Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/include/comphelper/accessibleeventnotifier.hxx b/include/comphelper/accessibleeventnotifier.hxx
new file mode 100644
index 000000000..75828cda6
--- /dev/null
+++ b/include/comphelper/accessibleeventnotifier.hxx
@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 .
+ */
+
+#ifndef INCLUDED_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno { class XInterface; }
+namespace com::sun::star::uno { template <class interface_type> class Reference; }
+namespace com::sun::star::accessibility { class XAccessibleEventListener; }
+namespace com::sun::star::accessibility { struct AccessibleEventObject; }
+
+namespace comphelper {
+
+class COMPHELPER_DLLPUBLIC AccessibleEventNotifier
+{
+public:
+    typedef sal_uInt32 TClientId;
+
+public:
+    AccessibleEventNotifier() = delete;
+    ~AccessibleEventNotifier() = delete;
+    AccessibleEventNotifier( const AccessibleEventNotifier& ) = delete;
+    AccessibleEventNotifier& operator=( const AccessibleEventNotifier& ) = delete;
+
+    /** registers a client of this class, means a broadcaster of AccessibleEvents
+
+        <p>No precaution is taken to care for disposal of this component. When the component
+        dies, it <b>must</b> call <member>revokeClient</member> or <member>revokeClientNotifyDisposing</member>
+        explicitly itself.</p>
+    */
+    static TClientId registerClient();
+
+    /** revokes a broadcaster of AccessibleEvents
+
+        <p>Note that no disposing event is fired when you use this method, the client is simply revoked.
+        You can for instance revoke a client if the last listener for it is revoked, but the client
+        itself is not disposed.<br/>
+        When the client is disposed, you should prefer <member>revokeClientNotifyDisposing</member></p>
+
+        <p>Any possibly pending events for this client are removed from the queue.</p>
+
+        @seealso revokeClientNotifyDisposing
+    */
+    static void revokeClient( const TClientId _nClient );
+
+    /** revokes a client, with additionally notifying a disposing event to all listeners registered for
+        this client
+
+        <p>Any other possibly pending events for this client are removed from the queue</p>
+
+        @param _nClient
+            the id of the client which should be revoked
+        @param _rxEventSource
+            the source to be notified together with the <member scope="com.sun.star.lang">XComponent::disposing</member>
+            call.
+    */
+    static void revokeClientNotifyDisposing(
+        const TClientId _nClient,
+        const css::uno::Reference< css::uno::XInterface >& _rxEventSource );
+
+    /** registers a listener for the given client
+
+        @param _nClient
+            the id of the client for which a listener should be registered
+        @return
+            the number of event listeners currently registered for this client
+    */
+    static sal_Int32 addEventListener(
+        const TClientId _nClient,
+        const css::uno::Reference< css::accessibility::XAccessibleEventListener >& _rxListener );
+
+    /** revokes a listener for the given client
+
+        @param _nClient
+            the id of the client for which a listener should be revoked
+        @return
+            the number of event listeners currently registered for this client
+    */
+    static sal_Int32 removeEventListener(
+        const TClientId _nClient,
+        const css::uno::Reference< css::accessibility::XAccessibleEventListener >& _rxListener );
+
+    /** adds an event, which is to be broadcasted, to the queue
+
+        @param _nClient
+            the id of the client which needs to broadcast the event
+    */
+    static void addEvent(
+        const TClientId _nClient,
+        const css::accessibility::AccessibleEventObject& _rEvent );
+
+};
+
+}   // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */