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<title>[55564] trunk: KSES: Allow `filter` property to accept a URL in `safecss_filter_attr()`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/55564">55564</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/55564","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-03-20 08:23:47 +0000 (Mon, 20 Mar 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>KSES: Allow `filter` property to accept a URL in `safecss_filter_attr()`.
CSS filters can accept `url()` as a reference to an SVG filter element:
{{{
filter: url( file.svg#filter-element-id );
}}}
This commit allows for that syntax to be used in inline CSS.
Original PR from Gutenberg repository:
* [https://github.com/WordPress/gutenberg/pull/48281 <a href="https://core.trac.wordpress.org/ticket/48281">#48281</a> Duotone: Use the style engine to generate CSS for Duotone]
References:
* [https://developer.mozilla.org/en-US/docs/Web/CSS/filter MDN Web Docs: filter()]
* [https://developer.mozilla.org/en-US/docs/Web/CSS/url MDN Web Docs: url()]
Follow-up to <a href="https://core.trac.wordpress.org/changeset/44136">[44136]</a>, <a href="https://core.trac.wordpress.org/changeset/52049">[52049]</a>.
Props scruffian, jeryj, ironprogrammer, azaozz, hellofromTonya, SergeyBiryukov.
Fixes <a href="https://core.trac.wordpress.org/ticket/57780">#57780</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesksesphp">trunk/src/wp-includes/kses.php</a></li>
<li><a href="#trunktestsphpunittestsksesphp">trunk/tests/phpunit/tests/kses.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludesksesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/kses.php 2023-03-19 12:51:14 UTC (rev 55563)
+++ trunk/src/wp-includes/kses.php 2023-03-20 08:23:47 UTC (rev 55564)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2279,6 +2279,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * Extended `margin-*` and `padding-*` support for logical properties.
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 6.2.0 Added support for `aspect-ratio`, `position`, `top`, `right`, `bottom`, `left`,
</span><span class="cx" style="display: block; padding: 0 10px"> * and `z-index` CSS properties.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 6.3.0 Extended support for `filter` to accept a URL.
</ins><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $css A string of CSS rules.
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $deprecated Not used.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2466,6 +2467,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'background-image',
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> 'cursor',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'filter',
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> 'list-style',
</span><span class="cx" style="display: block; padding: 0 10px"> 'list-style-image',
</span></span></pre></div>
<a id="trunktestsphpunittestsksesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/kses.php 2023-03-19 12:51:14 UTC (rev 55563)
+++ trunk/tests/phpunit/tests/kses.php 2023-03-20 08:23:47 UTC (rev 55564)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1316,6 +1316,11 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'css' => 'aspect-ratio: url( https://wordpress.org/wp-content/uploads/aspect-ratio.jpg );',
</span><span class="cx" style="display: block; padding: 0 10px"> 'expected' => '',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // URL support for `filter` introduced in 6.3.
+ array(
+ 'css' => 'filter: url( my-file.svg#svg-blur );',
+ 'expected' => 'filter: url( my-file.svg#svg-blur )',
+ ),
</ins><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre>
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