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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 int relative_x = statusline_x - last_block_x;
 525                 if (relative_x >= 0 && (uint32_t)relative_x <= render->width) {
 526                     send_block_clicked(event->detail, block->name, block->instance,
 527                                        event->root_x, event->root_y, relative_x, event->event_y, render->width, bar_height);
 528                     return;
 529                 }
 530
 531                 last_block_x += render->width + render->x_append + render->x_offset + block->sep_block_width;
 532             }
 533         }
 534     }
 535
 536     /* If a custom command was specified for this mouse button, it overrides
 537      * the default behavior. */
 538     if (execute_custom_command(event->detail, event_is_release)) {
 539         return;
 540     }
 541
 542     if (cur_ws == NULL) {
 543         DLOG("No workspace active?\n");
 544         return;
 545     }
 546     switch (event->detail) {
 547         case XCB_BUTTON_SCROLL_UP:
 548         case XCB_BUTTON_SCROLL_LEFT:
 549             /* Mouse wheel up. We select the previous ws, if any.
 550              * If there is no more workspace, don’t even send the workspace
 551              * command, otherwise (with workspace auto_back_and_forth) we’d end
 552              * up on the wrong workspace. */
 553             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 554                 return;
 555
 556             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 557             break;
 558         case XCB_BUTTON_SCROLL_DOWN:
 559         case XCB_BUTTON_SCROLL_RIGHT:
 560             /* Mouse wheel down. We select the next ws, if any.
 561              * If there is no more workspace, don’t even send the workspace
 562              * command, otherwise (with workspace auto_back_and_forth) we’d end
 563              * up on the wrong workspace. */
 564             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 565                 return;
 566
 567             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 568             break;
 569         case 1:
 570             cur_ws = clicked_ws;
 571
 572             /* if no workspace was clicked, focus our currently visible
 573              * workspace if it is not already focused */
 574             if (cur_ws == NULL) {
 575                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 576                     if (cur_ws->visible && !cur_ws->focused)
 577                         break;
 578                 }
 579             }
 580
 581             /* if there is nothing to focus, we are done */
 582             if (cur_ws == NULL)
 583                 return;
 584
 585             break;
 586         default:
 587             return;
 588     }
 589
 590     /* To properly handle workspace names with double quotes in them, we need
 591      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 592      * first count the number of double quotes, then we allocate a large enough
 593      * buffer, then we copy character by character. */
 594     int num_quotes = 0;
 595     size_t namelen = 0;
 596     const char *utf8_name = cur_ws->canonical_name;
 597     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 598         if (*walk == '"' || *walk == '\\')
 599             num_quotes++;
 600         /* While we’re looping through the name anyway, we can save one
 601          * strlen(). */
 602         namelen++;
 603     }
 604
 605     const size_t len = namelen + strlen("workspace \"\"") + 1;
 606     char *buffer = scalloc(len + num_quotes, 1);
 607     memcpy(buffer, "workspace \"", strlen("workspace \""));
 608     size_t inpos, outpos;
 609     for (inpos = 0, outpos = strlen("workspace \"");
 610          inpos < namelen;
 611          inpos++, outpos++) {
 612         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 613             buffer[outpos] = '\\';
 614             outpos++;
 615         }
 616         buffer[outpos] = utf8_name[inpos];
 617     }
 618     buffer[outpos] = '"';
 619     i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
 620     free(buffer);
 621 }
 622
 623 /*
 624  * Handle visibility notifications: when none of the bars are visible, e.g.
 625  * if windows are in fullscreen on each output, suspend the child process.
 626  *
 627  */
 628 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 629     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 630     int num_visible = 0;
 631     i3_output *output;
 632
 633     SLIST_FOREACH(output, outputs, slist) {
 634         if (!output->active) {
 635             continue;
 636         }
 637         if (output->bar.id == event->window) {
 638             if (output->visible == visible) {
 639                 return;
 640             }
 641             output->visible = visible;
 642         }
 643         num_visible += output->visible;
 644     }
 645
 646     if (num_visible == 0) {
 647         stop_child();
 648     } else if (num_visible == visible) {
 649         /* Wake the child only when transitioning from 0 to 1 visible bar.
 650          * We cannot transition from 0 to 2 or more visible bars at once since
 651          * visibility events are delivered to each window separately */
 652         cont_child();
 653     }
 654 }
 655
 656 /*
 657  * Adjusts the size of the tray window and alignment of the tray clients by
 658  * configuring their respective x coordinates. To be called when mapping or
 659  * unmapping a tray client window.
 660  *
 661  */
 662 static void configure_trayclients(void) {
 663     trayclient *trayclient;
 664     i3_output *output;
 665     SLIST_FOREACH(output, outputs, slist) {
 666         if (!output->active)
 667             continue;
 668
 669         int clients = 0;
 670         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 671             if (!trayclient->mapped)
 672                 continue;
 673             clients++;
 674
 675             DLOG("Configuring tray window %08x to x=%d\n",
 676                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 677             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 678             xcb_configure_window(xcb_connection,
 679                                  trayclient->win,
 680                                  XCB_CONFIG_WINDOW_X,
 681                                  &x);
 682         }
 683     }
 684 }
 685
 686 /*
 687  * Handles ClientMessages (messages sent from another client directly to us).
 688  *
 689  * At the moment, only the tray window will receive client messages. All
 690  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 691  *
 692  */
 693 static void handle_client_message(xcb_client_message_event_t *event) {
 694     if (event->type == atoms[I3_SYNC]) {
 695         xcb_window_t window = event->data.data32[0];
 696         uint32_t rnd = event->data.data32[1];
 697         /* Forward the request to i3 via the IPC interface so that all pending
 698          * IPC messages are guaranteed to be handled. */
 699         char *payload = NULL;
 700         sasprintf(&payload, "{\"rnd\":%d, \"window\":%d}", rnd, window);
 701         i3_send_msg(I3_IPC_MESSAGE_TYPE_SYNC, payload);
 702         free(payload);
 703     } else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 704                event->format == 32) {
 705         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 706         /* event->data.data32[0] is the timestamp */
 707         uint32_t op = event->data.data32[1];
 708         uint32_t mask;
 709         uint32_t values[2];
 710         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 711             xcb_window_t client = event->data.data32[2];
 712
 713             mask = XCB_CW_EVENT_MASK;
 714
 715             /* Needed to get the most recent value of XEMBED_MAPPED. */
 716             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 717             /* Needed for UnmapNotify events. */
 718             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 719             /* Needed because some tray applications (e.g., VLC) use
 720              * override_redirect which causes no ConfigureRequest to be sent. */
 721             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 722
 723             xcb_change_window_attributes(xcb_connection, client, mask, values);
 724
 725             /* Request the _XEMBED_INFO property. The XEMBED specification
 726              * (which is referred by the tray specification) says this *has* to
 727              * be set, but VLC does not set it… */
 728             bool map_it = true;
 729             int xe_version = 1;
 730             xcb_get_property_cookie_t xembedc;
 731             xcb_generic_error_t *error;
 732             xembedc = xcb_get_property(xcb_connection,
 733                                        0,
 734                                        client,
 735                                        atoms[_XEMBED_INFO],
 736                                        XCB_GET_PROPERTY_TYPE_ANY,
 737                                        0,
 738                                        2 * 32);
 739
 740             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 741                                                                        xembedc,
 742                                                                        &error);
 743             if (error != NULL) {
 744                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 745                      error->error_code);
 746                 free(error);
 747                 return;
 748             }
 749             if (xembedr != NULL && xembedr->length != 0) {
 750                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 751                 uint32_t *xembed = xcb_get_property_value(xembedr);
 752                 DLOG("xembed version = %d\n", xembed[0]);
 753                 DLOG("xembed flags = %d\n", xembed[1]);
 754                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 755                 xe_version = xembed[0];
 756                 if (xe_version > 1)
 757                     xe_version = 1;
 758                 free(xembedr);
 759             } else {
 760                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 761             }
 762
 763             DLOG("X window %08x requested docking\n", client);
 764
 765             if (output_for_tray == NULL) {
 766                 ELOG("No output found for tray\n");
 767                 return;
 768             }
 769
 770             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 771                                                             client,
 772                                                             output_for_tray->bar.id,
 773                                                             output_for_tray->rect.w - icon_size - logical_px(config.tray_padding),
 774                                                             logical_px(config.tray_padding));
 775             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 776                 return;
 777
 778             /* We reconfigure the window to use a reasonable size. The systray
 779              * specification explicitly says:
 780              *   Tray icons may be assigned any size by the system tray, and
 781              *   should do their best to cope with any size effectively
 782              */
 783             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 784             values[0] = icon_size;
 785             values[1] = icon_size;
 786             xcb_configure_window(xcb_connection,
 787                                  client,
 788                                  mask,
 789                                  values);
 790
 791             /* send the XEMBED_EMBEDDED_NOTIFY message */
 792             void *event = scalloc(32, 1);
 793             xcb_client_message_event_t *ev = event;
 794             ev->response_type = XCB_CLIENT_MESSAGE;
 795             ev->window = client;
 796             ev->type = atoms[_XEMBED];
 797             ev->format = 32;
 798             ev->data.data32[0] = XCB_CURRENT_TIME;
 799             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 800             ev->data.data32[2] = output_for_tray->bar.id;
 801             ev->data.data32[3] = xe_version;
 802             xcb_send_event(xcb_connection,
 803                            0,
 804                            client,
 805                            XCB_EVENT_MASK_NO_EVENT,
 806                            (char *)ev);
 807             free(event);
 808
 809             /* Put the client inside the save set. Upon termination (whether
 810              * killed or normal exit does not matter) of i3bar, these clients
 811              * will be correctly reparented to their most closest living
 812              * ancestor. Without this, tray icons might die when i3bar
 813              * exits/crashes. */
 814             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 815
 816             trayclient *tc = smalloc(sizeof(trayclient));
 817             tc->win = client;
 818             tc->xe_version = xe_version;
 819             tc->mapped = false;
 820             TAILQ_INSERT_TAIL(output_for_tray->trayclients, tc, tailq);
 821
 822             if (map_it) {
 823                 DLOG("Mapping dock client\n");
 824                 xcb_map_window(xcb_connection, client);
 825             } else {
 826                 DLOG("Not mapping dock client yet\n");
 827             }
 828             /* Trigger an update to copy the statusline text to the appropriate
 829              * position */
 830             configure_trayclients();
 831             draw_bars(false);
 832         }
 833     }
 834 }
 835
 836 /*
 837  * Handles DestroyNotify events by removing the tray client from the data
 838  * structure. According to the XEmbed protocol, this is one way for a tray
 839  * client to finish the protocol. After this event is received, there is no
 840  * further interaction with the tray client.
 841  *
 842  * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 843  *
 844  */
 845 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 846     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 847
 848     i3_output *walk;
 849     SLIST_FOREACH(walk, outputs, slist) {
 850         if (!walk->active)
 851             continue;
 852         DLOG("checking output %s\n", walk->name);
 853         trayclient *trayclient;
 854         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 855             if (trayclient->win != event->window) {
 856                 continue;
 857             }
 858
 859             DLOG("Removing tray client with window ID %08x\n", event->window);
 860             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 861             FREE(trayclient);
 862
 863             /* Trigger an update, we now have more space for the statusline */
 864             configure_trayclients();
 865             draw_bars(false);
 866             return;
 867         }
 868     }
 869 }
 870
 871 /*
 872  * Handles MapNotify events. These events happen when a tray client shows its
 873  * window. We respond by realigning the tray clients.
 874  *
 875  */
 876 static void handle_map_notify(xcb_map_notify_event_t *event) {
 877     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 878
 879     i3_output *walk;
 880     SLIST_FOREACH(walk, outputs, slist) {
 881         if (!walk->active)
 882             continue;
 883         DLOG("checking output %s\n", walk->name);
 884         trayclient *trayclient;
 885         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 886             if (trayclient->win != event->window)
 887                 continue;
 888
 889             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 890             trayclient->mapped = true;
 891
 892             /* Trigger an update, we now have more space for the statusline */
 893             configure_trayclients();
 894             draw_bars(false);
 895             return;
 896         }
 897     }
 898 }
 899 /*
 900  * Handles UnmapNotify events. These events happen when a tray client hides its
 901  * window. We respond by realigning the tray clients.
 902  *
 903  */
 904 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 905     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 906
 907     i3_output *walk;
 908     SLIST_FOREACH(walk, outputs, slist) {
 909         if (!walk->active)
 910             continue;
 911         DLOG("checking output %s\n", walk->name);
 912         trayclient *trayclient;
 913         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 914             if (trayclient->win != event->window)
 915                 continue;
 916
 917             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 918             trayclient->mapped = false;
 919
 920             /* Trigger an update, we now have more space for the statusline */
 921             configure_trayclients();
 922             draw_bars(false);
 923             return;
 924         }
 925     }
 926 }
 927
 928 /*
 929  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 930  * handled, which tells us whether a dock client should be mapped or unmapped.
 931  *
 932  */
 933 static void handle_property_notify(xcb_property_notify_event_t *event) {
 934     DLOG("PropertyNotify\n");
 935     if (event->atom == atoms[_XEMBED_INFO] &&
 936         event->state == XCB_PROPERTY_NEW_VALUE) {
 937         DLOG("xembed_info updated\n");
 938         trayclient *trayclient = NULL, *walk;
 939         i3_output *o_walk;
 940         SLIST_FOREACH(o_walk, outputs, slist) {
 941             if (!o_walk->active)
 942                 continue;
 943
 944             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 945                 if (walk->win != event->window)
 946                     continue;
 947                 trayclient = walk;
 948                 break;
 949             }
 950
 951             if (trayclient)
 952                 break;
 953         }
 954         if (!trayclient) {
 955             ELOG("PropertyNotify received for unknown window %08x\n",
 956                  event->window);
 957             return;
 958         }
 959         xcb_get_property_cookie_t xembedc;
 960         xembedc = xcb_get_property_unchecked(xcb_connection,
 961                                              0,
 962                                              trayclient->win,
 963                                              atoms[_XEMBED_INFO],
 964                                              XCB_GET_PROPERTY_TYPE_ANY,
 965                                              0,
 966                                              2 * 32);
 967
 968         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 969                                                                    xembedc,
 970                                                                    NULL);
 971         if (xembedr == NULL || xembedr->length == 0) {
 972             DLOG("xembed_info unset\n");
 973             return;
 974         }
 975
 976         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 977         uint32_t *xembed = xcb_get_property_value(xembedr);
 978         DLOG("xembed version = %d\n", xembed[0]);
 979         DLOG("xembed flags = %d\n", xembed[1]);
 980         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 981         DLOG("map state now %d\n", map_it);
 982         if (trayclient->mapped && !map_it) {
 983             /* need to unmap the window */
 984             xcb_unmap_window(xcb_connection, trayclient->win);
 985         } else if (!trayclient->mapped && map_it) {
 986             /* need to map the window */
 987             xcb_map_window(xcb_connection, trayclient->win);
 988         }
 989         free(xembedr);
 990     }
 991 }
 992
 993 /*
 994  * If a tray client attempts to change its size we deny the request and respond
 995  * by telling it its actual size.
 996  *
 997  */
 998 static void handle_configuration_change(xcb_window_t window) {
 999     trayclient *trayclient;
1000     i3_output *output;
1001     SLIST_FOREACH(output, outputs, slist) {
1002         if (!output->active)
1003             continue;
1004
1005         int clients = 0;
1006         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1007             if (!trayclient->mapped)
1008                 continue;
1009             clients++;
1010
1011             if (trayclient->win != window)
1012                 continue;
1013
1014             xcb_rectangle_t rect;
1015             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1016             rect.y = logical_px(config.tray_padding);
1017             rect.width = icon_size;
1018             rect.height = icon_size;
1019
1020             DLOG("This is a tray window. x = %d\n", rect.x);
1021             fake_configure_notify(xcb_connection, rect, window, 0);
1022             return;
1023         }
1024     }
1025
1026     DLOG("WARNING: Could not find corresponding tray window.\n");
1027 }
1028
1029 static void handle_configure_request(xcb_configure_request_event_t *event) {
1030     DLOG("ConfigureRequest for window = %08x\n", event->window);
1031     handle_configuration_change(event->window);
1032 }
1033
1034 static void handle_resize_request(xcb_resize_request_event_t *event) {
1035     DLOG("ResizeRequest for window = %08x\n", event->window);
1036     handle_configuration_change(event->window);
1037 }
1038
1039 /*
1040  * This function is called immediately before the main loop locks. We check for
1041  * events from X11, handle them, then flush our outgoing queue.
1042  *
1043  */
1044 static void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1045     xcb_generic_event_t *event;
1046
1047     if (xcb_connection_has_error(xcb_connection)) {
1048         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1049 #ifdef I3_ASAN_ENABLED
1050         __lsan_do_leak_check();
1051 #endif
1052         exit(1);
1053     }
1054
1055     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1056         if (event->response_type == 0) {
1057             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1058             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1059             free(event);
1060             continue;
1061         }
1062
1063         int type = (event->response_type & ~0x80);
1064
1065         if (type == xkb_base && xkb_base > -1) {
1066             DLOG("received an xkb event\n");
1067
1068             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1069             const uint32_t mod = (config.modifier & 0xFFFF);
1070             mod_pressed = (mod != 0 && (state->mods & mod) == mod);
1071             if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1072                 if (mod_pressed) {
1073                     activated_mode = false;
1074                     unhide_bars();
1075                 } else if (!activated_mode) {
1076                     hide_bars();
1077                 }
1078             }
1079
1080             free(event);
1081             continue;
1082         }
1083
1084         switch (type) {
1085             case XCB_VISIBILITY_NOTIFY:
1086                 /* Visibility change: a bar is [un]obscured by other window */
1087                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1088                 break;
1089             case XCB_EXPOSE:
1090                 if (((xcb_expose_event_t *)event)->count == 0) {
1091                     /* Expose-events happen, when the window needs to be redrawn */
1092                     redraw_bars();
1093                 }
1094
1095                 break;
1096             case XCB_BUTTON_RELEASE:
1097             case XCB_BUTTON_PRESS:
1098                 /* Button press events are mouse buttons clicked on one of our bars */
1099                 handle_button((xcb_button_press_event_t *)event);
1100                 break;
1101             case XCB_CLIENT_MESSAGE:
1102                 /* Client messages are used for client-to-client communication, for
1103                  * example system tray widgets talk to us directly via client messages. */
1104                 handle_client_message((xcb_client_message_event_t *)event);
1105                 break;
1106             case XCB_DESTROY_NOTIFY:
1107                 /* DestroyNotify signifies the end of the XEmbed protocol */
1108                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1109                 break;
1110             case XCB_UNMAP_NOTIFY:
1111                 /* UnmapNotify is received when a tray client hides its window. */
1112                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1113                 break;
1114             case XCB_MAP_NOTIFY:
1115                 handle_map_notify((xcb_map_notify_event_t *)event);
1116                 break;
1117             case XCB_PROPERTY_NOTIFY:
1118                 /* PropertyNotify */
1119                 handle_property_notify((xcb_property_notify_event_t *)event);
1120                 break;
1121             case XCB_CONFIGURE_REQUEST:
1122                 /* ConfigureRequest, sent by a tray child */
1123                 handle_configure_request((xcb_configure_request_event_t *)event);
1124                 break;
1125             case XCB_RESIZE_REQUEST:
1126                 /* ResizeRequest sent by a tray child using override_redirect. */
1127                 handle_resize_request((xcb_resize_request_event_t *)event);
1128                 break;
1129         }
1130         free(event);
1131     }
1132
1133     xcb_flush(xcb_connection);
1134 }
1135
1136 /*
1137  * Dummy callback. We only need this, so that the prepare and check watchers
1138  * are triggered
1139  *
1140  */
1141 static void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1142 }
1143
1144 /*
1145  * Early initialization of the connection to X11: Everything which does not
1146  * depend on 'config'.
1147  *
1148  */
1149 char *init_xcb_early(void) {
1150     /* FIXME: xcb_connect leaks memory */
1151     xcb_connection = xcb_connect(NULL, &screen);
1152     if (xcb_connection_has_error(xcb_connection)) {
1153         ELOG("Cannot open display\n");
1154         exit(EXIT_FAILURE);
1155     }
1156     conn = xcb_connection;
1157     DLOG("Connected to xcb\n");
1158
1159 /* We have to request the atoms we need */
1160 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1161 #include "xcb_atoms.def"
1162
1163     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1164     xcb_root = root_screen->root;
1165
1166     depth = root_screen->root_depth;
1167     colormap = root_screen->default_colormap;
1168     visual_type = get_visualtype(root_screen);
1169
1170     xcb_cursor_context_t *cursor_ctx;
1171     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1172         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1173         xcb_cursor_context_free(cursor_ctx);
1174     } else {
1175         cursor = xcb_generate_id(xcb_connection);
1176         i3Font cursor_font = load_font("cursor", false);
1177         xcb_create_glyph_cursor(
1178             xcb_connection,
1179             cursor,
1180             cursor_font.specific.xcb.id,
1181             cursor_font.specific.xcb.id,
1182             XCB_CURSOR_LEFT_PTR,
1183             XCB_CURSOR_LEFT_PTR + 1,
1184             0, 0, 0,
1185             65535, 65535, 65535);
1186     }
1187
1188     /* The various watchers to communicate with xcb */
1189     xcb_io = smalloc(sizeof(ev_io));
1190     xcb_prep = smalloc(sizeof(ev_prepare));
1191
1192     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1193     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1194
1195     ev_io_start(main_loop, xcb_io);
1196     ev_prepare_start(main_loop, xcb_prep);
1197
1198     /* Now we get the atoms and save them in a nice data structure */
1199     get_atoms();
1200
1201     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1202
1203     return path;
1204 }
1205
1206 /*
1207  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1208  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1209  * in xcb.
1210  *
1211  */
1212 static void register_xkb_keyevents(void) {
1213     const xcb_query_extension_reply_t *extreply;
1214     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1215     if (!extreply->present) {
1216         ELOG("xkb is not present on this server\n");
1217         exit(EXIT_FAILURE);
1218     }
1219     DLOG("initializing xcb-xkb\n");
1220     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1221     xcb_xkb_select_events(conn,
1222                           XCB_XKB_ID_USE_CORE_KBD,
1223                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1224                           0,
1225                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1226                           0xff,
1227                           0xff,
1228                           NULL);
1229     xkb_base = extreply->first_event;
1230 }
1231
1232 /*
1233  * Deregister from xkb keyevents.
1234  *
1235  */
1236 static void deregister_xkb_keyevents(void) {
1237     xcb_xkb_select_events(conn,
1238                           XCB_XKB_ID_USE_CORE_KBD,
1239                           0,
1240                           0,
1241                           0,
1242                           0xff,
1243                           0xff,
1244                           NULL);
1245 }
1246
1247 /*
1248  * Initialization which depends on 'config' being usable. Called after the
1249  * configuration has arrived.
1250  *
1251  */
1252 void init_xcb_late(char *fontname) {
1253     if (fontname == NULL)
1254         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1255
1256     /* Load the font */
1257     font = load_font(fontname, true);
1258     set_font(&font);
1259     DLOG("Calculated font height: %d\n", font.height);
1260     bar_height = font.height + 2 * logical_px(ws_voff_px);
1261     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1262
1263     if (config.separator_symbol)
1264         separator_symbol_width = predict_text_width(config.separator_symbol);
1265
1266     xcb_flush(xcb_connection);
1267
1268     if (config.hide_on_modifier == M_HIDE)
1269         register_xkb_keyevents();
1270 }
1271
1272 /*
1273  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1274  * selection.
1275  *
1276  */
1277 static void send_tray_clientmessage(void) {
1278     uint8_t buffer[32] = {0};
1279     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1280
1281     ev->response_type = XCB_CLIENT_MESSAGE;
1282     ev->window = xcb_root;
1283     ev->type = atoms[MANAGER];
1284     ev->format = 32;
1285     ev->data.data32[0] = XCB_CURRENT_TIME;
1286     ev->data.data32[1] = tray_reply->atom;
1287     ev->data.data32[2] = selwin;
1288
1289     xcb_send_event(xcb_connection,
1290                    0,
1291                    xcb_root,
1292                    0xFFFFFF,
1293                    (char *)buffer);
1294 }
1295
1296 /*
1297  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1298  * for the X11 display we are running on, then acquiring the selection for this
1299  * atom. Afterwards, tray clients will send ClientMessages to our window.
1300  *
1301  */
1302 static void init_tray(void) {
1303     DLOG("Initializing system tray functionality\n");
1304     /* request the tray manager atom for the X11 display we are running on */
1305     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1306     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1307     xcb_intern_atom_cookie_t tray_cookie;
1308     if (tray_reply == NULL)
1309         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1310
1311     /* tray support: we need a window to own the selection */
1312     selwin = xcb_generate_id(xcb_connection);
1313     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1314     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1315     xcb_create_window(xcb_connection,
1316                       depth,
1317                       selwin,
1318                       xcb_root,
1319                       -1, -1,
1320                       1, 1,
1321                       0,
1322                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1323                       visual_type->visual_id,
1324                       selmask,
1325                       selval);
1326
1327     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1328     /* set the atoms */
1329     xcb_change_property(xcb_connection,
1330                         XCB_PROP_MODE_REPLACE,
1331                         selwin,
1332                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1333                         XCB_ATOM_CARDINAL,
1334                         32,
1335                         1,
1336                         &orientation);
1337     xcb_change_property(xcb_connection,
1338                         XCB_PROP_MODE_REPLACE,
1339                         selwin,
1340                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1341                         XCB_ATOM_VISUALID,
1342                         32,
1343                         1,
1344                         &visual_type->visual_id);
1345
1346     init_tray_colors();
1347
1348     if (tray_reply == NULL) {
1349         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1350             ELOG("Could not get atom %s\n", atomname);
1351             exit(EXIT_FAILURE);
1352         }
1353     }
1354
1355     xcb_set_selection_owner(xcb_connection,
1356                             selwin,
1357                             tray_reply->atom,
1358                             XCB_CURRENT_TIME);
1359
1360     /* Verify that we have the selection */
1361     xcb_get_selection_owner_cookie_t selcookie;
1362     xcb_get_selection_owner_reply_t *selreply;
1363
1364     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1365     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1366         ELOG("Could not get selection owner for %s\n", atomname);
1367         exit(EXIT_FAILURE);
1368     }
1369
1370     if (selreply->owner != selwin) {
1371         ELOG("Could not set the %s selection. "
1372              "Maybe another tray is already running?\n",
1373              atomname);
1374         /* NOTE that this error is not fatal. We just can’t provide tray
1375          * functionality */
1376         free(selreply);
1377         return;
1378     }
1379
1380     free(selreply);
1381
1382     send_tray_clientmessage();
1383 }
1384
1385 /*
1386  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1387  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1388  * they assume a light background.
1389  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1390  *
1391  */
1392 void init_tray_colors(void) {
1393     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1394     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1395
1396     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1397
1398     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1399                             {bar_fg[3], bar_fg[4], '\0'},
1400                             {bar_fg[5], bar_fg[6], '\0'}};
1401     const uint8_t r = strtol(strgroups[0], NULL, 16);
1402     const uint8_t g = strtol(strgroups[1], NULL, 16);
1403     const uint8_t b = strtol(strgroups[2], NULL, 16);
1404
1405     const uint16_t r16 = ((uint16_t)r << 8) | r;
1406     const uint16_t g16 = ((uint16_t)g << 8) | g;
1407     const uint16_t b16 = ((uint16_t)b << 8) | b;
1408
1409     const uint32_t tray_colors[12] = {
1410         r16, g16, b16, /* foreground color */
1411         r16, g16, b16, /* error color */
1412         r16, g16, b16, /* warning color */
1413         r16, g16, b16, /* success color */
1414     };
1415
1416     xcb_change_property(xcb_connection,
1417                         XCB_PROP_MODE_REPLACE,
1418                         selwin,
1419                         atoms[_NET_SYSTEM_TRAY_COLORS],
1420                         XCB_ATOM_CARDINAL,
1421                         32,
1422                         12,
1423                         tray_colors);
1424 }
1425
1426 /*
1427  * Cleanup the xcb stuff.
1428  * Called once, before the program terminates.
1429  *
1430  */
1431 void clean_xcb(void) {
1432     free_outputs();
1433
1434     free_font();
1435
1436     xcb_free_cursor(xcb_connection, cursor);
1437     xcb_flush(xcb_connection);
1438     xcb_aux_sync(xcb_connection);
1439     xcb_disconnect(xcb_connection);
1440
1441     ev_prepare_stop(main_loop, xcb_prep);
1442     ev_io_stop(main_loop, xcb_io);
1443
1444     FREE(xcb_prep);
1445     FREE(xcb_io);
1446 }
1447
1448 /*
1449  * Get the earlier requested atoms and save them in the prepared data structure
1450  *
1451  */
1452 void get_atoms(void) {
1453     xcb_intern_atom_reply_t *reply;
1454 #define ATOM_DO(name)                                                        \
1455     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1456     if (reply == NULL) {                                                     \
1457         ELOG("Could not get atom %s\n", #name);                              \
1458         exit(EXIT_FAILURE);                                                  \
1459     }                                                                        \
1460     atoms[name] = reply->atom;                                               \
1461     free(reply);
1462
1463 #include "xcb_atoms.def"
1464     DLOG("Got atoms\n");
1465 }
1466
1467 /*
1468  * Reparents all tray clients of the specified output to the root window. This
1469  * is either used when shutting down, when an output appears (xrandr --output
1470  * VGA1 --off) or when the primary output changes.
