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<title>[59225] trunk/src: Revisions: Improve accessibility of revisions selection.</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/59225">59225</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/59225","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>2024-10-13 20:47:12 +0000 (Sun, 13 Oct 2024)</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'>Revisions: Improve accessibility of revisions selection.

Add `aria-labelledby` and `aria-describedby` attributes to revision slider selection handle. Add keyboard `:focus` state to revision slider  handle. Move 'multiple revision' checkbox before the buttons panel, matching its visual order. Change diff `Title` and `Content` headings from `h3` to `h2` to correct headings hierarchy.

Props joedolson, rishishah, sarahricker, williamalexander, afercia. 
Fixes <a href="https://core.trac.wordpress.org/ticket/52303">#52303</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcjs_enqueueswprevisionsjs">trunk/src/js/_enqueues/wp/revisions.js</a></li>
<li><a href="#trunksrcwpadmincssrevisionscss">trunk/src/wp-admin/css/revisions.css</a></li>
<li><a href="#trunksrcwpadminincludesrevisionphp">trunk/src/wp-admin/includes/revision.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcjs_enqueueswprevisionsjs"></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/wp/revisions.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/js/_enqueues/wp/revisions.js    2024-10-13 19:07:06 UTC (rev 59224)
+++ trunk/src/js/_enqueues/wp/revisions.js      2024-10-13 20:47:12 UTC (rev 59225)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -595,13 +595,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">                initialize: function() {
</span><span class="cx" style="display: block; padding: 0 10px">                        _.bindAll( this, 'setWidth' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Add the button view.
-                       this.views.add( new revisions.view.Buttons({
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Add the checkbox view.
+                       this.views.add( new revisions.view.Checkbox({
</ins><span class="cx" style="display: block; padding: 0 10px">                                 model: this.model
</span><span class="cx" style="display: block; padding: 0 10px">                        }) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Add the checkbox view.
-                       this.views.add( new revisions.view.Checkbox({
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Add the button view.
+                       this.views.add( new revisions.view.Buttons({
</ins><span class="cx" style="display: block; padding: 0 10px">                                 model: this.model
</span><span class="cx" style="display: block; padding: 0 10px">                        }) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -628,6 +628,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                model: tooltip
</span><span class="cx" style="display: block; padding: 0 10px">                        }) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        // Add the visually hidden slider help view.
+                       this.views.add( new revisions.view.SliderHelp() );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         // Add the slider view.
</span><span class="cx" style="display: block; padding: 0 10px">                        this.views.add( new revisions.view.Slider({
</span><span class="cx" style="display: block; padding: 0 10px">                                model: slider
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -804,6 +807,12 @@
</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"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        // The slider visually hidden help view.
+       revisions.view.SliderHelp = wp.Backbone.View.extend({
+               className: 'revisions-slider-hidden-help',
+               template:  wp.template( 'revisions-slider-hidden-help' )
+       });
+   
</ins><span class="cx" style="display: block; padding: 0 10px">         // The tooltip view.
</span><span class="cx" style="display: block; padding: 0 10px">        // Encapsulates the tooltip.
</span><span class="cx" style="display: block; padding: 0 10px">        revisions.view.Tooltip = wp.Backbone.View.extend({
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -957,6 +966,20 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        this.applySliderSettings();
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                accessibilityHelper: function() {
+                       var handles = $( '.ui-slider-handle' );
+                       handles.first().attr( {
+                                       role: 'button',
+                                       'aria-labelledby': 'diff-title-from diff-title-author',
+                                       'aria-describedby': 'revisions-slider-hidden-help',
+                       } );
+                       handles.last().attr( {
+                                       role: 'button',
+                                       'aria-labelledby': 'diff-title-to diff-title-author',
+                                       'aria-describedby': 'revisions-slider-hidden-help',
+                       } );
+               },
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 mouseMove: function( e ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var zoneCount         = this.model.revisions.length - 1,       // One fewer zone than models.
