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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "ArchiveReader.h"
#include "ArchiveRequest.h"
#include "ArchiveEvent.h"
#include "ArchiveZipEvent.h"
#include "nsIURI.h"
#include "nsNetCID.h"
#include "mozilla/dom/ArchiveReaderBinding.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/EncodingUtils.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::dom;
USING_ARCHIVEREADER_NAMESPACE
/* static */ already_AddRefed<ArchiveReader>
ArchiveReader::Constructor(const GlobalObject& aGlobal,
Blob& aBlob,
const ArchiveReaderOptions& aOptions,
ErrorResult& aError)
{
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal.GetAsSupports());
if (!window) {
aError.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsAutoCString encoding;
if (!EncodingUtils::FindEncodingForLabelNoReplacement(aOptions.mEncoding,
encoding)) {
aError.ThrowRangeError<MSG_ENCODING_NOT_SUPPORTED>(aOptions.mEncoding);
return nullptr;
}
RefPtr<ArchiveReader> reader =
new ArchiveReader(aBlob, window, encoding);
return reader.forget();
}
ArchiveReader::ArchiveReader(Blob& aBlob, nsPIDOMWindowInner* aWindow,
const nsACString& aEncoding)
: mBlobImpl(aBlob.Impl())
, mWindow(aWindow)
, mStatus(NOT_STARTED)
, mEncoding(aEncoding)
{
MOZ_ASSERT(aWindow);
}
ArchiveReader::~ArchiveReader()
{
}
/* virtual */ JSObject*
ArchiveReader::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return ArchiveReaderBinding::Wrap(aCx, this, aGivenProto);
}
nsresult
ArchiveReader::RegisterRequest(ArchiveRequest* aRequest)
{
switch (mStatus) {
// Append to the list and let's start to work:
case NOT_STARTED:
mRequests.AppendElement(aRequest);
return OpenArchive();
// Just append to the list:
case WORKING:
mRequests.AppendElement(aRequest);
return NS_OK;
// Return data!
case READY:
RequestReady(aRequest);
return NS_OK;
}
NS_ASSERTION(false, "unexpected mStatus value");
return NS_OK;
}
// This returns the input stream
nsresult
ArchiveReader::GetInputStream(nsIInputStream** aInputStream)
{
// Getting the input stream
ErrorResult rv;
mBlobImpl->GetInternalStream(aInputStream, rv);
if (NS_WARN_IF(rv.Failed())) {
return rv.StealNSResult();
}
return NS_OK;
}
nsresult
ArchiveReader::GetSize(uint64_t* aSize)
{
ErrorResult rv;
*aSize = mBlobImpl->GetSize(rv);
return rv.StealNSResult();
}
// Here we open the archive:
nsresult
ArchiveReader::OpenArchive()
{
mStatus = WORKING;
nsresult rv;
// Target:
nsCOMPtr<nsIEventTarget> target = do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
NS_ASSERTION(target, "Must have stream transport service");
// Here a Event to make everything async:
RefPtr<ArchiveReaderEvent> event;
/* FIXME: If we want to support more than 1 format we should check the content type here: */
event = new ArchiveReaderZipEvent(this, mEncoding);
rv = target->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
// In order to be sure that this object exists when the event finishes its task,
// we increase the refcount here:
AddRef();
return NS_OK;
}
// Data received from the dispatched event:
void
ArchiveReader::Ready(nsTArray<RefPtr<File>>& aFileList,
nsresult aStatus)
{
mStatus = READY;
// Let's store the values:
mData.fileList = aFileList;
mData.status = aStatus;
// Propagate the results:
for (uint32_t index = 0; index < mRequests.Length(); ++index) {
RefPtr<ArchiveRequest> request = mRequests[index];
RequestReady(request);
}
mRequests.Clear();
// The async operation is concluded, we can decrease the reference:
Release();
}
void
ArchiveReader::RequestReady(ArchiveRequest* aRequest)
{
// The request will do the rest:
aRequest->ReaderReady(mData.fileList, mData.status);
}
already_AddRefed<ArchiveRequest>
ArchiveReader::GetFilenames()
{
RefPtr<ArchiveRequest> request = GenerateArchiveRequest();
request->OpGetFilenames();
return request.forget();
}
already_AddRefed<ArchiveRequest>
ArchiveReader::GetFile(const nsAString& filename)
{
RefPtr<ArchiveRequest> request = GenerateArchiveRequest();
request->OpGetFile(filename);
return request.forget();
}
already_AddRefed<ArchiveRequest>
ArchiveReader::GetFiles()
{
RefPtr<ArchiveRequest> request = GenerateArchiveRequest();
request->OpGetFiles();
return request.forget();
}
already_AddRefed<ArchiveRequest>
ArchiveReader::GenerateArchiveRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return ArchiveRequest::Create(mWindow, this);
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ArchiveReader,
mBlobImpl,
mWindow,
mData.fileList,
mRequests)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ArchiveReader)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(ArchiveReader)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ArchiveReader)
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