Mercurial > projects > dwt-addons
annotate dwtx/jface/text/projection/FragmentUpdater.d @ 133:7d818bd32d63
Fix ctors to this with gvim regexp
author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 24 Aug 2008 01:29:22 +0200 |
parents | c4fb132a086c |
children | 1a5b8f8129df |
rev | line source |
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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.projection.FragmentUpdater; | |
14 | |
131 | 15 import dwtx.jface.text.projection.ProjectionMapping; // packageimport |
16 import dwtx.jface.text.projection.ChildDocumentManager; // packageimport | |
17 import dwtx.jface.text.projection.SegmentUpdater; // packageimport | |
18 import dwtx.jface.text.projection.Segment; // packageimport | |
19 import dwtx.jface.text.projection.ProjectionDocument; // packageimport | |
20 import dwtx.jface.text.projection.ProjectionDocumentEvent; // packageimport | |
21 import dwtx.jface.text.projection.ChildDocument; // packageimport | |
22 import dwtx.jface.text.projection.IMinimalMapping; // packageimport | |
23 import dwtx.jface.text.projection.Fragment; // packageimport | |
24 import dwtx.jface.text.projection.ProjectionTextStore; // packageimport | |
25 import dwtx.jface.text.projection.ProjectionDocumentManager; // packageimport | |
26 | |
27 | |
129 | 28 import dwt.dwthelper.utils; |
29 | |
30 | |
31 import dwtx.jface.text.BadLocationException; | |
32 import dwtx.jface.text.BadPositionCategoryException; | |
33 import dwtx.jface.text.DefaultPositionUpdater; | |
34 import dwtx.jface.text.DocumentEvent; | |
35 import dwtx.jface.text.IDocument; | |
36 import dwtx.jface.text.Position; | |
37 | |
38 | |
39 /** | |
40 * The position updater used to adapt the fragments of a master document. If an | |
41 * insertion happens at a fragment's offset, the fragment is extended rather | |
42 * than shifted. Also, the last fragment is extended if an insert operation | |
43 * happens at the end of the fragment. | |
44 * | |
45 * @since 3.0 | |
46 */ | |
47 class FragmentUpdater : DefaultPositionUpdater { | |
48 | |
49 /** Indicates whether the position being updated represents the last fragment. */ | |
50 private bool fIsLast= false; | |
51 | |
52 /** | |
53 * Creates the fragment updater for the given category. | |
54 * | |
55 * @param fragmentCategory the position category used for managing the fragments of a document | |
56 */ | |
133
7d818bd32d63
Fix ctors to this with gvim regexp
Frank Benoit <benoit@tionex.de>
parents:
131
diff
changeset
|
57 protected this(String fragmentCategory) { |
129 | 58 super(fragmentCategory); |
59 } | |
60 | |
61 /* | |
62 * @see dwtx.jface.text.IPositionUpdater#update(dwtx.jface.text.DocumentEvent) | |
63 */ | |
64 public void update(DocumentEvent event) { | |
65 | |
66 try { | |
67 | |
68 Position[] category= event.getDocument().getPositions(getCategory()); | |
69 | |
70 fOffset= event.getOffset(); | |
71 fLength= event.getLength(); | |
72 fReplaceLength= (event.getText() is null ? 0 : event.getText().length()); | |
73 fDocument= event.getDocument(); | |
74 | |
75 for (int i= 0; i < category.length; i++) { | |
76 | |
77 fPosition= category[i]; | |
78 fIsLast= (i is category.length -1); | |
79 | |
80 fOriginalPosition.offset= fPosition.offset; | |
81 fOriginalPosition.length= fPosition.length; | |
82 | |
83 if (notDeleted()) | |
84 adaptToReplace(); | |
85 } | |
86 | |
87 } catch (BadPositionCategoryException x) { | |
88 // do nothing | |
89 } | |
90 } | |
91 | |
92 /* | |
93 * @see dwtx.jface.text.DefaultPositionUpdater#adaptToInsert() | |
94 */ | |
95 protected void adaptToInsert() { | |
96 int myStart= fPosition.offset; | |
97 int myEnd= Math.max(myStart, fPosition.offset + fPosition.length - (fIsLast || isAffectingReplace() ? 0 : 1)); | |
98 | |
99 if (myEnd < fOffset) | |
100 return; | |
101 | |
102 if (fLength <= 0) { | |
103 | |
104 if (myStart <= fOffset) | |
105 fPosition.length += fReplaceLength; | |
106 else | |
107 fPosition.offset += fReplaceLength; | |
108 | |
109 } else { | |
110 | |
111 if (myStart <= fOffset && fOriginalPosition.offset <= fOffset) | |
112 fPosition.length += fReplaceLength; | |
113 else | |
114 fPosition.offset += fReplaceLength; | |
115 } | |
116 } | |
117 | |
118 /** | |
119 * Returns whether this updater considers any position affected by the given document event. A | |
120 * position is affected if <code>event</code> {@link Position#overlapsWith(int, int) overlaps} | |
121 * with it but not if the position is only shifted. | |
122 * | |
123 * @param event the event | |
124 * @return <code>true</code> if there is any affected position, <code>false</code> otherwise | |
125 */ | |
126 public bool affectsPositions(DocumentEvent event) { | |
127 IDocument document= event.getDocument(); | |
128 try { | |
129 | |
130 int index= document.computeIndexInCategory(getCategory(), event.getOffset()); | |
131 Position[] fragments= document.getPositions(getCategory()); | |
132 | |
133 if (0 < index) { | |
134 Position fragment= fragments[index - 1]; | |
135 if (fragment.overlapsWith(event.getOffset(), event.getLength())) | |
136 return true; | |
137 if (index is fragments.length && fragment.offset + fragment.length is event.getOffset()) | |
138 return true; | |
139 } | |
140 | |
141 if (index < fragments.length) { | |
142 Position fragment= fragments[index]; | |
143 return fragment.overlapsWith(event.getOffset(), event.getLength()); | |
144 } | |
145 | |
146 } catch (BadLocationException x) { | |
147 } catch (BadPositionCategoryException x) { | |
148 } | |
149 | |
150 return false; | |
151 } | |
152 } |