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<title>[56541] trunk/src/js/_enqueues/admin/common.js: Plugins: Respect `prefers-reduced-motion` on plugin thumbnails.</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/56541">56541</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/56541","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>joedolson</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-09-07 20:35:38 +0000 (Thu, 07 Sep 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'>Plugins: Respect `prefers-reduced-motion` on plugin thumbnails.
Pause animated plugin thumbnails when a user has reduced motion preferences configured in their device or operating system.
Props Travel_girl, audrasjb, bordoni, stevejonesdev, joedolson.
Fixes <a href="https://core.trac.wordpress.org/ticket/55723">#55723</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcjs_enqueuesadmincommonjs">trunk/src/js/_enqueues/admin/common.js</a></li>
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<h3>Diff</h3>
<a id="trunksrcjs_enqueuesadmincommonjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/js/_enqueues/admin/common.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/js/_enqueues/admin/common.js 2023-09-07 17:28:59 UTC (rev 56540)
+++ trunk/src/js/_enqueues/admin/common.js 2023-09-07 20:35:38 UTC (rev 56541)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2104,3 +2104,119 @@
</span><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"> }( jQuery, window ));
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Freeze animated plugin icons when reduced motion is enabled.
+ *
+ * When the user has enabled the 'prefers-reduced-motion' setting, this module
+ * stops animations for all GIFs on the page with the class 'plugin-icon' or
+ * plugin icon images in the update plugins table.
+ *
+ * @since 6.4
+ */
+(function() {
+ // Private variables and methods.
+ var priv = {},
+ pub = {},
+ mediaQuery;
+
+ // Initialize pauseAll to false; it will be set to true if reduced motion is preferred.
+ priv.pauseAll = false;
+ if ( window.matchMedia ) {
+ mediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
+ if ( ! mediaQuery || mediaQuery.matches ) {
+ priv.pauseAll = true;
+ }
+ }
+
+ // Method to replace animated GIFs with a static frame.
+ priv.freezeAnimatedPluginIcons = function( img ) {
+ var coverImage = function() {
+ var width = img.width;
+ var height = img.height;
+ var canvas = document.createElement( 'canvas' );
+
+ // Set canvas dimensions.
+ canvas.width = width;
+ canvas.height = height;
+
+ // Copy classes from the image to the canvas.
+ canvas.className = img.className;
+
+ // Check if the image is inside a specific table.
+ var isInsideUpdateTable = img.closest( '#update-plugins-table' );
+
+ if ( isInsideUpdateTable ) {
+ // Transfer computed styles from image to canvas.
+ var computedStyles = window.getComputedStyle( img ),
+ i, max;
+ for ( i = 0, max = computedStyles.length; i < max; i++ ) {
+ var propName = computedStyles[ i ];
+ var propValue = computedStyles.getPropertyValue( propName );
+ canvas.style[ propName ] = propValue;
+ }
+ }
+
+ // Draw the image onto the canvas.
+ canvas.getContext( '2d' ).drawImage( img, 0, 0, width, height );
+
+ // Set accessibility attributes on canvas.
+ canvas.setAttribute( 'aria-hidden', 'true' );
+ canvas.setAttribute( 'role', 'presentation' );
+
+ // Insert canvas before the image and set the image to be near-invisible.
+ var parent = img.parentNode;
+ parent.insertBefore( canvas, img );
+ img.style.opacity = 0.01;
+ img.style.width = '0px';
+ img.style.height = '0px';
+ };
+
+ // If the image is already loaded, apply the coverImage function.
+ if ( img.complete ) {
+ coverImage();
+ } else {
+ // Otherwise, wait for the image to load.
+ img.addEventListener( 'load', coverImage, true );
+ }
+ };
+
+ // Public method to freeze all relevant GIFs on the page.
+ pub.freezeAll = function() {
+ var images = document.querySelectorAll( '.plugin-icon, #update-plugins-table img' );
+ for ( var x = 0; x < images.length; x++ ) {
+ if ( /\.gif(?:\?|$)/i.test( images[ x ].src ) ) {
+ priv.freezeAnimatedPluginIcons( images[ x ] );
+ }
+ }
+ };
+
+ // Only run the freezeAll method if the user prefers reduced motion.
+ if ( true === priv.pauseAll ) {
+ pub.freezeAll();
+ }
+
+ // Listen for jQuery AJAX events.
+ ( function( $ ) {
+ $( document ).ajaxComplete( function( event, xhr, settings ) {
+ // Check if this is the 'search-install-plugins' request.
+ if ( settings.data && settings.data.includes( 'action=search-install-plugins' ) ) {
+ // Recheck if the user prefers reduced motion.
+ if ( window.matchMedia ) {
+ var mediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
+ if ( mediaQuery.matches ) {
+ pub.freezeAll();
+ }
+ } else {
+ // Fallback for browsers that don't support matchMedia.
+ if ( true === priv.pauseAll ) {
+ pub.freezeAll();
+ }
+ }
+ }
+ } );
+ } )( jQuery );
+
+ // Expose public methods.
+ return pub;
+})();
</ins></span></pre>
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