Re: placing cursor at *start* of match in incremental search

[Greg Hill]

At 10:22 AM -0700 1/22/03, Kevin Rodgers wrote:
<snip>
> Use the source:


Good "advice" :) for those of us who can make heads or tails of it. 
But it's probably a bit much to ask of someone like Maciej who isn't 
really a lisp programmer.


> `C-g' is bound in isearch-mode-map to isearch-abort, which sets
> isearch-success to nil before calling isearch-done, which is what runs
> isearch-mode-end-hook.  So you could check isearch-success before
> calling goto-char in the hook function.

i.e., for someone who isn't a lisp programmer:

   (add-hook 'isearch-mode-end-hook
         (function (lambda ()
              (if isearch-success (goto-char (match-beginning 0))))))

Seems to work.  Thanks, Kevin.

Incidentally, Maciej, when you are experimenting with different 
versions of anonymous (lambda) functions as hooks in the same Emacs 
session, don't forget to explicitly remove any old versions of the 
function from the hook variable, or you will end up executing more 
that one version and wondering why the new one you just added doesn't 
seem to work the way it should.

For example, after

   (add-hook 'isearch-mode-end-hook
         (function (lambda ()
              (goto-char (match-beginning 0)))))

you should either

   (setq isearch-mode-end-hook nil)

which will remove ALL functions from that hook, or

   (remove-hook 'isearch-mode-end-hook
         (function (lambda ()
              (goto-char (match-beginning 0)))))

which will specifically remove just that one function, before you

   (add-hook 'isearch-mode-end-hook
         (function (lambda ()
              (if isearch-success (goto-char (match-beginning 0))))))

In case you didn't know, the *scratch* buffer, which uses 
lisp-interaction-mode, is the right place to do stuff like that.  I 
don't remember what source I used to learn about how to use 
lisp-interaction mode.  The versions I have of the GNU Emacs Manual 
and the GNU Emacs Lisp Reference Manual don't seem to be much help; 
but there really isn't much to it.  Perhaps someone else can point 
you to a geed tutorial.

--Greg