net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/JavaAnnotationHover.java

   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 package net.sourceforge.phpdt.internal.ui.text;
  12
  13 import java.util.ArrayList;
  14 import java.util.HashMap;
  15 import java.util.Iterator;
  16 import java.util.List;
  17 import java.util.Map;
  18
  19 import net.sourceforge.phpdt.internal.corext.Assert;
  20 import net.sourceforge.phpdt.internal.ui.PHPUIMessages;
  21 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  22
  23 import org.eclipse.jface.preference.IPreferenceStore;
  24 import org.eclipse.jface.text.BadLocationException;
  25 import org.eclipse.jface.text.IDocument;
  26 import org.eclipse.jface.text.Position;
  27 import org.eclipse.jface.text.source.Annotation;
  28 import org.eclipse.jface.text.source.IAnnotationHover;
  29 import org.eclipse.jface.text.source.IAnnotationModel;
  30 import org.eclipse.jface.text.source.ISourceViewer;
  31 import org.eclipse.ui.editors.text.EditorsUI;
  32 import org.eclipse.ui.texteditor.AnnotationPreference;
  33
  34 /**
  35  * Determines all markers for the given line and collects, concatenates, and
  36  * formates their messages.
  37  */
  38 public class JavaAnnotationHover implements IAnnotationHover {
  39         private static class JavaAnnotationHoverType {
  40         }
  41
  42         public static final JavaAnnotationHoverType OVERVIEW_RULER_HOVER = new JavaAnnotationHoverType();
  43
  44         public static final JavaAnnotationHoverType TEXT_RULER_HOVER = new JavaAnnotationHoverType();
  45
  46         public static final JavaAnnotationHoverType VERTICAL_RULER_HOVER = new JavaAnnotationHoverType();
  47
  48         // private IPreferenceStore fStore =
  49         // PHPeclipsePlugin.getDefault().getPreferenceStore();
  50         private IPreferenceStore fStore = EditorsUI.getPreferenceStore();
  51
  52         private JavaAnnotationHoverType fType;
  53
  54         public JavaAnnotationHover(JavaAnnotationHoverType type) {
  55                 Assert.isTrue(OVERVIEW_RULER_HOVER.equals(type)
  56                                 || TEXT_RULER_HOVER.equals(type)
  57                                 || VERTICAL_RULER_HOVER.equals(type));
  58                 fType = type;
  59         }
  60
  61         /**
  62          * Returns the distance to the ruler line.
  63          */
  64         protected int compareRulerLine(Position position, IDocument document,
  65                         int line) {
  66
  67                 if (position.getOffset() > -1 && position.getLength() > -1) {
  68                         try {
  69                                 int javaAnnotationLine = document.getLineOfOffset(position
  70                                                 .getOffset());
  71                                 if (line == javaAnnotationLine)
  72                                         return 1;
  73                                 if (javaAnnotationLine <= line
  74                                                 && line <= document.getLineOfOffset(position
  75                                                                 .getOffset()
  76                                                                 + position.getLength()))
  77                                         return 2;
  78                         } catch (BadLocationException x) {
  79                         }
  80                 }
  81
  82                 return 0;
  83         }
  84
  85         /**
  86          * Selects a set of markers from the two lists. By default, it just returns
  87          * the set of exact matches.
  88          */
  89         protected List select(List exactMatch, List including) {
  90                 return exactMatch;
  91         }
  92
  93         /**
  94          * Returns one marker which includes the ruler's line of activity.
  95          */
  96         protected List getJavaAnnotationsForLine(ISourceViewer viewer, int line) {
  97
  98                 IDocument document = viewer.getDocument();
  99                 IAnnotationModel model = viewer.getAnnotationModel();
 100
 101                 if (model == null)
 102                         return null;
 103
 104                 List exact = new ArrayList();
 105                 List including = new ArrayList();
 106
 107                 Iterator e = model.getAnnotationIterator();
 108                 HashMap messagesAtPosition = new HashMap();
 109                 while (e.hasNext()) {
 110                         Annotation annotation = (Annotation) e.next();
 111
 112                         if (annotation.getText() == null)
 113                                 continue;
 114
 115                         Position position = model.getPosition(annotation);
 116                         if (position == null)
 117                                 continue;
 118
 119                         AnnotationPreference preference = getAnnotationPreference(annotation);
 120                         if (preference == null)
 121                                 continue;
 122
 123                         if (OVERVIEW_RULER_HOVER.equals(fType)) {
 124                                 String key = preference.getOverviewRulerPreferenceKey();
 125                                 if (key == null || !fStore.getBoolean(key))
 126                                         continue;
 127                         } else if (TEXT_RULER_HOVER.equals(fType)) {
 128                                 String key = preference.getTextPreferenceKey();
 129                                 if (key != null) {
 130                                         if (!fStore.getBoolean(key))
 131                                                 continue;
 132                                 } else {
 133                                         key = preference.getHighlightPreferenceKey();
 134                                         if (key == null || !fStore.getBoolean(key))
 135                                                 continue;
 136                                 }
 137                         } else if (VERTICAL_RULER_HOVER.equals(fType)) {
 138                                 String key = preference.getVerticalRulerPreferenceKey();
 139                                 // backward compatibility
 140                                 if (key != null && !fStore.getBoolean(key))
 141                                         continue;
 142                         }
 143
 144                         if (isDuplicateJavaAnnotation(messagesAtPosition, position,
 145                                         annotation.getText()))
 146                                 continue;
 147
 148                         switch (compareRulerLine(position, document, line)) {
 149                         case 1:
 150                                 exact.add(annotation);
 151                                 break;
 152                         case 2:
 153                                 including.add(annotation);
 154                                 break;
 155                         }
 156                 }
 157
 158                 return select(exact, including);
 159         }
 160
 161         // /**
 162         // * Returns one marker which includes the ruler's line of activity.
 163         // */
 164         // protected List getJavaAnnotationsForLine(ISourceViewer viewer, int line)
 165         // {
 166         //
 167         // IDocument document= viewer.getDocument();
 168         // IAnnotationModel model= viewer.getAnnotationModel();
 169         //
 170         // if (model == null)
 171         // return null;
 172         //
 173         // List exact= new ArrayList();
 174         // List including= new ArrayList();
 175         //
 176         // Iterator e= model.getAnnotationIterator();
 177         // HashMap messagesAtPosition= new HashMap();
 178         // while (e.hasNext()) {
 179         // Object o= e.next();
 180         // if (o instanceof IJavaAnnotation) {
 181         // IJavaAnnotation a= (IJavaAnnotation)o;
 182         // if (!a.hasOverlay()) {
 183         // Position position= model.getPosition((Annotation)a);
 184         // if (position == null)
 185         // continue;
 186         //
 187         // if (isDuplicateJavaAnnotation(messagesAtPosition, position,
 188         // a.getMessage()))
 189         // continue;
 190         //
 191         // switch (compareRulerLine(position, document, line)) {
 192         // case 1:
 193         // exact.add(a);
 194         // break;
 195         // case 2:
 196         // including.add(a);
 197         // break;
 198         // }
 199         // }
 200         // }
 201         // }
 202         //
 203         // return select(exact, including);
 204         // }
 205
 206         private boolean isDuplicateJavaAnnotation(Map messagesAtPosition,
 207                         Position position, String message) {
 208                 if (messagesAtPosition.containsKey(position)) {
 209                         Object value = messagesAtPosition.get(position);
 210                         if (message.equals(value))
 211                                 return true;
 212
 213                         if (value instanceof List) {
 214                                 List messages = (List) value;
 215                                 if (messages.contains(message))
 216                                         return true;
 217                                 else
 218                                         messages.add(message);
 219                         } else {
 220                                 ArrayList messages = new ArrayList();
 221                                 messages.add(value);
 222                                 messages.add(message);
 223                                 messagesAtPosition.put(position, messages);
 224                         }
 225                 } else
 226                         messagesAtPosition.put(position, message);
 227                 return false;
 228         }
 229
 230         /*
 231          * @see IVerticalRulerHover#getHoverInfo(ISourceViewer, int)
 232          */
 233         public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
 234                 List javaAnnotations = getJavaAnnotationsForLine(sourceViewer,
 235                                 lineNumber);
 236                 if (javaAnnotations != null) {
 237
 238                         if (javaAnnotations.size() == 1) {
 239
 240                                 // optimization
 241                                 Annotation annotation = (Annotation) javaAnnotations.get(0);
 242                                 String message = annotation.getText();
 243                                 if (message != null && message.trim().length() > 0)
 244                                         return formatSingleMessage(message);
 245
 246                         } else {
 247
 248                                 List messages = new ArrayList();
 249
 250                                 Iterator e = javaAnnotations.iterator();
 251                                 while (e.hasNext()) {
 252                                         Annotation annotation = (Annotation) e.next();
 253                                         String message = annotation.getText();
 254                                         if (message != null && message.trim().length() > 0)
 255                                                 messages.add(message.trim());
 256                                 }
 257
 258                                 if (messages.size() == 1)
 259                                         return formatSingleMessage((String) messages.get(0));
 260
 261                                 if (messages.size() > 1)
 262                                         return formatMultipleMessages(messages);
 263                         }
 264                 }
 265
 266                 return null;
 267         }
 268
 269         /*
 270          * @see IVerticalRulerHover#getHoverInfo(ISourceViewer, int)
 271          */
 272         // public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
 273         // List javaAnnotations= getJavaAnnotationsForLine(sourceViewer,
 274         // lineNumber);
 275         // if (javaAnnotations != null) {
 276         //
 277         // if (javaAnnotations.size() == 1) {
 278         //
 279         // // optimization
 280         // IJavaAnnotation javaAnnotation= (IJavaAnnotation) javaAnnotations.get(0);
 281         // String message= javaAnnotation.getMessage();
 282         // if (message != null && message.trim().length() > 0)
 283         // return formatSingleMessage(message);
 284         //
 285         // } else {
 286         //
 287         // List messages= new ArrayList();
 288         //
 289         // Iterator e= javaAnnotations.iterator();
 290         // while (e.hasNext()) {
 291         // IJavaAnnotation javaAnnotation= (IJavaAnnotation) e.next();
 292         // String message= javaAnnotation.getMessage();
 293         // if (message != null && message.trim().length() > 0)
 294         // messages.add(message.trim());
 295         // }
 296         //
 297         // if (messages.size() == 1)
 298         // return formatSingleMessage((String) messages.get(0));
 299         //
 300         // if (messages.size() > 1)
 301         // return formatMultipleMessages(messages);
 302         // }
 303         // }
 304         //
 305         // return null;
 306         // }
 307         /*
 308          * Formats a message as HTML text.
 309          */
 310         private String formatSingleMessage(String message) {
 311                 StringBuffer buffer = new StringBuffer();
 312                 HTMLPrinter.addPageProlog(buffer);
 313                 HTMLPrinter.addParagraph(buffer, HTMLPrinter
 314                                 .convertToHTMLContent(message));
 315                 HTMLPrinter.addPageEpilog(buffer);
 316                 return buffer.toString();
 317         }
 318
 319         /*
 320          * Formats several message as HTML text.
 321          */
 322         private String formatMultipleMessages(List messages) {
 323                 StringBuffer buffer = new StringBuffer();
 324                 HTMLPrinter.addPageProlog(buffer);
 325                 HTMLPrinter
 326                                 .addParagraph(
 327                                                 buffer,
 328                                                 HTMLPrinter
 329                                                                 .convertToHTMLContent(PHPUIMessages
 330                                                                                 .getString("JavaAnnotationHover.multipleMarkersAtThisLine"))); //$NON-NLS-1$
 331
 332                 HTMLPrinter.startBulletList(buffer);
 333                 Iterator e = messages.iterator();
 334                 while (e.hasNext())
 335                         HTMLPrinter.addBullet(buffer, HTMLPrinter
 336                                         .convertToHTMLContent((String) e.next()));
 337                 HTMLPrinter.endBulletList(buffer);
 338
 339                 HTMLPrinter.addPageEpilog(buffer);
 340                 return buffer.toString();
 341         }
 342
 343         /**
 344          * Returns the annotation preference for the given annotation.
 345          *
 346          * @param annotation
 347          *            the annotation
 348          * @return the annotation preference or <code>null</code> if none
 349          */
 350         private AnnotationPreference getAnnotationPreference(Annotation annotation) {
 351                 return EditorsUI.getAnnotationPreferenceLookup()
 352                                 .getAnnotationPreference(annotation);
 353         }
 354 }