;
1180     const uint16_t g16 = ((uint16_t)g << 8) | g;
1181     const uint16_t b16 = ((uint16_t)b << 8) | b;
1182
1183     const uint32_t tray_colors[12] = {
1184         r16, g16, b16, /* foreground color */
1185         r16, g16, b16, /* error color */
1186         r16, g16, b16, /* warning color */
1187         r16, g16, b16, /* success color */
1188     };
1189
1190     xcb_change_property(xcb_connection,
1191                         XCB_PROP_MODE_REPLACE,
1192                         selwin,
1193                         atoms[_NET_SYSTEM_TRAY_COLORS],
1194                         XCB_ATOM_CARDINAL,
1195                         32,
1196                         12,
1197                         tray_colors);
1198 }
1199
1200 /*
1201  * Cleanup the xcb-stuff.
1202  * Called once, before the program terminates.
1203  *
1204  */
1205 void clean_xcb(void) {
1206     i3_output *o_walk;
1207     free_workspaces();
1208     SLIST_FOREACH(o_walk, outputs, slist) {
1209         destroy_window(o_walk);
1210         FREE(o_walk->trayclients);
1211         FREE(o_walk->workspaces);
1212         FREE(o_walk->name);
1213     }
1214     FREE_SLIST(outputs, i3_output);
1215     FREE(outputs);
1216
1217     xcb_flush(xcb_connection);
1218     xcb_disconnect(xcb_connection);
1219
1220     ev_check_stop(main_loop, xcb_chk);
1221     ev_prepare_stop(main_loop, xcb_prep);
1222     ev_io_stop(main_loop, xcb_io);
1223
1224     FREE(xcb_chk);
1225     FREE(xcb_prep);
1226     FREE(xcb_io);
1227 }
1228
1229 /*
1230  * Get the earlier requested atoms and save them in the prepared data structure
1231  *
1232  */
1233 void get_atoms(void) {
1234     xcb_intern_atom_reply_t *reply;
1235     #define ATOM_DO(name) reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1236         if (reply == NULL) { \
1237             ELOG("Could not get atom %s\n", #name); \
1238             exit(EXIT_FAILURE); \
1239         } \
1240         atoms[name] = reply->atom; \
1241         free(reply);
1242
1243     #include "xcb_atoms.def"
1244     DLOG("Got Atoms\n");
1245 }
1246
1247 /*
1248  * Reparents all tray clients of the specified output to the root window. This
1249  * is either used when shutting down, when an output appears (xrandr --output
1250  * VGA1 --off) or when the primary output changes.
1251  *
1252  * Applications using the tray will start the protocol from the beginning again
1253  * afterwards.
1254  *
1255  */
1256 void kick_tray_clients(i3_output *output) {
1257     if (TAILQ_EMPTY(output->trayclients))
1258         return;
1259
1260     trayclient *trayclient;
1261     while (!TAILQ_EMPTY(output->trayclients)) {
1262         trayclient = TAILQ_FIRST(output->trayclients);
1263         /* Unmap, then reparent (to root) the tray client windows */
1264         xcb_unmap_window(xcb_connection, trayclient->win);
1265         xcb_reparent_window(xcb_connection,
1266                             trayclient->win,
1267                             xcb_root,
1268                             0,
1269                             0);
1270
1271         /* We remove the trayclient right here. We might receive an UnmapNotify
1272          * event afterwards, but better safe than sorry. */
1273         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1274     }
1275
1276     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1277      * We cannot actually destroy the window because then Qt will not restore
1278      * its event mask on the new window. */
1279     uint8_t buffer[32] = { 0 };
1280     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t*)buffer;
1281
1282     event->response_type = XCB_DESTROY_NOTIFY;
1283     event->event = selwin;
1284     event->window = selwin;
1285
1286     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char*)event);
1287
1288     send_tray_clientmessage();
1289 }
1290
1291 /*
1292  * Destroy the bar of the specified output
1293  *
1294  */
1295 void destroy_window(i3_output *output) {
1296     if (output == NULL) {
1297         return;
1298     }
1299     if (output->bar == XCB_NONE) {
1300         return;
1301     }
1302
1303     kick_tray_clients(output);
1304     xcb_destroy_window(xcb_connection, output->bar);
1305     output->bar = XCB_NONE;
1306 }
1307
1308 /*
1309  * Reallocate the statusline-buffer
1310  *
1311  */
1312 void realloc_sl_buffer(void) {
1313     DLOG("Re-allocating statusline-buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1314          statusline_width, root_screen->width_in_pixels);
1315     xcb_free_pixmap(xcb_connection, statusline_pm);
1316     statusline_pm = xcb_generate_id(xcb_connection);
1317     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1318                                                                root_screen->root_depth,
1319                                                                statusline_pm,
1320                                                                xcb_root,
1321                                                                MAX(root_screen->width_in_pixels, statusline_width),
1322                                                                bar_height);
1323
1324     uint32_t mask = XCB_GC_FOREGROUND;
1325     uint32_t vals[2] = { colors.bar_bg, colors.bar_bg };
1326     xcb_free_gc(xcb_connection, statusline_clear);
1327     statusline_clear = xcb_generate_id(xcb_connection);
1328     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1329                                                                statusline_clear,
1330                                                                xcb_root,
1331                                                                mask,
1332                                                                vals);
1333
1334     mask |= XCB_GC_BACKGROUND;
1335     vals[0] = colors.bar_fg;
1336     statusline_ctx = xcb_generate_id(xcb_connection);
1337     xcb_free_gc(xcb_connection, statusline_ctx);
1338     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1339                                                             statusline_ctx,
1340                                                             xcb_root,
1341                                                             mask,
1342                                                             vals);
1343
1344     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline-buffer") ||
1345         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline-buffer-clearcontext") ||
1346         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline-buffer-context")) {
1347         exit(EXIT_FAILURE);
1348     }
1349
1350 }
1351
1352 /*
1353  * Reconfigure all bars and create new bars for recently activated outputs
1354  *
1355  */
1356 void reconfig_windows(bool redraw_bars) {
1357     uint32_t mask;
1358     uint32_t values[5];
1359     static bool tray_configured = false;
1360
1361     i3_output *walk;
1362     SLIST_FOREACH(walk, outputs, slist) {
1363         if (!walk->active) {
1364             /* If an output is not active, we destroy its bar */
1365             /* FIXME: Maybe we rather want to unmap? */
1366             DLOG("Destroying window for output %s\n", walk->name);
1367             destroy_window(walk);
1368             continue;
1369         }
1370         if (walk->bar == XCB_NONE) {
1371             DLOG("Creating Window for output %s\n", walk->name);
1372
1373             walk->bar = xcb_generate_id(xcb_connection);
1374             walk->buffer = xcb_generate_id(xcb_connection);
1375             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1376             /* Black background */
1377             values[0] = colors.bar_bg;
1378             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar-windows */
1379             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1380             /* We enable the following EventMask fields:
1381              * EXPOSURE, to get expose events (we have to re-draw then)
1382              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1383              *                        child windows use ConfigureWindow
1384              * BUTTON_PRESS, to handle clicks on the workspace buttons
1385              * */
1386             values[2] = XCB_EVENT_MASK_EXPOSURE |
1387                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;
1388             if (!config.disable_ws) {
1389                 values[2] |= XCB_EVENT_MASK_BUTTON_PRESS;
1390             }
1391             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1392                                                                      root_screen->root_depth,
1393                                                                      walk->bar,
1394                                                                      xcb_root,
1395                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1396                                                                      walk->rect.w, bar_height,
1397                                                                      0,
1398                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1399                                                                      root_screen->root_visual,
1400                                                                      mask,
1401                                                                      values);
1402
1403             /* The double-buffer we use to render stuff off-screen */
1404             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1405                                                                     root_screen->root_depth,
1406                                                                     walk->buffer,
1407                                                                     walk->bar,
1408                                                                     walk->rect.w,
1409                                                                     bar_height);
1410
1411             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1412             xcb_void_cookie_t class_cookie;
1413             class_cookie = xcb_change_property(xcb_connection,
1414                                                XCB_PROP_MODE_REPLACE,
1415                                                walk->bar,
1416                                                XCB_ATOM_WM_CLASS,
1417                                                XCB_ATOM_STRING,
1418                                                8,
1419                                                (strlen("i3bar") + 1) * 2,
1420                                                "i3bar\0i3bar\0");
1421
1422             char *name;
1423             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1424                 err(EXIT_FAILURE, "asprintf()");
1425             xcb_void_cookie_t name_cookie;
1426             name_cookie = xcb_change_property(xcb_connection,
1427                                               XCB_PROP_MODE_REPLACE,
1428                                               walk->bar,
1429                                               XCB_ATOM_WM_NAME,
1430                                               XCB_ATOM_STRING,
1431                                               8,
1432                                               strlen(name),
1433                                               name);
1434             free(name);
1435
1436             /* We want dock-windows (for now). When override_redirect is set, i3 is ignoring
1437              * this one */
1438             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1439                                                                 XCB_PROP_MODE_REPLACE,
1440                                                                 walk->bar,
1441                                                                 atoms[_NET_WM_WINDOW_TYPE],
1442                                                                 XCB_ATOM_ATOM,
1443                                                                 32,
1444                                                                 1,
1445                                                                 (unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1446
1447             /* We need to tell i3, where to reserve space for i3bar */
1448             /* left, right, top, bottom, left_start_y, left_end_y,
1449              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1450              * bottom_end_x */
1451             /* A local struct to save the strut_partial property */
1452             struct {
1453                 uint32_t left;
1454                 uint32_t right;
1455                 uint32_t top;
1456                 uint32_t bottom;
1457                 uint32_t left_start_y;
1458                 uint32_t left_end_y;
1459                 uint32_t right_start_y;
1460                 uint32_t right_end_y;
1461                 uint32_t top_start_x;
1462                 uint32_t top_end_x;
1463                 uint32_t bottom_start_x;
1464                 uint32_t bottom_end_x;
1465             } __attribute__((__packed__)) strut_partial = {0,};
1466             switch (config.position) {
1467                 case POS_NONE:
1468                     break;
1469                 case POS_TOP:
1470                     strut_partial.top = bar_height;
1471                     strut_partial.top_start_x = walk->rect.x;
1472                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1473                     break;
1474                 case POS_BOT:
1475                     strut_partial.bottom = bar_height;
1476                     strut_partial.bottom_start_x = walk->rect.x;
1477                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1478                     break;
1479             }
1480             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1481                                                                  XCB_PROP_MODE_REPLACE,
1482                                                                  walk->bar,
1483                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1484                                                                  XCB_ATOM_CARDINAL,
1485                                                                  32,
1486                                                                  12,
1487                                                                  &strut_partial);
1488
1489             /* We also want a graphics-context for the bars (it defines the properties
1490              * with which we draw to them) */
1491             walk->bargc = xcb_generate_id(xcb_connection);
1492             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1493                                                                 walk->bargc,
1494                                                                 walk->bar,
1495                                                                 0,
1496                                                                 NULL);
1497
1498             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1499             xcb_void_cookie_t map_cookie;
1500             if (config.hide_on_modifier == M_DOCK) {
1501                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1502             }
1503
1504             if (xcb_request_failed(win_cookie,   "Could not create window") ||
1505                 xcb_request_failed(pm_cookie,    "Could not create pixmap") ||
1506                 xcb_request_failed(dock_cookie,  "Could not set dock mode") ||
1507                 xcb_request_failed(class_cookie, "Could not set WM_CLASS")  ||
1508                 xcb_request_failed(name_cookie,  "Could not set WM_NAME")   ||
1509                 xcb_request_failed(strut_cookie, "Could not set strut")     ||
1510                 xcb_request_failed(gc_cookie,    "Could not create graphical context") ||
1511                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1512                 exit(EXIT_FAILURE);
1513             }
1514
1515             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1516             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1517                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1518                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1519                  * VGA-1 but output == [HDMI-1]).
1520                  */
1521                 i3_output *output;
1522                 SLIST_FOREACH(output, outputs, slist) {
1523                     if (strcasecmp(output->name, tray_output) == 0 ||
1524                             (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1525                         init_tray();
1526                         break;
1527                     }
1528                 }
1529                 tray_configured = true;
1530             }
1531         } else {
1532             /* We already have a bar, so we just reconfigure it */
1533             mask = XCB_CONFIG_WINDOW_X |
1534                    XCB_CONFIG_WINDOW_Y |
1535                    XCB_CONFIG_WINDOW_WIDTH |
1536                    XCB_CONFIG_WINDOW_HEIGHT |
1537                    XCB_CONFIG_WINDOW_STACK_MODE;
1538             values[0] = walk->rect.x;
1539             values[1] = walk->rect.y + walk->rect.h - bar_height;
1540             values[2] = walk->rect.w;
1541             values[3] = bar_height;
1542             values[4] = XCB_STACK_MODE_ABOVE;
1543
1544             DLOG("Destroying buffer for output %s\n", walk->name);
1545             xcb_free_pixmap(xcb_connection, walk->buffer);
1546
1547             DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1548             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1549                                                                         walk->bar,
1550                                                                         mask,
1551                                                                         values);
1552
1553             mask = XCB_CW_OVERRIDE_REDIRECT;
1554             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1555             DLOG("Changing Window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1556             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1557                                                                         walk->bar,
1558                                                                         mask,
1559                                                                         values);
1560
1561             DLOG("Recreating buffer for output %s\n", walk->name);
1562             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1563                                                                     root_screen->root_depth,
1564                                                                     walk->buffer,
1565                                                                     walk->bar,
1566                                                                     walk->rect.w,
1567                                                                     bar_height);
1568
1569             xcb_void_cookie_t map_cookie, umap_cookie;
1570             if (redraw_bars) {
1571                 /* Unmap the window, and draw it again when in dock mode */
1572                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar);
1573                 if (config.hide_on_modifier == M_DOCK) {
1574                     cont_child();
1575                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1576                 } else {
1577                     stop_child();
1578                 }
1579
1580                 if (config.hide_on_modifier == M_HIDE) {
1581                     /* Switching to hide mode, register for keyevents */
1582                     register_xkb_keyevents();
1583                 } else {
1584                     /* Switching to dock/invisible mode, deregister from keyevents */
1585                     deregister_xkb_keyevents();
1586                 }
1587             }
1588
1589             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1590                 xcb_request_failed(chg_cookie, "Could not change window") ||
1591                 xcb_request_failed(pm_cookie,  "Could not create pixmap") ||
1592                 (redraw_bars && (xcb_request_failed(umap_cookie,  "Could not unmap window") ||
1593                 (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1594                 exit(EXIT_FAILURE);
1595             }
1596         }
1597     }
1598 }
1599
1600 /*
1601  * Render the bars, with buttons and statusline
1602  *
1603  */
1604 void draw_bars(bool unhide) {
1605     DLOG("Drawing Bars...\n");
1606     int i = 0;
1607
1608     refresh_statusline();
1609
1610     i3_output *outputs_walk;
1611     SLIST_FOREACH(outputs_walk, outputs, slist) {
1612         if (!outputs_walk->active) {
1613             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1614             continue;
1615         }
1616         if (outputs_walk->bar == XCB_NONE) {
1617             /* Oh shit, an active output without an own bar. Create it now! */
1618             reconfig_windows(false);
1619         }
1620         /* First things first: clear the backbuffer */
1621         uint32_t color = colors.bar_bg;
1622         xcb_change_gc(xcb_connection,
1623                       outputs_walk->bargc,
1624                       XCB_GC_FOREGROUND,
1625                       &color);
1626         xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, bar_height };
1627         xcb_poly_fill_rectangle(xcb_connection,
1628                                 outputs_walk->buffer,
1629                                 outputs_walk->bargc,
1630                                 1,
1631                                 &rect);
1632
1633         if (!TAILQ_EMPTY(&statusline_head)) {
1634             DLOG("Printing statusline!\n");
1635
1636             /* Luckily we already prepared a seperate pixmap containing the rendered
1637              * statusline, we just have to copy the relevant parts to the relevant
1638              * position */
1639             trayclient *trayclient;
1640             int traypx = 0;
1641             TAILQ_FOREACH(trayclient, outputs_walk->trayclients, tailq) {
1642                 if (!trayclient->mapped)
1643                     continue;
1644                 /* We assume the tray icons are quadratic (we use the font
1645                  * *height* as *width* of the icons) because we configured them
1646                  * like this. */
1647                 traypx += font.height + 2;
1648             }
1649             /* Add 2px of padding if there are any tray icons */
1650             if (traypx > 0)
1651                 traypx += 2;
1652             xcb_copy_area(xcb_connection,
1653                           statusline_pm,
1654                           outputs_walk->buffer,
