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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _SV_REGBAND_HXX
#define _SV_REGBAND_HXX
#include <tools/solar.h>
#include <tools/poly.hxx>
/* =======================================================================
class ImplRegionBand
This class handles one y-band of the region. In this band may contain one
or more seprarations 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.
The actual separations may be checked by functions like IsInside or
IsOver.
======================================================================= */
// ------------------------
// - ImplRegionBand-Types -
// ------------------------
// element for the list with x-separations
struct ImplRegionBandSep
{
ImplRegionBandSep* mpNextSep;
long mnXLeft;
long mnXRight;
sal_Bool mbRemoved;
};
enum LineType { LINE_ASCENDING, LINE_DESCENDING, LINE_HORIZONTAL };
// element for the list with x-separations
struct ImplRegionBandPoint
{
ImplRegionBandPoint* mpNextBandPoint;
long mnX;
long mnLineId;
sal_Bool mbEndPoint;
LineType meLineType;
};
// ------------------
// - ImplRegionBand -
// ------------------
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 temporaery)
ImplRegionBandSep* mpFirstSep; // root of the list with x-separations
ImplRegionBandPoint* mpFirstBandPoint; // root of the list with lines
long mnYTop; // actual boundary of the band
long mnYBottom;
sal_Bool mbTouched;
// create y-band with boundaries
ImplRegionBand( long nYTop, long nYBottom );
/** copy y-band with 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();
long GetXLeftBoundary() const;
long GetXRightBoundary() const;
// combine overlapping bands
sal_Bool OptimizeBand();
// generate separations from lines and process
// union with existing separations
void ProcessPoints();
// insert point in the list for later processing
sal_Bool InsertPoint( long nX, long nLineID,
sal_Bool bEndPoint, LineType eLineType );
void Union( long nXLeft, long nXRight );
void Intersect( long nXLeft, long nXRight );
void Exclude( long nXLeft, long nXRight );
void XOr( long nXLeft, long nXRight );
void MoveX( long nHorzMove );
void ScaleX( double fHorzScale );
sal_Bool IsInside( long nX );
sal_Bool IsEmpty() const { return ((!mpFirstSep) && (!mpFirstBandPoint)); }
sal_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 // _SV_REGBAND_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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