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prrace 2026-01-26 21:28:39 -08:00
parent 12570be64a
commit 9219dda625
1 changed files with 12 additions and 39 deletions
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51
src/java.desktop/share/classes/sun/swing/DefaultLookup.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2003, 2026, 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
@ -29,7 +29,6 @@ import java.awt.Insets;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.ComponentUI;
import sun.awt.AppContext;
/**
* DefaultLookup provides a way to customize the lookup done by the
@ -44,17 +43,9 @@ import sun.awt.AppContext;
* @author Scott Violet
*/
public class DefaultLookup {
/**
* Key used to store DefaultLookup for AppContext.
*/
private static final Object DEFAULT_LOOKUP_KEY = new
StringBuffer("DefaultLookup");
/**
* Thread that last asked for a default.
*/
private static Thread currentDefaultThread;
/**
* DefaultLookup for last thread.
* DefaultLookup currently set.
*/
private static DefaultLookup currentDefaultLookup;
@ -63,28 +54,24 @@ public class DefaultLookup {
*/
private static boolean isLookupSet;
/**
* Sets the DefaultLookup instance to use for the current
* <code>AppContext</code>. Null implies the UIManager should be
* used.
* Sets the DefaultLookup instance to use.
* Null implies the UIManager should be used.
*/
public static void setDefaultLookup(DefaultLookup lookup) {
synchronized(DefaultLookup.class) {
if (!isLookupSet && lookup == null) {
// Null was passed in, and no one has invoked setDefaultLookup
// Null was passed in, and no one has previously invoked setDefaultLookup
// with a non-null value, we don't need to do anything.
return;
}
else if (lookup == null) {
// null was passed in, but someone has invoked setDefaultLookup
// null was passed in, but someone has previously invoked setDefaultLookup
// with a non-null value, use an instance of DefaultLookup
// which will fallback to UIManager.
lookup = new DefaultLookup();
}
isLookupSet = true;
AppContext.getAppContext().put(DEFAULT_LOOKUP_KEY, lookup);
currentDefaultThread = Thread.currentThread();
currentDefaultLookup = lookup;
}
}
@ -98,27 +85,13 @@ public class DefaultLookup {
// No one has set a valid DefaultLookup, use UIManager.
return UIManager.get(key, c.getLocale());
}
Thread thisThread = Thread.currentThread();
DefaultLookup lookup;
synchronized(DefaultLookup.class) {
// See if we've already cached the DefaultLookup for this thread,
// and use it if we have.
if (thisThread == currentDefaultThread) {
// It is cached, use it.
lookup = currentDefaultLookup;
}
else {
// Not cached, get the DefaultLookup to use from the AppContext
lookup = (DefaultLookup)AppContext.getAppContext().get(
DEFAULT_LOOKUP_KEY);
if (lookup == null) {
// Fallback to DefaultLookup, which will redirect to the
// UIManager.
lookup = new DefaultLookup();
AppContext.getAppContext().put(DEFAULT_LOOKUP_KEY, lookup);
}
// Cache the values to make the next lookup easier.
currentDefaultThread = thisThread;
lookup = currentDefaultLookup;
if (lookup == null) {
// Fallback to DefaultLookup, which will redirect to the
// UIManager.
lookup = new DefaultLookup();
currentDefaultLookup = lookup;
}
}