99 lines
2.9 KiB
Java
99 lines
2.9 KiB
Java
/*
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* Copyright 2021 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.swt;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.widgets.Display;
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import dorkbox.jna.rendering.ProviderType;
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import dorkbox.jna.rendering.Renderer;
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import dorkbox.os.OS;
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public class SwtProvider implements Renderer {
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private static Display currentDisplay = null;
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private static Thread currentDisplayThread = null;
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static {
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// we MUST save this on init, otherwise it is "null" when methods are run from the swing EDT.
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currentDisplay = org.eclipse.swt.widgets.Display.getCurrent();
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currentDisplayThread = currentDisplay.getThread();
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}
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@Override
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public
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boolean isSupported() {
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// versions of SWT older than v4.4, are INCOMPATIBLE with us.
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// Of note, v4.3 is the "last released" version of SWT by eclipse AND IT WILL NOT WORK!!
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// for NEWER versions of SWT via maven, use http://maven-eclipse.github.io/maven
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return SWT.getVersion() > 4430;
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}
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@Override
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public
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ProviderType getType() {
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return ProviderType.SWT;
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}
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@Override
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public
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boolean alreadyRunning() {
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// ONLY true for SWT. JavaFX/etc are checked elsewhere
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return true;
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}
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@Override
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public
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boolean isEventThread() {
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return Thread.currentThread() == currentDisplayThread;
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}
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@Override
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public
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int getGtkVersion() {
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if (!OS.isLinux()) {
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return 0;
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}
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// Swt has a property that tells us the version information
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// "org.eclipse.swt.internal.gtk.version=3.12.2"
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// Only possible Java9+ (so our case, Java11+ since 9 is no longer available, 11 is officially LTS)
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String version = OS.getProperty("org.eclipse.swt.internal.gtk.version", "2");
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if ("3".equals(version) || version.startsWith("3.")) {
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return 3;
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} else {
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return 2;
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}
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}
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@Override
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public
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boolean dispatch(final Runnable runnable) {
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if (isEventThread()) {
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// Run directly on the SWT event thread. If it's not on the dispatch thread, we will use the DEFAULT GTK to put it there.
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// We do not need to dispatch manually onto swt??
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runnable.run();
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// we only directly run if we are SWT, and in SWTs event thread
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return true;
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}
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// let the default handler manage it
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return false;
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}
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}
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