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view dwtx/jface/text/reconciler/DirtyRegion.d @ 131:c4fb132a086c
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 24 Aug 2008 01:13:23 +0200 |
parents | eb30df5ca28b |
children | 7d818bd32d63 |
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/******************************************************************************* * Copyright (c) 2000, 2005 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.jface.text.reconciler.DirtyRegion; import dwtx.jface.text.reconciler.IReconciler; // packageimport import dwtx.jface.text.reconciler.DirtyRegionQueue; // packageimport import dwtx.jface.text.reconciler.IReconcilingStrategy; // packageimport import dwtx.jface.text.reconciler.AbstractReconcileStep; // packageimport import dwtx.jface.text.reconciler.IReconcilingStrategyExtension; // packageimport import dwtx.jface.text.reconciler.MonoReconciler; // packageimport import dwtx.jface.text.reconciler.IReconcileStep; // packageimport import dwtx.jface.text.reconciler.AbstractReconciler; // packageimport import dwtx.jface.text.reconciler.Reconciler; // packageimport import dwtx.jface.text.reconciler.IReconcilableModel; // packageimport import dwtx.jface.text.reconciler.IReconcileResult; // packageimport import dwtx.jface.text.reconciler.IReconcilerExtension; // packageimport import dwt.dwthelper.utils; import dwtx.jface.text.ITypedRegion; /** * A dirty region describes a document range which has been changed. */ public class DirtyRegion : ITypedRegion { /** * Identifies an insert operation. */ final static public String INSERT= "__insert"; //$NON-NLS-1$ /** * Identifies a remove operation. */ final static public String REMOVE= "__remove"; //$NON-NLS-1$ /** The region's offset. */ private int fOffset; /** The region's length. */ private int fLength; /** Indicates the type of the applied change. */ private String fType; /** The text which has been inserted. */ private String fText; /** * Creates a new dirty region. * * @param offset the offset within the document where the change occurred * @param length the length of the text within the document that changed * @param type the type of change that this region represents: {@link #INSERT} {@link #REMOVE} * @param text the substitution text */ public DirtyRegion(int offset, int length, String type, String text) { fOffset= offset; fLength= length; fType= normalizeTypeValue(type); fText= text; } /** * Computes the normalized type value to ensure that the implementation can use object identity rather * than equality. * * @param type the type value * @return the normalized type value or <code>null</code> * @since 3.1 */ private String normalizeTypeValue(String type) { if (INSERT.equals(type)) return INSERT; if (REMOVE.equals(type)) return REMOVE; return null; } /* * @see ITypedRegion#getOffset() */ public int getOffset() { return fOffset; } /* * @see ITypedRegion#getLength() */ public int getLength() { return fLength; } /* * @see ITypedRegion#getType */ public String getType() { return fType; } /** * Returns the text that changed as part of the region change. * * @return the changed text */ public String getText() { return fText; } /** * Modify the receiver so that it encompasses the region specified by the dirty region. * * @param dr the dirty region with which to merge */ void mergeWith(DirtyRegion dr) { int start= Math.min(fOffset, dr.fOffset); int end= Math.max(fOffset + fLength, dr.fOffset + dr.fLength); fOffset= start; fLength= end - start; fText= (dr.fText is null ? fText : (fText is null) ? dr.fText : fText + dr.fText); } }