bug#6227: Color isearch regexp submatches differently

[Lennart Borgman]

On Thu, Jun 10, 2010 at 10:52 PM, Juri Linkov <juri@jurta.org> wrote:
>>> I agree, your approach is probably better. But check for more
>>> submatches. Maybe upto the value of some variable, say
>>> isearch-max-submatch-num.
>>
>> Good idea.
>
> Maybe something like this:

Yes,

> +(defcustom search-highlight-submatches 0

but set I suggest a default of 100. The loop costs essentially nothing
for non-submatches and this is on command level.

> +    (let ((i 0) ov)
> +      (while (<= i search-highlight-submatches)
> +       (when (match-beginning i)
> +         (setq ov (make-overlay (match-beginning i) (match-end i)))
> +         (overlay-put ov 'face (intern-soft (format "isearch-%d" i)))
> +         (overlay-put ov 'priority 1002)
> +         (push ov isearch-submatches-overlays))
> +       (setq i (1+ i))))))