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package jdk.nashorn.api.tree;


Provides methods to convert between character positions and line numbers
for a compilation unit.

Since:9
/**
 * Provides methods to convert between character positions and line numbers
 * for a compilation unit.
 *
 * @since 9
 */
public interface LineMap {
    
Find the line containing a position; a line termination
character is on the line it terminates.

Params:
  • pos –  character offset of the position
Returns:the line number of pos (first line is 1)
/**
     * Find the line containing a position; a line termination
     * character is on the line it terminates.
     *
     * @param   pos  character offset of the position
     * @return the line number of pos (first line is 1)
     */
    long getLineNumber(long pos);

    
Find the column for a character position.
Tab characters preceding the position on the same line
will be expanded when calculating the column number.

Params:
  • pos –   character offset of the position
Returns:      the tab-expanded column number of pos (first column is 1)
/**
     * Find the column for a character position.
     * Tab characters preceding the position on the same line
     * will be expanded when calculating the column number.
     *
     * @param  pos   character offset of the position
     * @return       the tab-expanded column number of pos (first column is 1)
     */
    long getColumnNumber(long pos);
}