Mercurial > projects > dwt-addons
annotate dwtx/jface/viewers/StructuredSelection.d @ 71:4878bef4a38e
Some fixing
| author | Frank Benoit <benoit@tionex.de> |
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| date | Thu, 22 May 2008 04:03:58 +0200 |
| parents | 46a6e0e6ccd4 |
| children | 5df4896124c7 |
| rev | line source |
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| 10 | 1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 10 | 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; | |
| 71 | 16 import dwtx.jface.viewers.IElementComparer; |
| 10 | 17 |
| 18 import tango.util.collection.ArraySeq; | |
| 19 import tango.util.collection.model.Seq; | |
| 20 import tango.util.collection.model.SeqView; | |
| 21 import tango.util.collection.model.Iterator; | |
| 22 | |
| 23 import dwtx.core.runtime.Assert; | |
| 24 import dwtx.jface.resource.JFaceResources; | |
| 25 | |
| 26 import dwt.dwthelper.utils; | |
| 27 | |
| 28 /** | |
| 29 * A concrete implementation of the <code>IStructuredSelection</code> interface, | |
| 30 * suitable for instantiating. | |
| 31 * <p> | |
| 32 * This class is not intended to be subclassed. | |
| 33 * </p> | |
| 34 */ | |
| 35 public class StructuredSelection : IStructuredSelection { | |
| 36 | |
| 37 /** | |
| 38 * The element that make up this structured selection. | |
| 39 */ | |
| 40 private Object[] elements; | |
| 41 | |
| 42 /** | |
|
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43 * The element comparer, or <code>null</code> |
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44 */ |
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45 private IElementComparer comparer; |
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46 |
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47 /** |
| 10 | 48 * The canonical empty selection. This selection should be used instead of |
| 49 * <code>null</code>. | |
| 50 */ | |
| 51 public static const StructuredSelection EMPTY; | |
| 52 static this(){ | |
| 53 EMPTY = new StructuredSelection(); | |
| 54 } | |
| 55 /** | |
| 56 * Creates a new empty selection. | |
| 57 * See also the static field <code>EMPTY</code> which contains an empty selection singleton. | |
| 58 * | |
| 59 * @see #EMPTY | |
| 60 */ | |
| 61 public this() { | |
| 62 } | |
| 63 | |
| 64 /** | |
| 65 * Creates a structured selection from the given elements. | |
| 66 * | |
| 67 * @param elements an array of elements | |
| 68 */ | |
| 69 public this(Object[] elements) { | |
| 70 this.elements = new Object[elements.length]; | |
| 71 System.arraycopy(elements, 0, this.elements, 0, elements.length); | |
| 72 } | |
| 73 | |
| 74 /** | |
| 75 * Creates a structured selection containing a single object. | |
| 76 * The object must not be <code>null</code>. | |
| 77 * | |
| 78 * @param element the element | |
| 79 */ | |
| 80 public this(Object element) { | |
| 81 Assert.isNotNull(element); | |
| 82 elements = [ element ]; | |
| 83 } | |
| 84 | |
| 85 /** | |
| 86 * Creates a structured selection from the given <code>List</code>. | |
| 87 * @param elements list of selected elements | |
| 88 */ | |
| 89 public this(SeqView!(Object) elements) { | |
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90 this(elements, null); |
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91 } |
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92 |
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93 /** |
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94 * Creates a structured selection from the given <code>List</code> and |
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95 * element comparer. If an element comparer is provided, it will be used to |
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96 * determine equality between structured selection objects provided that |
| 71 | 97 * they both are based on the same (identical) comparer. See bug |
| 98 * | |
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99 * @param elements |
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100 * list of selected elements |
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101 * @param comparer |
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102 * the comparer, or null |
