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<?php
/**
* Sitemaps: WP_Sitemaps_Stylesheet class
*
* This class provides the XSL stylesheets to style all sitemaps.
*
* @package WordPress
* @subpackage Sitemaps
* @since 5.5.0
*/
/**
* Stylesheet provider class.
*
* @since 5.5.0
*/
#[AllowDynamicProperties]
class WP_Sitemaps_Stylesheet {
/**
* Renders the XSL stylesheet depending on whether it's the sitemap index or not.
*
* @param string $type Stylesheet type. Either 'sitemap' or 'index'.
*/
public function render_stylesheet( $type ) {
header( 'Content-Type: application/xml; charset=UTF-8' );
if ( 'sitemap' === $type ) {
// All content is escaped below.
echo $this->get_sitemap_stylesheet();
}
if ( 'index' === $type ) {
// All content is escaped below.
echo $this->get_sitemap_index_stylesheet();
}
exit;
}
/**
* Returns the escaped XSL for all sitemaps, except index.
*
* @since 5.5.0
*/
public function get_sitemap_stylesheet() {
$css = $this->get_stylesheet_css();
$title = esc_xml( __( 'XML Sitemap' ) );
$description = esc_xml( __( 'This XML Sitemap is generated by WordPress to make your content more visible for search engines.' ) );
$learn_more = sprintf(
'<a href="%s">%s</a>',
esc_url( __( 'https://www.sitemaps.org/' ) ),
esc_xml( __( 'Learn more about XML sitemaps.' ) )
);
$text = sprintf(
/* translators: %s: Number of URLs. */
esc_xml( __( 'Number of URLs in this XML Sitemap: %s.' ) ),
'<xsl:value-of select="count( sitemap:urlset/sitemap:url )" />'
);
$lang = get_language_attributes( 'html' );
$url = esc_xml( __( 'URL' ) );
$lastmod = esc_xml( __( 'Last Modified' ) );
$changefreq = esc_xml( __( 'Change Frequency' ) );
$priority = esc_xml( __( 'Priority' ) );
$xsl_content = <<<XSL
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:sitemap="http://www.sitemaps.org/schemas/sitemap/0.9"
exclude-result-prefixes="sitemap"
>
<xsl:output method="html" encoding="UTF-8" indent="yes" />
<!--
Set variables for whether lastmod, changefreq or priority occur for any url in the sitemap.
We do this up front because it can be expensive in a large sitemap.
-->
<xsl:variable name="has-lastmod" select="count( /sitemap:urlset/sitemap:url/sitemap:lastmod )" />
<xsl:variable name="has-changefreq" select="count( /sitemap:urlset/sitemap:url/sitemap:changefreq )" />
<xsl:variable name="has-priority" select="count( /sitemap:urlset/sitemap:url/sitemap:priority )" />
<xsl:template match="/">
<html {$lang}>
<head>
<title>{$title}</title>
<style>
{$css}
</style>
</head>
<body>
<div id="sitemap">
<div id="sitemap__header">
<h1>{$title}</h1>
<p>{$description}</p>
<p>{$learn_more}</p>
</div>
<div id="sitemap__content">
<p class="text">{$text}</p>
<table id="sitemap__table">
<thead>
<tr>
<th class="loc">{$url}</th>
<xsl:if test="\$has-lastmod">
<th class="lastmod">{$lastmod}</th>
</xsl:if>
<xsl:if test="\$has-changefreq">
<th class="changefreq">{$changefreq}</th>
</xsl:if>
<xsl:if test="\$has-priority">
<th class="priority">{$priority}</th>
</xsl:if>
</tr>
</thead>
<tbody>
<xsl:for-each select="sitemap:urlset/sitemap:url">
<tr>
<td class="loc"><a href="{sitemap:loc}"><xsl:value-of select="sitemap:loc" /></a></td>
<xsl:if test="\$has-lastmod">
<td class="lastmod"><xsl:value-of select="sitemap:lastmod" /></td>
</xsl:if>
<xsl:if test="\$has-changefreq">
<td class="changefreq"><xsl:value-of select="sitemap:changefreq" /></td>
</xsl:if>
<xsl:if test="\$has-priority">
<td class="priority"><xsl:value-of select="sitemap:priority" /></td>
</xsl:if>
</tr>
</xsl:for-each>
</tbody>
</table>
</div>
</div>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
XSL;
/**
* Filters the content of the sitemap stylesheet.
*
* @since 5.5.0
*
* @param string $xsl_content Full content for the XML stylesheet.
*/
return apply_filters( 'wp_sitemaps_stylesheet_content', $xsl_content );
}
/**
* Returns the escaped XSL for the index sitemaps.
*
* @since 5.5.0
*/
public function get_sitemap_index_stylesheet() {
$css = $this->get_stylesheet_css();
$title = esc_xml( __( 'XML Sitemap' ) );
$description = esc_xml( __( 'This XML Sitemap is generated by WordPress to make your content more visible for search engines.' ) );
$learn_more = sprintf(
'<a href="%s">%s</a>',
esc_url( __( 'https://www.sitemaps.org/' ) ),
esc_xml( __( 'Learn more about XML sitemaps.' ) )
);
$text = sprintf(
/* translators: %s: Number of URLs. */
esc_xml( __( 'Number of URLs in this XML Sitemap: %s.' ) ),
'<xsl:value-of select="count( sitemap:sitemapindex/sitemap:sitemap )" />'
);
$lang = get_language_attributes( 'html' );
$url = esc_xml( __( 'URL' ) );
$lastmod = esc_xml( __( 'Last Modified' ) );
$xsl_content = <<<XSL
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:sitemap="http://www.sitemaps.org/schemas/sitemap/0.9"
exclude-result-prefixes="sitemap"
>
<xsl:output method="html" encoding="UTF-8" indent="yes" />
<!--
Set variables for whether lastmod occurs for any sitemap in the index.
We do this up front because it can be expensive in a large sitemap.
-->
<xsl:variable name="has-lastmod" select="count( /sitemap:sitemapindex/sitemap:sitemap/sitemap:lastmod )" />
<xsl:template match="/">
<html {$lang}>
<head>
<title>{$title}</title>
<style>
{$css}
</style>
</head>
<body>
<div id="sitemap">
<div id="sitemap__header">
<h1>{$title}</h1>
<p>{$description}</p>
<p>{$learn_more}</p>
</div>
<div id="sitemap__content">
<p class="text">{$text}</p>
<table id="sitemap__table">
<thead>
<tr>
<th class="loc">{$url}</th>
<xsl:if test="\$has-lastmod">
<th class="lastmod">{$lastmod}</th>
</xsl:if>
</tr>
</thead>
<tbody>
<xsl:for-each select="sitemap:sitemapindex/sitemap:sitemap">
<tr>
<td class="loc"><a href="{sitemap:loc}"><xsl:value-of select="sitemap:loc" /></a></td>
<xsl:if test="\$has-lastmod">
<td class="lastmod"><xsl:value-of select="sitemap:lastmod" /></td>
</xsl:if>
</tr>
</xsl:for-each>
</tbody>
</table>
</div>
</div>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
XSL;
/**
* Filters the content of the sitemap index stylesheet.
*
* @since 5.5.0
*
* @param string $xsl_content Full content for the XML stylesheet.
*/
return apply_filters( 'wp_sitemaps_stylesheet_index_content', $xsl_content );
}
/**
* Gets the CSS to be included in sitemap XSL stylesheets.
*
* @since 5.5.0
*
* @return string The CSS.
*/
public function get_stylesheet_css() {
$text_align = is_rtl() ? 'right' : 'left';
$css = <<<EOF
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
color: #444;
}
#sitemap {
max-width: 980px;
margin: 0 auto;
}
#sitemap__table {
width: 100%;
border: solid 1px #ccc;
border-collapse: collapse;
}
#sitemap__table tr td.loc {
/*
* URLs should always be LTR.
* See https://core.trac.wordpress.org/ticket/16834
* and https://core.trac.wordpress.org/ticket/49949
*/
direction: ltr;
}
#sitemap__table tr th {
text-align: {$text_align};
}
#sitemap__table tr td,
#sitemap__table tr th {
padding: 10px;
}
#sitemap__table tr:nth-child(odd) td {
background-color: #eee;
}
a:hover {
text-decoration: none;
}
EOF;
/**
* Filters the CSS only for the sitemap stylesheet.
*
* @since 5.5.0
*
* @param string $css CSS to be applied to default XSL file.
*/
return apply_filters( 'wp_sitemaps_stylesheet_css', $css );
}
}