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   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3bar - an xcb-based status- and ws-bar for i3
   5  * © 2010 Axel Wagner and contributors (see also: LICENSE)
   6  *
   7  * xcb.c: Communicating with X
   8  *
   9  */
  10 #include "common.h"
  11
  12 #include <xcb/xcb.h>
  13 #include <xcb/xkb.h>
  14 #include <xcb/xproto.h>
  15 #include <xcb/xcb_aux.h>
  16 #include <xcb/xcb_cursor.h>
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <string.h>
  23 #include <i3/ipc.h>
  24 #include <ev.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27 #include <err.h>
  28
  29 #include <X11/Xlib.h>
  30 #include <X11/XKBlib.h>
  31 #include <X11/extensions/XKB.h>
  32
  33 #ifdef I3_ASAN_ENABLED
  34 #include <sanitizer/lsan_interface.h>
  35 #endif
  36
  37 #include "libi3.h"
  38
  39 /** This is the equivalent of XC_left_ptr. I’m not sure why xcb doesn’t have a
  40  * constant for that. */
  41 #define XCB_CURSOR_LEFT_PTR 68
  42
  43 /* We save the atoms in an easy to access array, indexed by an enum */
  44 enum {
  45 #define ATOM_DO(name) name,
  46 #include "xcb_atoms.def"
  47     NUM_ATOMS
  48 };
  49
  50 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  51 xcb_atom_t atoms[NUM_ATOMS];
  52
  53 /* Variables, that are the same for all functions at all times */
  54 xcb_connection_t *xcb_connection;
  55 int screen;
  56 xcb_screen_t *root_screen;
  57 xcb_window_t xcb_root;
  58 static xcb_cursor_t cursor;
  59
  60 /* selection window for tray support */
  61 static xcb_window_t selwin = XCB_NONE;
  62 static xcb_intern_atom_reply_t *tray_reply = NULL;
  63
  64 /* This is needed for integration with libi3 */
  65 xcb_connection_t *conn;
  66
  67 /* The font we'll use */
  68 static i3Font font;
  69
  70 /* Icon size (based on font size) */
  71 int icon_size;
  72
  73 xcb_visualtype_t *visual_type;
  74 uint8_t depth;
  75 xcb_colormap_t colormap;
  76
  77 /* Overall height of the bar (based on font size) */
  78 int bar_height;
  79
  80 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  81 int xkb_base;
  82 bool mod_pressed = 0;
  83
  84 /* Event watchers, to interact with the user */
  85 ev_prepare *xcb_prep;
  86 ev_io *xcb_io;
  87 ev_io *xkb_io;
  88
  89 /* The name of current binding mode */
  90 static mode binding;
  91
  92 /* Indicates whether a new binding mode was recently activated */
  93 bool activated_mode = false;
  94
  95 /* The output in which the tray should be displayed. */
  96 static i3_output *output_for_tray;
  97
  98 /* The parsed colors */
  99 struct xcb_colors_t {
 100     color_t bar_fg;
 101     color_t bar_bg;
 102     color_t sep_fg;
 103     color_t focus_bar_fg;
 104     color_t focus_bar_bg;
 105     color_t focus_sep_fg;
 106     color_t active_ws_fg;
 107     color_t active_ws_bg;
 108     color_t active_ws_border;
 109     color_t inactive_ws_fg;
 110     color_t inactive_ws_bg;
 111     color_t inactive_ws_border;
 112     color_t urgent_ws_bg;
 113     color_t urgent_ws_fg;
 114     color_t urgent_ws_border;
 115     color_t focus_ws_bg;
 116     color_t focus_ws_fg;
 117     color_t focus_ws_border;
 118     color_t binding_mode_bg;
 119     color_t binding_mode_fg;
 120     color_t binding_mode_border;
 121 };
 122 struct xcb_colors_t colors;
 123
 124 /* Horizontal offset between a workspace label and button borders */
 125 static const int ws_hoff_px = 4;
 126
 127 /* Vertical offset between a workspace label and button borders */
 128 static const int ws_voff_px = 3;
 129
 130 /* Offset between two workspace buttons */
 131 static const int ws_spacing_px = 1;
 132
 133 /* Offset between the statusline and 1) workspace buttons on the left
 134  *                                   2) the tray or screen edge on the right */
 135 static const int sb_hoff_px = 4;
 136
 137 /* Additional offset between the tray and the statusline, if the tray is not empty */
 138 static const int tray_loff_px = 2;
 139
 140 /* Vertical offset between the bar and a separator */
 141 static const int sep_voff_px = 4;
 142
 143 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 144     xcb_generic_error_t *err;
 145     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 146         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 147         return err->error_code;
 148     }
 149     return 0;
 150 }
 151
 152 static uint32_t get_sep_offset(struct status_block *block) {
 153     if (!block->no_separator && block->sep_block_width > 0)
 154         return block->sep_block_width / 2 + block->sep_block_width % 2;
 155     return 0;
 156 }
 157
 158 static int get_tray_width(struct tc_head *trayclients) {
 159     trayclient *trayclient;
 160     int tray_width = 0;
 161     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 162         if (!trayclient->mapped)
 163             continue;
 164         tray_width += icon_size + logical_px(config.tray_padding);
 165     }
 166     if (tray_width > 0)
 167         tray_width += logical_px(tray_loff_px);
 168     return tray_width;
 169 }
 170
 171 /*
 172  * Draws a separator for the given block if necessary.
 173  *
 174  */
 175 static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
 176     color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
 177     color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 178
 179     uint32_t sep_offset = get_sep_offset(block);
 180     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 181         return;
 182
 183     uint32_t center_x = x - sep_offset;
 184     if (config.separator_symbol == NULL) {
 185         /* Draw a classic one pixel, vertical separator. */
 186         draw_util_rectangle(&output->statusline_buffer, sep_fg,
 187                             center_x,
 188                             logical_px(sep_voff_px),
 189                             logical_px(1),
 190                             bar_height - 2 * logical_px(sep_voff_px));
 191     } else {
 192         /* Draw a custom separator. */
 193         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 194         draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
 195                        separator_x, logical_px(ws_voff_px), x - separator_x);
 196     }
 197 }
 198
 199 static uint32_t predict_statusline_length(bool use_short_text) {
 200     uint32_t width = 0;
 201     struct status_block *block;
 202
 203     TAILQ_FOREACH(block, &statusline_head, blocks) {
 204         i3String *text = block->full_text;
 205         struct status_block_render_desc *render = &block->full_render;
 206         if (use_short_text && block->short_text != NULL) {
 207             text = block->short_text;
 208             render = &block->short_render;
 209         }
 210
 211         if (i3string_get_num_bytes(text) == 0)
 212             continue;
 213
 214         render->width = predict_text_width(text);
 215         if (block->border)
 216             render->width += logical_px(2);
 217
 218         /* Compute offset and append for text aligment in min_width. */
 219         if (block->min_width <= render->width) {
 220             render->x_offset = 0;
 221             render->x_append = 0;
 222         } else {
 223             uint32_t padding_width = block->min_width - render->width;
 224             switch (block->align) {
 225                 case ALIGN_LEFT:
 226                     render->x_append = padding_width;
 227                     break;
 228                 case ALIGN_RIGHT:
 229                     render->x_offset = padding_width;
 230                     break;
 231                 case ALIGN_CENTER:
 232                     render->x_offset = padding_width / 2;
 233                     render->x_append = padding_width / 2 + padding_width % 2;
 234                     break;
 235             }
 236         }
 237
 238         width += render->width + render->x_offset + render->x_append;
 239
 240         /* If this is not the last block, add some pixels for a separator. */
 241         if (TAILQ_NEXT(block, blocks) != NULL)
 242             width += block->sep_block_width;
 243     }
 244
 245     return width;
 246 }
 247
 248 /*
 249  * Redraws the statusline to the output's statusline_buffer
 250  */
 251 static void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
 252     struct status_block *block;
 253
 254     color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
 255     draw_util_clear_surface(&output->statusline_buffer, bar_color);
 256
 257     /* Use unsigned integer wraparound to clip off the left side.
 258      * For example, if clip_left is 75, then x will start at the very large
 259      * number INT_MAX-75, which is way outside the surface dimensions. Drawing
 260      * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
 261      * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
 262      * actually rendering content to the surface. */
 263     uint32_t x = 0 - clip_left;
 264
 265     /* Draw the text of each block */
 266     TAILQ_FOREACH(block, &statusline_head, blocks) {
 267         i3String *text = block->full_text;
 268         struct status_block_render_desc *render = &block->full_render;
 269         if (use_short_text && block->short_text != NULL) {
 270             text = block->short_text;
 271             render = &block->short_render;
 272         }
 273
 274         if (i3string_get_num_bytes(text) == 0)
 275             continue;
 276
 277         color_t fg_color;
 278         if (block->urgent) {
 279             fg_color = colors.urgent_ws_fg;
 280         } else if (block->color) {
 281             fg_color = draw_util_hex_to_color(block->color);
 282         } else if (use_focus_colors) {
 283             fg_color = colors.focus_bar_fg;
 284         } else {
 285             fg_color = colors.bar_fg;
 286         }
 287
 288         color_t bg_color = bar_color;
 289
 290         int border_width = (block->border) ? logical_px(1) : 0;
 291         int full_render_width = render->width + render->x_offset + render->x_append;
 292         if (block->border || block->background || block->urgent) {
 293             /* Let's determine the colors first. */
 294             color_t border_color = bar_color;
 295             if (block->urgent) {
 296                 border_color = colors.urgent_ws_border;
 297                 bg_color = colors.urgent_ws_bg;
 298             } else {
 299                 if (block->border)
 300                     border_color = draw_util_hex_to_color(block->border);
 301                 if (block->background)
 302                     bg_color = draw_util_hex_to_color(block->background);
 303             }
 304
 305             /* Draw the border. */
 306             draw_util_rectangle(&output->statusline_buffer, border_color,
 307                                 x, logical_px(1),
 308                                 full_render_width,
 309                                 bar_height - logical_px(2));
 310
 311             /* Draw the background. */
 312             draw_util_rectangle(&output->statusline_buffer, bg_color,
 313                                 x + border_width,
 314                                 logical_px(1) + border_width,
 315                                 full_render_width - 2 * border_width,
 316                                 bar_height - 2 * border_width - logical_px(2));
 317         }
 318
 319         draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
 320                        x + render->x_offset + border_width, logical_px(ws_voff_px),
 321                        render->width - 2 * border_width);
 322         x += full_render_width;
 323
 324         /* If this is not the last block, draw a separator. */
 325         if (TAILQ_NEXT(block, blocks) != NULL) {
 326             x += block->sep_block_width;
 327             draw_separator(output, x, block, use_focus_colors);
 328         }
 329     }
 330 }
 331
 332 /*
 333  * Hides all bars (unmaps them)
 334  *
 335  */
 336 static void hide_bars(void) {
 337     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 338         return;
 339     }
 340
 341     i3_output *walk;
 342     SLIST_FOREACH(walk, outputs, slist) {
 343         if (!walk->active) {
 344             continue;
 345         }
 346         xcb_unmap_window(xcb_connection, walk->bar.id);
 347     }
 348     stop_child();
 349 }
 350
 351 /*
 352  * Unhides all bars (maps them)
 353  *
 354  */
 355 static void unhide_bars(void) {
 356     if (config.hide_on_modifier != M_HIDE) {
 357         return;
 358     }
 359
 360     i3_output *walk;
 361     xcb_void_cookie_t cookie;
 362     uint32_t mask;
 363     uint32_t values[5];
 364
 365     cont_child();
 366
 367     SLIST_FOREACH(walk, outputs, slist) {
 368         if (walk->bar.id == XCB_NONE) {
 369             continue;
 370         }
 371         mask = XCB_CONFIG_WINDOW_X |
 372                XCB_CONFIG_WINDOW_Y |
 373                XCB_CONFIG_WINDOW_WIDTH |
 374                XCB_CONFIG_WINDOW_HEIGHT |
 375                XCB_CONFIG_WINDOW_STACK_MODE;
 376         values[0] = walk->rect.x;
 377         if (config.position == POS_TOP)
 378             values[1] = walk->rect.y;
 379         else
 380             values[1] = walk->rect.y + walk->rect.h - bar_height;
 381         values[2] = walk->rect.w;
 382         values[3] = bar_height;
 383         values[4] = XCB_STACK_MODE_ABOVE;
 384         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 385         cookie = xcb_configure_window_checked(xcb_connection,
 386                                               walk->bar.id,
 387                                               mask,
 388                                               values);
 389
 390         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 391             exit(EXIT_FAILURE);
 392         }
 393         xcb_map_window(xcb_connection, walk->bar.id);
 394     }
 395 }
 396
 397 /*
 398  * Parse the colors into a format that we can use
 399  *
 400  */
 401 void init_colors(const struct xcb_color_strings_t *new_colors) {
 402 #define PARSE_COLOR(name, def)                                                           \
 403     do {                                                                                 \
 404         colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
 405     } while (0)
 406     PARSE_COLOR(bar_fg, "#FFFFFF");
 407     PARSE_COLOR(bar_bg, "#000000");
 408     PARSE_COLOR(sep_fg, "#666666");
 409     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 410     PARSE_COLOR(active_ws_bg, "#333333");
 411     PARSE_COLOR(active_ws_border, "#333333");
 412     PARSE_COLOR(inactive_ws_fg, "#888888");
 413     PARSE_COLOR(inactive_ws_bg, "#222222");
 414     PARSE_COLOR(inactive_ws_border, "#333333");
 415     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 416     PARSE_COLOR(urgent_ws_bg, "#900000");
 417     PARSE_COLOR(urgent_ws_border, "#2f343a");
 418     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 419     PARSE_COLOR(focus_ws_bg, "#285577");
 420     PARSE_COLOR(focus_ws_border, "#4c7899");
 421 #undef PARSE_COLOR
 422
 423 #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
 424     do {                                                                                             \
 425         colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
 426     } while (0)
 427
 428     /* For the binding mode indicator colors, we don't hardcode a default.
 429      * Instead, we fall back to urgent_ws_* colors. */
 430     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 431     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 432     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 433
 434     /* Similarly, for unspecified focused bar colors, we fall back to the
 435      * regular bar colors. */
 436     PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
 437     PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
 438     PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
 439 #undef PARSE_COLOR_FALLBACK
 440
 441     init_tray_colors();
 442     xcb_flush(xcb_connection);
 443 }
 444
 445 static bool execute_custom_command(xcb_keycode_t input_code, bool event_is_release) {
 446     binding_t *binding;
 447     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 448         if ((binding->input_code != input_code) || (binding->release != event_is_release))
 449             continue;
 450
 451         i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, binding->command);
 452         return true;
 453     }
 454     return false;
 455 }
 456
 457 static void child_handle_button(xcb_button_press_event_t *event, i3_output *output, uint32_t statusline_x) {
 458     if (!child_want_click_events()) {
 459         return;
 460     }
 461
 462     if (statusline_x > (uint32_t)output->statusline_width) {
 463         return;
 464     }
 465
 466     /* x of the start of the current block relative to the statusline. */
 467     uint32_t last_block_x = 0;
 468     struct status_block *block;
 469     TAILQ_FOREACH(block, &statusline_head, blocks) {
 470         i3String *text;
 471         struct status_block_render_desc *render;
 472         if (output->statusline_short_text && block->short_text != NULL) {
 473             text = block->short_text;
 474             render = &block->short_render;
 475         } else {
 476             text = block->full_text;
 477             render = &block->full_render;
 478         }
 479
 480         if (i3string_get_num_bytes(text) == 0) {
 481             continue;
 482         }
 483
 484         /* Include the whole block in our calculations: when min_width is
 485          * specified, we have to take padding width into account. */
 486         const uint32_t full_render_width = render->width + render->x_offset + render->x_append;
 487         /* x of the click event relative to the current block. */
 488         const uint32_t relative_x = statusline_x - last_block_x;
 489         if (relative_x <= full_render_width) {
 490             send_block_clicked(event->detail, block->name, block->instance,
 491                                event->root_x, event->root_y, relative_x,
 492                                event->event_y, full_render_width, bar_height,
 493                                event->state);
 494             return;
 495         }
 496
 497         last_block_x += full_render_width + block->sep_block_width;
 498         if (last_block_x > statusline_x) {
 499             /* Click was on a separator. */
 500             return;
 501         }
 502     }
 503 }
 504
 505 /*
 506  * Handle a button press event (i.e. a mouse click on one of our bars).
