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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation 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 API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpdt.internal.ui.text.java.hover;
  13
  14 import java.io.IOException;
  15
  16 import net.sourceforge.phpdt.core.IJavaElement;
  17 import net.sourceforge.phpdt.core.IMember;
  18 import net.sourceforge.phpdt.core.ISourceReference;
  19 import net.sourceforge.phpdt.core.JavaModelException;
  20 import net.sourceforge.phpdt.internal.ui.text.HTMLPrinter;
  21 import net.sourceforge.phpdt.internal.ui.text.PHPCodeReader;
  22 import net.sourceforge.phpdt.internal.ui.viewsupport.JavaElementLabels;
  23 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  24
  25 import org.eclipse.jface.text.Document;
  26 import org.eclipse.jface.text.IDocument;
  27
  28 /**
  29  * Provides source as hover info for Java elements.
  30  */
  31 public class JavaSourceHover extends AbstractJavaEditorTextHover {
  32
  33         private final int LABEL_FLAGS = JavaElementLabels.ALL_FULLY_QUALIFIED
  34                         | JavaElementLabels.M_PRE_RETURNTYPE
  35                         | JavaElementLabels.M_PARAMETER_TYPES
  36                         | JavaElementLabels.M_PARAMETER_NAMES
  37                         | JavaElementLabels.M_EXCEPTIONS
  38                         | JavaElementLabels.F_PRE_TYPE_SIGNATURE;
  39
  40         /*
  41          * @see JavaElementHover
  42          */
  43         protected String getHoverInfo(IJavaElement[] result) {
  44                 int nResults = result.length;
  45                 StringBuffer buffer = new StringBuffer();
  46
  47                 if (nResults > 1) {
  48
  49                         for (int i = 0; i < result.length; i++) {
  50                                 HTMLPrinter.startBulletList(buffer);
  51                                 IJavaElement curr = result[i];
  52                                 if (curr instanceof IMember)
  53                                         HTMLPrinter.addBullet(buffer, getInfoText((IMember) curr));
  54                                 HTMLPrinter.endBulletList(buffer);
  55                         }
  56
  57                 } else {
  58
  59                         IJavaElement curr = result[0];
  60                         if (curr instanceof IMember && curr instanceof ISourceReference) {
  61                                 HTMLPrinter.addSmallHeader(buffer,
  62                                                 getInfoText(((IMember) curr)));
  63                                 try {
  64                                         String source = ((ISourceReference) curr).getSource();
  65                                         source = removeLeadingComments(source);
  66                                         HTMLPrinter.addParagraph(buffer, "<pre>"); //$NON-NLS-1$
  67                                         HTMLPrinter.addParagraph(buffer, source);
  68                                         HTMLPrinter.addParagraph(buffer, "</pre>"); //$NON-NLS-1$
  69                                 } catch (JavaModelException ex) {
  70                                         // only write small header
  71                                 }
  72                         }
  73                 }
  74
  75                 if (buffer.length() > 0) {
  76                         HTMLPrinter.insertPageProlog(buffer, 0);
  77                         HTMLPrinter.addPageEpilog(buffer);
  78                         return buffer.toString();
  79                 }
  80
  81                 return null;
  82         }
  83
  84         private String getInfoText(IMember member) {
  85                 return JavaElementLabels.getElementLabel(member, LABEL_FLAGS);
  86         }
  87
  88         private String removeLeadingComments(String source) {
  89                 PHPCodeReader reader = new PHPCodeReader();
  90                 IDocument document = new Document(source);
  91                 int i;
  92                 try {
  93                         reader.configureForwardReader(document, 0, document.getLength(),
  94                                         true, false);
  95                         int c = reader.read();
  96                         while (c != -1 && (c == '\r' || c == '\n')) {
  97                                 c = reader.read();
  98                         }
  99                         i = reader.getOffset();
 100                         reader.close();
 101                 } catch (IOException ex) {
 102                         i = 0;
 103                 } finally {
 104                         try {
 105                                 if (reader != null)
 106                                         reader.close();
 107                         } catch (IOException ex) {
 108                                 PHPeclipsePlugin.log(ex);
 109                         }
 110                 }
 111
 112                 if (i < 0)
 113                         return source;
 114                 return source.substring(i);
 115         }
 116 }