| // 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. |
| |
| #ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_ |
| #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_DATA_SERVICE_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/memory/ref_counted.h" |
| |
| template<typename T> struct DefaultSingletonTraits; |
| |
| class PrintPreviewDataStore; |
| |
| namespace base { |
| 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(int32 preview_ui_id, int index, |
| scoped_refptr<base::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(int32 preview_ui_id, int index, |
| const base::RefCountedBytes* data); |
| |
| // Remove the corresponding PrintPreviewUI entry from the map. |
| void RemoveEntry(int32 preview_ui_id); |
| |
| // Returns the available draft page count. |
| int GetAvailableDraftPageCount(int32 preview_ui_id); |
| |
| private: |
| friend struct DefaultSingletonTraits<PrintPreviewDataService>; |
| |
| // 1:1 relationship between PrintPreviewUI and data store object. |
| // Key: PrintPreviewUI ID. |
| // Value: Print preview data store object. |
| typedef std::map<int32, 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_ |