Re: [RFC/PATCH] gitweb: link to toggle 'no merges' option

> In views that support --no-merges, introduce a link that toggles the
> option.
> 
> Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
> 
> ---
>  gitweb/gitweb.css  |   11 +++++++++++
>  gitweb/gitweb.perl |   14 ++++++++++++++
>  2 files changed, 25 insertions(+), 0 deletions(-)
> 
> This is something I've been wanting for a while. There are a number of
> things that don't 'click' with this proof of concept, and I'm coming to
> the list to hear the opinion of users and developers on how to improve
> the thing.
> 
> The patch is live at http://git.oblomov.eu/, an example affected page is
> http://git.oblomov.eu/git/shortlog
> 
> Things that are sure to change:
> 
>  * the aesthetics and location of the toggle link (it shows on mousehover
>    in the title). Other options I've considered are:
>     + next to pagination (first | prev | next), either before or after
>       the existing entries
>     + on mouseover for the table section that refers to the (short)log;
>       this would make it possible to put it summary view too, for example
> 
>  * if you toggle merge view when not on the first page, the reference
>    (first) commit in the view is likely to change drastically, which
>    causes confusion. I have not found a satisfactory solution for this,
>    since the obvious way to 'lock' the view (start paginating from the
>    current top commit) prevents prev/next navigation
> 
> diff --git a/gitweb/gitweb.css b/gitweb/gitweb.css
> index 50067f2..0da6ef0 100644
> --- a/gitweb/gitweb.css
> +++ b/gitweb/gitweb.css
> @@ -572,3 +572,14 @@ span.match {
>  div.binary {
>  	font-style: italic;
>  }
> +
> +span.merge_toggle a {
> +	font-size: 66%;
> +	color: white !important;
> +	font-weight: normal;
> +	vertical-align: top;
> +	text-decoration:none;
> +	visibility: hidden;
> +}
> +
> +*:hover > span.merge_toggle a { visibility:visible }
> diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
> index 7e477af..a63f419 100755
> --- a/gitweb/gitweb.perl
> +++ b/gitweb/gitweb.perl
> @@ -3118,11 +3118,15 @@ sub git_header_html {
>  	my $status = shift || "200 OK";
>  	my $expires = shift;
>  
> +	my $can_have_merges = grep(/^$action$/, @{$allowed_options{'--no-merges'}});
> +	my $has_merges = !grep(/^--no-merges$/, @extra_options);
> +
>  	my $title = "$site_name";
>  	if (defined $project) {
>  		$title .= " - " . to_utf8($project);
>  		if (defined $action) {
>  			$title .= "/$action";
> +			$title .= " (no merges)" unless $has_merges;
>  			if (defined $file_name) {
>  				$title .= " - " . esc_path($file_name);
>  				if ($action eq "tree" && $file_name !~ m|/$|) {
> @@ -3235,6 +3239,16 @@ EOF
>  		print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
>  		if (defined $action) {
>  			print " / $action";
> +			if ($can_have_merges) {
> +				print " <span class='merge_toggle'>";
> +				if ($has_merges) {
> +					printf('<a href="%s">hide merges</a>', href(-replay=>1, 'extra_options'=>('--no-merges', @extra_options)));
> +				} else {
> +					my @href_extra = grep(!/^--no-merges$/, @extra_options);
> +					printf('<a href="%s">show merges</a>', href(-replay=>1, 'extra_options'=>@href_extra));
> +				}
> +				print "</span>";
> +			}
>  		}
>  		print "\n";
>  	}