1 files changed, 161 insertions, 0 deletions
diff --git a/dom/file/Blob.h b/dom/file/Blob.h
new file mode 100644
index 0000000000..2314df32b3
--- /dev/null
+++ b/dom/file/Blob.h
@@ -0,0 +1,161 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_Blob_h
+#define mozilla_dom_Blob_h
+
+#include "mozilla/dom/BodyConsumer.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsCOMPtr.h"
+#include "nsWrapperCache.h"
+#include "nsWeakReference.h"
+
+class nsIGlobalObject;
+class nsIInputStream;
+
+namespace mozilla {
+class ErrorResult;
+
+namespace dom {
+
+struct BlobPropertyBag;
+class BlobImpl;
+class File;
+class GlobalObject;
+class OwningArrayBufferViewOrArrayBufferOrBlobOrUTF8String;
+class Promise;
+
+class ReadableStream;
+
+#define NS_DOM_BLOB_IID                              \
+  {                                                  \
+    0x648c2a83, 0xbdb1, 0x4a7d, {                    \
+      0xb5, 0x0a, 0xca, 0xcd, 0x92, 0x87, 0x45, 0xc2 \
+    }                                                \
+  }
+
+class Blob : public nsSupportsWeakReference, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS_FINAL
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Blob)
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOM_BLOB_IID)
+
+  using BlobPart = OwningArrayBufferViewOrArrayBufferOrBlobOrUTF8String;
+
+  // This creates a Blob or a File based on the type of BlobImpl.
+  static Blob* Create(nsIGlobalObject* aGlobal, BlobImpl* aImpl);
+
+  static already_AddRefed<Blob> CreateStringBlob(nsIGlobalObject* aGlobal,
+                                                 const nsACString& aData,
+                                                 const nsAString& aContentType);
+
+  // The returned Blob takes ownership of aMemoryBuffer. aMemoryBuffer will be
+  // freed by free so it must be allocated by malloc or something
+  // compatible with it.
+  static already_AddRefed<Blob> CreateMemoryBlob(nsIGlobalObject* aGlobal,
+                                                 void* aMemoryBuffer,
+                                                 uint64_t aLength,
+                                                 const nsAString& aContentType);
+
+  BlobImpl* Impl() const { return mImpl; }
+
+  bool IsFile() const;
+
+  const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const;
+
+  // This method returns null if this Blob is not a File; it returns
+  // the same object in case this Blob already implements the File interface;
+  // otherwise it returns a new File object with the same BlobImpl.
+  already_AddRefed<File> ToFile();
+
+  // This method creates a new File object with the given name and the same
+  // BlobImpl.
+  already_AddRefed<File> ToFile(const nsAString& aName, ErrorResult& aRv) const;
+
+  already_AddRefed<Blob> CreateSlice(uint64_t aStart, uint64_t aLength,
+                                     const nsAString& aContentType,
+                                     ErrorResult& aRv) const;
+
+  void CreateInputStream(nsIInputStream** aStream, ErrorResult& aRv) const;
+
+  int64_t GetFileId() const;
+
+  // A utility function that enforces the spec constraints on the type of a
+  // blob: no codepoints outside the ASCII range (otherwise type becomes empty)
+  // and lowercase ASCII only.  We can't just use our existing nsContentUtils
+  // ASCII-related helpers because we need the "outside ASCII range" check, and
+  // we can't use NS_IsAscii because its definition of "ASCII" (chars all <=
+  // 0x7E) differs from the file API definition (which excludes control chars).
+  static void MakeValidBlobType(nsAString& aType);
+
+  // WebIDL methods
+  nsIGlobalObject* GetParentObject() const { return mGlobal; }
+
+  bool IsMemoryFile() const;
+
+  // Blob constructor
+  static already_AddRefed<Blob> Constructor(
+      const GlobalObject& aGlobal, const Optional<Sequence<BlobPart>>& aData,
+      const BlobPropertyBag& aBag, ErrorResult& aRv);
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  uint64_t GetSize(ErrorResult& aRv);
+
+  void GetType(nsAString& aType);
+
+  void GetBlobImplType(nsAString& aBlobImplType);
+
+  already_AddRefed<Blob> Slice(const Optional<int64_t>& aStart,
+                               const Optional<int64_t>& aEnd,
+                               const Optional<nsAString>& aContentType,
+                               ErrorResult& aRv);
+
+  size_t GetAllocationSize() const;
+
+  nsresult GetSendInfo(nsIInputStream** aBody, uint64_t* aContentLength,
+                       nsACString& aContentType, nsACString& aCharset) const;
+
+  already_AddRefed<ReadableStream> Stream(JSContext* aCx,
+                                          ErrorResult& aRv) const;
+  already_AddRefed<Promise> Text(ErrorResult& aRv) const;
+  already_AddRefed<Promise> ArrayBuffer(ErrorResult& aRv) const;
+
+ protected:
+  // File constructor should never be used directly. Use Blob::Create instead.
+  Blob(nsIGlobalObject* aGlobal, BlobImpl* aImpl);
+  virtual ~Blob();
+
+  virtual bool HasFileInterface() const { return false; }
+
+  already_AddRefed<Promise> ConsumeBody(BodyConsumer::ConsumeType aConsumeType,
+                                        ErrorResult& aRv) const;
+
+  // The member is the real backend implementation of this File/Blob.
+  // It's thread-safe and not CC-able and it's the only element that is moved
+  // between threads.
+  // Note: we should not store any other state in this class!
+  RefPtr<BlobImpl> mImpl;
+
+ private:
+  nsCOMPtr<nsIGlobalObject> mGlobal;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(Blob, NS_DOM_BLOB_IID)
+
+// Override BindingJSObjectMallocBytes for blobs to tell the JS GC how much
+// memory is held live by the binding object.
+size_t BindingJSObjectMallocBytes(Blob* aBlob);
+
+}  // namespace dom
+}  // namespace mozilla
+
+inline nsISupports* ToSupports(mozilla::dom::Blob* aBlob) {
+  return static_cast<nsISupportsWeakReference*>(aBlob);
+}
+
+#endif  // mozilla_dom_Blob_h