| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.text.projection; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.Position; |
| |
| /** |
| * Implementation of a child document based on <code>ProjectionDocument</code>. |
| * This class exists for compatibility reasons. |
| * <p> |
| * Internal class. Do not use. Public only for testing purposes. |
| * |
| * @since 3.0 |
| */ |
| public class ChildDocument extends ProjectionDocument { |
| |
| /** |
| * Position reflecting a visible region. The exclusive end offset of the position |
| * is considered being overlapping with the visible region. |
| */ |
| static private class VisibleRegion extends Position { |
| |
| public VisibleRegion(int offset, int length) { |
| super(offset, length); |
| } |
| |
| /** |
| * If offset is the end of the visible region and the length is 0, |
| * the offset is considered overlapping with the visible region. |
| * |
| * @see org.eclipse.jface.text.Position#overlapsWith(int, int) |
| */ |
| public boolean overlapsWith(int offset, int length) { |
| boolean appending= (offset == this.offset + this.length) && length == 0; |
| return appending || super.overlapsWith(offset, length); |
| } |
| } |
| |
| /** |
| * Creates a new child document. |
| * |
| * @param masterDocument @inheritDoc |
| */ |
| public ChildDocument(IDocument masterDocument) { |
| super(masterDocument); |
| } |
| |
| /** |
| * Returns the parent document of this child document. |
| * |
| * @return the parent document of this child document |
| * @see ProjectionDocument#getMasterDocument() |
| */ |
| public IDocument getParentDocument() { |
| return getMasterDocument(); |
| } |
| |
| /** |
| * Sets the parent document range covered by this child document to the |
| * given range. |
| * |
| * @param offset the offset of the range |
| * @param length the length of the range |
| * @throws BadLocationException if the given range is not valid |
| */ |
| public void setParentDocumentRange(int offset, int length) throws BadLocationException { |
| replaceMasterDocumentRanges(offset, length); |
| } |
| |
| /** |
| * Returns the parent document range of this child document. |
| * |
| * @return the parent document range of this child document |
| */ |
| public Position getParentDocumentRange() { |
| IRegion coverage= getProjectionMapping().getCoverage(); |
| return new VisibleRegion(coverage.getOffset(), coverage.getLength()); |
| } |
| } |