/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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#ifndef INCLUDED_SD_SOURCE_UI_SIDEBAR_MASTERPAGECONTAINERFILLER_HXX
#define INCLUDED_SD_SOURCE_UI_SIDEBAR_MASTERPAGECONTAINERFILLER_HXX

#include "MasterPageContainer.hxx"
#include "MasterPageDescriptor.hxx"
#include "tools/AsynchronousTask.hxx"

namespace sd {
class TemplateScanner;
class TemplateEntry;
}

namespace sd { namespace sidebar {

/** Fill a MasterPageContainer with information about the available master
    pages.  These are provided by one default page and from the existing
    Impress templates.  This is done asynchronously.
*/
class MasterPageContainerFiller
    : public ::sd::tools::AsynchronousTask
{
public:
    class ContainerAdapter
    {
    public:
        virtual MasterPageContainer::Token PutMasterPage (
            const SharedMasterPageDescriptor& rpDescriptor) = 0;
        /** This method is called when all Impress templates have been added
            to the container via the PutMasterPage() method.
        */
        virtual void FillingDone() = 0;

    protected:
        ~ContainerAdapter() {}
    };

    explicit MasterPageContainerFiller (ContainerAdapter& rContainerAdapter);
    virtual ~MasterPageContainerFiller();

    /** Run the next step of the task.  After HasNextStep() returns false
        this method should ignore further calls.
    */
    virtual void RunNextStep() override;

    /** Return <TRUE/> when there is at least one more step to execute.
        When the task has been executed completely then <FALSE/> is
        returned.
    */
    virtual bool HasNextStep() override;

private:
    ContainerAdapter& mrContainerAdapter;
    // Remember what the next step has to do.
    enum State {
        INITIALIZE_TEMPLATE_SCANNER,
        SCAN_TEMPLATE,
        ADD_TEMPLATE,
        ERROR,
        DONE
    } meState;
    ::std::unique_ptr<TemplateScanner> mpScannerTask;
    const TemplateEntry* mpLastAddedEntry;
    int mnIndex;

    State ScanTemplate();
    State AddTemplate();
};

} } // end of namespace sd::sidebar

#endif

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