| /******************************************************************************* |
| * Copyright (c) 2005, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Wind River Systems - added saving and restoring properties |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.ui.viewers.model.provisional; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Map.Entry; |
| |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.jface.util.SafeRunnable; |
| import org.eclipse.ui.IElementFactory; |
| import org.eclipse.ui.IMemento; |
| import org.eclipse.ui.IPersistableElement; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * Presentation context. |
| * <p> |
| * Clients may instantiate and subclass this class. |
| * </p> |
| * @since 3.2 |
| */ |
| public class PresentationContext implements IPresentationContext { |
| |
| private static final String PRESENTATION_CONTEXT_PROPERTIES = "PRESENTATION_CONTEXT_PROPERTIES"; //$NON-NLS-1$ |
| private static final String BOOLEAN = "BOOLEAN"; //$NON-NLS-1$ |
| private static final String STRING = "STRING"; //$NON-NLS-1$ |
| private static final String INTEGER = "INTEGER"; //$NON-NLS-1$ |
| private static final String PERSISTABLE = "PERSISTABLE"; //$NON-NLS-1$ |
| |
| private String fId; |
| private ListenerList fListeners = new ListenerList(); |
| private Map fProperties = new HashMap(); |
| |
| /** |
| * Constructs a presentation context for the given id. |
| * |
| * @param id presentation context id |
| */ |
| public PresentationContext(String id) { |
| fId = id; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#getColumns() |
| */ |
| public String[] getColumns() { |
| return (String[]) getProperty(IPresentationContext.PROPERTY_COLUMNS); |
| } |
| |
| /** |
| * Fires a property change event to all registered listeners |
| * |
| * @param property property name |
| * @param oldValue old value or <code>null</code> |
| * @param newValue new value or <code>null</code> |
| */ |
| protected void firePropertyChange(String property, Object oldValue, Object newValue) { |
| if (!fListeners.isEmpty()) { |
| final PropertyChangeEvent event = new PropertyChangeEvent(this, property, oldValue, newValue); |
| Object[] listeners = fListeners.getListeners(); |
| for (int i = 0; i < listeners.length; i++) { |
| final IPropertyChangeListener listener = (IPropertyChangeListener) listeners[i]; |
| SafeRunner.run(new SafeRunnable() { |
| public void run() throws Exception { |
| listener.propertyChange(event); |
| } |
| }); |
| } |
| } |
| } |
| |
| /** |
| * Sets the visible column ids. |
| * |
| * @param ids column identifiers |
| */ |
| public void setColumns(String[] ids) { |
| setProperty(IPresentationContext.PROPERTY_COLUMNS, ids); |
| } |
| |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext#dispose() |
| */ |
| public void dispose() { |
| fListeners.clear(); |
| fProperties.clear(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#addPropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener) |
| */ |
| public void addPropertyChangeListener(IPropertyChangeListener listener) { |
| fListeners.add(listener); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#removePropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener) |
| */ |
| public void removePropertyChangeListener(IPropertyChangeListener listener) { |
| fListeners.remove(listener); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#getId() |
| */ |
| public String getId() { |
| return fId; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#getProperty(java.lang.String) |
| */ |
| public Object getProperty(String property) { |
| synchronized (fProperties) { |
| return fProperties.get(property); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext#setProperty(java.lang.String, java.lang.Object) |
| */ |
| public void setProperty(String property, Object value) { |
| synchronized (fProperties) { |
| Object oldValue = fProperties.get(property); |
| if (!isEqual(oldValue, value)) { |
| fProperties.put(property, value); |
| firePropertyChange(property, oldValue, value); |
| } |
| } |
| } |
| |
| /** |
| * Restores the presentation context properties from the given memento. |
| * @param memento Memento to restore from. |
| */ |
| public void initProperties(IMemento memento) { |
| IMemento presentationMemento = null; |
| |
| IMemento[] mementos = memento.getChildren(PRESENTATION_CONTEXT_PROPERTIES); |
| for (int i = 0; i < mementos.length; i++) { |
| if (getId().equals(mementos[i].getID())) { |
| presentationMemento = mementos[i]; |
| break; |
| } |
| } |
| |
| if (presentationMemento != null) { |
| IMemento[] stringProperties = presentationMemento.getChildren(STRING); |
| for (int i = 0; i < stringProperties.length; i++) { |
| fProperties.put(stringProperties[i].getID(), stringProperties[i].getString(STRING)); |
| } |
| |
| IMemento[] integerMementos = presentationMemento.getChildren(INTEGER); |
| for (int i = 0; i < integerMementos.length; i++) { |
| fProperties.put(integerMementos[i].getID(), integerMementos[i].getInteger(INTEGER)); |
| } |
| |
| IMemento[] booleanMementos = presentationMemento.getChildren(BOOLEAN); |
| for (int i = 0; i < booleanMementos.length; i++) { |
| fProperties.put(booleanMementos[i].getID(), booleanMementos[i].getBoolean(BOOLEAN)); |
| } |
| |
| IMemento[] persistableMementos = presentationMemento.getChildren(PERSISTABLE); |
| for (int i = 0; i < persistableMementos.length; i++) { |
| String factoryID = persistableMementos[i].getString(PERSISTABLE); |
| if (factoryID != null) { |
| IElementFactory factory = PlatformUI.getWorkbench().getElementFactory(factoryID); |
| if (factory != null) { |
| Object element = factory.createElement(persistableMementos[i]); |
| if (element != null) { |
| fProperties.put(persistableMementos[i].getID(), element); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Saves the current presentation context properties to the given memento. |
| * @param memento Memento to save to. |
| */ |
| public void saveProperites(IMemento memento) { |
| if (fProperties.size() == 0) { |
| return; |
| } |
| |
| IMemento properties = memento.createChild(PRESENTATION_CONTEXT_PROPERTIES, getId()); |
| Iterator iterator = fProperties.entrySet().iterator(); |
| while (iterator.hasNext()) { |
| Map.Entry entry = (Entry) iterator.next(); |
| if (entry.getValue() instanceof String) { |
| IMemento value = properties.createChild(STRING, (String)entry.getKey()); |
| value.putString(STRING, (String)entry.getValue()); |
| } else if (entry.getValue() instanceof Integer) { |
| IMemento value = properties.createChild(INTEGER, (String)entry.getKey()); |
| value.putInteger(INTEGER, ((Integer)entry.getValue()).intValue()); |
| } else if (entry.getValue() instanceof Boolean) { |
| IMemento value = properties.createChild(BOOLEAN, (String)entry.getKey()); |
| value.putBoolean(BOOLEAN, ((Boolean)entry.getValue()).booleanValue()); |
| } else if (entry.getValue() instanceof IPersistableElement) { |
| IPersistableElement persistable = (IPersistableElement)entry.getValue(); |
| IMemento value = properties.createChild(PERSISTABLE, (String)entry.getKey()); |
| value.putString(PERSISTABLE, persistable.getFactoryId()); |
| persistable.saveState(value); |
| } |
| } |
| } |
| |
| private boolean isEqual(Object a, Object b) { |
| if (a == null) { |
| return b == null; |
| } |
| return a.equals(b); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext#getProperties() |
| */ |
| public String[] getProperties() { |
| synchronized (fProperties) { |
| Set keys = fProperties.keySet(); |
| return (String[]) keys.toArray(new String[keys.size()]); |
| } |
| } |
| |
| |
| } |
