Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/NonDeletingPositionUpdater.d @ 146:75302ef3f92f
final
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 24 Aug 2008 22:34:04 +0200 |
| parents | 7d818bd32d63 |
| children |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 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.internal.text.NonDeletingPositionUpdater; | |
| 14 | |
| 131 | 15 import dwtx.jface.internal.text.InternalAccessor; // packageimport |
| 16 import dwtx.jface.internal.text.StickyHoverManager; // packageimport | |
| 17 import dwtx.jface.internal.text.InformationControlReplacer; // packageimport | |
| 18 import dwtx.jface.internal.text.TableOwnerDrawSupport; // packageimport | |
| 19 import dwtx.jface.internal.text.DelayedInputChangeListener; // packageimport | |
| 20 | |
| 21 | |
| 129 | 22 import dwt.dwthelper.utils; |
| 23 | |
| 24 import dwtx.jface.text.BadPositionCategoryException; | |
| 25 import dwtx.jface.text.DocumentEvent; | |
| 26 import dwtx.jface.text.IPositionUpdater; | |
| 27 import dwtx.jface.text.Position; | |
| 28 | |
| 29 | |
| 30 /** | |
| 31 * A position updater that never deletes a position. If the region containing | |
| 32 * the position is deleted, the position is moved to the beginning/end (falling | |
| 33 * together) of the change. If the region containing the position is replaced, | |
| 34 * the position is placed at the same location inside the replacement text, but | |
| 35 * always inside the replacement text. | |
| 36 * | |
| 37 * @since 3.1 | |
| 38 */ | |
| 39 public final class NonDeletingPositionUpdater : IPositionUpdater { | |
| 40 /** The position category. */ | |
| 146 | 41 private const String fCategory; |
| 129 | 42 |
| 43 /** | |
| 44 * Creates a new updater for the given <code>category</code>. | |
| 45 * | |
| 46 * @param category the new category. | |
| 47 */ | |
|
133
7d818bd32d63
Fix ctors to this with gvim regexp
Frank Benoit <benoit@tionex.de>
parents:
131
diff
changeset
|
48 public this(String category) { |
| 129 | 49 fCategory= category; |
| 50 } | |
| 51 | |
| 52 /* | |
| 53 * @see dwtx.jface.text.IPositionUpdater#update(dwtx.jface.text.DocumentEvent) | |
| 54 */ | |
| 55 public void update(DocumentEvent event) { | |
| 56 | |
| 57 int eventOffset= event.getOffset(); | |
| 58 int eventOldEndOffset= eventOffset + event.getLength(); | |
| 59 int eventNewLength= event.getText() is null ? 0 : event.getText().length(); | |
| 60 int eventNewEndOffset= eventOffset + eventNewLength; | |
| 61 int deltaLength= eventNewLength - event.getLength(); | |
| 62 | |
| 63 try { | |
| 64 Position[] positions= event.getDocument().getPositions(fCategory); | |
| 65 | |
| 66 for (int i= 0; i !is positions.length; i++) { | |
| 67 | |
| 68 Position position= positions[i]; | |
| 69 | |
| 70 if (position.isDeleted()) | |
| 71 continue; | |
| 72 | |
| 73 int offset= position.getOffset(); | |
| 74 int length= position.getLength(); | |
| 75 int end= offset + length; | |
| 76 | |
| 77 if (offset > eventOldEndOffset) { | |
| 78 // position comes way after change - shift | |
| 79 position.setOffset(offset + deltaLength); | |
| 80 } else if (end < eventOffset) { | |
| 81 // position comes way before change - leave alone | |
| 82 } else if (offset <= eventOffset && end >= eventOldEndOffset) { | |
| 83 // event completely internal to the position - adjust length | |
| 84 position.setLength(length + deltaLength); | |
| 85 } else if (offset < eventOffset) { | |
| 86 // event extends over end of position - include the | |
| 87 // replacement text into the position | |
| 88 position.setLength(eventNewEndOffset - offset); | |
| 89 } else if (end > eventOldEndOffset) { | |
| 90 // event extends from before position into it - adjust | |
| 91 // offset and length, including the replacement text into | |
| 92 // the position | |
| 93 position.setOffset(eventOffset); | |
| 94 int deleted= eventOldEndOffset - offset; | |
| 95 position.setLength(length - deleted + eventNewLength); | |
| 96 } else { | |
| 97 // event comprises the position - keep it at the same | |
| 98 // position, but always inside the replacement text | |
| 99 int newOffset= Math.min(offset, eventNewEndOffset); | |
| 100 int newEndOffset= Math.min(end, eventNewEndOffset); | |
| 101 position.setOffset(newOffset); | |
| 102 position.setLength(newEndOffset - newOffset); | |
| 103 } | |
| 104 } | |
| 105 } catch (BadPositionCategoryException e) { | |
| 106 // ignore and return | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 /** | |
| 111 * Returns the position category. | |
| 112 * | |
| 113 * @return the position category | |
| 114 */ | |
| 115 public String getCategory() { | |
| 116 return fCategory; | |
| 117 } | |
| 118 } |