1471  *
1472  * Applications using the tray will start the protocol from the beginning again
1473  * afterwards.
1474  *
1475  */
1476 void kick_tray_clients(i3_output *output) {
1477     if (TAILQ_EMPTY(output->trayclients))
1478         return;
1479
1480     trayclient *trayclient;
1481     while (!TAILQ_EMPTY(output->trayclients)) {
1482         trayclient = TAILQ_FIRST(output->trayclients);
1483         /* Unmap, then reparent (to root) the tray client windows */
1484         xcb_unmap_window(xcb_connection, trayclient->win);
1485         xcb_reparent_window(xcb_connection,
1486                             trayclient->win,
1487                             xcb_root,
1488                             0,
1489                             0);
1490
1491         /* We remove the trayclient right here. We might receive an UnmapNotify
1492          * event afterwards, but better safe than sorry. */
1493         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1494         FREE(trayclient);
1495     }
1496
1497     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1498      * We cannot actually destroy the window because then Qt will not restore
1499      * its event mask on the new window. */
1500     uint8_t buffer[32] = {0};
1501     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1502
1503     event->response_type = XCB_DESTROY_NOTIFY;
1504     event->event = selwin;
1505     event->window = selwin;
1506
1507     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1508
1509     send_tray_clientmessage();
1510 }
1511
1512 /*
1513  * Destroy the bar of the specified output
1514  *
1515  */
1516 void destroy_window(i3_output *output) {
1517     if (output == NULL) {
1518         return;
1519     }
1520     if (output->bar.id == XCB_NONE) {
1521         return;
1522     }
1523
1524     kick_tray_clients(output);
1525     xcb_destroy_window(xcb_connection, output->bar.id);
1526     output->bar.id = XCB_NONE;
1527 }
1528
1529 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1530  * by the `position` bar config directive. */
1531 static xcb_void_cookie_t config_strut_partial(i3_output *output) {
1532     /* A local struct to save the strut_partial property */
1533     struct {
1534         uint32_t left;
1535         uint32_t right;
1536         uint32_t top;
1537         uint32_t bottom;
1538         uint32_t left_start_y;
1539         uint32_t left_end_y;
1540         uint32_t right_start_y;
1541         uint32_t right_end_y;
1542         uint32_t top_start_x;
1543         uint32_t top_end_x;
1544         uint32_t bottom_start_x;
1545         uint32_t bottom_end_x;
1546     } __attribute__((__packed__)) strut_partial;
1547     memset(&strut_partial, 0, sizeof(strut_partial));
1548
1549     switch (config.position) {
1550         case POS_NONE:
1551             break;
1552         case POS_TOP:
1553             strut_partial.top = bar_height;
1554             strut_partial.top_start_x = output->rect.x;
1555             strut_partial.top_end_x = output->rect.x + output->rect.w;
1556             break;
1557         case POS_BOT:
1558             strut_partial.bottom = bar_height;
1559             strut_partial.bottom_start_x = output->rect.x;
1560             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1561             break;
1562     }
1563     return xcb_change_property(xcb_connection,
1564                                XCB_PROP_MODE_REPLACE,
1565                                output->bar.id,
1566                                atoms[_NET_WM_STRUT_PARTIAL],
1567                                XCB_ATOM_CARDINAL,
1568                                32,
1569                                12,
1570                                &strut_partial);
1571 }
1572
1573 /*
1574  * Returns the output which should hold the tray, if one exists.
1575  *
1576  * An output is returned in these scenarios:
1577  *   1. A specific output was listed in tray_outputs which is also in the list
1578  *   of outputs managed by this bar.
1579  *   2. No tray_output directive was specified. In this case, we use the first
1580  *   available output.
1581  *   3. 'tray_output primary' was specified. In this case we use the primary
1582  *   output.
1583  *
1584  * Three scenarios in which we specifically don't want to use a tray:
1585  *   1. 'tray_output none' was specified.
1586  *   2. A specific output was listed as a tray_output, but is not one of the
1587  *   outputs managed by this bar. For example, consider tray_outputs == [VGA-1],
1588  *   but outputs == [HDMI-1].
1589  *   3. 'tray_output primary' was specified and no output in the list is
1590  *   primary.
1591  */
1592 static i3_output *get_tray_output(void) {
1593     i3_output *output = NULL;
1594     if (TAILQ_EMPTY(&(config.tray_outputs))) {
1595         /* No tray_output specified, use first active output. */
1596         SLIST_FOREACH(output, outputs, slist) {
1597             if (output->active) {
1598                 return output;
1599             }
1600         }
1601         return NULL;
1602     } else if (strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0) {
1603         /* Check for "tray_output none" */
1604         return NULL;
1605     }
1606
1607     /* If one or more tray_output assignments were specified, we ensure that at
1608      * least one of them is actually an output managed by this instance. */
1609     tray_output_t *tray_output;
1610     TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1611         SLIST_FOREACH(output, outputs, slist) {
1612             if (output->active &&
1613                 (strcasecmp(output->name, tray_output->output) == 0 ||
1614                  (strcasecmp(tray_output->output, "primary") == 0 && output->primary))) {
1615                 return output;
1616             }
1617         }
1618     }
1619
1620     return NULL;
1621 }
1622
1623 /*
1624  * Reconfigure all bars and create new bars for recently activated outputs
1625  *
1626  */
1627 void reconfig_windows(bool redraw_bars) {
1628     uint32_t mask;
1629     uint32_t values[6];
1630
1631     i3_output *walk;
1632     SLIST_FOREACH(walk, outputs, slist) {
1633         if (!walk->active) {
1634             /* If an output is not active, we destroy its bar */
1635             /* FIXME: Maybe we rather want to unmap? */
1636             DLOG("Destroying window for output %s\n", walk->name);
1637             destroy_window(walk);
1638             continue;
1639         }
1640         if (walk->bar.id == XCB_NONE) {
1641             DLOG("Creating window for output %s\n", walk->name);
1642
1643             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1644             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1645             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1646             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1647
1648             values[0] = colors.bar_bg.colorpixel;
1649             values[1] = root_screen->black_pixel;
1650             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1651             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1652             /* We enable the following EventMask fields:
1653              * EXPOSURE, to get expose events (we have to re-draw then)
1654              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1655              *                        child windows use ConfigureWindow
1656              * BUTTON_PRESS, to handle clicks on the workspace buttons
1657              * */
1658             values[3] = XCB_EVENT_MASK_EXPOSURE |
1659                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1660                         XCB_EVENT_MASK_BUTTON_PRESS |
1661                         XCB_EVENT_MASK_BUTTON_RELEASE;
1662             if (config.hide_on_modifier == M_DOCK) {
1663                 /* If the bar is normally visible, catch visibility change events to suspend
1664                  * the status process when the bar is obscured by full-screened windows.  */
1665                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1666                 walk->visible = true;
1667             }
1668             values[4] = colormap;
1669             values[5] = cursor;
1670
1671             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1672                                                                      depth,
1673                                                                      bar_id,
1674                                                                      xcb_root,
1675                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1676                                                                      walk->rect.w, bar_height,
1677                                                                      0,
1678                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1679                                                                      visual_type->visual_id,
1680                                                                      mask,
1681                                                                      values);
1682
1683             /* The double-buffer we use to render stuff off-screen */
1684             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1685                                                                     depth,
1686                                                                     buffer_id,
1687                                                                     bar_id,
1688                                                                     walk->rect.w,
1689                                                                     bar_height);
1690
1691             /* The double-buffer we use to render the statusline before copying to buffer */
1692             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1693                                                                       depth,
1694                                                                       statusline_buffer_id,
1695                                                                       bar_id,
1696                                                                       walk->rect.w,
1697                                                                       bar_height);
1698
1699             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1700             xcb_void_cookie_t class_cookie;
1701             class_cookie = xcb_change_property(xcb_connection,
1702                                                XCB_PROP_MODE_REPLACE,
1703                                                bar_id,
1704                                                XCB_ATOM_WM_CLASS,
1705                                                XCB_ATOM_STRING,
1706                                                8,
1707                                                (strlen("i3bar") + 1) * 2,
1708                                                "i3bar\0i3bar\0");
1709
1710             char *name;
1711             sasprintf(&name, "i3bar for output %s", walk->name);
1712             xcb_void_cookie_t name_cookie;
1713             name_cookie = xcb_change_property(xcb_connection,
1714                                               XCB_PROP_MODE_REPLACE,
1715                                               bar_id,
1716                                               XCB_ATOM_WM_NAME,
1717                                               XCB_ATOM_STRING,
1718                                               8,
1719                                               strlen(name),
1720                                               name);
1721             free(name);
1722
1723             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1724              * this one */
1725             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1726                                                                 XCB_PROP_MODE_REPLACE,
1727                                                                 bar_id,
1728                                                                 atoms[_NET_WM_WINDOW_TYPE],
1729                                                                 XCB_ATOM_ATOM,
1730                                                                 32,
1731                                                                 1,
1732                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1733
1734             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1735             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1736             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1737
1738             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1739
1740             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1741             xcb_void_cookie_t map_cookie;
1742             if (config.hide_on_modifier == M_DOCK) {
1743                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1744             }
1745
1746             if (xcb_request_failed(win_cookie, "Could not create window") ||
1747                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1748                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1749                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1750                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1751                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1752                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1753                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1754                 exit(EXIT_FAILURE);
1755             }
1756
1757         } else {
1758             /* We already have a bar, so we just reconfigure it */
1759             mask = XCB_CONFIG_WINDOW_X |
1760                    XCB_CONFIG_WINDOW_Y |
1761                    XCB_CONFIG_WINDOW_WIDTH |
1762                    XCB_CONFIG_WINDOW_HEIGHT |
1763                    XCB_CONFIG_WINDOW_STACK_MODE;
1764             values[0] = walk->rect.x;
1765             if (config.position == POS_TOP)
1766                 values[1] = walk->rect.y;
1767             else
1768                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1769             values[2] = walk->rect.w;
1770             values[3] = bar_height;
1771             values[4] = XCB_STACK_MODE_ABOVE;
1772
1773             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1774             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1775
1776             DLOG("Destroying buffer for output %s\n", walk->name);
1777             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1778
1779             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1780             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1781
1782             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1783             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1784                                                                         walk->bar.id,
1785                                                                         mask,
1786                                                                         values);
1787
1788             mask = XCB_CW_OVERRIDE_REDIRECT;
1789             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1790             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1791             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1792                                                                         walk->bar.id,
1793                                                                         mask,
1794                                                                         values);
1795
1796             DLOG("Recreating buffer for output %s\n", walk->name);
1797             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1798                                                                     depth,
1799                                                                     walk->buffer.id,
1800                                                                     walk->bar.id,
1801                                                                     walk->rect.w,
1802                                                                     bar_height);
1803
1804             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1805             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1806                                                                       depth,
1807                                                                       walk->statusline_buffer.id,
1808                                                                       walk->bar.id,
1809                                                                       walk->rect.w,
1810                                                                       bar_height);
1811
1812             draw_util_surface_free(xcb_connection, &(walk->bar));
1813             draw_util_surface_free(xcb_connection, &(walk->buffer));
1814             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1815             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1816             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1817             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1818
1819             xcb_void_cookie_t map_cookie, umap_cookie;
1820             if (redraw_bars) {
1821                 /* Unmap the window, and draw it again when in dock mode */
1822                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1823                 if (config.hide_on_modifier == M_DOCK) {
1824                     cont_child();
1825                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1826                 } else {
1827                     stop_child();
1828                 }
1829
1830                 if (config.hide_on_modifier == M_HIDE) {
1831                     /* Switching to hide mode, register for keyevents */
1832                     register_xkb_keyevents();
