TinyMCE: Verify HTML in captions. props azaozz

Merges [30435] to the 3.9 branch.

Built from https://develop.svn.wordpress.org/branches/3.9@30437


git-svn-id: http://core.svn.wordpress.org/branches/3.9@30432 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/tinymce/plugins/wpeditimage/plugin.js

@@ -1,6 +1,7 @@
 /* global tinymce */
 tinymce.PluginManager.add( 'wpeditimage', function( editor ) {
-	var toolbarActive = false;
+	var serializer,
+		toolbarActive = false;
 
 	function parseShortcode( content ) {
 		return content.replace( /(?:<p>)?\[(?:wp_)?caption([^\]]+)\]([\s\S]+?)\[\/(?:wp_)?caption\](?:<\/p>)?/g, function( a, b, c ) {
@@ -208,6 +209,19 @@ tinymce.PluginManager.add( 'wpeditimage', function( editor ) {
 		return node && !! ( node.textContent || node.innerText );
 	}
 
+	// Verify HTML in captions
+	function verifyHTML( caption ) {
+		if ( ! caption || ( caption.indexOf( '<' ) === -1 && caption.indexOf( '>' ) === -1 ) ) {
+			return caption;
+		}
+
+		if ( ! serializer ) {
+			serializer = new tinymce.html.Serializer( {}, editor.schema );
+		}
+
+		return serializer.serialize( editor.parser.parse( caption, { forced_root_block: false } ) );
+	}
+
 	function updateImage( imageNode, imageData ) {
 		var classes, className, node, html, parent, wrap, linkNode,
 			captionNode, dd, dl, id, attrs, linkAttrs, width, height,
@@ -285,6 +299,7 @@ tinymce.PluginManager.add( 'wpeditimage', function( editor ) {
 		}
 
 		if ( imageData.caption ) {
+			imageData.caption = verifyHTML( imageData.caption );
 
 			id = imageData.attachment_id ? 'attachment_' + imageData.attachment_id : null;
 			className = 'wp-caption align' + ( imageData.align || 'none' );
@@ -563,6 +578,7 @@ tinymce.PluginManager.add( 'wpeditimage', function( editor ) {
 
 				// Convert remaining line breaks to <br>
 				caption = caption.replace( /(<br[^>]*>)\s*\n\s*/g, '$1' ).replace( /\s*\n\s*/g, '<br />' );
+				caption = verifyHTML( caption );
 			}
 
 			if ( ! imgNode ) {