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annotate org.eclipse.text/src/org/eclipse/jface/text/projection/FragmentUpdater.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, 2005 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.jface.text.projection.FragmentUpdater;
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14 import org.eclipse.jface.text.projection.ChildDocumentManager;
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15 import org.eclipse.jface.text.projection.IMinimalMapping;
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16 import org.eclipse.jface.text.projection.Segment;
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17 import org.eclipse.jface.text.projection.ChildDocument;
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18 import org.eclipse.jface.text.projection.ProjectionMapping;
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19 import org.eclipse.jface.text.projection.SegmentUpdater;
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20 import org.eclipse.jface.text.projection.ProjectionDocumentEvent;
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21 import org.eclipse.jface.text.projection.ProjectionTextStore;
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22 import org.eclipse.jface.text.projection.ProjectionDocumentManager;
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23 import org.eclipse.jface.text.projection.Fragment;
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24 import org.eclipse.jface.text.projection.ProjectionDocument;
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28 import java.lang.all;
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29 import java.util.Set;
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32 import org.eclipse.jface.text.BadLocationException;
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33 import org.eclipse.jface.text.BadPositionCategoryException;
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34 import org.eclipse.jface.text.DefaultPositionUpdater;
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35 import org.eclipse.jface.text.DocumentEvent;
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36 import org.eclipse.jface.text.IDocument;
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37 import org.eclipse.jface.text.Position;
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39
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40 /**
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41 * The position updater used to adapt the fragments of a master document. If an
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42 * insertion happens at a fragment's offset, the fragment is extended rather
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43 * than shifted. Also, the last fragment is extended if an insert operation
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44 * happens at the end of the fragment.
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45 *
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46 * @since 3.0
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47 */
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48 class FragmentUpdater : DefaultPositionUpdater {
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49
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50 /** Indicates whether the position being updated represents the last fragment. */
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51 private bool fIsLast= false;
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52
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53 /**
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54 * Creates the fragment updater for the given category.
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55 *
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56 * @param fragmentCategory the position category used for managing the fragments of a document
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57 */
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58 /+protected+/ this(String fragmentCategory) {
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59 super(fragmentCategory);
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60 }
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62 /*
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63 * @see org.eclipse.jface.text.IPositionUpdater#update(org.eclipse.jface.text.DocumentEvent)
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64 */
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65 public void update(DocumentEvent event) {
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66
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67 try {
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68
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69 Position[] category= event.getDocument().getPositions(getCategory());
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70
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71 fOffset= event.getOffset();
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72 fLength= event.getLength();
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73 fReplaceLength= (event.getText() is null ? 0 : event.getText().length());
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74 fDocument= event.getDocument();
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75
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76 for (int i= 0; i < category.length; i++) {
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77
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78 fPosition= category[i];
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79 fIsLast= (i is category.length -1);
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80
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81 fOriginalPosition.offset= fPosition.offset;
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82 fOriginalPosition.length= fPosition.length;
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83
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84 if (notDeleted())
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85 adaptToReplace();
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86 }
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87
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88 } catch (BadPositionCategoryException x) {
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89 // do nothing
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90 }
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91 }
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92
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93 /*
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94 * @see org.eclipse.jface.text.DefaultPositionUpdater#adaptToInsert()
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95 */
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96 protected void adaptToInsert() {
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97 int myStart= fPosition.offset;
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98 int myEnd= Math.max(myStart, fPosition.offset + fPosition.length - (fIsLast || isAffectingReplace() ? 0 : 1));
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99
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100 if (myEnd < fOffset)
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101 return;
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102
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103 if (fLength <= 0) {
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104
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105 if (myStart <= fOffset)
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106 fPosition.length += fReplaceLength;
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107 else
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108 fPosition.offset += fReplaceLength;
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109
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110 } else {
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111
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112 if (myStart <= fOffset && fOriginalPosition.offset <= fOffset)
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113 fPosition.length += fReplaceLength;
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114 else
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115 fPosition.offset += fReplaceLength;
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116 }
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117 }
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118
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119 /**
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120 * Returns whether this updater considers any position affected by the given document event. A
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121 * position is affected if <code>event</code> {@link Position#overlapsWith(int, int) overlaps}
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122 * with it but not if the position is only shifted.
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123 *
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124 * @param event the event
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125 * @return <code>true</code> if there is any affected position, <code>false</code> otherwise
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126 */
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127 public bool affectsPositions(DocumentEvent event) {
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128 IDocument document= event.getDocument();
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129 try {
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130
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131 int index= document.computeIndexInCategory(getCategory(), event.getOffset());
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132 Position[] fragments= document.getPositions(getCategory());
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133
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134 if (0 < index) {
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135 Position fragment= fragments[index - 1];
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136 if (fragment.overlapsWith(event.getOffset(), event.getLength()))
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137 return true;
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138 if (index is fragments.length && fragment.offset + fragment.length is event.getOffset())
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139 return true;
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140 }
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141
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142 if (index < fragments.length) {
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143 Position fragment= fragments[index];
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144 return fragment.overlapsWith(event.getOffset(), event.getLength());
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145 }
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146
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147 } catch (BadLocationException x) {
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148 } catch (BadPositionCategoryException x) {
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149 }
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150
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151 return false;
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152 }
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153 }