bundles/org.eclipse.core.tools.resources/src/org/eclipse/core/tools/resources/ResourceChangeView.java - platform/eclipse.platform.resources - Git at Google

 /**********************************************************************
  * Copyright (c) 2002, 2018 Geoff Longman and others.
  *
  *   This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  * Geoff Longman - Initial API and implementation
  * IBM - Tightening integration with existing Platform
  **********************************************************************/
 package org.eclipse.core.tools.resources;

 import org.eclipse.jface.action.Action;

 import java.util.*;
 import org.eclipse.core.resources.*;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.tools.SpyView;
 import org.eclipse.jface.action.*;
 import org.eclipse.jface.viewers.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.*;

 /**
  * This spy view displays a tree-based representation of resource deltas from
  * resource change events.
  */
 public class ResourceChangeView extends SpyView implements IResourceChangeListener {
 	static class DeltaNode implements IAdaptable {
 		private ArrayList<DeltaNode> children;
 		private int deltaFlags = -1;
 		private int deltaKind = -1;
 		private DeltaNode parent = null;
 		private IPath path;
 		private IResource resource;

 		public DeltaNode() {
 			children = new ArrayList<>();
 		}

 		public DeltaNode(IResourceDelta delta) {
 			this();
 			populateFromDelta(delta);
 		}

 		public void addChild(DeltaNode child) {
 			children.add(child);
 			child.setParent(this);
 		}

 		@Override
 		@SuppressWarnings("unchecked")
 		public <T> T getAdapter(Class<T> key) {
 			if (key != IResource.class)
 				return null;
 			return (T) resource;
 		}

 		public DeltaNode[] getChildren() {
 			return children.toArray(new DeltaNode[children.size()]);
 		}

 		public int getDeltaFlags() {
 			return deltaFlags;
 		}

 		public int getDeltaKind() {
 			return deltaKind;
 		}

 		public DeltaNode getParent() {
 			return parent;
 		}

 		public IPath getPath() {
 			return path;
 		}

 		public IResource getResource() {
 			return resource;
 		}

 		public boolean hasChildren() {
 			return children.size() > 0;
 		}

 		public void populateFromDelta(IResourceDelta delta) {
 			deltaFlags = delta.getFlags();
 			deltaKind = delta.getKind();
 			path = delta.getFullPath();
 			resource = delta.getResource();
 			IResourceDelta[] deltaChildren = delta.getAffectedChildren();
 			for (int i = 0; i < deltaChildren.length; i++)
 				addChild(new DeltaNode(deltaChildren[i]));
 		}

 		public void removeChild(DeltaNode child) {
 			children.remove(child);
 			child.setParent(null);
 		}

 		public void setParent(DeltaNode parent) {
 			this.parent = parent;
 		}

 		@Override
 		public String toString() {
 			return resource.getName();
 		}
 	}

 	class FilterAction extends Action {
 		private int type;

 		public FilterAction(String text, int eventType) {
 			super(text);
 			type = eventType;
 		}

 		/**
 		 * @see org.eclipse.jface.action.IAction#run()
 		 */
 		@Override
 		public void run() {
 			typeFilter = type;
 			for (Action action : eventActions) {
 				action.setChecked(action.equals(this));
 			}
 		}
 	}

 	class FilterPhantoms extends Action {
 		public FilterPhantoms() {
 			super("Show Phantoms"); //$NON-NLS-1$
 		}

 		@Override
 		public void run() {
 			showPhantoms = !showPhantoms;
 			setChecked(showPhantoms);
 		}
 	}

 	static class ResourceEventNode extends DeltaNode {
 		private int eventType;

 		public ResourceEventNode(IResourceChangeEvent event) {
 			super(event.getDelta());
 			eventType = event.getType();
 		}

 		public int getEventType() {
 			return eventType;
 		}
 	}

 	class ViewContentProvider implements IStructuredContentProvider, ITreeContentProvider {
 		private DeltaNode invisibleRoot;

 		@Override
 		public void dispose() {
 			// do nothing
 		}

 		@Override
 		public Object[] getChildren(Object parent) {
 			return ((DeltaNode) parent).getChildren();
 		}

 		@Override
 		public Object[] getElements(Object parent) {

 			if (parent.equals(rootObject)) {
 				if (invisibleRoot == null) {
 					if (rootObject instanceof IResourceChangeEvent) {
 						initialize(rootObject);
 					} else {
 						initialize();
 					}
 				}
 				return getChildren(invisibleRoot);
 			}
 			return getChildren(parent);
 		}

 		@Override
 		public Object getParent(Object child) {
 			return ((DeltaNode) child).getParent();
 		}

 		@Override
 		public boolean hasChildren(Object parent) {
 			return ((DeltaNode) parent).hasChildren();
 		}

 		/*
 		 * We will set up a dummy model to initialize tree hierarchy.
 		 */
 		private void initialize() {
 			invisibleRoot = new DeltaNode();
 		}

 		private void initialize(Object input) {
 			if (!(input instanceof IResourceChangeEvent))
 				return;
 			IResourceChangeEvent evt = (IResourceChangeEvent) input;
 			ResourceEventNode root = new ResourceEventNode(evt);
 			invisibleRoot = new DeltaNode();
 			invisibleRoot.addChild(root);
 		}

 		@Override
 		public void inputChanged(Viewer v, Object oldInput, Object newInput) {
 			invisibleRoot = null;
 		}
 	}

 	class ViewLabelProvider extends LabelProvider {

 		private String getEventTypeAsString(int eventType) {
 			switch (eventType) {
 				case IResourceChangeEvent.POST_BUILD :
 					return "POST_BUILD"; //$NON-NLS-1$
 				case IResourceChangeEvent.POST_CHANGE :
 					return "POST_CHANGE"; //$NON-NLS-1$
 				case IResourceChangeEvent.PRE_BUILD :
 					return "PRE_BUILD"; //$NON-NLS-1$
 			}
 			return null;
 		}

 		/**
 		 * Return a string representation of the change flags found
 		 * within a resource change event.
 		 */
 		private String getFlagsAsString(int flags) {
 			StringBuilder buffer = new StringBuilder();
 			if ((IResourceDelta.ADDED & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("ADDED"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.ADDED_PHANTOM & flags) != 0 && showPhantoms) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("ADDED_PHANTOM"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.ALL_WITH_PHANTOMS & flags) != 0 && showPhantoms) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("ALL_WITH_PHANTOMS"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.CHANGED & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("CHANGED"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.CONTENT & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("CONTENT"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.DESCRIPTION & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("DESCRIPTION"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.MARKERS & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("MARKERS"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.MOVED_FROM & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("MOVED_FROM"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.MOVED_TO & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("MOVED_TO"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.NO_CHANGE & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("NO_CHANGE"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.OPEN & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("OPEN"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.REMOVED & flags) != 0) {
 				buffer.append("-");
 				buffer.append("REMOVED");
 			}
 			if ((IResourceDelta.REMOVED_PHANTOM & flags) != 0 && showPhantoms) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("REMOVED_PHANTOM"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.REPLACED & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("REPLACED"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.SYNC & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("SYNC"); //$NON-NLS-1$
 			}
 			if ((IResourceDelta.TYPE & flags) != 0) {
 				buffer.append("-"); //$NON-NLS-1$
 				buffer.append("TYPE"); //$NON-NLS-1$
 			}
 			return buffer.toString();
 		}

 		@Override
 		public Image getImage(Object obj) {
 			DeltaNode node = (DeltaNode) obj;
 			String imageKey;
 			switch (node.getResource().getType()) {
 				case IResource.ROOT :
 					imageKey = ISharedImages.IMG_OBJ_FOLDER;
 					break;
 				case IResource.PROJECT :
 					imageKey = org.eclipse.ui.ide.IDE.SharedImages.IMG_OBJ_PROJECT;
 					break;
 				case IResource.FOLDER :
 					imageKey = ISharedImages.IMG_OBJ_FOLDER;
 					break;
 				case IResource.FILE :
 				default :
 					imageKey = ISharedImages.IMG_OBJ_FILE;
 					break;
 			}
 			return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
 		}

 		private String getKindAsString(int kind) {
 			if (kind == -1)
 				return ""; //$NON-NLS-1$
 			return " kind(" + getFlagsAsString(kind) + ") "; //$NON-NLS-1$ //$NON-NLS-2$
 		}

 		@Override
 		public String getText(Object obj) {
 			StringBuilder buffer = new StringBuilder(obj.toString());
 			if (obj instanceof ResourceEventNode) {
 				buffer.append("Workspace Root - "); //$NON-NLS-1$
 				buffer.append(getEventTypeAsString(((ResourceEventNode) obj).getEventType()));
 			}
 			buffer.append(getKindAsString(((DeltaNode) obj).getDeltaKind()));
 			buffer.append(getFlagsAsString(((DeltaNode) obj).getDeltaFlags()));
 			return buffer.toString();
 		}
 	}

 	protected Set<Action> eventActions = new HashSet<>();
 	private Action PHANTOMS;
 	private Action POST_BUILD;

 	private Action POST_CHANGE;

 	private Action PRE_BUILD;

 	protected Object rootObject = ResourcesPlugin.getWorkspace();

 	protected boolean showPhantoms = false;

 	protected int typeFilter = IResourceChangeEvent.POST_CHANGE;

 	protected TreeViewer viewer;

 	/**
 	 * The constructor.
 	 */
 	public ResourceChangeView() {
 		super();
 	}

 	/**
 	 * This is a callback that will allow us
 	 * to create the viewer and initialize it.
 	 */
 	@Override
 	public void createPartControl(Composite parent) {
 		viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
 		viewer.setContentProvider(new ViewContentProvider());
 		viewer.setLabelProvider(new ViewLabelProvider());
 		viewer.setInput(rootObject);

 		initializeActions();

 		IActionBars bars = getViewSite().getActionBars();
 		IMenuManager menuMgr = bars.getMenuManager();
 		menuMgr.addMenuListener(this::fillPullDownBar);
 		fillPullDownBar(menuMgr);

 		// register for all types of events and then filter out the one that we
 		// want based on the action settings.
 		ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_BUILD | IResourceChangeEvent.POST_CHANGE | IResourceChangeEvent.PRE_BUILD);
 	}

 	/**
 	 * @see org.eclipse.ui.IWorkbenchPart#dispose()
 	 */
 	@Override
 	public void dispose() {
 		super.dispose();
 		ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
 	}

 	/*
 	 * The content provider class is responsible for
 	 * providing objects to the view. It can wrap
 	 * existing objects in adapters or simply return
 	 * objects as-is. These objects may be sensitive
 	 * to the current input of the view, or ignore
 	 * it and always show the same content
 	 * (like Task List, for example).
 	 */

 	protected void fillPullDownBar(IMenuManager manager) {
 		manager.removeAll();

 		for (Action action : eventActions)
 			manager.add(action);
 		manager.add(new Separator("phantoms")); //$NON-NLS-1$
 		manager.add(PHANTOMS);
 	}

 	private void initializeActions() {
 		// create the actions for the drop-down menu
 		POST_BUILD = new FilterAction("POST_BUILD", IResourceChangeEvent.POST_BUILD); //$NON-NLS-1$
 		POST_CHANGE = new FilterAction("POST_CHANGE", IResourceChangeEvent.POST_CHANGE); //$NON-NLS-1$
 		// default event type
 		POST_CHANGE.setChecked(true);
 		PRE_BUILD = new FilterAction("PRE_BUILD", IResourceChangeEvent.PRE_BUILD); //$NON-NLS-1$
 		eventActions.add(POST_BUILD);
 		eventActions.add(POST_CHANGE);
 		eventActions.add(PRE_BUILD);
 		PHANTOMS = new FilterPhantoms();
 	}

 	/**
 	 * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(IResourceChangeEvent)
 	 */
 	@Override
 	public void resourceChanged(IResourceChangeEvent event) {
 		if (event.getType() != typeFilter)
 			return;
 		setRoot(event);
 	}

 	private void setRoot(IResourceChangeEvent event) {
 		if (viewer == null)
 			return;
 		Display display = viewer.getControl().getDisplay();
 		if (display == null)
 			return;
 		rootObject = event;
 		display.asyncExec(() -> {
 			viewer.getControl().setRedraw(false);
 			viewer.setInput(ResourceChangeView.this.rootObject);
 			viewer.expandAll();
 			viewer.getControl().setRedraw(true);
 		});
 	}
 }
	/**********************************************************************
	* Copyright (c) 2002, 2018 Geoff Longman and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Geoff Longman - Initial API and implementation
	* IBM - Tightening integration with existing Platform
	**********************************************************************/
	package org.eclipse.core.tools.resources;

	import org.eclipse.jface.action.Action;

	import java.util.*;
	import org.eclipse.core.resources.*;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.tools.SpyView;
	import org.eclipse.jface.action.*;
	import org.eclipse.jface.viewers.*;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.ui.*;

	/**
	* This spy view displays a tree-based representation of resource deltas from
	* resource change events.
	*/
	public class ResourceChangeView extends SpyView implements IResourceChangeListener {
	static class DeltaNode implements IAdaptable {
	private ArrayList<DeltaNode> children;
	private int deltaFlags = -1;
	private int deltaKind = -1;
	private DeltaNode parent = null;
	private IPath path;
	private IResource resource;

	public DeltaNode() {
	children = new ArrayList<>();
	}

	public DeltaNode(IResourceDelta delta) {
	this();
	populateFromDelta(delta);
	}

	public void addChild(DeltaNode child) {
	children.add(child);
	child.setParent(this);
	}

	@Override
	@SuppressWarnings("unchecked")
	public <T> T getAdapter(Class<T> key) {
	if (key != IResource.class)
	return null;
	return (T) resource;
	}

	public DeltaNode[] getChildren() {
	return children.toArray(new DeltaNode[children.size()]);
	}

	public int getDeltaFlags() {
	return deltaFlags;
	}

	public int getDeltaKind() {
	return deltaKind;
	}

	public DeltaNode getParent() {
	return parent;
	}

	public IPath getPath() {
	return path;
	}

	public IResource getResource() {
	return resource;
	}

	public boolean hasChildren() {
	return children.size() > 0;
	}

	public void populateFromDelta(IResourceDelta delta) {
	deltaFlags = delta.getFlags();
	deltaKind = delta.getKind();
	path = delta.getFullPath();
	resource = delta.getResource();
	IResourceDelta[] deltaChildren = delta.getAffectedChildren();
	for (int i = 0; i < deltaChildren.length; i++)
	addChild(new DeltaNode(deltaChildren[i]));
	}

	public void removeChild(DeltaNode child) {
	children.remove(child);
	child.setParent(null);
	}

	public void setParent(DeltaNode parent) {
	this.parent = parent;
	}

	@Override
	public String toString() {
	return resource.getName();
	}
	}

	class FilterAction extends Action {
	private int type;

	public FilterAction(String text, int eventType) {
	super(text);
	type = eventType;
	}

	/**
	* @see org.eclipse.jface.action.IAction#run()
	*/
	@Override
	public void run() {
	typeFilter = type;
	for (Action action : eventActions) {
	action.setChecked(action.equals(this));
	}
	}
	}

	class FilterPhantoms extends Action {
	public FilterPhantoms() {
	super("Show Phantoms"); //$NON-NLS-1$
	}

	@Override
	public void run() {
	showPhantoms = !showPhantoms;
	setChecked(showPhantoms);
	}
	}

	static class ResourceEventNode extends DeltaNode {
	private int eventType;

	public ResourceEventNode(IResourceChangeEvent event) {
	super(event.getDelta());
	eventType = event.getType();
	}

	public int getEventType() {
	return eventType;
	}
	}

	class ViewContentProvider implements IStructuredContentProvider, ITreeContentProvider {
	private DeltaNode invisibleRoot;

	@Override
	public void dispose() {
	// do nothing
	}

	@Override
	public Object[] getChildren(Object parent) {
	return ((DeltaNode) parent).getChildren();
	}

	@Override
	public Object[] getElements(Object parent) {

	if (parent.equals(rootObject)) {
	if (invisibleRoot == null) {
	if (rootObject instanceof IResourceChangeEvent) {
	initialize(rootObject);
	} else {
	initialize();
	}
	}
	return getChildren(invisibleRoot);
	}
	return getChildren(parent);
	}

	@Override
	public Object getParent(Object child) {
	return ((DeltaNode) child).getParent();
	}

	@Override
	public boolean hasChildren(Object parent) {
	return ((DeltaNode) parent).hasChildren();
	}

	/*
	* We will set up a dummy model to initialize tree hierarchy.
	*/
	private void initialize() {
	invisibleRoot = new DeltaNode();
	}

	private void initialize(Object input) {
	if (!(input instanceof IResourceChangeEvent))
	return;
	IResourceChangeEvent evt = (IResourceChangeEvent) input;
	ResourceEventNode root = new ResourceEventNode(evt);
	invisibleRoot = new DeltaNode();
	invisibleRoot.addChild(root);
	}

	@Override
	public void inputChanged(Viewer v, Object oldInput, Object newInput) {
	invisibleRoot = null;
	}
	}

	class ViewLabelProvider extends LabelProvider {

	private String getEventTypeAsString(int eventType) {
	switch (eventType) {
	case IResourceChangeEvent.POST_BUILD :
	return "POST_BUILD"; //$NON-NLS-1$
	case IResourceChangeEvent.POST_CHANGE :
	return "POST_CHANGE"; //$NON-NLS-1$
	case IResourceChangeEvent.PRE_BUILD :
	return "PRE_BUILD"; //$NON-NLS-1$
	}
	return null;
	}

	/**
	* Return a string representation of the change flags found
	* within a resource change event.
	*/
	private String getFlagsAsString(int flags) {
	StringBuilder buffer = new StringBuilder();
	if ((IResourceDelta.ADDED & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("ADDED"); //$NON-NLS-1$
	}
	if ((IResourceDelta.ADDED_PHANTOM & flags) != 0 && showPhantoms) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("ADDED_PHANTOM"); //$NON-NLS-1$
	}
	if ((IResourceDelta.ALL_WITH_PHANTOMS & flags) != 0 && showPhantoms) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("ALL_WITH_PHANTOMS"); //$NON-NLS-1$
	}
	if ((IResourceDelta.CHANGED & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("CHANGED"); //$NON-NLS-1$
	}
	if ((IResourceDelta.CONTENT & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("CONTENT"); //$NON-NLS-1$
	}
	if ((IResourceDelta.DESCRIPTION & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("DESCRIPTION"); //$NON-NLS-1$
	}
	if ((IResourceDelta.MARKERS & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("MARKERS"); //$NON-NLS-1$
	}
	if ((IResourceDelta.MOVED_FROM & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("MOVED_FROM"); //$NON-NLS-1$
	}
	if ((IResourceDelta.MOVED_TO & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("MOVED_TO"); //$NON-NLS-1$
	}
	if ((IResourceDelta.NO_CHANGE & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("NO_CHANGE"); //$NON-NLS-1$
	}
	if ((IResourceDelta.OPEN & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("OPEN"); //$NON-NLS-1$
	}
	if ((IResourceDelta.REMOVED & flags) != 0) {
	buffer.append("-");
	buffer.append("REMOVED");
	}
	if ((IResourceDelta.REMOVED_PHANTOM & flags) != 0 && showPhantoms) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("REMOVED_PHANTOM"); //$NON-NLS-1$
	}
	if ((IResourceDelta.REPLACED & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("REPLACED"); //$NON-NLS-1$
	}
	if ((IResourceDelta.SYNC & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("SYNC"); //$NON-NLS-1$
	}
	if ((IResourceDelta.TYPE & flags) != 0) {
	buffer.append("-"); //$NON-NLS-1$
	buffer.append("TYPE"); //$NON-NLS-1$
	}
	return buffer.toString();
	}

	@Override
	public Image getImage(Object obj) {
	DeltaNode node = (DeltaNode) obj;
	String imageKey;
	switch (node.getResource().getType()) {
	case IResource.ROOT :
	imageKey = ISharedImages.IMG_OBJ_FOLDER;
	break;
	case IResource.PROJECT :
	imageKey = org.eclipse.ui.ide.IDE.SharedImages.IMG_OBJ_PROJECT;
	break;
	case IResource.FOLDER :
	imageKey = ISharedImages.IMG_OBJ_FOLDER;
	break;
	case IResource.FILE :
	default :
	imageKey = ISharedImages.IMG_OBJ_FILE;
	break;
	}
	return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
	}

	private String getKindAsString(int kind) {
	if (kind == -1)
	return ""; //$NON-NLS-1$
	return " kind(" + getFlagsAsString(kind) + ") "; //$NON-NLS-1$ //$NON-NLS-2$
	}

	@Override
	public String getText(Object obj) {
	StringBuilder buffer = new StringBuilder(obj.toString());
	if (obj instanceof ResourceEventNode) {
	buffer.append("Workspace Root - "); //$NON-NLS-1$
	buffer.append(getEventTypeAsString(((ResourceEventNode) obj).getEventType()));
	}
	buffer.append(getKindAsString(((DeltaNode) obj).getDeltaKind()));
	buffer.append(getFlagsAsString(((DeltaNode) obj).getDeltaFlags()));
	return buffer.toString();
	}
	}

	protected Set<Action> eventActions = new HashSet<>();
	private Action PHANTOMS;
	private Action POST_BUILD;

	private Action POST_CHANGE;

	private Action PRE_BUILD;

	protected Object rootObject = ResourcesPlugin.getWorkspace();

	protected boolean showPhantoms = false;

	protected int typeFilter = IResourceChangeEvent.POST_CHANGE;

	protected TreeViewer viewer;

	/**
	* The constructor.
	*/
	public ResourceChangeView() {
	super();
	}

	/**
	* This is a callback that will allow us
	* to create the viewer and initialize it.
	*/
	@Override
	public void createPartControl(Composite parent) {
	viewer = new TreeViewer(parent, SWT.MULTI \| SWT.H_SCROLL \| SWT.V_SCROLL);
	viewer.setContentProvider(new ViewContentProvider());
	viewer.setLabelProvider(new ViewLabelProvider());
	viewer.setInput(rootObject);

	initializeActions();

	IActionBars bars = getViewSite().getActionBars();
	IMenuManager menuMgr = bars.getMenuManager();
	menuMgr.addMenuListener(this::fillPullDownBar);
	fillPullDownBar(menuMgr);

	// register for all types of events and then filter out the one that we
	// want based on the action settings.
	ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_BUILD \| IResourceChangeEvent.POST_CHANGE \| IResourceChangeEvent.PRE_BUILD);
	}

	/**
	* @see org.eclipse.ui.IWorkbenchPart#dispose()
	*/
	@Override
	public void dispose() {
	super.dispose();
	ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
	}

	/*
	* The content provider class is responsible for
	* providing objects to the view. It can wrap
	* existing objects in adapters or simply return
	* objects as-is. These objects may be sensitive
	* to the current input of the view, or ignore
	* it and always show the same content
	* (like Task List, for example).
	*/

	protected void fillPullDownBar(IMenuManager manager) {
	manager.removeAll();

	for (Action action : eventActions)
	manager.add(action);
	manager.add(new Separator("phantoms")); //$NON-NLS-1$
	manager.add(PHANTOMS);
	}

	private void initializeActions() {
	// create the actions for the drop-down menu
	POST_BUILD = new FilterAction("POST_BUILD", IResourceChangeEvent.POST_BUILD); //$NON-NLS-1$
	POST_CHANGE = new FilterAction("POST_CHANGE", IResourceChangeEvent.POST_CHANGE); //$NON-NLS-1$
	// default event type
	POST_CHANGE.setChecked(true);
	PRE_BUILD = new FilterAction("PRE_BUILD", IResourceChangeEvent.PRE_BUILD); //$NON-NLS-1$
	eventActions.add(POST_BUILD);
	eventActions.add(POST_CHANGE);
	eventActions.add(PRE_BUILD);
	PHANTOMS = new FilterPhantoms();
	}

	/**
	* @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(IResourceChangeEvent)
	*/
	@Override
	public void resourceChanged(IResourceChangeEvent event) {
	if (event.getType() != typeFilter)
	return;
	setRoot(event);
	}

	private void setRoot(IResourceChangeEvent event) {
	if (viewer == null)
	return;
	Display display = viewer.getControl().getDisplay();
	if (display == null)
	return;
	rootObject = event;
	display.asyncExec(() -> {
	viewer.getControl().setRedraw(false);
	viewer.setInput(ResourceChangeView.this.rootObject);
	viewer.expandAll();
	viewer.getControl().setRedraw(true);
	});
	}
	}