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content / browser / file_system_access / file_system_access_file_delegate_host_impl.h [blame]
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_FILE_DELEGATE_HOST_IMPL_H_
#define CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_FILE_DELEGATE_HOST_IMPL_H_
#include "base/memory/raw_ptr.h"
#include "base/thread_annotations.h"
#include "components/services/storage/public/cpp/big_io_buffer.h"
#include "content/browser/file_system_access/file_system_access_manager_impl.h"
#include "storage/browser/file_system/file_stream_reader.h"
#include "storage/browser/file_system/file_system_url.h"
#include "third_party/blink/public/mojom/file_system_access/file_system_access_file_delegate_host.mojom.h"
namespace content {
// Browser side implementation of the FileSystemAccessFileDelegateHost mojom
// interface, which facilitates file operations for Access Handles in incognito
// mode. Instances of this class are owned by the
// FileSystemAccessAccessHandleHostImpl instance of the associated URL, which
// constructs it.
class FileSystemAccessFileDelegateHostImpl
: public blink::mojom::FileSystemAccessFileDelegateHost {
public:
FileSystemAccessFileDelegateHostImpl(
FileSystemAccessManagerImpl* manager,
const storage::FileSystemURL& url,
base::PassKey<FileSystemAccessAccessHandleHostImpl> pass_key,
mojo::PendingReceiver<blink::mojom::FileSystemAccessFileDelegateHost>
receiver);
~FileSystemAccessFileDelegateHostImpl() override;
// blink::mojom::FileSystemAccessFileDelegateHost:
void Read(int64_t offset, int bytes_to_read, ReadCallback callback) override;
void Write(int64_t offset,
mojo::ScopedDataPipeConsumerHandle data,
WriteCallback callback) override;
void GetLength(GetLengthCallback callback) override;
void SetLength(int64_t length, SetLengthCallback callback) override;
private:
// State that is kept for the duration of a write operation, to keep track of
// progress until the write completes.
struct WriteState;
void OnDisconnect();
FileSystemAccessManagerImpl* manager() { return manager_; }
storage::FileSystemContext* file_system_context() {
return manager()->context();
}
const storage::FileSystemURL& url() { return url_; }
void DidRead(scoped_refptr<storage::BigIOBuffer> buffer,
ReadCallback callback,
int rv);
void DidWrite(WriteState* state,
base::File::Error result,
int64_t bytes,
bool complete);
// This is safe, since the manager owns the
// FileSystemAccessAccessHandleHostImpl which owns this class.
const raw_ptr<FileSystemAccessManagerImpl> manager_ = nullptr;
const storage::FileSystemURL url_;
mojo::Receiver<blink::mojom::FileSystemAccessFileDelegateHost> receiver_
GUARDED_BY_CONTEXT(sequence_checker_);
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<FileSystemAccessFileDelegateHostImpl> weak_factory_
GUARDED_BY_CONTEXT(sequence_checker_){this};
};
} // namespace content
#endif // CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_FILE_DELEGATE_HOST_IMPL_H_