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   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include "common.h"
  11
  12 #include <xcb/xcb.h>
  13 #include <xcb/xkb.h>
  14 #include <xcb/xproto.h>
  15 #include <xcb/xcb_aux.h>
  16 #include <xcb/xcb_cursor.h>
  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 #ifdef I3_ASAN_ENABLED
  34 #include <sanitizer/lsan_interface.h>
  35 #endif
  36
  37 #include "libi3.h"
  38
  39 /** This is the equivalent of XC_left_ptr. I’m not sure why xcb doesn’t have a
  40  * constant for that. */
  41 #define XCB_CURSOR_LEFT_PTR 68
  42
  43 /* We save the atoms in an easy to access array, indexed by an enum */
  44 enum {
  45 #define ATOM_DO(name) name,
  46 #include "xcb_atoms.def"
  47     NUM_ATOMS
  48 };
  49
  50 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  51 xcb_atom_t atoms[NUM_ATOMS];
  52
  53 /* Variables, that are the same for all functions at all times */
  54 xcb_connection_t *xcb_connection;
  55 int screen;
  56 xcb_screen_t *root_screen;
  57 xcb_window_t xcb_root;
  58 static xcb_cursor_t cursor;
  59
  60 /* selection window for tray support */
  61 static xcb_window_t selwin = XCB_NONE;
  62 static xcb_intern_atom_reply_t *tray_reply = NULL;
  63
  64 /* This is needed for integration with libi3 */
  65 xcb_connection_t *conn;
  66
  67 /* The font we'll use */
  68 static i3Font font;
  69
  70 /* Icon size (based on font size) */
  71 int icon_size;
  72
  73 xcb_visualtype_t *visual_type;
  74 uint8_t depth;
  75 xcb_colormap_t colormap;
  76
  77 /* Overall height of the bar (based on font size) */
  78 int bar_height;
  79
  80 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  81 int xkb_base;
  82 bool mod_pressed = 0;
  83
  84 /* Event watchers, to interact with the user */
  85 ev_prepare *xcb_prep;
  86 ev_io *xcb_io;
  87 ev_io *xkb_io;
  88
  89 /* The name of current binding mode */
  90 static mode binding;
  91
  92 /* Indicates whether a new binding mode was recently activated */
  93 bool activated_mode = false;
  94
  95 /* The output in which the tray should be displayed. */
  96 static i3_output *output_for_tray;
  97
  98 /* The parsed colors */
  99 struct xcb_colors_t {
 100     color_t bar_fg;
 101     color_t bar_bg;
 102     color_t sep_fg;
 103     color_t focus_bar_fg;
 104     color_t focus_bar_bg;
 105     color_t focus_sep_fg;
 106     color_t active_ws_fg;
 107     color_t active_ws_bg;
 108     color_t active_ws_border;
 109     color_t inactive_ws_fg;
 110     color_t inactive_ws_bg;
 111     color_t inactive_ws_border;
 112     color_t urgent_ws_bg;
 113     color_t urgent_ws_fg;
 114     color_t urgent_ws_border;
 115     color_t focus_ws_bg;
 116     color_t focus_ws_fg;
 117     color_t focus_ws_border;
 118     color_t binding_mode_bg;
 119     color_t binding_mode_fg;
 120     color_t binding_mode_border;
 121 };
 122 struct xcb_colors_t colors;
 123
 124 /* Horizontal offset between a workspace label and button borders */
 125 static const int ws_hoff_px = 4;
 126
 127 /* Vertical offset between a workspace label and button borders */
 128 static const int ws_voff_px = 3;
 129
 130 /* Offset between two workspace buttons */
 131 static const int ws_spacing_px = 1;
 132
 133 /* Offset between the statusline and 1) workspace buttons on the left
 134  *                                   2) the tray or screen edge on the right */
 135 static const int sb_hoff_px = 4;
 136
 137 /* Additional offset between the tray and the statusline, if the tray is not empty */
 138 static const int tray_loff_px = 2;
 139
 140 /* Vertical offset between the bar and a separator */
 141 static const int sep_voff_px = 4;
 142
 143 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 144     xcb_generic_error_t *err;
 145     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 146         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 147         return err->error_code;
 148     }
 149     return 0;
 150 }
 151
 152 static uint32_t get_sep_offset(struct status_block *block) {
 153     if (!block->no_separator && block->sep_block_width > 0)
 154         return block->sep_block_width / 2 + block->sep_block_width % 2;
 155     return 0;
 156 }
 157
 158 static int get_tray_width(struct tc_head *trayclients) {
 159     trayclient *trayclient;
 160     int tray_width = 0;
 161     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 162         if (!trayclient->mapped)
 163             continue;
 164         tray_width += icon_size + logical_px(config.tray_padding);
 165     }
 166     if (tray_width > 0)
 167         tray_width += logical_px(tray_loff_px);
 168     return tray_width;
 169 }
 170
 171 /*
 172  * Draws a separator for the given block if necessary.
 173  *
 174  */
 175 static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
 176     color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
 177     color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 178
 179     uint32_t sep_offset = get_sep_offset(block);
 180     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 181         return;
 182
 183     uint32_t center_x = x - sep_offset;
 184     if (config.separator_symbol == NULL) {
 185         /* Draw a classic one pixel, vertical separator. */
 186         draw_util_rectangle(&output->statusline_buffer, sep_fg,
 187                             center_x,
 188                             logical_px(sep_voff_px),
 189                             logical_px(1),
 190                             bar_height - 2 * logical_px(sep_voff_px));
 191     } else {
 192         /* Draw a custom separator. */
 193         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 194         draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
 195                        separator_x, logical_px(ws_voff_px), x - separator_x);
 196     }
 197 }
 198
 199 static uint32_t predict_statusline_length(bool use_short_text) {
 200     uint32_t width = 0;
 201     struct status_block *block;
 202
 203     TAILQ_FOREACH(block, &statusline_head, blocks) {
 204         i3String *text = block->full_text;
 205         struct status_block_render_desc *render = &block->full_render;
 206         if (use_short_text && block->short_text != NULL) {
 207             text = block->short_text;
 208             render = &block->short_render;
 209         }
 210
 211         if (i3string_get_num_bytes(text) == 0)
 212             continue;
 213
 214         render->width = predict_text_width(text);
 215         if (block->border)
 216             render->width += logical_px(2);
 217
 218         /* Compute offset and append for text aligment in min_width. */
 219         if (block->min_width <= render->width) {
 220             render->x_offset = 0;
 221             render->x_append = 0;
 222         } else {
 223             uint32_t padding_width = block->min_width - render->width;
 224             switch (block->align) {
 225                 case ALIGN_LEFT:
 226                     render->x_append = padding_width;
 227                     break;
 228                 case ALIGN_RIGHT:
 229                     render->x_offset = padding_width;
 230                     break;
 231                 case ALIGN_CENTER:
 232                     render->x_offset = padding_width / 2;
 233                     render->x_append = padding_width / 2 + padding_width % 2;
 234                     break;
 235             }
 236         }
 237
 238         width += render->width + render->x_offset + render->x_append;
 239
 240         /* If this is not the last block, add some pixels for a separator. */
 241         if (TAILQ_NEXT(block, blocks) != NULL)
 242             width += block->sep_block_width;
 243     }
 244
 245     return width;
 246 }
 247
 248 /*
 249  * Redraws the statusline to the output's statusline_buffer
 250  */
 251 static void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
 252     struct status_block *block;
 253
 254     color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 255     draw_util_clear_surface(&output->statusline_buffer, bar_color);
 256
 257     /* Use unsigned integer wraparound to clip off the left side.
