text: /*
   * vim:ts=4:sw=4:expandtab
   *
   * i3 - an improved dynamic tiling window manager
   * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
   *
   * handlers.c: Small handlers for various events (keypresses, focus changes,
   *             …).
   *
   */
  #include "all.h"
  
  #include <sys/time.h>
  #include <time.h>
  
  #include <xcb/randr.h>
  #define SN_API_NOT_YET_FROZEN 1
  #include <libsn/sn-monitor.h>
  
  int randr_base = -1;
  int xkb_base = -1;
  int xkb_current_group;
  int shape_base = -1;
  
  /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
     since it’d trigger an infinite loop of switching between the different windows when
     changing workspaces */
  static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
  
  /*
   * Adds the given sequence to the list of events which are ignored.
   * If this ignore should only affect a specific response_type, pass
   * response_type, otherwise, pass -1.
   *
   * Every ignored sequence number gets garbage collected after 5 seconds.
   *
   */
  void add_ignore_event(const int sequence, const int response_type) {
      struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
  
      event->sequence = sequence;
      event->response_type = response_type;
      event->added = time(NULL);
  
      SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
  }
  
  /*
   * Checks if the given sequence is ignored and returns true if so.
   *
   */
  bool event_is_ignored(const int sequence, const int response_type) {
      struct Ignore_Event *event;
      time_t now = time(NULL);
      for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
          if ((now - event->added) > 5) {
              struct Ignore_Event *save = event;
              event = SLIST_NEXT(event, ignore_events);
              SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
              free(save);
          } else
              event = SLIST_NEXT(event, ignore_events);
      }
  
      SLIST_FOREACH (event, &ignore_events, ignore_events) {
          if (event->sequence != sequence)
              continue;
  
          if (event->response_type != -1 &&
              event->response_type != response_type)
              continue;
  
          /* instead of removing a sequence number we better wait until it gets
           * garbage collected. it may generate multiple events (there are multiple
           * enter_notifies for one configure_request, for example). */
          //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
          //free(event);
          return true;
      }
  
      return false;
  }
  
  /*
   * Called with coordinates of an enter_notify event or motion_notify event
   * to check if the user crossed virtual screen boundaries and adjust the
   * current workspace, if so.
   *
   */
  static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
      Output *output;
  
      /* If the user disable focus follows mouse, we have nothing to do here */
      if (config.disable_focus_follows_mouse)
          return;
  
      if ((output = get_output_containing(x, y)) == NULL) {
          ELOG("ERROR: No such screen\n");
          return;
      }
  
      if (output->con == NULL) {
          ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
          return;
      }
  
      /* Focus the output on which the user moved their cursor */
      Con *old_focused = focused;
      Con *next = con_descend_focused(output_get_content(output->con));
      /* Since we are switching outputs, this *must* be a different workspace, so
       * call workspace_show() */
      workspace_show(con_get_workspace(next));
      con_focus(next);
  
      /* If the focus changed, we re-render to get updated decorations */
      if (old_focused != focused)
          tree_render();
  }
  
  /*
   * When the user moves the mouse pointer onto a window, this callback gets called.
   *
   */
  static void handle_enter_notify(xcb_enter_notify_event_t *event) {
      Con *con;
  
      last_timestamp = event->time;
  
      DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
           event->event, event->mode, event->detail, event->sequence);
      DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
      if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
          DLOG("This was not a normal notify, ignoring\n");
          return;
      }
      /* Some events are not interesting, because they were not generated
       * actively by the user, but by reconfiguration of windows */
      if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
          DLOG("Event ignored\n");
          return;
      }
  
      bool enter_child = false;
      /* Get container by frame or by child window */
      if ((con = con_by_frame_id(event->event)) == NULL) {
          con = con_by_window_id(event->event);
          enter_child = true;
      }
  
      /* If we cannot find the container, the user moved their cursor to the root
       * window. In this case and if they used it to a dock, we need to focus the
       * workspace on the correct output. */
      if (con == NULL || con->parent->type == CT_DOCKAREA) {
          DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
          check_crossing_screen_boundary(event->root_x, event->root_y);
          return;
      }
  
      /* see if the user entered the window on a certain window decoration */
      layout_t layout = (enter_child ? con->parent->layout : con->layout);
      if (layout == L_DEFAULT) {
          Con *child;
          TAILQ_FOREACH_REVERSE (child, &(con->nodes_head), nodes_head, nodes) {
              if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
                  LOG("using child %p / %s instead!\n", child, child->name);
                  con = child;
                  break;
              }
          }
      }
  
      if (config.disable_focus_follows_mouse)
          return;
  
      /* if this container is already focused, there is nothing to do. */
      if (con == focused)
          return;
  
      /* Get the currently focused workspace to check if the focus change also
       * involves changing workspaces. If so, we need to call workspace_show() to
       * correctly update state and send the IPC event. */
      Con *ws = con_get_workspace(con);
      if (ws != con_get_workspace(focused))
          workspace_show(ws);
  
      focused_id = XCB_NONE;
      con_focus(con_descend_focused(con));
      tree_render();
  }
  
  /*
   * When the user moves the mouse but does not change the active window
   * (e.g. when having no windows opened but moving mouse on the root screen
   * and crossing virtual screen boundaries), this callback gets called.
   *
   */
  static void handle_motion_notify(xcb_motion_notify_event_t *event) {
      last_timestamp = event->time;
  
      /* Skip events where the pointer was over a child window, we are only
       * interested in events on the root window. */
      if (event->child != XCB_NONE)
          return;
  
      Con *con;
      if ((con = con_by_frame_id(event->event)) == NULL) {
          DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
          check_crossing_screen_boundary(event->root_x, event->root_y);
          return;
      }
  
      if (config.disable_focus_follows_mouse)
          return;
  
      if (con->layout != L_DEFAULT && con->layout != L_SPLITV && con->layout != L_SPLITH)
          return;
  
