How to I make the popup window in 'other window'?

[failable]

How to I make the popup window in 'other window' instead of fixing it in one of (left top right bottom)?

[stardiviner]

I want this feature too. like helm's options:

(setq helm-full-frame nil ; use current window as popup. helm popup window position.
      helm-always-two-windows t)

[lionel-]

I'm also looking for something like this.

[stardiviner]

The function we need to modify is this function: popwin:popup-buffer and popwin:create-popup-window.

;;;###autoload
(defun* popwin:popup-buffer (buffer
                             &key
                             (width popwin:popup-window-width)
                             (height popwin:popup-window-height)
                             (position popwin:popup-window-position)
                             noselect
                             dedicated
                             stick
                             tail)
  "Show BUFFER in a popup window and return the popup window. If
NOSELECT is non-nil, the popup window will not be selected. If
STICK is non-nil, the popup window will be stuck. If TAIL is
non-nil, the popup window will show the last contents. Calling
`popwin:popup-buffer' during `popwin:popup-buffer' is allowed. In
that case, the buffer of the popup window will be replaced with
BUFFER."
  (interactive "BPopup buffer:\n")
  (setq buffer (get-buffer buffer))
  (popwin:push-context)
  (run-hooks 'popwin:before-popup-hook)
  (multiple-value-bind (context context-stack)
      (popwin:find-context-for-buffer buffer :valid-only t)
    (if context
        (progn
          (popwin:use-context context)
          (setq popwin:context-stack context-stack))
      (let ((win-outline (car (popwin:window-config-tree))))
        (destructuring-bind (master-win popup-win win-map)
            (let ((size (if (popwin:position-horizontal-p position) width height))
                  (adjust popwin:adjust-other-windows))
              (popwin:create-popup-window size position adjust))
          (setq popwin:popup-window popup-win
                popwin:master-window master-win
                popwin:window-outline win-outline
                popwin:window-map win-map
                popwin:window-config nil
                popwin:selected-window (selected-window)))
        (popwin:update-window-reference 'popwin:context-stack :recursive t)
        (popwin:start-close-popup-window-timer))
      (with-selected-window popwin:popup-window
        (popwin:switch-to-buffer buffer)
        (when tail
          (set-window-point popwin:popup-window (point-max))
          (recenter -2)))
      (setq popwin:popup-buffer buffer
            popwin:popup-last-config (list buffer
                                           :width width :height height :position position
                                           :noselect noselect :dedicated dedicated
                                           :stick stick :tail tail)
            popwin:popup-window-dedicated-p dedicated
            popwin:popup-window-stuck-p stick)))
  (if noselect
      (setq popwin:focus-window popwin:selected-window)
    (setq popwin:focus-window popwin:popup-window)
    (select-window popwin:popup-window))
  (run-hooks 'popwin:after-popup-hook)
  popwin:popup-window)

(defun* popwin:create-popup-window (&optional (size 15) (position 'bottom) (adjust t))
  "Create a popup window with SIZE on the frame.  If SIZE
is integer, the size of the popup window will be SIZE. If SIZE is
float, the size of popup window will be a multiplier of SIZE and
frame-size. can be an integer and a float. If ADJUST is t, all of
windows will be adjusted to fit the frame. POSITION must be one
of (left top right bottom). The return value is a pair of a
master window and the popup window. To close the popup window
properly, get `current-window-configuration' before calling this
function, and call `set-window-configuration' with the
window-configuration."
  (let* ((root (car (popwin:window-config-tree)))
         (root-win (popwin:last-selected-window))
         (hfactor 1)
         (vfactor 1))
    (popwin:save-selected-window
     (delete-other-windows root-win))
    (let ((root-width (window-width root-win))
          (root-height (window-height root-win)))
      (when adjust
        (if (floatp size)
            (if (popwin:position-horizontal-p position)
                (setq hfactor (- 1.0 size)
                      size (round (* root-width size)))
              (setq vfactor (- 1.0 size)
                    size (round (* root-height size))))
          (if (popwin:position-horizontal-p position)
              (setq hfactor (/ (float (- root-width size)) root-width))
            (setq vfactor (/ (float (- root-height size)) root-height)))))
      (destructuring-bind (master-win popup-win)
          (popwin:create-popup-window-1 root-win size position)
        ;; Mark popup-win being a popup window.
        (with-selected-window popup-win
          (popwin:switch-to-buffer (popwin:dummy-buffer) t))
        (let ((win-map (popwin:replicate-window-config master-win root hfactor vfactor)))
          (list master-win popup-win win-map))))))