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Carefully checking GTK version information, but only now for java <=8

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This commit is contained in:
Robinson 2021-03-11 22:19:41 +01:00
parent 751fd2c982
commit c37b89ef96
1 changed files with 40 additions and 6 deletions
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46
src/dorkbox/jna/linux/GtkCheck.java
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@ -16,8 +16,8 @@
package dorkbox.jna.linux; package dorkbox.jna.linux;
import dorkbox.javaFx.JavaFx; import dorkbox.javaFx.JavaFx;
import dorkbox.os.OS;
import dorkbox.swt.Swt; import dorkbox.swt.Swt;
import dorkbox.util.SwingUtil;
/** /**
* Accessor methods/logic for determining if GTK is already loaded by the Swing/JavaFX/SWT, or if GTK has been manually loaded via * Accessor methods/logic for determining if GTK is already loaded by the Swing/JavaFX/SWT, or if GTK has been manually loaded via
@ -89,7 +89,9 @@ class GtkCheck {
/** /**
* This method is agnostic w.r.t. how GTK is loaded, which can be manually loaded or loaded via JavaFX/SWT/Swing. * This method is agnostic w.r.t. how GTK is loaded, which can be manually loaded or loaded via JavaFX/SWT/Swing.
* *
* @return the version of GTK loaded. 0=no GTK loaded, 2=GTK2, 3=GTK3 * NOTE: this WILL NOT attempt to load swing, and will use reflection for JAVA <=8 to check GTK version info
*
* @return the version of GTK loaded. 0=no GTK loaded (or unknown), 2=GTK2, 3=GTK3
*/ */
public static public static
int getLoadedGtkVersion() { int getLoadedGtkVersion() {
@ -118,9 +120,41 @@ class GtkCheck {
} }
} }
// now check if swing has loaded GTK from the Look and Feel /*
return SwingUtil.getLoadedGtkVersion(); * Checks to see if GTK is loaded by Swing from the "Look and Feel", and if so - which version is loaded.
*
* NOTE: if the UI uses the 'getSystemLookAndFeelClassName' and is on Linux and it's the GtkLookAndFeel,
* this will cause GTK2 to get loaded FIRST, which will cause conflicts if one tries to use GTK3 (and it's GTK2)
*
* The **ONLY** issue we have is if WE are GTK3 and SWING is GTK2...
*/
// java 8 cannot load GTK3. But we can know if GTK was loaded yet or not
if (OS.javaVersion <= 8) {
try {
// Don't want to load the toolkit!!!
Class<?> toolkitClass = Class.forName("java.awt.Toolkit");
java.lang.reflect.Field kitField = toolkitClass.getDeclaredField("toolkit");
kitField.setAccessible(true);
Object toolkit = kitField.get(null);
if (toolkit != null) {
Class<?> unixTkClazz = Class.forName("sun.awt.UNIXToolkit");
if (unixTkClazz.isAssignableFrom(toolkit.getClass())) {
java.lang.reflect.Field field = unixTkClazz.getDeclaredField("nativeGTKLoaded");
field.setAccessible(true);
Boolean o = (Boolean) field.get(toolkit);
//noinspection UnnecessaryUnboxing
if (o != null && o.booleanValue()) {
// if gtk is loaded, it **must* be version 2, since java <=8 cannot load GTK3
return 2;
}
}
}
} catch (Throwable ignored) {
}
}
// don't know without forcing GTK to potentially load
return 0;
} }
} }