 507  * We determine, whether the click occurred on a workspace button or if the scroll-
 508  * wheel was used and change the workspace appropriately
 509  *
 510  */
 511 static void handle_button(xcb_button_press_event_t *event) {
 512     /* Determine, which bar was clicked */
 513     i3_output *walk;
 514     xcb_window_t bar = event->event;
 515     SLIST_FOREACH(walk, outputs, slist) {
 516         if (walk->bar.id == bar) {
 517             break;
 518         }
 519     }
 520
 521     if (walk == NULL) {
 522         DLOG("Unknown bar clicked!\n");
 523         return;
 524     }
 525
 526     DLOG("Got button %d\n", event->detail);
 527
 528     /* During button release events, only check for custom commands. */
 529     const bool event_is_release = (event->response_type & ~0x80) == XCB_BUTTON_RELEASE;
 530
 531     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 532     int workspace_width = 0;
 533     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 534
 535     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 536         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 537         if (x >= workspace_width && x <= workspace_width + w)
 538             clicked_ws = ws_walk;
 539         if (ws_walk->visible)
 540             cur_ws = ws_walk;
 541         workspace_width += w;
 542         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 543             workspace_width += logical_px(ws_spacing_px);
 544     }
 545
 546     if (x > workspace_width) {
 547         const int tray_width = get_tray_width(walk->trayclients);
 548         /* Calculate the horizontal coordinate (x) of the start of the
 549          * statusline by subtracting its width and the width of the tray from
 550          * the bar width. */
 551         const int offset = walk->rect.w - walk->statusline_width -
 552                            tray_width - logical_px((tray_width > 0) * sb_hoff_px);
 553         if (x >= offset) {
 554             /* Click was after the start of the statusline, return to avoid
 555              * executing any other actions even if a click event is not
 556              * produced eventually. */
 557
 558             if (!event_is_release) {
 559                 /* x of the click event relative to the start of the
 560                  * statusline. */
 561                 const uint32_t statusline_x = x - offset;
 562                 child_handle_button(event, walk, statusline_x);
 563             }
 564
 565             return;
 566         }
 567     }
 568
 569     /* If a custom command was specified for this mouse button, it overrides
 570      * the default behavior. */
 571     if (execute_custom_command(event->detail, event_is_release) || event_is_release) {
 572         return;
 573     }
 574
 575     if (cur_ws == NULL) {
 576         DLOG("No workspace active?\n");
 577         return;
 578     }
 579     switch (event->detail) {
 580         case XCB_BUTTON_SCROLL_UP:
 581         case XCB_BUTTON_SCROLL_LEFT:
 582             /* Mouse wheel up. We select the previous ws, if any.
 583              * If there is no more workspace, don’t even send the workspace
 584              * command, otherwise (with workspace auto_back_and_forth) we’d end
 585              * up on the wrong workspace. */
 586             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 587                 return;
 588
 589             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 590             break;
 591         case XCB_BUTTON_SCROLL_DOWN:
 592         case XCB_BUTTON_SCROLL_RIGHT:
 593             /* Mouse wheel down. We select the next ws, if any.
 594              * If there is no more workspace, don’t even send the workspace
 595              * command, otherwise (with workspace auto_back_and_forth) we’d end
 596              * up on the wrong workspace. */
 597             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 598                 return;
 599
 600             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 601             break;
 602         case 1:
 603             cur_ws = clicked_ws;
 604
 605             /* if no workspace was clicked, focus our currently visible
 606              * workspace if it is not already focused */
 607             if (cur_ws == NULL) {
 608                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 609                     if (cur_ws->visible && !cur_ws->focused)
 610                         break;
 611                 }
 612             }
 613
 614             /* if there is nothing to focus, we are done */
 615             if (cur_ws == NULL)
 616                 return;
 617
 618             break;
 619         default:
 620             return;
 621     }
 622
 623     /* To properly handle workspace names with double quotes in them, we need
 624      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 625      * first count the number of double quotes, then we allocate a large enough
 626      * buffer, then we copy character by character. */
 627     int num_quotes = 0;
 628     size_t namelen = 0;
 629     const char *utf8_name = cur_ws->canonical_name;
 630     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 631         if (*walk == '"' || *walk == '\\')
 632             num_quotes++;
 633         /* While we’re looping through the name anyway, we can save one
 634          * strlen(). */
 635         namelen++;
 636     }
 637
 638     const size_t len = namelen + strlen("workspace \"\"") + 1;
 639     char *buffer = scalloc(len + num_quotes, 1);
 640     memcpy(buffer, "workspace \"", strlen("workspace \""));
 641     size_t inpos, outpos;
 642     for (inpos = 0, outpos = strlen("workspace \"");
 643          inpos < namelen;
 644          inpos++, outpos++) {
 645         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 646             buffer[outpos] = '\\';
 647             outpos++;
 648         }
 649         buffer[outpos] = utf8_name[inpos];
 650     }
 651     buffer[outpos] = '"';
 652     i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
 653     free(buffer);
 654 }
 655
 656 /*
 657  * Handle visibility notifications: when none of the bars are visible, e.g.
 658  * if windows are in fullscreen on each output, suspend the child process.
 659  *
 660  */
 661 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 662     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 663     int num_visible = 0;
 664     i3_output *output;
 665
 666     SLIST_FOREACH(output, outputs, slist) {
 667         if (!output->active) {
 668             continue;
 669         }
 670         if (output->bar.id == event->window) {
 671             if (output->visible == visible) {
 672                 return;
 673             }
 674             output->visible = visible;
 675         }
 676         num_visible += output->visible;
 677     }
 678
 679     if (num_visible == 0) {
 680         stop_child();
 681     } else if (num_visible == visible) {
 682         /* Wake the child only when transitioning from 0 to 1 visible bar.
 683          * We cannot transition from 0 to 2 or more visible bars at once since
 684          * visibility events are delivered to each window separately */
 685         cont_child();
 686     }
 687 }
 688
 689 /*
 690  * Adjusts the size of the tray window and alignment of the tray clients by
 691  * configuring their respective x coordinates. To be called when mapping or
 692  * unmapping a tray client window.
 693  *
 694  */
 695 static void configure_trayclients(void) {
 696     trayclient *trayclient;
 697     i3_output *output;
 698     SLIST_FOREACH(output, outputs, slist) {
 699         if (!output->active)
 700             continue;
 701
 702         int clients = 0;
 703         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 704             if (!trayclient->mapped)
 705                 continue;
 706             clients++;
 707
 708             DLOG("Configuring tray window %08x to x=%d\n",
 709                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 710             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 711             xcb_configure_window(xcb_connection,
 712                                  trayclient->win,
 713                                  XCB_CONFIG_WINDOW_X,
 714                                  &x);
 715         }
 716     }
 717 }
 718
 719 /*
 720  * Handles ClientMessages (messages sent from another client directly to us).
