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.text;
32
33 import palmed.edit.util.Coordinate;
34
35 /***
36 * This class implements a coordinate extractor.
37 *
38 * @author Mathieu Champlon
39 * @version $Revision$ $Date$
40 */
41 public final class CoordinateExtractor implements ILineExtractor
42 {
43 /***
44 * The coordinate to extract.
45 */
46 private final Coordinate coordinate_;
47 /***
48 * The functor to call.
49 */
50 private final ICoordinateExtractor functor_;
51 /***
52 * The width of the line at the coordinate.
53 */
54 private int width_;
55 /***
56 * Whether the coordinate has been found or not.
57 */
58 private boolean hasBeenFound_;
59
60 /***
61 * Create a coordinate extractor.
62 *
63 * @param coordinate the coordinate to extract
64 * @param functor the functor to call when found
65 */
66 public CoordinateExtractor( final Coordinate coordinate, final ICoordinateExtractor functor )
67 {
68 if( coordinate == null )
69 throw new IllegalArgumentException( "parameter 'coordinate' is null" );
70 if( functor == null )
71 throw new IllegalArgumentException( "parameter 'functor' is null" );
72 coordinate_ = coordinate;
73 functor_ = functor;
74 width_ = 0;
75 hasBeenFound_ = false;
76 }
77
78 /***
79 * {@inheritDoc}
80 */
81 public void select( final IText text, final int line )
82 {
83 if( hasBeenFound_ )
84 return;
85 final int x = coordinate_.x_ - width_;
86 final int length = text.getLine( line ).length();
87 if( x <= length )
88 {
89 hasBeenFound_ = true;
90 functor_.select( text, new Coordinate( x, line ) );
91 }
92 width_ += length;
93 }
94 }