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 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"
#include <svx/sdr/overlay/overlayselection.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
#include <svtools/optionsdrawinglayer.hxx>
#include <vcl/svapp.hxx>
#include <vcl/outdev.hxx>
#include <drawinglayer/primitive2d/invertprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
#include <svx/sdr/overlay/overlaymanager.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
	namespace overlay
	{
        // combine rages geometrically to a single, ORed polygon
		basegfx::B2DPolyPolygon impCombineRangesToPolyPolygon(const std::vector< basegfx::B2DRange >& rRanges)
		{
            const sal_uInt32 nCount(rRanges.size());
			basegfx::B2DPolyPolygon aRetval;

			for(sal_uInt32 a(0); a < nCount; a++)
            {
				const basegfx::B2DPolygon aDiscretePolygon(basegfx::tools::createPolygonFromRect(rRanges[a]));

				if(0 == a)
				{
					aRetval.append(aDiscretePolygon);
				}
				else
				{
					aRetval = basegfx::tools::solvePolygonOperationOr(aRetval, basegfx::B2DPolyPolygon(aDiscretePolygon));
				}
			}

			return aRetval;
		}

		// check if wanted type OVERLAY_TRANSPARENT or OVERLAY_SOLID 
		// is possible. If not, fallback to invert mode (classic mode)
    	OverlayType impCheckPossibleOverlayType(OverlayType aOverlayType)
        {
			if(OVERLAY_INVERT != aOverlayType)
			{
				const SvtOptionsDrawinglayer aSvtOptionsDrawinglayer;

				if(!aSvtOptionsDrawinglayer.IsTransparentSelection())
				{
					// not possible when switched off by user
					return OVERLAY_INVERT;
				}
				else
				{
					const OutputDevice *pOut = Application::GetDefaultDevice();
					
					if(pOut->GetSettings().GetStyleSettings().GetHighContrastMode())
					{
						// not possible when in high contrast mode
						return  OVERLAY_INVERT;
					}

					if(!pOut->supportsOperation(OutDevSupport_TransparentRect))
					{
						// not possible when no fast transparence paint is supported on the system
						return OVERLAY_INVERT;
					}
				}
			}

            return aOverlayType;
        }

        drawinglayer::primitive2d::Primitive2DSequence OverlaySelection::createOverlayObjectPrimitive2DSequence()
		{
			drawinglayer::primitive2d::Primitive2DSequence aRetval;
			const sal_uInt32 nCount(getRanges().size());

			if(nCount)
			{
				// create range primitives
                const bool bInvert(OVERLAY_INVERT == maLastOverlayType);
			    basegfx::BColor aRGBColor(getBaseColor().getBColor());
                aRetval.realloc(nCount);

                if(bInvert)
                {
                    // force color to white for invert to get a full invert
                    aRGBColor = basegfx::BColor(1.0, 1.0, 1.0);
                }

				for(sal_uInt32 a(0);a < nCount; a++)
				{
					const basegfx::B2DPolygon aPolygon(basegfx::tools::createPolygonFromRect(maRanges[a]));
					aRetval[a] = drawinglayer::primitive2d::Primitive2DReference(
						new drawinglayer::primitive2d::PolyPolygonColorPrimitive2D(
							basegfx::B2DPolyPolygon(aPolygon),
							aRGBColor));
				}

				if(bInvert)
				{
					// embed all in invert primitive
					const drawinglayer::primitive2d::Primitive2DReference aInvert(
						new drawinglayer::primitive2d::InvertPrimitive2D(
							aRetval));
					aRetval = drawinglayer::primitive2d::Primitive2DSequence(&aInvert, 1);
				}
                else if(OVERLAY_TRANSPARENT == maLastOverlayType)
                {
			        // embed all rectangles in transparent paint
					const double fTransparence(mnLastTransparence / 100.0);
					const drawinglayer::primitive2d::Primitive2DReference aUnifiedTransparence(
				        new drawinglayer::primitive2d::UnifiedTransparencePrimitive2D(
					        aRetval,
					        fTransparence));

                    if(getBorder())
                    {
					    const basegfx::B2DPolyPolygon aPolyPolygon(impCombineRangesToPolyPolygon(getRanges()));
			            const drawinglayer::primitive2d::Primitive2DReference aSelectionOutline(
				            new drawinglayer::primitive2d::PolyPolygonHairlinePrimitive2D(
					            aPolyPolygon,
					            aRGBColor));

                        // add both to result
                        aRetval.realloc(2);
                        aRetval[0] = aUnifiedTransparence;
                        aRetval[1] = aSelectionOutline;
                    }
                    else
                    {
                        // just add transparent part
    					aRetval = drawinglayer::primitive2d::Primitive2DSequence(&aUnifiedTransparence, 1);
                    }
                }
			}

			return aRetval;
		}

		OverlaySelection::OverlaySelection(
			OverlayType eType, 
			const Color& rColor, 
			const std::vector< basegfx::B2DRange >& rRanges,
            bool bBorder)
		:	OverlayObject(rColor),
            meOverlayType(eType),
            maRanges(rRanges),
            maLastOverlayType(eType),
            mnLastTransparence(0),
            mbBorder(bBorder)
		{
            // no AA for selection overlays
            allowAntiAliase(false);
		}
		
		OverlaySelection::~OverlaySelection()
		{
			if(getOverlayManager())
			{
				getOverlayManager()->remove(*this);
			}
		}

		drawinglayer::primitive2d::Primitive2DSequence OverlaySelection::getOverlayObjectPrimitive2DSequence() const
        {
            // get current values
           	const OverlayType aNewOverlayType(impCheckPossibleOverlayType(meOverlayType));
			const SvtOptionsDrawinglayer aSvtOptionsDrawinglayer;
			const sal_uInt16 nNewTransparence(aSvtOptionsDrawinglayer.GetTransparentSelectionPercent());

			if(getPrimitive2DSequence().hasElements())
			{
                if(aNewOverlayType != maLastOverlayType
                    || nNewTransparence != mnLastTransparence)
                {
                    // conditions of last local decomposition have changed, delete
				    const_cast< OverlaySelection* >(this)->setPrimitive2DSequence(drawinglayer::primitive2d::Primitive2DSequence());
                }
			}

			if(!getPrimitive2DSequence().hasElements())
			{
				// remember new values
				const_cast< OverlaySelection* >(this)->maLastOverlayType = aNewOverlayType;
				const_cast< OverlaySelection* >(this)->mnLastTransparence = nNewTransparence;
			}

			// call base implementation
			return OverlayObject::getOverlayObjectPrimitive2DSequence();
        }

		void OverlaySelection::setRanges(const std::vector< basegfx::B2DRange >& rNew)
		{
			if(rNew != maRanges)
			{
				maRanges = rNew;
				objectChange();
			}
		}
	} // end of namespace overlay
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////
// eof