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Diffstat (limited to 'svx/source/accessibility/ChildrenManagerImpl.cxx')
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diff --git a/svx/source/accessibility/ChildrenManagerImpl.cxx b/svx/source/accessibility/ChildrenManagerImpl.cxx new file mode 100644 index 000000000..dbfeb7ce4 --- /dev/null +++ b/svx/source/accessibility/ChildrenManagerImpl.cxx @@ -0,0 +1,1040 @@ +/* -*- 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 . + */ + +#include <sal/config.h> + +#include <cassert> + +#include "ChildrenManagerImpl.hxx" +#include <svx/ShapeTypeHandler.hxx> +#include <svx/AccessibleControlShape.hxx> +#include <svx/AccessibleShapeInfo.hxx> +#include <svx/IAccessibleViewForwarder.hxx> +#include <vcl/svapp.hxx> +#include <com/sun/star/accessibility/AccessibleRole.hpp> +#include <com/sun/star/accessibility/AccessibleStateType.hpp> +#include <com/sun/star/accessibility/AccessibleEventId.hpp> +#include <com/sun/star/beans/XPropertySet.hpp> +#include <com/sun/star/document/XShapeEventBroadcaster.hpp> +#include <com/sun/star/frame/XController.hpp> +#include <com/sun/star/lang/IndexOutOfBoundsException.hpp> +#include <com/sun/star/view/XSelectionSupplier.hpp> +#include <com/sun/star/container/XChild.hpp> +#include <comphelper/types.hxx> +#include <o3tl/safeint.hxx> +#include <rtl/ustring.hxx> +#include <tools/debug.hxx> +#include <svx/SvxShapeTypes.hxx> +#include <vcl/window.hxx> + +using namespace ::com::sun::star; +using namespace ::com::sun::star::accessibility; +using ::com::sun::star::uno::Reference; + +namespace accessibility { + +namespace +{ +void adjustIndexInParentOfShapes(ChildDescriptorListType& _rList) +{ + sal_Int32 i=0; + for (auto& rItem : _rList) + { + rItem.setIndexAtAccessibleShape(i); + ++i; + } +} +} + +// AccessibleChildrenManager +ChildrenManagerImpl::ChildrenManagerImpl ( + const uno::Reference<XAccessible>& rxParent, + const uno::Reference<drawing::XShapes>& rxShapeList, + const AccessibleShapeTreeInfo& rShapeTreeInfo, + AccessibleContextBase& rContext) + : ::cppu::WeakComponentImplHelper< + css::document::XEventListener, + css::view::XSelectionChangeListener>(maMutex), + mxShapeList (rxShapeList), + mxParent (rxParent), + maShapeTreeInfo (rShapeTreeInfo), + mrContext (rContext), + mpFocusedShape(nullptr) +{ +} + + +ChildrenManagerImpl::~ChildrenManagerImpl() +{ + DBG_ASSERT (rBHelper.bDisposed || rBHelper.bInDispose, + "~AccessibleDrawDocumentView: object has not been disposed"); +} + + +void ChildrenManagerImpl::Init() +{ + // Register as view::XSelectionChangeListener. + Reference<frame::XController> xController(maShapeTreeInfo.GetController()); + Reference<view::XSelectionSupplier> xSelectionSupplier ( + xController, uno::UNO_QUERY); + if (xSelectionSupplier.is()) + { + xController->addEventListener( + static_cast<document::XEventListener*>(this)); + + xSelectionSupplier->addSelectionChangeListener ( + static_cast<view::XSelectionChangeListener*>(this)); + } + + // Register at model as document::XEventListener. + if (maShapeTreeInfo.GetModelBroadcaster().is()) + maShapeTreeInfo.GetModelBroadcaster()->addEventListener ( + static_cast<document::XEventListener*>(this)); +} + + +long ChildrenManagerImpl::GetChildCount() const throw () +{ + return maVisibleChildren.size(); +} + + +css::uno::Reference<css::drawing::XShape> ChildrenManagerImpl::GetChildShape(long nIndex) +{ + uno::Reference<XAccessible> xAcc = GetChild(nIndex); + auto I = std::find_if(maVisibleChildren.begin(), maVisibleChildren.end(), + [&xAcc](const ChildDescriptor& rChild) { return rChild.mxAccessibleShape == xAcc; }); + if (I != maVisibleChildren.end()) + return I->mxShape; + return uno::Reference< drawing::XShape > (); +} + +/** Return the requested accessible child object. Create it if it is not + yet in the cache. +*/ +uno::Reference<XAccessible> + ChildrenManagerImpl::GetChild (long nIndex) +{ + // Check whether the given index is