Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 485 insertions, 0 deletions

diff --git a/slideshow/source/engine/slide/userpaintoverlay.cxx b/slideshow/source/engine/slide/userpaintoverlay.cxx
new file mode 100644
index 000000000..d635fc60a
--- /dev/null
+++ b/slideshow/source/engine/slide/userpaintoverlay.cxx
@@ -0,0 +1,485 @@
+/* -*- 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 <com/sun/star/awt/MouseButton.hpp>
+#include <com/sun/star/awt/MouseEvent.hpp>
+
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <slideshowcontext.hxx>
+#include "userpaintoverlay.hxx"
+#include <mouseeventhandler.hxx>
+#include <eventmultiplexer.hxx>
+#include <screenupdater.hxx>
+#include <vieweventhandler.hxx>
+
+#include <slide.hxx>
+#include <cursormanager.hxx>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+        class PaintOverlayHandler : public MouseEventHandler,
+                                    public ViewEventHandler,
+                    public UserPaintEventHandler
+        {
+        public:
+            PaintOverlayHandler( const RGBColor&          rStrokeColor,
+                                 double                   nStrokeWidth,
+                                 ScreenUpdater&           rScreenUpdater,
+                                 const UnoViewContainer&  rViews,
+                                 Slide&                   rSlide,
+                                 PolyPolygonVector&&      rPolygons,
+                                 bool                     bActive ) :
+                mrScreenUpdater( rScreenUpdater ),
+                maViews(),
+                maPolygons( std::move(rPolygons) ),
+                maStrokeColor( rStrokeColor ),
+                mnStrokeWidth( nStrokeWidth ),
+                maLastPoint(),
+                maLastMouseDownPos(),
+                mbIsLastPointValid( false ),
+                mbIsLastMouseDownPosValid( false ),
+                //handle the "remove all ink from slide" mode of erasing
+                mbIsEraseAllModeActivated( false ),
+                //handle the "remove stroke by stroke" mode of erasing
+                mbIsEraseModeActivated( false ),
+                mrSlide(rSlide),
+                mnSize(100),
+                mbActive( bActive )
+            {
+                for( const auto& rView : rViews )
+                    viewAdded( rView );
+
+                drawPolygons();
+            }
+
+            void dispose()
+            {
+                maViews.clear();
+            }
+
+            // ViewEventHandler methods
+            virtual void viewAdded( const UnoViewSharedPtr& rView ) override
+            {
+                maViews.push_back( rView );
+            }
+
+            virtual void viewRemoved( const UnoViewSharedPtr& rView ) override
+            {
+                maViews.erase( ::std::remove( maViews.begin(),
+                                              maViews.end(),
+                                              rView ) );
+            }
+
+            virtual void viewChanged( const UnoViewSharedPtr& /*rView*/ ) override
+            {
+                // TODO(F2): for persistent drawings, need to store
+                // polygon and repaint here.
+            }
+
+            virtual void viewsChanged() override
+            {
+                // TODO(F2): for persistent drawings, need to store
+                // polygon and repaint here.
+            }
+
+            bool colorChanged( RGBColor const& rUserColor ) override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                maStrokeColor = rUserColor;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            bool widthChanged( double nUserStrokeWidth ) override
+            {
+                mnStrokeWidth = nUserStrokeWidth;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            void repaintWithoutPolygons()
+            {
+                    // must get access to the instance to erase all polygon
+                    for( const auto& rxView : maViews )
+                    {
+                        // fully clear view content to background color
+                        //rxView->getCanvas()->clear();
+
+                        //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+                        SlideBitmapSharedPtr         pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+                        ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+                        const ::basegfx::B2DHomMatrix   aViewTransform( rxView->getTransformation() );
+                        const ::basegfx::B2DPoint       aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+                        // setup a canvas with device coordinate space, the slide
+                        // bitmap already has the correct dimension.
+                        ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+                        pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+                        // render at given output position
+                        pBitmap->move( aOutPosPixel );
+
+                        // clear clip (might have been changed, e.g. from comb
+                        // transition)
+                        pBitmap->clip( ::basegfx::B2DPolyPolygon() );
+                        pBitmap->draw( pDevicePixelCanvas );
+
+                        mrScreenUpdater.notifyUpdate(rxView,true);
+                    }
+            }
+
+            bool eraseAllInkChanged( bool bEraseAllInk ) override
+            {
+                mbIsEraseAllModeActivated = bEraseAllInk;
+                // if the erase all mode is activated it will remove all ink from slide,
+                // therefore destroy all the polygons stored
+                if(mbIsEraseAllModeActivated)
+                {
+                    // The Erase Mode should be deactivated
+                    mbIsEraseModeActivated = false;
+                    repaintWithoutPolygons();
+                    maPolygons.clear();
+                }
+                mbIsEraseAllModeActivated=false;
+                return true;
+            }
+
+            bool eraseInkWidthChanged( sal_Int32 rEraseInkSize ) override
+            {
+                // Change the size
+                mnSize=rEraseInkSize;
+                // Changed to mode Erase
+                mbIsEraseModeActivated = true;
+                return true;
+            }
+
+            bool switchPenMode() override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            bool switchEraserMode() override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                mbIsEraseModeActivated = true;
+                return true;
+            }
+
+            bool disable() override
+            {
+                mbIsLastPointValid = false;
+                mbIsLastMouseDownPosValid = false;
+                mbActive = false;
+                return true;
+            }
+
+            //Draw all registered polygons.
+            void drawPolygons()
+            {
+                for( const auto& rxPolygon : maPolygons )
+                {
+                    rxPolygon->draw();
+                }
+                // screen update necessary to show painting
+                mrScreenUpdater.notifyUpdate();
+            }
+
+            //Retrieve all registered polygons.
+            const PolyPolygonVector& getPolygons() const
+            {
+                return maPolygons;
+            }
+
+            // MouseEventHandler methods
+            virtual bool handleMousePressed( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if (e.Buttons != awt::MouseButton::LEFT)
+                    return false;
+
+                maLastMouseDownPos.setX( e.X );
+                maLastMouseDownPos.setY( e.Y );
+                mbIsLastMouseDownPosValid = true;
+
+                // eat mouse click (though we don't process it
+                // _directly_, it enables the drag mode
+                return true;
+            }
+
+            virtual bool handleMouseReleased( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if (e.Buttons != awt::MouseButton::LEFT)
+                    return false;
+
+                // check, whether up- and down press are on exactly
+                // the same pixel. If that's the case, ignore the
+                // click, and pass on the event to low-prio
+                // handlers. This effectively permits effect
+                // advancements via clicks also when user paint is
+                // enabled.
+                if( mbIsLastMouseDownPosValid &&
+                    ::basegfx::B2DPoint( e.X,
+                                         e.Y ) == maLastMouseDownPos )
+                {
+                    mbIsLastMouseDownPosValid = false;
+                    return false;
+                }
+
+                // invalidate, next downpress will have to start a new
+                // polygon.
+                mbIsLastPointValid = false;
+
+                // eat mouse click (though we don't process it
+                // _directly_, it enables the drag mode
+                return true;
+            }
+
+            virtual bool handleMouseDragged( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if(mbIsEraseModeActivated)
+                {
+                    //define the last point as an object
+                    //we suppose that there's no way this point could be valid
+                    ::basegfx::B2DPolygon aPoly;
+
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y+mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X+mnSize );
+                    maLastPoint.setY( e.Y+mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X+mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+
+                    //now we have defined a Polygon that is closed
+
+                    //The point is to redraw the LastPoint the way it was originally on the bitmap,
+                    //of the slide
+                    for (const auto& rxView : maViews)
+                    {
+
+                        //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+                        SlideBitmapSharedPtr         pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+                        ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+                        ::basegfx::B2DHomMatrix     aViewTransform( rxView->getTransformation() );
+                        const ::basegfx::B2DPoint       aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+                        // setup a canvas with device coordinate space, the slide
+                        // bitmap already has the correct dimension.
+                        ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+                        pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+                        // render at given output position
+                        pBitmap->move( aOutPosPixel );
+
+                        ::basegfx::B2DPolyPolygon aPolyPoly(aPoly);
+                        aViewTransform.translate(-aOutPosPixel.getX(), -aOutPosPixel.getY());
+                        aPolyPoly.transform(aViewTransform);
+                        // set clip so that we just redraw a part of the canvas
+                        pBitmap->clip(aPolyPoly);
+                        pBitmap->draw( pDevicePixelCanvas );
+
+                        mrScreenUpdater.notifyUpdate(rxView,true);
+                    }
+
+                }
+                else
+                {
+                    if( !mbIsLastPointValid )
+                    {
+                        mbIsLastPointValid = true;
+                        maLastPoint.setX( e.X );
+                        maLastPoint.setY( e.Y );
+                    }
+                    else
+                    {
+                        ::basegfx::B2DPolygon aPoly;
+                        aPoly.append( maLastPoint );
+
+                        maLastPoint.setX( e.X );
+                        maLastPoint.setY( e.Y );
+
+                        aPoly.append( maLastPoint );
+
+                        // paint to all views
+                        for (const auto& rxView : maViews)
+                        {
+                            ::cppcanvas::PolyPolygonSharedPtr pPolyPoly(
+                                ::cppcanvas::BaseGfxFactory::createPolyPolygon( rxView->getCanvas(),
+                                                                                aPoly ) );
+
+                            if( pPolyPoly )
+                            {
+                                pPolyPoly->setStrokeWidth(mnStrokeWidth);
+                                pPolyPoly->setRGBALineColor( maStrokeColor.getIntegerColor() );
+                                pPolyPoly->draw();
+                                maPolygons.push_back(pPolyPoly);
+                            }
+                        }
+
+                        // screen update necessary to show painting
+                        mrScreenUpdater.notifyUpdate();
+                    }
+                }
+                // mouse events captured
+                return true;
+            }
+
+            virtual bool handleMouseMoved( const awt::MouseEvent& /*e*/ ) override
+            {
+                // not used here
+                return false; // did not handle the event
+            }
+
+        private:
+            ScreenUpdater&          mrScreenUpdater;
+            UnoViewVector           maViews;
+            PolyPolygonVector       maPolygons;
+            RGBColor                maStrokeColor;
+            double                  mnStrokeWidth;
+            basegfx::B2DPoint       maLastPoint;
+            basegfx::B2DPoint       maLastMouseDownPos;
+            bool                    mbIsLastPointValid;
+            bool                    mbIsLastMouseDownPosValid;
+            // added bool for erasing purpose :
+            bool                    mbIsEraseAllModeActivated;
+            bool                    mbIsEraseModeActivated;
+            Slide&                  mrSlide;
+            sal_Int32               mnSize;
+            bool                    mbActive;
+        };
+
+        UserPaintOverlaySharedPtr UserPaintOverlay::create( const RGBColor&          rStrokeColor,
+                                                            double                   nStrokeWidth,
+                                                            const SlideShowContext&  rContext,
+                                                            PolyPolygonVector&&      rPolygons,
+                                                            bool                     bActive )
+        {
+            UserPaintOverlaySharedPtr pRet( new UserPaintOverlay( rStrokeColor,
+                                                                  nStrokeWidth,
+                                                                  rContext,
+                                                                  std::move(rPolygons),
+                                                                  bActive));
+
+            return pRet;
+        }
+
+        UserPaintOverlay::UserPaintOverlay( const RGBColor&          rStrokeColor,
+                                            double                   nStrokeWidth,
+                                            const SlideShowContext&  rContext,
+                                            PolyPolygonVector&&      rPolygons,
+                                            bool                     bActive ) :
+            mpHandler( std::make_shared<PaintOverlayHandler>( rStrokeColor,
+                                                nStrokeWidth,
+                                                rContext.mrScreenUpdater,
+                                                rContext.mrViewContainer,
+                                                //adding a link to Slide
+                                                dynamic_cast<Slide&>(rContext.mrCursorManager),
+                                                std::move(rPolygons), bActive )),
+            mrMultiplexer( rContext.mrEventMultiplexer )
+        {
+            mrMultiplexer.addClickHandler( mpHandler, 3.0 );
+            mrMultiplexer.addMouseMoveHandler( mpHandler, 3.0 );
+            mrMultiplexer.addViewHandler( mpHandler );
+            mrMultiplexer.addUserPaintHandler(mpHandler);
+        }
+
+        PolyPolygonVector const & UserPaintOverlay::getPolygons() const
+        {
+            return mpHandler->getPolygons();
+        }
+
+        void UserPaintOverlay::drawPolygons()
+        {
+            mpHandler->drawPolygons();
+        }
+
+        UserPaintOverlay::~UserPaintOverlay()
+        {
+            try
+            {
+                mrMultiplexer.removeMouseMoveHandler( mpHandler );
+                mrMultiplexer.removeClickHandler( mpHandler );
+                mrMultiplexer.removeViewHandler( mpHandler );
+                mpHandler->dispose();
+            }
+            catch (const uno::Exception&)
+            {
+                TOOLS_WARN_EXCEPTION("slideshow", "");
+            }
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */