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Current view: top level - include/editeng - AccessibleContextBase.hxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 1 1 100.0 %
Date: 2015-06-13 12:38:46 Functions: 2 2 100.0 %
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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef INCLUDED_EDITENG_ACCESSIBLECONTEXTBASE_HXX
      21             : #define INCLUDED_EDITENG_ACCESSIBLECONTEXTBASE_HXX
      22             : 
      23             : #include <com/sun/star/accessibility/XAccessible.hpp>
      24             : #include <com/sun/star/accessibility/XAccessibleContext.hpp>
      25             : #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
      26             : #include <com/sun/star/accessibility/XAccessibleStateSet.hpp>
      27             : #include <com/sun/star/accessibility/XAccessibleRelationSet.hpp>
      28             : #include <com/sun/star/accessibility/AccessibleEventObject.hpp>
      29             : #include <com/sun/star/accessibility/AccessibleEventId.hpp>
      30             : #include <com/sun/star/accessibility/IllegalAccessibleComponentStateException.hpp>
      31             : #include <com/sun/star/uno/Reference.hxx>
      32             : #include <com/sun/star/lang/XComponent.hpp>
      33             : #include <cppuhelper/weak.hxx>
      34             : #include <com/sun/star/lang/XServiceInfo.hpp>
      35             : #include <com/sun/star/lang/XTypeProvider.hpp>
      36             : #include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
      37             : #include <com/sun/star/lang/DisposedException.hpp>
      38             : #include <osl/mutex.hxx>
      39             : #include <cppuhelper/compbase4.hxx>
      40             : #include <editeng/editengdllapi.h>
      41             : 
      42             : 
      43             : namespace accessibility {
      44             : 
      45          34 : struct MutexOwner {mutable ::osl::Mutex maMutex;};
      46             : 
      47             : /** @descr
      48             :         This base class provides an implementation of the
      49             :         AccessibleContext service. Apart from the
      50             :         <type>XXAccessible<type> and XAccessibleContextContext
      51             :         interfaces it supports the XServiceInfo interface.
      52             : */
      53             : class EDITENG_DLLPUBLIC AccessibleContextBase
      54             :     :   public MutexOwner,
      55             :         public cppu::WeakComponentImplHelper4<
      56             :         ::com::sun::star::accessibility::XAccessible,
      57             :         ::com::sun::star::accessibility::XAccessibleContext,
      58             :         ::com::sun::star::accessibility::XAccessibleEventBroadcaster,
      59             :         ::com::sun::star::lang::XServiceInfo
      60             :         >
      61             : {
      62             : public:
      63             : 
      64             :     //=====  internal  ========================================================
      65             : 
      66             :     /** The origin of the accessible name or description.
      67             :     */
      68             :     enum StringOrigin {
      69             :         ManuallySet,
      70             :         FromShape,
      71             :         AutomaticallyCreated,
      72             :         NotSet
      73             :     };
      74             : 
      75             :     AccessibleContextBase (
      76             :         const ::com::sun::star::uno::Reference<
      77             :             ::com::sun::star::accessibility::XAccessible>& rxParent,
      78             :         const sal_Int16 aRole);
      79             :     virtual ~AccessibleContextBase();
      80             : 
      81             : 
      82             :     /** Call all accessiblity event listeners to inform them about the
      83             :         specified event.
      84             :         @param aEventId
      85             :             Id of the event type.
      86             :         @param rNewValue
      87             :             New value of the modified attribute.  Pass empty structure if
      88             :             not applicable.
      89             :         @param rOldValue
      90             :             Old value of the modified attribute.  Pass empty structure if
      91             :             not applicable.
      92             :     */
      93             :     void CommitChange (sal_Int16 aEventId,
      94             :         const ::com::sun::star::uno::Any& rNewValue,
      95             :         const ::com::sun::star::uno::Any& rOldValue);
      96             : 
      97             :     /** Set a new description and, provided that the new name differs from
      98             :         the old one, broadcast an accessibility event.
      99             :         @param rsDescription
     100             :             The new description.
     101             :         @param eDescriptionOrigin
     102             :             The origin of the description.  This is used to determine
     103             :             whether the given description overrules the existing one.  An
     104             :             origin with a lower numerical value overrides one with a higher
     105             :             value.
     106             :     */
     107             :     void SetAccessibleDescription (
     108             :         const OUString& rsDescription,
     109             :         StringOrigin eDescriptionOrigin)
     110             :         throw (::com::sun::star::uno::RuntimeException);
     111             : 
     112             :     /** Set a new description and, provided that the new name differs from
     113             :         the old one, broadcast an accessibility event.
     114             :         @param rsName
     115             :             The new name.
     116             :         @param eNameOrigin
     117             :             The origin of the name.  This is used to determine whether the
     118             :             given name overrules the existing one.  An origin with a lower
     119             :             numerical value overrides one with a higher value.
     120             :     */
     121             :     void SetAccessibleName (
     122             :         const OUString& rsName,
     123             :         StringOrigin eNameOrigin)
     124             :         throw (::com::sun::star::uno::RuntimeException);
     125             : 
     126             :     /** Set the specified state (turn it on) and send events to all
     127             :         listeners to inform them of the change.
     128             : 
     129             :         @param aState
     130             :             The state to turn on.
     131             : 
     132             :         @return
     133             :             If the specified state changed its value due to this call
     134             :             <TRUE/> is returned, otherwise <FALSE/>.
     135             :     */
     136             :     virtual bool SetState (sal_Int16 aState);
     137             : 
     138             :     /** Reset the specified state (turn it off) and send events to all
     139             :         listeners to inform them of the change.
     140             : 
     141             :         @param aState
     142             :             The state to turn off.
     143             : 
     144             :         @return
     145             :             If the specified state changed its value due to this call
     146             :             <TRUE/> is returned, otherwise <FALSE/>.
     147             :     */
     148             :     virtual bool ResetState (sal_Int16 aState);
     149             : 
     150             :     /** Return the state of the specified state.
     151             : 
     152             :         @param aState
     153             :             The state for which to return its value.
     154             : 
     155             :         @return
     156             :             A value of <TRUE/> indicates that the state is set.  A <FALSE/>
     157             :             value indicates an unset state.
     158             :     */
     159             :     bool GetState (sal_Int16 aState);
     160             : 
     161             :     /** Replace the current relation set with the specified one.  Send
     162             :         events for relations that are not in both sets.
     163             : 
     164             :         @param rRelationSet
     165             :             The new relation set that replaces the old one.
     166             :     */
     167             :     void SetRelationSet (
     168             :         const ::com::sun::star::uno::Reference<
     169             :         ::com::sun::star::accessibility::XAccessibleRelationSet>& rxRelationSet)
     170             :         throw (::com::sun::star::uno::RuntimeException);
     171             : 
     172             : 
     173             :     //=====  XAccessible  =====================================================
     174             : 
     175             :     /// Return the XAccessibleContext.
     176             :     virtual ::com::sun::star::uno::Reference<
     177             :         ::com::sun::star::accessibility::XAccessibleContext> SAL_CALL
     178             :         getAccessibleContext() throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     179             : 
     180             : 
     181             :     //=====  XAccessibleContext  ==============================================
     182             : 
     183             :     /// Return the number of currently visible children.
     184             :     virtual sal_Int32 SAL_CALL
     185             :         getAccessibleChildCount() throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     186             : 
     187             :     /// Return the specified child or throw exception.
     188             :     virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible> SAL_CALL
     189             :         getAccessibleChild (sal_Int32 nIndex)
     190             :         throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     191             : 
     192             :     /// Return a reference to the parent.
     193             :     virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible> SAL_CALL
     194             :         getAccessibleParent()
     195             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     196             : 
     197             :     /// Return this objects index among the parents children.
     198             :     virtual sal_Int32 SAL_CALL
     199             :         getAccessibleIndexInParent()
     200             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     201             : 
     202             :     /// Return this object's role.
     203             :     virtual sal_Int16 SAL_CALL
     204             :         getAccessibleRole()
     205             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     206             : 
     207             :     /// Return this object's description.
     208             :     virtual OUString SAL_CALL
     209             :         getAccessibleDescription()
     210             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     211             : 
     212             :     /// Return the object's current name.
     213             :     virtual OUString SAL_CALL
     214             :         getAccessibleName()
     215             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     216             : 
     217             :     /// Return NULL to indicate that an empty relation set.
     218             :     virtual ::com::sun::star::uno::Reference<
     219             :             ::com::sun::star::accessibility::XAccessibleRelationSet> SAL_CALL
     220             :         getAccessibleRelationSet()
     221             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     222             : 
     223             :     /// Return the set of current states.
     224             :     virtual ::com::sun::star::uno::Reference<
     225             :             ::com::sun::star::accessibility::XAccessibleStateSet> SAL_CALL
     226             :         getAccessibleStateSet()
     227             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     228             : 
     229             :     /** Return the parents locale or throw exception if this object has no
     230             :         parent yet/anymore.
     231             :     */
     232             :     virtual ::com::sun::star::lang::Locale SAL_CALL
     233             :         getLocale()
     234             :         throw (::com::sun::star::uno::RuntimeException,
     235             :             ::com::sun::star::accessibility::IllegalAccessibleComponentStateException, std::exception) SAL_OVERRIDE;
     236             : 
     237             :     //=====  XAccessibleEventBroadcaster  ========================================
     238             : 
     239             :     virtual void SAL_CALL
     240             :         addAccessibleEventListener (
     241             :             const ::com::sun::star::uno::Reference<
     242             :                 ::com::sun::star::accessibility::XAccessibleEventListener >& xListener)
     243             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     244             : 
     245             :     virtual void SAL_CALL
     246             :         removeAccessibleEventListener (
     247             :             const ::com::sun::star::uno::Reference<
     248             :                 ::com::sun::star::accessibility::XAccessibleEventListener >& xListener)
     249             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     250             : 
     251             : 
     252             :     //=====  XServiceInfo  ====================================================
     253             : 
     254             :     /** Returns an identifier for the implementation of this object.
     255             :     */
     256             :     virtual OUString SAL_CALL
     257             :         getImplementationName()
     258             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     259             : 
     260             :     /** Return whether the specified service is supported by this class.
     261             :     */
     262             :     virtual sal_Bool SAL_CALL
     263             :         supportsService (const OUString& sServiceName)
     264             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     265             : 
     266             :     /** Returns a list of all supported services.  In this case that is just
     267             :         the AccessibleContext service.
     268             :     */
     269             :     virtual ::com::sun::star::uno::Sequence< OUString> SAL_CALL
     270             :         getSupportedServiceNames()
     271             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     272             : 
     273             : 
     274             :     //=====  XTypeProvider  ===================================================
     275             : 
     276             :     /** Returns a sequence of all supported interfaces.
     277             :     */
     278             :     virtual ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Type> SAL_CALL
     279             :         getTypes()
     280             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     281             : 
     282             :     /** Returns a implementation id.
     283             :     */
     284             :     virtual ::com::sun::star::uno::Sequence<sal_Int8> SAL_CALL
     285             :         getImplementationId()
     286             :         throw (::com::sun::star::uno::RuntimeException, std::exception) SAL_OVERRIDE;
     287             : 
     288             : protected:
     289             :     /** The state set.
