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Diffstat (limited to '')
-rw-r--r-- | include/basegfx/range/b2dpolyrange.hxx | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/include/basegfx/range/b2dpolyrange.hxx b/include/basegfx/range/b2dpolyrange.hxx new file mode 100644 index 000000000..9a366956c --- /dev/null +++ b/include/basegfx/range/b2dpolyrange.hxx @@ -0,0 +1,93 @@ +/* -*- 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 . + */ + +#pragma once + +#include <o3tl/cow_wrapper.hxx> +#include <tuple> +#include <basegfx/vector/b2enums.hxx> +#include <basegfx/basegfxdllapi.h> + +namespace basegfx +{ + class B2DRange; + class B2DPolyPolygon; + class B2DHomMatrix; + class ImplB2DPolyRange; + + /** Multiple ranges in one object. + + This class combines multiple ranges in one object, providing a + total, enclosing range for it. + + You can use this class e.g. when updating views containing + rectangular objects. Add each modified object to a + B2DMultiRange, then test each viewable object against + intersection with the multi range. + + Similar in spirit to the poly-polygon vs. polygon relationship. + + Note that comparable to polygons, a poly-range can also + contain 'holes' - this is encoded via polygon orientation at + the poly-polygon, and via explicit flags for the poly-range. + */ + class BASEGFX_DLLPUBLIC B2DPolyRange + { + public: + typedef std::tuple<B2DRange, B2VectorOrientation> ElementType; + + B2DPolyRange(); + ~B2DPolyRange(); + + /** Create a multi range with exactly one containing range + */ + B2DPolyRange( const B2DPolyRange& ); + B2DPolyRange& operator=( const B2DPolyRange& ); + + bool operator==(const B2DPolyRange&) const; + bool operator!=(const B2DPolyRange&) const; + + /// Number of included ranges + sal_uInt32 count() const; + + ElementType getElement(sal_uInt32 nIndex) const; + + // insert/append a single range + void appendElement(const B2DRange& rRange, B2VectorOrientation eOrient); + + void clear(); + + /** Test whether given range overlaps one or more of the + included ranges. Does *not* use overall range, but checks + individually. + */ + bool overlaps( const B2DRange& rRange ) const; + + /** Request a poly-polygon with solved cross-overs + */ + B2DPolyPolygon solveCrossovers() const; + + void transform(const B2DHomMatrix& rTranslate); + + private: + o3tl::cow_wrapper< ImplB2DPolyRange > mpImpl; + }; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |