WEBUI-1385: Fix update of Template properties

addons/nuxeo-template-rendering/elements/nuxeo-template-rendering-page.js

@@ -175,6 +175,7 @@ Polymer({
       type: String,
       value: 'view',
     },
+    originalDocument: Object,
   },
 
   _getProcessorLabel(processor) {
@@ -191,7 +192,8 @@ Polymer({
   _documentChanged() {
     if (this.document) {
       this.set('document.properties.tmpl:templateType', this.document.properties['tmpl:templateType'] || 'auto');
-      this.set('editedDocument', JSON.parse(JSON.stringify(this.document)));
+      this.set('editedDocument', this._parseJSON(this.document));
+      if (this.originalDocument === undefined) this.originalDocument = this._parseJSON(this.document);
     }
   },
 
@@ -216,12 +218,33 @@ Polymer({
   },
 
   _resetConfig() {
-    this.set('editedDocument', JSON.parse(JSON.stringify(this.document)));
+    this.set('editedDocument', this._parseJSON(this.document));
+  },
+
+  _findChangedValues(originalDocument, modifiedDocument) {
+    return Object.fromEntries(
+      Object.entries(modifiedDocument).filter(([key, val]) => {
+        if (typeof originalDocument[key] === 'object') {
+          return key in originalDocument && JSON.stringify(originalDocument[key]) !== JSON.stringify(val);
+        }
+        return key in originalDocument && originalDocument[key] !== val;
+      }),
+    );
+  },
+
+  _parseJSON(obj) {
+    return JSON.parse(JSON.stringify(obj));
   },
 
   _save() {
-    delete this.editedDocument.properties['dc:contributors'];
-    return this.$.doc.put();
+    const modified = this._parseJSON(this.editedDocument.properties);
+    const originalDocument = this._parseJSON(this.originalDocument.properties);
+    const changedvalue = this._findChangedValues(originalDocument, modified);
+
+    this.editedDocument.properties = changedvalue;
+    return this.$.doc.put().then(() => {
+      this.originalDocument = this._parseJSON(this.editedDocument);
+    });
   },
 
   _editConfig() {