| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_ |
| #define CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/files/file.h" |
| #include "content/common/content_export.h" |
| #include "third_party/WebKit/public/platform/WebFileWriter.h" |
| #include "url/gurl.h" |
| |
| namespace blink { |
| class WebFileWriterClient; |
| } |
| |
| namespace content { |
| |
| class CONTENT_EXPORT WebFileWriterBase |
| : public NON_EXPORTED_BASE(blink::WebFileWriter) { |
| public: |
| WebFileWriterBase(const GURL& path, blink::WebFileWriterClient* client); |
| ~WebFileWriterBase() override; |
| |
| // WebFileWriter implementation |
| void truncate(long long length) override; |
| void write(long long position, const blink::WebString& id) override; |
| void cancel() override; |
| |
| protected: |
| // This calls DidSucceed() or DidFail() based on the value of |error_code|. |
| void DidFinish(base::File::Error error_code); |
| |
| void DidWrite(int64_t bytes, bool complete); |
| void DidSucceed(); |
| void DidFail(base::File::Error error_code); |
| |
| // Derived classes must provide these methods to asynchronously perform |
| // the requested operation, and they must call the appropiate DidSomething |
| // method upon completion and as progress is made in the Write case. |
| virtual void DoTruncate(const GURL& path, int64_t offset) = 0; |
| virtual void DoWrite(const GURL& path, |
| const std::string& blob_id, |
| int64_t offset) = 0; |
| virtual void DoCancel() = 0; |
| |
| private: |
| enum OperationType { |
| kOperationNone, |
| kOperationWrite, |
| kOperationTruncate |
| }; |
| |
| enum CancelState { |
| kCancelNotInProgress, |
| kCancelSent, |
| kCancelReceivedWriteResponse, |
| }; |
| |
| void FinishCancel(); |
| |
| GURL path_; |
| blink::WebFileWriterClient* client_; |
| OperationType operation_; |
| CancelState cancel_state_; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_CHILD_FILEAPI_WEBFILEWRITER_BASE_H_ |