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/xkb.h>
  12 #include <xcb/xproto.h>
  13 #include <xcb/xcb_aux.h>
  14
  15 #ifdef XCB_COMPAT
  16 #include "xcb_compat.h"
  17 #endif
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <i3/ipc.h>
  25 #include <ev.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <err.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/XKBlib.h>
  32 #include <X11/extensions/XKB.h>
  33
  34 #include "common.h"
  35 #include "libi3.h"
  36
  37 /* We save the Atoms in an easy to access array, indexed by an enum */
  38 enum {
  39 #define ATOM_DO(name) name,
  40 #include "xcb_atoms.def"
  41     NUM_ATOMS
  42 };
  43
  44 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  45 xcb_atom_t atoms[NUM_ATOMS];
  46
  47 /* Variables, that are the same for all functions at all times */
  48 xcb_connection_t *xcb_connection;
  49 int screen;
  50 xcb_screen_t *root_screen;
  51 xcb_window_t xcb_root;
  52
  53 /* selection window for tray support */
  54 static xcb_window_t selwin = XCB_NONE;
  55 static xcb_intern_atom_reply_t *tray_reply = NULL;
  56
  57 /* This is needed for integration with libi3 */
  58 xcb_connection_t *conn;
  59
  60 /* The font we'll use */
  61 static i3Font font;
  62
  63 /* Overall height of the bar (based on font size) */
  64 int bar_height;
  65
  66 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  67 int xkb_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 /* Horizontal offset between a workspace label and button borders */
 110 const static int ws_hoff_px = 4;
 111
 112 /* Vertical offset between a workspace label and button borders */
 113 const static int ws_voff_px = 3;
 114
 115 /* Offset between two workspace buttons */
 116 const static int ws_spacing_px = 1;
 117
 118 /* Offset between the statusline and 1) workspace buttons on the left
 119  *                                   2) the tray or screen edge on the right */
 120 const static int sb_hoff_px = 4;
 121
 122 /* Additional offset between the tray and the statusline, if the tray is not empty */
 123 const static int tray_loff_px = 2;
 124
 125 /* Vertical offset between the bar and a separator */
 126 const static int sep_voff_px = 4;
 127
 128 /* We define xcb_request_failed as a macro to include the relevant line number */
 129 #define xcb_request_failed(cookie, err_msg) _xcb_request_failed(cookie, err_msg, __LINE__)
 130 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 131     xcb_generic_error_t *err;
 132     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 133         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 134         return err->error_code;
 135     }
 136     return 0;
 137 }
 138
 139 uint32_t get_sep_offset(struct status_block *block) {
 140     if (!block->no_separator && block->sep_block_width > 0)
 141         return block->sep_block_width / 2 + block->sep_block_width % 2;
 142     return 0;
 143 }
 144
 145 int get_tray_width(struct tc_head *trayclients) {
 146     trayclient *trayclient;
 147     int tray_width = 0;
 148     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 149         if (!trayclient->mapped)
 150             continue;
 151         tray_width += font.height + logical_px(2);
 152     }
 153     if (tray_width > 0)
 154         tray_width += logical_px(tray_loff_px);
 155     return tray_width;
 156 }
 157
 158 /*
 159  * Redraws the statusline to the buffer
 160  *
 161  */
 162 void refresh_statusline(bool use_short_text) {
 163     struct status_block *block;
 164
 165     uint32_t old_statusline_width = statusline_width;
 166     statusline_width = 0;
 167
 168     /* Predict the text width of all blocks (in pixels). */
 169     TAILQ_FOREACH(block, &statusline_head, blocks) {
 170         /* Try to use the shorter text if necessary and possible. */
 171         if (use_short_text && block->short_text != NULL) {
 172             I3STRING_FREE(block->full_text);
 173             block->full_text = i3string_copy(block->short_text);
 174         }
 175
 176         if (i3string_get_num_bytes(block->full_text) == 0)
 177             continue;
 178
 179         block->width = predict_text_width(block->full_text);
 180
 181         /* Compute offset and append for text aligment in min_width. */
 182         if (block->min_width <= block->width) {
 183             block->x_offset = 0;
 184             block->x_append = 0;
 185         } else {
 186             uint32_t padding_width = block->min_width - block->width;
 187             switch (block->align) {
 188                 case ALIGN_LEFT:
 189                     block->x_append = padding_width;
 190                     break;
 191                 case ALIGN_RIGHT:
 192                     block->x_offset = padding_width;
 193                     break;
 194                 case ALIGN_CENTER:
 195                     block->x_offset = padding_width / 2;
 196                     block->x_append = padding_width / 2 + padding_width % 2;
 197                     break;
 198             }
 199         }
 200
 201         /* If this is not the last block, add some pixels for a separator. */
 202         if (TAILQ_NEXT(block, blocks) != NULL)
 203             statusline_width += block->sep_block_width;
 204
 205         statusline_width += block->width + block->x_offset + block->x_append;
 206     }
 207
 208     /* If the statusline is bigger than our screen we need to make sure that
 209      * the pixmap provides enough space, so re-allocate if the width grew */
 210     if (statusline_width > root_screen->width_in_pixels &&
 211         statusline_width > old_statusline_width)
 212         realloc_sl_buffer();
 213
 214     /* Clear the statusline pixmap. */
 215     xcb_rectangle_t rect = {0, 0, MAX(root_screen->width_in_pixels, statusline_width), bar_height};
 216     xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
 217
 218     /* Draw the text of each block. */
 219     uint32_t x = 0;
 220     TAILQ_FOREACH(block, &statusline_head, blocks) {
 221         if (i3string_get_num_bytes(block->full_text) == 0)
 222             continue;
 223         uint32_t fg_color;
 224
 225         /* If this block is urgent, draw it with the defined color and border. */
 226         if (block->urgent) {
 227             fg_color = colors.urgent_ws_fg;
 228
 229             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
 230
 231             /* Draw the background */
 232             uint32_t bg_color = colors.urgent_ws_bg;
 233             uint32_t bg_values[] = {bg_color, bg_color};
 234             xcb_change_gc(xcb_connection, statusline_ctx, mask, bg_values);
 235
 236             /* The urgent background “overshoots” by 2 px so that the text that
 237              * is printed onto it will not be look so cut off. */
 238             xcb_rectangle_t bg_rect = {x - logical_px(2), logical_px(1), block->width + logical_px(4), bar_height - logical_px(2)};
 239             xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_ctx, 1, &bg_rect);
 240         } else {
 241             fg_color = (block->color ? get_colorpixel(block->color) : colors.bar_fg);
 242         }
 243
 244         set_font_colors(statusline_ctx, fg_color, colors.bar_bg);
 245         draw_text(block->full_text, statusline_pm, statusline_ctx, x + block->x_offset, logical_px(ws_voff_px), block->width);
 246         x += block->width + block->sep_block_width + block->x_offset + block->x_append;
 247
 248         uint32_t sep_offset = get_sep_offset(block);
 249         if (TAILQ_NEXT(block, blocks) != NULL && sep_offset > 0) {
 250             /* This is not the last block, draw a separator. */
 251             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_LINE_WIDTH;
 252             uint32_t values[] = {colors.sep_fg, colors.bar_bg, logical_px(1)};
 253             xcb_change_gc(xcb_connection, statusline_ctx, mask, values);
 254             xcb_poly_line(xcb_connection, XCB_COORD_MODE_ORIGIN, statusline_pm,
 255                           statusline_ctx, 2,
 256                           (xcb_point_t[]){{x - sep_offset, logical_px(sep_voff_px)},
 257                                           {x - sep_offset, bar_height - logical_px(sep_voff_px)}});
 258         }
 259     }
 260 }
 261
 262 /*
 263  * Hides all bars (unmaps them)
 264  *
 265  */
 266 void hide_bars(void) {
 267     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 268         return;
 269     }
 270
 271     i3_output *walk;
 272     SLIST_FOREACH(walk, outputs, slist) {
 273         if (!walk->active) {
 274             continue;
 275         }
 276         xcb_unmap_window(xcb_connection, walk->bar);
 277     }
 278     stop_child();
 279 }
 280
 281 /*
 282  * Unhides all bars (maps them)
 283  *
 284  */
 285 void unhide_bars(void) {
 286     if (config.hide_on_modifier != M_HIDE) {
 287         return;
 288     }
 289
 290     i3_output *walk;
 291     xcb_void_cookie_t cookie;
 292     uint32_t mask;
 293     uint32_t values[5];
 294
 295     cont_child();
 296
