text: #undef I3__FILE__
  #define I3__FILE__ "floating.c"
  /*
   * vim:ts=4:sw=4:expandtab
   *
   * i3 - an improved dynamic tiling window manager
   * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
   *
   * floating.c: Floating windows.
   *
   */
  #include "all.h"
  
  extern xcb_connection_t *conn;
  
  /*
   * Calculates sum of heights and sum of widths of all currently active outputs
   *
   */
  static Rect total_outputs_dimensions(void) {
      Output *output;
      /* Use Rect to encapsulate dimensions, ignoring x/y */
      Rect outputs_dimensions = {0, 0, 0, 0};
      TAILQ_FOREACH(output, &outputs, outputs) {
          outputs_dimensions.height += output->rect.height;
          outputs_dimensions.width += output->rect.width;
      }
      return outputs_dimensions;
  }
  
  /**
   * Called when a floating window is created or resized.
   * This function resizes the window if its size is higher or lower than the
   * configured maximum/minimum size, respectively.
   *
   */
  void floating_check_size(Con *floating_con) {
      /* Define reasonable minimal and maximal sizes for floating windows */
      const int floating_sane_min_height = 50;
      const int floating_sane_min_width = 75;
      Rect floating_sane_max_dimensions;
      Con *focused_con = con_descend_focused(floating_con);
  
      /* obey size increments */
      if (focused_con->height_increment || focused_con->width_increment) {
          Rect border_rect = con_border_style_rect(focused_con);
  
          /* We have to do the opposite calculations that render_con() do
           * to get the exact size we want. */
          border_rect.width = -border_rect.width;
          border_rect.width += 2 * focused_con->border_width;
          border_rect.height = -border_rect.height;
          border_rect.height += 2 * focused_con->border_width;
          if (con_border_style(focused_con) == BS_NORMAL)
              border_rect.height += render_deco_height();
  
          if (focused_con->height_increment &&
              floating_con->rect.height >= focused_con->base_height + border_rect.height) {
              floating_con->rect.height -= focused_con->base_height + border_rect.height;
              floating_con->rect.height -= floating_con->rect.height % focused_con->height_increment;
              floating_con->rect.height += focused_con->base_height + border_rect.height;
          }
  
          if (focused_con->width_increment &&
              floating_con->rect.width >= focused_con->base_width + border_rect.width) {
              floating_con->rect.width -= focused_con->base_width + border_rect.width;
              floating_con->rect.width -= floating_con->rect.width % focused_con->width_increment;
              floating_con->rect.width += focused_con->base_width + border_rect.width;
          }
      }
  
      /* Unless user requests otherwise (-1), ensure width/height do not exceed
       * configured maxima or, if unconfigured, limit to combined width of all
       * outputs */
      if (config.floating_minimum_height != -1) {
          if (config.floating_minimum_height == 0)
              floating_con->rect.height = max(floating_con->rect.height, floating_sane_min_height);
          else
              floating_con->rect.height = max(floating_con->rect.height, config.floating_minimum_height);
      }
      if (config.floating_minimum_width != -1) {
          if (config.floating_minimum_width == 0)
              floating_con->rect.width = max(floating_con->rect.width, floating_sane_min_width);
          else
              floating_con->rect.width = max(floating_con->rect.width, config.floating_minimum_width);
      }
  
      /* Unless user requests otherwise (-1), raise the width/height to
       * reasonable minimum dimensions */
      floating_sane_max_dimensions = total_outputs_dimensions();
      if (config.floating_maximum_height != -1) {
          if (config.floating_maximum_height == 0)
              floating_con->rect.height = min(floating_con->rect.height, floating_sane_max_dimensions.height);
          else
              floating_con->rect.height = min(floating_con->rect.height, config.floating_maximum_height);
      }
      if (config.floating_maximum_width != -1) {
          if (config.floating_maximum_width == 0)
              floating_con->rect.width = min(floating_con->rect.width, floating_sane_max_dimensions.width);
          else
              floating_con->rect.width = min(floating_con->rect.width, config.floating_maximum_width);
      }
  }
  
  void floating_enable(Con *con, bool automatic) {
      bool set_focus = (con == focused);
  
      if (con->parent && con->parent->type == CT_DOCKAREA) {
          LOG("Container is a dock window, not enabling floating mode.\n");
          return;
      }
  
      if (con_is_floating(con)) {
          LOG("Container is already in floating mode, not doing anything.\n");
          return;
      }
  
