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/*
* Copyright (C) 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.doclava;
public class SourcePositionInfo implements Comparable {
public static final SourcePositionInfo UNKNOWN = new SourcePositionInfo("(unknown)", 0, 0);
public SourcePositionInfo(String file, int line, int column) {
this.file = file;
this.line = line;
this.column = column;
}
public SourcePositionInfo(SourcePositionInfo that) {
this.file = that.file;
this.line = that.line;
this.column = that.column;
}
/**
* Given this position and str which occurs at that position, as well as str an index into str,
* find the SourcePositionInfo.
*
* @throw StringIndexOutOfBoundsException if index > str.length()
*/
public static SourcePositionInfo add(SourcePositionInfo that, String str, int index) {
if (that == null) {
return null;
}
int line = that.line;
char prev = 0;
for (int i = 0; i < index; i++) {
char c = str.charAt(i);
if (c == '\r' || (c == '\n' && prev != '\r')) {
line++;
}
prev = c;
}
return new SourcePositionInfo(that.file, line, 0);
}
public static SourcePositionInfo findBeginning(SourcePositionInfo that, String str) {
if (that == null) {
return null;
}
int line = that.line - 1; // -1 because, well, it seems to work
int prev = 0;
for (int i = str.length() - 1; i >= 0; i--) {
char c = str.charAt(i);
if ((c == '\r' && prev != '\n') || (c == '\n')) {
line--;
}
prev = c;
}
return new SourcePositionInfo(that.file, line, 0);
}
@Override
public String toString() {
return file + ':' + line;
}
public int compareTo(Object o) {
SourcePositionInfo that = (SourcePositionInfo) o;
int r = this.file.compareTo(that.file);
if (r != 0) return r;
return this.line - that.line;
}
/**
* Build a SourcePositionInfo from the XML source= notation
*/
public static SourcePositionInfo fromXml(String source) {
if (source != null) {
for (int i = 0; i < source.length(); i++) {
if (source.charAt(i) == ':') {
return new SourcePositionInfo(source.substring(0, i), Integer.parseInt(source
.substring(i + 1)), 0);
}
}
}
return UNKNOWN;
}
public String file;
public int line;
public int column;
}
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