Ticket #8919: 8919.patch

_source/plugins/contextmenu/plugin.js

@@ -33 +33 @@
                         {
                                 addTarget : function( element, nativeContextMenuOnCtrl )
                                 {
+                                        var doc = element instanceof CKEDITOR.dom.document ? element :
+                                                  element.getDocument();
+
                                         // Opera doesn't support 'contextmenu' event, we have duo approaches employed here:
                                         // 1. Inherit the 'button override' hack we introduced in v2 (#4530), while this require the Opera browser
                                         //  option 'Allow script to detect context menu/right click events' to be always turned on.
@@ -84 +87 @@
                                                 } );
                                         }
 
+                                        // Special handling for context menu opened on body margins.
+                                        if ( CKEDITOR.env.ie && element.equals( doc ) )
+                                        {
+                                                function contextMenuBodyMargin( fn ) {
+                                                        return function( evt ) {
+                                                                evt = evt.data;
+                                                                if ( evt.$.button == 2 && evt.getTarget().equals( htmlEl ) ) {
+                                                                        fn();
+                                                                }
+                                                        };
+                                                }
+
+                                                var htmlEl = doc.getDocumentElement();
+
+                                                htmlEl.on( 'mouseup', contextMenuBodyMargin( function()
+                                                {
+                                                        // We must clear any existing locked selection before-hand,
+                                                        // e.g. an opened float panel.
+                                                        doc.getSelection().unlock();
+                                                } ), null, null, -1 );
+
+                                                htmlEl.on( 'mouseup', contextMenuBodyMargin( function()
+                                                {
+                                                        // Lock the selection right before native event destroy the
+                                                        // selection.
+                                                        doc.getSelection().lock();
+                                                } ), null, null, 9999 );
+                                        }
+
                                         element.on( 'contextmenu', function( event )
                                                 {
                                                         var domEvent = event.data;
@@ -104 +136 @@
 
                                                         CKEDITOR.tools.setTimeout( function()
                                                                 {
+                                                                        // Restore properly the locked selection, for IE.
+                                                                        var sel = doc.getSelection();
+                                                                        sel.isLocked && sel.unlock( 1 );
+
                                                                         this.open( offsetParent, null, offsetX, offsetY );
 
                                                                 // IE needs a short while to allow selection change before opening menu. (#7908)