Mercurial > projects > dwt2
annotate org.eclipse.text/src/org/eclipse/text/edits/TextEditProcessor.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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children | 5feec68b4556 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 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 org.eclipse.text.edits.TextEditProcessor; |
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14 |
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15 import org.eclipse.text.edits.MultiTextEdit; // packageimport |
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16 import org.eclipse.text.edits.CopySourceEdit; // packageimport |
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17 import org.eclipse.text.edits.MoveSourceEdit; // packageimport |
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18 import org.eclipse.text.edits.CopyingRangeMarker; // packageimport |
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19 import org.eclipse.text.edits.ReplaceEdit; // packageimport |
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20 import org.eclipse.text.edits.EditDocument; // packageimport |
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21 import org.eclipse.text.edits.UndoCollector; // packageimport |
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22 import org.eclipse.text.edits.DeleteEdit; // packageimport |
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23 import org.eclipse.text.edits.MoveTargetEdit; // packageimport |
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24 import org.eclipse.text.edits.CopyTargetEdit; // packageimport |
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25 import org.eclipse.text.edits.TextEditCopier; // packageimport |
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26 import org.eclipse.text.edits.ISourceModifier; // packageimport |
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27 import org.eclipse.text.edits.TextEditMessages; // packageimport |
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28 import org.eclipse.text.edits.MalformedTreeException; // packageimport |
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29 import org.eclipse.text.edits.TreeIterationInfo; // packageimport |
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30 import org.eclipse.text.edits.TextEditVisitor; // packageimport |
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31 import org.eclipse.text.edits.TextEditGroup; // packageimport |
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32 import org.eclipse.text.edits.TextEdit; // packageimport |
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33 import org.eclipse.text.edits.RangeMarker; // packageimport |
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34 import org.eclipse.text.edits.UndoEdit; // packageimport |
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35 import org.eclipse.text.edits.InsertEdit; // packageimport |
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36 |
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37 |
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38 import java.lang.all; |
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39 import java.util.List; |
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40 import java.util.ArrayList; |
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41 import java.util.Iterator; |
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42 import java.util.Set; |
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43 |
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44 |
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45 |
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46 |
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47 import org.eclipse.core.runtime.Assert; |
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48 import org.eclipse.jface.text.BadLocationException; |
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49 import org.eclipse.jface.text.IDocument; |
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50 |
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51 |
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52 /** |
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53 * A <code>TextEditProcessor</code> manages a set of edits and applies |
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54 * them as a whole to an <code>IDocument</code>. |
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55 * <p> |
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56 * This class isn't intended to be subclassed.</p> |
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57 * |
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58 * @see org.eclipse.text.edits.TextEdit#apply(IDocument) |
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59 * |
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60 * @since 3.0 |
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61 * @noextend This class is not intended to be subclassed by clients. |
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62 */ |
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63 public class TextEditProcessor { |
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64 |
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65 private IDocument fDocument; |
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66 private TextEdit fRoot; |
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67 private int fStyle; |
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68 |
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69 private bool fChecked; |
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70 private MalformedTreeException fException; |
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71 |
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72 private List fSourceEdits; |
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73 |
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74 /** |
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75 * Constructs a new edit processor for the given |
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76 * document. |
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77 * |
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78 * @param document the document to manipulate |
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79 * @param root the root of the text edit tree describing |
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80 * the modifications. By passing a text edit a a text edit |
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81 * processor the ownership of the edit is transfered to the |
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82 * text edit processors. Clients must not modify the edit |
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83 * (e.g adding new children) any longer. |
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84 * |
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85 * @param style {@link TextEdit#NONE}, {@link TextEdit#CREATE_UNDO} or {@link TextEdit#UPDATE_REGIONS}) |
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86 */ |
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87 public this(IDocument document, TextEdit root, int style) { |
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88 this(document, root, style, false); |
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89 } |
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90 |
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91 private this(IDocument document, TextEdit root, int style, bool secondary) { |
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92 Assert.isNotNull(cast(Object)document); |
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93 Assert.isNotNull(root); |
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94 fDocument= document; |
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95 fRoot= root; |
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96 if ( auto mte = cast(MultiTextEdit)fRoot ) |
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97 mte.defineRegion(0); |
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98 fStyle= style; |
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99 if (secondary) { |
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100 fChecked= true; |
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101 fSourceEdits= new ArrayList(); |
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102 } |
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103 } |
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104 |
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105 /** |
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106 * Creates a special internal processor used to during source computation inside |
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107 * move source and copy source edits |
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108 * |
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109 * @param document the document to be manipulated |
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110 * @param root the edit tree |
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111 * @param style {@link TextEdit#NONE}, {@link TextEdit#CREATE_UNDO} or {@link TextEdit#UPDATE_REGIONS}) |
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112 * @return a secondary text edit processor |
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113 * @since 3.1 |
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114 */ |
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115 static TextEditProcessor createSourceComputationProcessor(IDocument document, TextEdit root, int style) { |
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116 return new TextEditProcessor(document, root, style, true); |
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117 } |
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118 |
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119 /** |
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120 * Returns the document to be manipulated. |
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121 * |
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122 * @return the document |
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123 */ |
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124 public IDocument getDocument() { |
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125 return fDocument; |
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126 } |
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127 |
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128 /** |
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129 * Returns the edit processor's root edit. |
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130 * |
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131 * @return the processor's root edit |
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132 */ |
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133 public TextEdit getRoot() { |
