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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(&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(&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(&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(&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_RUN_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 XCB_BUTTON_SCROLL_UP:
 535         case XCB_BUTTON_SCROLL_LEFT:
 536             /* Mouse wheel up. We select the previous ws, if any.
 537              * If there is no more workspace, don’t even send the workspace
 538              * command, otherwise (with workspace auto_back_and_forth) we’d end
 539              * up on the wrong workspace. */
 540             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 541                 return;
 542
 543             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 544             break;
 545         case XCB_BUTTON_SCROLL_DOWN:
 546         case XCB_BUTTON_SCROLL_RIGHT:
 547             /* Mouse wheel down. We select the next ws, if any.
 548              * If there is no more workspace, don’t even send the workspace
 549              * command, otherwise (with workspace auto_back_and_forth) we’d end
 550              * up on the wrong workspace. */
 551             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 552                 return;
 553
 554             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 555             break;
 556         case 1:
 557             cur_ws = clicked_ws;
 558
 559             /* if no workspace was clicked, focus our currently visible
 560              * workspace if it is not already focused */
 561             if (cur_ws == NULL) {
 562                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 563                     if (cur_ws->visible && !cur_ws->focused)
 564                         break;
 565                 }
 566             }
 567
 568             /* if there is nothing to focus, we are done */
 569             if (cur_ws == NULL)
 570                 return;
 571
 572             break;
 573         default:
 574             return;
 575     }
 576
 577     /* To properly handle workspace names with double quotes in them, we need
 578      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 579      * first count the number of double quotes, then we allocate a large enough
 580      * buffer, then we copy character by character. */
 581     int num_quotes = 0;
 582     size_t namelen = 0;
 583     const char *utf8_name = cur_ws->canonical_name;
 584     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 585         if (*walk == '"' || *walk == '\\')
 586             num_quotes++;
 587         /* While we’re looping through the name anyway, we can save one
 588          * strlen(). */
 589         namelen++;
 590     }
 591
 592     const size_t len = namelen + strlen("workspace \"\"") + 1;
 593     char *buffer = scalloc(len + num_quotes, 1);
 594     strncpy(buffer, "workspace \"", strlen("workspace \""));
 595     size_t inpos, outpos;
 596     for (inpos = 0, outpos = strlen("workspace \"");
 597          inpos < namelen;
 598          inpos++, outpos++) {
 599         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 600             buffer[outpos] = '\\';
 601             outpos++;
 602         }
 603         buffer[outpos] = utf8_name[inpos];
 604     }
 605     buffer[outpos] = '"';
 606     i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
 607     free(buffer);
 608 }
 609
 610 /*
 611  * Handle visibility notifications: when none of the bars are visible, e.g.
 612  * if windows are in fullscreen on each output, suspend the child process.
 613  *
 614  */
 615 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 616     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 617     int num_visible = 0;
 618     i3_output *output;
 619
 620     SLIST_FOREACH(output, outputs, slist) {
 621         if (!output->active) {
 622             continue;
 623         }
 624         if (output->bar.id == event->window) {
 625             if (output->visible == visible) {
 626                 return;
 627             }
 628             output->visible = visible;
 629         }
 630         num_visible += output->visible;
 631     }
 632
 633     if (num_visible == 0) {
 634         stop_child();
 635     } else if (num_visible == visible) {
 636         /* Wake the child only when transitioning from 0 to 1 visible bar.
 637          * We cannot transition from 0 to 2 or more visible bars at once since
 638          * visibility events are delivered to each window separately */
 639         cont_child();
 640     }
 641 }
 642
 643 /*
 644  * Adjusts the size of the tray window and alignment of the tray clients by
 645  * configuring their respective x coordinates. To be called when mapping or
 646  * unmapping a tray client window.
 647  *
 648  */
 649 static void configure_trayclients(void) {
 650     trayclient *trayclient;
 651     i3_output *output;
 652     SLIST_FOREACH(output, outputs, slist) {
 653         if (!output->active)
 654             continue;
 655
 656         int clients = 0;
 657         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 658             if (!trayclient->mapped)
 659                 continue;
 660             clients++;
 661
 662             DLOG("Configuring tray window %08x to x=%d\n",
 663                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 664             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 665             xcb_configure_window(xcb_connection,
 666                                  trayclient->win,
 667                                  XCB_CONFIG_WINDOW_X,
 668                                  &x);
 669         }
 670     }
 671 }
 672
 673 /*
 674  * Handles ClientMessages (messages sent from another client directly to us).
 675  *
 676  * At the moment, only the tray window will receive client messages. All
 677  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 678  *
 679  */
 680 static void handle_client_message(xcb_client_message_event_t *event) {
 681     if (event->type == atoms[I3_SYNC]) {
 682         xcb_window_t window = event->data.data32[0];
 683         uint32_t rnd = event->data.data32[1];
 684         DLOG("[i3 sync protocol] Forwarding random value %d, X11 window 0x%08x to i3\n", rnd, window);
 685
 686         void *reply = scalloc(32, 1);
 687         xcb_client_message_event_t *ev = reply;
 688
 689         ev->response_type = XCB_CLIENT_MESSAGE;
 690         ev->window = window;
 691         ev->type = atoms[I3_SYNC];
 692         ev->format = 32;
 693         ev->data.data32[0] = window;
 694         ev->data.data32[1] = rnd;
 695
 696         xcb_send_event(conn, false, xcb_root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char *)ev);
 697         xcb_flush(conn);
 698         free(reply);
 699     } else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 700                event->format == 32) {
 701         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 702         /* event->data.data32[0] is the timestamp */
 703         uint32_t op = event->data.data32[1];
 704         uint32_t mask;
 705         uint32_t values[2];
 706         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 707             xcb_window_t client = event->data.data32[2];
 708
 709             mask = XCB_CW_EVENT_MASK;
 710
 711             /* Needed to get the most recent value of XEMBED_MAPPED. */
 712             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 713             /* Needed for UnmapNotify events. */
 714             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 715             /* Needed because some tray applications (e.g., VLC) use
 716              * override_redirect which causes no ConfigureRequest to be sent. */
 717             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 718
 719             xcb_change_window_attributes(xcb_connection, client, mask, values);
 720
 721             /* Request the _XEMBED_INFO property. The XEMBED specification
 722              * (which is referred by the tray specification) says this *has* to
 723              * be set, but VLC does not set it… */
 724             bool map_it = true;
 725             int xe_version = 1;
 726             xcb_get_property_cookie_t xembedc;
 727             xcb_generic_error_t *error;
 728             xembedc = xcb_get_property(xcb_connection,
 729                                        0,
 730                                        client,
 731                                        atoms[_XEMBED_INFO],
 732                                        XCB_GET_PROPERTY_TYPE_ANY,
 733                                        0,
 734                                        2 * 32);
 735
 736             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 737                                                                        xembedc,
 738                                                                        &error);
 739             if (error != NULL) {
 740                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 741                      error->error_code);
 742                 free(error);
 743                 return;
 744             }
 745             if (xembedr != NULL && xembedr->length != 0) {
 746                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 747                 uint32_t *xembed = xcb_get_property_value(xembedr);
 748                 DLOG("xembed version = %d\n", xembed[0]);
 749                 DLOG("xembed flags = %d\n", xembed[1]);
 750                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 751                 xe_version = xembed[0];
 752                 if (xe_version > 1)
 753                     xe_version = 1;
 754                 free(xembedr);
 755             } else {
 756                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 757             }
 758
 759             DLOG("X window %08x requested docking\n", client);
 760             i3_output *output = NULL;
 761             i3_output *walk = NULL;
 762             tray_output_t *tray_output = NULL;
 763             /* We need to iterate through the tray_output assignments first in
 764              * order to prioritize them. Otherwise, if this bar manages two
 765              * outputs and both are assigned as tray_output as well, the first
 766              * output in our list would receive the tray rather than the first
 767              * one defined via tray_output. */
 768             TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
 769                 SLIST_FOREACH(walk, outputs, slist) {
 770                     if (!walk->active)
 771                         continue;
 772
 773                     if (strcasecmp(walk->name, tray_output->output) == 0) {
 774                         DLOG("Found tray_output assignment for output %s.\n", walk->name);
 775                         output = walk;
 776                         break;
 777                     }
 778
 779                     if (walk->primary && strcasecmp("primary", tray_output->output) == 0) {
 780                         DLOG("Found tray_output assignment on primary output %s.\n", walk->name);
 781                         output = walk;
 782                         break;
 783                     }
 784                 }
 785
 786                 /* If we found an output, we're done. */
 787                 if (output != NULL)
 788                     break;
 789             }
 790
 791             /* If no tray_output has been specified, we fall back to the first
 792              * available output. */
 793             if (output == NULL && TAILQ_EMPTY(&(config.tray_outputs))) {
 794                 SLIST_FOREACH(walk, outputs, slist) {
 795                     if (!walk->active)
 796                         continue;
 797                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 798                     output = walk;
 799                     break;
 800                 }
 801             }
 802
 803             if (output == NULL) {
 804                 ELOG("No output found\n");
 805                 return;
 806             }
 807
 808             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 809                                                             client,
 810                                                             output->bar.id,
 811                                                             output->rect.w - icon_size - logical_px(config.tray_padding),
 812                                                             logical_px(config.tray_padding));
 813             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 814                 return;
 815
 816             /* We reconfigure the window to use a reasonable size. The systray
 817              * specification explicitly says:
 818              *   Tray icons may be assigned any size by the system tray, and
 819              *   should do their best to cope with any size effectively
 820              */
 821             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 822             values[0] = icon_size;
 823             values[1] = icon_size;
 824             xcb_configure_window(xcb_connection,
 825                                  client,
 826                                  mask,
 827                                  values);
 828
 829             /* send the XEMBED_EMBEDDED_NOTIFY message */
 830             void *event = scalloc(32, 1);
 831             xcb_client_message_event_t *ev = event;
 832             ev->response_type = XCB_CLIENT_MESSAGE;
 833             ev->window = client;
 834             ev->type = atoms[_XEMBED];
 835             ev->format = 32;
 836             ev->data.data32[0] = XCB_CURRENT_TIME;
 837             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 838             ev->data.data32[2] = output->bar.id;
 839             ev->data.data32[3] = xe_version;
 840             xcb_send_event(xcb_connection,
 841                            0,
 842                            client,
 843                            XCB_EVENT_MASK_NO_EVENT,
 844                            (char *)ev);
 845             free(event);
 846
 847             /* Put the client inside the save set. Upon termination (whether
 848              * killed or normal exit does not matter) of i3bar, these clients
 849              * will be correctly reparented to their most closest living
 850              * ancestor. Without this, tray icons might die when i3bar
 851              * exits/crashes. */
 852             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 853
 854             trayclient *tc = smalloc(sizeof(trayclient));
 855             tc->win = client;
 856             tc->xe_version = xe_version;
 857             tc->mapped = false;
 858             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 859
 860             if (map_it) {
 861                 DLOG("Mapping dock client\n");
 862                 xcb_map_window(xcb_connection, client);
 863             } else {
 864                 DLOG("Not mapping dock client yet\n");
 865             }
 866             /* Trigger an update to copy the statusline text to the appropriate
 867              * position */
 868             configure_trayclients();
 869             draw_bars(false);
 870         }
 871     }
 872 }
 873
 874 /*
 875  * Handles DestroyNotify events by removing the tray client from the data
 876  * structure. According to the XEmbed protocol, this is one way for a tray
 877  * client to finish the protocol. After this event is received, there is no
 878  * further interaction with the tray client.
 879  *
 880  * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 881  *
 882  */
 883 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 884     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 885
 886     i3_output *walk;
 887     SLIST_FOREACH(walk, outputs, slist) {
 888         if (!walk->active)
 889             continue;
 890         DLOG("checking output %s\n", walk->name);
 891         trayclient *trayclient;
 892         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 893             if (trayclient->win != event->window) {
 894                 continue;
 895             }
 896
 897             DLOG("Removing tray client with window ID %08x\n", event->window);
 898             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 899             FREE(trayclient);
 900
 901             /* Trigger an update, we now have more space for the statusline */
 902             configure_trayclients();
 903             draw_bars(false);
 904             return;
 905         }
 906     }
 907 }
 908
 909 /*
 910  * Handles MapNotify events. These events happen when a tray client shows its
 911  * window. We respond by realigning the tray clients.
 912  *
 913  */
 914 static void handle_map_notify(xcb_map_notify_event_t *event) {
 915     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 916
 917     i3_output *walk;
 918     SLIST_FOREACH(walk, outputs, slist) {
 919         if (!walk->active)
 920             continue;
 921         DLOG("checking output %s\n", walk->name);
 922         trayclient *trayclient;
 923         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 924             if (trayclient->win != event->window)
 925                 continue;
 926
 927             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 928             trayclient->mapped = true;
 929
 930             /* Trigger an update, we now have more space for the statusline */
 931             configure_trayclients();
 932             draw_bars(false);
 933             return;
 934         }
 935     }
 936 }
 937 /*
 938  * Handles UnmapNotify events. These events happen when a tray client hides its
 939  * window. We respond by realigning the tray clients.
 940  *
 941  */
 942 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 943     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 944
 945     i3_output *walk;
 946     SLIST_FOREACH(walk, outputs, slist) {
 947         if (!walk->active)
 948             continue;
 949         DLOG("checking output %s\n", walk->name);
 950         trayclient *trayclient;
 951         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 952             if (trayclient->win != event->window)
 953                 continue;
 954
 955             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 956             trayclient->mapped = false;
 957
 958             /* Trigger an update, we now have more space for the statusline */
 959             configure_trayclients();
 960             draw_bars(false);
 961             return;
 962         }
 963     }
 964 }
 965
 966 /*
 967  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 968  * handled, which tells us whether a dock client should be mapped or unmapped.
 969  *
 970  */
 971 static void handle_property_notify(xcb_property_notify_event_t *event) {
 972     DLOG("PropertyNotify\n");
 973     if (event->atom == atoms[_XEMBED_INFO] &&
 974         event->state == XCB_PROPERTY_NEW_VALUE) {
 975         DLOG("xembed_info updated\n");
 976         trayclient *trayclient = NULL, *walk;
 977         i3_output *o_walk;
 978         SLIST_FOREACH(o_walk, outputs, slist) {
 979             if (!o_walk->active)
 980                 continue;
 981
 982             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 983                 if (walk->win != event->window)
 984                     continue;
 985                 trayclient = walk;
 986                 break;
 987             }
 988
 989             if (trayclient)
 990                 break;
 991         }
 992         if (!trayclient) {
 993             ELOG("PropertyNotify received for unknown window %08x\n",
 994                  event->window);
 995             return;
 996         }
 997         xcb_get_property_cookie_t xembedc;
 998         xembedc = xcb_get_property_unchecked(xcb_connection,
 999                                              0,
1000                                              trayclient->win,
1001                                              atoms[_XEMBED_INFO],
1002                                              XCB_GET_PROPERTY_TYPE_ANY,
1003                                              0,
1004                                              2 * 32);
1005
1006         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
1007                                                                    xembedc,
1008                                                                    NULL);
1009         if (xembedr == NULL || xembedr->length == 0) {
1010             DLOG("xembed_info unset\n");
1011             return;
1012         }
1013
1014         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
1015         uint32_t *xembed = xcb_get_property_value(xembedr);
1016         DLOG("xembed version = %d\n", xembed[0]);
1017         DLOG("xembed flags = %d\n", xembed[1]);
1018         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
1019         DLOG("map state now %d\n", map_it);
1020         if (trayclient->mapped && !map_it) {
1021             /* need to unmap the window */
1022             xcb_unmap_window(xcb_connection, trayclient->win);
1023         } else if (!trayclient->mapped && map_it) {
1024             /* need to map the window */
1025             xcb_map_window(xcb_connection, trayclient->win);
1026         }
1027         free(xembedr);
1028     }
1029 }
1030
1031 /*
1032  * If a tray client attempts to change its size we deny the request and respond
1033  * by telling it its actual size.
1034  *
1035  */
1036 static void handle_configuration_change(xcb_window_t window) {
1037     trayclient *trayclient;
1038     i3_output *output;
1039     SLIST_FOREACH(output, outputs, slist) {
1040         if (!output->active)
1041             continue;
1042
1043         int clients = 0;
1044         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1045             if (!trayclient->mapped)
1046                 continue;
1047             clients++;
1048
1049             if (trayclient->win != window)
1050                 continue;
1051
1052             xcb_rectangle_t rect;
1053             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1054             rect.y = logical_px(config.tray_padding);
1055             rect.width = icon_size;
1056             rect.height = icon_size;
1057
1058             DLOG("This is a tray window. x = %d\n", rect.x);
1059             fake_configure_notify(xcb_connection, rect, window, 0);
1060             return;
1061         }
1062     }
1063
1064     DLOG("WARNING: Could not find corresponding tray window.\n");
1065 }
1066
1067 static void handle_configure_request(xcb_configure_request_event_t *event) {
1068     DLOG("ConfigureRequest for window = %08x\n", event->window);
1069     handle_configuration_change(event->window);
1070 }
1071
1072 static void handle_resize_request(xcb_resize_request_event_t *event) {
1073     DLOG("ResizeRequest for window = %08x\n", event->window);
1074     handle_configuration_change(event->window);
1075 }
1076
1077 /*
1078  * This function is called immediately before the main loop locks. We flush xcb
1079  * then (and only then)
1080  *
1081  */
1082 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1083     xcb_flush(xcb_connection);
1084 }
1085
1086 /*
1087  * This function is called immediately after the main loop locks, so when one
1088  * of the watchers registered an event.
1089  * We check whether an X-Event arrived and handle it.
1090  *
1091  */
1092 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
1093     xcb_generic_event_t *event;
1094
1095     if (xcb_connection_has_error(xcb_connection)) {
1096         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1097 #ifdef I3_ASAN_ENABLED
1098         __lsan_do_leak_check();
1099 #endif
1100         exit(1);
1101     }
1102
1103     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1104         if (event->response_type == 0) {
1105             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1106             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1107             free(event);
1108             continue;
1109         }
1110
1111         int type = (event->response_type & ~0x80);
1112
1113         if (type == xkb_base && xkb_base > -1) {
1114             DLOG("received an xkb event\n");
1115
1116             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1117             if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1118                 int modstate = state->mods & config.modifier;
1119
1120 #define DLOGMOD(modmask, status)                        \
1121     do {                                                \
1122         switch (modmask) {                              \
1123             case ShiftMask:                             \
1124                 DLOG("ShiftMask got " #status "!\n");   \
1125                 break;                                  \
1126             case ControlMask:                           \
1127                 DLOG("ControlMask got " #status "!\n"); \
1128                 break;                                  \
1129             case Mod1Mask:                              \
1130                 DLOG("Mod1Mask got " #status "!\n");    \
1131                 break;                                  \
1132             case Mod2Mask:                              \
1133                 DLOG("Mod2Mask got " #status "!\n");    \
1134                 break;                                  \
1135             case Mod3Mask:                              \
1136                 DLOG("Mod3Mask got " #status "!\n");    \
1137                 break;                                  \
1138             case Mod4Mask:                              \
1139                 DLOG("Mod4Mask got " #status "!\n");    \
1140                 break;                                  \
1141             case Mod5Mask:                              \
1142                 DLOG("Mod5Mask got " #status "!\n");    \
1143                 break;                                  \
1144         }                                               \
1145     } while (0)
1146
1147                 if (modstate != mod_pressed) {
1148                     if (modstate == 0) {
1149                         DLOGMOD(config.modifier, released);
1150                         if (!activated_mode)
1151                             hide_bars();
1152                     } else {
1153                         DLOGMOD(config.modifier, pressed);
1154                         activated_mode = false;
1155                         unhide_bars();
1156                     }
1157                     mod_pressed = modstate;
1158                 }
1159 #undef DLOGMOD
1160             }
1161
1162             free(event);
1163             continue;
1164         }
1165
1166         switch (type) {
1167             case XCB_VISIBILITY_NOTIFY:
1168                 /* Visibility change: a bar is [un]obscured by other window */
1169                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1170                 break;
1171             case XCB_EXPOSE:
1172                 if (((xcb_expose_event_t *)event)->count == 0) {
1173                     /* Expose-events happen, when the window needs to be redrawn */
1174                     redraw_bars();
1175                 }
1176
1177                 break;
1178             case XCB_BUTTON_PRESS:
1179                 /* Button press events are mouse buttons clicked on one of our bars */
1180                 handle_button((xcb_button_press_event_t *)event);
1181                 break;
1182             case XCB_CLIENT_MESSAGE:
1183                 /* Client messages are used for client-to-client communication, for
1184                  * example system tray widgets talk to us directly via client messages. */
1185                 handle_client_message((xcb_client_message_event_t *)event);
1186                 break;
1187             case XCB_DESTROY_NOTIFY:
1188                 /* DestroyNotify signifies the end of the XEmbed protocol */
1189                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1190                 break;
1191             case XCB_UNMAP_NOTIFY:
1192                 /* UnmapNotify is received when a tray client hides its window. */
1193                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1194                 break;
1195             case XCB_MAP_NOTIFY:
1196                 handle_map_notify((xcb_map_notify_event_t *)event);
1197                 break;
1198             case XCB_PROPERTY_NOTIFY:
1199                 /* PropertyNotify */
1200                 handle_property_notify((xcb_property_notify_event_t *)event);
1201                 break;
1202             case XCB_CONFIGURE_REQUEST:
1203                 /* ConfigureRequest, sent by a tray child */
1204                 handle_configure_request((xcb_configure_request_event_t *)event);
1205                 break;
1206             case XCB_RESIZE_REQUEST:
1207                 /* ResizeRequest sent by a tray child using override_redirect. */
1208                 handle_resize_request((xcb_resize_request_event_t *)event);
1209                 break;
1210         }
1211         free(event);
1212     }
1213 }
1214
1215 /*
1216  * Dummy callback. We only need this, so that the prepare and check watchers
1217  * are triggered
1218  *
1219  */
1220 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1221 }
1222
1223 /*
1224  * Early initialization of the connection to X11: Everything which does not
1225  * depend on 'config'.
1226  *
1227  */
1228 char *init_xcb_early() {
1229     /* FIXME: xcb_connect leaks memory */
1230     xcb_connection = xcb_connect(NULL, &screen);
1231     if (xcb_connection_has_error(xcb_connection)) {
1232         ELOG("Cannot open display\n");
1233         exit(EXIT_FAILURE);
1234     }
1235     conn = xcb_connection;
1236     DLOG("Connected to xcb\n");
1237
1238 /* We have to request the atoms we need */
1239 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1240 #include "xcb_atoms.def"
1241
1242     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1243     xcb_root = root_screen->root;
1244
1245     depth = root_screen->root_depth;
1246     colormap = root_screen->default_colormap;
1247     visual_type = get_visualtype(root_screen);
1248
1249     xcb_cursor_context_t *cursor_ctx;
1250     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1251         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1252         xcb_cursor_context_free(cursor_ctx);
1253     } else {
1254         cursor = xcb_generate_id(xcb_connection);
1255         i3Font cursor_font = load_font("cursor", false);
1256         xcb_create_glyph_cursor(
1257             xcb_connection,
1258             cursor,
1259             cursor_font.specific.xcb.id,
1260             cursor_font.specific.xcb.id,
1261             XCB_CURSOR_LEFT_PTR,
1262             XCB_CURSOR_LEFT_PTR + 1,
1263             0, 0, 0,
1264             65535, 65535, 65535);
1265     }
1266
1267     /* The various watchers to communicate with xcb */
1268     xcb_io = smalloc(sizeof(ev_io));
1269     xcb_prep = smalloc(sizeof(ev_prepare));
1270     xcb_chk = smalloc(sizeof(ev_check));
1271
1272     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1273     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1274     ev_check_init(xcb_chk, &xcb_chk_cb);
1275
1276     /* Within an event loop iteration, run the xcb_chk watcher last: other
1277      * watchers might call xcb_flush(), which, unexpectedly, can also read
1278      * events into the queue (see _xcb_conn_wait). Hence, we need to drain xcb’s
1279      * queue last, otherwise we risk dead-locking. */
1280     ev_set_priority(xcb_chk, EV_MINPRI);
1281
1282     ev_io_start(main_loop, xcb_io);
1283     ev_prepare_start(main_loop, xcb_prep);
1284     ev_check_start(main_loop, xcb_chk);
1285
1286     /* Now we get the atoms and save them in a nice data structure */
1287     get_atoms();
1288
1289     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1290
1291     return path;
1292 }
1293
1294 /*
1295  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1296  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1297  * in xcb.
1298  *
1299  */
1300 void register_xkb_keyevents() {
1301     const xcb_query_extension_reply_t *extreply;
1302     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1303     if (!extreply->present) {
1304         ELOG("xkb is not present on this server\n");
1305         exit(EXIT_FAILURE);
1306     }
1307     DLOG("initializing xcb-xkb\n");
1308     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1309     xcb_xkb_select_events(conn,
1310                           XCB_XKB_ID_USE_CORE_KBD,
1311                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1312                           0,
1313                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1314                           0xff,
1315                           0xff,
1316                           NULL);
1317     xkb_base = extreply->first_event;
1318 }
1319
1320 /*
1321  * Deregister from xkb keyevents.
1322  *
1323  */
1324 void deregister_xkb_keyevents() {
1325     xcb_xkb_select_events(conn,
1326                           XCB_XKB_ID_USE_CORE_KBD,
1327                           0,
1328                           0,
1329                           0,
1330                           0xff,
1331                           0xff,
1332                           NULL);
1333 }
1334
1335 /*
1336  * Initialization which depends on 'config' being usable. Called after the
1337  * configuration has arrived.
1338  *
1339  */
1340 void init_xcb_late(char *fontname) {
1341     if (fontname == NULL)
1342         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1343
1344     /* Load the font */
1345     font = load_font(fontname, true);
1346     set_font(&font);
1347     DLOG("Calculated font height: %d\n", font.height);
1348     bar_height = font.height + 2 * logical_px(ws_voff_px);
1349     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1350
1351     if (config.separator_symbol)
1352         separator_symbol_width = predict_text_width(config.separator_symbol);
1353
1354     xcb_flush(xcb_connection);
1355
1356     if (config.hide_on_modifier == M_HIDE)
1357         register_xkb_keyevents();
1358 }
1359
1360 /*
1361  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1362  * selection.
1363  *
1364  */
1365 static void send_tray_clientmessage(void) {
1366     uint8_t buffer[32] = {0};
1367     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1368
1369     ev->response_type = XCB_CLIENT_MESSAGE;
1370     ev->window = xcb_root;
1371     ev->type = atoms[MANAGER];
1372     ev->format = 32;
1373     ev->data.data32[0] = XCB_CURRENT_TIME;
1374     ev->data.data32[1] = tray_reply->atom;
1375     ev->data.data32[2] = selwin;
1376
1377     xcb_send_event(xcb_connection,
1378                    0,
1379                    xcb_root,
1380                    0xFFFFFF,
1381                    (char *)buffer);
1382 }
1383
1384 /*
1385  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1386  * for the X11 display we are running on, then acquiring the selection for this
1387  * atom. Afterwards, tray clients will send ClientMessages to our window.
1388  *
1389  */
1390 void init_tray(void) {
1391     DLOG("Initializing system tray functionality\n");
1392     /* request the tray manager atom for the X11 display we are running on */
1393     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1394     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1395     xcb_intern_atom_cookie_t tray_cookie;
1396     if (tray_reply == NULL)
1397         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1398
1399     /* tray support: we need a window to own the selection */
1400     selwin = xcb_generate_id(xcb_connection);
1401     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1402     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1403     xcb_create_window(xcb_connection,
1404                       depth,
1405                       selwin,
1406                       xcb_root,
1407                       -1, -1,
1408                       1, 1,
1409                       0,
1410                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1411                       visual_type->visual_id,
1412                       selmask,
1413                       selval);
1414
1415     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1416     /* set the atoms */
1417     xcb_change_property(xcb_connection,
1418                         XCB_PROP_MODE_REPLACE,
1419                         selwin,
1420                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1421                         XCB_ATOM_CARDINAL,
1422                         32,
1423                         1,
1424                         &orientation);
1425     xcb_change_property(xcb_connection,
1426                         XCB_PROP_MODE_REPLACE,
1427                         selwin,
1428                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1429                         XCB_ATOM_VISUALID,
1430                         32,
1431                         1,
1432                         &visual_type->visual_id);
1433
1434     init_tray_colors();
1435
1436     if (tray_reply == NULL) {
1437         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1438             ELOG("Could not get atom %s\n", atomname);
1439             exit(EXIT_FAILURE);
1440         }
1441     }
1442
1443     xcb_set_selection_owner(xcb_connection,
1444                             selwin,
1445                             tray_reply->atom,
1446                             XCB_CURRENT_TIME);
1447
1448     /* Verify that we have the selection */
1449     xcb_get_selection_owner_cookie_t selcookie;
1450     xcb_get_selection_owner_reply_t *selreply;
1451
1452     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1453     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1454         ELOG("Could not get selection owner for %s\n", atomname);
1455         exit(EXIT_FAILURE);
1456     }
1457
1458     if (selreply->owner != selwin) {
1459         ELOG("Could not set the %s selection. "
1460              "Maybe another tray is already running?\n",
1461              atomname);
1462         /* NOTE that this error is not fatal. We just can’t provide tray
1463          * functionality */
1464         free(selreply);
1465         return;
1466     }
1467
1468     free(selreply);
1469
1470     send_tray_clientmessage();
1471 }
1472
1473 /*
1474  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1475  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1476  * they assume a light background.
1477  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1478  *
1479  */
1480 void init_tray_colors(void) {
1481     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1482     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1483
1484     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1485
1486     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1487                             {bar_fg[3], bar_fg[4], '\0'},
1488                             {bar_fg[5], bar_fg[6], '\0'}};
1489     const uint8_t r = strtol(strgroups[0], NULL, 16);
1490     const uint8_t g = strtol(strgroups[1], NULL, 16);
1491     const uint8_t b = strtol(strgroups[2], NULL, 16);
1492
1493     const uint16_t r16 = ((uint16_t)r << 8) | r;
1494     const uint16_t g16 = ((uint16_t)g << 8) | g;
1495     const uint16_t b16 = ((uint16_t)b << 8) | b;
1496
1497     const uint32_t tray_colors[12] = {
1498         r16, g16, b16, /* foreground color */
1499         r16, g16, b16, /* error color */
1500         r16, g16, b16, /* warning color */
1501         r16, g16, b16, /* success color */
1502     };
1503
1504     xcb_change_property(xcb_connection,
1505                         XCB_PROP_MODE_REPLACE,
1506                         selwin,
1507                         atoms[_NET_SYSTEM_TRAY_COLORS],
1508                         XCB_ATOM_CARDINAL,
1509                         32,
1510                         12,
1511                         tray_colors);
1512 }
1513
1514 /*
1515  * Cleanup the xcb stuff.
1516  * Called once, before the program terminates.
