patch to outline.el concerning isearch

[John J Foerch <jjfoerch@earthlink.net>]

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Hello,

I want to implement a particular feature in org-mode that depends upon some
functionality being added to outline-mode.  (org-mode is derived from
outline-mode.)  The feature concerns display of ancestor and sibling headings
when an isearch has come to successful completion in a hidden part of the
file.  The function whose job it is to decide what to display when an isearch
has completed is called `outline-isearch-open-invisible'.  Currently, it
simply calls `(show-entry)'.  The following patch changes that function, and
adds a new variable, to allow derived modes or motivated users to implement
alternate behavior.  The default behavior remains the same, but can more
easily be reprogrammed by a derived mode.

Please comment, criticize, or enlighten.  Thank you,

John Foerch


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Index: lisp/outline.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/outline.el,v
retrieving revision 1.24
diff -r1.24 outline.el
745a746,757
> (defvar outline-isearch-open-invisible-fun
>   'outline-isearch-open-invisible-show-entry
>   "Function that will be called when a successful isearch
>   finishes in an invisible overylay.  The overlay will be passed
>   to the function as its sole argument.")
> 
> ;; Default function for outline-isearch-open-invisible-fun.  Makes only the
> ;; single entry containing point visible.
> (defun outline-isearch-open-invisible-show-entry (overlay)
>   ;; We rely on the fact that isearch places point on the matched text.
>   (show-entry))
> 
751c763,764
<   (show-entry))
---
>   (if outline-isearch-open-invisible-fun
>       (funcall outline-isearch-open-invisible-fun overlay)))

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