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80 lines
1.8 KiB
80 lines
1.8 KiB
/*
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* Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package com.sun.source.tree;
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/**
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* Provides methods to convert between character positions and line numbers
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* for a compilation unit.
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*
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* @since 1.6
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*/
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@jdk.Exported
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public interface LineMap {
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/**
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* Find the start position of a line.
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*
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* @param line line number (beginning at 1)
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* @return position of first character in line
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* @throws IndexOutOfBoundsException
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* if {@code lineNumber < 1}
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* if {@code lineNumber > no. of lines}
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*/
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long getStartPosition(long line);
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/**
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* Find the position corresponding to a (line,column).
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*
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* @param line line number (beginning at 1)
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* @param column tab-expanded column number (beginning 1)
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*
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* @return position of character
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* @throws IndexOutOfBoundsException
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* if {@code line < 1}
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* if {@code line > no. of lines}
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*/
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long getPosition(long line, long column);
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/**
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* Find the line containing a position; a line termination
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* character is on the line it terminates.
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*
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* @param pos character offset of the position
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* @return the line number of pos (first line is 1)
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*/
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long getLineNumber(long pos);
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/**
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* Find the column for a character position.
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* Tab characters preceding the position on the same line
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* will be expanded when calculating the column number.
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*
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* @param pos character offset of the position
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* @return the tab-expanded column number of pos (first column is 1)
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*/
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long getColumnNumber(long pos);
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}
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