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<title>[28824] trunk: Ensure that a `has_children` parameter is given to `Walker::start_el()`.</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/28824">28824</a></dd>
<dt>Author</dt> <dd>wonderboymusic</dd>
<dt>Date</dt> <dd>2014-06-24 17:05:56 +0000 (Tue, 24 Jun 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>Ensure that a `has_children` parameter is given to `Walker::start_el()`.

Adds unit tests.

Props scribu, obenland.
Fixes <a href="http://core.trac.wordpress.org/ticket/14041">#14041</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclasswpwalkerphp">trunk/src/wp-includes/class-wp-walker.php</a></li>
<li><a href="#trunksrcwpincludescommenttemplatephp">trunk/src/wp-includes/comment-template.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestscommentwalkerphp">trunk/tests/phpunit/tests/comment/walker.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesclasswpwalkerphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/class-wp-walker.php (28823 => 28824)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/class-wp-walker.php        2014-06-24 16:05:54 UTC (rev 28823)
+++ trunk/src/wp-includes/class-wp-walker.php   2014-06-24 17:05:56 UTC (rev 28824)
</span><span class="lines">@@ -40,6 +40,15 @@
</span><span class="cx">  protected $max_pages = 1;
</span><span class="cx"> 
</span><span class="cx">  /**
</span><ins>+        * Wether the current element has children or not. To be used in start_el()
+        *
+        * @since 4.0.0
+        * @var bool
+        * @access protected
+        */
+       protected $has_children;
+
+       /**
</ins><span class="cx">    * Make private properties readable for backwards compatibility
</span><span class="cx">   *
</span><span class="cx">   * @since 4.0.0
</span><span class="lines">@@ -172,15 +181,17 @@
</span><span class="cx">                  return;
</span><span class="cx"> 
</span><span class="cx">          $id_field = $this->db_fields['id'];
</span><ins>+               $id       = $element->$id_field;
</ins><span class="cx"> 
</span><span class="cx">          //display this element
</span><del>-               if ( isset( $args[0] ) && is_array( $args[0] ) )
-                       $args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );
</del><ins>+                $this->has_children = ! empty( $children_elements[ $id ] );
+               if ( isset( $args[0] ) && is_array( $args[0] ) ) {
+                       $args[0]['has_children'] = $this->has_children; // Backwards compatibility.
+               }
+
</ins><span class="cx">           $cb_args = array_merge( array(&$output, $element, $depth), $args);
</span><span class="cx">          call_user_func_array(array($this, 'start_el'), $cb_args);
</span><span class="cx"> 
</span><del>-               $id = $element->$id_field;
-
</del><span class="cx">           // descend only when the depth is right and there are childrens for this element
</span><span class="cx">          if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunksrcwpincludescommenttemplatephp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/comment-template.php (28823 => 28824)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/comment-template.php       2014-06-24 16:05:54 UTC (rev 28823)
+++ trunk/src/wp-includes/comment-template.php  2014-06-24 17:05:56 UTC (rev 28824)
</span><span class="lines">@@ -1784,7 +1784,7 @@
</span><span class="cx">                  $add_below = 'div-comment';
</span><span class="cx">          }
</span><span class="cx"> ?>
</span><del>-               <<?php echo $tag; ?> <?php comment_class( empty( $args['has_children'] ) ? '' : 'parent' ); ?> id="comment-<?php comment_ID(); ?>">
</del><ins>+                <<?php echo $tag; ?> <?php comment_class( $this->has_children ? 'parent' : '' ); ?> id="comment-<?php comment_ID(); ?>">
</ins><span class="cx">           <?php if ( 'div' != $args['style'] ) : ?>
</span><span class="cx">          <div id="div-comment-<?php comment_ID(); ?>" class="comment-body">
</span><span class="cx">          <?php endif; ?>
</span><span class="lines">@@ -1830,7 +1830,7 @@
</span><span class="cx">  protected function html5_comment( $comment, $depth, $args ) {
</span><span class="cx">          $tag = ( 'div' === $args['style'] ) ? 'div' : 'li';
</span><span class="cx"> ?>
</span><del>-               <<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( empty( $args['has_children'] ) ? '' : 'parent' ); ?>>
</del><ins>+                <<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( $this->has_children ? 'parent' : '' ); ?>>
</ins><span class="cx">                   <article id="div-comment-<?php comment_ID(); ?>" class="comment-body">
</span><span class="cx">                          <footer class="comment-meta">
</span><span class="cx">                                  <div class="comment-author vcard">
</span></span></pre></div>
<a id="trunktestsphpunittestscommentwalkerphp"></a>
<div class="addfile"><h4>Added: trunk/tests/phpunit/tests/comment/walker.php (0 => 28824)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/tests/phpunit/tests/comment/walker.php                             (rev 0)
+++ trunk/tests/phpunit/tests/comment/walker.php        2014-06-24 17:05:56 UTC (rev 28824)
</span><span class="lines">@@ -0,0 +1,48 @@
</span><ins>+<?php
+
+/**
+ * @group comment
+ */
+class Tests_Comment_Walker extends WP_UnitTestCase {
+
+       function setUp() {
+               parent::setUp();
+
+               $this->post_id = $this->factory->post->create();
+       }
+
+       /**
+        * @ticket 14041
+        */
+       function test_has_children() {
+               $comment_parent = $this->factory->comment->create( array( 'comment_post_ID' => $this->post_id ) );
+               $comment_child  = $this->factory->comment->create( array( 'comment_post_ID' => $this->post_id, 'comment_parent' => $comment_parent ) );
+               $comment_parent = get_comment( $comment_parent );
+               $comment_child  = get_comment( $comment_child  );
+
+               $comment_walker   = new Walker_Comment();
+               $comment_callback = new Comment_Callback_Test( $this, $comment_walker );
+
+               wp_list_comments( array( 'callback' => array( $comment_callback, 'comment' ), 'walker' => $comment_walker, 'echo' => false ), array( $comment_parent, $comment_child ) );
+               wp_list_comments( array( 'callback' => array( $comment_callback, 'comment' ), 'walker' => $comment_walker, 'echo' => false ), array( $comment_child, $comment_parent ) );
+       }
+}
+
+class Comment_Callback_Test {
+       public function __construct( Tests_Comment_Walker $test_walker, Walker_Comment $walker ) {
+               $this->test_walker = $test_walker;
+               $this->walker      = $walker;
+       }
+
+       public function comment( $comment, $args, $depth ) {
+               if ( 1 == $depth ) {
+                       $this->test_walker->assertTrue( $this->walker->has_children );
+                       $this->test_walker->assertTrue( $args['has_children']       ); // Back compat
+               }
+
+               else if ( 2 == $depth ) {
+                       $this->test_walker->assertFalse( $this->walker->has_children );
+                       $this->test_walker->assertFalse( $args['has_children']       ); // Back compat
+               }
+       }
+}
</ins></span></pre>
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