 258      * For example, if clip_left is 75, then x will start at the very large
 259      * number INT_MAX-75, which is way outside the surface dimensions. Drawing
 260      * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
 261      * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
 262      * actually rendering content to the surface. */
 263     uint32_t x = 0 - clip_left;
 264
 265     /* Draw the text of each block */
 266     TAILQ_FOREACH(block, &statusline_head, blocks) {
 267         i3String *text = block->full_text;
 268         struct status_block_render_desc *render = &block->full_render;
 269         if (use_short_text && block->short_text != NULL) {
 270             text = block->short_text;
 271             render = &block->short_render;
 272         }
 273
 274         if (i3string_get_num_bytes(text) == 0)
 275             continue;
 276
 277         color_t fg_color;
 278         if (block->urgent) {
 279             fg_color = colors.urgent_ws_fg;
 280         } else if (block->color) {
 281             fg_color = draw_util_hex_to_color(block->color);
 282         } else if (use_focus_colors) {
 283             fg_color = colors.focus_bar_fg;
 284         } else {
 285             fg_color = colors.bar_fg;
 286         }
 287
 288         color_t bg_color = bar_color;
 289
 290         int border_width = (block->border) ? logical_px(1) : 0;
 291         int full_render_width = render->width + render->x_offset + render->x_append;
 292         if (block->border || block->background || block->urgent) {
 293             /* Let's determine the colors first. */
 294             color_t border_color = bar_color;
 295             if (block->urgent) {
 296                 border_color = colors.urgent_ws_border;
 297                 bg_color = colors.urgent_ws_bg;
 298             } else {
 299                 if (block->border)
 300                     border_color = draw_util_hex_to_color(block->border);
 301                 if (block->background)
 302                     bg_color = draw_util_hex_to_color(block->background);
 303             }
 304
 305             /* Draw the border. */
 306             draw_util_rectangle(&output->statusline_buffer, border_color,
 307                                 x, logical_px(1),
 308                                 full_render_width,
 309                                 bar_height - logical_px(2));
 310
 311             /* Draw the background. */
 312             draw_util_rectangle(&output->statusline_buffer, bg_color,
 313                                 x + border_width,
 314                                 logical_px(1) + border_width,
 315                                 full_render_width - 2 * border_width,
 316                                 bar_height - 2 * border_width - logical_px(2));
 317         }
 318
 319         draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
 320                        x + render->x_offset + border_width, logical_px(ws_voff_px),
 321                        render->width - 2 * border_width);
 322         x += full_render_width;
 323
 324         /* If this is not the last block, draw a separator. */
 325         if (TAILQ_NEXT(block, blocks) != NULL) {
 326             x += block->sep_block_width;
 327             draw_separator(output, x, block, use_focus_colors);
 328         }
 329     }
 330 }
 331
 332 /*
 333  * Hides all bars (unmaps them)
 334  *
 335  */
 336 static void hide_bars(void) {
 337     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 338         return;
 339     }
 340
 341     i3_output *walk;
 342     SLIST_FOREACH(walk, outputs, slist) {
 343         if (!walk->active) {
 344             continue;
 345         }
 346         xcb_unmap_window(xcb_connection, walk->bar.id);
 347     }
 348     stop_child();
 349 }
 350
 351 /*
 352  * Unhides all bars (maps them)
 353  *
 354  */
 355 static void unhide_bars(void) {
 356     if (config.hide_on_modifier != M_HIDE) {
 357         return;
 358     }
 359
 360     i3_output *walk;
 361     xcb_void_cookie_t cookie;
 362     uint32_t mask;
 363     uint32_t values[5];
 364
 365     cont_child();
 366
 367     SLIST_FOREACH(walk, outputs, slist) {
 368         if (walk->bar.id == XCB_NONE) {
 369             continue;
 370         }
 371         mask = XCB_CONFIG_WINDOW_X |
 372                XCB_CONFIG_WINDOW_Y |
 373                XCB_CONFIG_WINDOW_WIDTH |
 374                XCB_CONFIG_WINDOW_HEIGHT |
 375                XCB_CONFIG_WINDOW_STACK_MODE;
 376         values[0] = walk->rect.x;
 377         if (config.position == POS_TOP)
 378             values[1] = walk->rect.y;
 379         else
 380             values[1] = walk->rect.y + walk->rect.h - bar_height;
 381         values[2] = walk->rect.w;
 382         values[3] = bar_height;
 383         values[4] = XCB_STACK_MODE_ABOVE;
 384         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 385         cookie = xcb_configure_window_checked(xcb_connection,
 386                                               walk->bar.id,
 387                                               mask,
 388                                               values);
 389
 390         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 391             exit(EXIT_FAILURE);
 392         }
 393         xcb_map_window(xcb_connection, walk->bar.id);
 394     }
 395 }
 396
 397 /*
 398  * Parse the colors into a format that we can use
 399  *
 400  */
 401 void init_colors(const struct xcb_color_strings_t *new_colors) {
 402 #define PARSE_COLOR(name, def)                                                           \
 403     do {                                                                                 \
 404         colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
 405     } while (0)
 406     PARSE_COLOR(bar_fg, "#FFFFFF");
 407     PARSE_COLOR(bar_bg, "#000000");
 408     PARSE_COLOR(sep_fg, "#666666");
 409     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 410     PARSE_COLOR(active_ws_bg, "#333333");
 411     PARSE_COLOR(active_ws_border, "#333333");
 412     PARSE_COLOR(inactive_ws_fg, "#888888");
 413     PARSE_COLOR(inactive_ws_bg, "#222222");
 414     PARSE_COLOR(inactive_ws_border, "#333333");
 415     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 416     PARSE_COLOR(urgent_ws_bg, "#900000");
 417     PARSE_COLOR(urgent_ws_border, "#2f343a");
 418     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 419     PARSE_COLOR(focus_ws_bg, "#285577");
 420     PARSE_COLOR(focus_ws_border, "#4c7899");
 421 #undef PARSE_COLOR
 422
 423 #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
 424     do {                                                                                             \
 425         colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
 426     } while (0)
 427
 428     /* For the binding mode indicator colors, we don't hardcode a default.
 429      * Instead, we fall back to urgent_ws_* colors. */
 430     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 431     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 432     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 433
 434     /* Similarly, for unspecified focused bar colors, we fall back to the
 435      * regular bar colors. */
 436     PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
 437     PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
 438     PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
 439 #undef PARSE_COLOR_FALLBACK
 440
 441     init_tray_colors();
 442     xcb_flush(xcb_connection);
 443 }
 444
 445 static bool execute_custom_command(xcb_keycode_t input_code, bool event_is_release) {
 446     binding_t *binding;
 447     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 448         if ((binding->input_code != input_code) || (binding->release != event_is_release))
 449             continue;
 450
 451         i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, binding->command);
 452         return true;
 453     }
 454     return false;
 455 }
 456
 457 /*
 458  * Handle a button press event (i.e. a mouse click on one of our bars).
 459  * We determine, whether the click occurred on a workspace button or if the scroll-
 460  * wheel was used and change the workspace appropriately
 461  *
 462  */
 463 static void handle_button(xcb_button_press_event_t *event) {
 464     /* Determine, which bar was clicked */
 465     i3_output *walk;
 466     xcb_window_t bar = event->event;
 467     SLIST_FOREACH(walk, outputs, slist) {
 468         if (walk->bar.id == bar) {
 469             break;
 470         }
 471     }
 472
 473     if (walk == NULL) {
 474         DLOG("Unknown bar clicked!\n");
 475         return;
 476     }
 477
 478     DLOG("Got button %d\n", event->detail);
 479
 480     /* During button release events, only check for custom commands. */
 481     const bool event_is_release = (event->response_type & ~0x80) == XCB_BUTTON_RELEASE;
 482     if (event_is_release) {
 483         execute_custom_command(event->detail, event_is_release);
 484         return;
 485     }
 486
 487     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 488     int workspace_width = 0;
 489     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 490
 491     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 492         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 493         if (x >= workspace_width && x <= workspace_width + w)
 494             clicked_ws = ws_walk;
 495         if (ws_walk->visible)
 496             cur_ws = ws_walk;
 497         workspace_width += w;
 498         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 499             workspace_width += logical_px(ws_spacing_px);
 500     }
 501
 502     if (x > workspace_width && child_want_click_events()) {
 503         /* If the child asked for click events,
 504          * check if a status block has been clicked. */
 505         int tray_width = get_tray_width(walk->trayclients);
 506         int last_block_x = 0;
 507         int offset = walk->rect.w - walk->statusline_width - tray_width - logical_px((tray_width > 0) * sb_hoff_px);
 508         int32_t statusline_x = x - offset;
 509
 510         if (statusline_x >= 0 && statusline_x < walk->statusline_width) {
 511             struct status_block *block;
 512
 513             TAILQ_FOREACH(block, &statusline_head, blocks) {
 514                 i3String *text = block->full_text;
 515                 struct status_block_render_desc *render = &block->full_render;
 516                 if (walk->statusline_short_text && block->short_text != NULL) {
 517                     text = block->short_text;
 518                     render = &block->short_render;
 519                 }
 520
 521                 if (i3string_get_num_bytes(text) == 0)
 522                     continue;
 523
 524                 const uint32_t full_render_width = render->width + render->x_offset + render->x_append;
 525                 const int relative_x = statusline_x - last_block_x;
 526                 if (relative_x >= 0 && (uint32_t)relative_x <= full_render_width) {
 527                     send_block_clicked(event->detail, block->name, block->instance,
 528                                        event->root_x, event->root_y, relative_x, event->event_y, full_render_width, bar_height,
 529                                        event->state);
 530                     return;
 531                 }
 532
 533                 last_block_x += full_render_width + block->sep_block_width;
 534             }
 535         }
 536     }
 537
 538     /* If a custom command was specified for this mouse button, it overrides
 539      * the default behavior. */
 540     if (execute_custom_command(event->detail, event_is_release)) {
 541         return;
 542     }
 543
 544     if (cur_ws == NULL) {
 545         DLOG("No workspace active?\n");
 546         return;
 547     }
 548     switch (event->detail) {
 549         case XCB_BUTTON_SCROLL_UP:
 550         case XCB_BUTTON_SCROLL_LEFT:
 551             /* Mouse wheel up. We select the previous ws, if any.