valid. + if (nIndex < 0 || o3tl::make_unsigned(nIndex) >= maVisibleChildren.size()) + throw lang::IndexOutOfBoundsException ( + "no accessible child with index " + OUString::number(nIndex), + mxParent); + + return GetChild (maVisibleChildren[nIndex],nIndex); +} + + +/** Return the requested accessible child object. Create it if it is not + yet in the cache. +*/ +uno::Reference<XAccessible> + ChildrenManagerImpl::GetChild (ChildDescriptor& rChildDescriptor,sal_Int32 _nIndex) +{ + if ( ! rChildDescriptor.mxAccessibleShape.is()) + { + SolarMutexGuard g; + // Make sure that the requested accessible object has not been + // created while locking the global mutex. + if ( ! rChildDescriptor.mxAccessibleShape.is()) + { + AccessibleShapeInfo aShapeInfo( + rChildDescriptor.mxShape, + mxParent, + this); + // Create accessible object that corresponds to the descriptor's + // shape. + rtl::Reference<AccessibleShape> pShape( + ShapeTypeHandler::Instance().CreateAccessibleObject ( + aShapeInfo, + maShapeTreeInfo)); + rChildDescriptor.mxAccessibleShape.set( + static_cast<uno::XWeak*>(pShape.get()), + uno::UNO_QUERY); + if ( pShape.is() ) + { + pShape->Init(); + pShape->setIndexInParent(_nIndex); + } + } + } + + return rChildDescriptor.mxAccessibleShape; +} + + +/** Find all shapes among the specified shapes that lie fully or partially + inside the visible area. Put those shapes into the cleared cache. The + corresponding accessible objects will be created on demand. + + At the moment, first all accessible objects are removed from the cache + and the appropriate listeners are informed of this. Next, the list is + created again. This should be optimized in the future to not remove and + create objects that will be in the list before and after the update + method. +*/ +void ChildrenManagerImpl::Update (bool bCreateNewObjectsOnDemand) +{ + if (maShapeTreeInfo.GetViewForwarder() == nullptr) + return; + tools::Rectangle aVisibleArea = maShapeTreeInfo.GetViewForwarder()->GetVisibleArea(); + + // 1. Create a local list of visible shapes. + ChildDescriptorListType aChildList; + CreateListOfVisibleShapes (aChildList); + + // 2. Merge the information that is already known about the visible + // shapes from the current list into the new list. + MergeAccessibilityInformation (aChildList); + + // 3. Replace the current list of visible shapes with the new one. Do + // the same with the visible area. + { + SolarMutexGuard g; + adjustIndexInParentOfShapes(aChildList); + + // Use swap to copy the contents of the new list in constant time. + maVisibleChildren.swap (aChildList); + + // aChildList now contains all the old children, while maVisibleChildren + // contains all the current children + + // 4. Find all shapes in the old list that are not in the current list, + // send appropriate events and remove the accessible shape. + + // Do this *after* we have set our new list of children, because + // removing a child may cause + + // ChildDescriptor::disposeAccessibleObject --> + // AccessibleContextBase::CommitChange --> + // AtkListener::notifyEvent -> + // AtkListener::handleChildRemoved -> + // AtkListener::updateChildList + // AccessibleDrawDocumentView::getAccessibleChildCount -> + // ChildrenManagerImpl::GetChildCount -> + // maVisibleChildren.size() + + // to be fired, and so the operations will take place on + // the list we are trying to replace + + RemoveNonVisibleChildren (maVisibleChildren, aChildList); + + aChildList.clear(); + + maVisibleArea = aVisibleArea; + } + + // 5. If the visible area has changed then send events that signal a + // change of their bounding boxes for all shapes that are members of + // both the current and the new list of visible shapes. + if (maVisibleArea != aVisibleArea) + SendVisibleAreaEvents (maVisibleChildren); + + // 6. If children have to be created immediately and not on demand then + // create the missing accessible objects now. + if (!bCreateNewObjectsOnDemand) + { + //operate on a copy of the list and restore it afterwards to guard + //against the pathological case where maVisibleChildren gets modified + //by other calls to this object while CreateAccessibilityObjects + //executes which can happen when java is disabled and the "enable-java" + //dialog appears during the instantiation of the linguistic components + //triggered by the creation of shapes belonging to the a11y objects + // + //i.e. launch start-center, launch impress with java disabled and + //a java-using linguistic component installed + maVisibleChildren.swap(aChildList); + CreateAccessibilityObjects(aChildList); + maVisibleChildren.swap(aChildList); + } +} + +void ChildrenManagerImpl::CreateListOfVisibleShapes ( + ChildDescriptorListType& raDescriptorList) +{ + SolarMutexGuard g; + + OSL_ASSERT (maShapeTreeInfo.GetViewForwarder() != nullptr); + + tools::Rectangle aVisibleArea = maShapeTreeInfo.GetViewForwarder()->GetVisibleArea(); + + // Add the visible shapes for which the accessible objects already exist. + for (const auto& rpShape : maAccessibleShapes) + { + if (rpShape.is()) + { + uno::Reference<XAccessibleComponent> xComponent ( + rpShape->getAccessibleContext(), uno::UNO_QUERY); + if (xComponent.is()) + { + // The bounding box of the object already is clipped to the + // visible area. The object is therefore visible if the + // bounding box has non-zero extensions. + awt::Rectangle aPixelBBox (xComponent->getBounds()); + if ((aPixelBBox.Width > 0) && (aPixelBBox.Height > 0)) + raDescriptorList.emplace_back(rpShape); + } + } + } + + // Add the visible shapes for which only the XShapes exist. + if (mxShapeList.is() && mxShapeList->hasElements()) + { + sal_Int32 nShapeCount = mxShapeList->getCount(); + raDescriptorList.reserve( nShapeCount ); + awt::Point aPos; + awt::Size aSize; + tools::Rectangle aBoundingBox; + uno::Reference<drawing::XShape> xShape; + for (sal_Int32 i=0; i<nShapeCount; ++i) + { + mxShapeList->getByIndex(i) >>= xShape; + aPos = xShape->getPosition(); + aSize = xShape->getSize(); + + aBoundingBox.SetLeft( aPos.X ); + aBoundingBox.SetTop( aPos.Y ); + aBoundingBox.SetRight( aPos.X + aSize.Width ); + aBoundingBox.SetBottom( aPos.Y + aSize.Height ); + + // Insert shape if it is visible, i.e. its bounding box overlaps + // the visible area. + if ( aBoundingBox.IsOver (aVisibleArea) ) + raDescriptorList.emplace_back(xShape); + } + } +} + +void ChildrenManagerImpl::RemoveNonVisibleChildren ( + const ChildDescriptorListType& rNewChildList, + ChildDescriptorListType& rOldChildList) +{ + // Iterate over list of formerly visible children and remove those that + // are not visible anymore, i.e. member of the new list of visible + // children. + for (auto& rChild : rOldChildList) + { + if (::std::find(rNewChildList.begin(), rNewChildList.end(), rChild) == rNewChildList.end()) + { + // The child is disposed when there is a UNO shape from which + // the accessible shape can be created when the shape becomes + // visible again. When there is no such UNO shape then simply + // reset the descriptor but keep the accessibility object. + if (rChild.mxShape.is()) + { + UnregisterAsDisposeListener (rChild.mxShape); + rChild.disposeAccessibleObject (mrContext); + } + else + { + AccessibleShape* pAccessibleShape = rChild.GetAccessibleShape(); + pAccessibleShape->ResetState (AccessibleStateType::VISIBLE); + rChild.mxAccessibleShape = nullptr; + } + } + } +} + +void ChildrenManagerImpl::MergeAccessibilityInformation ( + ChildDescriptorListType& raNewChildList) +{ + ChildDescriptorListType::const_iterator aStartVisibleChildren = maVisibleChildren.begin(); + ChildDescriptorListType::const_iterator aEndVisibleChildren = maVisibleChildren.end(); + + for (auto& rChild : raNewChildList) + { + ChildDescriptorListType::const_iterator aOldChildDescriptor = + std::find(aStartVisibleChildren, aEndVisibleChildren, rChild); + + // Copy accessible shape if that exists in the old descriptor. + if (aOldChildDescriptor != aEndVisibleChildren && + aOldChildDescriptor->mxAccessibleShape.is()) + { + rChild.mxAccessibleShape = aOldChildDescriptor->mxAccessibleShape; + rChild.mbCreateEventPending = false; + } + else + RegisterAsDisposeListener (rChild.mxShape); + } +} + +void ChildrenManagerImpl::SendVisibleAreaEvents ( + ChildDescriptorListType& raNewChildList) +{ + for (const auto& rChild : raNewChildList) + { + // Tell shape of changed visible area. To do this, fake a + // change of the view forwarder. (Actually we usually get here + // as a result of a change of the view forwarder). + AccessibleShape* pShape = rChild.GetAccessibleShape (); + if (pShape != nullptr) + pShape->ViewForwarderChanged(); + } +} + + +void ChildrenManagerImpl::CreateAccessibilityObjects ( + ChildDescriptorListType& raNewChildList) +{ + sal_Int32 nPos = 0; + for ( auto& rChild : raNewChildList) + { + // Create the associated accessible object when the flag says so and + // it does not yet exist. + if ( ! rChild.mxAccessibleShape.is() ) + GetChild (rChild, nPos); + if (rChild.mxAccessibleShape.is() && rChild.mbCreateEventPending) + { + rChild.mbCreateEventPending = false; + mrContext.CommitChange ( + AccessibleEventId::CHILD, + uno::makeAny(rChild.mxAccessibleShape), + uno::Any()); + } + ++nPos; + } +} + + +void ChildrenManagerImpl::AddShape (const Reference<drawing::XShape>& rxShape) +{ + if (rxShape.is()) + { + SolarMutexClearableGuard aGuard; + + // Test visibility of the shape. + tools::Rectangle aVisibleArea = maShapeTreeInfo.GetViewForwarder()->GetVisibleArea(); + awt::Point aPos = rxShape->getPosition(); + awt::Size aSize = rxShape->getSize(); + + tools::Rectangle aBoundingBox ( + aPos.X, + aPos.Y, + aPos.X + aSize.Width, + aPos.Y + aSize.Height); + + // Add the shape only when it belongs to the list of shapes stored + // in mxShapeList (which is either a page or a group shape). + Reference<container::XChild> xChild (rxShape, uno::UNO_QUERY); + if (xChild.is()) + { + Reference<drawing::XShapes> xParent (xChild->getParent(), uno::UNO_QUERY); + if (xParent == mxShapeList) + if (aBoundingBox.IsOver (aVisibleArea)) + { + // Add shape to list of visible shapes. + maVisibleChildren.emplace_back(rxShape); + + // Create accessibility object. + ChildDescriptor& rDescriptor = maVisibleChildren.back(); + GetChild (rDescriptor, maVisibleChildren.size()-1); + + // Inform listeners about new child. + uno::Any aNewShape; + aNewShape <<= rDescriptor.mxAccessibleShape; + aGuard.clear(); + mrContext.CommitChange ( + AccessibleEventId::CHILD, + aNewShape, + uno::Any()); + RegisterAsDisposeListener(rxShape); + } + } + } +} + + +void ChildrenManagerImpl::RemoveShape (const Reference<drawing::XShape>& rxShape) +{ + if (rxShape.is()) + { + SolarMutexGuard g; + + // Search shape in list of visible children. + ChildDescriptorListType::iterator I ( + ::std::find (maVisibleChildren.begin(), maVisibleChildren.end(), + ChildDescriptor (rxShape))); + if (I != maVisibleChildren.end()) + { + // Remove descriptor from that list. + Reference<XAccessible> xHoldAlive(I->mxAccessibleShape); + + UnregisterAsDisposeListener (I->mxShape); + // Dispose the accessible object. + I->disposeAccessibleObject (mrContext); + + // Now we can safely remove the child descriptor and thus + // invalidate the iterator. + maVisibleChildren.erase (I); + + adjustIndexInParentOfShapes(maVisibleChildren); + } + } +} + + +void ChildrenManagerImpl::SetShapeList (const css::uno::Reference<css::drawing::XShapes>& xShapeList) +{ + mxShapeList = xShapeList; +} + + +void ChildrenManagerImpl::AddAccessibleShape (css::uno::Reference<css::accessibility::XAccessible> const & shape) +{ + assert(shape.is()); + maAccessibleShapes.push_back (shape); +} + + +void ChildrenManagerImpl::ClearAccessibleShapeList() +{ + // Copy the list of (visible) shapes to local lists and clear the + // originals. + ChildDescriptorListType aLocalVisibleChildren; + aLocalVisibleChildren.swap(maVisibleChildren); + AccessibleShapeList aLocalAccessibleShapes; + aLocalAccessibleShapes.swap(maAccessibleShapes); + + // Tell the listeners that all children are gone. + mrContext.CommitChange ( + AccessibleEventId::INVALIDATE_ALL_CHILDREN, + uno::Any(), + uno::Any()); + + // Now the objects in the local lists can be safely disposed without + // having problems with callers that want to update their child lists. + + // Clear the list of visible accessible objects. Objects not created on + // demand for XShapes are treated below. + for (auto& rChild : aLocalVisibleChildren) + if ( rChild.mxAccessibleShape.is() && rChild.mxShape.is() ) + { + ::comphelper::disposeComponent(rChild.mxAccessibleShape); + rChild.mxAccessibleShape = nullptr; + } + + // Dispose all objects in the accessible shape list. + for (auto& rpShape : aLocalAccessibleShapes) + if (rpShape.is()) + { + // Dispose the object. + ::comphelper::disposeComponent(rpShape); + rpShape = nullptr; + } +} + + +/** If the broadcasters change at which this object is registered then + unregister at old and register at new broadcasters. +*/ +void ChildrenManagerImpl::SetInfo (const AccessibleShapeTreeInfo& rShapeTreeInfo) +{ + // Remember the current broadcasters and exchange the shape tree info. + Reference<document::XEventBroadcaster> xCurrentBroadcaster; + Reference<frame::XController> xCurrentController; + Reference<view::XSelectionSupplier> xCurrentSelectionSupplier; + { + SolarMutexGuard g; + xCurrentBroadcaster = maShapeTreeInfo.GetModelBroadcaster(); + xCurrentController = maShapeTreeInfo.GetController(); + xCurrentSelectionSupplier.set( xCurrentController, uno::UNO_QUERY); + maShapeTreeInfo = rShapeTreeInfo; + } + + // Move registration to new model. + if (maShapeTreeInfo.GetModelBroadcaster() != xCurrentBroadcaster) + { + // Register at new broadcaster. + if (maShapeTreeInfo.GetModelBroadcaster().is()) + maShapeTreeInfo.GetModelBroadcaster()->addEventListener ( + static_cast<document::XEventListener*>(this)); + + // Unregister at old broadcaster. + if (xCurrentBroadcaster.is()) + xCurrentBroadcaster->removeEventListener ( + static_cast<document::XEventListener*>(this)); + } + + // Move registration to new selection supplier. + Reference<frame::XController> xNewController(maShapeTreeInfo.GetController()); + Reference<view::XSelectionSupplier> xNewSelectionSupplier ( + xNewController, uno::UNO_QUERY); + if (xNewSelectionSupplier != xCurrentSelectionSupplier) + { + // Register at new broadcaster. + if (xNewSelectionSupplier.is()) + { + xNewController->addEventListener( + static_cast<document::XEventListener*>(this)); + + xNewSelectionSupplier->addSelectionChangeListener ( + static_cast<view::XSelectionChangeListener*>(this)); + } + + // Unregister at old broadcaster. + if (xCurrentSelectionSupplier.is()) + { + xCurrentSelectionSupplier->removeSelectionChangeListener ( + static_cast<view::XSelectionChangeListener*>(this)); + + xCurrentController->removeEventListener( + static_cast<document::XEventListener*>(this)); + } + } +} + +// lang::XEventListener +void SAL_CALL + ChildrenManagerImpl::disposing (const lang::EventObject& rEventObject) +{ + if (rEventObject.Source == maShapeTreeInfo.GetModelBroadcaster() + || rEventObject.Source == maShapeTreeInfo.GetController()) + { + impl_dispose(); + } + + // Handle disposing UNO shapes. + else + { + Reference<drawing::XShape> xShape (rEventObject.Source, uno::UNO_QUERY); + + // Find the descriptor for the given shape. + ChildDescriptorListType::iterator I ( + ::std::find (maVisibleChildren.begin(), maVisibleChildren.end(), + ChildDescriptor (xShape))); + if (I != maVisibleChildren.end()) + { + // Clear the descriptor. + I->disposeAccessibleObject (mrContext); + I->mxShape = nullptr; + } + } +} + +// document::XEventListener +/** Listen for new and removed shapes. +*/ +void SAL_CALL + ChildrenManagerImpl::notifyEvent ( + const document::EventObject& rEventObject) +{ + if (rEventObject.EventName == "ShapeInserted") + AddShape (Reference<drawing::XShape>(rEventObject.Source, uno::UNO_QUERY)); + else if (rEventObject.EventName == "ShapeRemoved") + RemoveShape (Reference<drawing::XShape>(rEventObject.Source, uno::UNO_QUERY)); + // else ignore unknown event. +} + +// view::XSelectionChangeListener +void SAL_CALL + ChildrenManagerImpl::selectionChanged (const lang::EventObject& /*rEvent*/) +{ + UpdateSelection (); +} + + +void ChildrenManagerImpl::impl_dispose() +{ + Reference<frame::XController> xController(maShapeTreeInfo.GetController()); + // Remove from broadcasters. + try + { + Reference<view::XSelectionSupplier> xSelectionSupplier ( + xController, uno::UNO_QUERY); + if (xSelectionSupplier.is()) + { + xSelectionSupplier->removeSelectionChangeListener ( + static_cast<view::XSelectionChangeListener*>(this)); + } + } + catch( uno::RuntimeException&) + {} + + try + { + if (xController.is()) + xController->removeEventListener( + static_cast<document::XEventListener*>(this)); + } + catch( uno::RuntimeException&) + {} + + maShapeTreeInfo.SetController (nullptr); + + try + { + // Remove from broadcaster. + if (maShapeTreeInfo.GetModelBroadcaster().is()) + maShapeTreeInfo.GetModelBroadcaster()->removeEventListener ( + static_cast<document::XEventListener*>(this)); + maShapeTreeInfo.SetModelBroadcaster (nullptr); + } + catch( uno::RuntimeException& ) + {} + + ClearAccessibleShapeList (); + SetShapeList (nullptr); +} + + +void SAL_CALL ChildrenManagerImpl::disposing() +{ + impl_dispose(); +} + +// IAccessibleViewForwarderListener +void ChildrenManagerImpl::ViewForwarderChanged() +{ + Update(false); +} + +// IAccessibleParent +bool ChildrenManagerImpl::ReplaceChild ( + AccessibleShape* pCurrentChild, + const css::uno::Reference< css::drawing::XShape >& _rxShape, + const long /*_nIndex*/, + const AccessibleShapeTreeInfo& _rShapeTreeInfo) +{ + // Iterate over the visible children. If one of them has an already + // created accessible object that matches pCurrentChild then replace + // it. Otherwise the child to replace is either not in the list or has + // not ye been created (and is therefore not in the list, too) and a + // replacement is not necessary. + auto I = std::find_if(maVisibleChildren.begin(), maVisibleChildren.end(), + [&pCurrentChild](const ChildDescriptor& rChild) { return rChild.GetAccessibleShape() == pCurrentChild; }); + + if (I != maVisibleChildren.end()) + { + // Dispose the current child and send an event about its deletion. + pCurrentChild->dispose(); + mrContext.CommitChange ( + AccessibleEventId::CHILD, + uno::Any(), + uno::makeAny (I->mxAccessibleShape)); + + // Replace with replacement and send an event about existence + // of the new child. + AccessibleShapeInfo aShapeInfo( _rxShape, pCurrentChild->getAccessibleParent(), this ); + // create the new child + rtl::Reference<AccessibleShape> pNewChild(ShapeTypeHandler::Instance().CreateAccessibleObject ( + aShapeInfo, + _rShapeTreeInfo + )); + if ( pNewChild.is() ) + pNewChild->Init(); + + I->mxAccessibleShape = pNewChild.get(); + mrContext.CommitChange ( + AccessibleEventId::CHILD, + uno::makeAny (I->mxAccessibleShape), + uno::Any()); + + return true; + } + + // When not found among the visible children we have to search the list + // of accessible shapes. This is not yet implemented. + return false; +} + +// Add the impl method for IAccessibleParent interface +AccessibleControlShape * ChildrenManagerImpl::GetAccControlShapeFromModel(css::beans::XPropertySet* pSet) +{ + sal_Int32 count = GetChildCount(); + for (sal_Int32 index=0;index<count;index++) + { + AccessibleShape* pAccShape = maVisibleChildren[index].GetAccessibleShape(); + if (pAccShape && ::accessibility::ShapeTypeHandler::Instance().GetTypeId(pAccShape->GetXShape()) == DRAWING_CONTROL) + { + auto* pCtlAccShape = static_cast<::accessibility::AccessibleControlShape*>(pAccShape); + if (pCtlAccShape->GetControlModel() == pSet) + return