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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.PHPTextHover;
  21 import net.sourceforge.phpeclipse.phpeditor.PHPUnitEditor;
  22
  23 import org.eclipse.core.resources.IFile;
  24 import org.eclipse.jface.preference.IPreferenceStore;
  25 import org.eclipse.jface.text.IRegion;
  26 import org.eclipse.jface.text.ITextViewer;
  27 import org.eclipse.jface.text.Position;
  28 import org.eclipse.jface.text.source.Annotation;
  29 import org.eclipse.jface.text.source.IAnnotationModel;
  30 import org.eclipse.ui.IEditorInput;
  31 import org.eclipse.ui.IEditorPart;
  32 import org.eclipse.ui.IFileEditorInput;
  33 import org.eclipse.ui.editors.text.EditorsUI;
  34 import org.eclipse.ui.texteditor.AnnotationPreference;
  35 import org.eclipse.ui.texteditor.DefaultMarkerAnnotationAccess;
  36 import org.eclipse.ui.texteditor.IDocumentProvider;
  37
  38
  39 public class AnnotationHover extends AbstractJavaEditorTextHover {
  40
  41         private IPreferenceStore fStore= PHPeclipsePlugin.getDefault().getPreferenceStore();
  42         private DefaultMarkerAnnotationAccess fAnnotationAccess= new DefaultMarkerAnnotationAccess();
  43         private PHPTextHover fPHPTextHover = null;
  44         /*
  45          * Formats a message as HTML text.
  46          */
  47         private String formatMessage(String message) {
  48                 StringBuffer buffer= new StringBuffer();
  49                 HTMLPrinter.addPageProlog(buffer);
  50                 HTMLPrinter.addParagraph(buffer, HTMLPrinter.convertToHTMLContent(message));
  51                 HTMLPrinter.addPageEpilog(buffer);
  52                 return buffer.toString();
  53         }
  54
  55         /*
  56          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  57          */
  58         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  59
  60                 if (getEditor() == null)
  61                         return null;
  62
  63                 IDocumentProvider provider= PHPeclipsePlugin.getDefault().getCompilationUnitDocumentProvider();
  64                 IAnnotationModel model= provider.getAnnotationModel(getEditor().getEditorInput());
  65                 String message= null;
  66                 if (model != null) {
  67                         Iterator e= new JavaAnnotationIterator(model, true);
  68                         int layer= -1;
  69
  70                         while (e.hasNext()) {
  71                                 Annotation a= (Annotation) e.next();
  72
  73                                 AnnotationPreference preference= getAnnotationPreference(a);
  74                                 if (preference == null || !(fStore.getBoolean(preference.getTextPreferenceKey()) || (preference.getHighlightPreferenceKey() != null && fStore.getBoolean(preference.getHighlightPreferenceKey()))))
  75                                         continue;
  76
  77                                 Position p= model.getPosition(a);
  78
  79                                 int l= fAnnotationAccess.getLayer(a);
  80
  81                                 if (l > layer && p != null && p.overlapsWith(hoverRegion.getOffset(), hoverRegion.getLength())) {
  82                                         String msg= a.getText();
  83                                         if (msg != null && msg.trim().length() > 0) {
  84                                                 message= msg;
  85                                                 layer= l;
  86                                         }
  87                                 }
  88                         }
  89                         if (layer > -1)
  90                                 return formatMessage(message);
  91                 }
  92                 // Added as long as the above doesn't work
  93                 if (fPHPTextHover!=null) {
  94                   message = fPHPTextHover.getHoverInfo(textViewer, hoverRegion);
  95                   if (message!=null) {
  96                     return formatMessage(message);
  97                   }
  98                 }
  99                 return null;
 100         }
 101
 102         /*
 103          * @see IJavaEditorTextHover#setEditor(IEditorPart)
 104          */
 105         public void setEditor(IEditorPart editor) {
 106                 if (editor instanceof PHPUnitEditor) {
 107                         super.setEditor(editor);
 108                         if (editor != null) {
 109                                 IEditorInput editorInput = editor.getEditorInput();
 110                                 if (editorInput instanceof IFileEditorInput) {
 111                                         try {
 112                                                 IFile f = ((IFileEditorInput) editorInput).getFile();
 113                                                 fPHPTextHover = new PHPTextHover(f.getProject());
 114                                             return;
 115                                         } catch (NullPointerException e) {
 116                                                 // this exception occurs, if getTextHover is called by
 117                                                 // preference pages !
 118                                         }
 119                                 }
 120                         }
 121                         fPHPTextHover = new PHPTextHover(null);
 122                 } else {
 123                         super.setEditor(null);
 124                 }
 125         }
 126
 127         /**
 128          * Returns the annotation preference for the given annotation.
 129          *
 130          * @param annotation the annotation
 131          * @return the annotation preference or <code>null</code> if none
 132          */
 133         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 134
 135                 if (annotation.isMarkedDeleted())
 136                         return null;
 137                 return EditorsUI.getAnnotationPreferenceLookup().getAnnotationPreference(annotation);
 138         }
 139
 140         static boolean isJavaProblemHover(String id) {
 141                 return PreferenceConstants.ID_PROBLEM_HOVER.equals(id);
 142         }
 143 }