text: /*
   * vim:ts=4:sw=4:expandtab
   *
   * i3bar - an xcb-based status- and ws-bar for i3
   * © 2010 Axel Wagner and contributors (see also: LICENSE)
   *
   * xcb.c: Communicating with X
   *
   */
  #include "common.h"
  
  #include <err.h>
  #include <ev.h>
  #include <i3/ipc.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include <xcb/xcb_aux.h>
  #include <xcb/xcb_cursor.h>
  #include <xcb/xkb.h>
  
  #ifdef I3_ASAN_ENABLED
  #include <sanitizer/lsan_interface.h>
  #endif
  
  #include "libi3.h"
  
  /* We save the atoms in an easy to access array, indexed by an enum */
  enum {
  #define ATOM_DO(name) name,
  #include "xcb_atoms.def"
      NUM_ATOMS
  };
  
  xcb_intern_atom_cookie_t atom_cookies[NUM_ATOMS];
  xcb_atom_t atoms[NUM_ATOMS];
  
  /* Variables, that are the same for all functions at all times */
  xcb_connection_t *xcb_connection;
  int screen;
  xcb_screen_t *root_screen;
  xcb_window_t xcb_root;
  static xcb_cursor_t cursor;
  
  /* selection window for tray support */
  static xcb_window_t selwin = XCB_NONE;
  static xcb_intern_atom_reply_t *tray_reply = NULL;
  
  /* This is needed for integration with libi3 */
  xcb_connection_t *conn;
  
  /* The font we'll use */
  static i3Font font;
  
  /* Icon size (based on font size) */
  int icon_size;
  
  xcb_visualtype_t *visual_type;
  uint8_t depth;
  xcb_colormap_t colormap;
  
  /* Overall height of the bar (based on font size) */
  int bar_height;
  
  /* These are only relevant for XKB, which we only need for grabbing modifiers */
  int xkb_base;
  bool mod_pressed = 0;
  
  /* Event watchers, to interact with the user */
  ev_prepare *xcb_prep;
  ev_io *xcb_io;
  ev_io *xkb_io;
  
  /* The name of current binding mode */
  static mode binding;
  
  /* Indicates whether a new binding mode was recently activated */
  bool activated_mode = false;
  
  /* The output in which the tray should be displayed. */
  static i3_output *output_for_tray;
  
  /* The parsed colors */
  struct xcb_colors_t {
      color_t bar_fg;
      color_t bar_bg;
      color_t sep_fg;
      color_t focus_bar_fg;
      color_t focus_bar_bg;
      color_t focus_sep_fg;
      color_t active_ws_fg;
      color_t active_ws_bg;
      color_t active_ws_border;
      color_t inactive_ws_fg;
      color_t inactive_ws_bg;
      color_t inactive_ws_border;
      color_t urgent_ws_bg;
      color_t urgent_ws_fg;
      color_t urgent_ws_border;
      color_t focus_ws_bg;
      color_t focus_ws_fg;
      color_t focus_ws_border;
      color_t binding_mode_bg;
      color_t binding_mode_fg;
      color_t binding_mode_border;
  };
  struct xcb_colors_t colors;
  
  /* Horizontal offset between a workspace label and button borders */
  static const int ws_hoff_px = 4;
  
  /* Vertical offset between a workspace label and button borders */
  static const int ws_voff_px = 3;
  
  /* Offset between two workspace buttons */
  static const int ws_spacing_px = 1;
  
  /* Offset between the statusline and 1) workspace buttons on the left
   *                                   2) the tray or screen edge on the right */
  static const int sb_hoff_px = 4;
  
  /* Additional offset between the tray and the statusline, if the tray is not empty */
  static const int tray_loff_px = 2;
  
  /* Vertical offset between the bar and a separator */
  static const int sep_voff_px = 4;
  
  /* Cached width of the custom separator if one was set */
  int separator_symbol_width;
  
  int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
      xcb_generic_error_t *err;
      if ((err = xcb_request_check(xcb_connection, cookie)) != NULL) {
          fprintf(stderr, "[%s:%d] ERROR: %s. X Error Code: %d\n", __FILE__, line, err_msg, err->error_code);
          return err->error_code;
      }
      return 0;
  }
  
  static uint32_t get_sep_offset(struct status_block *block) {
      if (!block->no_separator && block->sep_block_width > 0)
          return block->sep_block_width / 2 + block->sep_block_width % 2;
      return 0;
  }
  
  static int get_tray_width(struct tc_head *trayclients) {
      trayclient *trayclient;
      int tray_width = 0;
      TAILQ_FOREACH_REVERSE (trayclient, trayclients, tc_head, tailq) {
          if (!trayclient->mapped)
              continue;
          tray_width += icon_size + logical_px(config.tray_padding);
      }
      if (tray_width > 0)
          tray_width += logical_px(tray_loff_px);
      return tray_width;
  }
  
  /*
   * Draws a separator for the given block if necessary.
   *
   */
  static void draw_separator(i3_output *output, uint32_t x, struct status_block *block, bool use_focus_colors) {
      color_t sep_fg = (use_focus_colors ? colors.focus_sep_fg : colors.sep_fg);
      color_t bar_bg = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
  
      uint32_t sep_offset = get_sep_offset(block);
      if (TAILQ_NEXT(block, blocks) == NULL || sep_offset == 0)
          return;
  
      uint32_t center_x = x - sep_offset;
      if (config.separator_symbol == NULL) {
          /* Draw a classic one pixel, vertical separator. */
          draw_util_rectangle(&output->statusline_buffer, sep_fg,
                              center_x,
                              logical_px(sep_voff_px),
                              logical_px(1),
                              bar_height - 2 * logical_px(sep_voff_px));
      } else {
          /* Draw a custom separator. */
          uint32_t separator_x = MAX(x - block->sep_block_width, center_x - separator_symbol_width / 2);
          draw_util_text(config.separator_symbol, &output->statusline_buffer, sep_fg, bar_bg,
                         separator_x, logical_px(ws_voff_px), x - separator_x);
      }
  }
  
  static uint32_t predict_statusline_length(bool use_short_text) {
      uint32_t width = 0;
      struct status_block *block;
  
      TAILQ_FOREACH (block, &statusline_head, blocks) {
          i3String *text = block->full_text;
          struct status_block_render_desc *render = &block->full_render;
          if (use_short_text && block->short_text != NULL) {
              text = block->short_text;
              render = &block->short_render;
          }
  
          if (i3string_get_num_bytes(text) == 0)
              continue;
  
          render->width = predict_text_width(text);
          if (block->border)
              render->width += logical_px(block->border_left + block->border_right);
  
          /* Compute offset and append for text aligment in min_width. */
          if (block->min_width <= render->width) {
              render->x_offset = 0;
              render->x_append = 0;
          } else {
              uint32_t padding_width = block->min_width - render->width;
              switch (block->align) {
                  case ALIGN_LEFT:
                      render->x_append = padding_width;
                      break;
                  case ALIGN_RIGHT:
                      render->x_offset = padding_width;
                      break;
                  case ALIGN_CENTER:
                      render->x_offset = padding_width / 2;
                      render->x_append = padding_width / 2 + padding_width % 2;
                      break;
              }
          }
  
          width += render->width + render->x_offset + render->x_append;
  
          /* If this is not the last block, add some pixels for a separator. */
          if (TAILQ_NEXT(block, blocks) != NULL)
              width += block->sep_block_width;
      }
  
      return width;
  }
  
  /*
   * Redraws the statusline to the output's statusline_buffer
   */
  static void draw_statusline(i3_output *output, uint32_t clip_left, bool use_focus_colors, bool use_short_text) {
      struct status_block *block;
  
      color_t bar_color = (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg);
      draw_util_clear_surface(&output->statusline_buffer, bar_color);
  
      /* Use unsigned integer wraparound to clip off the left side.
       * For example, if clip_left is 75, then x will start at the very large
       * number INT_MAX-75, which is way outside the surface dimensions. Drawing
       * to that x position is a no-op which XCB and Cairo safely ignore. Once x moves
       * up by 75 and goes past INT_MAX, it will wrap around again to 0, and we start
       * actually rendering content to the surface. */
      uint32_t x = 0 - clip_left;
  
      /* Draw the text of each block */
      TAILQ_FOREACH (block, &statusline_head, blocks) {
          i3String *text = block->full_text;
          struct status_block_render_desc *render = &block->full_render;
          if (use_short_text && block->short_text != NULL) {
              text = block->short_text;
              render = &block->short_render;
          }
  
          if (i3string_get_num_bytes(text) == 0)
              continue;
  
          color_t fg_color;
          if (block->urgent) {
              fg_color = colors.urgent_ws_fg;
          } else if (block->color) {
              fg_color = draw_util_hex_to_color(block->color);
          } else if (use_focus_colors) {
              fg_color = colors.focus_bar_fg;
          } else {
              fg_color = colors.bar_fg;
          }
  
          color_t bg_color = bar_color;
  
          int full_render_width = render->width + render->x_offset + render->x_append;
          int has_border = block->border ? 1 : 0;
          if (block->border || block->background || block->urgent) {
              /* Let's determine the colors first. */
              color_t border_color = bar_color;
              if (block->urgent) {
                  border_color = colors.urgent_ws_border;
                  bg_color = colors.urgent_ws_bg;
              } else {
                  if (block->border)
                      border_color = draw_util_hex_to_color(block->border);
                  if (block->background)
                      bg_color = draw_util_hex_to_color(block->background);
              }
  
              /* Draw the border. */
              draw_util_rectangle(&output->statusline_buffer, border_color,
                                  x, logical_px(1),
                                  full_render_width,
                                  bar_height - logical_px(2));
  
              /* Draw the background. */
              draw_util_rectangle(&output->statusline_buffer, bg_color,
                                  x + has_border * logical_px(block->border_left),
                                  logical_px(1) + has_border * logical_px(block->border_top),
                                  full_render_width - has_border * logical_px(block->border_right + block->border_left),
                                  bar_height - has_border * logical_px(block->border_bottom + block->border_top) - logical_px(2));
          }
  
          draw_util_text(text, &output->statusline_buffer, fg_color, bg_color,
                         x + render->x_offset + has_border * logical_px(block->border_left),
                         bar_height / 2 - font.height / 2,
                         render->width - has_border * logical_px(block->border_left + block->border_right));
          x += full_render_width;
  
          /* If this is not the last block, draw a separator. */
          if (TAILQ_NEXT(block, blocks) != NULL) {
              x += block->sep_block_width;
              draw_separator(output, x, block, use_focus_colors);
          }
      }
  }
  
  /*
   * Hides all bars (unmaps them)
   *
   */
  static void hide_bars(void) {
      if ((config.hide_on_modifier == M_DOCK) || (config.hidden_state == S_SHOW && config.hide_on_modifier == M_HIDE)) {
          return;
      }
  
      i3_output *walk;
      SLIST_FOREACH (walk, outputs, slist) {
          if (!walk->active) {
              continue;
          }
          xcb_unmap_window(xcb_connection, walk->bar.id);
      }
      stop_child();
  }
  
  /*
   * Unhides all bars (maps them)
   *
   */
  static void unhide_bars(void) {
      if (config.hide_on_modifier != M_HIDE) {
          return;
      }
  
      i3_output *walk;
      xcb_void_cookie_t cookie;
      uint32_t mask;
      uint32_t values[5];
  
      cont_child();
  
      SLIST_FOREACH (walk, outputs, slist) {
          if (walk->bar.id == XCB_NONE) {
              continue;
          }
          mask = XCB_CONFIG_WINDOW_X |
                 XCB_CONFIG_WINDOW_Y |
                 XCB_CONFIG_WINDOW_WIDTH |
                 XCB_CONFIG_WINDOW_HEIGHT |
                 XCB_CONFIG_WINDOW_STACK_MODE;
          values[0] = walk->rect.x;
          if (config.position == POS_TOP)
              values[1] = walk->rect.y;
          else
              values[1] = walk->rect.y + walk->rect.h - bar_height;
          values[2] = walk->rect.w;
          values[3] = bar_height;
          values[4] = XCB_STACK_MODE_ABOVE;
          DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
          cookie = xcb_configure_window_checked(xcb_connection,
                                                walk->bar.id,
                                                mask,
                                                values);
  
          if (xcb_request_failed(cookie, "Could not reconfigure window")) {
              exit(EXIT_FAILURE);
          }
          xcb_map_window(xcb_connection, walk->bar.id);
      }
  }
  
  /*
   * Parse the colors into a format that we can use
   *
   */
  void init_colors(const struct xcb_color_strings_t *new_colors) {
  #define PARSE_COLOR(name, def)                                                           \
      do {                                                                                 \
          colors.name = draw_util_hex_to_color(new_colors->name ? new_colors->name : def); \
      } while (0)
      PARSE_COLOR(bar_fg, "#FFFFFF");
      PARSE_COLOR(bar_bg, "#000000");
      PARSE_COLOR(sep_fg, "#666666");
      PARSE_COLOR(active_ws_fg, "#FFFFFF");
      PARSE_COLOR(active_ws_bg, "#333333");
      PARSE_COLOR(active_ws_border, "#333333");
      PARSE_COLOR(inactive_ws_fg, "#888888");
      PARSE_COLOR(inactive_ws_bg, "#222222");
      PARSE_COLOR(inactive_ws_border, "#333333");
      PARSE_COLOR(urgent_ws_fg, "#FFFFFF");
      PARSE_COLOR(urgent_ws_bg, "#900000");
      PARSE_COLOR(urgent_ws_border, "#2f343a");
      PARSE_COLOR(focus_ws_fg, "#FFFFFF");
      PARSE_COLOR(focus_ws_bg, "#285577");
      PARSE_COLOR(focus_ws_border, "#4c7899");
  #undef PARSE_COLOR
  
  #define PARSE_COLOR_FALLBACK(name, fallback)                                                         \
      do {                                                                                             \
          colors.name = new_colors->name ? draw_util_hex_to_color(new_colors->name) : colors.fallback; \
      } while (0)
  
      /* For the binding mode indicator colors, we don't hardcode a default.
       * Instead, we fall back to urgent_ws_* colors. */
      PARSE_COLOR_FALLBACK(binding_mode_fg, urgent_ws_fg);
      PARSE_COLOR_FALLBACK(binding_mode_bg, urgent_ws_bg);
      PARSE_COLOR_FALLBACK(binding_mode_border, urgent_ws_border);
  
      /* Similarly, for unspecified focused bar colors, we fall back to the
       * regular bar colors. */
      PARSE_COLOR_FALLBACK(focus_bar_fg, bar_fg);
      PARSE_COLOR_FALLBACK(focus_bar_bg, bar_bg);
      PARSE_COLOR_FALLBACK(focus_sep_fg, sep_fg);
  #undef PARSE_COLOR_FALLBACK
  
      init_tray_colors();
      xcb_flush(xcb_connection);
  }
  
  static bool execute_custom_command(xcb_keycode_t input_code, bool event_is_release) {
      binding_t *binding;
      TAILQ_FOREACH (binding, &(config.bindings), bindings) {
          if ((binding->input_code != input_code) || (binding->release != event_is_release))
              continue;
  
          i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, binding->command);
          return true;
      }
      return false;
  }
  
  static void child_handle_button(xcb_button_press_event_t *event, i3_output *output, uint32_t statusline_x) {
      if (statusline_x > (uint32_t)output->statusline_width) {
          return;
      }
  
      /* x of the start of the current block relative to the statusline. */
      uint32_t last_block_x = 0;
      struct status_block *block;
      TAILQ_FOREACH (block, &statusline_head, blocks) {
          i3String *text;
          struct status_block_render_desc *render;
          if (output->statusline_short_text && block->short_text != NULL) {
              text = block->short_text;
              render = &block->short_render;
          } else {
              text = block->full_text;
              render = &block->full_render;
          }
  
          if (i3string_get_num_bytes(text) == 0) {
              continue;
          }
  
          /* Include the whole block in our calculations: when min_width is
           * specified, we have to take padding width into account. */
          const uint32_t full_render_width = render->width + render->x_offset + render->x_append;
          /* x of the click event relative to the current block. */
          const uint32_t relative_x = statusline_x - last_block_x;
          if (relative_x <= full_render_width) {
              send_block_clicked(event->detail, block->name, block->instance,
                                 event->root_x, event->root_y, relative_x,
                                 event->event_y, full_render_width, bar_height,
                                 event->state);
              return;
          }
  
          last_block_x += full_render_width + block->sep_block_width;
          if (last_block_x > statusline_x) {
              /* Click was on a separator. */
              return;
          }
      }
  }
  
  /*
   * Predict the width of a workspace button or the current binding mode indicator.
   *
   */
  static int predict_button_width(int name_width) {
      return MAX(name_width + 2 * logical_px(ws_hoff_px) + 2 * logical_px(1),
                 logical_px(config.ws_min_width));
  }
  
  /*
   * Handle a button press event (i.e. a mouse click on one of our bars).
   * We determine, whether the click occurred on a workspace button or if the scroll-
   * wheel was used and change the workspace appropriately
   *
   */
  static void handle_button(xcb_button_press_event_t *event) {
      /* Determine, which bar was clicked */
      i3_output *walk;
      xcb_window_t bar = event->event;
      SLIST_FOREACH (walk, outputs, slist) {
          if (walk->bar.id == bar) {
              break;
          }
      }
  
      if (walk == NULL) {
          DLOG("Unknown bar clicked!\n");
          return;
      }
  
      DLOG("Got button %d\n", event->detail);
  
      /* During button release events, only check for custom commands. */
      const bool event_is_release = (event->response_type & ~0x80) == XCB_BUTTON_RELEASE;
  
      int32_t x = event->event_x >= 0 ? event->event_x : 0;
      int workspace_width = 0;
      i3_ws *cur_ws = NULL, *clicked_ws = NULL, *ws_walk;
  
