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// Copyright (c) 2012 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.
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
class PrintPreviewDataStore;
namespace base {
template <typename T>
struct DefaultSingletonTraits;
class RefCountedBytes;
// PrintPreviewDataService manages data stores for chrome://print requests.
// It owns the data store object and is responsible for freeing it.
class PrintPreviewDataService {
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(int32_t preview_ui_id,
int index,
scoped_refptr<base::RefCountedBytes>* data) const;
// 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(int32_t preview_ui_id,
int index,
scoped_refptr<base::RefCountedBytes> data);
// Remove the corresponding PrintPreviewUI entry from the map.
void RemoveEntry(int32_t preview_ui_id);
// Returns the available draft page count.
int GetAvailableDraftPageCount(int32_t preview_ui_id) const;
friend struct base::DefaultSingletonTraits<PrintPreviewDataService>;
// 1:1 relationship between PrintPreviewUI and data store object.
// Key: PrintPreviewUI ID.
// Value: Print preview data store object.
using PreviewDataStoreMap =
std::map<int32_t, std::unique_ptr<PrintPreviewDataStore>>;
PreviewDataStoreMap data_store_map_;