/* -*- 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_EDITENG_ACCESSIBLECONTEXTBASE_HXX #define INCLUDED_EDITENG_ACCESSIBLECONTEXTBASE_HXX #include #include #include #include #include #include #include #include namespace com::sun::star::accessibility { class XAccessibleStateSet; } namespace com::sun::star::accessibility { class XAccessibleRelationSet; } namespace com::sun::star::accessibility { struct AccessibleEventObject; } namespace accessibility { struct MutexOwner {mutable ::osl::Mutex maMutex;}; /** @descr This base class provides an implementation of the AccessibleContext service. Apart from the XXAccessible and XAccessibleContextContext interfaces it supports the XServiceInfo interface. */ class EDITENG_DLLPUBLIC AccessibleContextBase : public MutexOwner, public cppu::WeakComponentImplHelper< css::accessibility::XAccessible, css::accessibility::XAccessibleContext, css::accessibility::XAccessibleEventBroadcaster, css::lang::XServiceInfo > { public: //===== internal ======================================================== /** The origin of the accessible name or description. */ enum StringOrigin { ManuallySet, FromShape, AutomaticallyCreated, NotSet }; AccessibleContextBase ( const css::uno::Reference< css::accessibility::XAccessible>& rxParent, const sal_Int16 aRole); virtual ~AccessibleContextBase() override; /** Call all accessiblity event listeners to inform them about the specified event. @param aEventId Id of the event type. @param rNewValue New value of the modified attribute. Pass empty structure if not applicable. @param rOldValue Old value of the modified attribute. Pass empty structure if not applicable. */ void CommitChange (sal_Int16 aEventId, const css::uno::Any& rNewValue, const css::uno::Any& rOldValue); /** Set a new description and, provided that the new name differs from the old one, broadcast an accessibility event. @param rsDescription The new description. @param eDescriptionOrigin The origin of the description. This is used to determine whether the given description overrules the existing one. An origin with a lower numerical value overrides one with a higher value. @throws css::uno::RuntimeException */ void SetAccessibleDescription ( const OUString& rsDescription, StringOrigin eDescriptionOrigin); /** Set a new description and, provided that the new name differs from the old one, broadcast an accessibility event. @param rsName The new name. @param eNameOrigin The origin of the name. This is used to determine whether the given name overrules the existing one. An origin with a lower numerical value overrides one with a higher value. @throws css::uno::RuntimeException */ void SetAccessibleName ( const OUString& rsName, StringOrigin eNameOrigin); /** Set the specified state (turn it on) and send events to all listeners to inform them of the change. @param aState The state to turn on. @return If the specified state changed its value due to this call is returned, otherwise . */ virtual bool SetState (sal_Int16 aState); /** Reset the specified state (turn it off) and send events to all listeners to inform them of the change. @param aState The state to turn off. @return If the specified state changed its value due to this call is returned, otherwise . */ virtual bool ResetState (sal_Int16 aState); /** Return the state of the specified state. @param aState The state for which to return its value. @return A value of indicates that the state is set. A value indicates an unset state. */ bool GetState (sal_Int16 aState); /** Replace the current relation set with the specified one. Send events for relations that are not in both sets. @param rRelationSet The new relation set that replaces the old one. @throws css::uno::RuntimeException */ void SetRelationSet ( const css::uno::Reference< css::accessibility::XAccessibleRelationSet>& rxRelationSet); //===== XAccessible ===================================================== /// Return the XAccessibleContext. virtual css::uno::Reference< css::accessibility::XAccessibleContext> SAL_CALL getAccessibleContext() override; //===== XAccessibleContext ============================================== /// Return the number of currently visible children. virtual sal_Int32 SAL_CALL getAccessibleChildCount() override; /// Return the specified child or throw exception. virtual css::uno::Reference< css::accessibility::XAccessible> SAL_CALL getAccessibleChild (sal_Int32 nIndex) override; /// Return a reference to the parent. virtual css::uno::Reference< css::accessibility::XAccessible> SAL_CALL getAccessibleParent() override; /// Return this objects index among the parents children. virtual sal_Int32 SAL_CALL getAccessibleIndexInParent() override; /// Return this object's role. virtual sal_Int16 SAL_CALL getAccessibleRole() override; /// Return this object's description. virtual OUString SAL_CALL getAccessibleDescription() override; /// Return the object's current name. virtual OUString SAL_CALL getAccessibleName() override; /// Return NULL to indicate that an empty relation set. virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet> SAL_CALL getAccessibleRelationSet() override; /// Return the set of current states. virtual css::uno::Reference< css::accessibility::XAccessibleStateSet> SAL_CALL getAccessibleStateSet() override; /** Return the parents locale or throw exception if this object has no parent yet/anymore. */ 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; //===== XServiceInfo ==================================================== /** Returns an identifier for the implementation of this object. */ virtual OUString SAL_CALL getImplementationName() override; /** Return whether the specified service is supported by this class. */ virtual sal_Bool SAL_CALL supportsService (const OUString& sServiceName) override; /** Returns a list of all supported services. In this case that is just the AccessibleContext service. */ virtual css::uno::Sequence< OUString> SAL_CALL getSupportedServiceNames() override; //===== XTypeProvider =================================================== /** Returns a implementation id. */ virtual css::uno::Sequence SAL_CALL getImplementationId() override; protected: /** The state set. */ css::uno::Reference< css::accessibility::XAccessibleStateSet> mxStateSet; /** The relation set. Relations can be set or removed by calling the AddRelation and RemoveRelation methods. */ css::uno::Reference< css::accessibility::XAccessibleRelationSet> mxRelationSet; // This method is called from the component helper base class while disposing. virtual void SAL_CALL disposing() override; /** Create the accessible object's name. This method may be called more than once for a single object. @return The returned string is a unique (among the accessible object's siblings) name. @throws css::uno::RuntimeException */ virtual OUString CreateAccessibleName(); void FireEvent (const css::accessibility::AccessibleEventObject& aEvent); /** Check whether or not the object has been disposed (or is in the state of being disposed). If that is the case then DisposedException is thrown to inform the (indirect) caller of the foul deed. @throws css::lang::DisposedException */ void ThrowIfDisposed(); /** Check whether or not the object has been disposed (or is in the state of being disposed). @return TRUE, if the object is disposed or in the course of being disposed. Otherwise, FALSE is returned. */ bool IsDisposed(); /** sets the role as returned by XaccessibleContext::getAccessibleRole

Caution: This is only to be used in the construction phase (means within the ctor or late ctor), never when the object is still alive and part of an Accessibility hierarchy.

*/ void SetAccessibleRole( sal_Int16 _nRole ); private: /// Reference to the parent object. css::uno::Reference< css::accessibility::XAccessible> mxParent; /** Description of this object. This is not a constant because it can be set from the outside. Furthermore, it changes according to the draw page's display mode. */ OUString msDescription; /** The origin of the description is used to determine whether new descriptions given to the SetAccessibleDescription is ignored or whether that replaces the old value in msDescription. */ StringOrigin meDescriptionOrigin; /** Name of this object. It changes according the draw page's display mode. */ OUString msName; /** The origin of the name is used to determine whether new name given to the SetAccessibleName is ignored or whether that replaces the old value in msName. */ StringOrigin meNameOrigin; /** client id in the AccessibleEventNotifier queue */ sal_uInt32 mnClientId; /** This is the role of this object. */ sal_Int16 maRole; }; } #endif /* vim:set shiftwidth=4 softtabstop=4 expandtab: */