      TAILQ_FOREACH (ws_walk, walk->workspaces, tailq) {
          int w = predict_button_width(ws_walk->name_width);
          if (x >= workspace_width && x <= workspace_width + w)
              clicked_ws = ws_walk;
          if (ws_walk->visible)
              cur_ws = ws_walk;
          workspace_width += w;
          if (TAILQ_NEXT(ws_walk, tailq) != NULL)
              workspace_width += logical_px(ws_spacing_px);
      }
  
      if (child_want_click_events() && x > workspace_width) {
          const int tray_width = get_tray_width(walk->trayclients);
          /* Calculate the horizontal coordinate (x) of the start of the
           * statusline by subtracting its width and the width of the tray from
           * the bar width. */
          const int offset = walk->rect.w - walk->statusline_width -
                             tray_width - logical_px((tray_width > 0) * sb_hoff_px);
          if (x >= offset) {
              /* Click was after the start of the statusline, return to avoid
               * executing any other actions even if a click event is not
               * produced eventually. */
  
              if (!event_is_release) {
                  /* x of the click event relative to the start of the
                   * statusline. */
                  const uint32_t statusline_x = x - offset;
                  child_handle_button(event, walk, statusline_x);
              }
  
              return;
          }
      }
  
      /* If a custom command was specified for this mouse button, it overrides
       * the default behavior. */
      if (execute_custom_command(event->detail, event_is_release) || event_is_release) {
          return;
      }
  
      if (cur_ws == NULL) {
          DLOG("No workspace active?\n");
          return;
      }
      switch (event->detail) {
          case XCB_BUTTON_SCROLL_UP:
          case XCB_BUTTON_SCROLL_LEFT:
              /* Mouse wheel up. We select the previous ws, if any.
               * If there is no more workspace, don’t even send the workspace
               * command, otherwise (with workspace auto_back_and_forth) we’d end
               * up on the wrong workspace. */
              if (cur_ws == TAILQ_FIRST(walk->workspaces))
                  return;
  
              cur_ws = TAILQ_PREV(cur_ws, ws_head, tailq);
              break;
          case XCB_BUTTON_SCROLL_DOWN:
          case XCB_BUTTON_SCROLL_RIGHT:
              /* Mouse wheel down. We select the next ws, if any.
               * If there is no more workspace, don’t even send the workspace
               * command, otherwise (with workspace auto_back_and_forth) we’d end
               * up on the wrong workspace. */
              if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
                  return;
  
              cur_ws = TAILQ_NEXT(cur_ws, tailq);
              break;
          case 1:
              cur_ws = clicked_ws;
  
              /* if no workspace was clicked, focus our currently visible
               * workspace if it is not already focused */
              if (cur_ws == NULL) {
                  TAILQ_FOREACH (cur_ws, walk->workspaces, tailq) {
                      if (cur_ws->visible && !cur_ws->focused)
                          break;
                  }
              }
  
              /* if there is nothing to focus, we are done */
              if (cur_ws == NULL)
                  return;
  
              break;
          default:
              return;
      }
  
      /* To properly handle workspace names with double quotes in them, we need
       * to escape the double quotes. Unfortunately, that’s rather ugly in C: We
       * first count the number of double quotes, then we allocate a large enough
       * buffer, then we copy character by character. */
      int num_quotes = 0;
      size_t namelen = 0;
      const char *utf8_name = cur_ws->canonical_name;
      for (const char *walk = utf8_name; *walk != '\0'; walk++) {
          if (*walk == '"' || *walk == '\\')
              num_quotes++;
          /* While we’re looping through the name anyway, we can save one
           * strlen(). */
          namelen++;
      }
  
      const size_t len = namelen + strlen("workspace \"\"") + 1;
      char *buffer = scalloc(len + num_quotes, 1);
      memcpy(buffer, "workspace \"", strlen("workspace \""));
      size_t inpos, outpos;
      for (inpos = 0, outpos = strlen("workspace \"");
           inpos < namelen;
           inpos++, outpos++) {
          if (utf8_name[inpos] == '"' || utf8_name[inpos] == '\\') {
              buffer[outpos] = '\\';
              outpos++;
          }
          buffer[outpos] = utf8_name[inpos];
      }
      buffer[outpos] = '"';
      i3_send_msg(I3_IPC_MESSAGE_TYPE_RUN_COMMAND, buffer);
      free(buffer);
  }
  
  /*
   * Handle visibility notifications: when none of the bars are visible, e.g.
   * if windows are in fullscreen on each output, suspend the child process.
   *
   */
  static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
      bool visible = (event->state != XCB_VISIBILITY_FULLY_OBSCURED);
      int num_visible = 0;
      i3_output *output;
  
      SLIST_FOREACH (output, outputs, slist) {
          if (!output->active) {
              continue;
          }
          if (output->bar.id == event->window) {
              output->visible = visible;
          }
          num_visible += output->visible;
      }
  
      if (num_visible == 0) {
          stop_child();
      } else {
          cont_child();
      }
  }
  
  /*
   * Comparison function to sort trayclients in ascending alphanumeric order
   * according to their class.
   *
   */
  static int reorder_trayclients_cmp(const void *_a, const void *_b) {
      trayclient *a = *((trayclient **)_a);
      trayclient *b = *((trayclient **)_b);
  
      int result = strcasecmp_nullable(a->class_class, b->class_class);
      return result != 0 ? result : strcasecmp_nullable(a->class_instance, b->class_instance);
  }
  
  /*
   * Adjusts the size of the tray window and alignment of the tray clients by
   * configuring their respective x coordinates. To be called when mapping or
   * unmapping a tray client window.
   *
   */
  static void configure_trayclients(void) {
      i3_output *output;
      SLIST_FOREACH (output, outputs, slist) {
          if (!output->active) {
              continue;
          }
  
          int count = 0;
          trayclient *client;
          TAILQ_FOREACH (client, output->trayclients, tailq) {
              if (client->mapped) {
                  count++;
              }
          }
  
          int idx = 0;
          trayclient **trayclients = smalloc(count * sizeof(trayclient *));
          TAILQ_FOREACH (client, output->trayclients, tailq) {
              if (client->mapped) {
                  trayclients[idx++] = client;
              }
          }
  
          qsort(trayclients, count, sizeof(trayclient *), reorder_trayclients_cmp);
  
          uint32_t x = output->rect.w;
          for (idx = count; idx > 0; idx--) {
              x -= icon_size + logical_px(config.tray_padding);
  
              DLOG("Configuring tray window %08x to x=%d\n", trayclients[idx - 1]->win, x);
              xcb_configure_window(xcb_connection,
                                   trayclients[idx - 1]->win,
                                   XCB_CONFIG_WINDOW_X,
                                   &x);
          }
  
          free(trayclients);
      }
  }
  
  static trayclient *trayclient_and_output_from_window(xcb_window_t win, i3_output **output) {
      i3_output *o_walk;
      SLIST_FOREACH (o_walk, outputs, slist) {
          if (!o_walk->active) {
              continue;
          }
  
          trayclient *client;
          TAILQ_FOREACH (client, o_walk->trayclients, tailq) {
              if (client->win == win) {
                  if (output) {
                      *output = o_walk;
                  }
                  return client;
              }
          }
      }
      return NULL;
  }
  
  static trayclient *trayclient_from_window(xcb_window_t win) {
      return trayclient_and_output_from_window(win, NULL);
  }
  
  static void trayclient_update_class(trayclient *client) {
      xcb_get_property_reply_t *prop = xcb_get_property_reply(
          conn,
          xcb_get_property_unchecked(
              xcb_connection,
              false,
              client->win,
              XCB_ATOM_WM_CLASS,
              XCB_ATOM_STRING,
              0,
              32),
          NULL);
      if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
          DLOG("WM_CLASS not set.\n");
          free(prop);
          return;
      }
  
      /* We cannot use asprintf here since this property contains two
       * null-terminated strings (for compatibility reasons). Instead, we
       * use strdup() on both strings */
      const size_t prop_length = xcb_get_property_value_length(prop);
      char *new_class = xcb_get_property_value(prop);
      const size_t class_class_index = strnlen(new_class, prop_length) + 1;
  
      free(client->class_instance);
      free(client->class_class);
  
      client->class_instance = sstrndup(new_class, prop_length);
      if (class_class_index < prop_length) {
          client->class_class = sstrndup(new_class + class_class_index, prop_length - class_class_index);
      } else {
          client->class_class = NULL;
      }
      DLOG("WM_CLASS changed to %s (instance), %s (class)\n", client->class_instance, client->class_class);
  
      free(prop);
  }
  
  /*
   * Handles ClientMessages (messages sent from another client directly to us).
   *
   * At the moment, only the tray window will receive client messages. All
   * supported client messages currently are _NET_SYSTEM_TRAY_OPCODE.
   *
   */
  static void handle_client_message(xcb_client_message_event_t *event) {
      if (event->type == atoms[I3_SYNC]) {
          xcb_window_t window = event->data.data32[0];
          uint32_t rnd = event->data.data32[1];
          /* Forward the request to i3 via the IPC interface so that all pending
           * IPC messages are guaranteed to be handled. */
          char *payload = NULL;
          sasprintf(&payload, "{\"rnd\":%d, \"window\":%d}", rnd, window);
          i3_send_msg(I3_IPC_MESSAGE_TYPE_SYNC, payload);
          free(payload);
      } else if (event->type == atoms[_NET_SYSTEM_TRAY_OPCODE] &&
                 event->format == 32) {
          DLOG("_NET_SYSTEM_TRAY_OPCODE received\n");
          /* event->data.data32[0] is the timestamp */
          uint32_t op = event->data.data32[1];
          uint32_t mask;
          uint32_t values[2];
          if (op == SYSTEM_TRAY_REQUEST_DOCK) {
              xcb_window_t client = event->data.data32[2];
  
              mask = XCB_CW_EVENT_MASK;
  
              /* Needed to get the most recent value of XEMBED_MAPPED. */
              values[0] = XCB_EVENT_MASK_PROPERTY_CHANGE;
              /* Needed for UnmapNotify events. */
              values[0] |= XCB_EVENT_MASK_STRUCTURE_NOTIFY;
              /* Needed because some tray applications (e.g., VLC) use
               * override_redirect which causes no ConfigureRequest to be sent. */
              values[0] |= XCB_EVENT_MASK_RESIZE_REDIRECT;
  
              xcb_change_window_attributes(xcb_connection, client, mask, values);
  
              /* Request the _XEMBED_INFO property. The XEMBED specification
               * (which is referred by the tray specification) says this *has* to
               * be set, but VLC does not set it… */
              bool map_it = true;
              int xe_version = 1;
              xcb_get_property_cookie_t xembedc;
              xcb_generic_error_t *error;
              xembedc = xcb_get_property(xcb_connection,
                                         0,
                                         client,
                                         atoms[_XEMBED_INFO],
                                         XCB_GET_PROPERTY_TYPE_ANY,
                                         0,
                                         2 * 32);
  
              xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
                                                                         xembedc,
                                                                         &error);
              if (error != NULL) {
                  ELOG("Error getting _XEMBED_INFO property: error_code %d\n",
                       error->error_code);
                  free(error);
                  return;
              }
              if (xembedr != NULL && xembedr->length != 0) {
                  DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
                  uint32_t *xembed = xcb_get_property_value(xembedr);
                  DLOG("xembed version = %d\n", xembed[0]);
                  DLOG("xembed flags = %d\n", xembed[1]);
                  map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
                  xe_version = xembed[0];
                  if (xe_version > 1)
                      xe_version = 1;
                  free(xembedr);
              } else {
                  ELOG("Window %08x violates the XEMBED protocol, _XEMBED_INFO not set\n", client);
              }
  
              DLOG("X window %08x requested docking\n", client);
  
              if (output_for_tray == NULL) {
                  ELOG("No output found for tray\n");
                  return;
              }
  
              xcb_void_cookie_t rcookie = xcb_reparent_window(xcb_connection,
                                                              client,
                                                              output_for_tray->bar.id,
                                                              output_for_tray->rect.w - icon_size - logical_px(config.tray_padding),
                                                              logical_px(config.tray_padding));
              if (xcb_request_failed(rcookie, "Could not reparent window. Maybe it is using an incorrect depth/visual?"))
                  return;
  
              /* We reconfigure the window to use a reasonable size. The systray
               * specification explicitly says:
               *   Tray icons may be assigned any size by the system tray, and
               *   should do their best to cope with any size effectively
               */
              mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
              values[0] = icon_size;
              values[1] = icon_size;
              xcb_configure_window(xcb_connection,
                                   client,
                                   mask,
                                   values);
  
              /* send the XEMBED_EMBEDDED_NOTIFY message */
              void *event = scalloc(32, 1);
              xcb_client_message_event_t *ev = event;
              ev->response_type = XCB_CLIENT_MESSAGE;
              ev->window = client;
              ev->type = atoms[_XEMBED];
              ev->format = 32;
              ev->data.data32[0] = XCB_CURRENT_TIME;
              ev->data.data32[1] = XEMBED_EMBEDDED_NOTIFY;
              ev->data.data32[2] = output_for_tray->bar.id;
              ev->data.data32[3] = xe_version;
              xcb_send_event(xcb_connection,
                             0,
                             client,
                             XCB_EVENT_MASK_NO_EVENT,
                             (char *)ev);
              free(event);
  
              /* Put the client inside the save set. Upon termination (whether
               * killed or normal exit does not matter) of i3bar, these clients
               * will be correctly reparented to their most closest living
               * ancestor. Without this, tray icons might die when i3bar
               * exits/crashes. */
              xcb_change_save_set(xcb_connection, XCB_SET_MODE_INSERT, client);
  
              trayclient *tc = scalloc(1, sizeof(trayclient));
              tc->win = client;
              tc->xe_version = xe_version;
              tc->mapped = false;
              TAILQ_INSERT_TAIL(output_for_tray->trayclients, tc, tailq);
              trayclient_update_class(tc);
  
              if (map_it) {
                  DLOG("Mapping dock client\n");
                  xcb_map_window(xcb_connection, client);
              } else {
                  DLOG("Not mapping dock client yet\n");
              }
              /* Trigger an update to copy the statusline text to the appropriate
               * position */
              configure_trayclients();
              draw_bars(false);
          }
      }
  }
  
  /*
   * Handles DestroyNotify events by removing the tray client from the data
   * structure. According to the XEmbed protocol, this is one way for a tray
   * client to finish the protocol. After this event is received, there is no
   * further interaction with the tray client.
   *
   * See: https://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
   *
   */
  static void handle_destroy_notify(xcb_destroy_notify_event_t *event) {
      DLOG("DestroyNotify for window = %08x, event = %08x\n", event->window, event->event);
  
      i3_output *output;
      trayclient *client = trayclient_and_output_from_window(event->window, &output);
      if (!client) {
          DLOG("WARNING: Could not find corresponding tray window.\n");
          return;
      }
  
      DLOG("Removing tray client with window ID %08x\n", event->window);
      TAILQ_REMOVE(output->trayclients, client, tailq);
      free(client->class_class);
      free(client->class_instance);
      FREE(client);
  
      /* Trigger an update, we now have more space for the statusline */
      configure_trayclients();
      draw_bars(false);
  }
  
  /*
   * Handles MapNotify events. These events happen when a tray client shows its
   * window. We respond by realigning the tray clients.
   *
   */
  static void handle_map_notify(xcb_map_notify_event_t *event) {
      DLOG("MapNotify for window = %08x, event = %08x\n", event->window, event->event);
  
      trayclient *client = trayclient_from_window(event->window);
      if (!client) {
          DLOG("WARNING: Could not find corresponding tray window.\n");
          return;
      }
  
      DLOG("Tray client mapped (window ID %08x). Adjusting tray.\n", event->window);
      client->mapped = true;
  
      /* Trigger an update, we now have one extra tray client. */
      configure_trayclients();
      draw_bars(false);
  }
  /*
   * Handles UnmapNotify events. These events happen when a tray client hides its
   * window. We respond by realigning the tray clients.
   *
   */
  static void handle_unmap_notify(xcb_unmap_notify_event_t *event) {
      DLOG("UnmapNotify for window = %08x, event = %08x\n", event->window, event->event);
  
      trayclient *client = trayclient_from_window(event->window);
      if (!client) {
          DLOG("WARNING: Could not find corresponding tray window.\n");
          return;
      }
  
      DLOG("Tray client unmapped (window ID %08x). Adjusting tray.\n", event->window);
      client->mapped = false;
  
      /* Trigger an update, we now have more space for the statusline */
      configure_trayclients();
      draw_bars(false);
  }
  
  /*
   * Handle PropertyNotify messages.
   *
   */
  static void handle_property_notify(xcb_property_notify_event_t *event) {
      DLOG("PropertyNotify\n");
      if (event->atom == atoms[_XEMBED_INFO] &&
          event->state == XCB_PROPERTY_NEW_VALUE) {
          /* _XEMBED_INFO property tells us whether a dock client should be mapped or unmapped. */
          DLOG("xembed_info updated\n");
  
          trayclient *client = trayclient_from_window(event->window);
          if (!client) {
              ELOG("PropertyNotify received for unknown window %08x\n", event->window);
              return;
          }
  
          xcb_get_property_cookie_t xembedc;
          xembedc = xcb_get_property_unchecked(xcb_connection,
                                               0,
                                               client->win,
                                               atoms[_XEMBED_INFO],
                                               XCB_GET_PROPERTY_TYPE_ANY,
                                               0,
                                               2 * 32);
  
          xcb_get_property_reply_t *xembedr = xcb_get_property_reply(xcb_connection,
                                                                     xembedc,
                                                                     NULL);
          if (xembedr == NULL || xembedr->length == 0) {
              DLOG("xembed_info unset\n");
              return;
          }
  
          DLOG("xembed format = %d, len = %d\n", xembedr->format, xembedr->length);
          uint32_t *xembed = xcb_get_property_value(xembedr);
          DLOG("xembed version = %d\n", xembed[0]);
          DLOG("xembed flags = %d\n", xembed[1]);
          bool map_it = ((xembed[1] & XEMBED_MAPPED) == XEMBED_MAPPED);
          DLOG("map state now %d\n", map_it);
          if (client->mapped && !map_it) {
              /* need to unmap the window */
              xcb_unmap_window(xcb_connection, client->win);
          } else if (!client->mapped && map_it) {
              /* need to map the window */
              xcb_map_window(xcb_connection, client->win);
          }
          free(xembedr);
      } else if (event->atom == XCB_ATOM_WM_CLASS) {
          trayclient *client = trayclient_from_window(event->window);
          if (client) {
              trayclient_update_class(client);
          }
      }
  }
  
  /*
   * If a tray client attempts to change its size we deny the request and respond
   * by telling it its actual size.
   *
   */
  static void handle_configuration_change(xcb_window_t window) {
      trayclient *trayclient;
      i3_output *output;
      SLIST_FOREACH (output, outputs, slist) {
          if (!output->active)
              continue;
  
          int clients = 0;
          TAILQ_FOREACH_REVERSE (trayclient, output->trayclients, tc_head, tailq) {
              if (!trayclient->mapped)
                  continue;
              clients++;
  
              if (trayclient->win != window)
                  continue;
  
              xcb_rectangle_t rect;
              rect.x = output->rect.w - (clients * (icon_size + logical_px(config.tray_padding)));
              rect.y = logical_px(config.tray_padding);
              rect.width = icon_size;
              rect.height = icon_size;
  
              DLOG("This is a tray window. x = %d\n", rect.x);
              fake_configure_notify(xcb_connection, rect, window, 0);
              return;
          }
      }
  
      DLOG("WARNING: Could not find corresponding tray window.\n");
  }
  
  static void handle_configure_request(xcb_configure_request_event_t *event) {
      DLOG("ConfigureRequest for window = %08x\n", event->window);
      handle_configuration_change(event->window);
  }
  
  static void handle_resize_request(xcb_resize_request_event_t *event) {
      DLOG("ResizeRequest for window = %08x\n", event->window);
      handle_configuration_change(event->window);
  }
  
