Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 272 insertions, 0 deletions

diff --git a/slideshow/source/engine/slide/layer.cxx b/slideshow/source/engine/slide/layer.cxx
new file mode 100644
index 000000000..01ce4efa4
--- /dev/null
+++ b/slideshow/source/engine/slide/layer.cxx
@@ -0,0 +1,272 @@
+/* -*- 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: */