/**
* Get comment, but no more than a maximum number of characters.
*
* @return Start of comment, with ellipses appended if trunceted; null, if node has no comment.
*/
public static String getCommentStart(ConstNode node, boolean firstLineOnly, int maxChar) {
String comment = node.getComment();
if (comment == null) return null;
boolean trimmed = false;
if (firstLineOnly) {
int pos = comment.indexOf("\n");
if (pos >= 0) {
comment = comment.substring(0, pos);
trimmed = true;
}
}
if (comment.length() > maxChar) {
comment = comment.substring(0, maxChar);
trimmed = true;
}
if (trimmed) {
if (maxChar > 30) {
// Try to find a cut-off at a space
int pos = comment.lastIndexOf(' ');
if (pos > 20) {
if (comment.charAt(pos) == '.') --pos;
comment = comment.substring(0, pos);
}
}
comment = comment + "...";
}
return comment;
}
/**
* Check if the comment of the current node contains a pattern.
*
* @param node The node to check.
* @param pattern The pattern.
* @return <tt>true</tt>, if the current node has a comment and a match for the pattern is found
* in the comment.
*/
public static boolean commentContains(ConstNode node, Pattern pattern) {
String comment = node.getComment();
return (comment != null && pattern.matcher(comment).find());
}
