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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 .
+ */
+
+
+#include <framework/saxeventkeeperimpl.hxx>
+#include "buffernode.hxx"
+#include "elementmark.hxx"
+#include "elementcollector.hxx"
+#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
+#include <com/sun/star/xml/crypto/sax/ConstOfSecurityId.hpp>
+#include <com/sun/star/xml/wrapper/XXMLDocumentWrapper.hpp>
+#include <com/sun/star/xml/csax/XCompressedDocumentHandler.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <osl/diagnose.h>
+#include <rtl/ustrbuf.hxx>
+
+#define IMPLEMENTATION_NAME "com.sun.star.xml.security.framework.SAXEventKeeperImpl"
+
+SAXEventKeeperImpl::SAXEventKeeperImpl( )
+ :m_pCurrentBufferNode(nullptr),
+ m_nNextElementMarkId(1),
+ m_pNewBlocker(nullptr),
+ m_pCurrentBlockingBufferNode(nullptr),
+ m_bIsReleasing(false),
+ m_bIsForwarding(false)
+{
+ m_vElementMarkBuffers.reserve(2);
+ m_vNewElementCollectors.reserve(2);
+ m_vReleasedElementMarkBuffers.reserve(2);
+}
+
+SAXEventKeeperImpl::~SAXEventKeeperImpl()
+{
+ /*
+ * delete the BufferNode tree
+ */
+ m_pRootBufferNode.reset();
+
+ m_pCurrentBufferNode = m_pCurrentBlockingBufferNode = nullptr;
+
+ /*
+ * delete all unfreed ElementMarks
+ */
+ m_vNewElementCollectors.clear();
+ m_pNewBlocker = nullptr;
+}
+
+void SAXEventKeeperImpl::setCurrentBufferNode(BufferNode* pBufferNode)
+/****** SAXEventKeeperImpl/setCurrentBufferNode ******************************
+ *
+ * NAME
+ * setCurrentBufferNode -- set a new active BufferNode.
+ *
+ * SYNOPSIS
+ * setCurrentBufferNode( pBufferNode );
+ *
+ * FUNCTION
+ * connects this BufferNode into the BufferNode tree as a child of the
+ * current active BufferNode. Then makes this BufferNode as the current
+ * active BufferNode.
+ * If the previous active BufferNode points to the root
+ * BufferNode, which means that no buffering operation was proceeding,
+ * then notifies the status change listener that buffering operation
+ * will begin at once.
+ *
+ * INPUTS
+ * pBufferNode - a BufferNode which will be the new active BufferNode
+ ******************************************************************************/
+{
+ if (pBufferNode != m_pCurrentBufferNode)
+ {
+ if ( m_pCurrentBufferNode == m_pRootBufferNode.get() &&
+ m_xSAXEventKeeperStatusChangeListener.is())
+ {
+ m_xSAXEventKeeperStatusChangeListener->collectionStatusChanged(true);
+ }
+
+ if (pBufferNode->getParent() == nullptr)
+ {
+ m_pCurrentBufferNode->addChild(std::unique_ptr<BufferNode>(pBufferNode));
+ pBufferNode->setParent(m_pCurrentBufferNode);
+ }
+
+ m_pCurrentBufferNode = pBufferNode;
+ }
+}
+
+BufferNode* SAXEventKeeperImpl::addNewElementMarkBuffers()
+/****** SAXEventKeeperImpl/addNewElementMarkBuffers **************************
+ *
+ * NAME
+ * addNewElementMarkBuffers -- add new ElementCollectors and new Blocker.
+ *
+ * SYNOPSIS
+ * pBufferNode = addNewElementMarkBuffers( );
+ *
+ * FUNCTION
+ * if there are new ElementCollector or new Blocker to be added, then
+ * connect all of them with the current BufferNode. In case of the
+ * current BufferNode doesn't exist, creates one.
+ * Clears up the new ElementCollector list and the new Blocker pointer.
+ *
+ * RESULT
+ * pBufferNode - the BufferNode that has been connected with both new
+ * ElementCollectors and new Blocker.
+ ******************************************************************************/
+{
+ BufferNode* pBufferNode = nullptr;
+
+ if (m_pNewBlocker || !m_vNewElementCollectors.empty() )
+ {
+ /*
+ * When the current BufferNode is right pointing to the current
+ * working element in the XMLDocumentWrapper component, then
+ * no new BufferNode is needed to create.
+ * This situation can only happen in the "Forwarding" mode.
+ */
+ if ( (m_pCurrentBufferNode != nullptr) &&
+ (m_xXMLDocument->isCurrent(m_pCurrentBufferNode->getXMLElement())))
+ {
+ pBufferNode = m_pCurrentBufferNode;
+ }
+ else
+ {
+ pBufferNode = new BufferNode(m_xXMLDocument->getCurrentElement());
+ }
+
+ if (m_pNewBlocker != nullptr)
+ {
+ pBufferNode->setBlocker(m_pNewBlocker);
+
+ /*
+ * If no blocking before, then notify the status change listener that
+ * the SAXEventKeeper has entered "blocking" status, during which, no
+ * SAX events will be forwarded to the next document handler.
+ */
+ if (m_pCurrentBlockingBufferNode == nullptr)
+ {
+ m_pCurrentBlockingBufferNode = pBufferNode;
+
+ if (m_xSAXEventKeeperStatusChangeListener.is())
+ {
+ m_xSAXEventKeeperStatusChangeListener->blockingStatusChanged(true);
+ }
+ }
+
+ m_pNewBlocker = nullptr;
+ }
+
+ for( const auto& i : m_vNewElementCollectors )
+ {
+ pBufferNode->addElementCollector(i);
+ }
+ m_vNewElementCollectors.clear();
+ }
+
+ return pBufferNode;
+}
+
+ElementMark* SAXEventKeeperImpl::findElementMarkBuffer(sal_Int32 nId) const
+/****** SAXEventKeeperImpl/findElementMarkBuffer *****************************
+ *
+ * NAME
+ * findElementMarkBuffer -- finds an ElementMark.
+ *
+ * SYNOPSIS
+ * pElementMark = findElementMarkBuffer( nId );
+ *
+ * FUNCTION
+ * searches an ElementMark with the particular Id in the ElementMark
+ * list.
+ *
+ * INPUTS
+ * nId - the Id of the ElementMark to be searched.
+ *
+ * RESULT
+ * pElementMark - the ElementMark with the particular Id, or NULL when
+ * no such Id exists.
+ ******************************************************************************/
+{
+ ElementMark* pElementMark = nullptr;
+
+ for( auto&& ii : m_vElementMarkBuffers )
+ {
+ if ( nId == ii->getBufferId())
+ {
+ pElementMark = const_cast<ElementMark*>(ii.get());
+ break;
+ }
+ }
+
+ return pElementMark;
+}
+
+void SAXEventKeeperImpl::removeElementMarkBuffer(sal_Int32 nId)
+/****** SAXEventKeeperImpl/removeElementMarkBuffer ***************************
+ *
+ * NAME
+ * removeElementMarkBuffer -- removes an ElementMark
+ *
+ * SYNOPSIS
+ * removeElementMarkBuffer( nId );
+ *
+ * FUNCTION
+ * removes an ElementMark with the particular Id in the ElementMark list.
+ *
+ * INPUTS
+ * nId - the Id of the ElementMark to be removed.
+ ******************************************************************************/
+{
+ auto ii = std::find_if(m_vElementMarkBuffers.begin(), m_vElementMarkBuffers.end(),
+ [nId](std::unique_ptr<const ElementMark>& rElementMark) { return nId == rElementMark->getBufferId(); }
+ );
+ if (ii == m_vElementMarkBuffers.end())
+ return;
+
+ /*
+ * checks whether this ElementMark still in the new ElementCollect array
+ */
+ auto jj = std::find_if(m_vNewElementCollectors.begin(), m_vNewElementCollectors.end(),
+ [&ii](const ElementCollector* pElementCollector) { return ii->get() == pElementCollector; }
+ );
+ if (jj != m_vNewElementCollectors.end())
+ m_vNewElementCollectors.erase(jj);
+
+ /*
+ * checks whether this ElementMark is the new Blocker
+ */
+ if (ii->get() == m_pNewBlocker)
+ {
+ m_pNewBlocker = nullptr;
+ }
+
+ m_vElementMarkBuffers.erase( ii );
+}
+
+OUString SAXEventKeeperImpl::printBufferNode(
+ BufferNode const * pBufferNode, sal_Int32 nIndent) const
+/****** SAXEventKeeperImpl/printBufferNode ***********************************
+ *
+ * NAME
+ * printBufferNode -- retrieves the information of a BufferNode and its
+ * branch.
+ *
+ * SYNOPSIS
+ * info = printBufferNode( pBufferNode, nIndent );
+ *
+ * FUNCTION
+ * all retrieved information includes:
+ * 1. whether it is the current BufferNode;
+ * 2. whether it is the current blocking BufferNode;
+ * 3. the name of the parent element;
+ * 4. the name of this element;
+ * 5. all ElementCollectors working on this BufferNode;
+ * 6. the Blocker working on this BufferNode;
+ * 7. all child BufferNodes' information.
