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annotate dwtx/core/commands/operations/AbstractOperation.d @ 104:04b47443bb01

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Reworked the collection uses to make use of a wrapper collection that is compatible to the Java Collections. These new wrappers now use the tango.util.containers instead of the tango.util.collections.
author Frank Benoit <benoit@tionex.de>
date Thu, 07 Aug 2008 15:01:33 +0200
parents 46a6e0e6ccd4
children
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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.core.commands.operations.AbstractOperation;
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15 import dwtx.core.commands.ExecutionException;
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16 import dwtx.core.runtime.Assert;
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17 import dwtx.core.runtime.IAdaptable;
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18 import dwtx.core.runtime.IProgressMonitor;
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19 import dwtx.core.runtime.IStatus;
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21 import dwtx.core.commands.operations.IUndoableOperation;
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22 import dwtx.core.commands.operations.IUndoContext;
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24 import dwt.dwthelper.utils;
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25 import dwtx.dwtxhelper.Collection;
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26 static import tango.text.Text;
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27 alias tango.text.Text.Text!(char) StringBuffer;
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29 /**
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30 * <p>
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31 * Abstract implementation for an undoable operation. At a minimum, subclasses
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32 * should implement behavior for
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33 * {@link IUndoableOperation#execute(dwtx.core.runtime.IProgressMonitor, dwtx.core.runtime.IAdaptable)},
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34 * {@link IUndoableOperation#redo(dwtx.core.runtime.IProgressMonitor, dwtx.core.runtime.IAdaptable)},
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35 * and
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36 * {@link IUndoableOperation#undo(dwtx.core.runtime.IProgressMonitor, dwtx.core.runtime.IAdaptable)}.
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37 * </p>
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38 *
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39 * @see dwtx.core.commands.operations.IUndoableOperation
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40 *
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41 * @since 3.1
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42 */
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43 public abstract class AbstractOperation : IUndoableOperation {
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44 List contexts;
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46 private String label = ""; //$NON-NLS-1$
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47
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48 /**
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49 * Construct an operation that has the specified label.
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50 *
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51 * @param label
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52 * the label to be used for the operation. Should never be
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53 * <code>null</code>.
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54 */
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55 public this(String label) {
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56 Assert.isNotNull(label);
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57 this.label = label;
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58 contexts = new ArrayList();
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59 }
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60
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61 /*
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62 * (non-Javadoc)
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63 *
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64 * @see dwtx.core.commands.operations.IUndoableOperation#addContext(dwtx.core.commands.operations.IUndoContext)
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65 *
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66 * <p> Subclasses may override this method. </p>
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67 */
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68 public void addContext(IUndoContext context) {
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69 if (!contexts.contains(cast(Object)context)) {
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70 contexts.add(cast(Object)context);
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71 }
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72 }
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74 /*
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75 * (non-Javadoc)
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76 *
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77 * @see dwtx.core.commands.operations.IUndoableOperation#canExecute()
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78 * <p> Default implementation. Subclasses may override this method.
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79 * </p>
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80 *
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81 */
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82 public bool canExecute() {
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83 return true;
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84 }
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85
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86 /*
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87 * (non-Javadoc)
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88 *
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89 * @see dwtx.core.commands.operations.IUndoableOperation#canRedo()
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90 * <p> Default implementation. Subclasses may override this method.
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91 * </p>
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92 */
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93 public bool canRedo() {
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94 return true;
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95 }
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96
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97 /*
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98 * (non-Javadoc)
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99 *
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100 * @see dwtx.core.commands.operations.IUndoableOperation#canUndo()
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101 * <p> Default implementation. Subclasses may override this method.
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102 * </p>
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103 */
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104 public bool canUndo() {
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105 return true;
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106 }
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107
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108 /*
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109 * (non-Javadoc)
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110 *
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111 * @see dwtx.core.commands.operations.IUndoableOperation#dispose()
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112 * <p> Default implementation. Subclasses may override this method.
