From 77279721996247b86e1106f4eac907ed48a3f7f4 Mon Sep 17 00:00:00 2001
From: Lorenzo Bettini <lorenzo.bettini@gmail.com>
Date: Fri, 19 Jan 2024 15:15:58 +0100
Subject: [PATCH] avoid busy and possibly infinite loop in JavaEditorExtension

Maybe due to a bug in Platform not correctly closing or saving editors.
---
 .../tests/builder/JavaEditorExtension.xtend   | 11 ++-
 .../tests/builder/JavaEditorExtension.java    | 97 ++++++++++++-------
 2 files changed, 70 insertions(+), 38 deletions(-)

diff --git a/org.eclipse.xtend.ide.tests/src/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.xtend b/org.eclipse.xtend.ide.tests/src/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.xtend
index fc77642dcd0..1dbf7b23e9b 100644
--- a/org.eclipse.xtend.ide.tests/src/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.xtend
+++ b/org.eclipse.xtend.ide.tests/src/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.xtend
@@ -100,13 +100,22 @@ class JavaEditorExtension {
 				}
 			], eventMask)
 		producer.apply
-		while (!changed.get) {
+		var retries = 30
+		while (!changed.get && retries-- > 0) {
 			if (Display.getCurrent() !== null) {
 				while (Display.getDefault().readAndDispatch()) {
 					// process queued ui events
 				}
 			}
+			if (!changed.get) {
+				if (VERBOSE) {
+					println('''sleeping, left retries: «retries»''')
+				}
+				Thread.sleep(100)
+			}
 		}
+		if (!changed.get)
+			throw new AssertionError("No event has been received")
 		if (VERBOSE) {
 			println('''end waiting for an element changed event: «eventMask»''')
 		}
diff --git a/org.eclipse.xtend.ide.tests/xtend-gen/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.java b/org.eclipse.xtend.ide.tests/xtend-gen/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.java
index 88c5f8f128c..0d767bc4d17 100644
--- a/org.eclipse.xtend.ide.tests/xtend-gen/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.java
+++ b/org.eclipse.xtend.ide.tests/xtend-gen/org/eclipse/xtend/ide/tests/builder/JavaEditorExtension.java
@@ -109,49 +109,72 @@ public String waitForPostChangeEvent(final Procedure0 producer) {
   }
 
   public String waitForElementChangedEvent(final int eventMask, final Procedure0 producer) {
-    String _xblockexpression = null;
-    {
-      if ((JavaEditorExtension.VERBOSE).booleanValue()) {
-        StringConcatenation _builder = new StringConcatenation();
-        _builder.append("start waiting for an element changed event: ");
-        _builder.append(eventMask);
-        InputOutput.<String>println(_builder.toString());
-      }
-      final AtomicBoolean changed = new AtomicBoolean(false);
-      final IElementChangedListener _function = new IElementChangedListener() {
-        @Override
-        public void elementChanged(final ElementChangedEvent it) {
-          JavaCore.removeElementChangedListener(this);
-          boolean _get = changed.get();
-          boolean _not = (!_get);
-          if (_not) {
-            changed.set(true);
-            if ((JavaEditorExtension.VERBOSE).booleanValue()) {
-              InputOutput.<ElementChangedEvent>println(it);
+    try {
+      String _xblockexpression = null;
+      {
+        if ((JavaEditorExtension.VERBOSE).booleanValue()) {
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("start waiting for an element changed event: ");
+          _builder.append(eventMask);
+          InputOutput.<String>println(_builder.toString());
+        }
+        final AtomicBoolean changed = new AtomicBoolean(false);
+        final IElementChangedListener _function = new IElementChangedListener() {
+          @Override
+          public void elementChanged(final ElementChangedEvent it) {
+            JavaCore.removeElementChangedListener(this);
+            boolean _get = changed.get();
+            boolean _not = (!_get);
+            if (_not) {
+              changed.set(true);
+              if ((JavaEditorExtension.VERBOSE).booleanValue()) {
+                InputOutput.<ElementChangedEvent>println(it);
+              }
             }
           }
-        }
-      };
-      JavaCore.addElementChangedListener(_function, eventMask);
-      producer.apply();
-      while ((!changed.get())) {
-        Display _current = Display.getCurrent();
-        boolean _tripleNotEquals = (_current != null);
-        if (_tripleNotEquals) {
-          while (Display.getDefault().readAndDispatch()) {
+        };
+        JavaCore.addElementChangedListener(_function, eventMask);
+        producer.apply();
+        int retries = 30;
+        while (((!changed.get()) && (retries-- > 0))) {
+          {
+            Display _current = Display.getCurrent();
+            boolean _tripleNotEquals = (_current != null);
+            if (_tripleNotEquals) {
+              while (Display.getDefault().readAndDispatch()) {
+              }
+            }
+            boolean _get = changed.get();
+            boolean _not = (!_get);
+            if (_not) {
+              if ((JavaEditorExtension.VERBOSE).booleanValue()) {
+                StringConcatenation _builder_1 = new StringConcatenation();
+                _builder_1.append("sleeping, left retries: ");
+                _builder_1.append(retries);
+                InputOutput.<String>println(_builder_1.toString());
+              }
+              Thread.sleep(100);
+            }
           }
         }
+        boolean _get = changed.get();
+        boolean _not = (!_get);
+        if (_not) {
+          throw new AssertionError("No event has been received");
+        }
+        String _xifexpression = null;
+        if ((JavaEditorExtension.VERBOSE).booleanValue()) {
+          StringConcatenation _builder_1 = new StringConcatenation();
+          _builder_1.append("end waiting for an element changed event: ");
+          _builder_1.append(eventMask);
+          _xifexpression = InputOutput.<String>println(_builder_1.toString());
+        }
+        _xblockexpression = _xifexpression;
       }
-      String _xifexpression = null;
-      if ((JavaEditorExtension.VERBOSE).booleanValue()) {
-        StringConcatenation _builder_1 = new StringConcatenation();
-        _builder_1.append("end waiting for an element changed event: ");
-        _builder_1.append(eventMask);
-        _xifexpression = InputOutput.<String>println(_builder_1.toString());
-      }
-      _xblockexpression = _xifexpression;
+      return _xblockexpression;
+    } catch (Throwable _e) {
+      throw Exceptions.sneakyThrow(_e);
     }
-    return _xblockexpression;
   }
 
   public ITextEditor openJavaEditor(final String fileName) {