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/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.android.apicheck;
import java.lang.Comparable;
public class SourcePositionInfo implements Comparable
{
public SourcePositionInfo() {
this.file = "<unknown>";
this.line = 0;
this.column = 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);
}
public String toString()
{
if (this.file == null) {
return "(unknown)";
} else {
if (this.line == 0) {
return this.file + ':';
} else {
return this.file + ':' + this.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 new SourcePositionInfo("(unknown)", 0, 0);
}
public String file;
public int line;
public int column;
}
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