1655                           outputs_walk->bargc,
1656                           MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
1657                           MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
1658                           MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height + 2);
1659         }
1660
1661         if (!config.disable_ws) {
1662             i3_ws *ws_walk;
1663             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1664                 DLOG("Drawing Button for WS %s at x = %d, len = %d\n",
1665                      i3string_as_utf8(ws_walk->name), i, ws_walk->name_width);
1666                 uint32_t fg_color = colors.inactive_ws_fg;
1667                 uint32_t bg_color = colors.inactive_ws_bg;
1668                 uint32_t border_color = colors.inactive_ws_border;
1669                 if (ws_walk->visible) {
1670                     if (!ws_walk->focused) {
1671                         fg_color = colors.active_ws_fg;
1672                         bg_color = colors.active_ws_bg;
1673                         border_color = colors.active_ws_border;
1674                     } else {
1675                         fg_color = colors.focus_ws_fg;
1676                         bg_color = colors.focus_ws_bg;
1677                         border_color = colors.focus_ws_border;
1678                     }
1679                 }
1680                 if (ws_walk->urgent) {
1681                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1682                     fg_color = colors.urgent_ws_fg;
1683                     bg_color = colors.urgent_ws_bg;
1684                     border_color = colors.urgent_ws_border;
1685                     unhide = true;
1686                 }
1687                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1688                 uint32_t vals_border[] = { border_color, border_color };
1689                 xcb_change_gc(xcb_connection,
1690                               outputs_walk->bargc,
1691                               mask,
1692                               vals_border);
1693                 xcb_rectangle_t rect_border = { i, 1, ws_walk->name_width + 10, font.height + 4 };
1694                 xcb_poly_fill_rectangle(xcb_connection,
1695                                         outputs_walk->buffer,
1696                                         outputs_walk->bargc,
1697                                         1,
1698                                         &rect_border);
1699                 uint32_t vals[] = { bg_color, bg_color };
1700                 xcb_change_gc(xcb_connection,
1701                               outputs_walk->bargc,
1702                               mask,
1703                               vals);
1704                 xcb_rectangle_t rect = { i + 1, 2, ws_walk->name_width + 8, font.height + 2 };
1705                 xcb_poly_fill_rectangle(xcb_connection,
1706                                         outputs_walk->buffer,
1707                                         outputs_walk->bargc,
1708                                         1,
1709                                         &rect);
1710                 set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1711                 draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc,
1712                           i + 5, 3, ws_walk->name_width);
1713                 i += 10 + ws_walk->name_width + 1;
1714
1715             }
1716         }
1717
1718         if (binding.name && !config.disable_binding_mode_indicator) {
1719             uint32_t fg_color = colors.urgent_ws_fg;
1720             uint32_t bg_color = colors.urgent_ws_bg;
1721             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1722
1723             uint32_t vals_border[] = { colors.urgent_ws_border, colors.urgent_ws_border };
1724             xcb_change_gc(xcb_connection,
1725                           outputs_walk->bargc,
1726                           mask,
1727                           vals_border);
1728             xcb_rectangle_t rect_border = { i, 1, binding.width + 10, font.height + 4 };
1729             xcb_poly_fill_rectangle(xcb_connection,
1730                                     outputs_walk->buffer,
1731                                     outputs_walk->bargc,
1732                                     1,
1733                                     &rect_border);
1734
1735             uint32_t vals[] = { bg_color, bg_color };
1736             xcb_change_gc(xcb_connection,
1737                           outputs_walk->bargc,
1738                           mask,
1739                           vals);
1740             xcb_rectangle_t rect = { i + 1, 2, binding.width + 8, font.height + 2 };
1741             xcb_poly_fill_rectangle(xcb_connection,
1742                                     outputs_walk->buffer,
1743                                     outputs_walk->bargc,
1744                                     1,
1745                                     &rect);
1746
1747             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1748             draw_text(binding.name, outputs_walk->buffer, outputs_walk->bargc, i + 5, 3, binding.width);
1749
1750             unhide = true;
1751         }
1752
1753         i = 0;
1754     }
1755
1756     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1757     if (mod_pressed ||
1758             config.hidden_state == S_SHOW ||
1759             unhide) {
1760         unhide_bars();
1761     } else if (config.hide_on_modifier == M_HIDE) {
1762         hide_bars();
1763     }
1764
1765     redraw_bars();
1766 }
1767
1768 /*
1769  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1770  *
1771  */
1772 void redraw_bars(void) {
1773     i3_output *outputs_walk;
1774     SLIST_FOREACH(outputs_walk, outputs, slist) {
1775         if (!outputs_walk->active) {
1776             continue;
1777         }
1778         xcb_copy_area(xcb_connection,
1779                       outputs_walk->buffer,
1780                       outputs_walk->bar,
1781                       outputs_walk->bargc,
1782                       0, 0,
1783                       0, 0,
1784                       outputs_walk->rect.w,
1785                       outputs_walk->rect.h);
1786         xcb_flush(xcb_connection);
1787     }
1788 }
1789
1790 /*
1791  * Set the current binding mode
1792  *
1793  */
1794 void set_current_mode(struct mode *current) {
1795     I3STRING_FREE(binding.name);
1796     binding = *current;
1797     activated_mode = binding.name != NULL;
1798     return;
1799 }