bug#6227: Color isearch regexp submatches differently

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> I don't see why not.  It's just a more detailed visualisation.
>
> But with slightly different colors.  How do we know long-time users of
> Isearch will understand what they mean, unless they deliberately turn
> on this option?

When they're typing "foo\(bar\)" in regexp isearch and see the different
colours, I think they'll catch on pretty quickly.

>> > Comment #2: This seems to effectively disable the feature on displays
>> > that have fewer than 88 colors.  Is that intentional?  If so, why
>> > doesn't the documentation say so?
>> 
>> I'm guessing it's just cargo-culting off of the isearch face:
>> 
>> (defface isearch
>>   '((((class color) (min-colors 88) (background light))
>
> I don't understand: the 'isearch' face has definitions for all kinds
> of displays, even for monochrome ones:
>
>   (defface isearch
>     '((((class color) (min-colors 88) (background light))
>        ;; The background must not be too dark, for that means
>        ;; the character is hard to see when the cursor is there.
>        (:background "magenta3" :foreground "lightskyblue1"))

I meant that these deffaces aren't complete -- they look like examples,
and the examples are taken from the isearch face.

There should be more of them, and they should be complete, and they
should have better names (isearch-group-1 etc perhaps).

-- 
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