      /* 1: If the container is a workspace container, we need to create a new
       * split-container with the same layout and make that one floating. We
       * cannot touch the workspace container itself because floating containers
       * are children of the workspace. */
      if (con->type == CT_WORKSPACE) {
          LOG("This is a workspace, creating new container around content\n");
          if (con_num_children(con) == 0) {
              LOG("Workspace is empty, aborting\n");
              return;
          }
          /* TODO: refactor this with src/con.c:con_set_layout */
          Con *new = con_new(NULL, NULL);
          new->parent = con;
          new->layout = con->layout;
  
          /* since the new container will be set into floating mode directly
           * afterwards, we need to copy the workspace rect. */
          memcpy(&(new->rect), &(con->rect), sizeof(Rect));
  
          Con *old_focused = TAILQ_FIRST(&(con->focus_head));
          if (old_focused == TAILQ_END(&(con->focus_head)))
              old_focused = NULL;
  
          /* 4: move the existing cons of this workspace below the new con */
          DLOG("Moving cons\n");
          Con *child;
          while (!TAILQ_EMPTY(&(con->nodes_head))) {
              child = TAILQ_FIRST(&(con->nodes_head));
              con_detach(child);
              con_attach(child, new, true);
          }
  
          /* 4: attach the new split container to the workspace */
          DLOG("Attaching new split to ws\n");
          con_attach(new, con, false);
  
          if (old_focused)
              con_focus(old_focused);
  
          con = new;
          set_focus = false;
      }
  
      /* 1: detach the container from its parent */
      /* TODO: refactor this with tree_close() */
      TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
      TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  
      con_fix_percent(con->parent);
  
      /* 2: create a new container to render the decoration on, add
       * it as a floating window to the workspace */
      Con *nc = con_new(NULL, NULL);
      /* we need to set the parent afterwards instead of passing it as an
       * argument to con_new() because nc would be inserted into the tiling layer
       * otherwise. */
      Con *ws = con_get_workspace(con);
      nc->parent = ws;
      nc->type = CT_FLOATING_CON;
      nc->layout = L_SPLITH;
      /* We insert nc already, even though its rect is not yet calculated. This
       * is necessary because otherwise the workspace might be empty (and get
       * closed in tree_close()) even though it’s not. */
      TAILQ_INSERT_TAIL(&(ws->floating_head), nc, floating_windows);
      TAILQ_INSERT_TAIL(&(ws->focus_head), nc, focused);
  
      /* check if the parent container is empty and close it if so */
      if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) &&
          con_num_children(con->parent) == 0) {
          DLOG("Old container empty after setting this child to floating, closing\n");
          tree_close(con->parent, DONT_KILL_WINDOW, false, false);
      }
  
      char *name;
      sasprintf(&name, "[i3 con] floatingcon around %p", con);
      x_set_name(nc, name);
      free(name);
  
      /* find the height for the decorations */
      int deco_height = render_deco_height();
  
      DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
      DLOG("Geometry = (%d, %d) with %d x %d\n", con->geometry.x, con->geometry.y, con->geometry.width, con->geometry.height);
      Rect zero = {0, 0, 0, 0};
      nc->rect = con->geometry;
      /* If the geometry was not set (split containers), we need to determine a
       * sensible one by combining the geometry of all children */
      if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
          DLOG("Geometry not set, combining children\n");
          Con *child;
          TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
              DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
              nc->rect.width += child->geometry.width;
              nc->rect.height = max(nc->rect.height, child->geometry.height);
          }
      }
  
      floating_check_size(nc);
  
      /* 3: attach the child to the new parent container. We need to do this
       * because con_border_style_rect() needs to access con->parent. */
      con->parent = nc;
      con->percent = 1.0;
      con->floating = FLOATING_USER_ON;
  
