Date: Tue, 10 Jan 2012 10:36:50 -0500
From: Austin Clements <amdragon@MIT.EDU>
To: David Edmondson <dme@dme.org>
Subject: Re: [PATCH] emacs: Improve `notmuch-hello' display on ttys.
Message-ID: <20120110153650.GM20796@mit.edu>
References: <1326190528-3548-1-git-send-email-dme@dme.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1326190528-3548-1-git-send-email-dme@dme.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: notmuch@notmuchmail.org
Precedence: list

LGTM, though would it be easier to put this in the else clause of the
if after the setq count?

Is it possible for a tag in the last column to be just long enough to
make the line still wrap?  Somehow my current tag set doesn't trigger
this bug, so I can't test this case (and I admit I can't follow
notmuch-hello-insert-tags well enough to reason this out).

Quoth David Edmondson on Jan 10 at 10:15 am:
> Inserting spaces to pad out columns is good, except when the padding
> makes the line wider than the window. This looks particularly bad on a
> tty where there is no fringe.
> 
> Hence, avoid padding the last column on each row.
> ---
> 
> Thanks to j4ni in #notmuch for spotting this.
> 
>  emacs/notmuch-hello.el |   20 +++++++++++---------
>  1 files changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/emacs/notmuch-hello.el b/emacs/notmuch-hello.el
> index 333d4c1..02017ce 100644
> --- a/emacs/notmuch-hello.el
> +++ b/emacs/notmuch-hello.el
> @@ -299,15 +299,17 @@ should be. Returns a cons cell `(tags-per-line width)'."
>  			       :notify #'notmuch-hello-widget-search
>  			       :notmuch-search-terms query
>  			       formatted-name)
> -		;; Insert enough space to consume the rest of the
> -		;; column.  Because the button for the name is `(1+
> -		;; (length name))' long (due to the trailing space) we
> -		;; can just insert `(- widest (length name))' spaces -
> -		;; the column separator is included in the button if
> -		;; `(equal widest (length name)'.
> -		(widget-insert (make-string (max 1
> -						 (- widest (length name)))
> -					    ? ))))
> +		(unless (eq (% count tags-per-line) (1- tags-per-line))
> +		  ;; If this is not the last tag on the line, insert
> +		  ;; enough space to consume the rest of the column.
> +		  ;; Because the button for the name is `(1+ (length
> +		  ;; name))' long (due to the trailing space) we can
> +		  ;; just insert `(- widest (length name))' spaces - the
> +		  ;; column separator is included in the button if
> +		  ;; `(equal widest (length name)'.
> +		  (widget-insert (make-string (max 1
> +						   (- widest (length name)))
> +					      ? )))))
>  	    (setq count (1+ count))
>  	    (if (eq (% count tags-per-line) 0)
>  		(widget-insert "\n")))