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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2008 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 * Anton Leherbauer (anton.leherbauer@windriver.com) - 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.CopyOnWriteTextStore;
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14
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131
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15 import dwtx.jface.text.IDocumentPartitioningListener; // packageimport
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16 import dwtx.jface.text.DefaultTextHover; // packageimport
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17 import dwtx.jface.text.AbstractInformationControl; // packageimport
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18 import dwtx.jface.text.TextUtilities; // packageimport
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19 import dwtx.jface.text.IInformationControlCreatorExtension; // packageimport
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20 import dwtx.jface.text.AbstractInformationControlManager; // packageimport
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21 import dwtx.jface.text.ITextViewerExtension2; // packageimport
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22 import dwtx.jface.text.IDocumentPartitioner; // packageimport
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23 import dwtx.jface.text.DefaultIndentLineAutoEditStrategy; // packageimport
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24 import dwtx.jface.text.ITextSelection; // packageimport
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25 import dwtx.jface.text.Document; // packageimport
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26 import dwtx.jface.text.FindReplaceDocumentAdapterContentProposalProvider; // packageimport
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27 import dwtx.jface.text.ITextListener; // packageimport
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28 import dwtx.jface.text.BadPartitioningException; // packageimport
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29 import dwtx.jface.text.ITextViewerExtension5; // packageimport
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30 import dwtx.jface.text.IDocumentPartitionerExtension3; // packageimport
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31 import dwtx.jface.text.IUndoManager; // packageimport
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32 import dwtx.jface.text.ITextHoverExtension2; // packageimport
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33 import dwtx.jface.text.IRepairableDocument; // packageimport
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34 import dwtx.jface.text.IRewriteTarget; // packageimport
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35 import dwtx.jface.text.DefaultPositionUpdater; // packageimport
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36 import dwtx.jface.text.RewriteSessionEditProcessor; // packageimport
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37 import dwtx.jface.text.TextViewerHoverManager; // packageimport
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38 import dwtx.jface.text.DocumentRewriteSession; // packageimport
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39 import dwtx.jface.text.TextViewer; // packageimport
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40 import dwtx.jface.text.ITextViewerExtension8; // packageimport
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41 import dwtx.jface.text.RegExMessages; // packageimport
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42 import dwtx.jface.text.IDelayedInputChangeProvider; // packageimport
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43 import dwtx.jface.text.ITextOperationTargetExtension; // packageimport
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44 import dwtx.jface.text.IWidgetTokenOwner; // packageimport
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45 import dwtx.jface.text.IViewportListener; // packageimport
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46 import dwtx.jface.text.GapTextStore; // packageimport
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47 import dwtx.jface.text.MarkSelection; // packageimport
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48 import dwtx.jface.text.IDocumentPartitioningListenerExtension; // packageimport
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49 import dwtx.jface.text.IDocumentAdapterExtension; // packageimport
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50 import dwtx.jface.text.IInformationControlExtension; // packageimport
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51 import dwtx.jface.text.IDocumentPartitioningListenerExtension2; // packageimport
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52 import dwtx.jface.text.DefaultDocumentAdapter; // packageimport
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53 import dwtx.jface.text.ITextViewerExtension3; // packageimport
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54 import dwtx.jface.text.IInformationControlCreator; // packageimport
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55 import dwtx.jface.text.TypedRegion; // packageimport
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56 import dwtx.jface.text.ISynchronizable; // packageimport
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57 import dwtx.jface.text.IMarkRegionTarget; // packageimport
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58 import dwtx.jface.text.TextViewerUndoManager; // packageimport
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59 import dwtx.jface.text.IRegion; // packageimport
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60 import dwtx.jface.text.IInformationControlExtension2; // packageimport
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61 import dwtx.jface.text.IDocumentExtension4; // packageimport
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62 import dwtx.jface.text.IDocumentExtension2; // packageimport
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63 import dwtx.jface.text.IDocumentPartitionerExtension2; // packageimport
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64 import dwtx.jface.text.Assert; // packageimport
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65 import dwtx.jface.text.DefaultInformationControl; // packageimport
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66 import dwtx.jface.text.IWidgetTokenOwnerExtension; // packageimport
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67 import dwtx.jface.text.DocumentClone; // packageimport
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68 import dwtx.jface.text.DefaultUndoManager; // packageimport
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69 import dwtx.jface.text.IFindReplaceTarget; // packageimport
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70 import dwtx.jface.text.IAutoEditStrategy; // packageimport
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71 import dwtx.jface.text.ILineTrackerExtension; // packageimport
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72 import dwtx.jface.text.IUndoManagerExtension; // packageimport
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73 import dwtx.jface.text.TextSelection; // packageimport
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74 import dwtx.jface.text.DefaultAutoIndentStrategy; // packageimport
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75 import dwtx.jface.text.IAutoIndentStrategy; // packageimport
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76 import dwtx.jface.text.IPainter; // packageimport
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77 import dwtx.jface.text.IInformationControl; // packageimport
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78 import dwtx.jface.text.IInformationControlExtension3; // packageimport
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79 import dwtx.jface.text.ITextViewerExtension6; // packageimport
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80 import dwtx.jface.text.IInformationControlExtension4; // packageimport
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81 import dwtx.jface.text.DefaultLineTracker; // packageimport
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82 import dwtx.jface.text.IDocumentInformationMappingExtension; // packageimport
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83 import dwtx.jface.text.IRepairableDocumentExtension; // packageimport
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84 import dwtx.jface.text.ITextHover; // packageimport
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85 import dwtx.jface.text.FindReplaceDocumentAdapter; // packageimport
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86 import dwtx.jface.text.ILineTracker; // packageimport
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87 import dwtx.jface.text.Line; // packageimport
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88 import dwtx.jface.text.ITextViewerExtension; // packageimport
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89 import dwtx.jface.text.IDocumentAdapter; // packageimport
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90 import dwtx.jface.text.TextEvent; // packageimport
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91 import dwtx.jface.text.BadLocationException; // packageimport
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92 import dwtx.jface.text.AbstractDocument; // packageimport
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93 import dwtx.jface.text.AbstractLineTracker; // packageimport
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94 import dwtx.jface.text.TreeLineTracker; // packageimport
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95 import dwtx.jface.text.ITextPresentationListener; // packageimport
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96 import dwtx.jface.text.Region; // packageimport
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97 import dwtx.jface.text.ITextViewer; // packageimport
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98 import dwtx.jface.text.IDocumentInformationMapping; // packageimport
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99 import dwtx.jface.text.MarginPainter; // packageimport
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100 import dwtx.jface.text.IPaintPositionManager; // packageimport
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101 import dwtx.jface.text.TextPresentation; // packageimport
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102 import dwtx.jface.text.IFindReplaceTargetExtension; // packageimport
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103 import dwtx.jface.text.ISlaveDocumentManagerExtension; // packageimport
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104 import dwtx.jface.text.ISelectionValidator; // packageimport
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105 import dwtx.jface.text.IDocumentExtension; // packageimport
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106 import dwtx.jface.text.PropagatingFontFieldEditor; // packageimport
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107 import dwtx.jface.text.ConfigurableLineTracker; // packageimport
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108 import dwtx.jface.text.SlaveDocumentEvent; // packageimport
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109 import dwtx.jface.text.IDocumentListener; // packageimport
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110 import dwtx.jface.text.PaintManager; // packageimport
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111 import dwtx.jface.text.IFindReplaceTargetExtension3; // packageimport
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112 import dwtx.jface.text.ITextDoubleClickStrategy; // packageimport
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113 import dwtx.jface.text.IDocumentExtension3; // packageimport
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114 import dwtx.jface.text.Position; // packageimport
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115 import dwtx.jface.text.TextMessages; // packageimport
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116 import dwtx.jface.text.WhitespaceCharacterPainter; // packageimport
