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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 int 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 parsed colors */
  96 struct xcb_colors_t {
  97     color_t bar_fg;
  98     color_t bar_bg;
  99     color_t sep_fg;
 100     color_t focus_bar_fg;
 101     color_t focus_bar_bg;
 102     color_t focus_sep_fg;
 103     color_t active_ws_fg;
 104     color_t active_ws_bg;
 105     color_t active_ws_border;
 106     color_t inactive_ws_fg;
 107     color_t inactive_ws_bg;
 108     color_t inactive_ws_border;
 109     color_t urgent_ws_bg;
 110     color_t urgent_ws_fg;
 111     color_t urgent_ws_border;
 112     color_t focus_ws_bg;
 113     color_t focus_ws_fg;
 114     color_t focus_ws_border;
 115     color_t binding_mode_bg;
 116     color_t binding_mode_fg;
 117     color_t binding_mode_border;
 118 };
 119 struct xcb_colors_t colors;
 120
 121 /* Horizontal offset between a workspace label and button borders */
 122 static const int ws_hoff_px = 4;
 123
 124 /* Vertical offset between a workspace label and button borders */
 125 static const int ws_voff_px = 3;
 126
 127 /* Offset between two workspace buttons */
 128 static const int ws_spacing_px = 1;
 129
 130 /* Offset between the statusline and 1) workspace buttons on the left
 131  *                                   2) the tray or screen edge on the right */
 132 static const int sb_hoff_px = 4;
 133
 134 /* Additional offset between the tray and the statusline, if the tray is not empty */
 135 static const int tray_loff_px = 2;
 136
 137 /* Vertical offset between the bar and a separator */
 138 static const int sep_voff_px = 4;
 139
 140 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 141     xcb_generic_error_t *err;
 142     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 143         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 144         return err->error_code;
 145     }
 146     return 0;
 147 }
 148
 149 uint32_t get_sep_offset(struct status_block *block) {
 150     if (!block->no_separator && block->sep_block_width > 0)
 151         return block->sep_block_width / 2 + block->sep_block_width % 2;
 152     return 0;
 153 }
 154
 155 int get_tray_width(struct tc_head *trayclients) {
 156     trayclient *trayclient;
 157     int tray_width = 0;
 158     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 159         if (!trayclient->mapped)
 160             continue;
 161         tray_width += icon_size + logical_px(config.tray_padding);
 162     }
 163     if (tray_width > 0)
 164         tray_width += logical_px(tray_loff_px);
 165     return tray_width;
 166 }
 167
 168 /*
 169  * Draws a separator for the given block if necessary.
 170  *
 171  */
 172 static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
 173     color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
 174     color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 175
 176     uint32_t sep_offset = get_sep_offset(block);
 177     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 178         return;
 179
 180     uint32_t center_x = x - sep_offset;
 181     if (config.separator_symbol == NULL) {
 182         /* Draw a classic one pixel, vertical separator. */
 183         draw_util_rectangle(&output->statusline_buffer, sep_fg,
 184                             center_x,
 185                             logical_px(sep_voff_px),
 186                             logical_px(1),
 187                             bar_height - 2 * logical_px(sep_voff_px));
 188     } else {
 189         /* Draw a custom separator. */
 190         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 191         draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
 192                        separator_x, logical_px(ws_voff_px), x - separator_x);
 193     }
 194 }
 195
 196 uint32_t predict_statusline_length(bool use_short_text) {
 197     uint32_t width = 0;
 198     struct status_block *block;
 199
 200     TAILQ_FOREACH(block, &statusline_head, blocks) {
 201         i3String *text = block->full_text;
 202         struct status_block_render_desc *render = &block->full_render;
 203         if (use_short_text && block->short_text != NULL) {
 204             text = block->short_text;
 205             render = &block->short_render;
 206         }
 207
 208         if (i3string_get_num_bytes(text) == 0)
 209             continue;
 210
 211         render->width = predict_text_width(text);
 212         if (block->border)
 213             render->width += logical_px(2);
 214
 215         /* Compute offset and append for text aligment in min_width. */
 216         if (block->min_width <= render->width) {
 217             render->x_offset = 0;
 218             render->x_append = 0;
 219         } else {
 220             uint32_t padding_width = block->min_width - render->width;
 221             switch (block->align) {
 222                 case ALIGN_LEFT:
 223                     render->x_append = padding_width;
 224                     break;
 225                 case ALIGN_RIGHT:
 226                     render->x_offset = padding_width;
 227                     break;
 228                 case ALIGN_CENTER:
 229                     render->x_offset = padding_width / 2;
 230                     render->x_append = padding_width / 2 + padding_width % 2;
 231                     break;
 232             }
 233         }
 234
 235         width += render->width + render->x_offset + render->x_append;
 236
 237         /* If this is not the last block, add some pixels for a separator. */
 238         if (TAILQ_NEXT(block, blocks) != NULL)
 239             width += block->sep_block_width;
 240     }
 241
 242     return width;
 243 }
 244
 245 /*
 246  * Redraws the statusline to the output's statusline_buffer
 247  */
 248 void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
 249     struct status_block *block;
 250
 251     color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 252     draw_util_clear_surface(&output->statusline_buffer, bar_color);
 253
 254     /* Use unsigned integer wraparound to clip off the left side.
