Re: xterm-mouse-mode gives incorrect posn-object-x-y with display space

[Stefan Monnier <monnier@iro.umontreal.ca>]

Hi JD,

Could you re-send this via `M-x report-emacs-bug`.


        Stefan


JD Smith [2022-11-24 12:22:44] wrote:

> The mouse-down events delivered by xterm-mouse-mode do not appear to handle clicks on entities with specified space display widths correctly.  Try this in a graphical window, and again in the terminal, with xterm-mouse-mode enabled:
>
> (defun my/report-mouse (ev)
>   (interactive "e")
>   (let* ((posn (event-start ev))
> 	 (rel (posn-object-x-y posn)))
>     (message "Got Relative Position %S" rel)))
>
> (insert "\n\n  ----  "
>         (propertize " "
>                     'extend nil
>                     'display '(space :width (48))
>                     'keymap '(keymap (down-mouse-1 . my/report-mouse))
>                     'font-lock-face 'underline)
>         "  ----  ")
>
> Mouse 1 click positions relative to the extended-width space (underlined for visibility) are reported correctly in graphical emacs, in screen pixel units.  With xterm-mouse-mode, however, relative positions are always reported as (0 . 0) for me, no matter where you click.  Is something wrong with my assumption that posn-object-x-y should work similarly in graphical as well as terminal emacs with xterm-mouse-mode (modulo the larger “pixel” size)?