JDK8/Java8源码在线阅读
/*
* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.awt;
import java.awt.*;
import static java.awt.RenderingHints.*;
import java.awt.dnd.*;
import java.awt.dnd.peer.DragSourceContextPeer;
import java.awt.peer.*;
import java.awt.event.WindowEvent;
import java.awt.event.KeyEvent;
import java.awt.image.*;
import java.awt.TrayIcon;
import java.awt.SystemTray;
import java.awt.event.InputEvent;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import sun.awt.datatransfer.DataTransferer;
import sun.security.util.SecurityConstants;
import sun.util.logging.PlatformLogger;
import sun.misc.SoftCache;
import sun.font.FontDesignMetrics;
import sun.awt.im.InputContext;
import sun.awt.image.*;
import sun.net.util.URLUtil;
import sun.security.action.GetPropertyAction;
import sun.security.action.GetBooleanAction;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
public abstract class SunToolkit extends Toolkit
implements WindowClosingSupport, WindowClosingListener,
ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
// 8014718: logging has been removed from SunToolkit
/* Load debug settings for native code */
static {
if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
DebugSettings.init();
}
};
/**
* Special mask for the UngrabEvent events, in addition to the
* public masks defined in AWTEvent. Should be used as the mask
* value for Toolkit.addAWTEventListener.
*/
public static final int GRAB_EVENT_MASK = 0x80000000;
/* The key to put()/get() the PostEventQueue into/from the AppContext.
*/
private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
/**
* Number of buttons.
* By default it's taken from the system. If system value does not
* fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
*/
protected static int numberOfButtons = 0;
/* XFree standard mention 24 buttons as maximum:
* http://www.xfree86.org/current/mouse.4.html
* We workaround systems supporting more than 24 buttons.
* Otherwise, we have to use long type values as masks
* which leads to API change.
* InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
* the 4-bytes limit for the int type. (CR 6799099)
* One more bit is reserved for FIRST_HIGH_BIT.
*/
public final static int MAX_BUTTONS_SUPPORTED = 20;
/**
* Creates and initializes EventQueue instance for the specified
* AppContext.
* Note that event queue must be created from createNewAppContext()
* only in order to ensure that EventQueue constructor obtains
* the correct AppContext.
* @param appContext AppContext to associate with the event queue
*/
private static void initEQ(AppContext appContext) {
EventQueue eventQueue;
String eqName = System.getProperty("AWT.EventQueueClass",
"java.awt.EventQueue");
try {
eventQueue = (EventQueue)Class.forName(eqName).newInstance();
} catch (Exception e) {
e.printStackTrace();
System.err.println("Failed loading " + eqName + ": " + e);
eventQueue = new EventQueue();
}
appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
}
public SunToolkit() {
}
public boolean useBufferPerWindow() {
return false;
}
public abstract WindowPeer createWindow(Window target)
throws HeadlessException;
public abstract FramePeer createFrame(Frame target)
throws HeadlessException;
public abstract FramePeer createLightweightFrame(LightweightFrame target)
throws HeadlessException;
public abstract DialogPeer createDialog(Dialog target)
throws HeadlessException;
public abstract ButtonPeer createButton(Button target)
throws HeadlessException;
public abstract TextFieldPeer createTextField(TextField target)
throws HeadlessException;
public abstract ChoicePeer createChoice(Choice target)
throws HeadlessException;
public abstract LabelPeer createLabel(Label target)
throws HeadlessException;
public abstract ListPeer createList(java.awt.List target)
throws HeadlessException;
public abstract CheckboxPeer createCheckbox(Checkbox target)
throws HeadlessException;
public abstract ScrollbarPeer createScrollbar(Scrollbar target)
throws HeadlessException;
public abstract ScrollPanePeer createScrollPane(ScrollPane target)
throws HeadlessException;
public abstract TextAreaPeer createTextArea(TextArea target)
throws HeadlessException;
public abstract FileDialogPeer createFileDialog(FileDialog target)
throws HeadlessException;
public abstract MenuBarPeer createMenuBar(MenuBar target)
throws HeadlessException;
public abstract MenuPeer createMenu(Menu target)
throws HeadlessException;
public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
throws HeadlessException;
public abstract MenuItemPeer createMenuItem(MenuItem target)
throws HeadlessException;
public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
CheckboxMenuItem target)
throws HeadlessException;
public abstract DragSourceContextPeer createDragSourceContextPeer(
DragGestureEvent dge)
throws InvalidDnDOperationException;
public abstract TrayIconPeer createTrayIcon(TrayIcon target)
throws HeadlessException, AWTException;
public abstract SystemTrayPeer createSystemTray(SystemTray target);
public abstract boolean isTraySupported();
@SuppressWarnings("deprecation")
public abstract FontPeer getFontPeer(String name, int style);
public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
throws AWTException;
public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
throws HeadlessException;
/**
* The AWT lock is typically only used on Unix platforms to synchronize
* access to Xlib, OpenGL, etc. However, these methods are implemented
* in SunToolkit so that they can be called from shared code (e.g.
* from the OGL pipeline) or from the X11 pipeline regardless of whether
* XToolkit or MToolkit is currently in use. There are native macros
* (such as AWT_LOCK) defined in awt.h, so if the implementation of these
* methods is changed, make sure it is compatible with the native macros.
*
* Note: The following methods (awtLock(), awtUnlock(), etc) should be
* used in place of:
* synchronized (getAWTLock()) {
* ...
* }
*
* By factoring these methods out specially, we are able to change the
* implementation of these methods (e.g. use more advanced locking
* mechanisms) without impacting calling code.
*
* Sample usage:
* private void doStuffWithXlib() {
* assert !SunToolkit.isAWTLockHeldByCurrentThread();
* SunToolkit.awtLock();
* try {
* ...
