1 files changed, 182 insertions, 0 deletions
diff --git a/filter/source/config/cache/cacheupdatelistener.cxx b/filter/source/config/cache/cacheupdatelistener.cxx
new file mode 100644
index 000000000..c613d0549
--- /dev/null
+++ b/filter/source/config/cache/cacheupdatelistener.cxx
@@ -0,0 +1,182 @@
+/* -*- 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 "cacheupdatelistener.hxx"
+#include "configflush.hxx"
+
+#include <com/sun/star/util/XChangesNotifier.hpp>
+#include <com/sun/star/util/XRefreshable.hpp>
+#include <unotools/configpaths.hxx>
+#include <rtl/ustring.hxx>
+#include <comphelper/processfactory.hxx>
+#include <utility>
+
+
+namespace filter::config{
+
+CacheUpdateListener::CacheUpdateListener(FilterCache &rFilterCache,
+                                         css::uno::Reference< css::uno::XInterface > xConfigAccess,
+                                         FilterCache::EItemType eConfigType)
+    : m_rCache(rFilterCache)
+    , m_xConfig(std::move(xConfigAccess))
+    , m_eConfigType(eConfigType)
+{
+}
+
+CacheUpdateListener::~CacheUpdateListener()
+{
+}
+
+void CacheUpdateListener::startListening()
+{
+    // SAFE ->
+    std::unique_lock aLock(m_aMutex);
+    css::uno::Reference< css::util::XChangesNotifier > xNotifier(m_xConfig, css::uno::UNO_QUERY);
+    aLock.unlock();
+    // <- SAFE
+
+    if (!xNotifier.is())
+        return;
+
+    css::uno::Reference< css::util::XChangesListener > xThis(this);
+    xNotifier->addChangesListener(xThis);
+}
+
+
+void CacheUpdateListener::stopListening()
+{
+    // SAFE ->
+    std::unique_lock aLock(m_aMutex);
+    css::uno::Reference< css::util::XChangesNotifier > xNotifier(m_xConfig, css::uno::UNO_QUERY);
+    aLock.unlock();
+    // <- SAFE
+
+    if (!xNotifier.is())
+        return;
+
+    css::uno::Reference< css::util::XChangesListener > xThis(this);
+    xNotifier->removeChangesListener(xThis);
+}
+
+
+void SAL_CALL  CacheUpdateListener::changesOccurred(const css::util::ChangesEvent& aEvent)
+{
+    // SAFE ->
+    std::unique_lock aLock(m_aMutex);
+
+    // disposed ?
+    if ( ! m_xConfig.is())
+        return;
+
+    FilterCache::EItemType                             eType = m_eConfigType;
+
+    aLock.unlock();
+    // <- SAFE
+
+    std::vector<OUString> lChangedItems;
+    sal_Int32    c = aEvent.Changes.getLength();
+    sal_Int32    i = 0;
+
+    for (i=0; i<c; ++i)
+    {
+        const css::util::ElementChange& aChange = aEvent.Changes[i];
+
+        OUString sOrgPath ;
+        OUString sTempPath;
+
+        OUString sProperty;
+        OUString sNode    ;
+        OUString sLocale  ;
+
+        /*  at least we must be able to retrieve 2 path elements
+            But sometimes the original path can contain 3 of them ... in case
+            a localized value was changed.
+            =>
+            1) Filters/Filter["filtername"]/Property
+            2) Filters/Filter["filtername"]/LocalizedProperty/Locale
+        */
+
+        aChange.Accessor >>= sOrgPath;
+        if ( ! ::utl::splitLastFromConfigurationPath(sOrgPath, sTempPath, sLocale))
+            continue;
+        sOrgPath = sTempPath;
+        if ( ! ::utl::splitLastFromConfigurationPath(sOrgPath, sTempPath, sProperty))
+        {
+            sNode     = sLocale;
+            sProperty.clear();
+            sLocale.clear();
+        }
+        else
+        {
+            sOrgPath = sTempPath;
+            if ( ! ::utl::splitLastFromConfigurationPath(sOrgPath, sTempPath, sNode))
+            {
+                sNode     = sProperty;
+                sProperty = sLocale;
+                sLocale.clear();
+            }
+        }
+
+        if ( sNode.isEmpty() )
+            continue;
+
+        auto pIt = ::std::find(lChangedItems.cbegin(), lChangedItems.cend(), sNode);
+        if (pIt == lChangedItems.cend())
+            lChangedItems.push_back(sNode);
+    }
+
+    bool                     bNotifyRefresh = false;
+    for (auto const& changedItem : lChangedItems)
+    {
+        try
+        {
+            m_rCache.refreshItem(eType, changedItem);
+        }
+        catch(const css::container::NoSuchElementException&)
+            {
+                // can be ignored! Because we must be aware that
+                // sItem was removed from the configuration and we forced an update of the cache.
+                // But we know, that the cache is up-to-date know and has thrown this exception afterwards .-)
+            }
+        // NO FLUSH! Otherwise we start a never ending story here .-)
+        bNotifyRefresh = true;
+    }
+
+    // notify sfx cache about the changed filter cache .-)
+    if (bNotifyRefresh)
+    {
+        rtl::Reference< ConfigFlush > xRefreshBroadcaster = new ConfigFlush();
+        xRefreshBroadcaster->refresh();
+    }
+}
+
+
+void SAL_CALL CacheUpdateListener::disposing(const css::lang::EventObject& aEvent)
+{
+    // SAFE ->
+    std::unique_lock aLock(m_aMutex);
+    if (aEvent.Source == m_xConfig)
+        m_xConfig.clear();
+    // <- SAFE
+}
+
+} // namespace filter::config
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */