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/**
* Copyright (c) 2017 Angelo ZERR.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - [CodeMining] Provide inline annotations support - Bug 527675
*/
package org.eclipse.jface.text.source.inlined;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.Position;
/**
* Utilities class to retrieve position.
*
* @since 3.13
*/
public class Positions {
/**
* Returns the line position by taking care or not of of leading spaces.
*
* @param lineIndex the line index
* @param document the document
* @param leadingSpaces true if line spacing must take care of and not otherwise.
* @return the line position by taking care of leading spaces.
* @throws BadLocationException if the line number is invalid in this document
*/
public static Position of(int lineIndex, IDocument document, boolean leadingSpaces) throws BadLocationException {
int offset= document.getLineOffset(lineIndex);
int lineLength= document.getLineLength(lineIndex);
String line= document.get(offset, lineLength);
if (leadingSpaces) {
offset+= getLeadingSpaces(line);
}
return new Position(offset, 1);
}
/**
* Returns the leading spaces of the given line text.
*
* @param line the line text.
* @return the leading spaces of the given line text.
*/
private static int getLeadingSpaces(String line) {
int counter= 0;
char[] chars= line.toCharArray();
for (char c : chars) {
if (c == '\t')
counter++;
else if (c == ' ')
counter++;
else
break;
}
return counter;
}
}
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