1 files changed, 51 insertions, 0 deletions
diff --git a/dom/file/StringBlobImpl.cpp b/dom/file/StringBlobImpl.cpp
new file mode 100644
index 0000000000..8cb657ca5f
--- /dev/null
+++ b/dom/file/StringBlobImpl.cpp
@@ -0,0 +1,51 @@
+/* -*- 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/. */
+
+#include "StringBlobImpl.h"
+#include "nsStringStream.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_ISUPPORTS_INHERITED(StringBlobImpl, BlobImpl, nsIMemoryReporter)
+
+/* static */
+already_AddRefed<StringBlobImpl> StringBlobImpl::Create(
+    const nsACString& aData, const nsAString& aContentType) {
+  RefPtr<StringBlobImpl> blobImpl = new StringBlobImpl(aData, aContentType);
+  RegisterWeakMemoryReporter(blobImpl);
+  return blobImpl.forget();
+}
+
+StringBlobImpl::StringBlobImpl(const nsACString& aData,
+                               const nsAString& aContentType)
+    : BaseBlobImpl(aContentType, aData.Length()), mData(aData) {}
+
+StringBlobImpl::~StringBlobImpl() { UnregisterWeakMemoryReporter(this); }
+
+already_AddRefed<BlobImpl> StringBlobImpl::CreateSlice(
+    uint64_t aStart, uint64_t aLength, const nsAString& aContentType,
+    ErrorResult& aRv) const {
+  RefPtr<BlobImpl> impl =
+      new StringBlobImpl(Substring(mData, aStart, aLength), aContentType);
+  return impl.forget();
+}
+
+void StringBlobImpl::CreateInputStream(nsIInputStream** aStream,
+                                       ErrorResult& aRv) const {
+  aRv = NS_NewCStringInputStream(aStream, mData);
+}
+
+NS_IMETHODIMP
+StringBlobImpl::CollectReports(nsIHandleReportCallback* aHandleReport,
+                               nsISupports* aData, bool aAnonymize) {
+  MOZ_COLLECT_REPORT("explicit/dom/memory-file-data/string", KIND_HEAP,
+                     UNITS_BYTES,
+                     mData.SizeOfExcludingThisIfUnshared(MallocSizeOf),
+                     "Memory used to back a File/Blob based on a string.");
+  return NS_OK;
+}
+
+}  // namespace mozilla::dom