From 14e5a08f5c4f742e3dd5905331097dd36653c486 Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Mon, 16 Jan 2017 01:05:33 +0000
Subject: [PATCH] Formatting: fix `wpautop()` to stop adding paragraph tags
 around `<figcaption>`.

Fixes #39307 for trunk.

git-svn-id: https://develop.svn.wordpress.org/trunk@39912 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/js/editor.js      | 7 ++++++-
 src/wp-includes/formatting.php | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/wp-admin/js/editor.js b/src/wp-admin/js/editor.js
index 17d296276d..a63a51cc53 100644
--- a/src/wp-admin/js/editor.js
+++ b/src/wp-admin/js/editor.js
@@ -167,7 +167,7 @@
 		 * @return {string} The content with stripped paragraph tags.
 		 */
 		function removep( html ) {
-			var blocklist = 'blockquote|ul|ol|li|dl|dt|dd|table|thead|tbody|tfoot|tr|th|td|h[1-6]|fieldset',
+			var blocklist = 'blockquote|ul|ol|li|dl|dt|dd|table|thead|tbody|tfoot|tr|th|td|h[1-6]|fieldset|figure',
 				blocklist1 = blocklist + '|div|p',
 				blocklist2 = blocklist + '|pre',
 				preserve_linebreaks = false,
@@ -331,6 +331,11 @@
 				});
 			}
 
+			if ( text.indexOf( '<figcaption' ) !== -1 ) {
+				text = text.replace( /\s*(<figcaption[^>]*>)/g, '$1' );
+				text = text.replace( /<\/figcaption>\s*/g, '</figcaption>' );
+			}
+
 			// Keep <br> tags inside captions.
 			if ( text.indexOf( '[caption' ) !== -1 ) {
 				preserve_br = true;
diff --git a/src/wp-includes/formatting.php b/src/wp-includes/formatting.php
index 31352cdeb2..a57a481ced 100644
--- a/src/wp-includes/formatting.php
+++ b/src/wp-includes/formatting.php
@@ -506,6 +506,12 @@ function wpautop( $pee, $br = true ) {
 		$pee = preg_replace( '%\s*(<(?:source|track)[^>]*>)\s*%', '$1', $pee );
 	}
 
+	// Collapse line breaks before and after <figcaption> elements.
+	if ( strpos( $pee, '<figcaption' ) !== false ) {
+		$pee = preg_replace( '|\s*(<figcaption[^>]*>)|', '$1', $pee );
+		$pee = preg_replace( '|</figcaption>\s*|', '</figcaption>', $pee );
+	}
+
 	// Remove more than two contiguous line breaks.
 	$pee = preg_replace("/\n\n+/", "\n\n", $pee);