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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_ACCESSIBLEWRAPPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLEWRAPPER_HXX
+
+#include <config_options.h>
+#include <sal/config.h>
+
+#include <map>
+
+#include <comphelper/proxyaggregation.hxx>
+#include <com/sun/star/accessibility/XAccessible.hpp>
+#include <com/sun/star/accessibility/XAccessibleContext.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <comphelper/uno3.hxx>
+#include <cppuhelper/interfacecontainer.h>
+#include <comphelper/accessibleeventnotifier.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace comphelper
+{
+
+
+ //= OAccessibleWrapper
+
+
+ class OAccessibleContextWrapper;
+ class OWrappedAccessibleChildrenManager;
+
+ struct OAccessibleWrapper_Base :
+ public ::cppu::ImplHelper1 < css::accessibility::XAccessible >
+ {
+ protected:
+ ~OAccessibleWrapper_Base() {}
+ };
+
+ /** a class which aggregates a proxy for an XAccessible, and wrapping the context returned by this
+ XAccessible.
+ */
+ class COMPHELPER_DLLPUBLIC OAccessibleWrapper:public OAccessibleWrapper_Base
+ ,public OComponentProxyAggregation
+
+ {
+ private:
+ css::uno::Reference< css::accessibility::XAccessible >
+ m_xParentAccessible;
+ css::uno::WeakReference< css::accessibility::XAccessibleContext >
+ m_aContext;
+
+ protected:
+ css::uno::Reference< css::accessibility::XAccessible >
+ m_xInnerAccessible;
+
+ public:
+ /** ctor
+ @param _rxContext
+ a service factory
+
+ @param _rxInnerAccessible
+ the object to wrap
+
+ @param _rxParentAccessible
+ The XAccessible which is our parent
+ */
+ OAccessibleWrapper(
+ const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxInnerAccessible,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+ );
+ DECLARE_XINTERFACE()
+ DECLARE_XTYPEPROVIDER()
+
+ // returns the context without creating it
+ css::uno::Reference< css::accessibility::XAccessibleContext >
+ getContextNoCreate( ) const;
+
+ protected:
+ virtual css::uno::Reference< css::accessibility::XAccessibleContext > SAL_CALL
+ getAccessibleContext( ) override;
+
+ const css::uno::Reference< css::accessibility::XAccessible >&
+ getParent() const { return m_xParentAccessible; }
+
+ // own overridables
+ virtual rtl::Reference<OAccessibleContextWrapper> createAccessibleContext(
+ const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerContext
+ );
+
+ protected:
+ virtual ~OAccessibleWrapper( ) override;
+
+ private:
+ OAccessibleWrapper( const OAccessibleWrapper& ) = delete;
+ OAccessibleWrapper& operator=( const OAccessibleWrapper& ) = delete;
+ };
+
+
+ //= OAccessibleContextWrapperHelper
+
+
+ typedef ::cppu::ImplHelper1 < css::accessibility::XAccessibleEventListener
+ > OAccessibleContextWrapperHelper_Base;
+
+ /** Helper for wrapping an XAccessibleContext by aggregating a proxy for it.
+
+ <p>This class does not have own ref counting. In addition, it does not implement
+ the XAccessibleContext interface, but provides all the methods from this interface
+ which must be implemented using the inner context (such as getAccessibleChild*).</p>
+
+ <p>Children of the aggregated XAccessibleContext are wrapped, too.</p>
+
+ <p>AccessibleEvents fired by the inner context are multiplexed, especially, any references to
+ children in such events are translated. This means that even in such events, no un-wrapped object
+ will ever leave this class - if the aggregated context notifies a child event, the child passed
+ to the event is wrapped</p>
+
+ @seealso OAccessibleContextWrapper
+ */
+ class COMPHELPER_DLLPUBLIC OAccessibleContextWrapperHelper
+ :private OComponentProxyAggregationHelper
+ ,public OAccessibleContextWrapperHelper_Base
+ {
+ protected:
+ /// the context we're wrapping (properly typed, in opposite to OComponentProxyAggregationHelper::m_xInner)
+ css::uno::Reference< css::accessibility::XAccessibleContext >
+ m_xInnerContext;
+ /// the XAccessible which created this context
+ css::uno::Reference< css::accessibility::XAccessible >
+ m_xOwningAccessible;
+ /// the XAccessible which is to be returned in getAccessibleParent
+ css::uno::Reference< css::accessibility::XAccessible >
+ m_xParentAccessible;
+
+ rtl::Reference<OWrappedAccessibleChildrenManager> m_xChildMapper; // for mapping children from our inner context to our callers
+
+ protected:
+ /** ctor
+
+ @param _rxContext
