swt-design-2/Sleak.java.htm - www.eclipse.org/articles - Git at Google

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 <BODY><PRE>/*
  * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
  * This file is made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  */
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.widgets.*;
 import java.io.*;

 public class Sleak {
 	Display display;
 	Shell shell;
 	List list;
 	Canvas canvas;
 	Button start, stop, check;
 	Text text;
 	Label label;

 	Object [] oldObjects = new Object [0];
 	Error [] oldErrors = new Error [0];
 	Object [] objects = new Object [0];
 	Error [] errors = new Error [0];

 public void open () {
 	display = Display.getCurrent ();
 	shell = new Shell (display);
 	shell.setText ("S-Leak");
 	list = new List (shell, SWT.BORDER | SWT.V_SCROLL);
 	list.addListener (SWT.Selection, new Listener () {
 		public void handleEvent (Event event) {
 			refreshObject ();
 		}
 	});
 	text = new Text (shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
 	canvas = new Canvas (shell, SWT.BORDER);
 	canvas.addListener (SWT.Paint, new Listener () {
 		public void handleEvent (Event event) {
 			paintCanvas (event);
 		}
 	});
 	check = new Button (shell, SWT.CHECK);
 	check.setText ("Stack");
 	check.addListener (SWT.Selection, new Listener () {
 		public void handleEvent (Event e) {
 			toggleStackTrace ();
 		}
 	});
 	start = new Button (shell, SWT.PUSH);
 	start.setText ("Snap");
 	start.addListener (SWT.Selection, new Listener () {
 		public void handleEvent (Event event) {
 			refreshAll ();
 		}
 	});
 	stop = new Button (shell, SWT.PUSH);
 	stop.setText ("Diff");
 	stop.addListener (SWT.Selection, new Listener () {
 		public void handleEvent (Event event) {
 			refreshDifference ();
 		}
 	});
 	label = new Label (shell, SWT.BORDER);
 	label.setText ("0 object(s)");
 	shell.addListener (SWT.Resize, new Listener () {
 		public void handleEvent (Event e) {
 			layout ();
 		}
 	});
 	check.setSelection (false);
 	text.setVisible (false);
 	Point size = shell.getSize ();
 	shell.setSize (size.x / 2, size.y / 2);
 	shell.open ();
 }

 void refreshLabel () {
 	int colors = 0, cursors = 0, fonts = 0, gcs = 0, images = 0, regions = 0;
 	for (int i=0; i&lt;objects.length; i++) {
 		Object object = objects [i];
 		if (object instanceof Color) colors++;
 		if (object instanceof Cursor) cursors++;
 		if (object instanceof Font) fonts++;
 		if (object instanceof GC) gcs++;
 		if (object instanceof Image) images++;
 		if (object instanceof Region) regions++;
 	}
 	String string = "";
 	if (colors != 0) string += colors + " Color(s)\n";
 	if (cursors != 0) string += cursors + " Cursor(s)\n";
 	if (fonts != 0) string += fonts + " Font(s)\n";
 	if (gcs != 0) string += gcs + " GC(s)\n";
 	if (images != 0) string += images + " Image(s)\n";
 	/* Currently regions are not counted. */
 //	if (regions != 0) string += regions + " Region(s)\n";
 	if (string.length () != 0) {
 		string = string.substring (0, string.length () - 1);
 	}
 	label.setText (string);
 }

 void refreshDifference () {
 	DeviceData info = display.getDeviceData ();
 	if (!info.tracking) {
 		MessageBox dialog = new MessageBox (shell, SWT.ICON_WARNING | SWT.OK);
 		dialog.setText (shell.getText ());
 		dialog.setMessage ("Warning: Device is not tracking resource allocation");
 		dialog.open ();
 	}
 	Object [] newObjects = info.objects;
 	Error [] newErrors = info.errors;
 	Object [] diffObjects = new Object [newObjects.length];
 	Error [] diffErrors = new Error [newErrors.length];
 	int count = 0;
 	for (int i=0; i&lt;newObjects.length; i++) {
 		int index = 0;
 		while (index &lt; oldObjects.length) {
 			if (newObjects [i] == oldObjects [index]) break;
 			index++;
 		}
 		if (index == oldObjects.length) {
 			diffObjects [count] = newObjects [i];
 			diffErrors [count] = newErrors [i];
 			count++;
 		}
 	}
 	objects = new Object [count];
 	errors = new Error [count];
 	System.arraycopy (diffObjects, 0, objects, 0, count);
 	System.arraycopy (diffErrors, 0, errors, 0, count);
 	list.removeAll ();
 	text.setText ("");
 	canvas.redraw ();
 	for (int i=0; i&lt;objects.length; i++) {
 		list.add (objectName (objects [i]));
 	}
 	refreshLabel ();
 	layout ();
 }

 String objectName (Object object) {
 	String string = object.toString ();
 	int index = string.lastIndexOf ('.');
 	if (index == -1) return string;
 	return string.substring (index + 1, string.length ());
 }

 void toggleStackTrace () {
 	refreshObject ();
 	layout ();
 }

 void paintCanvas (Event event) {
 	canvas.setCursor (null);
 	int index = list.getSelectionIndex ();
 	if (index == -1) return;
 	GC gc = event.gc;
 	Object object = objects [index];
 	if (object instanceof Color) {
 		if (((Color)object).isDisposed ()) return;
 		gc.setBackground ((Color) object);
 		gc.fillRectangle (canvas.getClientArea());
 		return;
 	}
 	if (object instanceof Cursor) {
 		if (((Cursor)object).isDisposed ()) return;
 		canvas.setCursor ((Cursor) object);
 		return;
 	}
 	if (object instanceof Font) {
 		if (((Font)object).isDisposed ()) return;
 		gc.setFont ((Font) object);
 		FontData [] array = gc.getFont ().getFontData ();
 		String string = "";
 		String lf = text.getLineDelimiter ();
 		for (int i=0; i&lt;array.length; i++) {
 			FontData data = array [i];
 			String style = "NORMAL";
 			int bits = data.getStyle ();
 			if (bits != 0) {
 				if ((bits &amp; SWT.BOLD) != 0) style = "BOLD ";
 				if ((bits &amp; SWT.ITALIC) != 0) style += "ITALIC";
 			}
 			string += data.getName () + " " + data.getHeight () + " " + style + lf;
 		}
 		gc.drawString (string, 0, 0);
 		return;
 	}
 	//NOTHING TO DRAW FOR GC
 //	if (object instanceof GC) {
 //		return;
 //	}
 	if (object instanceof Image) {
 		if (((Image)object).isDisposed ()) return;
 		gc.drawImage ((Image) object, 0, 0);
 		return;
 	}
 	if (object instanceof Region) {
 		if (((Region)object).isDisposed ()) return;
 		String string = ((Region)object).getBounds().toString();
 		gc.drawString (string, 0, 0);
 		return;
 	}
 }

 void refreshObject () {
 	int index = list.getSelectionIndex ();
 	if (index == -1) return;
 	if (check.getSelection ()) {
 		ByteArrayOutputStream stream = new ByteArrayOutputStream ();
 		PrintStream s = new PrintStream (stream);
 		errors [index].printStackTrace (s);
 		text.setText (stream.toString ());
 		text.setVisible (true);
 		canvas.setVisible (false);
 	} else {
 		canvas.setVisible (true);
 		text.setVisible (false);
 		canvas.redraw ();
 	}
 }

 void refreshAll () {
 	oldObjects = new Object [0];
 	oldErrors = new Error [0];
 	refreshDifference ();
 	oldObjects = objects;
 	oldErrors = errors;
 }

 void layout () {
 	Rectangle rect = shell.getClientArea ();
 	String [] strings = new String [objects.length];
 	int width = 0;
 	String [] items = list.getItems ();
 	GC gc = new GC (list);
 	for (int i=0; i&lt;objects.length; i++) {
 		width = Math.max (width, gc.stringExtent (items [i]).x);
 	}
 	gc.dispose ();
 	Point size1 = start.computeSize (SWT.DEFAULT, SWT.DEFAULT);
 	Point size2 = stop.computeSize (SWT.DEFAULT, SWT.DEFAULT);
 	Point size3 = check.computeSize (SWT.DEFAULT, SWT.DEFAULT);
 	Point size4 = label.computeSize (SWT.DEFAULT, SWT.DEFAULT);
 	width = Math.max (size1.x, Math.max (size2.x, Math.max (size3.x, width)));
 	width = Math.max (64, Math.max (size4.x, list.computeSize (width, SWT.DEFAULT).x));
 	start.setBounds (0, 0, width, size1.y);
 	stop.setBounds (0, size1.y, width, size2.y);
 	check.setBounds (0, size1.y + size2.y, width, size3.y);
 	label.setBounds (0, rect.height - size4.y, width, size4.y);
 	int height = size1.y + size2.y + size3.y;
 	list.setBounds (0, height, width, rect.height - height - size4.y);
 	text.setBounds (width, 0, rect.width - width, rect.height);
 	canvas.setBounds (width, 0, rect.width - width, rect.height);
 }

 public static void main (String [] args) {
 	Display display = new Display ();
 	Sleak sleak = new Sleak ();
 	sleak.open ();
 	while (!sleak.shell.isDisposed ()) {
 		if (!display.readAndDispatch ()) display.sleep ();
 	}
 	display.dispose ();
 }

 }
 </PRE></BODY></HTML>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
	<!-- saved from url=(0086)http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/platform-swt-home/tools/sleak.html -->
	<HTML><HEAD>
	<META http-equiv=Content-Type content="text/html; charset=windows-1252">
	<META content="MSHTML 6.00.2800.1141" name=GENERATOR></HEAD>
	<BODY><PRE>/*
	* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
	* This file is made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*/
	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.widgets.*;
	import java.io.*;

	public class Sleak {
	Display display;
	Shell shell;
	List list;
	Canvas canvas;
	Button start, stop, check;
	Text text;
	Label label;

	Object [] oldObjects = new Object [0];
	Error [] oldErrors = new Error [0];
	Object [] objects = new Object [0];
	Error [] errors = new Error [0];

	public void open () {
	display = Display.getCurrent ();
	shell = new Shell (display);
	shell.setText ("S-Leak");
	list = new List (shell, SWT.BORDER \| SWT.V_SCROLL);
	list.addListener (SWT.Selection, new Listener () {
	public void handleEvent (Event event) {
	refreshObject ();
	}
	});
	text = new Text (shell, SWT.BORDER \| SWT.H_SCROLL \| SWT.V_SCROLL);
	canvas = new Canvas (shell, SWT.BORDER);
	canvas.addListener (SWT.Paint, new Listener () {
	public void handleEvent (Event event) {
	paintCanvas (event);
	}
	});
	check = new Button (shell, SWT.CHECK);
	check.setText ("Stack");
	check.addListener (SWT.Selection, new Listener () {
	public void handleEvent (Event e) {
	toggleStackTrace ();
	}
	});
	start = new Button (shell, SWT.PUSH);
	start.setText ("Snap");
	start.addListener (SWT.Selection, new Listener () {
	public void handleEvent (Event event) {
	refreshAll ();
	}
	});
	stop = new Button (shell, SWT.PUSH);
	stop.setText ("Diff");
	stop.addListener (SWT.Selection, new Listener () {
	public void handleEvent (Event event) {
	refreshDifference ();
	}
	});
	label = new Label (shell, SWT.BORDER);
	label.setText ("0 object(s)");
	shell.addListener (SWT.Resize, new Listener () {
	public void handleEvent (Event e) {
	layout ();
	}
	});
	check.setSelection (false);
	text.setVisible (false);
	Point size = shell.getSize ();
	shell.setSize (size.x / 2, size.y / 2);
	shell.open ();
	}

	void refreshLabel () {
	int colors = 0, cursors = 0, fonts = 0, gcs = 0, images = 0, regions = 0;
	for (int i=0; i<objects.length; i++) {
	Object object = objects [i];
	if (object instanceof Color) colors++;
	if (object instanceof Cursor) cursors++;
	if (object instanceof Font) fonts++;
	if (object instanceof GC) gcs++;
	if (object instanceof Image) images++;
	if (object instanceof Region) regions++;
	}
	String string = "";
	if (colors != 0) string += colors + " Color(s)\n";
	if (cursors != 0) string += cursors + " Cursor(s)\n";
	if (fonts != 0) string += fonts + " Font(s)\n";
	if (gcs != 0) string += gcs + " GC(s)\n";
	if (images != 0) string += images + " Image(s)\n";
	/* Currently regions are not counted. */
	// if (regions != 0) string += regions + " Region(s)\n";
	if (string.length () != 0) {
	string = string.substring (0, string.length () - 1);
	}
	label.setText (string);
	}

	void refreshDifference () {
	DeviceData info = display.getDeviceData ();
	if (!info.tracking) {
	MessageBox dialog = new MessageBox (shell, SWT.ICON_WARNING \| SWT.OK);
	dialog.setText (shell.getText ());
	dialog.setMessage ("Warning: Device is not tracking resource allocation");
	dialog.open ();
	}
	Object [] newObjects = info.objects;
	Error [] newErrors = info.errors;
	Object [] diffObjects = new Object [newObjects.length];
	Error [] diffErrors = new Error [newErrors.length];
	int count = 0;
	for (int i=0; i<newObjects.length; i++) {
	int index = 0;
	while (index < oldObjects.length) {
	if (newObjects [i] == oldObjects [index]) break;
	index++;
	}
	if (index == oldObjects.length) {
	diffObjects [count] = newObjects [i];
	diffErrors [count] = newErrors [i];
	count++;
	}
	}
	objects = new Object [count];
	errors = new Error [count];
	System.arraycopy (diffObjects, 0, objects, 0, count);
	System.arraycopy (diffErrors, 0, errors, 0, count);
	list.removeAll ();
	text.setText ("");
	canvas.redraw ();
	for (int i=0; i<objects.length; i++) {
	list.add (objectName (objects [i]));
	}
	refreshLabel ();
	layout ();
	}

