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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_check *xcb_chk;
  87 ev_io *xcb_io;
  88 ev_io *xkb_io;
  89
  90 /* The name of current binding mode */
  91 static mode binding;
  92
  93 /* Indicates whether a new binding mode was recently activated */
  94 bool activated_mode = false;
  95
  96 /* The parsed colors */
  97 struct xcb_colors_t {
  98     color_t bar_fg;
  99     color_t bar_bg;
 100     color_t sep_fg;
 101     color_t focus_bar_fg;
 102     color_t focus_bar_bg;
 103     color_t focus_sep_fg;
 104     color_t active_ws_fg;
 105     color_t active_ws_bg;
 106     color_t active_ws_border;
 107     color_t inactive_ws_fg;
 108     color_t inactive_ws_bg;
 109     color_t inactive_ws_border;
 110     color_t urgent_ws_bg;
 111     color_t urgent_ws_fg;
 112     color_t urgent_ws_border;
 113     color_t focus_ws_bg;
 114     color_t focus_ws_fg;
 115     color_t focus_ws_border;
 116     color_t binding_mode_bg;
 117     color_t binding_mode_fg;
 118     color_t binding_mode_border;
 119 };
 120 struct xcb_colors_t colors;
 121
 122 /* Horizontal offset between a workspace label and button borders */
 123 static const int ws_hoff_px = 4;
 124
 125 /* Vertical offset between a workspace label and button borders */
 126 static const int ws_voff_px = 3;
 127
 128 /* Offset between two workspace buttons */
 129 static const int ws_spacing_px = 1;
 130
 131 /* Offset between the statusline and 1) workspace buttons on the left
 132  *                                   2) the tray or screen edge on the right */
 133 static const int sb_hoff_px = 4;
 134
 135 /* Additional offset between the tray and the statusline, if the tray is not empty */
 136 static const int tray_loff_px = 2;
 137
 138 /* Vertical offset between the bar and a separator */
 139 static const int sep_voff_px = 4;
 140
 141 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 142     xcb_generic_error_t *err;
 143     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 144         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 145         return err->error_code;
 146     }
 147     return 0;
 148 }
 149
 150 uint32_t get_sep_offset(struct status_block *block) {
 151     if (!block->no_separator && block->sep_block_width > 0)
 152         return block->sep_block_width / 2 + block->sep_block_width % 2;
 153     return 0;
 154 }
 155
 156 int get_tray_width(struct tc_head *trayclients) {
 157     trayclient *trayclient;
 158     int tray_width = 0;
 159     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 160         if (!trayclient->mapped)
 161             continue;
 162         tray_width += icon_size + logical_px(config.tray_padding);
 163     }
 164     if (tray_width > 0)
 165         tray_width += logical_px(tray_loff_px);
 166     return tray_width;
 167 }
 168
 169 /*
 170  * Draws a separator for the given block if necessary.
 171  *
 172  */
 173 static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
 174     color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
 175     color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 176
 177     uint32_t sep_offset = get_sep_offset(block);
 178     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 179         return;
 180
 181     uint32_t center_x = x - sep_offset;
 182     if (config.separator_symbol == NULL) {
 183         /* Draw a classic one pixel, vertical separator. */
 184         draw_util_rectangle(xcb_connection, &output->statusline_buffer, sep_fg,
 185                             center_x,
 186                             logical_px(sep_voff_px),
 187                             logical_px(1),
 188                             bar_height - 2 * logical_px(sep_voff_px));
 189     } else {
 190         /* Draw a custom separator. */
 191         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 192         draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
 193                        separator_x, logical_px(ws_voff_px), x - separator_x);
 194     }
 195 }
 196
 197 uint32_t predict_statusline_length(bool use_short_text) {
 198     uint32_t width = 0;
 199     struct status_block *block;
 200
 201     TAILQ_FOREACH(block, &statusline_head, blocks) {
 202         i3String *text = block->full_text;
 203         struct status_block_render_desc *render = &block->full_render;
 204         if (use_short_text && block->short_text != NULL) {
 205             text = block->short_text;
 206             render = &block->short_render;
 207         }
 208
 209         if (i3string_get_num_bytes(text) == 0)
 210             continue;
 211
 212         render->width = predict_text_width(text);
 213         if (block->border)
 214             render->width += logical_px(2);
 215
 216         /* Compute offset and append for text aligment in min_width. */
 217         if (block->min_width <= render->width) {
 218             render->x_offset = 0;
 219             render->x_append = 0;
 220         } else {
 221             uint32_t padding_width = block->min_width - render->width;
 222             switch (block->align) {
 223                 case ALIGN_LEFT:
 224                     render->x_append = padding_width;
 225                     break;
 226                 case ALIGN_RIGHT:
 227                     render->x_offset = padding_width;
 228                     break;
 229                 case ALIGN_CENTER:
 230                     render->x_offset = padding_width / 2;
 231                     render->x_append = padding_width / 2 + padding_width % 2;
 232                     break;
 233             }
 234         }
 235
 236         width += render->width + render->x_offset + render->x_append;
 237
 238         /* If this is not the last block, add some pixels for a separator. */
 239         if (TAILQ_NEXT(block, blocks) != NULL)
 240             width += block->sep_block_width;
 241     }
 242
 243     return width;
 244 }
 245
 246 /*
 247  * Redraws the statusline to the output's statusline_buffer
 248  */
 249 void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
 250     struct status_block *block;
 251
 252     color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 253     draw_util_clear_surface(xcb_connection, &output->statusline_buffer, bar_color);
 254
 255     /* Use unsigned integer wraparound to clip off the left side.
 256      * For example, if clip_left is 75, then x will start at the very large
 257      * number INT_MAX-75, which is way outside the surface dimensions. Drawing
 258      * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
 259      * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
 260      * actually rendering content to the surface. */
 261     uint32_t x = 0 - clip_left;
 262
 263     /* Draw the text of each block */
 264     TAILQ_FOREACH(block, &statusline_head, blocks) {
 265         i3String *text = block->full_text;
 266         struct status_block_render_desc *render = &block->full_render;
 267         if (use_short_text && block->short_text != NULL) {
 268             text = block->short_text;
 269             render = &block->short_render;
 270         }
 271
 272         if (i3string_get_num_bytes(text) == 0)
 273             continue;
 274
 275         color_t fg_color;
 276         if (block->urgent) {
 277             fg_color = colors.urgent_ws_fg;
 278         } else if (block->color) {
 279             fg_color = draw_util_hex_to_color(block->color);
 280         } else if (use_focus_colors) {
 281             fg_color = colors.focus_bar_fg;
 282         } else {
 283             fg_color = colors.bar_fg;
 284         }
 285
 286         color_t bg_color = bar_color;
 287
 288         int border_width = (block->border) ? logical_px(1) : 0;
 289         int full_render_width = render->width + render->x_offset + render->x_append;
 290         if (block->border || block->background || block->urgent) {
 291             /* Let's determine the colors first. */
 292             color_t border_color = bar_color;
 293             if (block->urgent) {
 294                 border_color = colors.urgent_ws_border;
 295                 bg_color = colors.urgent_ws_bg;
 296             } else {
 297                 if (block->border)
 298                     border_color = draw_util_hex_to_color(block->border);
 299                 if (block->background)
 300                     bg_color = draw_util_hex_to_color(block->background);
 301             }
 302
 303             /* Draw the border. */
 304             draw_util_rectangle(xcb_connection, &output->statusline_buffer, border_color,
 305                                 x, logical_px(1),
 306                                 full_render_width,
 307                                 bar_height - logical_px(2));
 308
 309             /* Draw the background. */
 310             draw_util_rectangle(xcb_connection, &output->statusline_buffer, bg_color,
 311                                 x + border_width,
 312                                 logical_px(1) + border_width,
 313                                 full_render_width - 2 * border_width,
 314                                 bar_height - 2 * border_width - logical_px(2));
 315         }
 316
 317         draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
 318                        x + render->x_offset + border_width, logical_px(ws_voff_px),
 319                        render->width - 2 * border_width);
 320         x += full_render_width;
 321
 322         /* If this is not the last block, draw a separator. */
 323         if (TAILQ_NEXT(block, blocks) != NULL) {
 324             x += block->sep_block_width;
 325             draw_separator(output, x, block, use_focus_colors);
 326         }
 327     }
 328 }
 329
 330 /*
 331  * Hides all bars (unmaps them)
 332  *
 333  */
 334 void hide_bars(void) {
 335     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 336         return;
 337     }
 338
 339     i3_output *walk;
 340     SLIST_FOREACH(walk, outputs, slist) {
 341         if (!walk->active) {
 342             continue;
 343         }
 344         xcb_unmap_window(xcb_connection, walk->bar.id);
 345     }
 346     stop_child();
 347 }
 348
 349 /*
 350  * Unhides all bars (maps them)
 351  *
 352  */
 353 void unhide_bars(void) {
 354     if (config.hide_on_modifier != M_HIDE) {
 355         return;
 356     }
 357
 358     i3_output *walk;
 359     xcb_void_cookie_t cookie;
 360     uint32_t mask;
 361     uint32_t values[5];
 362
 363     cont_child();
 364
 365     SLIST_FOREACH(walk, outputs, slist) {
 366         if (walk->bar.id == XCB_NONE) {
 367             continue;
 368         }
 369         mask = XCB_CONFIG_WINDOW_X |
 370                XCB_CONFIG_WINDOW_Y |
 371                XCB_CONFIG_WINDOW_WIDTH |
 372                XCB_CONFIG_WINDOW_HEIGHT |
 373                XCB_CONFIG_WINDOW_STACK_MODE;
 374         values[0] = walk->rect.x;
 375         if (config.position == POS_TOP)
 376             values[1] = walk->rect.y;
 377         else
 378             values[1] = walk->rect.y + walk->rect.h - bar_height;
 379         values[2] = walk->rect.w;
 380         values[3] = bar_height;
 381         values[4] = XCB_STACK_MODE_ABOVE;
 382         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 383         cookie = xcb_configure_window_checked(xcb_connection,
 384                                               walk->bar.id,
 385                                               mask,
 386                                               values);
 387
 388         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 389             exit(EXIT_FAILURE);
 390         }
 391         xcb_map_window(xcb_connection, walk->bar.id);
 392     }
 393 }
 394
 395 /*
 396  * Parse the colors into a format that we can use
 397  *
 398  */
 399 void init_colors(const struct xcb_color_strings_t *new_colors) {
 400 #define PARSE_COLOR(name, def)                                                           \
 401     do {                                                                                 \
 402         colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
 403     } while (0)
 404     PARSE_COLOR(bar_fg, "#FFFFFF");
 405     PARSE_COLOR(bar_bg, "#000000");
 406     PARSE_COLOR(sep_fg, "#666666");
 407     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 408     PARSE_COLOR(active_ws_bg, "#333333");
 409     PARSE_COLOR(active_ws_border, "#333333");
 410     PARSE_COLOR(inactive_ws_fg, "#888888");
 411     PARSE_COLOR(inactive_ws_bg, "#222222");
 412     PARSE_COLOR(inactive_ws_border, "#333333");
 413     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 414     PARSE_COLOR(urgent_ws_bg, "#900000");
 415     PARSE_COLOR(urgent_ws_border, "#2f343a");
 416     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 417     PARSE_COLOR(focus_ws_bg, "#285577");
 418     PARSE_COLOR(focus_ws_border, "#4c7899");
 419 #undef PARSE_COLOR
 420
 421 #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
 422     do {                                                                                             \
 423         colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
 424     } while (0)
 425
 426     /* For the binding mode indicator colors, we don't hardcode a default.
 427      * Instead, we fall back to urgent_ws_* colors. */
 428     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 429     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 430     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 431
 432     /* Similarly, for unspecified focused bar colors, we fall back to the
 433      * regular bar colors. */
 434     PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
 435     PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
 436     PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
 437 #undef PARSE_COLOR_FALLBACK
 438
 439     init_tray_colors();
 440     xcb_flush(xcb_connection);
 441 }
 442
 443 /*
 444  * Handle a button press event (i.e. a mouse click on one of our bars).
 445  * We determine, whether the click occurred on a workspace button or if the scroll-
 446  * wheel was used and change the workspace appropriately
 447  *
 448  */
 449 void handle_button(xcb_button_press_event_t *event) {
 450     /* Determine, which bar was clicked */
 451     i3_output *walk;
 452     xcb_window_t bar = event->event;
 453     SLIST_FOREACH(walk, outputs, slist) {
 454         if (walk->bar.id == bar) {
 455             break;
 456         }
 457     }
 458
 459     if (walk == NULL) {
 460         DLOG("Unknown bar clicked!\n");
 461         return;
 462     }
 463
 464     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 465
 466     DLOG("Got button %d\n", event->detail);
 467
 468     int workspace_width = 0;
 469     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 470
 471     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 472         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 473         if (x >= workspace_width && x <= workspace_width + w)
 474             clicked_ws = ws_walk;
 475         if (ws_walk->visible)
 476             cur_ws = ws_walk;
 477         workspace_width += w;
 478         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 479             workspace_width += logical_px(ws_spacing_px);
 480     }
 481
 482     if (x > workspace_width && child_want_click_events()) {
 483         /* If the child asked for click events,
 484          * check if a status block has been clicked. */
 485         int tray_width = get_tray_width(walk->trayclients);
 486         int block_x = 0, last_block_x;
 487         int offset = walk->rect.w - walk->statusline_width - tray_width - logical_px(sb_hoff_px);
 488         int32_t statusline_x = x - offset;
 489
 490         if (statusline_x >= 0 && statusline_x < walk->statusline_width) {
 491             struct status_block *block;
 492             int sep_offset_remainder = 0;
 493
 494             TAILQ_FOREACH(block, &statusline_head, blocks) {
 495                 i3String *text = block->full_text;
 496                 struct status_block_render_desc *render = &block->full_render;
 497                 if (walk->statusline_short_text && block->short_text != NULL) {
 498                     text = block->short_text;
 499                     render = &block->short_render;
 500                 }
 501
 502                 if (i3string_get_num_bytes(text) == 0)
 503                     continue;
 504
 505                 last_block_x = block_x;
 506                 block_x += render->width + render->x_offset + render->x_append + get_sep_offset(block) + sep_offset_remainder;
 507
 508                 if (statusline_x <= block_x && statusline_x >= last_block_x) {
 509                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 510                     return;
 511                 }
 512
 513                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 514             }
 515         }
 516     }
 517
 518     /* If a custom command was specified for this mouse button, it overrides
 519      * the default behavior. */
 520     binding_t *binding;
 521     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 522         if (binding->input_code != event->detail)
 523             continue;
 524
 525         i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, binding->command);
 526         return;
 527     }
 528
 529     if (cur_ws == NULL) {
 530         DLOG("No workspace active?\n");
 531         return;
 532     }
 533     switch (event->detail) {
 534         case 4:
 535             /* Mouse wheel up. We select the previous ws, if any.
 536              * If there is no more workspace, don’t even send the workspace
 537              * command, otherwise (with workspace auto_back_and_forth) we’d end
 538              * up on the wrong workspace. */
 539             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 540                 return;
 541
 542             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 543             break;
 544         case 5:
 545             /* Mouse wheel down. We select the next ws, if any.
 546              * If there is no more workspace, don’t even send the workspace
 547              * command, otherwise (with workspace auto_back_and_forth) we’d end
 548              * up on the wrong workspace. */
 549             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 550                 return;
 551
 552             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 553             break;
 554         case 1:
 555             cur_ws = clicked_ws;
 556
 557             /* if no workspace was clicked, focus our currently visible
 558              * workspace if it is not already focused */
 559             if (cur_ws == NULL) {
 560                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 561                     if (cur_ws->visible && !cur_ws->focused)
 562                         break;
 563                 }
 564             }
 565
 566             /* if there is nothing to focus, we are done */
 567             if (cur_ws == NULL)
 568                 return;
 569
 570             break;
 571         default:
 572             return;
 573     }
 574
 575     /* To properly handle workspace names with double quotes in them, we need
 576      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 577      * first count the number of double quotes, then we allocate a large enough
 578      * buffer, then we copy character by character. */
 579     int num_quotes = 0;
 580     size_t namelen = 0;
 581     const char *utf8_name = cur_ws->canonical_name;
 582     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 583         if (*walk == '"' || *walk == '\\')
 584             num_quotes++;
 585         /* While we’re looping through the name anyway, we can save one
 586          * strlen(). */
 587         namelen++;
 588     }
 589
 590     const size_t len = namelen + strlen("workspace \"\"") + 1;
 591     char *buffer = scalloc(len + num_quotes, 1);
 592     strncpy(buffer, "workspace \"", strlen("workspace \""));
 593     size_t inpos, outpos;
 594     for (inpos = 0, outpos = strlen("workspace \"");
 595          inpos < namelen;
 596          inpos++, outpos++) {
 597         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 598             buffer[outpos] = '\\';
 599             outpos++;
 600         }
 601         buffer[outpos] = utf8_name[inpos];
 602     }
 603     buffer[outpos] = '"';
 604     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 605     free(buffer);
 606 }
 607
 608 /*
 609  * Handle visibility notifications: when none of the bars are visible, e.g.
 610  * if windows are in fullscreen on each output, suspend the child process.
 611  *
 612  */
 613 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 614     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 615     int num_visible = 0;
 616     i3_output *output;
 617
 618     SLIST_FOREACH(output, outputs, slist) {
 619         if (!output->active) {
 620             continue;
 621         }
 622         if (output->bar.id == event->window) {
 623             if (output->visible == visible) {
 624                 return;
 625             }
 626             output->visible = visible;
 627         }
 628         num_visible += output->visible;
 629     }
 630
 631     if (num_visible == 0) {
 632         stop_child();
 633     } else if (num_visible == visible) {
 634         /* Wake the child only when transitioning from 0 to 1 visible bar.
 635          * We cannot transition from 0 to 2 or more visible bars at once since
 636          * visibility events are delivered to each window separately */
 637         cont_child();
 638     }
 639 }
 640
 641 /*
 642  * Adjusts the size of the tray window and alignment of the tray clients by
 643  * configuring their respective x coordinates. To be called when mapping or
 644  * unmapping a tray client window.
 645  *
 646  */
 647 static void configure_trayclients(void) {
 648     trayclient *trayclient;
 649     i3_output *output;
 650     SLIST_FOREACH(output, outputs, slist) {
 651         if (!output->active)
 652             continue;
 653
 654         int clients = 0;
 655         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 656             if (!trayclient->mapped)
 657                 continue;
 658             clients++;
 659
 660             DLOG("Configuring tray window %08x to x=%d\n",
 661                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 662             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 663             xcb_configure_window(xcb_connection,
 664                                  trayclient->win,
 665                                  XCB_CONFIG_WINDOW_X,
 666                                  &x);
 667         }
 668     }
 669 }
 670
 671 /*
 672  * Handles ClientMessages (messages sent from another client directly to us).
 673  *
 674  * At the moment, only the tray window will receive client messages. All
 675  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 676  *
 677  */
 678 static void handle_client_message(xcb_client_message_event_t *event) {
 679     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 680         event->format == 32) {
 681         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 682         /* event->data.data32[0] is the timestamp */
 683         uint32_t op = event->data.data32[1];
 684         uint32_t mask;
 685         uint32_t values[2];
 686         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 687             xcb_window_t client = event->data.data32[2];
 688
 689             mask = XCB_CW_EVENT_MASK;
 690
 691             /* Needed to get the most recent value of XEMBED_MAPPED. */
 692             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 693             /* Needed for UnmapNotify events. */
 694             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 695             /* Needed because some tray applications (e.g., VLC) use
 696              * override_redirect which causes no ConfigureRequest to be sent. */
 697             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 698
 699             xcb_change_window_attributes(xcb_connection, client, mask, values);
 700
 701             /* Request the _XEMBED_INFO property. The XEMBED specification
 702              * (which is referred by the tray specification) says this *has* to
 703              * be set, but VLC does not set it… */
 704             bool map_it = true;
 705             int xe_version = 1;
 706             xcb_get_property_cookie_t xembedc;
 707             xcb_generic_error_t *error;
 708             xembedc = xcb_get_property(xcb_connection,
 709                                        0,
 710                                        client,
 711                                        atoms[_XEMBED_INFO],
 712                                        XCB_GET_PROPERTY_TYPE_ANY,
 713                                        0,
 714                                        2 * 32);
 715
 716             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 717                                                                        xembedc,
 718                                                                        &error);
 719             if (error != NULL) {
 720                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 721                      error->error_code);
 722                 free(error);
 723                 return;
 724             }
 725             if (xembedr != NULL && xembedr->length != 0) {
 726                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 727                 uint32_t *xembed = xcb_get_property_value(xembedr);
 728                 DLOG("xembed version = %d\n", xembed[0]);
 729                 DLOG("xembed flags = %d\n", xembed[1]);
 730                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 731                 xe_version = xembed[0];
 732                 if (xe_version > 1)
 733                     xe_version = 1;
 734                 free(xembedr);
 735             } else {
 736                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 737             }
 738
 739             DLOG("X window %08x requested docking\n", client);
 740             i3_output *output = NULL;
 741             i3_output *walk = NULL;
 742             tray_output_t *tray_output = NULL;
 743             /* We need to iterate through the tray_output assignments first in
 744              * order to prioritize them. Otherwise, if this bar manages two
 745              * outputs and both are assigned as tray_output as well, the first
 746              * output in our list would receive the tray rather than the first
 747              * one defined via tray_output. */
 748             TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
 749                 SLIST_FOREACH(walk, outputs, slist) {
 750                     if (!walk->active)
 751                         continue;
 752
 753                     if (strcasecmp(walk->name, tray_output->output) == 0) {
 754                         DLOG("Found tray_output assignment for output %s.\n", walk->name);
 755                         output = walk;
 756                         break;
 757                     }
 758
 759                     if (walk->primary && strcasecmp("primary", tray_output->output) == 0) {
 760                         DLOG("Found tray_output assignment on primary output %s.\n", walk->name);
 761                         output = walk;
 762                         break;
 763                     }
 764                 }
 765
 766                 /* If we found an output, we're done. */
 767                 if (output != NULL)
 768                     break;
 769             }
 770
 771             /* If no tray_output has been specified, we fall back to the first
 772              * available output. */
 773             if (output == NULL && TAILQ_EMPTY(&(config.tray_outputs))) {
 774                 SLIST_FOREACH(walk, outputs, slist) {
 775                     if (!walk->active)
 776                         continue;
 777                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 778                     output = walk;
 779                     break;
 780                 }
 781             }
 782
 783             if (output == NULL) {
 784                 ELOG("No output found\n");
 785                 return;
 786             }
 787
 788             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 789                                                             client,
 790                                                             output->bar.id,
 791                                                             output->rect.w - icon_size - logical_px(config.tray_padding),
 792                                                             logical_px(config.tray_padding));
 793             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 794                 return;
 795
 796             /* We reconfigure the window to use a reasonable size. The systray
 797              * specification explicitly says:
 798              *   Tray icons may be assigned any size by the system tray, and
 799              *   should do their best to cope with any size effectively
 800              */
 801             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 802             values[0] = icon_size;
 803             values[1] = icon_size;
 804             xcb_configure_window(xcb_connection,
 805                                  client,
 806                                  mask,
 807                                  values);
 808
 809             /* send the XEMBED_EMBEDDED_NOTIFY message */
 810             void *event = scalloc(32, 1);
 811             xcb_client_message_event_t *ev = event;
 812             ev->response_type = XCB_CLIENT_MESSAGE;
 813             ev->window = client;
 814             ev->type = atoms[_XEMBED];
 815             ev->format = 32;
 816             ev->data.data32[0] = XCB_CURRENT_TIME;
 817             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 818             ev->data.data32[2] = output->bar.id;
 819             ev->data.data32[3] = xe_version;
 820             xcb_send_event(xcb_connection,
 821                            0,
 822                            client,
 823                            XCB_EVENT_MASK_NO_EVENT,
 824                            (char *)ev);
 825             free(event);
 826
 827             /* Put the client inside the save set. Upon termination (whether
 828              * killed or normal exit does not matter) of i3bar, these clients
 829              * will be correctly reparented to their most closest living
 830              * ancestor. Without this, tray icons might die when i3bar
 831              * exits/crashes. */
 832             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 833
 834             trayclient *tc = smalloc(sizeof(trayclient));
 835             tc->win = client;
 836             tc->xe_version = xe_version;
 837             tc->mapped = false;
 838             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 839
 840             if (map_it) {
 841                 DLOG("Mapping dock client\n");
 842                 xcb_map_window(xcb_connection, client);
 843             } else {
 844                 DLOG("Not mapping dock client yet\n");
 845             }
 846             /* Trigger an update to copy the statusline text to the appropriate
 847              * position */
 848             configure_trayclients();
 849             draw_bars(false);
 850         }
 851     }
 852 }
 853
 854 /*
 855  * Handles DestroyNotify events by removing the tray client from the data
 856  * structure. According to the XEmbed protocol, this is one way for a tray
 857  * client to finish the protocol. After this event is received, there is no
 858  * further interaction with the tray client.
