From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/base/InProcessBrowserChildMessageManager.cpp | 294 +++++++++++++++++++++++
 1 file changed, 294 insertions(+)
 create mode 100644 dom/base/InProcessBrowserChildMessageManager.cpp

(limited to 'dom/base/InProcessBrowserChildMessageManager.cpp')

diff --git a/dom/base/InProcessBrowserChildMessageManager.cpp b/dom/base/InProcessBrowserChildMessageManager.cpp
new file mode 100644
index 0000000000..774b2aa1b2
--- /dev/null
+++ b/dom/base/InProcessBrowserChildMessageManager.cpp
@@ -0,0 +1,294 @@
+/* -*- 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 "InProcessBrowserChildMessageManager.h"
+#include "nsContentUtils.h"
+#include "nsDocShell.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsFrameLoader.h"
+#include "nsFrameLoaderOwner.h"
+#include "nsQueryObject.h"
+#include "xpcpublic.h"
+#include "nsIMozBrowserFrame.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/dom/ChromeMessageSender.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/MessageManagerBinding.h"
+#include "mozilla/dom/SameProcessMessageQueue.h"
+#include "mozilla/dom/ScriptLoader.h"
+#include "mozilla/dom/WindowProxyHolder.h"
+#include "mozilla/dom/JSActorService.h"
+#include "mozilla/HoldDropJSObjects.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::dom::ipc;
+
+/* static */
+already_AddRefed<InProcessBrowserChildMessageManager>
+InProcessBrowserChildMessageManager::Create(nsDocShell* aShell,
+                                            nsIContent* aOwner,
+                                            nsFrameMessageManager* aChrome) {
+  RefPtr<InProcessBrowserChildMessageManager> mm =
+      new InProcessBrowserChildMessageManager(aShell, aOwner, aChrome);
+
+  NS_ENSURE_TRUE(mm->Init(), nullptr);
+
+  if (XRE_IsParentProcess()) {
+    RefPtr<JSActorService> wasvc = JSActorService::GetSingleton();
+    wasvc->RegisterChromeEventTarget(mm);
+  }
+
+  return mm.forget();
+}
+
+bool InProcessBrowserChildMessageManager::DoSendBlockingMessage(
+    const nsAString& aMessage, StructuredCloneData& aData,
+    nsTArray<StructuredCloneData>* aRetVal) {
+  SameProcessMessageQueue* queue = SameProcessMessageQueue::Get();
+  queue->Flush();
+
+  if (mChromeMessageManager) {
+    RefPtr<nsFrameMessageManager> mm = mChromeMessageManager;
+    RefPtr<nsFrameLoader> fl = GetFrameLoader();
+    mm->ReceiveMessage(mOwner, fl, aMessage, true, &aData, aRetVal,
+                       IgnoreErrors());
+  }
+  return true;
+}
+
+class nsAsyncMessageToParent : public nsSameProcessAsyncMessageBase,
+                               public SameProcessMessageQueue::Runnable {
+ public:
+  explicit nsAsyncMessageToParent(
+      InProcessBrowserChildMessageManager* aBrowserChild)
+      : nsSameProcessAsyncMessageBase(), mBrowserChild(aBrowserChild) {}
+
+  virtual nsresult HandleMessage() override {
+    RefPtr<nsFrameLoader> fl = mBrowserChild->GetFrameLoader();
+    ReceiveMessage(mBrowserChild->mOwner, fl,
+                   mBrowserChild->mChromeMessageManager);
+    return NS_OK;
+  }
+  RefPtr<InProcessBrowserChildMessageManager> mBrowserChild;
+};
+
+nsresult InProcessBrowserChildMessageManager::DoSendAsyncMessage(
+    const nsAString& aMessage, StructuredCloneData& aData) {
+  SameProcessMessageQueue* queue = SameProcessMessageQueue::Get();
+  RefPtr<nsAsyncMessageToParent> ev = new nsAsyncMessageToParent(this);
+
+  nsresult rv = ev->Init(aMessage, aData);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  queue->Push(ev);
+  return NS_OK;
+}
+
+InProcessBrowserChildMessageManager::InProcessBrowserChildMessageManager(
+    nsDocShell* aShell, nsIContent* aOwner, nsFrameMessageManager* aChrome)
+    : ContentFrameMessageManager(new nsFrameMessageManager(this)),
+      mDocShell(aShell),
+      mLoadingScript(false),
+      mPreventEventsEscaping(false),
+      mOwner(aOwner),
+      mChromeMessageManager(aChrome) {
+  mozilla::HoldJSObjects(this);
+
+  // If owner corresponds to an <iframe mozbrowser>, we'll have to tweak our
+  // GetEventTargetParent implementation.
+  nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(mOwner);
+  if (browserFrame) {
+    mIsBrowserFrame = browserFrame->GetReallyIsBrowser();
+  } else {
+    mIsBrowserFrame = false;
+  }
+}
+
+InProcessBrowserChildMessageManager::~InProcessBrowserChildMessageManager() {
+  if (XRE_IsParentProcess()) {
+    JSActorService::UnregisterChromeEventTarget(this);
+  }
+
+  mozilla::DropJSObjects(this);
+}
+
+// This method isn't automatically forwarded safely because it's notxpcom, so
+// the IDL binding doesn't know what value to return.
+void InProcessBrowserChildMessageManager::MarkForCC() {
+  MarkScopesForCC();
+  MessageManagerGlobal::MarkForCC();
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(InProcessBrowserChildMessageManager)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(
+    InProcessBrowserChildMessageManager, DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMessageManager)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocShell)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(
+    InProcessBrowserChildMessageManager, DOMEventTargetHelper)
+  tmp->nsMessageManagerScriptExecutor::Trace(aCallbacks, aClosure);
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(
+    InProcessBrowserChildMessageManager, DOMEventTargetHelper)
+  if (XRE_IsParentProcess()) {
+    JSActorService::UnregisterChromeEventTarget(tmp);
+  }
+
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mMessageManager)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocShell)
+  tmp->nsMessageManagerScriptExecutor::Unlink();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InProcessBrowserChildMessageManager)
+  NS_INTERFACE_MAP_ENTRY(nsIMessageSender)
+  NS_INTERFACE_MAP_ENTRY(nsIInProcessContentFrameMessageManager)
+  NS_INTERFACE_MAP_ENTRY_CONCRETE(ContentFrameMessageManager)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_ADDREF_INHERITED(InProcessBrowserChildMessageManager,
+                         DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(InProcessBrowserChildMessageManager,
+                          DOMEventTargetHelper)
+
+JSObject* InProcessBrowserChildMessageManager::WrapObject(
+    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return ContentFrameMessageManager_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void InProcessBrowserChildMessageManager::CacheFrameLoader(
+    nsFrameLoader* aFrameLoader) {
+  mFrameLoader = aFrameLoader;
+}
+
+Nullable<WindowProxyHolder> InProcessBrowserChildMessageManager::GetContent(
+    ErrorResult& aError) {
+  if (!mDocShell) {
+    return nullptr;
+  }
+  return WindowProxyHolder(mDocShell->GetBrowsingContext());
+}
+
+already_AddRefed<nsIEventTarget>
+InProcessBrowserChildMessageManager::GetTabEventTarget() {
+  nsCOMPtr<nsIEventTarget> target = GetMainThreadSerialEventTarget();
+  return target.forget();
+}
+
+void InProcessBrowserChildMessageManager::FireUnloadEvent() {
+  // We're called from Document::MaybeInitializeFinalizeFrameLoaders, so it
+  // should be safe to run script.
+  MOZ_ASSERT(nsContentUtils::IsSafeToRunScript());
+
+  // Don't let the unload event propagate to chrome event handlers.
+  mPreventEventsEscaping = true;
+  DOMEventTargetHelper::DispatchTrustedEvent(u"unload"_ns);
+
+  // Allow events fired during docshell destruction (pagehide, unload) to
+  // propagate to the <browser> element since chrome code depends on this.
