Package com.sun.tools.javac.util

Class Position.LineTabMapImpl

java.lang.Object

com.sun.tools.javac.util.Position.LineTabMapImpl

All Implemented Interfaces:

LineMap, Position.LineMap

Enclosing class:

Position

public static class Position.LineTabMapImpl
extends Object

A LineMap that handles tab expansion correctly. The cost is an additional bit per character in the source array.

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	startPosition

Constructor Summary

Constructors

Constructor and Description
LineTabMapImpl(int max)

Method Summary

Modifier and Type	Method and Description
protected void	build(char[] src, int max)
int	getColumnNumber(int pos) Find the column for a character position.
long	getColumnNumber(long pos) Find the column for a character position.
int	getLineNumber(int pos) Find the line containing a position; a line termination character is on the line it terminates.
long	getLineNumber(long pos) Find the line containing a position; a line termination character is on the line it terminates.
int	getPosition(int line, int column) Find the position corresponding to a (line,column).
long	getPosition(long line, long column) Find the position corresponding to a (line,column).
int	getStartPosition(int line) Find the start position of a line.
long	getStartPosition(long line) Find the start position of a line.
protected void	setTabPosition(int offset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

startPosition

protected int[] startPosition

Constructor Detail

LineTabMapImpl

public LineTabMapImpl(int max)

Method Detail

setTabPosition

protected void setTabPosition(int offset)

getColumnNumber

public int getColumnNumber(int pos)

Description copied from interface: Position.LineMap

Find the column for a character position. Note: this method does not handle tab expansion. If tab expansion is needed, use a LineTabMap instead.

Specified by:

getColumnNumber in interface Position.LineMap

Parameters:

pos - character offset of the position

Returns:

the column number at which pos occurs

getPosition

public int getPosition(int line,
                       int column)

Description copied from interface: Position.LineMap

Find the position corresponding to a (line,column).

Specified by:

getPosition in interface Position.LineMap

Parameters:

line - number of line (first is 1)

column - number of character on line (first is 1)

Returns:

position of character

build

protected void build(char[] src,
                     int max)

getStartPosition

public int getStartPosition(int line)

Description copied from interface: Position.LineMap

Find the start position of a line.

Specified by:

getStartPosition in interface Position.LineMap

Parameters:

line - number of line (first is 1)

Returns:

position of first character in line

getStartPosition

public long getStartPosition(long line)

Description copied from interface: LineMap

Find the start position of a line.

Specified by:

getStartPosition in interface LineMap

Parameters:

line - line number (beginning at 1)

Returns:

position of first character in line

getPosition

public long getPosition(long line,
                        long column)

Description copied from interface: LineMap

Find the position corresponding to a (line,column).

Specified by:

getPosition in interface LineMap

Parameters:

line - line number (beginning at 1)

column - tab-expanded column number (beginning 1)

Returns:

position of character

getLineNumber

public int getLineNumber(int pos)

Description copied from interface: Position.LineMap

Find the line containing a position; a line termination character is on the line it terminates.

Specified by:

getLineNumber in interface Position.LineMap

Parameters:

pos - character offset of the position

Returns:

the line number on which pos occurs (first line is 1)

getLineNumber

public long getLineNumber(long pos)

Description copied from interface: LineMap

Find the line containing a position; a line termination character is on the line it terminates.

Specified by:

getLineNumber in interface LineMap

Parameters:

pos - character offset of the position

Returns:

the line number of pos (first line is 1)

getColumnNumber

public long getColumnNumber(long pos)

Description copied from interface: LineMap

Find the column for a character position. Tab characters preceding the position on the same line will be expanded when calculating the column number.

Specified by:

getColumnNumber in interface LineMap

Parameters:

pos - character offset of the position

Returns:

the tab-expanded column number of pos (first column is 1)