001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019/**
020 * Implements the CFML Function cjustify
021 */
022package lucee.runtime.functions.string;
023
024import lucee.runtime.PageContext;
025import lucee.runtime.exp.ExpressionException;
026import lucee.runtime.exp.FunctionException;
027import lucee.runtime.exp.PageException;
028import lucee.runtime.functions.BIF;
029import lucee.runtime.op.Caster;
030
031public final class CJustify extends BIF {
032
033        private static final long serialVersionUID = -4145093552477680411L;
034
035        public static String call(PageContext pc , String string, double length) throws ExpressionException {
036                int len=(int)length;
037                if(len<1) throw new ExpressionException("Parameter 2 of function cJustify which is now ["+len+"] must be a non-negative integer");
038                else if((len-=string.length())<=0) return string;
039                else {
040                        
041                        char[] chrs=new char[string.length()+len];
042                        int part=len/2;
043                        
044                        for(int i=0;i<part;i++)chrs[i]=' '; 
045                        for(int i=string.length()-1;i>=0;i--)chrs[part+i]=string.charAt(i); 
046                        for(int i=part+string.length();i<chrs.length;i++)chrs[i]=' '; 
047                        
048                        return new String(chrs);
049                }
050        }
051
052    @Override
053        public Object invoke(PageContext pc, Object[] args) throws PageException {
054                if(args.length==2)
055                        return call(pc, Caster.toString(args[0]), Caster.toDoubleValue(args[1]));
056                throw new FunctionException(pc, "CJustify", 2, 2, args.length);
057        }
058}
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