      /* see over which rect the user is */
      Con *current;
      TAILQ_FOREACH_REVERSE (current, &(con->nodes_head), nodes_head, nodes) {
          if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
              continue;
  
          /* We found the rect, let’s see if this window is focused */
          if (TAILQ_FIRST(&(con->focus_head)) == current)
              return;
  
          con_focus(current);
          x_push_changes(croot);
          return;
      }
  }
  
  /*
   * Called when the keyboard mapping changes (for example by using Xmodmap),
   * we need to update our key bindings then (re-translate symbols).
   *
   */
  static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
      if (event->request != XCB_MAPPING_KEYBOARD &&
          event->request != XCB_MAPPING_MODIFIER)
          return;
  
      DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
      xcb_refresh_keyboard_mapping(keysyms, event);
  
      xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
  
      ungrab_all_keys(conn);
      translate_keysyms();
      grab_all_keys(conn);
  }
  
  /*
   * A new window appeared on the screen (=was mapped), so let’s manage it.
   *
   */
  static void handle_map_request(xcb_map_request_event_t *event) {
      xcb_get_window_attributes_cookie_t cookie;
  
      cookie = xcb_get_window_attributes_unchecked(conn, event->window);
  
      DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
      add_ignore_event(event->sequence, -1);
  
      manage_window(event->window, cookie, false);
  }
  
  /*
   * Configure requests are received when the application wants to resize windows
   * on their own.
   *
   * We generate a synthethic configure notify event to signalize the client its
   * "new" position.
   *
   */
  static void handle_configure_request(xcb_configure_request_event_t *event) {
      Con *con;
  
      DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
           event->window, event->x, event->y, event->width, event->height);
  
      /* For unmanaged windows, we just execute the configure request. As soon as
       * it gets mapped, we will take over anyways. */
      if ((con = con_by_window_id(event->window)) == NULL) {
          DLOG("Configure request for unmanaged window, can do that.\n");
  
          uint32_t mask = 0;
          uint32_t values[7];
          int c = 0;
  #define COPY_MASK_MEMBER(mask_member, event_member) \
      do {                                            \
          if (event->value_mask & mask_member) {      \
              mask |= mask_member;                    \
              values[c++] = event->event_member;      \
          }                                           \
      } while (0)
  
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
          COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
  
          xcb_configure_window(conn, event->window, mask, values);
          xcb_flush(conn);
  
          return;
      }
  
      DLOG("Configure request!\n");
  
      Con *workspace = con_get_workspace(con);
      if (workspace && (strcmp(workspace->name, "__i3_scratch") == 0)) {
          DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
          goto out;
      }
      Con *fullscreen = con_get_fullscreen_covering_ws(workspace);
  
      if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
          /* find the height for the decorations */
          int deco_height = con->deco_rect.height;
          /* we actually need to apply the size/position changes to the *parent*
           * container */
          Rect bsr = con_border_style_rect(con);
          if (con->border_style == BS_NORMAL) {
              bsr.y += deco_height;
              bsr.height -= deco_height;
          }
          Con *floatingcon = con->parent;
          Rect newrect = floatingcon->rect;
  
          if (event->value_mask & XCB_CONFIG_WINDOW_X) {
              newrect.x = event->x + (-1) * bsr.x;
              DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
          }
          if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
              newrect.y = event->y + (-1) * bsr.y;
              DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
          }
          if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
              newrect.width = event->width + (-1) * bsr.width;
              newrect.width += con->border_width * 2;
              DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
                   event->width, newrect.width, con->border_width);
          }
          if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
              newrect.height = event->height + (-1) * bsr.height;
              newrect.height += con->border_width * 2;
              DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
                   event->height, newrect.height, con->border_width);
          }
  
          DLOG("Container is a floating leaf node, will do that.\n");
          floating_reposition(floatingcon, newrect);
          return;
      }
  
      /* Dock windows can be reconfigured in their height and moved to another output. */
      if (con->parent && con->parent->type == CT_DOCKAREA) {
          DLOG("Reconfiguring dock window (con = %p).\n", con);
          if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
              DLOG("Dock client wants to change height to %d, we can do that.\n", event->height);
  
              con->geometry.height = event->height;
              tree_render();
          }
  
          if (event->value_mask & XCB_CONFIG_WINDOW_X || event->value_mask & XCB_CONFIG_WINDOW_Y) {
              int16_t x = event->value_mask & XCB_CONFIG_WINDOW_X ? event->x : (int16_t)con->geometry.x;
              int16_t y = event->value_mask & XCB_CONFIG_WINDOW_Y ? event->y : (int16_t)con->geometry.y;
  
              Con *current_output = con_get_output(con);
              Output *target = get_output_containing(x, y);
              if (target != NULL && current_output != target->con) {
                  DLOG("Dock client is requested to be moved to output %s, moving it there.\n", output_primary_name(target));
                  Match *match;
                  Con *nc = con_for_window(target->con, con->window, &match);
                  DLOG("Dock client will be moved to container %p.\n", nc);
                  con_detach(con);
                  con_attach(con, nc, false);
  
                  tree_render();
              } else {
                  DLOG("Dock client will not be moved, we only support moving it to another output.\n");
              }
          }
          goto out;
      }
  
      if (event->value_mask & XCB_CONFIG_WINDOW_STACK_MODE) {
          DLOG("window 0x%08x wants to be stacked %d\n", event->window, event->stack_mode);
  
          /* Emacs and IntelliJ Idea “request focus” by stacking their window
           * above all others. */
          if (event->stack_mode != XCB_STACK_MODE_ABOVE) {
              DLOG("stack_mode != XCB_STACK_MODE_ABOVE, ignoring ConfigureRequest\n");
              goto out;
          }
  
          if (fullscreen || !con_is_leaf(con)) {
              DLOG("fullscreen or not a leaf, ignoring ConfigureRequest\n");
              goto out;
          }
  
          if (workspace == NULL) {
              DLOG("Window is not being managed, ignoring ConfigureRequest\n");
              goto out;
          }
  
          if (config.focus_on_window_activation == FOWA_FOCUS || (config.focus_on_window_activation == FOWA_SMART && workspace_is_visible(workspace))) {
              DLOG("Focusing con = %p\n", con);
              workspace_show(workspace);
              con_activate_unblock(con);
              tree_render();
          } else if (config.focus_on_window_activation == FOWA_URGENT || (config.focus_on_window_activation == FOWA_SMART && !workspace_is_visible(workspace))) {
              DLOG("Marking con = %p urgent\n", con);
              con_set_urgency(con, true);
              tree_render();
          } else {
              DLOG("Ignoring request for con = %p.\n", con);
          }
      }
  
  out:
      fake_absolute_configure_notify(con);
  }
  
  /*
   * Gets triggered upon a RandR screen change event, that is when the user
   * changes the screen configuration in any way (mode, position, …)
   *
   */
  static void handle_screen_change(xcb_generic_event_t *e) {
      DLOG("RandR screen change\n");
  
      /* The geometry of the root window is used for “fullscreen global” and
       * changes when new outputs are added. */
      xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
      xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
      if (reply == NULL) {
          ELOG("Could not get geometry of the root window, exiting\n");
          exit(EXIT_FAILURE);
      }
      DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
  
      croot->rect.width = reply->width;
      croot->rect.height = reply->height;
  
      randr_query_outputs();
  
      scratchpad_fix_resolution();
  
      ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
  }
  
  /*
   * Our window decorations were unmapped. That means, the window will be killed
   * now, so we better clean up before.
   *
   */
  static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
      DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
      xcb_get_input_focus_cookie_t cookie;
      Con *con = con_by_window_id(event->window);
      if (con == NULL) {
          /* This could also be an UnmapNotify for the frame. We need to
           * decrement the ignore_unmap counter. */
          con = con_by_frame_id(event->window);
          if (con == NULL) {
              LOG("Not a managed window, ignoring UnmapNotify event\n");
              return;
          }
  
          if (con->ignore_unmap > 0)
              con->ignore_unmap--;
          /* See the end of this function. */
          cookie = xcb_get_input_focus(conn);
          DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
          goto ignore_end;
      }
  
      /* See the end of this function. */
      cookie = xcb_get_input_focus(conn);
  
      if (con->ignore_unmap > 0) {
          DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
          con->ignore_unmap--;
          goto ignore_end;
      }
  
      /* Since we close the container, we need to unset _NET_WM_DESKTOP and
       * _NET_WM_STATE according to the spec. */
      xcb_delete_property(conn, event->window, A__NET_WM_DESKTOP);
      xcb_delete_property(conn, event->window, A__NET_WM_STATE);
  
      tree_close_internal(con, DONT_KILL_WINDOW, false);
      tree_render();
  
  ignore_end:
      /* If the client (as opposed to i3) destroyed or unmapped a window, an
       * EnterNotify event will follow (indistinguishable from an EnterNotify
       * event caused by moving your mouse), causing i3 to set focus to whichever
       * window is now visible.
       *
       * In a complex stacked or tabbed layout (take two v-split containers in a
       * tabbed container), when the bottom window in tab2 is closed, the bottom
       * window of tab1 is visible instead. X11 will thus send an EnterNotify
       * event for the bottom window of tab1, while the focus should be set to
       * the remaining window of tab2.
       *
       * Therefore, we ignore all EnterNotify events which have the same sequence
       * as an UnmapNotify event. */
      add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
  
      /* Since we just ignored the sequence of this UnmapNotify, we want to make
       * sure that following events use a different sequence. When putting xterm
       * into fullscreen and moving the pointer to a different window, without
       * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
       * with the same sequence and thus were ignored (see ticket #609). */
      free(xcb_get_input_focus_reply(conn, cookie, NULL));
  }
  
  /*
   * A destroy notify event is sent when the window is not unmapped, but
   * immediately destroyed (for example when starting a window and immediately
   * killing the program which started it).
   *
   * We just pass on the event to the unmap notify handler (by copying the
   * important fields in the event data structure).
   *
   */
  static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
      DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
  
      xcb_unmap_notify_event_t unmap;
      unmap.sequence = event->sequence;
      unmap.event = event->event;
      unmap.window = event->window;
  
      handle_unmap_notify_event(&unmap);
  }
  
  static bool window_name_changed(i3Window *window, char *old_name) {
      if ((old_name == NULL) && (window->name == NULL))
          return false;
  
      /* Either the old or the new one is NULL, but not both. */
      if ((old_name == NULL) ^ (window->name == NULL))
          return true;
  
      return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
  }
  
  /*
   * Called when a window changes its title
   *
   */
  static bool handle_windowname_change(Con *con, xcb_get_property_reply_t *prop) {
      char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
  
      window_update_name(con->window, prop);
  
      con = remanage_window(con);
  
      x_push_changes(croot);
  
      if (window_name_changed(con->window, old_name))
          ipc_send_window_event("title", con);
  
      FREE(old_name);
  
      return true;
  }
  
  /*
   * Handles legacy window name updates (WM_NAME), see also src/window.c,
   * window_update_name_legacy().
   *
   */
  static bool handle_windowname_change_legacy(Con *con, xcb_get_property_reply_t *prop) {
      char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
  
      window_update_name_legacy(con->window, prop);
  
      con = remanage_window(con);
  
      x_push_changes(croot);
  
      if (window_name_changed(con->window, old_name))
          ipc_send_window_event("title", con);
  
      FREE(old_name);
  
      return true;
  }
  
  /*
   * Called when a window changes its WM_WINDOW_ROLE.
   *
   */
  static bool handle_windowrole_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_role(con->window, prop);
  
      con = remanage_window(con);
  
      return true;
  }
  
  /*
   * Expose event means we should redraw our windows (= title bar)
   *
   */
  static void handle_expose_event(xcb_expose_event_t *event) {
      Con *parent;
  
      DLOG("window = %08x\n", event->window);
  
      if ((parent = con_by_frame_id(event->window)) == NULL) {
          LOG("expose event for unknown window, ignoring\n");
          return;
      }
  
      /* Since we render to our surface on every change anyways, expose events
       * only tell us that the X server lost (parts of) the window contents. */
      draw_util_copy_surface(&(parent->frame_buffer), &(parent->frame),
                             0, 0, 0, 0, parent->rect.width, parent->rect.height);
      xcb_flush(conn);
  }
  
  #define _NET_WM_MOVERESIZE_SIZE_TOPLEFT 0
  #define _NET_WM_MOVERESIZE_SIZE_TOP 1
  #define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT 2
  #define _NET_WM_MOVERESIZE_SIZE_RIGHT 3
  #define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT 4
  #define _NET_WM_MOVERESIZE_SIZE_BOTTOM 5
  #define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT 6
  #define _NET_WM_MOVERESIZE_SIZE_LEFT 7
  #define _NET_WM_MOVERESIZE_MOVE 8           /* movement only */
  #define _NET_WM_MOVERESIZE_SIZE_KEYBOARD 9  /* size via keyboard */
  #define _NET_WM_MOVERESIZE_MOVE_KEYBOARD 10 /* move via keyboard */
  #define _NET_WM_MOVERESIZE_CANCEL 11        /* cancel operation */
  
  #define _NET_MOVERESIZE_WINDOW_X (1 << 8)
  #define _NET_MOVERESIZE_WINDOW_Y (1 << 9)
  #define _NET_MOVERESIZE_WINDOW_WIDTH (1 << 10)
  #define _NET_MOVERESIZE_WINDOW_HEIGHT (1 << 11)
  
  /*
   * Handle client messages (EWMH)
   *
   */
  static void handle_client_message(xcb_client_message_event_t *event) {
      /* If this is a startup notification ClientMessage, the library will handle
       * it and call our monitor_event() callback. */
      if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event))
          return;
  
      LOG("ClientMessage for window 0x%08x\n", event->window);
      if (event->type == A__NET_WM_STATE) {
          if (event->format != 32 ||
              (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
               event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION &&
               event->data.data32[1] != A__NET_WM_STATE_STICKY)) {
              DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
              return;
          }
  
          Con *con = con_by_window_id(event->window);
          if (con == NULL) {
              DLOG("Could not get window for client message\n");
              return;
          }
  
          if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
              /* Check if the fullscreen state should be toggled */
              if ((con->fullscreen_mode != CF_NONE &&
                   (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
                    event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
                  (con->fullscreen_mode == CF_NONE &&
                   (event->data.data32[0] == _NET_WM_STATE_ADD ||
                    event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
                  DLOG("toggling fullscreen\n");
                  con_toggle_fullscreen(con, CF_OUTPUT);
              }
          } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
              /* Check if the urgent flag must be set or not */
              if (event->data.data32[0] == _NET_WM_STATE_ADD)
                  con_set_urgency(con, true);
              else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
                  con_set_urgency(con, false);
              else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
                  con_set_urgency(con, !con->urgent);
          } else if (event->data.data32[1] == A__NET_WM_STATE_STICKY) {
              DLOG("Received a client message to modify _NET_WM_STATE_STICKY.\n");
              if (event->data.data32[0] == _NET_WM_STATE_ADD)
                  con->sticky = true;
              else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
                  con->sticky = false;
              else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
                  con->sticky = !con->sticky;
  
              DLOG("New sticky status for con = %p is %i.\n", con, con->sticky);
              ewmh_update_sticky(con->window->id, con->sticky);
              output_push_sticky_windows(focused);
              ewmh_update_wm_desktop();
          }
  
          tree_render();
      } else if (event->type == A__NET_ACTIVE_WINDOW) {
          if (event->format != 32)
              return;
  
          DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
  
          Con *con = con_by_window_id(event->window);
          if (con == NULL) {
              DLOG("Could not get window for client message\n");
              return;
          }
  
          Con *ws = con_get_workspace(con);
          if (ws == NULL) {
              DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
              return;
          }
  
          if (con_is_internal(ws) && ws != workspace_get("__i3_scratch")) {
              DLOG("Workspace is internal but not scratchpad, ignoring _NET_ACTIVE_WINDOW\n");
              return;
          }
  
          /* data32[0] indicates the source of the request (application or pager) */
          if (event->data.data32[0] == 2) {
              /* Always focus the con if it is from a pager, because this is most
               * likely from some user action */
              DLOG("This request came from a pager. Focusing con = %p\n", con);
  
              if (con_is_internal(ws)) {
                  scratchpad_show(con);
              } else {
                  workspace_show(ws);
                  /* Re-set focus, even if unchanged from i3’s perspective. */
                  focused_id = XCB_NONE;
                  con_activate_unblock(con);
              }
          } else {
              /* Request is from an application. */
              if (con_is_internal(ws)) {
                  DLOG("Ignoring request to make con = %p active because it's on an internal workspace.\n", con);
                  return;
              }
  
              if (config.focus_on_window_activation == FOWA_FOCUS || (config.focus_on_window_activation == FOWA_SMART && workspace_is_visible(ws))) {
                  DLOG("Focusing con = %p\n", con);
                  con_activate_unblock(con);
              } else if (config.focus_on_window_activation == FOWA_URGENT || (config.focus_on_window_activation == FOWA_SMART && !workspace_is_visible(ws))) {
                  DLOG("Marking con = %p urgent\n", con);
                  con_set_urgency(con, true);
              } else
                  DLOG("Ignoring request for con = %p.\n", con);
          }
  
          tree_render();
      } else if (event->type == A_I3_SYNC) {
          xcb_window_t window = event->data.data32[0];
          uint32_t rnd = event->data.data32[1];
          sync_respond(window, rnd);
      } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
          /*
           * A client can request an estimate for the frame size which the window
           * manager will put around it before actually mapping its window. Java
           * does this (as of openjdk-7).
           *
           * Note that the calculation below is not entirely accurate — once you
           * set a different border type, it’s off. We _could_ request all the
           * window properties (which have to be set up at this point according
           * to EWMH), but that seems rather elaborate. The standard explicitly
           * says the application must cope with an estimate that is not entirely
           * accurate.
           */
          DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
  
          /* The reply data: approximate frame size */
          Rect r = {
              config.default_border_width, /* left */
              config.default_border_width, /* right */
              render_deco_height(),        /* top */
              config.default_border_width  /* bottom */
          };
          xcb_change_property(
              conn,
              XCB_PROP_MODE_REPLACE,
              event->window,
              A__NET_FRAME_EXTENTS,
              XCB_ATOM_CARDINAL, 32, 4,
              &r);
          xcb_flush(conn);
      } else if (event->type == A_WM_CHANGE_STATE) {
          /* http://tronche.com/gui/x/icccm/sec-4.html#s-4.1.4 */
          if (event->data.data32[0] == XCB_ICCCM_WM_STATE_ICONIC) {
              /* For compatiblity reasons, Wine will request iconic state and cannot ensure that the WM has agreed on it;
               * immediately revert to normal to avoid being stuck in a paused state. */
              DLOG("Client has requested iconic state, rejecting. (window = %d)\n", event->window);
              long data[] = {XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE};
              xcb_change_property(conn, XCB_PROP_MODE_REPLACE, event->window,
                                  A_WM_STATE, A_WM_STATE, 32, 2, data);
          } else {
              DLOG("Not handling WM_CHANGE_STATE request. (window = %d, state = %d)\n", event->window, event->data.data32[0]);
          }
      } else if (event->type == A__NET_CURRENT_DESKTOP) {
          /* This request is used by pagers and bars to change the current
           * desktop likely as a result of some user action. We interpret this as
           * a request to focus the given workspace. See
           * https://standards.freedesktop.org/wm-spec/latest/ar01s03.html#idm140251368135008
           * */
          DLOG("Request to change current desktop to index %d\n", event->data.data32[0]);
          Con *ws = ewmh_get_workspace_by_index(event->data.data32[0]);
          if (ws == NULL) {
              ELOG("Could not determine workspace for this index, ignoring request.\n");
              return;
          }
  
          DLOG("Handling request to focus workspace %s\n", ws->name);
          workspace_show(ws);
          tree_render();
      } else if (event->type == A__NET_WM_DESKTOP) {
          uint32_t index = event->data.data32[0];
          DLOG("Request to move window %d to EWMH desktop index %d\n", event->window, index);
  
          Con *con = con_by_window_id(event->window);
          if (con == NULL) {
              DLOG("Couldn't find con for window %d, ignoring the request.\n", event->window);
              return;
          }
  
          if (index == NET_WM_DESKTOP_ALL) {
              /* The window is requesting to be visible on all workspaces, so
               * let's float it and make it sticky. */
              DLOG("The window was requested to be visible on all workspaces, making it sticky and floating.\n");
  
              if (floating_enable(con, false)) {
                  con->floating = FLOATING_AUTO_ON;
  
                  con->sticky = true;
                  ewmh_update_sticky(con->window->id, true);
                  output_push_sticky_windows(focused);
              }
          } else {
              Con *ws = ewmh_get_workspace_by_index(index);
              if (ws == NULL) {
                  ELOG("Could not determine workspace for this index, ignoring request.\n");
                  return;
              }
  
              con_move_to_workspace(con, ws, true, false, false);
          }
  
          tree_render();
          ewmh_update_wm_desktop();
      } else if (event->type == A__NET_CLOSE_WINDOW) {
          /*
           * Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW
           * client message request to the root window.
           * https://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472668896
           */
          Con *con = con_by_window_id(event->window);
          if (con) {
              DLOG("Handling _NET_CLOSE_WINDOW request (con = %p)\n", con);
  
              if (event->data.data32[0])
                  last_timestamp = event->data.data32[0];
  
              tree_close_internal(con, KILL_WINDOW, false);
              tree_render();
          } else {
              DLOG("Couldn't find con for _NET_CLOSE_WINDOW request. (window = %d)\n", event->window);
          }
      } else if (event->type == A__NET_WM_MOVERESIZE) {
          /*
           * Client-side decorated Gtk3 windows emit this signal when being
           * dragged by their GtkHeaderBar
           */
          Con *con = con_by_window_id(event->window);
          if (!con || !con_is_floating(con)) {
              DLOG("Couldn't find con for _NET_WM_MOVERESIZE request, or con not floating (window = %d)\n", event->window);
              return;
          }
          DLOG("Handling _NET_WM_MOVERESIZE request (con = %p)\n", con);
          uint32_t direction = event->data.data32[2];
          uint32_t x_root = event->data.data32[0];
          uint32_t y_root = event->data.data32[1];
          /* construct fake xcb_button_press_event_t */
          xcb_button_press_event_t fake = {
              .root_x = x_root,
              .root_y = y_root,
              .event_x = x_root - (con->rect.x),
              .event_y = y_root - (con->rect.y)};
          switch (direction) {
              case _NET_WM_MOVERESIZE_MOVE:
                  floating_drag_window(con->parent, &fake, false);
                  break;
              case _NET_WM_MOVERESIZE_SIZE_TOPLEFT ... _NET_WM_MOVERESIZE_SIZE_LEFT:
                  floating_resize_window(con->parent, false, &fake);
                  break;
              default:
                  DLOG("_NET_WM_MOVERESIZE direction %d not implemented\n", direction);
                  break;
          }
      } else if (event->type == A__NET_MOVERESIZE_WINDOW) {
          DLOG("Received _NET_MOVE_RESIZE_WINDOW. Handling by faking a configure request.\n");
  
