+ editor.on( 'PastePlainTextToggle', function( event ) {
+ // Warn twice, then stop.
+ if ( event.state === true ) {
+ var times = parseInt( window.getUserSetting( 'editor_plain_text_paste_warning' ), 10 ) || 0;
+
+ if ( times < 2 ) {
+ window.setUserSetting( 'editor_plain_text_paste_warning', ++times );
+ }
+ }
+ });
+