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comparison dwtx/jface/text/DocumentPartitioningChangedEvent.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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128:8df1d4193877 129:eb30df5ca28b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2006 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 dwtx.jface.text.DocumentPartitioningChangedEvent;
14
15 import dwt.dwthelper.utils;
16
17 import java.util.HashMap;
18 import java.util.Iterator;
19 import java.util.Map;
20
21 import dwtx.core.runtime.Assert;
22
23 /**
24 * Event describing the change of document partitionings.
25 *
26 * @see dwtx.jface.text.IDocumentExtension3
27 * @since 3.0
28 */
29 public class DocumentPartitioningChangedEvent {
30
31 /** The document whose partitionings changed */
32 private final IDocument fDocument;
33 /** The map of partitionings to changed regions. */
34 private final Map fMap= new HashMap();
35
36
37 /**
38 * Creates a new document partitioning changed event for the given document.
39 * Initially this event is empty, i.e. does not describe any change.
40 *
41 * @param document the changed document
42 */
43 public DocumentPartitioningChangedEvent(IDocument document) {
44 fDocument= document;
45 }
46
47 /**
48 * Returns the changed document.
49 *
50 * @return the changed document
51 */
52 public IDocument getDocument() {
53 return fDocument;
54 }
55
56 /**
57 * Returns the changed region of the given partitioning or <code>null</code>
58 * if the given partitioning did not change.
59 *
60 * @param partitioning the partitioning
61 * @return the changed region of the given partitioning or <code>null</code>
62 */
63 public IRegion getChangedRegion(String partitioning) {
64 return (IRegion) fMap.get(partitioning);
65 }
66
67 /**
68 * Returns the set of changed partitionings.
69 *
70 * @return the set of changed partitionings
71 */
72 public String[] getChangedPartitionings() {
73 String[] partitionings= new String[fMap.size()];
74 fMap.keySet().toArray(partitionings);
75 return partitionings;
76 }
77
78 /**
79 * Sets the specified range as changed region for the given partitioning.
80 *
81 * @param partitioning the partitioning
82 * @param offset the region offset
83 * @param length the region length
84 */
85 public void setPartitionChange(String partitioning, int offset, int length) {
86 Assert.isNotNull(partitioning);
87 fMap.put(partitioning, new Region(offset, length));
88 }
89
90 /**
91 * Returns <code>true</code> if the set of changed partitionings is empty,
92 * <code>false</code> otherwise.
93 *
94 * @return <code>true</code> if the set of changed partitionings is empty
95 */
96 public bool isEmpty() {
97 return fMap.isEmpty();
98 }
99
100 /**
101 * Returns the coverage of this event. This is the minimal region that
102 * contains all changed regions of all changed partitionings.
103 *
104 * @return the coverage of this event
105 */
106 public IRegion getCoverage() {
107 if (fMap.isEmpty())
108 return new Region(0, 0);
109
110 int offset= -1;
111 int endOffset= -1;
112 Iterator e= fMap.values().iterator();
113 while (e.hasNext()) {
114 IRegion r= (IRegion) e.next();
115
116 if (offset < 0 || r.getOffset() < offset)
117 offset= r.getOffset();
118
119 int end= r.getOffset() + r.getLength();
120 if (end > endOffset)
121 endOffset= end;
122 }
123
124 return new Region(offset, endOffset - offset);
125 }
126 }