| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.text; |
| |
| |
| |
| |
| /** |
| * Standard implementation of <code>ILineTracker</code>. |
| * The line tracker considers the three common line |
| * delimiters which are '\n', '\r', '\r\n'.<p> |
| * This class is not intended to be subclassed. |
| */ |
| public class DefaultLineTracker extends AbstractLineTracker { |
| |
| /** The predefined delimiters of this tracker */ |
| public final static String[] DELIMITERS= { "\r", "\n", "\r\n" }; //$NON-NLS-3$ //$NON-NLS-1$ //$NON-NLS-2$ |
| /** A predefined delimiter info which is always reused as return value */ |
| private DelimiterInfo fDelimiterInfo= new DelimiterInfo(); |
| |
| |
| /** |
| * Creates a standard line tracker. |
| */ |
| public DefaultLineTracker() { |
| } |
| |
| /* |
| * @see ILineDelimiter@getLegalLineDelimiters() |
| */ |
| public String[] getLegalLineDelimiters() { |
| return DELIMITERS; |
| } |
| |
| /* |
| * @see AbstractLineTracker#nextDelimiterInfo(String, int) |
| */ |
| protected DelimiterInfo nextDelimiterInfo(String text, int offset) { |
| |
| char ch; |
| int length= text.length(); |
| for (int i= offset; i < length; i++) { |
| |
| ch= text.charAt(i); |
| if (ch == '\r') { |
| |
| if (i + 1 < length) { |
| if (text.charAt(i + 1) == '\n') { |
| fDelimiterInfo.delimiter= DELIMITERS[2]; |
| fDelimiterInfo.delimiterIndex= i; |
| fDelimiterInfo.delimiterLength= 2; |
| return fDelimiterInfo; |
| } |
| } |
| |
| fDelimiterInfo.delimiter= DELIMITERS[0]; |
| fDelimiterInfo.delimiterIndex= i; |
| fDelimiterInfo.delimiterLength= 1; |
| return fDelimiterInfo; |
| |
| } else if (ch == '\n') { |
| |
| fDelimiterInfo.delimiter= DELIMITERS[1]; |
| fDelimiterInfo.delimiterIndex= i; |
| fDelimiterInfo.delimiterLength= 1; |
| return fDelimiterInfo; |
| } |
| } |
| |
| return null; |
| } |
| } |