pCtlAccShape; + } + } + return nullptr; +} +uno::Reference<XAccessible> + ChildrenManagerImpl::GetAccessibleCaption (const uno::Reference<drawing::XShape>& xShape) +{ + auto I = std::find_if(maVisibleChildren.begin(), maVisibleChildren.end(), + [&xShape](const ChildDescriptor& rChild) { return rChild.mxShape.get() == xShape.get(); }); + if (I != maVisibleChildren.end()) + return I->mxAccessibleShape; + return uno::Reference<XAccessible> (); +} + +/** Update the <const>SELECTED</const> and the <const>FOCUSED</const> state + of all visible children. Maybe this should be changed to all children. + + Iterate over all descriptors of visible accessible shapes and look them + up in the selection. + + If there is no valid controller then all shapes are deselected and + unfocused. If the controller's frame is not active then all shapes are + unfocused. +*/ +void ChildrenManagerImpl::UpdateSelection() +{ + Reference<frame::XController> xController(maShapeTreeInfo.GetController()); + Reference<view::XSelectionSupplier> xSelectionSupplier ( + xController, uno::UNO_QUERY); + + // Try to cast the selection both to a multi selection and to a single + // selection. + Reference<container::XIndexAccess> xSelectedShapeAccess; + Reference<drawing::XShape> xSelectedShape; + if (xSelectionSupplier.is()) + { + xSelectedShapeAccess.set( xSelectionSupplier->getSelection(), uno::UNO_QUERY); + xSelectedShape.set( xSelectionSupplier->getSelection(), uno::UNO_QUERY); + } + + // Remember the current and new focused shape. + AccessibleShape* pCurrentlyFocusedShape = nullptr; + AccessibleShape* pNewFocusedShape = nullptr; + typedef std::pair< AccessibleShape* , sal_Bool > PAIR_SHAPE;//sal_Bool Selected,UnSelected. + typedef std::vector< PAIR_SHAPE > VEC_SHAPE; + VEC_SHAPE vecSelect; + int nAddSelect=0; + bool bHasSelectedShape=false; + for (const auto& rChild : maVisibleChildren) + { + AccessibleShape* pAccessibleShape = rChild.GetAccessibleShape(); + if (rChild.mxAccessibleShape.is() && rChild.mxShape.is() && pAccessibleShape!=nullptr) + { + short nRole = pAccessibleShape->getAccessibleRole(); + bool bDrawShape = ( + nRole == AccessibleRole::GRAPHIC || + nRole == AccessibleRole::EMBEDDED_OBJECT || + nRole == AccessibleRole::SHAPE || + nRole == AccessibleRole::IMAGE_MAP || + nRole == AccessibleRole::TABLE_CELL || + nRole == AccessibleRole::TABLE ); + bool bShapeIsSelected = false; + + // Look up the shape in the (single or multi-) selection. + if (xSelectedShape.is()) + { + if (rChild.mxShape == xSelectedShape) + { + bShapeIsSelected = true; + pNewFocusedShape = pAccessibleShape; + } + } + else if (xSelectedShapeAccess.is()) + { + sal_Int32 nCount=xSelectedShapeAccess->getCount(); + for (sal_Int32 i=0; i<nCount&&!bShapeIsSelected; i++) + if (xSelectedShapeAccess->getByIndex(i) == rChild.mxShape) + { + bShapeIsSelected = true; + // In a multi-selection no shape has the focus. + if (nCount == 1) + pNewFocusedShape = pAccessibleShape; + } + } + + // Set or reset the SELECTED state. + if (bShapeIsSelected) + { + if (pAccessibleShape->SetState (AccessibleStateType::SELECTED)) + { + if (bDrawShape) + { + vecSelect.emplace_back(pAccessibleShape,true); + ++nAddSelect; + } + } + else + {//Selected not change,has selected shape before + bHasSelectedShape=true; + } + } + else + //pAccessibleShape->ResetState (AccessibleStateType::SELECTED); + { + if(pAccessibleShape->ResetState (AccessibleStateType::SELECTED)) + { + if(bDrawShape) + { + vecSelect.emplace_back(pAccessibleShape,false); + } + } + } + // Does the shape have the current selection? + if (pAccessibleShape->GetState (AccessibleStateType::FOCUSED)) + pCurrentlyFocusedShape = pAccessibleShape; + } + } + + vcl::Window *pParentWindow = maShapeTreeInfo.GetWindow(); + bool bShapeActive= false; + // For table cell, the table's parent must be checked to make sure it has focus. + if (pParentWindow) + { + vcl::Window *pPWindow = pParentWindow->GetParent(); + if (pParentWindow->HasFocus() || (pPWindow && pPWindow->HasFocus())) + bShapeActive =true; + } + // Move focus from current to newly focused shape. + if (pCurrentlyFocusedShape != pNewFocusedShape) + { + if (pCurrentlyFocusedShape != nullptr) + pCurrentlyFocusedShape->ResetState (AccessibleStateType::FOCUSED); + if (pNewFocusedShape != nullptr && bShapeActive) + pNewFocusedShape->SetState (AccessibleStateType::FOCUSED); + } + + if (nAddSelect >= 10 )//fire selection within + { + mrContext.CommitChange(AccessibleEventId::SELECTION_CHANGED_WITHIN,uno::Any(),uno::Any()); + nAddSelect =0 ;//not fire selection event + } + for (VEC_SHAPE::reverse_iterator vi = vecSelect.rbegin(), aEndVecSelect = vecSelect.rend(); vi != aEndVecSelect ;++vi) + { + PAIR_SHAPE &pairShape= *vi; + Reference< XAccessible > xShape(pairShape.first); + uno::Any anyShape; + anyShape <<= xShape; + + if (pairShape.second)//Selection add + { + if (bHasSelectedShape) + { + if ( nAddSelect > 0 ) + { + mrContext.CommitChange(AccessibleEventId::SELECTION_CHANGED_ADD,anyShape,uno::Any()); + } + } + else + { + //if has not selected shape ,first selected shape is fire selection event; + if (nAddSelect > 0 ) + { + mrContext.CommitChange(AccessibleEventId::SELECTION_CHANGED,anyShape,uno::Any()); + } + if (nAddSelect > 1 )//check other selected shape fire selection add event + { + bHasSelectedShape=true; + } + } + } + else //selection remove + { + mrContext.CommitChange(AccessibleEventId::SELECTION_CHANGED_REMOVE,anyShape,uno::Any()); + } + } + + // Remember whether there is a shape that now has the focus. + mpFocusedShape = pNewFocusedShape; +} + + +bool ChildrenManagerImpl::HasFocus() const +{ + return mpFocusedShape != nullptr; +} + + +void ChildrenManagerImpl::RemoveFocus() +{ + if (mpFocusedShape != nullptr) + { + mpFocusedShape->ResetState (AccessibleStateType::FOCUSED); + mpFocusedShape = nullptr; + } +} + + +void ChildrenManagerImpl::RegisterAsDisposeListener ( + const Reference<drawing::XShape>& xShape) +{ + Reference<lang::XComponent> xComponent (xShape, uno::UNO_QUERY); + if (xComponent.is()) + xComponent->addEventListener ( + static_cast<document::XEventListener*>(this)); +} + + +void ChildrenManagerImpl::UnregisterAsDisposeListener ( + const Reference<drawing::XShape>& xShape) +{ + Reference<lang::XComponent> xComponent (xShape, uno::UNO_QUERY); + if (xComponent.is()) + xComponent->removeEventListener ( + static_cast<document::XEventListener*>(this)); +} + +// AccessibleChildDescriptor +ChildDescriptor::ChildDescriptor (const Reference<drawing::XShape>& xShape) + : mxShape (xShape), + mbCreateEventPending (true) +{ + // Empty. +} + + +ChildDescriptor::ChildDescriptor (const Reference<XAccessible>& rxAccessibleShape) + : mxAccessibleShape (rxAccessibleShape), + mbCreateEventPending (true) +{ + // Make sure that the accessible object has the <const>VISIBLE</const> + // state set. + AccessibleShape* pAccessibleShape = GetAccessibleShape(); + pAccessibleShape->SetState (AccessibleStateType::VISIBLE); +} + +AccessibleShape* ChildDescriptor::GetAccessibleShape() const +{ + return static_cast<AccessibleShape*> (mxAccessibleShape.get()); +} + +void ChildDescriptor::setIndexAtAccessibleShape(sal_Int32 _nIndex) +{ + AccessibleShape* pShape = GetAccessibleShape(); + if ( pShape ) + pShape->setIndexInParent(_nIndex); +} + + +void ChildDescriptor::disposeAccessibleObject (AccessibleContextBase& rParent) +{ + if (mxAccessibleShape.is()) + { + // Send event that the shape has been removed. + uno::Any aOldValue; + aOldValue <<= mxAccessibleShape; + rParent.CommitChange ( + AccessibleEventId::CHILD, + uno::Any(), + aOldValue); + + // Dispose and remove the object. + Reference<lang::XComponent> xComponent (mxAccessibleShape, uno::UNO_QUERY); + if (xComponent.is()) + xComponent->dispose (); + + mxAccessibleShape = nullptr; + } +} + + +} // end of namespace accessibility + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |