dom/payments/PaymentRequestUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "js/JSON.h"
   8 #include "nsContentUtils.h"
   9 #include "nsArrayUtils.h"
  10 #include "nsTString.h"
  11 #include "PaymentRequestUtils.h"
  12
  13 namespace mozilla::dom {
  14
  15 nsresult SerializeFromJSObject(JSContext* aCx, JS::Handle<JSObject*> aObject,
  16                                nsAString& aSerializedObject) {
  17   MOZ_ASSERT(aCx);
  18   JS::Rooted<JS::Value> value(aCx, JS::ObjectValue(*aObject));
  19   return SerializeFromJSVal(aCx, value, aSerializedObject);
  20 }
  21
  22 nsresult SerializeFromJSVal(JSContext* aCx, JS::Handle<JS::Value> aValue,
  23                             nsAString& aSerializedValue) {
  24   aSerializedValue.Truncate();
  25   nsAutoString serializedValue;
  26   JS::Rooted<JS::Value> value(aCx, aValue.get());
  27   NS_ENSURE_TRUE(nsContentUtils::StringifyJSON(aCx, &value, serializedValue),
  28                  NS_ERROR_XPC_BAD_CONVERT_JS);
  29   NS_ENSURE_TRUE(!serializedValue.IsEmpty(), NS_ERROR_FAILURE);
  30   aSerializedValue = serializedValue;
  31   return NS_OK;
  32 }
  33
  34 nsresult DeserializeToJSObject(const nsAString& aSerializedObject,
  35                                JSContext* aCx,
  36                                JS::MutableHandle<JSObject*> aObject) {
  37   MOZ_ASSERT(aCx);
  38   JS::Rooted<JS::Value> value(aCx);
  39   nsresult rv = DeserializeToJSValue(aSerializedObject, aCx, &value);
  40   if (NS_WARN_IF(NS_FAILED(rv))) {
  41     return rv;
  42   }
  43   if (value.isObject()) {
  44     aObject.set(&value.toObject());
  45   } else {
  46     aObject.set(nullptr);
  47   }
  48   return NS_OK;
  49 }
  50
  51 nsresult DeserializeToJSValue(const nsAString& aSerializedObject,
  52                               JSContext* aCx,
  53                               JS::MutableHandle<JS::Value> aValue) {
  54   MOZ_ASSERT(aCx);
  55   if (!JS_ParseJSON(aCx, aSerializedObject.BeginReading(),
  56                     aSerializedObject.Length(), aValue)) {
  57     return NS_ERROR_UNEXPECTED;
  58   }
  59   return NS_OK;
  60 }
  61
  62 }  // namespace mozilla::dom