* XlibWrapper.XDoStuff();
* } finally {
* SunToolkit.awtUnlock();
* }
* }
*/
private static final ReentrantLock AWT_LOCK = new ReentrantLock();
private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
public static final void awtLock() {
AWT_LOCK.lock();
}
public static final boolean awtTryLock() {
return AWT_LOCK.tryLock();
}
public static final void awtUnlock() {
AWT_LOCK.unlock();
}
public static final void awtLockWait()
throws InterruptedException
{
AWT_LOCK_COND.await();
}
public static final void awtLockWait(long timeout)
throws InterruptedException
{
AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
}
public static final void awtLockNotify() {
AWT_LOCK_COND.signal();
}
public static final void awtLockNotifyAll() {
AWT_LOCK_COND.signalAll();
}
public static final boolean isAWTLockHeldByCurrentThread() {
return AWT_LOCK.isHeldByCurrentThread();
}
/*
* Create a new AppContext, along with its EventQueue, for a
* new ThreadGroup. Browser code, for example, would use this
* method to create an AppContext & EventQueue for an Applet.
*/
public static AppContext createNewAppContext() {
ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
return createNewAppContext(threadGroup);
}
static final AppContext createNewAppContext(ThreadGroup threadGroup) {
// Create appContext before initialization of EventQueue, so all
// the calls to AppContext.getAppContext() from EventQueue ctor
// return correct values
AppContext appContext = new AppContext(threadGroup);
initEQ(appContext);
return appContext;
}
static void wakeupEventQueue(EventQueue q, boolean isShutdown){
AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
}
/*
* Fetch the peer associated with the given target (as specified
* in the peer creation method). This can be used to determine
* things like what the parent peer is. If the target is null
* or the target can't be found (either because the a peer was
* never created for it or the peer was disposed), a null will
* be returned.
*/
protected static Object targetToPeer(Object target) {
if (target != null && !GraphicsEnvironment.isHeadless()) {
return AWTAutoShutdown.getInstance().getPeer(target);
}
return null;
}
protected static void targetCreatedPeer(Object target, Object peer) {
if (target != null && peer != null &&
!GraphicsEnvironment.isHeadless())
{
AWTAutoShutdown.getInstance().registerPeer(target, peer);
}
}
protected static void targetDisposedPeer(Object target, Object peer) {
if (target != null && peer != null &&
!GraphicsEnvironment.isHeadless())
{
AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
}
}
// Maps from non-Component/MenuComponent to AppContext.
// WeakHashMap<Component,AppContext>
private static final Map<Object, AppContext> appContextMap =
Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
/**
* Sets the appContext field of target. If target is not a Component or
* MenuComponent, this returns false.
*/
private static boolean setAppContext(Object target,
AppContext context) {
if (target instanceof Component) {
AWTAccessor.getComponentAccessor().
setAppContext((Component)target, context);
} else if (target instanceof MenuComponent) {
AWTAccessor.getMenuComponentAccessor().
setAppContext((MenuComponent)target, context);
} else {
return false;
}
return true;
}
/**
* Returns the appContext field for target. If target is not a
* Component or MenuComponent this returns null.
*/
private static AppContext getAppContext(Object target) {
if (target instanceof Component) {
return AWTAccessor.getComponentAccessor().
getAppContext((Component)target);
} else if (target instanceof MenuComponent) {
return AWTAccessor.getMenuComponentAccessor().
getAppContext((MenuComponent)target);
} else {
return null;
}
}
/*
* Fetch the AppContext associated with the given target.
* This can be used to determine things like which EventQueue
* to use for posting events to a Component. If the target is
* null or the target can't be found, a null with be returned.
*/
public static AppContext targetToAppContext(Object target) {
if (target == null) {
return null;
}
AppContext context = getAppContext(target);
if (context == null) {
// target is not a Component/MenuComponent, try the
// appContextMap.
context = appContextMap.get(target);
}
return context;
}
/**
* Sets the synchronous status of focus requests on lightweight
* components in the specified window to the specified value.
* If the boolean parameter is <code>true</code> then the focus
* requests on lightweight components will be performed
* synchronously, if it is <code>false</code>, then asynchronously.
* By default, all windows have their lightweight request status
* set to asynchronous.
* <p>
* The application can only set the status of lightweight focus
* requests to synchronous for any of its windows if it doesn't
* perform focus transfers between different heavyweight containers.
* In this case the observable focus behaviour is the same as with
* asynchronous status.
* <p>
* If the application performs focus transfer between different
* heavyweight containers and sets the lightweight focus request
* status to synchronous for any of its windows, then further focus
* behaviour is unspecified.
* <p>
* @param w window for which the lightweight focus request status
* should be set
* @param status the value of lightweight focus request status
*/
public static void setLWRequestStatus(Window changed,boolean status){
AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
};
public static void checkAndSetPolicy(Container cont) {
FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
getCurrentKeyboardFocusManager().
getDefaultFocusTraversalPolicy();
cont.setFocusTraversalPolicy(defaultPolicy);
}
private static FocusTraversalPolicy createLayoutPolicy() {
FocusTraversalPolicy policy = null;
try {
Class<?> layoutPolicyClass =
Class.forName("javax.swing.LayoutFocusTraversalPolicy");
policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
}
catch (ClassNotFoundException e) {
assert false;
}
catch (InstantiationException e) {
assert false;
}
catch (IllegalAccessException e) {
assert false;
}
return policy;
}
/*
* Insert a mapping from target to AppContext, for later retrieval
* via targetToAppContext() above.
*/
public static void insertTargetMapping(Object target, AppContext appContext) {
if (!setAppContext(target, appContext)) {
// Target is not a Component/MenuComponent, use the private Map
// instead.
appContextMap.put(target, appContext);
}
}
/*
* Post an AWTEvent to the Java EventQueue, using the PostEventQueue
* to avoid possibly calling client code (EventQueueSubclass.postEvent())
* on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
* not be called under another lock since it locks the EventQueue.
* See bugids 4632918, 4526597.
*/
public static void postEvent(AppContext appContext, AWTEvent event) {
if (event == null) {
throw new NullPointerException();
}
AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
if (sea != null && sea.isSequencedEvent(event)) {
AWTEvent nested = sea.getNested(event);
if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
nested instanceof TimedWindowEvent)
{
TimedWindowEvent twe = (TimedWindowEvent)nested;
((SunToolkit)Toolkit.getDefaultToolkit()).
setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
}
}
// All events posted via this method are system-generated.
// Placing the following call here reduces considerably the
// number of places throughout the toolkit that would
// otherwise have to be modified to precisely identify
// system-generated events.
setSystemGenerated(event);
AppContext eventContext = targetToAppContext(event.getSource());
if (eventContext != null && !eventContext.equals(appContext)) {
throw new RuntimeException("Event posted on wrong app context : " + event);
}
PostEventQueue postEventQueue =
(PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
if (postEventQueue != null) {
postEventQueue.postEvent(event);
}
}
/*
* Post AWTEvent of high priority.
*/
public static void postPriorityEvent(final AWTEvent e) {
PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
public void run() {
AWTAccessor.getAWTEventAccessor().setPosted(e);
((Component)e.getSource()).dispatchEvent(e);
}
}, PeerEvent.ULTIMATE_PRIORITY_EVENT);
postEvent(targetToAppContext(e.getSource()), pe);
}
/*
* Flush any pending events which haven't been posted to the AWT
* EventQueue yet.
*/
public static void flushPendingEvents() {
AppContext appContext = AppContext.getAppContext();
flushPendingEvents(appContext);
}
/*
* Flush the PostEventQueue for the right AppContext.
* The default flushPendingEvents only flushes the thread-local context,
* which is not always correct, c.f. 3746956
*/
public static void flushPendingEvents(AppContext appContext) {
PostEventQueue postEventQueue =
(PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
if (postEventQueue != null) {
postEventQueue.flush();
}
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Does not wait for the execution to occur before
* returning to the caller.
*/
public static void executeOnEventHandlerThread(Object target,
Runnable runnable) {
executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
}
/*
* Fixed 5064013: the InvocationEvent time should be equals
* the time of the ActionEvent
*/
@SuppressWarnings("serial")
public static void executeOnEventHandlerThread(Object target,
Runnable runnable,
final long when) {
executeOnEventHandlerThread(
new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
public long getWhen() {
return when;
}
});
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Does not wait for the execution to occur before
* returning to the caller.
*/
public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
}
/*
* Execute a chunk of code on the Java event handler thread. The
* method takes into account provided AppContext and sets
* <code>SunToolkit.getDefaultToolkit()</code> as a target of the
* event. See 6451487 for detailes.
* Does not wait for the execution to occur before returning to
* the caller.
*/
public static void invokeLaterOnAppContext(
AppContext appContext, Runnable dispatcher)
{
postEvent(appContext,
new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
PeerEvent.PRIORITY_EVENT));
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Waits for the execution to occur before returning
* to the caller.
*/
public static void executeOnEDTAndWait(Object target, Runnable runnable)
throws InterruptedException, InvocationTargetException
{
if (EventQueue.isDispatchThread()) {
throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
}
class AWTInvocationLock {}
Object lock = new AWTInvocationLock();
PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
synchronized (lock) {
executeOnEventHandlerThread(event);
while(!event.isDispatched()) {
lock.wait();
}
}
Throwable eventThrowable = event.getThrowable();
if (eventThrowable != null) {
throw new InvocationTargetException(eventThrowable);
}
}
/*
* Returns true if the calling thread is the event dispatch thread
* contained within AppContext which associated with the given target.
* Use this call to ensure that a given task is being executed
* (or not being) on the event dispatch thread for the given target.
*/
public static boolean isDispatchThreadForAppContext(Object target) {
AppContext appContext = targetToAppContext(target);
EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
return accessor.isDispatchThreadImpl(eq);
}
public Dimension getScreenSize() {
return new Dimension(getScreenWidth(), getScreenHeight());
}
protected abstract int getScreenWidth();
protected abstract int getScreenHeight();
@SuppressWarnings("deprecation")
public FontMetrics getFontMetrics(Font font) {
return FontDesignMetrics.getMetrics(font);
}
@SuppressWarnings("deprecation")
public String[] getFontList() {
String[] hardwiredFontList = {
Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
Font.DIALOG_INPUT
// -- Obsolete font names from 1.0.2. It was decided that
// -- getFontList should not return these old names:
// "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
};
return hardwiredFontList;
}
public PanelPeer createPanel(Panel target) {
return (PanelPeer)createComponent(target);
}
public CanvasPeer createCanvas(Canvas target) {
return (CanvasPeer)createComponent(target);
}
/**
* Disables erasing of background on the canvas before painting if
* this is supported by the current toolkit. It is recommended to
* call this method early, before the Canvas becomes displayable,
* because some Toolkit implementations do not support changing
* this property once the Canvas becomes displayable.
*/
public void disableBackgroundErase(Canvas canvas) {
disableBackgroundEraseImpl(canvas);
}
/**
* Disables the native erasing of the background on the given
* component before painting if this is supported by the current
* toolkit. This only has an effect for certain components such as
* Canvas, Panel and Window. It is recommended to call this method
* early, before the Component becomes displayable, because some
* Toolkit implementations do not support changing this property
* once the Component becomes displayable.
*/
public void disableBackgroundErase(Component component) {
disableBackgroundEraseImpl(component);
}
private void disableBackgroundEraseImpl(Component component) {
AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
}
/**
* Returns the value of "sun.awt.noerasebackground" property. Default
* value is {@code false}.
*/
public static boolean getSunAwtNoerasebackground() {
return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
}
/**
* Returns the value of "sun.awt.erasebackgroundonresize" property. Default
* value is {@code false}.
*/
public static boolean getSunAwtErasebackgroundonresize() {
return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
}
static final SoftCache imgCache = new SoftCache();
static Image getImageFromHash(Toolkit tk, URL url) {
checkPermissions(url);
synchronized (imgCache) {
Image img = (Image)imgCache.get(url);
if (img == null) {
try {
img = tk.createImage(new URLImageSource(url));
imgCache.put(url, img);
} catch (Exception e) {
}
}
return img;
}
}
static Image getImageFromHash(Toolkit tk,
String filename) {
checkPermissions(filename);
synchronized (imgCache) {
Image img = (Image)imgCache.get(filename);
if (img == null) {
try {
img = tk.createImage(new FileImageSource(filename));
imgCache.put(filename, img);
} catch (Exception e) {
}
}
return img;
}
}
public Image getImage(String filename) {
return getImageFromHash(this, filename);
}
public Image getImage(URL url) {
return getImageFromHash(this, url);
}
protected Image getImageWithResolutionVariant(String fileName,
String resolutionVariantName) {
synchronized (imgCache) {
Image image = getImageFromHash(this, fileName);
if (image instanceof MultiResolutionImage) {
return image;
}
Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
image = createImageWithResolutionVariant(image, resolutionVariant);
imgCache.put(fileName, image);
return image;
}
}
protected Image getImageWithResolutionVariant(URL url,
URL resolutionVariantURL) {
synchronized (imgCache) {
Image image = getImageFromHash(this, url);
if (image instanceof MultiResolutionImage) {
return image;
}
Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
image = createImageWithResolutionVariant(image, resolutionVariant);
imgCache.put(url, image);
return image;
}
}
public Image createImage(String filename) {
checkPermissions(filename);
return createImage(new FileImageSource(filename));
}
public Image createImage(URL url) {
checkPermissions(url);
return createImage(new URLImageSource(url));
}
public Image createImage(byte[] data, int offset, int length) {
return createImage(new ByteArrayImageSource(data, offset, length));
}
public Image createImage(ImageProducer producer) {
return new ToolkitImage(producer);
}
public static Image createImageWithResolutionVariant(Image image,
Image resolutionVariant) {
return new MultiResolutionToolkitImage(image, resolutionVariant);
}
public int checkImage(Image img, int w, int h, ImageObserver o) {
if (!(img instanceof ToolkitImage)) {
return ImageObserver.ALLBITS;
}
ToolkitImage tkimg = (ToolkitImage)img;
int repbits;
if (w == 0 || h == 0) {
repbits = ImageObserver.ALLBITS;
} else {
repbits = tkimg.getImageRep().check(o);
}
return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
}
public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
if (w == 0 || h == 0) {
return true;
}
// Must be a ToolkitImage
if (!(img instanceof ToolkitImage)) {
return true;
}
ToolkitImage tkimg = (ToolkitImage)img;
if (tkimg.hasError()) {
if (o != null) {
o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
-1, -1, -1, -1);
}
return false;
}
ImageRepresentation ir = tkimg.getImageRep();
return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
}
private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
ToolkitImage rvImage = getResolutionVariant(img);
int rvw = getRVSize(w);
int rvh = getRVSize(h);
// Ignore the resolution variant in case of error
return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
getResolutionVariantObserver(
img, o, w, h, rvw, rvh, true));
}
private boolean prepareResolutionVariant(Image img, int w, int h,
ImageObserver o) {
ToolkitImage rvImage = getResolutionVariant(img);
int rvw = getRVSize(w);
int rvh = getRVSize(h);
// Ignore the resolution variant in case of error
return rvImage == null || rvImage.hasError() || prepareImage(
rvImage, rvw, rvh,
MultiResolutionToolkitImage.getResolutionVariantObserver(
img, o, w, h, rvw, rvh, true));
}
private static int getRVSize(int size){
return size == -1 ? -1 : 2 * size;
}
private static ToolkitImage getResolutionVariant(Image image) {
if (image instanceof MultiResolutionToolkitImage) {
Image resolutionVariant = ((MultiResolutionToolkitImage) image).
getResolutionVariant();
if (resolutionVariant instanceof ToolkitImage) {
return (ToolkitImage) resolutionVariant;
}
}
return null;
}
protected static boolean imageCached(Object key) {
return imgCache.containsKey(key);
}
protected static boolean imageExists(String filename) {
checkPermissions(filename);
return filename != null && new File(filename).exists();
}
@SuppressWarnings("try")
protected static boolean imageExists(URL url) {
checkPermissions(url);
if (url != null) {
try (InputStream is = url.openStream()) {
return true;
}catch(IOException e){
return false;
}
}
return false;
}
private static void checkPermissions(String filename) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkRead(filename);
}
}
private static void checkPermissions(URL url) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
java.security.Permission perm =
URLUtil.getConnectPermission(url);
if (perm != null) {
try {
sm.checkPermission(perm);
} catch (SecurityException se) {
// fallback to checkRead/checkConnect for pre 1.2
// security managers
if ((perm instanceof java.io.FilePermission) &&
perm.getActions().indexOf("read") != -1) {
sm.checkRead(perm.getName());
} else if ((perm instanceof
java.net.SocketPermission) &&
perm.getActions().indexOf("connect") != -1) {
sm.checkConnect(url.getHost(), url.getPort());
} else {
throw se;
}
}
}
} catch (java.io.IOException ioe) {
sm.checkConnect(url.getHost(), url.getPort());
}
}
}
/**
* Scans {@code imageList} for best-looking image of specified dimensions.
* Image can be scaled and/or padded with transparency.
*/
public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
if (width == 0 || height == 0) {
return null;
}
Image bestImage = null;
int bestWidth = 0;
int bestHeight = 0;
double bestSimilarity = 3; //Impossibly high value
double bestScaleFactor = 0;
for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
//Iterate imageList looking for best matching image.
//'Similarity' measure is defined as good scale factor and small insets.
//best possible similarity is 0 (no scale, no insets).
//It's found while the experiments that good-looking result is achieved
//with scale factors x1, x3/4, x2/3, xN, x1/N.
Image im = i.next();
if (im == null) {
continue;
}
if (im instanceof ToolkitImage) {
ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
ir.reconstruct(ImageObserver.ALLBITS);
}
int iw;
int ih;
try {
iw = im.getWidth(null);
ih = im.getHeight(null);
} catch (Exception e){
continue;
}
if (iw > 0 && ih > 0) {
//Calc scale factor
double scaleFactor = Math.min((double)width / (double)iw,
(double)height / (double)ih);
//Calculate scaled image dimensions
//adjusting scale factor to nearest "good" value
int adjw = 0;
int adjh = 0;
double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
if (scaleFactor >= 2) {
//Need to enlarge image more than twice
//Round down scale factor to multiply by integer value
scaleFactor = Math.floor(scaleFactor);
adjw = iw * (int)scaleFactor;
adjh = ih * (int)scaleFactor;
scaleMeasure = 1.0 - 0.5 / scaleFactor;
} else if (scaleFactor >= 1) {
//Don't scale
scaleFactor = 1.0;
adjw = iw;
adjh = ih;
scaleMeasure = 0;
} else if (scaleFactor >= 0.75) {
//Multiply by 3/4
scaleFactor = 0.75;
adjw = iw * 3 / 4;
adjh = ih * 3 / 4;
scaleMeasure = 0.3;
} else if (scaleFactor >= 0.6666) {
//Multiply by 2/3
scaleFactor = 0.6666;
adjw = iw * 2 / 3;
adjh = ih * 2 / 3;
scaleMeasure = 0.33;
} else {
//Multiply size by 1/scaleDivider
//where scaleDivider is minimum possible integer
//larger than 1/scaleFactor
double scaleDivider = Math.ceil(1.0 / scaleFactor);
scaleFactor = 1.0 / scaleDivider;
adjw = (int)Math.round((double)iw / scaleDivider);
adjh = (int)Math.round((double)ih / scaleDivider);
scaleMeasure = 1.0 - 1.0 / scaleDivider;
}
double similarity = ((double)width - (double)adjw) / (double)width +
((double)height - (double)adjh) / (double)height + //Large padding is bad
scaleMeasure; //Large rescale is bad
if (similarity < bestSimilarity) {
bestSimilarity = similarity;
bestScaleFactor = scaleFactor;
bestImage = im;
bestWidth = adjw;
bestHeight = adjh;
}
if (similarity == 0) break;
}
}
if (bestImage == null) {
//No images were found, possibly all are broken
return null;
}
BufferedImage bimage =
new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = bimage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
try {
int x = (width - bestWidth) / 2;
int y = (height - bestHeight) / 2;
g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
} finally {
g.dispose();
}
return bimage;
}
public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
BufferedImage bimage = getScaledIconImage(imageList, width, height);
if (bimage == null) {
return null;
}
Raster raster = bimage.getRaster();
DataBuffer buffer = raster.getDataBuffer();
return (DataBufferInt)buffer;
}
protected EventQueue getSystemEventQueueImpl() {
return getSystemEventQueueImplPP();
}
// Package private implementation
static EventQueue getSystemEventQueueImplPP() {
return getSystemEventQueueImplPP(AppContext.getAppContext());
}
public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
EventQueue theEventQueue =
(EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
return theEventQueue;
}
/**
* Give native peers the ability to query the native container
* given a native component (eg the direct parent may be lightweight).
*/
public static Container getNativeContainer(Component c) {
return Toolkit.getNativeContainer(c);
}
/**
* Gives native peers the ability to query the closest HW component.
* If the given component is heavyweight, then it returns this. Otherwise,
* it goes one level up in the hierarchy and tests next component.
*/
public static Component getHeavyweightComponent(Component c) {
while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
c = AWTAccessor.getComponentAccessor().getParent(c);
}
return c;
}
/**
* Returns key modifiers used by Swing to set up a focus accelerator key stroke.
*/
public int getFocusAcceleratorKeyMask() {
return InputEvent.ALT_MASK;
}
/**
* Tests whether specified key modifiers mask can be used to enter a printable
* character. This is a default implementation of this method, which reflects
* the way things work on Windows: here, pressing ctrl + alt allows user to enter
* characters from the extended character set (like euro sign or math symbols)
*/
public boolean isPrintableCharacterModifiersMask(int mods) {
return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
}
/**
* Returns whether popup is allowed to be shown above the task bar.
* This is a default implementation of this method, which checks
* corresponding security permission.
*/
public boolean canPopupOverlapTaskBar() {
boolean result = true;
try {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(
SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
}
} catch (SecurityException se) {
// There is no permission to show popups over the task bar
result = false;
}
return result;
}
/**
* Returns a new input method window, with behavior as specified in
* {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
* If the inputContext is not null, the window should return it from its
* getInputContext() method. The window needs to implement
* sun.awt.im.InputMethodWindow.
* <p>
* SunToolkit subclasses can override this method to return better input
* method windows.
*/
public Window createInputMethodWindow(String title, InputContext context) {
return new sun.awt.im.SimpleInputMethodWindow(title, context);
}
/**
* Returns whether enableInputMethods should be set to true for peered
* TextComponent instances on this platform. False by default.
*/
public boolean enableInputMethodsForTextComponent() {
return false;
}
private static Locale startupLocale = null;
/**
* Returns the locale in which the runtime was started.
*/
public static Locale getStartupLocale() {
if (startupLocale == null) {
String language, region, country, variant;
language = AccessController.doPrivileged(
new GetPropertyAction("user.language", "en"));
// for compatibility, check for old user.region property
region = AccessController.doPrivileged(
new GetPropertyAction("user.region"));
if (region != null) {
// region can be of form country, country_variant, or _variant
int i = region.indexOf('_');
if (i >= 0) {
country = region.substring(0, i);
variant = region.substring(i + 1);
} else {
country = region;
variant = "";
}
} else {
country = AccessController.doPrivileged(
new GetPropertyAction("user.country", ""));
variant = AccessController.doPrivileged(
new GetPropertyAction("user.variant", ""));
}
startupLocale = new Locale(language, country, variant);
}
return startupLocale;
}
/**
* Returns the default keyboard locale of the underlying operating system
*/
public Locale getDefaultKeyboardLocale() {
return getStartupLocale();
}
// Support for window closing event notifications
private transient WindowClosingListener windowClosingListener = null;
/**
* @see sun.awt.WindowClosingSupport#getWindowClosingListener
*/
public WindowClosingListener getWindowClosingListener() {
return windowClosingListener;
}
/**
* @see sun.awt.WindowClosingSupport#setWindowClosingListener
*/
public void setWindowClosingListener(WindowClosingListener wcl) {
windowClosingListener = wcl;
}
/**
* @see sun.awt.WindowClosingListener#windowClosingNotify
*/
public RuntimeException windowClosingNotify(WindowEvent event) {
if (windowClosingListener != null) {
return windowClosingListener.windowClosingNotify(event);
} else {
return null;
}
}
/**
* @see sun.awt.WindowClosingListener#windowClosingDelivered
*/
public RuntimeException windowClosingDelivered(WindowEvent event) {
if (windowClosingListener != null) {
return windowClosingListener.windowClosingDelivered(event);
} else {
return null;
}
}
private static DefaultMouseInfoPeer mPeer = null;
protected synchronized MouseInfoPeer getMouseInfoPeer() {
if (mPeer == null) {
mPeer = new DefaultMouseInfoPeer();
}
return mPeer;
}
/**
* Returns whether default toolkit needs the support of the xembed
* from embedding host(if any).
* @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
*/
public static boolean needsXEmbed() {
String noxembed = AccessController.
doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
if ("true".equals(noxembed)) {
return false;
}
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
// SunToolkit descendants should override this method to specify
// concrete behavior
return ((SunToolkit)tk).needsXEmbedImpl();
} else {
// Non-SunToolkit doubtly might support XEmbed
return false;
}
}
/**
* Returns whether this toolkit needs the support of the xembed
* from embedding host(if any).
* @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
*/
protected boolean needsXEmbedImpl() {
return false;
}
private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
/**
* Returns whether the XEmbed server feature is requested by
* developer. If true, Toolkit should return an
* XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
*/
protected final boolean isXEmbedServerRequested() {
return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
}
/**
* Returns whether the modal exclusion API is supported by the current toolkit.
* When it isn't supported, calling <code>setModalExcluded</code> has no
* effect, and <code>isModalExcluded</code> returns false for all windows.
*
* @return true if modal exclusion is supported by the toolkit, false otherwise
*
* @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
* @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
*
* @since 1.5
*/
public static boolean isModalExcludedSupported()
{
Toolkit tk = Toolkit.getDefaultToolkit();
return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
}
/*
* Default implementation for isModalExcludedSupportedImpl(), returns false.
*
* @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
* @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
*
* @since 1.5
*/
protected boolean isModalExcludedSupportedImpl()
{
return false;
}
/*
* Sets this window to be excluded from being modally blocked. When the
* toolkit supports modal exclusion and this method is called, input
* events, focus transfer and z-order will continue to work for the
* window, it's owned windows and child components, even in the
* presence of a modal dialog.
* For details on which <code>Window</code>s are normally blocked
* by modal dialog, see {@link java.awt.Dialog}.
* Invoking this method when the modal exclusion API is not supported by
* the current toolkit has no effect.
* @param window Window to be marked as not modally blocked
* @see java.awt.Dialog
* @see java.awt.Dialog#setModal(boolean)
* @see sun.awt.SunToolkit#isModalExcludedSupported
* @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
*/
public static void setModalExcluded(Window window)
{
if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
}
window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
}
/*
* Returns whether the specified window is blocked by modal dialogs.
* If the modal exclusion API isn't supported by the current toolkit,
* it returns false for all windows.
*
* @param window Window to test for modal exclusion
*
* @return true if the window is modal excluded, false otherwise. If
* the modal exclusion isn't supported by the current Toolkit, false
* is returned
*
* @see sun.awt.SunToolkit#isModalExcludedSupported
* @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
*
* @since 1.5
*/
public static boolean isModalExcluded(Window window)
{
if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
}
return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
}
/**
* Overridden in XToolkit and WToolkit
*/
public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
return (modalityType == Dialog.ModalityType.MODELESS) ||
(modalityType == Dialog.ModalityType.APPLICATION_MODAL);
}
/**
* Overridden in XToolkit and WToolkit
*/
public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
}
///////////////////////////////////////////////////////////////////////////
//
// The following is used by the Java Plug-in to coordinate dialog modality
// between containing applications (browsers, ActiveX containers etc) and
// the AWT.
//
///////////////////////////////////////////////////////////////////////////
private ModalityListenerList modalityListeners = new ModalityListenerList();
public void addModalityListener(ModalityListener listener) {
modalityListeners.add(listener);
}
public void removeModalityListener(ModalityListener listener) {
modalityListeners.remove(listener);
}
public void notifyModalityPushed(Dialog dialog) {
notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
}
public void notifyModalityPopped(Dialog dialog) {
notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
}
final void notifyModalityChange(int id, Dialog source) {
ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
ev.dispatch();
}
static class ModalityListenerList implements ModalityListener {
Vector<ModalityListener> listeners = new Vector<ModalityListener>();
void add(ModalityListener listener) {
listeners.addElement(listener);
}
void remove(ModalityListener listener) {
listeners.removeElement(listener);
}
public void modalityPushed(ModalityEvent ev) {
Iterator<ModalityListener> it = listeners.iterator();
while (it.hasNext()) {
it.next().modalityPushed(ev);
}
}
public void modalityPopped(ModalityEvent ev) {
Iterator<ModalityListener> it = listeners.iterator();
while (it.hasNext()) {
it.next().modalityPopped(ev);
}
}
} // end of class ModalityListenerList
///////////////////////////////////////////////////////////////////////////
// End Plug-in code
///////////////////////////////////////////////////////////////////////////
public static boolean isLightweightOrUnknown(Component comp) {
if (comp.isLightweight()
|| !(getDefaultToolkit() instanceof SunToolkit))
{
return true;
}
return !(comp instanceof Button
|| comp instanceof Canvas
|| comp instanceof Checkbox
|| comp instanceof Choice
|| comp instanceof Label
|| comp instanceof java.awt.List
|| comp instanceof Panel
|| comp instanceof Scrollbar
|| comp instanceof ScrollPane
|| comp instanceof TextArea
|| comp instanceof TextField
|| comp instanceof Window);
}
@SuppressWarnings("serial")
public static class OperationTimedOut extends RuntimeException {
public OperationTimedOut(String msg) {
super(msg);
}
public OperationTimedOut() {
}
}
@SuppressWarnings("serial")
public static class InfiniteLoop extends RuntimeException {
}
@SuppressWarnings("serial")
public static class IllegalThreadException extends RuntimeException {
public IllegalThreadException(String msg) {
super(msg);
}
public IllegalThreadException() {
}
}
public static final int DEFAULT_WAIT_TIME = 10000;
private static final int MAX_ITERS = 20;
private static final int MIN_ITERS = 0;
private static final int MINIMAL_EDELAY = 0;
/**
* Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
*/
public void realSync() throws OperationTimedOut, InfiniteLoop {
realSync(DEFAULT_WAIT_TIME);
}
/**
* Forces toolkit to synchronize with the native windowing
* sub-system, flushing all pending work and waiting for all the
* events to be processed. This method guarantees that after
* return no additional Java events will be generated, unless
* cause by user. Obviously, the method cannot be used on the
* event dispatch thread (EDT). In case it nevertheless gets
* invoked on this thread, the method throws the
* IllegalThreadException runtime exception.
*
* <p> This method allows to write tests without explicit timeouts
* or wait for some event. Example:
* <code>
* Frame f = ...;
* f.setVisible(true);
* ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
* </code>
*
* <p> After realSync, <code>f</code> will be completely visible
* on the screen, its getLocationOnScreen will be returning the
* right result and it will be the focus owner.
*
* <p> Another example:
* <code>
* b.requestFocus();
* ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
* </code>
*
* <p> After realSync, <code>b</code> will be focus owner.
*
* <p> Notice that realSync isn't guaranteed to work if recurring
* actions occur, such as if during processing of some event
* another request which may generate some events occurs. By
* default, sync tries to perform as much as {@value MAX_ITERS}
* cycles of event processing, allowing for roughly {@value
* MAX_ITERS} additional requests.
*
* <p> For example, requestFocus() generates native request, which
* generates one or two Java focus events, which then generate a
* serie of paint events, a serie of Java focus events, which then
* generate a serie of paint events which then are processed -
* three cycles, minimum.
*
* @param timeout the maximum time to wait in milliseconds, negative means "forever".
*/
public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
{
if (EventQueue.isDispatchThread()) {
throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
}
int bigLoop = 0;
do {
// Let's do sync first
sync();
// During the wait process, when we were processing incoming
// events, we could have made some new request, which can
// generate new events. Example: MapNotify/XSetInputFocus.
// Therefore, we dispatch them as long as there is something
// to dispatch.
int iters = 0;
while (iters < MIN_ITERS) {
syncNativeQueue(timeout);
iters++;
}
while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
iters++;
}
if (iters >= MAX_ITERS) {
throw new InfiniteLoop();
}
// native requests were dispatched by X/Window Manager or Windows
// Moreover, we processed them all on Toolkit thread
// Now wait while EDT processes them.
//
// During processing of some events (focus, for example),
// some other events could have been generated. So, after
// waitForIdle, we may end up with full EventQueue
iters = 0;
while (iters < MIN_ITERS) {
waitForIdle(timeout);
iters++;
}
while (waitForIdle(timeout) && iters < MAX_ITERS) {
iters++;
}
if (iters >= MAX_ITERS) {
throw new InfiniteLoop();
}
bigLoop++;
// Again, for Java events, it was simple to check for new Java
// events by checking event queue, but what if Java events
// resulted in native requests? Therefor, check native events again.
} while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
}
/**
* Platform toolkits need to implement this method to perform the
* sync of the native queue. The method should wait until native
* requests are processed, all native events are processed and
* corresponding Java events are generated. Should return
* <code>true</code> if some events were processed,
* <code>false</code> otherwise.
*/
protected abstract boolean syncNativeQueue(final long timeout);
private boolean eventDispatched = false;
private boolean queueEmpty = false;
private final Object waitLock = "Wait Lock";
private boolean isEQEmpty() {
EventQueue queue = getSystemEventQueueImpl();
return AWTAccessor.getEventQueueAccessor().noEvents(queue);
}
/**
* Waits for the Java event queue to empty. Ensures that all
* events are processed (including paint events), and that if
* recursive events were generated, they are also processed.
* Should return <code>true</code> if more processing is
* necessary, <code>false</code> otherwise.
*/
@SuppressWarnings("serial")
protected final boolean waitForIdle(final long timeout) {
flushPendingEvents();
boolean queueWasEmpty = isEQEmpty();
queueEmpty = false;
eventDispatched = false;
synchronized(waitLock) {
postEvent(AppContext.getAppContext(),
new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
public void dispatch() {
// Here we block EDT. It could have some
// events, it should have dispatched them by
// now. So native requests could have been
// generated. First, dispatch them. Then,
// flush Java events again.
int iters = 0;
while (iters < MIN_ITERS) {
syncNativeQueue(timeout);
iters++;
}
while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
iters++;
}
flushPendingEvents();
synchronized(waitLock) {
queueEmpty = isEQEmpty();
eventDispatched = true;
waitLock.notifyAll();
}
}
});
try {
while (!eventDispatched) {
waitLock.wait();
}
} catch (InterruptedException ie) {
return false;
}
}
try {
Thread.sleep(MINIMAL_EDELAY);
} catch (InterruptedException ie) {
throw new RuntimeException("Interrupted");
}
flushPendingEvents();
// Lock to force write-cache flush for queueEmpty.
synchronized (waitLock) {
return !(queueEmpty && isEQEmpty() && queueWasEmpty);
}
}
/**
* Grabs the mouse input for the given window. The window must be
* visible. The window or its children do not receive any
* additional mouse events besides those targeted to them. All
* other events will be dispatched as before - to the respective
* targets. This Window will receive UngrabEvent when automatic
* ungrab is about to happen. The event can be listened to by
* installing AWTEventListener with WINDOW_EVENT_MASK. See
* UngrabEvent class for the list of conditions when ungrab is
* about to happen.
* @see UngrabEvent
*/
public abstract void grab(Window w);
/**
* Forces ungrab. No event will be sent.
*/
public abstract void ungrab(Window w);
/**
* Locates the splash screen library in a platform dependent way and closes
* the splash screen. Should be invoked on first top-level frame display.
* @see java.awt.SplashScreen
* @since 1.6
*/
public static native void closeSplashScreen();
/* The following methods and variables are to support retrieving
* desktop text anti-aliasing settings
*/
/* Need an instance method because setDesktopProperty(..) is protected. */
private void fireDesktopFontPropertyChanges() {
setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
SunToolkit.getDesktopFontHints());
}
private static boolean checkedSystemAAFontSettings;
private static boolean useSystemAAFontSettings;
private static boolean lastExtraCondition = true;
private static RenderingHints desktopFontHints;
/* Since Swing is the reason for this "extra condition" logic its
* worth documenting it in some detail.
* First, a goal is for Swing and applications to both retrieve and
* use the same desktop property value so that there is complete
* consistency between the settings used by JDK's Swing implementation
* and 3rd party custom Swing components, custom L&Fs and any general
* text rendering that wants to be consistent with these.
* But by default on Solaris & Linux Swing will not use AA text over
* remote X11 display (unless Xrender can be used which is TBD and may not
* always be available anyway) as that is a noticeable performance hit.
* So there needs to be a way to express that extra condition so that
* it is seen by all clients of the desktop property API.
* If this were the only condition it could be handled here as it would
* be the same for any L&F and could reasonably be considered to be
* a static behaviour of those systems.
* But GTK currently has an additional test based on locale which is
* not applied by Metal. So mixing GTK in a few locales with Metal
* would mean the last one wins.
* This could be stored per-app context which would work
* for different applets, but wouldn't help for a single application
* using GTK and some other L&F concurrently.
* But it is expected this will be addressed within GTK and the font
* system so is a temporary and somewhat unlikely harmless corner case.
*/
public static void setAAFontSettingsCondition(boolean extraCondition) {
if (extraCondition != lastExtraCondition) {
lastExtraCondition = extraCondition;
if (checkedSystemAAFontSettings) {
/* Someone already asked for this info, under a different
* condition.
* We'll force re-evaluation instead of replicating the
* logic, then notify any listeners of any change.
*/
checkedSystemAAFontSettings = false;
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
((SunToolkit)tk).fireDesktopFontPropertyChanges();
}
}
}
}
/* "false", "off", ""default" aren't explicitly tested, they
* just fall through to produce a null return which all are equated to
* "false".
*/
private static RenderingHints getDesktopAAHintsByName(String hintname) {
Object aaHint = null;
hintname = hintname.toLowerCase(Locale.ENGLISH);
if (hintname.equals("on")) {
aaHint = VALUE_TEXT_ANTIALIAS_ON;
} else if (hintname.equals("gasp")) {
aaHint = VALUE_TEXT_ANTIALIAS_GASP;
} else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
} else if (hintname.equals("lcd_hbgr")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
} else if (hintname.equals("lcd_vrgb")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
} else if (hintname.equals("lcd_vbgr")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
}
if (aaHint != null) {
RenderingHints map = new RenderingHints(null);
map.put(KEY_TEXT_ANTIALIASING, aaHint);
return map;
} else {
return null;
}
}
/* This method determines whether to use the system font settings,
* or ignore them if a L&F has specified they should be ignored, or
* to override both of these with a system property specified value.
* If the toolkit isn't a SunToolkit, (eg may be headless) then that
* system property isn't applied as desktop properties are considered
* to be inapplicable in that case. In that headless case although
* this method will return "true" the toolkit will return a null map.
*/
private static boolean useSystemAAFontSettings() {
if (!checkedSystemAAFontSettings) {
useSystemAAFontSettings = true; /* initially set this true */
String systemAAFonts = null;
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
systemAAFonts =
AccessController.doPrivileged(
new GetPropertyAction("awt.useSystemAAFontSettings"));
}
if (systemAAFonts != null) {
useSystemAAFontSettings =
Boolean.valueOf(systemAAFonts).booleanValue();
/* If it is anything other than "true", then it may be
* a hint name , or it may be "off, "default", etc.
*/
if (!useSystemAAFontSettings) {
desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
}
}
/* If its still true, apply the extra condition */
if (useSystemAAFontSettings) {
useSystemAAFontSettings = lastExtraCondition;
}
checkedSystemAAFontSettings = true;
}
return useSystemAAFontSettings;
}
/* A variable defined for the convenience of JDK code */
public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
/* Overridden by subclasses to return platform/desktop specific values */
protected RenderingHints getDesktopAAHints() {
return null;
}
/* Subclass desktop property loading methods call this which
* in turn calls the appropriate subclass implementation of
* getDesktopAAHints() when system settings are being used.
* Its public rather than protected because subclasses may delegate
* to a helper class.
*/
public static RenderingHints getDesktopFontHints() {
if (useSystemAAFontSettings()) {
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
Object map = ((SunToolkit)tk).getDesktopAAHints();
return (RenderingHints)map;
} else { /* Headless Toolkit */
return null;
}
} else if (desktopFontHints != null) {
/* cloning not necessary as the return value is cloned later, but
* its harmless.
*/
return (RenderingHints)(desktopFontHints.clone());
} else {
return null;
}
}
public abstract boolean isDesktopSupported();
/*
* consumeNextKeyTyped() method is not currently used,
* however Swing could use it in the future.
*/
public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
try {
AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
(DefaultKeyboardFocusManager)KeyboardFocusManager.
getCurrentKeyboardFocusManager(),
keyEvent);
} catch (ClassCastException cce) {
cce.printStackTrace();
}
}
protected static void dumpPeers(final PlatformLogger aLog) {
AWTAutoShutdown.getInstance().dumpPeers(aLog);
}
/**
* Returns the <code>Window</code> ancestor of the component <code>comp</code>.
* @return Window ancestor of the component or component by itself if it is Window;
* null, if component is not a part of window hierarchy
*/
public static Window getContainingWindow(Component comp) {
while (comp != null && !(comp instanceof Window)) {
comp = comp.getParent();
}
return (Window)comp;
}
private static Boolean sunAwtDisableMixing = null;
/**
* Returns the value of "sun.awt.disableMixing" property. Default
* value is {@code false}.
*/
public synchronized static boolean getSunAwtDisableMixing() {
if (sunAwtDisableMixing == null) {
sunAwtDisableMixing = AccessController.doPrivileged(
new GetBooleanAction("sun.awt.disableMixing"));
}
return sunAwtDisableMixing.booleanValue();
}
/**
* Returns true if the native GTK libraries are available. The
* default implementation returns false, but UNIXToolkit overrides this
* method to provide a more specific answer.
*/
public boolean isNativeGTKAvailable() {
return false;
}
private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
public synchronized void setWindowDeactivationTime(Window w, long time) {
AppContext ctx = getAppContext(w);
WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
if (map == null) {
map = new WeakHashMap<Window, Long>();
ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
}
map.put(w, time);
}
public synchronized long getWindowDeactivationTime(Window w) {
AppContext ctx = getAppContext(w);
WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
if (map == null) {
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