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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 * 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.DefaultTextHover;
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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.AbstractInformationControl; // packageimport
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17 import dwtx.jface.text.TextUtilities; // packageimport
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18 import dwtx.jface.text.IInformationControlCreatorExtension; // packageimport
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19 import dwtx.jface.text.AbstractInformationControlManager; // packageimport
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20 import dwtx.jface.text.ITextViewerExtension2; // packageimport
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21 import dwtx.jface.text.IDocumentPartitioner; // packageimport
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22 import dwtx.jface.text.DefaultIndentLineAutoEditStrategy; // packageimport
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23 import dwtx.jface.text.ITextSelection; // packageimport
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24 import dwtx.jface.text.Document; // packageimport
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25 import dwtx.jface.text.FindReplaceDocumentAdapterContentProposalProvider; // packageimport
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26 import dwtx.jface.text.ITextListener; // packageimport
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27 import dwtx.jface.text.BadPartitioningException; // packageimport
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28 import dwtx.jface.text.ITextViewerExtension5; // packageimport
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29 import dwtx.jface.text.IDocumentPartitionerExtension3; // packageimport
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30 import dwtx.jface.text.IUndoManager; // packageimport
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31 import dwtx.jface.text.ITextHoverExtension2; // packageimport
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32 import dwtx.jface.text.IRepairableDocument; // packageimport
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33 import dwtx.jface.text.IRewriteTarget; // packageimport
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34 import dwtx.jface.text.DefaultPositionUpdater; // packageimport
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35 import dwtx.jface.text.RewriteSessionEditProcessor; // packageimport
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36 import dwtx.jface.text.TextViewerHoverManager; // packageimport
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37 import dwtx.jface.text.DocumentRewriteSession; // packageimport
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38 import dwtx.jface.text.TextViewer; // packageimport
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39 import dwtx.jface.text.ITextViewerExtension8; // packageimport
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40 import dwtx.jface.text.RegExMessages; // packageimport
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41 import dwtx.jface.text.IDelayedInputChangeProvider; // packageimport
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42 import dwtx.jface.text.ITextOperationTargetExtension; // packageimport
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43 import dwtx.jface.text.IWidgetTokenOwner; // packageimport
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44 import dwtx.jface.text.IViewportListener; // packageimport
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45 import dwtx.jface.text.GapTextStore; // packageimport
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46 import dwtx.jface.text.MarkSelection; // packageimport
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47 import dwtx.jface.text.IDocumentPartitioningListenerExtension; // packageimport
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48 import dwtx.jface.text.IDocumentAdapterExtension; // packageimport
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49 import dwtx.jface.text.IInformationControlExtension; // packageimport
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50 import dwtx.jface.text.IDocumentPartitioningListenerExtension2; // packageimport
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51 import dwtx.jface.text.DefaultDocumentAdapter; // packageimport
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52 import dwtx.jface.text.ITextViewerExtension3; // packageimport
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53 import dwtx.jface.text.IInformationControlCreator; // packageimport
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54 import dwtx.jface.text.TypedRegion; // packageimport
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55 import dwtx.jface.text.ISynchronizable; // packageimport
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56 import dwtx.jface.text.IMarkRegionTarget; // packageimport
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57 import dwtx.jface.text.TextViewerUndoManager; // packageimport
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58 import dwtx.jface.text.IRegion; // packageimport
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59 import dwtx.jface.text.IInformationControlExtension2; // packageimport
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60 import dwtx.jface.text.IDocumentExtension4; // packageimport
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61 import dwtx.jface.text.IDocumentExtension2; // packageimport
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62 import dwtx.jface.text.IDocumentPartitionerExtension2; // packageimport
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63 import dwtx.jface.text.Assert; // packageimport
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64 import dwtx.jface.text.DefaultInformationControl; // packageimport
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65 import dwtx.jface.text.IWidgetTokenOwnerExtension; // packageimport
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66 import dwtx.jface.text.DocumentClone; // packageimport
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67 import dwtx.jface.text.DefaultUndoManager; // packageimport
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68 import dwtx.jface.text.IFindReplaceTarget; // packageimport
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69 import dwtx.jface.text.IAutoEditStrategy; // packageimport
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70 import dwtx.jface.text.ILineTrackerExtension; // packageimport
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71 import dwtx.jface.text.IUndoManagerExtension; // packageimport
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72 import dwtx.jface.text.TextSelection; // 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 import java.util.Iterator;
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160
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161 import dwtx.core.runtime.Assert;
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162 import dwtx.jface.text.source.Annotation;
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163 import dwtx.jface.text.source.IAnnotationModel;
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164 import dwtx.jface.text.source.ISourceViewer;
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165 import dwtx.jface.text.source.ISourceViewerExtension2;
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166
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167 /**
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168 * Standard implementation of {@link dwtx.jface.text.ITextHover}.
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169 *
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170 * @since 3.2
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171 */
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172 public class DefaultTextHover : ITextHover {
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173
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174 /** This hover's source viewer */
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175 private ISourceViewer fSourceViewer;
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176
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177 /**
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178 * Creates a new annotation hover.
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179 *
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180 * @param sourceViewer this hover's annotation model
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181 */
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182 public DefaultTextHover(ISourceViewer sourceViewer) {
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183 Assert.isNotNull(sourceViewer);
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184 fSourceViewer= sourceViewer;
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185 }
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186
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187 /*
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188 * @see dwtx.jface.text.ITextHover#getHoverInfo(dwtx.jface.text.ITextViewer, dwtx.jface.text.IRegion)
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189 */
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190 public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
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191 IAnnotationModel model= getAnnotationModel(fSourceViewer);
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192 if (model is null)
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193 return null;
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194
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195 Iterator e= model.getAnnotationIterator();
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196 while (e.hasNext()) {
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197 Annotation a= (Annotation) e.next();
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198 if (isIncluded(a)) {
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199 Position p= model.getPosition(a);
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200 if (p !is null && p.overlapsWith(hoverRegion.getOffset(), hoverRegion.getLength())) {
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201 String msg= a.getText();
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202 if (msg !is null && msg.trim().length() > 0)
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203 return msg;
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204 }
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205 }
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206 }
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207
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208 return null;
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209 }
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210
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211 /*
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212 * @see dwtx.jface.text.ITextHover#getHoverRegion(dwtx.jface.text.ITextViewer, int)
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213 */
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214 public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
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215 return findWord(textViewer.getDocument(), offset);
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216 }
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217
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218 /**
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219 * Tells whether the annotation should be included in
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220 * the computation.
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221 *
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222 * @param annotation the annotation to test
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223 * @return <code>true</code> if the annotation is included in the computation
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224 */
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225 protected bool isIncluded(Annotation annotation) {
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226 return true;
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227 }
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228
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229 private IAnnotationModel getAnnotationModel(ISourceViewer viewer) {
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230 if (viewer instanceof ISourceViewerExtension2) {
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231 ISourceViewerExtension2 extension= (ISourceViewerExtension2) viewer;
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232 return extension.getVisualAnnotationModel();
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233 }
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234 return viewer.getAnnotationModel();
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235 }
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236
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237 private IRegion findWord(IDocument document, int offset) {
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238 int start= -2;
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239 int end= -1;
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240
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241 try {
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242
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243 int pos= offset;
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244 char c;
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245
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246 while (pos >= 0) {
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247 c= document.getChar(pos);
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248 if (!Character.isUnicodeIdentifierPart(c))
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249 break;
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250 --pos;
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251 }
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252
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253 start= pos;
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254
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255 pos= offset;
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256 int length= document.getLength();
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257
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258 while (pos < length) {
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259 c= document.getChar(pos);
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260 if (!Character.isUnicodeIdentifierPart(c))
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261 break;
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262 ++pos;
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263 }
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264
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265 end= pos;
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266
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267 } catch (BadLocationException x) {
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268 }
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269
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270 if (start >= -1 && end > -1) {
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271 if (start is offset && end is offset)
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272 return new Region(offset, 0);
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273 else if (start is offset)
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274 return new Region(start, end - start);
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275 else
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276 return new Region(start + 1, end - start - 1);
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277 }
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278
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279 return null;
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280 }
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281 }
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