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+/* -*- 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_VCL_INC_REGBAND_HXX
+#define INCLUDED_VCL_INC_REGBAND_HXX
+
+/*
+
+class ImplRegionBand
+
+This class handles one y-band of the region. In this band may contain one
+or more separations in x-direction. The y-Band do not contain any
+separation after creation.
+
+The separations are modified with basic clipping functions like Union and
+Intersection - the Class will process the clipping for the actual band.
+
+*/
+
+// element for the list with x-separations
+struct ImplRegionBandSep
+{
+ ImplRegionBandSep* mpNextSep;
+ tools::Long mnXLeft;
+ tools::Long mnXRight;
+ bool mbRemoved;
+};
+
+enum class LineType { Ascending, Descending };
+
+// element for the list with x-separations
+struct ImplRegionBandPoint
+{
+ ImplRegionBandPoint* mpNextBandPoint;
+ tools::Long mnX;
+ tools::Long mnLineId;
+ bool mbEndPoint;
+ LineType meLineType;
+};
+
+class ImplRegionBand
+{
+public:
+ ImplRegionBand* mpNextBand; // pointer to the next element of the list
+ ImplRegionBand* mpPrevBand; // pointer to the previous element of the list (only used temporarily)
+ ImplRegionBandSep* mpFirstSep; // root of the list with x-separations
+ ImplRegionBandPoint* mpFirstBandPoint; // root of the list with lines
+ tools::Long mnYTop; // actual boundary of the band
+ tools::Long mnYBottom;
+
+ bool mbTouched : 1;
+
+ // create y-band with boundaries
+ ImplRegionBand( tools::Long nYTop, tools::Long nYBottom );
+ /** copy y-band with all data
+ @param theSourceBand
+ The new ImplRegionBand object will
+ be a copy of this band.
+ @param bIgnorePoints
+ When true (the default) the
+ band points pointed to by
+ mpFirstBandPoint are not copied.
+ When false they are copied.
+ You need the points when you are
+ planning to call ProcessPoints()
+ later on.
+ */
+ ImplRegionBand( const ImplRegionBand & theSourceBand,
+ const bool bIgnorePoints = true);
+ ~ImplRegionBand();
+
+ tools::Long GetXLeftBoundary() const;
+ tools::Long GetXRightBoundary() const;
+
+ // combine overlapping bands
+ void OptimizeBand();
+
+ // generate separations from lines and process
+ // union with existing separations
+ void ProcessPoints();
+ // insert point in the list for later processing
+ bool InsertPoint( tools::Long nX, tools::Long nLineID,
+ bool bEndPoint, LineType eLineType );
+
+ void Union( tools::Long nXLeft, tools::Long nXRight );
+ void Intersect( tools::Long nXLeft, tools::Long nXRight );
+ void Exclude( tools::Long nXLeft, tools::Long nXRight );
+ void XOr( tools::Long nXLeft, tools::Long nXRight );
+
+ void MoveX( tools::Long nHorzMove );
+ void ScaleX( double fHorzScale );
+
+ bool Contains( tools::Long nX );
+
+ bool IsEmpty() const { return ((!mpFirstSep) && (!mpFirstBandPoint)); }
+
+ bool operator==( const ImplRegionBand& rRegionBand ) const;
+
+ /** Split the called band at the given vertical coordinate. After the
+ split the called band will cover the upper part not including nY.
+ The new band will cover the lower part including nY.
+ @param nY
+ The band is split at this y coordinate. The new, lower band
+ will include this very value.
+ @return
+ Returns the new, lower band.
+ */
+ ImplRegionBand* SplitBand (const sal_Int32 nY);
+};
+
+#endif // INCLUDED_VCL_INC_REGBAND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */