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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 package net.sourceforge.phpdt.internal.ui.viewsupport;
  12
  13 import net.sourceforge.phpdt.ui.PreferenceConstants;
  14
  15 import org.eclipse.jface.preference.IPreferenceStore;
  16 import org.eclipse.jface.util.IPropertyChangeListener;
  17 import org.eclipse.jface.util.PropertyChangeEvent;
  18 import org.eclipse.jface.viewers.LabelProviderChangedEvent;
  19
  20 /**
  21  * JavaUILabelProvider that respects settings from the Appearance preference
  22  * page. Triggers a viewer update when a preference changes.
  23  */
  24 public class AppearanceAwareLabelProvider extends JavaUILabelProvider implements
  25                 IPropertyChangeListener {
  26
  27         public final static int DEFAULT_TEXTFLAGS = JavaElementLabels.ROOT_VARIABLE
  28                         | JavaElementLabels.M_PARAMETER_TYPES
  29                         | JavaElementLabels.M_APP_RETURNTYPE
  30                         | JavaElementLabels.REFERENCED_ROOT_POST_QUALIFIED;
  31
  32         public final static int DEFAULT_IMAGEFLAGS = JavaElementImageProvider.OVERLAY_ICONS;
  33
  34         private int fTextFlagMask;
  35
  36         private int fImageFlagMask;
  37
  38         /**
  39          * Constructor for AppearanceAwareLabelProvider.
  40          */
  41         public AppearanceAwareLabelProvider(int textFlags, int imageFlags) {
  42                 super(textFlags, imageFlags);
  43                 initMasks();
  44                 PreferenceConstants.getPreferenceStore()
  45                                 .addPropertyChangeListener(this);
  46         }
  47
  48         /**
  49          * Creates a labelProvider with DEFAULT_TEXTFLAGS and DEFAULT_IMAGEFLAGS
  50          */
  51         public AppearanceAwareLabelProvider() {
  52                 this(DEFAULT_TEXTFLAGS, DEFAULT_IMAGEFLAGS);
  53         }
  54
  55         private void initMasks() {
  56                 IPreferenceStore store = PreferenceConstants.getPreferenceStore();
  57                 fTextFlagMask = -1;
  58                 if (!store.getBoolean(PreferenceConstants.APPEARANCE_METHOD_RETURNTYPE)) {
  59                         fTextFlagMask ^= JavaElementLabels.M_APP_RETURNTYPE;
  60                 }
  61                 if (!store
  62                                 .getBoolean(PreferenceConstants.APPEARANCE_COMPRESS_PACKAGE_NAMES)) {
  63                         fTextFlagMask ^= JavaElementLabels.P_COMPRESSED;
  64                 }
  65
  66                 fImageFlagMask = -1;
  67         }
  68
  69         /*
  70          * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
  71          */
  72         public void propertyChange(PropertyChangeEvent event) {
  73                 String property = event.getProperty();
  74                 if (property.equals(PreferenceConstants.APPEARANCE_METHOD_RETURNTYPE)
  75                                 || property
  76                                                 .equals(PreferenceConstants.APPEARANCE_PKG_NAME_PATTERN_FOR_PKG_VIEW)
  77                                 || property
  78                                                 .equals(PreferenceConstants.APPEARANCE_COMPRESS_PACKAGE_NAMES)) {
  79                         initMasks();
  80                         LabelProviderChangedEvent lpEvent = new LabelProviderChangedEvent(
  81                                         this, null); // refresh all
  82                         fireLabelProviderChanged(lpEvent);
  83                 }
  84         }
  85
  86         /*
  87          * @see IBaseLabelProvider#dispose()
  88          */
  89         public void dispose() {
  90                 PreferenceConstants.getPreferenceStore().removePropertyChangeListener(
  91                                 this);
  92                 super.dispose();
  93         }
  94
  95         /*
  96          * @see JavaUILabelProvider#evaluateImageFlags()
  97          */
  98         protected int evaluateImageFlags(Object element) {
  99                 return getImageFlags() & fImageFlagMask;
 100         }
 101
 102         /*
 103          * @see JavaUILabelProvider#evaluateTextFlags()
 104          */
 105         protected int evaluateTextFlags(Object element) {
 106                 return getTextFlags() & fTextFlagMask;
 107         }
 108
 109 }