328 lines
14 KiB
C++
328 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SVX_SVDTRANS_HXX
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#define INCLUDED_SVX_SVDTRANS_HXX
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#include <rtl/ustring.hxx>
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#include <sal/log.hxx>
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#include <svx/svxdllapi.h>
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#include <tools/fract.hxx>
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#include <tools/gen.hxx>
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#include <tools/poly.hxx>
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#include <vcl/field.hxx>
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#include <vcl/mapmod.hxx>
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// The DrawingEngine's angles are specified in 1/100th degrees
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// We need to convert these angles to radians, in order to be able
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// to process them with trigonometric functions.
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// This is done, using the constant nPi180.
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//
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// Example usage:
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// nAngle ... is an angle in 1/100 Deg
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//
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// Which is converted, by this:
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// double nSin=sin(nAngle*nPi180);
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//
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// To convert it back, we use division.
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const double nPi=3.14159265358979323846;
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const double nPi180=0.000174532925199432957692222; // If we have too few digits, we get tan(4500*nPi180)!=1.0
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// That maximum shear angle
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#define SDRMAXSHEAR 8900
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class XPolygon;
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class XPolyPolygon;
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inline long Round(double a) { return a>0.0 ? (long)(a+0.5) : -(long)((-a)+0.5); }
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inline void MoveRect(Rectangle& rRect, const Size& S) { rRect.Move(S.Width(),S.Height()); }
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inline void MovePoint(Point& rPnt, const Size& S) { rPnt.X()+=S.Width(); rPnt.Y()+=S.Height(); }
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inline void MovePoly(tools::Polygon& rPoly, const Size& S) { rPoly.Move(S.Width(),S.Height()); }
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void MoveXPoly(XPolygon& rPoly, const Size& S);
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SVX_DLLPUBLIC void ResizeRect(Rectangle& rRect, const Point& rRef, const Fraction& xFact, const Fraction& yFact, bool bNoJustify = false);
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inline void ResizePoint(Point& rPnt, const Point& rRef, Fraction xFact, Fraction yFact);
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void ResizePoly(tools::Polygon& rPoly, const Point& rRef, const Fraction& xFact, const Fraction& yFact);
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void ResizeXPoly(XPolygon& rPoly, const Point& rRef, const Fraction& xFact, const Fraction& yFact);
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inline void RotatePoint(Point& rPnt, const Point& rRef, double sn, double cs);
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SVX_DLLPUBLIC void RotatePoly(tools::Polygon& rPoly, const Point& rRef, double sn, double cs);
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void RotateXPoly(XPolygon& rPoly, const Point& rRef, double sn, double cs);
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void RotateXPoly(XPolyPolygon& rPoly, const Point& rRef, double sn, double cs);
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void MirrorPoint(Point& rPnt, const Point& rRef1, const Point& rRef2);
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void MirrorXPoly(XPolygon& rPoly, const Point& rRef1, const Point& rRef2);
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inline void ShearPoint(Point& rPnt, const Point& rRef, double tn, bool bVShear = false);
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SVX_DLLPUBLIC void ShearPoly(tools::Polygon& rPoly, const Point& rRef, double tn, bool bVShear = false);
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void ShearXPoly(XPolygon& rPoly, const Point& rRef, double tn, bool bVShear = false);
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/**
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* rPnt.X/rPnt.Y is set to rCenter.X or rCenter.Y!
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* We then only need to rotate rPnt by rCenter.
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*
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* @return the returned angle is in rad
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*/
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inline double GetCrookAngle(Point& rPnt, const Point& rCenter, const Point& rRad, bool bVertical);
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/**
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* The following methods accept a point of an XPolygon, whereas the neighbouring
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* control points of the actual point are passed in pC1/pC2.
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* Via rSin/rCos, sin(nAngle) and cos(nAngle) are returned.
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*
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* @return the returned angle is in rad
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*/
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double CrookRotateXPoint(Point& rPnt, Point* pC1, Point* pC2, const Point& rCenter,
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const Point& rRad, double& rSin, double& rCos, bool bVert);
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double CrookSlantXPoint(Point& rPnt, Point* pC1, Point* pC2, const Point& rCenter,
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const Point& rRad, double& rSin, double& rCos, bool bVert);
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double CrookStretchXPoint(Point& rPnt, Point* pC1, Point* pC2, const Point& rCenter,
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const Point& rRad, double& rSin, double& rCos, bool bVert,
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const Rectangle& rRefRect);
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void CrookRotatePoly(XPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert);
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void CrookSlantPoly(XPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert);
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void CrookStretchPoly(XPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert, const Rectangle& rRefRect);
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void CrookRotatePoly(XPolyPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert);
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void CrookSlantPoly(XPolyPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert);
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void CrookStretchPoly(XPolyPolygon& rPoly, const Point& rCenter, const Point& rRad, bool bVert, const Rectangle& rRefRect);
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/**************************************************************************************************/
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/* Inline */
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/**************************************************************************************************/
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inline void ResizePoint(Point& rPnt, const Point& rRef, Fraction xFact, Fraction yFact)
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{
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if (!xFact.IsValid()) {
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SAL_WARN( "svx.svdraw", "invalid fraction xFact, using Fraction(1,1)" );
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xFact = Fraction(1,1);
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}
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if (!yFact.IsValid()) {
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SAL_WARN( "svx.svdraw", "invalid fraction yFact, using Fraction(1,1)" );
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yFact = Fraction(1,1);
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}
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rPnt.X() = rRef.X() + Round( (rPnt.X() - rRef.X()) * double(xFact) );
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rPnt.Y() = rRef.Y() + Round( (rPnt.Y() - rRef.Y()) * double(yFact) );
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}
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inline void RotatePoint(Point& rPnt, const Point& rRef, double sn, double cs)
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{
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long dx=rPnt.X()-rRef.X();
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long dy=rPnt.Y()-rRef.Y();
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rPnt.X()=Round(rRef.X()+dx*cs+dy*sn);
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rPnt.Y()=Round(rRef.Y()+dy*cs-dx*sn);
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}
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inline void ShearPoint(Point& rPnt, const Point& rRef, double tn, bool bVShear)
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{
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if (!bVShear) { // Horizontal
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if (rPnt.Y()!=rRef.Y()) { // else not needed
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rPnt.X()-=Round((rPnt.Y()-rRef.Y())*tn);
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}
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} else { // or else vertical
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if (rPnt.X()!=rRef.X()) { // else not needed
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rPnt.Y()-=Round((rPnt.X()-rRef.X())*tn);
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}
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}
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}
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inline double GetCrookAngle(Point& rPnt, const Point& rCenter, const Point& rRad, bool bVertical)
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{
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double nAngle;
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if (bVertical) {
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long dy=rPnt.Y()-rCenter.Y();
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nAngle=(double)dy/(double)rRad.Y();
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rPnt.Y()=rCenter.Y();
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} else {
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long dx=rCenter.X()-rPnt.X();
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nAngle=(double)dx/(double)rRad.X();
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rPnt.X()=rCenter.X();
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}
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return nAngle;
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}
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/**************************************************************************************************/
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/**************************************************************************************************/
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/**
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* The Y axis points down!
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* The function negates the Y axis, when calculating the angle, such
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* that GetAngle(Point(0,-1))=90 deg.
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* GetAngle(Point(0,0)) returns 0.
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*
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* @return the returned value is in the range of -180.00..179.99 deg
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* and is in 1/100 deg units
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*/
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SVX_DLLPUBLIC long GetAngle(const Point& rPnt);
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long NormAngle180(long a); /// Normalize angle to -180.00..179.99
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SVX_DLLPUBLIC long NormAngle360(long a); /// Normalize angle to 0.00..359.99
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sal_uInt16 GetAngleSector(long nAngle); /// Determine sector within the cartesian coordinate system
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/**
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* Calculates the length of (0,0) via a^2 + b^2 = c^2
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* In order to avoid overflows, we ignore some decimal places.
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*/
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long GetLen(const Point& rPnt);
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/**
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* The transformation of a rectangle into a polygon, by
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* using angle parameters from GeoStat. ------------
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* The point of reference is always the Point 0, meaning /1 2/
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* the upper left corner of the initial rectangle. / /
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* When calculating the polygon, the order is first / /
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* shear and then the rotation. / /
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* / / \
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* / / |
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* A) Initial rectangle aRect B) After applying Shear /0 3/ Rot|
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* +------------------+ -------------------- ------------------
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* |0 1| \0 1\ C) After applying Rotate
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* | | \ \
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* | | | \ \
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* |3 2| | \3 2\
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* +------------------+ | --------------------
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* |Shr
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*
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* When converting the polygon back into a rect, the order is necessarily the
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* other way around:
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* - Calculating the rotation angle: angle of the line 0-1 in figure C) to the horizontal
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* - Turning the sheared rect back (we get figure B)
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* - Determining the width of the rect = length of the line 0-1 in figure B)
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* - Determining the height of the rect = vertical distance between the points 0 and 3
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* of figure B)
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* - Determining the shear angle from the line 0-3 to the perpendicular line.
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*
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* We need to keep in mind that the polygon can be mirrored when it was
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* transformed in the mean time (e.g. mirror or resize with negative factor).
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* In that case, we first need to normalize, by swapping points (0 with 3 and 1
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* with 2), so that it has the right orientation.
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*
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* Note: a positive shear angle means a shear with a positive visible curvature
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* on the screen. Mathematically, that would be a negative curvature, as the
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* Y axis runs from top to bottom on the screen.
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* Rotation angle: positive means a visible left rotation.
