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Asciidoc preprocessor extension

There is a newer version: 2.8.2

package javax0.jamal.asciidoc;

import java.util.ArrayList;
import java.util.List;

/**
 * This is a "default" converter that converts TEXT files. This is not an implementation of the {@link Converter}
 * interface.
 */
public class TextConverter {
    public static List convert(final String fileName, final List original) {
        final var outputFileName = fileName.substring(0, fileName.length() - ".jam".length());
        final var innerExt = outputFileName.lastIndexOf('.');
        final String type;
        if (innerExt == -1) {
            type = "";
        } else {
            type = outputFileName.substring(innerExt + 1);
        }
        final var sourcedLines = new ArrayList();
        if (type.length() > 0) {
            sourcedLines.add("[source," + type + "]");
        } else {
            sourcedLines.add("[source]");
        }
        return convertText(original, sourcedLines);
    }

    public static List convertText(final List original, final ArrayList sourcedLines) {
        sourcedLines.add("----");
        for (final var line : original) {
            final var trimmed = line.trim();
            if (trimmed.length() == 0) {
                // add an invisible space so that empty lines at the start and at the end will be displayed
                sourcedLines.add("\u200B");
            } else if (trimmed.equals("----")) {
                // add an invisible space that will fool asciidoctor not to end the source block
                sourcedLines.add(line.replaceAll("----", "----\u200B"));
            } else {
                sourcedLines.add(line);
            }
        }
        sourcedLines.add("----");
        return sourcedLines;
    }
}