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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 dwtx.text.edits.TextEditCopier;
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14
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131
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15 import dwtx.text.edits.MultiTextEdit; // packageimport
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16 import dwtx.text.edits.CopySourceEdit; // packageimport
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17 import dwtx.text.edits.MoveSourceEdit; // packageimport
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18 import dwtx.text.edits.CopyingRangeMarker; // packageimport
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19 import dwtx.text.edits.ReplaceEdit; // packageimport
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20 import dwtx.text.edits.EditDocument; // packageimport
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21 import dwtx.text.edits.UndoCollector; // packageimport
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22 import dwtx.text.edits.DeleteEdit; // packageimport
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23 import dwtx.text.edits.MoveTargetEdit; // packageimport
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24 import dwtx.text.edits.CopyTargetEdit; // packageimport
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25 import dwtx.text.edits.ISourceModifier; // packageimport
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26 import dwtx.text.edits.TextEditMessages; // packageimport
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27 import dwtx.text.edits.TextEditProcessor; // packageimport
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28 import dwtx.text.edits.MalformedTreeException; // packageimport
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29 import dwtx.text.edits.TreeIterationInfo; // packageimport
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30 import dwtx.text.edits.TextEditVisitor; // packageimport
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31 import dwtx.text.edits.TextEditGroup; // packageimport
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32 import dwtx.text.edits.TextEdit; // packageimport
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33 import dwtx.text.edits.RangeMarker; // packageimport
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34 import dwtx.text.edits.UndoEdit; // packageimport
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35 import dwtx.text.edits.InsertEdit; // packageimport
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36
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37
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129
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38 import dwt.dwthelper.utils;
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39
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40 import java.util.ArrayList;
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41 import java.util.HashMap;
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42 import java.util.Iterator;
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43 import java.util.List;
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44 import java.util.Map;
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45
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46 import dwtx.core.runtime.Assert;
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47
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48
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49 /**
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50 * Copies a tree of text edits. A text edit copier keeps a map
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51 * between original and new text edits. It can be used to map
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52 * a copy back to its original edit.
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53 *
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54 * @since 3.0
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55 */
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56 public final class TextEditCopier {
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57
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58 private TextEdit fEdit;
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59 private Map fCopies;
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60
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61 /**
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62 * Constructs a new <code>TextEditCopier</code> for the
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63 * given edit. The actual copy is done by calling <code>
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64 * perform</code>.
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65 *
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66 * @param edit the edit to copy
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67 *
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68 * @see #perform()
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69 */
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130
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70 public this(TextEdit edit) {
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129
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71 super();
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72 Assert.isNotNull(edit);
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73 fEdit= edit;
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74 fCopies= new HashMap();
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75 }
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76
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77 /**
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78 * Performs the actual copying.
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79 *
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80 * @return the copy
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81 */
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82 public TextEdit perform() {
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83 TextEdit result= doCopy(fEdit);
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84 if (result !is null) {
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85 for (Iterator iter= fCopies.keySet().iterator(); iter.hasNext();) {
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86 TextEdit edit= cast(TextEdit)iter.next();
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87 edit.postProcessCopy(this);
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88 }
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89 }
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90 return result;
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91 }
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92
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93 /**
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94 * Returns the copy for the original text edit.
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95 *
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96 * @param original the original for which the copy
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97 * is requested
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98 * @return the copy of the original edit or <code>null</code>
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99 * if the original isn't managed by this copier
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100 */
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101 public TextEdit getCopy(TextEdit original) {
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102 Assert.isNotNull(original);
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103 return cast(TextEdit)fCopies.get(original);
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129
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104 }
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105
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106 //---- helper methods --------------------------------------------
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107
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108 private TextEdit doCopy(TextEdit edit) {
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109 TextEdit result= edit.doCopy();
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110 List children= edit.internalGetChildren();
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111 if (children !is null) {
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112 List newChildren= new ArrayList(children.size());
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113 for (Iterator iter= children.iterator(); iter.hasNext();) {
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114 TextEdit childCopy= doCopy(cast(TextEdit)iter.next());
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115 childCopy.internalSetParent(result);
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116 newChildren.add(childCopy);
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117 }
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118 result.internalSetChildren(newChildren);
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119 }
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120 addCopy(edit, result);
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121 return result;
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122 }
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123
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124 private void addCopy(TextEdit original, TextEdit copy) {
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125 fCopies.put(original, copy);
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126 }
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127 }
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