| /* |
| The MIT License |
| |
| Copyright (c) 2004-2015 Paul R. Holser, Jr. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| package joptsimple.internal; |
| |
| import java.text.BreakIterator; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import static java.text.BreakIterator.*; |
| |
| import static joptsimple.internal.Strings.*; |
| |
| /** |
| * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a> |
| */ |
| class Columns { |
| private static final int INDENT_WIDTH = 2; |
| |
| private final int optionWidth; |
| private final int descriptionWidth; |
| |
| Columns( int optionWidth, int descriptionWidth ) { |
| this.optionWidth = optionWidth; |
| this.descriptionWidth = descriptionWidth; |
| } |
| |
| List<Row> fit( Row row ) { |
| List<String> options = piecesOf( row.option, optionWidth ); |
| List<String> descriptions = piecesOf( row.description, descriptionWidth ); |
| |
| List<Row> rows = new ArrayList<>(); |
| for ( int i = 0; i < Math.max( options.size(), descriptions.size() ); ++i ) |
| rows.add( new Row( itemOrEmpty( options, i ), itemOrEmpty( descriptions, i ) ) ); |
| |
| return rows; |
| } |
| |
| private static String itemOrEmpty( List<String> items, int index ) { |
| return index >= items.size() ? "" : items.get( index ); |
| } |
| |
| private List<String> piecesOf( String raw, int width ) { |
| List<String> pieces = new ArrayList<>(); |
| |
| for ( String each : raw.trim().split( LINE_SEPARATOR ) ) |
| pieces.addAll( piecesOfEmbeddedLine( each, width ) ); |
| |
| return pieces; |
| } |
| |
| private List<String> piecesOfEmbeddedLine( String line, int width ) { |
| List<String> pieces = new ArrayList<>(); |
| |
| BreakIterator words = BreakIterator.getLineInstance(); |
| words.setText( line ); |
| |
| StringBuilder nextPiece = new StringBuilder(); |
| |
| int start = words.first(); |
| for ( int end = words.next(); end != DONE; start = end, end = words.next() ) |
| nextPiece = processNextWord( line, nextPiece, start, end, width, pieces ); |
| |
| if ( nextPiece.length() > 0 ) |
| pieces.add( nextPiece.toString() ); |
| |
| return pieces; |
| } |
| |
| private StringBuilder processNextWord( String source, StringBuilder nextPiece, int start, int end, int width, |
| List<String> pieces ) { |
| StringBuilder augmented = nextPiece; |
| |
| String word = source.substring( start, end ); |
| if ( augmented.length() + word.length() > width ) { |
| pieces.add( augmented.toString().replaceAll( "\\s+$", "" ) ); |
| augmented = new StringBuilder( repeat( ' ', INDENT_WIDTH ) ).append( word ); |
| } |
| else |
| augmented.append( word ); |
| |
| return augmented; |
| } |
| } |