          void *_generated_event = scalloc(32, 1);
          xcb_configure_request_event_t *generated_event = _generated_event;
  
          generated_event->window = event->window;
          generated_event->response_type = XCB_CONFIGURE_REQUEST;
  
          generated_event->value_mask = 0;
          if (event->data.data32[0] & _NET_MOVERESIZE_WINDOW_X) {
              generated_event->value_mask |= XCB_CONFIG_WINDOW_X;
              generated_event->x = event->data.data32[1];
          }
          if (event->data.data32[0] & _NET_MOVERESIZE_WINDOW_Y) {
              generated_event->value_mask |= XCB_CONFIG_WINDOW_Y;
              generated_event->y = event->data.data32[2];
          }
          if (event->data.data32[0] & _NET_MOVERESIZE_WINDOW_WIDTH) {
              generated_event->value_mask |= XCB_CONFIG_WINDOW_WIDTH;
              generated_event->width = event->data.data32[3];
          }
          if (event->data.data32[0] & _NET_MOVERESIZE_WINDOW_HEIGHT) {
              generated_event->value_mask |= XCB_CONFIG_WINDOW_HEIGHT;
              generated_event->height = event->data.data32[4];
          }
  
          handle_configure_request(generated_event);
          FREE(generated_event);
      } else {
          DLOG("Skipping client message for unhandled type %d\n", event->type);
      }
  }
  
  static bool handle_window_type(Con *con, xcb_get_property_reply_t *reply) {
      window_update_type(con->window, reply);
      return true;
  }
  
  /*
   * Handles the size hints set by a window, but currently only the part necessary for displaying
   * clients proportionally inside their frames (mplayer for example)
   *
   * See ICCCM 4.1.2.3 for more details
   *
   */
  static bool handle_normal_hints(Con *con, xcb_get_property_reply_t *reply) {
      bool changed = window_update_normal_hints(con->window, reply, NULL);
  
      if (changed) {
          Con *floating = con_inside_floating(con);
          if (floating) {
              floating_check_size(con, false);
              tree_render();
          }
      }
  
      FREE(reply);
      return true;
  }
  
  /*
   * Handles the WM_HINTS property for extracting the urgency state of the window.
   *
   */
  static bool handle_hints(Con *con, xcb_get_property_reply_t *reply) {
      bool urgency_hint;
      window_update_hints(con->window, reply, &urgency_hint);
      con_set_urgency(con, urgency_hint);
      tree_render();
      return true;
  }
  
  /*
   * Handles the transient for hints set by a window, signalizing that this window is a popup window
   * for some other window.
   *
   * See ICCCM 4.1.2.6 for more details
   *
   */
  static bool handle_transient_for(Con *con, xcb_get_property_reply_t *prop) {
      window_update_transient_for(con->window, prop);
      return true;
  }
  
  /*
   * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
   * toolwindow (or similar) and to which window it belongs (logical parent).
   *
   */
  static bool handle_clientleader_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_leader(con->window, prop);
      return true;
  }
  
  /*
   * Handles FocusIn events which are generated by clients (i3’s focus changes
   * don’t generate FocusIn events due to a different EventMask) and updates the
   * decorations accordingly.
   *
   */
  static void handle_focus_in(xcb_focus_in_event_t *event) {
      DLOG("focus change in, for window 0x%08x\n", event->event);
  
      if (event->event == root) {
          DLOG("Received focus in for root window, refocusing the focused window.\n");
          con_focus(focused);
          focused_id = XCB_NONE;
          x_push_changes(croot);
      }
  
      Con *con;
      if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
          return;
      DLOG("That is con %p / %s\n", con, con->name);
  
      if (event->mode == XCB_NOTIFY_MODE_GRAB ||
          event->mode == XCB_NOTIFY_MODE_UNGRAB) {
          DLOG("FocusIn event for grab/ungrab, ignoring\n");
          return;
      }
  
      if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
          DLOG("notify detail is pointer, ignoring this event\n");
          return;
      }
  
      /* Floating windows should be refocused to ensure that they are on top of
       * other windows. */
      if (focused_id == event->event && !con_inside_floating(con)) {
          DLOG("focus matches the currently focused window, not doing anything\n");
          return;
      }
  
      /* Skip dock clients, they cannot get the i3 focus. */
      if (con->parent->type == CT_DOCKAREA) {
          DLOG("This is a dock client, not focusing.\n");
          return;
      }
  
      DLOG("focus is different / refocusing floating window: updating decorations\n");
  
      con_activate_unblock(con);
  
      /* We update focused_id because we don’t need to set focus again */
      focused_id = event->event;
      tree_render();
  }
  
  /*
   * Handles ConfigureNotify events for the root window, which are generated when
   * the monitor configuration changed.
   *
   */
  static void handle_configure_notify(xcb_configure_notify_event_t *event) {
      if (event->event != root) {
          DLOG("ConfigureNotify for non-root window 0x%08x, ignoring\n", event->event);
          return;
      }
      DLOG("ConfigureNotify for root window 0x%08x\n", event->event);
  
      if (force_xinerama) {
          return;
      }
      randr_query_outputs();
  }
  
  /*
   * Handles SelectionClear events for the root window, which are generated when
   * we lose ownership of a selection.
   */
  static void handle_selection_clear(xcb_selection_clear_event_t *event) {
      if (event->selection != wm_sn) {
          DLOG("SelectionClear for unknown selection %d, ignoring\n", event->selection);
          return;
      }
      LOG("Lost WM_Sn selection, exiting.\n");
      exit(EXIT_SUCCESS);
  
      /* unreachable */
  }
  
  /*
   * Handles the WM_CLASS property for assignments and criteria selection.
   *
   */
  static bool handle_class_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_class(con->window, prop);
      con = remanage_window(con);
      return true;
  }
  
  /*
   * Handles the WM_CLIENT_MACHINE property for assignments and criteria selection.
   *
   */
  static bool handle_machine_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_machine(con->window, prop);
      con = remanage_window(con);
      return true;
  }
  
  /*
   * Handles the _MOTIF_WM_HINTS property of specifing window deocration settings.
   *
   */
  static bool handle_motif_hints_change(Con *con, xcb_get_property_reply_t *prop) {
      border_style_t motif_border_style;
      window_update_motif_hints(con->window, prop, &motif_border_style);
  
      if (motif_border_style != con->border_style && motif_border_style != BS_NORMAL) {
          DLOG("Update border style of con %p to %d\n", con, motif_border_style);
          con_set_border_style(con, motif_border_style, con->current_border_width);
  
          x_push_changes(croot);
      }
  
      return true;
  }
  
  /*
   * Handles the _NET_WM_STRUT_PARTIAL property for allocating space for dock clients.
   *
   */
  static bool handle_strut_partial_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_strut_partial(con->window, prop);
  
      /* we only handle this change for dock clients */
      if (con->parent == NULL || con->parent->type != CT_DOCKAREA) {
          return true;
      }
  
      Con *search_at = croot;
      Con *output = con_get_output(con);
      if (output != NULL) {
          DLOG("Starting search at output %s\n", output->name);
          search_at = output;
      }
  
      /* find out the desired position of this dock window */
      if (con->window->reserved.top > 0 && con->window->reserved.bottom == 0) {
          DLOG("Top dock client\n");
          con->window->dock = W_DOCK_TOP;
      } else if (con->window->reserved.top == 0 && con->window->reserved.bottom > 0) {
          DLOG("Bottom dock client\n");
          con->window->dock = W_DOCK_BOTTOM;
      } else {
          DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n");
          if (con->geometry.y < (search_at->rect.height / 2)) {
              DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n",
                   con->geometry.y, (search_at->rect.height / 2));
              con->window->dock = W_DOCK_TOP;
          } else {
              DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n",
                   con->geometry.y, (search_at->rect.height / 2));
              con->window->dock = W_DOCK_BOTTOM;
          }
      }
  
      /* find the dockarea */
      Con *dockarea = con_for_window(search_at, con->window, NULL);
      assert(dockarea != NULL);
  
      /* attach the dock to the dock area */
      con_detach(con);
      con_attach(con, dockarea, true);
  
      tree_render();
  
      return true;
  }
  
  /*
   * Handles the _I3_FLOATING_WINDOW property to properly run assignments for
   * floating window changes.
   *
   * This is needed to correctly run the assignments after changes in floating
   * windows which are triggered by user commands (floating enable | disable). In
   * that case, we can't call run_assignments because it will modify the parser
   * state when it needs to parse the user-specified action, breaking the parser
   * state for the original command.
   *
   */
  static bool handle_i3_floating(Con *con, xcb_get_property_reply_t *prop) {
      DLOG("floating change for con %p\n", con);
  
      remanage_window(con);
  
      return true;
  }
  
  static bool handle_windowicon_change(Con *con, xcb_get_property_reply_t *prop) {
      window_update_icon(con->window, prop);
  
      x_push_changes(croot);
  
      return true;
  }
  
  /* Returns false if the event could not be processed (e.g. the window could not
   * be found), true otherwise */
  typedef bool (*cb_property_handler_t)(Con *con, xcb_get_property_reply_t *property);
  
  struct property_handler_t {
      xcb_atom_t atom;
      uint32_t long_len;
      cb_property_handler_t cb;
  };
  
  static struct property_handler_t property_handlers[] = {
      {0, 128, handle_windowname_change},
      {0, UINT_MAX, handle_hints},
      {0, 128, handle_windowname_change_legacy},
      {0, UINT_MAX, handle_normal_hints},
      {0, UINT_MAX, handle_clientleader_change},
      {0, UINT_MAX, handle_transient_for},
      {0, 128, handle_windowrole_change},
      {0, 128, handle_class_change},
      {0, UINT_MAX, handle_strut_partial_change},
      {0, UINT_MAX, handle_window_type},
      {0, UINT_MAX, handle_i3_floating},
      {0, 128, handle_machine_change},
      {0, 5 * sizeof(uint64_t), handle_motif_hints_change},
      {0, UINT_MAX, handle_windowicon_change}};
  #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
  
  /*
   * Sets the appropriate atoms for the property handlers after the atoms were
   * received from X11
   *
   */
  void property_handlers_init(void) {
      sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
  
      property_handlers[0].atom = A__NET_WM_NAME;
      property_handlers[1].atom = XCB_ATOM_WM_HINTS;
      property_handlers[2].atom = XCB_ATOM_WM_NAME;
      property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
      property_handlers[4].atom = A_WM_CLIENT_LEADER;
      property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
      property_handlers[6].atom = A_WM_WINDOW_ROLE;
      property_handlers[7].atom = XCB_ATOM_WM_CLASS;
      property_handlers[8].atom = A__NET_WM_STRUT_PARTIAL;
      property_handlers[9].atom = A__NET_WM_WINDOW_TYPE;
      property_handlers[10].atom = A_I3_FLOATING_WINDOW;
      property_handlers[11].atom = XCB_ATOM_WM_CLIENT_MACHINE;
      property_handlers[12].atom = A__MOTIF_WM_HINTS;
      property_handlers[13].atom = A__NET_WM_ICON;
  }
  
  static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
      struct property_handler_t *handler = NULL;
      xcb_get_property_reply_t *propr = NULL;
      xcb_generic_error_t *err = NULL;
      Con *con;
  
      for (size_t c = 0; c < NUM_HANDLERS; c++) {
          if (property_handlers[c].atom != atom)
              continue;
  
          handler = &property_handlers[c];
          break;
      }
  
      if (handler == NULL) {
          //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
          return;
      }
  
      if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
          DLOG("Received property for atom %d for unknown client\n", atom);
          return;
      }
  
      if (state != XCB_PROPERTY_DELETE) {
          xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
          propr = xcb_get_property_reply(conn, cookie, &err);
          if (err != NULL) {
              DLOG("got error %d when getting property of atom %d\n", err->error_code, atom);
              FREE(err);
              return;
          }
      }
  
      /* the handler will free() the reply unless it returns false */
      if (!handler->cb(con, propr))
          FREE(propr);
  }
  
  /*
   * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
   * event type.
   *
   */
  void handle_event(int type, xcb_generic_event_t *event) {
      if (type != XCB_MOTION_NOTIFY)
          DLOG("event type %d, xkb_base %d\n", type, xkb_base);
  
      if (randr_base > -1 &&
          type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
          handle_screen_change(event);
          return;
      }
  
      if (xkb_base > -1 && type == xkb_base) {
          DLOG("xkb event, need to handle it.\n");
  
          xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
          if (state->xkbType == XCB_XKB_NEW_KEYBOARD_NOTIFY) {
              DLOG("xkb new keyboard notify, sequence %d, time %d\n", state->sequence, state->time);
              xcb_key_symbols_free(keysyms);
              keysyms = xcb_key_symbols_alloc(conn);
              if (((xcb_xkb_new_keyboard_notify_event_t *)event)->changed & XCB_XKB_NKN_DETAIL_KEYCODES)
                  (void)load_keymap();
              ungrab_all_keys(conn);
              translate_keysyms();
              grab_all_keys(conn);
          } else if (state->xkbType == XCB_XKB_MAP_NOTIFY) {
              if (event_is_ignored(event->sequence, type)) {
                  DLOG("Ignoring map notify event for sequence %d.\n", state->sequence);
              } else {
                  DLOG("xkb map notify, sequence %d, time %d\n", state->sequence, state->time);
                  add_ignore_event(event->sequence, type);
                  xcb_key_symbols_free(keysyms);
                  keysyms = xcb_key_symbols_alloc(conn);
                  ungrab_all_keys(conn);
                  translate_keysyms();
                  grab_all_keys(conn);
                  (void)load_keymap();
              }
          } else if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
              DLOG("xkb state group = %d\n", state->group);
              if (xkb_current_group == state->group)
                  return;
              xkb_current_group = state->group;
              ungrab_all_keys(conn);
              grab_all_keys(conn);
          }
  
          return;
      }
  
      if (shape_supported && type == shape_base + XCB_SHAPE_NOTIFY) {
          xcb_shape_notify_event_t *shape = (xcb_shape_notify_event_t *)event;
  
          DLOG("shape_notify_event for window 0x%08x, shape_kind = %d, shaped = %d\n",
               shape->affected_window, shape->shape_kind, shape->shaped);
  
          Con *con = con_by_window_id(shape->affected_window);
          if (con == NULL) {
              LOG("Not a managed window 0x%08x, ignoring shape_notify_event\n",
                  shape->affected_window);
              return;
          }
  
          if (shape->shape_kind == XCB_SHAPE_SK_BOUNDING ||
              shape->shape_kind == XCB_SHAPE_SK_INPUT) {
              x_set_shape(con, shape->shape_kind, shape->shaped);
          }
  
          return;
      }
  
      switch (type) {
          case XCB_KEY_PRESS:
          case XCB_KEY_RELEASE:
              handle_key_press((xcb_key_press_event_t *)event);
              break;
  
          case XCB_BUTTON_PRESS:
          case XCB_BUTTON_RELEASE:
              handle_button_press((xcb_button_press_event_t *)event);
              break;
  
          case XCB_MAP_REQUEST:
              handle_map_request((xcb_map_request_event_t *)event);
              break;
  
          case XCB_UNMAP_NOTIFY:
              handle_unmap_notify_event((xcb_unmap_notify_event_t *)event);
              break;
  
          case XCB_DESTROY_NOTIFY:
              handle_destroy_notify_event((xcb_destroy_notify_event_t *)event);
              break;
  
          case XCB_EXPOSE:
              if (((xcb_expose_event_t *)event)->count == 0) {
                  handle_expose_event((xcb_expose_event_t *)event);
              }
  
              break;
  
          case XCB_MOTION_NOTIFY:
              handle_motion_notify((xcb_motion_notify_event_t *)event);
              break;
  
          /* Enter window = user moved their mouse over the window */
          case XCB_ENTER_NOTIFY:
              handle_enter_notify((xcb_enter_notify_event_t *)event);
              break;
  
          /* Client message are sent to the root window. The only interesting
           * client message for us is _NET_WM_STATE, we honour
           * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
          case XCB_CLIENT_MESSAGE:
              handle_client_message((xcb_client_message_event_t *)event);
              break;
  
          /* Configure request = window tried to change size on its own */
          case XCB_CONFIGURE_REQUEST:
              handle_configure_request((xcb_configure_request_event_t *)event);
              break;
  
          /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
          case XCB_MAPPING_NOTIFY:
              handle_mapping_notify((xcb_mapping_notify_event_t *)event);
              break;
  
          case XCB_FOCUS_IN:
              handle_focus_in((xcb_focus_in_event_t *)event);
              break;
  
          case XCB_PROPERTY_NOTIFY: {
              xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event;
              last_timestamp = e->time;
              property_notify(e->state, e->window, e->atom);
              break;
          }
  
          case XCB_CONFIGURE_NOTIFY:
              handle_configure_notify((xcb_configure_notify_event_t *)event);
              break;
  
          case XCB_SELECTION_CLEAR:
              handle_selection_clear((xcb_selection_clear_event_t *)event);
              break;
  
          default:
              //DLOG("Unhandled event of type %d\n", type);
              break;
      }
  }
  