1517  *
1518  */
1519 void clean_xcb(void) {
1520     free_outputs();
1521
1522     free_font();
1523
1524     xcb_free_cursor(xcb_connection, cursor);
1525     xcb_flush(xcb_connection);
1526     xcb_aux_sync(xcb_connection);
1527     xcb_disconnect(xcb_connection);
1528
1529     ev_check_stop(main_loop, xcb_chk);
1530     ev_prepare_stop(main_loop, xcb_prep);
1531     ev_io_stop(main_loop, xcb_io);
1532
1533     FREE(xcb_chk);
1534     FREE(xcb_prep);
1535     FREE(xcb_io);
1536 }
1537
1538 /*
1539  * Get the earlier requested atoms and save them in the prepared data structure
1540  *
1541  */
1542 void get_atoms(void) {
1543     xcb_intern_atom_reply_t *reply;
1544 #define ATOM_DO(name)                                                        \
1545     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1546     if (reply == NULL) {                                                     \
1547         ELOG("Could not get atom %s\n", #name);                              \
1548         exit(EXIT_FAILURE);                                                  \
1549     }                                                                        \
1550     atoms[name] = reply->atom;                                               \
1551     free(reply);
1552
1553 #include "xcb_atoms.def"
1554     DLOG("Got atoms\n");
1555 }
1556
1557 /*
1558  * Reparents all tray clients of the specified output to the root window. This
1559  * is either used when shutting down, when an output appears (xrandr --output
1560  * VGA1 --off) or when the primary output changes.
1561  *
1562  * Applications using the tray will start the protocol from the beginning again
1563  * afterwards.
1564  *
1565  */
1566 void kick_tray_clients(i3_output *output) {
1567     if (TAILQ_EMPTY(output->trayclients))
1568         return;
1569
1570     trayclient *trayclient;
1571     while (!TAILQ_EMPTY(output->trayclients)) {
1572         trayclient = TAILQ_FIRST(output->trayclients);
1573         /* Unmap, then reparent (to root) the tray client windows */
1574         xcb_unmap_window(xcb_connection, trayclient->win);
1575         xcb_reparent_window(xcb_connection,
1576                             trayclient->win,
1577                             xcb_root,
1578                             0,
1579                             0);
1580
1581         /* We remove the trayclient right here. We might receive an UnmapNotify
1582          * event afterwards, but better safe than sorry. */
1583         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1584         FREE(trayclient);
1585     }
1586
1587     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1588      * We cannot actually destroy the window because then Qt will not restore
1589      * its event mask on the new window. */
1590     uint8_t buffer[32] = {0};
1591     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1592
1593     event->response_type = XCB_DESTROY_NOTIFY;
1594     event->event = selwin;
1595     event->window = selwin;
1596
1597     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1598
1599     send_tray_clientmessage();
1600 }
1601
1602 /*
1603  * Destroy the bar of the specified output
1604  *
1605  */
1606 void destroy_window(i3_output *output) {
1607     if (output == NULL) {
1608         return;
1609     }
1610     if (output->bar.id == XCB_NONE) {
1611         return;
1612     }
1613
1614     kick_tray_clients(output);
1615     xcb_destroy_window(xcb_connection, output->bar.id);
1616     output->bar.id = XCB_NONE;
1617 }
1618
1619 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1620  * by the `position` bar config directive. */
1621 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1622     /* A local struct to save the strut_partial property */
1623     struct {
1624         uint32_t left;
1625         uint32_t right;
1626         uint32_t top;
1627         uint32_t bottom;
1628         uint32_t left_start_y;
1629         uint32_t left_end_y;
1630         uint32_t right_start_y;
1631         uint32_t right_end_y;
1632         uint32_t top_start_x;
1633         uint32_t top_end_x;
1634         uint32_t bottom_start_x;
1635         uint32_t bottom_end_x;
1636     } __attribute__((__packed__)) strut_partial;
1637     memset(&strut_partial, 0, sizeof(strut_partial));
1638
1639     switch (config.position) {
1640         case POS_NONE:
1641             break;
1642         case POS_TOP:
1643             strut_partial.top = bar_height;
1644             strut_partial.top_start_x = output->rect.x;
1645             strut_partial.top_end_x = output->rect.x + output->rect.w;
1646             break;
1647         case POS_BOT:
1648             strut_partial.bottom = bar_height;
1649             strut_partial.bottom_start_x = output->rect.x;
1650             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1651             break;
1652     }
1653     return xcb_change_property(xcb_connection,
1654                                XCB_PROP_MODE_REPLACE,
1655                                output->bar.id,
1656                                atoms[_NET_WM_STRUT_PARTIAL],
1657                                XCB_ATOM_CARDINAL,
1658                                32,
1659                                12,
1660                                &strut_partial);
1661 }
1662
1663 /*
1664  * Reconfigure all bars and create new bars for recently activated outputs
1665  *
1666  */
1667 void reconfig_windows(bool redraw_bars) {
1668     uint32_t mask;
1669     uint32_t values[6];
1670     static bool tray_configured = false;
1671
1672     i3_output *walk;
1673     SLIST_FOREACH(walk, outputs, slist) {
1674         if (!walk->active) {
1675             /* If an output is not active, we destroy its bar */
1676             /* FIXME: Maybe we rather want to unmap? */
1677             DLOG("Destroying window for output %s\n", walk->name);
1678             destroy_window(walk);
1679             continue;
1680         }
1681         if (walk->bar.id == XCB_NONE) {
1682             DLOG("Creating window for output %s\n", walk->name);
1683
1684             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1685             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1686             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1687             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1688
1689             values[0] = colors.bar_bg.colorpixel;
1690             values[1] = root_screen->black_pixel;
1691             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1692             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1693             /* We enable the following EventMask fields:
1694              * EXPOSURE, to get expose events (we have to re-draw then)
1695              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1696              *                        child windows use ConfigureWindow
1697              * BUTTON_PRESS, to handle clicks on the workspace buttons
1698              * */
1699             values[3] = XCB_EVENT_MASK_EXPOSURE |
1700                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1701                         XCB_EVENT_MASK_BUTTON_PRESS;
1702             if (config.hide_on_modifier == M_DOCK) {
1703                 /* If the bar is normally visible, catch visibility change events to suspend
1704                  * the status process when the bar is obscured by full-screened windows.  */
1705                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1706                 walk->visible = true;
1707             }
1708             values[4] = colormap;
1709             values[5] = cursor;
1710
1711             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1712                                                                      depth,
1713                                                                      bar_id,
1714                                                                      xcb_root,
1715                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1716                                                                      walk->rect.w, bar_height,
1717                                                                      0,
1718                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1719                                                                      visual_type->visual_id,
1720                                                                      mask,
1721                                                                      values);
1722
1723             /* The double-buffer we use to render stuff off-screen */
1724             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1725                                                                     depth,
1726                                                                     buffer_id,
1727                                                                     bar_id,
1728                                                                     walk->rect.w,
1729                                                                     bar_height);
1730
1731             /* The double-buffer we use to render the statusline before copying to buffer */
1732             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1733                                                                       depth,
1734                                                                       statusline_buffer_id,
1735                                                                       bar_id,