 297     SLIST_FOREACH(walk, outputs, slist) {
 298         if (walk->bar == XCB_NONE) {
 299             continue;
 300         }
 301         mask = XCB_CONFIG_WINDOW_X |
 302                XCB_CONFIG_WINDOW_Y |
 303                XCB_CONFIG_WINDOW_WIDTH |
 304                XCB_CONFIG_WINDOW_HEIGHT |
 305                XCB_CONFIG_WINDOW_STACK_MODE;
 306         values[0] = walk->rect.x;
 307         if (config.position == POS_TOP)
 308             values[1] = walk->rect.y;
 309         else
 310             values[1] = walk->rect.y + walk->rect.h - bar_height;
 311         values[2] = walk->rect.w;
 312         values[3] = bar_height;
 313         values[4] = XCB_STACK_MODE_ABOVE;
 314         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 315         cookie = xcb_configure_window_checked(xcb_connection,
 316                                               walk->bar,
 317                                               mask,
 318                                               values);
 319
 320         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 321             exit(EXIT_FAILURE);
 322         }
 323         xcb_map_window(xcb_connection, walk->bar);
 324     }
 325 }
 326
 327 /*
 328  * Parse the colors into a format that we can use
 329  *
 330  */
 331 void init_colors(const struct xcb_color_strings_t *new_colors) {
 332 #define PARSE_COLOR(name, def)                                                   \
 333     do {                                                                         \
 334         colors.name = get_colorpixel(new_colors->name ? new_colors->name : def); \
 335     } while (0)
 336     PARSE_COLOR(bar_fg, "#FFFFFF");
 337     PARSE_COLOR(bar_bg, "#000000");
 338     PARSE_COLOR(sep_fg, "#666666");
 339     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 340     PARSE_COLOR(active_ws_bg, "#333333");
 341     PARSE_COLOR(active_ws_border, "#333333");
 342     PARSE_COLOR(inactive_ws_fg, "#888888");
 343     PARSE_COLOR(inactive_ws_bg, "#222222");
 344     PARSE_COLOR(inactive_ws_border, "#333333");
 345     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 346     PARSE_COLOR(urgent_ws_bg, "#900000");
 347     PARSE_COLOR(urgent_ws_border, "#2f343a");
 348     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 349     PARSE_COLOR(focus_ws_bg, "#285577");
 350     PARSE_COLOR(focus_ws_border, "#4c7899");
 351 #undef PARSE_COLOR
 352
 353     init_tray_colors();
 354     xcb_flush(xcb_connection);
 355 }
 356
 357 /*
 358  * Handle a button press event (i.e. a mouse click on one of our bars).
 359  * We determine, whether the click occured on a workspace button or if the scroll-
 360  * wheel was used and change the workspace appropriately
 361  *
 362  */
 363 void handle_button(xcb_button_press_event_t *event) {
 364     /* Determine, which bar was clicked */
 365     i3_output *walk;
 366     xcb_window_t bar = event->event;
 367     SLIST_FOREACH(walk, outputs, slist) {
 368         if (walk->bar == bar) {
 369             break;
 370         }
 371     }
 372
 373     if (walk == NULL) {
 374         DLOG("Unknown bar clicked!\n");
 375         return;
 376     }
 377
 378     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 379     int32_t original_x = x;
 380
 381     DLOG("Got button %d\n", event->detail);
 382
 383     int workspace_width = 0;
 384     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 385
 386     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 387         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 388         if (x >= workspace_width && x <= workspace_width + w)
 389             clicked_ws = ws_walk;
 390         if (ws_walk->visible)
 391             cur_ws = ws_walk;
 392         workspace_width += w;
 393         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 394             workspace_width += logical_px(ws_spacing_px);
 395     }
 396
 397     if (x > workspace_width && child_want_click_events()) {
 398         /* If the child asked for click events,
 399          * check if a status block has been clicked. */
 400         int tray_width = get_tray_width(walk->trayclients);
 401         int block_x = 0, last_block_x;
 402         int offset = walk->rect.w - statusline_width - tray_width - logical_px(sb_hoff_px);
 403
 404         x = original_x - offset;
 405         if (x >= 0) {
 406             struct status_block *block;
 407             int sep_offset_remainder = 0;
 408
 409             TAILQ_FOREACH(block, &statusline_head, blocks) {
 410                 if (i3string_get_num_bytes(block->full_text) == 0)
 411                     continue;
 412
 413                 last_block_x = block_x;
 414                 block_x += block->width + block->x_offset + block->x_append + get_sep_offset(block) + sep_offset_remainder;
 415
 416                 if (x <= block_x && x >= last_block_x) {
 417                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 418                     return;
 419                 }
 420
 421                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 422             }
 423         }
 424         x = original_x;
 425     }
 426
 427     if (cur_ws == NULL) {
 428         DLOG("No workspace active?\n");
 429         return;
 430     }
 431
 432     switch (event->detail) {
 433         case 4:
 434             /* Mouse wheel up. We select the previous ws, if any.
 435              * If there is no more workspace, don’t even send the workspace
 436              * command, otherwise (with workspace auto_back_and_forth) we’d end
 437              * up on the wrong workspace. */
 438
 439             /* If `wheel_up_cmd [COMMAND]` was specified, it should override
 440              * the default behavior */
 441             if (config.wheel_up_cmd) {
 442                 i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, config.wheel_up_cmd);
 443                 return;
 444             }
 445
 446             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 447                 return;
 448
 449             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 450             break;
 451         case 5:
 452             /* Mouse wheel down. We select the next ws, if any.
 453              * If there is no more workspace, don’t even send the workspace
 454              * command, otherwise (with workspace auto_back_and_forth) we’d end
 455              * up on the wrong workspace. */
 456
 457             /* if `wheel_down_cmd [COMMAND]` was specified, it should override
 458              * the default behavior */
 459             if (config.wheel_down_cmd) {
 460                 i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, config.wheel_down_cmd);
 461                 return;
 462             }
 463
 464             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 465                 return;
 466
 467             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 468             break;
 469         case 1:
 470             cur_ws = clicked_ws;
 471
 472             /* if no workspace was clicked, focus our currently visible
 473              * workspace if it is not already focused */
 474             if (cur_ws == NULL) {
 475                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 476                     if (cur_ws->visible && !cur_ws->focused)
 477                         break;
 478                 }
 479             }
 480
 481             /* if there is nothing to focus, we are done */
 482             if (cur_ws == NULL)
 483                 return;
 484
 485             break;
 486         default:
 487             return;
 488     }
 489
 490     /* To properly handle workspace names with double quotes in them, we need
 491      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 492      * first count the number of double quotes, then we allocate a large enough
 493      * buffer, then we copy character by character. */
 494     int num_quotes = 0;
 495     size_t namelen = 0;
 496     const char *utf8_name = cur_ws->canonical_name;
 497     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 498         if (*walk == '"')
 499             num_quotes++;
 500         /* While we’re looping through the name anyway, we can save one
 501          * strlen(). */
 502         namelen++;
 503     }
 504
 505     const size_t len = namelen + strlen("workspace \"\"") + 1;
 506     char *buffer = scalloc(len + num_quotes);
 507     strncpy(buffer, "workspace \"", strlen("workspace \""));
 508     size_t inpos, outpos;
 509     for (inpos = 0, outpos = strlen("workspace \"");
 510          inpos < namelen;
 511          inpos++, outpos++) {
 512         if (utf8_name[inpos] == '"') {
 513             buffer[outpos] = '\\';
 514             outpos++;
 515         }
 516         buffer[outpos] = utf8_name[inpos];
 517     }
 518     buffer[outpos] = '"';
 519     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 520     free(buffer);
 521 }
 522
 523 /*
 524  * Handle visibility notifications: when none of the bars are visible, e.g.
 525  * if windows are in fullscreen on each output, suspend the child process.
 526  *
 527  */
 528 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 529     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 530     int num_visible = 0;
 531     i3_output *output;
 532
 533     SLIST_FOREACH(output, outputs, slist) {
 534         if (!output->active) {
 535             continue;
 536         }
 537         if (output->bar == event->window) {
 538             if (output->visible == visible) {
 539                 return;
 540             }
 541             output->visible = visible;
 542         }
 543         num_visible += output->visible;
 544     }
 545
 546     if (num_visible == 0) {
 547         stop_child();
 548     } else if (num_visible == visible) {
 549         /* Wake the child only when transitioning from 0 to 1 visible bar.
 550          * We cannot transition from 0 to 2 or more visible bars at once since
 551          * visibility events are delivered to each window separately */
 552         cont_child();
 553     }
 554 }
 555
 556 /*
 557  * Adjusts the size of the tray window and alignment of the tray clients by
 558  * configuring their respective x coordinates. To be called when mapping or
 559  * unmapping a tray client window.
 560  *
 561  */
 562 static void configure_trayclients(void) {
 563     trayclient *trayclient;
 564     i3_output *output;
 565     SLIST_FOREACH(output, outputs, slist) {
 566         if (!output->active)
 567             continue;
 568
 569         int clients = 0;
 570         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 571             if (!trayclient->mapped)
 572                 continue;
 573             clients++;
 574
 575             DLOG("Configuring tray window %08x to x=%d\n",
 576                  trayclient->win, output->rect.w - (clients * (font.height + logical_px(2))));
 577             uint32_t x = output->rect.w - (clients * (font.height + logical_px(2)));
 578             xcb_configure_window(xcb_connection,
 579                                  trayclient->win,
 580                                  XCB_CONFIG_WINDOW_X,
 581                                  &x);
 582         }
 583     }
 584 }
 585
 586 /*
 587  * Handles ClientMessages (messages sent from another client directly to us).
 588  *
 589  * At the moment, only the tray window will receive client messages. All
 590  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 591  *
 592  */
 593 static void handle_client_message(xcb_client_message_event_t *event) {
 594     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 595         event->format == 32) {
 596         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 597         /* event->data.data32[0] is the timestamp */
 598         uint32_t op = event->data.data32[1];
 599         uint32_t mask;
 600         uint32_t values[2];
 601         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 602             xcb_window_t client = event->data.data32[2];
 603
 604             /* Listen for PropertyNotify events to get the most recent value of
 605              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 606             mask = XCB_CW_EVENT_MASK;
 607             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 608                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 609             xcb_change_window_attributes(xcb_connection,
 610                                          client,
 611                                          mask,
 612                                          values);
 613
 614             /* Request the _XEMBED_INFO property. The XEMBED specification
 615              * (which is referred by the tray specification) says this *has* to
 616              * be set, but VLC does not set it… */
 617             bool map_it = true;
 618             int xe_version = 1;
 619             xcb_get_property_cookie_t xembedc;
 620             xcb_generic_error_t *error;
 621             xembedc = xcb_get_property(xcb_connection,
 622                                        0,
 623                                        client,
 624                                        atoms[_XEMBED_INFO],
 625                                        XCB_GET_PROPERTY_TYPE_ANY,
 626                                        0,
 627                                        2 * 32);
 628
 629             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 630                                                                        xembedc,
 631                                                                        &error);
 632             if (error != NULL) {
 633                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 634                      error->error_code);
 635                 free(error);
 636                 return;
 637             }
 638             if (xembedr != NULL && xembedr->length != 0) {
 639                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 640                 uint32_t *xembed = xcb_get_property_value(xembedr);
 641                 DLOG("xembed version = %d\n", xembed[0]);
 642                 DLOG("xembed flags = %d\n", xembed[1]);
 643                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 644                 xe_version = xembed[0];
 645                 if (xe_version > 1)
 646                     xe_version = 1;
 647                 free(xembedr);
 648             } else {
 649                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 650             }
 651
 652             DLOG("X window %08x requested docking\n", client);
 653             i3_output *walk, *output = NULL;
 654             SLIST_FOREACH(walk, outputs, slist) {
 655                 if (!walk->active)
 656                     continue;
 657                 if (config.tray_output) {
 658                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 659                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 660                         continue;
 661                 }
 662
 663                 DLOG("using output %s\n", walk->name);
 664                 output = walk;
 665                 break;
 666             }
 667             /* In case of tray_output == primary and there is no primary output
 668              * configured, we fall back to the first available output. */
 669             if (output == NULL &&
 670                 config.tray_output &&
 671                 strcasecmp("primary", config.tray_output) == 0) {
 672                 SLIST_FOREACH(walk, outputs, slist) {
 673                     if (!walk->active)
 674                         continue;
 675                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 676                     output = walk;
 677                     break;
 678                 }
 679             }
 680             if (output == NULL) {
 681                 ELOG("No output found\n");
 682                 return;
 683             }
 684             xcb_reparent_window(xcb_connection,
 685                                 client,
 686                                 output->bar,
 687                                 output->rect.w - font.height - 2,
 688                                 2);
 689             /* We reconfigure the window to use a reasonable size. The systray
 690              * specification explicitly says:
 691              *   Tray icons may be assigned any size by the system tray, and
 692              *   should do their best to cope with any size effectively
 693              */
 694             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 695             values[0] = font.height;
 696             values[1] = font.height;
 697             xcb_configure_window(xcb_connection,
 698                                  client,
 699                                  mask,
 700                                  values);
 701
 702             /* send the XEMBED_EMBEDDED_NOTIFY message */
 703             void *event = scalloc(32);
 704             xcb_client_message_event_t *ev = event;
 705             ev->response_type = XCB_CLIENT_MESSAGE;
 706             ev->window = client;
 707             ev->type = atoms[_XEMBED];
 708             ev->format = 32;
 709             ev->data.data32[0] = XCB_CURRENT_TIME;
 710             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 711             ev->data.data32[2] = output->bar;
 712             ev->data.data32[3] = xe_version;
 713             xcb_send_event(xcb_connection,
 714                            0,
 715                            client,
 716                            XCB_EVENT_MASK_NO_EVENT,
 717                            (char *)ev);
 718             free(event);
 719
 720             /* Put the client inside the save set. Upon termination (whether
 721              * killed or normal exit does not matter) of i3bar, these clients
 722              * will be correctly reparented to their most closest living
 723              * ancestor. Without this, tray icons might die when i3bar
 724              * exits/crashes. */
 725             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 726
 727             trayclient *tc = smalloc(sizeof(trayclient));
 728             tc->win = client;
 729             tc->xe_version = xe_version;
 730             tc->mapped = false;
 731             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 732
 733             if (map_it) {
 734                 DLOG("Mapping dock client\n");
 735                 xcb_map_window(xcb_connection, client);
 736             } else {
 737                 DLOG("Not mapping dock client yet\n");
 738             }
 739             /* Trigger an update to copy the statusline text to the appropriate
 740              * position */
 741             configure_trayclients();
 742             draw_bars(false);
 743         }
 744     }
 745 }
 746
 747 /*
 748  * Handles DestroyNotify events by removing the tray client from the data
 749  * structure. According to the XEmbed protocol, this is one way for a tray
 750  * client to finish the protocol. After this event is received, there is no
 751  * further interaction with the tray client.
 752  *
 753  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 754  *
 755  */
 756 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 757     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 758
 759     i3_output *walk;
 760     SLIST_FOREACH(walk, outputs, slist) {
 761         if (!walk->active)
 762             continue;
 763         DLOG("checking output %s\n", walk->name);
 764         trayclient *trayclient;
 765         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 766             if (trayclient->win != event->window)
 767                 continue;
 768
 769             DLOG("Removing tray client with window ID %08x\n", event->window);
 770             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 771
 772             /* Trigger an update, we now have more space for the statusline */
 773             configure_trayclients();
 774             draw_bars(false);
 775             return;
 776         }
 777     }
 778 }
 779
 780 /*
 781  * Handles MapNotify events. These events happen when a tray client shows its
 782  * window. We respond by realigning the tray clients.
 783  *
 784  */
 785 static void handle_map_notify(xcb_map_notify_event_t *event) {
 786     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 787
 788     i3_output *walk;
 789     SLIST_FOREACH(walk, outputs, slist) {
 790         if (!walk->active)
 791             continue;
 792         DLOG("checking output %s\n", walk->name);
 793         trayclient *trayclient;
 794         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 795             if (trayclient->win != event->window)
 796                 continue;
 797
 798             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 799             trayclient->mapped = true;
 800
 801             /* Trigger an update, we now have more space for the statusline */
 802             configure_trayclients();
 803             draw_bars(false);
 804             return;
 805         }
 806     }
 807 }
 808 /*
 809  * Handles UnmapNotify events. These events happen when a tray client hides its
 810  * window. We respond by realigning the tray clients.
 811  *
 812  */
 813 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 814     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 815
 816     i3_output *walk;
 817     SLIST_FOREACH(walk, outputs, slist) {
 818         if (!walk->active)
 819             continue;
 820         DLOG("checking output %s\n", walk->name);
 821         trayclient *trayclient;
 822         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 823             if (trayclient->win != event->window)
 824                 continue;
 825
 826             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 827             trayclient->mapped = false;
 828
 829             /* Trigger an update, we now have more space for the statusline */
 830             configure_trayclients();
 831             draw_bars(false);
 832             return;
 833         }
 834     }
 835 }
 836
 837 /*
 838  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 839  * handled, which tells us whether a dock client should be mapped or unmapped.
 840  *
 841  */
 842 static void handle_property_notify(xcb_property_notify_event_t *event) {
 843     DLOG("PropertyNotify\n");
 844     if (event->atom == atoms[_XEMBED_INFO] &&
 845         event->state == XCB_PROPERTY_NEW_VALUE) {
 846         DLOG("xembed_info updated\n");
 847         trayclient *trayclient = NULL, *walk;
 848         i3_output *o_walk;
 849         SLIST_FOREACH(o_walk, outputs, slist) {
 850             if (!o_walk->active)
 851                 continue;
 852
 853             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 854                 if (walk->win != event->window)
 855                     continue;
 856                 trayclient = walk;
 857                 break;
 858             }
 859
 860             if (trayclient)
 861                 break;
 862         }
 863         if (!trayclient) {
 864             ELOG("PropertyNotify received for unknown window %08x\n",
 865                  event->window);
 866             return;
 867         }
 868         xcb_get_property_cookie_t xembedc;
 869         xembedc = xcb_get_property_unchecked(xcb_connection,
 870                                              0,
 871                                              trayclient->win,
 872                                              atoms[_XEMBED_INFO],
 873                                              XCB_GET_PROPERTY_TYPE_ANY,
 874                                              0,
 875                                              2 * 32);
 876
 877         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 878                                                                    xembedc,
 879                                                                    NULL);
 880         if (xembedr == NULL || xembedr->length == 0) {
 881             DLOG("xembed_info unset\n");
 882             return;
 883         }
 884
 885         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 886         uint32_t *xembed = xcb_get_property_value(xembedr);
 887         DLOG("xembed version = %d\n", xembed[0]);
 888         DLOG("xembed flags = %d\n", xembed[1]);
 889         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 890         DLOG("map state now %d\n", map_it);
 891         if (trayclient->mapped && !map_it) {
 892             /* need to unmap the window */
 893             xcb_unmap_window(xcb_connection, trayclient->win);
 894         } else if (!trayclient->mapped && map_it) {
 895             /* need to map the window */
 896             xcb_map_window(xcb_connection, trayclient->win);
 897         }
 898         free(xembedr);
 899     }
 900 }
 901
 902 /*
 903  * Handle ConfigureRequests by denying them and sending the client a
 904  * ConfigureNotify with its actual size.
 905  *
 906  */
 907 static void handle_configure_request(xcb_configure_request_event_t *event) {
 908     DLOG("ConfigureRequest for window = %08x\n", event->window);
 909
 910     trayclient *trayclient;
 911     i3_output *output;
 912     SLIST_FOREACH(output, outputs, slist) {
 913         if (!output->active)
 914             continue;
 915
 916         int clients = 0;
 917         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 918             if (!trayclient->mapped)
 919                 continue;
 920             clients++;
 921
 922             if (trayclient->win != event->window)
 923                 continue;
 924
 925             xcb_rectangle_t rect;
 926             rect.x = output->rect.w - (clients * (font.height + 2));
 927             rect.y = 2;
 928             rect.width = font.height;
 929             rect.height = font.height;
 930
 931             DLOG("This is a tray window. x = %d\n", rect.x);
 932             fake_configure_notify(xcb_connection, rect, event->window, 0);
 933             return;
 934         }
 935     }
 936
 937     DLOG("WARNING: Could not find corresponding tray window.\n");
 938 }
 939
 940 /*
 941  * This function is called immediately before the main loop locks. We flush xcb
 942  * then (and only then)
 943  *
 944  */
 945 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 946     xcb_flush(xcb_connection);
 947 }
 948
 949 /*
 950  * This function is called immediately after the main loop locks, so when one
 951  * of the watchers registered an event.
 952  * We check whether an X-Event arrived and handle it.
 953  *
 954  */
 955 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 956     xcb_generic_event_t *event;
 957
 958     if (xcb_connection_has_error(xcb_connection)) {
 959         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 960         exit(1);
 961     }
 962
 963     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 964         int type = (event->response_type & ~0x80);
 965
 966         if (type == xkb_base && xkb_base > -1) {
 967             DLOG("received an xkb event\n");
 968
 969             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
 970             if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
 971                 int modstate = state->mods & config.modifier;
 972
 973 #define DLOGMOD(modmask, status)                        \
 974     do {                                                \
 975         switch (modmask) {                              \
 976             case ShiftMask:                             \
 977                 DLOG("ShiftMask got " #status "!\n");   \
 978                 break;                                  \
 979             case ControlMask:                           \
 980                 DLOG("ControlMask got " #status "!\n"); \
 981                 break;                                  \
 982             case Mod1Mask:                              \
 983                 DLOG("Mod1Mask got " #status "!\n");    \
 984                 break;                                  \
 985             case Mod2Mask:                              \
 986                 DLOG("Mod2Mask got " #status "!\n");    \
 987                 break;                                  \
 988             case Mod3Mask:                              \
 989                 DLOG("Mod3Mask got " #status "!\n");    \
 990                 break;                                  \
 991             case Mod4Mask:                              \
 992                 DLOG("Mod4Mask got " #status "!\n");    \
 993                 break;                                  \
 994             case Mod5Mask:                              \
 995                 DLOG("Mod5Mask got " #status "!\n");    \
 996                 break;                                  \
 997         }                                               \
 998     } while (0)
 999
1000                 if (modstate != mod_pressed) {
1001                     if (modstate == 0) {
1002                         DLOGMOD(config.modifier, released);
1003                         if (!activated_mode)
1004                             hide_bars();
1005                     } else {
1006                         DLOGMOD(config.modifier, pressed);
1007                         activated_mode = false;
1008                         unhide_bars();
1009                     }
1010                     mod_pressed = modstate;
1011                 }
1012 #undef DLOGMOD
1013             }
1014
1015             free(event);
1016             continue;
1017         }
1018
1019         switch (type) {
1020             case XCB_VISIBILITY_NOTIFY:
1021                 /* Visibility change: a bar is [un]obscured by other window */
1022                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1023                 break;
1024             case XCB_EXPOSE:
1025                 /* Expose-events happen, when the window needs to be redrawn */
1026                 redraw_bars();
1027                 break;
1028             case XCB_BUTTON_PRESS:
1029                 /* Button press events are mouse-buttons clicked on one of our bars */
1030                 handle_button((xcb_button_press_event_t *)event);
1031                 break;
1032             case XCB_CLIENT_MESSAGE:
1033                 /* Client messages are used for client-to-client communication, for
1034                  * example system tray widgets talk to us directly via client messages. */
1035                 handle_client_message((xcb_client_message_event_t *)event);
1036                 break;
1037             case XCB_DESTROY_NOTIFY:
1038                 /* DestroyNotify signifies the end of the XEmbed protocol */
1039                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1040                 break;
1041             case XCB_UNMAP_NOTIFY:
1042                 /* UnmapNotify is received when a tray client hides its window. */
1043                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1044                 break;
1045             case XCB_MAP_NOTIFY:
1046                 handle_map_notify((xcb_map_notify_event_t *)event);
1047                 break;
1048             case XCB_PROPERTY_NOTIFY:
1049                 /* PropertyNotify */
1050                 handle_property_notify((xcb_property_notify_event_t *)event);
1051                 break;
1052             case XCB_CONFIGURE_REQUEST:
1053                 /* ConfigureRequest, sent by a tray child */
1054                 handle_configure_request((xcb_configure_request_event_t *)event);
1055                 break;
1056         }
1057         free(event);
1058     }
1059 }
1060
1061 /*
1062  * Dummy Callback. We only need this, so that the Prepare- and Check-Watchers
1063  * are triggered
1064  *
1065  */
1066 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1067 }
1068
1069 /*
1070  * Early initialization of the connection to X11: Everything which does not
1071  * depend on 'config'.
1072  *
1073  */
1074 char *init_xcb_early() {
1075     /* FIXME: xcb_connect leaks Memory */
1076     xcb_connection = xcb_connect(NULL, &screen);
1077     if (xcb_connection_has_error(xcb_connection)) {
1078         ELOG("Cannot open display\n");
1079         exit(EXIT_FAILURE);
1080     }
1081     conn = xcb_connection;
1082     DLOG("Connected to xcb\n");
1083
1084 /* We have to request the atoms we need */
1085 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1086 #include "xcb_atoms.def"
1087
1088     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1089     xcb_root = root_screen->root;
1090
1091     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
1092      * this way, we can choose to crop it */
1093     uint32_t mask = XCB_GC_FOREGROUND;
1094     uint32_t vals[] = {colors.bar_bg, colors.bar_bg};
1095
1096     statusline_clear = xcb_generate_id(xcb_connection);
1097     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1098                                                                statusline_clear,
1099                                                                xcb_root,
1100                                                                mask,
1101                                                                vals);
1102
1103     statusline_ctx = xcb_generate_id(xcb_connection);
1104     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1105                                                             statusline_ctx,
1106                                                             xcb_root,
1107                                                             0,
1108                                                             NULL);
1109
1110     statusline_pm = xcb_generate_id(xcb_connection);
1111     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1112                                                                root_screen->root_depth,
1113                                                                statusline_pm,
1114                                                                xcb_root,
1115                                                                root_screen->width_in_pixels,
1116                                                                root_screen->height_in_pixels);
1117
1118     /* The various Watchers to communicate with xcb */
1119     xcb_io = smalloc(sizeof(ev_io));
1120     xcb_prep = smalloc(sizeof(ev_prepare));
1121     xcb_chk = smalloc(sizeof(ev_check));
1122
1123     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1124     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1125     ev_check_init(xcb_chk, &xcb_chk_cb);
1126
1127     ev_io_start(main_loop, xcb_io);
1128     ev_prepare_start(main_loop, xcb_prep);
1129     ev_check_start(main_loop, xcb_chk);
1130
1131     /* Now we get the atoms and save them in a nice data structure */
1132     get_atoms();
1133
1134     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1135
1136     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer") ||
1137         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline buffer clearcontext") ||
1138         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline buffer context")) {
1139         exit(EXIT_FAILURE);
1140     }
1141
1142     return path;
1143 }
1144
1145 /*
1146  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1147  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1148  * in xcb.
1149  *
1150  */
1151 void register_xkb_keyevents() {
1152     const xcb_query_extension_reply_t *extreply;
1153     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1154     if (!extreply->present) {
1155         ELOG("xkb is not present on this server\n");
1156         exit(EXIT_FAILURE);
1157     }
1158     DLOG("initializing xcb-xkb\n");
1159     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1160     xcb_xkb_select_events(conn,
1161                           XCB_XKB_ID_USE_CORE_KBD,
1162                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1163                           0,
1164                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1165                           0xff,
1166                           0xff,
1167                           NULL);
1168     xkb_base = extreply->first_event;
1169 }
1170
1171 /*
1172  * Deregister from xkb keyevents.
1173  *
1174  */
1175 void deregister_xkb_keyevents() {
1176     xcb_xkb_select_events(conn,
1177                           XCB_XKB_ID_USE_CORE_KBD,
1178                           0,
1179                           0,
1180                           0,
1181                           0xff,
1182                           0xff,
1183                           NULL);
1184 }
1185
1186 /*
1187  * Initialization which depends on 'config' being usable. Called after the
1188  * configuration has arrived.
1189  *
1190  */
1191 void init_xcb_late(char *fontname) {
1192     if (fontname == NULL)
1193         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1194
1195     /* Load the font */
1196     font = load_font(fontname, true);
1197     set_font(&font);
1198     DLOG("Calculated font height: %d\n", font.height);
1199     bar_height = font.height + 2 * logical_px(ws_voff_px);
1200
1201     xcb_flush(xcb_connection);
1202
1203     if (config.hide_on_modifier == M_HIDE)
1204         register_xkb_keyevents();
1205 }
1206
1207 /*
1208  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1209  * selection.
1210  *
1211  */
1212 static void send_tray_clientmessage(void) {
1213     uint8_t buffer[32] = {0};
1214     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1215
1216     ev->response_type = XCB_CLIENT_MESSAGE;
1217     ev->window = xcb_root;
1218     ev->type = atoms[MANAGER];
1219     ev->format = 32;
1220     ev->data.data32[0] = XCB_CURRENT_TIME;
1221     ev->data.data32[1] = tray_reply->atom;
1222     ev->data.data32[2] = selwin;
1223
1224     xcb_send_event(xcb_connection,
1225                    0,
1226                    xcb_root,
1227                    0xFFFFFF,
1228                    (char *)buffer);
1229 }
1230
1231 /*
1232  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1233  * for the X11 display we are running on, then acquiring the selection for this
1234  * atom. Afterwards, tray clients will send ClientMessages to our window.
1235  *
1236  */
1237 void init_tray(void) {
1238     DLOG("Initializing system tray functionality\n");
1239     /* request the tray manager atom for the X11 display we are running on */
1240     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1241     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1242     xcb_intern_atom_cookie_t tray_cookie;
1243     if (tray_reply == NULL)
1244         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1245
1246     /* tray support: we need a window to own the selection */
1247     selwin = xcb_generate_id(xcb_connection);
1248     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1249     uint32_t selval[] = {1};
1250     xcb_create_window(xcb_connection,
1251                       root_screen->root_depth,
1252                       selwin,
1253                       xcb_root,
1254                       -1, -1,
1255                       1, 1,
1256                       0,
1257                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1258                       root_screen->root_visual,
1259                       selmask,
1260                       selval);
1261
1262     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1263     /* set the atoms */
1264     xcb_change_property(xcb_connection,
1265                         XCB_PROP_MODE_REPLACE,
1266                         selwin,
1267                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1268                         XCB_ATOM_CARDINAL,
1269                         32,
1270                         1,
1271                         &orientation);
1272
1273     init_tray_colors();
1274
1275     if (tray_reply == NULL) {
1276         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1277             ELOG("Could not get atom %s\n", atomname);
1278             exit(EXIT_FAILURE);
1279         }
1280     }
1281
1282     xcb_set_selection_owner(xcb_connection,
1283                             selwin,
1284                             tray_reply->atom,
1285                             XCB_CURRENT_TIME);
1286
1287     /* Verify that we have the selection */
1288     xcb_get_selection_owner_cookie_t selcookie;
1289     xcb_get_selection_owner_reply_t *selreply;
1290
1291     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1292     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1293         ELOG("Could not get selection owner for %s\n", atomname);
1294         exit(EXIT_FAILURE);
1295     }
1296
1297     if (selreply->owner != selwin) {
1298         ELOG("Could not set the %s selection. "
1299              "Maybe another tray is already running?\n",
1300              atomname);
1301         /* NOTE that this error is not fatal. We just can’t provide tray
1302          * functionality */
1303         free(selreply);
1304         return;
1305     }
1306
1307     send_tray_clientmessage();
1308 }
1309
1310 /*
1311  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1312  * to make GTK+ 3 applets with Symbolic Icons visible. If the colors are unset,
1313  * they assume a light background.
