1 files changed, 89 insertions, 0 deletions
diff --git a/widget/nsTransferable.h b/widget/nsTransferable.h
new file mode 100644
index 0000000000..0529bf713b
--- /dev/null
+++ b/widget/nsTransferable.h
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef nsTransferable_h__
+#define nsTransferable_h__
+
+#include "nsICookieJarSettings.h"
+#include "nsIFormatConverter.h"
+#include "nsITransferable.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "nsIPrincipal.h"
+#include "prio.h"
+#include "mozilla/Maybe.h"
+
+class nsIMutableArray;
+
+//
+// DataStruct
+//
+// Holds a flavor (a mime type) that describes the data and the associated data.
+//
+struct DataStruct {
+  explicit DataStruct(const char* aFlavor)
+      : mCacheFD(nullptr), mFlavor(aFlavor) {}
+  DataStruct(DataStruct&& aRHS);
+  ~DataStruct();
+
+  const nsCString& GetFlavor() const { return mFlavor; }
+  void SetData(nsISupports* aData, bool aIsPrivateData);
+  void GetData(nsISupports** aData);
+  bool IsDataAvailable() const { return mData || mCacheFD; }
+
+ protected:
+  enum {
+    // The size of data over which we write the data to disk rather than
+    // keep it around in memory.
+    kLargeDatasetSize = 1000000  // 1 million bytes
+  };
+
+  nsresult WriteCache(void* aData, uint32_t aDataLen);
+  nsresult ReadCache(nsISupports** aData);
+
+  // mData OR mCacheFD should be used, not both.
+  nsCOMPtr<nsISupports> mData;  // OWNER - some varient of primitive wrapper
+  PRFileDesc* mCacheFD;
+  const nsCString mFlavor;
+
+ private:
+  DataStruct(const DataStruct&) = delete;
+  DataStruct& operator=(const DataStruct&) = delete;
+};
+
+/**
+ * XP Transferable wrapper
+ */
+
+class nsTransferable : public nsITransferable {
+ public:
+  nsTransferable();
+
+  // nsISupports
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITRANSFERABLE
+
+ protected:
+  virtual ~nsTransferable();
+
+  // Get flavors w/out converter
+  void GetTransferDataFlavors(nsTArray<nsCString>& aFlavors);
+
+  // Find index for data with the matching flavor in mDataArray.
+  mozilla::Maybe<size_t> FindDataFlavor(const char* aFlavor);
+
+  nsTArray<DataStruct> mDataArray;
+  nsCOMPtr<nsIFormatConverter> mFormatConv;
+  bool mPrivateData;
+  nsCOMPtr<nsIPrincipal> mRequestingPrincipal;
+  nsContentPolicyType mContentPolicyType;
+  nsCOMPtr<nsICookieJarSettings> mCookieJarSettings;
+#if DEBUG
+  bool mInitialized;
+#endif
+};
+
+#endif  // nsTransferable_h__