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<title>[45798] trunk: Widgets: Allow for short-circuiting widget output in `the_widget()` using the `widget_display_callback` filter, for consistency with output via a registered sidebar.</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/45798">45798</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/45798","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>2019-08-14 23:02:25 +0000 (Wed, 14 Aug 2019)</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'>Widgets: Allow for short-circuiting widget output in `the_widget()` using the `widget_display_callback` filter, for consistency with output via a registered sidebar.
Props MarcGuay, donmhico.
Fixes <a href="https://core.trac.wordpress.org/ticket/34226">#34226</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludeswidgetsphp">trunk/src/wp-includes/widgets.php</a></li>
<li><a href="#trunktestsphpunittestswidgetsphp">trunk/tests/phpunit/tests/widgets.php</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludeswidgetsphp"></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/widgets.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/widgets.php 2019-08-14 17:46:20 UTC (rev 45797)
+++ trunk/src/wp-includes/widgets.php 2019-08-14 23:02:25 UTC (rev 45798)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1125,6 +1125,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $instance = wp_parse_args( $instance );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /** This filter is documented in wp-includes/class-wp-widget.php */
+ $instance = apply_filters( 'widget_display_callback', $instance, $widget_obj, $args );
+
+ if ( false === $instance ) {
+ return;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Fires before rendering the requested widget.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunktestsphpunittestswidgetsphp"></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/widgets.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/widgets.php 2019-08-14 17:46:20 UTC (rev 45797)
+++ trunk/tests/phpunit/tests/widgets.php 2019-08-14 23:02:25 UTC (rev 45798)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -713,6 +713,22 @@
</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">+ * @ticket 34226
+ */
+ public function test_the_widget_should_short_circuit_with_widget_display_callback() {
+ add_filter( 'widget_display_callback', '__return_false' );
+
+ register_widget( 'WP_Widget_Text' );
+
+ ob_start();
+ the_widget( 'WP_Widget_Text' );
+ $widget_content = ob_get_clean();
+ unregister_widget( 'WP_Widget_Text' );
+
+ $this->assertEmpty( $widget_content );
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Register nav menu sidebars.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param array $sidebars Sidebar slugs.
</span></span></pre>
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