Re: An isearch command that wraps?

[Lloyd Zusman <ljz@xxxxxxxxxx>]

At Sun, 14 Nov 2004 12:34:06 +0100,
Paul Boekholt wrote:
> 
> On Sat, Nov 13, 2004 at 09:49:44PM -0500, Lloyd Zusman wrote:
> > Has anyone written an isearch command that wraps, sort of like the
> > isearch does in Gnu Emacs?
> Mine does not (Emacs 21.2).

??? I've been using Gnu Emacs since the late 1980's -- since version
17.x or 18.x -- and in all versions since then, including 21.2, isearch
has worked in the way that I described in my original message.  I have
no elisp code that modifies the standard isearch behavior.

And don't just take my word for it; note this text from the Gnu Emacs
"info" page on incremental searching:

     If a search is failing and you ask to repeat it by typing another
  `C-s', it starts again from the beginning of the buffer.  Repeating a
  failing reverse search with `C-r' starts again from the end.  This is
  called "wrapping around", and `Wrapped' appears in the search prompt
  once this has happened.  If you keep on going past the original
  starting point of the search, it changes to `Overwrapped', which means
  that you are revisiting matches that you have already seen.

In my original message, the outline I posted for what I'd like jed's
isearch to do is exactly this.

If you go into Gnu Emacs and try the precise scenario that I outlined in
my original message, you will see that Gnu Emacs' isearch indeed
functions in this manner.


> What Emacs does do that JED does not, is set a mark at the start of the
> search and show a message "mark saved where search started".  So I can
> search forward with C-s, go back to the starting point with C-x C-x and
> then search backward with C-r.

As described above, Gnu Emacs (XEmacs, also, by the way) does more than
this.


> You can do that in JED:
> --- isearch.sl	Mon Jun 14 16:14:09 2004
> +++ isearch.sl	Sun Nov 14 12:23:28 2004
> @@ -96,7 +96,7 @@
>    % and zeros on the stack should match the value of m.
>    % These 0s and 1s are used when unwinding the search stack
>    % Since a mark was pushed and not attached to a character, push 0
> -  
> +   push_mark ();
>     push_mark ();
>     0;
>     m = 1;
>
> The drawback is that the marks are never popped - JED's marks are pushed
> on a stack, Emacs has a mark stack too but doesn't keep reminding you
> there is a mark with an "m" in the modeline.  See also message
> <200410110520.i9B5Ktit018662@xxxxxxxxxxxxxx>

Thanks for this.  However, doing C-x C-x after a failed isearch isn't
the feature that I'm looking for.

As for looking up that previous message: the list archives seem to be
inaccessible, and therefore, I cannot search for that reference.  I
mentioned in a follow-up to my original message that the
www.ruptured-duck.com host (where the jed-users archive lives, according
to the jed documentation on jedsoft) is not responding to http queries.

Can you or someone point me to another source for the
<200410110520.i9B5Ktit018662@xxxxxxxxxxxxxx> message, or perhaps another
location for the list archives besides "ruptured-duck"?

Thanks.

-- 
 Lloyd Zusman
 ljz@xxxxxxxxxx
 God bless you.

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