 859  *
 860  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 861  *
 862  */
 863 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 864     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 865
 866     i3_output *walk;
 867     SLIST_FOREACH(walk, outputs, slist) {
 868         if (!walk->active)
 869             continue;
 870         DLOG("checking output %s\n", walk->name);
 871         trayclient *trayclient;
 872         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 873             if (trayclient->win != event->window)
 874                 continue;
 875
 876             DLOG("Removing tray client with window ID %08x\n", event->window);
 877             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 878
 879             /* Trigger an update, we now have more space for the statusline */
 880             configure_trayclients();
 881             draw_bars(false);
 882             return;
 883         }
 884     }
 885 }
 886
 887 /*
 888  * Handles MapNotify events. These events happen when a tray client shows its
 889  * window. We respond by realigning the tray clients.
 890  *
 891  */
 892 static void handle_map_notify(xcb_map_notify_event_t *event) {
 893     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 894
 895     i3_output *walk;
 896     SLIST_FOREACH(walk, outputs, slist) {
 897         if (!walk->active)
 898             continue;
 899         DLOG("checking output %s\n", walk->name);
 900         trayclient *trayclient;
 901         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 902             if (trayclient->win != event->window)
 903                 continue;
 904
 905             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 906             trayclient->mapped = true;
 907
 908             /* Trigger an update, we now have more space for the statusline */
 909             configure_trayclients();
 910             draw_bars(false);
 911             return;
 912         }
 913     }
 914 }
 915 /*
 916  * Handles UnmapNotify events. These events happen when a tray client hides its
 917  * window. We respond by realigning the tray clients.
 918  *
 919  */
 920 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 921     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 922
 923     i3_output *walk;
 924     SLIST_FOREACH(walk, outputs, slist) {
 925         if (!walk->active)
 926             continue;
 927         DLOG("checking output %s\n", walk->name);
 928         trayclient *trayclient;
 929         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 930             if (trayclient->win != event->window)
 931                 continue;
 932
 933             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 934             trayclient->mapped = false;
 935
 936             /* Trigger an update, we now have more space for the statusline */
 937             configure_trayclients();
 938             draw_bars(false);
 939             return;
 940         }
 941     }
 942 }
 943
 944 /*
 945  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 946  * handled, which tells us whether a dock client should be mapped or unmapped.
 947  *
 948  */
 949 static void handle_property_notify(xcb_property_notify_event_t *event) {
 950     DLOG("PropertyNotify\n");
 951     if (event->atom == atoms[_XEMBED_INFO] &&
 952         event->state == XCB_PROPERTY_NEW_VALUE) {
 953         DLOG("xembed_info updated\n");
 954         trayclient *trayclient = NULL, *walk;
 955         i3_output *o_walk;
 956         SLIST_FOREACH(o_walk, outputs, slist) {
 957             if (!o_walk->active)
 958                 continue;
 959
 960             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 961                 if (walk->win != event->window)
 962                     continue;
 963                 trayclient = walk;
 964                 break;
 965             }
 966
 967             if (trayclient)
 968                 break;
 969         }
 970         if (!trayclient) {
 971             ELOG("PropertyNotify received for unknown window %08x\n",
 972                  event->window);
 973             return;
 974         }
 975         xcb_get_property_cookie_t xembedc;
 976         xembedc = xcb_get_property_unchecked(xcb_connection,
 977                                              0,
 978                                              trayclient->win,
 979                                              atoms[_XEMBED_INFO],
 980                                              XCB_GET_PROPERTY_TYPE_ANY,
 981                                              0,
 982                                              2 * 32);
 983
 984         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 985                                                                    xembedc,
 986                                                                    NULL);
 987         if (xembedr == NULL || xembedr->length == 0) {
 988             DLOG("xembed_info unset\n");
 989             return;
 990         }
 991
 992         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 993         uint32_t *xembed = xcb_get_property_value(xembedr);
 994         DLOG("xembed version = %d\n", xembed[0]);
 995         DLOG("xembed flags = %d\n", xembed[1]);
 996         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 997         DLOG("map state now %d\n", map_it);
 998         if (trayclient->mapped && !map_it) {
 999             /* need to unmap the window */
1000             xcb_unmap_window(xcb_connection, trayclient->win);
1001         } else if (!trayclient->mapped && map_it) {
1002             /* need to map the window */
1003             xcb_map_window(xcb_connection, trayclient->win);
1004         }
1005         free(xembedr);
1006     }
1007 }
1008
1009 /*
1010  * If a tray client attempts to change its size we deny the request and respond
1011  * by telling it its actual size.
1012  *
1013  */
1014 static void handle_configuration_change(xcb_window_t window) {
1015     trayclient *trayclient;
1016     i3_output *output;
1017     SLIST_FOREACH(output, outputs, slist) {
1018         if (!output->active)
1019             continue;
1020
1021         int clients = 0;
1022         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1023             if (!trayclient->mapped)
1024                 continue;
1025             clients++;
1026
1027             if (trayclient->win != window)
1028                 continue;
1029
1030             xcb_rectangle_t rect;
1031             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1032             rect.y = logical_px(config.tray_padding);
1033             rect.width = icon_size;
1034             rect.height = icon_size;
1035
1036             DLOG("This is a tray window. x = %d\n", rect.x);
1037             fake_configure_notify(xcb_connection, rect, window, 0);
1038             return;
1039         }
1040     }
1041
1042     DLOG("WARNING: Could not find corresponding tray window.\n");
1043 }
1044
1045 static void handle_configure_request(xcb_configure_request_event_t *event) {
1046     DLOG("ConfigureRequest for window = %08x\n", event->window);
1047     handle_configuration_change(event->window);
1048 }
1049
1050 static void handle_resize_request(xcb_resize_request_event_t *event) {
1051     DLOG("ResizeRequest for window = %08x\n", event->window);
1052     handle_configuration_change(event->window);
1053 }
1054
1055 /*
1056  * This function is called immediately before the main loop locks. We flush xcb
1057  * then (and only then)
1058  *
1059  */
1060 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1061     xcb_flush(xcb_connection);
1062 }
1063
1064 /*
1065  * This function is called immediately after the main loop locks, so when one
1066  * of the watchers registered an event.
1067  * We check whether an X-Event arrived and handle it.
1068  *
1069  */
1070 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
1071     xcb_generic_event_t *event;
1072
1073     if (xcb_connection_has_error(xcb_connection)) {
1074         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1075 #ifdef I3_ASAN_ENABLED
1076         __lsan_do_leak_check();
1077 #endif
1078         exit(1);
1079     }
1080
1081     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1082         if (event->response_type == 0) {
1083             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1084             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1085             free(event);
1086             continue;
1087         }
1088
1089         int type = (event->response_type & ~0x80);
1090
1091         if (type == xkb_base && xkb_base > -1) {
1092             DLOG("received an xkb event\n");
1093
1094             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1095             if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1096                 int modstate = state->mods & config.modifier;
1097
1098 #define DLOGMOD(modmask, status)                        \
1099     do {                                                \
1100         switch (modmask) {                              \
1101             case ShiftMask:                             \
1102                 DLOG("ShiftMask got " #status "!\n");   \
1103                 break;                                  \
1104             case ControlMask:                           \
1105                 DLOG("ControlMask got " #status "!\n"); \
1106                 break;                                  \
1107             case Mod1Mask:                              \
1108                 DLOG("Mod1Mask got " #status "!\n");    \
1109                 break;                                  \
1110             case Mod2Mask:                              \
1111                 DLOG("Mod2Mask got " #status "!\n");    \
1112                 break;                                  \
1113             case Mod3Mask:                              \
1114                 DLOG("Mod3Mask got " #status "!\n");    \
1115                 break;                                  \
1116             case Mod4Mask:                              \
1117                 DLOG("Mod4Mask got " #status "!\n");    \
1118                 break;                                  \
1119             case Mod5Mask:                              \
1120                 DLOG("Mod5Mask got " #status "!\n");    \
1121                 break;                                  \
1122         }                                               \
1123     } while (0)
1124
1125                 if (modstate != mod_pressed) {
1126                     if (modstate == 0) {
1127                         DLOGMOD(config.modifier, released);
1128                         if (!activated_mode)
1129                             hide_bars();
1130                     } else {
1131                         DLOGMOD(config.modifier, pressed);
1132                         activated_mode = false;
1133                         unhide_bars();
1134                     }
1135                     mod_pressed = modstate;
1136                 }
1137 #undef DLOGMOD
1138             }
1139
1140             free(event);
1141             continue;
1142         }
1143
1144         switch (type) {
1145             case XCB_VISIBILITY_NOTIFY:
1146                 /* Visibility change: a bar is [un]obscured by other window */
1147                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1148                 break;
1149             case XCB_EXPOSE:
1150                 /* Expose-events happen, when the window needs to be redrawn */
1151                 redraw_bars();
1152                 break;
1153             case XCB_BUTTON_PRESS:
1154                 /* Button press events are mouse buttons clicked on one of our bars */
1155                 handle_button((xcb_button_press_event_t *)event);
1156                 break;
1157             case XCB_CLIENT_MESSAGE:
1158                 /* Client messages are used for client-to-client communication, for
1159                  * example system tray widgets talk to us directly via client messages. */
1160                 handle_client_message((xcb_client_message_event_t *)event);
1161                 break;
1162             case XCB_DESTROY_NOTIFY:
1163                 /* DestroyNotify signifies the end of the XEmbed protocol */
1164                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1165                 break;
1166             case XCB_UNMAP_NOTIFY:
1167                 /* UnmapNotify is received when a tray client hides its window. */
1168                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1169                 break;
1170             case XCB_MAP_NOTIFY:
1171                 handle_map_notify((xcb_map_notify_event_t *)event);
1172                 break;
1173             case XCB_PROPERTY_NOTIFY:
1174                 /* PropertyNotify */
1175                 handle_property_notify((xcb_property_notify_event_t *)event);
1176                 break;
1177             case XCB_CONFIGURE_REQUEST:
1178                 /* ConfigureRequest, sent by a tray child */
1179                 handle_configure_request((xcb_configure_request_event_t *)event);
1180             case XCB_RESIZE_REQUEST:
1181                 /* ResizeRequest sent by a tray child using override_redirect. */
1182                 handle_resize_request((xcb_resize_request_event_t *)event);
1183                 break;
1184         }
1185         free(event);
1186     }
1187 }
1188
1189 /*
1190  * Dummy callback. We only need this, so that the prepare and check watchers
1191  * are triggered
1192  *
1193  */
1194 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1195 }
1196
1197 /*
1198  * Early initialization of the connection to X11: Everything which does not
1199  * depend on 'config'.
1200  *
1201  */
1202 char *init_xcb_early() {
1203     /* FIXME: xcb_connect leaks memory */
1204     xcb_connection = xcb_connect(NULL, &screen);
1205     if (xcb_connection_has_error(xcb_connection)) {
1206         ELOG("Cannot open display\n");
1207         exit(EXIT_FAILURE);
1208     }
1209     conn = xcb_connection;
1210     DLOG("Connected to xcb\n");
1211
1212 /* We have to request the atoms we need */
1213 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1214 #include "xcb_atoms.def"
1215
1216     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1217     xcb_root = root_screen->root;
1218
1219     depth = root_screen->root_depth;
1220     colormap = root_screen->default_colormap;
1221     visual_type = get_visualtype(root_screen);
1222
1223     xcb_cursor_context_t *cursor_ctx;
1224     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1225         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1226         xcb_cursor_context_free(cursor_ctx);
1227     } else {
1228         cursor = xcb_generate_id(xcb_connection);
1229         i3Font cursor_font = load_font("cursor", false);
1230         xcb_create_glyph_cursor(
1231             xcb_connection,
1232             cursor,
1233             cursor_font.specific.xcb.id,
1234             cursor_font.specific.xcb.id,
1235             XCB_CURSOR_LEFT_PTR,
1236             XCB_CURSOR_LEFT_PTR + 1,
1237             0, 0, 0,
1238             65535, 65535, 65535);
1239     }
1240
1241     /* The various watchers to communicate with xcb */
1242     xcb_io = smalloc(sizeof(ev_io));
1243     xcb_prep = smalloc(sizeof(ev_prepare));
1244     xcb_chk = smalloc(sizeof(ev_check));
1245
1246     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1247     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1248     ev_check_init(xcb_chk, &xcb_chk_cb);
1249
1250     ev_io_start(main_loop, xcb_io);
1251     ev_prepare_start(main_loop, xcb_prep);
1252     ev_check_start(main_loop, xcb_chk);
1253
1254     /* Now we get the atoms and save them in a nice data structure */
1255     get_atoms();
1256
1257     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1258
1259     return path;
1260 }
1261
1262 /*
1263  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1264  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1265  * in xcb.
1266  *
1267  */
1268 void register_xkb_keyevents() {
1269     const xcb_query_extension_reply_t *extreply;
1270     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1271     if (!extreply->present) {
1272         ELOG("xkb is not present on this server\n");
1273         exit(EXIT_FAILURE);
1274     }
1275     DLOG("initializing xcb-xkb\n");
1276     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1277     xcb_xkb_select_events(conn,
1278                           XCB_XKB_ID_USE_CORE_KBD,
1279                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1280                           0,
1281                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1282                           0xff,
1283                           0xff,
1284                           NULL);
1285     xkb_base = extreply->first_event;
1286 }
1287
1288 /*
1289  * Deregister from xkb keyevents.
1290  *
1291  */
1292 void deregister_xkb_keyevents() {
1293     xcb_xkb_select_events(conn,
1294                           XCB_XKB_ID_USE_CORE_KBD,
1295                           0,
1296                           0,
1297                           0,
1298                           0xff,
1299                           0xff,
1300                           NULL);
1301 }
1302
1303 /*
1304  * Initialization which depends on 'config' being usable. Called after the
1305  * configuration has arrived.
1306  *
1307  */
1308 void init_xcb_late(char *fontname) {
1309     if (fontname == NULL)
1310         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1311
1312     /* Load the font */
1313     font = load_font(fontname, true);
1314     set_font(&font);
1315     DLOG("Calculated font height: %d\n", font.height);
1316     bar_height = font.height + 2 * logical_px(ws_voff_px);
1317     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1318
1319     if (config.separator_symbol)
1320         separator_symbol_width = predict_text_width(config.separator_symbol);
1321
1322     xcb_flush(xcb_connection);
1323
1324     if (config.hide_on_modifier == M_HIDE)
1325         register_xkb_keyevents();
1326 }
1327
1328 /*
1329  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1330  * selection.
1331  *
1332  */
1333 static void send_tray_clientmessage(void) {
1334     uint8_t buffer[32] = {0};
1335     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1336
1337     ev->response_type = XCB_CLIENT_MESSAGE;
1338     ev->window = xcb_root;
1339     ev->type = atoms[MANAGER];
1340     ev->format = 32;
1341     ev->data.data32[0] = XCB_CURRENT_TIME;
1342     ev->data.data32[1] = tray_reply->atom;
1343     ev->data.data32[2] = selwin;
1344
1345     xcb_send_event(xcb_connection,
1346                    0,
1347                    xcb_root,
1348                    0xFFFFFF,
1349                    (char *)buffer);
1350 }
1351
1352 /*
1353  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1354  * for the X11 display we are running on, then acquiring the selection for this
1355  * atom. Afterwards, tray clients will send ClientMessages to our window.
1356  *
1357  */
1358 void init_tray(void) {
1359     DLOG("Initializing system tray functionality\n");
1360     /* request the tray manager atom for the X11 display we are running on */
1361     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1362     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1363     xcb_intern_atom_cookie_t tray_cookie;
1364     if (tray_reply == NULL)
1365         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1366
1367     /* tray support: we need a window to own the selection */
1368     selwin = xcb_generate_id(xcb_connection);
1369     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1370     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1371     xcb_create_window(xcb_connection,
1372                       depth,
1373                       selwin,
1374                       xcb_root,
1375                       -1, -1,
1376                       1, 1,
1377                       0,
1378                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1379                       visual_type->visual_id,
1380                       selmask,
1381                       selval);
1382
1383     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1384     /* set the atoms */
1385     xcb_change_property(xcb_connection,
1386                         XCB_PROP_MODE_REPLACE,
1387                         selwin,
1388                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1389                         XCB_ATOM_CARDINAL,
1390                         32,
1391                         1,
1392                         &orientation);
1393     xcb_change_property(xcb_connection,
1394                         XCB_PROP_MODE_REPLACE,
1395                         selwin,
1396                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1397                         XCB_ATOM_VISUALID,
1398                         32,
1399                         1,
1400                         &visual_type->visual_id);
1401
1402     init_tray_colors();
1403
1404     if (tray_reply == NULL) {
1405         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1406             ELOG("Could not get atom %s\n", atomname);
1407             exit(EXIT_FAILURE);
1408         }
1409     }
1410
1411     xcb_set_selection_owner(xcb_connection,
1412                             selwin,
1413                             tray_reply->atom,
1414                             XCB_CURRENT_TIME);
1415
1416     /* Verify that we have the selection */
1417     xcb_get_selection_owner_cookie_t selcookie;
1418     xcb_get_selection_owner_reply_t *selreply;
1419
1420     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1421     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1422         ELOG("Could not get selection owner for %s\n", atomname);
1423         exit(EXIT_FAILURE);
1424     }
1425
1426     if (selreply->owner != selwin) {
1427         ELOG("Could not set the %s selection. "
1428              "Maybe another tray is already running?\n",
1429              atomname);
1430         /* NOTE that this error is not fatal. We just can’t provide tray
1431          * functionality */
1432         free(selreply);
1433         return;
1434     }
1435
1436     free(selreply);
1437
1438     send_tray_clientmessage();
1439 }
1440
1441 /*
1442  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1443  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1444  * they assume a light background.
1445  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1446  *
1447  */
1448 void init_tray_colors(void) {
1449     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1450     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1451
1452     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1453
1454     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1455                             {bar_fg[3], bar_fg[4], '\0'},
1456                             {bar_fg[5], bar_fg[6], '\0'}};
1457     const uint8_t r = strtol(strgroups[0], NULL, 16);
1458     const uint8_t g = strtol(strgroups[1], NULL, 16);
1459     const uint8_t b = strtol(strgroups[2], NULL, 16);
1460
1461     const uint16_t r16 = ((uint16_t)r << 8) | r;
1462     const uint16_t g16 = ((uint16_t)g << 8) | g;
1463     const uint16_t b16 = ((uint16_t)b << 8) | b;
1464
1465     const uint32_t tray_colors[12] = {
1466         r16, g16, b16, /* foreground color */
1467         r16, g16, b16, /* error color */
1468         r16, g16, b16, /* warning color */
1469         r16, g16, b16, /* success color */
1470     };
1471
1472     xcb_change_property(xcb_connection,
1473                         XCB_PROP_MODE_REPLACE,
1474                         selwin,
1475                         atoms[_NET_SYSTEM_TRAY_COLORS],
1476                         XCB_ATOM_CARDINAL,
1477                         32,
1478                         12,
1479                         tray_colors);
1480 }
1481
1482 /*
1483  * Cleanup the xcb stuff.
1484  * Called once, before the program terminates.
1485  *
1486  */
1487 void clean_xcb(void) {
1488     i3_output *o_walk;
1489     free_workspaces();
1490     SLIST_FOREACH(o_walk, outputs, slist) {
1491         destroy_window(o_walk);
1492         FREE(o_walk->trayclients);
1493         FREE(o_walk->workspaces);
1494         FREE(o_walk->name);
1495     }
1496     FREE_SLIST(outputs, i3_output);
1497     FREE(outputs);
1498
1499     free_font();
1500
1501     xcb_free_cursor(xcb_connection, cursor);
1502     xcb_flush(xcb_connection);
1503     xcb_aux_sync(xcb_connection);
1504     xcb_disconnect(xcb_connection);
1505
1506     ev_check_stop(main_loop, xcb_chk);
1507     ev_prepare_stop(main_loop, xcb_prep);
1508     ev_io_stop(main_loop, xcb_io);
1509
1510     FREE(xcb_chk);
1511     FREE(xcb_prep);
1512     FREE(xcb_io);
1513 }
1514
1515 /*
1516  * Get the earlier requested atoms and save them in the prepared data structure
1517  *
1518  */
1519 void get_atoms(void) {
1520     xcb_intern_atom_reply_t *reply;
1521 #define ATOM_DO(name)                                                        \
1522     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1523     if (reply == NULL) {                                                     \
1524         ELOG("Could not get atom %s\n", #name);                              \
1525         exit(EXIT_FAILURE);                                                  \
1526     }                                                                        \
1527     atoms[name] = reply->atom;                                               \
1528     free(reply);
1529
1530 #include "xcb_atoms.def"
1531     DLOG("Got atoms\n");
1532 }
1533
1534 /*
1535  * Reparents all tray clients of the specified output to the root window. This
1536  * is either used when shutting down, when an output appears (xrandr --output
1537  * VGA1 --off) or when the primary output changes.
1538  *
1539  * Applications using the tray will start the protocol from the beginning again
1540  * afterwards.
1541  *
1542  */
1543 void kick_tray_clients(i3_output *output) {
1544     if (TAILQ_EMPTY(output->trayclients))
1545         return;
1546
1547     trayclient *trayclient;
1548     while (!TAILQ_EMPTY(output->trayclients)) {
1549         trayclient = TAILQ_FIRST(output->trayclients);
1550         /* Unmap, then reparent (to root) the tray client windows */
1551         xcb_unmap_window(xcb_connection, trayclient->win);
1552         xcb_reparent_window(xcb_connection,
1553                             trayclient->win,
1554                             xcb_root,
1555                             0,
1556                             0);
1557
1558         /* We remove the trayclient right here. We might receive an UnmapNotify
1559          * event afterwards, but better safe than sorry. */
1560         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1561     }
1562
1563     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1564      * We cannot actually destroy the window because then Qt will not restore
1565      * its event mask on the new window. */
1566     uint8_t buffer[32] = {0};
1567     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1568
1569     event->response_type = XCB_DESTROY_NOTIFY;
1570     event->event = selwin;
1571     event->window = selwin;
1572
1573     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1574
1575     send_tray_clientmessage();
1576 }
1577
1578 /*
1579  * Destroy the bar of the specified output
1580  *
1581  */
1582 void destroy_window(i3_output *output) {
1583     if (output == NULL) {
1584         return;
1585     }
1586     if (output->bar.id == XCB_NONE) {
1587         return;
1588     }
1589
1590     kick_tray_clients(output);
1591     xcb_destroy_window(xcb_connection, output->bar.id);
1592     output->bar.id = XCB_NONE;
1593 }
1594
1595 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1596  * by the `position` bar config directive. */
1597 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1598     /* A local struct to save the strut_partial property */
1599     struct {
1600         uint32_t left;
1601         uint32_t right;
1602         uint32_t top;
1603         uint32_t bottom;
1604         uint32_t left_start_y;
1605         uint32_t left_end_y;
1606         uint32_t right_start_y;
1607         uint32_t right_end_y;
1608         uint32_t top_start_x;
1609         uint32_t top_end_x;
1610         uint32_t bottom_start_x;
1611         uint32_t bottom_end_x;
1612     } __attribute__((__packed__)) strut_partial;
1613     memset(&strut_partial, 0, sizeof(strut_partial));
1614
1615     switch (config.position) {
1616         case POS_NONE:
1617             break;
1618         case POS_TOP:
1619             strut_partial.top = bar_height;
1620             strut_partial.top_start_x = output->rect.x;
1621             strut_partial.top_end_x = output->rect.x + output->rect.w;
1622             break;
1623         case POS_BOT:
1624             strut_partial.bottom = bar_height;
1625             strut_partial.bottom_start_x = output->rect.x;
1626             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1627             break;
1628     }
1629     return xcb_change_property(xcb_connection,
1630                                XCB_PROP_MODE_REPLACE,
1631                                output->bar.id,
1632                                atoms[_NET_WM_STRUT_PARTIAL],
1633                                XCB_ATOM_CARDINAL,
1634                                32,
1635                                12,
1636                                &strut_partial);
1637 }
1638
1639 /*
1640  * Reconfigure all bars and create new bars for recently activated outputs
1641  *
1642  */
1643 void reconfig_windows(bool redraw_bars) {
1644     uint32_t mask;
1645     uint32_t values[6];
1646     static bool tray_configured = false;
1647
1648     i3_output *walk;
1649     SLIST_FOREACH(walk, outputs, slist) {
1650         if (!walk->active) {
1651             /* If an output is not active, we destroy its bar */
1652             /* FIXME: Maybe we rather want to unmap? */
1653             DLOG("Destroying window for output %s\n", walk->name);
1654             destroy_window(walk);
1655             continue;
1656         }
1657         if (walk->bar.id == XCB_NONE) {
1658             DLOG("Creating window for output %s\n", walk->name);
1659
1660             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1661             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1662             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1663             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1664
1665             values[0] = colors.bar_bg.colorpixel;
1666             values[1] = root_screen->black_pixel;
1667             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1668             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1669             /* We enable the following EventMask fields:
1670              * EXPOSURE, to get expose events (we have to re-draw then)
1671              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1672              *                        child windows use ConfigureWindow
1673              * BUTTON_PRESS, to handle clicks on the workspace buttons
1674              * */
1675             values[3] = XCB_EVENT_MASK_EXPOSURE |
1676                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1677                         XCB_EVENT_MASK_BUTTON_PRESS;
1678             if (config.hide_on_modifier == M_DOCK) {
1679                 /* If the bar is normally visible, catch visibility change events to suspend
1680                  * the status process when the bar is obscured by full-screened windows.  */
1681                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1682                 walk->visible = true;
1683             }
1684             values[4] = colormap;
1685             values[5] = cursor;
1686
1687             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1688                                                                      depth,
1689                                                                      bar_id,
1690                                                                      xcb_root,
1691                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1692                                                                      walk->rect.w, bar_height,
1693                                                                      0,
1694                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1695                                                                      visual_type->visual_id,
1696                                                                      mask,
1697                                                                      values);
1698
1699             /* The double-buffer we use to render stuff off-screen */
1700             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1701                                                                     depth,
1702                                                                     buffer_id,
1703                                                                     bar_id,
1704                                                                     walk->rect.w,
1705                                                                     bar_height);
1706
1707             /* The double-buffer we use to render the statusline before copying to buffer */
1708             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1709                                                                       depth,
1710                                                                       statusline_buffer_id,
1711                                                                       bar_id,
1712                                                                       walk->rect.w,
1713                                                                       bar_height);
1714
1715             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1716             xcb_void_cookie_t class_cookie;
1717             class_cookie = xcb_change_property(xcb_connection,
1718                                                XCB_PROP_MODE_REPLACE,
1719                                                bar_id,
1720                                                XCB_ATOM_WM_CLASS,
1721                                                XCB_ATOM_STRING,
1722                                                8,
1723                                                (strlen("i3bar") + 1) * 2,
1724                                                "i3bar\0i3bar\0");
1725
1726             char *name;
1727             sasprintf(&name, "i3bar for output %s", walk->name);
1728             xcb_void_cookie_t name_cookie;
1729             name_cookie = xcb_change_property(xcb_connection,
1730                                               XCB_PROP_MODE_REPLACE,
1731                                               bar_id,
1732                                               XCB_ATOM_WM_NAME,
1733                                               XCB_ATOM_STRING,
1734                                               8,
1735                                               strlen(name),
1736                                               name);
1737             free(name);
1738
1739             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1740              * this one */
1741             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1742                                                                 XCB_PROP_MODE_REPLACE,
1743                                                                 bar_id,
1744                                                                 atoms[_NET_WM_WINDOW_TYPE],
1745                                                                 XCB_ATOM_ATOM,
1746                                                                 32,
1747                                                                 1,
1748                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1749
1750             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1751             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1752             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1753
1754             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1755
1756             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1757             xcb_void_cookie_t map_cookie;
1758             if (config.hide_on_modifier == M_DOCK) {
1759                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1760             }
1761
1762             if (xcb_request_failed(win_cookie, "Could not create window") ||
1763                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1764                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1765                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1766                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1767                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1768                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1769                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1770                 exit(EXIT_FAILURE);
1771             }
1772
1773             /* Unless "tray_output none" was specified, we need to initialize the tray. */
1774             bool no_tray = false;
1775             if (!(TAILQ_EMPTY(&(config.tray_outputs)))) {
1776                 no_tray = strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0;
1777             }
1778
1779             /*
1780              * There are three scenarios in which we need to initialize the tray:
1781              *   1. A specific output was listed in tray_outputs which is also
1782              *      in the list of outputs managed by this bar.
1783              *   2. No tray_output directive was specified. In this case, we
1784              *      use the first available output.
1785              *   3. 'tray_output primary' was specified. In this case we use the
1786              *      primary output.
1787              *
1788              * Three scenarios in which we specifically don't want to
1789              * initialize the tray are:
1790              *   1. 'tray_output none' was specified.
1791              *   2. A specific output was listed as a tray_output, but is not
1792              *      one of the outputs managed by this bar. For example, consider
1793              *      tray_outputs == [VGA-1], but outputs == [HDMI-1].
1794              *   3. 'tray_output primary' was specified and no output in the list
1795              *      is primary.
1796              */
1797             if (!tray_configured && !no_tray) {
1798                 /* If no tray_output was specified, we go ahead and initialize the tray as
1799                  * we will be using the first available output. */
1800                 if (TAILQ_EMPTY(&(config.tray_outputs))) {
1801                     init_tray();
1802                 }
1803
1804                 /* If one or more tray_output assignments were specified, we ensure that at least one of
1805                  * them is actually an output managed by this instance. */
1806                 tray_output_t *tray_output;
1807                 TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1808                     i3_output *output;
1809                     bool found = false;
1810                     SLIST_FOREACH(output, outputs, slist) {
1811                         if (strcasecmp(output->name, tray_output->output) == 0 ||
1812                             (strcasecmp(tray_output->output, "primary") == 0 && output->primary)) {
1813                             found = true;
1814                             init_tray();
1815                             break;
1816                         }
1817                     }
1818
1819                     if (found)
1820                         break;
1821                 }
1822
1823                 tray_configured = true;
1824             }
1825         } else {
1826             /* We already have a bar, so we just reconfigure it */
1827             mask = XCB_CONFIG_WINDOW_X |
1828                    XCB_CONFIG_WINDOW_Y |
1829                    XCB_CONFIG_WINDOW_WIDTH |
1830                    XCB_CONFIG_WINDOW_HEIGHT |
1831                    XCB_CONFIG_WINDOW_STACK_MODE;
1832             values[0] = walk->rect.x;
1833             if (config.position == POS_TOP)
1834                 values[1] = walk->rect.y;
1835             else
1836                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1837             values[2] = walk->rect.w;
1838             values[3] = bar_height;
1839             values[4] = XCB_STACK_MODE_ABOVE;
1840
1841             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1842             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1843
1844             DLOG("Destroying buffer for output %s\n", walk->name);
1845             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1846
1847             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1848             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1849
1850             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1851             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1852                                                                         walk->bar.id,
1853                                                                         mask,
1854                                                                         values);
1855
1856             mask = XCB_CW_OVERRIDE_REDIRECT;
1857             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1858             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1859             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1860                                                                         walk->bar.id,
1861                                                                         mask,
1862                                                                         values);
1863
1864             DLOG("Recreating buffer for output %s\n", walk->name);
1865             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1866                                                                     depth,
1867                                                                     walk->buffer.id,
1868                                                                     walk->bar.id,
1869                                                                     walk->rect.w,
1870                                                                     bar_height);
1871
1872             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1873             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1874                                                                       depth,
1875                                                                       walk->statusline_buffer.id,
1876                                                                       walk->bar.id,
1877                                                                       walk->rect.w,
1878                                                                       bar_height);
1879
1880             draw_util_surface_free(xcb_connection, &(walk->bar));
1881             draw_util_surface_free(xcb_connection, &(walk->buffer));
1882             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1883             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1884             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1885             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1886
1887             xcb_void_cookie_t map_cookie, umap_cookie;
1888             if (redraw_bars) {
1889                 /* Unmap the window, and draw it again when in dock mode */
1890                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1891                 if (config.hide_on_modifier == M_DOCK) {
1892                     cont_child();
1893                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1894                 } else {
1895                     stop_child();
1896                 }
1897
1898                 if (config.hide_on_modifier == M_HIDE) {
1899                     /* Switching to hide mode, register for keyevents */
1900                     register_xkb_keyevents();
1901                 } else {
1902                     /* Switching to dock/invisible mode, deregister from keyevents */
1903                     deregister_xkb_keyevents();
1904                 }
1905             }
1906
1907             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1908                 xcb_request_failed(chg_cookie, "Could not change window") ||
1909                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1910                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1911                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1912                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1913                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1914                 exit(EXIT_FAILURE);
1915             }
1916         }
1917     }
1918 }
1919
1920 /*
1921  * Render the bars, with buttons and statusline
1922  *
1923  */
1924 void draw_bars(bool unhide) {
1925     DLOG("Drawing bars...\n");
1926
1927     uint32_t full_statusline_width = predict_statusline_length(false);
1928     uint32_t short_statusline_width = predict_statusline_length(true);
1929
1930     i3_output *outputs_walk;
1931     SLIST_FOREACH(outputs_walk, outputs, slist) {
1932         int workspace_width = 0;
1933
1934         if (!outputs_walk->active) {
1935             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1936             continue;
1937         }
1938         if (outputs_walk->bar.id == XCB_NONE) {
1939             /* Oh shit, an active output without an own bar. Create it now! */
1940             reconfig_windows(false);
1941         }
1942
1943         bool use_focus_colors = output_has_focus(outputs_walk);
1944
1945         /* First things first: clear the backbuffer */
1946         draw_util_clear_surface(xcb_connection, &(outputs_walk->buffer),
1947                                 (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1948
1949         if (!config.disable_ws) {
1950             i3_ws *ws_walk;
1951             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1952                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1953                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1954                 color_t fg_color = colors.inactive_ws_fg;
1955                 color_t bg_color = colors.inactive_ws_bg;
1956                 color_t border_color = colors.inactive_ws_border;
1957                 if (ws_walk->visible) {
1958                     if (!ws_walk->focused) {
1959                         fg_color = colors.active_ws_fg;
1960                         bg_color = colors.active_ws_bg;
1961                         border_color = colors.active_ws_border;
1962                     } else {
1963                         fg_color = colors.focus_ws_fg;
1964                         bg_color = colors.focus_ws_bg;
1965                         border_color = colors.focus_ws_border;
1966                     }
1967                 }
1968                 if (ws_walk->urgent) {
1969                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1970                     fg_color = colors.urgent_ws_fg;
1971                     bg_color = colors.urgent_ws_bg;
1972                     border_color = colors.urgent_ws_border;
1973                     unhide = true;
1974                 }
1975
1976                 /* Draw the border of the button. */
1977                 draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), border_color,
1978                                     workspace_width,
1979                                     logical_px(1),
1980                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1981                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1982
1983                 /* Draw the inside of the button. */
1984                 draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), bg_color,
1985                                     workspace_width + logical_px(1),
1986                                     2 * logical_px(1),
1987                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1988                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1989
1990                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
1991                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1992                                logical_px(ws_voff_px),
1993                                ws_walk->name_width);
1994
1995                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1996                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1997                     workspace_width += logical_px(ws_spacing_px);
1998             }
1999         }
2000
2001         if (binding.name && !config.disable_binding_mode_indicator) {
2002             workspace_width += logical_px(ws_spacing_px);
2003
2004             color_t fg_color = colors.binding_mode_fg;
2005             color_t bg_color = colors.binding_mode_bg;
2006
2007             draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), colors.binding_mode_border,
2008                                 workspace_width,
2009                                 logical_px(1),
2010                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
2011                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
2012
2013             draw_util_rectangle(xcb_connection, &(outputs_walk->buffer), bg_color,
2014                                 workspace_width + logical_px(1),
2015                                 2 * logical_px(1),
2016                                 binding.width + 2 * logical_px(ws_hoff_px),
2017                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
2018
2019             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
2020                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2021                            logical_px(ws_voff_px),
2022                            binding.width);
2023
2024             unhide = true;
2025             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
2026         }
2027
2028         if (!TAILQ_EMPTY(&statusline_head)) {
2029             DLOG("Printing statusline!\n");
2030
2031             int tray_width = get_tray_width(outputs_walk->trayclients);
2032             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
2033             uint32_t clip_left = 0;
2034             uint32_t statusline_width = full_statusline_width;
2035             bool use_short_text = false;
2036
2037             if (statusline_width > max_statusline_width) {
2038                 statusline_width = short_statusline_width;
2039                 use_short_text = true;
2040                 if (statusline_width > max_statusline_width) {
2041                     clip_left = statusline_width - max_statusline_width;
2042                 }
2043             }
2044
2045             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
2046             int x_dest = outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width;
2047
2048             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
2049             draw_util_copy_surface(xcb_connection, &outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2050                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2051
2052             outputs_walk->statusline_width = statusline_width;
2053             outputs_walk->statusline_short_text = use_short_text;
2054         }
2055     }
2056
2057     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2058     if (mod_pressed ||
2059         config.hidden_state == S_SHOW ||
2060         unhide) {
2061         unhide_bars();
2062     } else if (config.hide_on_modifier == M_HIDE) {
2063         hide_bars();
2064     }
2065
2066     redraw_bars();
2067 }
2068
2069 /*
2070  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2071  *
2072  */
2073 void redraw_bars(void) {
2074     i3_output *outputs_walk;
2075     SLIST_FOREACH(outputs_walk, outputs, slist) {
2076         if (!outputs_walk->active) {
2077             continue;
2078         }
2079
2080         draw_util_copy_surface(xcb_connection, &(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2081                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2082         xcb_flush(xcb_connection);
2083     }
2084 }
2085
2086 /*
2087  * Set the current binding mode
2088  *
2089  */
2090 void set_current_mode(struct mode *current) {
2091     I3STRING_FREE(binding.name);
2092     binding = *current;
2093     activated_mode = binding.name != NULL;
2094     return;
2095 }