     290             :     */
     291             :     ::com::sun::star::uno::Reference<
     292             :         ::com::sun::star::accessibility::XAccessibleStateSet> mxStateSet;
     293             : 
     294             :     /** The relation set.  Relations can be set or removed by calling the
     295             :         <member>AddRelation</member> and <member>RemoveRelation</member> methods.
     296             :     */
     297             :     ::com::sun::star::uno::Reference<
     298             :         ::com::sun::star::accessibility::XAccessibleRelationSet> mxRelationSet;
     299             : 
     300             :     // This method is called from the component helper base class while disposing.
     301             :     virtual void SAL_CALL disposing() SAL_OVERRIDE;
     302             : 
     303             :     /** Create the accessible object's name.  This method may be called more
     304             :         than once for a single object.
     305             :         @return
     306             :             The returned string is a unique (among the accessible object's
     307             :             siblings) name.
     308             :     */
     309             :     virtual OUString CreateAccessibleName()
     310             :         throw (::com::sun::star::uno::RuntimeException);
     311             : 
     312             :     /** Create the accessible object's descriptive string.  May be called
     313             :         more than once.
     314             :         @return
     315             :             Descriptive string.  Not necessarily unique.
     316             :     */
     317             :     virtual OUString
     318             :         CreateAccessibleDescription()
     319             :         throw (::com::sun::star::uno::RuntimeException);
     320             : 
     321             :     void FireEvent (const ::com::sun::star::accessibility::AccessibleEventObject& aEvent);
     322             : 
     323             :     /** Check whether or not the object has been disposed (or is in the
     324             :         state of being disposed).  If that is the case then
     325             :         DisposedException is thrown to inform the (indirect) caller of the
     326             :         foul deed.
     327             :     */
     328             :     void ThrowIfDisposed()
     329             :         throw (::com::sun::star::lang::DisposedException);
     330             : 
     331             :     /** Check whether or not the object has been disposed (or is in the
     332             :         state of being disposed).
     333             : 
     334             :         @return TRUE, if the object is disposed or in the course
     335             :         of being disposed. Otherwise, FALSE is returned.
     336             :     */
     337             :     bool IsDisposed();
     338             : 
     339             :     /** sets the role as returned by XaccessibleContext::getAccessibleRole
     340             : 
     341             :         <p>Caution: This is only to be used in the construction phase (means within
     342             :         the ctor or late ctor), <em>never</em> when the object is still alive and part
     343             :         of an Accessibility hierarchy.</p>
     344             :     */
     345             :     void SetAccessibleRole( sal_Int16 _nRole );
     346             : 
     347             : private:
     348             :     /// Reference to the parent object.
     349             :     ::com::sun::star::uno::Reference<
     350             :          ::com::sun::star::accessibility::XAccessible> mxParent;
     351             : 
     352             :     /** Description of this object.  This is not a constant because it can
     353             :         be set from the outside.  Furthermore, it changes according to the
     354             :         draw page's display mode.
     355             :     */
     356             :     OUString msDescription;
     357             : 
     358             :     /** The origin of the description is used to determine whether new
     359             :         descriptions given to the SetAccessibleDescription is ignored or
     360             :         whether that replaces the old value in msDescription.
     361             :     */
     362             :     StringOrigin meDescriptionOrigin;
     363             : 
     364             :     /** Name of this object.  It changes according the draw page's
     365             :         display mode.
     366             :     */
     367             :     OUString msName;
     368             : 
     369             :     /** The origin of the name is used to determine whether new
     370             :         name given to the SetAccessibleName is ignored or
     371             :         whether that replaces the old value in msName.
     372             :     */
     373             :     StringOrigin meNameOrigin;
     374             : 
     375             :     /** client id in the AccessibleEventNotifier queue
     376             :     */
     377             :     sal_uInt32 mnClientId;
     378             : 
     379             :     /** This is the role of this object.
     380             :     */
     381             :     sal_Int16 maRole;
     382             : };
     383             : 
     384             : }
     385             : 
     386             : #endif
     387             : 
     388             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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