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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 import net.sourceforge.phpeclipse.ui.WebUI;
  23
  24 import org.eclipse.core.resources.IFile;
  25 import org.eclipse.jface.preference.IPreferenceStore;
  26 import org.eclipse.jface.text.IRegion;
  27 import org.eclipse.jface.text.ITextViewer;
  28 import org.eclipse.jface.text.Position;
  29 import org.eclipse.jface.text.source.Annotation;
  30 import org.eclipse.jface.text.source.IAnnotationModel;
  31 import org.eclipse.ui.IEditorInput;
  32 import org.eclipse.ui.IEditorPart;
  33 import org.eclipse.ui.IFileEditorInput;
  34 import org.eclipse.ui.editors.text.EditorsUI;
  35 import org.eclipse.ui.texteditor.AnnotationPreference;
  36 import org.eclipse.ui.texteditor.DefaultMarkerAnnotationAccess;
  37 import org.eclipse.ui.texteditor.IDocumentProvider;
  38
  39 public class AnnotationHover extends AbstractJavaEditorTextHover {
  40
  41         // private IPreferenceStore fStore =
  42         // PHPeclipsePlugin.getDefault().getPreferenceStore();
  43         private IPreferenceStore fStore = EditorsUI.getPreferenceStore();
  44
  45         private DefaultMarkerAnnotationAccess fAnnotationAccess = new DefaultMarkerAnnotationAccess();
  46
  47         private PHPTextHover fPHPTextHover = null;
  48
  49         /*
  50          * Formats a message as HTML text.
  51          */
  52         private String formatMessage(String message) {
  53                 StringBuffer buffer = new StringBuffer();
  54                 HTMLPrinter.addPageProlog(buffer);
  55                 HTMLPrinter.addParagraph(buffer, message); // HTMLPrinter.convertToHTMLContent(message));
  56                 HTMLPrinter.addPageEpilog(buffer);
  57                 return buffer.toString();
  58         }
  59
  60         /*
  61          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  62          */
  63         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  64
  65                 if (getEditor() == null)
  66                         return null;
  67
  68                 IDocumentProvider provider = WebUI.getDefault()
  69                                 .getCompilationUnitDocumentProvider();
  70                 IAnnotationModel model = provider.getAnnotationModel(getEditor()
  71                                 .getEditorInput());
  72                 String message = null;
  73                 if (model != null) {
  74                         Iterator e = new JavaAnnotationIterator(model, true);
  75                         int layer = -1;
  76
  77                         while (e.hasNext()) {
  78                                 Annotation a = (Annotation) e.next();
  79
  80                                 AnnotationPreference preference = getAnnotationPreference(a);
  81                                 if (preference == null
  82                                                 || !(fStore.getBoolean(preference
  83                                                                 .getTextPreferenceKey()) || (preference
  84                                                                 .getHighlightPreferenceKey() != null && fStore
  85                                                                 .getBoolean(preference
  86                                                                                 .getHighlightPreferenceKey()))))
  87                                         continue;
  88
  89                                 Position p = model.getPosition(a);
  90
  91                                 int l = fAnnotationAccess.getLayer(a);
  92
  93                                 if (l > layer
  94                                                 && p != null
  95                                                 && p.overlapsWith(hoverRegion.getOffset(), hoverRegion
  96                                                                 .getLength())) {
  97                                         String msg = a.getText();
  98                                         if (msg != null && msg.trim().length() > 0) {
  99                                                 message = msg;
 100                                                 layer = l;
 101                                         }
 102                                 }
 103                         }
 104                         if (layer > -1)
 105                                 return formatMessage(message);
 106                 }
 107                 // Added as long as the above doesn't work
 108                 if (fPHPTextHover != null) {
 109                         message = fPHPTextHover.getHoverInfo(textViewer, hoverRegion);
 110                         if (message != null) {
 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                         if (editor != null) {
 124                                 IEditorInput editorInput = editor.getEditorInput();
 125                                 if (editorInput instanceof IFileEditorInput) {
 126                                         try {
 127                                                 IFile f = ((IFileEditorInput) editorInput).getFile();
 128                                                 fPHPTextHover = new PHPTextHover(f.getProject());
 129                                                 return;
 130                                         } catch (NullPointerException e) {
 131                                                 // this exception occurs, if getTextHover is called by
 132                                                 // preference pages !
 133                                         }
 134                                 }
 135                         }
 136                         fPHPTextHover = new PHPTextHover(null);
 137                 } else {
 138                         super.setEditor(null);
 139                 }
 140         }
 141
 142         /**
 143          * Returns the annotation preference for the given annotation.
 144          *
 145          * @param annotation
 146          *            the annotation
 147          * @return the annotation preference or <code>null</code> if none
 148          */
 149         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 150
 151                 if (annotation.isMarkedDeleted())
 152                         return null;
 153                 return EditorsUI.getAnnotationPreferenceLookup()
 154                                 .getAnnotationPreference(annotation);
 155         }
 156
 157         static boolean isJavaProblemHover(String id) {
 158                 return PreferenceConstants.ID_PROBLEM_HOVER.equals(id);
 159         }
 160 }