1 /**********************************************************************
2 Copyright (c) 2000, 2002 IBM Corp. and others.
3 All rights reserved. This program and the accompanying materials
4 are made available under the terms of the Common Public License v1.0
5 which accompanies this distribution, and is available at
6 http://www.eclipse.org/legal/cpl-v10.html
9 IBM Corporation - Initial implementation
10 Klaus Hartlage - www.eclipseproject.de
11 **********************************************************************/
12 package net.sourceforge.phpeclipse.phpeditor;
14 import java.util.HashMap;
16 import net.sourceforge.phpeclipse.phpeditor.php.PHPFunctionDescription;
17 import net.sourceforge.phpeclipse.phpeditor.php.PHPFunctionNames;
18 import net.sourceforge.phpeclipse.phpeditor.php.PHPWordExtractor;
19 import org.eclipse.jface.text.BadLocationException;
20 import org.eclipse.jface.text.IRegion;
21 import org.eclipse.jface.text.ITextHover;
22 import org.eclipse.jface.text.ITextViewer;
23 import org.eclipse.jface.text.Region;
24 import org.eclipse.swt.graphics.Point;
27 * Example implementation for an <code>ITextHover</code>
28 * which hovers over PHP code.
30 public class PHPTextHover implements ITextHover {
31 public static HashMap functionDescriptions = null;
33 private static PHPWordExtractor phpWordDetector = new PHPWordExtractor();
35 * Method declared on ITextHover
37 public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
38 if (hoverRegion != null) {
40 if (hoverRegion.getLength() > -1) {
41 String word = textViewer.getDocument().get(hoverRegion.getOffset(), hoverRegion.getLength());
42 if (functionDescriptions==null) {
43 functionDescriptions = new HashMap(997);
44 for (int i=0; i<PHPFunctionNames.FUNCTION_NAMES.length;i++) {
45 functionDescriptions.put(PHPFunctionNames.FUNCTION_NAMES[i],PHPFunctionDescription.FUNCTION_DESCRIPTION[i]);
48 return (String) functionDescriptions.get(word);
50 } catch (BadLocationException x) {
53 return "empty selection";
57 * Method declared on ITextHover
59 public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
60 Point selection = PHPWordExtractor.findWord(textViewer.getDocument(), offset);
61 // show the extracted word as a tooltip
62 if (selection!=null && selection.x <= offset && offset < selection.x + selection.y)
63 return new Region(selection.x, selection.y);
64 return new Region(offset, 0);