/* -*- 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_SFX2_METADATABLE_HXX

#define INCLUDED_SFX2_METADATABLE_HXX

#include <sal/config.h>

#include <sfx2/dllapi.h>

#include <cppuhelper/implbase.hxx>

#include <com/sun/star/rdf/XMetadatable.hpp>

#include <memory>

namespace com::sun::star {

    namespace frame { class XModel; }

}

namespace sfx2 {

    class IXmlIdRegistry;

}

namespace sfx2 {

class XmlIdRegistry;

class MetadatableUndo;

// XML ID handling ---------------------------------------------------

/// create a sfx2::XmlIdRegistryDocument or a sfx2::XmlIdRegistryClipboard

SFX2_DLLPUBLIC ::sfx2::IXmlIdRegistry *

createXmlIdRegistry(const bool i_DocIsClipboard);

/** base class for core objects that may have xml:id.

    <p>The interface of this class consists of 3 parts:

    <ul><li>implementations that are used by the MetadatableMixin

            below</li>

        <li>hooks to be called by the sw core whenever actions that are

            relevant to the uniqueness of xml:ids are taken (copying,

            splitting, merging, deletion, undo, etc.)</li>

        <li>abstract methods that are called by the implementation of the

            previous hooks</li></ul>

    </p>

 */

class SFX2_DLLPUBLIC SAL_LOPLUGIN_ANNOTATE("crosscast") Metadatable

{

public:

    Metadatable() : m_pReg(nullptr) {}

    // destructor calls RemoveMetadataReference

    virtual ~Metadatable();

    // for MetadatableMixin ----------------------------------------------

    css::beans::StringPair GetMetadataReference() const;

    void SetMetadataReference( const css::beans::StringPair & i_rReference);

    void EnsureMetadataReference();

    // hooks -------------------------------------------------------------

    // called from dtor!

    void RemoveMetadataReference();

    /** register this as a copy of i_rSource */

    void RegisterAsCopyOf(Metadatable const & i_rSource,

        const bool i_bCopyPrecedesSource = false);

    /** create an Undo Metadatable, which remembers this' reference */

    std::shared_ptr<MetadatableUndo> CreateUndo() const;

    std::shared_ptr<MetadatableUndo> CreateUndoForDelete();

    /** restore this from Undo Metadatable */

    void RestoreMetadata(std::shared_ptr<MetadatableUndo> const& i_pUndo);

    /** merge this and i_rOther into this */

    void JoinMetadatable(Metadatable const & i_rOther,

        const bool i_isMergedEmpty, const bool i_isOtherEmpty);

    // abstract methods --------------------------------------------------

    /** get the registry from the SwDoc */

    virtual ::sfx2::IXmlIdRegistry& GetRegistry() = 0;

    /** is this in a clipboard document? */

    virtual bool IsInClipboard() const = 0;

    /** is this in undo array? */

    virtual bool IsInUndo() const = 0;

    /** which stream is this in? true: content.xml; false: styles.xml */

    virtual bool IsInContent() const = 0;

    /** create XMetadatable from this.

        note: if IsInUndo or IsInClipboard return true,

        MakeUnoObject <em>must not</em> be called!

     */

    virtual css::uno::Reference< css::rdf::XMetadatable > MakeUnoObject() = 0;

private:

    Metadatable(const Metadatable&) = delete;

    Metadatable& operator=(const Metadatable&) = delete;

    friend class MetadatableClipboard;

    friend class MetadatableUndo;

    // note that Reg may be a XmlIdRegistryDocument or a XmlIdRegistryClipboard

    XmlIdRegistry* m_pReg; // null => no XmlId

};

/** base class for UNO objects that implement XMetadatable.

    <p>An instance of this base class is associated with an instance of

       Metadatable.</p>

 */

class SFX2_DLLPUBLIC MetadatableMixin :

    public cppu::WeakImplHelper<css::rdf::XMetadatable>

{

public:

    MetadatableMixin() {};

    // css::rdf::XNode:

    virtual OUString SAL_CALL getStringValue() override;

    // css::rdf::XURI:

    virtual OUString SAL_CALL getLocalName() override;

    virtual OUString SAL_CALL getNamespace() override;

    // css::rdf::XMetadatable:

    virtual css::beans::StringPair SAL_CALL getMetadataReference() override;

    virtual void SAL_CALL setMetadataReference(

        const css::beans::StringPair & i_rReference) override;

    virtual void SAL_CALL ensureMetadataReference() override;

protected:

    /// get the core object corresponding to this UNO object.

    virtual Metadatable * GetCoreObject() = 0;

    /// get the XModel for the document

    virtual css::uno::Reference< css::frame::XModel >

        GetModel() = 0;

};

} // namespace sfx2

#endif // INCLUDED_SFX2_METADATABLE_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */