/*
 * [HTMLTouchUp.java]
 *
 * Summary: Embeds <br> and <p> entities in HTML output.
 *
 * Copyright: (c) 2002-2017 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:
 *  4.5 2009-02-26 add both Java string quoting and plain for Java search/regexes.
 */
package com.mindprod.quoter;

/**
 * Embeds <br> and <p> entities in HTML output.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 4.5 2009-02-26 add both Java string quoting and plain for Java search/regexes.
 * @since 2002-06-19
 */
final class HTMLTouchUp extends TextProcessor
    {
    /**
     * Embeds
     * <p/>
     * chars in HTML output.
     *
     * @param raw text to be tidied
     *
     * @return String representing the cooked output
     */
    public String process( String raw )
        {
        assert raw != null : "HTMLTouchUp.process raw must not be null";
        // We are processing the entire clipboard in one fell swoop
        // not just one line of it.
        // check for runs of blank lines, convert to new paragraph
        int pendingNlCount = 0;
        StringBuilder result =
                new StringBuilder( raw.length() + raw.length() / 4 );
        result.append( "<p>" );
        for ( int i = 0; i < raw.length(); i++ )
            {
            char c = raw.charAt( i );
            if ( c == '\n' )
                {
                pendingNlCount++;
                }
            else
                {
                switch ( pendingNlCount )
                    {
                    case 0:
                        /* do nothing */
                        break;
                    case 1:
                        result.append( "\n<br>\n" );
                        break;
                    default:
                        /* treat 3 or more like 2 */
                    case 2:
                        result.append( "</p>\n<p>" );
                        break;
                    }
                pendingNlCount = 0;
                result.append( c );
                }
            } // end for
        result.append( "</p>\n" );
        return result.toString();
        } // end process
    }