 552              * If there is no more workspace, don’t even send the workspace
 553              * command, otherwise (with workspace auto_back_and_forth) we’d end
 554              * up on the wrong workspace. */
 555             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 556                 return;
 557
 558             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 559             break;
 560         case XCB_BUTTON_SCROLL_DOWN:
 561         case XCB_BUTTON_SCROLL_RIGHT:
 562             /* Mouse wheel down. We select the next ws, if any.
 563              * If there is no more workspace, don’t even send the workspace
 564              * command, otherwise (with workspace auto_back_and_forth) we’d end
 565              * up on the wrong workspace. */
 566             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 567                 return;
 568
 569             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 570             break;
 571         case 1:
 572             cur_ws = clicked_ws;
 573
 574             /* if no workspace was clicked, focus our currently visible
 575              * workspace if it is not already focused */
 576             if (cur_ws == NULL) {
 577                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 578                     if (cur_ws->visible && !cur_ws->focused)
 579                         break;
 580                 }
 581             }
 582
 583             /* if there is nothing to focus, we are done */
 584             if (cur_ws == NULL)
 585                 return;
 586
 587             break;
 588         default:
 589             return;
 590     }
 591
 592     /* To properly handle workspace names with double quotes in them, we need
 593      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 594      * first count the number of double quotes, then we allocate a large enough
 595      * buffer, then we copy character by character. */
 596     int num_quotes = 0;
 597     size_t namelen = 0;
 598     const char *utf8_name = cur_ws->canonical_name;
 599     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 600         if (*walk == '"' || *walk == '\\')
 601             num_quotes++;
 602         /* While we’re looping through the name anyway, we can save one
 603          * strlen(). */
 604         namelen++;
 605     }
 606
 607     const size_t len = namelen + strlen("workspace \"\"") + 1;
 608     char *buffer = scalloc(len + num_quotes, 1);
 609     memcpy(buffer, "workspace \"", strlen("workspace \""));
 610     size_t inpos, outpos;
 611     for (inpos = 0, outpos = strlen("workspace \"");
 612          inpos < namelen;
 613          inpos++, outpos++) {
 614         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 615             buffer[outpos] = '\\';
 616             outpos++;
 617         }
 618         buffer[outpos] = utf8_name[inpos];
 619     }
 620     buffer[outpos] = '"';
 621     i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
 622     free(buffer);
 623 }
 624
 625 /*
 626  * Handle visibility notifications: when none of the bars are visible, e.g.
 627  * if windows are in fullscreen on each output, suspend the child process.
 628  *
 629  */
 630 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 631     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 632     int num_visible = 0;
 633     i3_output *output;
 634
 635     SLIST_FOREACH(output, outputs, slist) {
 636         if (!output->active) {
 637             continue;
 638         }
 639         if (output->bar.id == event->window) {
 640             if (output->visible == visible) {
 641                 return;
 642             }
 643             output->visible = visible;
 644         }
 645         num_visible += output->visible;
 646     }
 647
 648     if (num_visible == 0) {
 649         stop_child();
 650     } else if (num_visible == visible) {
 651         /* Wake the child only when transitioning from 0 to 1 visible bar.
 652          * We cannot transition from 0 to 2 or more visible bars at once since
 653          * visibility events are delivered to each window separately */
 654         cont_child();
 655     }
 656 }
 657
 658 /*
 659  * Adjusts the size of the tray window and alignment of the tray clients by
 660  * configuring their respective x coordinates. To be called when mapping or
 661  * unmapping a tray client window.
 662  *
 663  */
 664 static void configure_trayclients(void) {
 665     trayclient *trayclient;
 666     i3_output *output;
 667     SLIST_FOREACH(output, outputs, slist) {
 668         if (!output->active)
 669             continue;
 670
 671         int clients = 0;
 672         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 673             if (!trayclient->mapped)
 674                 continue;
 675             clients++;
 676
 677             DLOG("Configuring tray window %08x to x=%d\n",
 678                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 679             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 680             xcb_configure_window(xcb_connection,
 681                                  trayclient->win,
 682                                  XCB_CONFIG_WINDOW_X,
 683                                  &x);
 684         }
 685     }
 686 }
 687
 688 /*
 689  * Handles ClientMessages (messages sent from another client directly to us).
 690  *
 691  * At the moment, only the tray window will receive client messages. All
 692  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 693  *
 694  */
 695 static void handle_client_message(xcb_client_message_event_t *event) {
 696     if (event->type == atoms[I3_SYNC]) {
 697         xcb_window_t window = event->data.data32[0];
 698         uint32_t rnd = event->data.data32[1];
 699         /* Forward the request to i3 via the IPC interface so that all pending
 700          * IPC messages are guaranteed to be handled. */
 701         char *payload = NULL;
 702         sasprintf(&payload, "{\"rnd\":%d, \"window\":%d}", rnd, window);
 703         i3_send_msg(I3_IPC_MESSAGE_TYPE_SYNC, payload);
 704         free(payload);
 705     } else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 706                event->format == 32) {
 707         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 708         /* event->data.data32[0] is the timestamp */
 709         uint32_t op = event->data.data32[1];
 710         uint32_t mask;
 711         uint32_t values[2];
 712         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 713             xcb_window_t client = event->data.data32[2];
 714
 715             mask = XCB_CW_EVENT_MASK;
 716
 717             /* Needed to get the most recent value of XEMBED_MAPPED. */
 718             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 719             /* Needed for UnmapNotify events. */
 720             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 721             /* Needed because some tray applications (e.g., VLC) use
 722              * override_redirect which causes no ConfigureRequest to be sent. */
 723             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 724
 725             xcb_change_window_attributes(xcb_connection, client, mask, values);
 726
 727             /* Request the _XEMBED_INFO property. The XEMBED specification
 728              * (which is referred by the tray specification) says this *has* to
 729              * be set, but VLC does not set it… */
 730             bool map_it = true;
 731             int xe_version = 1;
 732             xcb_get_property_cookie_t xembedc;
 733             xcb_generic_error_t *error;
 734             xembedc = xcb_get_property(xcb_connection,
 735                                        0,
 736                                        client,
 737                                        atoms[_XEMBED_INFO],
 738                                        XCB_GET_PROPERTY_TYPE_ANY,
 739                                        0,
 740                                        2 * 32);
 741
 742             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 743                                                                        xembedc,
 744                                                                        &error);
 745             if (error != NULL) {
 746                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 747                      error->error_code);
 748                 free(error);
 749                 return;
 750             }
 751             if (xembedr != NULL && xembedr->length != 0) {
 752                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 753                 uint32_t *xembed = xcb_get_property_value(xembedr);
 754                 DLOG("xembed version = %d\n", xembed[0]);
 755                 DLOG("xembed flags = %d\n", xembed[1]);
 756                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 757                 xe_version = xembed[0];
 758                 if (xe_version > 1)
 759                     xe_version = 1;
 760                 free(xembedr);
 761             } else {
 762                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 763             }
 764
 765             DLOG("X window %08x requested docking\n", client);
 766
 767             if (output_for_tray == NULL) {
 768                 ELOG("No output found for tray\n");
 769                 return;
 770             }
 771
 772             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 773                                                             client,
 774                                                             output_for_tray->bar.id,
 775                                                             output_for_tray->rect.w - icon_size - logical_px(config.tray_padding),
 776                                                             logical_px(config.tray_padding));
 777             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 778                 return;
 779
 780             /* We reconfigure the window to use a reasonable size. The systray
 781              * specification explicitly says:
 782              *   Tray icons may be assigned any size by the system tray, and
 783              *   should do their best to cope with any size effectively
 784              */
 785             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 786             values[0] = icon_size;
 787             values[1] = icon_size;
 788             xcb_configure_window(xcb_connection,
 789                                  client,
 790                                  mask,
 791                                  values);
 792
 793             /* send the XEMBED_EMBEDDED_NOTIFY message */
 794             void *event = scalloc(32, 1);
 795             xcb_client_message_event_t *ev = event;
 796             ev->response_type = XCB_CLIENT_MESSAGE;
 797             ev->window = client;
 798             ev->type = atoms[_XEMBED];
 799             ev->format = 32;
 800             ev->data.data32[0] = XCB_CURRENT_TIME;
 801             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 802             ev->data.data32[2] = output_for_tray->bar.id;
 803             ev->data.data32[3] = xe_version;
 804             xcb_send_event(xcb_connection,
 805                            0,
 806                            client,
 807                            XCB_EVENT_MASK_NO_EVENT,
 808                            (char *)ev);
 809             free(event);
 810
 811             /* Put the client inside the save set. Upon termination (whether
 812              * killed or normal exit does not matter) of i3bar, these clients
 813              * will be correctly reparented to their most closest living
 814              * ancestor. Without this, tray icons might die when i3bar
 815              * exits/crashes. */
 816             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 817
 818             trayclient *tc = smalloc(sizeof(trayclient));
 819             tc->win = client;
 820             tc->xe_version = xe_version;
 821             tc->mapped = false;
 822             TAILQ_INSERT_TAIL(output_for_tray->trayclients, tc, tailq);
 823
 824             if (map_it) {
 825                 DLOG("Mapping dock client\n");
 826                 xcb_map_window(xcb_connection, client);
 827             } else {
 828                 DLOG("Not mapping dock client yet\n");
 829             }
 830             /* Trigger an update to copy the statusline text to the appropriate
 831              * position */
 832             configure_trayclients();
 833             draw_bars(false);
 834         }
 835     }
 836 }
 837
 838 /*
 839  * Handles DestroyNotify events by removing the tray client from the data
 840  * structure. According to the XEmbed protocol, this is one way for a tray
 841  * client to finish the protocol. After this event is received, there is no
 842  * further interaction with the tray client.
 843  *
 844  * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 845  *
 846  */
 847 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 848     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 849
 850     i3_output *walk;
 851     SLIST_FOREACH(walk, outputs, slist) {
 852         if (!walk->active)
 853             continue;
 854         DLOG("checking output %s\n", walk->name);
 855         trayclient *trayclient;
 856         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 857             if (trayclient->win != event->window) {
 858                 continue;
 859             }
 860
 861             DLOG("Removing tray client with window ID %08x\n", event->window);
 862             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 863             FREE(trayclient);
 864
 865             /* Trigger an update, we now have more space for the statusline */
 866             configure_trayclients();
 867             draw_bars(false);
 868             return;
 869         }
 870     }
 871 }
 872
 873 /*
 874  * Handles MapNotify events. These events happen when a tray client shows its
 875  * window. We respond by realigning the tray clients.
 876  *
 877  */
 878 static void handle_map_notify(xcb_map_notify_event_t *event) {
 879     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 880
 881     i3_output *walk;
 882     SLIST_FOREACH(walk, outputs, slist) {
 883         if (!walk->active)
 884             continue;
 885         DLOG("checking output %s\n", walk->name);
 886         trayclient *trayclient;
 887         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 888             if (trayclient->win != event->window)
 889                 continue;
 890
 891             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 892             trayclient->mapped = true;
 893
 894             /* Trigger an update, we now have more space for the statusline */
 895             configure_trayclients();
 896             draw_bars(false);
 897             return;
 898         }
 899     }
 900 }
 901 /*
 902  * Handles UnmapNotify events. These events happen when a tray client hides its
 903  * window. We respond by realigning the tray clients.
 904  *
 905  */
 906 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 907     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 908
 909     i3_output *walk;
 910     SLIST_FOREACH(walk, outputs, slist) {
 911         if (!walk->active)
 912             continue;
 913         DLOG("checking output %s\n", walk->name);
 914         trayclient *trayclient;
 915         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 916             if (trayclient->win != event->window)
 917                 continue;
 918
 919             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 920             trayclient->mapped = false;
 921
 922             /* Trigger an update, we now have more space for the statusline */
 923             configure_trayclients();
 924             draw_bars(false);
 925             return;
 926         }
 927     }
 928 }
 929
 930 /*
 931  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 932  * handled, which tells us whether a dock client should be mapped or unmapped.
 933  *
 934  */
 935 static void handle_property_notify(xcb_property_notify_event_t *event) {
 936     DLOG("PropertyNotify\n");
 937     if (event->atom == atoms[_XEMBED_INFO] &&
 938         event->state == XCB_PROPERTY_NEW_VALUE) {
 939         DLOG("xembed_info updated\n");
 940         trayclient *trayclient = NULL, *walk;
 941         i3_output *o_walk;
 942         SLIST_FOREACH(o_walk, outputs, slist) {
 943             if (!o_walk->active)
 944                 continue;
 945
 946             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 947                 if (walk->win != event->window)
 948                     continue;
 949                 trayclient = walk;
 950                 break;
 951             }
 952
 953             if (trayclient)
 954                 break;
 955         }
 956         if (!trayclient) {
 957             ELOG("PropertyNotify received for unknown window %08x\n",
 958                  event->window);
 959             return;
 960         }
 961         xcb_get_property_cookie_t xembedc;
 962         xembedc = xcb_get_property_unchecked(xcb_connection,
 963                                              0,
 964                                              trayclient->win,
 965                                              atoms[_XEMBED_INFO],
 966                                              XCB_GET_PROPERTY_TYPE_ANY,
 967                                              0,
 968                                              2 * 32);
 969
 970         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 971                                                                    xembedc,
 972                                                                    NULL);
 973         if (xembedr == NULL || xembedr->length == 0) {
 974             DLOG("xembed_info unset\n");
 975             return;
 976         }
 977
 978         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 979         uint32_t *xembed = xcb_get_property_value(xembedr);
 980         DLOG("xembed version = %d\n", xembed[0]);
 981         DLOG("xembed flags = %d\n", xembed[1]);
 982         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 983         DLOG("map state now %d\n", map_it);
 984         if (trayclient->mapped && !map_it) {
 985             /* need to unmap the window */
 986             xcb_unmap_window(xcb_connection, trayclient->win);
 987         } else if (!trayclient->mapped && map_it) {
 988             /* need to map the window */
 989             xcb_map_window(xcb_connection, trayclient->win);
 990         }
 991         free(xembedr);
 992     }
 993 }
 994
 995 /*
 996  * If a tray client attempts to change its size we deny the request and respond
 997  * by telling it its actual size.