 255      * For example, if clip_left is 75, then x will start at the very large
 256      * number INT_MAX-75, which is way outside the surface dimensions. Drawing
 257      * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
 258      * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
 259      * actually rendering content to the surface. */
 260     uint32_t x = 0 - clip_left;
 261
 262     /* Draw the text of each block */
 263     TAILQ_FOREACH(block, &statusline_head, blocks) {
 264         i3String *text = block->full_text;
 265         struct status_block_render_desc *render = &block->full_render;
 266         if (use_short_text && block->short_text != NULL) {
 267             text = block->short_text;
 268             render = &block->short_render;
 269         }
 270
 271         if (i3string_get_num_bytes(text) == 0)
 272             continue;
 273
 274         color_t fg_color;
 275         if (block->urgent) {
 276             fg_color = colors.urgent_ws_fg;
 277         } else if (block->color) {
 278             fg_color = draw_util_hex_to_color(block->color);
 279         } else if (use_focus_colors) {
 280             fg_color = colors.focus_bar_fg;
 281         } else {
 282             fg_color = colors.bar_fg;
 283         }
 284
 285         color_t bg_color = bar_color;
 286
 287         int border_width = (block->border) ? logical_px(1) : 0;
 288         int full_render_width = render->width + render->x_offset + render->x_append;
 289         if (block->border || block->background || block->urgent) {
 290             /* Let's determine the colors first. */
 291             color_t border_color = bar_color;
 292             if (block->urgent) {
 293                 border_color = colors.urgent_ws_border;
 294                 bg_color = colors.urgent_ws_bg;
 295             } else {
 296                 if (block->border)
 297                     border_color = draw_util_hex_to_color(block->border);
 298                 if (block->background)
 299                     bg_color = draw_util_hex_to_color(block->background);
 300             }
 301
 302             /* Draw the border. */
 303             draw_util_rectangle(&output->statusline_buffer, border_color,
 304                                 x, logical_px(1),
 305                                 full_render_width,
 306                                 bar_height - logical_px(2));
 307
 308             /* Draw the background. */
 309             draw_util_rectangle(&output->statusline_buffer, bg_color,
 310                                 x + border_width,
 311                                 logical_px(1) + border_width,
 312                                 full_render_width - 2 * border_width,
 313                                 bar_height - 2 * border_width - logical_px(2));
 314         }
 315
 316         draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
 317                        x + render->x_offset + border_width, logical_px(ws_voff_px),
 318                        render->width - 2 * border_width);
 319         x += full_render_width;
 320
 321         /* If this is not the last block, draw a separator. */
 322         if (TAILQ_NEXT(block, blocks) != NULL) {
 323             x += block->sep_block_width;
 324             draw_separator(output, x, block, use_focus_colors);
 325         }
 326     }
 327 }
 328
 329 /*
 330  * Hides all bars (unmaps them)
 331  *
 332  */
 333 void hide_bars(void) {
 334     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 335         return;
 336     }
 337
 338     i3_output *walk;
 339     SLIST_FOREACH(walk, outputs, slist) {
 340         if (!walk->active) {
 341             continue;
 342         }
 343         xcb_unmap_window(xcb_connection, walk->bar.id);
 344     }
 345     stop_child();
 346 }
 347
 348 /*
 349  * Unhides all bars (maps them)
 350  *
 351  */
 352 void unhide_bars(void) {
 353     if (config.hide_on_modifier != M_HIDE) {
 354         return;
 355     }
 356
 357     i3_output *walk;
 358     xcb_void_cookie_t cookie;
 359     uint32_t mask;
 360     uint32_t values[5];
 361
 362     cont_child();
 363
 364     SLIST_FOREACH(walk, outputs, slist) {
 365         if (walk->bar.id == XCB_NONE) {
 366             continue;
 367         }
 368         mask = XCB_CONFIG_WINDOW_X |
 369                XCB_CONFIG_WINDOW_Y |
 370                XCB_CONFIG_WINDOW_WIDTH |
 371                XCB_CONFIG_WINDOW_HEIGHT |
 372                XCB_CONFIG_WINDOW_STACK_MODE;
 373         values[0] = walk->rect.x;
 374         if (config.position == POS_TOP)
 375             values[1] = walk->rect.y;
 376         else
 377             values[1] = walk->rect.y + walk->rect.h - bar_height;
 378         values[2] = walk->rect.w;
 379         values[3] = bar_height;
 380         values[4] = XCB_STACK_MODE_ABOVE;
 381         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 382         cookie = xcb_configure_window_checked(xcb_connection,
 383                                               walk->bar.id,
 384                                               mask,
 385                                               values);
 386
 387         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 388             exit(EXIT_FAILURE);
 389         }
 390         xcb_map_window(xcb_connection, walk->bar.id);
 391     }
 392 }
 393
 394 /*
 395  * Parse the colors into a format that we can use
 396  *
 397  */
 398 void init_colors(const struct xcb_color_strings_t *new_colors) {
 399 #define PARSE_COLOR(name, def)                                                           \
 400     do {                                                                                 \
 401         colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
 402     } while (0)
 403     PARSE_COLOR(bar_fg, "#FFFFFF");
 404     PARSE_COLOR(bar_bg, "#000000");
 405     PARSE_COLOR(sep_fg, "#666666");
 406     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 407     PARSE_COLOR(active_ws_bg, "#333333");
 408     PARSE_COLOR(active_ws_border, "#333333");
 409     PARSE_COLOR(inactive_ws_fg, "#888888");
 410     PARSE_COLOR(inactive_ws_bg, "#222222");
 411     PARSE_COLOR(inactive_ws_border, "#333333");
 412     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 413     PARSE_COLOR(urgent_ws_bg, "#900000");
 414     PARSE_COLOR(urgent_ws_border, "#2f343a");
 415     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 416     PARSE_COLOR(focus_ws_bg, "#285577");
 417     PARSE_COLOR(focus_ws_border, "#4c7899");
 418 #undef PARSE_COLOR
 419
 420 #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
 421     do {                                                                                             \
 422         colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
 423     } while (0)
 424
 425     /* For the binding mode indicator colors, we don't hardcode a default.
 426      * Instead, we fall back to urgent_ws_* colors. */
 427     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 428     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 429     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 430
 431     /* Similarly, for unspecified focused bar colors, we fall back to the
 432      * regular bar colors. */
 433     PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
 434     PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
 435     PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
 436 #undef PARSE_COLOR_FALLBACK
 437
 438     init_tray_colors();
 439     xcb_flush(xcb_connection);
 440 }
 441
 442 static bool execute_custom_command(xcb_keycode_t input_code, bool event_is_release) {
 443     binding_t *binding;
 444     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 445         if ((binding->input_code != input_code) || (binding->release != event_is_release))
 446             continue;
 447
 448         i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, binding->command);
 449         return true;
 450     }
 451     return false;
 452 }
 453
 454 /*
 455  * Handle a button press event (i.e. a mouse click on one of our bars).
 456  * We determine, whether the click occurred on a workspace button or if the scroll-
 457  * wheel was used and change the workspace appropriately
 458  *
 459  */
 460 void handle_button(xcb_button_press_event_t *event) {
 461     /* Determine, which bar was clicked */
 462     i3_output *walk;
 463     xcb_window_t bar = event->event;
 464     SLIST_FOREACH(walk, outputs, slist) {
 465         if (walk->bar.id == bar) {
 466             break;
 467         }
 468     }
 469
 470     if (walk == NULL) {
 471         DLOG("Unknown bar clicked!\n");
 472         return;
 473     }
 474
 475     DLOG("Got button %d\n", event->detail);
 476
 477     /* During button release events, only check for custom commands. */
 478     const bool event_is_release = (event->response_type & ~0x80) == XCB_BUTTON_RELEASE;
 479     if (event_is_release) {
 480         execute_custom_command(event->detail, event_is_release);
 481         return;
 482     }
 483
 484     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 485     int workspace_width = 0;
 486     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 487
 488     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 489         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 490         if (x >= workspace_width && x <= workspace_width + w)
 491             clicked_ws = ws_walk;
 492         if (ws_walk->visible)
 493             cur_ws = ws_walk;
 494         workspace_width += w;
 495         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 496             workspace_width += logical_px(ws_spacing_px);
 497     }
 498
 499     if (x > workspace_width && child_want_click_events()) {
 500         /* If the child asked for click events,
 501          * check if a status block has been clicked. */
 502         int tray_width = get_tray_width(walk->trayclients);
 503         int block_x = 0, last_block_x;
 504         int offset = walk->rect.w - walk->statusline_width - tray_width - logical_px(sb_hoff_px);
 505         int32_t statusline_x = x - offset;
 506
 507         if (statusline_x >= 0 && statusline_x < walk->statusline_width) {
