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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.util.Iterator;
  15
  16 import net.sourceforge.phpdt.internal.ui.text.HTMLPrinter;
  17 import net.sourceforge.phpdt.ui.PreferenceConstants;
  18 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  19 import net.sourceforge.phpeclipse.phpeditor.JavaAnnotationIterator;
  20 import net.sourceforge.phpeclipse.phpeditor.PHPUnitEditor;
  21
  22 import org.eclipse.jface.preference.IPreferenceStore;
  23 import org.eclipse.jface.text.IRegion;
  24 import org.eclipse.jface.text.ITextViewer;
  25 import org.eclipse.jface.text.Position;
  26 import org.eclipse.jface.text.source.Annotation;
  27 import org.eclipse.jface.text.source.IAnnotationModel;
  28 import org.eclipse.ui.IEditorPart;
  29 import org.eclipse.ui.editors.text.EditorsUI;
  30 import org.eclipse.ui.texteditor.AnnotationPreference;
  31 import org.eclipse.ui.texteditor.DefaultMarkerAnnotationAccess;
  32 import org.eclipse.ui.texteditor.IDocumentProvider;
  33
  34
  35 public class AnnotationHover extends AbstractJavaEditorTextHover {
  36
  37         private IPreferenceStore fStore= PHPeclipsePlugin.getDefault().getPreferenceStore();
  38         private DefaultMarkerAnnotationAccess fAnnotationAccess= new DefaultMarkerAnnotationAccess();
  39
  40         /*
  41          * Formats a message as HTML text.
  42          */
  43         private String formatMessage(String message) {
  44                 StringBuffer buffer= new StringBuffer();
  45                 HTMLPrinter.addPageProlog(buffer);
  46                 HTMLPrinter.addParagraph(buffer, HTMLPrinter.convertToHTMLContent(message));
  47                 HTMLPrinter.addPageEpilog(buffer);
  48                 return buffer.toString();
  49         }
  50
  51         /*
  52          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  53          */
  54         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  55
  56                 if (getEditor() == null)
  57                         return null;
  58
  59                 IDocumentProvider provider= PHPeclipsePlugin.getDefault().getCompilationUnitDocumentProvider();
  60                 IAnnotationModel model= provider.getAnnotationModel(getEditor().getEditorInput());
  61
  62                 if (model != null) {
  63                         Iterator e= new JavaAnnotationIterator(model, true);
  64                         int layer= -1;
  65                         String message= null;
  66                         while (e.hasNext()) {
  67                                 Annotation a= (Annotation) e.next();
  68
  69                                 AnnotationPreference preference= getAnnotationPreference(a);
  70                                 if (preference == null || !(fStore.getBoolean(preference.getTextPreferenceKey()) || (preference.getHighlightPreferenceKey() != null && fStore.getBoolean(preference.getHighlightPreferenceKey()))))
  71                                         continue;
  72
  73                                 Position p= model.getPosition(a);
  74
  75                                 int l= fAnnotationAccess.getLayer(a);
  76
  77                                 if (l > layer && p != null && p.overlapsWith(hoverRegion.getOffset(), hoverRegion.getLength())) {
  78                                         String msg= a.getText();
  79                                         if (msg != null && msg.trim().length() > 0) {
  80                                                 message= msg;
  81                                                 layer= l;
  82                                         }
  83                                 }
  84                         }
  85                         if (layer > -1)
  86                                 return formatMessage(message);
  87                 }
  88
  89                 return null;
  90         }
  91
  92         /*
  93          * @see IJavaEditorTextHover#setEditor(IEditorPart)
  94          */
  95         public void setEditor(IEditorPart editor) {
  96                 if (editor instanceof PHPUnitEditor)
  97                         super.setEditor(editor);
  98                 else
  99                         super.setEditor(null);
 100         }
 101
 102         /**
 103          * Returns the annotation preference for the given annotation.
 104          *
 105          * @param annotation the annotation
 106          * @return the annotation preference or <code>null</code> if none
 107          */
 108         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 109
 110                 if (annotation.isMarkedDeleted())
 111                         return null;
 112                 return EditorsUI.getAnnotationPreferenceLookup().getAnnotationPreference(annotation);
 113         }
 114
 115         static boolean isJavaProblemHover(String id) {
 116                 return PreferenceConstants.ID_PROBLEM_HOVER.equals(id);
 117         }
 118 }