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| -rw-r--r-- | slideshow/source/inc/shape.hxx | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/slideshow/source/inc/shape.hxx b/slideshow/source/inc/shape.hxx new file mode 100644 index 000000000..9b6099462 --- /dev/null +++ b/slideshow/source/inc/shape.hxx @@ -0,0 +1,260 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_SHAPE_HXX +#define INCLUDED_SLIDESHOW_SOURCE_INC_SHAPE_HXX + +#include <com/sun/star/uno/Reference.hxx> +#include <com/sun/star/drawing/XShape.hpp> + +#include <basegfx/range/b2drectangle.hxx> + +#include "viewlayer.hxx" + +#include <memory> +#include <set> + +namespace basegfx { + class B2DRange; +} + +namespace slideshow +{ + namespace internal + { + // forward declaration necessary, because methods use ShapeSharedPtr + class Shape; + + typedef ::std::shared_ptr< Shape > ShapeSharedPtr; + + /** Represents a slide's shape object. + + This interface represents the view-independent aspects of a + slide's shape, providing bound rect, underlying XShape and + basic paint methods. + */ + class Shape + { + public: + Shape() = default; + virtual ~Shape() {} + Shape(const Shape&) = delete; + Shape& operator=(const Shape&) = delete; + + /** Get the associated XShape of this shape. + + @return the associated XShape. If this method returns + an empty reference, this object might be one of the + special-purpose shapes of a slide, which have no + direct corresponding XShape (the background comes to + mind here). + */ + virtual css::uno::Reference< css::drawing::XShape > getXShape() const = 0; + + + // View layer methods + + + /** Add a new view layer. + + This method adds a new view layer, this shape shall + show itself on. + + @param rNewLayer + New layer to show on + + @param bRedrawLayer + Redraw shape on given layer + */ + virtual void addViewLayer( const ViewLayerSharedPtr& rNewLayer, + bool bRedrawLayer ) = 0; + + /** Withdraw the shape from a view layer + + This method removes the shape from the given view + layer. + + @return true, if the shape was successfully removed + */ + virtual bool removeViewLayer( const ViewLayerSharedPtr& rNewLayer ) = 0; + + /** Withdraw all view layers at once + + This method will be faster than repeated + removeViewLayer() calls. + */ + virtual void clearAllViewLayers() = 0; + + // render methods + + + /** Update the shape + + This method updates the Shape on all registered view + layers, but only if shape content has actually + changed. + + @return whether the update finished successfully. + */ + virtual bool update() const = 0; + + /** Render the shape. + + This method renders the shape on all registered view + layers, regardless of whether shape content has + changed or not. + + @return whether the rendering finished successfully. + */ + virtual bool render() const = 0; + + /** Query whether shape content changed + + This method returns true, if shape content changed + since the last rendering (i.e. the shape needs an + update to reflect that changed content on the views). + */ + virtual bool isContentChanged() const = 0; + + + // Shape attributes + + + /** Get the current shape position and size. + + This method yields the currently effective shape + bounds (which might change over time, for animated + shapes). Please note that possibly shape rotations + from its original document state must not be taken + into account here: if you need the screen bounding + box, use getUpdateArea() instead. Note further that + shape rotations, which are already contained in the + shape as displayed in the original document + <em>are</em> included herein (we currently take the + shape as-is from the document, assuming a rotation + angle of 0). + */ + virtual ::basegfx::B2DRectangle getBounds() const = 0; + + /** Get the DOM position and size of the shape. + + This method yields the underlying DOM shape bounds, + i.e. the original shape bounds from the document + model. This value is <em>always</em> unaffected by any + animation activity. Note that shape rotations, which + are already contained in the shape as displayed in the + original document are already included herein (we + currently take the shape as-is from the document, + assuming a rotation angle of 0). + */ + virtual ::basegfx::B2DRectangle getDomBounds() const = 0; + + /** Get the current shape update area. + + This method yields the currently effective update area + for the shape, i.e. the area that needs to be updated, + should the shape be painted. Normally, this will be + the (possibly rotated and sheared) area returned by + getBounds(). + */ + virtual ::basegfx::B2DRectangle getUpdateArea() const = 0; + + /** Query whether the shape is visible at all. + + @return true, if this shape is visible, false + otherwise. + */ + virtual bool isVisible() const = 0; + + /** Get the shape priority. + + The shape priority defines the relative order of the + shapes on the slide. + + @return the priority. Will be in the [0,+infty) range. + */ + virtual double getPriority() const = 0; + + /** Query whether the Shape is currently detached from the + background. + + This method checks whether the Shape is currently + detached from the slide background, i.e. whether shape + updates affect the underlying slide background or + not. A shape that returns true here must not alter + slide content in any way when called render() or + update() (this is normally achieved by making this + shape a sprite). + */ + virtual bool isBackgroundDetached() const = 0; + + // Misc + + + /** Functor struct, for shape ordering + + This defines a strict weak ordering of shapes, primary + sort key is the shape priority, and secondary sort key + the object ptr value. Most typical use is for + associative containers holding shapes (and which also + have to maintain something like a paint order). + */ + struct lessThanShape + { + // make functor adaptable (to boost::bind) + typedef bool result_type; + + // since the ZOrder property on the XShape has somewhat + // peculiar attributes (it's basically the index of the shapes + // in the drawing layer's SdrObjList - which means, it starts + // from 0 for children of group objects), we cannot use it to determine + // drawing order. Thus, we rely on importer-provided order values here, + // which is basically a running counter during shape import (i.e. denotes + // the order of shape import). This is the correct order, at least for the + // current drawing core. + + // If, someday, the above proposition is no longer true, one directly use + // the shape's ZOrder property + + static bool compare(const Shape* pLHS, const Shape* pRHS) + { + const double nPrioL( pLHS->getPriority() ); + const double nPrioR( pRHS->getPriority() ); + + // if prios are equal, tie-break on ptr value + return nPrioL == nPrioR ? pLHS < pRHS : nPrioL < nPrioR; + } + + bool operator()(const ShapeSharedPtr& rLHS, const ShapeSharedPtr& rRHS) const + { + return compare(rLHS.get(),rRHS.get()); + } + + }; + }; + + /** A set which contains all shapes in an ordered fashion. + */ + typedef ::std::set< ShapeSharedPtr, Shape::lessThanShape > ShapeSet; + } +} + +#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SHAPE_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |