1 files changed, 147 insertions, 0 deletions
diff --git a/forms/source/helper/controlfeatureinterception.cxx b/forms/source/helper/controlfeatureinterception.cxx
new file mode 100644
index 000000000..091af550c
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+++ b/forms/source/helper/controlfeatureinterception.cxx
@@ -0,0 +1,147 @@
+/* -*- 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 <controlfeatureinterception.hxx>
+#include <urltransformer.hxx>
+#include <osl/diagnose.h>
+
+
+namespace frm
+{
+
+
+    using namespace ::com::sun::star::uno;
+    using namespace ::com::sun::star::frame;
+    using namespace ::com::sun::star::util;
+    using namespace ::com::sun::star::lang;
+
+    ControlFeatureInterception::ControlFeatureInterception( const Reference< XComponentContext >& _rxORB )
+        :m_pUrlTransformer( new UrlTransformer( _rxORB ) )
+    {
+    }
+
+
+    void ControlFeatureInterception::registerDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor )
+    {
+        if ( !_rxInterceptor.is() )
+        {
+            OSL_FAIL( "ControlFeatureInterception::registerDispatchProviderInterceptor: invalid interceptor!" );
+            return;
+        }
+
+        if ( m_xFirstDispatchInterceptor.is() )
+        {
+            // there is already an interceptor; the new one will become its master
+            _rxInterceptor->setSlaveDispatchProvider( m_xFirstDispatchInterceptor );
+            m_xFirstDispatchInterceptor->setMasterDispatchProvider( m_xFirstDispatchInterceptor );
+        }
+
+        // we are the master of the chain's first interceptor
+        m_xFirstDispatchInterceptor = _rxInterceptor;
+        m_xFirstDispatchInterceptor->setMasterDispatchProvider( nullptr );
+            // it's the first of the interceptor chain
+    }
+
+
+    void ControlFeatureInterception::releaseDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor )
+    {
+        if ( !_rxInterceptor.is() )
+        {
+            OSL_FAIL( "ControlFeatureInterception::releaseDispatchProviderInterceptor: invalid interceptor!" );
+            return;
+        }
+
+        Reference< XDispatchProviderInterceptor >  xChainWalk( m_xFirstDispatchInterceptor );
+
+        if ( m_xFirstDispatchInterceptor == _rxInterceptor )
+        {   // our chain will have a new first element
+            Reference< XDispatchProviderInterceptor >  xSlave( m_xFirstDispatchInterceptor->getSlaveDispatchProvider(), UNO_QUERY );
+            m_xFirstDispatchInterceptor = xSlave;
+        }
+        // do this before removing the interceptor from the chain as we won't know it's slave afterwards)
+
+        while ( xChainWalk.is() )
+        {
+            // walk along the chain of interceptors and look for the interceptor that has to be removed
+            Reference< XDispatchProviderInterceptor >  xSlave( xChainWalk->getSlaveDispatchProvider(), UNO_QUERY );
+
+            if ( xChainWalk == _rxInterceptor )
+            {
+                // old master may be an interceptor too
+                Reference< XDispatchProviderInterceptor >  xMaster( xChainWalk->getMasterDispatchProvider(), UNO_QUERY );
+
+                // unchain the interceptor that has to be removed
+                xChainWalk->setSlaveDispatchProvider( nullptr );
+                xChainWalk->setMasterDispatchProvider( nullptr );
+
+                // reconnect the chain
+                if ( xMaster.is() )
+                {
+                    xMaster->setSlaveDispatchProvider( xSlave );
+                }
+
+                // if somebody has registered the same interceptor twice, then we will remove
+                // it once per call ...
+                break;
+            }
+
+            xChainWalk = xSlave;
+        }
+    }
+
+
+    void ControlFeatureInterception::dispose()
+    {
+        // release all interceptors
+        Reference< XDispatchProviderInterceptor > xInterceptor( m_xFirstDispatchInterceptor );
+        m_xFirstDispatchInterceptor.clear();
+        while ( xInterceptor.is() )
+        {
+            // tell the interceptor it has a new (means no) predecessor
+            xInterceptor->setMasterDispatchProvider( nullptr );
+
+            // ask for its successor
+            Reference< XDispatchProvider > xSlave = xInterceptor->getSlaveDispatchProvider();
+            // and give it the new (means no) successoert
+            xInterceptor->setSlaveDispatchProvider( nullptr );
+
+            // start over with the next chain element
+            xInterceptor.set(xSlave, css::uno::UNO_QUERY);
+        }
+    }
+
+    Reference< XDispatch > ControlFeatureInterception::queryDispatch( const URL& _rURL )
+    {
+        Reference< XDispatch > xDispatcher;
+        if ( m_xFirstDispatchInterceptor.is() )
+            xDispatcher = m_xFirstDispatchInterceptor->queryDispatch( _rURL, OUString(), 0 );
+        return xDispatcher;
+    }
+
+
+    Reference< XDispatch > ControlFeatureInterception::queryDispatch( const char* _pAsciiURL )
+    {
+        return queryDispatch( m_pUrlTransformer->getStrictURLFromAscii( _pAsciiURL ) );
+    }
+
+
+} // namespace frm
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */