git.sur5r.net Git - i3/i3/blob - i3bar/src/xcb.c

   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 <xcb/xcb.h>
  11 #include <xcb/xkb.h>
  12 #include <xcb/xproto.h>
  13 #include <xcb/xcb_aux.h>
  14
  15 #ifdef XCB_COMPAT
  16 #include "xcb_compat.h"
  17 #endif
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <i3/ipc.h>
  25 #include <ev.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <err.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/XKBlib.h>
  32 #include <X11/extensions/XKB.h>
  33 #include <cairo/cairo-xcb.h>
  34
  35 #include "common.h"
  36 #include "libi3.h"
  37
  38 /* We save the atoms in an easy to access array, indexed by an enum */
  39 enum {
  40 #define ATOM_DO(name) name,
  41 #include "xcb_atoms.def"
  42     NUM_ATOMS
  43 };
  44
  45 xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  46 xcb_atom_t atoms[NUM_ATOMS];
  47
  48 /* Variables, that are the same for all functions at all times */
  49 xcb_connection_t *xcb_connection;
  50 int screen;
  51 xcb_screen_t *root_screen;
  52 xcb_window_t xcb_root;
  53
  54 /* selection window for tray support */
  55 static xcb_window_t selwin = XCB_NONE;
  56 static xcb_intern_atom_reply_t *tray_reply = NULL;
  57
  58 /* This is needed for integration with libi3 */
  59 xcb_connection_t *conn;
  60
  61 /* The font we'll use */
  62 static i3Font font;
  63
  64 /* Icon size (based on font size) */
  65 int icon_size;
  66
  67 /* Overall height of the bar (based on font size) */
  68 int bar_height;
  69
  70 /* These are only relevant for XKB, which we only need for grabbing modifiers */
  71 int xkb_base;
  72 int mod_pressed = 0;
  73
  74 /* Because the statusline is the same on all outputs, we have
  75  * global buffer to render it on */
  76 surface_t statusline_surface;
  77 uint32_t statusline_width;
  78
  79 /* Event watchers, to interact with the user */
  80 ev_prepare *xcb_prep;
  81 ev_check *xcb_chk;
  82 ev_io *xcb_io;
  83 ev_io *xkb_io;
  84
  85 /* The name of current binding mode */
  86 static mode binding;
  87
  88 /* Indicates whether a new binding mode was recently activated */
  89 bool activated_mode = false;
  90
  91 /* The parsed colors */
  92 struct xcb_colors_t {
  93     color_t bar_fg;
  94     color_t bar_bg;
  95     color_t sep_fg;
  96     color_t active_ws_fg;
  97     color_t active_ws_bg;
  98     color_t active_ws_border;
  99     color_t inactive_ws_fg;
 100     color_t inactive_ws_bg;
 101     color_t inactive_ws_border;
 102     color_t urgent_ws_bg;
 103     color_t urgent_ws_fg;
 104     color_t urgent_ws_border;
 105     color_t focus_ws_bg;
 106     color_t focus_ws_fg;
 107     color_t focus_ws_border;
 108     color_t binding_mode_bg;
 109     color_t binding_mode_fg;
 110     color_t binding_mode_border;
 111 };
 112 struct xcb_colors_t colors;
 113
 114 /* Horizontal offset between a workspace label and button borders */
 115 static const int ws_hoff_px = 4;
 116
 117 /* Vertical offset between a workspace label and button borders */
 118 static const int ws_voff_px = 3;
 119
 120 /* Offset between two workspace buttons */
 121 static const int ws_spacing_px = 1;
 122
 123 /* Offset between the statusline and 1) workspace buttons on the left
 124  *                                   2) the tray or screen edge on the right */
 125 static const int sb_hoff_px = 4;
 126
 127 /* Additional offset between the tray and the statusline, if the tray is not empty */
 128 static const int tray_loff_px = 2;
 129
 130 /* Vertical offset between the bar and a separator */
 131 static const int sep_voff_px = 4;
 132
 133 int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
 134     xcb_generic_error_t *err;
 135     if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
 136         fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
 137         return err->error_code;
 138     }
 139     return 0;
 140 }
 141
 142 uint32_t get_sep_offset(struct status_block *block) {
 143     if (!block->no_separator && block->sep_block_width > 0)
 144         return block->sep_block_width / 2 + block->sep_block_width % 2;
 145     return 0;
 146 }
 147
 148 int get_tray_width(struct tc_head *trayclients) {
 149     trayclient *trayclient;
 150     int tray_width = 0;
 151     TAILQ_FOREACH_REVERSE(trayclient, trayclients, tc_head, tailq) {
 152         if (!trayclient->mapped)
 153             continue;
 154         tray_width += icon_size + logical_px(config.tray_padding);
 155     }
 156     if (tray_width > 0)
 157         tray_width += logical_px(tray_loff_px);
 158     return tray_width;
 159 }
 160
 161 /*
 162  * Draws a separator for the given block if necessary.
 163  *
 164  */
 165 static void draw_separator(uint32_t x, struct status_block *block) {
 166     uint32_t sep_offset = get_sep_offset(block);
 167     if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
 168         return;
 169
 170     uint32_t center_x = x - sep_offset;
 171     if (config.separator_symbol == NULL) {
 172         /* Draw a classic one pixel, vertical separator. */
 173         cairo_set_source_color(&statusline_surface, colors.sep_fg);
 174         cairo_rectangle(statusline_surface.cr, center_x, logical_px(sep_voff_px), logical_px(1), bar_height - 2 * logical_px(sep_voff_px));
 175         cairo_fill(statusline_surface.cr);
 176     } else {
 177         /* Draw a custom separator. */
 178         uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
 179         set_font_colors(statusline_surface.gc, colors.sep_fg.colorpixel, colors.bar_bg.colorpixel);
 180         draw_text(config.separator_symbol, statusline_surface.id, statusline_surface.gc,
 181                   separator_x, logical_px(ws_voff_px), x - separator_x);
 182     }
 183 }
 184
 185 /*
 186  * Redraws the statusline to the buffer
 187  *
 188  */
 189 void refresh_statusline(bool use_short_text) {
 190     struct status_block *block;
 191
 192     uint32_t old_statusline_width = statusline_width;
 193     statusline_width = 0;
 194
 195     /* Predict the text width of all blocks (in pixels). */
 196     TAILQ_FOREACH(block, &statusline_head, blocks) {
 197         /* Try to use the shorter text if necessary and possible. */
 198         if (use_short_text && block->short_text != NULL) {
 199             I3STRING_FREE(block->full_text);
 200             block->full_text = i3string_copy(block->short_text);
 201         }
 202
 203         if (i3string_get_num_bytes(block->full_text) == 0)
 204             continue;
 205
 206         block->width = predict_text_width(block->full_text);
 207
 208         /* Compute offset and append for text aligment in min_width. */
 209         if (block->min_width <= block->width) {
 210             block->x_offset = 0;
 211             block->x_append = 0;
 212         } else {
 213             uint32_t padding_width = block->min_width - block->width;
 214             switch (block->align) {
 215                 case ALIGN_LEFT:
 216                     block->x_append = padding_width;
 217                     break;
 218                 case ALIGN_RIGHT:
 219                     block->x_offset = padding_width;
 220                     break;
 221                 case ALIGN_CENTER:
 222                     block->x_offset = padding_width / 2;
 223                     block->x_append = padding_width / 2 + padding_width % 2;
 224                     break;
 225             }
 226         }
 227
 228         /* If this is not the last block, add some pixels for a separator. */
 229         if (TAILQ_NEXT(block, blocks) != NULL)
 230             statusline_width += block->sep_block_width;
 231
 232         statusline_width += block->width + block->x_offset + block->x_append;
 233     }
 234
 235     /* If the statusline is bigger than our screen we need to make sure that
 236      * the pixmap provides enough space, so re-allocate if the width grew */
 237     if (statusline_width > root_screen->width_in_pixels &&
 238         statusline_width > old_statusline_width)
 239         realloc_sl_buffer();
 240
 241     /* Clear the statusline pixmap. */
 242     cairo_set_source_color(&statusline_surface, colors.bar_bg);
 243     cairo_rectangle(statusline_surface.cr, 0, 0, MAX(root_screen->width_in_pixels, statusline_width), bar_height);
 244     cairo_fill(statusline_surface.cr);
 245
 246     /* Draw the text of each block. */
 247     uint32_t x = 0;
 248     TAILQ_FOREACH(block, &statusline_head, blocks) {
 249         if (i3string_get_num_bytes(block->full_text) == 0)
 250             continue;
 251         color_t fg_color;
 252
 253         /* If this block is urgent, draw it with the defined color and border. */
 254         if (block->urgent) {
 255             fg_color = colors.urgent_ws_fg;
 256
 257             /* Draw the background */
 258             cairo_set_source_color(&statusline_surface, colors.urgent_ws_bg);
 259             cairo_rectangle(statusline_surface.cr, x - logical_px(2), logical_px(1), block->width + logical_px(4), bar_height - logical_px(2));
 260             cairo_fill(statusline_surface.cr);
 261         } else {
 262             fg_color = (block->color ? cairo_hex_to_color(block->color) : colors.bar_fg);
 263         }
 264
 265         set_font_colors(statusline_surface.gc, fg_color.colorpixel, colors.bar_bg.colorpixel);
 266         draw_text(block->full_text, statusline_surface.id, statusline_surface.gc, x + block->x_offset, logical_px(ws_voff_px), block->width);
 267         x += block->width + block->sep_block_width + block->x_offset + block->x_append;
 268
 269         /* If this is not the last block, draw a separator. */
 270         draw_separator(x, block);
 271     }
 272 }
 273
 274 /*
 275  * Hides all bars (unmaps them)
 276  *
 277  */
 278 void hide_bars(void) {
 279     if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
 280         return;
 281     }
 282
 283     i3_output *walk;
 284     SLIST_FOREACH(walk, outputs, slist) {
 285         if (!walk->active) {
 286             continue;
 287         }
 288         xcb_unmap_window(xcb_connection, walk->bar.id);
 289     }
 290     stop_child();
 291 }
 292
 293 /*
 294  * Unhides all bars (maps them)
 295  *
 296  */
 297 void unhide_bars(void) {
 298     if (config.hide_on_modifier != M_HIDE) {
 299         return;
 300     }
 301
 302     i3_output *walk;
 303     xcb_void_cookie_t cookie;
 304     uint32_t mask;
 305     uint32_t values[5];
 306
 307     cont_child();
 308
 309     SLIST_FOREACH(walk, outputs, slist) {
 310         if (walk->bar.id == XCB_NONE) {
 311             continue;
 312         }
 313         mask = XCB_CONFIG_WINDOW_X |
 314                XCB_CONFIG_WINDOW_Y |
 315                XCB_CONFIG_WINDOW_WIDTH |
 316                XCB_CONFIG_WINDOW_HEIGHT |
 317                XCB_CONFIG_WINDOW_STACK_MODE;
 318         values[0] = walk->rect.x;
 319         if (config.position == POS_TOP)
 320             values[1] = walk->rect.y;
 321         else
 322             values[1] = walk->rect.y + walk->rect.h - bar_height;
 323         values[2] = walk->rect.w;
 324         values[3] = bar_height;
 325         values[4] = XCB_STACK_MODE_ABOVE;
 326         DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
 327         cookie = xcb_configure_window_checked(xcb_connection,
 328                                               walk->bar.id,
 329                                               mask,
 330                                               values);
 331
 332         if (xcb_request_failed(cookie, "Could not reconfigure window")) {
 333             exit(EXIT_FAILURE);
 334         }
 335         xcb_map_window(xcb_connection, walk->bar.id);
 336     }
 337 }
 338
 339 /*
 340  * Parse the colors into a format that we can use
 341  *
 342  */
 343 void init_colors(const struct xcb_color_strings_t *new_colors) {
 344 #define PARSE_COLOR(name, def)                                                       \
 345     do {                                                                             \
 346         colors.name = cairo_hex_to_color(new_colors->name ? new_colors->name : def); \
 347     } while (0)
 348     PARSE_COLOR(bar_fg, "#FFFFFF");
 349     PARSE_COLOR(bar_bg, "#000000");
 350     PARSE_COLOR(sep_fg, "#666666");
 351     PARSE_COLOR(active_ws_fg, "#FFFFFF");
 352     PARSE_COLOR(active_ws_bg, "#333333");
 353     PARSE_COLOR(active_ws_border, "#333333");
 354     PARSE_COLOR(inactive_ws_fg, "#888888");
 355     PARSE_COLOR(inactive_ws_bg, "#222222");
 356     PARSE_COLOR(inactive_ws_border, "#333333");
 357     PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
 358     PARSE_COLOR(urgent_ws_bg, "#900000");
 359     PARSE_COLOR(urgent_ws_border, "#2f343a");
 360     PARSE_COLOR(focus_ws_fg, "#FFFFFF");
 361     PARSE_COLOR(focus_ws_bg, "#285577");
 362     PARSE_COLOR(focus_ws_border, "#4c7899");
 363 #undef PARSE_COLOR
 364
 365 #define PARSE_COLOR_FALLBACK(name, fallback)                                                     \
 366     do {                                                                                         \
 367         colors.name = new_colors->name ? cairo_hex_to_color(new_colors->name) : colors.fallback; \
 368     } while (0)
 369
 370     /* For the binding mode indicator colors, we don't hardcode a default.
 371      * Instead, we fall back to urgent_ws_* colors. */
 372     PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
 373     PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
 374     PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
 375 #undef PARSE_COLOR_FALLBACK
 376
 377     init_tray_colors();
 378     xcb_flush(xcb_connection);
 379 }
 380
 381 /*
 382  * Handle a button press event (i.e. a mouse click on one of our bars).
 383  * We determine, whether the click occured on a workspace button or if the scroll-
 384  * wheel was used and change the workspace appropriately
 385  *
 386  */
 387 void handle_button(xcb_button_press_event_t *event) {
 388     /* Determine, which bar was clicked */
 389     i3_output *walk;
 390     xcb_window_t bar = event->event;
 391     SLIST_FOREACH(walk, outputs, slist) {
 392         if (walk->bar.id == bar) {
 393             break;
 394         }
 395     }
 396
 397     if (walk == NULL) {
 398         DLOG("Unknown bar clicked!\n");
 399         return;
 400     }
 401
 402     int32_t x = event->event_x >= 0 ? event->event_x : 0;
 403     int32_t original_x = x;
 404
 405     DLOG("Got button %d\n", event->detail);
 406
 407     int workspace_width = 0;
 408     i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
 409
 410     TAILQ_FOREACH(ws_walk, walk->workspaces, tailq) {
 411         int w = 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
 412         if (x >= workspace_width && x <= workspace_width + w)
 413             clicked_ws = ws_walk;
 414         if (ws_walk->visible)
 415             cur_ws = ws_walk;
 416         workspace_width += w;
 417         if (TAILQ_NEXT(ws_walk, tailq) != NULL)
 418             workspace_width += logical_px(ws_spacing_px);
 419     }
 420
 421     if (x > workspace_width && child_want_click_events()) {
 422         /* If the child asked for click events,
 423          * check if a status block has been clicked. */
 424         int tray_width = get_tray_width(walk->trayclients);
 425         int block_x = 0, last_block_x;
 426         int offset = walk->rect.w - statusline_width - tray_width - logical_px(sb_hoff_px);
 427
 428         x = original_x - offset;
 429         if (x >= 0 && (size_t)x < statusline_width) {
 430             struct status_block *block;
 431             int sep_offset_remainder = 0;
 432
 433             TAILQ_FOREACH(block, &statusline_head, blocks) {
 434                 if (i3string_get_num_bytes(block->full_text) == 0)
 435                     continue;
 436
 437                 last_block_x = block_x;
 438                 block_x += block->width + block->x_offset + block->x_append + get_sep_offset(block) + sep_offset_remainder;
 439
 440                 if (x <= block_x && x >= last_block_x) {
 441                     send_block_clicked(event->detail, block->name, block->instance, event->root_x, event->root_y);
 442                     return;
 443                 }
 444
 445                 sep_offset_remainder = block->sep_block_width - get_sep_offset(block);
 446             }
 447         }
 448         x = original_x;
 449     }
 450
 451     /* If a custom command was specified for this mouse button, it overrides
 452      * the default behavior. */
 453     binding_t *binding;
 454     TAILQ_FOREACH(binding, &(config.bindings), bindings) {
 455         if (binding->input_code != event->detail)
 456             continue;
 457
 458         i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, binding->command);
 459         return;
 460     }
 461
 462     if (cur_ws == NULL) {
 463         DLOG("No workspace active?\n");
 464         return;
 465     }
 466     switch (event->detail) {
 467         case 4:
 468             /* Mouse wheel up. We select the previous ws, if any.
 469              * If there is no more workspace, don’t even send the workspace
 470              * command, otherwise (with workspace auto_back_and_forth) we’d end
 471              * up on the wrong workspace. */
 472             if (cur_ws == TAILQ_FIRST(walk->workspaces))
 473                 return;
 474
 475             cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
 476             break;
 477         case 5:
 478             /* Mouse wheel down. We select the next ws, if any.
 479              * If there is no more workspace, don’t even send the workspace
 480              * command, otherwise (with workspace auto_back_and_forth) we’d end
 481              * up on the wrong workspace. */
 482             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
 483                 return;
 484
 485             cur_ws = TAILQ_NEXT(cur_ws, tailq);
 486             break;
 487         case 1:
 488             cur_ws = clicked_ws;
 489
 490             /* if no workspace was clicked, focus our currently visible
 491              * workspace if it is not already focused */
 492             if (cur_ws == NULL) {
 493                 TAILQ_FOREACH(cur_ws, walk->workspaces, tailq) {
 494                     if (cur_ws->visible && !cur_ws->focused)
 495                         break;
 496                 }
 497             }
 498
 499             /* if there is nothing to focus, we are done */
 500             if (cur_ws == NULL)
 501                 return;
 502
 503             break;
 504         default:
 505             return;
 506     }
 507
 508     /* To properly handle workspace names with double quotes in them, we need
 509      * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
 510      * first count the number of double quotes, then we allocate a large enough
 511      * buffer, then we copy character by character. */
 512     int num_quotes = 0;
 513     size_t namelen = 0;
 514     const char *utf8_name = cur_ws->canonical_name;
 515     for (const char *walk = utf8_name; *walk != '\0'; walk++) {
 516         if (*walk == '"' || *walk == '\\')
 517             num_quotes++;
 518         /* While we’re looping through the name anyway, we can save one
 519          * strlen(). */
 520         namelen++;
 521     }
 522
 523     const size_t len = namelen + strlen("workspace \"\"") + 1;
 524     char *buffer = scalloc(len + num_quotes, 1);
 525     strncpy(buffer, "workspace \"", strlen("workspace \""));
 526     size_t inpos, outpos;
 527     for (inpos = 0, outpos = strlen("workspace \"");
 528          inpos < namelen;
 529          inpos++, outpos++) {
 530         if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
 531             buffer[outpos] = '\\';
 532             outpos++;
 533         }
 534         buffer[outpos] = utf8_name[inpos];
 535     }
 536     buffer[outpos] = '"';
 537     i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, buffer);
 538     free(buffer);
 539 }
 540
 541 /*
 542  * Handle visibility notifications: when none of the bars are visible, e.g.
 543  * if windows are in fullscreen on each output, suspend the child process.
 544  *
 545  */
 546 static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
 547     bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
 548     int num_visible = 0;
 549     i3_output *output;
 550
 551     SLIST_FOREACH(output, outputs, slist) {
 552         if (!output->active) {
 553             continue;
 554         }
 555         if (output->bar.id == event->window) {
 556             if (output->visible == visible) {
 557                 return;
 558             }
 559             output->visible = visible;
 560         }
 561         num_visible += output->visible;
 562     }
 563
 564     if (num_visible == 0) {
 565         stop_child();
 566     } else if (num_visible == visible) {
 567         /* Wake the child only when transitioning from 0 to 1 visible bar.
 568          * We cannot transition from 0 to 2 or more visible bars at once since
 569          * visibility events are delivered to each window separately */
 570         cont_child();
 571     }
 572 }
 573
 574 /*
 575  * Adjusts the size of the tray window and alignment of the tray clients by
 576  * configuring their respective x coordinates. To be called when mapping or
 577  * unmapping a tray client window.
 578  *
 579  */
 580 static void configure_trayclients(void) {
 581     trayclient *trayclient;
 582     i3_output *output;
 583     SLIST_FOREACH(output, outputs, slist) {
 584         if (!output->active)
 585             continue;
 586
 587         int clients = 0;
 588         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 589             if (!trayclient->mapped)
 590                 continue;
 591             clients++;
 592
 593             DLOG("Configuring tray window %08x to x=%d\n",
 594                  trayclient->win, output->rect.w - (clients * (icon_size + logical_px(config.tray_padding))));
 595             uint32_t x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 596             xcb_configure_window(xcb_connection,
 597                                  trayclient->win,
 598                                  XCB_CONFIG_WINDOW_X,
 599                                  &x);
 600         }
 601     }
 602 }
 603
 604 /*
 605  * Handles ClientMessages (messages sent from another client directly to us).
 606  *
 607  * At the moment, only the tray window will receive client messages. All
 608  * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
 609  *
 610  */
 611 static void handle_client_message(xcb_client_message_event_t *event) {
 612     if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
 613         event->format == 32) {
 614         DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
 615         /* event->data.data32[0] is the timestamp */
 616         uint32_t op = event->data.data32[1];
 617         uint32_t mask;
 618         uint32_t values[2];
 619         if (op == SYSTEM_TRAY_REQUEST_DOCK) {
 620             xcb_window_t client = event->data.data32[2];
 621
 622             /* Listen for PropertyNotify events to get the most recent value of
 623              * the XEMBED_MAPPED atom, also listen for UnmapNotify events */
 624             mask = XCB_CW_EVENT_MASK;
 625             values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE |
 626                         XCB_EVENT_MASK_STRUCTURE_NOTIFY;
 627             xcb_change_window_attributes(xcb_connection,
 628                                          client,
 629                                          mask,
 630                                          values);
 631
 632             /* Request the _XEMBED_INFO property. The XEMBED specification
 633              * (which is referred by the tray specification) says this *has* to
 634              * be set, but VLC does not set it… */
 635             bool map_it = true;
 636             int xe_version = 1;
 637             xcb_get_property_cookie_t xembedc;
 638             xcb_generic_error_t *error;
 639             xembedc = xcb_get_property(xcb_connection,
 640                                        0,
 641                                        client,
 642                                        atoms[_XEMBED_INFO],
 643                                        XCB_GET_PROPERTY_TYPE_ANY,
 644                                        0,
 645                                        2 * 32);
 646
 647             xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 648                                                                        xembedc,
 649                                                                        &error);
 650             if (error != NULL) {
 651                 ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
 652                      error->error_code);
 653                 free(error);
 654                 return;
 655             }
 656             if (xembedr != NULL && xembedr->length != 0) {
 657                 DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 658                 uint32_t *xembed = xcb_get_property_value(xembedr);
 659                 DLOG("xembed version = %d\n", xembed[0]);
 660                 DLOG("xembed flags = %d\n", xembed[1]);
 661                 map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 662                 xe_version = xembed[0];
 663                 if (xe_version > 1)
 664                     xe_version = 1;
 665                 free(xembedr);
 666             } else {
 667                 ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
 668             }
 669
 670             DLOG("X window %08x requested docking\n", client);
 671             i3_output *walk, *output = NULL;
 672             SLIST_FOREACH(walk, outputs, slist) {
 673                 if (!walk->active)
 674                     continue;
 675                 if (config.tray_output) {
 676                     if ((strcasecmp(walk->name, config.tray_output) != 0) &&
 677                         (!walk->primary || strcasecmp("primary", config.tray_output) != 0))
 678                         continue;
 679                 }
 680
 681                 DLOG("using output %s\n", walk->name);
 682                 output = walk;
 683                 break;
 684             }
 685             /* In case of tray_output == primary and there is no primary output
 686              * configured, we fall back to the first available output. */
 687             if (output == NULL &&
 688                 config.tray_output &&
 689                 strcasecmp("primary", config.tray_output) == 0) {
 690                 SLIST_FOREACH(walk, outputs, slist) {
 691                     if (!walk->active)
 692                         continue;
 693                     DLOG("Falling back to output %s because no primary output is configured\n", walk->name);
 694                     output = walk;
 695                     break;
 696                 }
 697             }
 698             if (output == NULL) {
 699                 ELOG("No output found\n");
 700                 return;
 701             }
 702             xcb_reparent_window(xcb_connection,
 703                                 client,
 704                                 output->bar.id,
 705                                 output->rect.w - icon_size - logical_px(config.tray_padding),
 706                                 logical_px(config.tray_padding));
 707             /* We reconfigure the window to use a reasonable size. The systray
 708              * specification explicitly says:
 709              *   Tray icons may be assigned any size by the system tray, and
 710              *   should do their best to cope with any size effectively
 711              */
 712             mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 713             values[0] = icon_size;
 714             values[1] = icon_size;
 715             xcb_configure_window(xcb_connection,
 716                                  client,
 717                                  mask,
 718                                  values);
 719
 720             /* send the XEMBED_EMBEDDED_NOTIFY message */
 721             void *event = scalloc(32, 1);
 722             xcb_client_message_event_t *ev = event;
 723             ev->response_type = XCB_CLIENT_MESSAGE;
 724             ev->window = client;
 725             ev->type = atoms[_XEMBED];
 726             ev->format = 32;
 727             ev->data.data32[0] = XCB_CURRENT_TIME;
 728             ev->data.data32[1] = atoms[XEMBED_EMBEDDED_NOTIFY];
 729             ev->data.data32[2] = output->bar.id;
 730             ev->data.data32[3] = xe_version;
 731             xcb_send_event(xcb_connection,
 732                            0,
 733                            client,
 734                            XCB_EVENT_MASK_NO_EVENT,
 735                            (char *)ev);
 736             free(event);
 737
 738             /* Put the client inside the save set. Upon termination (whether
 739              * killed or normal exit does not matter) of i3bar, these clients
 740              * will be correctly reparented to their most closest living
 741              * ancestor. Without this, tray icons might die when i3bar
 742              * exits/crashes. */
 743             xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
 744
 745             trayclient *tc = smalloc(sizeof(trayclient));
 746             tc->win = client;
 747             tc->xe_version = xe_version;
 748             tc->mapped = false;
 749             TAILQ_INSERT_TAIL(output->trayclients, tc, tailq);
 750
 751             if (map_it) {
 752                 DLOG("Mapping dock client\n");
 753                 xcb_map_window(xcb_connection, client);
 754             } else {
 755                 DLOG("Not mapping dock client yet\n");
 756             }
 757             /* Trigger an update to copy the statusline text to the appropriate
 758              * position */
 759             configure_trayclients();
 760             draw_bars(false);
 761         }
 762     }
 763 }
 764
 765 /*
 766  * Handles DestroyNotify events by removing the tray client from the data
 767  * structure. According to the XEmbed protocol, this is one way for a tray
 768  * client to finish the protocol. After this event is received, there is no
 769  * further interaction with the tray client.
 770  *
 771  * See: http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
 772  *
 773  */
 774 static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
 775     DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
 776
 777     i3_output *walk;
 778     SLIST_FOREACH(walk, outputs, slist) {
 779         if (!walk->active)
 780             continue;
 781         DLOG("checking output %s\n", walk->name);
 782         trayclient *trayclient;
 783         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 784             if (trayclient->win != event->window)
 785                 continue;
 786
 787             DLOG("Removing tray client with window ID %08x\n", event->window);
 788             TAILQ_REMOVE(walk->trayclients, trayclient, tailq);
 789
 790             /* Trigger an update, we now have more space for the statusline */
 791             configure_trayclients();
 792             draw_bars(false);
 793             return;
 794         }
 795     }
 796 }
 797
 798 /*
 799  * Handles MapNotify events. These events happen when a tray client shows its
 800  * window. We respond by realigning the tray clients.
 801  *
 802  */
 803 static void handle_map_notify(xcb_map_notify_event_t *event) {
 804     DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
 805
 806     i3_output *walk;
 807     SLIST_FOREACH(walk, outputs, slist) {
 808         if (!walk->active)
 809             continue;
 810         DLOG("checking output %s\n", walk->name);
 811         trayclient *trayclient;
 812         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 813             if (trayclient->win != event->window)
 814                 continue;
 815
 816             DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
 817             trayclient->mapped = true;
 818
 819             /* Trigger an update, we now have more space for the statusline */
 820             configure_trayclients();
 821             draw_bars(false);
 822             return;
 823         }
 824     }
 825 }
 826 /*
 827  * Handles UnmapNotify events. These events happen when a tray client hides its
 828  * window. We respond by realigning the tray clients.
 829  *
 830  */
 831 static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
 832     DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
 833
 834     i3_output *walk;
 835     SLIST_FOREACH(walk, outputs, slist) {
 836         if (!walk->active)
 837             continue;
 838         DLOG("checking output %s\n", walk->name);
 839         trayclient *trayclient;
 840         TAILQ_FOREACH(trayclient, walk->trayclients, tailq) {
 841             if (trayclient->win != event->window)
 842                 continue;
 843
 844             DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
 845             trayclient->mapped = false;
 846
 847             /* Trigger an update, we now have more space for the statusline */
 848             configure_trayclients();
 849             draw_bars(false);
 850             return;
 851         }
 852     }
 853 }
 854
 855 /*
 856  * Handle PropertyNotify messages. Currently only the _XEMBED_INFO property is
 857  * handled, which tells us whether a dock client should be mapped or unmapped.
 858  *
 859  */
 860 static void handle_property_notify(xcb_property_notify_event_t *event) {
 861     DLOG("PropertyNotify\n");
 862     if (event->atom == atoms[_XEMBED_INFO] &&
 863         event->state == XCB_PROPERTY_NEW_VALUE) {
 864         DLOG("xembed_info updated\n");
 865         trayclient *trayclient = NULL, *walk;
 866         i3_output *o_walk;
 867         SLIST_FOREACH(o_walk, outputs, slist) {
 868             if (!o_walk->active)
 869                 continue;
 870
 871             TAILQ_FOREACH(walk, o_walk->trayclients, tailq) {
 872                 if (walk->win != event->window)
 873                     continue;
 874                 trayclient = walk;
 875                 break;
 876             }
 877
 878             if (trayclient)
 879                 break;
 880         }
 881         if (!trayclient) {
 882             ELOG("PropertyNotify received for unknown window %08x\n",
 883                  event->window);
 884             return;
 885         }
 886         xcb_get_property_cookie_t xembedc;
 887         xembedc = xcb_get_property_unchecked(xcb_connection,
 888                                              0,
 889                                              trayclient->win,
 890                                              atoms[_XEMBED_INFO],
 891                                              XCB_GET_PROPERTY_TYPE_ANY,
 892                                              0,
 893                                              2 * 32);
 894
 895         xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
 896                                                                    xembedc,
 897                                                                    NULL);
 898         if (xembedr == NULL || xembedr->length == 0) {
 899             DLOG("xembed_info unset\n");
 900             return;
 901         }
 902
 903         DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
 904         uint32_t *xembed = xcb_get_property_value(xembedr);
 905         DLOG("xembed version = %d\n", xembed[0]);
 906         DLOG("xembed flags = %d\n", xembed[1]);
 907         bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
 908         DLOG("map state now %d\n", map_it);
 909         if (trayclient->mapped && !map_it) {
 910             /* need to unmap the window */
 911             xcb_unmap_window(xcb_connection, trayclient->win);
 912         } else if (!trayclient->mapped && map_it) {
 913             /* need to map the window */
 914             xcb_map_window(xcb_connection, trayclient->win);
 915         }
 916         free(xembedr);
 917     }
 918 }
 919
 920 /*
 921  * Handle ConfigureRequests by denying them and sending the client a
 922  * ConfigureNotify with its actual size.
 923  *
 924  */
 925 static void handle_configure_request(xcb_configure_request_event_t *event) {
 926     DLOG("ConfigureRequest for window = %08x\n", event->window);
 927
 928     trayclient *trayclient;
 929     i3_output *output;
 930     SLIST_FOREACH(output, outputs, slist) {
 931         if (!output->active)
 932             continue;
 933
 934         int clients = 0;
 935         TAILQ_FOREACH_REVERSE(trayclient, output->trayclients, tc_head, tailq) {
 936             if (!trayclient->mapped)
 937                 continue;
 938             clients++;
 939
 940             if (trayclient->win != event->window)
 941                 continue;
 942
 943             xcb_rectangle_t rect;
 944             rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
 945             rect.y = logical_px(config.tray_padding);
 946             rect.width = icon_size;
 947             rect.height = icon_size;
 948
 949             DLOG("This is a tray window. x = %d\n", rect.x);
 950             fake_configure_notify(xcb_connection, rect, event->window, 0);
 951             return;
 952         }
 953     }
 954
 955     DLOG("WARNING: Could not find corresponding tray window.\n");
 956 }
 957
 958 /*
 959  * This function is called immediately before the main loop locks. We flush xcb
 960  * then (and only then)
 961  *
 962  */
 963 void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
 964     xcb_flush(xcb_connection);
 965 }
 966
 967 /*
 968  * This function is called immediately after the main loop locks, so when one
 969  * of the watchers registered an event.
 970  * We check whether an X-Event arrived and handle it.
