net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/PHPTextHover.java

   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
   7
   8  Contributors:
   9  IBM Corporation - Initial implementation
  10  www.phpeclipse.de
  11  **********************************************************************/
  12 package net.sourceforge.phpeclipse.phpeditor;
  13
  14 import java.util.ArrayList;
  15 import java.util.HashMap;
  16 import java.util.List;
  17
  18 import net.sourceforge.phpdt.internal.corext.phpdoc.PHPDocUtil;
  19 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  20 import net.sourceforge.phpeclipse.builder.IdentifierIndexManager;
  21 import net.sourceforge.phpeclipse.builder.PHPIdentifierLocation;
  22 import net.sourceforge.phpeclipse.phpeditor.php.PHPElement;
  23 import net.sourceforge.phpeclipse.phpeditor.php.PHPFunction;
  24 import net.sourceforge.phpeclipse.phpeditor.php.PHPWordExtractor;
  25
  26 import org.eclipse.core.resources.IProject;
  27 import org.eclipse.jface.text.IRegion;
  28 import org.eclipse.jface.text.ITextHover;
  29 import org.eclipse.jface.text.ITextViewer;
  30 import org.eclipse.jface.text.Region;
  31 import org.eclipse.swt.graphics.Point;
  32
  33 /**
  34  * Implementation for an <code>ITextHover</code> which hovers over PHP code.
  35  */
  36 public class PHPTextHover implements ITextHover {
  37         private static HashMap functionDescriptions = null;
  38
  39         private static HashMap identDescriptions = null;
  40
  41         /**
  42          * The current project; maybe <code>null</code> for preference pages
  43          */
  44         private IProject fProject;
  45
  46         public PHPTextHover(IProject project) {
  47                 fProject = project;
  48         }
  49
  50         /*
  51          * (non-Javadoc) Method declared on ITextHover
  52          */
  53         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  54                 if (hoverRegion != null) {
  55                         try {
  56                                 if (hoverRegion.getLength() > -1) {
  57                                         String word = textViewer.getDocument().get(
  58                                                         hoverRegion.getOffset(), hoverRegion.getLength());
  59                                         if (functionDescriptions == null) {
  60                                                 functionDescriptions = new HashMap();
  61                                                 identDescriptions = new HashMap();
  62                                                 ArrayList syntaxbuffer = PHPSyntaxRdr.getSyntaxData();
  63                                                 PHPElement elbuffer = null;
  64                                                 if (syntaxbuffer != null) {
  65                                                         for (int i = 0; i < syntaxbuffer.size(); i++) {
  66                                                                 elbuffer = (PHPElement) syntaxbuffer.get(i);
  67                                                                 if (elbuffer instanceof PHPFunction) {
  68                                                                         functionDescriptions.put(
  69                                                                                         elbuffer.getName(), elbuffer
  70                                                                                                         .getHoverText());
  71                                                                 } else {
  72                                                                         identDescriptions.put(elbuffer.getName(),
  73                                                                                         elbuffer.getHoverText());
  74                                                                 }
  75                                                         }
  76                                                 }
  77                                                 //
  78                                                 // while ((syntaxbuffer != null)
  79                                                 // && (!syntaxbuffer.isEmpty() && ((elbuffer =
  80                                                 // (PHPElement)
  81                                                 // syntaxbuffer.remove(0)) != null))) {
  82                                                 // functionDescriptions.put(elbuffer.getName(),
  83                                                 // elbuffer.getHoverText());
  84                                                 // }
  85                                         }
  86                                         String hoverInfo = (String) identDescriptions.get(word);
  87                                         if (hoverInfo == null & word.length() > 0) {
  88                                                 hoverInfo = (String) functionDescriptions.get(word
  89                                                                 .toLowerCase());
  90                                         }
  91                                         if (hoverInfo == null && fProject != null) {
  92                                                 // get the possible PHPDoc information from the index
  93                                                 // file
  94                                                 IdentifierIndexManager indexManager = PHPeclipsePlugin
  95                                                                 .getDefault().getIndexManager(fProject);
  96                                                 List list = indexManager.getLocations(word);
  97                                                 if (list.size() > 0) {
  98                                                         try {
  99                                                                 PHPIdentifierLocation location;
 100                                                                 String filename;
 101                                                                 StringBuffer hoverInfoBuffer = new StringBuffer();
 102                                                                 String workspaceLocation;
 103                                                                 if (fProject != null) {
 104                                                                         workspaceLocation = fProject.getLocation()
 105                                                                                         .toString() + '/';
 106                                                                 } else {
 107                                                                         // should never happen?
 108                                                                         workspaceLocation = PHPeclipsePlugin
 109                                                                                         .getWorkspace().getRoot()
 110                                                                                         .getLocation().toString();
 111                                                                 }
 112                                                                 // boolean foundPHPdoc = false;
 113                                                                 for (int i = 0; i < list.size(); i++) {
 114                                                                         location = (PHPIdentifierLocation) list
 115                                                                                         .get(i);
 116                                                                         filename = workspaceLocation
 117                                                                                         + location.getFilename();
 118                                                                         PHPDocUtil.appendPHPDoc(hoverInfoBuffer,
 119                                                                                         filename, location);
 120                                                                 }
 121                                                                 hoverInfo = hoverInfoBuffer.toString();
 122                                                         } catch (Throwable e) {
 123                                                                 // ignore exceptions
 124                                                                 e.printStackTrace();
 125                                                         }
 126                                                 }
 127                                         }
 128                                         return hoverInfo;
 129                                 }
 130                                 // } catch (BadLocationException x) {
 131                         } catch (Exception x) {
 132                         }
 133                 }
 134                 return null;
 135                 // don't show this annoying text
 136                 // return "empty selection";
 137         }
 138
 139         /*
 140          * (non-Javadoc) Method declared on ITextHover
 141          */
 142         public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
 143                 Point selection = PHPWordExtractor.findWord(textViewer.getDocument(),
 144                                 offset);
 145                 // show the extracted word as a tooltip
 146                 if (selection != null && selection.x <= offset
 147                                 && offset < selection.x + selection.y)
 148                         return new Region(selection.x, selection.y);
 149                 return new Region(offset, 0);
 150         }
 151 }