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package ext.plantuml.com.ctreber.acearth.util;
import java.util.HashSet;
import java.util.StringTokenizer;
/**
* Some tools.
*
*
© 2002 Christian Treber, [email protected]
* @author Christian Treber, [email protected]
*
*/
public class Toolkit
{
public static final double TWOPI = Math.PI * 2;
public static final double PI = Math.PI;
public static final double HALFPI = Math.PI / 2;
private static final HashSet fsNoCap;
static
{
fsNoCap = new HashSet();
fsNoCap.add("a");
fsNoCap.add("as");
fsNoCap.add("to");
fsNoCap.add("of");
fsNoCap.add("the");
fsNoCap.add("off");
fsNoCap.add("and");
fsNoCap.add("mid");
}
public static double degsToRads(double pDegrees)
{
return pDegrees * TWOPI / 360;
}
public static double radsToDegs(double pRadians)
{
return pRadians * 360 / TWOPI;
}
/**
* Force an angular value into the range [-PI, +PI]
*/
public static double limitRads(double x)
{
return fmod(x, -Math.PI, Math.PI);
}
/**
*
Verified.
*/
public static double fmod(double pValue, double pMod)
{
while(pValue < 0)
{
pValue += pMod;
}
while(pValue > pMod)
{
pValue -= pMod;
}
return pValue;
}
/**
*
Examples: min -2, max 2: range 4
*
*
* - value 1: lFact = 0
*
- value 3: lFact = 1, value -1
*
- value 9: lFact = 2, value 1
*
- value -3: lFact = -1, value 1
*
*/
public static double fmod(double pValue, double pMinValue, double pMaxValue)
{
final double lRange = pMaxValue - pMinValue;
int lFact = (int)((pValue - pMinValue) / lRange);
if(pValue < pMinValue)
{
lFact--;
}
return pValue - lFact * lRange;
}
/**
* Capitalize String. Uppercase words smaller/equal than 3 chars,
* lowercase defined exceptions. Capitalize within word after '.' and '-'.
* Capitalize all others.
*/
public static String intelligentCapitalize(String pText)
{
boolean lDoCap = false;
final StringTokenizer lST = new StringTokenizer(pText, ".- ", true);
final StringBuilder lSB = new StringBuilder(50);
while(lST.hasMoreTokens())
{
String lWord = lST.nextToken();
if(lWord.equals(".") || lWord.equals("-"))
{
lDoCap = true;
lSB.append(lWord);
continue;
}
if(lWord.equals(" "))
{
lDoCap = false;
lSB.append(lWord);
continue;
}
if(lDoCap || (lWord.length() > 3))
{
lSB.append(Character.toUpperCase(lWord.charAt(0)));
lSB.append(lWord.substring(1).toLowerCase());
} else
{
if(fsNoCap.contains(lWord.toLowerCase()))
{
lSB.append(lWord.toLowerCase());
} else
{
lSB.append(lWord.toUpperCase());
}
}
}
return lSB.toString();
}
}