 971  *
 972  */
 973 void xcb_chk_cb(struct ev_loop *loop, ev_check *watcher, int revents) {
 974     xcb_generic_event_t *event;
 975
 976     if (xcb_connection_has_error(xcb_connection)) {
 977         ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
 978         exit(1);
 979     }
 980
 981     while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
 982         int type = (event->response_type & ~0x80);
 983
 984         if (type == xkb_base && xkb_base > -1) {
 985             DLOG("received an xkb event\n");
 986
 987             xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
 988             if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
 989                 int modstate = state->mods & config.modifier;
 990
 991 #define DLOGMOD(modmask, status)                        \
 992     do {                                                \
 993         switch (modmask) {                              \
 994             case ShiftMask:                             \
 995                 DLOG("ShiftMask got " #status "!\n");   \
 996                 break;                                  \
 997             case ControlMask:                           \
 998                 DLOG("ControlMask got " #status "!\n"); \
 999                 break;                                  \
1000             case Mod1Mask:                              \
1001                 DLOG("Mod1Mask got " #status "!\n");    \
1002                 break;                                  \
1003             case Mod2Mask:                              \
1004                 DLOG("Mod2Mask got " #status "!\n");    \
1005                 break;                                  \
1006             case Mod3Mask:                              \
1007                 DLOG("Mod3Mask got " #status "!\n");    \
1008                 break;                                  \
1009             case Mod4Mask:                              \
1010                 DLOG("Mod4Mask got " #status "!\n");    \
1011                 break;                                  \
1012             case Mod5Mask:                              \
1013                 DLOG("Mod5Mask got " #status "!\n");    \
1014                 break;                                  \
1015         }                                               \
1016     } while (0)
1017
1018                 if (modstate != mod_pressed) {
1019                     if (modstate == 0) {
1020                         DLOGMOD(config.modifier, released);
1021                         if (!activated_mode)
1022                             hide_bars();
1023                     } else {
1024                         DLOGMOD(config.modifier, pressed);
1025                         activated_mode = false;
1026                         unhide_bars();
1027                     }
1028                     mod_pressed = modstate;
1029                 }
1030 #undef DLOGMOD
1031             }
1032
1033             free(event);
1034             continue;
1035         }
1036
1037         switch (type) {
1038             case XCB_VISIBILITY_NOTIFY:
1039                 /* Visibility change: a bar is [un]obscured by other window */
1040                 handle_visibility_notify((xcb_visibility_notify_event_t *)event);
1041                 break;
1042             case XCB_EXPOSE:
1043                 /* Expose-events happen, when the window needs to be redrawn */
1044                 redraw_bars();
1045                 break;
1046             case XCB_BUTTON_PRESS:
1047                 /* Button press events are mouse buttons clicked on one of our bars */
1048                 handle_button((xcb_button_press_event_t *)event);
1049                 break;
1050             case XCB_CLIENT_MESSAGE:
1051                 /* Client messages are used for client-to-client communication, for
1052                  * example system tray widgets talk to us directly via client messages. */
1053                 handle_client_message((xcb_client_message_event_t *)event);
1054                 break;
1055             case XCB_DESTROY_NOTIFY:
1056                 /* DestroyNotify signifies the end of the XEmbed protocol */
1057                 handle_destroy_notify((xcb_destroy_notify_event_t *)event);
1058                 break;
1059             case XCB_UNMAP_NOTIFY:
1060                 /* UnmapNotify is received when a tray client hides its window. */
1061                 handle_unmap_notify((xcb_unmap_notify_event_t *)event);
1062                 break;
1063             case XCB_MAP_NOTIFY:
1064                 handle_map_notify((xcb_map_notify_event_t *)event);
1065                 break;
1066             case XCB_PROPERTY_NOTIFY:
1067                 /* PropertyNotify */
1068                 handle_property_notify((xcb_property_notify_event_t *)event);
1069                 break;
1070             case XCB_CONFIGURE_REQUEST:
1071                 /* ConfigureRequest, sent by a tray child */
1072                 handle_configure_request((xcb_configure_request_event_t *)event);
1073                 break;
1074         }
1075         free(event);
1076     }
1077 }
1078
1079 /*
1080  * Dummy callback. We only need this, so that the prepare and check watchers
1081  * are triggered
1082  *
1083  */
1084 void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
1085 }
1086
1087 /*
1088  * Early initialization of the connection to X11: Everything which does not
1089  * depend on 'config'.
1090  *
1091  */
1092 char *init_xcb_early() {
1093     /* FIXME: xcb_connect leaks memory */
1094     xcb_connection = xcb_connect(NULL, &screen);
1095     if (xcb_connection_has_error(xcb_connection)) {
1096         ELOG("Cannot open display\n");
1097         exit(EXIT_FAILURE);
1098     }
1099     conn = xcb_connection;
1100     DLOG("Connected to xcb\n");
1101
1102 /* We have to request the atoms we need */
1103 #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
1104 #include "xcb_atoms.def"
1105
1106     root_screen = xcb_aux_get_screen(xcb_connection, screen);
1107     xcb_root = root_screen->root;
1108
1109     /* We draw the statusline to a seperate pixmap, because it looks the same on all bars and
1110      * this way, we can choose to crop it */
1111     xcb_pixmap_t statusline_id = xcb_generate_id(xcb_connection);
1112     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1113                                                                root_screen->root_depth,
1114                                                                statusline_id,
1115                                                                xcb_root,
1116                                                                root_screen->width_in_pixels,
1117                                                                root_screen->height_in_pixels);
1118     cairo_surface_init(&statusline_surface, statusline_id, root_screen->width_in_pixels, root_screen->height_in_pixels);
1119
1120     /* The various watchers to communicate with xcb */
1121     xcb_io = smalloc(sizeof(ev_io));
1122     xcb_prep = smalloc(sizeof(ev_prepare));
1123     xcb_chk = smalloc(sizeof(ev_check));
1124
1125     ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
1126     ev_prepare_init(xcb_prep, &xcb_prep_cb);
1127     ev_check_init(xcb_chk, &xcb_chk_cb);
1128
1129     ev_io_start(main_loop, xcb_io);
1130     ev_prepare_start(main_loop, xcb_prep);
1131     ev_check_start(main_loop, xcb_chk);
1132
1133     /* Now we get the atoms and save them in a nice data structure */
1134     get_atoms();
1135
1136     char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
1137
1138     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer"))
1139         exit(EXIT_FAILURE);
1140
1141     return path;
1142 }
1143
1144 /*
1145  * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
1146  * involving that modifier, we sadly have to use xkb which is not yet fully supported
1147  * in xcb.
1148  *
1149  */
1150 void register_xkb_keyevents() {
1151     const xcb_query_extension_reply_t *extreply;
1152     extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
1153     if (!extreply->present) {
1154         ELOG("xkb is not present on this server\n");
1155         exit(EXIT_FAILURE);
1156     }
1157     DLOG("initializing xcb-xkb\n");
1158     xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
1159     xcb_xkb_select_events(conn,
1160                           XCB_XKB_ID_USE_CORE_KBD,
1161                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1162                           0,
1163                           XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
1164                           0xff,
1165                           0xff,
1166                           NULL);
1167     xkb_base = extreply->first_event;
1168 }
1169
1170 /*
1171  * Deregister from xkb keyevents.
1172  *
1173  */
1174 void deregister_xkb_keyevents() {
1175     xcb_xkb_select_events(conn,
1176                           XCB_XKB_ID_USE_CORE_KBD,
1177                           0,
1178                           0,
1179                           0,
1180                           0xff,
1181                           0xff,
1182                           NULL);
1183 }
1184
1185 /*
1186  * Initialization which depends on 'config' being usable. Called after the
1187  * configuration has arrived.
1188  *
1189  */
1190 void init_xcb_late(char *fontname) {
1191     if (fontname == NULL)
1192         fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
1193
1194     /* Load the font */
1195     font = load_font(fontname, true);
1196     set_font(&font);
1197     DLOG("Calculated font height: %d\n", font.height);
1198     bar_height = font.height + 2 * logical_px(ws_voff_px);
1199     icon_size = bar_height - 2 * logical_px(config.tray_padding);
1200
1201     if (config.separator_symbol)
1202         separator_symbol_width = predict_text_width(config.separator_symbol);
1203
1204     xcb_flush(xcb_connection);
1205
1206     if (config.hide_on_modifier == M_HIDE)
1207         register_xkb_keyevents();
1208 }
1209
1210 /*
1211  * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
1212  * selection.
1213  *
1214  */
1215 static void send_tray_clientmessage(void) {
1216     uint8_t buffer[32] = {0};
1217     xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
1218
1219     ev->response_type = XCB_CLIENT_MESSAGE;
1220     ev->window = xcb_root;
1221     ev->type = atoms[MANAGER];
1222     ev->format = 32;
1223     ev->data.data32[0] = XCB_CURRENT_TIME;
1224     ev->data.data32[1] = tray_reply->atom;
1225     ev->data.data32[2] = selwin;
1226
1227     xcb_send_event(xcb_connection,
1228                    0,
1229                    xcb_root,
1230                    0xFFFFFF,
1231                    (char *)buffer);
1232 }
1233
1234 /*
1235  * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
1236  * for the X11 display we are running on, then acquiring the selection for this
1237  * atom. Afterwards, tray clients will send ClientMessages to our window.
1238  *
1239  */
1240 void init_tray(void) {
1241     DLOG("Initializing system tray functionality\n");
1242     /* request the tray manager atom for the X11 display we are running on */
1243     char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
1244     snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
1245     xcb_intern_atom_cookie_t tray_cookie;
1246     if (tray_reply == NULL)
1247         tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
1248
1249     /* tray support: we need a window to own the selection */
1250     selwin = xcb_generate_id(xcb_connection);
1251     uint32_t selmask = XCB_CW_OVERRIDE_REDIRECT;
1252     uint32_t selval[] = {1};
1253     xcb_create_window(xcb_connection,
1254                       root_screen->root_depth,
1255                       selwin,
1256                       xcb_root,
1257                       -1, -1,
1258                       1, 1,
1259                       0,
1260                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
1261                       root_screen->root_visual,
1262                       selmask,
1263                       selval);
1264
1265     uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
1266     /* set the atoms */
1267     xcb_change_property(xcb_connection,
1268                         XCB_PROP_MODE_REPLACE,
1269                         selwin,
1270                         atoms[_NET_SYSTEM_TRAY_ORIENTATION],
1271                         XCB_ATOM_CARDINAL,
1272                         32,
1273                         1,
1274                         &orientation);
1275
1276     init_tray_colors();
1277
1278     if (tray_reply == NULL) {
1279         if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
1280             ELOG("Could not get atom %s\n", atomname);
1281             exit(EXIT_FAILURE);
1282         }
1283     }
1284
1285     xcb_set_selection_owner(xcb_connection,
1286                             selwin,
1287                             tray_reply->atom,
1288                             XCB_CURRENT_TIME);
1289
1290     /* Verify that we have the selection */
1291     xcb_get_selection_owner_cookie_t selcookie;
1292     xcb_get_selection_owner_reply_t *selreply;
1293
1294     selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
1295     if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
1296         ELOG("Could not get selection owner for %s\n", atomname);
1297         exit(EXIT_FAILURE);
1298     }
1299
1300     if (selreply->owner != selwin) {
1301         ELOG("Could not set the %s selection. "
1302              "Maybe another tray is already running?\n",
1303              atomname);
1304         /* NOTE that this error is not fatal. We just can’t provide tray
1305          * functionality */
1306         free(selreply);
1307         return;
1308     }
1309
1310     send_tray_clientmessage();
1311 }
1312
1313 /*
1314  * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
1315  * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
1316  * they assume a light background.
1317  * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
1318  *
1319  */
1320 void init_tray_colors(void) {
1321     /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
1322     const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
1323
1324     DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
1325
1326     char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
1327                             {bar_fg[3], bar_fg[4], '\0'},
1328                             {bar_fg[5], bar_fg[6], '\0'}};
1329     const uint8_t r = strtol(strgroups[0], NULL, 16);
1330     const uint8_t g = strtol(strgroups[1], NULL, 16);
1331     const uint8_t b = strtol(strgroups[2], NULL, 16);
1332
1333     const uint16_t r16 = ((uint16_t)r << 8) | r;
1334     const uint16_t g16 = ((uint16_t)g << 8) | g;
1335     const uint16_t b16 = ((uint16_t)b << 8) | b;
1336
1337     const uint32_t tray_colors[12] = {
1338         r16, g16, b16, /* foreground color */
1339         r16, g16, b16, /* error color */
1340         r16, g16, b16, /* warning color */
1341         r16, g16, b16, /* success color */
1342     };
1343
1344     xcb_change_property(xcb_connection,
1345                         XCB_PROP_MODE_REPLACE,
1346                         selwin,
1347                         atoms[_NET_SYSTEM_TRAY_COLORS],
1348                         XCB_ATOM_CARDINAL,
1349                         32,
1350                         12,
1351                         tray_colors);
1352 }
1353
1354 /*
1355  * Cleanup the xcb stuff.
1356  * Called once, before the program terminates.
1357  *
1358  */
1359 void clean_xcb(void) {
1360     i3_output *o_walk;
1361     free_workspaces();
1362     SLIST_FOREACH(o_walk, outputs, slist) {
1363         destroy_window(o_walk);
1364         FREE(o_walk->trayclients);
1365         FREE(o_walk->workspaces);
1366         FREE(o_walk->name);
1367     }
1368     FREE_SLIST(outputs, i3_output);
1369     FREE(outputs);
1370
1371     xcb_flush(xcb_connection);
1372     xcb_aux_sync(xcb_connection);
1373     xcb_disconnect(xcb_connection);
1374
1375     ev_check_stop(main_loop, xcb_chk);
1376     ev_prepare_stop(main_loop, xcb_prep);
1377     ev_io_stop(main_loop, xcb_io);
1378
1379     FREE(xcb_chk);
1380     FREE(xcb_prep);
1381     FREE(xcb_io);
1382 }
1383
1384 /*
1385  * Get the earlier requested atoms and save them in the prepared data structure
1386  *
1387  */
1388 void get_atoms(void) {
1389     xcb_intern_atom_reply_t *reply;
1390 #define ATOM_DO(name)                                                        \
1391     reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
1392     if (reply == NULL) {                                                     \
1393         ELOG("Could not get atom %s\n", #name);                              \
1394         exit(EXIT_FAILURE);                                                  \
1395     }                                                                        \
1396     atoms[name] = reply->atom;                                               \
1397     free(reply);
1398
1399 #include "xcb_atoms.def"
1400     DLOG("Got atoms\n");
1401 }
1402
1403 /*
1404  * Reparents all tray clients of the specified output to the root window. This
1405  * is either used when shutting down, when an output appears (xrandr --output
1406  * VGA1 --off) or when the primary output changes.
1407  *
1408  * Applications using the tray will start the protocol from the beginning again
1409  * afterwards.
1410  *
1411  */
1412 void kick_tray_clients(i3_output *output) {
1413     if (TAILQ_EMPTY(output->trayclients))
1414         return;
1415
1416     trayclient *trayclient;
1417     while (!TAILQ_EMPTY(output->trayclients)) {
1418         trayclient = TAILQ_FIRST(output->trayclients);
1419         /* Unmap, then reparent (to root) the tray client windows */
1420         xcb_unmap_window(xcb_connection, trayclient->win);
1421         xcb_reparent_window(xcb_connection,
1422                             trayclient->win,
1423                             xcb_root,
1424                             0,
1425                             0);
1426
1427         /* We remove the trayclient right here. We might receive an UnmapNotify
1428          * event afterwards, but better safe than sorry. */
1429         TAILQ_REMOVE(output->trayclients, trayclient, tailq);
1430     }
1431
1432     /* Fake a DestroyNotify so that Qt re-adds tray icons.
