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-rw-r--r--js/xpconnect/public/nsTArrayHelpers.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/js/xpconnect/public/nsTArrayHelpers.h b/js/xpconnect/public/nsTArrayHelpers.h
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index 000000000..aa0ce8198
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+++ b/js/xpconnect/public/nsTArrayHelpers.h
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef __NSTARRAYHELPERS_H__
+#define __NSTARRAYHELPERS_H__
+
+#include "jsapi.h"
+#include "nsContentUtils.h"
+#include "nsTArray.h"
+
+template <class T>
+inline nsresult
+nsTArrayToJSArray(JSContext* aCx, const nsTArray<T>& aSourceArray,
+ JS::MutableHandle<JSObject*> aResultArray)
+{
+ MOZ_ASSERT(aCx);
+
+ JS::Rooted<JSObject*> arrayObj(aCx,
+ JS_NewArrayObject(aCx, aSourceArray.Length()));
+ if (!arrayObj) {
+ NS_WARNING("JS_NewArrayObject failed!");
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ for (uint32_t index = 0; index < aSourceArray.Length(); index++) {
+ nsCOMPtr<nsISupports> obj;
+ nsresult rv = aSourceArray[index]->QueryInterface(NS_GET_IID(nsISupports), getter_AddRefs(obj));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ JS::RootedValue wrappedVal(aCx);
+ rv = nsContentUtils::WrapNative(aCx, obj, &wrappedVal);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (!JS_DefineElement(aCx, arrayObj, index, wrappedVal, JSPROP_ENUMERATE)) {
+ NS_WARNING("JS_DefineElement failed!");
+ return NS_ERROR_FAILURE;
+ }
+ }
+
+ if (!JS_FreezeObject(aCx, arrayObj)) {
+ NS_WARNING("JS_FreezeObject failed!");
+ return NS_ERROR_FAILURE;
+ }
+
+ aResultArray.set(arrayObj);
+ return NS_OK;
+}
+
+template <>
+inline nsresult
+nsTArrayToJSArray<nsString>(JSContext* aCx,
+ const nsTArray<nsString>& aSourceArray,
+ JS::MutableHandle<JSObject*> aResultArray)
+{
+ MOZ_ASSERT(aCx);
+
+ JS::Rooted<JSObject*> arrayObj(aCx,
+ JS_NewArrayObject(aCx, aSourceArray.Length()));
+ if (!arrayObj) {
+ NS_WARNING("JS_NewArrayObject failed!");
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ JS::Rooted<JSString*> s(aCx);
+ for (uint32_t index = 0; index < aSourceArray.Length(); index++) {
+ s = JS_NewUCStringCopyN(aCx, aSourceArray[index].BeginReading(),
+ aSourceArray[index].Length());
+
+ if(!s) {
+ NS_WARNING("Memory allocation error!");
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ if (!JS_DefineElement(aCx, arrayObj, index, s, JSPROP_ENUMERATE)) {
+ NS_WARNING("JS_DefineElement failed!");
+ return NS_ERROR_FAILURE;
+ }
+ }
+
+ if (!JS_FreezeObject(aCx, arrayObj)) {
+ NS_WARNING("JS_FreezeObject failed!");
+ return NS_ERROR_FAILURE;
+ }
+
+ aResultArray.set(arrayObj);
+ return NS_OK;
+}
+
+#endif /* __NSTARRAYHELPERS_H__ */