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*/
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class GeoStat { // Geometric state for a rect
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public:
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long nRotationAngle;
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long nShearAngle;
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double nTan; // tan(nShearAngle)
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double nSin; // sin(nRotationAngle)
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double nCos; // cos(nRotationAngle)
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bool bMirrored; // Horizontally mirrored? (ni)
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public:
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GeoStat(): nRotationAngle(0),nShearAngle(0),nTan(0.0),nSin(0.0),nCos(1.0),bMirrored(false) {}
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void RecalcSinCos();
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void RecalcTan();
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};
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tools::Polygon Rect2Poly(const Rectangle& rRect, const GeoStat& rGeo);
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void Poly2Rect(const tools::Polygon& rPol, Rectangle& rRect, GeoStat& rGeo);
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SVX_DLLPUBLIC void OrthoDistance8(const Point& rPt0, Point& rPt, bool bBigOrtho);
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SVX_DLLPUBLIC void OrthoDistance4(const Point& rPt0, Point& rPt, bool bBigOrtho);
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// Multiplication and subsequent division
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// Calculation and intermediate values are in BigInt
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SVX_DLLPUBLIC long BigMulDiv(long nVal, long nMul, long nDiv);
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class FrPair {
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Fraction aX;
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Fraction aY;
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public:
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FrPair() : aX(0,1),aY(0,1) {}
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FrPair(const Fraction& rBoth) : aX(rBoth),aY(rBoth) {}
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FrPair(const Fraction& rX, const Fraction& rY) : aX(rX),aY(rY) {}
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FrPair(long nMul, long nDiv) : aX(nMul,nDiv),aY(nMul,nDiv) {}
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FrPair(long xMul, long xDiv, long yMul, long yDiv): aX(xMul,xDiv),aY(yMul,yDiv) {}
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const Fraction& X() const { return aX; }
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const Fraction& Y() const { return aY; }
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Fraction& X() { return aX; }
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Fraction& Y() { return aY; }
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};
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// To convert units of measurement
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SVX_DLLPUBLIC FrPair GetMapFactor(MapUnit eS, MapUnit eD);
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FrPair GetMapFactor(FieldUnit eS, FieldUnit eD);
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inline bool IsMetric(MapUnit eU) {
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return (eU==MAP_100TH_MM || eU==MAP_10TH_MM || eU==MAP_MM || eU==MAP_CM);
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}
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inline bool IsInch(MapUnit eU) {
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return (eU==MAP_1000TH_INCH || eU==MAP_100TH_INCH || eU==MAP_10TH_INCH || eU==MAP_INCH ||
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eU==MAP_POINT || eU==MAP_TWIP);
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}
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inline bool IsMetric(FieldUnit eU) {
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return (eU==FUNIT_MM || eU==FUNIT_CM || eU==FUNIT_M || eU==FUNIT_KM || eU==FUNIT_100TH_MM);
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}
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inline bool IsInch(FieldUnit eU) {
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return (eU==FUNIT_TWIP || eU==FUNIT_POINT || eU==FUNIT_PICA ||
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eU==FUNIT_INCH || eU==FUNIT_FOOT || eU==FUNIT_MILE);
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}
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class SVX_DLLPUBLIC SdrFormatter {
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long nMul_;
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long nDiv_;
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short nKomma_;
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bool bSrcFU;
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bool bDstFU;
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bool bDirty;
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MapUnit eSrcMU;
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MapUnit eDstMU;
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FieldUnit eSrcFU;
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FieldUnit eDstFU;
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private:
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SVX_DLLPRIVATE void Undirty();
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SVX_DLLPRIVATE void ForceUndirty() const { if (bDirty) const_cast<SdrFormatter*>(this)->Undirty(); }
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public:
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SdrFormatter(MapUnit eSrc, MapUnit eDst)
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: nMul_(0)
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, nDiv_(0)
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, nKomma_(0)
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, bSrcFU(false)
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, bDstFU(false)
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, bDirty(true)
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, eSrcMU(eSrc)
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, eDstMU(eDst)
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, eSrcFU(FUNIT_NONE)
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, eDstFU(FUNIT_NONE)
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{
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}
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SdrFormatter(MapUnit eSrc, FieldUnit eDst) { eSrcMU=eSrc; bSrcFU=false; eDstFU=eDst; bDstFU=true; bDirty=true; }
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SdrFormatter(FieldUnit eSrc, MapUnit eDst) { eSrcFU=eSrc; bSrcFU=true; eDstMU=eDst; bDstFU=false; bDirty=true; }
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SdrFormatter(FieldUnit eSrc, FieldUnit eDst) { eSrcFU=eSrc; bSrcFU=true; eDstFU=eDst; bDstFU=true; bDirty=true; }
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void TakeStr(long nVal, OUString& rStr) const;
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static void TakeUnitStr(MapUnit eUnit, OUString& rStr);
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static void TakeUnitStr(FieldUnit eUnit, OUString& rStr);
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static OUString GetUnitStr(FieldUnit eUnit) { OUString aStr; TakeUnitStr(eUnit,aStr); return aStr; }
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};
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#endif // INCLUDED_SVX_SVDTRANS_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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