 508             struct status_block *block;
 509             int sep_offset_remainder = 0;
 510
 511             TAILQ_FOREACH(block, &statusline_head, blocks) {
 512                 i3String *text = block->full_text;
 513                 struct status_block_render_desc *render = &block->full_render;
 514                 if (walk->statusline_short_text && block->short_text != NULL) {
 515                     text = block->short_text;
 516                     render = &block->short_render;
 517                 }
 518
 519                 if (i3string_get_num_bytes(text) == 0)
 520                     continue;
 521
 522                 last_block_x = block_x;
 523                 block_x += render->width + render->x_offset + render->x_append + get_sep_offset(block) + sep_offset_remainder;
 524
 525                 if (statusline_x <= block_x && statusline_x >= last_block_x) {
 526                     send_block_clicked(event->detail, block->name, block->instance,
 527                                        event->root_x, event->root_y, statusline_x - last_block_x, event->event_y, block_x - last_block_x, bar_height);
 528                     return;
 529                 }
 530
 531                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 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     strncpy(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             i3_output *output = NULL;
 765             i3_output *walk = NULL;
 766             tray_output_t *tray_output = NULL;
 767             /* We need to iterate through the tray_output assignments first in
 768              * order to prioritize them. Otherwise, if this bar manages two
 769              * outputs and both are assigned as tray_output as well, the first
 770              * output in our list would receive the tray rather than the first
 771              * one defined via tray_output. */
 772             TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
 773                 SLIST_FOREACH(walk, outputs, slist) {
 774                     if (!walk->active)
 775                         continue;
 776
 777                     if (strcasecmp(walk->name, tray_output->output) == 0) {
 778                         DLOG("Found tray_output assignment for output %s.\n", walk->name);
 779                         output = walk;
 780                         break;
 781                     }
 782
 783                     if (walk->primary && strcasecmp("primary", tray_output->output) == 0) {
 784                         DLOG("Found tray_output assignment on primary output %s.\n", walk->name);
 785                         output = walk;
 786                         break;
 787                     }
 788                 }
 789
 790                 /* If we found an output, we're done. */
 791                 if (output != NULL)
 792                     break;
 793             }
 794
 795             /* If no tray_output has been specified, we fall back to the first
 796              * available output. */
 797             if (output == NULL && TAILQ_EMPTY(&(config.tray_outputs))) {
 798                 SLIST_FOREACH(walk, outputs, slist) {
 799                     if (!walk->active)
 800                         continue;
 801                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 802                     output = walk;
 803                     break;
 804                 }
 805             }
 806
 807             if (output == NULL) {
 808                 ELOG("No output found\n");
 809                 return;
 810             }
 811
 812             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 813                                                             client,
 814                                                             output->bar.id,
 815                                                             output->rect.w - icon_size - logical_px(config.tray_padding),
 816                                                             logical_px(config.tray_padding));
 817             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 818                 return;
 819
 820             /* We reconfigure the window to use a reasonable size. The systray
 821              * specification explicitly says:
 822              *   Tray icons may be assigned any size by the system tray, and
 823              *   should do their best to cope with any size effectively
 824              */
 825             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 826             values[0] = icon_size;
 827             values[1] = icon_size;
 828             xcb_configure_window(xcb_connection,
 829                                  client,
 830                                  mask,
 831                                  values);
 832
 833             /* send the XEMBED_EMBEDDED_NOTIFY message */
 834             void *event = scalloc(32, 1);
 835             xcb_client_message_event_t *ev = event;
 836             ev->response_type = XCB_CLIENT_MESSAGE;
 837             ev->window = client;
 838             ev->type = atoms[_XEMBED];
 839             ev->format = 32;
 840             ev->data.data32[0] = XCB_CURRENT_TIME;
 841             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 842             ev->data.data32[2] = output->bar.id;
 843             ev->data.data32[3] = xe_version;
 844             xcb_send_event(xcb_connection,
 845                            0,
 846                            client,
 847                            XCB_EVENT_MASK_NO_EVENT,
 848                            (char *)ev);
 849             free(event);
 850
 851             /* Put the client inside the save set. Upon termination (whether
 852              * killed or normal exit does not matter) of i3bar, these clients
 853              * will be correctly reparented to their most closest living
 854              * ancestor. Without this, tray icons might die when i3bar
 855              * exits/crashes. */
 856             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 857
 858             trayclient *tc = smalloc(sizeof(trayclient));
 859             tc->win = client;
 860             tc->xe_version = xe_version;
 861             tc->mapped = false;
 862             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 863
 864             if (map_it) {
 865                 DLOG("Mapping dock client\n");
 866                 xcb_map_window(xcb_connection, client);
 867             } else {
 868                 DLOG("Not mapping dock client yet\n");
 869             }
 870             /* Trigger an update to copy the statusline text to the appropriate
 871              * position */
 872             configure_trayclients();
 873             draw_bars(false);
 874         }
 875     }
 876 }
 877
 878 /*
 879  * Handles DestroyNotify events by removing the tray client from the data
 880  * structure. According to the XEmbed protocol, this is one way for a tray
 881  * client to finish the protocol. After this event is received, there is no
 882  * further interaction with the tray client.
 883  *
 884  * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 885  *
 886  */
 887 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 888     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 889
 890     i3_output *walk;
 891     SLIST_FOREACH(walk, outputs, slist) {
 892         if (!walk->active)
 893             continue;
 894         DLOG("checking output %s\n", walk->name);
 895         trayclient *trayclient;
 896         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 897             if (trayclient->win != event->window) {
 898                 continue;
 899             }
 900
 901             DLOG("Removing tray client with window ID %08x\n", event->window);
 902             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 903             FREE(trayclient);
 904
 905             /* Trigger an update, we now have more space for the statusline */
 906             configure_trayclients();
 907             draw_bars(false);
 908             return;
 909         }
 910     }
 911 }
 912
 913 /*
 914  * Handles MapNotify events. These events happen when a tray client shows its
 915  * window. We respond by realigning the tray clients.
 916  *
 917  */
 918 static void handle_map_notify(xcb_map_notify_event_t *event) {
 919     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 920
 921     i3_output *walk;
 922     SLIST_FOREACH(walk, outputs, slist) {
 923         if (!walk->active)
 924             continue;
 925         DLOG("checking output %s\n", walk->name);
 926         trayclient *trayclient;
 927         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 928             if (trayclient->win != event->window)
 929                 continue;
 930
 931             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 932             trayclient->mapped = true;
 933
 934             /* Trigger an update, we now have more space for the statusline */
 935             configure_trayclients();
 936             draw_bars(false);
 937             return;
 938         }
 939     }
 940 }
 941 /*
 942  * Handles UnmapNotify events. These events happen when a tray client hides its
 943  * window. We respond by realigning the tray clients.
 944  *
 945  */
 946 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 947     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 948
 949     i3_output *walk;
 950     SLIST_FOREACH(walk, outputs, slist) {
 951         if (!walk->active)
 952             continue;
 953         DLOG("checking output %s\n", walk->name);
 954         trayclient *trayclient;
 955         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 956             if (trayclient->win != event->window)
 957                 continue;
 958
 959             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 960             trayclient->mapped = false;
 961
 962             /* Trigger an update, we now have more space for the statusline */
 963             configure_trayclients();
 964             draw_bars(false);
 965             return;
 966         }
 967     }
 968 }
 969
 970 /*
 971  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 972  * handled, which tells us whether a dock client should be mapped or unmapped.
 973  *
 974  */
 975 static void handle_property_notify(xcb_property_notify_event_t *event) {
 976     DLOG("PropertyNotify\n");
 977     if (event->atom == atoms[_XEMBED_INFO] &&
 978         event->state == XCB_PROPERTY_NEW_VALUE) {
 979         DLOG("xembed_info updated\n");
 980         trayclient *trayclient = NULL, *walk;
 981         i3_output *o_walk;
 982         SLIST_FOREACH(o_walk, outputs, slist) {
 983             if (!o_walk->active)
 984                 continue;
 985
 986             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 987                 if (walk->win != event->window)
 988                     continue;
 989                 trayclient = walk;
 990                 break;
 991             }
 992
 993             if (trayclient)
 994                 break;
 995         }
 996         if (!trayclient) {
 997             ELOG("PropertyNotify received for unknown window %08x\n",
 998                  event->window);
 999             return;
1000         }
1001         xcb_get_property_cookie_t xembedc;
1002         xembedc = xcb_get_property_unchecked(xcb_connection,
1003                                              0,
1004                                              trayclient->win,
1005                                              atoms[_XEMBED_INFO],
1006                                              XCB_GET_PROPERTY_TYPE_ANY,
1007                                              0,
1008                                              2 * 32);
1009
1010         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
1011                                                                    xembedc,
1012                                                                    NULL);
1013         if (xembedr == NULL || xembedr->length == 0) {
1014             DLOG("xembed_info unset\n");
1015             return;
1016         }
1017
1018         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
1019         uint32_t *xembed = xcb_get_property_value(xembedr);
1020         DLOG("xembed version = %d\n", xembed[0]);
1021         DLOG("xembed flags = %d\n", xembed[1]);
1022         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
1023         DLOG("map state now %d\n", map_it);
1024         if (trayclient->mapped && !map_it) {
1025             /* need to unmap the window */
1026             xcb_unmap_window(xcb_connection, trayclient->win);
1027         } else if (!trayclient->mapped && map_it) {
1028             /* need to map the window */
1029             xcb_map_window(xcb_connection, trayclient->win);
1030         }
1031         free(xembedr);
1032     }
1033 }
1034
1035 /*
1036  * If a tray client attempts to change its size we deny the request and respond
1037  * by telling it its actual size.
1038  *
1039  */
1040 static void handle_configuration_change(xcb_window_t window) {
1041     trayclient *trayclient;
1042     i3_output *output;
1043     SLIST_FOREACH(output, outputs, slist) {
1044         if (!output->active)
1045             continue;
1046
1047         int clients = 0;
1048         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1049             if (!trayclient->mapped)
1050                 continue;
1051             clients++;
1052
1053             if (trayclient->win != window)
1054                 continue;
1055
1056             xcb_rectangle_t rect;
1057             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1058             rect.y = logical_px(config.tray_padding);
1059             rect.width = icon_size;
1060             rect.height = icon_size;
1061
1062             DLOG("This is a tray window. x = %d\n", rect.x);
1063             fake_configure_notify(xcb_connection, rect, window, 0);
1064             return;
1065         }
1066     }
1067
1068     DLOG("WARNING: Could not find corresponding tray window.\n");
1069 }
1070
1071 static void handle_configure_request(xcb_configure_request_event_t *event) {
1072     DLOG("ConfigureRequest for window = %08x\n", event->window);
1073     handle_configuration_change(event->window);
1074 }
1075
1076 static void handle_resize_request(xcb_resize_request_event_t *event) {
1077     DLOG("ResizeRequest for window = %08x\n", event->window);
1078     handle_configuration_change(event->window);
1079 }
1080
1081 /*
1082  * This function is called immediately before the main loop locks. We check for
1083  * events from X11, handle them, then flush our outgoing queue.
1084  *
1085  */
1086 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1087     xcb_generic_event_t *event;
1088
1089     if (xcb_connection_has_error(xcb_connection)) {
1090         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1091 #ifdef I3_ASAN_ENABLED
1092         __lsan_do_leak_check();
1093 #endif
1094         exit(1);
1095     }
1096
1097     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1098         if (event->response_type == 0) {
1099             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1100             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1101             free(event);
1102             continue;
1103         }
1104
1105         int type = (event->response_type & ~0x80);
1106
1107         if (type == xkb_base && xkb_base > -1) {
1108             DLOG("received an xkb event\n");
1109
1110             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1111             if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1112                 int modstate = state->mods & config.modifier;
1113
1114 #define DLOGMOD(modmask, status)                        \
1115     do {                                                \
1116         switch (modmask) {                              \
1117             case ShiftMask:                             \
1118                 DLOG("ShiftMask got " #status "!\n");   \
1119                 break;                                  \
1120             case ControlMask:                           \
1121                 DLOG("ControlMask got " #status "!\n"); \
1122                 break;                                  \
1123             case Mod1Mask:                              \
1124                 DLOG("Mod1Mask got " #status "!\n");    \
1125                 break;                                  \
1126             case Mod2Mask:                              \
1127                 DLOG("Mod2Mask got " #status "!\n");    \
1128                 break;                                  \
1129             case Mod3Mask:                              \
1130                 DLOG("Mod3Mask got " #status "!\n");    \
1131                 break;                                  \
1132             case Mod4Mask:                              \
1133                 DLOG("Mod4Mask got " #status "!\n");    \
1134                 break;                                  \
1135             case Mod5Mask:                              \
1136                 DLOG("Mod5Mask got " #status "!\n");    \
1137                 break;                                  \
1138         }                                               \
1139     } while (0)
1140
1141                 if (modstate != mod_pressed) {
1142                     if (modstate == 0) {
1143                         DLOGMOD(config.modifier, released);
1144                         if (!activated_mode)
1145                             hide_bars();
1146                     } else {
1147                         DLOGMOD(config.modifier, pressed);
1148                         activated_mode = false;
1149                         unhide_bars();
1150                     }
1151                     mod_pressed = modstate;
1152                 }
1153 #undef DLOGMOD
1154             }
1155
1156             free(event);
1157             continue;
1158         }
1159
1160         switch (type) {
1161             case XCB_VISIBILITY_NOTIFY:
1162                 /* Visibility change: a bar is [un]obscured by other window */
1163                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1164                 break;
1165             case XCB_EXPOSE:
1166                 if (((xcb_expose_event_t *)event)->count == 0) {
1167                     /* Expose-events happen, when the window needs to be redrawn */
1168                     redraw_bars();
1169                 }
1170
1171                 break;
1172             case XCB_BUTTON_RELEASE:
1173             case XCB_BUTTON_PRESS:
1174                 /* Button press events are mouse buttons clicked on one of our bars */
1175                 handle_button((xcb_button_press_event_t *)event);
1176                 break;
1177             case XCB_CLIENT_MESSAGE:
1178                 /* Client messages are used for client-to-client communication, for
1179                  * example system tray widgets talk to us directly via client messages. */
1180                 handle_client_message((xcb_client_message_event_t *)event);
1181                 break;
1182             case XCB_DESTROY_NOTIFY:
1183                 /* DestroyNotify signifies the end of the XEmbed protocol */
1184                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1185                 break;
1186             case XCB_UNMAP_NOTIFY:
1187                 /* UnmapNotify is received when a tray client hides its window. */
1188                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1189                 break;
1190             case XCB_MAP_NOTIFY:
1191                 handle_map_notify((xcb_map_notify_event_t *)event);
1192                 break;
1193             case XCB_PROPERTY_NOTIFY:
1194                 /* PropertyNotify */
1195                 handle_property_notify((xcb_property_notify_event_t *)event);
1196                 break;
1197             case XCB_CONFIGURE_REQUEST:
1198                 /* ConfigureRequest, sent by a tray child */
1199                 handle_configure_request((xcb_configure_request_event_t *)event);
1200                 break;
1201             case XCB_RESIZE_REQUEST:
1202                 /* ResizeRequest sent by a tray child using override_redirect. */
1203                 handle_resize_request((xcb_resize_request_event_t *)event);
1204                 break;
1205         }
1206         free(event);
1207     }
1208
1209     xcb_flush(xcb_connection);
1210 }
1211
1212 /*
1213  * Dummy callback. We only need this, so that the prepare and check watchers
1214  * are triggered
1215  *
1216  */
1217 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1218 }
1219
1220 /*
1221  * Early initialization of the connection to X11: Everything which does not
1222  * depend on 'config'.
1223  *
1224  */
1225 char *init_xcb_early() {
1226     /* FIXME: xcb_connect leaks memory */
1227     xcb_connection = xcb_connect(NULL, &screen);
1228     if (xcb_connection_has_error(xcb_connection)) {
1229         ELOG("Cannot open display\n");
1230         exit(EXIT_FAILURE);
1231     }
1232     conn = xcb_connection;
1233     DLOG("Connected to xcb\n");
1234
1235 /* We have to request the atoms we need */
1236 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1237 #include "xcb_atoms.def"
1238
1239     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1240     xcb_root = root_screen->root;
1241
1242     depth = root_screen->root_depth;
1243     colormap = root_screen->default_colormap;
1244     visual_type = get_visualtype(root_screen);
1245
1246     xcb_cursor_context_t *cursor_ctx;
1247     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1248         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1249         xcb_cursor_context_free(cursor_ctx);
1250     } else {
1251         cursor = xcb_generate_id(xcb_connection);
1252         i3Font cursor_font = load_font("cursor", false);
1253         xcb_create_glyph_cursor(
1254             xcb_connection,
1255             cursor,
1256             cursor_font.specific.xcb.id,
1257             cursor_font.specific.xcb.id,
1258             XCB_CURSOR_LEFT_PTR,
1259             XCB_CURSOR_LEFT_PTR + 1,
1260             0, 0, 0,
1261             65535, 65535, 65535);
1262     }
1263
1264     /* The various watchers to communicate with xcb */
1265     xcb_io = smalloc(sizeof(ev_io));
1266     xcb_prep = smalloc(sizeof(ev_prepare));
1267
1268     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1269     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1270
1271     ev_io_start(main_loop, xcb_io);
1272     ev_prepare_start(main_loop, xcb_prep);
1273
1274     /* Now we get the atoms and save them in a nice data structure */
1275     get_atoms();
1276
1277     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1278
1279     return path;
1280 }
1281
1282 /*
1283  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1284  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1285  * in xcb.
1286  *
1287  */
1288 void register_xkb_keyevents() {
1289     const xcb_query_extension_reply_t *extreply;
1290     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1291     if (!extreply->present) {
1292         ELOG("xkb is not present on this server\n");
1293         exit(EXIT_FAILURE);
1294     }
1295     DLOG("initializing xcb-xkb\n");
1296     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1297     xcb_xkb_select_events(conn,
1298                           XCB_XKB_ID_USE_CORE_KBD,
1299                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1300                           0,
1301                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1302                           0xff,
1303                           0xff,
1304                           NULL);
1305     xkb_base = extreply->first_event;
1306 }
1307
1308 /*
1309  * Deregister from xkb keyevents.
1310  *
1311  */
1312 void deregister_xkb_keyevents() {
1313     xcb_xkb_select_events(conn,
1314                           XCB_XKB_ID_USE_CORE_KBD,
1315                           0,
1316                           0,
1317                           0,
1318                           0xff,
1319                           0xff,
1320                           NULL);
1321 }
1322
1323 /*
1324  * Initialization which depends on 'config' being usable. Called after the
1325  * configuration has arrived.
1326  *
1327  */
1328 void init_xcb_late(char *fontname) {
1329     if (fontname == NULL)
1330         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1331
1332     /* Load the font */
1333     font = load_font(fontname, true);
1334     set_font(&font);
1335     DLOG("Calculated font height: %d\n", font.height);
1336     bar_height = font.height + 2 * logical_px(ws_voff_px);
1337     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1338
1339     if (config.separator_symbol)
1340         separator_symbol_width = predict_text_width(config.separator_symbol);
1341
1342     xcb_flush(xcb_connection);
1343
1344     if (config.hide_on_modifier == M_HIDE)
1345         register_xkb_keyevents();
1346 }
1347
1348 /*
1349  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1350  * selection.
1351  *
1352  */
1353 static void send_tray_clientmessage(void) {
1354     uint8_t buffer[32] = {0};
1355     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1356
1357     ev->response_type = XCB_CLIENT_MESSAGE;
1358     ev->window = xcb_root;
1359     ev->type = atoms[MANAGER];
1360     ev->format = 32;
1361     ev->data.data32[0] = XCB_CURRENT_TIME;
1362     ev->data.data32[1] = tray_reply->atom;
1363     ev->data.data32[2] = selwin;
1364
1365     xcb_send_event(xcb_connection,
1366                    0,
1367                    xcb_root,
1368                    0xFFFFFF,
1369                    (char *)buffer);
1370 }
1371
1372 /*
1373  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1374  * for the X11 display we are running on, then acquiring the selection for this
1375  * atom. Afterwards, tray clients will send ClientMessages to our window.
1376  *
1377  */
1378 void init_tray(void) {
1379     DLOG("Initializing system tray functionality\n");
1380     /* request the tray manager atom for the X11 display we are running on */
1381     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1382     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1383     xcb_intern_atom_cookie_t tray_cookie;
1384     if (tray_reply == NULL)
1385         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1386
1387     /* tray support: we need a window to own the selection */
1388     selwin = xcb_generate_id(xcb_connection);
1389     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1390     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1391     xcb_create_window(xcb_connection,
1392                       depth,
1393                       selwin,
1394                       xcb_root,
1395                       -1, -1,
1396                       1, 1,
1397                       0,
1398                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1399                       visual_type->visual_id,
1400                       selmask,
1401                       selval);
1402
1403     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1404     /* set the atoms */
1405     xcb_change_property(xcb_connection,
1406                         XCB_PROP_MODE_REPLACE,
1407                         selwin,
1408                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1409                         XCB_ATOM_CARDINAL,
1410                         32,
1411                         1,
1412                         &orientation);
1413     xcb_change_property(xcb_connection,
1414                         XCB_PROP_MODE_REPLACE,
1415                         selwin,
1416                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1417                         XCB_ATOM_VISUALID,
1418                         32,
1419                         1,
1420                         &visual_type->visual_id);
1421
1422     init_tray_colors();
1423
1424     if (tray_reply == NULL) {
1425         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1426             ELOG("Could not get atom %s\n", atomname);
1427             exit(EXIT_FAILURE);
1428         }
1429     }
1430
1431     xcb_set_selection_owner(xcb_connection,
1432                             selwin,
1433                             tray_reply->atom,
1434                             XCB_CURRENT_TIME);
1435
1436     /* Verify that we have the selection */
1437     xcb_get_selection_owner_cookie_t selcookie;
1438     xcb_get_selection_owner_reply_t *selreply;
1439
1440     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1441     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1442         ELOG("Could not get selection owner for %s\n", atomname);
1443         exit(EXIT_FAILURE);
1444     }
1445
1446     if (selreply->owner != selwin) {
1447         ELOG("Could not set the %s selection. "
1448              "Maybe another tray is already running?\n",
1449              atomname);
1450         /* NOTE that this error is not fatal. We just can’t provide tray
1451          * functionality */
1452         free(selreply);
1453         return;
1454     }
1455
1456     free(selreply);
1457
1458     send_tray_clientmessage();
1459 }
1460
1461 /*
1462  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1463  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1464  * they assume a light background.