1433      * We cannot actually destroy the window because then Qt will not restore
1434      * its event mask on the new window. */
1435     uint8_t buffer[32] = {0};
1436     xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
1437
1438     event->response_type = XCB_DESTROY_NOTIFY;
1439     event->event = selwin;
1440     event->window = selwin;
1441
1442     xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
1443
1444     send_tray_clientmessage();
1445 }
1446
1447 /*
1448  * Destroy the bar of the specified output
1449  *
1450  */
1451 void destroy_window(i3_output *output) {
1452     if (output == NULL) {
1453         return;
1454     }
1455     if (output->bar.id == XCB_NONE) {
1456         return;
1457     }
1458
1459     kick_tray_clients(output);
1460     xcb_destroy_window(xcb_connection, output->bar.id);
1461     output->bar.id = XCB_NONE;
1462 }
1463
1464 /*
1465  * Reallocate the statusline buffer
1466  *
1467  */
1468 void realloc_sl_buffer(void) {
1469     DLOG("Re-allocating statusline buffer, statusline_width = %d, root_screen->width_in_pixels = %d\n",
1470          statusline_width, root_screen->width_in_pixels);
1471     xcb_free_pixmap(xcb_connection, statusline_surface.id);
1472     cairo_surface_free(&statusline_surface);
1473
1474     xcb_pixmap_t statusline_id = xcb_generate_id(xcb_connection);
1475     xcb_void_cookie_t sl_pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1476                                                                root_screen->root_depth,
1477                                                                statusline_id,
1478                                                                xcb_root,
1479                                                                MAX(root_screen->width_in_pixels, statusline_width),
1480                                                                bar_height);
1481     cairo_surface_init(&statusline_surface, statusline_id, root_screen->width_in_pixels, root_screen->height_in_pixels);
1482
1483     if (xcb_request_failed(sl_pm_cookie, "Could not allocate statusline buffer"))
1484         exit(EXIT_FAILURE);
1485 }
1486
1487 /* Strut partial tells i3 where to reserve space for i3bar. This is determined
1488  * by the `position` bar config directive. */
1489 xcb_void_cookie_t config_strut_partial(i3_output *output) {
1490     /* A local struct to save the strut_partial property */
1491     struct {
1492         uint32_t left;
1493         uint32_t right;
1494         uint32_t top;
1495         uint32_t bottom;
1496         uint32_t left_start_y;
1497         uint32_t left_end_y;
1498         uint32_t right_start_y;
1499         uint32_t right_end_y;
1500         uint32_t top_start_x;
1501         uint32_t top_end_x;
1502         uint32_t bottom_start_x;
1503         uint32_t bottom_end_x;
1504     } __attribute__((__packed__)) strut_partial;
1505     memset(&strut_partial, 0, sizeof(strut_partial));
1506
1507     switch (config.position) {
1508         case POS_NONE:
1509             break;
1510         case POS_TOP:
1511             strut_partial.top = bar_height;
1512             strut_partial.top_start_x = output->rect.x;
1513             strut_partial.top_end_x = output->rect.x + output->rect.w;
1514             break;
1515         case POS_BOT:
1516             strut_partial.bottom = bar_height;
1517             strut_partial.bottom_start_x = output->rect.x;
1518             strut_partial.bottom_end_x = output->rect.x + output->rect.w;
1519             break;
1520     }
1521     return xcb_change_property(xcb_connection,
1522                                XCB_PROP_MODE_REPLACE,
1523                                output->bar.id,
1524                                atoms[_NET_WM_STRUT_PARTIAL],
1525                                XCB_ATOM_CARDINAL,
1526                                32,
1527                                12,
1528                                &strut_partial);
1529 }
1530
1531 /*
1532  * Reconfigure all bars and create new bars for recently activated outputs
1533  *
1534  */
1535 void reconfig_windows(bool redraw_bars) {
1536     uint32_t mask;
1537     uint32_t values[5];
1538     static bool tray_configured = false;
1539
1540     i3_output *walk;
1541     SLIST_FOREACH(walk, outputs, slist) {
1542         if (!walk->active) {
1543             /* If an output is not active, we destroy its bar */
1544             /* FIXME: Maybe we rather want to unmap? */
1545             DLOG("Destroying window for output %s\n", walk->name);
1546             destroy_window(walk);
1547             continue;
1548         }
1549         if (walk->bar.id == XCB_NONE) {
1550             DLOG("Creating window for output %s\n", walk->name);
1551
1552             xcb_window_t bar_id = xcb_generate_id(xcb_connection);
1553             xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
1554             mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
1555             /* Black background */
1556             values[0] = colors.bar_bg.colorpixel;
1557             /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
1558             values[1] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1559             /* We enable the following EventMask fields:
1560              * EXPOSURE, to get expose events (we have to re-draw then)
1561              * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
1562              *                        child windows use ConfigureWindow
1563              * BUTTON_PRESS, to handle clicks on the workspace buttons
1564              * */
1565             values[2] = XCB_EVENT_MASK_EXPOSURE |
1566                         XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
1567                         XCB_EVENT_MASK_BUTTON_PRESS;
1568             if (config.hide_on_modifier == M_DOCK) {
1569                 /* If the bar is normally visible, catch visibility change events to suspend
1570                  * the status process when the bar is obscured by full-screened windows.  */
1571                 values[2] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
1572                 walk->visible = true;
1573             }
1574             xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
1575                                                                      root_screen->root_depth,
1576                                                                      bar_id,
1577                                                                      xcb_root,
1578                                                                      walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
1579                                                                      walk->rect.w, bar_height,
1580                                                                      0,
1581                                                                      XCB_WINDOW_CLASS_INPUT_OUTPUT,
1582                                                                      root_screen->root_visual,
1583                                                                      mask,
1584                                                                      values);
1585
1586             /* The double-buffer we use to render stuff off-screen */
1587             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1588                                                                     root_screen->root_depth,
1589                                                                     buffer_id,
1590                                                                     bar_id,
1591                                                                     walk->rect.w,
1592                                                                     bar_height);
1593
1594             /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
1595             xcb_void_cookie_t class_cookie;
1596             class_cookie = xcb_change_property(xcb_connection,
1597                                                XCB_PROP_MODE_REPLACE,
1598                                                bar_id,
1599                                                XCB_ATOM_WM_CLASS,
1600                                                XCB_ATOM_STRING,
1601                                                8,
1602                                                (strlen("i3bar") + 1) * 2,
1603                                                "i3bar\0i3bar\0");
1604
1605             char *name;
1606             sasprintf(&name, "i3bar for output %s", walk->name);
1607             xcb_void_cookie_t name_cookie;
1608             name_cookie = xcb_change_property(xcb_connection,
1609                                               XCB_PROP_MODE_REPLACE,
1610                                               bar_id,
1611                                               XCB_ATOM_WM_NAME,
1612                                               XCB_ATOM_STRING,
1613                                               8,
1614                                               strlen(name),
1615                                               name);
1616             free(name);
1617
1618             /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
1619              * this one */
1620             xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
1621                                                                 XCB_PROP_MODE_REPLACE,
1622                                                                 bar_id,
1623                                                                 atoms[_NET_WM_WINDOW_TYPE],
1624                                                                 XCB_ATOM_ATOM,
1625                                                                 32,
1626                                                                 1,
1627                                                                 (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
1628
1629             cairo_surface_init(&walk->bar, bar_id, walk->rect.w, bar_height);
1630             cairo_surface_init(&walk->buffer, buffer_id, walk->rect.w, bar_height);
1631
1632             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1633
1634             /* We finally map the bar (display it on screen), unless the modifier-switch is on */
1635             xcb_void_cookie_t map_cookie;
1636             if (config.hide_on_modifier == M_DOCK) {
1637                 map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
1638             }
1639
1640             if (xcb_request_failed(win_cookie, "Could not create window") ||
1641                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1642                 xcb_request_failed(dock_cookie, "Could not set dock mode") ||
1643                 xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
1644                 xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
1645                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1646                 ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
1647                 exit(EXIT_FAILURE);
1648             }
1649
1650             const char *tray_output = (config.tray_output ? config.tray_output : SLIST_FIRST(outputs)->name);
1651             if (!tray_configured && strcasecmp(tray_output, "none") != 0) {
1652                 /* Configuration sanity check: ensure this i3bar instance handles the output on
1653                  * which the tray should appear (e.g. don’t initialize a tray if tray_output ==
1654                  * VGA-1 but output == [HDMI-1]).
1655                  */
1656                 i3_output *output;
1657                 SLIST_FOREACH(output, outputs, slist) {
1658                     if (strcasecmp(output->name, tray_output) == 0 ||
1659                         (strcasecmp(tray_output, "primary") == 0 && output->primary)) {
1660                         init_tray();
1661                         break;
1662                     }
1663                 }
1664                 tray_configured = true;
1665             }
1666         } else {
1667             /* We already have a bar, so we just reconfigure it */
1668             mask = XCB_CONFIG_WINDOW_X |
1669                    XCB_CONFIG_WINDOW_Y |
1670                    XCB_CONFIG_WINDOW_WIDTH |
1671                    XCB_CONFIG_WINDOW_HEIGHT |
1672                    XCB_CONFIG_WINDOW_STACK_MODE;
1673             values[0] = walk->rect.x;
1674             if (config.position == POS_TOP)
1675                 values[1] = walk->rect.y;
1676             else
1677                 values[1] = walk->rect.y + walk->rect.h - bar_height;
1678             values[2] = walk->rect.w;
1679             values[3] = bar_height;
1680             values[4] = XCB_STACK_MODE_ABOVE;
1681
1682             DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
1683             xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
1684
1685             DLOG("Destroying buffer for output %s\n", walk->name);
1686             xcb_free_pixmap(xcb_connection, walk->buffer.id);
1687
1688             DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
1689             xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
1690                                                                         walk->bar.id,
1691                                                                         mask,
1692                                                                         values);
1693
1694             mask = XCB_CW_OVERRIDE_REDIRECT;
1695             values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
1696             DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
1697             xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
1698                                                                         walk->bar.id,
1699                                                                         mask,
1700                                                                         values);
1701
1702             DLOG("Recreating buffer for output %s\n", walk->name);
1703             xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
1704                                                                     root_screen->root_depth,
1705                                                                     walk->buffer.id,
1706                                                                     walk->bar.id,
1707                                                                     walk->rect.w,
1708                                                                     bar_height);
1709
1710             cairo_surface_free(&(walk->bar));
1711             cairo_surface_free(&(walk->buffer));
1712             cairo_surface_init(&(walk->bar), walk->bar.id, walk->rect.w, bar_height);
1713             cairo_surface_init(&(walk->buffer), walk->buffer.id, walk->rect.w, bar_height);
1714
1715             xcb_void_cookie_t map_cookie, umap_cookie;
1716             if (redraw_bars) {
1717                 /* Unmap the window, and draw it again when in dock mode */
1718                 umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
1719                 if (config.hide_on_modifier == M_DOCK) {
1720                     cont_child();
1721                     map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
1722                 } else {
1723                     stop_child();
1724                 }
1725
1726                 if (config.hide_on_modifier == M_HIDE) {
1727                     /* Switching to hide mode, register for keyevents */
1728                     register_xkb_keyevents();
1729                 } else {
1730                     /* Switching to dock/invisible mode, deregister from keyevents */
1731                     deregister_xkb_keyevents();
1732                 }
1733             }
1734
1735             if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
1736                 xcb_request_failed(chg_cookie, "Could not change window") ||
1737                 xcb_request_failed(pm_cookie, "Could not create pixmap") ||
1738                 xcb_request_failed(strut_cookie, "Could not set strut") ||
1739                 (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
1740                                  (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
1741                 exit(EXIT_FAILURE);
1742             }
1743         }
1744     }
1745 }
1746
1747 /*
1748  * Render the bars, with buttons and statusline
1749  *
1750  */
1751 void draw_bars(bool unhide) {
1752     DLOG("Drawing bars...\n");
1753     int workspace_width = 0;
1754     /* Is the currently-rendered statusline using short_text items? */
1755     bool rendered_statusline_is_short = false;
1756
1757     refresh_statusline(false);
1758
1759     i3_output *outputs_walk;
1760     SLIST_FOREACH(outputs_walk, outputs, slist) {
1761         if (!outputs_walk->active) {
1762             DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
1763             continue;
1764         }
1765         if (outputs_walk->bar.id == XCB_NONE) {
1766             /* Oh shit, an active output without an own bar. Create it now! */
1767             reconfig_windows(false);
1768         }
1769         /* First things first: clear the backbuffer */
1770         cairo_set_source_color(&(outputs_walk->buffer), colors.bar_bg);
1771         cairo_rectangle(outputs_walk->buffer.cr, 0, 0, outputs_walk->rect.w, bar_height);
1772         cairo_fill(outputs_walk->buffer.cr);
1773
1774         if (!config.disable_ws) {
1775             i3_ws *ws_walk;
1776             TAILQ_FOREACH(ws_walk, outputs_walk->workspaces, tailq) {
1777                 DLOG("Drawing button for WS %s at x = %d, len = %d\n",
1778                      i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
1779                 color_t fg_color = colors.inactive_ws_fg;
1780                 color_t bg_color = colors.inactive_ws_bg;
1781                 color_t border_color = colors.inactive_ws_border;
1782                 if (ws_walk->visible) {
1783                     if (!ws_walk->focused) {
1784                         fg_color = colors.active_ws_fg;
1785                         bg_color = colors.active_ws_bg;
1786                         border_color = colors.active_ws_border;
1787                     } else {
1788                         fg_color = colors.focus_ws_fg;
1789                         bg_color = colors.focus_ws_bg;
1790                         border_color = colors.focus_ws_border;
1791                     }
1792                 }
1793                 if (ws_walk->urgent) {
1794                     DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
1795                     fg_color = colors.urgent_ws_fg;
1796                     bg_color = colors.urgent_ws_bg;
1797                     border_color = colors.urgent_ws_border;
1798                     unhide = true;
1799                 }
1800
1801                 cairo_set_source_color(&(outputs_walk->buffer), border_color);
1802                 cairo_rectangle(outputs_walk->buffer.cr, workspace_width, logical_px(1),
1803                                 ws_walk->name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1804                                 font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1805                 cairo_fill(outputs_walk->buffer.cr);
1806
1807                 cairo_set_source_color(&(outputs_walk->buffer), bg_color);
1808                 cairo_rectangle(outputs_walk->buffer.cr, workspace_width + logical_px(1), 2 * logical_px(1),
1809                                 ws_walk->name_width + 2 * logical_px(ws_hoff_px),
1810                                 font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1811                 cairo_fill(outputs_walk->buffer.cr);
1812
1813                 set_font_colors(outputs_walk->buffer.gc, fg_color.colorpixel, bg_color.colorpixel);
1814                 draw_text(ws_walk->name, outputs_walk->buffer.id, outputs_walk->buffer.gc,
1815                           workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1816                           logical_px(ws_voff_px),
1817                           ws_walk->name_width);
1818
1819                 workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + ws_walk->name_width;
1820                 if (TAILQ_NEXT(ws_walk, tailq) != NULL)
1821                     workspace_width += logical_px(ws_spacing_px);
1822             }
1823         }
1824
1825         if (binding.name && !config.disable_binding_mode_indicator) {
1826             workspace_width += logical_px(ws_spacing_px);
1827
1828             color_t fg_color = colors.binding_mode_fg;
1829             color_t bg_color = colors.binding_mode_bg;
1830
1831             cairo_set_source_color(&(outputs_walk->buffer), colors.binding_mode_border);
1832             cairo_rectangle(outputs_walk->buffer.cr, workspace_width, logical_px(1),
1833                             binding.width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
1834                             font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1));
1835             cairo_fill(outputs_walk->buffer.cr);
1836
1837             cairo_set_source_color(&(outputs_walk->buffer), bg_color);
1838             cairo_rectangle(outputs_walk->buffer.cr, workspace_width + logical_px(1), 2 * logical_px(1),
1839                             binding.width + 2 * logical_px(ws_hoff_px),
1840                             font.height + 2 * logical_px(ws_voff_px) - 4 * logical_px(1));
1841             cairo_fill(outputs_walk->buffer.cr);
1842
1843             set_font_colors(outputs_walk->buffer.gc, fg_color.colorpixel, bg_color.colorpixel);
1844             draw_text(binding.name,
1845                       outputs_walk->buffer.id,
1846                       outputs_walk->buffer.gc,
1847                       workspace_width + logical_px(ws_hoff_px) + logical_px(1),
1848                       logical_px(ws_voff_px),
1849                       binding.width);
1850
1851             unhide = true;
1852             workspace_width += 2 * logical_px(ws_hoff_px) + 2 * logical_px(1) + binding.width;
1853         }
1854
1855         if (!TAILQ_EMPTY(&statusline_head)) {
1856             DLOG("Printing statusline!\n");
1857
1858             int tray_width = get_tray_width(outputs_walk->trayclients);
1859             uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - 2 * logical_px(sb_hoff_px);
1860
1861             /* If the statusline is too long, try to use short texts. */
1862             if (statusline_width > max_statusline_width) {
1863                 /* If the currently rendered statusline is long, render a short status line */
1864                 refresh_statusline(true);
1865                 rendered_statusline_is_short = true;
1866             } else if (rendered_statusline_is_short) {
1867                 /* If the currently rendered statusline is short, render a long status line */
1868                 refresh_statusline(false);
1869                 rendered_statusline_is_short = false;
1870             }
1871
1872             /* Luckily we already prepared a seperate pixmap containing the rendered
1873              * statusline, we just have to copy the relevant parts to the relevant
1874              * position */
1875             int visible_statusline_width = MIN(statusline_width, max_statusline_width);
1876             int x_src = (int16_t)(statusline_width - visible_statusline_width);
1877             int x_dest = (int16_t)(outputs_walk->rect.w - tray_width - logical_px(sb_hoff_px) - visible_statusline_width);
1878
1879             cairo_set_source_surface(outputs_walk->buffer.cr, statusline_surface.surface, x_dest - x_src, 0);
1880             cairo_rectangle(outputs_walk->buffer.cr, x_dest, 0, (int16_t)visible_statusline_width, (int16_t)bar_height);
1881             cairo_fill(outputs_walk->buffer.cr);
1882         }
1883
1884         workspace_width = 0;
1885     }
1886
1887     /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
1888     if (mod_pressed ||
1889         config.hidden_state == S_SHOW ||
1890         unhide) {
1891         unhide_bars();
1892     } else if (config.hide_on_modifier == M_HIDE) {
1893         hide_bars();
1894     }
1895
1896     redraw_bars();
1897 }
1898
1899 /*
1900  * Redraw the bars, i.e. simply copy the buffer to the barwindow
1901  *
1902  */
1903 void redraw_bars(void) {
1904     i3_output *outputs_walk;
1905     SLIST_FOREACH(outputs_walk, outputs, slist) {
1906         if (!outputs_walk->active) {
1907             continue;
1908         }
1909         cairo_set_source_surface(outputs_walk->bar.cr, outputs_walk->buffer.surface, 0, 0);
1910         cairo_rectangle(outputs_walk->bar.cr, 0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
1911         cairo_fill(outputs_walk->bar.cr);
1912         xcb_flush(xcb_connection);
1913     }
1914 }
1915
1916 /*
1917  * Set the current binding mode
1918  *
1919  */
1920 void set_current_mode(struct mode *current) {
1921     I3STRING_FREE(binding.name);
1922     binding = *current;
1923     activated_mode = binding.name != NULL;
1924     return;
1925 }