1 files changed, 156 insertions, 0 deletions
diff --git a/canvas/source/tools/propertysethelper.cxx b/canvas/source/tools/propertysethelper.cxx
new file mode 100644
index 000000000..24a07cb7d
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+++ b/canvas/source/tools/propertysethelper.cxx
@@ -0,0 +1,156 @@
+/* -*- 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 <sal/config.h>
+
+#include <string_view>
+
+#include <propertysethelper.hxx>
+#include <com/sun/star/beans/PropertyVetoException.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+
+using namespace ::com::sun::star;
+
+namespace canvas
+{
+    namespace
+    {
+        void throwUnknown( std::u16string_view aPropertyName )
+        {
+            throw beans::UnknownPropertyException(
+                OUString::Concat("PropertySetHelper: property ") +
+                aPropertyName + " not found."
+                );
+        }
+
+        void throwVeto( std::u16string_view aPropertyName )
+        {
+            throw beans::PropertyVetoException(
+                OUString::Concat("PropertySetHelper: property ") +
+                aPropertyName + " access was vetoed." );
+        }
+
+        struct EntryComparator
+        {
+            bool operator()( const PropertySetHelper::MapType::MapEntry& rLHS,
+                             const PropertySetHelper::MapType::MapEntry& rRHS )
+            {
+                return strcmp( rLHS.maKey,
+                               rRHS.maKey ) < 0;
+            }
+        };
+    }
+
+    PropertySetHelper::PropertySetHelper()
+    {
+    }
+
+    void PropertySetHelper::initProperties( InputMap&& rMap )
+    {
+        mpMap.reset();
+        maMapEntries = std::move(rMap);
+
+        std::sort( maMapEntries.begin(),
+                   maMapEntries.end(),
+                   EntryComparator() );
+
+        if( !maMapEntries.empty() )
+            mpMap.reset( new MapType(maMapEntries.data(),
+                                     maMapEntries.size(),
+                                     true) );
+    }
+
+    void PropertySetHelper::addProperties( const InputMap& rMap )
+    {
+        InputMap aMerged( maMapEntries );
+        aMerged.insert( aMerged.end(),
+                        rMap.begin(),
+                        rMap.end() );
+
+        initProperties( std::move(aMerged) );
+    }
+
+    bool PropertySetHelper::isPropertyName( const OUString& aPropertyName ) const
+    {
+        if (!mpMap)
+            return false;
+
+        Callbacks aDummy;
+        return mpMap->lookup( aPropertyName,
+                              aDummy );
+    }
+
+    uno::Reference< beans::XPropertySetInfo > PropertySetHelper::getPropertySetInfo() const
+    {
+        // we're a stealth property set
+        return uno::Reference< beans::XPropertySetInfo >();
+    }
+
+    void PropertySetHelper::setPropertyValue( const OUString& aPropertyName,
+                                              const uno::Any&        aValue )
+    {
+        Callbacks aCallbacks;
+        if (!mpMap || !mpMap->lookup(aPropertyName, aCallbacks))
+        {
+            throwUnknown( aPropertyName );
+        }
+
+        if (!aCallbacks.setter)
+            throwVeto( aPropertyName );
+
+        aCallbacks.setter(aValue);
+    }
+
+    uno::Any PropertySetHelper::getPropertyValue( const OUString& aPropertyName ) const
+    {
+        Callbacks aCallbacks;
+        if (!mpMap || !mpMap->lookup(aPropertyName, aCallbacks))
+        {
+            throwUnknown( aPropertyName );
+        }
+
+        if (aCallbacks.getter)
+            return aCallbacks.getter();
+
+        // TODO(Q1): subtlety, empty getter method silently returns
+        // the empty any
+        return uno::Any();
+    }
+
+    void PropertySetHelper::addPropertyChangeListener( const OUString&                                  aPropertyName,
+                                                       const uno::Reference< beans::XPropertyChangeListener >& /*xListener*/ )
+    {
+        // check validity of property, but otherwise ignore the
+        // request
+        if( !isPropertyName( aPropertyName ) )
+            throwUnknown( aPropertyName );
+    }
+
+    void PropertySetHelper::addVetoableChangeListener( const OUString&                                  aPropertyName,
+                                                       const uno::Reference< beans::XVetoableChangeListener >& /*xListener*/ )
+    {
+        // check validity of property, but otherwise ignore the
+        // request
+        if( !isPropertyName( aPropertyName ) )
+            throwUnknown( aPropertyName );
+    }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */