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+/* 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/. */
+
+/* nsIVariant based Property Bag support. */
+
+#include "nsIPropertyBag.idl"
+
+[scriptable, uuid(625cfd1e-da1e-4417-9ee9-dbc8e0b3fd79)]
+interface nsIPropertyBag2 : nsIPropertyBag
+{
+ // Accessing a property as a different type may attempt conversion to the
+ // requested value
+
+ int32_t getPropertyAsInt32 (in AString prop);
+ uint32_t getPropertyAsUint32 (in AString prop);
+ int64_t getPropertyAsInt64 (in AString prop);
+ uint64_t getPropertyAsUint64 (in AString prop);
+ double getPropertyAsDouble (in AString prop);
+ AString getPropertyAsAString (in AString prop);
+ ACString getPropertyAsACString (in AString prop);
+ AUTF8String getPropertyAsAUTF8String (in AString prop);
+ boolean getPropertyAsBool (in AString prop);
+
+ /**
+ * This method returns null if the value exists, but is null.
+ *
+ * Note: C++ callers should not use this method. They should use the
+ * typesafe `do_GetProperty` wrapper instead.
+ */
+ void getPropertyAsInterface (in AString prop,
+ in nsIIDRef iid,
+ [iid_is(iid), retval] out nsQIResult result);
+
+ /**
+ * This method returns null if the value does not exist,
+ * or exists but is null.
+ */
+ nsIVariant get (in AString prop);
+
+ /**
+ * Check for the existence of a key.
+ */
+ boolean hasKey (in AString prop);
+};
+
+
+%{C++
+#include "nsCOMPtr.h"
+#include "nsAString.h"
+
+class MOZ_STACK_CLASS nsGetProperty final : public nsCOMPtr_helper {
+ public:
+ nsGetProperty(nsIPropertyBag2* aPropBag, const nsAString& aPropName, nsresult* aError)
+ : mPropBag(aPropBag), mPropName(aPropName), mErrorPtr(aError) {}
+
+ virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+ nsIPropertyBag2* MOZ_NON_OWNING_REF mPropBag;
+ const nsAString& mPropName;
+ nsresult* mErrorPtr;
+};
+
+/**
+ * A typesafe wrapper around nsIPropertyBag2::GetPropertyAsInterface. Similar
+ * to the `do_QueryInterface` family of functions, when assigned to a
+ * `nsCOMPtr` of a given type, attempts to query the given property to that
+ * type.
+ *
+ * If `aError` is passed, the return value of `GetPropertyAsInterface` is
+ * stored in it.
+ */
+inline const nsGetProperty do_GetProperty(nsIPropertyBag2* aPropBag,
+ const nsAString& aPropName,
+ nsresult* aError = 0) {
+ return nsGetProperty(aPropBag, aPropName, aError);
+}
+
+%}