1 files changed, 129 insertions, 0 deletions
diff --git a/dom/permission/PermissionStatus.cpp b/dom/permission/PermissionStatus.cpp
new file mode 100644
index 000000000..680ece1d0
--- /dev/null
+++ b/dom/permission/PermissionStatus.cpp
@@ -0,0 +1,129 @@
+/* -*- 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 "mozilla/dom/PermissionStatus.h"
+
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/Services.h"
+#include "nsIPermissionManager.h"
+#include "PermissionObserver.h"
+#include "PermissionUtils.h"
+
+namespace mozilla {
+namespace dom {
+
+/* static */ already_AddRefed<PermissionStatus>
+PermissionStatus::Create(nsPIDOMWindowInner* aWindow,
+                         PermissionName aName,
+                         ErrorResult& aRv)
+{
+  RefPtr<PermissionStatus> status = new PermissionStatus(aWindow, aName);
+  aRv = status->Init();
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  return status.forget();
+}
+
+PermissionStatus::PermissionStatus(nsPIDOMWindowInner* aWindow,
+                                   PermissionName aName)
+  : DOMEventTargetHelper(aWindow)
+  , mName(aName)
+  , mState(PermissionState::Denied)
+{
+}
+
+nsresult
+PermissionStatus::Init()
+{
+  mObserver = PermissionObserver::GetInstance();
+  if (NS_WARN_IF(!mObserver)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mObserver->AddSink(this);
+
+  nsresult rv = UpdateState();
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+PermissionStatus::~PermissionStatus()
+{
+  if (mObserver) {
+    mObserver->RemoveSink(this);
+  }
+}
+
+JSObject*
+PermissionStatus::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return PermissionStatusBinding::Wrap(aCx, this, aGivenProto);
+}
+
+nsresult
+PermissionStatus::UpdateState()
+{
+  nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
+  if (NS_WARN_IF(!permMgr)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
+  if (NS_WARN_IF(!window)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uint32_t action = nsIPermissionManager::DENY_ACTION;
+  nsresult rv = permMgr->TestPermissionFromWindow(window,
+                                                  PermissionNameToType(mName),
+                                                  &action);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  mState = ActionToPermissionState(action);
+  return NS_OK;
+}
+
+already_AddRefed<nsIPrincipal>
+PermissionStatus::GetPrincipal() const
+{
+  nsCOMPtr<nsPIDOMWindowInner> window = GetOwner();
+  if (NS_WARN_IF(!window)) {
+    return nullptr;
+  }
+
+  nsIDocument* doc = window->GetExtantDoc();
+  if (NS_WARN_IF(!doc)) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIPrincipal> principal =
+    mozilla::BasePrincipal::Cast(doc->NodePrincipal())->CloneStrippingUserContextIdAndFirstPartyDomain();
+  NS_ENSURE_TRUE(principal, nullptr);
+
+  return principal.forget();
+}
+
+void
+PermissionStatus::PermissionChanged()
+{
+  auto oldState = mState;
+  UpdateState();
+  if (mState != oldState) {
+    RefPtr<AsyncEventDispatcher> eventDispatcher =
+      new AsyncEventDispatcher(this, NS_LITERAL_STRING("change"), false);
+    eventDispatcher->PostDOMEvent();
+  }
+}
+
+} // namespace dom
+} // namespace mozilla