Ticket #4874: 4874.patch

_source/plugins/clipboard/plugin.js

@@ -303 +303 @@
                                         body.on( ( mode == 'text' && CKEDITOR.env.ie ) ? 'paste' : 'beforepaste',
                                                 function( evt )
                                                 {
+                                                        if( depressBeforePasteEvent )
+                                                                return;
+
                                                         getClipboardData.call( editor, evt, mode, function ( data )
                                                         {
                                                                 // The very last guard to make sure the
@@ -321 +324 @@
                                 // If the "contextmenu" plugin is loaded, register the listeners.
                                 if ( editor.contextMenu )
                                 {
+                                        var depressBeforePasteEvent;
                                         function stateFromNamedCommand( command )
                                         {
-                                                return editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
+                                                // IE Bug: queryCommandEnabled('paste') fires also 'beforepaste',
+                                                // guard to distinguish from the ordinary sources( either
+                                                // keyboard paste or execCommand ) (#4874).
+                                                CKEDITOR.env.ie && command == 'Paste'&& ( depressBeforePasteEvent = 1 );
+
+                                                var retval = editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
+                                                depressBeforePasteEvent = 0;
+                                                return retval;
                                         }
 
                                         editor.contextMenu.addListener( function()