Re: How to add prefix before running interactive regexp search(isearch-forward-regexp)?

[Juri Linkov]

> I usually need to search only in the headings of org-mode file, with the
> content of entries excluded.
> For example, searching string of "org-mode", I used to type:
> isearch-forward-regexp: ^\*.*org-mode, times and times again.
>
> As you can see, I type the prefix of "^\*.*" many times, when performing
> interactive regexp search.
> I have checked isearch.el for some while, but I haven't find a clue to
> define prefix before search.
>
> Do you have any suggestions?

(add-hook 'isearch-mode-hook
          (lambda ()
            (if (eq major-mode 'org-mode)
                (set (make-local-variable 'isearch-filter-predicate)
                     (lambda (beg end)
                       (save-excursion
                         (beginning-of-line)
                         (looking-at-p "^\\*"))))))
          nil t)

-- 
Juri Linkov
http://www.jurta.org/emacs/