	String objectName (Object object) {
	String string = object.toString ();
	int index = string.lastIndexOf ('.');
	if (index == -1) return string;
	return string.substring (index + 1, string.length ());
	}

	void toggleStackTrace () {
	refreshObject ();
	layout ();
	}

	void paintCanvas (Event event) {
	canvas.setCursor (null);
	int index = list.getSelectionIndex ();
	if (index == -1) return;
	GC gc = event.gc;
	Object object = objects [index];
	if (object instanceof Color) {
	if (((Color)object).isDisposed ()) return;
	gc.setBackground ((Color) object);
	gc.fillRectangle (canvas.getClientArea());
	return;
	}
	if (object instanceof Cursor) {
	if (((Cursor)object).isDisposed ()) return;
	canvas.setCursor ((Cursor) object);
	return;
	}
	if (object instanceof Font) {
	if (((Font)object).isDisposed ()) return;
	gc.setFont ((Font) object);
	FontData [] array = gc.getFont ().getFontData ();
	String string = "";
	String lf = text.getLineDelimiter ();
	for (int i=0; i<array.length; i++) {
	FontData data = array [i];
	String style = "NORMAL";
	int bits = data.getStyle ();
	if (bits != 0) {
	if ((bits & SWT.BOLD) != 0) style = "BOLD ";
	if ((bits & SWT.ITALIC) != 0) style += "ITALIC";
	}
	string += data.getName () + " " + data.getHeight () + " " + style + lf;
	}
	gc.drawString (string, 0, 0);
	return;
	}
	//NOTHING TO DRAW FOR GC
	// if (object instanceof GC) {
	// return;
	// }
	if (object instanceof Image) {
	if (((Image)object).isDisposed ()) return;
	gc.drawImage ((Image) object, 0, 0);
	return;
	}
	if (object instanceof Region) {
	if (((Region)object).isDisposed ()) return;
	String string = ((Region)object).getBounds().toString();
	gc.drawString (string, 0, 0);
	return;
	}
	}

	void refreshObject () {
	int index = list.getSelectionIndex ();
	if (index == -1) return;
	if (check.getSelection ()) {
	ByteArrayOutputStream stream = new ByteArrayOutputStream ();
	PrintStream s = new PrintStream (stream);
	errors [index].printStackTrace (s);
	text.setText (stream.toString ());
	text.setVisible (true);
	canvas.setVisible (false);
	} else {
	canvas.setVisible (true);
	text.setVisible (false);
	canvas.redraw ();
	}
	}

	void refreshAll () {
	oldObjects = new Object [0];
	oldErrors = new Error [0];
	refreshDifference ();
	oldObjects = objects;
	oldErrors = errors;
	}

	void layout () {
	Rectangle rect = shell.getClientArea ();
	String [] strings = new String [objects.length];
	int width = 0;
	String [] items = list.getItems ();
	GC gc = new GC (list);
	for (int i=0; i<objects.length; i++) {
	width = Math.max (width, gc.stringExtent (items [i]).x);
	}
	gc.dispose ();
	Point size1 = start.computeSize (SWT.DEFAULT, SWT.DEFAULT);
	Point size2 = stop.computeSize (SWT.DEFAULT, SWT.DEFAULT);
	Point size3 = check.computeSize (SWT.DEFAULT, SWT.DEFAULT);
	Point size4 = label.computeSize (SWT.DEFAULT, SWT.DEFAULT);
	width = Math.max (size1.x, Math.max (size2.x, Math.max (size3.x, width)));
	width = Math.max (64, Math.max (size4.x, list.computeSize (width, SWT.DEFAULT).x));
	start.setBounds (0, 0, width, size1.y);
	stop.setBounds (0, size1.y, width, size2.y);
	check.setBounds (0, size1.y + size2.y, width, size3.y);
	label.setBounds (0, rect.height - size4.y, width, size4.y);
	int height = size1.y + size2.y + size3.y;
	list.setBounds (0, height, width, rect.height - height - size4.y);
	text.setBounds (width, 0, rect.width - width, rect.height);
	canvas.setBounds (width, 0, rect.width - width, rect.height);
	}

	public static void main (String [] args) {
	Display display = new Display ();
	Sleak sleak = new Sleak ();
	sleak.open ();
	while (!sleak.shell.isDisposed ()) {
	if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
	}

	}
	</PRE></BODY></HTML>