  /*
   * This function is called immediately before the main loop locks. We check for
   * events from X11, handle them, then flush our outgoing queue.
   *
   */
  static void xcb_prep_cb(struct ev_loop *loop, ev_prepare *watcher, int revents) {
      xcb_generic_event_t *event;
  
      if (xcb_connection_has_error(xcb_connection)) {
          ELOG("X11 connection was closed unexpectedly - maybe your X server terminated / crashed?\n");
  #ifdef I3_ASAN_ENABLED
          __lsan_do_leak_check();
  #endif
          exit(1);
      }
  
      while ((event = xcb_poll_for_event(xcb_connection)) != NULL) {
          if (event->response_type == 0) {
              xcb_generic_error_t *error = (xcb_generic_error_t *)event;
              DLOG("Received X11 error, sequence 0x%x, error_code = %d\n", error->sequence, error->error_code);
              free(event);
              continue;
          }
  
          int type = (event->response_type & ~0x80);
  
          if (type == xkb_base && xkb_base > -1) {
              DLOG("received an xkb event\n");
  
              xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
              const uint32_t mod = (config.modifier & 0xFFFF);
              const bool new_mod_pressed = (mod != 0 && (state->mods & mod) == mod);
              if (new_mod_pressed != mod_pressed) {
                  mod_pressed = new_mod_pressed;
                  if (state->xkbType == XCB_XKB_STATE_NOTIFY && config.modifier != XCB_NONE) {
                      if (mod_pressed) {
                          activated_mode = false;
                          unhide_bars();
                      } else if (!activated_mode) {
                          hide_bars();
                      }
                  }
              }
  
              free(event);
              continue;
          }
  
          switch (type) {
              case XCB_VISIBILITY_NOTIFY:
                  /* Visibility change: a bar is [un]obscured by other window */
                  handle_visibility_notify((xcb_visibility_notify_event_t *)event);
                  break;
              case XCB_EXPOSE:
                  if (((xcb_expose_event_t *)event)->count == 0) {
                      /* Expose-events happen, when the window needs to be redrawn */
                      redraw_bars();
                  }
  
                  break;
              case XCB_BUTTON_RELEASE:
              case XCB_BUTTON_PRESS:
                  /* Button press events are mouse buttons clicked on one of our bars */
                  handle_button((xcb_button_press_event_t *)event);
                  break;
              case XCB_CLIENT_MESSAGE:
                  /* Client messages are used for client-to-client communication, for
                   * example system tray widgets talk to us directly via client messages. */
                  handle_client_message((xcb_client_message_event_t *)event);
                  break;
              case XCB_DESTROY_NOTIFY:
                  /* DestroyNotify signifies the end of the XEmbed protocol */
                  handle_destroy_notify((xcb_destroy_notify_event_t *)event);
                  break;
              case XCB_UNMAP_NOTIFY:
                  /* UnmapNotify is received when a tray client hides its window. */
                  handle_unmap_notify((xcb_unmap_notify_event_t *)event);
                  break;
              case XCB_MAP_NOTIFY:
                  handle_map_notify((xcb_map_notify_event_t *)event);
                  break;
              case XCB_PROPERTY_NOTIFY:
                  /* PropertyNotify */
                  handle_property_notify((xcb_property_notify_event_t *)event);
                  break;
              case XCB_CONFIGURE_REQUEST:
                  /* ConfigureRequest, sent by a tray child */
                  handle_configure_request((xcb_configure_request_event_t *)event);
                  break;
              case XCB_RESIZE_REQUEST:
                  /* ResizeRequest sent by a tray child using override_redirect. */
                  handle_resize_request((xcb_resize_request_event_t *)event);
                  break;
          }
          free(event);
      }
  
      xcb_flush(xcb_connection);
  }
  
  /*
   * Dummy callback. We only need this, so that the prepare and check watchers
   * are triggered
   *
   */
  static void xcb_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
  }
  
  /*
   * Early initialization of the connection to X11: Everything which does not
   * depend on 'config'.
   *
   */
  char *init_xcb_early(void) {
      /* FIXME: xcb_connect leaks memory */
      xcb_connection = xcb_connect(NULL, &screen);
      if (xcb_connection_has_error(xcb_connection)) {
          ELOG("Cannot open display\n");
          exit(EXIT_FAILURE);
      }
      conn = xcb_connection;
      DLOG("Connected to xcb\n");
  
  /* We have to request the atoms we need */
  #define ATOM_DO(name) atom_cookies[name] = xcb_intern_atom(xcb_connection, 0, strlen(#name), #name);
  #include "xcb_atoms.def"
  
      root_screen = xcb_aux_get_screen(xcb_connection, screen);
      xcb_root = root_screen->root;
  
      depth = root_screen->root_depth;
      colormap = root_screen->default_colormap;
      visual_type = config.transparency ? xcb_aux_find_visual_by_attrs(root_screen, -1, 32) : NULL;
      if (visual_type != NULL) {
          depth = xcb_aux_get_depth_of_visual(root_screen, visual_type->visual_id);
          colormap = xcb_generate_id(xcb_connection);
          xcb_void_cookie_t cm_cookie = xcb_create_colormap_checked(xcb_connection,
                                                                    XCB_COLORMAP_ALLOC_NONE,
                                                                    colormap,
                                                                    xcb_root,
                                                                    visual_type->visual_id);
          if (xcb_request_failed(cm_cookie, "Could not allocate colormap")) {
              exit(EXIT_FAILURE);
          }
      } else {
          visual_type = get_visualtype(root_screen);
      }
  
      xcb_cursor_context_t *cursor_ctx;
      if (xcb_cursor_context_new(conn, root_screen, &cursor_ctx) < 0) {
          errx(EXIT_FAILURE, "Cannot allocate xcursor context");
      }
      cursor = xcb_cursor_load_cursor(cursor_ctx, "left_ptr");
      xcb_cursor_context_free(cursor_ctx);
  
      /* The various watchers to communicate with xcb */
      xcb_io = smalloc(sizeof(ev_io));
      xcb_prep = smalloc(sizeof(ev_prepare));
  
      ev_io_init(xcb_io, &xcb_io_cb, xcb_get_file_descriptor(xcb_connection), EV_READ);
      ev_prepare_init(xcb_prep, &xcb_prep_cb);
  
      ev_io_start(main_loop, xcb_io);
      ev_prepare_start(main_loop, xcb_prep);
  
      /* Now we get the atoms and save them in a nice data structure */
      get_atoms();
  
      char *path = root_atom_contents("I3_SOCKET_PATH", xcb_connection, screen);
  
      return path;
  }
  
  /*
   * Register for xkb keyevents. To grab modifiers without blocking other applications from receiving key events
   * involving that modifier, we sadly have to use xkb which is not yet fully supported
   * in xcb.
   *
   */
  static void register_xkb_keyevents(void) {
      const xcb_query_extension_reply_t *extreply;
      extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
      if (!extreply->present) {
          ELOG("xkb is not present on this server\n");
          exit(EXIT_FAILURE);
      }
      DLOG("initializing xcb-xkb\n");
      xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
      xcb_xkb_select_events(conn,
                            XCB_XKB_ID_USE_CORE_KBD,
                            XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
                            0,
                            XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
                            0xff,
                            0xff,
                            NULL);
      xkb_base = extreply->first_event;
  }
  
  /*
   * Deregister from xkb keyevents.
   *
   */
  static void deregister_xkb_keyevents(void) {
      xcb_xkb_select_events(conn,
                            XCB_XKB_ID_USE_CORE_KBD,
                            0,
                            0,
                            0,
                            0xff,
                            0xff,
                            NULL);
  }
  
  /*
   * Initialization which depends on 'config' being usable. Called after the
   * configuration has arrived.
   *
   */
  void init_xcb_late(char *fontname) {
      if (fontname == NULL)
          fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
  
      /* Load the font */
      font = load_font(fontname, true);
      set_font(&font);
      DLOG("Calculated font height: %d\n", font.height);
      bar_height = font.height + 2 * logical_px(ws_voff_px);
      icon_size = bar_height - 2 * logical_px(config.tray_padding);
  
      if (config.separator_symbol)
          separator_symbol_width = predict_text_width(config.separator_symbol);
  
      xcb_flush(xcb_connection);
  
      if (config.hide_on_modifier == M_HIDE)
          register_xkb_keyevents();
  }
  
  /*
   * Inform clients waiting for a new _NET_SYSTEM_TRAY that we took the
   * selection.
   *
   */
  static void send_tray_clientmessage(void) {
      uint8_t buffer[32] = {0};
      xcb_client_message_event_t *ev = (xcb_client_message_event_t *)buffer;
  
      ev->response_type = XCB_CLIENT_MESSAGE;
      ev->window = xcb_root;
      ev->type = atoms[MANAGER];
      ev->format = 32;
      ev->data.data32[0] = XCB_CURRENT_TIME;
      ev->data.data32[1] = tray_reply->atom;
      ev->data.data32[2] = selwin;
  
      xcb_send_event(xcb_connection,
                     0,
                     xcb_root,
                     0xFFFFFF,
                     (char *)buffer);
  }
  
  /*
   * Initializes tray support by requesting the appropriate _NET_SYSTEM_TRAY atom
   * for the X11 display we are running on, then acquiring the selection for this
   * atom. Afterwards, tray clients will send ClientMessages to our window.
   *
   */
  static void init_tray(void) {
      DLOG("Initializing system tray functionality\n");
      /* request the tray manager atom for the X11 display we are running on */
      char atomname[strlen("_NET_SYSTEM_TRAY_S") + 11];
      snprintf(atomname, strlen("_NET_SYSTEM_TRAY_S") + 11, "_NET_SYSTEM_TRAY_S%d", screen);
      xcb_intern_atom_cookie_t tray_cookie;
      if (tray_reply == NULL)
          tray_cookie = xcb_intern_atom(xcb_connection, 0, strlen(atomname), atomname);
  
      /* tray support: we need a window to own the selection */
      selwin = xcb_generate_id(xcb_connection);
      uint32_t selmask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_COLORMAP;
      uint32_t selval[] = {root_screen->black_pixel, root_screen->black_pixel, 1, colormap};
      xcb_create_window(xcb_connection,
                        depth,
                        selwin,
                        xcb_root,
                        -1, -1,
                        1, 1,
                        0,
                        XCB_WINDOW_CLASS_INPUT_OUTPUT,
                        visual_type->visual_id,
                        selmask,
                        selval);
  
      uint32_t orientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
      /* set the atoms */
      xcb_change_property(xcb_connection,
                          XCB_PROP_MODE_REPLACE,
                          selwin,
                          atoms[_NET_SYSTEM_TRAY_ORIENTATION],
                          XCB_ATOM_CARDINAL,
                          32,
                          1,
                          &orientation);
      xcb_change_property(xcb_connection,
                          XCB_PROP_MODE_REPLACE,
                          selwin,
                          atoms[_NET_SYSTEM_TRAY_VISUAL],
                          XCB_ATOM_VISUALID,
                          32,
                          1,
                          &visual_type->visual_id);
  
      init_tray_colors();
  
      if (tray_reply == NULL) {
          if (!(tray_reply = xcb_intern_atom_reply(xcb_connection, tray_cookie, NULL))) {
              ELOG("Could not get atom %s\n", atomname);
              exit(EXIT_FAILURE);
          }
      }
  
      xcb_set_selection_owner(xcb_connection,
                              selwin,
                              tray_reply->atom,
                              XCB_CURRENT_TIME);
  
      /* Verify that we have the selection */
      xcb_get_selection_owner_cookie_t selcookie;
      xcb_get_selection_owner_reply_t *selreply;
  
      selcookie = xcb_get_selection_owner(xcb_connection, tray_reply->atom);
      if (!(selreply = xcb_get_selection_owner_reply(xcb_connection, selcookie, NULL))) {
          ELOG("Could not get selection owner for %s\n", atomname);
          exit(EXIT_FAILURE);
      }
  
      if (selreply->owner != selwin) {
          ELOG("Could not set the %s selection. "
               "Maybe another tray is already running?\n",
               atomname);
          /* NOTE that this error is not fatal. We just can’t provide tray
           * functionality */
          free(selreply);
          return;
      }
  
      free(selreply);
  
      send_tray_clientmessage();
  }
  
  /*
   * We need to set the _NET_SYSTEM_TRAY_COLORS atom on the tray selection window
   * to make GTK+ 3 applets with symbolic icons visible. If the colors are unset,
   * they assume a light background.
   * See also https://bugzilla.gnome.org/show_bug.cgi?id=679591
   *
   */
  void init_tray_colors(void) {
      /* Convert colors.bar_fg (#rrggbb) to 16-bit RGB */
      const char *bar_fg = (config.colors.bar_fg ? config.colors.bar_fg : "#FFFFFF");
  
      DLOG("Setting bar_fg = %s as _NET_SYSTEM_TRAY_COLORS\n", bar_fg);
  
      char strgroups[3][3] = {{bar_fg[1], bar_fg[2], '\0'},
                              {bar_fg[3], bar_fg[4], '\0'},
                              {bar_fg[5], bar_fg[6], '\0'}};
      const uint8_t r = strtol(strgroups[0], NULL, 16);
      const uint8_t g = strtol(strgroups[1], NULL, 16);
      const uint8_t b = strtol(strgroups[2], NULL, 16);
  
      const uint16_t r16 = ((uint16_t)r << 8) | r;
      const uint16_t g16 = ((uint16_t)g << 8) | g;
      const uint16_t b16 = ((uint16_t)b << 8) | b;
  
      const uint32_t tray_colors[12] = {
          r16, g16, b16, /* foreground color */
          r16, g16, b16, /* error color */
          r16, g16, b16, /* warning color */
          r16, g16, b16, /* success color */
      };
  
      xcb_change_property(xcb_connection,
                          XCB_PROP_MODE_REPLACE,
                          selwin,
                          atoms[_NET_SYSTEM_TRAY_COLORS],
                          XCB_ATOM_CARDINAL,
                          32,
                          12,
                          tray_colors);
  }
  
  /*
   * Cleanup the xcb stuff.
   * Called once, before the program terminates.
   *
   */
  void clean_xcb(void) {
      free_outputs();
  
      free_font();
  
      xcb_free_cursor(xcb_connection, cursor);
      xcb_flush(xcb_connection);
      xcb_aux_sync(xcb_connection);
      xcb_disconnect(xcb_connection);
  
      ev_prepare_stop(main_loop, xcb_prep);
      ev_io_stop(main_loop, xcb_io);
  
      FREE(xcb_prep);
      FREE(xcb_io);
  }
  
  /*
   * Get the earlier requested atoms and save them in the prepared data structure
   *
   */
  void get_atoms(void) {
      xcb_intern_atom_reply_t *reply;
  #define ATOM_DO(name)                                                        \
      reply = xcb_intern_atom_reply(xcb_connection, atom_cookies[name], NULL); \
      if (reply == NULL) {                                                     \
          ELOG("Could not get atom %s\n", #name);                              \
          exit(EXIT_FAILURE);                                                  \
      }                                                                        \
      atoms[name] = reply->atom;                                               \
      free(reply);
  
  #include "xcb_atoms.def"
      DLOG("Got atoms\n");
  }
  
  /*
   * Reparents all tray clients of the specified output to the root window. This
   * is either used when shutting down, when an output appears (xrandr --output
   * VGA1 --off) or when the primary output changes.
   *
   * Applications using the tray will start the protocol from the beginning again
   * afterwards.
   *
   */
  void kick_tray_clients(i3_output *output) {
      if (TAILQ_EMPTY(output->trayclients))
          return;
  
      trayclient *trayclient;
      while (!TAILQ_EMPTY(output->trayclients)) {
          trayclient = TAILQ_FIRST(output->trayclients);
          /* Unmap, then reparent (to root) the tray client windows */
          xcb_unmap_window(xcb_connection, trayclient->win);
          xcb_reparent_window(xcb_connection,
                              trayclient->win,
                              xcb_root,
                              0,
                              0);
  
          free(trayclient->class_class);
          free(trayclient->class_instance);
  
          /* We remove the trayclient right here. We might receive an UnmapNotify
           * event afterwards, but better safe than sorry. */
          TAILQ_REMOVE(output->trayclients, trayclient, tailq);
          FREE(trayclient);
      }
  
      /* Fake a DestroyNotify so that Qt re-adds tray icons.
       * We cannot actually destroy the window because then Qt will not restore
       * its event mask on the new window. */
      uint8_t buffer[32] = {0};
      xcb_destroy_notify_event_t *event = (xcb_destroy_notify_event_t *)buffer;
  
      event->response_type = XCB_DESTROY_NOTIFY;
      event->event = selwin;
      event->window = selwin;
  
      xcb_send_event(conn, false, selwin, XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *)event);
  
      send_tray_clientmessage();
  }
  
  /*
   * Destroy the bar of the specified output
   *
   */
  void destroy_window(i3_output *output) {
      if (output == NULL || output->bar.id == XCB_NONE) {
          return;
      }
  
      kick_tray_clients(output);
  
      draw_util_surface_free(xcb_connection, &(output->bar));
      draw_util_surface_free(xcb_connection, &(output->buffer));
      draw_util_surface_free(xcb_connection, &(output->statusline_buffer));
      xcb_destroy_window(xcb_connection, output->bar.id);
      xcb_free_pixmap(xcb_connection, output->buffer.id);
      xcb_free_pixmap(xcb_connection, output->statusline_buffer.id);
      output->bar.id = XCB_NONE;
  
      kick_tray_clients(output);
  }
  
  /* Strut partial tells i3 where to reserve space for i3bar. This is determined
   * by the `position` bar config directive. */
  static xcb_void_cookie_t config_strut_partial(i3_output *output) {
      /* A local struct to save the strut_partial property */
      struct {
          uint32_t left;
          uint32_t right;
          uint32_t top;
          uint32_t bottom;
          uint32_t left_start_y;
          uint32_t left_end_y;
          uint32_t right_start_y;
          uint32_t right_end_y;
          uint32_t top_start_x;
          uint32_t top_end_x;
          uint32_t bottom_start_x;
          uint32_t bottom_end_x;
      } __attribute__((__packed__)) strut_partial;
      memset(&strut_partial, 0, sizeof(strut_partial));
  
      switch (config.position) {
          case POS_NONE:
              break;
          case POS_TOP:
              strut_partial.top = bar_height;
              strut_partial.top_start_x = output->rect.x;
              strut_partial.top_end_x = output->rect.x + output->rect.w;
              break;
          case POS_BOT:
              strut_partial.bottom = bar_height;
              strut_partial.bottom_start_x = output->rect.x;
              strut_partial.bottom_end_x = output->rect.x + output->rect.w;
              break;
      }
      return xcb_change_property(xcb_connection,
                                 XCB_PROP_MODE_REPLACE,
                                 output->bar.id,
                                 atoms[_NET_WM_STRUT_PARTIAL],
                                 XCB_ATOM_CARDINAL,
                                 32,
                                 12,
                                 &strut_partial);
  }
  
  /*
   * Returns the output which should hold the tray, if one exists.
   *
   * An output is returned in these scenarios:
   *   1. A specific output was listed in tray_outputs which is also in the list
   *   of outputs managed by this bar.
   *   2. No tray_output directive was specified. In this case, we use the first
   *   available output.
   *   3. 'tray_output primary' was specified. In this case we use the primary
   *   output.
   *
   * Three scenarios in which we specifically don't want to use a tray:
   *   1. 'tray_output none' was specified.
   *   2. A specific output was listed as a tray_output, but is not one of the
   *   outputs managed by this bar. For example, consider tray_outputs == [VGA-1],
   *   but outputs == [HDMI-1].
   *   3. 'tray_output primary' was specified and no output in the list is
   *   primary.
   */
  static i3_output *get_tray_output(void) {
      i3_output *output = NULL;
      if (TAILQ_EMPTY(&(config.tray_outputs))) {
          /* No tray_output specified, use first active output. */
          SLIST_FOREACH (output, outputs, slist) {
              if (output->active) {
                  return output;
              }
          }
          return NULL;
      } else if (strcasecmp(TAILQ_FIRST(&(config.tray_outputs))->output, "none") == 0) {
          /* Check for "tray_output none" */
          return NULL;
      }
  
      /* If one or more tray_output assignments were specified, we ensure that at
       * least one of them is actually an output managed by this instance. */
      tray_output_t *tray_output;
      TAILQ_FOREACH (tray_output, &(config.tray_outputs), tray_outputs) {
          SLIST_FOREACH (output, outputs, slist) {
              if (output->active &&
                  (strcasecmp(output->name, tray_output->output) == 0 ||
                   (strcasecmp(tray_output->output, "primary") == 0 && output->primary))) {
                  return output;
              }
          }
      }
  
      return NULL;
  }
  
  /*
   * Reconfigure all bars and create new bars for recently activated outputs
   *
   */
  void reconfig_windows(bool redraw_bars) {
      uint32_t mask;
      uint32_t values[6];
  
      i3_output *walk;
      SLIST_FOREACH (walk, outputs, slist) {
          if (!walk->active) {
              /* If an output is not active, we destroy its bar */
              /* FIXME: Maybe we rather want to unmap? */
              DLOG("Destroying window for output %s\n", walk->name);
              destroy_window(walk);
              continue;
          }
          if (walk->bar.id == XCB_NONE) {
              DLOG("Creating window for output %s\n", walk->name);
  
              xcb_window_t bar_id = xcb_generate_id(xcb_connection);
              xcb_pixmap_t buffer_id = xcb_generate_id(xcb_connection);
              xcb_pixmap_t statusline_buffer_id = xcb_generate_id(xcb_connection);
              mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP | XCB_CW_CURSOR;
  
              values[0] = colors.bar_bg.colorpixel;
              values[1] = root_screen->black_pixel;
              /* If hide_on_modifier is set to hide or invisible mode, i3 is not supposed to manage our bar windows */
              values[2] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
              /* We enable the following EventMask fields:
               * EXPOSURE, to get expose events (we have to re-draw then)
               * SUBSTRUCTURE_REDIRECT, to get ConfigureRequests when the tray
               *                        child windows use ConfigureWindow
               * BUTTON_PRESS, to handle clicks on the workspace buttons
               * */
              values[3] = XCB_EVENT_MASK_EXPOSURE |
                          XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT |
                          XCB_EVENT_MASK_BUTTON_PRESS |
                          XCB_EVENT_MASK_BUTTON_RELEASE;
              if (config.hide_on_modifier == M_DOCK) {
                  /* If the bar is normally visible, catch visibility change events to suspend
                   * the status process when the bar is obscured by full-screened windows.  */
                  values[3] |= XCB_EVENT_MASK_VISIBILITY_CHANGE;
                  walk->visible = true;
              }
              values[4] = colormap;
              values[5] = cursor;
  
              xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
                                                                       depth,
                                                                       bar_id,
                                                                       xcb_root,
                                                                       walk->rect.x, walk->rect.y + walk->rect.h - bar_height,
                                                                       walk->rect.w, bar_height,
                                                                       0,
                                                                       XCB_WINDOW_CLASS_INPUT_OUTPUT,
                                                                       visual_type->visual_id,
                                                                       mask,
                                                                       values);
  
              /* The double-buffer we use to render stuff off-screen */
              xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
                                                                      depth,
                                                                      buffer_id,
                                                                      bar_id,
                                                                      walk->rect.w,
                                                                      bar_height);
  
              /* The double-buffer we use to render the statusline before copying to buffer */
              xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
                                                                        depth,
                                                                        statusline_buffer_id,
                                                                        bar_id,
                                                                        walk->rect.w,
                                                                        bar_height);
  
              /* Set the WM_CLASS and WM_NAME (we don't need UTF-8) atoms */
              char *class;
              int len = sasprintf(&class, "%s%ci3bar%c", config.bar_id, 0, 0);
              xcb_void_cookie_t class_cookie;
              class_cookie = xcb_change_property(xcb_connection,
                                                 XCB_PROP_MODE_REPLACE,
                                                 bar_id,
                                                 XCB_ATOM_WM_CLASS,
                                                 XCB_ATOM_STRING,
                                                 8,
                                                 len,
                                                 class);
  
              char *name;
              sasprintf(&name, "i3bar for output %s", walk->name);
              xcb_void_cookie_t name_cookie;
              name_cookie = xcb_change_property(xcb_connection,
                                                XCB_PROP_MODE_REPLACE,
                                                bar_id,
                                                XCB_ATOM_WM_NAME,
                                                XCB_ATOM_STRING,
                                                8,
                                                strlen(name),
                                                name);
              free(name);
  
              /* We want dock windows (for now). When override_redirect is set, i3 is ignoring
               * this one */
              xcb_void_cookie_t dock_cookie = xcb_change_property(xcb_connection,
                                                                  XCB_PROP_MODE_REPLACE,
                                                                  bar_id,
                                                                  atoms[_NET_WM_WINDOW_TYPE],
                                                                  XCB_ATOM_ATOM,
                                                                  32,
                                                                  1,
                                                                  (unsigned char *)&atoms[_NET_WM_WINDOW_TYPE_DOCK]);
  
              draw_util_surface_init(xcb_connection, &walk->bar, bar_id, NULL, walk->rect.w, bar_height);
              draw_util_surface_init(xcb_connection, &walk->buffer, buffer_id, NULL, walk->rect.w, bar_height);
              draw_util_surface_init(xcb_connection, &walk->statusline_buffer, statusline_buffer_id, NULL, walk->rect.w, bar_height);
  
              xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
  
              /* We finally map the bar (display it on screen), unless the modifier-switch is on */
              xcb_void_cookie_t map_cookie;
              if (config.hide_on_modifier == M_DOCK) {
                  map_cookie = xcb_map_window_checked(xcb_connection, bar_id);
              }
  
              if (xcb_request_failed(win_cookie, "Could not create window") ||
                  xcb_request_failed(pm_cookie, "Could not create pixmap") ||
                  xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
                  xcb_request_failed(dock_cookie, "Could not set dock mode") ||
                  xcb_request_failed(class_cookie, "Could not set WM_CLASS") ||
                  xcb_request_failed(name_cookie, "Could not set WM_NAME") ||
                  xcb_request_failed(strut_cookie, "Could not set strut") ||
                  ((config.hide_on_modifier == M_DOCK) && xcb_request_failed(map_cookie, "Could not map window"))) {
                  exit(EXIT_FAILURE);
              }
  
          } else {
              /* We already have a bar, so we just reconfigure it */
              mask = XCB_CONFIG_WINDOW_X |
                     XCB_CONFIG_WINDOW_Y |
                     XCB_CONFIG_WINDOW_WIDTH |
                     XCB_CONFIG_WINDOW_HEIGHT |
                     XCB_CONFIG_WINDOW_STACK_MODE;
              values[0] = walk->rect.x;
              if (config.position == POS_TOP)
                  values[1] = walk->rect.y;
              else
                  values[1] = walk->rect.y + walk->rect.h - bar_height;
              values[2] = walk->rect.w;
              values[3] = bar_height;
              values[4] = XCB_STACK_MODE_ABOVE;
  
              DLOG("Reconfiguring strut partial property for output %s\n", walk->name);
              xcb_void_cookie_t strut_cookie = config_strut_partial(walk);
  
              DLOG("Destroying buffer for output %s\n", walk->name);
              xcb_free_pixmap(xcb_connection, walk->buffer.id);
  
              DLOG("Destroying statusline buffer for output %s\n", walk->name);
              xcb_free_pixmap(xcb_connection, walk->statusline_buffer.id);
  
              DLOG("Reconfiguring window for output %s to %d,%d\n", walk->name, values[0], values[1]);
              xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
                                                                          walk->bar.id,
                                                                          mask,
                                                                          values);
  
              mask = XCB_CW_OVERRIDE_REDIRECT;
              values[0] = (config.hide_on_modifier == M_DOCK ? 0 : 1);
              DLOG("Changing window attribute override_redirect for output %s to %d\n", walk->name, values[0]);
              xcb_void_cookie_t chg_cookie = xcb_change_window_attributes(xcb_connection,
                                                                          walk->bar.id,
                                                                          mask,
                                                                          values);
  
              DLOG("Recreating buffer for output %s\n", walk->name);
              xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
                                                                      depth,
                                                                      walk->buffer.id,
                                                                      walk->bar.id,
                                                                      walk->rect.w,
                                                                      bar_height);
  
              DLOG("Recreating statusline buffer for output %s\n", walk->name);
              xcb_void_cookie_t slpm_cookie = xcb_create_pixmap_checked(xcb_connection,
                                                                        depth,
                                                                        walk->statusline_buffer.id,
                                                                        walk->bar.id,
                                                                        walk->rect.w,
                                                                        bar_height);
  
              draw_util_surface_free(xcb_connection, &(walk->bar));
              draw_util_surface_free(xcb_connection, &(walk->buffer));
              draw_util_surface_free(xcb_connection, &(walk->statusline_buffer));
              draw_util_surface_init(xcb_connection, &(walk->bar), walk->bar.id, NULL, walk->rect.w, bar_height);
              draw_util_surface_init(xcb_connection, &(walk->buffer), walk->buffer.id, NULL, walk->rect.w, bar_height);
              draw_util_surface_init(xcb_connection, &(walk->statusline_buffer), walk->statusline_buffer.id, NULL, walk->rect.w, bar_height);
  
              xcb_void_cookie_t map_cookie, umap_cookie;
              if (redraw_bars) {
                  /* Unmap the window, and draw it again when in dock mode */
                  umap_cookie = xcb_unmap_window_checked(xcb_connection, walk->bar.id);
                  if (config.hide_on_modifier == M_DOCK) {
                      cont_child();
                      map_cookie = xcb_map_window_checked(xcb_connection, walk->bar.id);
                  } else {
                      stop_child();
                  }
  
                  if (config.hide_on_modifier == M_HIDE) {
                      /* Switching to hide mode, register for keyevents */
                      register_xkb_keyevents();
                  } else {
                      /* Switching to dock/invisible mode, deregister from keyevents */
                      deregister_xkb_keyevents();
                  }
              }
  
              if (xcb_request_failed(cfg_cookie, "Could not reconfigure window") ||
                  xcb_request_failed(chg_cookie, "Could not change window") ||
                  xcb_request_failed(pm_cookie, "Could not create pixmap") ||
                  xcb_request_failed(slpm_cookie, "Could not create statusline pixmap") ||
                  xcb_request_failed(strut_cookie, "Could not set strut") ||
                  (redraw_bars && (xcb_request_failed(umap_cookie, "Could not unmap window") ||
                                   (config.hide_on_modifier == M_DOCK && xcb_request_failed(map_cookie, "Could not map window"))))) {
                  exit(EXIT_FAILURE);
              }
          }
      }
  
      /* Finally, check if we want to initialize the tray or destroy the selection
       * window. The result of get_tray_output() is cached. */
      output_for_tray = get_tray_output();
      if (output_for_tray) {
          if (selwin == XCB_NONE) {
              init_tray();
          }
      } else if (selwin != XCB_NONE) {
          DLOG("Destroying tray selection window\n");
          xcb_destroy_window(xcb_connection, selwin);
          selwin = XCB_NONE;
      }
  }
  
  /*
   * Draw the button for a workspace or the current binding mode indicator.
   *
   */
  static void draw_button(surface_t *surface, color_t fg_color, color_t bg_color, color_t border_color,
                          int x, int width, int text_width, i3String *text) {
      int height = font.height + 2 * logical_px(ws_voff_px) - 2 * logical_px(1);
  
      /* Draw the border of the button. */
      draw_util_rectangle(surface, border_color, x, logical_px(1), width, height);
  
      /* Draw the inside of the button. */
      draw_util_rectangle(surface, bg_color, x + logical_px(1), 2 * logical_px(1),
                          width - 2 * logical_px(1), height - 2 * logical_px(1));
  
      draw_util_text(text, surface, fg_color, bg_color, x + (width - text_width) / 2,
                     logical_px(ws_voff_px), text_width);
  }
  
  /*
   * Render the bars, with buttons and statusline
   *
   */
  void draw_bars(bool unhide) {
      DLOG("Drawing bars...\n");
  
      uint32_t full_statusline_width = predict_statusline_length(false);
      uint32_t short_statusline_width = predict_statusline_length(true);
  
      i3_output *outputs_walk;
      SLIST_FOREACH (outputs_walk, outputs, slist) {
          int workspace_width = 0;
  
          if (!outputs_walk->active) {
              DLOG("Output %s inactive, skipping...\n", outputs_walk->name);
              continue;
          }
          if (outputs_walk->bar.id == XCB_NONE) {
              /* Oh shit, an active output without an own bar. Create it now! */
              reconfig_windows(false);
          }
  
          bool use_focus_colors = output_has_focus(outputs_walk);
  
          /* First things first: clear the backbuffer */
          draw_util_clear_surface(&(outputs_walk->buffer), (use_focus_colors ? colors.focus_bar_bg : colors.bar_bg));
  
          if (!config.disable_ws) {
              i3_ws *ws_walk;
              TAILQ_FOREACH (ws_walk, outputs_walk->workspaces, tailq) {
                  DLOG("Drawing button for WS %s at x = %d, len = %d\n",
                       i3string_as_utf8(ws_walk->name), workspace_width, ws_walk->name_width);
                  color_t fg_color = colors.inactive_ws_fg;
                  color_t bg_color = colors.inactive_ws_bg;
                  color_t border_color = colors.inactive_ws_border;
                  if (ws_walk->visible) {
                      if (!ws_walk->focused) {
                          fg_color = colors.active_ws_fg;
                          bg_color = colors.active_ws_bg;
                          border_color = colors.active_ws_border;
                      } else {
                          fg_color = colors.focus_ws_fg;
                          bg_color = colors.focus_ws_bg;
                          border_color = colors.focus_ws_border;
                      }
                  }
                  if (ws_walk->urgent) {
                      DLOG("WS %s is urgent!\n", i3string_as_utf8(ws_walk->name));
                      fg_color = colors.urgent_ws_fg;
                      bg_color = colors.urgent_ws_bg;
                      border_color = colors.urgent_ws_border;
                      unhide = true;
                  }
  
                  int w = predict_button_width(ws_walk->name_width);
                  draw_button(&(outputs_walk->buffer), fg_color, bg_color, border_color,
                              workspace_width, w, ws_walk->name_width, ws_walk->name);
  
                  workspace_width += w;
                  if (TAILQ_NEXT(ws_walk, tailq) != NULL)
                      workspace_width += logical_px(ws_spacing_px);
              }
          }
  
          if (binding.name && !config.disable_binding_mode_indicator) {
              workspace_width += logical_px(ws_spacing_px);
  
              int w = predict_button_width(binding.name_width);
              draw_button(&(outputs_walk->buffer), colors.binding_mode_fg, colors.binding_mode_bg,
                          colors.binding_mode_border, workspace_width, w, binding.name_width, binding.name);
  
              unhide = true;
              workspace_width += w;
          }
  
          if (!TAILQ_EMPTY(&statusline_head)) {
              DLOG("Printing statusline!\n");
  
              int tray_width = get_tray_width(outputs_walk->trayclients);
              uint32_t hoff = logical_px(((workspace_width > 0) + (tray_width > 0)) * sb_hoff_px);
              uint32_t max_statusline_width = outputs_walk->rect.w - workspace_width - tray_width - hoff;
              uint32_t clip_left = 0;
              uint32_t statusline_width = full_statusline_width;
              bool use_short_text = false;
  
              if (statusline_width > max_statusline_width) {
                  statusline_width = short_statusline_width;
                  use_short_text = true;
                  if (statusline_width > max_statusline_width) {
                      clip_left = statusline_width - max_statusline_width;
                  }
              }
  
              int16_t visible_statusline_width = MIN(statusline_width, max_statusline_width);
              int x_dest = outputs_walk->rect.w - tray_width - logical_px((tray_width > 0) * sb_hoff_px) - visible_statusline_width;
  
              draw_statusline(outputs_walk, clip_left, use_focus_colors, use_short_text);
              draw_util_copy_surface(&outputs_walk->statusline_buffer, &outputs_walk->buffer, 0, 0,
                                     x_dest, 0, visible_statusline_width, (int16_t)bar_height);
  
              outputs_walk->statusline_width = statusline_width;
              outputs_walk->statusline_short_text = use_short_text;
          }
      }
  
      /* Assure the bar is hidden/unhidden according to the specified hidden_state and mode */
      if (mod_pressed ||
          config.hidden_state == S_SHOW ||
          unhide) {
          unhide_bars();
      } else if (config.hide_on_modifier == M_HIDE) {
          hide_bars();
      }
  
      redraw_bars();
  }
  
  /*
   * Redraw the bars, i.e. simply copy the buffer to the barwindow
   *
   */
  void redraw_bars(void) {
      i3_output *outputs_walk;
      SLIST_FOREACH (outputs_walk, outputs, slist) {
          if (!outputs_walk->active) {
              continue;
          }
  
          draw_util_copy_surface(&(outputs_walk->buffer), &(outputs_walk->bar), 0, 0,
                                 0, 0, outputs_walk->rect.w, outputs_walk->rect.h);
          xcb_flush(xcb_connection);
      }
  }
  
  /*
   * Set the current binding mode
   *
   */
  void set_current_mode(struct mode *current) {
      I3STRING_FREE(binding.name);
      binding = *current;
      activated_mode = binding.name != NULL;
  }
  