1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id$
29 */
30
31 package palmed.edit.view;
32
33 import palmed.edit.selection.ILineVisitor;
34
35 /***
36 * This class wraps a line visitor to translate each line to a given column.
37 *
38 * @author Mathieu Champlon
39 * @version $Revision$ $Date$
40 */
41 public final class TranslatedLineVisitor implements ILineVisitor
42 {
43 /***
44 * The wrapped visitor.
45 */
46 private final ILineVisitor visitor_;
47 /***
48 * The number of translated columns.
49 */
50 private final int column_;
51
52 /***
53 * Create a translated line visitor.
54 *
55 * @param visitor the visitor to wrap
56 * @param column the number of column to translate the lines to the left
57 */
58 public TranslatedLineVisitor( final ILineVisitor visitor, final int column )
59 {
60 if( visitor == null )
61 throw new IllegalArgumentException( "parameter 'visitor' is null" );
62 visitor_ = visitor;
63 column_ = column;
64 }
65
66 /***
67 * {@inheritDoc}
68 */
69 public void visit( final String text, final int start, final int end, final boolean continues )
70 {
71 visitor_.visit( clip( text ), Math.max( 0, start - column_ ), Math.max( 0, end - column_ ), continues );
72 }
73
74 private String clip( final String text )
75 {
76 if( column_ < text.length() )
77 return text.substring( column_ );
78 return "";
79 }
80 }