Re: Adding a tooltip to text that matches a regexp?

[Tassilo Horn]

Tassilo Horn <tsdh@gnu.org> writes:

>>     (set-text-properties  (match-beginning 0) (match-end 0)
>>                           '(help-echo "Tooltip text"
>>                                       font-lock-face 'my-custom-face))
>>
>> Can I do this in `font-lock-add-keywords`?
>
> Yes, you can.
>
>> If so, how?
>
> This adds a "Foo or Bar" tooltip to any occurences of the words foo or
> bar in the current buffer.
>
>   (font-lock-add-keywords nil
>     '(("\\<\\(foo\\|bar\\)\\>" 1 '(face nil help-echo "Foo or Bar"))))

And I think you will want to add help-echo to
`font-lock-extra-managed-props'.

Bye,
Tassilo