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117 import dwtx.jface.text.IPositionUpdater; // packageimport
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118 import dwtx.jface.text.DefaultTextDoubleClickStrategy; // packageimport
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119 import dwtx.jface.text.ListLineTracker; // packageimport
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120 import dwtx.jface.text.ITextInputListener; // packageimport
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121 import dwtx.jface.text.BadPositionCategoryException; // packageimport
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122 import dwtx.jface.text.IWidgetTokenKeeperExtension; // packageimport
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123 import dwtx.jface.text.IInputChangedListener; // packageimport
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124 import dwtx.jface.text.ITextOperationTarget; // packageimport
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125 import dwtx.jface.text.IDocumentInformationMappingExtension2; // packageimport
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126 import dwtx.jface.text.ITextViewerExtension7; // packageimport
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127 import dwtx.jface.text.IInformationControlExtension5; // packageimport
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128 import dwtx.jface.text.IDocumentRewriteSessionListener; // packageimport
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129 import dwtx.jface.text.JFaceTextUtil; // packageimport
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130 import dwtx.jface.text.AbstractReusableInformationControlCreator; // packageimport
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131 import dwtx.jface.text.TabsToSpacesConverter; // packageimport
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132 import dwtx.jface.text.CursorLinePainter; // packageimport
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133 import dwtx.jface.text.ITextHoverExtension; // packageimport
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134 import dwtx.jface.text.IEventConsumer; // packageimport
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135 import dwtx.jface.text.IDocument; // packageimport
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136 import dwtx.jface.text.IWidgetTokenKeeper; // packageimport
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137 import dwtx.jface.text.DocumentCommand; // packageimport
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138 import dwtx.jface.text.TypedPosition; // packageimport
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139 import dwtx.jface.text.IEditingSupportRegistry; // packageimport
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140 import dwtx.jface.text.IDocumentPartitionerExtension; // packageimport
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141 import dwtx.jface.text.AbstractHoverInformationControlManager; // packageimport
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142 import dwtx.jface.text.IEditingSupport; // packageimport
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143 import dwtx.jface.text.IMarkSelection; // packageimport
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144 import dwtx.jface.text.ISlaveDocumentManager; // packageimport
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145 import dwtx.jface.text.DocumentEvent; // packageimport
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146 import dwtx.jface.text.DocumentPartitioningChangedEvent; // packageimport
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147 import dwtx.jface.text.ITextStore; // packageimport
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148 import dwtx.jface.text.JFaceTextMessages; // packageimport
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149 import dwtx.jface.text.DocumentRewriteSessionEvent; // packageimport
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150 import dwtx.jface.text.SequentialRewriteTextStore; // packageimport
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151 import dwtx.jface.text.DocumentRewriteSessionType; // packageimport
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152 import dwtx.jface.text.TextAttribute; // packageimport
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153 import dwtx.jface.text.ITextViewerExtension4; // packageimport
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154 import dwtx.jface.text.ITypedRegion; // packageimport
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155
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156
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129
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157 import dwt.dwthelper.utils;
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158
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159 import dwtx.core.runtime.Assert;
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160
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161
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162 /**
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163 * Copy-on-write <code>ITextStore</code> wrapper.
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164 * <p>
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165 * This implementation uses an unmodifiable text store for the initial content.
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166 * Upon first modification attempt, the unmodifiable store is replaced with
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167 * a modifiable instance which must be supplied in the constructor.</p>
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168 * <p>
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169 * This class is not intended to be subclassed.
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170 * </p>
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171 *
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172 * @since 3.2
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173 * @noextend This class is not intended to be subclassed by clients.