 998  *
 999  */
1000 static void handle_configuration_change(xcb_window_t window) {
1001     trayclient *trayclient;
1002     i3_output *output;
1003     SLIST_FOREACH(output, outputs, slist) {
1004         if (!output->active)
1005             continue;
1006
1007         int clients = 0;
1008         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1009             if (!trayclient->mapped)
1010                 continue;
1011             clients++;
1012
1013             if (trayclient->win != window)
1014                 continue;
1015
1016             xcb_rectangle_t rect;
1017             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1018             rect.y = logical_px(config.tray_padding);
1019             rect.width = icon_size;
1020             rect.height = icon_size;
1021
1022             DLOG("This is a tray window. x = %d\n", rect.x);
1023             fake_configure_notify(xcb_connection, rect, window, 0);
1024             return;
1025         }
1026     }
1027
1028     DLOG("WARNING: Could not find corresponding tray window.\n");
1029 }
1030
1031 static void handle_configure_request(xcb_configure_request_event_t *event) {
1032     DLOG("ConfigureRequest for window = %08x\n", event->window);
1033     handle_configuration_change(event->window);
1034 }
1035
1036 static void handle_resize_request(xcb_resize_request_event_t *event) {
1037     DLOG("ResizeRequest for window = %08x\n", event->window);
1038     handle_configuration_change(event->window);
1039 }
1040
1041 /*
1042  * This function is called immediately before the main loop locks. We check for
1043  * events from X11, handle them, then flush our outgoing queue.
1044  *
1045  */
1046 static void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1047     xcb_generic_event_t *event;
1048
1049     if (xcb_connection_has_error(xcb_connection)) {
1050         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1051 #ifdef I3_ASAN_ENABLED
1052         __lsan_do_leak_check();
1053 #endif
1054         exit(1);
1055     }
1056
1057     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1058         if (event->response_type == 0) {
1059             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1060             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1061             free(event);
1062             continue;
1063         }
1064
1065         int type = (event->response_type & ~0x80);
1066
1067         if (type == xkb_base && xkb_base > -1) {
1068             DLOG("received an xkb event\n");
1069
1070             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1071             const uint32_t mod = (config.modifier & 0xFFFF);
1072             const bool new_mod_pressed = (mod != 0 && (state->mods & mod) == mod);
1073             if (new_mod_pressed != mod_pressed) {
1074                 mod_pressed = new_mod_pressed;
1075                 if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1076                     if (mod_pressed) {
1077                         activated_mode = false;
1078                         unhide_bars();
1079                     } else if (!activated_mode) {
1080                         hide_bars();
1081                     }
1082                 }
1083             }
1084
1085             free(event);
1086             continue;
1087         }
1088
1089         switch (type) {
1090             case XCB_VISIBILITY_NOTIFY:
1091                 /* Visibility change: a bar is [un]obscured by other window */
1092                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1093                 break;
1094             case XCB_EXPOSE:
1095                 if (((xcb_expose_event_t *)event)->count == 0) {
1096                     /* Expose-events happen, when the window needs to be redrawn */
1097                     redraw_bars();
1098                 }
1099
1100                 break;
1101             case XCB_BUTTON_RELEASE:
1102             case XCB_BUTTON_PRESS:
1103                 /* Button press events are mouse buttons clicked on one of our bars */
1104                 handle_button((xcb_button_press_event_t *)event);
1105                 break;
1106             case XCB_CLIENT_MESSAGE:
1107                 /* Client messages are used for client-to-client communication, for
1108                  * example system tray widgets talk to us directly via client messages. */
1109                 handle_client_message((xcb_client_message_event_t *)event);
1110                 break;
1111             case XCB_DESTROY_NOTIFY:
1112                 /* DestroyNotify signifies the end of the XEmbed protocol */
1113                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1114                 break;
1115             case XCB_UNMAP_NOTIFY:
1116                 /* UnmapNotify is received when a tray client hides its window. */
1117                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1118                 break;
1119             case XCB_MAP_NOTIFY:
1120                 handle_map_notify((xcb_map_notify_event_t *)event);
1121                 break;
1122             case XCB_PROPERTY_NOTIFY:
1123                 /* PropertyNotify */
1124                 handle_property_notify((xcb_property_notify_event_t *)event);
1125                 break;
1126             case XCB_CONFIGURE_REQUEST:
1127                 /* ConfigureRequest, sent by a tray child */
1128                 handle_configure_request((xcb_configure_request_event_t *)event);
1129                 break;
1130             case XCB_RESIZE_REQUEST:
1131                 /* ResizeRequest sent by a tray child using override_redirect. */
1132                 handle_resize_request((xcb_resize_request_event_t *)event);
1133                 break;
1134         }
1135         free(event);
1136     }
1137
1138     xcb_flush(xcb_connection);
1139 }
1140
1141 /*
1142  * Dummy callback. We only need this, so that the prepare and check watchers
1143  * are triggered
1144  *
1145  */
1146 static void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1147 }
1148
1149 /*
1150  * Early initialization of the connection to X11: Everything which does not
1151  * depend on 'config'.
1152  *
1153  */
1154 char *init_xcb_early(void) {
1155     /* FIXME: xcb_connect leaks memory */
1156     xcb_connection = xcb_connect(NULL, &screen);
1157     if (xcb_connection_has_error(xcb_connection)) {
1158         ELOG("Cannot open display\n");
1159         exit(EXIT_FAILURE);
1160     }
1161     conn = xcb_connection;
1162     DLOG("Connected to xcb\n");
1163
1164 /* We have to request the atoms we need */
1165 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1166 #include "xcb_atoms.def"
1167
1168     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1169     xcb_root = root_screen->root;
1170
1171     depth = root_screen->root_depth;
1172     colormap = root_screen->default_colormap;
1173     visual_type = get_visualtype(root_screen);
1174
1175     xcb_cursor_context_t *cursor_ctx;
1176     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1177         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1178         xcb_cursor_context_free(cursor_ctx);
1179     } else {
1180         cursor = xcb_generate_id(xcb_connection);
1181         i3Font cursor_font = load_font("cursor", false);
1182         xcb_create_glyph_cursor(
1183             xcb_connection,
1184             cursor,
1185             cursor_font.specific.xcb.id,
1186             cursor_font.specific.xcb.id,
1187             XCB_CURSOR_LEFT_PTR,
1188             XCB_CURSOR_LEFT_PTR + 1,
1189             0, 0, 0,
1190             65535, 65535, 65535);
1191     }
1192
1193     /* The various watchers to communicate with xcb */
1194     xcb_io = smalloc(sizeof(ev_io));
1195     xcb_prep = smalloc(sizeof(ev_prepare));
1196
1197     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1198     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1199
1200     ev_io_start(main_loop, xcb_io);
1201     ev_prepare_start(main_loop, xcb_prep);
1202
1203     /* Now we get the atoms and save them in a nice data structure */
1204     get_atoms();
1205
1206     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1207
1208     return path;
1209 }
1210
1211 /*
1212  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1213  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1214  * in xcb.
1215  *
1216  */
1217 static void register_xkb_keyevents(void) {
1218     const xcb_query_extension_reply_t *extreply;
1219     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1220     if (!extreply->present) {
1221         ELOG("xkb is not present on this server\n");
1222         exit(EXIT_FAILURE);
1223     }
1224     DLOG("initializing xcb-xkb\n");
1225     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1226     xcb_xkb_select_events(conn,
1227                           XCB_XKB_ID_USE_CORE_KBD,
1228                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1229                           0,
1230                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1231                           0xff,
1232                           0xff,
1233                           NULL);
1234     xkb_base = extreply->first_event;
1235 }
1236
1237 /*
1238  * Deregister from xkb keyevents.
1239  *
1240  */
1241 static void deregister_xkb_keyevents(void) {
1242     xcb_xkb_select_events(conn,
1243                           XCB_XKB_ID_USE_CORE_KBD,
1244                           0,
1245                           0,
1246                           0,
1247                           0xff,
1248                           0xff,
1249                           NULL);
1250 }
1251
1252 /*
1253  * Initialization which depends on 'config' being usable. Called after the
1254  * configuration has arrived.
1255  *
1256  */
1257 void init_xcb_late(char *fontname) {
1258     if (fontname == NULL)
1259         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1260
1261     /* Load the font */
1262     font = load_font(fontname, true);
1263     set_font(&font);
1264     DLOG("Calculated font height: %d\n", font.height);
1265     bar_height = font.height + 2 * logical_px(ws_voff_px);
1266     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1267
1268     if (config.separator_symbol)
1269         separator_symbol_width = predict_text_width(config.separator_symbol);
1270
1271     xcb_flush(xcb_connection);
1272
1273     if (config.hide_on_modifier == M_HIDE)
1274         register_xkb_keyevents();
1275 }
1276
1277 /*
1278  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1279  * selection.