1736                                                                       walk->rect.w,
1737                                                                       bar_height);
1738
1739             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1740             xcb_void_cookie_t class_cookie;
1741             class_cookie = xcb_change_property(xcb_connection,
1742                                                XCB_PROP_MODE_REPLACE,
1743                                                bar_id,
1744                                                XCB_ATOM_WM_CLASS,
1745                                                XCB_ATOM_STRING,
1746                                                8,
1747                                                (strlen("i3bar") + 1) * 2,
1748                                                "i3bar\0i3bar\0");
1749
1750             char *name;
1751             sasprintf(&name, "i3bar for output %s", walk->name);
1752             xcb_void_cookie_t name_cookie;
1753             name_cookie = xcb_change_property(xcb_connection,
1754                                               XCB_PROP_MODE_REPLACE,
1755                                               bar_id,
1756                                               XCB_ATOM_WM_NAME,
1757                                               XCB_ATOM_STRING,
1758                                               8,
1759                                               strlen(name),
1760                                               name);
1761             free(name);
1762
1763             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1764              * this one */
1765             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1766                                                                 XCB_PROP_MODE_REPLACE,
1767                                                                 bar_id,
1768                                                                 atoms[_NET_WM_WINDOW_TYPE],
1769                                                                 XCB_ATOM_ATOM,
1770                                                                 32,
1771                                                                 1,
1772                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1773
1774             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1775             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1776             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1777
1778             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1779
1780             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1781             xcb_void_cookie_t map_cookie;
1782             if (config.hide_on_modifier == M_DOCK) {
1783                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1784             }
1785
1786             if (xcb_request_failed(win_cookie, "Could not create window") ||
1787                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1788                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1789                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1790                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1791                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1792                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1793                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1794                 exit(EXIT_FAILURE);
1795             }
1796
1797             /* Unless "tray_output none" was specified, we need to initialize the tray. */
1798             bool no_tray = false;
1799             if (!(TAILQ_EMPTY(&(config.tray_outputs)))) {
1800                 no_tray = strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0;
1801             }
1802
1803             /*
1804              * There are three scenarios in which we need to initialize the tray:
1805              *   1. A specific output was listed in tray_outputs which is also
1806              *      in the list of outputs managed by this bar.
1807              *   2. No tray_output directive was specified. In this case, we
1808              *      use the first available output.
1809              *   3. 'tray_output primary' was specified. In this case we use the
1810              *      primary output.
1811              *
1812              * Three scenarios in which we specifically don't want to
1813              * initialize the tray are:
1814              *   1. 'tray_output none' was specified.
1815              *   2. A specific output was listed as a tray_output, but is not
1816              *      one of the outputs managed by this bar. For example, consider
1817              *      tray_outputs == [VGA-1], but outputs == [HDMI-1].
1818              *   3. 'tray_output primary' was specified and no output in the list
1819              *      is primary.
1820              */
1821             if (!tray_configured && !no_tray) {
1822                 /* If no tray_output was specified, we go ahead and initialize the tray as
1823                  * we will be using the first available output. */
1824                 if (TAILQ_EMPTY(&(config.tray_outputs))) {
1825                     init_tray();
1826                 }
1827
1828                 /* If one or more tray_output assignments were specified, we ensure that at least one of
1829                  * them is actually an output managed by this instance. */
1830                 tray_output_t *tray_output;
1831                 TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1832                     i3_output *output;
1833                     bool found = false;
1834                     SLIST_FOREACH(output, outputs, slist) {
1835                         if (strcasecmp(output->name, tray_output->output) == 0 ||
1836                             (strcasecmp(tray_output->output, "primary") == 0 && output->primary)) {
1837                             found = true;
1838                             init_tray();
1839                             break;
1840                         }
1841                     }
1842
1843                     if (found)
1844                         break;
1845                 }
1846
1847                 tray_configured = true;
1848             }
1849         } else {
1850             /* We already have a bar, so we just reconfigure it */
1851             mask = XCB_CONFIG_WINDOW_X |
1852                    XCB_CONFIG_WINDOW_Y |
1853                    XCB_CONFIG_WINDOW_WIDTH |
1854                    XCB_CONFIG_WINDOW_HEIGHT |
1855                    XCB_CONFIG_WINDOW_STACK_MODE;
1856             values[0] = walk->rect.x;
1857             if (config.position == POS_TOP)
1858                 values[1] = walk->rect.y;
1859             else
1860                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1861             values[2] = walk->rect.w;
1862             values[3] = bar_height;
1863             values[4] = XCB_STACK_MODE_ABOVE;
1864
1865             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1866             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1867
1868             DLOG("Destroying buffer for output %s\n", walk->name);
1869             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1870
1871             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1872             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1873
1874             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1875             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1876                                                                         walk->bar.id,
1877                                                                         mask,
1878                                                                         values);
1879
1880             mask = XCB_CW_OVERRIDE_REDIRECT;
1881             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1882             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1883             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1884                                                                         walk->bar.id,
1885                                                                         mask,
1886                                                                         values);
1887
1888             DLOG("Recreating buffer for output %s\n", walk->name);
1889             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1890                                                                     depth,
1891                                                                     walk->buffer.id,
1892                                                                     walk->bar.id,
1893                                                                     walk->rect.w,
1894                                                                     bar_height);
1895
1896             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1897             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1898                                                                       depth,
1899                                                                       walk->statusline_buffer.id,
1900                                                                       walk->bar.id,
1901                                                                       walk->rect.w,
1902                                                                       bar_height);