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174 */
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175 public class CopyOnWriteTextStore : ITextStore {
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176
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177 /**
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178 * An unmodifiable String based text store. It is not possible to modify the content
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179 * other than using {@link #set}. Trying to {@link #replace} a text range will
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180 * throw an <code>UnsupportedOperationException</code>.
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181 */
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182 private static class StringTextStore : ITextStore {
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183
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184 /** Represents the content of this text store. */
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185 private String fText= ""; //$NON-NLS-1$
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186
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187 /**
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188 * Create an empty text store.
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189 */
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190 private StringTextStore() {
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191 super();
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192 }
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193
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194 /**
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195 * Create a text store with initial content.
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196 * @param text the initial content
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197 */
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198 private StringTextStore(String text) {
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199 super();
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200 set(text);
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201 }
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202
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203 /*
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204 * @see dwtx.jface.text.ITextStore#get(int)
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205 */
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206 public char get(int offset) {
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207 return fText.charAt(offset);
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208 }
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209
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210 /*
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211 * @see dwtx.jface.text.ITextStore#get(int, int)
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212 */
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213 public String get(int offset, int length) {
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214 return fText.substring(offset, offset + length);
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215 }
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216
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217 /*
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218 * @see dwtx.jface.text.ITextStore#getLength()
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219 */
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220 public int getLength() {
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221 return fText.length();
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222 }
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223
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224 /*
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225 * @see dwtx.jface.text.ITextStore#replace(int, int, java.lang.String)
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226 */
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227 public void replace(int offset, int length, String text) {
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228 // modification not supported
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229 throw new UnsupportedOperationException();
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230 }
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231
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232 /*
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233 * @see dwtx.jface.text.ITextStore#set(java.lang.String)
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234 */
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235 public void set(String text) {
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236 fText= text !is null ? text : ""; //$NON-NLS-1$
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237 }
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238
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239 }
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240
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241 /** The underlying "real" text store */
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242 protected ITextStore fTextStore= new StringTextStore();
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243
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244 /** A modifiable <code>ITextStore</code> instance */
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245 private final ITextStore fModifiableTextStore;
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246
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247 /**
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248 * Creates an empty text store. The given text store will be used upon first
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249 * modification attempt.
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250 *
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251 * @param modifiableTextStore
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252 * a modifiable <code>ITextStore</code> instance, may not be
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253 * <code>null</code>
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254 */
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255 public CopyOnWriteTextStore(ITextStore modifiableTextStore) {
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256 Assert.isNotNull(modifiableTextStore);
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257 fTextStore= new StringTextStore();
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258 fModifiableTextStore= modifiableTextStore;
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259 }
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260
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261 /*
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262 * @see dwtx.jface.text.ITextStore#get(int)
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263 */
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264 public char get(int offset) {
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265 return fTextStore.get(offset);
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266 }
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267
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268 /*
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269 * @see dwtx.jface.text.ITextStore#get(int, int)
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270 */
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271 public String get(int offset, int length) {
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272 return fTextStore.get(offset, length);
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273 }
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274
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275 /*
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276 * @see dwtx.jface.text.ITextStore#getLength()
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277 */
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278 public int getLength() {
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279 return fTextStore.getLength();
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280 }
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281
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282 /*
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283 * @see dwtx.jface.text.ITextStore#replace(int, int, java.lang.String)
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284 */
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285 public void replace(int offset, int length, String text) {
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286 if (fTextStore !is fModifiableTextStore) {
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287 String content= fTextStore.get(0, fTextStore.getLength());
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288 fTextStore= fModifiableTextStore;
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289 fTextStore.set(content);
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290 }
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291 fTextStore.replace(offset, length, text);
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292 }
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293
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294 /*
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295 * @see dwtx.jface.text.ITextStore#set(java.lang.String)
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296 */
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297 public void set(String text) {
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298 fTextStore= new StringTextStore(text);
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299 fModifiableTextStore.set(""); //$NON-NLS-1$
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300 }
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301
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302 }
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