| package org.eclipse.jface.text; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved. |
| */ |
| |
| |
| |
| /** |
| * Standard implementation of a generic <code>ILineTracker</code>. |
| * The line tracker can be configured with the set of legal line delimiters. |
| * Line delimiters are unconstrainted. The line delimiters are used to |
| * compute the tracker's line structure. In the case of overlapping line delimiters, |
| * the longest line delimiter is given precedence of the shorter ones.<p> |
| * This class is not intended to be subclassed. |
| */ |
| public class ConfigurableLineTracker extends AbstractLineTracker { |
| |
| |
| /** The strings which are considered being the line delimiter */ |
| private String[] fDelimiters; |
| /** A predefined delimiter info which is always reused as return value */ |
| private DelimiterInfo fDelimiterInfo= new DelimiterInfo(); |
| |
| |
| /** |
| * Creates a standard line tracker for the given line delimiters. |
| * |
| * @param legalLineDelimiters the tracker's legal line delimiters, |
| * may not be <code>null</code> and must be longer than 0 |
| */ |
| public ConfigurableLineTracker(String[] legalLineDelimiters) { |
| Assert.isTrue(legalLineDelimiters != null && legalLineDelimiters.length > 0); |
| fDelimiters= legalLineDelimiters; |
| } |
| |
| /* |
| * @see ILineDelimiter@getLegalLineDelimiters |
| */ |
| public String[] getLegalLineDelimiters() { |
| return fDelimiters; |
| } |
| |
| /* |
| * @see AbstractLineTracker#nextDelimiterInfo(String, int) |
| */ |
| protected DelimiterInfo nextDelimiterInfo(String text, int offset) { |
| int[] info= TextUtilities.indexOf(fDelimiters, text, offset); |
| if (info[0] == -1) |
| return null; |
| |
| fDelimiterInfo.delimiterIndex= info[0]; |
| fDelimiterInfo.delimiter= fDelimiters[info[1]]; |
| fDelimiterInfo.delimiterLength= fDelimiterInfo.delimiter.length(); |
| return fDelimiterInfo; |
| } |
| } |