Re: Emacs 26: Code that fixes mouse-drag-and-drop-region to work across frames

[Robert Weiner]

On Tue, Oct 31, 2017 at 10:04 PM, Tak Kunihiro <address@hidden> wrote:

>  I cannot drag text among frames yet. I think I still miss something.
>  Can you show recipe that starts from emacs -Q?
>
> ​See if adding this fixes it:
>
> (setq mouse-position-function
>                 (lambda (frame-x-dot-y)
>                   "Under macOS, mouse-position and mouse-pixel-position sometimes fail to return the selected-frame (returning the prior frame instead); fix that here."
>                   (if frame-x-dot-y (setcar frame-x-dot-y (selected-frame)))
>                   frame-x-dot-y))

;; https://lists.gnu.org/archive/html/emacs-devel/2017-10/msg00804.html
;; https://lists.gnu.org/archive/html/emacs-devel/2017-10/msg00591.html
;; https://lists.gnu.org/archive/html/emacs-devel/2017-10/msg00588.html

;; GNU Emacs 27.0.50 (build 2, x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 10.9.5 (Build 13F1911))
;;  of 2017-11-01
;; ./Emacs -Q
;; M-x eval-buffer

I start to see yellow preview text by tooltip on destination frame.
However, I cannot drop the text yet.  I still miss something.

​Maybe it would be best if someone fixed the XSETFRAME macro in ​mouse-position so it works properly under the macOS window system so we

could avoid any work arounds on this.  -- Bob

From mouse-position:

    ;;    f = SELECTED_FRAME ();

    ;;    XSETFRAME (lispy_dummy, f);

    ;;  It seems like the XSETFRAME macro is not properly copying the value of f on initial frame selection under the macOS window system.