src.java.net.htmlparser.jericho.RowColumnVector Maven / Gradle / Ivy
// Jericho HTML Parser - Java based library for analysing and manipulating HTML
// Version 3.1
// Copyright (C) 2004-2009 Martin Jericho
// http://jericho.htmlparser.net/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of either one of the following licences:
//
// 1. The Eclipse Public License (EPL) version 1.0,
// included in this distribution in the file licence-epl-1.0.html
// or available at http://www.eclipse.org/legal/epl-v10.html
//
// 2. The GNU Lesser General Public License (LGPL) version 2.1 or later,
// included in this distribution in the file licence-lgpl-2.1.txt
// or available at http://www.gnu.org/licenses/lgpl.txt
//
// This library is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the individual licence texts for more details.
package net.htmlparser.jericho;
import java.util.*;
/**
* Represents the row and column number of a character position in the source document.
*
* Obtained using the {@link Source#getRowColumnVector(int pos)} method.
*/
public final class RowColumnVector {
private final int row;
private final int column;
private final int pos;
private static final RowColumnVector FIRST=new RowColumnVector(1,1,0);
private static final RowColumnVector[] STREAMED=new RowColumnVector[0];
private RowColumnVector(final int row, final int column, final int pos) {
this.row=row;
this.column=column;
this.pos=pos;
}
private RowColumnVector(final int pos) {
// used in Streamed source where row and column aren't available.
this(-1,-1,pos);
}
/**
* Returns the row number of this character position in the source document.
*
* If a {@link StreamedSource} is in use, this method always returns -1.
*
* @return the row number of this character position in the source document.
*/
public int getRow() {
return row;
}
/**
* Returns the column number of this character position in the source document.
*
* If a {@link StreamedSource} is in use, this method always returns -1.
*
* @return the column number of this character position in the source document.
*/
public int getColumn() {
return column;
}
/**
* Returns the character position in the source document.
* @return the character position in the source document.
*/
public int getPos() {
return pos;
}
/**
* Returns a string representation of this character position.
*
* The returned string has the format "(row,column:pos)".
*
* @return a string representation of this character position.
*/
public String toString() {
return appendTo(new StringBuilder(20)).toString();
}
StringBuilder appendTo(final StringBuilder sb) {
if (row!=-1) return sb.append("(r").append(row).append(",c").append(column).append(",p").append(pos).append(')');
return sb.append("(p").append(pos).append(')');
}
static RowColumnVector[] getCacheArray(final Source source) {
if (source.isStreamed()) return STREAMED;
final int lastSourcePos=source.end-1;
final ArrayList list=new ArrayList();
int pos=0;
list.add(FIRST);
int row=1;
while (pos<=lastSourcePos) {
final char ch=source.charAt(pos);
if (ch=='\n' || (ch=='\r' && (pos==lastSourcePos || source.charAt(pos+1)!='\n'))) list.add(new RowColumnVector(++row,1,pos+1));
pos++;
}
return list.toArray(new RowColumnVector[list.size()]);
}
static RowColumnVector get(final RowColumnVector[] cacheArray, final int pos) {
if (cacheArray==STREAMED) return new RowColumnVector(pos);
int low=0;
int high=cacheArray.length-1;
while (true) {
int mid=(low+high) >> 1;
final RowColumnVector rowColumnVector=cacheArray[mid];
if (rowColumnVector.pospos) {
high=mid-1;
} else {
return rowColumnVector;
}
}
}
}