1903
1904             draw_util_surface_free(xcb_connection, &(walk->bar));
1905             draw_util_surface_free(xcb_connection, &(walk->buffer));
1906             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1907             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1908             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1909             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1910
1911             xcb_void_cookie_t map_cookie, umap_cookie;
1912             if (redraw_bars) {
1913                 /* Unmap the window, and draw it again when in dock mode */
1914                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1915                 if (config.hide_on_modifier == M_DOCK) {
1916                     cont_child();
1917                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1918                 } else {
1919                     stop_child();
1920                 }
1921
1922                 if (config.hide_on_modifier == M_HIDE) {
1923                     /* Switching to hide mode, register for keyevents */
1924                     register_xkb_keyevents();
1925                 } else {
1926                     /* Switching to dock/invisible mode, deregister from keyevents */
1927                     deregister_xkb_keyevents();
1928                 }
1929             }
1930
1931             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1932                 xcb_request_failed(chg_cookie, "Could not change window") ||
1933                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1934                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1935                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1936                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1937                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1938                 exit(EXIT_FAILURE);
1939             }
1940         }
1941     }
1942 }
1943
1944 /*
1945  * Render the bars, with buttons and statusline
1946  *
1947  */
1948 void draw_bars(bool unhide) {
1949     DLOG("Drawing bars...\n");
1950
1951     uint32_t full_statusline_width = predict_statusline_length(false);
1952     uint32_t short_statusline_width = predict_statusline_length(true);
1953
1954     i3_output *outputs_walk;
1955     SLIST_FOREACH(outputs_walk, outputs, slist) {
1956         int workspace_width = 0;
1957
1958         if (!outputs_walk->active) {
1959             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1960             continue;
1961         }
1962         if (outputs_walk->bar.id == XCB_NONE) {
1963             /* Oh shit, an active output without an own bar. Create it now! */
1964             reconfig_windows(false);
1965         }
1966
1967         bool use_focus_colors = output_has_focus(outputs_walk);
1968
1969         /* First things first: clear the backbuffer */
1970         draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1971
1972         if (!config.disable_ws) {
1973             i3_ws *ws_walk;
1974             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1975                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1976                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1977                 color_t fg_color = colors.inactive_ws_fg;
1978                 color_t bg_color = colors.inactive_ws_bg;
1979                 color_t border_color = colors.inactive_ws_border;
1980                 if (ws_walk->visible) {
1981                     if (!ws_walk->focused) {
1982                         fg_color = colors.active_ws_fg;
1983                         bg_color = colors.active_ws_bg;
1984                         border_color = colors.active_ws_border;
1985                     } else {
1986                         fg_color = colors.focus_ws_fg;
1987                         bg_color = colors.focus_ws_bg;
1988                         border_color = colors.focus_ws_border;
1989                     }
1990                 }
1991                 if (ws_walk->urgent) {
1992                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1993                     fg_color = colors.urgent_ws_fg;
1994                     bg_color = colors.urgent_ws_bg;
1995                     border_color = colors.urgent_ws_border;
1996                     unhide = true;
1997                 }
1998
1999                 /* Draw the border of the button. */
2000                 draw_util_rectangle(&(outputs_walk->buffer), border_color,
2001                                     workspace_width,
2002                                     logical_px(1),
2003                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
2004                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
2005
2006                 /* Draw the inside of the button. */
2007                 draw_util_rectangle(&(outputs_walk->buffer), bg_color,
2008                                     workspace_width + logical_px(1),
2009                                     2 * logical_px(1),
2010                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
2011                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
2012
2013                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
2014                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2015                                logical_px(ws_voff_px),
2016                                ws_walk->name_width);
2017
2018                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
2019                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
2020                     workspace_width += logical_px(ws_spacing_px);
2021             }
2022         }
2023
2024         if (binding.name && !config.disable_binding_mode_indicator) {
2025             workspace_width += logical_px(ws_spacing_px);
2026
2027             color_t fg_color = colors.binding_mode_fg;
2028             color_t bg_color = colors.binding_mode_bg;
2029
2030             draw_util_rectangle(&(outputs_walk->buffer), colors.binding_mode_border,
2031                                 workspace_width,
2032                                 logical_px(1),
2033                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
2034                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
2035
2036             draw_util_rectangle(&(outputs_walk->buffer), bg_color,
2037                                 workspace_width + logical_px(1),
2038                                 2 * logical_px(1),
2039                                 binding.width + 2 * logical_px(ws_hoff_px),
2040                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
2041
2042             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
2043                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2044                            logical_px(ws_voff_px),
2045                            binding.width);
2046
2047             unhide = true;
2048             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
2049         }
2050
2051         if (!TAILQ_EMPTY(&statusline_head)) {
2052             DLOG("Printing statusline!\n");
2053
2054             int tray_width = get_tray_width(outputs_walk->trayclients);
2055             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
2056             uint32_t clip_left = 0;
2057             uint32_t statusline_width = full_statusline_width;
2058             bool use_short_text = false;
2059
2060             if (statusline_width > max_statusline_width) {
2061                 statusline_width = short_statusline_width;
2062                 use_short_text = true;
2063                 if (statusline_width > max_statusline_width) {
2064                     clip_left = statusline_width - max_statusline_width;
2065                 }
2066             }
2067
2068             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
2069             int x_dest = outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width;
2070
2071             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
2072             draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2073                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2074
2075             outputs_walk->statusline_width = statusline_width;
2076             outputs_walk->statusline_short_text = use_short_text;
2077         }
2078     }
2079
2080     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2081     if (mod_pressed ||
2082         config.hidden_state == S_SHOW ||
2083         unhide) {
2084         unhide_bars();
2085     } else if (config.hide_on_modifier == M_HIDE) {
2086         hide_bars();
2087     }
2088
2089     redraw_bars();
2090 }
2091
2092 /*
2093  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2094  *
2095  */
2096 void redraw_bars(void) {
2097     i3_output *outputs_walk;
2098     SLIST_FOREACH(outputs_walk, outputs, slist) {
2099         if (!outputs_walk->active) {
2100             continue;
2101         }
2102
2103         draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2104                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2105         xcb_flush(xcb_connection);
2106     }
2107 }
2108
2109 /*
2110  * Set the current binding mode
2111  *
2112  */
2113 void set_current_mode(struct mode *current) {
2114     I3STRING_FREE(binding.name);
2115     binding = *current;
2116     activated_mode = binding.name != NULL;
2117     return;
2118 }