From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:06:44 +0200
Subject: Adding upstream version 4:7.4.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 toolkit/test/accessibility/EventQueue.java | 140 +++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 toolkit/test/accessibility/EventQueue.java

(limited to 'toolkit/test/accessibility/EventQueue.java')

diff --git a/toolkit/test/accessibility/EventQueue.java b/toolkit/test/accessibility/EventQueue.java
new file mode 100644
index 000000000..b6f6c6415
--- /dev/null
+++ b/toolkit/test/accessibility/EventQueue.java
@@ -0,0 +1,140 @@
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you 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 http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+import java.util.LinkedList;
+
+/** The event queue singleton dispatches events received from OpenOffice.org
+    applications in a thread separate from the AWB main thread.
+
+    The queue of event objects, LinkedList<Runnable> The queue object will
+    also serve as lock for the consumer/producer type synchronization.
+*/
+class EventQueue
+    implements Runnable
+{
+    private boolean mbVerbose = false;
+    private boolean mbHandleDisposingEventsSynchronous = true;
+
+    public synchronized static EventQueue Instance ()
+    {
+        if (maInstance == null)
+            maInstance = new EventQueue ();
+        return maInstance;
+    }
+
+    public void addEvent (Runnable aEvent)
+    {
+        synchronized (maMonitor)
+        {
+            if (mbVerbose)
+                System.out.println ("queueing regular event " + aEvent);
+            maRegularQueue.addLast (aEvent);
+            maMonitor.notify ();
+        }
+    }
+
+
+    public void addDisposingEvent (Runnable aEvent)
+    {
+        if (mbHandleDisposingEventsSynchronous)
+            aEvent.run ();
+        else
+            synchronized (maMonitor)
+            {
+                if (mbVerbose)
+                    System.out.println ("queueing disposing event " + aEvent);
+                maDisposingQueue.addLast (aEvent);
+                maMonitor.notify ();
+            }
+    }
+
+
+    private EventQueue ()
+    {
+        maRegularQueue = new LinkedList<Runnable>();
+        maDisposingQueue = new LinkedList<Runnable>();
+        new Thread(this, "AWB.EventQueue").start();
+    }
+
+
+    /// This thread's main method: deliver all events
+    public void run()
+    {
+        // in an infinite loop, check for events to deliver, then
+        // wait on lock (which will be notified when new events arrive)
+        while( true )
+        {
+            Runnable aEvent = null;
+            do
+            {
+                synchronized (maMonitor)
+                {
+                    if (maDisposingQueue.size() > 0)
+                    {
+                        aEvent = maDisposingQueue.removeFirst();
+                        if (mbVerbose)
+                            System.out.println ("delivering disposing event " + aEvent);
+                    }
+                    else if (maRegularQueue.size() > 0)
+                    {
+                        aEvent = maRegularQueue.removeFirst();
+                        if (mbVerbose)
+                            System.out.println ("delivering regular event " + aEvent);
+                    }
+                    else
+                        aEvent = null;
+                }
+                if (aEvent != null)
+                {
+                    try
+                    {
+                        aEvent.run();
+                    }
+                    catch( Throwable e )
+                    {
+                        System.out.println(
+                            "caught exception during event delivery: " + e );
+                        e.printStackTrace();
+                    }
+                }
+            }
+            while( aEvent != null );
+
+            try
+            {
+                synchronized (maMonitor)
+                {
+                    maMonitor.wait();
+                }
+            }
+            catch (Exception e)
+            {
+                // can't wait? odd!
+                System.err.println("Can't wait!");
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private static EventQueue maInstance = null;
+    private final Object maMonitor = new Object();
+    private final LinkedList<Runnable> maRegularQueue;
+    private final LinkedList<Runnable> maDisposingQueue;
+}
+
+
-- 
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