[574644] Support direct drag&drop of Auto-Launch-Installer Button

https://bugs.eclipse.org/bugs/show_bug.cgi?id=574644

Change-Id: I5f48f5687610205036d74e6a9579842264796c63

plugins/org.eclipse.oomph.setup.installer/src/org/eclipse/oomph/setup/internal/installer/Installer.java

@@ -360,7 +360,7 @@ public boolean handleMissingIndex(Shell shell)
 
   public void runEventLoop(Shell shell)
   {
-    // Use our own even loop so we can process delayed events.
+    // Use our own event loop so we can process delayed events.
     // This ensures that we do not process delayed events while any other modal dialog is in its own event loop.
     Display display = shell.getDisplay();
     while (!shell.isDisposed())

plugins/org.eclipse.oomph.setup.ui/src/org/eclipse/oomph/setup/ui/SetupTransferSupport.java

@@ -1,12 +1,13 @@
 /*
- * Copyright (c) 2016 Ed Merks (Berlin, Germany) and others.
+ * Copyright (c) 2016, 2021 Ed Merks (Berlin, Germany) and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v2.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v20.html
  *
  * Contributors:
  *    Eike Stepper - initial API and implementation
+ *    Hannes Wellmann - Bug 574644: Support direct drag&drop of Auto-Launch-Installer Button
  */
 package org.eclipse.oomph.setup.ui;
 
@@ -56,6 +57,8 @@
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * @author Ed Merks
@@ -409,9 +412,41 @@ public void doExecute()
 
 class LoadResourceCommand extends ResourceCommand
 {
+  private static final Pattern AUTO_LAUNCHER_WEBSITE = Pattern.compile("^https?://www\\.eclipse\\.org/setups/installer/\\?"); //$NON-NLS-1$
+
+  private static final Pattern SETUP_URL_PARAMETER = Pattern.compile("url=([^&]+)"); //$NON-NLS-1$
+
+  private static URI extractSetupURLIfAutoLauncherURL(URI uri)
+  {
+    if (AUTO_LAUNCHER_WEBSITE.matcher(uri.toString()).find() && uri.hasQuery())
+    {
+      Matcher matcher = SETUP_URL_PARAMETER.matcher(uri.query());
+      if (matcher.find())
+      {
+        String setupURL = matcher.group(1);
+        return URI.createURI(setupURL);
+      }
+    }
+    return uri;
+  }
+
+  private static Collection<?> extractSetupURLsIfAutoLauncherURLs(Collection<?> collection)
+  {
+    if (collection == null)
+    {
+      return collection;
+    }
+    Collection<Object> copy = new ArrayList<Object>(collection.size());
+    for (Object object : collection)
+    {
+      copy.add(object instanceof URI ? extractSetupURLIfAutoLauncherURL((URI)object) : object);
+    }
+    return copy;
+  }
+
   protected LoadResourceCommand(EditingDomain domain, Collection<?> collection)
   {
-    super(domain, collection);
+    super(domain, extractSetupURLsIfAutoLauncherURLs(collection));
   }
 
   @Override