/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#include <vcl/event.hxx>
#include <vcl/imgctrl.hxx>
#include <tools/rcid.h>

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

namespace ImageScaleMode = ::com::sun::star::awt::ImageScaleMode;

// -----------------------------------------------------------------------

ImageControl::ImageControl( Window* pParent, WinBits nStyle )
    :FixedImage( pParent, nStyle )
    ,mnScaleMode( ImageScaleMode::ANISOTROPIC )
{
}

// -----------------------------------------------------------------------

ImageControl::ImageControl( Window* pParent, const ResId& rResId )
    :FixedImage( pParent, rResId )
    ,mnScaleMode( ImageScaleMode::ANISOTROPIC )
{
}

// -----------------------------------------------------------------------

void ImageControl::SetScaleMode( const ::sal_Int16 _nMode )
{
    if ( _nMode != mnScaleMode )
    {
        mnScaleMode = _nMode;
        Invalidate();
    }
}

// -----------------------------------------------------------------------

void ImageControl::Resize()
{
    Invalidate();
}

// -----------------------------------------------------------------------
namespace
{
    static Size lcl_calcPaintSize( const Rectangle& _rPaintRect, const Size& _rBitmapSize )
    {
        const Size aPaintSize = _rPaintRect.GetSize();

        const double nRatioX = 1.0 * aPaintSize.Width() / _rBitmapSize.Width();
        const double nRatioY = 1.0 * aPaintSize.Height() / _rBitmapSize.Height();
        const double nRatioMin = ::std::min( nRatioX, nRatioY );

        return Size( long( _rBitmapSize.Width() * nRatioMin ), long( _rBitmapSize.Height() * nRatioMin ) );
    }

    static Point lcl_centerWithin( const Rectangle& _rArea, const Size& _rObjectSize )
    {
        Point aPos( _rArea.TopLeft() );
        aPos.X() += ( _rArea.GetWidth() - _rObjectSize.Width() ) / 2;
        aPos.Y() += ( _rArea.GetHeight() - _rObjectSize.Height() ) / 2;
        return aPos;
    }
}

// -----------------------------------------------------------------------

void ImageControl::ImplDraw( OutputDevice& rDev, sal_uLong nDrawFlags, const Point& rPos, const Size& rSize ) const
{
	sal_uInt16 nStyle = 0;
	if ( !(nDrawFlags & WINDOW_DRAW_NODISABLE) )
	{
		if ( !IsEnabled() )
			nStyle |= IMAGE_DRAW_DISABLE;
	}

    const Image& rImage( GetModeImage( BMP_COLOR_NORMAL ) );
    const Image& rImageHC( GetModeImage( BMP_COLOR_HIGHCONTRAST ) );

    const Image* pImage = &rImage;
    if ( !!rImageHC && GetSettings().GetStyleSettings().GetHighContrastMode() )
		pImage = &rImageHC;

    const Rectangle aDrawRect( rPos, rSize );
    if ( !*pImage )
    {
        String  sText( GetText() );
        if ( !sText.Len() )
            return;

        WinBits nWinStyle = GetStyle();
	    sal_uInt16 nTextStyle = FixedText::ImplGetTextStyle( nWinStyle );
	    if ( !(nDrawFlags & WINDOW_DRAW_NODISABLE) )
		    if ( !IsEnabled() )
			    nTextStyle |= TEXT_DRAW_DISABLE;

        rDev.DrawText( aDrawRect, sText, nTextStyle );
        return;
    }

    const Size&      rBitmapSize = pImage->GetSizePixel();

    switch ( mnScaleMode )
    {
    case ImageScaleMode::NONE:
    {
	    rDev.DrawImage( lcl_centerWithin( aDrawRect, rBitmapSize ), *pImage, nStyle );
    }
    break;

    case ImageScaleMode::ISOTROPIC:
    {
        const Size aPaintSize = lcl_calcPaintSize( aDrawRect, rBitmapSize );
	    rDev.DrawImage(
            lcl_centerWithin( aDrawRect, aPaintSize ),
            aPaintSize,
            *pImage, nStyle );
    }
    break;

    case ImageScaleMode::ANISOTROPIC:
    {
	    rDev.DrawImage(
            aDrawRect.TopLeft(),
            aDrawRect.GetSize(),
            *pImage, nStyle );
    }
    break;

    default:
        OSL_ENSURE( false, "ImageControl::ImplDraw: unhandled scale mode!" );
        break;

    }   // switch ( mnScaleMode )
}

// -----------------------------------------------------------------------

void ImageControl::Paint( const Rectangle& /*rRect*/ )
{
	ImplDraw( *this, 0, Point(), GetOutputSizePixel() );

    if( HasFocus() )
    {
        Window *pWin = GetWindow( WINDOW_BORDER );

        sal_Bool bFlat = (GetBorderStyle() == 2);
        Rectangle aRect( Point(0,0), pWin->GetOutputSizePixel() );
        Color oldLineCol = pWin->GetLineColor();
        Color oldFillCol = pWin->GetFillColor();
        pWin->SetFillColor();
        pWin->SetLineColor( bFlat ? COL_WHITE : COL_BLACK );
        pWin->DrawRect( aRect );
        aRect.nLeft++;
        aRect.nRight--;
        aRect.nTop++;
        aRect.nBottom--;
        pWin->SetLineColor( bFlat ? COL_BLACK : COL_WHITE );
        pWin->DrawRect( aRect );
        pWin->SetLineColor( oldLineCol );
        pWin->SetFillColor( oldFillCol );
    }
}

// -----------------------------------------------------------------------
void ImageControl::Draw( OutputDevice* pDev, const Point& rPos, const Size& rSize, sal_uLong nFlags )
{
    const Point     aPos  = pDev->LogicToPixel( rPos );
    const Size      aSize = pDev->LogicToPixel( rSize );
          Rectangle aRect( aPos, aSize );

	pDev->Push();
	pDev->SetMapMode();

	// Border
	if ( !(nFlags & WINDOW_DRAW_NOBORDER) && (GetStyle() & WB_BORDER) )
	{
		ImplDrawFrame( pDev, aRect );
	}
	pDev->IntersectClipRegion( aRect );
	ImplDraw( *pDev, nFlags, aRect.TopLeft(), aRect.GetSize() );

	pDev->Pop();
}

// -----------------------------------------------------------------------

void ImageControl::GetFocus()
{
    FixedImage::GetFocus();
    GetWindow( WINDOW_BORDER )->Invalidate();
}

// -----------------------------------------------------------------------

void ImageControl::LoseFocus()
{
    FixedImage::GetFocus();
    GetWindow( WINDOW_BORDER )->Invalidate();
}