Merge tag 'v2.3.28' into testing

[lgpl/argeo-commons.git] / swt / rcp / org.argeo.swt.specific.rcp / src / org / argeo / internal / swt / specific / osgi / SwtSpecificRcpActivator.java

diff --git a/swt/rcp/org.argeo.swt.specific.rcp/src/org/argeo/internal/swt/specific/osgi/SwtSpecificRcpActivator.java b/swt/rcp/org.argeo.swt.specific.rcp/src/org/argeo/internal/swt/specific/osgi/SwtSpecificRcpActivator.java
new file mode 100644 (file)
index 0000000..e74e109
--- /dev/null
+++ b/swt/rcp/org.argeo.swt.specific.rcp/src/org/argeo/internal/swt/specific/osgi/SwtSpecificRcpActivator.java
@@ -0,0 +1,75 @@
+package org.argeo.internal.swt.specific.osgi;
+
+import org.eclipse.swt.SWTError;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+
+public class SwtSpecificRcpActivator implements BundleActivator {
+       private static Display display;
+       private static Shell rootShell;
+       private static UiThread uiThread;
+
+       private static boolean debug = true;
+
+       @Override
+       public void start(BundleContext context) throws Exception {
+               if (display != null)
+                       throw new IllegalStateException("SWT display already exists");
+               uiThread = new UiThread();
+               uiThread.start();
+       }
+
+       @Override
+       public void stop(BundleContext context) throws Exception {
+               if (display == null)
+                       return; // TODO log issue
+               display.asyncExec(() -> rootShell.dispose());
+               display.wake();
+               uiThread.join(60 * 1000);
+               uiThread = null;
+               display = null;
+       }
+
+       static class UiThread extends Thread {
+
+               @Override
+               public void run() {
+                       boolean displayOwner = true;
+                       Display d = Display.getDefault();
+                       if (d.getThread() != UiThread.this) {
+                               displayOwner = false;
+                               // throw new IllegalStateException("There was already a default SWT display");
+                       }
+
+                       d.syncExec(() -> {
+                               try {
+                                       rootShell = new Shell(d);
+                               } catch (SWTError e) {
+                                       e.printStackTrace();
+                                       display.dispose();
+                                       return;
+                               }
+
+                               if (debug) {
+                                       rootShell.setLayout(new FillLayout());
+                                       new Label(rootShell, 0).setText("ROOT SHELL");
+                                       rootShell.pack();
+                                       rootShell.open();
+                               }
+                       });
+
+                       display = d;
+
+                       if (displayOwner) {
+                               while (!rootShell.isDisposed())
+                                       if (!display.readAndDispatch())
+                                               display.sleep();
+                               display.dispose();
+                       }
+               }
+       }
+}