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113 * </p>
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114 */
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115 public void dispose() {
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116 // nothing to dispose.
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117 }
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118
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119 /*
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120 * (non-Javadoc)
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121 *
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122 * @see dwtx.core.commands.operations.IUndoableOperation#execute(dwtx.core.runtime.IProgressMonitor,
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123 * dwtx.core.runtime.IAdaptable)
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124 */
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125 public abstract IStatus execute(IProgressMonitor monitor, IAdaptable info);
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126
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127 public final IUndoContext[] getContexts() {
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128 return arraycast!(IUndoContext)(contexts.toArray());
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129 }
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130
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131 /*
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132 * (non-Javadoc)
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133 *
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134 * @see dwtx.core.commands.operations.IUndoableOperation#getLabel()
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135 * <p> Default implementation. Subclasses may override this method.
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136 * </p>
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137 */
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138 public String getLabel() {
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139 return label;
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140 }
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141
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142 /**
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143 * Set the label of the operation to the specified name.
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144 *
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145 * @param name
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146 * the string to be used for the label. Should never be
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147 * <code>null</code>.
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148 */
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149 public void setLabel(String name) {
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150 label = name;
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151 }
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152
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153 /*
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154 * (non-Javadoc)
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155 *
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156 * @see dwtx.core.commands.operations.IUndoableOperation#hasContext(dwtx.core.commands.operations.IUndoContext)
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157 */
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158 public final bool hasContext(IUndoContext context) {
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159 Assert.isNotNull(cast(Object)context);
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160 for (int i = 0; i < contexts.size(); i++) {
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161 IUndoContext otherContext = cast(IUndoContext)contexts.get(i);
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162 // have to check both ways because one context may be more general
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163 // in
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164 // its matching rules than another.
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165 if (context.matches(otherContext) || otherContext.matches(context)) {
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166 return true;
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167 }
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168 }
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169 return false;
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170 }
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171
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172 /*
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173 * (non-Javadoc)
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174 *
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175 * @see dwtx.core.commands.operations.IUndoableOperation#redo(dwtx.core.runtime.IProgressMonitor,
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176 * dwtx.core.runtime.IAdaptable)
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177 */
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178 public abstract IStatus redo(IProgressMonitor monitor, IAdaptable info);
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179
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180 /*
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181 * (non-Javadoc)
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182 *
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183 * @see dwtx.core.commands.operations.IUndoableOperation#removeContext(dwtx.core.commands.operations.IUndoContext)
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184 * <p> Default implementation. Subclasses may override this method.
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185 * </p>
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186 */
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187
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188 public void removeContext(IUndoContext context) {
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189 contexts.remove(cast(Object)context);
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190 }
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191
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192 /*
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193 * (non-Javadoc)
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194 *
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195 * @see dwtx.core.commands.operations.IUndoableOperation#undo(dwtx.core.runtime.IProgressMonitor,
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196 * dwtx.core.runtime.IAdaptable)
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197 */
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198 public abstract IStatus undo(IProgressMonitor monitor, IAdaptable info);
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199
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200 /**
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201 * The string representation of this operation. Used for debugging purposes
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202 * only. This string should not be shown to an end user.
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203 *
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204 * @return The string representation.
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205 */
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206 public override String toString() {
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207 StringBuffer stringBuffer = new StringBuffer();
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208 stringBuffer.append(getLabel());
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209 stringBuffer.append("("); //$NON-NLS-1$
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210 IUndoContext[] contexts = getContexts();
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211 for (int i = 0; i < contexts.length; i++) {
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212 stringBuffer.append((cast(Object)contexts[i]).toString());
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213 if (i !is contexts.length - 1) {
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214 stringBuffer.append(',');
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215 }
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216 }
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217 stringBuffer.append(')');
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218 return stringBuffer.toString();
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219 }
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220 }