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Diffstat (limited to 'include/oox/helper/storagebase.hxx')
| -rw-r--r-- | include/oox/helper/storagebase.hxx | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/include/oox/helper/storagebase.hxx b/include/oox/helper/storagebase.hxx new file mode 100644 index 000000000..2722ed80b --- /dev/null +++ b/include/oox/helper/storagebase.hxx @@ -0,0 +1,192 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_OOX_HELPER_STORAGEBASE_HXX +#define INCLUDED_OOX_HELPER_STORAGEBASE_HXX + +#include <functional> +#include <memory> +#include <vector> + +#include <com/sun/star/uno/Reference.hxx> +#include <oox/dllapi.h> +#include <oox/helper/refmap.hxx> +#include <rtl/ustring.hxx> + +namespace com::sun::star { + namespace embed { class XStorage; } + namespace io { class XInputStream; } + namespace io { class XOutputStream; } + namespace io { class XStream; } +} + +namespace oox { + + +class StorageBase; +typedef std::shared_ptr< StorageBase > StorageRef; + +/** Base class for storage access implementations. + + Derived classes will be used to encapsulate storage access implementations + for ZIP storages containing XML streams, and OLE storages containing binary + data streams. + */ +class OOX_DLLPUBLIC StorageBase +{ +public: + explicit StorageBase( + const css::uno::Reference< css::io::XInputStream >& rxInStream, + bool bBaseStreamAccess ); + + explicit StorageBase( + const css::uno::Reference< css::io::XStream >& rxOutStream, + bool bBaseStreamAccess ); + + virtual ~StorageBase(); + + /** Returns true, if the object represents a valid storage. */ + bool isStorage() const; + + /** Returns true, if the object represents the root storage. */ + bool isRootStorage() const; + + /** Returns true, if the storage operates in read-only mode (based on an + input stream). */ + bool isReadOnly() const { return mbReadOnly;} + + /** Returns the com.sun.star.embed.XStorage interface of the current storage. */ + css::uno::Reference< css::embed::XStorage > + getXStorage() const; + + /** Returns the element name of this storage. */ + const OUString& getName() const { return maStorageName;} + + /** Returns the full path of this storage. */ + OUString getPath() const; + + /** Fills the passed vector with the names of all direct elements of this + storage. */ + void getElementNames( ::std::vector< OUString >& orElementNames ) const; + + /** Opens and returns the specified sub storage from the storage. + + @param rStorageName + The name of the embedded storage. The name may contain slashes to + open storages from embedded substorages. + @param bCreateMissing + True = create missing sub storages (for export filters). Must be + false for storages based on input streams. + */ + StorageRef openSubStorage( const OUString& rStorageName, bool bCreateMissing ); + + /** Opens and returns the specified input stream from the storage. + + @param rStreamName + The name of the embedded storage stream. The name may contain + slashes to open streams from embedded substorages. If base stream + access has been enabled in the constructor, the base stream can be + accessed by passing an empty string as stream name. + */ + css::uno::Reference< css::io::XInputStream > + openInputStream( const OUString& rStreamName ); + + /** Opens and returns the specified output stream from the storage. + + @param rStreamName + The name of the embedded storage stream. The name may contain + slashes to create and open streams in embedded substorages. If base + stream access has been enabled in the constructor, the base stream + can be accessed by passing an empty string as stream name. + */ + css::uno::Reference< css::io::XOutputStream > + openOutputStream( const OUString& rStreamName ); + + /** Copies the specified element from this storage to the passed + destination storage. + + @param rElementName + The name of the embedded storage or stream. The name may contain + slashes to specify an element in an embedded substorage. In this + case, the element will be copied to the same substorage in the + destination storage. + */ + void copyToStorage( StorageBase& rDestStrg, const OUString& rElementName ); + + /** Copies all streams of this storage and of all substorages to the passed + destination. */ + void copyStorageToStorage( StorageBase& rDestStrg ); + + /** Commits the changes to the storage and all substorages. */ + void commit(); + +protected: + /** Special constructor for sub storage objects. */ + explicit StorageBase( const StorageBase& rParentStorage, const OUString& rStorageName, bool bReadOnly ); + +private: + StorageBase( const StorageBase& ) = delete; + StorageBase& operator=( const StorageBase& ) = delete; + + /** Returns true, if the object represents a valid storage. */ + virtual bool implIsStorage() const = 0; + + /** Returns the com.sun.star.embed.XStorage interface of the current storage. */ + virtual css::uno::Reference< css::embed::XStorage > + implGetXStorage() const = 0; + + /** Returns the names of all elements of this storage. */ + virtual void implGetElementNames( ::std::vector< OUString >& orElementNames ) const = 0; + + /** Implementation of opening a storage element. */ + virtual StorageRef implOpenSubStorage( const OUString& rElementName, bool bCreate ) = 0; + + /** Implementation of opening an input stream element. */ + virtual css::uno::Reference< css::io::XInputStream > + implOpenInputStream( const OUString& rElementName ) = 0; + + /** Implementation of opening an output stream element. */ + virtual css::uno::Reference< css::io::XOutputStream > + implOpenOutputStream( const OUString& rElementName ) = 0; + + /** Commits the current storage. */ + virtual void implCommit() const = 0; + + /** Helper that opens and caches the specified direct substorage. */ + StorageRef getSubStorage( const OUString& rElementName, bool bCreateMissing ); + +private: + RefMap< OUString, StorageBase > + maSubStorages; ///< Map of direct sub storages. + css::uno::Reference< css::io::XInputStream > + mxInStream; ///< Cached base input stream (to keep it alive). + css::uno::Reference< css::io::XStream > + mxOutStream; ///< Cached base output stream (to keep it alive). + OUString maParentPath; ///< Full path of parent storage. + OUString maStorageName; ///< Name of this storage, if it is a substorage. + bool mbBaseStreamAccess; ///< True = access base streams with empty stream name. + bool mbReadOnly; ///< True = storage opened read-only (based on input stream). +}; + + +} // namespace oox + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |