1 files changed, 158 insertions, 0 deletions
diff --git a/dom/file/BaseBlobImpl.h b/dom/file/BaseBlobImpl.h
new file mode 100644
index 0000000000..7265fc2104
--- /dev/null
+++ b/dom/file/BaseBlobImpl.h
@@ -0,0 +1,158 @@
+/* -*- 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_BaseBlobImpl_h
+#define mozilla_dom_BaseBlobImpl_h
+
+#include "nsIGlobalObject.h"
+#include "mozilla/dom/BlobImpl.h"
+#include "mozilla/ErrorResult.h"
+
+namespace mozilla::dom {
+
+class FileBlobImpl;
+
+class BaseBlobImpl : public BlobImpl {
+  friend class FileBlobImpl;
+
+ public:
+  // File constructor.
+  BaseBlobImpl(const nsAString& aName, const nsAString& aContentType,
+               uint64_t aLength, int64_t aLastModifiedDate)
+      : mIsFile(true),
+        mContentType(aContentType),
+        mName(aName),
+        mStart(0),
+        mLength(aLength),
+        mSerialNumber(NextSerialNumber()),
+        mLastModificationDate(aLastModifiedDate) {
+    // Ensure non-null mContentType by default
+    mContentType.SetIsVoid(false);
+  }
+
+  // Blob constructor without starting point.
+  BaseBlobImpl(const nsAString& aContentType, uint64_t aLength)
+      : mIsFile(false),
+        mContentType(aContentType),
+        mStart(0),
+        mLength(aLength),
+        mSerialNumber(NextSerialNumber()),
+        mLastModificationDate(0) {
+    // Ensure non-null mContentType by default
+    mContentType.SetIsVoid(false);
+  }
+
+  // Blob constructor with starting point.
+  BaseBlobImpl(const nsAString& aContentType, uint64_t aStart, uint64_t aLength)
+      : mIsFile(false),
+        mContentType(aContentType),
+        mStart(aStart),
+        mLength(aLength),
+        mSerialNumber(NextSerialNumber()),
+        mLastModificationDate(0) {
+    // Ensure non-null mContentType by default
+    mContentType.SetIsVoid(false);
+  }
+
+  void GetName(nsAString& aName) const override;
+
+  void GetDOMPath(nsAString& aPath) const override;
+
+  void SetDOMPath(const nsAString& aPath) override;
+
+  int64_t GetLastModified(ErrorResult& aRv) override;
+
+  void GetMozFullPath(nsAString& aFileName, SystemCallerGuarantee /* unused */,
+                      ErrorResult& aRv) override;
+
+  void GetMozFullPathInternal(nsAString& aFileName, ErrorResult& aRv) override;
+
+  uint64_t GetSize(ErrorResult& aRv) override { return mLength; }
+
+  void GetType(nsAString& aType) 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; }
+
+  already_AddRefed<BlobImpl> CreateSlice(uint64_t aStart, uint64_t aLength,
+                                         const nsAString& aContentType,
+                                         ErrorResult& aRv) const override {
+    return nullptr;
+  }
+
+  const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const override {
+    return nullptr;
+  }
+
+  void CreateInputStream(nsIInputStream** aStream,
+                         ErrorResult& aRv) const override {
+    aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+  }
+
+  int64_t GetFileId() const override;
+
+  void SetLazyData(const nsAString& aName, const nsAString& aContentType,
+                   uint64_t aLength, int64_t aLastModifiedDate) override {
+    mName = aName;
+    mContentType = aContentType;
+    mLength = aLength;
+    SetLastModificationDatePrecisely(aLastModifiedDate);
+    mIsFile = !aName.IsVoid();
+  }
+
+  bool IsMemoryFile() const override { return false; }
+
+  bool IsFile() const override { return mIsFile; }
+
+  void GetBlobImplType(nsAString& aBlobImplType) const override {
+    aBlobImplType = u"BaseBlobImpl"_ns;
+  }
+
+ protected:
+  ~BaseBlobImpl() override = default;
+
+  /**
+   * Returns a new, effectively-unique serial number. This should be used
+   * by implementations to obtain a serial number for GetSerialNumber().
+   * The implementation is thread safe.
+   */
+  static uint64_t NextSerialNumber();
+
+  void SetLastModificationDate(RTPCallerType aRTPCallerType, int64_t aDate);
+  void SetLastModificationDatePrecisely(int64_t aDate);
+
+#ifdef DEBUG
+  bool IsLastModificationDateUnset() const {
+    return mLastModificationDate == INT64_MAX;
+  }
+#endif
+
+  const nsString mBlobImplType;
+
+  bool mIsFile;
+
+  nsString mContentType;
+  nsString mName;
+  nsString mPath;  // The path relative to a directory chosen by the user
+
+  uint64_t mStart;
+  uint64_t mLength;
+
+  const uint64_t mSerialNumber;
+
+ private:
+  int64_t mLastModificationDate;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_BaseBlobImpl_h