+ a service factory
+
+ @param _rxInnerAccessibleContext
+ the object to wrap
+
+ @param _rxOwningAccessible
+ The XAccessible which created this object. This is necessary because children
+ of our wrapped context need to be wrapped, too, and if they're asked for a parent,
+ they of course should return the proper parent<br/>
+ The object will be held with a hard reference
+
+ @param _rxParentAccessible
+ The XAccessible to return in the getAccessibleParent call
+ */
+ OAccessibleContextWrapperHelper(
+ const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+ ::cppu::OBroadcastHelper& _rBHelper,
+ const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxOwningAccessible,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+ );
+
+ /// to be called from within your ctor - does the aggregation of a proxy for m_xInnerContext
+ void aggregateProxy(
+ oslInterlockedCount& _rRefCount,
+ ::cppu::OWeakObject& _rDelegator
+ );
+
+ protected:
+ // XInterface
+ css::uno::Any SAL_CALL queryInterface( const css::uno::Type& _rType ) override;
+
+ // XTypeProvider
+ DECLARE_XTYPEPROVIDER( )
+
+ // XAccessibleContext
+ /// @throws css::uno::RuntimeException
+ sal_Int32 baseGetAccessibleChildCount( );
+ /// @throws css::lang::IndexOutOfBoundsException
+ /// @throws css::uno::RuntimeException
+ css::uno::Reference< css::accessibility::XAccessible > baseGetAccessibleChild( sal_Int32 i );
+ /// @throws css::uno::RuntimeException
+ css::uno::Reference< css::accessibility::XAccessibleRelationSet > baseGetAccessibleRelationSet( );
+
+ // XAccessibleEventListener
+ virtual void SAL_CALL notifyEvent( const css::accessibility::AccessibleEventObject& aEvent ) override;
+
+ // XEventListener
+ virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+ // XComponent/OComponentProxyAggregationHelper
+ virtual void SAL_CALL dispose() override;
+
+ // own overridables
+ /** notify an accessible event which has been translated (if necessary)
+
+ <p>Usually, you derive your class from both OAccessibleContextWrapperHelper and XAccessibleEventBroadcaster,
+ and simply call all your XAccessibleEventListener with the given event.</p>
+
+ <p>The mutex of the BroadcastHelper passed to the instance's ctor is <em>not</em> locked when calling
+ into this method</p>
+
+ @throws css::uno::RuntimeException
+ */
+ virtual void notifyTranslatedEvent( const css::accessibility::AccessibleEventObject& _rEvent ) = 0;
+
+ protected:
+ virtual ~OAccessibleContextWrapperHelper( ) override;
+
+ OAccessibleContextWrapperHelper(const OAccessibleContextWrapperHelper&) = delete;
+ OAccessibleContextWrapperHelper& operator=(const OAccessibleContextWrapperHelper&) = delete;
+ };
+
+
+ //= OAccessibleContextWrapper
+
+ typedef ::cppu::WeakComponentImplHelper< css::accessibility::XAccessibleEventBroadcaster
+ , css::accessibility::XAccessibleContext
+ > OAccessibleContextWrapper_CBase;
+
+ class COMPHELPER_DLLPUBLIC OAccessibleContextWrapper
+ :public cppu::BaseMutex
+ ,public OAccessibleContextWrapper_CBase
+ ,public OAccessibleContextWrapperHelper
+ {
+ private:
+ ::comphelper::AccessibleEventNotifier::TClientId m_nNotifierClient; // for notifying AccessibleEvents
+
+ public:
+ /** ctor
+
+ @param _rxContext
+ a service factory
+
+ @param _rxInnerAccessibleContext
+ the object to wrap
+
+ @param _rxOwningAccessible
+ The XAccessible which created this object. This is necessary because children
+ of our wrapped context need to be wrapped, too, and if they're asked for a parent,
+ they of course should return the proper parent<br/>
+ The object will be held with a hard reference
+
+ @param _rxParentAccessible
+ The XAccessible to return in the getAccessibleParent call
+ */
+ OAccessibleContextWrapper(
+ const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+ const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxOwningAccessible,
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+ );
+
+ // XInterface
+ DECLARE_XINTERFACE( )
+ // XTypeProvider
+ DECLARE_XTYPEPROVIDER( )
+
+ // XAccessibleContext
+ virtual sal_Int32 SAL_CALL getAccessibleChildCount( ) override;
+ virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int32 i ) override;
+ virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleParent( ) override;
+ virtual sal_Int32 SAL_CALL getAccessibleIndexInParent( ) override;
+ virtual sal_Int16 SAL_CALL getAccessibleRole( ) override;
+ virtual OUString SAL_CALL getAccessibleDescription( ) override;
+ virtual OUString SAL_CALL getAccessibleName( ) override;
+ virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet( ) override;
+ virtual css::uno::Reference< css::accessibility::XAccessibleStateSet > SAL_CALL getAccessibleStateSet( ) override;
+ virtual css::lang::Locale SAL_CALL getLocale( ) override;
+
+ // XAccessibleEventBroadcaster
+ virtual void SAL_CALL addAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+ virtual void SAL_CALL removeAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+
+ // OAccessibleContextWrapper
+ virtual void notifyTranslatedEvent( const css::accessibility::AccessibleEventObject& _rEvent ) override;
+
+ // OComponentHelper
+ using OAccessibleContextWrapperHelper::disposing;
+ virtual void SAL_CALL disposing() override;
+
+ protected:
+ virtual ~OAccessibleContextWrapper() override;
+
+ private:
+ OAccessibleContextWrapper( const OAccessibleContextWrapper& ) = delete;
+ OAccessibleContextWrapper& operator=( const OAccessibleContextWrapper& ) = delete;
+ };
+
+
+ //= OWrappedAccessibleChildrenManager
+
+
+ typedef ::std::map < css::uno::Reference< css::accessibility::XAccessible >
+ , rtl::Reference< comphelper::OAccessibleWrapper >
+ > AccessibleMap;
+ // TODO: think about if we should hold these objects weak
+
+ typedef ::cppu::WeakImplHelper< css::lang::XEventListener
+ > OWrappedAccessibleChildrenManager_Base;
+ /** manages wrapping XAccessible's to XAccessible's
+ */
+ class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OWrappedAccessibleChildrenManager final : public OWrappedAccessibleChildrenManager_Base
+ {
+ css::uno::Reference< css::uno::XComponentContext >
+ m_xContext;
+ css::uno::WeakReference< css::accessibility::XAccessible >
+ m_aOwningAccessible; // the XAccessible which belongs to the XAccessibleContext which we work for
+ AccessibleMap m_aChildrenMap; // for caching children
+ bool m_bTransientChildren; // are we prohibited to cache our children?
+
+ public:
+ /// ctor
+ OWrappedAccessibleChildrenManager(
+ const css::uno::Reference< css::uno::XComponentContext >& _rxContext
+ );
+
+ /** specifies if the children are to be considered transient (i.e.: not cached)
+ <p>to be called only once per lifetime</p>
+ */
+ void setTransientChildren( bool _bSet );
+
+ /** sets the XAccessible which belongs to the XAccessibleContext which we work for
+ <p>to be called only once per lifetime</p>
+ */
+ void setOwningAccessible( const css::uno::Reference< css::accessibility::XAccessible >& _rxAcc );
+
+ /// retrieves a wrapper for the given accessible
+ css::uno::Reference< css::accessibility::XAccessible >
+ getAccessibleWrapperFor(
+ const css::uno::Reference< css::accessibility::XAccessible >& _rxKey
+ );
+
+ /// erases the given key from the map (if it is present there)
+ void removeFromCache( const css::uno::Reference< css::accessibility::XAccessible >& _rxKey );
+
+ /// invalidates (i.e. empties) the map
+ void invalidateAll( );
+
+ /** disposes (i.e. clears) the manager
+
+ <p>Note that the XAccessibleContext's of the mapped XAccessible objects are disposed, too.</p>
+ */
+ void dispose();
+
+ /** handles a notification as got from the parent of the children we're managing
+ <p>This applies only to the notifications which have a direct impact on our map.</p>
+ */
+ void handleChildNotification( const css::accessibility::AccessibleEventObject& _rEvent );
+
+ /** translates events as got from the parent of the children we're managing
+ <p>This applies only to the notifications which deal with child objects which we manage.</p>
+ */
+ void translateAccessibleEvent(
+ const css::accessibility::AccessibleEventObject& _rEvent,
+ css::accessibility::AccessibleEventObject& _rTranslatedEvent
+ );
+
+ private:
+ // XEventListener
+ virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+ void implTranslateChildEventValue( const css::uno::Any& _rInValue, css::uno::Any& _rOutValue );
+
+ virtual ~OWrappedAccessibleChildrenManager( ) override;
+
+ OWrappedAccessibleChildrenManager( const OWrappedAccessibleChildrenManager& ) = delete;
+ OWrappedAccessibleChildrenManager& operator=( const OWrappedAccessibleChildrenManager& ) = delete;
+ };
+
+
+} // namespace accessibility
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLEWRAPPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */