Reviewed-by: Bernhard Bitsch <bbitsch(a)ipfire.org>
Tested-by: Bernhard Bitsch <bbitsch(a)ipfire.org>

Am 28.09.2021 um 13:09 schrieb Leo-Andres Hofmann:
> This patch adds a little "help" icon to the page header.
> If a manual entry exists for a configuration page, the icon
> appears and offers a quick way to access the wiki.
> Wiki pages can be configured in the "manualpages" file.
> 
> Signed-off-by: Leo-Andres Hofmann <hofmann(a)leo-andres.de>
> ---
>   config/cfgroot/header.pl                      | 20 +++++++++++++++++++
>   config/cfgroot/manualpages                    |  7 +++++++
>   html/html/themes/ipfire/include/css/style.css | 13 ++++++++++++
>   html/html/themes/ipfire/include/functions.pl  | 17 +++++++++++++++-
>   4 files changed, 56 insertions(+), 1 deletion(-)
>   create mode 100644 config/cfgroot/manualpages
> 
> diff --git a/config/cfgroot/header.pl b/config/cfgroot/header.pl
> index 79accbe8a..e97f90d67 100644
> --- a/config/cfgroot/header.pl
> +++ b/config/cfgroot/header.pl
> @@ -91,7 +91,11 @@ if ( -d "/var/ipfire/langs/${language}/" ) {
>       };
>   };
>   
> +### Initialize user manual
> +my %manualpages = ();
> +&General::readhash("${General::swroot}/main/manualpages", \%manualpages);
>   
> +### Load selected language and theme functions
>   require "${swroot}/langs/en.pl";
>   require "${swroot}/langs/${language}.pl";
>   eval `/bin/cat /srv/web/ipfire/html/themes/ipfire/include/functions.pl`;
> @@ -553,3 +557,19 @@ sub colorize {
>   		return $string;
>   	}
>   }
> +
> +# Get user manual URL for the specified configuration page, returns empty if no entry is configured
> +sub get_manualpage_url() {
> +	my ($cgi_page) = @_;
> +
> +	# Ensure base url is configured
> +	return unless($manualpages{'BASE_URL'});
> +
> +	# Return URL
> +	if($cgi_page && defined($manualpages{$cgi_page})) {
> +		return "$manualpages{'BASE_URL'}/$manualpages{$cgi_page}";
> +	}
> +
> +	# No manual page configured, return nothing
> +	return;
> +}
> diff --git a/config/cfgroot/manualpages b/config/cfgroot/manualpages
> new file mode 100644
> index 000000000..e5ab1a13c
> --- /dev/null
> +++ b/config/cfgroot/manualpages
> @@ -0,0 +1,7 @@
> +# User manual base URL (without trailing slash)
> +BASE_URL=https://wiki.ipfire.org
> +
> +# Assign manual page URL path to CGI file ([cgi basename]=[path/to/page])
> +index=configuration/system/startpage
> +pppsetup=configuration/system/dial
> +qos=configuration/services/qos
> diff --git a/html/html/themes/ipfire/include/css/style.css b/html/html/themes/ipfire/include/css/style.css
> index b92f476c4..661773675 100644
> --- a/html/html/themes/ipfire/include/css/style.css
> +++ b/html/html/themes/ipfire/include/css/style.css
> @@ -169,6 +169,19 @@ iframe {
>   	margin-bottom: 1em;
>   }
>   
> +#main_header > * {
> +	display: inline-block;
> +	vertical-align: baseline;
> +}
> +
> +#main_header > span {
> +	margin-left: 0.8em;
> +}
> +
> +#main_header img {
> +	padding: 0;
> +}
> +
>   #footer {
>   	height: 2.5em;
>   	margin-bottom: 1em;
> diff --git a/html/html/themes/ipfire/include/functions.pl b/html/html/themes/ipfire/include/functions.pl
> index 9f12bbe59..18931428e 100644
> --- a/html/html/themes/ipfire/include/functions.pl
> +++ b/html/html/themes/ipfire/include/functions.pl
> @@ -170,7 +170,22 @@ END
>   print <<END
>   	<div class="bigbox fixed">
>   		<div id="main_inner" class="fixed">
> -			<h1>$title</h1>
> +			<div id="main_header">
> +				<h1>$title</h1>
> +END
> +;
> +
> +# Print user manual link
> +my $manual_url = &Header::get_manualpage_url($scriptName);
> +if($manual_url) {
> +	print <<END
> +				<span><a href="$manual_url" title="$Lang::tr{'online help en'}" target="_blank"><img src="/images/help-browser.png" alt="$Lang::tr{'online help en'}"></a></span>
> +END
> +;
> +}
> +
> +print <<END
> +			</div>
>   END
>   ;
>   }
>