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/* -*- 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/.
*
* 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 <basegfx/range/b2drange.hxx>
#include <basegfx/range/b1drange.hxx>
#include <basegfx/range/b2dpolyrange.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
#include <osl/diagnose.h>
#include "layer.hxx"
using namespace ::com::sun::star;
namespace slideshow::internal
{
Layer::Layer( Dummy ) :
maViewEntries(),
maBounds(),
maNewBounds(),
mbBoundsDirty(false),
mbBackgroundLayer(true),
mbClipSet(false)
{
}
Layer::Layer() :
maViewEntries(),
maBounds(),
maNewBounds(),
mbBoundsDirty(false),
mbBackgroundLayer(false),
mbClipSet(false)
{
}
ViewLayerSharedPtr Layer::addView( const ViewSharedPtr& rNewView )
{
OSL_ASSERT( rNewView );
ViewEntryVector::iterator aIter;
const ViewEntryVector::iterator aEnd( maViewEntries.end() );
if( (aIter=std::find_if( maViewEntries.begin(),
aEnd,
[&rNewView]( const ViewEntry& rViewEntry )
{ return rViewEntry.getView() == rNewView; } ) ) != aEnd )
{
// already added - just return existing layer
return aIter->mpViewLayer;
}
// not yet added - create new view layer
ViewLayerSharedPtr pNewLayer;
if( mbBackgroundLayer )
pNewLayer = rNewView;
else
pNewLayer = rNewView->createViewLayer(maBounds);
// add to local list
maViewEntries.emplace_back( rNewView,
pNewLayer );
return maViewEntries.back().mpViewLayer;
}
ViewLayerSharedPtr Layer::removeView( const ViewSharedPtr& rView )
{
OSL_ASSERT( rView );
ViewEntryVector::iterator aIter;
const ViewEntryVector::iterator aEnd( maViewEntries.end() );
if( (aIter=std::find_if( maViewEntries.begin(),
aEnd,
[&rView]( const ViewEntry& rViewEntry )
{ return rViewEntry.getView() == rView; } ) ) == aEnd )
{
// View was not added/is already removed
return ViewLayerSharedPtr();
}
OSL_ENSURE( std::count_if( maViewEntries.begin(),
aEnd,
[&rView]( const ViewEntry& rViewEntry )
{ return rViewEntry.getView() == rView; } ) == 1,
"Layer::removeView(): view added multiple times" );
ViewLayerSharedPtr pRet( aIter->mpViewLayer );
maViewEntries.erase(aIter);
return pRet;
}
void Layer::setShapeViews( ShapeSharedPtr const& rShape ) const
{
rShape->clearAllViewLayers();
for( const auto& rViewEntry : maViewEntries )
rShape->addViewLayer( rViewEntry.getViewLayer(), false );
}
void Layer::setPriority( const ::basegfx::B1DRange& rPrioRange )
{
if( !mbBackgroundLayer )
{
for( const auto& rViewEntry : maViewEntries )
rViewEntry.getViewLayer()->setPriority( rPrioRange );
}
}
void Layer::addUpdateRange( ::basegfx::B2DRange const& rUpdateRange )
{
// TODO(Q1): move this to B2DMultiRange
if( !rUpdateRange.isEmpty() )
maUpdateAreas.appendElement( rUpdateRange,
basegfx::B2VectorOrientation::Positive );
}
void Layer::updateBounds( ShapeSharedPtr const& rShape )
{
if( !mbBackgroundLayer )
{
if( !mbBoundsDirty )
maNewBounds.reset();
maNewBounds.expand( rShape->getUpdateArea() );
}
mbBoundsDirty = true;
}
bool Layer::commitBounds()
{
mbBoundsDirty = false;
if( mbBackgroundLayer )
return false;
if( maNewBounds == maBounds )
return false;
maBounds = maNewBounds;
if( std::count_if( maViewEntries.begin(),
maViewEntries.end(),
[this]( const ViewEntry& rViewEntry )
{ return rViewEntry.getViewLayer()->resize( this->maBounds ); }
) == 0 )
{
return false;
}
// layer content invalid, update areas have wrong
// coordinates/not sensible anymore.
clearUpdateRanges();
return true;
}
void Layer::clearUpdateRanges()
{
maUpdateAreas.clear();
}
void Layer::clearContent()
{
// clear content on all view layers
for( const auto& rViewEntry : maViewEntries )
rViewEntry.getViewLayer()->clearAll();
// layer content cleared, update areas are not sensible
// anymore.
clearUpdateRanges();
}
class LayerEndUpdate
{
public:
LayerEndUpdate( const LayerEndUpdate& ) = delete;
LayerEndUpdate& operator=( const LayerEndUpdate& ) = delete;
explicit LayerEndUpdate( LayerSharedPtr const& rLayer ) :
mpLayer( rLayer )
{}
~LayerEndUpdate() { if(mpLayer) mpLayer->endUpdate(); }
private:
LayerSharedPtr mpLayer;
};
Layer::EndUpdater Layer::beginUpdate()
{
if( maUpdateAreas.count() )
{
// perform proper layer update. That means, setup proper
// clipping, and render each shape that intersects with
// the calculated update area
::basegfx::B2DPolyPolygon aClip( maUpdateAreas.solveCrossovers() );
aClip = ::basegfx::utils::stripNeutralPolygons(aClip);
aClip = ::basegfx::utils::stripDispensablePolygons(aClip);
// actually, if there happen to be shapes with zero
// update area in the maUpdateAreas vector, the
// resulting clip polygon will be empty.
if( aClip.count() )
{
for( const auto& rViewEntry : maViewEntries )
{
const ViewLayerSharedPtr& pViewLayer = rViewEntry.getViewLayer();
// set clip to all view layers and
pViewLayer->setClip( aClip );
// clear update area on all view layers
pViewLayer->clear();
}
mbClipSet = true;
}
}
return std::make_shared<LayerEndUpdate>(shared_from_this());
}
void Layer::endUpdate()
{
if( mbClipSet )
{
mbClipSet = false;
basegfx::B2DPolyPolygon aEmptyClip;
for( const auto& rViewEntry : maViewEntries )
rViewEntry.getViewLayer()->setClip( aEmptyClip );
}
clearUpdateRanges();
}
bool Layer::isInsideUpdateArea( ShapeSharedPtr const& rShape ) const
{
return maUpdateAreas.overlaps( rShape->getUpdateArea() );
}
LayerSharedPtr Layer::createBackgroundLayer()
{
return LayerSharedPtr(new Layer( BackgroundLayer ));
}
LayerSharedPtr Layer::createLayer( )
{
return LayerSharedPtr( new Layer );
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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