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// Copyright 2010 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PDF_LOADER_DOCUMENT_LOADER_H_
#define PDF_LOADER_DOCUMENT_LOADER_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/containers/span.h"
namespace chrome_pdf {
class URLLoaderWrapper;
class DocumentLoader {
public:
class Client {
public:
virtual ~Client() = default;
// Creates new URLLoader based on client settings.
virtual std::unique_ptr<URLLoaderWrapper> CreateURLLoader() = 0;
// Notification called when all outstanding pending requests are complete.
virtual void OnPendingRequestComplete() = 0;
// Notification called when new data is available.
virtual void OnNewDataReceived() = 0;
// Notification called when document is fully loaded.
virtual void OnDocumentComplete() = 0;
// Notification called when document loading is canceled.
virtual void OnDocumentCanceled() = 0;
};
virtual ~DocumentLoader() = default;
virtual bool Init(std::unique_ptr<URLLoaderWrapper> loader,
const std::string& url) = 0;
// Data access interface for writing the data at offset `position` into `buf`.
// Return true if successful.
virtual bool GetBlock(uint32_t position, base::span<uint8_t> buf) const = 0;
// Data availability interface. Return true if data is available.
virtual bool IsDataAvailable(uint32_t position, uint32_t size) const = 0;
// Data request interface.
virtual void RequestData(uint32_t position, uint32_t size) = 0;
virtual bool IsDocumentComplete() const = 0;
virtual uint32_t GetDocumentSize() const = 0;
virtual uint32_t BytesReceived() const = 0;
// Clear pending requests from the queue.
virtual void ClearPendingRequests() = 0;
};
} // namespace chrome_pdf
#endif // PDF_LOADER_DOCUMENT_LOADER_H_
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