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/******************************************************************************* |
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* Copyright (c) 2006 IBM Corporation and others. |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* IBM Corporation - initial API and implementation |
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*******************************************************************************/ |
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package org.eclipse.jdt.internal.debug.ui.variables; |
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|
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.ListIterator; |
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import java.util.Map; |
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import java.util.Map.Entry; |
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import org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext; |
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import org.eclipse.debug.ui.IDebugUIConstants; |
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import org.eclipse.jdt.debug.ui.IJavaDebugUIConstants; |
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import org.eclipse.jdt.internal.debug.ui.IJDIPreferencesConstants; |
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import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin; |
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import org.eclipse.jface.preference.IPreferenceStore; |
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import org.eclipse.jface.util.IPropertyChangeListener; |
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import org.eclipse.jface.util.PropertyChangeEvent; |
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import org.eclipse.ui.IWorkbenchPart; |
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|
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/** |
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* Filters debug elements based on presentation context. Used with content adapters. |
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* |
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* @since 3.2.1 |
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*/ |
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public class JavaDebugElementFilters implements IPropertyChangeListener { |
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|
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/** |
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* Map of part identifiers to active <ElementFilters> for that part. |
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*/ |
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private Map fFilters = new HashMap(); |
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|
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/** |
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* Map of parts and arrays of associated preferences |
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*/ |
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private Map fPartsAndPreferences = new HashMap(); |
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|
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// filters |
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private ElementFilter fStaticVariablesFilter = new StaticVariablesFilter(); |
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private ElementFilter fConstantsFilter = new ConstantsFilter(); |
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private ElementFilter fNullEntriesFilter = new NullArrayEntriesFilter(); |
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|
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/** |
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* Singleton filter manager. |
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*/ |
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private static JavaDebugElementFilters fgDefault = null; |
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|
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public synchronized static JavaDebugElementFilters getDefault() { |
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if (fgDefault == null) { |
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fgDefault = new JavaDebugElementFilters(); |
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} |
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return fgDefault; |
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} |
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|
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private JavaDebugElementFilters() { |
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init(); |
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} |
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|
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private void init() { |
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IPreferenceStore preferenceStore = JDIDebugUIPlugin.getDefault().getPreferenceStore(); |
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preferenceStore.addPropertyChangeListener(this); |
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// initialize preferences associated with each part |
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fPartsAndPreferences.put(IDebugUIConstants.ID_VARIABLE_VIEW, |
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new String[]{ |
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IJDIPreferencesConstants.PREF_SHOW_CONSTANTS, |
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IJDIPreferencesConstants.PREF_SHOW_STATIC_VARIALBES, |
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IJDIPreferencesConstants.PREF_SHOW_NULL_ARRAY_ENTRIES}); |
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fPartsAndPreferences.put(IDebugUIConstants.ID_EXPRESSION_VIEW, |
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new String[]{ |
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IJDIPreferencesConstants.PREF_SHOW_CONSTANTS, |
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IJDIPreferencesConstants.PREF_SHOW_STATIC_VARIALBES, |
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IJDIPreferencesConstants.PREF_SHOW_NULL_ARRAY_ENTRIES}); |
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// initialize filters based on preference settings |
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Iterator entries = fPartsAndPreferences.entrySet().iterator(); |
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while (entries.hasNext()) { |
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Entry entry = (Entry) entries.next(); |
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String partId = (String) entry.getKey(); |
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String[] prefs = (String[]) entry.getValue(); |
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for (int i = 0; i < prefs.length; i++) { |
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String pref = partId + "." + prefs[i]; //$NON-NLS-1$ |
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PropertyChangeEvent event = new PropertyChangeEvent(preferenceStore, pref, |
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null, new Boolean(preferenceStore.getBoolean(pref))); |
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propertyChange(event); |
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} |
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} |
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} |
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/* (non-Javadoc) |
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* @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent) |
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*/ |
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public void propertyChange(PropertyChangeEvent event) { |
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String property = event.getProperty(); |
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if (property.endsWith(IJDIPreferencesConstants.PREF_SHOW_CONSTANTS)) { |
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updateFilter(getPartId(property, IJDIPreferencesConstants.PREF_SHOW_CONSTANTS), |
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fConstantsFilter, !getBooleanValue(event.getNewValue())); |
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} else if (property.endsWith(IJDIPreferencesConstants.PREF_SHOW_STATIC_VARIALBES)) { |
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updateFilter(getPartId(property, IJDIPreferencesConstants.PREF_SHOW_STATIC_VARIALBES), |
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fStaticVariablesFilter, !getBooleanValue(event.getNewValue())); |
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} else if (property.endsWith(IJDIPreferencesConstants.PREF_SHOW_NULL_ARRAY_ENTRIES)) { |
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updateFilter(getPartId(property, IJDIPreferencesConstants.PREF_SHOW_NULL_ARRAY_ENTRIES), |
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fNullEntriesFilter, !getBooleanValue(event.getNewValue())); |
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} |
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} |
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|
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/** |
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* Updates the specified filter for the specified part. |
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* |
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* @param partId part to update |
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* @param filter the filter to add or remove |
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* @param add whether to add the filter |
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*/ |
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private void updateFilter(String partId, ElementFilter filter, boolean add) { |
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List filters = (List) fFilters.get(partId); |
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if (add) { |
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if (filters == null) { |
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filters = new ArrayList(); |
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fFilters.put(partId, filters); |
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} |
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filters.add(filter); |
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} else { |
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if (filters != null) { |
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filters.remove(filter); |
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} |
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} |
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} |
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private boolean getBooleanValue(Object object) { |
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if (object instanceof Boolean) { |
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return ((Boolean)object).booleanValue(); |
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} |
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return false; |
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} |
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|
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/** |
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* Returns the part effected by the preference change. |
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* |
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* @param key |
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* @param pref |
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* @return part id |
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*/ |
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private String getPartId(String key, String pref) { |
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return key.substring(0, key.length() - pref.length() - 1); |
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} |
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|
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/** |
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* Filters the given element based on presentation context. |
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* |
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* @param parent parent element |
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* @param elements elements to filter |
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* @param context context in which the elements are displayed |
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* @return filtered elements |
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*/ |
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public Object[] filter(Object parent, Object[] elements, IPresentationContext context) { |
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IWorkbenchPart part = context.getPart(); |
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if (part != null) { |
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String id = part.getSite().getId(); |
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List list = (List) fFilters.get(id); |
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if (list != null && !list.isEmpty()) { |
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Iterator filters = list.iterator(); |
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List filteredElements = new ArrayList(elements.length); |
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for (int i = 0; i < elements.length; i++) { |
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filteredElements.add(elements[i]); |
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} |
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while (filters.hasNext()) { |
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ElementFilter filter = (ElementFilter) filters.next(); |
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ListIterator iterator = filteredElements.listIterator(); |
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while (iterator.hasNext()) { |
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if (filter.isFiltered(parent, iterator.next())) { |
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iterator.remove(); |
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} |
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} |
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} |
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return filteredElements.toArray(); |
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} |
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} |
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return elements; |
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} |
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} |
