dom/file/StringBlobImpl.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "StringBlobImpl.h"
   8 #include "nsStringStream.h"
   9
  10 namespace mozilla::dom {
  11
  12 NS_IMPL_ISUPPORTS_INHERITED(StringBlobImpl, BlobImpl, nsIMemoryReporter)
  13
  14 /* static */
  15 already_AddRefed<StringBlobImpl> StringBlobImpl::Create(
  16     const nsACString& aData, const nsAString& aContentType) {
  17   RefPtr<StringBlobImpl> blobImpl = new StringBlobImpl(aData, aContentType);
  18   RegisterWeakMemoryReporter(blobImpl);
  19   return blobImpl.forget();
  20 }
  21
  22 StringBlobImpl::StringBlobImpl(const nsACString& aData,
  23                                const nsAString& aContentType)
  24     : BaseBlobImpl(aContentType, aData.Length()), mData(aData) {}
  25
  26 StringBlobImpl::~StringBlobImpl() { UnregisterWeakMemoryReporter(this); }
  27
  28 already_AddRefed<BlobImpl> StringBlobImpl::CreateSlice(
  29     uint64_t aStart, uint64_t aLength, const nsAString& aContentType,
  30     ErrorResult& aRv) const {
  31   RefPtr<BlobImpl> impl =
  32       new StringBlobImpl(Substring(mData, aStart, aLength), aContentType);
  33   return impl.forget();
  34 }
  35
  36 void StringBlobImpl::CreateInputStream(nsIInputStream** aStream,
  37                                        ErrorResult& aRv) const {
  38   aRv = NS_NewCStringInputStream(aStream, mData);
  39 }
  40
  41 NS_IMETHODIMP
  42 StringBlobImpl::CollectReports(nsIHandleReportCallback* aHandleReport,
  43                                nsISupports* aData, bool aAnonymize) {
  44   MOZ_COLLECT_REPORT("explicit/dom/memory-file-data/string", KIND_HEAP,
  45                      UNITS_BYTES,
  46                      mData.SizeOfExcludingThisIfUnshared(MallocSizeOf),
  47                      "Memory used to back a File/Blob based on a string.");
  48   return NS_OK;
  49 }
  50
  51 }  // namespace mozilla::dom