1 files changed, 157 insertions, 0 deletions
diff --git a/dom/file/FileBlobImpl.h b/dom/file/FileBlobImpl.h
new file mode 100644
index 0000000000..84565dbd4b
--- /dev/null
+++ b/dom/file/FileBlobImpl.h
@@ -0,0 +1,157 @@
+/* -*- 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_FileBlobImpl_h
+#define mozilla_dom_FileBlobImpl_h
+
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/BlobImpl.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Mutex.h"
+#include "nsCOMPtr.h"
+
+class nsIFile;
+
+namespace mozilla::dom {
+
+class FileBlobImpl : public BlobImpl {
+ public:
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(FileBlobImpl, BlobImpl)
+
+  // Create as a file
+  explicit FileBlobImpl(nsIFile* aFile);
+
+  // Create as a file
+  FileBlobImpl(const nsAString& aName, const nsAString& aContentType,
+               uint64_t aLength, nsIFile* aFile);
+
+  FileBlobImpl(const nsAString& aName, const nsAString& aContentType,
+               uint64_t aLength, nsIFile* aFile, int64_t aLastModificationDate);
+
+  // Create as a file with custom name
+  FileBlobImpl(nsIFile* aFile, const nsAString& aName,
+               const nsAString& aContentType);
+
+  void GetName(nsAString& aName) const override {
+    MOZ_ASSERT(mIsFile, "Should only be called on files");
+    aName = mName;
+  }
+
+  void SetName(const nsAString& aName) { mName = aName; }
+
+  void GetDOMPath(nsAString& aPath) const override {
+    MOZ_ASSERT(mIsFile, "Should only be called on files");
+    aPath = mPath;
+  }
+
+  void SetDOMPath(const nsAString& aPath) override {
+    MOZ_ASSERT(mIsFile, "Should only be called on files");
+    mPath = aPath;
+  }
+
+  int64_t GetLastModified(ErrorResult& aRv) override;
+
+  void GetMozFullPath(nsAString& aFileName, SystemCallerGuarantee /* unused */,
+                      ErrorResult& aRv) override {
+    MOZ_ASSERT(mIsFile, "Should only be called on files");
+
+    GetMozFullPathInternal(aFileName, aRv);
+  }
+
+  void GetMozFullPathInternal(nsAString& aFilename, ErrorResult& aRv) override;
+
+  uint64_t GetSize(ErrorResult& aRv) override;
+
+  void GetType(nsAString& aType) override;
+
+  void GetBlobImplType(nsAString& aBlobImplType) const override;
+
+  size_t GetAllocationSize() const override { return 0; }
+
+  size_t GetAllocationSize(
+      FallibleTArray<BlobImpl*>& aVisitedBlobImpls) const override {
+    return GetAllocationSize();
+  }
+
+  uint64_t GetSerialNumber() const override { return mSerialNumber; }
+
+  const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const override {
+    return nullptr;
+  }
+
+  void CreateInputStream(nsIInputStream** aStream,
+                         ErrorResult& aRv) const override;
+
+  int64_t GetFileId() const override { return mFileId; }
+
+  void SetLazyData(const nsAString& aName, const nsAString& aContentType,
+                   uint64_t aLength, int64_t aLastModifiedDate) override {
+    mName = aName;
+    mContentType = aContentType;
+    mIsFile = !aName.IsVoid();
+    mLength.emplace(aLength);
+    mLastModified.emplace(aLastModifiedDate);
+  }
+
+  bool IsMemoryFile() const override { return false; }
+
+  bool IsFile() const override { return mIsFile; }
+
+  bool IsDirectory() const override;
+
+  void SetType(const nsAString& aType) { mContentType = aType; }
+
+  void SetFileId(int64_t aFileId) { mFileId = aFileId; }
+
+  void SetEmptySize() { mLength.emplace(0); }
+
+  void SetMozFullPath(const nsAString& aPath) { mMozFullPath = aPath; }
+
+  void SetLastModified(int64_t aLastModified) {
+    mLastModified.emplace(aLastModified);
+  }
+
+ protected:
+  ~FileBlobImpl() override = default;
+
+  // Create slice
+  FileBlobImpl(const FileBlobImpl* aOther, uint64_t aStart, uint64_t aLength,
+               const nsAString& aContentType);
+
+  already_AddRefed<BlobImpl> CreateSlice(uint64_t aStart, uint64_t aLength,
+                                         const nsAString& aContentType,
+                                         ErrorResult& aRv) const override;
+
+  class GetTypeRunnable;
+  void GetTypeInternal(nsAString& aType, const MutexAutoLock& aProofOfLock);
+
+  // FileBlobImpl has getter methods with lazy initialization. Because any
+  // BlobImpl must work thread-safe, we use a mutex.
+  Mutex mMutex MOZ_UNANNOTATED;
+
+  nsCOMPtr<nsIFile> mFile;
+
+  nsString mContentType;
+  nsString mName;
+  nsString mPath;  // The path relative to a directory chosen by the user
+  nsString mMozFullPath;
+
+  const uint64_t mSerialNumber;
+  uint64_t mStart;
+
+  int64_t mFileId;
+
+  Maybe<uint64_t> mLength;
+
+  Maybe<int64_t> mLastModified;
+
+  bool mIsFile;
+  bool mWholeFile;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_FileBlobImpl_h