Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/dom/clients/manager/ClientSourceOpChild.cpp b/dom/clients/manager/ClientSourceOpChild.cpp
new file mode 100644
index 0000000000..01176d7dca
--- /dev/null
+++ b/dom/clients/manager/ClientSourceOpChild.cpp
@@ -0,0 +1,136 @@
+/* -*- 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 "ClientSourceOpChild.h"
+
+#include "ClientSource.h"
+#include "ClientSourceChild.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Unused.h"
+
+namespace mozilla::dom {
+
+ClientSource* ClientSourceOpChild::GetSource() const {
+  auto actor = static_cast<ClientSourceChild*>(Manager());
+  return actor->GetSource();
+}
+
+template <typename Method, typename... Args>
+void ClientSourceOpChild::DoSourceOp(Method aMethod, Args&&... aArgs) {
+  RefPtr<ClientOpPromise> promise;
+  nsCOMPtr<nsISerialEventTarget> target;
+
+  // Some ClientSource operations can cause the ClientSource to be destroyed.
+  // This means we should reference the ClientSource pointer for the minimum
+  // possible to start the operation.  Use an extra block scope here to help
+  // enforce this and prevent accidental usage later in the method.
+  {
+    ClientSource* source = GetSource();
+    if (!source) {
+      CopyableErrorResult rv;
+      rv.ThrowAbortError("Unknown Client");
+      Unused << PClientSourceOpChild::Send__delete__(this, rv);
+      return;
+    }
+
+    target = source->EventTarget();
+
+    // This may cause the ClientSource object to be destroyed.  Do not
+    // use the source variable after this call.
+    promise = (source->*aMethod)(std::forward<Args>(aArgs)...);
+  }
+
+  // The ClientSource methods are required to always return a promise.  If
+  // they encounter an error they should just immediately resolve or reject
+  // the promise as appropriate.
+  MOZ_DIAGNOSTIC_ASSERT(promise);
+
+  // Capture 'this' is safe here because we disconnect the promise
+  // ActorDestroy() which ensures neither lambda is called if the
+  // actor is destroyed before the source operation completes.
+  //
+  // Also capture the promise to ensure it lives until we get a reaction
+  // or the actor starts shutting down and we disconnect our Thenable.
+  // If the ClientSource is doing something async it may throw away the
+  // promise on its side if the global is closed.
+  promise
+      ->Then(
+          target, __func__,
+          [this, promise](const mozilla::dom::ClientOpResult& aResult) {
+            mPromiseRequestHolder.Complete();
+            Unused << PClientSourceOpChild::Send__delete__(this, aResult);
+          },
+          [this, promise](const CopyableErrorResult& aRv) {
+            mPromiseRequestHolder.Complete();
+            Unused << PClientSourceOpChild::Send__delete__(this, aRv);
+          })
+      ->Track(mPromiseRequestHolder);
+}
+
+void ClientSourceOpChild::ActorDestroy(ActorDestroyReason aReason) {
+  Cleanup();
+}
+
+void ClientSourceOpChild::Init(const ClientOpConstructorArgs& aArgs) {
+  switch (aArgs.type()) {
+    case ClientOpConstructorArgs::TClientControlledArgs: {
+      DoSourceOp(&ClientSource::Control, aArgs.get_ClientControlledArgs());
+      break;
+    }
+    case ClientOpConstructorArgs::TClientFocusArgs: {
+      DoSourceOp(&ClientSource::Focus, aArgs.get_ClientFocusArgs());
+      break;
+    }
+    case ClientOpConstructorArgs::TClientPostMessageArgs: {
+      DoSourceOp(&ClientSource::PostMessage, aArgs.get_ClientPostMessageArgs());
+      break;
+    }
+    case ClientOpConstructorArgs::TClientClaimArgs: {
+      MOZ_ASSERT_UNREACHABLE("shouldn't happen with parent intercept");
+      break;
+    }
+    case ClientOpConstructorArgs::TClientGetInfoAndStateArgs: {
+      DoSourceOp(&ClientSource::GetInfoAndState,
+                 aArgs.get_ClientGetInfoAndStateArgs());
+      break;
+    }
+    case ClientOpConstructorArgs::TClientEvictBFCacheArgs: {
+      DoSourceOp(&ClientSource::EvictFromBFCacheOp);
+      break;
+    }
+    default: {
+      MOZ_ASSERT_UNREACHABLE("unknown client operation!");
+      break;
+    }
+  }
+
+  mInitialized.Flip();
+
+  if (mDeletionRequested) {
+    Cleanup();
+    delete this;
+  }
+}
+
+void ClientSourceOpChild::ScheduleDeletion() {
+  if (mInitialized) {
+    Cleanup();
+    delete this;
+    return;
+  }
+
+  mDeletionRequested.Flip();
+}
+
+ClientSourceOpChild::~ClientSourceOpChild() {
+  MOZ_DIAGNOSTIC_ASSERT(mInitialized);
+}
+
+void ClientSourceOpChild::Cleanup() {
+  mPromiseRequestHolder.DisconnectIfExists();
+}
+
+}  // namespace mozilla::dom