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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 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.TextSelection;
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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.DefaultAutoIndentStrategy; // packageimport
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74 import dwtx.jface.text.IAutoIndentStrategy; // packageimport
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75 import dwtx.jface.text.IPainter; // packageimport
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76 import dwtx.jface.text.IInformationControl; // packageimport
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77 import dwtx.jface.text.IInformationControlExtension3; // packageimport
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78 import dwtx.jface.text.ITextViewerExtension6; // packageimport
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79 import dwtx.jface.text.IInformationControlExtension4; // packageimport
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80 import dwtx.jface.text.DefaultLineTracker; // packageimport
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81 import dwtx.jface.text.IDocumentInformationMappingExtension; // packageimport
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82 import dwtx.jface.text.IRepairableDocumentExtension; // packageimport
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83 import dwtx.jface.text.ITextHover; // packageimport
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84 import dwtx.jface.text.FindReplaceDocumentAdapter; // packageimport
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85 import dwtx.jface.text.ILineTracker; // packageimport
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86 import dwtx.jface.text.Line; // packageimport
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87 import dwtx.jface.text.ITextViewerExtension; // packageimport
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88 import dwtx.jface.text.IDocumentAdapter; // packageimport
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89 import dwtx.jface.text.TextEvent; // packageimport
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90 import dwtx.jface.text.BadLocationException; // packageimport
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91 import dwtx.jface.text.AbstractDocument; // packageimport
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92 import dwtx.jface.text.AbstractLineTracker; // packageimport
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93 import dwtx.jface.text.TreeLineTracker; // packageimport
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94 import dwtx.jface.text.ITextPresentationListener; // packageimport
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95 import dwtx.jface.text.Region; // packageimport
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96 import dwtx.jface.text.ITextViewer; // packageimport
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97 import dwtx.jface.text.IDocumentInformationMapping; // packageimport
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98 import dwtx.jface.text.MarginPainter; // packageimport
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99 import dwtx.jface.text.IPaintPositionManager; // packageimport
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100 import dwtx.jface.text.TextPresentation; // packageimport
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101 import dwtx.jface.text.IFindReplaceTargetExtension; // packageimport
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102 import dwtx.jface.text.ISlaveDocumentManagerExtension; // packageimport
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103 import dwtx.jface.text.ISelectionValidator; // packageimport
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104 import dwtx.jface.text.IDocumentExtension; // packageimport
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105 import dwtx.jface.text.PropagatingFontFieldEditor; // packageimport
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106 import dwtx.jface.text.ConfigurableLineTracker; // packageimport
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107 import dwtx.jface.text.SlaveDocumentEvent; // packageimport
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108 import dwtx.jface.text.IDocumentListener; // packageimport
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109 import dwtx.jface.text.PaintManager; // packageimport
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110 import dwtx.jface.text.IFindReplaceTargetExtension3; // packageimport
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111 import dwtx.jface.text.ITextDoubleClickStrategy; // packageimport
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112 import dwtx.jface.text.IDocumentExtension3; // packageimport
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113 import dwtx.jface.text.Position; // packageimport
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114 import dwtx.jface.text.TextMessages; // packageimport
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115 import dwtx.jface.text.CopyOnWriteTextStore; // 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
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160 /**
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161 * Standard implementation of {@link dwtx.jface.text.ITextSelection}.
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162 * <p>
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163 * Makes advantage of the weak contract of correctness of its interface. If
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164 * generated from a selection provider, it only remembers its offset and length
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165 * and computes the remaining information on request.</p>
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166 */
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167 public class TextSelection : ITextSelection {
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168
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169 /** Internal empty text selection */
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170 private final static ITextSelection NULL= new TextSelection();
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171
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172 /**
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173 * Returns a shared instance of an empty text selection.
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174 *
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175 * @return a shared instance of an empty text selection
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176 */
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177 public static ITextSelection emptySelection() {
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178 return NULL;
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179 }
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180
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181 /** Document which delivers the data of the selection */
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182 private IDocument fDocument;
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183 /** Offset of the selection */
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184 private int fOffset;
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185 /** Length of the selection */
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186 private int fLength;
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187
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188
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189 /**
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190 * Creates an empty text selection.
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191 */
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192 private TextSelection() {
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193 this(null, -1, -1);
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194 }
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195
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196 /**
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197 * Creates a text selection for the given range. This
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198 * selection object describes generically a text range and
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199 * is intended to be an argument for the <code>setSelection</code>
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200 * method of selection providers.
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201 *
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202 * @param offset the offset of the range
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203 * @param length the length of the range
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204 */
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205 public TextSelection(int offset, int length) {
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206 this(null, offset, length);
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207 }
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208
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209 /**
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210 * Creates a text selection for the given range of the given document.
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211 * This selection object is created by selection providers in responds
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212 * <code>getSelection</code>.
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213 *
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214 * @param document the document whose text range is selected in a viewer
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215 * @param offset the offset of the selected range
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216 * @param length the length of the selected range
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217 */
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218 public TextSelection(IDocument document, int offset, int length) {
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219 fDocument= document;
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220 fOffset= offset;
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221 fLength= length;
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222 }
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223
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224 /**
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225 *
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226 * Returns true if the offset and length are smaller than 0.
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227 * A selection of length 0, is a valid text selection as it
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228 * describes, e.g., the cursor position in a viewer.
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229 *
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230 * @return <code>true</code> if this selection is empty
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231 * @see dwtx.jface.viewers.ISelection#isEmpty()
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232 */
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233 public bool isEmpty() {
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234 return fOffset < 0 || fLength < 0;
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235 }
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236
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237 /*
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238 * @see dwtx.jface.text.ITextSelection#getOffset()
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239 */
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240 public int getOffset() {
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241 return fOffset;
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242 }
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243
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244 /*
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245 * @see dwtx.jface.text.ITextSelection#getLength()
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246 */
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247 public int getLength() {
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248 return fLength;
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249 }
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250
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251 /*
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252 * @see dwtx.jface.text.ITextSelection#getStartLine()
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253 */
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254 public int getStartLine() {
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255
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256 try {
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257 if (fDocument !is null)
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258 return fDocument.getLineOfOffset(fOffset);
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259 } catch (BadLocationException x) {
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260 }
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261
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262 return -1;
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263 }
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264
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265 /*
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266 * @see dwtx.jface.text.ITextSelection#getEndLine()
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267 */
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268 public int getEndLine() {
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269 try {
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270 if (fDocument !is null) {
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271 int endOffset= fOffset + fLength;
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272 if (fLength !is 0)
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273 endOffset--;
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274 return fDocument.getLineOfOffset(endOffset);
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275 }
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276 } catch (BadLocationException x) {
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277 }
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278
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279 return -1;
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280 }
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281
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282 /*
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283 * @see dwtx.jface.text.ITextSelection#getText()
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284 */
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285 public String getText() {
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286 try {
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287 if (fDocument !is null)
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288 return fDocument.get(fOffset, fLength);
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289 } catch (BadLocationException x) {
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290 }
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291
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292 return null;
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293 }
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294
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295 /*
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296 * @see java.lang.Object#equals(Object)
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297 */
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298 public bool equals(Object obj) {
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299 if (obj is this)
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300 return true;
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301
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302 if (obj is null || getClass() !is obj.getClass())
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303 return false;
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304
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305 TextSelection s= (TextSelection) obj;
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306 bool sameRange= (s.fOffset is fOffset && s.fLength is fLength);
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307 if (sameRange) {
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308
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309 if (s.fDocument is null && fDocument is null)
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310 return true;
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311 if (s.fDocument is null || fDocument is null)
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312 return false;
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313
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314 try {
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315 String sContent= s.fDocument.get(fOffset, fLength);
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316 String content= fDocument.get(fOffset, fLength);
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317 return sContent.equals(content);
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318 } catch (BadLocationException x) {
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319 }
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320 }
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321
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322 return false;
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323 }
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324
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325 /*
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326 * @see java.lang.Object#hashCode()
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327 */
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328 public int hashCode() {
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329 int low= fDocument !is null ? fDocument.hashCode() : 0;
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330 return (fOffset << 24) | (fLength << 16) | low;
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331 }
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332 }
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333
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