|
129
|
1 /*******************************************************************************
|
|
|
2 * Copyright (c) 2000, 2005 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.TextSelection;
|
|
|
14
|
|
|
15 import dwt.dwthelper.utils;
|
|
|
16
|
|
|
17
|
|
|
18 /**
|
|
|
19 * Standard implementation of {@link dwtx.jface.text.ITextSelection}.
|
|
|
20 * <p>
|
|
|
21 * Makes advantage of the weak contract of correctness of its interface. If
|
|
|
22 * generated from a selection provider, it only remembers its offset and length
|
|
|
23 * and computes the remaining information on request.</p>
|
|
|
24 */
|
|
|
25 public class TextSelection : ITextSelection {
|
|
|
26
|
|
|
27 /** Internal empty text selection */
|
|
|
28 private final static ITextSelection NULL= new TextSelection();
|
|
|
29
|
|
|
30 /**
|
|
|
31 * Returns a shared instance of an empty text selection.
|
|
|
32 *
|
|
|
33 * @return a shared instance of an empty text selection
|
|
|
34 */
|
|
|
35 public static ITextSelection emptySelection() {
|
|
|
36 return NULL;
|
|
|
37 }
|
|
|
38
|
|
|
39 /** Document which delivers the data of the selection */
|
|
|
40 private IDocument fDocument;
|
|
|
41 /** Offset of the selection */
|
|
|
42 private int fOffset;
|
|
|
43 /** Length of the selection */
|
|
|
44 private int fLength;
|
|
|
45
|
|
|
46
|
|
|
47 /**
|
|
|
48 * Creates an empty text selection.
|
|
|
49 */
|
|
|
50 private TextSelection() {
|
|
|
51 this(null, -1, -1);
|
|
|
52 }
|
|
|
53
|
|
|
54 /**
|
|
|
55 * Creates a text selection for the given range. This
|
|
|
56 * selection object describes generically a text range and
|
|
|
57 * is intended to be an argument for the <code>setSelection</code>
|
|
|
58 * method of selection providers.
|
|
|
59 *
|
|
|
60 * @param offset the offset of the range
|
|
|
61 * @param length the length of the range
|
|
|
62 */
|
|
|
63 public TextSelection(int offset, int length) {
|
|
|
64 this(null, offset, length);
|
|
|
65 }
|
|
|
66
|
|
|
67 /**
|
|
|
68 * Creates a text selection for the given range of the given document.
|
|
|
69 * This selection object is created by selection providers in responds
|
|
|
70 * <code>getSelection</code>.
|
|
|
71 *
|
|
|
72 * @param document the document whose text range is selected in a viewer
|
|
|
73 * @param offset the offset of the selected range
|
|
|
74 * @param length the length of the selected range
|
|
|
75 */
|
|
|
76 public TextSelection(IDocument document, int offset, int length) {
|
|
|
77 fDocument= document;
|
|
|
78 fOffset= offset;
|
|
|
79 fLength= length;
|
|
|
80 }
|
|
|
81
|
|
|
82 /**
|
|
|
83 *
|
|
|
84 * Returns true if the offset and length are smaller than 0.
|
|
|
85 * A selection of length 0, is a valid text selection as it
|
|
|
86 * describes, e.g., the cursor position in a viewer.
|
|
|
87 *
|
|
|
88 * @return <code>true</code> if this selection is empty
|
|
|
89 * @see dwtx.jface.viewers.ISelection#isEmpty()
|
|
|
90 */
|
|
|
91 public bool isEmpty() {
|
|
|
92 return fOffset < 0 || fLength < 0;
|
|
|
93 }
|
|
|
94
|
|
|
95 /*
|
|
|
96 * @see dwtx.jface.text.ITextSelection#getOffset()
|
|
|
97 */
|
|
|
98 public int getOffset() {
|
|
|
99 return fOffset;
|
|
|
100 }
|
|
|
101
|
|
|
102 /*
|
|
|
103 * @see dwtx.jface.text.ITextSelection#getLength()
|
|
|
104 */
|
|
|
105 public int getLength() {
|
|
|
106 return fLength;
|
|
|
107 }
|
|
|
108
|
|
|
109 /*
|
|
|
110 * @see dwtx.jface.text.ITextSelection#getStartLine()
|
|
|
111 */
|
|
|
112 public int getStartLine() {
|
|
|
113
|
|
|
114 try {
|
|
|
115 if (fDocument !is null)
|
|
|
116 return fDocument.getLineOfOffset(fOffset);
|
|
|
117 } catch (BadLocationException x) {
|
|
|
118 }
|
|
|
119
|
|
|
120 return -1;
|
|
|
121 }
|
|
|
122
|
|
|
123 /*
|
|
|
124 * @see dwtx.jface.text.ITextSelection#getEndLine()
|
|
|
125 */
|
|
|
126 public int getEndLine() {
|
|
|
127 try {
|
|
|
128 if (fDocument !is null) {
|
|
|
129 int endOffset= fOffset + fLength;
|
|
|
130 if (fLength !is 0)
|
|
|
131 endOffset--;
|
|
|
132 return fDocument.getLineOfOffset(endOffset);
|
|
|
133 }
|
|
|
134 } catch (BadLocationException x) {
|
|
|
135 }
|
|
|
136
|
|
|
137 return -1;
|
|
|
138 }
|
|
|
139
|
|
|
140 /*
|
|
|
141 * @see dwtx.jface.text.ITextSelection#getText()
|
|
|
142 */
|
|
|
143 public String getText() {
|
|
|
144 try {
|
|
|
145 if (fDocument !is null)
|
|
|
146 return fDocument.get(fOffset, fLength);
|
|
|
147 } catch (BadLocationException x) {
|
|
|
148 }
|
|
|
149
|
|
|
150 return null;
|
|
|
151 }
|
|
|
152
|
|
|
153 /*
|
|
|
154 * @see java.lang.Object#equals(Object)
|
|
|
155 */
|
|
|
156 public bool equals(Object obj) {
|
|
|
157 if (obj is this)
|
|
|
158 return true;
|
|
|
159
|
|
|
160 if (obj is null || getClass() !is obj.getClass())
|
|
|
161 return false;
|
|
|
162
|
|
|
163 TextSelection s= (TextSelection) obj;
|
|
|
164 bool sameRange= (s.fOffset is fOffset && s.fLength is fLength);
|
|
|
165 if (sameRange) {
|
|
|
166
|
|
|
167 if (s.fDocument is null && fDocument is null)
|
|
|
168 return true;
|
|
|
169 if (s.fDocument is null || fDocument is null)
|
|
|
170 return false;
|
|
|
171
|
|
|
172 try {
|
|
|
173 String sContent= s.fDocument.get(fOffset, fLength);
|
|
|
174 String content= fDocument.get(fOffset, fLength);
|
|
|
175 return sContent.equals(content);
|
|
|
176 } catch (BadLocationException x) {
|
|
|
177 }
|
|
|
178 }
|
|
|
179
|
|
|
180 return false;
|
|
|
181 }
|
|
|
182
|
|
|
183 /*
|
|
|
184 * @see java.lang.Object#hashCode()
|
|
|
185 */
|
|
|
186 public int hashCode() {
|
|
|
187 int low= fDocument !is null ? fDocument.hashCode() : 0;
|
|
|
188 return (fOffset << 24) | (fLength << 16) | low;
|
|
|
189 }
|
|
|
190 }
|
|
|
191
|
