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// Copyright (c) 2011 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 CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_
#define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_
#pragma once
#include <map>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
template<typename T> struct DefaultSingletonTraits;
// PrintPreviewDataService manages data for chrome://print requests.
//
// PrintPreviewDataService owns the data and is responsible for freeing it when
// either:
// a) There is a new data.
// b) When PrintPreviewDataService is destroyed.
//
class PrintPreviewDataService {
public:
static PrintPreviewDataService* GetInstance();
// Get the data entry from PreviewDataSourceMap.
void GetDataEntry(const std::string& preview_ui_addr_str,
scoped_refptr<RefCountedBytes>* data);
// Set/Update the data entry in PreviewDataSourceMap.
void SetDataEntry(const std::string& preview_ui_addr_str,
const RefCountedBytes* data);
// Remove the corresponding PrintPreviewUI entry from the map.
void RemoveEntry(const std::string& preview_ui_addr_str);
private:
friend struct DefaultSingletonTraits<PrintPreviewDataService>;
// 1:1 relationship between PrintPreviewUI and preview data.
// Key: Print preview UI address string.
// Value: Preview data.
typedef std::map<std::string, scoped_refptr<RefCountedBytes> >
PreviewDataSourceMap;
PrintPreviewDataService();
virtual ~PrintPreviewDataService();
PreviewDataSourceMap data_src_map_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewDataService);
};
#endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_
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