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/*
Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2006 Rob Buis <buis@kde.org>
This file is part of the KDE project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "wtf/Platform.h"
#if ENABLE(SVG)
#include "SVGAngle.h"
#include <math.h>
#include <wtf/MathExtras.h>
namespace WebCore {
SVGAngle::SVGAngle()
: RefCounted<SVGAngle>(0)
, m_unitType(SVG_ANGLETYPE_UNKNOWN)
, m_value(0)
, m_valueInSpecifiedUnits(0)
{
}
SVGAngle::~SVGAngle()
{
}
SVGAngle::SVGAngleType SVGAngle::unitType() const
{
return m_unitType;
}
void SVGAngle::setValue(float value)
{
m_value = value;
}
float SVGAngle::value() const
{
return m_value;
}
// calc m_value
void SVGAngle::calculate()
{
if (m_unitType == SVG_ANGLETYPE_GRAD)
m_value = grad2deg(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_RAD)
m_value = rad2deg(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_UNSPECIFIED || m_unitType == SVG_ANGLETYPE_DEG)
m_value = m_valueInSpecifiedUnits;
}
void SVGAngle::setValueInSpecifiedUnits(float valueInSpecifiedUnits)
{
m_valueInSpecifiedUnits = valueInSpecifiedUnits;
calculate();
}
float SVGAngle::valueInSpecifiedUnits() const
{
return m_valueInSpecifiedUnits;
}
void SVGAngle::setValueAsString(const String& s)
{
m_valueAsString = s;
bool bOK;
m_valueInSpecifiedUnits = m_valueAsString.toFloat(&bOK);
m_unitType = SVG_ANGLETYPE_UNSPECIFIED;
if (!bOK) {
if (m_valueAsString.endsWith("deg"))
m_unitType = SVG_ANGLETYPE_DEG;
else if (m_valueAsString.endsWith("grad"))
m_unitType = SVG_ANGLETYPE_GRAD;
else if (m_valueAsString.endsWith("rad"))
m_unitType = SVG_ANGLETYPE_RAD;
}
calculate();
}
String SVGAngle::valueAsString() const
{
m_valueAsString = String::number(m_valueInSpecifiedUnits);
switch (m_unitType) {
case SVG_ANGLETYPE_UNSPECIFIED:
case SVG_ANGLETYPE_DEG:
m_valueAsString += "deg";
break;
case SVG_ANGLETYPE_RAD:
m_valueAsString += "rad";
break;
case SVG_ANGLETYPE_GRAD:
m_valueAsString += "grad";
break;
case SVG_ANGLETYPE_UNKNOWN:
break;
}
return m_valueAsString;
}
void SVGAngle::newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits)
{
m_unitType = (SVGAngleType)unitType;
m_valueInSpecifiedUnits = valueInSpecifiedUnits;
calculate();
}
void SVGAngle::convertToSpecifiedUnits(unsigned short unitType)
{
if (m_unitType == unitType)
return;
if (m_unitType == SVG_ANGLETYPE_DEG && unitType == SVG_ANGLETYPE_RAD)
m_valueInSpecifiedUnits = deg2rad(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_GRAD && unitType == SVG_ANGLETYPE_RAD)
m_valueInSpecifiedUnits = grad2rad(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_DEG && unitType == SVG_ANGLETYPE_GRAD)
m_valueInSpecifiedUnits = deg2grad(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_RAD && unitType == SVG_ANGLETYPE_GRAD)
m_valueInSpecifiedUnits = rad2grad(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_RAD && unitType == SVG_ANGLETYPE_DEG)
m_valueInSpecifiedUnits = rad2deg(m_valueInSpecifiedUnits);
else if (m_unitType == SVG_ANGLETYPE_GRAD && unitType == SVG_ANGLETYPE_DEG)
m_valueInSpecifiedUnits = grad2deg(m_valueInSpecifiedUnits);
m_unitType = (SVGAngleType)unitType;
}
// Helpers
double SVGAngle::todeg(double rad)
{
return rad2deg(rad);
}
double SVGAngle::torad(double deg)
{
return deg2rad(deg);
}
double SVGAngle::shortestArcBisector(double angle1, double angle2)
{
double bisector = (angle1 + angle2) / 2;
if (fabs(angle1 - angle2) > 180)
bisector += 180;
return bisector;
}
}
#endif // ENABLE(SVG)
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