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JavaCompatibility: use method handles instead of reflection

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This commit is contained in:
Karl Tauber
2022-08-12 11:20:42 +02:00
parent 5d167da55e
commit 10914083e6
1 changed files with 15 additions and 12 deletions
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27
flatlaf-core/src/main/java/com/formdev/flatlaf/util/JavaCompatibility.java
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@@ -19,8 +19,9 @@ package com.formdev.flatlaf.util;
import java.awt.FontMetrics; import java.awt.FontMetrics;
import java.awt.Graphics; import java.awt.Graphics;
import java.awt.Graphics2D; import java.awt.Graphics2D;
import java.lang.reflect.InvocationTargetException; import java.lang.invoke.MethodHandle;
import java.lang.reflect.Method; import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import javax.swing.JComponent; import javax.swing.JComponent;
/** /**
@@ -32,8 +33,8 @@ import javax.swing.JComponent;
*/ */
public class JavaCompatibility public class JavaCompatibility
{ {
private static Method drawStringUnderlineCharAtMethod; private static MethodHandle drawStringUnderlineCharAtMethod;
private static Method getClippedStringMethod; private static MethodHandle getClippedStringMethod;
/** /**
* Java 8: sun.swing.SwingUtilities2.drawStringUnderlineCharAt( JComponent c, * Java 8: sun.swing.SwingUtilities2.drawStringUnderlineCharAt( JComponent c,
@@ -51,9 +52,10 @@ public class JavaCompatibility
Class<?> cls = Class.forName( SystemInfo.isJava_9_orLater Class<?> cls = Class.forName( SystemInfo.isJava_9_orLater
? "javax.swing.plaf.basic.BasicGraphicsUtils" ? "javax.swing.plaf.basic.BasicGraphicsUtils"
: "sun.swing.SwingUtilities2" ); : "sun.swing.SwingUtilities2" );
drawStringUnderlineCharAtMethod = cls.getMethod( "drawStringUnderlineCharAt", SystemInfo.isJava_9_orLater MethodType mt = MethodType.methodType( void.class, SystemInfo.isJava_9_orLater
? new Class[] { JComponent.class, Graphics2D.class, String.class, int.class, float.class, float.class } ? new Class[] { JComponent.class, Graphics2D.class, String.class, int.class, float.class, float.class }
: new Class[] { JComponent.class, Graphics.class, String.class, int.class, int.class, int.class } ); : new Class[] { JComponent.class, Graphics.class, String.class, int.class, int.class, int.class } );
drawStringUnderlineCharAtMethod = MethodHandles.publicLookup().findStatic( cls, "drawStringUnderlineCharAt", mt );
} catch( Exception ex ) { } catch( Exception ex ) {
LoggingFacade.INSTANCE.logSevere( null, ex ); LoggingFacade.INSTANCE.logSevere( null, ex );
throw new RuntimeException( ex ); throw new RuntimeException( ex );
@@ -63,10 +65,10 @@ public class JavaCompatibility
try { try {
if( SystemInfo.isJava_9_orLater ) if( SystemInfo.isJava_9_orLater )
drawStringUnderlineCharAtMethod.invoke( null, c, g, text, underlinedIndex, (float) x, (float) y ); drawStringUnderlineCharAtMethod.invoke( c, (Graphics2D) g, text, underlinedIndex, (float) x, (float) y );
else else
drawStringUnderlineCharAtMethod.invoke( null, c, g, text, underlinedIndex, x, y ); drawStringUnderlineCharAtMethod.invoke( c, g, text, underlinedIndex, x, y );
} catch( IllegalAccessException | IllegalArgumentException | InvocationTargetException ex ) { } catch( Throwable ex ) {
LoggingFacade.INSTANCE.logSevere( null, ex ); LoggingFacade.INSTANCE.logSevere( null, ex );
throw new RuntimeException( ex ); throw new RuntimeException( ex );
} }
@@ -86,10 +88,11 @@ public class JavaCompatibility
Class<?> cls = Class.forName( SystemInfo.isJava_9_orLater Class<?> cls = Class.forName( SystemInfo.isJava_9_orLater
? "javax.swing.plaf.basic.BasicGraphicsUtils" ? "javax.swing.plaf.basic.BasicGraphicsUtils"
: "sun.swing.SwingUtilities2" ); : "sun.swing.SwingUtilities2" );
getClippedStringMethod = cls.getMethod( SystemInfo.isJava_9_orLater MethodType mt = MethodType.methodType( String.class, JComponent.class, FontMetrics.class, String.class, int.class );
getClippedStringMethod = MethodHandles.publicLookup().findStatic( cls, SystemInfo.isJava_9_orLater
? "getClippedString" ? "getClippedString"
: "clipStringIfNecessary", : "clipStringIfNecessary",
JComponent.class, FontMetrics.class, String.class, int.class ); mt );
} catch( Exception ex ) { } catch( Exception ex ) {
LoggingFacade.INSTANCE.logSevere( null, ex ); LoggingFacade.INSTANCE.logSevere( null, ex );
throw new RuntimeException( ex ); throw new RuntimeException( ex );
@@ -98,8 +101,8 @@ public class JavaCompatibility
} }
try { try {
return (String) getClippedStringMethod.invoke( null, c, fm, string, availTextWidth ); return (String) getClippedStringMethod.invoke( c, fm, string, availTextWidth );
} catch( IllegalAccessException | IllegalArgumentException | InvocationTargetException ex ) { } catch( Throwable ex ) {
LoggingFacade.INSTANCE.logSevere( null, ex ); LoggingFacade.INSTANCE.logSevere( null, ex );
throw new RuntimeException( ex ); throw new RuntimeException( ex );
} }