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

/*

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 * 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 .

 */

#include <comphelper/namedvaluecollection.hxx>

#include <comphelper/processfactory.hxx>

#include <vcl/svapp.hxx>

#include <vcl/toolkit/throbber.hxx>

#include <com/sun/star/graphic/GraphicProvider.hpp>

#include <com/sun/star/awt/ImageScaleMode.hpp>

#include <limits>

using ::com::sun::star::uno::Reference;

using ::com::sun::star::graphic::XGraphic;

using ::com::sun::star::graphic::XGraphicProvider;

using ::com::sun::star::uno::Exception;

namespace ImageScaleMode = css::awt::ImageScaleMode;

Throbber::Throbber(vcl::Window* pParentWindow, WinBits eStyle )

    :ImageControl(pParentWindow, eStyle )

    ,mbRepeat( true )

    ,mnStepTime( 100 )

    ,mnCurStep( 0 )

    ,maWaitTimer("Throbber maWaitTimer")

{

    maWaitTimer.SetTimeout( mnStepTime );

    maWaitTimer.SetInvokeHandler( LINK( this, Throbber, TimeOutHdl ) );

    SetScaleMode( ImageScaleMode::NONE );

    initImages();

}

Unexecuted instantiation: Throbber::Throbber(vcl::Window*, long)

Unexecuted instantiation: Throbber::Throbber(vcl::Window*, long)

Throbber::~Throbber()

{

    disposeOnce();

}

void Throbber::dispose()

{

    maWaitTimer.Stop();

    ImageControl::dispose();

}

namespace

{

    ::std::vector< Image > lcl_loadImageSet( const Throbber::ImageSet i_imageSet )

    {

        ::std::vector< Image > aImages;

        const Reference< css::uno::XComponentContext >& aContext( ::comphelper::getProcessComponentContext() );

        const Reference< XGraphicProvider > xGraphicProvider( css::graphic::GraphicProvider::create(aContext) );

        ::std::vector< OUString > aImageURLs( Throbber::getDefaultImageURLs( i_imageSet ) );

        aImages.reserve( aImageURLs.size() );

        ::comphelper::NamedValueCollection aMediaProperties;

        for ( const auto& rImageURL : aImageURLs )

        {

            Reference< XGraphic > xGraphic;

            aMediaProperties.put( u"URL"_ustr, rImageURL );

            xGraphic = xGraphicProvider->queryGraphic( aMediaProperties.getPropertyValues() );

            aImages.emplace_back( xGraphic );

        }

        return aImages;

    }

}

void Throbber::Resize()

{

    ImageControl::Resize();

    initImages();

}

void Throbber::initImages()

{

    try

    {

        ::std::vector< ::std::vector< Image > > aImageSets

        {

            lcl_loadImageSet( ImageSet::N16px ),

            lcl_loadImageSet( ImageSet::N32px ),

            lcl_loadImageSet( ImageSet::N64px )

        };

        // find the best matching image set (size-wise)

        const ::Size aWindowSizePixel = GetSizePixel();

        size_t nPreferredSet = 0;

        if ( aImageSets.size() > 1 )

        {

            tools::Long nMinimalDistance = ::std::numeric_limits< tools::Long >::max();

            for (   ::std::vector< ::std::vector< Image > >::const_iterator check = aImageSets.begin();

                    check != aImageSets.end();

                    ++check

                )

            {

                if ( check->empty() )

                {

                    SAL_WARN( "vcl.control", "Throbber::initImages: illegal image!" );

                    continue;

                }

                const Size aImageSize = (*check)[0].GetSizePixel();

                if  (   ( aImageSize.Width() > aWindowSizePixel.Width() )

                    ||  ( aImageSize.Height() > aWindowSizePixel.Height() )

                    )

                    // do not use an image set which doesn't fit into the window

                    continue;

                const sal_Int64 distance =

                        ( aWindowSizePixel.Width() - aImageSize.Width() ) * ( aWindowSizePixel.Width() - aImageSize.Width() )

                    +   ( aWindowSizePixel.Height() - aImageSize.Height() ) * ( aWindowSizePixel.Height() - aImageSize.Height() );

                if ( distance < nMinimalDistance )

                {

                    nMinimalDistance = distance;

                    nPreferredSet = check - aImageSets.begin();

                }

            }

        }

        if ( nPreferredSet < aImageSets.size() )

            setImageList( std::vector(aImageSets[nPreferredSet]) );

    }

    catch( const Exception& )

    {

    }

}

void Throbber::start()

{

    maWaitTimer.SetTimeout(mnStepTime);

    maWaitTimer.Start();

}

void Throbber::stop()

{

    maWaitTimer.Stop();

}

bool Throbber::isRunning() const

{

    return maWaitTimer.IsActive();

}

void Throbber::setImageList( ::std::vector< Image > && i_images )

{

    SAL_WARN_IF( i_images.size()>=SAL_MAX_INT32, "vcl.control", "Throbber::setImageList: too many images!" );

    maImageList = std::move(i_images);

    const Image aInitialImage( !maImageList.empty() ? maImageList[ 0 ] : Image() );

    SetImage( aInitialImage );

}

::std::vector< OUString > Throbber::getDefaultImageURLs( const ImageSet i_imageSet )

{

    ::std::vector< OUString > aImageURLs;

    sal_Unicode const* const pResolutions[] = { u"16", u"32", u"64" };

    size_t const nImageCounts[] = { 6, 12, 12 };

    size_t index = 0;

    switch ( i_imageSet )

    {

    case ImageSet::N16px:  index = 0;  break;

    case ImageSet::N32px:  index = 1;  break;

    case ImageSet::N64px:  index = 2;  break;

    }

    aImageURLs.reserve( nImageCounts[index] );

    for ( size_t i=0; i<nImageCounts[index]; ++i )

    {

        OUStringBuffer aURL( OUString::Concat("private:graphicrepository/vcl/res/spinner-")

            + pResolutions[index]

            + "-" );

        if ( i < 9 )

            aURL.append( "0" );

        aURL.append( OUString::number( sal_Int32( i + 1 ) ) + ".png" );

        aImageURLs.push_back( aURL.makeStringAndClear() );

    }

    return aImageURLs;

}

IMPL_LINK_NOARG(Throbber, TimeOutHdl, Timer *, void)

{

    SolarMutexGuard aGuard;

    if ( maImageList.empty() )

        return;

    if ( mnCurStep < static_cast<sal_Int32>(maImageList.size()-1) )

        ++mnCurStep;

    else

    {

        if ( mbRepeat )

        {

            // start over

            mnCurStep = 0;

        }

        else

        {

            stop();

        }

    }

    SetImage( maImageList[ mnCurStep ] );

}

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