1465  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1466  *
1467  */
1468 void init_tray_colors(void) {
1469     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1470     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1471
1472     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1473
1474     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1475                             {bar_fg[3], bar_fg[4], '\0'},
1476                             {bar_fg[5], bar_fg[6], '\0'}};
1477     const uint8_t r = strtol(strgroups[0], NULL, 16);
1478     const uint8_t g = strtol(strgroups[1], NULL, 16);
1479     const uint8_t b = strtol(strgroups[2], NULL, 16);
1480
1481     const uint16_t r16 = ((uint16_t)r << 8) | r;
1482     const uint16_t g16 = ((uint16_t)g << 8) | g;
1483     const uint16_t b16 = ((uint16_t)b << 8) | b;
1484
1485     const uint32_t tray_colors[12] = {
1486         r16, g16, b16, /* foreground color */
1487         r16, g16, b16, /* error color */
1488         r16, g16, b16, /* warning color */
1489         r16, g16, b16, /* success color */
1490     };
1491
1492     xcb_change_property(xcb_connection,
1493                         XCB_PROP_MODE_REPLACE,
1494                         selwin,
1495                         atoms[_NET_SYSTEM_TRAY_COLORS],
1496                         XCB_ATOM_CARDINAL,
1497                         32,
1498                         12,
1499                         tray_colors);
1500 }
1501
1502 /*
1503  * Cleanup the xcb stuff.
1504  * Called once, before the program terminates.
1505  *
1506  */
1507 void clean_xcb(void) {
1508     free_outputs();
1509
1510     free_font();
1511
1512     xcb_free_cursor(xcb_connection, cursor);
1513     xcb_flush(xcb_connection);
1514     xcb_aux_sync(xcb_connection);
1515     xcb_disconnect(xcb_connection);
1516
1517     ev_prepare_stop(main_loop, xcb_prep);
1518     ev_io_stop(main_loop, xcb_io);
1519
1520     FREE(xcb_prep);
1521     FREE(xcb_io);
1522 }
1523
1524 /*
1525  * Get the earlier requested atoms and save them in the prepared data structure
1526  *
1527  */
1528 void get_atoms(void) {
1529     xcb_intern_atom_reply_t *reply;
1530 #define ATOM_DO(name)                                                        \
1531     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1532     if (reply == NULL) {                                                     \
1533         ELOG("Could not get atom %s\n", #name);                              \
1534         exit(EXIT_FAILURE);                                                  \
1535     }                                                                        \
1536     atoms[name] = reply->atom;                                               \
1537     free(reply);
1538
1539 #include "xcb_atoms.def"
1540     DLOG("Got atoms\n");
1541 }
1542
1543 /*
1544  * Reparents all tray clients of the specified output to the root window. This
1545  * is either used when shutting down, when an output appears (xrandr --output
1546  * VGA1 --off) or when the primary output changes.
1547  *
1548  * Applications using the tray will start the protocol from the beginning again
1549  * afterwards.
1550  *
1551  */
1552 void kick_tray_clients(i3_output *output) {
1553     if (TAILQ_EMPTY(output->trayclients))
1554         return;
1555
1556     trayclient *trayclient;
1557     while (!TAILQ_EMPTY(output->trayclients)) {
1558         trayclient = TAILQ_FIRST(output->trayclients);
1559         /* Unmap, then reparent (to root) the tray client windows */
1560         xcb_unmap_window(xcb_connection, trayclient->win);
1561         xcb_reparent_window(xcb_connection,
1562                             trayclient->win,
1563                             xcb_root,
1564                             0,
1565                             0);
1566
1567         /* We remove the trayclient right here. We might receive an UnmapNotify
1568          * event afterwards, but better safe than sorry. */
1569         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1570         FREE(trayclient);
1571     }
1572
1573     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1574      * We cannot actually destroy the window because then Qt will not restore
1575      * its event mask on the new window. */
1576     uint8_t buffer[32] = {0};
1577     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1578
1579     event->response_type = XCB_DESTROY_NOTIFY;
1580     event->event = selwin;
1581     event->window = selwin;
1582
1583     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1584
1585     send_tray_clientmessage();
1586 }
1587
1588 /*
1589  * Destroy the bar of the specified output
1590  *
1591  */
1592 void destroy_window(i3_output *output) {
1593     if (output == NULL) {
1594         return;
1595     }
1596     if (output->bar.id == XCB_NONE) {
1597         return;
1598     }
1599
1600     kick_tray_clients(output);
1601     xcb_destroy_window(xcb_connection, output->bar.id);
1602     output->bar.id = XCB_NONE;
1603 }
1604
1605 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1606  * by the `position` bar config directive. */
1607 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1608     /* A local struct to save the strut_partial property */
1609     struct {
1610         uint32_t left;
1611         uint32_t right;
1612         uint32_t top;
1613         uint32_t bottom;
1614         uint32_t left_start_y;
1615         uint32_t left_end_y;
1616         uint32_t right_start_y;
1617         uint32_t right_end_y;
1618         uint32_t top_start_x;
1619         uint32_t top_end_x;
1620         uint32_t bottom_start_x;
1621         uint32_t bottom_end_x;
1622     } __attribute__((__packed__)) strut_partial;
1623     memset(&strut_partial, 0, sizeof(strut_partial));
1624
1625     switch (config.position) {
1626         case POS_NONE:
1627             break;
1628         case POS_TOP:
1629             strut_partial.top = bar_height;
1630             strut_partial.top_start_x = output->rect.x;
1631             strut_partial.top_end_x = output->rect.x + output->rect.w;
1632             break;
1633         case POS_BOT:
1634             strut_partial.bottom = bar_height;
1635             strut_partial.bottom_start_x = output->rect.x;
1636             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1637             break;
1638     }
1639     return xcb_change_property(xcb_connection,
1640                                XCB_PROP_MODE_REPLACE,
1641                                output->bar.id,
1642                                atoms[_NET_WM_STRUT_PARTIAL],
1643                                XCB_ATOM_CARDINAL,
1644                                32,
1645                                12,
1646                                &strut_partial);
1647 }
1648
1649 /*
1650  * Reconfigure all bars and create new bars for recently activated outputs
1651  *
1652  */
1653 void reconfig_windows(bool redraw_bars) {
1654     uint32_t mask;
1655     uint32_t values[6];
1656     static bool tray_configured = false;
1657
1658     i3_output *walk;
1659     SLIST_FOREACH(walk, outputs, slist) {
1660         if (!walk->active) {
1661             /* If an output is not active, we destroy its bar */
1662             /* FIXME: Maybe we rather want to unmap? */
1663             DLOG("Destroying window for output %s\n", walk->name);
1664             destroy_window(walk);
1665             continue;
1666         }
1667         if (walk->bar.id == XCB_NONE) {
1668             DLOG("Creating window for output %s\n", walk->name);
1669
1670             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1671             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1672             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1673             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1674
1675             values[0] = colors.bar_bg.colorpixel;
1676             values[1] = root_screen->black_pixel;
1677             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1678             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1679             /* We enable the following EventMask fields:
1680              * EXPOSURE, to get expose events (we have to re-draw then)
1681              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1682              *                        child windows use ConfigureWindow
1683              * BUTTON_PRESS, to handle clicks on the workspace buttons
1684              * */
1685             values[3] = XCB_EVENT_MASK_EXPOSURE |
1686                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1687                         XCB_EVENT_MASK_BUTTON_PRESS |
1688                         XCB_EVENT_MASK_BUTTON_RELEASE;
1689             if (config.hide_on_modifier == M_DOCK) {
1690                 /* If the bar is normally visible, catch visibility change events to suspend
1691                  * the status process when the bar is obscured by full-screened windows.  */
1692                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1693                 walk->visible = true;
1694             }
1695             values[4] = colormap;
1696             values[5] = cursor;
1697
1698             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1699                                                                      depth,
1700                                                                      bar_id,
1701                                                                      xcb_root,
1702                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1703                                                                      walk->rect.w, bar_height,
1704                                                                      0,
1705                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1706                                                                      visual_type->visual_id,
1707                                                                      mask,
1708                                                                      values);
1709
1710             /* The double-buffer we use to render stuff off-screen */
1711             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1712                                                                     depth,
1713                                                                     buffer_id,
1714                                                                     bar_id,
1715                                                                     walk->rect.w,
1716                                                                     bar_height);
1717
1718             /* The double-buffer we use to render the statusline before copying to buffer */
1719             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1720                                                                       depth,
1721                                                                       statusline_buffer_id,
1722                                                                       bar_id,
1723                                                                       walk->rect.w,
1724                                                                       bar_height);
1725
1726             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1727             xcb_void_cookie_t class_cookie;
1728             class_cookie = xcb_change_property(xcb_connection,
1729                                                XCB_PROP_MODE_REPLACE,
1730                                                bar_id,
1731                                                XCB_ATOM_WM_CLASS,
1732                                                XCB_ATOM_STRING,
1733                                                8,
1734                                                (strlen("i3bar") + 1) * 2,
1735                                                "i3bar\0i3bar\0");
1736
1737             char *name;
1738             sasprintf(&name, "i3bar for output %s", walk->name);
1739             xcb_void_cookie_t name_cookie;
1740             name_cookie = xcb_change_property(xcb_connection,
1741                                               XCB_PROP_MODE_REPLACE,
1742                                               bar_id,
1743                                               XCB_ATOM_WM_NAME,
1744                                               XCB_ATOM_STRING,
1745                                               8,
1746                                               strlen(name),
1747                                               name);
1748             free(name);
1749
1750             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1751              * this one */
1752             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1753                                                                 XCB_PROP_MODE_REPLACE,
1754                                                                 bar_id,
1755                                                                 atoms[_NET_WM_WINDOW_TYPE],
1756                                                                 XCB_ATOM_ATOM,
1757                                                                 32,
1758                                                                 1,
1759                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1760
1761             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1762             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1763             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1764
1765             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1766
1767             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1768             xcb_void_cookie_t map_cookie;
1769             if (config.hide_on_modifier == M_DOCK) {
1770                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1771             }
1772
1773             if (xcb_request_failed(win_cookie, "Could not create window") ||
1774                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1775                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1776                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1777                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1778                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1779                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1780                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1781                 exit(EXIT_FAILURE);
1782             }
1783
1784             /* Unless "tray_output none" was specified, we need to initialize the tray. */
1785             bool no_tray = false;
1786             if (!(TAILQ_EMPTY(&(config.tray_outputs)))) {
1787                 no_tray = strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0;
1788             }
1789
1790             /*
1791              * There are three scenarios in which we need to initialize the tray:
1792              *   1. A specific output was listed in tray_outputs which is also
1793              *      in the list of outputs managed by this bar.
1794              *   2. No tray_output directive was specified. In this case, we
1795              *      use the first available output.
1796              *   3. 'tray_output primary' was specified. In this case we use the
1797              *      primary output.
1798              *
1799              * Three scenarios in which we specifically don't want to
1800              * initialize the tray are:
1801              *   1. 'tray_output none' was specified.
1802              *   2. A specific output was listed as a tray_output, but is not
1803              *      one of the outputs managed by this bar. For example, consider
1804              *      tray_outputs == [VGA-1], but outputs == [HDMI-1].
1805              *   3. 'tray_output primary' was specified and no output in the list
1806              *      is primary.
1807              */
1808             if (!tray_configured && !no_tray) {
1809                 /* If no tray_output was specified, we go ahead and initialize the tray as
1810                  * we will be using the first available output. */
1811                 if (TAILQ_EMPTY(&(config.tray_outputs))) {
1812                     init_tray();
1813                 }
1814
1815                 /* If one or more tray_output assignments were specified, we ensure that at least one of
1816                  * them is actually an output managed by this instance. */
1817                 tray_output_t *tray_output;
1818                 TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1819                     i3_output *output;
1820                     bool found = false;
1821                     SLIST_FOREACH(output, outputs, slist) {
1822                         if (strcasecmp(output->name, tray_output->output) == 0 ||
1823                             (strcasecmp(tray_output->output, "primary") == 0 && output->primary)) {
1824                             found = true;
1825                             init_tray();
1826                             break;
1827                         }
1828                     }
1829
1830                     if (found)
1831                         break;
1832                 }
1833
1834                 tray_configured = true;
1835             }
1836         } else {
1837             /* We already have a bar, so we just reconfigure it */
1838             mask = XCB_CONFIG_WINDOW_X |
1839                    XCB_CONFIG_WINDOW_Y |
1840                    XCB_CONFIG_WINDOW_WIDTH |
1841                    XCB_CONFIG_WINDOW_HEIGHT |
1842                    XCB_CONFIG_WINDOW_STACK_MODE;
1843             values[0] = walk->rect.x;
1844             if (config.position == POS_TOP)
1845                 values[1] = walk->rect.y;
1846             else
1847                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1848             values[2] = walk->rect.w;
1849             values[3] = bar_height;
1850             values[4] = XCB_STACK_MODE_ABOVE;
1851
1852             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1853             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1854
1855             DLOG("Destroying buffer for output %s\n", walk->name);
1856             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1857
1858             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1859             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1860
1861             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1862             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1863                                                                         walk->bar.id,
1864                                                                         mask,
1865                                                                         values);
1866
1867             mask = XCB_CW_OVERRIDE_REDIRECT;
1868             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1869             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1870             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1871                                                                         walk->bar.id,
1872                                                                         mask,
1873                                                                         values);
1874
1875             DLOG("Recreating buffer for output %s\n", walk->name);
1876             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1877                                                                     depth,
1878                                                                     walk->buffer.id,
1879                                                                     walk->bar.id,
1880                                                                     walk->rect.w,
1881                                                                     bar_height);
1882
1883             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1884             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1885                                                                       depth,
1886                                                                       walk->statusline_buffer.id,
1887                                                                       walk->bar.id,
1888                                                                       walk->rect.w,
1889                                                                       bar_height);
1890
1891             draw_util_surface_free(xcb_connection, &(walk->bar));
1892             draw_util_surface_free(xcb_connection, &(walk->buffer));
1893             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1894             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1895             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1896             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1897
1898             xcb_void_cookie_t map_cookie, umap_cookie;
1899             if (redraw_bars) {
1900                 /* Unmap the window, and draw it again when in dock mode */
1901                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1902                 if (config.hide_on_modifier == M_DOCK) {
1903                     cont_child();
1904                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1905                 } else {
1906                     stop_child();
1907                 }
1908
1909                 if (config.hide_on_modifier == M_HIDE) {
1910                     /* Switching to hide mode, register for keyevents */
1911                     register_xkb_keyevents();
1912                 } else {
1913                     /* Switching to dock/invisible mode, deregister from keyevents */
1914                     deregister_xkb_keyevents();
1915                 }
1916             }
1917
1918             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1919                 xcb_request_failed(chg_cookie, "Could not change window") ||
1920                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1921                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1922                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1923                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1924                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1925                 exit(EXIT_FAILURE);
1926             }
1927         }
1928     }
1929 }
1930
1931 /*
1932  * Render the bars, with buttons and statusline
1933  *
1934  */
1935 void draw_bars(bool unhide) {
1936     DLOG("Drawing bars...\n");
1937
1938     uint32_t full_statusline_width = predict_statusline_length(false);
1939     uint32_t short_statusline_width = predict_statusline_length(true);
1940
1941     i3_output *outputs_walk;
1942     SLIST_FOREACH(outputs_walk, outputs, slist) {
1943         int workspace_width = 0;
1944
1945         if (!outputs_walk->active) {
1946             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1947             continue;
1948         }
1949         if (outputs_walk->bar.id == XCB_NONE) {
1950             /* Oh shit, an active output without an own bar. Create it now! */
1951             reconfig_windows(false);
1952         }
1953
1954         bool use_focus_colors = output_has_focus(outputs_walk);
1955
1956         /* First things first: clear the backbuffer */
1957         draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1958
1959         if (!config.disable_ws) {
1960             i3_ws *ws_walk;
1961             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1962                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1963                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1964                 color_t fg_color = colors.inactive_ws_fg;
1965                 color_t bg_color = colors.inactive_ws_bg;
1966                 color_t border_color = colors.inactive_ws_border;
1967                 if (ws_walk->visible) {
1968                     if (!ws_walk->focused) {
1969                         fg_color = colors.active_ws_fg;
1970                         bg_color = colors.active_ws_bg;
1971                         border_color = colors.active_ws_border;
1972                     } else {
1973                         fg_color = colors.focus_ws_fg;
1974                         bg_color = colors.focus_ws_bg;
1975                         border_color = colors.focus_ws_border;
1976                     }
1977                 }
1978                 if (ws_walk->urgent) {
1979                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1980                     fg_color = colors.urgent_ws_fg;
1981                     bg_color = colors.urgent_ws_bg;
1982                     border_color = colors.urgent_ws_border;
1983                     unhide = true;
1984                 }
1985
1986                 /* Draw the border of the button. */
1987                 draw_util_rectangle(&(outputs_walk->buffer), border_color,
1988                                     workspace_width,
1989                                     logical_px(1),
1990                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1991                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1992
1993                 /* Draw the inside of the button. */
1994                 draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1995                                     workspace_width + logical_px(1),
1996                                     2 * logical_px(1),
1997                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1998                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1999
2000                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
2001                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2002                                logical_px(ws_voff_px),
2003                                ws_walk->name_width);
2004
2005                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
2006                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
2007                     workspace_width += logical_px(ws_spacing_px);
2008             }
2009         }
2010
2011         if (binding.name && !config.disable_binding_mode_indicator) {
2012             workspace_width += logical_px(ws_spacing_px);
2013
2014             color_t fg_color = colors.binding_mode_fg;
2015             color_t bg_color = colors.binding_mode_bg;
2016
2017             draw_util_rectangle(&(outputs_walk->buffer), colors.binding_mode_border,
2018                                 workspace_width,
2019                                 logical_px(1),
2020                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
2021                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
2022
2023             draw_util_rectangle(&(outputs_walk->buffer), bg_color,
2024                                 workspace_width + logical_px(1),
2025                                 2 * logical_px(1),
2026                                 binding.width + 2 * logical_px(ws_hoff_px),
2027                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
2028
2029             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
2030                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2031                            logical_px(ws_voff_px),
2032                            binding.width);
2033
2034             unhide = true;
2035             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
2036         }
2037
2038         if (!TAILQ_EMPTY(&statusline_head)) {
2039             DLOG("Printing statusline!\n");
2040
2041             int tray_width = get_tray_width(outputs_walk->trayclients);
2042             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
2043             uint32_t clip_left = 0;
2044             uint32_t statusline_width = full_statusline_width;
2045             bool use_short_text = false;
2046
2047             if (statusline_width > max_statusline_width) {
2048                 statusline_width = short_statusline_width;
2049                 use_short_text = true;
2050                 if (statusline_width > max_statusline_width) {
2051                     clip_left = statusline_width - max_statusline_width;
2052                 }
2053             }
2054
2055             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
2056             int x_dest = outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width;
2057
2058             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
2059             draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2060                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2061
2062             outputs_walk->statusline_width = statusline_width;
2063             outputs_walk->statusline_short_text = use_short_text;
2064         }
2065     }
2066
2067     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2068     if (mod_pressed ||
2069         config.hidden_state == S_SHOW ||
2070         unhide) {
2071         unhide_bars();
2072     } else if (config.hide_on_modifier == M_HIDE) {
2073         hide_bars();
2074     }
2075
2076     redraw_bars();
2077 }
2078
2079 /*
2080  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2081  *
2082  */
2083 void redraw_bars(void) {
2084     i3_output *outputs_walk;
2085     SLIST_FOREACH(outputs_walk, outputs, slist) {
2086         if (!outputs_walk->active) {
2087             continue;
2088         }
2089
2090         draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2091                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2092         xcb_flush(xcb_connection);
2093     }
2094 }
2095
2096 /*
2097  * Set the current binding mode
2098  *
2099  */
2100 void set_current_mode(struct mode *current) {
2101     I3STRING_FREE(binding.name);
2102     binding = *current;
2103     activated_mode = binding.name != NULL;
2104     return;
2105 }