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103 * @since 3.4 |
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104 */ |
| 71 | 105 public this(Seq!(Object) elements, IElementComparer comparer) { |
| 10 | 106 this.elements = elements.toArray(); |
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107 this.comparer = comparer; |
| 10 | 108 } |
| 109 | |
| 110 /** | |
| 111 * Returns whether this structured selection is equal to the given object. | |
| 112 * Two structured selections are equal if they contain the same elements | |
| 113 * in the same order. | |
| 114 * | |
| 115 * @param o the other object | |
| 116 * @return <code>true</code> if they are equal, and <code>false</code> otherwise | |
| 117 */ | |
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118 public override int opEquals(Object o) { |
| 10 | 119 if (this is o) { |
| 120 return true; | |
| 121 } | |
| 122 //null and other classes | |
| 123 if (!(cast(StructuredSelection)o )) { | |
| 124 return false; | |
| 125 } | |
| 126 StructuredSelection s2 = cast(StructuredSelection) o; | |
| 127 | |
| 128 // either or both empty? | |
| 129 if (isEmpty()) { | |
| 130 return s2.isEmpty(); | |
| 131 } | |
| 132 if (s2.isEmpty()) { | |
| 133 return false; | |
| 134 } | |
| 135 | |
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136 bool useComparer = comparer !is null && comparer is s2.comparer; |
| 71 | 137 |
| 10 | 138 //size |
| 139 int myLen = elements.length; | |
| 140 if (myLen !is s2.elements.length) { | |
| 141 return false; | |
| 142 } | |
| 143 //element comparison | |
| 144 for (int i = 0; i < myLen; i++) { | |
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145 if (useComparer) { |
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146 if (!comparer.equals(elements[i], s2.elements[i])) { |
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147 return false; |
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148 } |
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149 } else { |
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150 if (!elements[i].equals(s2.elements[i])) { |
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151 return false; |
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152 } |
| 10 | 153 } |
| 154 } | |
| 155 return true; | |
| 156 } | |
| 157 | |
| 158 /* (non-Javadoc) | |
| 159 * Method declared in IStructuredSelection. | |
| 160 */ | |
| 161 public Object getFirstElement() { | |
| 162 return isEmpty() ? null : elements[0]; | |
| 163 } | |
| 164 | |
| 165 /* (non-Javadoc) | |
| 166 * Method declared in ISelection. | |
| 167 */ | |
| 168 public bool isEmpty() { | |
| 169 return elements is null || elements.length is 0; | |
| 170 } | |
| 171 | |
| 172 /* (non-Javadoc) | |
| 173 * Method declared in IStructuredSelection. | |
| 174 */ | |
| 175 public Iterator!(Object) iterator() { | |
| 176 auto res = new ArraySeq!(Object); | |
| 177 res.capacity( elements.length ); | |
| 178 foreach( o; elements ){ | |
| 179 res.append( o ); | |
| 180 } | |
| 181 return res.elements; | |
| 182 } | |
| 183 | |
| 184 /* (non-Javadoc) | |
| 185 * Method declared in IStructuredSelection. | |
| 186 */ | |
| 187 public int size() { | |
| 188 return elements is null ? 0 : elements.length; | |
| 189 } | |
| 190 | |
| 191 /* (non-Javadoc) | |
| 192 * Method declared in IStructuredSelection. | |
| 193 */ | |
| 194 public Object[] toArray() { | |
| 195 return elements is null ? new Object[0] : elements.dup; | |
| 196 } | |
| 197 | |
| 198 /* (non-Javadoc) | |
| 199 * Method declared in IStructuredSelection. | |
| 200 */ | |
| 201 public SeqView!(Object) toList() { | |
| 202 auto res = new ArraySeq!(Object); | |
| 203 res.capacity( elements.length ); | |
| 204 foreach( o; elements ){ | |
| 205 res.append( o ); | |
| 206 } | |
| 207 return res; | |
| 208 } | |
| 209 | |
| 210 /** | |
| 211 * Internal method which returns a string representation of this | |
| 212 * selection suitable for debug purposes only. | |
| 213 * | |
| 214 * @return debug string | |
| 215 */ | |
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216 public override String toString() { |
| 10 | 217 return isEmpty() ? JFaceResources.getString("<empty_selection>") : (cast(Object)toList()).toString(); //$NON-NLS-1$ |
| 218 } | |
| 219 } |