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FlatPopupFactory: use method handles instead of reflection

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This commit is contained in:
Karl Tauber
2022-08-13 11:18:47 +02:00
parent 2dd75c4a64
commit fee7cf6265
1 changed files with 15 additions and 11 deletions
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26
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupFactory.java
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@@ -36,7 +36,9 @@ import java.awt.Window;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseEvent;
import java.lang.reflect.InvocationTargetException;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Method;
import javax.swing.JComponent;
import javax.swing.JLayeredPane;
@@ -64,8 +66,8 @@ import com.formdev.flatlaf.util.UIScale;
public class FlatPopupFactory
extends PopupFactory
{
private Method java8getPopupMethod;
private Method java9getPopupMethod;
private MethodHandle java8getPopupMethod;
private MethodHandle java9getPopupMethod;
@Override
public Popup getPopup( Component owner, Component contents, int x, int y )
@@ -192,23 +194,25 @@ public class FlatPopupFactory
{
try {
if( SystemInfo.isJava_9_orLater ) {
// Java 9: protected Popup getPopup( Component owner, Component contents, int x, int y, boolean isHeavyWeightPopup )
if( java9getPopupMethod == null ) {
java9getPopupMethod = PopupFactory.class.getDeclaredMethod(
"getPopup", Component.class, Component.class, int.class, int.class, boolean.class );
MethodType mt = MethodType.methodType( Popup.class, Component.class, Component.class, int.class, int.class, boolean.class );
java9getPopupMethod = MethodHandles.lookup().findVirtual( PopupFactory.class, "getPopup", mt );
}
return (Popup) java9getPopupMethod.invoke( this, owner, contents, x, y, true );
} else {
// Java 8
// Java 8: private Popup getPopup( Component owner, Component contents, int ownerX, int ownerY, int popupType )
if( java8getPopupMethod == null ) {
java8getPopupMethod = PopupFactory.class.getDeclaredMethod(
Method m = PopupFactory.class.getDeclaredMethod(
"getPopup", Component.class, Component.class, int.class, int.class, int.class );
java8getPopupMethod.setAccessible( true );
m.setAccessible( true );
java8getPopupMethod = MethodHandles.lookup().unreflect( m );
}
return (Popup) java8getPopupMethod.invoke( this, owner, contents, x, y, /*HEAVY_WEIGHT_POPUP*/ 2 );
}
} catch( NoSuchMethodException | SecurityException | IllegalAccessException | InvocationTargetException ex ) {
// ignore
return null;
} catch( Throwable ex ) {
// fallback
return super.getPopup( owner, contents, x, y );
}
}