      /* 4: set the border style as specified with new_float */
      if (automatic)
          con->border_style = config.default_floating_border;
  
      /* Add pixels for the decoration. */
      Rect border_style_rect = con_border_style_rect(con);
  
      nc->rect.height -= border_style_rect.height;
      nc->rect.width -= border_style_rect.width;
  
      /* Add some more pixels for the title bar */
      if (con_border_style(con) == BS_NORMAL)
          nc->rect.height += deco_height;
  
      /* Honor the X11 border */
      nc->rect.height += con->border_width * 2;
      nc->rect.width += con->border_width * 2;
  
      /* Some clients (like GIMP’s color picker window) get mapped
       * to (0, 0), so we push them to a reasonable position
       * (centered over their leader) */
      if (nc->rect.x == 0 && nc->rect.y == 0) {
          Con *leader;
          if (con->window && con->window->leader != XCB_NONE &&
              (leader = con_by_window_id(con->window->leader)) != NULL) {
              DLOG("Centering above leader\n");
              floating_center(nc, leader->rect);
          } else {
              /* center the window on workspace as fallback */
              floating_center(nc, ws->rect);
          }
      }
  
      /* Sanity check: Are the coordinates on the appropriate output? If not, we
       * need to change them */
      Output *current_output = get_output_containing(nc->rect.x +
                                                         (nc->rect.width / 2),
                                                     nc->rect.y + (nc->rect.height / 2));
  
      Con *correct_output = con_get_output(ws);
      if (!current_output || current_output->con != correct_output) {
          DLOG("This floating window is on the wrong output, fixing coordinates (currently (%d, %d))\n",
               nc->rect.x, nc->rect.y);
  
          /* If moving from one output to another, keep the relative position
           * consistent (e.g. a centered dialog will remain centered). */
          if (current_output)
              floating_fix_coordinates(nc, &current_output->con->rect, &correct_output->rect);
          else {
              nc->rect.x = correct_output->rect.x;
              nc->rect.y = correct_output->rect.y;
          }
      }
  
      DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
  
      /* 5: Subtract the deco_height in order to make the floating window appear
       * at precisely the position it specified in its original geometry (which
       * is what applications might remember). */
      deco_height = (con->border_style == BS_NORMAL ? render_deco_height() : 0);
      nc->rect.y -= deco_height;
  
      DLOG("Corrected y = %d (deco_height = %d)\n", nc->rect.y, deco_height);
  
      TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
      TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
  
      /* render the cons to get initial window_rect correct */
      render_con(nc, false);
      render_con(con, false);
  
      if (set_focus)
          con_focus(con);
  
      /* Check if we need to re-assign it to a different workspace because of its
       * coordinates and exit if that was done successfully. */
      if (floating_maybe_reassign_ws(nc)) {
          ipc_send_window_event("floating", con);
          return;
      }
  
      /* Sanitize coordinates: Check if they are on any output */
      if (get_output_containing(nc->rect.x, nc->rect.y) != NULL) {
          ipc_send_window_event("floating", con);
          return;
      }
  
      ELOG("No output found at destination coordinates, centering floating window on current ws\n");
      floating_center(nc, ws->rect);
  
      ipc_send_window_event("floating", con);
  }
  
  void floating_disable(Con *con, bool automatic) {
      if (!con_is_floating(con)) {
          LOG("Container isn't floating, not doing anything.\n");
          return;
      }
  
      const bool set_focus = (con == focused);
  
      Con *ws = con_get_workspace(con);
  
      /* 1: detach from parent container */
      TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
      TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
  
      /* 2: kill parent container */
      TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
      TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
      tree_close(con->parent, DONT_KILL_WINDOW, true, false);
  
      /* 3: re-attach to the parent of the currently focused con on the workspace
       * this floating con was on */
      Con *focused = con_descend_tiling_focused(ws);
  
      /* if there is no other container on this workspace, focused will be the
       * workspace itself */
      if (focused->type == CT_WORKSPACE)
          con->parent = focused;
      else
          con->parent = focused->parent;
  
      /* con_fix_percent will adjust the percent value */
      con->percent = 0.0;
  
      con->floating = FLOATING_USER_OFF;
  
      con_attach(con, con->parent, false);
  
      con_fix_percent(con->parent);
  
      if (set_focus)
          con_focus(con);
  
      ipc_send_window_event("floating", con);
  }
  
  /*
   * Toggles floating mode for the given container.
   *
   * If the automatic flag is set to true, this was an automatic update by a change of the
   * window class from the application which can be overwritten by the user.
   *
   */
  void toggle_floating_mode(Con *con, bool automatic) {
      /* see if the client is already floating */
      if (con_is_floating(con)) {
          LOG("already floating, re-setting to tiling\n");
  
          floating_disable(con, automatic);
          return;
      }
  
      floating_enable(con, automatic);
  }
  
  /*
   * Raises the given container in the list of floating containers
   *
   */
  void floating_raise_con(Con *con) {
      DLOG("Raising floating con %p / %s\n", con, con->name);
      TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
      TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
  }
  
  /*
   * Checks if con’s coordinates are within its workspace and re-assigns it to
   * the actual workspace if not.
   *
   */
  bool floating_maybe_reassign_ws(Con *con) {
      Output *output = get_output_containing(
          con->rect.x + (con->rect.width / 2),
          con->rect.y + (con->rect.height / 2));
  
      if (!output) {
          ELOG("No output found at destination coordinates?\n");
          return false;
      }
  
      if (con_get_output(con) == output->con) {
          DLOG("still the same ws\n");
          return false;
      }
  
      DLOG("Need to re-assign!\n");
  
      Con *content = output_get_content(output->con);
      Con *ws = TAILQ_FIRST(&(content->focus_head));
      DLOG("Moving con %p / %s to workspace %p / %s\n", con, con->name, ws, ws->name);
      con_move_to_workspace(con, ws, false, true);
      con_focus(con_descend_focused(con));
      return true;
  }
  
  /*
   * Centers a floating con above the specified rect.
   *
   */
  void floating_center(Con *con, Rect rect) {
      con->rect.x = rect.x + (rect.width / 2) - (con->rect.width / 2);
      con->rect.y = rect.y + (rect.height / 2) - (con->rect.height / 2);
  }
  
  /*
   * Moves the given floating con to the current pointer position.
   *
   */
  void floating_move_to_pointer(Con *con) {
      assert(con->type == CT_FLOATING_CON);
  
      xcb_query_pointer_reply_t *reply = xcb_query_pointer_reply(conn, xcb_query_pointer(conn, root), NULL);
      if (reply == NULL) {
          ELOG("could not query pointer position, not moving this container\n");
          return;
      }
  
      Output *output = get_output_containing(reply->root_x, reply->root_y);
      if (output == NULL) {
          ELOG("The pointer is not on any output, cannot move the container here.\n");
          return;
      }
  
      /* Determine where to put the window. */
      int32_t x = reply->root_x - con->rect.width / 2;
      int32_t y = reply->root_y - con->rect.height / 2;
      FREE(reply);
  
      /* Correct target coordinates to be in-bounds. */
      x = MAX(x, (int32_t)output->rect.x);
      y = MAX(y, (int32_t)output->rect.y);
      if (x + con->rect.width > output->rect.x + output->rect.width)
          x = output->rect.x + output->rect.width - con->rect.width;
      if (y + con->rect.height > output->rect.y + output->rect.height)
          y = output->rect.y + output->rect.height - con->rect.height;
  
      /* Update container's coordinates to position it correctly. */
      floating_reposition(con, (Rect){x, y, con->rect.width, con->rect.height});
  }
  
  DRAGGING_CB(drag_window_callback) {
      const struct xcb_button_press_event_t *event = extra;
  
      /* Reposition the client correctly while moving */
      con->rect.x = old_rect->x + (new_x - event->root_x);
      con->rect.y = old_rect->y + (new_y - event->root_y);
  
      render_con(con, false);
      x_push_node(con);
      xcb_flush(conn);
  
