fix bug in getting defaultView from editor ref

src/component/base/DraftEditor.react.js

@@ -449,7 +449,7 @@ class DraftEditor extends React.Component<DraftEditorProps, State> {
       // https://stackoverflow.com/questions/44074747/componentdidmount-called-before-ref-callback
 
       const castedEditor: HTMLElement = (this.editor: any);
-      (castedEditor ? castedEditor.ownerDocument : global).execCommand(
+      (castedEditor ? castedEditor.editor.ownerDocument : global).execCommand(
         'AutoUrlDetect',
         false,
         false,

src/component/handlers/edit/editOnInput.js

@@ -47,7 +47,7 @@ function editOnInput(editor: DraftEditor): void {
   }
   // at this point editor is not null for sure (after input)
   const castedEditorElement: HTMLElement = (editor: any);
-  const domSelection = castedEditorElement.ownerDocument.defaultView.getSelection();
+  const domSelection = castedEditorElement.editor.ownerDocument.defaultView.getSelection();
 
   const {anchorNode, isCollapsed} = domSelection;
   const isNotTextNode = anchorNode.nodeType !== Node.TEXT_NODE;