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annotate org.eclipse.text/src/org/eclipse/jface/text/AbstractLineTracker.d @ 17:6f068362a363

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Remove direct import of tango.text.convert.Format
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 09:09:23 +0100
parents c4b1a29263fc
children
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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 org.eclipse.jface.text.AbstractLineTracker;
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14 import org.eclipse.jface.text.IRepairableDocument;
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15 import org.eclipse.jface.text.AbstractDocument;
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16 import org.eclipse.jface.text.IDocumentPartitionerExtension3;
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17 import org.eclipse.jface.text.ConfigurableLineTracker;
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18 import org.eclipse.jface.text.IRegion;
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19 import org.eclipse.jface.text.TypedRegion;
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20 import org.eclipse.jface.text.IDocumentExtension2;
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21 import org.eclipse.jface.text.TypedPosition;
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22 import org.eclipse.jface.text.RewriteSessionEditProcessor;
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23 import org.eclipse.jface.text.SlaveDocumentEvent;
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24 import org.eclipse.jface.text.IDocumentExtension3;
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25 import org.eclipse.jface.text.IDocumentListener;
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26 import org.eclipse.jface.text.ISynchronizable;
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27 import org.eclipse.jface.text.DocumentEvent;
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28 import org.eclipse.jface.text.Position;
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29 import org.eclipse.jface.text.IRepairableDocumentExtension;
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30 import org.eclipse.jface.text.DocumentRewriteSessionType;
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31 import org.eclipse.jface.text.Region;
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32 import org.eclipse.jface.text.IDocumentExtension4;
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33 import org.eclipse.jface.text.BadLocationException;
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34 import org.eclipse.jface.text.TextMessages;
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35 import org.eclipse.jface.text.IDocumentPartitioningListenerExtension2;
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36 import org.eclipse.jface.text.IDocumentInformationMappingExtension;
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37 import org.eclipse.jface.text.IDocumentPartitioningListenerExtension;
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38 import org.eclipse.jface.text.ITextStore;
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39 import org.eclipse.jface.text.IDocumentPartitionerExtension;
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40 import org.eclipse.jface.text.DocumentRewriteSession;
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41 import org.eclipse.jface.text.IPositionUpdater;
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42 import org.eclipse.jface.text.ISlaveDocumentManagerExtension;
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43 import org.eclipse.jface.text.ILineTracker;
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44 import org.eclipse.jface.text.ListLineTracker;
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45 import org.eclipse.jface.text.IDocumentInformationMapping;
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46 import org.eclipse.jface.text.IDocumentRewriteSessionListener;
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47 import org.eclipse.jface.text.DefaultLineTracker;
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48 import org.eclipse.jface.text.BadPositionCategoryException;
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49 import org.eclipse.jface.text.BadPartitioningException;
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50 import org.eclipse.jface.text.SequentialRewriteTextStore;
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51 import org.eclipse.jface.text.IDocumentInformationMappingExtension2;
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52 import org.eclipse.jface.text.DocumentPartitioningChangedEvent;
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53 import org.eclipse.jface.text.FindReplaceDocumentAdapter;
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54 import org.eclipse.jface.text.TextUtilities;
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55 import org.eclipse.jface.text.ISlaveDocumentManager;
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56 import org.eclipse.jface.text.IDocument;
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57 import org.eclipse.jface.text.ILineTrackerExtension;
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58 import org.eclipse.jface.text.IDocumentPartitioner;
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59 import org.eclipse.jface.text.GapTextStore;
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60 import org.eclipse.jface.text.Document;
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61 import org.eclipse.jface.text.IDocumentExtension;
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62 import org.eclipse.jface.text.IDocumentPartitioningListener;
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63 import org.eclipse.jface.text.CopyOnWriteTextStore;
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64 import org.eclipse.jface.text.DefaultPositionUpdater;
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65 import org.eclipse.jface.text.Line;
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66 import org.eclipse.jface.text.DocumentRewriteSessionEvent;
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67 import org.eclipse.jface.text.IDocumentPartitionerExtension2;
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68 import org.eclipse.jface.text.ITypedRegion;
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69 import org.eclipse.jface.text.TreeLineTracker;
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72
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73 import java.lang.all;
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74 import java.util.List;
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75 import java.util.ArrayList;
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76 import java.util.Iterator;
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77 import java.util.Set;
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78
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79
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80
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81 /**
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82 * Combines the information of the occurrence of a line delimiter. <code>delimiterIndex</code>
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83 * is the index where a line delimiter starts, whereas <code>delimiterLength</code>,
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84 * indicates the length of the delimiter.
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85 */
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86 protected class DelimiterInfo {
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87 public int delimiterIndex;
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88 public int delimiterLength;
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89 public String delimiter;
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90 }
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91 alias DelimiterInfo AbstractLineTracker_DelimiterInfo;
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92
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93 /**
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94 * Abstract implementation of <code>ILineTracker</code>. It lets the definition of line
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95 * delimiters to subclasses. Assuming that '\n' is the only line delimiter, this abstract
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96 * implementation defines the following line scheme:
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97 * <ul>
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98 * <li> "" -> [0,0]
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99 * <li> "a" -> [0,1]
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100 * <li> "\n" -> [0,1], [1,0]
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101 * <li> "a\n" -> [0,2], [2,0]
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102 * <li> "a\nb" -> [0,2], [2,1]
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103 * <li> "a\nbc\n" -> [0,2], [2,3], [5,0]
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104 * </ul>
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105 * <p>
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106 * This class must be subclassed.
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107 * </p>
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108 */
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109 public abstract class AbstractLineTracker : ILineTracker, ILineTrackerExtension {
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110
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111 /**
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112 * Tells whether this class is in debug mode.
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113 *
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114 * @since 3.1
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115 */
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116 private static const bool DEBUG= false;
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117
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118 /**
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119 * Representation of replace and set requests.
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120 *
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121 * @since 3.1
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122 */
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123 protected static class Request {
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124 public const int offset;
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125 public const int length;
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126 public const String text;
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127
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128 public this(int offset, int length, String text) {
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129 this.offset= offset;
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130 this.length= length;
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131 this.text= text;
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132 }
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133
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134 public this(String text) {
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135 this.offset= -1;
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136 this.length= -1;
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137 this.text= text;
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138 }
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139
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140 public bool isReplaceRequest() {
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141 return this.offset > -1 && this.length > -1;
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142 }
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143 }
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144
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145 /**
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146 * The active rewrite session.
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147 *
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148 * @since 3.1
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149 */
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150 private DocumentRewriteSession fActiveRewriteSession;
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151 /**
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152 * The list of pending requests.
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153 *
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154 * @since 3.1
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155 */
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156 private List fPendingRequests;
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157 /**
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158 * The implementation that this tracker delegates to.
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159 *
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160 * @since 3.2
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161 */
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162 private ILineTracker fDelegate;
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163 private void fDelegate_init() {
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164 fDelegate = new class() ListLineTracker {
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165 public String[] getLegalLineDelimiters() {
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166 return this.outer.getLegalLineDelimiters();
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167 }
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168
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169 protected DelimiterInfo nextDelimiterInfo(String text, int offset) {
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170 return this.outer.nextDelimiterInfo(text, offset);
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171 }
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172 };
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173 }
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174 /**
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175 * Whether the delegate needs conversion when the line structure is modified.
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176 */
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177 private bool fNeedsConversion= true;
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178
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179 /**
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180 * Creates a new line tracker.
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181 */
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182 protected this() {
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183 fDelegate_init();
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184 }
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185
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186 /*
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187 * @see org.eclipse.jface.text.ILineTracker#computeNumberOfLines(java.lang.String)
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188 */
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189 public int computeNumberOfLines(String text) {
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190 return fDelegate.computeNumberOfLines(text);
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191 }
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192
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193 /*
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194 * @see org.eclipse.jface.text.ILineTracker#getLineDelimiter(int)
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195 */
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196 public String getLineDelimiter(int line) {
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197 checkRewriteSession();
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198 return fDelegate.getLineDelimiter(line);
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199 }
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200
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201 /*
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202 * @see org.eclipse.jface.text.ILineTracker#getLineInformation(int)
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203 */
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204 public IRegion getLineInformation(int line) {
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205 checkRewriteSession();
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206 return fDelegate.getLineInformation(line);
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207 }
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208
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209 /*
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210 * @see org.eclipse.jface.text.ILineTracker#getLineInformationOfOffset(int)
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211 */
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212 public IRegion getLineInformationOfOffset(int offset) {
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213 checkRewriteSession();
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214 return fDelegate.getLineInformationOfOffset(offset);
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215 }
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216
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217 /*
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218 * @see org.eclipse.jface.text.ILineTracker#getLineLength(int)
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219 */
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220 public int getLineLength(int line) {
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221 checkRewriteSession();
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222 return fDelegate.getLineLength(line);
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223 }
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224
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225 /*
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226 * @see org.eclipse.jface.text.ILineTracker#getLineNumberOfOffset(int)
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227 */
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228 public int getLineNumberOfOffset(int offset) {
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229 checkRewriteSession();
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230 return fDelegate.getLineNumberOfOffset(offset);
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231 }
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232
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233 /*
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234 * @see org.eclipse.jface.text.ILineTracker#getLineOffset(int)
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235 */
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236 public int getLineOffset(int line) {
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237 checkRewriteSession();
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238 return fDelegate.getLineOffset(line);
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239 }
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240
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241 /*
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242 * @see org.eclipse.jface.text.ILineTracker#getNumberOfLines()
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243 */
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244 public int getNumberOfLines() {
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245 try {
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246 checkRewriteSession();
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247 } catch (BadLocationException x) {
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248 // TODO there is currently no way to communicate that exception back to the document
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249 }
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250 return fDelegate.getNumberOfLines();
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251 }
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252
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253 /*
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254 * @see org.eclipse.jface.text.ILineTracker#getNumberOfLines(int, int)
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255 */
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256 public int getNumberOfLines(int offset, int length) {
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257 checkRewriteSession();
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258 return fDelegate.getNumberOfLines(offset, length);
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259 }
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260
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261 /*
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262 * @see org.eclipse.jface.text.ILineTracker#set(java.lang.String)
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263 */
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264 public void set(String text) {
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265 if (hasActiveRewriteSession()) {
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266 fPendingRequests.clear();
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267 fPendingRequests.add(new Request(text));
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268 return;
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269 }
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270
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271 fDelegate.set(text);
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272 }
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273
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274 /*
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275 * @see org.eclipse.jface.text.ILineTracker#replace(int, int, java.lang.String)
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276 */
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277 public void replace(int offset, int length, String text) {
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278 if (hasActiveRewriteSession()) {
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279 fPendingRequests.add(new Request(offset, length, text));
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280 return;
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281 }
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282
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283 checkImplementation();
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284
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285 fDelegate.replace(offset, length, text);
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286 }
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287
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288 /**
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289 * Converts the implementation to be a {@link TreeLineTracker} if it isn't yet.
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290 *
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291 * @since 3.2
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292 */
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293 private void checkImplementation() {
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294 if (fNeedsConversion) {
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295 fNeedsConversion= false;
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296 fDelegate= new class(cast(ListLineTracker) fDelegate) TreeLineTracker {
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297 this(ListLineTracker arg){
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298 super(arg);
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299 }
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300 protected DelimiterInfo nextDelimiterInfo(String text, int offset) {
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301 return this.outer.nextDelimiterInfo(text, offset);
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302 }
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303
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304 public String[] getLegalLineDelimiters() {
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305 return this.outer.getLegalLineDelimiters();
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306 }
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307 };
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308 }
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309 }
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310
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311 /**
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312 * Returns the information about the first delimiter found in the given text starting at the
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313 * given offset.
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314 *
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315 * @param text the text to be searched
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316 * @param offset the offset in the given text
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317 * @return the information of the first found delimiter or <code>null</code>
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318 */
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319 protected abstract DelimiterInfo nextDelimiterInfo(String text, int offset);
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320
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321 /*
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322 * @see org.eclipse.jface.text.ILineTrackerExtension#startRewriteSession(org.eclipse.jface.text.DocumentRewriteSession)
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323 * @since 3.1
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324 */
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325 public final void startRewriteSession(DocumentRewriteSession session) {
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326 if (fActiveRewriteSession !is null)
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327 throw new IllegalStateException();
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328 fActiveRewriteSession= session;
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329 fPendingRequests= new ArrayList(20);
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330 }
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331
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332 /*
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333 * @see org.eclipse.jface.text.ILineTrackerExtension#stopRewriteSession(org.eclipse.jface.text.DocumentRewriteSession, java.lang.String)
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334 * @since 3.1
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335 */
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336 public final void stopRewriteSession(DocumentRewriteSession session, String text) {
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337 if (fActiveRewriteSession is session) {
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338 fActiveRewriteSession= null;
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339 fPendingRequests= null;
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340 set(text);
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341 }
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342 }
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343
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344 /**
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345 * Tells whether there's an active rewrite session.
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346 *
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347 * @return <code>true</code> if there is an active rewrite session, <code>false</code>
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348 * otherwise
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349 * @since 3.1
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350 */
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351 protected final bool hasActiveRewriteSession() {
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352 return fActiveRewriteSession !is null;
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353 }
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354
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355 /**
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356 * Flushes the active rewrite session.
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357 *
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358 * @throws BadLocationException in case the recorded requests cannot be processed correctly
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359 * @since 3.1
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360 */
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361 protected final void flushRewriteSession() {
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362 if (DEBUG)
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363 System.out_.println(Format("AbstractLineTracker: Flushing rewrite session: {}", fActiveRewriteSession)); //$NON-NLS-1$
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364
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365 Iterator e= fPendingRequests.iterator();
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366
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367 fPendingRequests= null;
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368 fActiveRewriteSession= null;
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369
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370 while (e.hasNext()) {
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371 Request request= cast(Request) e.next();
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372 if (request.isReplaceRequest())
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373 replace(request.offset, request.length, request.text);
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374 else
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375 set(request.text);
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376 }
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377 }
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378
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379 /**
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380 * Checks the presence of a rewrite session and flushes it.
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381 *
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382 * @throws BadLocationException in case flushing does not succeed
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383 * @since 3.1
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384 */
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385 protected final void checkRewriteSession() {
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386 if (hasActiveRewriteSession())
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387 flushRewriteSession();
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388 }
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389 }