      /* Check if we cross workspace boundaries while moving */
      if (!floating_maybe_reassign_ws(con))
          return;
      /* Ensure not to warp the pointer while dragging */
      x_set_warp_to(NULL);
      tree_render();
  }
  
  /*
   * Called when the user clicked on the titlebar of a floating window.
   * Calls the drag_pointer function with the drag_window callback
   *
   */
  void floating_drag_window(Con *con, const xcb_button_press_event_t *event) {
      DLOG("floating_drag_window\n");
  
      /* Push changes before dragging, so that the window gets raised now and not
       * after the user releases the mouse button */
      tree_render();
  
      /* Store the initial rect in case of user revert/cancel */
      Rect initial_rect = con->rect;
  
      /* Drag the window */
      drag_result_t drag_result = drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, XCURSOR_CURSOR_MOVE, drag_window_callback, event);
  
      /* If the user cancelled, undo the changes. */
      if (drag_result == DRAG_REVERT)
          floating_reposition(con, initial_rect);
  
      /* If this is a scratchpad window, don't auto center it from now on. */
      if (con->scratchpad_state == SCRATCHPAD_FRESH)
          con->scratchpad_state = SCRATCHPAD_CHANGED;
  
      tree_render();
  }
  
  /*
   * This is an ugly data structure which we need because there is no standard
   * way of having nested functions (only available as a gcc extension at the
   * moment, clang doesn’t support it) or blocks (only available as a clang
   * extension and only on Mac OS X systems at the moment).
   *
   */
  struct resize_window_callback_params {
      const border_t corner;
      const bool proportional;
      const xcb_button_press_event_t *event;
  };
  
  DRAGGING_CB(resize_window_callback) {
      const struct resize_window_callback_params *params = extra;
      const xcb_button_press_event_t *event = params->event;
      border_t corner = params->corner;
  
      int32_t dest_x = con->rect.x;
      int32_t dest_y = con->rect.y;
      uint32_t dest_width;
      uint32_t dest_height;
  
      double ratio = (double)old_rect->width / old_rect->height;
  
      /* First guess: We resize by exactly the amount the mouse moved,
       * taking into account in which corner the client was grabbed */
      if (corner & BORDER_LEFT)
          dest_width = old_rect->width - (new_x - event->root_x);
      else
          dest_width = old_rect->width + (new_x - event->root_x);
  
      if (corner & BORDER_TOP)
          dest_height = old_rect->height - (new_y - event->root_y);
      else
          dest_height = old_rect->height + (new_y - event->root_y);
  
      /* User wants to keep proportions, so we may have to adjust our values */
      if (params->proportional) {
          dest_width = max(dest_width, (int)(dest_height * ratio));
          dest_height = max(dest_height, (int)(dest_width / ratio));
      }
  
      con->rect = (Rect){dest_x, dest_y, dest_width, dest_height};
  
      /* Obey window size */
      floating_check_size(con);
  
      /* If not the lower right corner is grabbed, we must also reposition
       * the client by exactly the amount we resized it */
      if (corner & BORDER_LEFT)
          dest_x = old_rect->x + (old_rect->width - con->rect.width);
  
      if (corner & BORDER_TOP)
          dest_y = old_rect->y + (old_rect->height - con->rect.height);
  
      con->rect.x = dest_x;
      con->rect.y = dest_y;
  
      /* TODO: don’t re-render the whole tree just because we change
       * coordinates of a floating window */
      tree_render();
      x_push_changes(croot);
  }
  
  /*
   * Called when the user clicked on a floating window while holding the
   * floating_modifier and the right mouse button.
   * Calls the drag_pointer function with the resize_window callback
   *
   */
  void floating_resize_window(Con *con, const bool proportional,
                              const xcb_button_press_event_t *event) {
      DLOG("floating_resize_window\n");
  
