include/sfx2/Metadatable.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef INCLUDED_SFX2_METADATABLE_HXX
  20 #define INCLUDED_SFX2_METADATABLE_HXX
  21
  22 #include <sal/config.h>
  23
  24 #include <sfx2/dllapi.h>
  25
  26 #include <cppuhelper/implbase.hxx>
  27 #include <com/sun/star/rdf/XMetadatable.hpp>
  28
  29 #include <memory>
  30
  31
  32 namespace com { namespace sun { namespace star {
  33     namespace frame { class XModel; }
  34 } } }
  35
  36 namespace sfx2 {
  37     class IXmlIdRegistry;
  38 }
  39
  40 namespace sfx2 {
  41
  42 class XmlIdRegistry;
  43 class MetadatableUndo;
  44
  45
  46 // XML ID handling ---------------------------------------------------
  47
  48
  49 /// create a sfx2::XmlIdRegistryDocument or a sfx2::XmlIdRegistryClipboard
  50 SFX2_DLLPUBLIC ::sfx2::IXmlIdRegistry *
  51 createXmlIdRegistry(const bool i_DocIsClipboard);
  52
  53
  54 /** base class for core objects that may have xml:id.
  55
  56     <p>The interface of this class consists of 3 parts:
  57     <ul><li>implementations that are used by the MetadatableMixin
  58             below</li>
  59         <li>hooks to be called by the sw core whenever actions that are
  60             relevant to the uniqueness of xml:ids are taken (copying,
  61             splitting, merging, deletion, undo, etc.)</li>
  62         <li>abstract methods that are called by the implementation of the
  63             previous hooks</li></ul>
  64     </p>
  65  */
  66 class SFX2_DLLPUBLIC Metadatable
  67 {
  68 public:
  69     Metadatable() : m_pReg(nullptr) {}
  70
  71     // destructor calls RemoveMetadataReference
  72     virtual ~Metadatable();
  73
  74     // for MetadatableMixin ----------------------------------------------
  75
  76     css::beans::StringPair GetMetadataReference() const;
  77     void SetMetadataReference( const css::beans::StringPair & i_rReference);
  78     void EnsureMetadataReference();
  79
  80     // hooks -------------------------------------------------------------
  81
  82     // called from dtor!
  83     void RemoveMetadataReference();
  84
  85     /** register this as a copy of i_rSource */
  86     void RegisterAsCopyOf(Metadatable const & i_rSource,
  87         const bool i_bCopyPrecedesSource = false);
  88
  89     /** create an Undo Metadatable, which remembers this' reference */
  90     std::shared_ptr<MetadatableUndo> CreateUndo() const;
  91     std::shared_ptr<MetadatableUndo> CreateUndoForDelete();
  92
  93     /** restore this from Undo Metadatable */
  94     void RestoreMetadata(std::shared_ptr<MetadatableUndo> const& i_pUndo);
  95
  96     /** merge this and i_rOther into this */
  97     void JoinMetadatable(Metadatable const & i_rOther,
  98         const bool i_isMergedEmpty, const bool i_isOtherEmpty);
  99
 100     // abstract methods --------------------------------------------------
 101
 102     /** get the registry from the SwDoc */
 103     virtual ::sfx2::IXmlIdRegistry& GetRegistry() = 0;
 104
 105     /** is this in a clipboard document? */
 106     virtual bool IsInClipboard() const = 0;
 107
 108     /** is this in undo array? */
 109     virtual bool IsInUndo() const = 0;
 110
 111     /** which stream is this in? true: content.xml; false: styles.xml */
 112     virtual bool IsInContent() const = 0;
 113
 114     /** create XMetadatable from this.
 115         note: if IsInUndo or IsInClipboard return true,
 116         MakeUnoObject <em>must not</em> be called!
 117      */
 118     virtual css::uno::Reference< css::rdf::XMetadatable > MakeUnoObject() = 0;
 119
 120 private:
 121     Metadatable(const Metadatable&) = delete;
 122     Metadatable& operator=(const Metadatable&) = delete;
 123
 124     friend class MetadatableClipboard;
 125     friend class MetadatableUndo;
 126
 127     // note that Reg may be a XmlIdRegistryDocument or a XmlIdRegistryClipboard
 128     XmlIdRegistry* m_pReg; // null => no XmlId
 129 };
 130
 131
 132 /** base class for UNO objects that implement XMetadatable.
 133
 134     <p>An instance of this base class is associated with an instance of
 135        Metadatable.</p>
 136  */
 137 class SFX2_DLLPUBLIC MetadatableMixin :
 138     public cppu::WeakImplHelper<css::rdf::XMetadatable>
 139 {
 140
 141 public:
 142     MetadatableMixin() {};
 143
 144     // css::rdf::XNode:
 145     virtual OUString SAL_CALL getStringValue() override;
 146
 147     // css::rdf::XURI:
 148     virtual OUString SAL_CALL getLocalName() override;
 149     virtual OUString SAL_CALL getNamespace() override;
 150
 151     // css::rdf::XMetadatable:
 152     virtual css::beans::StringPair SAL_CALL getMetadataReference() override;
 153     virtual void SAL_CALL setMetadataReference(
 154         const css::beans::StringPair & i_rReference) override;
 155     virtual void SAL_CALL ensureMetadataReference() override;
 156
 157 protected:
 158     /// get the core object corresponding to this UNO object.
 159     virtual Metadatable * GetCoreObject() = 0;
 160     /// get the XModel for the document
 161     virtual css::uno::Reference< css::frame::XModel >
 162         GetModel() = 0;
 163
 164 };
 165
 166 } // namespace sfx2
 167
 168 #endif // INCLUDED_SFX2_METADATABLE_HXX
 169
 170 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */