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comparison org.eclipse.text/src/org/eclipse/jface/text/link/InclusivePositionUpdater.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children 5feec68b4556
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11:43904fec5dca 12:bc29606a740c
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.jface.text.link.InclusivePositionUpdater;
14
15 import org.eclipse.jface.text.link.LinkedModeModel; // packageimport
16 import org.eclipse.jface.text.link.LinkedPosition; // packageimport
17 import org.eclipse.jface.text.link.ILinkedModeListener; // packageimport
18 import org.eclipse.jface.text.link.TabStopIterator; // packageimport
19 import org.eclipse.jface.text.link.LinkedModeUI; // packageimport
20 import org.eclipse.jface.text.link.LinkedPositionGroup; // packageimport
21 import org.eclipse.jface.text.link.LinkedModeManager; // packageimport
22 import org.eclipse.jface.text.link.LinkedPositionAnnotations; // packageimport
23 import org.eclipse.jface.text.link.ProposalPosition; // packageimport
24
25
26 import java.lang.all;
27 import java.util.Set;
28
29 import org.eclipse.jface.text.BadPositionCategoryException;
30 import org.eclipse.jface.text.DocumentEvent;
31 import org.eclipse.jface.text.IPositionUpdater;
32 import org.eclipse.jface.text.Position;
33
34
35 /**
36 * Position updater that considers any change in
37 * <code>[p.offset,&nbsp;p.offset&nbsp;+&nbsp;p.length]</code> of a {@link Position}
38 * <code>p</code> as belonging to the position.
39 * <p>
40 * Internal class. Do not use. Public for testing purposes only.
41 * </p>
42 *
43 * @since 3.0
44 * @noinstantiate This class is not intended to be instantiated by clients.
45 * @noextend This class is not intended to be subclassed by clients.
46 */
47 public class InclusivePositionUpdater : IPositionUpdater {
48
49 /** The position category. */
50 private const String fCategory;
51
52 /**
53 * Creates a new updater for the given <code>category</code>.
54 *
55 * @param category the new category.
56 */
57 public this(String category) {
58 fCategory= category;
59 }
60
61 /*
62 * @see org.eclipse.jface.text.IPositionUpdater#update(org.eclipse.jface.text.DocumentEvent)
63 */
64 public void update(DocumentEvent event) {
65
66 int eventOffset= event.getOffset();
67 int eventOldLength= event.getLength();
68 int eventNewLength= event.getText() is null ? 0 : event.getText().length();
69 int deltaLength= eventNewLength - eventOldLength;
70
71 try {
72 Position[] positions= event.getDocument().getPositions(fCategory);
73
74 for (int i= 0; i !is positions.length; i++) {
75
76 Position position= positions[i];
77
78 if (position.isDeleted())
79 continue;
80
81 int offset= position.getOffset();
82 int length= position.getLength();
83 int end= offset + length;
84
85 if (offset > eventOffset + eventOldLength)
86 // position comes way
87 // after change - shift
88 position.setOffset(offset + deltaLength);
89 else if (end < eventOffset) {
90 // position comes way before change -
91 // leave alone
92 } else if (offset <= eventOffset && end >= eventOffset + eventOldLength) {
93 // event completely internal to the position - adjust length
94 position.setLength(length + deltaLength);
95 } else if (offset < eventOffset) {
96 // event extends over end of position - adjust length
97 int newEnd= eventOffset + eventNewLength;
98 position.setLength(newEnd - offset);
99 } else if (end > eventOffset + eventOldLength) {
100 // event extends from before position into it - adjust offset
101 // and length
102 // offset becomes end of event, length adjusted accordingly
103 // we want to recycle the overlapping part
104 position.setOffset(eventOffset);
105 int deleted= eventOffset + eventOldLength - offset;
106 position.setLength(length - deleted + eventNewLength);
107 } else {
108 // event consumes the position - delete it
109 position.delete_();
110 }
111 }
112 } catch (BadPositionCategoryException e) {
113 // ignore and return
114 }
115 }
116
117 /**
118 * Returns the position category.
119 *
120 * @return the position category
121 */
122 public String getCategory() {
123 return fCategory;
124 }
125
126 }