      /* corner saves the nearest corner to the original click. It contains
       * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
      border_t corner = 0;
  
      if (event->event_x <= (int16_t)(con->rect.width / 2))
          corner |= BORDER_LEFT;
      else
          corner |= BORDER_RIGHT;
  
      int cursor = 0;
      if (event->event_y <= (int16_t)(con->rect.height / 2)) {
          corner |= BORDER_TOP;
          cursor = (corner & BORDER_LEFT) ? XCURSOR_CURSOR_TOP_LEFT_CORNER : XCURSOR_CURSOR_TOP_RIGHT_CORNER;
      } else {
          corner |= BORDER_BOTTOM;
          cursor = (corner & BORDER_LEFT) ? XCURSOR_CURSOR_BOTTOM_LEFT_CORNER : XCURSOR_CURSOR_BOTTOM_RIGHT_CORNER;
      }
  
      struct resize_window_callback_params params = {corner, proportional, event};
  
      /* get the initial rect in case of revert/cancel */
      Rect initial_rect = con->rect;
  
      drag_result_t drag_result = drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, cursor, resize_window_callback, &params);
  
      /* If the user cancels, undo the resize */
      if (drag_result == DRAG_REVERT)
          floating_reposition(con, initial_rect);
  
      /* If this is a scratchpad window, don't auto center it from now on. */
      if (con->scratchpad_state == SCRATCHPAD_FRESH)
          con->scratchpad_state = SCRATCHPAD_CHANGED;
  }
  
  /* As endorsed by “ASSOCIATING CUSTOM DATA WITH A WATCHER” in ev(3) */
  struct drag_x11_cb {
      ev_check check;
  
      /* Whether this modal event loop should be exited and with which result. */
      drag_result_t result;
  
      /* The container that is being dragged or resized, or NULL if this is a
       * drag of the resize handle. */
      Con *con;
  
      /* The dimensions of con when the loop was started. */
      Rect old_rect;
  
      /* The callback to invoke after every pointer movement. */
      callback_t callback;
  
      /* User data pointer for callback. */
      const void *extra;
  };
  
  static void xcb_drag_check_cb(EV_P_ ev_check *w, int revents) {
      struct drag_x11_cb *dragloop = (struct drag_x11_cb *)w;
      xcb_motion_notify_event_t *last_motion_notify = NULL;
      xcb_generic_event_t *event;
  
      while ((event = xcb_poll_for_event(conn)) != NULL) {
          if (event->response_type == 0) {
              xcb_generic_error_t *error = (xcb_generic_error_t *)event;
              DLOG("X11 Error received (probably harmless)! sequence 0x%x, error_code = %d\n",
                   error->sequence, error->error_code);
              free(event);
              continue;
          }
  
          /* Strip off the highest bit (set if the event is generated) */
          int type = (event->response_type & 0x7F);
  
          switch (type) {
              case XCB_BUTTON_RELEASE:
                  dragloop->result = DRAG_SUCCESS;
                  break;
  
              case XCB_KEY_PRESS:
                  DLOG("A key was pressed during drag, reverting changes.\n");
                  dragloop->result = DRAG_REVERT;
                  handle_event(type, event);
                  break;
  
              case XCB_UNMAP_NOTIFY: {
                  xcb_unmap_notify_event_t *unmap_event = (xcb_unmap_notify_event_t *)event;
                  Con *con = con_by_window_id(unmap_event->window);
  
                  if (con != NULL) {
                      DLOG("UnmapNotify for window 0x%08x (container %p)\n", unmap_event->window, con);
  
                      if (con_get_workspace(con) == con_get_workspace(focused)) {
                          DLOG("UnmapNotify for a managed window on the current workspace, aborting\n");
                          dragloop->result = DRAG_ABORT;
                      }
                  }
  
                  handle_event(type, event);
                  break;
              }
  
              case XCB_MOTION_NOTIFY:
                  /* motion_notify events are saved for later */
                  FREE(last_motion_notify);
                  last_motion_notify = (xcb_motion_notify_event_t *)event;
                  break;
  
              default:
                  DLOG("Passing to original handler\n");
                  handle_event(type, event);
                  break;
          }
  
          if (last_motion_notify != (xcb_motion_notify_event_t *)event)
              free(event);
  
          if (dragloop->result != DRAGGING)
              return;
      }
  
      if (last_motion_notify == NULL)
          return;
  
      dragloop->callback(
          dragloop->con,
          &(dragloop->old_rect),
          last_motion_notify->root_x,
          last_motion_notify->root_y,
          dragloop->extra);
      free(last_motion_notify);
  }
  
  /*
   * This function grabs your pointer and keyboard and lets you drag stuff around
   * (borders). Every time you move your mouse, an XCB_MOTION_NOTIFY event will
   * be received and the given callback will be called with the parameters
   * specified (client, border on which the click originally was), the original
   * rect of the client, the event and the new coordinates (x, y).
   *
   */
  drag_result_t drag_pointer(Con *con, const xcb_button_press_event_t *event, xcb_window_t
                                                                                  confine_to,
                             border_t border, int cursor, callback_t callback, const void *extra) {
      xcb_cursor_t xcursor = (cursor && xcursor_supported) ? xcursor_get_cursor(cursor) : XCB_NONE;
  
      /* Grab the pointer */
      xcb_grab_pointer_cookie_t cookie;
      xcb_grab_pointer_reply_t *reply;
      xcb_generic_error_t *error;
  
      cookie = xcb_grab_pointer(conn,
                                false,                                                         /* get all pointer events specified by the following mask */
                                root,                                                          /* grab the root window */
                                XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
                                XCB_GRAB_MODE_ASYNC,                                           /* pointer events should continue as normal */
                                XCB_GRAB_MODE_ASYNC,                                           /* keyboard mode */
                                confine_to,                                                    /* confine_to = in which window should the cursor stay */
                                xcursor,                                                       /* possibly display a special cursor */
                                XCB_CURRENT_TIME);
  
      if ((reply = xcb_grab_pointer_reply(conn, cookie, &error)) == NULL) {
          ELOG("Could not grab pointer (error_code = %d)\n", error->error_code);
          free(error);
          return DRAG_ABORT;
      }
  
      free(reply);
  
      /* Grab the keyboard */
      xcb_grab_keyboard_cookie_t keyb_cookie;
      xcb_grab_keyboard_reply_t *keyb_reply;
  
      keyb_cookie = xcb_grab_keyboard(conn,
                                      false, /* get all keyboard events */
                                      root,  /* grab the root window */
                                      XCB_CURRENT_TIME,
                                      XCB_GRAB_MODE_ASYNC, /* continue processing pointer events as normal */
                                      XCB_GRAB_MODE_ASYNC  /* keyboard mode */
                                      );
  
      if ((keyb_reply = xcb_grab_keyboard_reply(conn, keyb_cookie, &error)) == NULL) {
          ELOG("Could not grab keyboard (error_code = %d)\n", error->error_code);
          free(error);
          xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
          return DRAG_ABORT;
      }
  
      free(keyb_reply);
  
      /* Go into our own event loop */
      struct drag_x11_cb loop = {
          .result = DRAGGING,
          .con = con,
          .callback = callback,
          .extra = extra,
      };
      if (con)
          loop.old_rect = con->rect;
      ev_check_init(&loop.check, xcb_drag_check_cb);
      main_set_x11_cb(false);
      ev_check_start(main_loop, &loop.check);
  
      while (loop.result == DRAGGING)
          ev_run(main_loop, EVRUN_ONCE);
  
      ev_check_stop(main_loop, &loop.check);
      main_set_x11_cb(true);
  
      xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
      xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
      xcb_flush(conn);
  
      return loop.result;
  }
  
  /*
   * Repositions the CT_FLOATING_CON to have the coordinates specified by
   * newrect, but only if the coordinates are not out-of-bounds. Also reassigns
   * the floating con to a different workspace if this move was across different
   * outputs.
   *
   */
  void floating_reposition(Con *con, Rect newrect) {
      /* Sanity check: Are the new coordinates on any output? If not, we
       * ignore that request. */
      if (!contained_by_output(newrect)) {
          ELOG("No output found at destination coordinates. Not repositioning.\n");
          return;
      }
  
      con->rect = newrect;
  
      floating_maybe_reassign_ws(con);
  
      /* If this is a scratchpad window, don't auto center it from now on. */
      if (con->scratchpad_state == SCRATCHPAD_FRESH)
          con->scratchpad_state = SCRATCHPAD_CHANGED;
  
      tree_render();
  }
  
  /*
   * Fixes the coordinates of the floating window whenever the window gets
   * reassigned to a different output (or when the output’s rect changes).
   *
   */
  void floating_fix_coordinates(Con *con, Rect *old_rect, Rect *new_rect) {
      DLOG("Fixing coordinates of floating window %p (rect (%d, %d), %d x %d)\n",
           con, con->rect.x, con->rect.y, con->rect.width, con->rect.height);
      DLOG("old_rect = (%d, %d), %d x %d\n",
           old_rect->x, old_rect->y, old_rect->width, old_rect->height);
      DLOG("new_rect = (%d, %d), %d x %d\n",
           new_rect->x, new_rect->y, new_rect->width, new_rect->height);
      /* First we get the x/y coordinates relative to the x/y coordinates
       * of the output on which the window is on */
      int32_t rel_x = con->rect.x - old_rect->x + (int32_t)(con->rect.width / 2);
      int32_t rel_y = con->rect.y - old_rect->y + (int32_t)(con->rect.height / 2);
      /* Then we calculate a fraction, for example 0.63 for a window
       * which is at y = 1212 of a 1920 px high output */
      DLOG("rel_x = %d, rel_y = %d, fraction_x = %f, fraction_y = %f, output->w = %d, output->h = %d\n",
           rel_x, rel_y, (double)rel_x / old_rect->width, (double)rel_y / old_rect->height,
           old_rect->width, old_rect->height);
      /* Here we have to multiply at first. Or we will lose precision when not compiled with -msse2 */
      con->rect.x = (int32_t)new_rect->x + (double)(rel_x * (int32_t)new_rect->width) / (int32_t)old_rect->width - (int32_t)(con->rect.width / 2);
      con->rect.y = (int32_t)new_rect->y + (double)(rel_y * (int32_t)new_rect->height) / (int32_t)old_rect->height - (int32_t)(con->rect.height / 2);
      DLOG("Resulting coordinates: x = %d, y = %d\n", con->rect.x, con->rect.y);
  }
  
  #if 0
  /*
   * Moves the client 10px to the specified direction.
   *
   */
  void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
          DLOG("floating move\n");
  
          Rect destination = currently_focused->rect;
          Rect *screen = &(currently_focused->workspace->output->rect);
  
          switch (direction) {
                  case D_LEFT:
                          destination.x -= 10;
                          break;
                  case D_RIGHT:
                          destination.x += 10;
                          break;
                  case D_UP:
                          destination.y -= 10;
                          break;
                  case D_DOWN:
                          destination.y += 10;
                          break;
                  /* to make static analyzers happy */
                  default:
                          break;
          }
  
          /* Prevent windows from vanishing completely */
          if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
              (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
              (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
              (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
                  DLOG("boundary check failed, not moving\n");
                  return;
          }
  
          currently_focused->rect = destination;
          reposition_client(conn, currently_focused);
  
          /* Because reposition_client does not send a faked configure event (only resize does),
           * we need to initiate that on our own */
          fake_absolute_configure_notify(conn, currently_focused);
          /* fake_absolute_configure_notify flushes */
  }
  
  /*
   * Hides all floating clients (or show them if they are currently hidden) on
   * the specified workspace.
   *
   */
  void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
          Client *client;
  
          workspace->floating_hidden = !workspace->floating_hidden;
          DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
          TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
                  if (workspace->floating_hidden)
                          client_unmap(conn, client);
                  else client_map(conn, client);
          }
  
          /* If we just unmapped all floating windows we should ensure that the focus
           * is set correctly, that ist, to the first non-floating client in stack */
          if (workspace->floating_hidden)
                  SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
                          if (client_is_floating(client))
                                  continue;
                          set_focus(conn, client, true);
                          return;
                  }
  
          xcb_flush(conn);
  }
  #endif
  