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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_ACCESSIBLECOMPONENTHELPER_HXX
#define INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
#include <com/sun/star/accessibility/XAccessibleComponent.hpp>
#include <com/sun/star/accessibility/XAccessibleContext2.hpp>
#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
#include <com/sun/star/accessibility/XAccessibleExtendedComponent.hpp>
#include <comphelper/accessibleeventnotifier.hxx>
#include <cppuhelper/basemutex.hxx>
#include <cppuhelper/compbase.hxx>
#include <cppuhelper/implbase.hxx>
#include <comphelper/comphelperdllapi.h>
namespace comphelper
{
//= OCommonAccessibleComponent
typedef ::cppu::WeakComponentImplHelper < css::accessibility::XAccessibleContext2,
css::accessibility::XAccessibleEventBroadcaster
> OCommonAccessibleComponent_Base;
/** base class encapsulating common functionality for the helper classes implementing
the XAccessibleComponent respectively XAccessibleExtendendComponent
*/
class COMPHELPER_DLLPUBLIC OCommonAccessibleComponent
:public ::cppu::BaseMutex
,public OCommonAccessibleComponent_Base
{
friend class OContextEntryGuard;
private:
css::uno::WeakReference< css::accessibility::XAccessible > m_aCreator; // the XAccessible which created our XAccessibleContext
AccessibleEventNotifier::TClientId m_nClientId;
protected:
virtual ~OCommonAccessibleComponent( ) override;
OCommonAccessibleComponent( );
/** late construction
@param _rxAccessible
the Accessible object which created this context.
<p>If your derived implementation implements the XAccessible (and does not follow the proposed
separation of XAccessible from XAccessibleContext), you may pass <code>this</code> here.</p>
<p>The object is hold weak, so its life time is not affected.</p>
<p>The object is needed for performance reasons: for <method>getAccessibleIndexInParent</method>,
all children (which are XAccessible's theirself) of our parent have to be asked. If we know our
XAccessible, we can compare it with all the children, instead of asking all children for their
context and comparing this context with ourself.</p>
*/
void lateInit( const css::uno::Reference< css::accessibility::XAccessible >& _rxAccessible );
/** retrieves the creator previously set with <method>lateInit</method>
*/
css::uno::Reference< css::accessibility::XAccessible >
getAccessibleCreator( ) const;
public:
// 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;
// XAccessibleContext - still waiting to be overwritten
virtual sal_Int64 SAL_CALL getAccessibleChildCount( ) override = 0;
virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int64 i ) override = 0;
virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleParent( ) override = 0;
virtual sal_Int16 SAL_CALL getAccessibleRole( ) override = 0;
virtual OUString SAL_CALL getAccessibleDescription( ) override = 0;
virtual OUString SAL_CALL getAccessibleName( ) override = 0;
virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet( ) override = 0;
virtual sal_Int64 SAL_CALL getAccessibleStateSet( ) override = 0;
// XAccessibleContext2 - default implementation
virtual OUString SAL_CALL getAccessibleId( ) override;
// XAccessibleContext - default implementations
/** default implementation for retrieving the index of this object within the parent
<p>This basic implementation here returns the index <code>i</code> of the child for which
<code><parent>.getAccessibleChild( i )</code> equals our creator.</p>
*/
virtual sal_Int64 SAL_CALL getAccessibleIndexInParent( ) override;
/** default implementation for retrieving the locale
<p>This basic implementation returns the locale of the parent context,
as retrieved via getAccessibleParent()->getAccessibleContext.</p>
*/
virtual css::lang::Locale SAL_CALL getLocale( ) override;
protected:
// OComponentHelper
virtual void SAL_CALL disposing() override;
protected:
// helper
/** notifies all AccessibleEventListeners of a certain event
@precond not to be called with our mutex locked
@param _nEventId
the id of the event. See AccessibleEventType
@param _rOldValue
the old value to be notified
@param _rNewValue
the new value to be notified
*/
void NotifyAccessibleEvent(
const sal_Int16 _nEventId,
const css::uno::Any& _rOldValue,
const css::uno::Any& _rNewValue,
sal_Int32 nIndexHint = -1
);
// life time control
/// checks whether the object is alive (returns <TRUE/> then) or disposed
bool isAlive() const;
/// checks for being alive. If the object is already disposed (i.e. not alive), an exception is thrown.
void ensureAlive() const;
/** ensures that the object is disposed.
