/*

 * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.io.File;

import javax.tools.FileObject;

import com.sun.javadoc.SourcePosition;

import com.sun.tools.javac.util.Position;

/**

 * A source position: filename, line number, and column number.

 *

 *  <p><b>This is NOT part of any supported API.

 *  If you write code that depends on this, you do so at your own risk.

 *  This code and its internal interfaces are subject to change or

 *  deletion without notice.</b>

 *

 * @since J2SE1.4

 * @author Neal M Gafter

 * @author Michael Van De Vanter (position representation changed to char offsets)

 */

public class SourcePositionImpl implements SourcePosition {

    FileObject filename;

    int position;

    Position.LineMap lineMap;

    /** The source file. Returns null if no file information is

     *  available. */

    public File file() {

        return (filename == null) ? null : new File(filename.getName());

    }

    /** The source file. Returns null if no file information is

     *  available. */

    public FileObject fileObject() {

        return filename;

    }

    /** The line in the source file. The first line is numbered 1;

     *  0 means no line number information is available. */

    public int line() {

        if (lineMap == null) {

            return 0;

        } else {

            return lineMap.getLineNumber(position);

        }

    }

    /** The column in the source file. The first column is

     *  numbered 1; 0 means no column information is available.

     *  Columns count characters in the input stream; a tab

     *  advances the column number to the next 8-column tab stop.

     */

    public int column() {

        if (lineMap == null) {

            return 0;

        }else {

            return lineMap.getColumnNumber(position);

        }

    }

    private SourcePositionImpl(FileObject file, int position,

                               Position.LineMap lineMap) {

        super();

        this.filename = file;

        this.position = position;

        this.lineMap = lineMap;

    }

    public static SourcePosition make(FileObject file, int pos,

                                      Position.LineMap lineMap) {

        if (file == null) return null;

        return new SourcePositionImpl(file, pos, lineMap);

    }

    public String toString() {

        // Backwards compatibility hack. ZipFileObjects use the format

        // zipfile(zipentry) but javadoc has been using zipfile/zipentry

        String fn = filename.getName();

        if (fn.endsWith(")")) {

            int paren = fn.lastIndexOf("(");

            if (paren != -1) {

                int i = paren+1;

                if (fn.charAt(i) == '/')

                    i++;

                fn = fn.substring(0, paren)

                        + File.separatorChar

                        + fn.substring(i, fn.length() - 1);

            }

        }

        if (position == Position.NOPOS)

            return fn;

        else

            return fn + ":" + line();

    }

}