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, 117 insertions, 0 deletions

diff --git a/framework/source/helper/ocomponentenumeration.cxx b/framework/source/helper/ocomponentenumeration.cxx
new file mode 100644
index 000000000..3d00f75e5
--- /dev/null
+++ b/framework/source/helper/ocomponentenumeration.cxx
@@ -0,0 +1,117 @@
+/* -*- 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 .
+ */
+
+#include <helper/ocomponentenumeration.hxx>
+
+#include <vcl/svapp.hxx>
+#include <sal/log.hxx>
+
+namespace framework{
+
+using namespace ::com::sun::star::container;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::uno;
+using namespace ::cppu;
+using namespace ::osl;
+
+//  constructor
+
+OComponentEnumeration::OComponentEnumeration( std::vector< css::uno::Reference< XComponent > >&& seqComponents )
+        :   m_nPosition     ( 0                             )   // 0 is the first position for a valid list and the right value for an invalid list to!
+        ,   m_seqComponents ( std::move(seqComponents)      )
+{}
+
+//  destructor
+
+OComponentEnumeration::~OComponentEnumeration()
+{
+    // Reset instance, free memory...
+    impl_resetObject();
+}
+
+//  XEventListener
+void SAL_CALL OComponentEnumeration::disposing( const EventObject& aEvent )
+{
+    SolarMutexGuard g;
+
+    // Safe impossible cases
+    // This method is not specified for all incoming parameters.
+    SAL_WARN_IF( !aEvent.Source.is(), "fwk", "OComponentEnumeration::disposing(): Invalid parameter detected!" );
+
+    // Reset instance to defaults, release references and free memory.
+    impl_resetObject();
+}
+
+//  XEnumeration
+sal_Bool SAL_CALL OComponentEnumeration::hasMoreElements()
+{
+    SolarMutexGuard g;
+
+    // First position in a valid list is 0.
+    // => The last one is getLength() - 1!
+    // m_nPosition's current value is the position for the next element, which will be return, if user call "nextElement()"
+    // => We have more elements if current position less than the length of the list!
+    return ( m_nPosition < static_cast<sal_uInt32>(m_seqComponents.size()) );
+}
+
+//  XEnumeration
+
+Any SAL_CALL OComponentEnumeration::nextElement()
+{
+    SolarMutexGuard g;
+
+    // If we have no elements or end of enumeration is arrived ...
+    if ( !hasMoreElements() )
+    {
+        // .. throw an exception!
+        throw NoSuchElementException();
+    }
+
+    // Else; Get next element from list ...
+    Any aComponent;
+    aComponent <<= m_seqComponents[m_nPosition];
+    // ... and step to next element!
+    ++m_nPosition;
+
+    // Return listitem.
+    return aComponent;
+}
+
+//  protected method
+
+void OComponentEnumeration::impl_resetObject()
+{
+    // Attention:
+    // Write this for multiple calls - NOT AT THE SAME TIME - but for more than one call again)!
+    // It exist two ways to call this method. From destructor and from disposing().
+    // I can't say, which one is the first. Normally the disposing-call - but other way...
+
+    // Delete list of components.
+    m_seqComponents.clear();
+    // Reset position in list.
+    // The list has no elements anymore. m_nPosition is normally the current position in list for nextElement!
+    // But a position of 0 in a list of 0 items is an invalid state. This constellation can't work in future.
+    // End of enumeration is arrived!
+    // (see hasMoreElements() for more details...)
+    m_nPosition = 0;
+}
+
+}       //  namespace framework
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */