com.formdev.flatlaf.ui.FlatNativeLinuxLibrary Maven / Gradle / Ivy
/*
* Copyright 2022 FormDev Software GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.formdev.flatlaf.ui;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.MouseEvent;
import java.awt.geom.AffineTransform;
import javax.swing.JDialog;
import javax.swing.JFrame;
import com.formdev.flatlaf.util.SystemInfo;
/**
* Native methods for Linux.
*
* Note: This is private API. Do not use!
*
* @author Karl Tauber
* @since 2.5
*/
class FlatNativeLinuxLibrary
{
private static int API_VERSION_LINUX = 3001;
/**
* Checks whether native library is loaded/available.
*
* Note: It is required to invoke this method before invoking any other
* method of this class. Otherwise, the native library may not be loaded.
*/
static boolean isLoaded() {
return SystemInfo.isLinux && FlatNativeLibrary.isLoaded( API_VERSION_LINUX );
}
// direction for _NET_WM_MOVERESIZE message
// see https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html
static final int MOVE = 8;
private static Boolean isXWindowSystem;
private static boolean isXWindowSystem() {
if( isXWindowSystem == null )
isXWindowSystem = Toolkit.getDefaultToolkit().getClass().getName().endsWith( ".XToolkit" );
return isXWindowSystem;
}
static boolean isWMUtilsSupported( Window window ) {
return hasCustomDecoration( window ) && isXWindowSystem() && isLoaded();
}
static boolean moveOrResizeWindow( Window window, MouseEvent e, int direction ) {
Point pt = scale( window, e.getLocationOnScreen() );
return xMoveOrResizeWindow( window, pt.x, pt.y, direction );
/*
try {
Class cls = Class.forName( "com.formdev.flatlaf.natives.jna.linux.X11WmUtils" );
java.lang.reflect.Method m = cls.getMethod( "xMoveOrResizeWindow", Window.class, int.class, int.class, int.class );
return (Boolean) m.invoke( null, window, pt.x, pt.y, direction );
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
*/
}
static boolean showWindowMenu( Window window, MouseEvent e ) {
Point pt = scale( window, e.getLocationOnScreen() );
return xShowWindowMenu( window, pt.x, pt.y );
/*
try {
Class cls = Class.forName( "com.formdev.flatlaf.natives.jna.linux.X11WmUtils" );
java.lang.reflect.Method m = cls.getMethod( "xShowWindowMenu", Window.class, int.class, int.class );
return (Boolean) m.invoke( null, window, pt.x, pt.y );
} catch (Exception ex) {
ex.printStackTrace();
return false;
}
*/
}
private static Point scale( Window window, Point pt ) {
AffineTransform transform = window.getGraphicsConfiguration().getDefaultTransform();
int x = (int) Math.round( pt.x * transform.getScaleX() );
int y = (int) Math.round( pt.y * transform.getScaleY() );
return new Point( x, y );
}
// X Window System
private static native boolean xMoveOrResizeWindow( Window window, int x, int y, int direction );
private static native boolean xShowWindowMenu( Window window, int x, int y );
private static boolean hasCustomDecoration( Window window ) {
return (window instanceof JFrame && JFrame.isDefaultLookAndFeelDecorated() && ((JFrame)window).isUndecorated()) ||
(window instanceof JDialog && JDialog.isDefaultLookAndFeelDecorated() && ((JDialog)window).isUndecorated());
}
}