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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 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.phpeclipse.PHPeclipsePlugin;
  18 import net.sourceforge.phpeclipse.phpeditor.JavaAnnotationIterator;
  19 import net.sourceforge.phpeclipse.phpeditor.PHPUnitEditor;
  20
  21 import org.eclipse.jface.preference.IPreferenceStore;
  22 import org.eclipse.jface.text.IRegion;
  23 import org.eclipse.jface.text.ITextViewer;
  24 import org.eclipse.jface.text.Position;
  25 import org.eclipse.jface.text.source.Annotation;
  26 import org.eclipse.jface.text.source.IAnnotationModel;
  27 import org.eclipse.ui.IEditorPart;
  28 import org.eclipse.ui.editors.text.EditorsUI;
  29 import org.eclipse.ui.texteditor.AnnotationPreference;
  30 import org.eclipse.ui.texteditor.DefaultMarkerAnnotationAccess;
  31 import org.eclipse.ui.texteditor.IDocumentProvider;
  32
  33 /**
  34  * Abstract super class for annotation hovers.
  35  *
  36  * @since 3.0
  37  */
  38 public abstract class AbstractAnnotationHover extends
  39                 AbstractJavaEditorTextHover {
  40
  41         private IPreferenceStore fStore = PHPeclipsePlugin.getDefault()
  42                         .getCombinedPreferenceStore();
  43
  44         private DefaultMarkerAnnotationAccess fAnnotationAccess = new DefaultMarkerAnnotationAccess();
  45
  46         private boolean fAllAnnotations;
  47
  48         public AbstractAnnotationHover(boolean allAnnotations) {
  49                 fAllAnnotations = allAnnotations;
  50         }
  51
  52         /*
  53          * Formats a message as HTML text.
  54          */
  55         private String formatMessage(String message) {
  56                 StringBuffer buffer = new StringBuffer();
  57                 HTMLPrinter.addPageProlog(buffer);
  58                 HTMLPrinter.addParagraph(buffer, HTMLPrinter
  59                                 .convertToHTMLContent(message));
  60                 HTMLPrinter.addPageEpilog(buffer);
  61                 return buffer.toString();
  62         }
  63
  64         /*
  65          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  66          */
  67         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  68
  69                 if (getEditor() == null)
  70                         return null;
  71
  72                 IDocumentProvider provider = PHPeclipsePlugin.getDefault()
  73                                 .getCompilationUnitDocumentProvider();
  74                 IAnnotationModel model = provider.getAnnotationModel(getEditor()
  75                                 .getEditorInput());
  76
  77                 if (model != null) {
  78                         Iterator e = new JavaAnnotationIterator(model, true,
  79                                         fAllAnnotations);
  80                         int layer = -1;
  81                         String message = null;
  82                         while (e.hasNext()) {
  83                                 Annotation a = (Annotation) e.next();
  84
  85                                 AnnotationPreference preference = getAnnotationPreference(a);
  86                                 if (preference == null
  87                                                 || !(preference.getTextPreferenceKey() != null
  88                                                                 && fStore.getBoolean(preference
  89                                                                                 .getTextPreferenceKey()) || (preference
  90                                                                 .getHighlightPreferenceKey() != null && fStore
  91                                                                 .getBoolean(preference
  92                                                                                 .getHighlightPreferenceKey()))))
  93                                         continue;
  94
  95                                 Position p = model.getPosition(a);
  96
  97                                 int l = fAnnotationAccess.getLayer(a);
  98
  99                                 if (l > layer
 100                                                 && p != null
 101                                                 && p.overlapsWith(hoverRegion.getOffset(), hoverRegion
 102                                                                 .getLength())) {
 103                                         String msg = a.getText();
 104                                         if (msg != null && msg.trim().length() > 0) {
 105                                                 message = msg;
 106                                                 layer = l;
 107                                         }
 108                                 }
 109                         }
 110                         if (layer > -1)
 111                                 return formatMessage(message);
 112                 }
 113
 114                 return null;
 115         }
 116
 117         /*
 118          * @see IJavaEditorTextHover#setEditor(IEditorPart)
 119          */
 120         public void setEditor(IEditorPart editor) {
 121                 if (editor instanceof PHPUnitEditor)
 122                         super.setEditor(editor);
 123                 else
 124                         super.setEditor(null);
 125         }
 126
 127         /**
 128          * Returns the annotation preference for the given annotation.
 129          *
 130          * @param annotation
 131          *            the annotation
 132          * @return the annotation preference or <code>null</code> if none
 133          */
 134         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 135
 136                 if (annotation.isMarkedDeleted())
 137                         return null;
 138                 return EditorsUI.getAnnotationPreferenceLookup()
 139                                 .getAnnotationPreference(annotation);
 140         }
 141 }