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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.DocumentPartitioningChangedEvent;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import java.util.HashMap;
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18 import java.util.Iterator;
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19 import java.util.Map;
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20
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21 import dwtx.core.runtime.Assert;
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22
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23 /**
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24 * Event describing the change of document partitionings.
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25 *
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26 * @see dwtx.jface.text.IDocumentExtension3
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27 * @since 3.0
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28 */
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29 public class DocumentPartitioningChangedEvent {
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30
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31 /** The document whose partitionings changed */
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32 private final IDocument fDocument;
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33 /** The map of partitionings to changed regions. */
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34 private final Map fMap= new HashMap();
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35
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36
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37 /**
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38 * Creates a new document partitioning changed event for the given document.
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39 * Initially this event is empty, i.e. does not describe any change.
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40 *
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41 * @param document the changed document
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42 */
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43 public DocumentPartitioningChangedEvent(IDocument document) {
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44 fDocument= document;
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45 }
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46
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47 /**
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48 * Returns the changed document.
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49 *
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50 * @return the changed document
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51 */
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52 public IDocument getDocument() {
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53 return fDocument;
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54 }
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55
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56 /**
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57 * Returns the changed region of the given partitioning or <code>null</code>
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58 * if the given partitioning did not change.
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59 *
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60 * @param partitioning the partitioning
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61 * @return the changed region of the given partitioning or <code>null</code>
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62 */
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63 public IRegion getChangedRegion(String partitioning) {
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64 return (IRegion) fMap.get(partitioning);
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65 }
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66
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67 /**
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68 * Returns the set of changed partitionings.
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69 *
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70 * @return the set of changed partitionings
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71 */
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72 public String[] getChangedPartitionings() {
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73 String[] partitionings= new String[fMap.size()];
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74 fMap.keySet().toArray(partitionings);
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75 return partitionings;
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76 }
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77
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78 /**
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79 * Sets the specified range as changed region for the given partitioning.
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80 *
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81 * @param partitioning the partitioning
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82 * @param offset the region offset
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83 * @param length the region length
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84 */
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85 public void setPartitionChange(String partitioning, int offset, int length) {
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86 Assert.isNotNull(partitioning);
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87 fMap.put(partitioning, new Region(offset, length));
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88 }
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89
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90 /**
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91 * Returns <code>true</code> if the set of changed partitionings is empty,
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92 * <code>false</code> otherwise.
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93 *
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94 * @return <code>true</code> if the set of changed partitionings is empty
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95 */
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96 public bool isEmpty() {
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97 return fMap.isEmpty();
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98 }
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99
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100 /**
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101 * Returns the coverage of this event. This is the minimal region that
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102 * contains all changed regions of all changed partitionings.
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103 *
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104 * @return the coverage of this event
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105 */
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106 public IRegion getCoverage() {
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107 if (fMap.isEmpty())
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108 return new Region(0, 0);
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109
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110 int offset= -1;
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111 int endOffset= -1;
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112 Iterator e= fMap.values().iterator();
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113 while (e.hasNext()) {
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114 IRegion r= (IRegion) e.next();
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115
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116 if (offset < 0 || r.getOffset() < offset)
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117 offset= r.getOffset();
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118
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119 int end= r.getOffset() + r.getLength();
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120 if (end > endOffset)
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121 endOffset= end;
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122 }
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123
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124 return new Region(offset, endOffset - offset);
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125 }
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126 }
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