Rework to register Document and add XMLSerializer

src/ol/dom.js

@@ -123,31 +123,26 @@ export function replaceChildren(node, children) {
   }
 }
 
-let domImplementation_ = undefined;
+let document_ = undefined;
 
 /**
- * Register an external DOMImplementation. Can be used to supply a DOMImplementation
- * in non-browser environments.
+ * Register a Document to use when creating nodes for XML serializations. Can be used
+ * to inject a Document where there is no globally available implementation.
  *
- * @param {DOMImplementation} domImplementation A DOMImplementation.
+ * @param {Document} document A Document.
  * @api
  */
-export function registerDOMImplementation(domImplementation) {
-  domImplementation_ = domImplementation;
+export function registerDocument(document) {
+  document_ = document;
 }
 
-let document_ = undefined;
-
 /**
  * Get a document that should be used when creating nodes for XML serializations.
  * @return {Document} The document.
  */
 export function getDocument() {
-  if (document_ === undefined) {
-    if (!domImplementation_ && typeof document !== 'undefined') {
-      domImplementation_ = document.implementation;
-    }
-    document_ = domImplementation_.createDocument('', '', null);
+  if (document_ === undefined && typeof document !== 'undefined') {
+    document_ = document.implementation.createDocument('', '', null);
   }
   return document_;
 }

src/ol/format/XMLFeature.js

@@ -5,7 +5,7 @@ import {abstract} from '../util.js';
 import {extend} from '../array.js';
 import FeatureFormat from '../format/Feature.js';
 import FormatType from '../format/FormatType.js';
-import {isDocument, parse} from '../xml.js';
+import {isDocument, parse, getXMLSerializer} from '../xml.js';
 
 /**
  * @classdesc
@@ -23,7 +23,7 @@ class XMLFeature extends FeatureFormat {
      * @type {XMLSerializer}
      * @private
      */
-    this.xmlSerializer_ = new XMLSerializer();
+    this.xmlSerializer_ = getXMLSerializer();
   }
 
   /**

src/ol/xml.js

@@ -486,3 +486,27 @@ export function pushSerializeAndPop(object, serializersNS, nodeFactory, values,
   serialize(serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this);
   return /** @type {O|undefined} */ (objectStack.pop());
 }
+
+let xmlSerializer_ = undefined;
+
+/**
+ * Register a XMLSerializer. Can be used
+ * to inject a XMLSerializer where there is no globally available implementation.
+ *
+ * @param {XMLSerializer} xmlSerializer A XMLSerializer.
+ * @api
+ */
+export function registerXMLSerializer(xmlSerializer) {
+  xmlSerializer_ = xmlSerializer;
+}
+
+/**
+ * Get a document that should be used when creating nodes for XML serializations.
+ * @return {XMLSerializer} The XMLSerializer.
+ */
+export function getXMLSerializer() {
+  if (xmlSerializer_ === undefined && typeof XMLSerializer !== 'undefined') {
+    xmlSerializer_ = new XMLSerializer();
+  }
+  return xmlSerializer_;
+}