1 files changed, 153 insertions, 0 deletions
diff --git a/dom/events/DataTransferItem.h b/dom/events/DataTransferItem.h
new file mode 100644
index 000000000..ccd4bafa1
--- /dev/null
+++ b/dom/events/DataTransferItem.h
@@ -0,0 +1,153 @@
+/* -*- 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 mozilla_dom_DataTransferItem_h
+#define mozilla_dom_DataTransferItem_h
+
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/DataTransfer.h"
+#include "mozilla/dom/DOMString.h"
+#include "mozilla/dom/File.h"
+
+namespace mozilla {
+namespace dom {
+
+class FileSystemEntry;
+class FunctionStringCallback;
+
+class DataTransferItem final : public nsISupports
+                             , public nsWrapperCache
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DataTransferItem);
+
+public:
+  // The spec only talks about the "file" and "string" kinds. Due to the Moz*
+  // APIs, it is possible to attach any type to a DataTransferItem, meaning that
+  // we can have other kinds then just FILE and STRING. These others are simply
+  // marked as "other" and can only be produced throug the Moz* APIs.
+  enum eKind {
+    KIND_FILE,
+    KIND_STRING,
+    KIND_OTHER,
+  };
+
+  DataTransferItem(DataTransfer* aDataTransfer, const nsAString& aType,
+                   eKind aKind = KIND_OTHER)
+    : mIndex(0)
+    , mChromeOnly(false)
+    , mKind(aKind)
+    , mType(aType)
+    , mDataTransfer(aDataTransfer)
+  {
+    MOZ_ASSERT(mDataTransfer, "Must be associated with a DataTransfer");
+  }
+
+  already_AddRefed<DataTransferItem> Clone(DataTransfer* aDataTransfer) const;
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  void GetAsString(FunctionStringCallback* aCallback,
+                   nsIPrincipal& aSubjectPrincipal,
+                   ErrorResult& aRv);
+
+  void GetKind(nsAString& aKind) const
+  {
+    switch (mKind) {
+    case KIND_FILE:
+      aKind = NS_LITERAL_STRING("file");
+      return;
+    case KIND_STRING:
+      aKind = NS_LITERAL_STRING("string");
+      return;
+    default:
+      aKind = NS_LITERAL_STRING("other");
+      return;
+    }
+  }
+
+  void GetInternalType(nsAString& aType) const
+  {
+    aType = mType;
+  }
+
+  void GetType(nsAString& aType);
+
+  eKind Kind() const
+  {
+    return mKind;
+  }
+
+  already_AddRefed<File>
+  GetAsFile(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv);
+
+  already_AddRefed<FileSystemEntry>
+  GetAsEntry(nsIPrincipal& aSubjectPrincipal, ErrorResult& aRv);
+
+  DataTransfer* GetParentObject() const
+  {
+    return mDataTransfer;
+  }
+
+  nsIPrincipal* Principal() const
+  {
+    return mPrincipal;
+  }
+  void SetPrincipal(nsIPrincipal* aPrincipal)
+  {
+    mPrincipal = aPrincipal;
+  }
+
+  already_AddRefed<nsIVariant> DataNoSecurityCheck();
+  already_AddRefed<nsIVariant> Data(nsIPrincipal* aPrincipal, ErrorResult& aRv);
+
+  // Note: This can modify the mKind.  Callers of this method must let the
+  // relevant DataTransfer know, because its types list can change as a result.
+  void SetData(nsIVariant* aData);
+
+  uint32_t Index() const
+  {
+    return mIndex;
+  }
+  void SetIndex(uint32_t aIndex)
+  {
+    mIndex = aIndex;
+  }
+  void FillInExternalData();
+
+  bool ChromeOnly() const
+  {
+    return mChromeOnly;
+  }
+  void SetChromeOnly(bool aChromeOnly)
+  {
+    mChromeOnly = aChromeOnly;
+  }
+
+  static eKind KindFromData(nsIVariant* aData);
+
+private:
+  ~DataTransferItem() {}
+  already_AddRefed<File> CreateFileFromInputStream(nsIInputStream* aStream);
+
+  // The index in the 2d mIndexedItems array
+  uint32_t mIndex;
+
+  bool mChromeOnly;
+  eKind mKind;
+  const nsString mType;
+  nsCOMPtr<nsIVariant> mData;
+  nsCOMPtr<nsIPrincipal> mPrincipal;
+  RefPtr<DataTransfer> mDataTransfer;
+
+  // File cache for nsIFile application/x-moz-file entries.
+  RefPtr<File> mCachedFile;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_DataTransferItem_h */