1 files changed, 76 insertions, 0 deletions
diff --git a/dom/webbrowserpersist/WebBrowserPersistResourcesChild.cpp b/dom/webbrowserpersist/WebBrowserPersistResourcesChild.cpp
new file mode 100644
index 0000000000..b77b8fe25a
--- /dev/null
+++ b/dom/webbrowserpersist/WebBrowserPersistResourcesChild.cpp
@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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 "WebBrowserPersistResourcesChild.h"
+
+#include "WebBrowserPersistDocumentChild.h"
+#include "mozilla/dom/PContentChild.h"
+
+namespace mozilla {
+
+NS_IMPL_ISUPPORTS(WebBrowserPersistResourcesChild,
+                  nsIWebBrowserPersistResourceVisitor)
+
+WebBrowserPersistResourcesChild::WebBrowserPersistResourcesChild() = default;
+
+WebBrowserPersistResourcesChild::~WebBrowserPersistResourcesChild() = default;
+
+NS_IMETHODIMP
+WebBrowserPersistResourcesChild::VisitResource(
+    nsIWebBrowserPersistDocument* aDocument, const nsACString& aURI,
+    nsContentPolicyType aContentPolicyType) {
+  nsCString copiedURI(aURI);  // Yay, XPIDL/IPDL mismatch.
+  SendVisitResource(copiedURI, aContentPolicyType);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebBrowserPersistResourcesChild::VisitDocument(
+    nsIWebBrowserPersistDocument* aDocument,
+    nsIWebBrowserPersistDocument* aSubDocument) {
+  auto* subActor = new WebBrowserPersistDocumentChild();
+  // As a consequence of how PWebBrowserPersistDocumentConstructor
+  // can be sent by both the parent and the child, we must pass the
+  // aBrowser and outerWindowID arguments here, but the values are
+  // ignored by the parent.  In particular, the BrowserChild in which
+  // persistence started does not necessarily exist at this point;
+  // see bug 1203602.
+  if (!Manager()->Manager()->SendPWebBrowserPersistDocumentConstructor(
+          subActor, nullptr, nullptr)) {
+    // NOTE: subActor is freed at this point.
+    return NS_ERROR_FAILURE;
+  }
+  // ...but here, IPC won't free subActor until after this returns
+  // to the event loop.
+
+  // The order of these two messages will be preserved, because
+  // they're the same toplevel protocol and priority.
+  //
+  // With this ordering, it's always the transition out of START
+  // state that causes a document's parent actor to be exposed to
+  // XPCOM (for both parent->child and child->parent construction),
+  // which simplifies the lifetime management.
+  SendVisitDocument(subActor);
+  subActor->Start(aSubDocument);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebBrowserPersistResourcesChild::VisitBrowsingContext(
+    nsIWebBrowserPersistDocument* aDocument,
+    dom::BrowsingContext* aBrowsingContext) {
+  SendVisitBrowsingContext(aBrowsingContext);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebBrowserPersistResourcesChild::EndVisit(
+    nsIWebBrowserPersistDocument* aDocument, nsresult aStatus) {
+  Send__delete__(this, aStatus);
+  return NS_OK;
+}
+
+}  // namespace mozilla