| /******************************************************************************* |
| * Copyright (c) 2006 Sybase, Inc. 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: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.actions.link; |
| |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.jst.pagedesigner.dom.DOMRange; |
| import org.eclipse.jst.pagedesigner.dom.DOMRangeHelper; |
| import org.eclipse.jst.pagedesigner.dom.DOMRefPosition; |
| import org.eclipse.jst.pagedesigner.dom.IDOMPosition; |
| import org.eclipse.jst.pagedesigner.parts.TextEditPart; |
| import org.eclipse.jst.pagedesigner.viewer.DesignRange; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.Text; |
| |
| /** |
| * @author mengbo |
| * @version 1.5 |
| */ |
| public class LinkUtil { |
| /** |
| * @param part |
| * @param range |
| * @return the select text if part is a text node or null. |
| */ |
| public static String getSelectedText(EditPart part, DesignRange range) { |
| if (part instanceof TextEditPart) { |
| TextEditPart textPart = (TextEditPart) part; |
| int[] offsets = textPart.getSelectedRange(); |
| String displayData = textPart.getTextData(); |
| |
| String linkExp = displayData.substring(offsets[0], offsets[1]); |
| return linkExp; |
| } |
| return null; |
| } |
| |
| /** |
| * @param part |
| * @param range |
| * @return the text from part split if it is a text node or null |
| */ |
| public static Text splitDomText(EditPart part, DesignRange range) { |
| if (part instanceof TextEditPart) { |
| Text textNode = (Text) part.getModel(); |
| |
| DOMRange domRange = DOMRangeHelper.toDOMRange(range); |
| IDOMPosition start = domRange.getStartPosition(); |
| IDOMPosition end = domRange.getEndPosition(); |
| int domTempStartOffset = computeOffset(start, textNode); |
| int domTempEndOffset = computeOffset(end, textNode); |
| |
| int domStartOffset = Math.min(domTempStartOffset, domTempEndOffset); |
| int domEndOffset = Math.max(domTempStartOffset, domTempEndOffset); |
| |
| Text lastNode = textNode; |
| if (domStartOffset > 0) { |
| lastNode = textNode.splitText(domStartOffset); |
| } |
| lastNode = lastNode.splitText(domEndOffset - domStartOffset); |
| Text middleNode = (Text) lastNode.getPreviousSibling(); |
| return middleNode; |
| } |
| return null; |
| } |
| |
| private static int computeOffset(IDOMPosition pos, Text textNode) { |
| int domOffset = 0; |
| if (pos instanceof DOMRefPosition) { |
| DOMRefPosition rep = (DOMRefPosition) pos; |
| boolean forward = rep.isForward(); |
| Node refNode = rep.getReferenceNode(); |
| |
| if ((refNode != textNode) && forward || (refNode == textNode) |
| && !forward) { |
| domOffset = 0; |
| } else { |
| domOffset = textNode.getLength(); |
| } |
| } else { |
| domOffset = pos.getOffset(); |
| } |
| return domOffset; |
| } |
| } |