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annotate org.eclipse.text/src/org/eclipse/text/edits/TextEditVisitor.d @ 14:5feec68b4556

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First run of automatic package imports
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:41:58 +0100
parents bc29606a740c
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.text.edits.TextEditVisitor;
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14 import org.eclipse.text.edits.MalformedTreeException;
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15 import org.eclipse.text.edits.TextEditGroup;
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16 import org.eclipse.text.edits.RangeMarker;
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17 import org.eclipse.text.edits.TextEditCopier;
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18 import org.eclipse.text.edits.UndoEdit;
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19 import org.eclipse.text.edits.InsertEdit;
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20 import org.eclipse.text.edits.MoveSourceEdit;
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21 import org.eclipse.text.edits.MoveTargetEdit;
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22 import org.eclipse.text.edits.CopyTargetEdit;
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23 import org.eclipse.text.edits.TextEditProcessor;
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24 import org.eclipse.text.edits.TextEdit;
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25 import org.eclipse.text.edits.TreeIterationInfo;
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26 import org.eclipse.text.edits.TextEditMessages;
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27 import org.eclipse.text.edits.CopySourceEdit;
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28 import org.eclipse.text.edits.ReplaceEdit;
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29 import org.eclipse.text.edits.MultiTextEdit;
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30 import org.eclipse.text.edits.EditDocument;
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31 import org.eclipse.text.edits.UndoCollector;
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32 import org.eclipse.text.edits.ISourceModifier;
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33 import org.eclipse.text.edits.CopyingRangeMarker;
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34 import org.eclipse.text.edits.DeleteEdit;
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38 import java.lang.all;
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39
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40 /**
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41 * A visitor for text edits.
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42 * <p>
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43 * For each different concrete text edit type <it>T</it> there is a method:
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44 * <ul>
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45 * <li><code>public bool visit(<it>T</it> node)</code> - Visits the given edit to
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46 * perform some arbitrary operation. If <code>true </code> is returned, the given edit's
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47 * child edits will be visited next; however, if <code>false</code> is returned, the
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48 * given edit's child edits will not be visited. The default implementation provided by
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49 * this class calls a generic method <code>visitNode(<it>TextEdit</it> node)</code>.
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50 * Subclasses may reimplement these method as needed.</li>
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51 * </ul>
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52 * </p>
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53 * <p>
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54 * In addition, there are methods for visiting text edits in the
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55 * abstract, regardless of node type:
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56 * <ul>
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57 * <li><code>public void preVisit(TextEdit edit)</code> - Visits
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58 * the given edit to perform some arbitrary operation.
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59 * This method is invoked prior to the appropriate type-specific
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60 * <code>visit</code> method.
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61 * The default implementation of this method does nothing.
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62 * Subclasses may reimplement this method as needed.</li>
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63 *
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64 * <li><code>public void postVisit(TextEdit edit)</code> - Visits
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65 * the given edit to perform some arbitrary operation.
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66 * This method is invoked after the appropriate type-specific
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67 * <code>endVisit</code> method.
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68 * The default implementation of this method does nothing.
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69 * Subclasses may reimplement this method as needed.</li>
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70 * </ul>
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71 * </p>
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72 * <p>
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73 * For edits with children, the child nodes are visited in increasing order.
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74 * </p>
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75 *
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76 * @see TextEdit#accept(TextEditVisitor)
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77 * @since 3.0
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78 */
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79 public class TextEditVisitor {
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80
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81 /**
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82 * Visits the given text edit prior to the type-specific visit.
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83 * (before <code>visit</code>).
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84 * <p>
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85 * The default implementation does nothing. Subclasses may reimplement.
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86 * </p>
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87 *
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88 * @param edit the node to visit
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89 */
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90 public void preVisit(TextEdit edit) {
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91 // default implementation: do nothing
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92 }
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93
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94 /**
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95 * Visits the given text edit following the type-specific visit
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96 * (after <code>endVisit</code>).
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97 * <p>
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98 * The default implementation does nothing. Subclasses may reimplement.
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99 * </p>
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100 *
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101 * @param edit the node to visit
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102 */
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103 public void postVisit(TextEdit edit) {
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104 // default implementation: do nothing
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105 }
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106
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107 /**
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108 * Visits the given text edit. This method is called by default from
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109 * type-specific visits. It is not called by an edit's accept method.
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110 * The default implementation returns <code>true</code>.
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111 *
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112 * @param edit the node to visit
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113 * @return If <code>true</code> is returned, the given node's child
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114 * nodes will be visited next; however, if <code>false</code> is
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115 * returned, the given node's child nodes will not be visited.
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116 */
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117 public bool visitNode(TextEdit edit) {
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118 return true;
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119 }
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120
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121 /**
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122 * Visits a <code>CopySourceEdit</code> instance.
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123 *
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124 * @param edit the node to visit
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125 * @return If <code>true</code> is returned, the given node's child
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126 * nodes will be visited next; however, if <code>false</code> is
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127 * returned, the given node's child nodes will not be visited.
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128 */
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129 public bool visit(CopySourceEdit edit) {
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130 return visitNode(edit);
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131 }
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132
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133 /**
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134 * Visits a <code>CopyTargetEdit</code> instance.
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135 *
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136 * @param edit the node to visit
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137 * @return If <code>true</code> is returned, the given node's child
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138 * nodes will be visited next; however, if <code>false</code> is
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139 * returned, the given node's child nodes will not be visited.
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140 */
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141 public bool visit(CopyTargetEdit edit) {
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142 return visitNode(edit);
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143 }
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144
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145 /**
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146 * Visits a <code>MoveSourceEdit</code> instance.
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147 *
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148 * @param edit the node to visit
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149 * @return If <code>true</code> is returned, the given node's child
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150 * nodes will be visited next; however, if <code>false</code> is
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151 * returned, the given node's child nodes will not be visited.
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152 */
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153 public bool visit(MoveSourceEdit edit) {
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154 return visitNode(edit);
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155 }
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156
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157 /**
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158 * Visits a <code>MoveTargetEdit</code> instance.
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159 *
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160 * @param edit the node to visit
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161 * @return If <code>true</code> is returned, the given node's child
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162 * nodes will be visited next; however, if <code>false</code> is
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163 * returned, the given node's child nodes will not be visited.
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164 */
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165 public bool visit(MoveTargetEdit edit) {
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166 return visitNode(edit);
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167 }
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168
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169 /**
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170 * Visits a <code>RangeMarker</code> instance.
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171 *
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172 * @param edit the node to visit
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173 * @return If <code>true</code> is returned, the given node's child
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174 * nodes will be visited next; however, if <code>false</code> is
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175 * returned, the given node's child nodes will not be visited.
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176 */
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177 public bool visit(RangeMarker edit) {
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178 return visitNode(edit);
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179 }
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180
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181 /**
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182 * Visits a <code>CopyingRangeMarker</code> instance.
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183 *
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184 * @param edit the node to visit
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185 * @return If <code>true</code> is returned, the given node's child
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186 * nodes will be visited next; however, if <code>false</code> is
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187 * returned, the given node's child nodes will not be visited.
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188 */
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189 public bool visit(CopyingRangeMarker edit) {
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190 return visitNode(edit);
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191 }
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192
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193 /**
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194 * Visits a <code>DeleteEdit</code> instance.
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195 *
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196 * @param edit the node to visit
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197 * @return If <code>true</code> is returned, the given node's child
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198 * nodes will be visited next; however, if <code>false</code> is
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199 * returned, the given node's child nodes will not be visited.
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200 */
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201 public bool visit(DeleteEdit edit) {
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202 return visitNode(edit);
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203 }
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204
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205 /**
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206 * Visits a <code>InsertEdit</code> instance.
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207 *
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208 * @param edit the node to visit
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209 * @return If <code>true</code> is returned, the given node's child
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210 * nodes will be visited next; however, if <code>false</code> is
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211 * returned, the given node's child nodes will not be visited.
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212 */
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213 public bool visit(InsertEdit edit) {
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214 return visitNode(edit);
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215 }
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216
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217 /**
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218 * Visits a <code>ReplaceEdit</code> instance.
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219 *
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220 * @param edit the node to visit
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221 * @return If <code>true</code> is returned, the given node's child
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222 * nodes will be visited next; however, if <code>false</code> is
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223 * returned, the given node's child nodes will not be visited.
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224 */
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225 public bool visit(ReplaceEdit edit) {
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226 return visitNode(edit);
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227 }
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228
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229 /**
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230 * Visits a <code>UndoEdit</code> instance.
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231 *
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232 * @param edit the node to visit
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233 * @return If <code>true</code> is returned, the given node's child
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234 * nodes will be visited next; however, if <code>false</code> is
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235 * returned, the given node's child nodes will not be visited.
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236 */
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237 public bool visit(UndoEdit edit) {
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238 return visitNode(edit);
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239 }
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240
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241 /**
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242 * Visits a <code>MultiTextEdit</code> instance.
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243 *
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244 * @param edit the node to visit
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245 * @return If <code>true</code> is returned, the given node's child
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246 * nodes will be visited next; however, if <code>false</code> is
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247 * returned, the given node's child nodes will not be visited.
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248 */
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249 public bool visit(MultiTextEdit edit) {
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250 return visitNode(edit);
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251 }
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252 }