eldoc-frame/README.org

#+TITLE: ElDoc box
This package displays ElDoc documentations in a childframe.

#+CAPTION: Using with eglot in python-mode
[[./screenshot.png]]

* Install
Get the file, add to load path, and
#+BEGIN_SRC emacs-lisp
(require 'eldoc-box)
#+END_SRC
* Usage
** Function
- =eldoc-box-hover-mode= :: Show documentation upon hover. Note that you need to enable ElDoc mode for this to work.
- =eldoc-box-hover-at-point-mode= :: This minor mode shows doc at point. Don't try to enable both minor mode: you can only enable one in the same time.
** Face
-  =eldoc-box-border= :: Adjust =:background= of this face for border color.
- =eldoc-box-body= :: Adjust =:background= of  this face for background color of childframe.
** Variable
- =eldoc-box-max-pixel-width= & =eldoc-box-max-pixel-height= :: Set them according to the screen resolution of your machine.
- =eldoc-box-only-multi-line= :: Set this to non-nil and eldoc-box only display multi-line message in childframe. One line messages are left in minibuffer.
- =eldoc-box-cleanup-interval= :: After this amount of seconds will eldoc-box attempt to cleanup the childframe. E.g. if it is set to 1, the childframe is cleared 1 second after you moved the point to somewhere else (that doesn't have a doc to show). This doesn't apply to =eldoc-box-hover-at-point-mode=, in that mode the childframe is cleared as soon as point moves.
** Use with eglot
As of writing this README, eglot doesn't have a public mode hook, use this hook:
#+BEGIN_SRC emacs-lisp
(add-hook 'eglot--managed-mode-hook #'eldoc-box-hover-mode t)
#+END_SRC
** Help at point hack
If all you need is a "help at point" popup to be used with eglot, here is my hack:
#+BEGIN_SRC emacs-lisp
(defun moon-help-at-point ()
  (interactive)
  (when eglot--managed-mode
    (require 'eldoc-box)
    (let ((eldoc-box-position-function #'eldoc-box--default-at-point-position-function))
      (eldoc-box--display
       (eglot--dbind ((Hover) contents range)
           (jsonrpc-request (eglot--current-server-or-lose) :textDocument/hover
                            (eglot--TextDocumentPositionParams))
         (when (seq-empty-p contents) (eglot--error "No hover info here"))
         (eglot--hover-info contents range))))
    (add-hook 'pre-command-hook #'eldoc-box-quit-frame t t)))
#+END_SRC