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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.CopyTargetEdit;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import java.util.List;
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18
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19 import dwtx.core.runtime.Assert;
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20 import dwtx.jface.text.BadLocationException;
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21 import dwtx.jface.text.IDocument;
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22
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23 /**
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24 * A copy target edit denotes the target of a copy operation. Copy
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25 * target edits are only valid inside an edit tree if they have a
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26 * corresponding source edit. Furthermore a target edit can't
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27 * can't be a direct or indirect child of the associated source edit.
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28 * Violating one of two requirements will result in a <code>
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29 * MalformedTreeException</code> when executing the edit tree.
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30 * <p>
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31 * Copy target edits can't be used as a parent for other edits.
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32 * Trying to add an edit to a copy target edit results in a <code>
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33 * MalformedTreeException</code> as well.
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34 *
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35 * @see dwtx.text.edits.CopySourceEdit
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36 *
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37 * @since 3.0
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38 */
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39 public final class CopyTargetEdit : TextEdit {
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40
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41 private CopySourceEdit fSource;
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42
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43 /**
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44 * Constructs a new copy target edit
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45 *
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46 * @param offset the edit's offset
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47 */
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48 public CopyTargetEdit(int offset) {
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49 super(offset, 0);
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50 }
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51
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52 /**
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53 * Constructs an new copy target edit
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54 *
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55 * @param offset the edit's offset
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56 * @param source the corresponding source edit
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57 */
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130
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58 public this(int offset, CopySourceEdit source) {
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129
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59 this(offset);
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60 setSourceEdit(source);
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61 }
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62
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63 /*
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64 * Copy constructor
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65 */
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130
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66 private this(CopyTargetEdit other) {
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129
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67 super(other);
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68 }
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69
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70 /**
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71 * Returns the associated source edit or <code>null</code>
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72 * if no source edit is associated yet.
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73 *
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74 * @return the source edit or <code>null</code>
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75 */
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76 public CopySourceEdit getSourceEdit() {
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77 return fSource;
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78 }
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79
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80 /**
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81 * Sets the source edit.
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82 *
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83 * @param edit the source edit
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84 *
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85 * @exception MalformedTreeException is thrown if the target edit
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86 * is a direct or indirect child of the source edit
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87 */
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88 public void setSourceEdit(CopySourceEdit edit) throws MalformedTreeException {
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89 Assert.isNotNull(edit);
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90 if (fSource !is edit) {
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91 fSource= edit;
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92 fSource.setTargetEdit(this);
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93 TextEdit parent= getParent();
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94 while (parent !is null) {
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95 if (parent is fSource)
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96 throw new MalformedTreeException(parent, this, TextEditMessages.getString("CopyTargetEdit.wrong_parent")); //$NON-NLS-1$
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97 parent= parent.getParent();
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98 }
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99 }
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100 }
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101
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102 /*
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103 * @see TextEdit#doCopy
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104 */
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105 protected TextEdit doCopy() {
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106 return new CopyTargetEdit(this);
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107 }
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108
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109 /*
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110 * @see TextEdit#postProcessCopy
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111 */
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112 protected void postProcessCopy(TextEditCopier copier) {
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113 if (fSource !is null) {
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114 CopyTargetEdit target= (CopyTargetEdit)copier.getCopy(this);
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115 CopySourceEdit source= (CopySourceEdit)copier.getCopy(fSource);
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116 if (target !is null && source !is null)
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117 target.setSourceEdit(source);
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118 }
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119 }
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120
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121 /*
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122 * @see TextEdit#accept0
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123 */
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124 protected void accept0(TextEditVisitor visitor) {
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125 bool visitChildren= visitor.visit(this);
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126 if (visitChildren) {
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127 acceptChildren(visitor);
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128 }
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129 }
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130
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131 /*
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132 * @see TextEdit#traverseConsistencyCheck
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133 */
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134 int traverseConsistencyCheck(TextEditProcessor processor, IDocument document, List sourceEdits) {
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135 return super.traverseConsistencyCheck(processor, document, sourceEdits) + 1;
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136 }
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137
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138 /*
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139 * @see TextEdit#performConsistencyCheck
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140 */
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141 void performConsistencyCheck(TextEditProcessor processor, IDocument document) throws MalformedTreeException {
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142 if (fSource is null)
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143 throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("CopyTargetEdit.no_source")); //$NON-NLS-1$
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144 if (fSource.getTargetEdit() !is this)
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145 throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("CopyTargetEdit.different_target")); //$NON-NLS-1$
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146 }
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147
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148 /*
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149 * @see TextEdit#performDocumentUpdating
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150 */
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151 int performDocumentUpdating(IDocument document) throws BadLocationException {
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152 String source= fSource.getContent();
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153 document.replace(getOffset(), getLength(), source);
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154 fDelta= source.length() - getLength();
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155 fSource.clearContent();
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156 return fDelta;
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157 }
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158
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159 /*
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160 * @see TextEdit#deleteChildren
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161 */
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162 bool deleteChildren() {
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163 return false;
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164 }
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165 }
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