package org.jabref.logic.layout.format;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jabref.logic.layout.LayoutFormatter;
/**
* Will interpret two consecutive newlines as the start of a new paragraph and thus
* wrap the paragraph in HTML-p-tags.
*/
public class HTMLParagraphs implements LayoutFormatter {
private static final Pattern BEFORE_NEW_LINES_PATTERN = Pattern.compile("(.*?)\\n\\s*\\n");
@Override
public String format(String fieldText) {
if (fieldText == null) {
return fieldText;
}
String trimmedFieldText = fieldText.trim();
if (trimmedFieldText.isEmpty()) {
return trimmedFieldText;
}
Matcher m = HTMLParagraphs.BEFORE_NEW_LINES_PATTERN.matcher(trimmedFieldText);
StringBuffer s = new StringBuffer();
while (m.find()) {
String middle = m.group(1).trim();
if (!middle.isEmpty()) {
s.append("<p>\n");
m.appendReplacement(s, m.group(1));
s.append("\n</p>\n");
}
}
s.append("<p>\n");
m.appendTail(s);
s.append("\n</p>");
return s.toString();
}
}