diff options
Diffstat (limited to 'slideshow/source/engine/shapes/backgroundshape.cxx')
| -rw-r--r-- | slideshow/source/engine/shapes/backgroundshape.cxx | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/slideshow/source/engine/shapes/backgroundshape.cxx b/slideshow/source/engine/shapes/backgroundshape.cxx new file mode 100644 index 000000000..d304b9f90 --- /dev/null +++ b/slideshow/source/engine/shapes/backgroundshape.cxx @@ -0,0 +1,299 @@ +/* -*- 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/beans/XPropertySet.hpp> + +#include <sal/log.hxx> +#include <o3tl/safeint.hxx> +#include <osl/diagnose.h> + +#include <algorithm> + +#include "backgroundshape.hxx" +#include <slideshowexceptions.hxx> +#include <slideshowcontext.hxx> +#include "gdimtftools.hxx" +#include <shape.hxx> +#include "viewbackgroundshape.hxx" + + +using namespace ::com::sun::star; + + +namespace slideshow::internal +{ + namespace { + + /** Representation of a draw document's background shape. + + This class implements the Shape interface for the + background shape. Since the background shape is neither + animatable nor attributable, those more specialized + derivations of the Shape interface are not implemented + here. + + @attention this class is to be treated 'final', i.e. one + should not derive from it. + */ + class BackgroundShape : public Shape + { + public: + /** Create the background shape. + + This method creates a shape that handles the + peculiarities of the draw API regarding background + content. + */ + BackgroundShape( const css::uno::Reference< css::drawing::XDrawPage >& xDrawPage, + const css::uno::Reference< css::drawing::XDrawPage >& xMasterPage, + const SlideShowContext& rContext ); // throw ShapeLoadFailedException; + + virtual css::uno::Reference< + css::drawing::XShape > getXShape() const override; + + // View layer methods + + + virtual void addViewLayer( const ViewLayerSharedPtr& rNewLayer, + bool bRedrawLayer ) override; + virtual bool removeViewLayer( const ViewLayerSharedPtr& rNewLayer ) override; + virtual void clearAllViewLayers() override; + + + // attribute methods + + + virtual ::basegfx::B2DRectangle getBounds() const override; + virtual ::basegfx::B2DRectangle getDomBounds() const override; + virtual ::basegfx::B2DRectangle getUpdateArea() const override; + virtual bool isVisible() const override; + virtual double getPriority() const override; + virtual bool isForeground() const override { return false; } + virtual bool isBackgroundDetached() const override; + + + // render methods + + + virtual bool update() const override; + virtual bool render() const override; + virtual bool isContentChanged() const override; + + private: + /// The metafile actually representing the Shape + GDIMetaFileSharedPtr mpMtf; + + // The attributes of this Shape + ::basegfx::B2DRectangle maBounds; // always needed for rendering + + /// the list of active view shapes (one for each registered view layer) + typedef ::std::vector< ViewBackgroundShapeSharedPtr > ViewBackgroundShapeVector; + ViewBackgroundShapeVector maViewShapes; + }; + + } + + BackgroundShape::BackgroundShape( const uno::Reference< drawing::XDrawPage >& xDrawPage, + const uno::Reference< drawing::XDrawPage >& xMasterPage, + const SlideShowContext& rContext ) : + mpMtf(), + maBounds(), + maViewShapes() + { + uno::Reference< beans::XPropertySet > xPropSet( xDrawPage, + uno::UNO_QUERY_THROW ); + // first try the page background (overrides + // masterpage background), then try masterpage + GDIMetaFileSharedPtr xMtf = getMetaFile(uno::Reference<lang::XComponent>(xDrawPage, uno::UNO_QUERY), + xDrawPage, MTF_LOAD_BACKGROUND_ONLY, + rContext.mxComponentContext); + + if (!xMtf) + { + xMtf = getMetaFile( uno::Reference<lang::XComponent>(xMasterPage, uno::UNO_QUERY), + xDrawPage, MTF_LOAD_BACKGROUND_ONLY, + rContext.mxComponentContext ); + } + + if (!xMtf) + { + throw ShapeLoadFailedException(); + } + + // there is a special background shape, add it + // as