From 2b41c85019bd5fd7e62556b5d5bf6ace2a6d6963 Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Wed, 10 Jun 2020 21:08:58 +0000
Subject: Issue #1587 - Part 1: Implement FetchController/FetchSignal interface

---
 dom/fetch/FetchController.cpp | 110 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 dom/fetch/FetchController.cpp

(limited to 'dom/fetch/FetchController.cpp')

diff --git a/dom/fetch/FetchController.cpp b/dom/fetch/FetchController.cpp
new file mode 100644
index 000000000..b3d8a4d9c
--- /dev/null
+++ b/dom/fetch/FetchController.cpp
@@ -0,0 +1,110 @@
+/* -*- 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 "FetchController.h"
+#include "FetchSignal.h"
+#include "mozilla/dom/FetchControllerBinding.h"
+#include "WorkerPrivate.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FetchController, mGlobal, mSignal)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(FetchController)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(FetchController)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FetchController)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+/* static */ bool
+FetchController::IsEnabled(JSContext* aCx, JSObject* aGlobal)
+{
+  if (NS_IsMainThread()) {
+    return Preferences::GetBool("dom.fetchController.enabled", false);
+  }
+
+  using namespace workers;
+
+  // Otherwise, check the pref via the WorkerPrivate
+  WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
+  if (!workerPrivate) {
+    return false;
+  }
+
+  return workerPrivate->FetchControllerEnabled();
+}
+
+/* static */ already_AddRefed<FetchController>
+FetchController::Constructor(const GlobalObject& aGlobal, ErrorResult& aRv)
+{
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+  if (!global) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  RefPtr<FetchController> fetchController = new FetchController(global);
+  return fetchController.forget();
+}
+
+FetchController::FetchController(nsIGlobalObject* aGlobal)
+  : mGlobal(aGlobal)
+  , mAborted(false)
+{}
+
+JSObject*
+FetchController::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return FetchControllerBinding::Wrap(aCx, this, aGivenProto);
+}
+
+nsIGlobalObject*
+FetchController::GetParentObject() const
+{
+  return mGlobal;
+}
+
+FetchSignal*
+FetchController::Signal()
+{
+  if (!mSignal) {
+    mSignal = new FetchSignal(this, mAborted);
+  }
+
+  return mSignal;
+}
+
+void
+FetchController::Abort()
+{
+  if (mAborted) {
+    return;
+  }
+
+  mAborted = true;
+
+  if (mSignal) {
+    mSignal->Abort();
+  }
+}
+
+void
+FetchController::Follow(FetchSignal& aSignal)
+{
+  // TODO
+}
+
+void
+FetchController::Unfollow(FetchSignal& aSignal)
+{
+  // TODO
+}
+
+} // dom namespace
+} // mozilla namespace
-- 
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