+  mPreventEventsEscaping = false;
+}
+
+void InProcessBrowserChildMessageManager::DisconnectEventListeners() {
+  if (mDocShell) {
+    if (nsCOMPtr<nsPIDOMWindowOuter> win = mDocShell->GetWindow()) {
+      win->SetChromeEventHandler(win->GetChromeEventHandler());
+    }
+  }
+  if (mListenerManager) {
+    mListenerManager->Disconnect();
+  }
+
+  mDocShell = nullptr;
+}
+
+void InProcessBrowserChildMessageManager::Disconnect() {
+  mChromeMessageManager = nullptr;
+  mOwner = nullptr;
+  if (mMessageManager) {
+    static_cast<nsFrameMessageManager*>(mMessageManager.get())->Disconnect();
+    mMessageManager = nullptr;
+  }
+}
+
+NS_IMETHODIMP_(nsIContent*)
+InProcessBrowserChildMessageManager::GetOwnerContent() { return mOwner; }
+
+void InProcessBrowserChildMessageManager::GetEventTargetParent(
+    EventChainPreVisitor& aVisitor) {
+  aVisitor.mForceContentDispatch = true;
+  aVisitor.mCanHandle = true;
+
+  if (mPreventEventsEscaping) {
+    aVisitor.SetParentTarget(nullptr, false);
+    return;
+  }
+
+  if (mIsBrowserFrame &&
+      (!mOwner || !nsContentUtils::IsInChromeDocshell(mOwner->OwnerDoc()))) {
+    if (mOwner) {
+      if (nsPIDOMWindowInner* innerWindow =
+              mOwner->OwnerDoc()->GetInnerWindow()) {
+        // 'this' is already a "chrome handler", so we consider window's
+        // parent target to be part of that same part of the event path.
+        aVisitor.SetParentTarget(innerWindow->GetParentTarget(), false);
+      }
+    }
+  } else {
+    aVisitor.SetParentTarget(mOwner, false);
+  }
+}
+
+class nsAsyncScriptLoad : public Runnable {
+ public:
+  nsAsyncScriptLoad(InProcessBrowserChildMessageManager* aBrowserChild,
+                    const nsAString& aURL, bool aRunInGlobalScope)
+      : mozilla::Runnable("nsAsyncScriptLoad"),
+        mBrowserChild(aBrowserChild),
+        mURL(aURL),
+        mRunInGlobalScope(aRunInGlobalScope) {}
+
+  NS_IMETHOD Run() override {
+    mBrowserChild->LoadFrameScript(mURL, mRunInGlobalScope);
+    return NS_OK;
+  }
+  RefPtr<InProcessBrowserChildMessageManager> mBrowserChild;
+  nsString mURL;
+  bool mRunInGlobalScope;
+};
+
+void InProcessBrowserChildMessageManager::LoadFrameScript(
+    const nsAString& aURL, bool aRunInGlobalScope) {
+  if (!nsContentUtils::IsSafeToRunScript()) {
+    nsContentUtils::AddScriptRunner(
+        new nsAsyncScriptLoad(this, aURL, aRunInGlobalScope));
+    return;
+  }
+  bool tmp = mLoadingScript;
+  mLoadingScript = true;
+  JS::Rooted<JSObject*> mm(mozilla::dom::RootingCx(), GetOrCreateWrapper());
+  LoadScriptInternal(mm, aURL, !aRunInGlobalScope);
+  mLoadingScript = tmp;
+}
+
+already_AddRefed<nsFrameLoader>
+InProcessBrowserChildMessageManager::GetFrameLoader() {
+  RefPtr<nsFrameLoaderOwner> owner = do_QueryObject(mOwner);
+  RefPtr<nsFrameLoader> fl = owner ? owner->GetFrameLoader() : nullptr;
+  if (!fl) {
+    fl = mFrameLoader;
+  }
+  return fl.forget();
+}
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