the first one + + sal_Int32 nDocWidth=0; + sal_Int32 nDocHeight=0; + xPropSet->getPropertyValue("Width") >>= nDocWidth; + xPropSet->getPropertyValue("Height") >>= nDocHeight; + + mpMtf = xMtf; + maBounds = ::basegfx::B2DRectangle( 0,0,nDocWidth, nDocHeight ); + } + + uno::Reference< drawing::XShape > BackgroundShape::getXShape() const + { + // no real XShape representative + return uno::Reference< drawing::XShape >(); + } + + void BackgroundShape::addViewLayer( const ViewLayerSharedPtr& rNewLayer, + bool bRedrawLayer ) + { + // already added? + if( ::std::any_of( maViewShapes.begin(), + maViewShapes.end(), + [&rNewLayer]( const ViewBackgroundShapeSharedPtr& pBgShape ) + { return pBgShape->getViewLayer() == rNewLayer; } ) ) + { + // yes, nothing to do + return; + } + + maViewShapes.push_back( + std::make_shared<ViewBackgroundShape>( + rNewLayer, maBounds ) ); + + // render the Shape on the newly added ViewLayer + if( bRedrawLayer ) + maViewShapes.back()->render( mpMtf ); + } + + bool BackgroundShape::removeViewLayer( const ViewLayerSharedPtr& rLayer ) + { + const ViewBackgroundShapeVector::iterator aEnd( maViewShapes.end() ); + + OSL_ENSURE( ::std::count_if(maViewShapes.begin(), + aEnd, + [&rLayer]( const ViewBackgroundShapeSharedPtr& pBgShape ) + { return pBgShape->getViewLayer() == rLayer; } ) < 2, + "BackgroundShape::removeViewLayer(): Duplicate ViewLayer entries!" ); + + ViewBackgroundShapeVector::iterator aIter; + + if( (aIter=::std::remove_if( maViewShapes.begin(), + aEnd, + [&rLayer]( const ViewBackgroundShapeSharedPtr& pBgShape ) + { return pBgShape->getViewLayer() == rLayer; } )) == aEnd ) + { + // view layer seemingly was not added, failed + return false; + } + + // actually erase from container + maViewShapes.erase( aIter, aEnd ); + + return true; + } + + void BackgroundShape::clearAllViewLayers() + { + maViewShapes.clear(); + } + + ::basegfx::B2DRectangle BackgroundShape::getBounds() const + { + return maBounds; + } + + ::basegfx::B2DRectangle BackgroundShape::getDomBounds() const + { + return maBounds; + } + + ::basegfx::B2DRectangle BackgroundShape::getUpdateArea() const + { + // TODO(F1): Need to expand background, too, when + // antialiasing? + + // no transformation etc. possible for background shape + return maBounds; + } + + bool BackgroundShape::isVisible() const + { + return true; + } + + double BackgroundShape::getPriority() const + { + return 0.0; // lowest prio, we're the background + } + + bool BackgroundShape::update() const + { + return render(); + } + + bool BackgroundShape::render() const + { + SAL_INFO( "slideshow", "::presentation::internal::BackgroundShape::render()" ); + SAL_INFO( "slideshow", "::presentation::internal::BackgroundShape: 0x" << std::hex << this ); + + // gcc again... + const ::basegfx::B2DRectangle& rCurrBounds( BackgroundShape::getBounds() ); + + if( rCurrBounds.getRange().equalZero() ) + { + // zero-sized shapes are effectively invisible, + // thus, we save us the rendering... + return true; + } + + // redraw all view shapes, by calling their render() method + if( o3tl::make_unsigned(::std::count_if( maViewShapes.begin(), + maViewShapes.end(), + [this]( const ViewBackgroundShapeSharedPtr& pBgShape ) + { return pBgShape->render( this->mpMtf ); } )) + != maViewShapes.size() ) + { + // at least one of the ViewBackgroundShape::render() calls did return + // false - update failed on at least one ViewLayer + return false; + } + + return true; + } + + bool BackgroundShape::isContentChanged() const + { + return false; + } + + bool BackgroundShape::isBackgroundDetached() const + { + return false; // we're not animatable + } + + + ShapeSharedPtr createBackgroundShape( + const uno::Reference< drawing::XDrawPage >& xDrawPage, + const uno::Reference< drawing::XDrawPage >& xMasterPage, + const SlideShowContext& rContext ) + { + return std::make_shared<BackgroundShape>( + xDrawPage, + xMasterPage, + rContext ); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |