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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"
template<typename T> struct DefaultSingletonTraits;
class PrintPreviewDataStore;
class RefCountedBytes;
// PrintPreviewDataService manages data stores for chrome://print requests.
// It owns the data store object and is responsible for freeing it.
class PrintPreviewDataService {
public:
static PrintPreviewDataService* GetInstance();
// Get the data entry from PrintPreviewDataStore. |index| is zero-based or
// |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to represent complete preview
// data. Use |index| to retrieve a specific preview page data. |data| is set
// to NULL if the requested page is not yet available.
void GetDataEntry(const std::string& preview_ui_addr_str, int index,
scoped_refptr<RefCountedBytes>* data);
// Set/Update the data entry in PrintPreviewDataStore. |index| is zero-based
// or |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to represent complete
// preview data. Use |index| to set/update a specific preview page data.
// NOTE: PrintPreviewDataStore owns the data. Do not refcount |data| before
// calling this function. It will be refcounted in PrintPreviewDataStore.
void SetDataEntry(const std::string& preview_ui_addr_str, int index,
const RefCountedBytes* data);
// Remove the corresponding PrintPreviewUI entry from the map.
void RemoveEntry(const std::string& preview_ui_addr_str);
// Returns the available draft page count.
int GetAvailableDraftPageCount(const std::string& preview_ui_addr_str);
private:
friend struct DefaultSingletonTraits<PrintPreviewDataService>;
// 1:1 relationship between PrintPreviewUI and data store object.
// Key: Print preview UI address string.
// Value: Print preview data store object.
typedef std::map<std::string, scoped_refptr<PrintPreviewDataStore> >
PreviewDataStoreMap;
PrintPreviewDataService();
virtual ~PrintPreviewDataService();
PreviewDataStoreMap data_store_map_;
DISALLOW_COPY_AND_ASSIGN(PrintPreviewDataService);
};
#endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_
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