tdf#108642 load accessibility children faster

Reduces the cost of repeatedly iterating over the page objects, by
adding a new XAccessibleContext3 interface to return accesibility
children in one call.

This takes the load time from 5.6s to 3.2s.

Change-Id: Ifcc20fa7e7ab8ad50417073882c8c3a2405d1eaa
Reviewed-on: https://gerrit.libreoffice.org/83850
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 46 insertions, 0 deletions

diff --git a/offapi/UnoApi_offapi.mk b/offapi/UnoApi_offapi.mk
index 81dbf3c3441b..12ab8e2057e9 100644
--- a/offapi/UnoApi_offapi.mk
+++ b/offapi/UnoApi_offapi.mk
@@ -1634,6 +1634,7 @@ $(eval $(call gb_UnoApi_add_idlfiles,offapi,com/sun/star/accessibility,\
 	XAccessibleComponent \
 	XAccessibleContext \
 	XAccessibleContext2 \
+	XAccessibleContext3 \
 	XAccessibleEditableText \
 	XAccessibleEventBroadcaster \
 	XAccessibleEventListener \
diff --git a/offapi/com/sun/star/accessibility/XAccessibleContext3.idl b/offapi/com/sun/star/accessibility/XAccessibleContext3.idl
new file mode 100644
index 000000000000..8bc4dee3d1f0
--- /dev/null
+++ b/offapi/com/sun/star/accessibility/XAccessibleContext3.idl
@@ -0,0 +1,45 @@
+/* -*- 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 __com_sun_star_accessibility_XAccessibleContext3_idl__
+#define __com_sun_star_accessibility_XAccessibleContext3_idl__
+
+module com { module sun { module star { module accessibility {
+
+ interface XAccessible;
+
+/** Implement this interface to speed up operations when iterating over large amounts of children.
+ *
+    @since LibreOffice 6.4
+*/
+interface XAccessibleContext3 : ::com::sun::star::uno::XInterface
+{
+    /** Return the children.
+
+        <p>The order in which the children are enumerated is implementation
+        dependent.</p>
+    */
+    sequence<XAccessible> getAccessibleChildren();
+};
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */