Isearch halts in commands and macros

Isearch halts in commands and macros

[Aaron S. Hawley]

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Please write in English, because the Emacs maintainers do not have
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In GNU Emacs 21.4.1 (i486-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2005-10-02 on trouble, modified by Debian
configured using `configure '--build=i486-linux-gnu' '--host=i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--with-x=yes' '--with-x-toolkit=athena' 'CFLAGS=-DDEBIAN -g -O2' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu''
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Binding a "word Isearch" with `C-s C-w' to a shorter command, like
`C-.', causes Isearch to halt.  The unfortunate halting is not
existent in GNU Emacs 20.5.1.

To reproduce, evaluate the following key binding:

  (global-set-key [?\C-.] "\C-s\C-w")

Compare running `C-s C-w' with `C-.'.  I enjoy incremental search's
highlighting of all the instances of the completed search in the
buffer.  If I wanted to halt an incremental search in a key binding or macro I'd use `RET'.

  (global-set-key [?\C-.] "\C-s\C-w\C-m")

This behavior exists in the development version of Emacs, also.

Thanks for Emacs,
/a


Recent input:
C-x k C-g C-x C-k C-x e C-n C-n C-k C-c C-c C-a C-f 
C-f C-f C-x C-k C-g C-x C-k b C-h f C-g C-h a b i n 
d <return> C-x o C-s m a c C-a C-s m a c r o C-a C-v 
C-v C-x o C-h a b <backspace> m a c r o <return> C-x 
o C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-p C-p C-x o C-x C-k C-x e b C-_ <down-mouse-1> 
<mouse-1> M-x r e p o <tab> r <tab> <return>

Recent messages:
edit-kbd-macro: Key sequence b is not a keyboard macro
setq: Quit
Loading apropos...done
Loading view...done
Type C-x 1 to remove help window.  C-M-v to scroll the help.
Mark saved where search started [2 times]
Formatting keyboard macro...done
Undo!
Making completion list...
Loading emacsbug...done

Re: Isearch halts in commands and macros

[Richard M. Stallman]

    To reproduce, evaluate the following key binding:

      (global-set-key [?\C-.] "\C-s\C-w")

Don't you mean C-s C-m C-w?

The reason this can't work is that ending the macro
forces exit of the minibuffer that C-s C-m enters.
That is a flaw, but not an easy one to fix.

Re: Isearch halts in commands and macros

[Aaron S. Hawley]

On Sat, 29 Oct 2005, Richard M. Stallman wrote:

>     To reproduce, evaluate the following key binding:
>
>       (global-set-key [?\C-.] "\C-s\C-w")
>
> Don't you mean C-s C-m C-w?

No, I didn't mean "Word Search", the "special case of nonincremental
search".  I'm sorry about the confusion.  I didn't even know "Word Search"
existed until you mentioned it.  What I meant was searching with Isearch
and grabbing the next word in the buffer with C-w.

> The reason this can't work is that ending the macro
> forces exit of the minibuffer that C-s C-m enters.
> That is a flaw, but not an easy one to fix.

I can imagine.

Only after seeing that a macro with Isearch could work as one would expect
in GNU Emacs 20 did I determine that the behavior was a reasonable
expectation to make of Emacs and therefore worthy of sending a bug report.

I actually don't require this key binding for Isearch in my editing, but
came across it in my missionary work for the Church of Emacs.  I was
trying to help a Vi user port a favored Vi-command into their reborn life
with Emacs.

/a

Re: Isearch halts in commands and macros

[Juri Linkov]

> Only after seeing that a macro with Isearch could work as one would expect
> in GNU Emacs 20 did I determine that the behavior was a reasonable
> expectation to make of Emacs and therefore worthy of sending a bug report.

In Emacs 21 macro termination intentionally causes isearch mode to exit.
You can find in isearch.el the following line that does this:

    (add-hook 'kbd-macro-termination-hook 'isearch-done)

There are other places that check if a keyboard macro is executing,
and don't highlight search strings in this case, etc.

So with the current state, you could write an equivalent Lisp code like:

(defun isearch-current-word ()
  (interactive)
  (isearch-forward nil 1)
  (isearch-yank-word))

(global-set-key [?\C-.] 'isearch-current-word)

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