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annotate org.eclipse.text/src/org/eclipse/text/edits/TextEditProcessor.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, 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 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.TextEditVisitor;
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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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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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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 }