| /******************************************************************************* |
| * Copyright (c) 2004 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 |
| *******************************************************************************/ |
| package org.eclipse.wst.css.core.internal.util; |
| |
| |
| |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion; |
| |
| /** |
| * |
| */ |
| public class RegionIterator { |
| |
| private IStructuredDocumentRegion documentRegion = null; |
| private IStructuredDocumentRegion curDocumentRegion = null; |
| private int current = -1; |
| |
| /** |
| * |
| */ |
| public RegionIterator(IStructuredDocument structuredDocument, int index) { |
| super(); |
| |
| reset(structuredDocument, index); |
| } |
| |
| /** |
| * |
| */ |
| public RegionIterator(IStructuredDocumentRegion flatNode, ITextRegion region) { |
| super(); |
| reset(flatNode, region); |
| } |
| |
| /** |
| * |
| */ |
| public IStructuredDocumentRegion getStructuredDocumentRegion() { |
| return curDocumentRegion; |
| } |
| |
| /** |
| * |
| */ |
| public boolean hasNext() { |
| if (documentRegion == null) |
| return false; |
| if (current < 0) |
| return false; |
| if (current < documentRegion.getRegions().size()) |
| return true; |
| return false; |
| } |
| |
| /** |
| * |
| */ |
| public boolean hasPrev() { |
| // the same as hasNext() |
| return hasNext(); |
| } |
| |
| /** |
| * |
| */ |
| public ITextRegion next() { |
| if (documentRegion == null) |
| return null; |
| if (current < 0 || documentRegion.getRegions() == null || documentRegion.getRegions().size() <= current) |
| return null; |
| |
| ITextRegion region = documentRegion.getRegions().get(current); |
| curDocumentRegion = documentRegion; |
| |
| if (current >= documentRegion.getRegions().size() - 1) { |
| documentRegion = documentRegion.getNext(); |
| current = -1; |
| } |
| current++; |
| |
| return region; |
| } |
| |
| /** |
| * |
| */ |
| public ITextRegion prev() { |
| if (documentRegion == null) |
| return null; |
| if (current < 0 || documentRegion.getRegions() == null || documentRegion.getRegions().size() <= current) |
| return null; |
| |
| ITextRegion region = documentRegion.getRegions().get(current); |
| curDocumentRegion = documentRegion; |
| |
| if (current == 0) { |
| documentRegion = documentRegion.getPrevious(); |
| if (documentRegion != null) |
| current = documentRegion.getRegions().size(); |
| else |
| current = 0; |
| } |
| current--; |
| |
| return region; |
| } |
| |
| /** |
| * |
| */ |
| public void reset(IStructuredDocument structuredDocument, int index) { |
| documentRegion = structuredDocument.getRegionAtCharacterOffset(index); |
| curDocumentRegion = documentRegion; |
| if (documentRegion != null) { |
| ITextRegion region = documentRegion.getRegionAtCharacterOffset(index); |
| current = documentRegion.getRegions().indexOf(region); |
| } |
| } |
| |
| /** |
| * |
| */ |
| public void reset(IStructuredDocumentRegion flatNode, ITextRegion region) { |
| if (region != null && flatNode != null) { |
| this.documentRegion = flatNode; |
| curDocumentRegion = flatNode; |
| current = flatNode.getRegions().indexOf(region); |
| } |
| } |
| } |