using System;
using iTextSharp.text;

/*
 * $Id: DefaultSplitCharacter.cs 106 2009-12-07 12:23:50Z psoares33 $
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.pdf {

    /**
 * The default class that is used to determine whether or not a character
 * is a split character. You can subclass this class to define your own
 * split characters.
 * @since	2.1.2
 */
    public class DefaultSplitCharacter : ISplitCharacter {
	
        /**
         * An instance of the default SplitCharacter.
         */
        public static readonly ISplitCharacter DEFAULT = new DefaultSplitCharacter();
	
        /**
         * Checks if a character can be used to split a <CODE>PdfString</CODE>.
         * <P>
         * for the moment every character less than or equal to SPACE, the character '-'
         * and some specific unicode ranges are 'splitCharacters'.
         * 
         * @param start start position in the array
         * @param current current position in the array
         * @param end end position in the array
         * @param	cc		the character array that has to be checked
         * @param ck chunk array
         * @return	<CODE>true</CODE> if the character can be used to split a string, <CODE>false</CODE> otherwise
         */
        public bool IsSplitCharacter(int start, int current, int end, char[] cc, PdfChunk[] ck) {
            char c = GetCurrentCharacter(current, cc, ck);
            if (c <= ' ' || c == '-' || c == '\u2010') {
                return true;
            }
            if (c < 0x2002)
                return false;
            return ((c >= 0x2002 && c <= 0x200b)
                || (c >= 0x2e80 && c < 0xd7a0)
                || (c >= 0xf900 && c < 0xfb00)
                || (c >= 0xfe30 && c < 0xfe50)
                || (c >= 0xff61 && c < 0xffa0));
        }

        /**
         * Returns the current character
         * @param current current position in the array
         * @param	cc		the character array that has to be checked
         * @param ck chunk array
         * @return	the current character
         */
        protected char GetCurrentCharacter(int current, char[] cc, PdfChunk[] ck) {
            if (ck == null) {
                return (char)cc[current];
            }
            return (char)ck[Math.Min(current, ck.Length - 1)].GetUnicodeEquivalent(cc[current]);
        }
    }
}