</span><span class="cx" style="display: block; padding: 0 10px">                                sliderFrom        = this.$el.allOffsets()[this.direction], // "From" edge of slider.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -996,9 +1019,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                handles.last()
</span><span class="cx" style="display: block; padding: 0 10px">                                        .toggleClass( 'from-handle', !! isRtl )
</span><span class="cx" style="display: block; padding: 0 10px">                                        .toggleClass( 'to-handle', ! isRtl );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                this.accessibilityHelper();
</ins><span class="cx" style="display: block; padding: 0 10px">                         } else {
</span><span class="cx" style="display: block; padding: 0 10px">                                handles.removeClass('from-handle to-handle');
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                this.accessibilityHelper();
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</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">                start: function( event, ui ) {
</span></span></pre></div>
<a id="trunksrcwpadmincssrevisionscss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/revisions.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/revisions.css      2024-10-13 19:07:06 UTC (rev 59224)
+++ trunk/src/wp-admin/css/revisions.css        2024-10-13 20:47:12 UTC (rev 59225)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -458,8 +458,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        touch-action: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.wp-slider .ui-slider-handle,
-.wp-slider .ui-slider-handle.focus {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.wp-slider .ui-slider-handle {
</ins><span class="cx" style="display: block; padding: 0 10px">         background: #f6f7f7;
</span><span class="cx" style="display: block; padding: 0 10px">        border: 1px solid #c3c4c7;
</span><span class="cx" style="display: block; padding: 0 10px">        box-shadow: 0 1px 0 #c3c4c7;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -479,6 +478,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">        transform: translateY(1px);
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.wp-slider .ui-slider-handle:focus,
+.wp-slider .ui-slider-handle.ui-state-focus {
+       background: #f0f0f1;
+       border-color: #8c8f94;
+       box-shadow: 0 0 0 2px #2271b1;
+       /* Only visible in Windows High Contrast mode */
+       outline: 2px solid transparent;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .wp-slider .ui-slider-handle:before {
</span><span class="cx" style="display: block; padding: 0 10px">        background: none;
</span><span class="cx" style="display: block; padding: 0 10px">        position: absolute;
</span></span></pre></div>
<a id="trunksrcwpadminincludesrevisionphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/revision.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/revision.php  2024-10-13 19:07:06 UTC (rev 59224)
+++ trunk/src/wp-admin/includes/revision.php    2024-10-13 20:47:12 UTC (rev 59225)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -378,6 +378,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                </div>
</span><span class="cx" style="display: block; padding: 0 10px">        </script>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        <script id="tmpl-revisions-slider-hidden-help" type="text/html">
+               <h2 class="screen-reader-text"><?php esc_html_e( 'Select a revision' ); ?></h2>
+               <p id="revisions-slider-hidden-help" hidden><?php esc_html_e( 'Change revision by using the left and arrow keys' ); ?></p>
+       </script>
+
</ins><span class="cx" style="display: block; padding: 0 10px">         <script id="tmpl-revisions-checkbox" type="text/html">
</span><span class="cx" style="display: block; padding: 0 10px">                <div class="revision-toggle-compare-mode">
</span><span class="cx" style="display: block; padding: 0 10px">                        <label>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -397,13 +402,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">                <# if ( ! _.isUndefined( data.attributes ) ) { #>
</span><span class="cx" style="display: block; padding: 0 10px">                        <div class="diff-title">
</span><span class="cx" style="display: block; padding: 0 10px">                                <# if ( 'from' === data.type ) { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <strong><?php _ex( 'From:', 'Followed by post revision info' ); ?></strong>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 <strong id="diff-title-from"><?php _ex( 'From:', 'Followed by post revision info' ); ?></strong>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <# } else if ( 'to' === data.type ) { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <strong><?php _ex( 'To:', 'Followed by post revision info' ); ?></strong>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 <strong id="diff-title-to"><?php _ex( 'To:', 'Followed by post revision info' ); ?></strong>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <# } #>
</span><span class="cx" style="display: block; padding: 0 10px">                                <div class="author-card<# if ( data.attributes.autosave ) { #> autosave<# } #>">
</span><span class="cx" style="display: block; padding: 0 10px">                                        {{{ data.attributes.author.avatar }}}
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <div class="author-info">
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 <div class="author-info" id="diff-title-author">
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <# if ( data.attributes.autosave ) { #>
</span><span class="cx" style="display: block; padding: 0 10px">                                                <span class="byline">
</span><span class="cx" style="display: block; padding: 0 10px">                                                <?php
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -464,7 +469,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                <div class="diff-error"><?php _e( 'Sorry, something went wrong. The requested comparison could not be loaded.' ); ?></div>
</span><span class="cx" style="display: block; padding: 0 10px">                <div class="diff">
</span><span class="cx" style="display: block; padding: 0 10px">                <# _.each( data.fields, function( field ) { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <h3>{{ field.name }}</h3>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <h2>{{ field.name }}</h2>
</ins><span class="cx" style="display: block; padding: 0 10px">                         {{{ field.diff }}}
</span><span class="cx" style="display: block; padding: 0 10px">                <# }); #>
</span><span class="cx" style="display: block; padding: 0 10px">                </div>
</span></span></pre>
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