@precond
to be called from within the destructor of your derived class only!
*/
void ensureDisposed( );
/** shortcut for retrieving the context of the parent (returned by getAccessibleParent)
*/
css::uno::Reference< css::accessibility::XAccessibleContext >
implGetParentContext();
// access to the base class' broadcast helper/mutex
::osl::Mutex& GetMutex() { return m_aMutex; }
protected:
/// implements the calculation of the bounding rectangle - still waiting to be overwritten
///
/// @throws css::uno::RuntimeException
virtual css::awt::Rectangle implGetBounds( ) = 0;
protected:
/** non-virtual versions of the methods which can be implemented using <method>implGetBounds</method>
note: getLocationOnScreen relies on a valid parent (XAccessibleContext::getParent()->getAccessibleContext()),
which itself implements XAccessibleComponent
@throws css::uno::RuntimeException
*/
bool containsPoint( const css::awt::Point& aPoint );
/// @throws css::uno::RuntimeException
css::awt::Point getLocation( );
/// @throws css::uno::RuntimeException
css::awt::Point getLocationOnScreen( );
/// @throws css::uno::RuntimeException
css::awt::Size getSize( );
/// @throws css::uno::RuntimeException
css::awt::Rectangle getBounds( );
};
//= OAccessibleComponentHelper
/** a helper class for implementing an AccessibleContext which at the same time
supports an XAccessibleComponent interface.
*/
class COMPHELPER_DLLPUBLIC OAccessibleComponentHelper
:public cppu::ImplInheritanceHelper<
OCommonAccessibleComponent, css::accessibility::XAccessibleComponent>
{
private:
OAccessibleComponentHelper(OAccessibleComponentHelper const &) = delete;
OAccessibleComponentHelper(OAccessibleComponentHelper &&) = delete;
void operator =(OAccessibleComponentHelper const &) = delete;
void operator =(OAccessibleComponentHelper &&) = delete;
protected:
OAccessibleComponentHelper();
public:
// XAccessibleComponent - default implementations
virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
virtual css::awt::Point SAL_CALL getLocation( ) override;
virtual css::awt::Point SAL_CALL getLocationOnScreen( ) override;
virtual css::awt::Size SAL_CALL getSize( ) override;
virtual css::awt::Rectangle SAL_CALL getBounds( ) override;
};
//= OAccessibleExtendedComponentHelper
/** a helper class for implementing an AccessibleContext which at the same time
supports an XAccessibleExtendedComponent interface.
*/
class COMPHELPER_DLLPUBLIC OAccessibleExtendedComponentHelper
:public cppu::ImplInheritanceHelper<
OCommonAccessibleComponent, css::accessibility::XAccessibleExtendedComponent>
{
private:
OAccessibleExtendedComponentHelper(OAccessibleExtendedComponentHelper const &) = delete;
OAccessibleExtendedComponentHelper(OAccessibleExtendedComponentHelper &&) = delete;
void operator =(OAccessibleExtendedComponentHelper const &) = delete;
void operator =(OAccessibleExtendedComponentHelper &&) = delete;
protected:
OAccessibleExtendedComponentHelper( );
public:
// XAccessibleComponent - default implementations
virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
virtual css::awt::Point SAL_CALL getLocation( ) override;
virtual css::awt::Point SAL_CALL getLocationOnScreen( ) override;
virtual css::awt::Size SAL_CALL getSize( ) override;
virtual css::awt::Rectangle SAL_CALL getBounds( ) override;
};
} // namespace comphelper
#endif // INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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