10
|
1 /*******************************************************************************
|
|
2 * Copyright (c) 2000, 2007 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.viewers.StructuredSelection;
|
|
14
|
|
15 import dwtx.jface.viewers.IStructuredSelection;
|
|
16
|
|
17 // import java.util.Arrays;
|
|
18 // import java.util.Iterator;
|
|
19 import tango.util.collection.ArraySeq;
|
|
20 import tango.util.collection.model.Seq;
|
|
21 import tango.util.collection.model.SeqView;
|
|
22 import tango.util.collection.model.Iterator;
|
|
23
|
|
24 import dwtx.core.runtime.Assert;
|
|
25 import dwtx.jface.resource.JFaceResources;
|
|
26
|
|
27 import dwt.dwthelper.utils;
|
|
28
|
|
29 /**
|
|
30 * A concrete implementation of the <code>IStructuredSelection</code> interface,
|
|
31 * suitable for instantiating.
|
|
32 * <p>
|
|
33 * This class is not intended to be subclassed.
|
|
34 * </p>
|
|
35 */
|
|
36 public class StructuredSelection : IStructuredSelection {
|
|
37
|
|
38 /**
|
|
39 * The element that make up this structured selection.
|
|
40 */
|
|
41 private Object[] elements;
|
|
42
|
|
43 /**
|
|
44 * The canonical empty selection. This selection should be used instead of
|
|
45 * <code>null</code>.
|
|
46 */
|
|
47 public static const StructuredSelection EMPTY;
|
|
48 static this(){
|
|
49 EMPTY = new StructuredSelection();
|
|
50 }
|
|
51 /**
|
|
52 * Creates a new empty selection.
|
|
53 * See also the static field <code>EMPTY</code> which contains an empty selection singleton.
|
|
54 *
|
|
55 * @see #EMPTY
|
|
56 */
|
|
57 public this() {
|
|
58 }
|
|
59
|
|
60 /**
|
|
61 * Creates a structured selection from the given elements.
|
|
62 *
|
|
63 * @param elements an array of elements
|
|
64 */
|
|
65 public this(Object[] elements) {
|
|
66 this.elements = new Object[elements.length];
|
|
67 System.arraycopy(elements, 0, this.elements, 0, elements.length);
|
|
68 }
|
|
69
|
|
70 /**
|
|
71 * Creates a structured selection containing a single object.
|
|
72 * The object must not be <code>null</code>.
|
|
73 *
|
|
74 * @param element the element
|
|
75 */
|
|
76 public this(Object element) {
|
|
77 Assert.isNotNull(element);
|
|
78 elements = [ element ];
|
|
79 }
|
|
80
|
|
81 /**
|
|
82 * Creates a structured selection from the given <code>List</code>.
|
|
83 * @param elements list of selected elements
|
|
84 */
|
|
85 public this(SeqView!(Object) elements) {
|
|
86 Assert.isNotNull(cast(Object)elements);
|
|
87 this.elements = elements.toArray();
|
|
88 }
|
|
89
|
|
90 /**
|
|
91 * Returns whether this structured selection is equal to the given object.
|
|
92 * Two structured selections are equal if they contain the same elements
|
|
93 * in the same order.
|
|
94 *
|
|
95 * @param o the other object
|
|
96 * @return <code>true</code> if they are equal, and <code>false</code> otherwise
|
|
97 */
|
|
98 public bool equals(Object o) {
|
|
99 if (this is o) {
|
|
100 return true;
|
|
101 }
|
|
102 //null and other classes
|
|
103 if (!(cast(StructuredSelection)o )) {
|
|
104 return false;
|
|
105 }
|
|
106 StructuredSelection s2 = cast(StructuredSelection) o;
|
|
107
|
|
108 // either or both empty?
|
|
109 if (isEmpty()) {
|
|
110 return s2.isEmpty();
|
|
111 }
|
|
112 if (s2.isEmpty()) {
|
|
113 return false;
|
|
114 }
|
|
115
|
|
116 //size
|
|
117 int myLen = elements.length;
|
|
118 if (myLen !is s2.elements.length) {
|
|
119 return false;
|
|
120 }
|
|
121 //element comparison
|
|
122 for (int i = 0; i < myLen; i++) {
|
|
123 if (!elements[i].opEquals(s2.elements[i])) {
|
|
124 return false;
|
|
125 }
|
|
126 }
|
|
127 return true;
|
|
128 }
|
|
129
|
|
130 /* (non-Javadoc)
|
|
131 * Method declared in IStructuredSelection.
|
|
132 */
|
|
133 public Object getFirstElement() {
|
|
134 return isEmpty() ? null : elements[0];
|
|
135 }
|
|
136
|
|
137 /* (non-Javadoc)
|
|
138 * Method declared in ISelection.
|
|
139 */
|
|
140 public bool isEmpty() {
|
|
141 return elements is null || elements.length is 0;
|
|
142 }
|
|
143
|
|
144 /* (non-Javadoc)
|
|
145 * Method declared in IStructuredSelection.
|
|
146 */
|
|
147 public Iterator!(Object) iterator() {
|
|
148 auto res = new ArraySeq!(Object);
|
|
149 res.capacity( elements.length );
|
|
150 foreach( o; elements ){
|
|
151 res.append( o );
|
|
152 }
|
|
153 return res.elements;
|
|
154 }
|
|
155
|
|
156 /* (non-Javadoc)
|
|
157 * Method declared in IStructuredSelection.
|
|
158 */
|
|
159 public int size() {
|
|
160 return elements is null ? 0 : elements.length;
|
|
161 }
|
|
162
|
|
163 /* (non-Javadoc)
|
|
164 * Method declared in IStructuredSelection.
|
|
165 */
|
|
166 public Object[] toArray() {
|
|
167 return elements is null ? new Object[0] : elements.dup;
|
|
168 }
|
|
169
|
|
170 /* (non-Javadoc)
|
|
171 * Method declared in IStructuredSelection.
|
|
172 */
|
|
173 public SeqView!(Object) toList() {
|
|
174 auto res = new ArraySeq!(Object);
|
|
175 res.capacity( elements.length );
|
|
176 foreach( o; elements ){
|
|
177 res.append( o );
|
|
178 }
|
|
179 return res;
|
|
180 }
|
|
181
|
|
182 /**
|
|
183 * Internal method which returns a string representation of this
|
|
184 * selection suitable for debug purposes only.
|
|
185 *
|
|
186 * @return debug string
|
|
187 */
|
|
188 public String toString() {
|
|
189 return isEmpty() ? JFaceResources.getString("<empty_selection>") : (cast(Object)toList()).toString(); //$NON-NLS-1$
|
|
190 }
|
|
191 }
|