Comments: in `comment_form()` when replying to a comment ensure to set focus on the first focusable form element, regardless of what that form element is.

Props azaozz.
See #29974.
Built from https://develop.svn.wordpress.org/trunk@35593


git-svn-id: http://core.svn.wordpress.org/trunk@35557 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/comment-reply.js

@@ -1,9 +1,17 @@
 var addComment = {
 	moveForm: function( commId, parentId, respondId, postId ) {
-		var t = this, div, comm = t.I(commId), respond = t.I(respondId), cancel = t.I('cancel-comment-reply-link'), parent = t.I('comment_parent'), post = t.I('comment_post_ID');
+		var div, element, node, style, cssHidden,
+			t           = this,
+			comm        = t.I( commId ),
+			respond     = t.I( respondId ),
+			cancel      = t.I( 'cancel-comment-reply-link' ),
+			parent      = t.I( 'comment_parent' ),
+			post        = t.I( 'comment_post_ID' ),
+			commentForm = respond.getElementsByTagName( 'form' )[0];
 
-		if ( ! comm || ! respond || ! cancel || ! parent )
+		if ( ! comm || ! respond || ! cancel || ! parent || ! commentForm ) {
 			return;
+		}
 
 		t.respondId = respondId;
 		postId = postId || false;
@@ -16,16 +24,20 @@ var addComment = {
 		}
 
 		comm.parentNode.insertBefore( respond, comm.nextSibling );
-		if ( post && postId )
+		if ( post && postId ) {
 			post.value = postId;
+		}
 		parent.value = parentId;
 		cancel.style.display = '';
 
 		cancel.onclick = function() {
-			var t = addComment, temp = t.I('wp-temp-form-div'), respond = t.I(t.respondId);
+			var t       = addComment,
+				temp    = t.I( 'wp-temp-form-div' ),
+				respond = t.I( t.respondId );
 
-			if ( ! temp || ! respond )
+			if ( ! temp || ! respond ) {
 				return;
+			}
 
 			t.I( 'comment_parent' ).value = '0';
 			temp.parentNode.insertBefore( respond, temp );
@@ -35,13 +47,46 @@ var addComment = {
 			return false;
 		};
 
-		try { t.I('comment').focus(); }
-		catch(e) {}
+		// Set initial focus to the first form focusable element.
+		try {
+			for ( var i = 0; i < commentForm.elements.length; i++ ) {
+				element = commentForm.elements[i];
+
+				// Skip form elements that are hidden or disabled.
+				if ( 'hidden' === element.type || element.hasAttribute( 'disabled' ) ) {
+					continue;
+				}
+
+				if ( 'getComputedStyle' in window ) {
+					node = element;
+					cssHidden = false;
+
+					while( node.parentNode ) {
+						style = window.getComputedStyle( node );
+
+						if ( style.display === 'none' || style.visibility === 'hidden' ) {
+							cssHidden = true;
+							break;
+						}
+
+						node = node.parentNode;
+					}
+
+					if ( cssHidden ) {
+						continue;
+					}
+				}
+
+				element.focus();
+				// Stop after the first focusable element.
+				break;
+			}
+		} catch( er ) {}
 
 		return false;
 	},
 
-	I : function(e) {
-		return document.getElementById(e);
+	I: function( id ) {
+		return document.getElementById( id );
 	}
 };

wp-includes/js/comment-reply.min.js

@@ -1 +1 @@
-var addComment={moveForm:function(a,b,c,d){var e,f=this,g=f.I(a),h=f.I(c),i=f.I("cancel-comment-reply-link"),j=f.I("comment_parent"),k=f.I("comment_post_ID");if(g&&h&&i&&j){f.respondId=c,d=d||!1,f.I("wp-temp-form-div")||(e=document.createElement("div"),e.id="wp-temp-form-div",e.style.display="none",h.parentNode.insertBefore(e,h)),g.parentNode.insertBefore(h,g.nextSibling),k&&d&&(k.value=d),j.value=b,i.style.display="",i.onclick=function(){var a=addComment,b=a.I("wp-temp-form-div"),c=a.I(a.respondId);if(b&&c)return a.I("comment_parent").value="0",b.parentNode.insertBefore(c,b),b.parentNode.removeChild(b),this.style.display="none",this.onclick=null,!1};try{f.I("comment").focus()}catch(l){}return!1}},I:function(a){return document.getElementById(a)}};
+var addComment={moveForm:function(a,b,c,d){var e,f,g,h,i,j=this,k=j.I(a),l=j.I(c),m=j.I("cancel-comment-reply-link"),n=j.I("comment_parent"),o=j.I("comment_post_ID"),p=l.getElementsByTagName("form")[0];if(k&&l&&m&&n&&p){j.respondId=c,d=d||!1,j.I("wp-temp-form-div")||(e=document.createElement("div"),e.id="wp-temp-form-div",e.style.display="none",l.parentNode.insertBefore(e,l)),k.parentNode.insertBefore(l,k.nextSibling),o&&d&&(o.value=d),n.value=b,m.style.display="",m.onclick=function(){var a=addComment,b=a.I("wp-temp-form-div"),c=a.I(a.respondId);if(b&&c)return a.I("comment_parent").value="0",b.parentNode.insertBefore(c,b),b.parentNode.removeChild(b),this.style.display="none",this.onclick=null,!1};try{for(var q=0;q<p.elements.length;q++)if(f=p.elements[q],"hidden"!==f.type&&!f.hasAttribute("disabled")){if("getComputedStyle"in window){for(g=f,i=!1;g.parentNode;){if(h=window.getComputedStyle(g),"none"===h.display||"hidden"===h.visibility){i=!0;break}g=g.parentNode}if(i)continue}f.focus();break}}catch(r){}return!1}},I:function(a){return document.getElementById(a)}};

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-beta3-35592';
+$wp_version = '4.4-beta3-35593';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.