1833                 } else {
1834                     /* Switching to dock/invisible mode, deregister from keyevents */
1835                     deregister_xkb_keyevents();
1836                 }
1837             }
1838
1839             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1840                 xcb_request_failed(chg_cookie, "Could not change window") ||
1841                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1842                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1843                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1844                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1845                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1846                 exit(EXIT_FAILURE);
1847             }
1848         }
1849     }
1850
1851     /* Finally, check if we want to initialize the tray or destroy the selection
1852      * window. The result of get_tray_output() is cached. */
1853     output_for_tray = get_tray_output();
1854     if (output_for_tray) {
1855         if (selwin == XCB_NONE) {
1856             init_tray();
1857         }
1858     } else if (selwin != XCB_NONE) {
1859         DLOG("Destroying tray selection window\n");
1860         xcb_destroy_window(xcb_connection, selwin);
1861         selwin = XCB_NONE;
1862     }
1863 }
1864
1865 /*
1866  * Render the bars, with buttons and statusline
1867  *
1868  */
1869 void draw_bars(bool unhide) {
1870     DLOG("Drawing bars...\n");
1871
1872     uint32_t full_statusline_width = predict_statusline_length(false);
1873     uint32_t short_statusline_width = predict_statusline_length(true);
1874
1875     i3_output *outputs_walk;
1876     SLIST_FOREACH(outputs_walk, outputs, slist) {
1877         int workspace_width = 0;
1878
1879         if (!outputs_walk->active) {
1880             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1881             continue;
1882         }
1883         if (outputs_walk->bar.id == XCB_NONE) {
1884             /* Oh shit, an active output without an own bar. Create it now! */
1885             reconfig_windows(false);
1886         }
1887
1888         bool use_focus_colors = output_has_focus(outputs_walk);
1889
1890         /* First things first: clear the backbuffer */
1891         draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1892
1893         if (!config.disable_ws) {
1894             i3_ws *ws_walk;
1895             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1896                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1897                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1898                 color_t fg_color = colors.inactive_ws_fg;
1899                 color_t bg_color = colors.inactive_ws_bg;
1900                 color_t border_color = colors.inactive_ws_border;
1901                 if (ws_walk->visible) {
1902                     if (!ws_walk->focused) {
1903                         fg_color = colors.active_ws_fg;
1904                         bg_color = colors.active_ws_bg;
1905                         border_color = colors.active_ws_border;
1906                     } else {
1907                         fg_color = colors.focus_ws_fg;
1908                         bg_color = colors.focus_ws_bg;
1909                         border_color = colors.focus_ws_border;
1910                     }
1911                 }
1912                 if (ws_walk->urgent) {
1913                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1914                     fg_color = colors.urgent_ws_fg;
1915                     bg_color = colors.urgent_ws_bg;
1916                     border_color = colors.urgent_ws_border;
1917                     unhide = true;
1918                 }
1919
1920                 /* Draw the border of the button. */
1921                 draw_util_rectangle(&(outputs_walk->buffer), border_color,
1922                                     workspace_width,
1923                                     logical_px(1),
1924                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1925                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1926
1927                 /* Draw the inside of the button. */
1928                 draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1929                                     workspace_width + logical_px(1),
1930                                     2 * logical_px(1),
1931                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1932                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1933
1934                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
1935                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1936                                logical_px(ws_voff_px),
1937                                ws_walk->name_width);
1938
1939                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1940                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1941                     workspace_width += logical_px(ws_spacing_px);
1942             }
1943         }
1944
1945         if (binding.name && !config.disable_binding_mode_indicator) {
1946             workspace_width += logical_px(ws_spacing_px);
1947
1948             color_t fg_color = colors.binding_mode_fg;
1949             color_t bg_color = colors.binding_mode_bg;
1950
1951             draw_util_rectangle(&(outputs_walk->buffer), colors.binding_mode_border,
1952                                 workspace_width,
1953                                 logical_px(1),
1954                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1955                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1956
1957             draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1958                                 workspace_width + logical_px(1),
1959                                 2 * logical_px(1),
1960                                 binding.width + 2 * logical_px(ws_hoff_px),
1961                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1962
1963             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
1964                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1965                            logical_px(ws_voff_px),
1966                            binding.width);
1967
1968             unhide = true;
1969             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
1970         }
1971
1972         if (!TAILQ_EMPTY(&statusline_head)) {
1973             DLOG("Printing statusline!\n");
1974
1975             int tray_width = get_tray_width(outputs_walk->trayclients);
1976             uint32_t hoff = logical_px(((workspace_width > 0) + (tray_width > 0)) * sb_hoff_px);
1977             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - hoff;
1978             uint32_t clip_left = 0;
1979             uint32_t statusline_width = full_statusline_width;
1980             bool use_short_text = false;
1981
1982             if (statusline_width > max_statusline_width) {
1983                 statusline_width = short_statusline_width;
1984                 use_short_text = true;
1985                 if (statusline_width > max_statusline_width) {
1986                     clip_left = statusline_width - max_statusline_width;
1987                 }
1988             }
1989
1990             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
1991             int x_dest = outputs_walk->rect.w - tray_width - logical_px((tray_width > 0) * sb_hoff_px) - visible_statusline_width;
1992
1993             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
1994             draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
1995                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
1996
1997             outputs_walk->statusline_width = statusline_width;
1998             outputs_walk->statusline_short_text = use_short_text;
1999         }
2000     }
2001
2002     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2003     if (mod_pressed ||
2004         config.hidden_state == S_SHOW ||
2005         unhide) {
2006         unhide_bars();
2007     } else if (config.hide_on_modifier == M_HIDE) {
2008         hide_bars();
2009     }
2010
2011     redraw_bars();
2012 }
2013
2014 /*
2015  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2016  *
2017  */
2018 void redraw_bars(void) {
2019     i3_output *outputs_walk;
2020     SLIST_FOREACH(outputs_walk, outputs, slist) {
2021         if (!outputs_walk->active) {
2022             continue;
2023         }
2024
2025         draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2026                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2027         xcb_flush(xcb_connection);
2028     }
2029 }
2030
2031 /*
2032  * Set the current binding mode
2033  *
2034  */
2035 void set_current_mode(struct mode *current) {
2036     I3STRING_FREE(binding.name);
2037     binding = *current;
2038     activated_mode = binding.name != NULL;
2039 }