/*
 * [CSSCharCategory.java]
 *
 * Summary: top level enum to define the categories of character for the PropTokenizer.
 *
 * Copyright: (c) 2004-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  3.1 2009-04-12 shorter style names, improved highlighting.
 */
package com.mindprod.jprep;

/**
 * top level enum to define the categories of character for the PropTokenizer.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 3.1 2009-04-12 shorter style names, improved highlighting.
 * @since 2004-05-15
 */
@SuppressWarnings( { "EnumeratedConstantNamingConvention" } )
public enum CSSCharCategory
    {
        BANG,
        CLOSE_BRACE,
        COLON,
        COMMA,
        /**
         * End of line character
         */
        EOL,
        /**
         * ignore control chars,  BOM
         */
        IGNORE,
        OPEN_BRACE,
        /**
         * operators you can use in a selector
         */
        SELECTOR_OPERATOR,
        /**
         * ordinary chars inculding punct and digits
         */
        ORDINARY,
        /**
         * high ascii ` and chars not used in bat language
         */
        OTHER,
        PERCENT,
        QUOTE,
        SEMICOLON,
        SLASH,
        STAR,
        WHITESPACE  /* not including EOL */;

    /**
     * Categorise one character
     *
     * @param theChar character to categorise
     *
     * @return category code, e.g. PLAIN QUOTE
     */
    static CSSCharCategory
    categorise( char theChar )
        {
        switch ( theChar )
            {
            case '!':
                return BANG;
            case '}':
                return CLOSE_BRACE;
            case ':':
                return COLON;
            case ',':
                return COMMA;
            case '\n':
                return EOL;
            case '\r':
            case 127:
            case 0xfeff: /* bom */
            case 0xfffd: /* replaced bom */
                return IGNORE;
            case '{':
                return OPEN_BRACE;
            case '>':
            case '+':
                return SELECTOR_OPERATOR;
            case '%':
                return PERCENT;
            case '\"':
                return QUOTE;
            case ';':
                return SEMICOLON;
            case '/':
                return SLASH;
            case '*':
                return STAR;
            case ' ':
            case '\t':
            case 0xa0://  
                return WHITESPACE;
            default:
                if ( 0 <= theChar && theChar <= 31 )
                    {
                    return IGNORE;
                    }
                else if ( ' ' <= theChar && theChar <= '~' )
                    {
                    return ORDINARY;
                    }
                else
                    {
                    return OTHER;
                    }
            } // end switch
        } // end categorise
    }