1 files changed, 81 insertions, 0 deletions
diff --git a/dom/events/RemoteDragStartData.cpp b/dom/events/RemoteDragStartData.cpp
new file mode 100644
index 0000000000..9b713ec60e
--- /dev/null
+++ b/dom/events/RemoteDragStartData.cpp
@@ -0,0 +1,81 @@
+/* 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 "nsContentAreaDragDrop.h"
+#include "RemoteDragStartData.h"
+#include "nsContentUtils.h"
+#include "nsICookieJarSettings.h"
+#include "nsVariant.h"
+#include "mozilla/dom/BlobImpl.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/IPCBlobUtils.h"
+#include "mozilla/dom/DOMTypes.h"
+#include "mozilla/ipc/ProtocolUtils.h"
+
+using namespace mozilla::ipc;
+
+namespace mozilla::dom {
+
+RemoteDragStartData::~RemoteDragStartData() = default;
+
+RemoteDragStartData::RemoteDragStartData(
+    BrowserParent* aBrowserParent, nsTArray<IPCDataTransfer>&& aDataTransfer,
+    const LayoutDeviceIntRect& aRect, nsIPrincipal* aPrincipal,
+    nsIContentSecurityPolicy* aCsp, nsICookieJarSettings* aCookieJarSettings,
+    WindowContext* aSourceWindowContext)
+    : mBrowserParent(aBrowserParent),
+      mDataTransfer(std::move(aDataTransfer)),
+      mRect(aRect),
+      mPrincipal(aPrincipal),
+      mCsp(aCsp),
+      mCookieJarSettings(aCookieJarSettings),
+      mSourceWindowContext(aSourceWindowContext) {}
+
+void RemoteDragStartData::AddInitialDnDDataTo(
+    DataTransfer* aDataTransfer, nsIPrincipal** aPrincipal,
+    nsIContentSecurityPolicy** aCsp,
+    nsICookieJarSettings** aCookieJarSettings) {
+  NS_IF_ADDREF(*aPrincipal = mPrincipal);
+  NS_IF_ADDREF(*aCsp = mCsp);
+  NS_IF_ADDREF(*aCookieJarSettings = mCookieJarSettings);
+
+  for (uint32_t i = 0; i < mDataTransfer.Length(); ++i) {
+    nsTArray<IPCDataTransferItem>& itemArray = mDataTransfer[i].items();
+    for (auto& item : itemArray) {
+      if (!nsContentUtils::IPCDataTransferItemHasKnownFlavor(item)) {
+        NS_WARNING(
+            "Ignoring unknown flavor in "
+            "RemoteDragStartData::AddInitialDnDDataTo");
+        continue;
+      }
+
+      RefPtr<nsVariantCC> variant = new nsVariantCC();
+      // Special case kFilePromiseMime so that we get the right
+      // nsIFlavorDataProvider for it.
+      if (item.flavor().EqualsLiteral(kFilePromiseMime)) {
+        RefPtr<nsISupports> flavorDataProvider =
+            new nsContentAreaDragDropDataProvider();
+        variant->SetAsISupports(flavorDataProvider);
+      } else {
+        nsresult rv =
+            nsContentUtils::IPCTransferableItemToVariant(item, variant);
+        if (NS_FAILED(rv)) {
+          continue;
+        }
+      }
+
+      // We set aHidden to false, as we don't need to worry about hiding data
+      // from content in the parent process where there is no content.
+      aDataTransfer->SetDataWithPrincipalFromOtherProcess(
+          NS_ConvertUTF8toUTF16(item.flavor()), variant, i, mPrincipal,
+          /* aHidden = */ false);
+    }
+  }
+
+  // Clear things that are no longer needed.
+  mDataTransfer.Clear();
+  mPrincipal = nullptr;
+}
+
+}  // namespace mozilla::dom