/*
* @(#)Robot.java 1.27 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.awt;
import java.awt.peer.*;
import java.awt.image.*;
import java.awt.event.*;
import java.lang.reflect.InvocationTargetException;
import sun.awt.ComponentFactory;
import sun.awt.SunToolkit;
import sun.security.util.SecurityConstants;
/**
* This class is used to generate native system input events
* for the purposes of test automation, self-running demos, and
* other applications where control of the mouse and keyboard
* is needed. The primary purpose of Robot is to facilitate
* automated testing of Java platform implementations.
* <p>
* Using the class to generate input events differs from posting
* events to the AWT event queue or AWT components in that the
* events are generated in the platform's native input
* queue. For example, <code>Robot.mouseMove</code> will actually move
* the mouse cursor instead of just generating mouse move events.
* <p>
* Note that some platforms require special privileges or extensions
* to access low-level input control. If the current platform configuration
* does not allow input control, an <code>AWTException</code> will be thrown
* when trying to construct Robot objects. For example, X-Window systems
* will throw the exception if the XTEST 2.2 standard extension is not supported
* (or not enabled) by the X server.
* <p>
* Applications that use Robot for purposes other than self-testing should
* handle these error conditions gracefully.
*
* @version 1.27, 12/19/03
* @author Robi Khan
* @since 1.3
*/
public class Robot {
private static final int MAX_DELAY = 60000;
private RobotPeer peer;
private boolean isAutoWaitForIdle = false;
private int autoDelay = 0;
private static final int LEGAL_BUTTON_MASK =
InputEvent.BUTTON1_MASK|
InputEvent.BUTTON2_MASK|
InputEvent.BUTTON3_MASK;
private DirectColorModel screenCapCM = null;
/**
* Constructs a Robot object in the coordinate system of the primary screen.
* <p>
*
* @throws AWTException if the platform configuration does not allow
* low-level input control. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true
* @throws SecurityException if <code>createRobot</code> permission is not granted
* @see java.awt.GraphicsEnvironment#isHeadless
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public Robot() throws AWTException {
if (GraphicsEnvironment.isHeadless()) {
throw new AWTException("headless environment");
}
init(GraphicsEnvironment.getLocalGraphicsEnvironment()
.getDefaultScreenDevice());
}
/**
* Creates a Robot for the given screen device. Coordinates passed
* to Robot method calls like mouseMove and createScreenCapture will
* be interpreted as being in the same coordinate system as the
* specified screen. Note that depending on the platform configuration,
* multiple screens may either:
* <ul>
* <li>share the same coordinate system to form a combined virtual screen</li>
* <li>use different coordinate systems to act as independent screens</li>
* </ul>
* This constructor is meant for the latter case.
* <p>
* If screen devices are reconfigured such that the coordinate system is
* affected, the behavior of existing Robot objects is undefined.
*
* @param screen A screen GraphicsDevice indicating the coordinate
* system the Robot will operate in.
* @throws AWTException if the platform configuration does not allow
* low-level input control. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true.
* @throws IllegalArgumentException if <code>screen</code> is not a screen
* GraphicsDevice.
* @throws SecurityException if <code>createRobot</code> permission is not granted
* @see java.awt.GraphicsEnvironment#isHeadless
* @see GraphicsDevice
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public Robot(GraphicsDevice screen) throws AWTException {
checkIsScreenDevice(screen);
init(screen);
}
private void init(GraphicsDevice screen) throws AWTException {
checkRobotAllowed();
Toolkit toolkit = Toolkit.getDefaultToolkit();
if (toolkit instanceof ComponentFactory) {
peer = ((ComponentFactory)toolkit).createRobot(this, screen);
}
}
/* determine if the security policy allows Robot's to be created */
private void checkRobotAllowed() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkPermission(SecurityConstants.CREATE_ROBOT_PERMISSION);
}
}
/* check if the given device is a screen device */
private void checkIsScreenDevice(GraphicsDevice device) {
if (device == null || device.getType() != GraphicsDevice.TYPE_RASTER_SCREEN) {
throw new IllegalArgumentException("not a valid screen device");
}
}
/**
* Moves mouse pointer to given screen coordinates.
* @param x X position
* @param y Y position
*/
public synchronized void mouseMove(int x, int y) {
peer.mouseMove(x,y);
afterEvent();
}
/**
* Presses one or more mouse buttons. The mouse buttons should
* be released using the <code>mouseRelease</code> method.
*
* @param buttons the Button mask; a combination of one or more
* of these flags:
* <ul>
* <li><code>InputEvent.BUTTON1_MASK</code>
* <li><code>InputEvent.BUTTON2_MASK</code>
* <li><code>InputEvent.BUTTON3_MASK</code>
* </ul>
* @throws IllegalArgumentException if the button mask is not a
* valid combination
* @see #mouseRelease(int)
*/
public synchronized void mousePress(int buttons) {
checkButtonsArgument(buttons);
peer.mousePress(buttons);
afterEvent();
}
/**
* Releases one or more mouse buttons.
*
* @param buttons the Button mask; a combination of one or more
* of these flags:
* <ul>
* <li><code>InputEvent.BUTTON1_MASK</code>
* <li><code>InputEvent.BUTTON2_MASK</code>
* <li><code>InputEvent.BUTTON3_MASK</code>
* </ul>
* @see #mousePress(int)
* @throws IllegalArgumentException if the button mask is not a valid
* combination
*/
public synchronized void mouseRelease(int buttons) {
checkButtonsArgument(buttons);
peer.mouseRelease(buttons);
afterEvent();
}
private void checkButtonsArgument(int buttons) {
if ( (buttons|LEGAL_BUTTON_MASK) != LEGAL_BUTTON_MASK ) {
throw new IllegalArgumentException("Invalid combination of button flags");
}
}
/**
* Rotates the scroll wheel on wheel-equipped mice.
*
* @param wheelAmt number of "notches" to move the mouse wheel
* Negative values indicate movement up/away from the user,
* positive values indicate movement down/towards the user.
*
* @since 1.4
*/
public synchronized void mouseWheel(int wheelAmt) {
peer.mouseWheel(wheelAmt);
afterEvent();
}
/**
* Presses a given key. The key should be released using the
* <code>keyRelease</code> method.
* <p>
* Key codes that have more than one physical key associated with them
* (e.g. <code>KeyEvent.VK_SHIFT</code> could mean either the
* left or right shift key) will map to the left key.
*
* @param keycode Key to press (e.g. <code>KeyEvent.VK_A</code>)
* @throws IllegalArgumentException if <code>keycode</code> is not
* a valid key
* @see #keyRelease(int)
* @see java.awt.event.KeyEvent
*/
public synchronized void keyPress(int keycode) {
checkKeycodeArgument(keycode);
peer.keyPress(keycode);
afterEvent();
}
/**
* Releases a given key.
* <p>
* Key codes that have more than one physical key associated with them
* (e.g. <code>KeyEvent.VK_SHIFT</code> could mean either the
* left or right shift key) will map to the left key.
*
* @param keycode Key to release (e.g. <code>KeyEvent.VK_A</code>)
* @throws IllegalArgumentException if <code>keycode</code> is not a
* valid key
* @see #keyPress(int)
* @see java.awt.event.KeyEvent
*/
public synchronized void keyRelease(int keycode) {
checkKeycodeArgument(keycode);
peer.keyRelease(keycode);
afterEvent();
}
private void checkKeycodeArgument(int keycode) {
// rather than build a big table or switch statement here, we'll
// just check that the key isn't VK_UNDEFINED and assume that the
// peer implementations will throw an exception for other bogus
// values e.g. -1, 999999
if (keycode == KeyEvent.VK_UNDEFINED) {
throw new IllegalArgumentException("Invalid key code");
}
}
/**
* Returns the color of a pixel at the given screen coordinates.
* @param x X position of pixel
* @param y Y position of pixel
* @return Color of the pixel
*/
public synchronized Color getPixelColor(int x, int y) {
Color color = new Color(peer.getRGBPixel(x,y));
return color;
}
/**
* Creates an image containing pixels read from the screen. This image does
* not include the mouse cursor.
* @param screenRect Rect to capture in screen coordinates
* @return The captured image
* @throws IllegalArgumentException if <code>screenRect</code> width and height are not greater than zero
* @throws SecurityException if <code>readDisplayPixels</code> permission is not granted
* @see SecurityManager#checkPermission
* @see AWTPermission
*/
public synchronized BufferedImage createScreenCapture(Rectangle screenRect) {
checkScreenCaptureAllowed();
checkValidRect(screenRect);
BufferedImage image;
DataBufferInt buffer;
WritableRaster raster;
if (screenCapCM == null) {
/*
* Fix for 4285201
* Create a DirectColorModel equivalent to the default RGB ColorModel,
* except with no Alpha component.
*/
screenCapCM = new DirectColorModel(24,
/* red mask */ 0x00FF0000,
/* green mask */ 0x0000FF00,
/* blue mask */ 0x000000FF);
}
int pixels[];
int[] bandmasks = new int[3];
pixels = peer.getRGBPixels(screenRect);
buffer = new DataBufferInt(pixels, pixels.length);
bandmasks[0] = screenCapCM.getRedMask();
bandmasks[1] = screenCapCM.getGreenMask();
bandmasks[2] = screenCapCM.getBlueMask();
raster = Raster.createPackedRaster(buffer, screenRect.width, screenRect.height, screenRect.width, bandmasks, null);
image = new BufferedImage(screenCapCM, raster, false, null);
return image;
}
private static void checkValidRect(Rectangle rect) {
if (rect.width <= 0 || rect.height <= 0) {
throw new IllegalArgumentException("Rectangle width and height must be > 0");
}
}
private static void checkScreenCaptureAllowed() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkPermission(
SecurityConstants.READ_DISPLAY_PIXELS_PERMISSION);
}
}
/*
* Called after an event is generated
*/
private void afterEvent() {
autoWaitForIdle();
autoDelay();
}
/**
* Returns whether this Robot automatically invokes <code>waitForIdle</code>
* after generating an event.
* @return Whether <code>waitForIdle</code> is automatically called
*/
public synchronized boolean isAutoWaitForIdle() {
return isAutoWaitForIdle;
}
/**
* Sets whether this Robot automatically invokes <code>waitForIdle</code>
* after generating an event.
* @param isOn Whether <code>waitForIdle</code> is automatically invoked
*/
public synchronized void setAutoWaitForIdle(boolean isOn) {
isAutoWaitForIdle = isOn;
}
/*
* Calls waitForIdle after every event if so desired.
*/
private void autoWaitForIdle() {
if (isAutoWaitForIdle) {
waitForIdle();
}
}
/**
* Returns the number of milliseconds this Robot sleeps after generating an event.
*/
public synchronized int getAutoDelay() {
return autoDelay;
}
/**
* Sets the number of milliseconds this Robot sleeps after generating an event.
* @throws IllegalArgumentException If <code>ms</code> is not between 0 and 60,000 milliseconds inclusive
*/
public synchronized void setAutoDelay(int ms) {
checkDelayArgument(ms);
autoDelay = ms;
}
/*
* Automatically sleeps for the specified interval after event generated.
*/
private void autoDelay() {
delay(autoDelay);
}
/**
* Sleeps for the specified time.
* To catch any <code>InterruptedException</code>s that occur,
* <code>Thread.sleep()</code> may be used instead.
* @param ms time to sleep in milliseconds
* @throws IllegalArgumentException if <code>ms</code> is not between 0 and 60,000 milliseconds inclusive
* @see java.lang.Thread#sleep
*/
public synchronized void delay(int ms) {
checkDelayArgument(ms);
try {
Thread.sleep(ms);
} catch(InterruptedException ite) {
ite.printStackTrace();
}
}
private void checkDelayArgument(int ms) {
if (ms < 0 || ms > MAX_DELAY) {
throw new IllegalArgumentException("Delay must be to 0 to 60,000ms");
}
}
/**
* Waits until all events currently on the event queue have been processed.
* @throws IllegalThreadStateException if called on the AWT event dispatching thread
*/
public synchronized void waitForIdle() {
checkNotDispatchThread();
// post a dummy event to the queue so we know when
// all the events before it have been processed
try {
SunToolkit.flushPendingEvents();
EventQueue.invokeAndWait( new Runnable() {
public void run() {
// dummy implementation
}
} );
} catch(InterruptedException ite) {
System.err.println("Robot.waitForIdle, non-fatal exception caught:");
ite.printStackTrace();
} catch(InvocationTargetException ine) {
System.err.println("Robot.waitForIdle, non-fatal exception caught:");
ine.printStackTrace();
}
}
private void checkNotDispatchThread() {
if (EventQueue.isDispatchThread()) {
throw new IllegalThreadStateException("Cannot call method from the event dispatcher thread");
}
}
/**
* Returns a string representation of this Robot.
*
* @return the string representation.
*/
public synchronized String toString() {
String params = "autoDelay = "+getAutoDelay()+", "+"autoWaitForIdle = "+isAutoWaitForIdle();
return getClass().getName() + "[ " + params + " ]";
}
}
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