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134 return fRoot; |
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135 } |
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136 |
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137 /** |
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138 * Returns the style bits of the text edit processor |
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139 * |
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140 * @return the style bits |
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141 * @see TextEdit#CREATE_UNDO |
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142 * @see TextEdit#UPDATE_REGIONS |
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143 */ |
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144 public int getStyle() { |
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145 return fStyle; |
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146 } |
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147 |
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148 /** |
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149 * Checks if the processor can execute all its edits. |
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150 * |
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151 * @return <code>true</code> if the edits can be executed. Return <code>false |
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152 * </code>otherwise. One major reason why edits cannot be executed are wrong |
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153 * offset or length values of edits. Calling perform in this case will very |
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154 * likely end in a <code>BadLocationException</code>. |
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155 */ |
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156 public bool canPerformEdits() { |
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157 try { |
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158 fRoot.dispatchCheckIntegrity(this); |
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159 fChecked= true; |
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160 } catch (MalformedTreeException e) { |
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161 fException= e; |
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162 return false; |
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163 } |
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164 return true; |
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165 } |
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166 |
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167 /** |
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168 * Executes the text edits. |
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169 * |
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170 * @return an object representing the undo of the executed edits |
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171 * @exception MalformedTreeException is thrown if the edit tree isn't |
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172 * in a valid state. This exception is thrown before any edit is executed. |
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173 * So the document is still in its original state. |
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174 * @exception BadLocationException is thrown if one of the edits in the |
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175 * tree can't be executed. The state of the document is undefined if this |
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176 * exception is thrown. |
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177 */ |
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178 public UndoEdit performEdits() { |
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179 if (!fChecked) { |
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180 fRoot.dispatchCheckIntegrity(this); |
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181 } else { |
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182 if (fException !is null) |
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183 throw fException; |
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184 } |
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185 return fRoot.dispatchPerformEdits(this); |
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186 } |
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187 |
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188 /* |
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189 * Class isn't intended to be sub-lcassed |
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190 */ |
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191 protected bool considerEdit(TextEdit edit) { |
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192 return true; |
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193 } |
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194 package bool considerEdit_package(TextEdit edit) { |
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195 return considerEdit(edit); |
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196 } |
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197 |
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198 |
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199 //---- checking -------------------------------------------------------------------- |
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200 |
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201 void checkIntegrityDo() { |
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202 fSourceEdits= new ArrayList(); |
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203 fRoot.traverseConsistencyCheck(this, fDocument, fSourceEdits); |
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204 if (fRoot.getExclusiveEnd() > fDocument.getLength()) |
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205 throw new MalformedTreeException(null, fRoot, TextEditMessages.getString("TextEditProcessor.invalid_length")); //$NON-NLS-1$ |
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206 } |
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207 |
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208 void checkIntegrityUndo() { |
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209 if (fRoot.getExclusiveEnd() > fDocument.getLength()) |
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210 throw new MalformedTreeException(null, fRoot, TextEditMessages.getString("TextEditProcessor.invalid_length")); //$NON-NLS-1$ |
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211 } |
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212 |
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213 //---- execution -------------------------------------------------------------------- |
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214 |
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215 UndoEdit executeDo() { |
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216 UndoCollector collector= new UndoCollector(fRoot); |
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217 try { |
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218 if (createUndo()) |
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219 collector.connect(fDocument); |
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220 computeSources(); |
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221 fRoot.traverseDocumentUpdating(this, fDocument); |
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222 if (updateRegions()) { |
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223 fRoot.traverseRegionUpdating(this, fDocument, 0, false); |
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224 } |
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225 } finally { |
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226 collector.disconnect(fDocument); |
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227 } |
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228 return collector.undo_package; |
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229 } |
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230 |
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231 private void computeSources() { |
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232 for (Iterator iter= fSourceEdits.iterator(); iter.hasNext();) { |
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233 List list= cast(List)iter.next(); |
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234 if (list !is null) { |
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235 for (Iterator edits= list.iterator(); edits.hasNext();) { |
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236 TextEdit edit= cast(TextEdit)edits.next(); |
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237 edit.traverseSourceComputation(this, fDocument); |
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238 } |
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239 } |
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240 } |
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241 } |
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242 |
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243 UndoEdit executeUndo() { |
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244 UndoCollector collector= new UndoCollector(fRoot); |
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245 try { |
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246 if (createUndo()) |
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247 collector.connect(fDocument); |
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248 TextEdit[] edits= fRoot.getChildren(); |
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249 for (int i= edits.length - 1; i >= 0; i--) { |
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250 edits[i].performDocumentUpdating(fDocument); |
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251 } |
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252 } finally { |
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253 collector.disconnect(fDocument); |
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254 } |
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255 return collector.undo_package; |
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256 } |
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257 |
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258 private bool createUndo() { |
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259 return (fStyle & TextEdit.CREATE_UNDO) !is 0; |
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260 } |
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261 |
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262 private bool updateRegions() { |
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263 return (fStyle & TextEdit.UPDATE_REGIONS) !is 0; |
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264 } |
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265 } |