Mercurial > projects > dwt-addons

comparison dwtx/text/edits/TextEditCopier.d @ 129:eb30df5ca28b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
parents
children b56e9be9fe88
comparison
equal deleted inserted replaced
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.text.edits.TextEditCopier;
14
15 import dwt.dwthelper.utils;
16
17 import java.util.ArrayList;
18 import java.util.HashMap;
19 import java.util.Iterator;
20 import java.util.List;
21 import java.util.Map;
22
23 import dwtx.core.runtime.Assert;
24
25
26 /**
27 * Copies a tree of text edits. A text edit copier keeps a map
28 * between original and new text edits. It can be used to map
29 * a copy back to its original edit.
30 *
31 * @since 3.0
32 */
33 public final class TextEditCopier {
34
35 private TextEdit fEdit;
36 private Map fCopies;
37
38 /**
39 * Constructs a new <code>TextEditCopier</code> for the
40 * given edit. The actual copy is done by calling <code>
41 * perform</code>.
42 *
43 * @param edit the edit to copy
44 *
45 * @see #perform()
46 */
47 public TextEditCopier(TextEdit edit) {
48 super();
49 Assert.isNotNull(edit);
50 fEdit= edit;
51 fCopies= new HashMap();
52 }
53
54 /**
55 * Performs the actual copying.
56 *
57 * @return the copy
58 */
59 public TextEdit perform() {
60 TextEdit result= doCopy(fEdit);
61 if (result !is null) {
62 for (Iterator iter= fCopies.keySet().iterator(); iter.hasNext();) {
63 TextEdit edit= (TextEdit)iter.next();
64 edit.postProcessCopy(this);
65 }
66 }
67 return result;
68 }
69
70 /**
71 * Returns the copy for the original text edit.
72 *
73 * @param original the original for which the copy
74 * is requested
75 * @return the copy of the original edit or <code>null</code>
76 * if the original isn't managed by this copier
77 */
78 public TextEdit getCopy(TextEdit original) {
79 Assert.isNotNull(original);
80 return (TextEdit)fCopies.get(original);
81 }
82
83 //---- helper methods --------------------------------------------
84
85 private TextEdit doCopy(TextEdit edit) {
86 TextEdit result= edit.doCopy();
87 List children= edit.internalGetChildren();
88 if (children !is null) {
89 List newChildren= new ArrayList(children.size());
90 for (Iterator iter= children.iterator(); iter.hasNext();) {
91 TextEdit childCopy= doCopy((TextEdit)iter.next());
92 childCopy.internalSetParent(result);
93 newChildren.add(childCopy);
94 }
95 result.internalSetChildren(newChildren);
96 }
97 addCopy(edit, result);
98 return result;
99 }
100
101 private void addCopy(TextEdit original, TextEdit copy) {
102 fCopies.put(original, copy);
103 }
104 }