Bug 822470 part 2. Create a CallbackInterface helper class. r=peterv

--HG--
rename : dom/bindings/CallbackFunction.h => dom/bindings/CallbackInterface.h

dom/bindings/CallbackInterface.h

@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * A common base class for representing WebIDL callback interface types in C++.
+ *
+ * This class implements common functionality like lifetime management,
+ * initialization with the callback object, and setup of the call environment.
+ * Subclasses corresponding to particular callback interface types should
+ * provide methods that actually do the various necessary calls.
+ */
+
+#ifndef mozilla_dom_CallbackInterface_h
+#define mozilla_dom_CallbackInterface_h
+
+#include "mozilla/dom/CallbackObject.h"
+
+namespace mozilla {
+namespace dom {
+
+class CallbackInterface : public CallbackObject
+{
+public:
+  /**
+   * Create a CallbackInterface.  aCallback is the callback object we're
+   * wrapping.  aOwner is the object that will be receiving this
+   * CallbackInterface as a method argument, if any.  We need this so we can
+   * store our callable in the same compartment as our owner.  If *aInited is
+   * set to false, an exception has been thrown.
+   */
+  CallbackInterface(JSContext* cx, JSObject* aOwner, JSObject* aCallback,
+                   bool* aInited)
+    : CallbackObject(cx, aOwner, aCallback, aInited)
+  {
+  }
+
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_CallbackFunction_h

dom/bindings/Makefile.in

@@ -60,6 +60,7 @@ EXPORTS_$(binding_include_path) = \
   BindingDeclarations.h \
   BindingUtils.h \
   CallbackFunction.h \
+  CallbackInterface.h \
   CallbackObject.h \
   DOMJSClass.h \
   DOMJSProxyHandler.h \