[PATCH] emacs: make `notmuch-show-open-or-close-all' toggle visibility

[Dmitry Kurochkin]

Hi Pieter.

On Wed, 25 Jan 2012 06:25:39 +0100, Pieter Praet <pieter at praet.org> wrote:
> * emacs/notmuch-show.el (notmuch-show-open-or-close-all):
>   Rename to `notmuch-show-toggle-all-messages', and make it toggle
>   visibility of all messages based on the visibility of the current
>   message, instead of setting visibility based on whether or not a
>   prefix arg was supplied.
> 
> Same functionality, less effort (reaching for 'C-u' is a pain)...
> 
> ---
>  emacs/notmuch-show.el |   22 ++++++++++++----------
>  1 files changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
> index e6a5b31..2d17f74 100644
> --- a/emacs/notmuch-show.el
> +++ b/emacs/notmuch-show.el
> @@ -1050,8 +1050,8 @@ thread id.  If a prefix is given, crypto processing is toggled."
>  	(define-key map "p" 'notmuch-show-previous-open-message)
>  	(define-key map (kbd "DEL") 'notmuch-show-rewind)
>  	(define-key map " " 'notmuch-show-advance-and-archive)
> -	(define-key map (kbd "M-RET") 'notmuch-show-open-or-close-all)
>  	(define-key map (kbd "RET") 'notmuch-show-toggle-message)
> +	(define-key map (kbd "M-RET") 'notmuch-show-toggle-all-messages)

Should the function name include "visible" or "visibility" to make it
clear what is toggled?  E.g. `notmuch-show-toggle-visibility-all'.

Also, consider changing "all-messages" to just "all" or "thread".  That
seems to be more consistent with other functions.

>  	(define-key map "#" 'notmuch-show-print-message)
>  	map)
>        "Keymap for \"notmuch show\" buffers.")
> @@ -1502,16 +1502,18 @@ the result."
>       (not (plist-get props :message-visible))))
>    (force-window-update))
>  
> -(defun notmuch-show-open-or-close-all ()
> -  "Set the visibility all of the messages in the current thread.
> -By default make all of the messages visible. With a prefix
> -argument, hide all of the messages."
> +(defun notmuch-show-toggle-all-messages ()
> +  "Toggle the visibility of all messages in the current thread.
> +If the current message is visible, hide all messages -- and vice versa."
>    (interactive)
> -  (save-excursion
> -    (goto-char (point-min))
> -    (loop do (notmuch-show-message-visible (notmuch-show-get-message-properties)
> -					   (not current-prefix-arg))
> -	  until (not (notmuch-show-goto-message-next))))
> +  (let ((toggle (notmuch-show-message-visible-p)))

Please rename "toggle" to "visible-p".  That would make it more clear
what the variable means, and is consistent with
`notmuch-show-message-visible-p'.

> +    (save-excursion
> +      (goto-char (point-min))
> +      (loop do (notmuch-show-message-visible
> +		(notmuch-show-get-message-properties)
> +		(not toggle))
> +	    until (not (notmuch-show-goto-message-next)))))

A new `notmuch-show-mapc' function was introduced in a recent commit.
Please use it here instead of a custom loop.

> +  (recenter-top-bottom 1)

There was no `recenter-top-bottom' call before.  Why is it needed now?
It seems like an independent change and, if it is needed, would be
better as a separate patch.  At the very least, it's worth mentioning in
the preamble and perhaps in a comment.

Regards,
  Dmitry

>    (force-window-update))
>  
>  (defun notmuch-show-next-button ()
> -- 
> 1.7.8.1
> 
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