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-rw-r--r--dom/base/nsIGlobalObject.cpp113
1 files changed, 113 insertions, 0 deletions
diff --git a/dom/base/nsIGlobalObject.cpp b/dom/base/nsIGlobalObject.cpp
new file mode 100644
index 000000000..6479c947b
--- /dev/null
+++ b/dom/base/nsIGlobalObject.cpp
@@ -0,0 +1,113 @@
+/* -*- 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/. */
+
+#include "nsIGlobalObject.h"
+#include "nsContentUtils.h"
+#include "nsThreadUtils.h"
+#include "nsHostObjectProtocolHandler.h"
+
+nsIGlobalObject::~nsIGlobalObject()
+{
+ UnlinkHostObjectURIs();
+}
+
+nsIPrincipal*
+nsIGlobalObject::PrincipalOrNull()
+{
+ JSObject *global = GetGlobalJSObject();
+ if (NS_WARN_IF(!global))
+ return nullptr;
+
+ return nsContentUtils::ObjectPrincipal(global);
+}
+
+void
+nsIGlobalObject::RegisterHostObjectURI(const nsACString& aURI)
+{
+ MOZ_ASSERT(!mHostObjectURIs.Contains(aURI));
+ mHostObjectURIs.AppendElement(aURI);
+}
+
+void
+nsIGlobalObject::UnregisterHostObjectURI(const nsACString& aURI)
+{
+ mHostObjectURIs.RemoveElement(aURI);
+}
+
+namespace {
+
+class UnlinkHostObjectURIsRunnable final : public mozilla::Runnable
+{
+public:
+ explicit UnlinkHostObjectURIsRunnable(nsTArray<nsCString>& aURIs)
+ {
+ mURIs.SwapElements(aURIs);
+ }
+
+ NS_IMETHOD Run() override
+ {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ for (uint32_t index = 0; index < mURIs.Length(); ++index) {
+ nsHostObjectProtocolHandler::RemoveDataEntry(mURIs[index]);
+ }
+
+ return NS_OK;
+ }
+
+private:
+ ~UnlinkHostObjectURIsRunnable() {}
+
+ nsTArray<nsCString> mURIs;
+};
+
+} // namespace
+
+void
+nsIGlobalObject::UnlinkHostObjectURIs()
+{
+ if (mHostObjectURIs.IsEmpty()) {
+ return;
+ }
+
+ if (NS_IsMainThread()) {
+ for (uint32_t index = 0; index < mHostObjectURIs.Length(); ++index) {
+ nsHostObjectProtocolHandler::RemoveDataEntry(mHostObjectURIs[index]);
+ }
+
+ mHostObjectURIs.Clear();
+ return;
+ }
+
+ // nsHostObjectProtocolHandler is main-thread only.
+
+ RefPtr<UnlinkHostObjectURIsRunnable> runnable =
+ new UnlinkHostObjectURIsRunnable(mHostObjectURIs);
+ MOZ_ASSERT(mHostObjectURIs.IsEmpty());
+
+ nsresult rv = NS_DispatchToMainThread(runnable);
+ if (NS_FAILED(rv)) {
+ NS_WARNING("Failed to dispatch a runnable to the main-thread.");
+ }
+}
+
+void
+nsIGlobalObject::TraverseHostObjectURIs(nsCycleCollectionTraversalCallback &aCb)
+{
+ if (mHostObjectURIs.IsEmpty()) {
+ return;
+ }
+
+ // Currently we only store BlobImpl objects off the the main-thread and they
+ // are not CCed.
+ if (!NS_IsMainThread()) {
+ return;
+ }
+
+ for (uint32_t index = 0; index < mHostObjectURIs.Length(); ++index) {
+ nsHostObjectProtocolHandler::Traverse(mHostObjectURIs[index], aCb);
+ }
+}