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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 public class AnnotationHover extends AbstractJavaEditorTextHover {
  39
  40         // private IPreferenceStore fStore =
  41         // PHPeclipsePlugin.getDefault().getPreferenceStore();
  42         private IPreferenceStore fStore = EditorsUI.getPreferenceStore();
  43
  44         private DefaultMarkerAnnotationAccess fAnnotationAccess = new DefaultMarkerAnnotationAccess();
  45
  46         private PHPTextHover fPHPTextHover = null;
  47
  48         /*
  49          * Formats a message as HTML text.
  50          */
  51         private String formatMessage(String message) {
  52                 StringBuffer buffer = new StringBuffer();
  53                 HTMLPrinter.addPageProlog(buffer);
  54                 HTMLPrinter.addParagraph(buffer, message); // HTMLPrinter.convertToHTMLContent(message));
  55                 HTMLPrinter.addPageEpilog(buffer);
  56                 return buffer.toString();
  57         }
  58
  59         /*
  60          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  61          */
  62         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  63
  64                 if (getEditor() == null)
  65                         return null;
  66
  67                 IDocumentProvider provider = PHPeclipsePlugin.getDefault()
  68                                 .getCompilationUnitDocumentProvider();
  69                 IAnnotationModel model = provider.getAnnotationModel(getEditor()
  70                                 .getEditorInput());
  71                 String message = null;
  72                 if (model != null) {
  73                         Iterator e = new JavaAnnotationIterator(model, true);
  74                         int layer = -1;
  75
  76                         while (e.hasNext()) {
  77                                 Annotation a = (Annotation) e.next();
  78
  79                                 AnnotationPreference preference = getAnnotationPreference(a);
  80                                 if (preference == null
  81                                                 || !(fStore.getBoolean(preference
  82                                                                 .getTextPreferenceKey()) || (preference
  83                                                                 .getHighlightPreferenceKey() != null && fStore
  84                                                                 .getBoolean(preference
  85                                                                                 .getHighlightPreferenceKey()))))
  86                                         continue;
  87
  88                                 Position p = model.getPosition(a);
  89
  90                                 int l = fAnnotationAccess.getLayer(a);
  91
  92                                 if (l > layer
  93                                                 && p != null
  94                                                 && p.overlapsWith(hoverRegion.getOffset(), hoverRegion
  95                                                                 .getLength())) {
  96                                         String msg = a.getText();
  97                                         if (msg != null && msg.trim().length() > 0) {
  98                                                 message = msg;
  99                                                 layer = l;
 100                                         }
 101                                 }
 102                         }
 103                         if (layer > -1)
 104                                 return formatMessage(message);
 105                 }
 106                 // Added as long as the above doesn't work
 107                 if (fPHPTextHover != null) {
 108                         message = fPHPTextHover.getHoverInfo(textViewer, hoverRegion);
 109                         if (message != null) {
 110                                 return formatMessage(message);
 111                         }
 112                 }
 113                 return null;
 114         }
 115
 116         /*
 117          * @see IJavaEditorTextHover#setEditor(IEditorPart)
 118          */
 119         public void setEditor(IEditorPart editor) {
 120                 if (editor instanceof PHPUnitEditor) {
 121                         super.setEditor(editor);
 122                         if (editor != null) {
 123                                 IEditorInput editorInput = editor.getEditorInput();
 124                                 if (editorInput instanceof IFileEditorInput) {
 125                                         try {
 126                                                 IFile f = ((IFileEditorInput) editorInput).getFile();
 127                                                 fPHPTextHover = new PHPTextHover(f.getProject());
 128                                                 return;
 129                                         } catch (NullPointerException e) {
 130                                                 // this exception occurs, if getTextHover is called by
 131                                                 // preference pages !
 132                                         }
 133                                 }
 134                         }
 135                         fPHPTextHover = new PHPTextHover(null);
 136                 } else {
 137                         super.setEditor(null);
 138                 }
 139         }
 140
 141         /**
 142          * Returns the annotation preference for the given annotation.
 143          *
 144          * @param annotation
 145          *            the annotation
 146          * @return the annotation preference or <code>null</code> if none
 147          */
 148         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 149
 150                 if (annotation.isMarkedDeleted())
 151                         return null;
 152                 return EditorsUI.getAnnotationPreferenceLookup()
 153                                 .getAnnotationPreference(annotation);
 154         }
 155
 156         static boolean isJavaProblemHover(String id) {
 157                 return PreferenceConstants.ID_PROBLEM_HOVER.equals(id);
 158         }
 159 }