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bug#26672: 25.2; Flyspell overlay conflicts with table.el


From: Eli Zaretskii
Subject: bug#26672: 25.2; Flyspell overlay conflicts with table.el
Date: Fri, 28 Apr 2017 12:10:00 +0300

> From: Allen Li <address@hidden>
> Date: Wed, 26 Apr 2017 15:00:05 -0700
> 
> Flyspell's overlay for misspelled words conflicts with table.el
> 
> table.el adds its keymap as a text property to the text in table cells.
> When Flyspell detects a misspelled word, it adds an overlay with a
> keymap binding mouse2 to ‘flyspell-correct-word’.  Apparently, this
> overlay keymap overrides table.el’s ‘keymap’ text property.
> 
> The effect of this is that pressing TAB to move between table cells will
> instead insert a literal tab character if your cursor happens to be on a
> misspelled word.  This is extremely annoying.

Thank you for your report.

Could you please provide a complete recipe for reproducing the
problem, starting with "emacs -Q", and loading all the necessary
packages and visiting files if needed?  I think I know how to fix
this, but I need a clear-cut test case, and I don't use table.el to
easily know how to do that.

Also, is the problem only with TAB, or are there other keys which
conflict with the Flyspell overlay keymap?

> More generally, I’m not sure that an overlay keymap replacing the
> ‘keymap’ text property is desired behavior.  At the very least, there
> should be an escape hatch option on the overlay keymap that defers to
> the ‘keymap’ text property for cases like Flyspell where replacing the
> ‘keymap’ text property is not desired behavior.

I think we do have the necessary infrastructure in Emacs to achieve
the effect you want, it's just a matter of using it.  Whether to use
it in any given case is a decision that should be made on a case by
case basis, since the user and/or application could want one or the
other.





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