 721  *
 722  * At the moment, only the tray window will receive client messages. All
 723  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 724  *
 725  */
 726 static void handle_client_message(xcb_client_message_event_t *event) {
 727     if (event->type == atoms[I3_SYNC]) {
 728         xcb_window_t window = event->data.data32[0];
 729         uint32_t rnd = event->data.data32[1];
 730         /* Forward the request to i3 via the IPC interface so that all pending
 731          * IPC messages are guaranteed to be handled. */
 732         char *payload = NULL;
 733         sasprintf(&payload, "{\"rnd\":%d, \"window\":%d}", rnd, window);
 734         i3_send_msg(I3_IPC_MESSAGE_TYPE_SYNC, payload);
 735         free(payload);
 736     } else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 737                event->format == 32) {
 738         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 739         /* event->data.data32[0] is the timestamp */
 740         uint32_t op = event->data.data32[1];
 741         uint32_t mask;
 742         uint32_t values[2];
 743         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 744             xcb_window_t client = event->data.data32[2];
 745
 746             mask = XCB_CW_EVENT_MASK;
 747
 748             /* Needed to get the most recent value of XEMBED_MAPPED. */
 749             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
 750             /* Needed for UnmapNotify events. */
 751             values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 752             /* Needed because some tray applications (e.g., VLC) use
 753              * override_redirect which causes no ConfigureRequest to be sent. */
 754             values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
 755
 756             xcb_change_window_attributes(xcb_connection, client, mask, values);
 757
 758             /* Request the _XEMBED_INFO property. The XEMBED specification
 759              * (which is referred by the tray specification) says this *has* to
 760              * be set, but VLC does not set it… */
 761             bool map_it = true;
 762             int xe_version = 1;
 763             xcb_get_property_cookie_t xembedc;
 764             xcb_generic_error_t *error;
 765             xembedc = xcb_get_property(xcb_connection,
 766                                        0,
 767                                        client,
 768                                        atoms[_XEMBED_INFO],
 769                                        XCB_GET_PROPERTY_TYPE_ANY,
 770                                        0,
 771                                        2 * 32);
 772
 773             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 774                                                                        xembedc,
 775                                                                        &error);
 776             if (error != NULL) {
 777                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 778                      error->error_code);
 779                 free(error);
 780                 return;
 781             }
 782             if (xembedr != NULL && xembedr->length != 0) {
 783                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 784                 uint32_t *xembed = xcb_get_property_value(xembedr);
 785                 DLOG("xembed version = %d\n", xembed[0]);
 786                 DLOG("xembed flags = %d\n", xembed[1]);
 787                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 788                 xe_version = xembed[0];
 789                 if (xe_version > 1)
 790                     xe_version = 1;
 791                 free(xembedr);
 792             } else {
 793                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 794             }
 795
 796             DLOG("X window %08x requested docking\n", client);
 797
 798             if (output_for_tray == NULL) {
 799                 ELOG("No output found for tray\n");
 800                 return;
 801             }
 802
 803             xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
 804                                                             client,
 805                                                             output_for_tray->bar.id,
 806                                                             output_for_tray->rect.w - icon_size - logical_px(config.tray_padding),
 807                                                             logical_px(config.tray_padding));
 808             if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
 809                 return;
 810
 811             /* We reconfigure the window to use a reasonable size. The systray
 812              * specification explicitly says:
 813              *   Tray icons may be assigned any size by the system tray, and
 814              *   should do their best to cope with any size effectively
 815              */
 816             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 817             values[0] = icon_size;
 818             values[1] = icon_size;
 819             xcb_configure_window(xcb_connection,
 820                                  client,
 821                                  mask,
 822                                  values);
 823
 824             /* send the XEMBED_EMBEDDED_NOTIFY message */
 825             void *event = scalloc(32, 1);
 826             xcb_client_message_event_t *ev = event;
 827             ev->response_type = XCB_CLIENT_MESSAGE;
 828             ev->window = client;
 829             ev->type = atoms[_XEMBED];
 830             ev->format = 32;
 831             ev->data.data32[0] = XCB_CURRENT_TIME;
 832             ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
 833             ev->data.data32[2] = output_for_tray->bar.id;
 834             ev->data.data32[3] = xe_version;
 835             xcb_send_event(xcb_connection,
 836                            0,
 837                            client,
 838                            XCB_EVENT_MASK_NO_EVENT,
 839                            (char *)ev);
 840             free(event);
 841
 842             /* Put the client inside the save set. Upon termination (whether
 843              * killed or normal exit does not matter) of i3bar, these clients
 844              * will be correctly reparented to their most closest living
 845              * ancestor. Without this, tray icons might die when i3bar
 846              * exits/crashes. */
 847             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 848
 849             trayclient *tc = smalloc(sizeof(trayclient));
 850             tc->win = client;
 851             tc->xe_version = xe_version;
 852             tc->mapped = false;
 853             TAILQ_INSERT_TAIL(output_for_tray->trayclients, tc, tailq);
 854
 855             if (map_it) {
 856                 DLOG("Mapping dock client\n");
 857                 xcb_map_window(xcb_connection, client);
 858             } else {
 859                 DLOG("Not mapping dock client yet\n");
 860             }
 861             /* Trigger an update to copy the statusline text to the appropriate
 862              * position */
 863             configure_trayclients();
 864             draw_bars(false);
 865         }
 866     }
 867 }
 868
 869 /*
 870  * Handles DestroyNotify events by removing the tray client from the data
 871  * structure. According to the XEmbed protocol, this is one way for a tray
 872  * client to finish the protocol. After this event is received, there is no
 873  * further interaction with the tray client.
 874  *
 875  * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 876  *
 877  */
 878 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 879     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 880
 881     i3_output *walk;
 882     SLIST_FOREACH(walk, outputs, slist) {
 883         if (!walk->active)
 884             continue;
 885         DLOG("checking output %s\n", walk->name);
 886         trayclient *trayclient;
 887         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 888             if (trayclient->win != event->window) {
 889                 continue;
 890             }
 891
 892             DLOG("Removing tray client with window ID %08x\n", event->window);
 893             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 894             FREE(trayclient);
 895
 896             /* Trigger an update, we now have more space for the statusline */
 897             configure_trayclients();
 898             draw_bars(false);
 899             return;
 900         }
 901     }
 902 }
 903
 904 /*
 905  * Handles MapNotify events. These events happen when a tray client shows its
 906  * window. We respond by realigning the tray clients.
 907  *
 908  */
 909 static void handle_map_notify(xcb_map_notify_event_t *event) {
 910     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 911
 912     i3_output *walk;
 913     SLIST_FOREACH(walk, outputs, slist) {
 914         if (!walk->active)
 915             continue;
 916         DLOG("checking output %s\n", walk->name);
 917         trayclient *trayclient;
 918         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 919             if (trayclient->win != event->window)
 920                 continue;
 921
 922             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 923             trayclient->mapped = true;
 924
 925             /* Trigger an update, we now have more space for the statusline */
 926             configure_trayclients();
 927             draw_bars(false);
 928             return;
 929         }
 930     }
 931 }
 932 /*
 933  * Handles UnmapNotify events. These events happen when a tray client hides its
 934  * window. We respond by realigning the tray clients.
 935  *
 936  */
 937 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 938     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 939
 940     i3_output *walk;
 941     SLIST_FOREACH(walk, outputs, slist) {
 942         if (!walk->active)
 943             continue;
 944         DLOG("checking output %s\n", walk->name);
 945         trayclient *trayclient;
 946         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 947             if (trayclient->win != event->window)
 948                 continue;
 949
 950             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 951             trayclient->mapped = false;
 952
 953             /* Trigger an update, we now have more space for the statusline */
 954             configure_trayclients();
 955             draw_bars(false);
 956             return;
 957         }
 958     }
 959 }
 960
 961 /*
 962  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 963  * handled, which tells us whether a dock client should be mapped or unmapped.
 964  *
 965  */
 966 static void handle_property_notify(xcb_property_notify_event_t *event) {
 967     DLOG("PropertyNotify\n");
 968     if (event->atom == atoms[_XEMBED_INFO] &&
 969         event->state == XCB_PROPERTY_NEW_VALUE) {
 970         DLOG("xembed_info updated\n");
 971         trayclient *trayclient = NULL, *walk;
 972         i3_output *o_walk;
 973         SLIST_FOREACH(o_walk, outputs, slist) {
 974             if (!o_walk->active)
 975                 continue;
 976
 977             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 978                 if (walk->win != event->window)
 979                     continue;
 980                 trayclient = walk;
 981                 break;
 982             }
 983
 984             if (trayclient)
 985                 break;
 986         }
 987         if (!trayclient) {
 988             ELOG("PropertyNotify received for unknown window %08x\n",
 989                  event->window);
 990             return;
 991         }
 992         xcb_get_property_cookie_t xembedc;
 993         xembedc = xcb_get_property_unchecked(xcb_connection,
 994                                              0,
 995                                              trayclient->win,
 996                                              atoms[_XEMBED_INFO],
 997                                              XCB_GET_PROPERTY_TYPE_ANY,
 998                                              0,
 999                                              2 * 32);
1000
1001         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
1002                                                                    xembedc,
1003                                                                    NULL);
1004         if (xembedr == NULL || xembedr->length == 0) {
1005             DLOG("xembed_info unset\n");
1006             return;
1007         }
1008
1009         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
1010         uint32_t *xembed = xcb_get_property_value(xembedr);
1011         DLOG("xembed version = %d\n", xembed[0]);
1012         DLOG("xembed flags = %d\n", xembed[1]);
1013         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
1014         DLOG("map state now %d\n", map_it);
1015         if (trayclient->mapped && !map_it) {
1016             /* need to unmap the window */
1017             xcb_unmap_window(xcb_connection, trayclient->win);
1018         } else if (!trayclient->mapped && map_it) {
1019             /* need to map the window */
1020             xcb_map_window(xcb_connection, trayclient->win);
1021         }
1022         free(xembedr);
1023     }
1024 }
1025
1026 /*
1027  * If a tray client attempts to change its size we deny the request and respond
1028  * by telling it its actual size.
1029  *
1030  */
1031 static void handle_configuration_change(xcb_window_t window) {
1032     trayclient *trayclient;
1033     i3_output *output;
1034     SLIST_FOREACH(output, outputs, slist) {
1035         if (!output->active)
1036             continue;
1037
1038         int clients = 0;
1039         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
1040             if (!trayclient->mapped)
1041                 continue;
1042             clients++;
1043
1044             if (trayclient->win != window)
1045                 continue;
1046
1047             xcb_rectangle_t rect;
1048             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
1049             rect.y = logical_px(config.tray_padding);
1050             rect.width = icon_size;
1051             rect.height = icon_size;
1052
1053             DLOG("This is a tray window. x = %d\n", rect.x);
1054             fake_configure_notify(xcb_connection, rect, window, 0);
1055             return;
1056         }
1057     }
1058
1059     DLOG("WARNING: Could not find corresponding tray window.\n");
1060 }
1061
1062 static void handle_configure_request(xcb_configure_request_event_t *event) {
1063     DLOG("ConfigureRequest for window = %08x\n", event->window);
1064     handle_configuration_change(event->window);
1065 }
1066
1067 static void handle_resize_request(xcb_resize_request_event_t *event) {
1068     DLOG("ResizeRequest for window = %08x\n", event->window);
1069     handle_configuration_change(event->window);
1070 }
1071
1072 /*
1073  * This function is called immediately before the main loop locks. We check for
1074  * events from X11, handle them, then flush our outgoing queue.
1075  *
1076  */
1077 static void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
1078     xcb_generic_event_t *event;
1079
1080     if (xcb_connection_has_error(xcb_connection)) {
1081         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
1082 #ifdef I3_ASAN_ENABLED
1083         __lsan_do_leak_check();
1084 #endif
1085         exit(1);
1086     }
1087
1088     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
1089         if (event->response_type == 0) {
1090             xcb_generic_error_t *error = (xcb_generic_error_t *)event;
1091             DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
1092             free(event);
1093             continue;
1094         }
1095
1096         int type = (event->response_type & ~0x80);
1097
1098         if (type == xkb_base && xkb_base > -1) {
1099             DLOG("received an xkb event\n");
1100
1101             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1102             const uint32_t mod = (config.modifier & 0xFFFF);
1103             const bool new_mod_pressed = (mod != 0 && (state->mods & mod) == mod);
1104             if (new_mod_pressed != mod_pressed) {
1105                 mod_pressed = new_mod_pressed;
1106                 if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
1107                     if (mod_pressed) {
1108                         activated_mode = false;
1109                         unhide_bars();
1110                     } else if (!activated_mode) {
1111                         hide_bars();
1112                     }
1113                 }
1114             }
1115
1116             free(event);
1117             continue;
1118         }
1119
1120         switch (type) {
1121             case XCB_VISIBILITY_NOTIFY:
1122                 /* Visibility change: a bar is [un]obscured by other window */
1123                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1124                 break;
1125             case XCB_EXPOSE:
1126                 if (((xcb_expose_event_t *)event)->count == 0) {
1127                     /* Expose-events happen, when the window needs to be redrawn */
1128                     redraw_bars();
1129                 }
1130
1131                 break;
1132             case XCB_BUTTON_RELEASE:
1133             case XCB_BUTTON_PRESS:
1134                 /* Button press events are mouse buttons clicked on one of our bars */
1135                 handle_button((xcb_button_press_event_t *)event);
1136                 break;
1137             case XCB_CLIENT_MESSAGE:
1138                 /* Client messages are used for client-to-client communication, for
1139                  * example system tray widgets talk to us directly via client messages. */
1140                 handle_client_message((xcb_client_message_event_t *)event);
1141                 break;
1142             case XCB_DESTROY_NOTIFY:
1143                 /* DestroyNotify signifies the end of the XEmbed protocol */
1144                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1145                 break;
1146             case XCB_UNMAP_NOTIFY:
1147                 /* UnmapNotify is received when a tray client hides its window. */
1148                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1149                 break;
1150             case XCB_MAP_NOTIFY:
1151                 handle_map_notify((xcb_map_notify_event_t *)event);
1152                 break;
1153             case XCB_PROPERTY_NOTIFY:
1154                 /* PropertyNotify */
1155                 handle_property_notify((xcb_property_notify_event_t *)event);
1156                 break;
1157             case XCB_CONFIGURE_REQUEST:
1158                 /* ConfigureRequest, sent by a tray child */
1159                 handle_configure_request((xcb_configure_request_event_t *)event);
1160                 break;
1161             case XCB_RESIZE_REQUEST:
1162                 /* ResizeRequest sent by a tray child using override_redirect. */
1163                 handle_resize_request((xcb_resize_request_event_t *)event);
1164                 break;
1165         }
1166         free(event);
1167     }
1168
1169     xcb_flush(xcb_connection);
1170 }
1171
1172 /*
1173  * Dummy callback. We only need this, so that the prepare and check watchers
1174  * are triggered
1175  *
1176  */
1177 static void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1178 }
1179
1180 /*
1181  * Early initialization of the connection to X11: Everything which does not
1182  * depend on 'config'.
1183  *
1184  */
1185 char *init_xcb_early(void) {
1186     /* FIXME: xcb_connect leaks memory */
1187     xcb_connection = xcb_connect(NULL, &screen);
1188     if (xcb_connection_has_error(xcb_connection)) {
1189         ELOG("Cannot open display\n");
1190         exit(EXIT_FAILURE);
1191     }
1192     conn = xcb_connection;
1193     DLOG("Connected to xcb\n");
1194
1195 /* We have to request the atoms we need */
1196 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1197 #include "xcb_atoms.def"
1198
1199     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1200     xcb_root = root_screen->root;
1201
1202     depth = root_screen->root_depth;
1203     colormap = root_screen->default_colormap;
1204     visual_type = get_visualtype(root_screen);
1205
1206     xcb_cursor_context_t *cursor_ctx;
1207     if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) == 0) {
1208         cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
1209         xcb_cursor_context_free(cursor_ctx);
1210     } else {
1211         cursor = xcb_generate_id(xcb_connection);
1212         i3Font cursor_font = load_font("cursor", false);
1213         xcb_create_glyph_cursor(
1214             xcb_connection,
1215             cursor,
1216             cursor_font.specific.xcb.id,
1217             cursor_font.specific.xcb.id,
1218             XCB_CURSOR_LEFT_PTR,
1219             XCB_CURSOR_LEFT_PTR + 1,
1220             0, 0, 0,
1221             65535, 65535, 65535);
1222     }
1223
1224     /* The various watchers to communicate with xcb */
1225     xcb_io = smalloc(sizeof(ev_io));
1226     xcb_prep = smalloc(sizeof(ev_prepare));
1227
1228     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1229     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1230
1231     ev_io_start(main_loop, xcb_io);
1232     ev_prepare_start(main_loop, xcb_prep);
1233
1234     /* Now we get the atoms and save them in a nice data structure */
1235     get_atoms();
1236
1237     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1238
1239     return path;
1240 }
1241
1242 /*
1243  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1244  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1245  * in xcb.
1246  *
1247  */
1248 static void register_xkb_keyevents(void) {
1249     const xcb_query_extension_reply_t *extreply;
1250     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1251     if (!extreply->present) {
1252         ELOG("xkb is not present on this server\n");
1253         exit(EXIT_FAILURE);
1254     }
1255     DLOG("initializing xcb-xkb\n");
1256     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1257     xcb_xkb_select_events(conn,
1258                           XCB_XKB_ID_USE_CORE_KBD,
1259                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1260                           0,
1261                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1262                           0xff,
1263                           0xff,
1264                           NULL);
1265     xkb_base = extreply->first_event;
1266 }
1267
1268 /*
1269  * Deregister from xkb keyevents.
1270  *
1271  */
1272 static void deregister_xkb_keyevents(void) {
1273     xcb_xkb_select_events(conn,
1274                           XCB_XKB_ID_USE_CORE_KBD,
1275                           0,
1276                           0,
1277                           0,
1278                           0xff,
1279                           0xff,
1280                           NULL);
1281 }
1282
1283 /*
1284  * Initialization which depends on 'config' being usable. Called after the
1285  * configuration has arrived.
1286  *
1287  */
1288 void init_xcb_late(char *fontname) {
1289     if (fontname == NULL)
1290         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1291
1292     /* Load the font */
1293     font = load_font(fontname, true);
1294     set_font(&font);
1295     DLOG("Calculated font height: %d\n", font.height);
1296     bar_height = font.height + 2 * logical_px(ws_voff_px);
1297     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1298
1299     if (config.separator_symbol)
1300         separator_symbol_width = predict_text_width(config.separator_symbol);
1301
1302     xcb_flush(xcb_connection);
1303
1304     if (config.hide_on_modifier == M_HIDE)
1305         register_xkb_keyevents();
1306 }
1307
1308 /*
1309  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1310  * selection.
1311  *
1312  */
1313 static void send_tray_clientmessage(void) {
1314     uint8_t buffer[32] = {0};
1315     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1316
1317     ev->response_type = XCB_CLIENT_MESSAGE;
1318     ev->window = xcb_root;
1319     ev->type = atoms[MANAGER];
1320     ev->format = 32;
1321     ev->data.data32[0] = XCB_CURRENT_TIME;
1322     ev->data.data32[1] = tray_reply->atom;
1323     ev->data.data32[2] = selwin;
1324
1325     xcb_send_event(xcb_connection,
1326                    0,
1327                    xcb_root,
1328                    0xFFFFFF,
1329                    (char *)buffer);
1330 }
1331
1332 /*
1333  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1334  * for the X11 display we are running on, then acquiring the selection for this
1335  * atom. Afterwards, tray clients will send ClientMessages to our window.
1336  *
1337  */
1338 static void init_tray(void) {
1339     DLOG("Initializing system tray functionality\n");
1340     /* request the tray manager atom for the X11 display we are running on */
1341     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1342     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1343     xcb_intern_atom_cookie_t tray_cookie;
1344     if (tray_reply == NULL)
1345         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1346
1347     /* tray support: we need a window to own the selection */
1348     selwin = xcb_generate_id(xcb_connection);
1349     uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
1350     uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
1351     xcb_create_window(xcb_connection,
1352                       depth,
1353                       selwin,
1354                       xcb_root,
1355                       -1, -1,
1356                       1, 1,
1357                       0,
1358                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1359                       visual_type->visual_id,
1360                       selmask,
1361                       selval);
1362
1363     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1364     /* set the atoms */
1365     xcb_change_property(xcb_connection,
1366                         XCB_PROP_MODE_REPLACE,
1367                         selwin,
1368                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1369                         XCB_ATOM_CARDINAL,
1370                         32,
1371                         1,
1372                         &orientation);
1373     xcb_change_property(xcb_connection,
1374                         XCB_PROP_MODE_REPLACE,
1375                         selwin,
1376                         atoms[_NET_SYSTEM_TRAY_VISUAL],
1377                         XCB_ATOM_VISUALID,
1378                         32,
1379                         1,
1380                         &visual_type->visual_id);
1381
1382     init_tray_colors();
1383
1384     if (tray_reply == NULL) {
1385         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1386             ELOG("Could not get atom %s\n", atomname);
1387             exit(EXIT_FAILURE);
1388         }
1389     }
1390
1391     xcb_set_selection_owner(xcb_connection,
1392                             selwin,
1393                             tray_reply->atom,
1394                             XCB_CURRENT_TIME);
1395
1396     /* Verify that we have the selection */
1397     xcb_get_selection_owner_cookie_t selcookie;
1398     xcb_get_selection_owner_reply_t *selreply;
1399
1400     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1401     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1402         ELOG("Could not get selection owner for %s\n", atomname);
1403         exit(EXIT_FAILURE);
1404     }
1405
1406     if (selreply->owner != selwin) {
1407         ELOG("Could not set the %s selection. "
1408              "Maybe another tray is already running?\n",
1409              atomname);
1410         /* NOTE that this error is not fatal. We just can’t provide tray
1411          * functionality */
1412         free(selreply);
1413         return;
1414     }
1415
1416     free(selreply);
1417
1418     send_tray_clientmessage();
1419 }
1420
1421 /*
1422  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1423  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1424  * they assume a light background.
1425  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1426  *
1427  */
1428 void init_tray_colors(void) {
1429     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1430     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1431
1432     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1433
1434     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1435                             {bar_fg[3], bar_fg[4], '\0'},
1436                             {bar_fg[5], bar_fg[6], '\0'}};
1437     const uint8_t r = strtol(strgroups[0], NULL, 16);
1438     const uint8_t g = strtol(strgroups[1], NULL, 16);
1439     const uint8_t b = strtol(strgroups[2], NULL, 16);
1440
1441     const uint16_t r16 = ((uint16_t)r << 8) | r;
1442     const uint16_t g16 = ((uint16_t)g << 8) | g;
1443     const uint16_t b16 = ((uint16_t)b << 8) | b;
1444
1445     const uint32_t tray_colors[12] = {
1446         r16, g16, b16, /* foreground color */
1447         r16, g16, b16, /* error color */
1448         r16, g16, b16, /* warning color */
1449         r16, g16, b16, /* success color */
1450     };
1451
1452     xcb_change_property(xcb_connection,
1453                         XCB_PROP_MODE_REPLACE,
1454                         selwin,
1455                         atoms[_NET_SYSTEM_TRAY_COLORS],
1456                         XCB_ATOM_CARDINAL,
1457                         32,
1458                         12,
1459                         tray_colors);
1460 }
1461
1462 /*
1463  * Cleanup the xcb stuff.
1464  * Called once, before the program terminates.
1465  *
1466  */
1467 void clean_xcb(void) {
1468     free_outputs();
1469
1470     free_font();
1471
1472     xcb_free_cursor(xcb_connection, cursor);
1473     xcb_flush(xcb_connection);
1474     xcb_aux_sync(xcb_connection);
1475     xcb_disconnect(xcb_connection);
1476
1477     ev_prepare_stop(main_loop, xcb_prep);
1478     ev_io_stop(main_loop, xcb_io);
1479
1480     FREE(xcb_prep);
1481     FREE(xcb_io);
1482 }
1483
1484 /*
1485  * Get the earlier requested atoms and save them in the prepared data structure
1486  *
1487  */
1488 void get_atoms(void) {
1489     xcb_intern_atom_reply_t *reply;
1490 #define ATOM_DO(name)                                                        \
1491     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1492     if (reply == NULL) {                                                     \
1493         ELOG("Could not get atom %s\n", #name);                              \
1494         exit(EXIT_FAILURE);                                                  \
1495     }                                                                        \
1496     atoms[name] = reply->atom;                                               \
1497     free(reply);
1498
1499 #include "xcb_atoms.def"
1500     DLOG("Got atoms\n");
1501 }
1502
1503 /*
1504  * Reparents all tray clients of the specified output to the root window. This
1505  * is either used when shutting down, when an output appears (xrandr --output
1506  * VGA1 --off) or when the primary output changes.
1507  *
1508  * Applications using the tray will start the protocol from the beginning again
1509  * afterwards.
1510  *
1511  */
1512 void kick_tray_clients(i3_output *output) {
1513     if (TAILQ_EMPTY(output->trayclients))
1514         return;
1515
1516     trayclient *trayclient;
1517     while (!TAILQ_EMPTY(output->trayclients)) {
1518         trayclient = TAILQ_FIRST(output->trayclients);
1519         /* Unmap, then reparent (to root) the tray client windows */
1520         xcb_unmap_window(xcb_connection, trayclient->win);
1521         xcb_reparent_window(xcb_connection,
1522                             trayclient->win,
1523                             xcb_root,
1524                             0,
1525                             0);
1526
1527         /* We remove the trayclient right here. We might receive an UnmapNotify
1528          * event afterwards, but better safe than sorry. */
1529         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1530         FREE(trayclient);
1531     }
1532
1533     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1534      * We cannot actually destroy the window because then Qt will not restore
1535      * its event mask on the new window. */
1536     uint8_t buffer[32] = {0};
1537     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1538
1539     event->response_type = XCB_DESTROY_NOTIFY;
1540     event->event = selwin;
1541     event->window = selwin;
1542
1543     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1544
1545     send_tray_clientmessage();
1546 }
1547
1548 /*
1549  * Destroy the bar of the specified output
1550  *
1551  */
1552 void destroy_window(i3_output *output) {
1553     if (output == NULL) {
1554         return;
1555     }
1556     if (output->bar.id == XCB_NONE) {
1557         return;
1558     }
1559
1560     kick_tray_clients(output);
1561     xcb_destroy_window(xcb_connection, output->bar.id);
1562     output->bar.id = XCB_NONE;
1563 }
1564
1565 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1566  * by the `position` bar config directive. */
1567 static xcb_void_cookie_t config_strut_partial(i3_output *output) {
1568     /* A local struct to save the strut_partial property */
1569     struct {
1570         uint32_t left;
1571         uint32_t right;
1572         uint32_t top;
1573         uint32_t bottom;
1574         uint32_t left_start_y;
1575         uint32_t left_end_y;
1576         uint32_t right_start_y;
1577         uint32_t right_end_y;
1578         uint32_t top_start_x;
1579         uint32_t top_end_x;
1580         uint32_t bottom_start_x;
1581         uint32_t bottom_end_x;
1582     } __attribute__((__packed__)) strut_partial;
1583     memset(&strut_partial, 0, sizeof(strut_partial));
1584
1585     switch (config.position) {
1586         case POS_NONE:
1587             break;
1588         case POS_TOP:
1589             strut_partial.top = bar_height;
1590             strut_partial.top_start_x = output->rect.x;
1591             strut_partial.top_end_x = output->rect.x + output->rect.w;
1592             break;
1593         case POS_BOT:
1594             strut_partial.bottom = bar_height;
1595             strut_partial.bottom_start_x = output->rect.x;
1596             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1597             break;
1598     }
1599     return xcb_change_property(xcb_connection,
1600                                XCB_PROP_MODE_REPLACE,
1601                                output->bar.id,
1602                                atoms[_NET_WM_STRUT_PARTIAL],
1603                                XCB_ATOM_CARDINAL,
1604                                32,
1605                                12,
1606                                &strut_partial);
1607 }
1608
1609 /*
1610  * Returns the output which should hold the tray, if one exists.
1611  *
1612  * An output is returned in these scenarios:
1613  *   1. A specific output was listed in tray_outputs which is also in the list
1614  *   of outputs managed by this bar.
1615  *   2. No tray_output directive was specified. In this case, we use the first
1616  *   available output.
1617  *   3. 'tray_output primary' was specified. In this case we use the primary
1618  *   output.
1619  *
1620  * Three scenarios in which we specifically don't want to use a tray:
1621  *   1. 'tray_output none' was specified.
1622  *   2. A specific output was listed as a tray_output, but is not one of the
1623  *   outputs managed by this bar. For example, consider tray_outputs == [VGA-1],
1624  *   but outputs == [HDMI-1].
1625  *   3. 'tray_output primary' was specified and no output in the list is
1626  *   primary.
1627  */
1628 static i3_output *get_tray_output(void) {
1629     i3_output *output = NULL;
1630     if (TAILQ_EMPTY(&(config.tray_outputs))) {
1631         /* No tray_output specified, use first active output. */
1632         SLIST_FOREACH(output, outputs, slist) {
1633             if (output->active) {
1634                 return output;
1635             }
1636         }
1637         return NULL;
1638     } else if (strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0) {
1639         /* Check for "tray_output none" */
1640         return NULL;
1641     }
1642
1643     /* If one or more tray_output assignments were specified, we ensure that at
1644      * least one of them is actually an output managed by this instance. */
1645     tray_output_t *tray_output;
1646     TAILQ_FOREACH(tray_output, &(config.tray_outputs), tray_outputs) {
1647         SLIST_FOREACH(output, outputs, slist) {
1648             if (output->active &&
1649                 (strcasecmp(output->name, tray_output->output) == 0 ||
1650                  (strcasecmp(tray_output->output, "primary") == 0 && output->primary))) {
1651                 return output;
1652             }
1653         }
1654     }
1655
1656     return NULL;
1657 }
1658
1659 /*
1660  * Reconfigure all bars and create new bars for recently activated outputs
1661  *
1662  */
1663 void reconfig_windows(bool redraw_bars) {
1664     uint32_t mask;
1665     uint32_t values[6];
1666
1667     i3_output *walk;
1668     SLIST_FOREACH(walk, outputs, slist) {
1669         if (!walk->active) {
1670             /* If an output is not active, we destroy its bar */
1671             /* FIXME: Maybe we rather want to unmap? */
1672             DLOG("Destroying window for output %s\n", walk->name);
1673             destroy_window(walk);
1674             continue;
1675         }
1676         if (walk->bar.id == XCB_NONE) {
1677             DLOG("Creating window for output %s\n", walk->name);
1678
1679             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1680             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1681             xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
1682             mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
1683
1684             values[0] = colors.bar_bg.colorpixel;
1685             values[1] = root_screen->black_pixel;
1686             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1687             values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1688             /* We enable the following EventMask fields:
1689              * EXPOSURE, to get expose events (we have to re-draw then)
1690              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1691              *                        child windows use ConfigureWindow
1692              * BUTTON_PRESS, to handle clicks on the workspace buttons
1693              * */
1694             values[3] = XCB_EVENT_MASK_EXPOSURE |
1695                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1696                         XCB_EVENT_MASK_BUTTON_PRESS |
1697                         XCB_EVENT_MASK_BUTTON_RELEASE;
1698             if (config.hide_on_modifier == M_DOCK) {
1699                 /* If the bar is normally visible, catch visibility change events to suspend
1700                  * the status process when the bar is obscured by full-screened windows.  */
1701                 values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1702                 walk->visible = true;
1703             }
1704             values[4] = colormap;
1705             values[5] = cursor;
1706
1707             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1708                                                                      depth,
1709                                                                      bar_id,
1710                                                                      xcb_root,
1711                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1712                                                                      walk->rect.w, bar_height,
1713                                                                      0,
1714                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1715                                                                      visual_type->visual_id,
1716                                                                      mask,
1717                                                                      values);
1718
1719             /* The double-buffer we use to render stuff off-screen */
1720             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1721                                                                     depth,
1722                                                                     buffer_id,
1723                                                                     bar_id,
1724                                                                     walk->rect.w,
1725                                                                     bar_height);
1726
1727             /* The double-buffer we use to render the statusline before copying to buffer */
1728             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1729                                                                       depth,
1730                                                                       statusline_buffer_id,
1731                                                                       bar_id,
1732                                                                       walk->rect.w,
1733                                                                       bar_height);
1734
1735             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1736             xcb_void_cookie_t class_cookie;
1737             class_cookie = xcb_change_property(xcb_connection,
1738                                                XCB_PROP_MODE_REPLACE,
1739                                                bar_id,
1740                                                XCB_ATOM_WM_CLASS,
1741                                                XCB_ATOM_STRING,
1742                                                8,
1743                                                (strlen("i3bar") + 1) * 2,
1744                                                "i3bar\0i3bar\0");
1745
1746             char *name;
1747             sasprintf(&name, "i3bar for output %s", walk->name);
1748             xcb_void_cookie_t name_cookie;
1749             name_cookie = xcb_change_property(xcb_connection,
1750                                               XCB_PROP_MODE_REPLACE,
1751                                               bar_id,
1752                                               XCB_ATOM_WM_NAME,
1753                                               XCB_ATOM_STRING,
1754                                               8,
1755                                               strlen(name),
1756                                               name);
1757             free(name);
1758
1759             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1760              * this one */
1761             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1762                                                                 XCB_PROP_MODE_REPLACE,
1763                                                                 bar_id,
1764                                                                 atoms[_NET_WM_WINDOW_TYPE],
1765                                                                 XCB_ATOM_ATOM,
1766                                                                 32,
1767                                                                 1,
1768                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1769
1770             draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
1771             draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
1772             draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
1773
1774             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1775
1776             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1777             xcb_void_cookie_t map_cookie;
1778             if (config.hide_on_modifier == M_DOCK) {
1779                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1780             }
1781
1782             if (xcb_request_failed(win_cookie, "Could not create window") ||
1783                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1784                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1785                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1786                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1787                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1788                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1789                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1790                 exit(EXIT_FAILURE);
1791             }
1792
1793         } else {
1794             /* We already have a bar, so we just reconfigure it */
1795             mask = XCB_CONFIG_WINDOW_X |
1796                    XCB_CONFIG_WINDOW_Y |
1797                    XCB_CONFIG_WINDOW_WIDTH |
1798                    XCB_CONFIG_WINDOW_HEIGHT |
1799                    XCB_CONFIG_WINDOW_STACK_MODE;
1800             values[0] = walk->rect.x;
1801             if (config.position == POS_TOP)
1802                 values[1] = walk->rect.y;
1803             else
1804                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1805             values[2] = walk->rect.w;
1806             values[3] = bar_height;
1807             values[4] = XCB_STACK_MODE_ABOVE;
1808
1809             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1810             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1811
1812             DLOG("Destroying buffer for output %s\n", walk->name);
1813             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1814
1815             DLOG("Destroying statusline buffer for output %s\n", walk->name);
1816             xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
1817
1818             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1819             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1820                                                                         walk->bar.id,
1821                                                                         mask,
1822                                                                         values);
1823
1824             mask = XCB_CW_OVERRIDE_REDIRECT;
1825             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1826             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1827             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1828                                                                         walk->bar.id,
1829                                                                         mask,
1830                                                                         values);
1831
1832             DLOG("Recreating buffer for output %s\n", walk->name);
1833             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1834                                                                     depth,
1835                                                                     walk->buffer.id,
1836                                                                     walk->bar.id,
1837                                                                     walk->rect.w,
1838                                                                     bar_height);
1839
1840             DLOG("Recreating statusline buffer for output %s\n", walk->name);
1841             xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
1842                                                                       depth,
1843                                                                       walk->statusline_buffer.id,
1844                                                                       walk->bar.id,
1845                                                                       walk->rect.w,
1846                                                                       bar_height);
1847
1848             draw_util_surface_free(xcb_connection, &(walk->bar));
1849             draw_util_surface_free(xcb_connection, &(walk->buffer));
1850             draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
1851             draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
1852             draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
1853             draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
1854
1855             xcb_void_cookie_t map_cookie, umap_cookie;
1856             if (redraw_bars) {
1857                 /* Unmap the window, and draw it again when in dock mode */
1858                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1859                 if (config.hide_on_modifier == M_DOCK) {
1860                     cont_child();
1861                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1862                 } else {
1863                     stop_child();
1864                 }
1865
1866                 if (config.hide_on_modifier == M_HIDE) {
1867                     /* Switching to hide mode, register for keyevents */
1868                     register_xkb_keyevents();
1869                 } else {
1870                     /* Switching to dock/invisible mode, deregister from keyevents */
1871                     deregister_xkb_keyevents();
1872                 }
1873             }
1874
1875             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1876                 xcb_request_failed(chg_cookie, "Could not change window") ||
1877                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1878                 xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
1879                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1880                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1881                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1882                 exit(EXIT_FAILURE);
1883             }
1884         }
1885     }
1886
1887     /* Finally, check if we want to initialize the tray or destroy the selection
1888      * window. The result of get_tray_output() is cached. */
1889     output_for_tray = get_tray_output();
1890     if (output_for_tray) {
1891         if (selwin == XCB_NONE) {
1892             init_tray();
1893         }
1894     } else if (selwin != XCB_NONE) {
1895         DLOG("Destroying tray selection window\n");
1896         xcb_destroy_window(xcb_connection, selwin);
1897         selwin = XCB_NONE;
1898     }
1899 }
1900
1901 /*
1902  * Render the bars, with buttons and statusline
1903  *
1904  */
1905 void draw_bars(bool unhide) {
1906     DLOG("Drawing bars...\n");
1907
1908     uint32_t full_statusline_width = predict_statusline_length(false);
1909     uint32_t short_statusline_width = predict_statusline_length(true);
1910
1911     i3_output *outputs_walk;
1912     SLIST_FOREACH(outputs_walk, outputs, slist) {
1913         int workspace_width = 0;
1914
1915         if (!outputs_walk->active) {
1916             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1917             continue;
1918         }
1919         if (outputs_walk->bar.id == XCB_NONE) {
1920             /* Oh shit, an active output without an own bar. Create it now! */
1921             reconfig_windows(false);
1922         }
1923
1924         bool use_focus_colors = output_has_focus(outputs_walk);
1925
1926         /* First things first: clear the backbuffer */
1927         draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
1928
1929         if (!config.disable_ws) {
1930             i3_ws *ws_walk;
1931             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1932                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1933                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1934                 color_t fg_color = colors.inactive_ws_fg;
1935                 color_t bg_color = colors.inactive_ws_bg;
1936                 color_t border_color = colors.inactive_ws_border;
1937                 if (ws_walk->visible) {
1938                     if (!ws_walk->focused) {
1939                         fg_color = colors.active_ws_fg;
1940                         bg_color = colors.active_ws_bg;
1941                         border_color = colors.active_ws_border;
1942                     } else {
1943                         fg_color = colors.focus_ws_fg;
1944                         bg_color = colors.focus_ws_bg;
1945                         border_color = colors.focus_ws_border;
1946                     }
1947                 }
1948                 if (ws_walk->urgent) {
1949                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1950                     fg_color = colors.urgent_ws_fg;
1951                     bg_color = colors.urgent_ws_bg;
1952                     border_color = colors.urgent_ws_border;
1953                     unhide = true;
1954                 }
1955
1956                 /* Draw the border of the button. */
1957                 draw_util_rectangle(&(outputs_walk->buffer), border_color,
1958                                     workspace_width,
1959                                     logical_px(1),
1960                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1961                                     font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1962
1963                 /* Draw the inside of the button. */
1964                 draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1965                                     workspace_width + logical_px(1),
1966                                     2 * logical_px(1),
1967                                     ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1968                                     font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1969
1970                 draw_util_text(ws_walk->name, &(outputs_walk->buffer), fg_color, bg_color,
1971                                workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1972                                logical_px(ws_voff_px),
1973                                ws_walk->name_width);
1974
1975                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1976                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1977                     workspace_width += logical_px(ws_spacing_px);
1978             }
1979         }
1980
1981         if (binding.name && !config.disable_binding_mode_indicator) {
1982             workspace_width += logical_px(ws_spacing_px);
1983
1984             color_t fg_color = colors.binding_mode_fg;
1985             color_t bg_color = colors.binding_mode_bg;
1986
1987             draw_util_rectangle(&(outputs_walk->buffer), colors.binding_mode_border,
1988                                 workspace_width,
1989                                 logical_px(1),
1990                                 binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1991                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1992
1993             draw_util_rectangle(&(outputs_walk->buffer), bg_color,
1994                                 workspace_width + logical_px(1),
1995                                 2 * logical_px(1),
1996                                 binding.width + 2 * logical_px(ws_hoff_px),
1997                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1998
1999             draw_util_text(binding.name, &(outputs_walk->buffer), fg_color, bg_color,
2000                            workspace_width + logical_px(ws_hoff_px) + logical_px(1),
2001                            logical_px(ws_voff_px),
2002                            binding.width);
2003
2004             unhide = true;
2005             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
2006         }
2007
2008         if (!TAILQ_EMPTY(&statusline_head)) {
2009             DLOG("Printing statusline!\n");
2010
2011             int tray_width = get_tray_width(outputs_walk->trayclients);
2012             uint32_t hoff = logical_px(((workspace_width > 0) + (tray_width > 0)) * sb_hoff_px);
2013             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - hoff;
2014             uint32_t clip_left = 0;
2015             uint32_t statusline_width = full_statusline_width;
2016             bool use_short_text = false;
2017
2018             if (statusline_width > max_statusline_width) {
2019                 statusline_width = short_statusline_width;
2020                 use_short_text = true;
2021                 if (statusline_width > max_statusline_width) {
2022                     clip_left = statusline_width - max_statusline_width;
2023                 }
2024             }
2025
2026             int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
2027             int x_dest = outputs_walk->rect.w - tray_width - logical_px((tray_width > 0) * sb_hoff_px) - visible_statusline_width;
2028
2029             draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
2030             draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
2031                                    x_dest, 0, visible_statusline_width, (int16_t)bar_height);
2032
2033             outputs_walk->statusline_width = statusline_width;
2034             outputs_walk->statusline_short_text = use_short_text;
2035         }
2036     }
2037
2038     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
2039     if (mod_pressed ||
2040         config.hidden_state == S_SHOW ||
2041         unhide) {
2042         unhide_bars();
2043     } else if (config.hide_on_modifier == M_HIDE) {
2044         hide_bars();
2045     }
2046
2047     redraw_bars();
2048 }
2049
2050 /*
2051  * Redraw the bars, i.e. simply copy the buffer to the barwindow
2052  *
2053  */
2054 void redraw_bars(void) {
2055     i3_output *outputs_walk;
2056     SLIST_FOREACH(outputs_walk, outputs, slist) {
2057         if (!outputs_walk->active) {
2058             continue;
2059         }
2060
2061         draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
2062                                0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
2063         xcb_flush(xcb_connection);
2064     }
2065 }
2066
2067 /*
2068  * Set the current binding mode
2069  *
2070  */
2071 void set_current_mode(struct mode *current) {
2072     I3STRING_FREE(binding.name);
2073     binding = *current;
2074     activated_mode = binding.name != NULL;
2075 }