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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 "FileSystemRootDirectoryReader.h"
#include "CallbackRunnables.h"
#include "nsIGlobalObject.h"
namespace mozilla {
namespace dom {
namespace {
class EntriesCallbackRunnable final : public Runnable
{
public:
EntriesCallbackRunnable(FileSystemEntriesCallback* aCallback,
const Sequence<RefPtr<FileSystemEntry>>& aEntries)
: mCallback(aCallback)
, mEntries(aEntries)
{
MOZ_ASSERT(aCallback);
}
NS_IMETHOD
Run() override
{
Sequence<OwningNonNull<FileSystemEntry>> entries;
for (uint32_t i = 0; i < mEntries.Length(); ++i) {
if (!entries.AppendElement(mEntries[i].forget(), fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
mCallback->HandleEvent(entries);
return NS_OK;
}
private:
RefPtr<FileSystemEntriesCallback> mCallback;
Sequence<RefPtr<FileSystemEntry>> mEntries;
};
} // anonymous namespace
NS_IMPL_CYCLE_COLLECTION_INHERITED(FileSystemRootDirectoryReader,
FileSystemDirectoryReader, mEntries)
NS_IMPL_ADDREF_INHERITED(FileSystemRootDirectoryReader,
FileSystemDirectoryReader)
NS_IMPL_RELEASE_INHERITED(FileSystemRootDirectoryReader,
FileSystemDirectoryReader)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileSystemRootDirectoryReader)
NS_INTERFACE_MAP_END_INHERITING(FileSystemDirectoryReader)
FileSystemRootDirectoryReader::FileSystemRootDirectoryReader(FileSystemDirectoryEntry* aParentEntry,
FileSystem* aFileSystem,
const Sequence<RefPtr<FileSystemEntry>>& aEntries)
: FileSystemDirectoryReader(aParentEntry, aFileSystem, nullptr)
, mEntries(aEntries)
, mAlreadyRead(false)
{
MOZ_ASSERT(aParentEntry);
MOZ_ASSERT(aFileSystem);
}
FileSystemRootDirectoryReader::~FileSystemRootDirectoryReader()
{}
void
FileSystemRootDirectoryReader::ReadEntries(FileSystemEntriesCallback& aSuccessCallback,
const Optional<OwningNonNull<ErrorCallback>>& aErrorCallback,
ErrorResult& aRv)
{
if (mAlreadyRead) {
RefPtr<EmptyEntriesCallbackRunnable> runnable =
new EmptyEntriesCallbackRunnable(&aSuccessCallback);
aRv = NS_DispatchToMainThread(runnable);
NS_WARNING_ASSERTION(!aRv.Failed(), "NS_DispatchToMainThread failed");
return;
}
// This object can be used only once.
mAlreadyRead = true;
RefPtr<EntriesCallbackRunnable> runnable =
new EntriesCallbackRunnable(&aSuccessCallback, mEntries);
aRv = NS_DispatchToMainThread(runnable);
NS_WARNING_ASSERTION(!aRv.Failed(), "NS_DispatchToMainThread failed");
}
} // dom namespace
} // mozilla namespace
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