dom/bindings/CallbackInterface.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   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 "mozilla/dom/CallbackInterface.h"
   8 #include "jsapi.h"
   9 #include "mozilla/dom/BindingUtils.h"
  10 #include "nsPrintfCString.h"
  11
  12 namespace mozilla {
  13 namespace dom {
  14
  15 bool
  16 CallbackInterface::GetCallableProperty(JSContext* cx, JS::Handle<jsid> aPropId,
  17                                        JS::MutableHandle<JS::Value> aCallable)
  18 {
  19   if (!JS_GetPropertyById(cx, CallbackPreserveColor(), aPropId, aCallable)) {
  20     return false;
  21   }
  22   if (!aCallable.isObject() ||
  23       !JS::IsCallable(&aCallable.toObject())) {
  24     char* propName =
  25       JS_EncodeString(cx, JS_FORGET_STRING_FLATNESS(JSID_TO_FLAT_STRING(aPropId)));
  26     nsPrintfCString description("Property '%s'", propName);
  27     JS_free(cx, propName);
  28     ThrowErrorMessage(cx, MSG_NOT_CALLABLE, description.get());
  29     return false;
  30   }
  31
  32   return true;
  33 }
  34
  35 } // namespace dom
  36 } // namespace mozilla