GNU bug report logs - #29150
26.0.90; Input decoding is sometimes skipped in TTY (xterm-mouse-mode)

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From: Alex <agrambot <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Olaf Rogalsky <olaf.rogalsky <at> t-online.de>, 29150 <at> debbugs.gnu.org, Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Subject: bug#29150: Fwd: 26.0.90; Input decoding is sometimes skipped in TTY (xterm-mouse-mode)
Date: Sun, 12 Nov 2017 02:25:22 -0600

[Message part 1 (text/plain, inline)]

Eli Zaretskii <eliz <at> gnu.org> writes:

> Thanks, I installed that patch on the release branch.

Should it use `read-key' instead? See:
https://lists.gnu.org/archive/html/emacs-devel/2017-11/msg00245.html

Perhaps the patch should be replaced on the master branch with one that
uses `read-key' in all cases?

> Should we close this bug now, or is there anything else to do with it?

The first issue is fixed, but not the second (`mouse-drag-secondary'
uses `read-event'). Here's a diff for the second:

[secondary.diff (text/x-diff, inline)]

diff --git a/lisp/mouse.el b/lisp/mouse.el
index 5eeee1ec52..c165e1b0d2 100644
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -1740,7 +1740,7 @@ mouse-drag-secondary
       (let (event end end-point)
 	(track-mouse
 	  (while (progn
-		   (setq event (read-event))
+		   (setq event (read-key))
 		   (or (mouse-movement-p event)
 		       (memq (car-safe event) '(switch-frame select-window))))
 

[Message part 3 (text/plain, inline)]

Stefan, the above is what I meant by "is using `read-key' inside of
`track-mouse' an acceptable stopgap solution?".

> Btw, it seems like "C-h k" is not really working for complex mouse
> clicks even without xterm-mouse-mode.  For example, try this:
>
>   C-h k C-mouse-3
>
> This pops up a menu; select any item from that menu.  The expected
> result is to get the description of the menu item you selected, but
> instead you get the prompt for "following key, mouse click, or menu
> item" anew.

This worked fine in Emacs 25.2, FWIW.

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