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