/* -*- 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/.

 */

#pragma once

#include <vector>

#include <memory>

#include "drawdoc.hxx"

class SdrObject;

class SdrPage;

namespace sd

{

/**

 * Interface for the visitor class, which handles each visited SdrObject

 * in the DOM.

 */

class ModelTraverseHandler

{

public:

    virtual ~ModelTraverseHandler() {}

    virtual void handleSdrObject(SdrObject* pObject) = 0;

};

/** Options to change how the traverser is traversing the tree, what is included and what not */

struct TraverserOptions

{

    bool mbMasterPages = false;

};

/**

 * Traverses the DOM and calls a handler for each object (SdrObject) it

 * encounters.

 */

class ModelTraverser

{

private:

    std::vector<std::shared_ptr<ModelTraverseHandler>> m_pNodeHandler;

    SdDrawDocument* m_pDocument;

    TraverserOptions m_aTraverserOptions;

    void traverseObjects(SdrPage const& rPage);

    void traversePages();

    void traverseMasterPages();

public:

    ModelTraverser(SdDrawDocument* pDocument, TraverserOptions const& rTraverserOptions)

        : m_pDocument(pDocument)

        , m_aTraverserOptions(rTraverserOptions)

    {

    }

    void traverse();

    void addNodeHandler(std::shared_ptr<ModelTraverseHandler> pHandler);

};

} // end sd namespace

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