1314  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1315  *
1316  */
1317 void init_tray_colors(void) {
1318     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1319     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1320
1321     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1322
1323     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1324                             {bar_fg[3], bar_fg[4], '\0'},
1325                             {bar_fg[5], bar_fg[6], '\0'}};
1326     const uint8_t r = strtol(strgroups[0], NULL, 16);
1327     const uint8_t g = strtol(strgroups[1], NULL, 16);
1328     const uint8_t b = strtol(strgroups[2], NULL, 16);
1329
1330     const uint16_t r16 = ((uint16_t)r << 8) | r;
1331     const uint16_t g16 = ((uint16_t)g << 8) | g;
1332     const uint16_t b16 = ((uint16_t)b << 8) | b;
1333
1334     const uint32_t tray_colors[12] = {
1335         r16, g16, b16, /* foreground color */
1336         r16, g16, b16, /* error color */
1337         r16, g16, b16, /* warning color */
1338         r16, g16, b16, /* success color */
1339     };
1340
1341     xcb_change_property(xcb_connection,
1342                         XCB_PROP_MODE_REPLACE,
1343                         selwin,
1344                         atoms[_NET_SYSTEM_TRAY_COLORS],
1345                         XCB_ATOM_CARDINAL,
1346                         32,
1347                         12,
1348                         tray_colors);
1349 }
1350
1351 /*
1352  * Cleanup the xcb stuff.
1353  * Called once, before the program terminates.
1354  *
1355  */
1356 void clean_xcb(void) {
1357     i3_output *o_walk;
1358     free_workspaces();
1359     SLIST_FOREACH(o_walk, outputs, slist) {
1360         destroy_window(o_walk);
1361         FREE(o_walk->trayclients);
1362         FREE(o_walk->workspaces);
1363         FREE(o_walk->name);
1364     }
1365     FREE_SLIST(outputs, i3_output);
1366     FREE(outputs);
1367
1368     xcb_flush(xcb_connection);
1369     xcb_aux_sync(xcb_connection);
1370     xcb_disconnect(xcb_connection);
1371
1372     ev_check_stop(main_loop, xcb_chk);
1373     ev_prepare_stop(main_loop, xcb_prep);
1374     ev_io_stop(main_loop, xcb_io);
1375
1376     FREE(xcb_chk);
1377     FREE(xcb_prep);
1378     FREE(xcb_io);
1379 }
1380
1381 /*
1382  * Get the earlier requested atoms and save them in the prepared data structure
1383  *
1384  */
1385 void get_atoms(void) {
1386     xcb_intern_atom_reply_t *reply;
1387 #define ATOM_DO(name)                                                        \
1388     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1389     if (reply == NULL) {                                                     \
1390         ELOG("Could not get atom %s\n", #name);                              \
1391         exit(EXIT_FAILURE);                                                  \
1392     }                                                                        \
1393     atoms[name] = reply->atom;                                               \
1394     free(reply);
1395
1396 #include "xcb_atoms.def"
1397     DLOG("Got atoms\n");
1398 }
1399
1400 /*
1401  * Reparents all tray clients of the specified output to the root window. This
1402  * is either used when shutting down, when an output appears (xrandr --output
1403  * VGA1 --off) or when the primary output changes.
1404  *
1405  * Applications using the tray will start the protocol from the beginning again
1406  * afterwards.
1407  *
1408  */
1409 void kick_tray_clients(i3_output *output) {
1410     if (TAILQ_EMPTY(output->trayclients))
1411         return;
1412
1413     trayclient *trayclient;
1414     while (!TAILQ_EMPTY(output->trayclients)) {
1415         trayclient = TAILQ_FIRST(output->trayclients);
1416         /* Unmap, then reparent (to root) the tray client windows */
1417         xcb_unmap_window(xcb_connection, trayclient->win);
1418         xcb_reparent_window(xcb_connection,
1419                             trayclient->win,
1420                             xcb_root,
1421                             0,
1422                             0);
1423
1424         /* We remove the trayclient right here. We might receive an UnmapNotify
1425          * event afterwards, but better safe than sorry. */
1426         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1427     }
1428
1429     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1430      * We cannot actually destroy the window because then Qt will not restore
1431      * its event mask on the new window. */
1432     uint8_t buffer[32] = {0};
1433     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1434
1435     event->response_type = XCB_DESTROY_NOTIFY;
1436     event->event = selwin;
1437     event->window = selwin;
1438
1439     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1440
1441     send_tray_clientmessage();
1442 }
1443
1444 /*
1445  * Destroy the bar of the specified output
1446  *
1447  */
1448 void destroy_window(i3_output *output) {
1449     if (output == NULL) {
1450         return;
1451     }
1452     if (output->bar == XCB_NONE) {
1453         return;
1454     }
1455
1456     kick_tray_clients(output);
1457     xcb_destroy_window(xcb_connection, output->bar);
1458     output->bar = XCB_NONE;
1459 }
1460
1461 /*
1462  * Reallocate the statusline buffer
1463  *
1464  */
1465 void realloc_sl_buffer(void) {
1466     DLOG("Re-allocating statusline buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1467          statusline_width, root_screen->width_in_pixels);
1468     xcb_free_pixmap(xcb_connection, statusline_pm);
1469     statusline_pm = xcb_generate_id(xcb_connection);
1470     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1471                                                                root_screen->root_depth,
1472                                                                statusline_pm,
1473                                                                xcb_root,
1474                                                                MAX(root_screen->width_in_pixels, statusline_width),
1475                                                                bar_height);
1476
1477     uint32_t mask = XCB_GC_FOREGROUND;
1478     uint32_t vals[2] = {colors.bar_bg, colors.bar_bg};
1479     xcb_free_gc(xcb_connection, statusline_clear);
1480     statusline_clear = xcb_generate_id(xcb_connection);
1481     xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1482                                                                statusline_clear,
1483                                                                xcb_root,
1484                                                                mask,
1485                                                                vals);
1486
1487     mask |= XCB_GC_BACKGROUND;
1488     vals[0] = colors.bar_fg;
1489     xcb_free_gc(xcb_connection, statusline_ctx);
1490     statusline_ctx = xcb_generate_id(xcb_connection);
1491     xcb_void_cookie_t sl_ctx_cookie = xcb_create_gc_checked(xcb_connection,
1492                                                             statusline_ctx,
1493                                                             xcb_root,
1494                                                             mask,
1495                                                             vals);
1496
1497     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer") ||
1498         xcb_request_failed(clear_ctx_cookie, "Could not allocate statusline buffer clearcontext") ||
1499         xcb_request_failed(sl_ctx_cookie, "Could not allocate statusline buffer context")) {
1500         exit(EXIT_FAILURE);
1501     }
1502 }
1503
1504 /*
1505  * Reconfigure all bars and create new bars for recently activated outputs
1506  *
1507  */
1508 void reconfig_windows(bool redraw_bars) {
1509     uint32_t mask;
1510     uint32_t values[5];
1511     static bool tray_configured = false;
1512
1513     i3_output *walk;
1514     SLIST_FOREACH(walk, outputs, slist) {
1515         if (!walk->active) {
1516             /* If an output is not active, we destroy its bar */
1517             /* FIXME: Maybe we rather want to unmap? */
1518             DLOG("Destroying window for output %s\n", walk->name);
1519             destroy_window(walk);
1520             continue;
1521         }
1522         if (walk->bar == XCB_NONE) {
1523             DLOG("Creating window for output %s\n", walk->name);
1524
1525             walk->bar = xcb_generate_id(xcb_connection);
1526             walk->buffer = xcb_generate_id(xcb_connection);
1527             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1528             /* Black background */
1529             values[0] = colors.bar_bg;
1530             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1531             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1532             /* We enable the following EventMask fields:
1533              * EXPOSURE, to get expose events (we have to re-draw then)
1534              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1535              *                        child windows use ConfigureWindow
1536              * BUTTON_PRESS, to handle clicks on the workspace buttons
1537              * */
1538             values[2] = XCB_EVENT_MASK_EXPOSURE |
1539                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1540                         XCB_EVENT_MASK_BUTTON_PRESS;
1541             if (config.hide_on_modifier == M_DOCK) {
1542                 /* If the bar is normally visible, catch visibility change events to suspend
1543                  * the status process when the bar is obscured by full-screened windows.  */
1544                 values[2] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1545                 walk->visible = true;
1546             }
1547             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1548                                                                      root_screen->root_depth,
1549                                                                      walk->bar,
1550                                                                      xcb_root,
1551                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1552                                                                      walk->rect.w, bar_height,
1553                                                                      0,
1554                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1555                                                                      root_screen->root_visual,
1556                                                                      mask,
1557                                                                      values);
1558
1559             /* The double-buffer we use to render stuff off-screen */
1560             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1561                                                                     root_screen->root_depth,
1562                                                                     walk->buffer,
1563                                                                     walk->bar,
1564                                                                     walk->rect.w,
1565                                                                     bar_height);
1566
1567             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1568             xcb_void_cookie_t class_cookie;
1569             class_cookie = xcb_change_property(xcb_connection,
1570                                                XCB_PROP_MODE_REPLACE,
1571                                                walk->bar,
1572                                                XCB_ATOM_WM_CLASS,
1573                                                XCB_ATOM_STRING,
1574                                                8,
1575                                                (strlen("i3bar") + 1) * 2,
1576                                                "i3bar\0i3bar\0");
1577
1578             char *name;
1579             if (asprintf(&name, "i3bar for output %s", walk->name) == -1)
1580                 err(EXIT_FAILURE, "asprintf()");
1581             xcb_void_cookie_t name_cookie;
1582             name_cookie = xcb_change_property(xcb_connection,
1583                                               XCB_PROP_MODE_REPLACE,
1584                                               walk->bar,
1585                                               XCB_ATOM_WM_NAME,
1586                                               XCB_ATOM_STRING,
1587                                               8,
1588                                               strlen(name),
1589                                               name);
1590             free(name);
1591
1592             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1593              * this one */
1594             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1595                                                                 XCB_PROP_MODE_REPLACE,
1596                                                                 walk->bar,
1597                                                                 atoms[_NET_WM_WINDOW_TYPE],
1598                                                                 XCB_ATOM_ATOM,
1599                                                                 32,
1600                                                                 1,
1601                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1602
1603             /* We need to tell i3, where to reserve space for i3bar */
1604             /* left, right, top, bottom, left_start_y, left_end_y,
1605              * right_start_y, right_end_y, top_start_x, top_end_x, bottom_start_x,
1606              * bottom_end_x */
1607             /* A local struct to save the strut_partial property */
1608             struct {
1609                 uint32_t left;
1610                 uint32_t right;
1611                 uint32_t top;
1612                 uint32_t bottom;
1613                 uint32_t left_start_y;
1614                 uint32_t left_end_y;
1615                 uint32_t right_start_y;
1616                 uint32_t right_end_y;
1617                 uint32_t top_start_x;
1618                 uint32_t top_end_x;
1619                 uint32_t bottom_start_x;
1620                 uint32_t bottom_end_x;
1621             } __attribute__((__packed__)) strut_partial;
1622             memset(&strut_partial, 0, sizeof(strut_partial));
1623
1624             switch (config.position) {
1625                 case POS_NONE:
1626                     break;
1627                 case POS_TOP:
1628                     strut_partial.top = bar_height;
1629                     strut_partial.top_start_x = walk->rect.x;
1630                     strut_partial.top_end_x = walk->rect.x + walk->rect.w;
1631                     break;
1632                 case POS_BOT:
1633                     strut_partial.bottom = bar_height;
1634                     strut_partial.bottom_start_x = walk->rect.x;
1635                     strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
1636                     break;
1637             }
1638             xcb_void_cookie_t strut_cookie = xcb_change_property(xcb_connection,
1639                                                                  XCB_PROP_MODE_REPLACE,
1640                                                                  walk->bar,
1641                                                                  atoms[_NET_WM_STRUT_PARTIAL],
1642                                                                  XCB_ATOM_CARDINAL,
1643                                                                  32,
1644                                                                  12,
1645                                                                  &strut_partial);
1646
1647             /* We also want a graphics context for the bars (it defines the properties
1648              * with which we draw to them) */
1649             walk->bargc = xcb_generate_id(xcb_connection);
1650             xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
1651                                                                 walk->bargc,
1652                                                                 walk->bar,
1653                                                                 0,
1654                                                                 NULL);
1655
1656             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1657             xcb_void_cookie_t map_cookie;
1658             if (config.hide_on_modifier == M_DOCK) {
1659                 map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1660             }
1661
1662             if (xcb_request_failed(win_cookie, "Could not create window") ||
1663                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1664                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1665                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1666                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1667                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1668                 xcb_request_failed(gc_cookie, "Could not create graphical context") ||
1669                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1670                 exit(EXIT_FAILURE);
1671             }
1672
1673             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1674             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1675                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1676                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1677                  * VGA-1 but output == [HDMI-1]).
1678                  */
1679                 i3_output *output;
1680                 SLIST_FOREACH(output, outputs, slist) {
1681                     if (strcasecmp(output->name, tray_output) == 0 ||
1682                         (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1683                         init_tray();
1684                         break;
1685                     }
1686                 }
1687                 tray_configured = true;
1688             }
1689         } else {
1690             /* We already have a bar, so we just reconfigure it */
1691             mask = XCB_CONFIG_WINDOW_X |
1692                    XCB_CONFIG_WINDOW_Y |
1693                    XCB_CONFIG_WINDOW_WIDTH |
1694                    XCB_CONFIG_WINDOW_HEIGHT |
1695                    XCB_CONFIG_WINDOW_STACK_MODE;
1696             values[0] = walk->rect.x;
1697             if (config.position == POS_TOP)
1698                 values[1] = walk->rect.y;
1699             else
1700                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1701             values[2] = walk->rect.w;
1702             values[3] = bar_height;
1703             values[4] = XCB_STACK_MODE_ABOVE;
1704
1705             DLOG("Destroying buffer for output %s\n", walk->name);
1706             xcb_free_pixmap(xcb_connection, walk->buffer);
1707
1708             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1709             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1710                                                                         walk->bar,
1711                                                                         mask,
1712                                                                         values);
1713
1714             mask = XCB_CW_OVERRIDE_REDIRECT;
1715             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1716             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1717             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1718                                                                         walk->bar,
1719                                                                         mask,
1720                                                                         values);
1721
1722             DLOG("Recreating buffer for output %s\n", walk->name);
1723             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1724                                                                     root_screen->root_depth,
1725                                                                     walk->buffer,
1726                                                                     walk->bar,
1727                                                                     walk->rect.w,
1728                                                                     bar_height);
1729
1730             xcb_void_cookie_t map_cookie, umap_cookie;
1731             if (redraw_bars) {
1732                 /* Unmap the window, and draw it again when in dock mode */
1733                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar);
1734                 if (config.hide_on_modifier == M_DOCK) {
1735                     cont_child();
1736                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
1737                 } else {
1738                     stop_child();
1739                 }
1740
1741                 if (config.hide_on_modifier == M_HIDE) {
1742                     /* Switching to hide mode, register for keyevents */
1743                     register_xkb_keyevents();
1744                 } else {
1745                     /* Switching to dock/invisible mode, deregister from keyevents */
1746                     deregister_xkb_keyevents();
1747                 }
1748             }
1749
1750             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1751                 xcb_request_failed(chg_cookie, "Could not change window") ||
1752                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1753                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1754                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1755                 exit(EXIT_FAILURE);
1756             }
1757         }
1758     }
1759 }
1760
1761 /*
1762  * Render the bars, with buttons and statusline
1763  *
1764  */
1765 void draw_bars(bool unhide) {
1766     DLOG("Drawing bars...\n");
1767     int workspace_width = 0;
1768
1769     refresh_statusline(false);
1770
1771     i3_output *outputs_walk;
1772     SLIST_FOREACH(outputs_walk, outputs, slist) {
1773         if (!outputs_walk->active) {
1774             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1775             continue;
1776         }
1777         if (outputs_walk->bar == XCB_NONE) {
1778             /* Oh shit, an active output without an own bar. Create it now! */
1779             reconfig_windows(false);
1780         }
1781         /* First things first: clear the backbuffer */
1782         uint32_t color = colors.bar_bg;
1783         xcb_change_gc(xcb_connection,
1784                       outputs_walk->bargc,
1785                       XCB_GC_FOREGROUND,
1786                       &color);
1787         xcb_rectangle_t rect = {0, 0, outputs_walk->rect.w, bar_height};
1788         xcb_poly_fill_rectangle(xcb_connection,
1789                                 outputs_walk->buffer,
1790                                 outputs_walk->bargc,
1791                                 1,
1792                                 &rect);
1793
1794         if (!config.disable_ws) {
1795             i3_ws *ws_walk;
1796             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1797                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1798                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1799                 uint32_t fg_color = colors.inactive_ws_fg;
1800                 uint32_t bg_color = colors.inactive_ws_bg;
1801                 uint32_t border_color = colors.inactive_ws_border;
1802                 if (ws_walk->visible) {
1803                     if (!ws_walk->focused) {
1804                         fg_color = colors.active_ws_fg;
1805                         bg_color = colors.active_ws_bg;
1806                         border_color = colors.active_ws_border;
1807                     } else {
1808                         fg_color = colors.focus_ws_fg;
1809                         bg_color = colors.focus_ws_bg;
1810                         border_color = colors.focus_ws_border;
1811                     }
1812                 }
1813                 if (ws_walk->urgent) {
1814                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1815                     fg_color = colors.urgent_ws_fg;
1816                     bg_color = colors.urgent_ws_bg;
1817                     border_color = colors.urgent_ws_border;
1818                     unhide = true;
1819                 }
1820                 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1821                 uint32_t vals_border[] = {border_color, border_color};
1822                 xcb_change_gc(xcb_connection,
1823                               outputs_walk->bargc,
1824                               mask,
1825                               vals_border);
1826                 xcb_rectangle_t rect_border = {workspace_width,
1827                                                logical_px(1),
1828                                                ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1829                                                font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1)};
1830                 xcb_poly_fill_rectangle(xcb_connection,
1831                                         outputs_walk->buffer,
1832                                         outputs_walk->bargc,
1833                                         1,
1834                                         &rect_border);
1835                 uint32_t vals[] = {bg_color, bg_color};
1836                 xcb_change_gc(xcb_connection,
1837                               outputs_walk->bargc,
1838                               mask,
1839                               vals);
1840                 xcb_rectangle_t rect = {workspace_width + logical_px(1),
1841                                         2 * logical_px(1),
1842                                         ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1843                                         font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1)};
1844                 xcb_poly_fill_rectangle(xcb_connection,
1845                                         outputs_walk->buffer,
1846                                         outputs_walk->bargc,
1847                                         1,
1848                                         &rect);
1849                 set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1850                 draw_text(ws_walk->name, outputs_walk->buffer, outputs_walk->bargc,
1851                           workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1852                           logical_px(ws_voff_px),
1853                           ws_walk->name_width);
1854
1855                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1856                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1857                     workspace_width += logical_px(ws_spacing_px);
1858             }
1859         }
1860
1861         if (binding.name && !config.disable_binding_mode_indicator) {
1862             workspace_width += logical_px(ws_spacing_px);
1863
1864             uint32_t fg_color = colors.urgent_ws_fg;
1865             uint32_t bg_color = colors.urgent_ws_bg;
1866             uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
1867
1868             uint32_t vals_border[] = {colors.urgent_ws_border, colors.urgent_ws_border};
1869             xcb_change_gc(xcb_connection,
1870                           outputs_walk->bargc,
1871                           mask,
1872                           vals_border);
1873             xcb_rectangle_t rect_border = {workspace_width,
1874                                            logical_px(1),
1875                                            binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1876                                            font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1)};
1877             xcb_poly_fill_rectangle(xcb_connection,
1878                                     outputs_walk->buffer,
1879                                     outputs_walk->bargc,
1880                                     1,
1881                                     &rect_border);
1882
1883             uint32_t vals[] = {bg_color, bg_color};
1884             xcb_change_gc(xcb_connection,
1885                           outputs_walk->bargc,
1886                           mask,
1887                           vals);
1888             xcb_rectangle_t rect = {workspace_width + logical_px(1),
1889                                     2 * logical_px(1),
1890                                     binding.width + 2 * logical_px(ws_hoff_px),
1891                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1)};
1892             xcb_poly_fill_rectangle(xcb_connection,
1893                                     outputs_walk->buffer,
1894                                     outputs_walk->bargc,
1895                                     1,
1896                                     &rect);
1897
1898             set_font_colors(outputs_walk->bargc, fg_color, bg_color);
1899             draw_text(binding.name,
1900                       outputs_walk->buffer,
1901                       outputs_walk->bargc,
1902                       workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1903                       logical_px(ws_voff_px),
1904                       binding.width);
1905
1906             unhide = true;
1907             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
1908         }
1909
1910         if (!TAILQ_EMPTY(&statusline_head)) {
1911             DLOG("Printing statusline!\n");
1912
1913             int tray_width = get_tray_width(outputs_walk->trayclients);
1914             int max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
1915
1916             /* If the statusline is too long, try to use short texts. */
1917             if (statusline_width > max_statusline_width)
1918                 refresh_statusline(true);
1919
1920             /* Luckily we already prepared a seperate pixmap containing the rendered
1921              * statusline, we just have to copy the relevant parts to the relevant
1922              * position */
1923             int visible_statusline_width = MIN(statusline_width, max_statusline_width);
1924             xcb_copy_area(xcb_connection,
1925                           statusline_pm,
1926                           outputs_walk->buffer,
1927                           outputs_walk->bargc,
1928                           (int16_t)(statusline_width - visible_statusline_width), 0,
1929                           (int16_t)(outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width), 0,
1930                           (int16_t)visible_statusline_width, (int16_t)bar_height);
1931         }
1932
1933         workspace_width = 0;
1934     }
1935
1936     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1937     if (mod_pressed ||
1938         config.hidden_state == S_SHOW ||
1939         unhide) {
1940         unhide_bars();
1941     } else if (config.hide_on_modifier == M_HIDE) {
1942         hide_bars();
1943     }
1944
1945     redraw_bars();
1946 }
1947
1948 /*
1949  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1950  *
1951  */
1952 void redraw_bars(void) {
1953     i3_output *outputs_walk;
1954     SLIST_FOREACH(outputs_walk, outputs, slist) {
1955         if (!outputs_walk->active) {
1956             continue;
1957         }
1958         xcb_copy_area(xcb_connection,
1959                       outputs_walk->buffer,
1960                       outputs_walk->bar,
1961                       outputs_walk->bargc,
1962                       0, 0,
1963                       0, 0,
1964                       outputs_walk->rect.w,
1965                       outputs_walk->rect.h);
1966         xcb_flush(xcb_connection);
1967     }
1968 }
1969
1970 /*
1971  * Set the current binding mode
1972  *
1973  */
1974 void set_current_mode(struct mode *current) {
1975     I3STRING_FREE(binding.name);
1976     binding = *current;
1977     activated_mode = binding.name != NULL;
1978     return;
1979 }