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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 dwtx.jface.text.projection.ChildDocument;
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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 dwtx.jface.text.BadLocationException;
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18 import dwtx.jface.text.IDocument;
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19 import dwtx.jface.text.IRegion;
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20 import dwtx.jface.text.Position;
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21
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22 /**
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23 * Implementation of a child document based on
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24 * {@link dwtx.jface.text.projection.ProjectionDocument}. This class
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25 * exists for compatibility reasons.
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26 * <p>
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27 * Internal class. This class is not intended to be used by clients.</p>
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28 *
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29 * @since 3.0
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30 * @noinstantiate This class is not intended to be instantiated by clients.
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31 * @noextend This class is not intended to be subclassed by clients.
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32 */
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33 public class ChildDocument : ProjectionDocument {
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34
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35 /**
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36 * Position reflecting a visible region. The exclusive end offset of the position
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37 * is considered being overlapping with the visible region.
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38 */
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39 static private class VisibleRegion : Position {
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40
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41 /**
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42 * Creates a new visible region.
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43 *
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44 * @param regionOffset the offset of the region
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45 * @param regionLength the length of the region
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46 */
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47 public VisibleRegion(int regionOffset, int regionLength) {
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48 super(regionOffset, regionLength);
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49 }
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50
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51 /**
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52 * If <code>regionOffset</code> is the end of the visible region and the <code>regionLength is 0</code>,
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53 * the <code>regionOffset</code> is considered overlapping with the visible region.
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54 *
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55 * @see dwtx.jface.text.Position#overlapsWith(int, int)
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56 */
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57 public bool overlapsWith(int regionOffset, int regionLength) {
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58 bool appending= (regionOffset is offset + length) && regionLength is 0;
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59 return appending || super.overlapsWith(regionOffset, regionLength);
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60 }
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61 }
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62
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63 /**
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64 * Creates a new child document.
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65 *
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66 * @param masterDocument @inheritDoc
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67 */
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68 public ChildDocument(IDocument masterDocument) {
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69 super(masterDocument);
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70 }
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71
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72 /**
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73 * Returns the parent document of this child document.
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74 *
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75 * @return the parent document of this child document
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76 * @see ProjectionDocument#getMasterDocument()
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77 */
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78 public IDocument getParentDocument() {
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79 return getMasterDocument();
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80 }
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81
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82 /**
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83 * Sets the parent document range covered by this child document to the
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84 * given range.
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85 *
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86 * @param offset the offset of the range
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87 * @param length the length of the range
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88 * @throws BadLocationException if the given range is not valid
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89 */
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90 public void setParentDocumentRange(int offset, int length) throws BadLocationException {
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91 replaceMasterDocumentRanges(offset, length);
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92 }
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93
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94 /**
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95 * Returns the parent document range of this child document.
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96 *
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97 * @return the parent document range of this child document
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98 */
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99 public Position getParentDocumentRange() {
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100 IRegion coverage= getDocumentInformationMapping().getCoverage();
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101 return new VisibleRegion(coverage.getOffset(), coverage.getLength());
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102 }
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103 }
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