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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /include/comphelper/propagg.hxx
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- 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 INCLUDED_COMPHELPER_PROPAGG_HXX
+#define INCLUDED_COMPHELPER_PROPAGG_HXX
+
+#include <config_options.h>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyState.hpp>
+#include <com/sun/star/beans/XPropertiesChangeListener.hpp>
+#include <com/sun/star/beans/XVetoableChangeListener.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <comphelper/propstate.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+#include <map>
+#include <memory>
+#include <vector>
+
+
+//= property helper classes
+
+
+namespace comphelper
+{
+
+
+//= OPropertyAccessor
+//= internal helper class for OPropertyArrayAggregationHelper
+
+namespace internal
+{
+ struct OPropertyAccessor
+ {
+ sal_Int32 nOriginalHandle;
+ sal_Int32 nPos;
+ bool bAggregate;
+
+ OPropertyAccessor(sal_Int32 _nOriginalHandle, sal_Int32 _nPos, bool _bAggregate)
+ :nOriginalHandle(_nOriginalHandle) ,nPos(_nPos) ,bAggregate(_bAggregate) { }
+ OPropertyAccessor()
+ :nOriginalHandle(-1) ,nPos(-1) ,bAggregate(false) { }
+
+ bool operator==(const OPropertyAccessor& rOb) const { return nPos == rOb.nPos; }
+ bool operator <(const OPropertyAccessor& rOb) const { return nPos < rOb.nPos; }
+ };
+
+ typedef std::map< sal_Int32, OPropertyAccessor > PropertyAccessorMap;
+ typedef PropertyAccessorMap::const_iterator ConstPropertyAccessorMapIterator;
+}
+
+
+/**
+ * used as callback for an OPropertyArrayAggregationHelper
+ */
+class IPropertyInfoService
+{
+public:
+ /** get the preferred handle for the given property
+ @param _rName the property name
+ @return the handle the property should be referred by, or -1 if there are no
+ preferences for the given property
+ */
+ virtual sal_Int32 getPreferredPropertyId(const OUString& _rName) = 0;
+
+protected:
+ ~IPropertyInfoService() {}
+};
+
+/**
+ * used for implementing a cppu::IPropertyArrayHelper for classes
+ * aggregating property sets
+ */
+
+#define DEFAULT_AGGREGATE_PROPERTY_ID 10000
+
+class COMPHELPER_DLLPUBLIC OPropertyArrayAggregationHelper final : public ::cppu::IPropertyArrayHelper
+{
+ friend class OPropertySetAggregationHelper;
+
+ std::vector<css::beans::Property> m_aProperties;
+ internal::PropertyAccessorMap m_aPropertyAccessors;
+
+public:
+ /** construct the object.
+ @param _rProperties the properties of the object doing the aggregation. These properties
+ are used without any checks, so the caller has to ensure that the names and
+ handles are valid.
+ @param _rAggProperties the properties of the aggregate, usually got via a call to getProperties on the
+ XPropertySetInfo of the aggregate.
+ The names of the properties are used without any checks, so the caller has to ensure
+ that there are no doubles.
+ The handles are stored for later quick access, but the outside-handles the
+ aggregate properties get depend from the following two parameters.
+ @param _pInfoService
+ If not NULL, the object pointed to is used to calc handles which should be used
+ for referring the aggregate's properties from outside.
+ If one of the properties returned from the info service conflict with other handles
+ already present (e.g. through _rProperties), the property is handled as if -1 was returned.
+ If NULL (or, for a special property, a call to getPreferredPropertyId returns -1),
+ the aggregate property(ies) get a new handle which they can be referred by from outside.
+ @param _nFirstAggregateId
+ if the object is about to create new handles for the aggregate properties, it uses
+ id's ascending from this given id.
+ No checks are made if the handle range determined by _nFirstAggregateId conflicts with other
+ handles within _rProperties.
+ */
+ OPropertyArrayAggregationHelper(const css::uno::Sequence< css::beans::Property>& _rProperties,
+ const css::uno::Sequence< css::beans::Property>& _rAggProperties,
+ IPropertyInfoService* _pInfoService = nullptr,
+ sal_Int32 _nFirstAggregateId = DEFAULT_AGGREGATE_PROPERTY_ID);
+
+
+ /// inherited from IPropertyArrayHelper
+ virtual sal_Bool SAL_CALL fillPropertyMembersByHandle( OUString* _pPropName, sal_Int16* _pAttributes,
+ sal_Int32 _nHandle) override ;
+
+ /// inherited from IPropertyArrayHelper
+ virtual css::uno::Sequence< css::beans::Property> SAL_CALL getProperties() override;
+ /// inherited from IPropertyArrayHelper
+ virtual css::beans::Property SAL_CALL getPropertyByName(const OUString& _rPropertyName) override;
+
+ /// inherited from IPropertyArrayHelper
+ virtual sal_Bool SAL_CALL hasPropertyByName(const OUString& _rPropertyName) override ;
+ /// inherited from IPropertyArrayHelper
+ virtual sal_Int32 SAL_CALL getHandleByName(const OUString & _rPropertyName) override;
+ /// inherited from IPropertyArrayHelper
+ virtual sal_Int32 SAL_CALL fillHandles( /*out*/sal_Int32* _pHandles, const css::uno::Sequence< OUString >& _rPropNames ) override;
+
+ /** returns information about a property of the aggregate.
+ @param _pPropName points to a string to receive the property name. No name is returned if this is NULL.
+ @param _pOriginalHandle points to a sal_Int32 to receive the original property handle. No original handle is returned
+ if this is NULL.
+ @param _nHandle the handle of the property as got by, for instance, fillHandles
+
+ @return sal_True, if _nHandle marks an aggregate property, otherwise sal_False
+ */
+ bool fillAggregatePropertyInfoByHandle(OUString* _pPropName, sal_Int32* _pOriginalHandle,
+ sal_Int32 _nHandle) const;
+
+ /** returns information about a property given by handle
+ */
+ bool getPropertyByHandle( sal_Int32 _nHandle, css::beans::Property& _rProperty ) const;
+
+
+ enum class PropertyOrigin
+ {
+ Aggregate,
+ Delegator,
+ Unknown
+ };
+ /** prefer this one over the XPropertySetInfo of the aggregate!
+
+ <p>The reason is that OPropertyArrayAggregationHelper is the only instance which really knows
+ which properties of the aggregate are to be exposed. <br/>
+
+ For instance, some derivee of OPropertySetAggregationHelper may decide to create an
+ OPropertyArrayAggregationHelper which contains only a subset of the aggregate properties. This way,
+ some of the aggregate properties may be hidden to the public.<br/>
+
+ When using the XPropertySetInfo of the aggregate set to determine the existence of a property, then this
+ would return false positives.</p>
+ */
+ PropertyOrigin classifyProperty( const OUString& _rName );
+
+private:
+ const css::beans::Property* findPropertyByName(const OUString& _rName) const;
+};
+
+
+namespace internal
+{
+ class PropertyForwarder;
+}
+
+/**
+ * helper class for implementing the property-set-related interfaces
+ * for an object doin' aggregation
+ * supports at least XPropertySet and XMultiPropertySet
+ *
+ */
+class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OPropertySetAggregationHelper :public OPropertyStateHelper
+ ,public css::beans::XPropertiesChangeListener
+ ,public css::beans::XVetoableChangeListener
+{
+ friend class internal::PropertyForwarder;
+
+protected:
+ css::uno::Reference< css::beans::XPropertyState> m_xAggregateState;
+ css::uno::Reference< css::beans::XPropertySet> m_xAggregateSet;
+ css::uno::Reference< css::beans::XMultiPropertySet> m_xAggregateMultiSet;
+ css::uno::Reference< css::beans::XFastPropertySet> m_xAggregateFastSet;
+
+ std::unique_ptr<internal::PropertyForwarder> m_pForwarder;
+ bool m_bListening : 1;
+
+public:
+ OPropertySetAggregationHelper( ::cppu::OBroadcastHelper& rBHelper );
+
+ virtual css::uno::Any SAL_CALL queryInterface(const css::uno::Type& aType) override;
+
+// XEventListener
+ virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+// XFastPropertySet
+ virtual void SAL_CALL setFastPropertyValue(sal_Int32 nHandle, const css::uno::Any& aValue) override;
+ virtual css::uno::Any SAL_CALL getFastPropertyValue(sal_Int32 nHandle) override;
+
+// XPropertySet
+ virtual void SAL_CALL addPropertyChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener) override;
+ virtual void SAL_CALL addVetoableChangeListener(const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener) override;
+
+// XPropertiesChangeListener
+ virtual void SAL_CALL propertiesChange(const css::uno::Sequence< css::beans::PropertyChangeEvent >& evt) override;
+
+// XVetoableChangeListener
+ virtual void SAL_CALL vetoableChange(const css::beans::PropertyChangeEvent& aEvent) override;
+
+// XMultiPropertySet
+ virtual void SAL_CALL setPropertyValues(const css::uno::Sequence< OUString >& PropertyNames, const css::uno::Sequence< css::uno::Any >& Values) override;
+ virtual void SAL_CALL addPropertiesChangeListener(const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener) override;
+
+// XPropertyState
+ virtual css::beans::PropertyState SAL_CALL getPropertyState(const OUString& PropertyName) override;
+ virtual void SAL_CALL setPropertyToDefault(const OUString& PropertyName) override;
+ virtual css::uno::Any SAL_CALL getPropertyDefault(const OUString& aPropertyName) override;
+
+// OPropertySetHelper
+ /** still waiting to be overwritten ...
+ you <B>must<B/> use an OPropertyArrayAggregationHelper here, as the implementation strongly relies on this.
+ */
+ virtual ::cppu::IPropertyArrayHelper& SAL_CALL getInfoHelper() override = 0;
+
+ /** only implemented for "forwarded" properties, every other property must be handled
+ in the derivee, and will assert if passed herein
+ */
+ virtual sal_Bool SAL_CALL convertFastPropertyValue( css::uno::Any& _rConvertedValue, css::uno::Any& _rOldValue, sal_Int32 _nHandle, const css::uno::Any& _rValue ) override;
+
+ /** only implemented for "forwarded" properties, every other property must be handled
+ in the derivee, and will assert if passed herein
+ */
+ virtual void SAL_CALL setFastPropertyValue_NoBroadcast( sal_Int32 _nHandle, const css::uno::Any& _rValue ) override;
+
+protected:
+ virtual ~OPropertySetAggregationHelper() override;
+
+ virtual void SAL_CALL getFastPropertyValue(css::uno::Any& rValue, sal_Int32 nHandle) const override;
+ void disposing();
+
+ sal_Int32 getOriginalHandle( sal_Int32 _nHandle ) const;
+ OUString getPropertyName( sal_Int32 _nHandle ) const;
+
+ /** declares the property with the given (public) handle as one to be forwarded to the aggregate
+
+ Sometimes, you might want to <em>overwrite</em> properties at the aggregate. That is,
+ though the aggregate implements this property, and still is to hold the property value,
+ you want to do additional handling upon setting the property, but then forward the value
+ to the aggregate.
+
+ Use this method to declare such properties.
+
+ When a "forwarded property" is set from outside, the class first calls
+ <member>forwardingPropertyValue</member> for any preprocessing, then forwards the property
+ value to the aggregate, and then calls <member>forwardedPropertyValue</member>.
+
+ When you declare a property as "forwarded", the class takes care for some multi-threading
+ issues, for instance, it won't fire any property change notifications which result from
+ forwarding a property value, unless it's safe to do so (i.e. unless our mutex is
+ released).
+
+ @see forwardingPropertyValue
+ @see forwardedPropertyValue
+ */
+ void declareForwardedProperty( sal_Int32 _nHandle );
+
+ /** checks whether we're actually forwarding a property value to our aggregate
+
+ @see declareForwardedProperty
+ @see forwardingPropertyValue
+ @see forwardedPropertyValue
+ */
+ bool isCurrentlyForwardingProperty( sal_Int32 _nHandle ) const;
+
+ /** called immediately before a property value which is overwritten in this instance
+ is forwarded to the aggregate
+
+ @see declareForwardedProperty
+ @see forwardedPropertyValue
+ */
+ virtual void forwardingPropertyValue( sal_Int32 _nHandle );
+
+ /** called immediately after a property value which is overwritten in this instance
+ has been forwarded to the aggregate
+
+ @see declareForwardedProperty
+ @see forwardingPropertyValue
+ */
+ virtual void forwardedPropertyValue( sal_Int32 _nHandle );
+
+ /// must be called before aggregation, if aggregation is used
+ ///
+ /// @throws css::lang::IllegalArgumentException
+ void setAggregation(const css::uno::Reference< css::uno::XInterface >&);
+ void startListening();
+};
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPAGG_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */