make clean data work for non-plain-object annotation / shape items

Author: etpinard

src/plot_api/helpers.js

@@ -102,13 +102,12 @@ exports.cleanLayout = function(layout) {
         }
     }
 
-    if(layout.annotations !== undefined && !Array.isArray(layout.annotations)) {
-        Lib.warn('Annotations must be an array.');
-        delete layout.annotations;
-    }
     var annotationsLen = (layout.annotations || []).length;
     for(i = 0; i < annotationsLen; i++) {
         var ann = layout.annotations[i];
+
+        if(!Lib.isPlainObject(ann)) continue;
+
         if(ann.ref) {
             if(ann.ref === 'paper') {
                 ann.xref = 'paper';
@@ -120,17 +119,17 @@ exports.cleanLayout = function(layout) {
             }
             delete ann.ref;
         }
+
         cleanAxRef(ann, 'xref');
         cleanAxRef(ann, 'yref');
     }
 
-    if(layout.shapes !== undefined && !Array.isArray(layout.shapes)) {
-        Lib.warn('Shapes must be an array.');
-        delete layout.shapes;
-    }
     var shapesLen = (layout.shapes || []).length;
     for(i = 0; i < shapesLen; i++) {
         var shape = layout.shapes[i];
+
+        if(!Lib.isPlainObject(shape)) continue;
+
         cleanAxRef(shape, 'xref');
         cleanAxRef(shape, 'yref');
     }