1 /*

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

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 /*

    27  * This file is available under and governed by the GNU General Public

    28  * License version 2 only, as published by the Free Software Foundation.

    29  * However, the following notice accompanied the original version of this

    30  * file:

    31  *

    32  * The MIT License

    33  *

    34  * Copyright (c) 2004-2014 Paul R. Holser, Jr.

    35  *

    36  * Permission is hereby granted, free of charge, to any person obtaining

    37  * a copy of this software and associated documentation files (the

    38  * "Software"), to deal in the Software without restriction, including

    39  * without limitation the rights to use, copy, modify, merge, publish,

    40  * distribute, sublicense, and/or sell copies of the Software, and to

    41  * permit persons to whom the Software is furnished to do so, subject to

    42  * the following conditions:

    43  *

    44  * The above copyright notice and this permission notice shall be

    45  * included in all copies or substantial portions of the Software.

    46  *

    47  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

    48  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

    49  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

    50  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

    51  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

    52  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

    53  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    54  */

    55 

    56 package jdk.internal.joptsimple.internal;

    57 

    58 import java.text.BreakIterator;

    59 import java.util.ArrayList;

    60 import java.util.List;

    61 import java.util.Locale;

    62 

    63 import static java.text.BreakIterator.*;

    64 

    65 import static jdk.internal.joptsimple.internal.Strings.*;

    66 

    67 /**

    68  * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>

    69  */

    70 class Columns {

    71     private static final int INDENT_WIDTH = 2;

    72 

    73     private final int optionWidth;

    74     private final int descriptionWidth;

    75 

    76     Columns( int optionWidth, int descriptionWidth ) {

    77         this.optionWidth = optionWidth;

    78         this.descriptionWidth = descriptionWidth;

    79     }

    80 

    81     List<Row> fit( Row row ) {

    82         List<String> options = piecesOf( row.option, optionWidth );

    83         List<String> descriptions = piecesOf( row.description, descriptionWidth );

    84 

    85         List<Row> rows = new ArrayList<Row>();

    86         for ( int i = 0; i < Math.max( options.size(), descriptions.size() ); ++i )

    87             rows.add( new Row( itemOrEmpty( options, i ), itemOrEmpty( descriptions, i ) ) );

    88 

    89         return rows;

    90     }

    91 

    92     private static String itemOrEmpty( List<String> items, int index ) {

    93         return index >= items.size() ? "" : items.get( index );

    94     }

    95 

    96     private List<String> piecesOf( String raw, int width ) {

    97         List<String> pieces = new ArrayList<String>();

    98 

    99         for ( String each : raw.trim().split( LINE_SEPARATOR ) )

   100             pieces.addAll( piecesOfEmbeddedLine( each, width ) );

   101 

   102         return pieces;

   103     }

   104 

   105     private List<String> piecesOfEmbeddedLine( String line, int width ) {

   106         List<String> pieces = new ArrayList<String>();

   107 

   108         BreakIterator words = BreakIterator.getLineInstance( Locale.US );

   109         words.setText( line );

   110 

   111         StringBuilder nextPiece = new StringBuilder();

   112 

   113         int start = words.first();

   114         for ( int end = words.next(); end != DONE; start = end, end = words.next() )

   115             nextPiece = processNextWord( line, nextPiece, start, end, width, pieces );

   116 

   117         if ( nextPiece.length() > 0 )

   118             pieces.add( nextPiece.toString() );

   119 

   120         return pieces;

   121     }

   122 

   123     private StringBuilder processNextWord( String source, StringBuilder nextPiece, int start, int end, int width,

   124                                            List<String> pieces ) {

   125         StringBuilder augmented = nextPiece;

   126 

   127         String word = source.substring( start, end );

   128         if ( augmented.length() + word.length() > width ) {

   129             pieces.add( augmented.toString().replaceAll( "\\s+$", "" ) );

   130             augmented = new StringBuilder( repeat( ' ', INDENT_WIDTH ) ).append( word );

   131         }

   132         else

   133             augmented.append( word );

   134 

   135         return augmented;

   136     }

   137 }