dom/bindings/ToJSValue.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
   2 /* vim: set ts=2 sw=2 et tw=79: */
   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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/ToJSValue.h"
   8 #include "mozilla/dom/DOMException.h"
   9 #include "mozilla/dom/Exceptions.h"
  10 #include "nsAString.h"
  11 #include "nsContentUtils.h"
  12 #include "nsStringBuffer.h"
  13 #include "xpcpublic.h"
  14
  15 namespace mozilla {
  16 namespace dom {
  17
  18 bool
  19 ToJSValue(JSContext* aCx, const nsAString& aArgument,
  20           JS::MutableHandle<JS::Value> aValue)
  21 {
  22   // Make sure we're called in a compartment
  23   MOZ_ASSERT(JS::CurrentGlobalOrNull(aCx));
  24
  25 // XXXkhuey I'd love to use xpc::NonVoidStringToJsval here, but it requires
  26   // a non-const nsAString for silly reasons.
  27   nsStringBuffer* sharedBuffer;
  28   if (!XPCStringConvert::ReadableToJSVal(aCx, aArgument, &sharedBuffer,
  29                                          aValue)) {
  30     return false;
  31   }
  32
  33   if (sharedBuffer) {
  34     NS_ADDREF(sharedBuffer);
  35   }
  36
  37   return true;
  38 }
  39
  40
  41 namespace tojsvalue_detail {
  42
  43 bool
  44 ISupportsToJSValue(JSContext* aCx,
  45                    nsISupports* aArgument,
  46                    JS::MutableHandle<JS::Value> aValue)
  47 {
  48   nsresult rv = nsContentUtils::WrapNative(aCx, aArgument, aValue);
  49   return NS_SUCCEEDED(rv);
  50 }
  51
  52 } // namespace tojsvalue_detail
  53
  54 bool
  55 ToJSValue(JSContext* aCx,
  56           nsresult aArgument,
  57           JS::MutableHandle<JS::Value> aValue)
  58 {
  59   nsRefPtr<Exception> exception = CreateException(aCx, aArgument);
  60   return ToJSValue(aCx, exception, aValue);
  61 }
  62
  63 bool
  64 ToJSValue(JSContext* aCx,
  65           ErrorResult& aArgument,
  66           JS::MutableHandle<JS::Value> aValue)
  67 {
  68   MOZ_ASSERT(aArgument.Failed());
  69   DebugOnly<bool> throwResult = ThrowMethodFailedWithDetails(aCx, aArgument, "", "");
  70   MOZ_ASSERT(!throwResult);
  71   DebugOnly<bool> getPendingResult = JS_GetPendingException(aCx, aValue);
  72   MOZ_ASSERT(getPendingResult);
  73   JS_ClearPendingException(aCx);
  74   return true;
  75 }
  76
  77 } // namespace dom
  78 } // namespace mozilla