| /******************************************************************************* |
| * Copyright (c) 2008 Standards for Technology in Automotive Retail 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: |
| * David Carver - STAR - Initial API and implementation, based on a patch |
| * provided by Nik Matyushev in bug 195262. |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xsl.ui.internal.doubleclick; |
| |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion; |
| import org.eclipse.wst.xml.core.internal.regions.DOMRegionContext; |
| import org.eclipse.wst.xml.ui.internal.doubleclick.XMLDoubleClickStrategy; |
| |
| |
| /** |
| * XSLDoubleClickStrategy extends the XMLDoubleclickStrategy to take into |
| * account those areas that may be involved in XPath Expressions. |
| * |
| * |
| * @author dcarver |
| * |
| */ |
| public class XSLDoubleClickStrategy extends XMLDoubleClickStrategy { |
| protected static final char[] XML_DELIMITERS = { ' ', '\'', '\"', '[', ']', |
| '|', '(', ')', '{', '}', '=', '!' }; |
| protected static final char[] XML_PARENTHESIS = { '[', ']', '(', ')', '{', |
| '}' }; |
| |
| @Override |
| protected Point getWord(String string, int cursor) { |
| if (string == null) { |
| return null; |
| } |
| |
| int wordStart = 0; |
| int wordEnd = string.length(); |
| |
| wordStart = startOfWord(string, cursor, wordStart); |
| wordEnd = endOfWord(string, cursor, wordEnd); |
| wordEnd = checkXPathExpression(string, wordEnd); |
| |
| if ((wordStart == wordEnd) && !isQuoted(string)) { |
| wordStart = 0; |
| wordEnd = string.length(); |
| } |
| |
| return new Point(wordStart, wordEnd); |
| } |
| |
| private int checkXPathExpression(String string, int wordEnd) { |
| if (wordEnd < string.length() - 1) { |
| // check paranthesis |
| int[] flags = new int[XML_PARENTHESIS.length / 2]; |
| boolean found = false; |
| int pos = wordEnd; |
| do { |
| char cur = string.charAt(pos); |
| for (int i = 0; i < XML_PARENTHESIS.length; i++) { |
| if (cur == XML_PARENTHESIS[i]) { |
| flags[i / 2] += (i % 2 == 0 ? 1 : -1); |
| found = true; |
| } |
| } |
| boolean stop = true; |
| boolean unbalanced = false; |
| for (int i = 0; i < flags.length; i++) { |
| stop = stop && flags[i] == 0; |
| unbalanced |= flags[i] < 0; |
| } |
| |
| if (!unbalanced) { |
| pos++; |
| } |
| if (stop | unbalanced) { |
| break; |
| } |
| } while (pos < string.length()); |
| |
| if (found) { |
| wordEnd = Math.min(string.length() - 1, pos); |
| } |
| } |
| return wordEnd; |
| } |
| |
| private int endOfWord(String string, int cursor, int wordEnd) { |
| for (int i = 0; i < XML_DELIMITERS.length; i++) { |
| char delim = XML_DELIMITERS[i]; |
| int end = string.indexOf(delim, cursor); |
| wordEnd = Math.min(wordEnd, end == -1 ? string.length() : end); |
| } |
| |
| if (wordEnd == string.length()) { |
| wordEnd = cursor; |
| } |
| return wordEnd; |
| } |
| |
| protected int startOfWord(String string, int cursor, int wordStart) { |
| for (int i = 0; i < XML_DELIMITERS.length; i++) { |
| char delim = XML_DELIMITERS[i]; |
| wordStart = Math.max(wordStart, string.lastIndexOf(delim, |
| cursor - 1)); |
| } |
| |
| if (wordStart == -1) { |
| wordStart = cursor; |
| } else { |
| wordStart++; |
| } |
| return wordStart; |
| } |
| |
| } |