add saveOrigValue option for render()

now it's useful only for tests

jsonform.gadget.js

@@ -599,6 +599,7 @@
         key: options.key,
         value: JSON.stringify(options.value) || '""',
         schema: JSON.stringify(options.schema),
+        saveOrigValue: options.saveOrigValue,
         schema_url: options.schema_url,
         editable: options.editable === undefined ? true : options.editable
       });
@@ -677,6 +678,7 @@
             schema: schema,
             schema_path: "",
             document: json_document,
+            saveOrigValue: g.state.saveOrigValue,
             required: true,
             top: true
           });

jsonform/gadget_json_generated_form_child.js

@@ -274,6 +274,7 @@
           schema_path: options.schema_path,
           document: options.default_dict,
           display_label: options.parent_type !== "array",
+          saveOrigValue: g.props.saveOrigValue,
           scope: scope
         })
           .push(function () {
@@ -720,6 +721,19 @@
     if (getDocumentType(json_field.type) === "string") {
       type = json_field.type;
     } // else json_field.type is array so we use type
+    if (["object", "array"].indexOf(type) >= 0 &&
+        default_value !== undefined &&
+        getDocumentType(default_value) !== type) {
+      if (gadget.props.saveOrigValue) {
+        // XXX is not useful for user
+        // only for tests
+        json_field = {
+          const: default_value
+        };
+      } else {
+        gadget.props.changed = true;
+      }
+    }
     if (type === undefined && default_value !== undefined) {
       type = getDocumentType(default_value);
     }
@@ -1617,6 +1631,7 @@
         schema = options.schema,
         root;
       g.props.change = false;
+      g.props.saveOrigValue = options.saveOrigValue;
       g.props.inputs = [];
       g.props.add_buttons = [];
       g.props.add_custom_data = {};

test/jsonform_test.js

@@ -178,7 +178,8 @@
         .push(function (g) {
           var opt = {
             key: key,
-            value: value
+            value: value,
+            saveOrigValue: true
           };
           gadget = g;
           if (schema !== undefined) {