1280  *
1281  */
1282 static void send_tray_clientmessage(void) {
1283     uint8_t buffer[32] = {0};
1284     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1285
1286     ev->response_type = XCB_CLIENT_MESSAGE;
1287     ev->window = xcb_root;
1288     ev->type = atoms[MANAGER];
1289     ev->format = 32;
1290     ev->data.data32[0] = XCB_CURRENT_TIME;
1291     ev->data.data32[1] = tray_reply->atom;
1292     ev->data.data32[2] = selwin;
1293
1294     xcb_send_event(xcb_connection,
1295                    0,
1296                    xcb_root,
1297                    0xFFFFFF,
1298                    (char *)buffer);
1299 }
1300
1301 /*
1302  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1303  * for the X11 display we are running on, then acquiring the selection for this
1304  * atom. Afterwards, tray clients will send ClientMessages to our window.
1305  *
1306  */
1307 static void init_tray(void) {
1308     DLOG("Initializing system tray functionality\n");
1309     /* request the tray manager atom for the X11 display we are running on */
1310     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1311     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1312     xcb_intern_atom_cookie_t tray_cookie;
1313     if (tray_reply == NULL)
1314         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1315
1316     /* tray support: we need a window to own the selection */
1317     selwin = xcb_generate_id(xcb_connection);
1318     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1319     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1320     xcb_create_window(xcb_connection,
1321                       depth,
1322                       selwin,
1323                       xcb_root,
1324                       -1, -1,
1325                       1, 1,
1326                       0,
1327                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1328                       visual_type->visual_id,
1329                       selmask,
1330                       selval);
1331
1332     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1333     /* set the atoms */
1334     xcb_change_property(xcb_connection,
1335                         XCB_PROP_MODE_REPLACE,
1336                         selwin,
1337                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1338                         XCB_ATOM_CARDINAL,
1339                         32,
1340                         1,
1341                         &orientation);
1342     xcb_change_property(xcb_connection,
1343                         XCB_PROP_MODE_REPLACE,
1344                         selwin,
1345                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1346                         XCB_ATOM_VISUALID,
1347                         32,
1348                         1,
1349                         &visual_type->visual_id);
1350
1351     init_tray_colors();
1352
1353     if (tray_reply == NULL) {
1354         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1355             ELOG("Could not get atom %s\n", atomname);
1356             exit(EXIT_FAILURE);
1357         }
1358     }
1359
1360     xcb_set_selection_owner(xcb_connection,
1361                             selwin,
1362                             tray_reply->atom,
1363                             XCB_CURRENT_TIME);
1364
1365     /* Verify that we have the selection */
1366     xcb_get_selection_owner_cookie_t selcookie;
1367     xcb_get_selection_owner_reply_t *selreply;
1368
1369     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1370     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1371         ELOG("Could not get selection owner for %s\n", atomname);
1372         exit(EXIT_FAILURE);
1373     }
1374
1375     if (selreply->owner != selwin) {
1376         ELOG("Could not set the %s selection. "
1377              "Maybe another tray is already running?\n",
1378              atomname);
1379         /* NOTE that this error is not fatal. We just can’t provide tray
1380          * functionality */
1381         free(selreply);
1382         return;
1383     }
1384
1385     free(selreply);
1386
1387     send_tray_clientmessage();
1388 }
1389
1390 /*
1391  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1392  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1393  * they assume a light background.
1394  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1395  *
1396  */
1397 void init_tray_colors(void) {
1398     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1399     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1400
1401     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1402
1403     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1404                             {bar_fg[3], bar_fg[4], '\0'},
1405                             {bar_fg[5], bar_fg[6], '\0'}};
1406     const uint8_t r = strtol(strgroups[0], NULL, 16);
1407     const uint8_t g = strtol(strgroups[1], NULL, 16);
1408     const uint8_t b = strtol(strgroups[2], NULL, 16);
1409
1410     const uint16_t r16 = ((uint16_t)r << 8) | r;
1411     const uint16_t g16 = ((uint16_t)g << 8) | g;
1412     const uint16_t b16 = ((uint16_t)b << 8) | b;
1413
1414     const uint32_t tray_colors[12] = {
1415         r16, g16, b16, /* foreground color */
1416         r16, g16, b16, /* error color */
1417         r16, g16, b16, /* warning color */
1418         r16, g16, b16, /* success color */
1419     };
1420
1421     xcb_change_property(xcb_connection,
1422                         XCB_PROP_MODE_REPLACE,
1423                         selwin,
1424                         atoms[_NET_SYSTEM_TRAY_COLORS],
1425                         XCB_ATOM_CARDINAL,
1426                         32,
1427                         12,
1428                         tray_colors);
1429 }
1430
1431 /*
1432  * Cleanup the xcb stuff.
1433  * Called once, before the program terminates.
1434  *
1435  */
1436 void clean_xcb(void) {
1437     free_outputs();
1438
1439     free_font();
1440
1441     xcb_free_cursor(xcb_connection, cursor);
1442     xcb_flush(xcb_connection);
1443     xcb_aux_sync(xcb_connection);
1444     xcb_disconnect(xcb_connection);
1445
1446     ev_prepare_stop(main_loop, xcb_prep);
1447     ev_io_stop(main_loop, xcb_io);
1448
1449     FREE(xcb_prep);
1450     FREE(xcb_io);
1451 }
1452
1453 /*
1454  * Get the earlier requested atoms and save them in the prepared data structure
1455  *
1456  */
1457 void get_atoms(void) {
1458     xcb_intern_atom_reply_t *reply;
1459 #define ATOM_DO(name)                                                        \
1460     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1461     if (reply == NULL) {                                                     \
1462         ELOG("Could not get atom %s\n", #name);                              \
1463         exit(EXIT_FAILURE);                                                  \
1464     }                                                                        \
1465     atoms[name] = reply->atom;                                               \
1466     free(reply);
1467
1468 #include "xcb_atoms.def"
1469     DLOG("Got atoms\n");
1470 }
1471
1472 /*
1473  * Reparents all tray clients of the specified output to the root window. This
1474  * is either used when shutting down, when an output appears (xrandr --output
1475  * VGA1 --off) or when the primary output changes.
1476  *
1477  * Applications using the tray will start the protocol from the beginning again
1478  * afterwards.
1479  *
1480  */
1481 void kick_tray_clients(i3_output *output) {
1482     if (TAILQ_EMPTY(output->trayclients))
1483         return;
1484
1485     trayclient *trayclient;
1486     while (!TAILQ_EMPTY(output->trayclients)) {
1487         trayclient = TAILQ_FIRST(output->trayclients);
1488         /* Unmap, then reparent (to root) the tray client windows */
1489         xcb_unmap_window(xcb_connection, trayclient->win);
1490         xcb_reparent_window(xcb_connection,
1491                             trayclient->win,
1492                             xcb_root,
1493                             0,
1494                             0);
1495
1496         /* We remove the trayclient right here. We might receive an UnmapNotify
1497          * event afterwards, but better safe than sorry. */
1498         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1499         FREE(trayclient);
1500     }
1501
1502     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1503      * We cannot actually destroy the window because then Qt will not restore
1504      * its event mask on the new window. */
1505     uint8_t buffer[32] = {0};
1506     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1507
1508     event->response_type = XCB_DESTROY_NOTIFY;
1509     event->event = selwin;
1510     event->window = selwin;
1511
1512     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1513
1514     send_tray_clientmessage();
1515 }
1516
1517 /*
1518  * Destroy the bar of the specified output
1519  *
1520  */
1521 void destroy_window(i3_output *output) {
1522     if (output == NULL) {
1523         return;
1524     }
1525     if (output->bar.id == XCB_NONE) {
1526         return;
1527     }
1528
1529     kick_tray_clients(output);
1530     xcb_destroy_window(xcb_connection, output->bar.id);
1531     output->bar.id = XCB_NONE;
1532 }
1533
1534 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1535  * by the `position` bar config directive. */
1536 static xcb_void_cookie_t config_strut_partial(i3_output *output) {
1537     /* A local struct to save the strut_partial property */
1538     struct {
1539         uint32_t left;
1540         uint32_t right;
1541         uint32_t top;
1542         uint32_t bottom;
1543         uint32_t left_start_y;
1544         uint32_t left_end_y;
1545         uint32_t right_start_y;
1546         uint32_t right_end_y;
1547         uint32_t top_start_x;
1548         uint32_t top_end_x;
1549         uint32_t bottom_start_x;
1550         uint32_t bottom_end_x;
1551     } __attribute__((__packed__)) strut_partial;
1552     memset(&strut_partial, 0, sizeof(strut_partial));
1553
1554     switch (config.position) {
1555         case POS_NONE:
1556             break;
1557         case POS_TOP:
1558             strut_partial.top = bar_height;
1559             strut_partial.top_start_x = output->rect.x;
1560             strut_partial.top_end_x = output->rect.x + output->rect.w;
1561             break;
1562         case POS_BOT:
1563             strut_partial.bottom = bar_height;
1564             strut_partial.bottom_start_x = output->rect.x;
1565             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1566             break;
1567     }
1568     return xcb_change_property(xcb_connection,
1569                                XCB_PROP_MODE_REPLACE,
1570                                output->bar.id,
1571                                atoms[_NET_WM_STRUT_PARTIAL],
1572                                XCB_ATOM_CARDINAL,
1573                                32,
1574                                12,
1575                                &strut_partial);
1576 }
1577
1578 /*
1579  * Returns the output which should hold the tray, if one exists.
1580  *
1581  * An output is returned in these scenarios:
1582  *   1. A specific output was listed in tray_outputs which is also in the list
1583  *   of outputs managed by this bar.
1584  *   2. No tray_output directive was specified. In this case, we use the first
1585  *   available output.
1586  *   3. 'tray_output primary' was specified. In this case we use the primary
1587  *   output.
1588  *
1589  * Three scenarios in which we specifically don't want to use a tray:
1590  *   1. 'tray_output none' was specified.
1591  *   2. A specific output was listed as a tray_output, but is not one of the
1592  *   outputs managed by this bar. For example, consider tray_outputs == [VGA-1],
1593  *   but outputs == [HDMI-1].
1594  *   3. 'tray_output primary' was specified and no output in the list is
1595  *   primary.
1596  */
1597 static i3_output *get_tray_output(void) {
1598     i3_output *output = NULL;
1599     if (TAILQ_EMPTY(&(config.tray_outputs))) {
1600         /* No tray_output specified, use first active output. */
1601         SLIST_FOREACH(output, outputs, slist) {
1602             if (output->active) {
1603                 return output;
1604             }
1605         }
1606         return NULL;
1607     } else if (strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0) {
1608         /* Check for "tray_output none" */
1609         return NULL;
1610     }
1611
1612     /* If one or more tray_output assignments were specified, we ensure that at
1613      * least one of them is actually an output managed by this instance. */
1614     tray_output_t *tray_output;
1615     TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1616         SLIST_FOREACH(output, outputs, slist) {
1617             if (output->active &&
1618                 (strcasecmp(output->name, tray_output->output) == 0 ||
1619                  (strcasecmp(tray_output->output, "primary") == 0 && output->primary))) {
1620                 return output;
1621             }
1622         }
1623     }
1624
1625     return NULL;
1626 }
1627
1628 /*
1629  * Reconfigure all bars and create new bars for recently activated outputs
1630  *
1631  */
1632 void reconfig_windows(bool redraw_bars) {
1633     uint32_t mask;
1634     uint32_t values[6];
1635
1636     i3_output *walk;
1637     SLIST_FOREACH(walk, outputs, slist) {
1638         if (!walk->active) {
1639             /* If an output is not active, we destroy its bar */
1640             /* FIXME: Maybe we rather want to unmap? */
1641             DLOG("Destroying window for output %s\n", walk->name);
1642             destroy_window(walk);
1643             continue;
1644         }
1645         if (walk->bar.id == XCB_NONE) {
1646             DLOG("Creating window for output %s\n", walk->name);
1647
1648             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1649             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1650             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1651             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1652
1653             values[0] = colors.bar_bg.colorpixel;
1654             values[1] = root_screen->black_pixel;
1655             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1656             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1657             /* We enable the following EventMask fields:
1658              * EXPOSURE, to get expose events (we have to re-draw then)
1659              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1660              *                        child windows use ConfigureWindow
1661              * BUTTON_PRESS, to handle clicks on the workspace buttons
1662              * */
1663             values[3] = XCB_EVENT_MASK_EXPOSURE |
1664                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1665                         XCB_EVENT_MASK_BUTTON_PRESS |
1666                         XCB_EVENT_MASK_BUTTON_RELEASE;
1667             if (config.hide_on_modifier == M_DOCK) {
1668                 /* If the bar is normally visible, catch visibility change events to suspend
1669                  * the status process when the bar is obscured by full-screened windows.  */
1670                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1671                 walk->visible = true;
1672             }
1673             values[4] = colormap;
1674             values[5] = cursor;
1675
1676             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1677                                                                      depth,
1678                                                                      bar_id,
1679                                                                      xcb_root,
1680                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1681                                                                      walk->rect.w, bar_height,
1682                                                                      0,
1683                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1684                                                                      visual_type->visual_id,
1685                                                                      mask,
1686                                                                      values);
1687
1688             /* The double-buffer we use to render stuff off-screen */
1689             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1690                                                                     depth,
1691                                                                     buffer_id,
1692                                                                     bar_id,
1693                                                                     walk->rect.w,
1694                                                                     bar_height);
1695
1696             /* The double-buffer we use to render the statusline before copying to buffer */
1697             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1698                                                                       depth,
1699                                                                       statusline_buffer_id,
1700                                                                       bar_id,
1701                                                                       walk->rect.w,
1702                                                                       bar_height);
1703
1704             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1705             xcb_void_cookie_t class_cookie;
1706             class_cookie = xcb_change_property(xcb_connection,
1707                                                XCB_PROP_MODE_REPLACE,
1708                                                bar_id,
1709                                                XCB_ATOM_WM_CLASS,
1710                                                XCB_ATOM_STRING,
1711                                                8,
1712                                                (strlen("i3bar") + 1) * 2,
1713                                                "i3bar\0i3bar\0");
1714
1715             char *name;
1716             sasprintf(&name, "i3bar for output %s", walk->name);
1717             xcb_void_cookie_t name_cookie;
1718             name_cookie = xcb_change_property(xcb_connection,
1719                                               XCB_PROP_MODE_REPLACE,
1720                                               bar_id,
1721                                               XCB_ATOM_WM_NAME,
1722                                               XCB_ATOM_STRING,
1723                                               8,
1724                                               strlen(name),
1725                                               name);
1726             free(name);
1727
1728             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1729              * this one */
1730             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1731                                                                 XCB_PROP_MODE_REPLACE,
1732                                                                 bar_id,
1733                                                                 atoms[_NET_WM_WINDOW_TYPE],
1734                                                                 XCB_ATOM_ATOM,
1735                                                                 32,
1736                                                                 1,
1737                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1738
1739             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1740             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1741             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1742
1743             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1744
1745             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1746             xcb_void_cookie_t map_cookie;
1747             if (config.hide_on_modifier == M_DOCK) {
1748                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1749             }
1750
1751             if (xcb_request_failed(win_cookie, "Could not create window") ||
1752                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1753                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1754                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1755                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1756                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1757                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1758                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1759                 exit(EXIT_FAILURE);
1760             }
1761
1762         } else {
1763             /* We already have a bar, so we just reconfigure it */
1764             mask = XCB_CONFIG_WINDOW_X |
1765                    XCB_CONFIG_WINDOW_Y |
1766                    XCB_CONFIG_WINDOW_WIDTH |
1767                    XCB_CONFIG_WINDOW_HEIGHT |
1768                    XCB_CONFIG_WINDOW_STACK_MODE;
1769             values[0] = walk->rect.x;
1770             if (config.position == POS_TOP)
1771                 values[1] = walk->rect.y;
1772             else
1773                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1774             values[2] = walk->rect.w;
1775             values[3] = bar_height;
1776             values[4] = XCB_STACK_MODE_ABOVE;
1777
1778             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1779             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1780
1781             DLOG("Destroying buffer for output %s\n", walk->name);
1782             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1783
1784             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1785             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1786
1787             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1788             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1789                                                                         walk->bar.id,
1790                                                                         mask,
1791                                                                         values);
1792
1793             mask = XCB_CW_OVERRIDE_REDIRECT;
1794             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1795             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1796             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1797                                                                         walk->bar.id,
1798                                                                         mask,
1799                                                                         values);
1800
1801             DLOG("Recreating buffer for output %s\n", walk->name);
1802             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1803                                                                     depth,
1804                                                                     walk->buffer.id,
1805                                                                     walk->bar.id,
1806                                                                     walk->rect.w,
1807                                                                     bar_height);
1808
1809             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1810             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1811                                                                       depth,
1812                                                                       walk->statusline_buffer.id,
1813                                                                       walk->bar.id,
1814                                                                       walk->rect.w,
1815                                                                       bar_height);
1816
1817             draw_util_surface_free(xcb_connection, &(walk->bar));
1818             draw_util_surface_free(xcb_connection, &(walk->buffer));
1819             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1820             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1821             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1822             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1823
1824             xcb_void_cookie_t map_cookie, umap_cookie;
1825             if (redraw_bars) {
1826                 /* Unmap the window, and draw it again when in dock mode */
1827                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1828                 if (config.hide_on_modifier == M_DOCK) {
1829                     cont_child();
1830                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1831                 } else {
1832                     stop_child();
1833                 }
1834
1835                 if (config.hide_on_modifier == M_HIDE) {
1836                     /* Switching to hide mode, register for keyevents */
1837                     register_xkb_keyevents();
1838                 } else {
1839                     /* Switching to dock/invisible mode, deregister from keyevents */
1840                     deregister_xkb_keyevents();
1841                 }
1842             }
1843
1844             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1845                 xcb_request_failed(chg_cookie, "Could not change window") ||
1846                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1847                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1848                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1849                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1850                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1851                 exit(EXIT_FAILURE);
1852             }
1853         }
1854     }
1855
1856     /* Finally, check if we want to initialize the tray or destroy the selection
1857      * window. The result of get_tray_output() is cached. */
1858     output_for_tray = get_tray_output();
1859     if (output_for_tray) {
1860         if (selwin == XCB_NONE) {
1861             init_tray();
1862         }
1863     } else if (selwin != XCB_NONE) {
1864         DLOG("Destroying tray selection window\n");
1865         xcb_destroy_window(xcb_connection, selwin);
1866         selwin = XCB_NONE;
1867     }
1868 }
1869
1870 /*
1871  * Render the bars, with buttons and statusline
1872  *
1873  */
1874 void draw_bars(bool unhide) {
1875     DLOG("Drawing bars...\n");
1876
1877     uint32_t full_statusline_width = predict_statusline_length(false);
1878     uint32_t short_statusline_width = predict_statusline_length(true);
1879
1880     i3_output *outputs_walk;
1881     SLIST_FOREACH(outputs_walk, outputs, slist) {
1882         int workspace_width = 0;
1883
1884         if (!outputs_walk->active) {
1885             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1886             continue;
1887         }
1888         if (outputs_walk->bar.id == XCB_NONE) {
1889             /* Oh shit, an active output without an own bar. Create it now! */
1890             reconfig_windows(false);
1891         }
1892
1893         bool use_focus_colors = output_has_focus(outputs_walk);
1894
1895         /* First things first: clear the backbuffer */
1896         draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1897
1898         if (!config.disable_ws) {
1899             i3_ws *ws_walk;
1900             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1901                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1902                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1903                 color_t fg_color = colors.inactive_ws_fg;
1904                 color_t bg_color = colors.inactive_ws_bg;
1905                 color_t border_color = colors.inactive_ws_border;
1906                 if (ws_walk->visible) {
1907                     if (!ws_walk->focused) {
1908                         fg_color = colors.active_ws_fg;
1909                         bg_color = colors.active_ws_bg;
1910                         border_color = colors.active_ws_border;
1911                     } else {
1912                         fg_color = colors.focus_ws_fg;
1913                         bg_color = colors.focus_ws_bg;
1914                         border_color = colors.focus_ws_border;
1915                     }
1916                 }
1917                 if (ws_walk->urgent) {
1918                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1919                     fg_color = colors.urgent_ws_fg;
1920                     bg_color = colors.urgent_ws_bg;
1921                     border_color = colors.urgent_ws_border;
1922                     unhide = true;
1923                 }
1924
1925                 /* Draw the border of the button. */
1926                 draw_util_rectangle(&(outputs_walk->buffer), border_color,
1927                                     workspace_width,
1928                                     logical_px(1),
1929                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1930                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1931
1932                 /* Draw the inside of the button. */
1933                 draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1934                                     workspace_width + logical_px(1),
1935                                     2 * logical_px(1),
1936                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1937                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1938
1939                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
1940                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1941                                logical_px(ws_voff_px),
1942                                ws_walk->name_width);
1943
1944                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1945                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1946                     workspace_width += logical_px(ws_spacing_px);
1947             }
1948         }
1949
1950         if (binding.name && !config.disable_binding_mode_indicator) {
1951             workspace_width += logical_px(ws_spacing_px);
1952
1953             color_t fg_color = colors.binding_mode_fg;
1954             color_t bg_color = colors.binding_mode_bg;
1955
1956             draw_util_rectangle(&(outputs_walk->buffer), colors.binding_mode_border,
1957                                 workspace_width,
1958                                 logical_px(1),
1959                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1960                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1961
1962             draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1963                                 workspace_width + logical_px(1),
1964                                 2 * logical_px(1),
1965                                 binding.width + 2 * logical_px(ws_hoff_px),
1966                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1967
1968             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
1969                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1970                            logical_px(ws_voff_px),
1971                            binding.width);
1972
1973             unhide = true;
1974             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
1975         }
1976
1977         if (!TAILQ_EMPTY(&statusline_head)) {
1978             DLOG("Printing statusline!\n");
1979
1980             int tray_width = get_tray_width(outputs_walk->trayclients);
1981             uint32_t hoff = logical_px(((workspace_width > 0) + (tray_width > 0)) * sb_hoff_px);
1982             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - hoff;
1983             uint32_t clip_left = 0;
1984             uint32_t statusline_width = full_statusline_width;
1985             bool use_short_text = false;
1986
1987             if (statusline_width > max_statusline_width) {
1988                 statusline_width = short_statusline_width;
1989                 use_short_text = true;
1990                 if (statusline_width > max_statusline_width) {
1991                     clip_left = statusline_width - max_statusline_width;
1992                 }
1993             }
1994
1995             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
1996             int x_dest = outputs_walk->rect.w - tray_width - logical_px((tray_width > 0) * sb_hoff_px) - visible_statusline_width;
1997
1998             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
1999             draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2000                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2001
2002             outputs_walk->statusline_width = statusline_width;
2003             outputs_walk->statusline_short_text = use_short_text;
2004         }
2005     }
2006
2007     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2008     if (mod_pressed ||
2009         config.hidden_state == S_SHOW ||
2010         unhide) {
2011         unhide_bars();
2012     } else if (config.hide_on_modifier == M_HIDE) {
2013         hide_bars();
2014     }
2015
2016     redraw_bars();
2017 }
2018
2019 /*
2020  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2021  *
2022  */
2023 void redraw_bars(void) {
2024     i3_output *outputs_walk;
2025     SLIST_FOREACH(outputs_walk, outputs, slist) {
2026         if (!outputs_walk->active) {
2027             continue;
2028         }
2029
2030         draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2031                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2032         xcb_flush(xcb_connection);
2033     }
2034 }
2035
2036 /*
2037  * Set the current binding mode
2038  *
2039  */
2040 void set_current_mode(struct mode *current) {
2041     I3STRING_FREE(binding.name);
2042     binding = *current;
2043     activated_mode = binding.name != NULL;
2044 }