Ticket #5307: 5307.patch

_source/plugins/dialog/plugin.js

@@ -893 +893 @@
 
                         page.setAttribute( 'aria-labelledby', tabId );
 
-                        // If only a single page exist, a different style is used in the central pane.
-                        if ( this._.pageCount === 0 )
-                                this.parts.dialog.addClass( 'cke_single_page' );
-                        else
-                                this.parts.dialog.removeClass( 'cke_single_page' );
-
                         // Take records for the tabs and elements created.
                         this._.tabs[ contents.id ] = [ tab, page ];
                         this._.tabIdList.push( contents.id );
-                        this._.pageCount++;
+                        !contents.hidden && this._.pageCount++;
                         this._.lastTab = tab;
 
+                        // If only a single page exist, a different style is used in the central pane.
+                        this.parts.dialog[ ( this._.pageCount === 1 ? 'add' : 'remove' ) + 'Class' ]( 'cke_single_page' ); 
+
                         var contentMap = this._.contents[ contents.id ] = {},
                                 cursor,
                                 children = vbox.getChild();
@@ -973 +970 @@
                         if ( !tab )
                                 return;
                         tab.hide();
+                        this._.pageCount--;
                 },
 
                 /**
@@ -987 +985 @@
                         if ( !tab )
                                 return;
                         tab.show();
+                        this._.pageCount++;
                 },
 
                 /**