csv/json data preview patch after adding data schema for arrow data files

Author: RandomFractals

package-lock.json

@@ -2,7 +2,7 @@
   "name": "vscode-data-preview",
   "displayName": "Data Preview",
   "description": "Data Preview",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "publisher": "RandomFractalsInc",
   "author": "Taras Novak",
   "contributors": [
@@ -25,7 +25,8 @@
     "json",
     "json data",
     "arrow",
-    "arrow data"
+    "arrow data",
+    "excel"
   ],
   "engines": {
     "vscode": "^1.32.3"

package.json

@@ -98,12 +98,16 @@
             // initialize perspective viewer
             console.log(`data.preview:refresh(): initializing view data for: ${data.fileName}`);
             viewer.restore(viewConfig);
-            // viewer.columns = viewConfig['columns'];
-            viewer.load(data.schema);
-            viewer.update(tableData);
+            if (data.schema !== undefined && Object.keys(data.schema).length > 0) {
+              // viewer.columns = viewConfig['columns'];
+              viewer.load(data.schema);
+              viewer.update(tableData);
+            }
+            else {
+              viewer.load(tableData);
+            }
             viewer.toggleConfig();
-          } else {
-            // update viewer data without toggles reset
+          } else {  // update viewer data without toggles reset
             console.log(`data.preview:refresh(): updating view data for: ${data.fileName}`);
             viewer.clear();
             viewer.update(tableData);