gecko-dev/dom/file/File.cpp

/* -*- 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 "File.h"
#include "FileBlobImpl.h"
#include "MemoryBlobImpl.h"
#include "MultipartBlobImpl.h"
#include "mozilla/dom/BlobBinding.h"
#include "mozilla/dom/FileBinding.h"
#include "mozilla/dom/FileCreatorHelper.h"
#include "mozilla/dom/FileSystemUtils.h"
#include "mozilla/dom/Promise.h"
#include "nsXULAppAPI.h"

namespace mozilla {
namespace dom {

File::File(nsISupports* aParent, BlobImpl* aImpl)
  : Blob(aParent, aImpl)
{
  MOZ_ASSERT(aImpl->IsFile());
}

File::~File()
{}

/* static */ File*
File::Create(nsISupports* aParent, BlobImpl* aImpl)
{
  MOZ_ASSERT(aImpl);
  MOZ_ASSERT(aImpl->IsFile());

  return new File(aParent, aImpl);
}

/* static */ already_AddRefed<File>
File::Create(nsISupports* aParent, const nsAString& aName,
             const nsAString& aContentType, uint64_t aLength,
             int64_t aLastModifiedDate)
{
  RefPtr<File> file = new File(aParent,
    new BaseBlobImpl(aName, aContentType, aLength, aLastModifiedDate));
  return file.forget();
}

/* static */ already_AddRefed<File>
File::CreateMemoryFile(nsISupports* aParent, void* aMemoryBuffer,
                       uint64_t aLength, const nsAString& aName,
                       const nsAString& aContentType,
                       int64_t aLastModifiedDate)
{
  RefPtr<File> file = new File(aParent,
    new MemoryBlobImpl(aMemoryBuffer, aLength, aName,
                       aContentType, aLastModifiedDate));
  return file.forget();
}

/* static */ already_AddRefed<File>
File::CreateFromFile(nsISupports* aParent, nsIFile* aFile)
{
  MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
  RefPtr<File> file = new File(aParent, new FileBlobImpl(aFile));
  return file.forget();
}

/* static */ already_AddRefed<File>
File::CreateFromFile(nsISupports* aParent, nsIFile* aFile,
                     const nsAString& aName, const nsAString& aContentType)
{
  MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
  RefPtr<File> file = new File(aParent,
    new FileBlobImpl(aFile, aName, aContentType));
  return file.forget();
}

JSObject*
File::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return FileBinding::Wrap(aCx, this, aGivenProto);
}

void
File::GetName(nsAString& aFileName) const
{
  mImpl->GetName(aFileName);
}

void
File::GetRelativePath(nsAString& aPath) const
{
  aPath.Truncate();

  nsAutoString path;
  mImpl->GetDOMPath(path);

  // WebkitRelativePath doesn't start with '/'
  if (!path.IsEmpty()) {
    MOZ_ASSERT(path[0] == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR);
    aPath.Assign(Substring(path, 1));
  }
}

Date
File::GetLastModifiedDate(ErrorResult& aRv)
{
  int64_t value = GetLastModified(aRv);
  if (aRv.Failed()) {
    return Date();
  }

  return Date(JS::TimeClip(value));
}

int64_t
File::GetLastModified(ErrorResult& aRv)
{
  return mImpl->GetLastModified(aRv);
}

void
File::GetMozFullPath(nsAString& aFilename, SystemCallerGuarantee aGuarantee,
                     ErrorResult& aRv) const
{
  mImpl->GetMozFullPath(aFilename, aGuarantee, aRv);
}

void
File::GetMozFullPathInternal(nsAString& aFileName, ErrorResult& aRv) const
{
  mImpl->GetMozFullPathInternal(aFileName, aRv);
}

/* static */ already_AddRefed<File>
File::Constructor(const GlobalObject& aGlobal,
                  const Sequence<BlobPart>& aData,
                  const nsAString& aName,
                  const FilePropertyBag& aBag,
                  ErrorResult& aRv)
{
  // Normalizing the filename
  nsString name(aName);
  name.ReplaceChar('/', ':');

  RefPtr<MultipartBlobImpl> impl = new MultipartBlobImpl(name);

  nsAutoString type(aBag.mType);
  MakeValidBlobType(type);
  impl->InitializeBlob(aGlobal.Context(), aData, type, false, aRv);
  if (aRv.Failed()) {
    return nullptr;
  }
  MOZ_ASSERT(impl->IsFile());

  if (aBag.mLastModified.WasPassed()) {
    impl->SetLastModified(aBag.mLastModified.Value());
  }

  RefPtr<File> file = new File(aGlobal.GetAsSupports(), impl);
  return file.forget();
}

/* static */ already_AddRefed<Promise>
File::CreateFromNsIFile(const GlobalObject& aGlobal,
                        nsIFile* aData,
                        const ChromeFilePropertyBag& aBag,
                        SystemCallerGuarantee aGuarantee,
                        ErrorResult& aRv)
{
  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());

  RefPtr<Promise> promise =
    FileCreatorHelper::CreateFile(global, aData, aBag, true, aRv);
  return promise.forget();
}

/* static */ already_AddRefed<Promise>
File::CreateFromFileName(const GlobalObject& aGlobal,
                         const nsAString& aPath,
                         const ChromeFilePropertyBag& aBag,
                         SystemCallerGuarantee aGuarantee,
                         ErrorResult& aRv)
{
  nsCOMPtr<nsIFile> file;
  aRv = NS_NewLocalFile(aPath, false, getter_AddRefs(file));
  if (NS_WARN_IF(aRv.Failed())) {
    return nullptr;
  }

  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());

  RefPtr<Promise> promise =
    FileCreatorHelper::CreateFile(global, file, aBag, false, aRv);
  return promise.forget();
}

} // namespace dom
} // namespace mozilla