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Diffstat (limited to 'sd/source/ui/inc/AccessibleDocumentViewBase.hxx')
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diff --git a/sd/source/ui/inc/AccessibleDocumentViewBase.hxx b/sd/source/ui/inc/AccessibleDocumentViewBase.hxx new file mode 100644 index 000000000..0db25b689 --- /dev/null +++ b/sd/source/ui/inc/AccessibleDocumentViewBase.hxx @@ -0,0 +1,324 @@ +/* -*- 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_SD_SOURCE_UI_INC_ACCESSIBLEDOCUMENTVIEWBASE_HXX +#define INCLUDED_SD_SOURCE_UI_INC_ACCESSIBLEDOCUMENTVIEWBASE_HXX + +#include <editeng/AccessibleContextBase.hxx> +#include <editeng/AccessibleComponentBase.hxx> +#include <editeng/AccessibleSelectionBase.hxx> +#include "AccessibleViewForwarder.hxx" +#include <svx/AccessibleShapeTreeInfo.hxx> +#include <svx/IAccessibleViewForwarderListener.hxx> + +#include <com/sun/star/awt/XWindowListener.hpp> +#include <com/sun/star/awt/XFocusListener.hpp> +#include <com/sun/star/beans/XPropertyChangeListener.hpp> +#include <tools/link.hxx> + +#include <com/sun/star/accessibility/XAccessibleExtendedAttributes.hpp> + +#include "Window.hxx" + +namespace com::sun::star::accessibility { class XAccessible; } +namespace com::sun::star::frame { class XModel; } +namespace com::sun::star::awt { class XWindow; } + +class VclWindowEvent; + +namespace sd { +class ViewShell; +} + +namespace accessibility { + +/** Base class for the various document views of the Draw and + Impress applications. + + <p>The different view modes of the Draw and Impress applications + are made accessible by derived classes. When the view mode is + changed then the object representing the document view is + disposed and replaced by a new instance of the then appropriate + derived class.</p> + + <p>This base class also manages an optionally active accessible OLE + object. If you overwrite the <member>getAccessibleChildCount</member> + and <member>getAccessibleChild</member> methods then make sure to first + call the corresponding method of this class and adapt your child count + and indices accordingly. Only one active OLE object is allowed at a + time. This class does not listen for disposing calls at the moment + because it does not use the accessible OLE object directly and trusts on + getting informed through VCL window events.</p> + + <p>This class implements three kinds of listeners: + <ol><li>The property change listener is not used directly but exists as + convenience for derived classes. May be moved to those classes + instead.</li> + <li>As window listener it waits for changes of the window geometry and + forwards those as view forwarder changes.</li> + <li>As focus listener it keeps track of the focus to give this class and + derived classes the opportunity to set and remove the focus to/from + shapes.</li> + </ol> + </p> +*/ +class AccessibleDocumentViewBase + : public AccessibleContextBase, + public AccessibleComponentBase, + public AccessibleSelectionBase, + public IAccessibleViewForwarderListener, + public css::beans::XPropertyChangeListener, + public css::awt::XWindowListener, + public css::awt::XFocusListener, + public css::accessibility::XAccessibleExtendedAttributes +{ +public: + //===== internal ======================================================== + + /** Create a new object. Note that the caller has to call the + Init method directly after this constructor has finished. + @param pSdWindow + The window whose content is to be made accessible. + @param pViewShell + The view shell associated with the given window. + @param rxController + The controller from which to get the model. + @param rxParent + The accessible parent of the new object. Note that this parent does + not necessarily correspond with the parent of the given window. + */ + AccessibleDocumentViewBase ( + ::sd::Window* pSdWindow, + ::sd::ViewShell* pViewShell, + const css::uno::Reference<css::frame::XController>& rxController, + const css::uno::Reference<css::accessibility::XAccessible>& rxParent); + + virtual ~AccessibleDocumentViewBase() override; + + /** Initialize a new object. Call this method directly after creating a + new object. It finished the initialization begun in the constructor + but which needs a fully created object. + */ + virtual void Init(); + + /** Define callback for listening to window child events of VCL. + Listen for creation or destruction of OLE objects. + */ + DECL_LINK( WindowChildEventListener, VclWindowEvent&, void ); + + //===== IAccessibleViewForwarderListener ================================ + + /** A view forwarder change is signalled for instance when any of the + window events is received. Thus, instead of overriding the four + windowResized... methods it will be sufficient in most cases just to + override this method. + */ + virtual void ViewForwarderChanged() override; + + //===== XAccessibleContext ============================================== + + virtual css::uno::Reference<css::accessibility::XAccessible> SAL_CALL + getAccessibleParent() override; + + /** This implementation returns either 1 or 0 depending on whether there + is an active accessible OLE object or not. + */ + virtual sal_Int32 SAL_CALL + getAccessibleChildCount() override; + + /** This implementation either returns the active accessible OLE object + if it exists and the given index is 0 or throws an exception. + */ + virtual css::uno::Reference<css::accessibility::XAccessible> SAL_CALL + getAccessibleChild (sal_Int32 nIndex) override; + + //===== XAccessibleComponent ============================================ + + virtual css::uno::Reference<css::accessibility::XAccessible > SAL_CALL + getAccessibleAtPoint (const css::awt::Point& aPoint) override; + + virtual css::awt::Rectangle SAL_CALL getBounds() 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; + + //===== XInterface ====================================================== + + virtual css::uno::Any SAL_CALL + queryInterface (const css::uno::Type & rType) override; + + virtual void SAL_CALL + acquire() + noexcept override; + + virtual void SAL_CALL + release() + noexcept override; + + //===== XServiceInfo ==================================================== + + /** Returns an identifier for the implementation of this object. + */ + virtual OUString SAL_CALL + getImplementationName() override; + + virtual css::uno::Sequence< OUString> SAL_CALL + getSupportedServiceNames() override; + + //===== XTypeProvider =================================================== + + virtual css::uno::Sequence< css::uno::Type> SAL_CALL + getTypes() override; + + //===== lang::XEventListener ============================================ + + virtual void SAL_CALL + disposing (const css::lang::EventObject& rEventObject) override; + + //===== XPropertyChangeListener ========================================= + + virtual void SAL_CALL + propertyChange (const css::beans::PropertyChangeEvent& rEventObject) override; + + //===== XWindowListener ================================================= + + virtual void SAL_CALL + windowResized (const css::awt::WindowEvent& e) override; + + virtual void SAL_CALL + windowMoved (const css::awt::WindowEvent& e) override; + + virtual void SAL_CALL + windowShown (const css::lang::EventObject& e) override; + + virtual void SAL_CALL + windowHidden (const css::lang::EventObject& e) override; + + //===== XFocusListener ================================================= + + virtual void SAL_CALL focusGained (const css::awt::FocusEvent& e) override; + virtual void SAL_CALL focusLost (const css::awt::FocusEvent& e) override; + //----------------------------xAttribute---------------------------- + virtual css::uno::Any SAL_CALL getExtendedAttributes() override; + ::sd::ViewShell* mpViewShell; +private: + + // return the member maMutex; + virtual ::osl::Mutex& + implGetMutex() override; + + // return ourself as context in default case + virtual css::uno::Reference< css::accessibility::XAccessibleContext > + implGetAccessibleContext() override; + + // return sal_False in default case + virtual bool + implIsSelected( sal_Int32 nAccessibleChildIndex ) override; + + // return nothing in default case + virtual void + implSelect( sal_Int32 nAccessibleChildIndex, bool bSelect ) override; + +protected: + /// The API window that is made accessible. + css::uno::Reference< css::awt::XWindow> + mxWindow; + + /// The controller of the window in which this view is displayed. + css::uno::Reference< css::frame::XController> + mxController; + + /// Model of the document. + css::uno::Reference < css::frame::XModel> + mxModel; + + // Bundle of information that is passed down the shape tree. + AccessibleShapeTreeInfo maShapeTreeInfo; + + /// The view forwarder passed to the children manager. + AccessibleViewForwarder maViewForwarder; + + /** Accessible OLE object. Set or removed by the + <member>SetAccessibleOLEObject</member> method. + */ + css::uno::Reference< css::accessibility::XAccessible> + mxAccessibleOLEObject; + + Link<VclWindowEvent&,void> maWindowLink; + + // This method is called from the component helper base class while + // disposing. + virtual void SAL_CALL disposing() override; + + /** Create a name string. The current name is not modified and, + therefore, no events are sent. This method is usually called once + by the <member>getAccessibleName</member> method of the base class. + @return + A name string. + */ + virtual OUString + CreateAccessibleName () override; + + /** This method is called when (after) the frame containing this + document has been activated. Can be used to send FOCUSED state + changes for the currently selected element. + + Note: Currently used as a substitute for FocusGained. Should be + renamed in the future. + */ + virtual void Activated(); + + /** This method is called when (before or after?) the frame containing + this document has been deactivated. Can be used to send FOCUSED + state changes for the currently selected element. + + Note: Currently used as a substitute for FocusLost. Should be + renamed in the future. + */ + virtual void Deactivated(); + + /** Set or remove the currently active accessible OLE object. + @param xOLEObject + If this is a valid reference then a child event is send that + informs the listeners of a new child. If there has already been + an active accessible OLE object then this is removed first and + appropriate events are sent. + + If this is an empty reference then the currently active + accessible OLE object (if there is one) is removed. + */ + void SetAccessibleOLEObject ( + const css::uno::Reference<css::accessibility::XAccessible>& xOLEObject); + +public: + void SwitchViewActivated() { Activated(); } + virtual sal_Int32 SAL_CALL getForeground( ) override; + + virtual sal_Int32 SAL_CALL getBackground( ) override; + virtual void impl_dispose(); +}; + +} // end of namespace accessibility + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |