132 lines
3.2 KiB
Java
132 lines
3.2 KiB
Java
/*******************************************************************************
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* Copyright (c) 2007 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.cast.tree.impl;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.net.URL;
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import org.apache.commons.io.IOUtils;
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import com.ibm.wala.cast.tree.CAstSourcePositionMap.Position;
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public class RangePosition extends AbstractSourcePosition {
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private final static int TABSIZE = 4;
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private final URL url;
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private final int startLine;
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private final int endLine;
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private final int startOffset;
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private final int endOffset;
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private int col = -1;
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private int lastCol = -1;
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public RangePosition(URL url, int startLine, int endLine, int startOffset, int endOffset) {
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super();
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this.url = url;
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this.startLine = startLine;
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this.endLine = endLine;
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this.startOffset = startOffset;
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this.endOffset = endOffset;
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}
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public RangePosition(URL url, int line, int startOffset, int endOffset) {
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this(url, line, -1, startOffset, endOffset);
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}
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@Override
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public int compareTo(Object o) {
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Position other = (Position) o;
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if (startOffset != other.getFirstOffset()) {
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return startOffset - other.getFirstOffset();
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} else {
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return endOffset - other.getLastOffset();
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}
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}
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@Override
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public int getFirstLine() {
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return startLine;
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}
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@Override
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public int getLastLine() {
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return endLine;
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}
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@Override
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public int getFirstCol() {
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if (col == -1) {
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col = getCol(getFirstLine(), startOffset);
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}
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return col;
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}
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@Override
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public int getLastCol() {
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if (lastCol == -1) {
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lastCol = getCol(getLastLine(), endOffset);
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}
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return lastCol;
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}
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private int getCol(int line, int offset) {
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int col = -1;
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try (Reader reader = getReader()){
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col = getCol(IOUtils.toString(reader), line, offset);
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} catch (IOException e) {
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e.printStackTrace();
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}
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return col;
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}
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public static int getCol(String content, int line, int offset) {
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if (line == 1) {
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return offset + 1;
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}
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int pos = -1;
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for (int i = 0; i < line - 1; i++) {
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pos = content.indexOf('\n', pos + 1);
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}
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try {
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String lineBeginning = content.substring(pos, offset);
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int nrOfTabs = lineBeginning.length() - lineBeginning.replace("\t", "").length();
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return offset - pos + (TABSIZE - 1) * nrOfTabs;
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} catch (StringIndexOutOfBoundsException e) {
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e.printStackTrace();
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return -1;
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}
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}
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@Override
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public int getFirstOffset() {
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return startOffset;
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}
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@Override
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public int getLastOffset() {
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return endOffset;
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}
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@Override
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public URL getURL() {
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return url;
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}
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@Override
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public Reader getReader() throws IOException {
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return new InputStreamReader(url.openStream());
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}
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}
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