+ *
+ * INPUTS
+ * pBufferNode - the BufferNode from where information will be retrieved.
+ * nIndent - how many space characters prefixed before the output
+ * message.
+ *
+ * RESULT
+ * info - the information string
+ ******************************************************************************/
+{
+ OUStringBuffer rc;
+
+ for ( int i=0; i<nIndent; ++i )
+ {
+ rc.append(" ");
+ }
+
+ if (pBufferNode == m_pCurrentBufferNode)
+ {
+ rc.append("[%]");
+ }
+
+ if (pBufferNode == m_pCurrentBlockingBufferNode)
+ {
+ rc.append("[B]");
+ }
+
+ rc.append(" ").append(m_xXMLDocument->getNodeName(pBufferNode->getXMLElement()));
+
+ BufferNode* pParent = const_cast<BufferNode*>(pBufferNode->getParent());
+ if (pParent != nullptr)
+ {
+ rc.append("[").append(m_xXMLDocument->getNodeName(pParent->getXMLElement())).append("]");
+ }
+
+ rc.append(":EC=").append(pBufferNode->printChildren()).append(" BR=");
+
+ ElementMark * pBlocker = pBufferNode->getBlocker();
+ if (pBlocker != nullptr)
+ {
+ rc.append(OUString::number( pBlocker->getBufferId() )).append("(SecId=")
+ .append(OUString::number( pBlocker->getSecurityId() )).append(") ");
+ }
+ rc.append("\n");
+
+ std::vector< std::unique_ptr<BufferNode> > const & vChildren = pBufferNode->getChildren();
+ for( const auto& jj : vChildren )
+ {
+ rc.append(printBufferNode(jj.get(), nIndent+4));
+ }
+
+ return rc.makeStringAndClear();
+}
+
+css::uno::Sequence< css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > >
+ SAXEventKeeperImpl::collectChildWorkingElement(BufferNode const * pBufferNode)
+/****** SAXEventKeeperImpl/collectChildWorkingElement ************************
+ *
+ * NAME
+ * collectChildWorkingElement -- collects a BufferNode's all child
+ * Elements.
+ *
+ * SYNOPSIS
+ * list = collectChildWorkingElement( pBufferNode );
+ *
+ * INPUTS
+ * pBufferNode - the BufferNode whose child Elements will be collected.
+ *
+ * RESULT
+ * list - the child Elements list.
+ ******************************************************************************/
+{
+ std::vector< std::unique_ptr<BufferNode> > const & vChildren = pBufferNode->getChildren();
+
+ css::uno::Sequence < css::uno::Reference<
+ css::xml::wrapper::XXMLElementWrapper > > aChildrenCollection ( vChildren.size());
+
+ sal_Int32 nIndex = 0;
+ for( const auto& i : vChildren )
+ {
+ aChildrenCollection[nIndex] = i->getXMLElement();
+ nIndex++;
+ }
+
+ return aChildrenCollection;
+}
+
+void SAXEventKeeperImpl::smashBufferNode(
+ BufferNode* pBufferNode, bool bClearRoot) const
+/****** SAXEventKeeperImpl/smashBufferNode ***********************************
+ *
+ * NAME
+ * smashBufferNode -- removes a BufferNode along with its working
+ * element.
+ *
+ * SYNOPSIS
+ * smashBufferNode( pBufferNode, bClearRoot );
+ *
+ * FUNCTION
+ * removes the BufferNode's working element from the DOM document, while
+ * reserves all ancestor paths for its child BufferNodes.
+ * when any of the BufferNode's ancestor element is useless, removes it
+ * too.
+ * removes the BufferNode from the BufferNode tree.
+ *
+ * INPUTS
+ * pBufferNode - the BufferNode to be removed
+ * bClearRoot - whether the root element also needs to be cleared up.
+ *
+ * NOTES
+ * when removing a Blocker's BufferNode, the bClearRoot flag should be
+ * true. Because a Blocker can buffer many SAX events which are not used
+ * by any other ElementCollector or Blocker.
+ * When the bClearRoot is set to true, the root BufferNode will be first
+ * cleared, with a stop flag setting at the next Blocking BufferNode. This
+ * operation can delete all useless buffered SAX events which are only
+ * needed by the Blocker to be deleted.
+ ******************************************************************************/
+{
+ if (!pBufferNode->hasAnything())
+ {
+ BufferNode* pParent = const_cast<BufferNode*>(pBufferNode->getParent());
+
+ /*
+ * delete the XML data
+ */
+ if (pParent == m_pRootBufferNode.get())
+ {
+ bool bIsNotBlocking = (m_pCurrentBlockingBufferNode == nullptr);
+ bool bIsBlockInside = false;
+ bool bIsBlockingAfterward = false;
+
+ /*
+ * If this is a blocker, then remove any out-element data
+ * which caused by blocking. The removal process will stop
+ * at the next blocker to avoid removing any useful data.
+ */
+ if (bClearRoot)
+ {
+ css::uno::Sequence< css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > >
+ aChildElements = collectChildWorkingElement(m_pRootBufferNode.get());
+
+ /*
+ * the clearUselessData only clearup the content in the
+ * node, not the node itself.
+ */
+ m_xXMLDocument->clearUselessData(m_pRootBufferNode->getXMLElement(),
+ aChildElements,
+ bIsNotBlocking?nullptr:
+ (m_pCurrentBlockingBufferNode->getXMLElement()));
+
+ /*
+ * remove the node if it is empty, then if its parent is also
+ * empty, remove it, then if the next parent is also empty,
+ * remove it,..., until parent become null.
+ */
+ m_xXMLDocument->collapse( m_pRootBufferNode->getXMLElement() );
+ }
+
+ /*
+ * if blocking, check the relationship between this BufferNode and
+ * the current blocking BufferNode.
+ */
+ if ( !bIsNotBlocking )
+ {
+ /*
+ * the current blocking BufferNode is a descendant of this BufferNode.
+ */
+ bIsBlockInside = (nullptr != pBufferNode->isAncestor(m_pCurrentBlockingBufferNode));
+
+ /*
+ * the current blocking BufferNode locates behind this BufferNode in tree
+ * order.
+ */
+ bIsBlockingAfterward = pBufferNode->isPrevious(m_pCurrentBlockingBufferNode);
+ }
+
+ /*
+ * this BufferNode's working element needs to be deleted only when
+ * 1. there is no blocking, or
+ * 2. the current blocking BufferNode is a descendant of this BufferNode,
+ * (then in the BufferNode's working element, the useless data before the blocking
+ * element should be deleted.) or
+ * 3. the current blocking BufferNode is locates behind this BufferNode in tree,
+ * (then the useless data between the blocking element and the working element
+ * should be deleted.).
+ * Otherwise, this working element should not be deleted.
+ */
+ if ( bIsNotBlocking || bIsBlockInside || bIsBlockingAfterward )
+ {
+ css::uno::Sequence< css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > >
+ aChildElements = collectChildWorkingElement(pBufferNode);
+
+ /*
+ * the clearUselessData only clearup the content in the
+ * node, not the node itself.
+ */
+ m_xXMLDocument->clearUselessData(pBufferNode->getXMLElement(),
+ aChildElements,
+ bIsBlockInside?(m_pCurrentBlockingBufferNode->getXMLElement()):
+ nullptr);
+
+ /*
+ * remove the node if it is empty, then if its parent is also
+ * empty, remove it, then if the next parent is also empty,
+ * remove it,..., until parent become null.
+ */
+ m_xXMLDocument->collapse( pBufferNode->getXMLElement() );
+ }
+ }
+
+ sal_Int32 nIndex = pParent->indexOfChild(pBufferNode);
+
+ std::vector< std::unique_ptr<BufferNode> > vChildren = pBufferNode->releaseChildren();
+ pParent->removeChild(pBufferNode); // delete buffernode
+
+ for( auto& i : vChildren )
+ {
+ i->setParent(pParent);
+ pParent->addChild(std::move(i), nIndex);
+ nIndex++;
+ }
+
+ }
+}
+
+BufferNode* SAXEventKeeperImpl::findNextBlockingBufferNode(
+ BufferNode* pStartBufferNode)
+/****** SAXEventKeeperImpl/findNextBlockingBufferNode ************************
+ *
+ * NAME
+ * findNextBlockingBufferNode -- finds the next blocking BufferNode
+ * behind the particular BufferNode.
+ *
+ * SYNOPSIS
+ * pBufferNode = findNextBlockingBufferNode( pStartBufferNode );
+ *
+ * INPUTS
+ * pStartBufferNode - the BufferNode from where to search the next
+ * blocking BufferNode.
+ *
+ * RESULT
+ * pBufferNode - the next blocking BufferNode, or NULL if no such
+ * BufferNode exists.
+ ******************************************************************************/
+{
+ BufferNode* pNext = nullptr;
+
+ if (pStartBufferNode != nullptr)
+ {
+ pNext = pStartBufferNode;
+
+ while (nullptr != (pNext = const_cast<BufferNode*>(pNext->getNextNodeByTreeOrder())))
+ {
+ if (pNext->getBlocker() != nullptr)
+ {
+ break;
+ }
+ }
+ }
+
+ return pNext;
+}
+
+void SAXEventKeeperImpl::diffuse(BufferNode* pBufferNode)
+/****** SAXEventKeeperImpl/diffuse *******************************************
+ *
+ * NAME
+ * diffuse -- diffuse the notification.
+ *
+ * SYNOPSIS
+ * diffuse( pBufferNode );
+ *
+ * FUNCTION
+ * diffuse the collecting completion notification from the specific
+ * BufferNode along its parent link, until an ancestor which is not
+ * completely received is met.
+ *
+ * INPUTS
+ * pBufferNode - the BufferNode from which the notification will be
+ * diffused.
+ ******************************************************************************/
+{
+ BufferNode* pParent = pBufferNode;
+
+ while(pParent->isAllReceived())
+ {
+ pParent->elementCollectorNotify();
+ pParent = const_cast<BufferNode*>(pParent->getParent());
+ }
+}
+
+void SAXEventKeeperImpl::releaseElementMarkBuffer()
+/****** SAXEventKeeperImpl/releaseElementMarkBuffer **************************
+ *
+ * NAME
+ * releaseElementMarkBuffer -- releases useless ElementMarks
+ *
+ * SYNOPSIS
+ * releaseElementMarkBuffer( );
+ *
+ * FUNCTION
+ * releases each ElementMark in the releasing list
+ * m_vReleasedElementMarkBuffers.
+ * The operation differs between an ElementCollector and a Blocker.
+ ******************************************************************************/
+{
+ m_bIsReleasing = true;
+ while (!m_vReleasedElementMarkBuffers.empty())
+ {
+ auto pId = m_vReleasedElementMarkBuffers.begin();
+ sal_Int32 nId = *pId;
+ m_vReleasedElementMarkBuffers.erase( pId );
+
+ ElementMark* pElementMark = findElementMarkBuffer(nId);
+
+ if (pElementMark != nullptr)
+ {
+ if (css::xml::crypto::sax::ElementMarkType_ELEMENTCOLLECTOR
+ == pElementMark->getType())
+ /*
+ * it is a EC
+ */
+ {
+ ElementCollector* pElementCollector = static_cast<ElementCollector*>(pElementMark);
+
+ css::xml::crypto::sax::ElementMarkPriority nPriority = pElementCollector->getPriority();
+ /*
+ * Delete the EC from the buffer node.
+ */
+ BufferNode* pBufferNode = pElementCollector->getBufferNode();
+ pBufferNode->removeElementCollector(pElementCollector);
+
+ if ( nPriority == css::xml::crypto::sax::ElementMarkPriority_BEFOREMODIFY)
+ {
+ pBufferNode->notifyBranch();
+ }
+
+ /*
+ * delete the ElementMark
+ */
+ pElementCollector = nullptr;
+ pElementMark = nullptr;
+ removeElementMarkBuffer(nId);
+
+ /*
+ * delete the BufferNode
+ */
+ diffuse(pBufferNode);
+ smashBufferNode(pBufferNode, false);
+ }
+ else
+ /*
+ * it is a Blocker
+ */
+ {
+ /*
+ * Delete the TH from the buffer node.
+ */
+ BufferNode *pBufferNode = pElementMark->getBufferNode();
+ pBufferNode->setBlocker(nullptr);
+
+ /*
+ * If there is a following handler and no blocking now, then
+ * forward this event
+ */
+ if (m_pCurrentBlockingBufferNode == pBufferNode)
+ {
+ /*
+ * Before forwarding, the next blocking point needs to be
+ * found.
+ */
+ m_pCurrentBlockingBufferNode = findNextBlockingBufferNode(pBufferNode);
+
+ /*
+ * Forward the blocked events between these two STHs.
+ */
+ if (m_xNextHandler.is())
+ {
+ BufferNode* pTempCurrentBufferNode = m_pCurrentBufferNode;
+ BufferNode* pTempCurrentBlockingBufferNode = m_pCurrentBlockingBufferNode;
+
+ m_pCurrentBufferNode = pBufferNode;
+ m_pCurrentBlockingBufferNode = nullptr;
+
+ m_bIsForwarding = true;
+
+ m_xXMLDocument->generateSAXEvents(
+ m_xNextHandler,
+ this,
+ pBufferNode->getXMLElement(),
+ (pTempCurrentBlockingBufferNode == nullptr)?nullptr:(pTempCurrentBlockingBufferNode->getXMLElement()));
+
+ m_bIsForwarding = false;
+
+ m_pCurrentBufferNode = pTempCurrentBufferNode;
+ if (m_pCurrentBlockingBufferNode == nullptr)
+ {
+ m_pCurrentBlockingBufferNode = pTempCurrentBlockingBufferNode;
+ }
+ }
+
+ if (m_pCurrentBlockingBufferNode == nullptr &&
+ m_xSAXEventKeeperStatusChangeListener.is())
+ {
+ m_xSAXEventKeeperStatusChangeListener->blockingStatusChanged(false);
+ }
+ }
+
+ /*
+ * delete the ElementMark
+ */
+ pElementMark = nullptr;
+ removeElementMarkBuffer(nId);
+
+ /*
+ * delete the BufferNode
+ */
+ diffuse(pBufferNode);
+ smashBufferNode(pBufferNode, true);
+ }
+ }
+ }
+
+ m_bIsReleasing = false;
+
+ if (!m_pRootBufferNode->hasAnything() &&
+ !m_pRootBufferNode->hasChildren() &&
+ m_xSAXEventKeeperStatusChangeListener.is())
+ {
+ m_xSAXEventKeeperStatusChangeListener->bufferStatusChanged(true);
+ }
+}
+
+void SAXEventKeeperImpl::markElementMarkBuffer(sal_Int32 nId)
+/****** SAXEventKeeperImpl/markElementMarkBuffer *****************************
+ *
+ * NAME
+ * markElementMarkBuffer -- marks an ElementMark to be released
+ *
+ * SYNOPSIS
+ * markElementMarkBuffer( nId );
+ *
+ * FUNCTION
+ * puts the ElementMark with the particular Id into the releasing list,
+ * checks whether the releasing process is running, if not then launch
+ * this process.
+ *
+ * INPUTS
+ * nId - the Id of the ElementMark which will be released
+ ******************************************************************************/
+{
+ m_vReleasedElementMarkBuffers.push_back( nId );
+ if ( !m_bIsReleasing )
+ {
+ releaseElementMarkBuffer();
+ }
+}
+
+sal_Int32 SAXEventKeeperImpl::createElementCollector(
+ css::xml::crypto::sax::ElementMarkPriority nPriority,
+ bool bModifyElement,
+ const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener >& xReferenceResolvedListener)
+/****** SAXEventKeeperImpl/createElementCollector ****************************
+ *
+ * NAME
+ * createElementCollector -- creates a new ElementCollector on the
+ * incoming element.
+ *
+ * SYNOPSIS
+ * nId = createElementCollector( nSecurityId, nPriority,
+ * bModifyElement,
+ * xReferenceResolvedListener );
+ *
+ * FUNCTION
+ * allocs a new Id, then create an ElementCollector with this Id value.
+ * Add the new created ElementCollector to the new ElementCollecotor list.
+ *
+ * INPUTS
+ * nPriority - the priority of the new ElementCollector
+ * bModifyElement -whether this BufferNode will modify the content of
+ * the corresponding element it works on
+ * xReferenceResolvedListener - the listener for the new ElementCollector.
+ *
+ * RESULT
+ * nId - the Id of the new ElementCollector
+ ******************************************************************************/
+{
+ sal_Int32 nId = m_nNextElementMarkId;
+ m_nNextElementMarkId ++;
+
+ ElementCollector* pElementCollector
+ = new ElementCollector(
+ nId,
+ nPriority,
+ bModifyElement,
+ xReferenceResolvedListener);
+
+ m_vElementMarkBuffers.push_back(
+ std::unique_ptr<const ElementMark>(pElementCollector));
+
+ /*
+ * All the new EC to initial EC array.
+ */
+ m_vNewElementCollectors.push_back( pElementCollector );
+
+ return nId;
+}
+
+
+sal_Int32 SAXEventKeeperImpl::createBlocker()
+/****** SAXEventKeeperImpl/createBlocker *************************************
+ *
+ * NAME
+ * createBlocker -- creates a new Blocker on the incoming element.
+ *
+ * SYNOPSIS
+ * nId = createBlocker( nSecurityId );
+ *
+ * RESULT
+ * nId - the Id of the new Blocker
+ ******************************************************************************/
+{
+ sal_Int32 nId = m_nNextElementMarkId;
+ m_nNextElementMarkId ++;
+
+ OSL_ASSERT(m_pNewBlocker == nullptr);
+
+ m_pNewBlocker = new ElementMark(css::xml::crypto::sax::ConstOfSecurityId::UNDEFINEDSECURITYID, nId);
+ m_vElementMarkBuffers.push_back(
+ std::unique_ptr<const ElementMark>(m_pNewBlocker));
+
+ return nId;
+}
+
+/* XSAXEventKeeper */
+sal_Int32 SAL_CALL SAXEventKeeperImpl::addElementCollector( )
+{
+ return createElementCollector(
+ css::xml::crypto::sax::ElementMarkPriority_AFTERMODIFY,
+ false,
+ nullptr);
+}
+
+void SAL_CALL SAXEventKeeperImpl::removeElementCollector( sal_Int32 id )
+{
+ markElementMarkBuffer(id);
+}
+
+sal_Int32 SAL_CALL SAXEventKeeperImpl::addBlocker( )
+{
+ return createBlocker();
+}
+
+void SAL_CALL SAXEventKeeperImpl::removeBlocker( sal_Int32 id )
+{
+ markElementMarkBuffer(id);
+}
+
+sal_Bool SAL_CALL SAXEventKeeperImpl::isBlocking( )
+{
+ return (m_pCurrentBlockingBufferNode != nullptr);
+}
+
+css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > SAL_CALL
+ SAXEventKeeperImpl::getElement( sal_Int32 id )
+{
+ css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > rc;
+
+ ElementMark* pElementMark = findElementMarkBuffer(id);
+ if (pElementMark != nullptr)
+ {
+ rc = pElementMark->getBufferNode()->getXMLElement();
+ }
+
+ return rc;
+}
+
+void SAL_CALL SAXEventKeeperImpl::setElement(
+ sal_Int32 id,
+ const css::uno::Reference< css::xml::wrapper::XXMLElementWrapper >& aElement )
+{
+ if (aElement.is())
+ {
+ m_xXMLDocument->rebuildIDLink(aElement);
+
+ ElementMark* pElementMark = findElementMarkBuffer(id);
+
+ if (pElementMark != nullptr)
+ {
+ BufferNode* pBufferNode = pElementMark->getBufferNode();
+ if (pBufferNode != nullptr)
+ {
+ const bool bIsCurrent = m_xXMLDocument->isCurrent(pBufferNode->getXMLElement());
+ pBufferNode->setXMLElement(aElement);
+
+ if (bIsCurrent)
+ {
+ m_xXMLDocument->setCurrentElement(aElement);
+ }
+ }
+ }
+ }
+ else
+ {
+ removeElementCollector( id );
+ }
+}
+
+css::uno::Reference< css::xml::sax::XDocumentHandler > SAL_CALL SAXEventKeeperImpl::setNextHandler(
+ const css::uno::Reference< css::xml::sax::XDocumentHandler >& xNewHandler )
+{
+ css::uno::Reference< css::xml::sax::XDocumentHandler > xOldHandler = m_xNextHandler;
+
+ m_xNextHandler = xNewHandler;
+ return xOldHandler;
+}
+
+OUString SAL_CALL SAXEventKeeperImpl::printBufferNodeTree()
+{
+ OUString rc = "ElementMarkBuffers: size = "
+ + OUString::number(m_vElementMarkBuffers.size())
+ + "\nCurrentBufferNode: "
+ + m_xXMLDocument->getNodeName(m_pCurrentBufferNode->getXMLElement())
+ + "\n" + printBufferNode(m_pRootBufferNode.get(), 0);
+
+ return rc;
+}
+
+css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > SAL_CALL SAXEventKeeperImpl::getCurrentBlockingNode()
+{
+ css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > rc;
+
+ if (m_pCurrentBlockingBufferNode != nullptr)
+ {
+ rc = m_pCurrentBlockingBufferNode->getXMLElement();
+ }
+
+ return rc;
+}
+
+/* XSecuritySAXEventKeeper */
+sal_Int32 SAL_CALL SAXEventKeeperImpl::addSecurityElementCollector(
+ css::xml::crypto::sax::ElementMarkPriority priority,
+ sal_Bool modifyElement )
+{
+ return createElementCollector(
+ priority,
+ modifyElement,
+ nullptr);
+}
+
+void SAL_CALL SAXEventKeeperImpl::setSecurityId( sal_Int32 id, sal_Int32 securityId )
+{
+ ElementMark* pElementMark = findElementMarkBuffer(id);
+ if (pElementMark != nullptr)
+ {
+ pElementMark->setSecurityId(securityId);
+ }
+}
+
+
+/* XReferenceResolvedBroadcaster */
+void SAL_CALL SAXEventKeeperImpl::addReferenceResolvedListener(
+ sal_Int32 referenceId,
+ const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener >& listener )
+{
+ ElementCollector* pElementCollector = static_cast<ElementCollector*>(findElementMarkBuffer(referenceId));
+ if (pElementCollector != nullptr)
+ {
+ pElementCollector->setReferenceResolvedListener(listener);
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::removeReferenceResolvedListener(
+ sal_Int32 /*referenceId*/,
+ const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener >&)
+{
+}
+
+/* XSAXEventKeeperStatusChangeBroadcaster */
+void SAL_CALL SAXEventKeeperImpl::addSAXEventKeeperStatusChangeListener(
+ const css::uno::Reference< css::xml::crypto::sax::XSAXEventKeeperStatusChangeListener >& listener )
+{
+ m_xSAXEventKeeperStatusChangeListener = listener;
+}
+
+void SAL_CALL SAXEventKeeperImpl::removeSAXEventKeeperStatusChangeListener(
+ const css::uno::Reference< css::xml::crypto::sax::XSAXEventKeeperStatusChangeListener >&)
+{
+}
+
+/* XDocumentHandler */
+void SAL_CALL SAXEventKeeperImpl::startDocument( )
+{
+ if ( m_xNextHandler.is())
+ {
+ m_xNextHandler->startDocument();
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::endDocument( )
+{
+ if ( m_xNextHandler.is())
+ {
+ m_xNextHandler->endDocument();
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::startElement(
+ const OUString& aName,
+ const css::uno::Reference< css::xml::sax::XAttributeList >& xAttribs )
+{
+ /*
+ * If there is a following handler and no blocking now, then
+ * forward this event
+ */
+ if ((m_pCurrentBlockingBufferNode == nullptr) &&
+ (m_xNextHandler.is()) &&
+ (!m_bIsForwarding) &&
+ (m_pNewBlocker == nullptr))
+ {
+ m_xNextHandler->startElement(aName, xAttribs);
+ }
+ /*
+ * If not forwarding, buffer this startElement.
+ */
+ if (!m_bIsForwarding)
+ {
+ sal_Int32 nLength = xAttribs->getLength();
+ css::uno::Sequence< css::xml::csax::XMLAttribute > aAttributes (nLength);
+
+ for ( int i = 0; i<nLength; ++i )
+ {
+ aAttributes[i].sName = xAttribs->getNameByIndex(static_cast<short>(i));
+ aAttributes[i].sValue =xAttribs->getValueByIndex(static_cast<short>(i));
+ }
+
+ m_xCompressedDocumentHandler->compressedStartElement(aName, aAttributes);
+ }
+
+ BufferNode* pBufferNode = addNewElementMarkBuffers();
+ if (pBufferNode != nullptr)
+ {
+ setCurrentBufferNode(pBufferNode);
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::endElement( const OUString& aName )
+{
+ const bool bIsCurrent = m_xXMLDocument->isCurrent(m_pCurrentBufferNode->getXMLElement());
+
+ /*
+ * If there is a following handler and no blocking now, then
+ * forward this event
+ */
+ if ((m_pCurrentBlockingBufferNode == nullptr) &&
+ (m_xNextHandler.is()) &&
+ (!m_bIsForwarding))
+ {
+ m_xNextHandler->endElement(aName);
+ }
+
+ if ((m_pCurrentBlockingBufferNode != nullptr) ||
+ (m_pCurrentBufferNode != m_pRootBufferNode.get()) ||
+ (!m_xXMLDocument->isCurrentElementEmpty()))
+ {
+ if (!m_bIsForwarding)
+ {
+ m_xCompressedDocumentHandler->compressedEndElement(aName);
+ }
+
+ /*
+ * If the current buffer node has not notified yet, and
+ * the current buffer node is waiting for the current element,
+ * then let it notify.
+ */
+ if (bIsCurrent && (m_pCurrentBufferNode != m_pRootBufferNode.get()))
+ {
+ BufferNode* pOldCurrentBufferNode = m_pCurrentBufferNode;
+ m_pCurrentBufferNode = const_cast<BufferNode*>(m_pCurrentBufferNode->getParent());
+
+ pOldCurrentBufferNode->setReceivedAll();
+
+ if ((m_pCurrentBufferNode == m_pRootBufferNode.get()) &&
+ m_xSAXEventKeeperStatusChangeListener.is())
+ {
+ m_xSAXEventKeeperStatusChangeListener->collectionStatusChanged(false);
+ }
+ }
+ }
+ else
+ {
+ if (!m_bIsForwarding)
+ {
+ m_xXMLDocument->removeCurrentElement();
+ }
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::characters( const OUString& aChars )
+{
+ if (!m_bIsForwarding)
+ {
+ if ((m_pCurrentBlockingBufferNode == nullptr) && m_xNextHandler.is())
+ {
+ m_xNextHandler->characters(aChars);
+ }
+
+ if ((m_pCurrentBlockingBufferNode != nullptr) ||
+ (m_pCurrentBufferNode != m_pRootBufferNode.get()))
+ {
+ m_xCompressedDocumentHandler->compressedCharacters(aChars);
+ }
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::ignorableWhitespace( const OUString& aWhitespaces )
+{
+ characters( aWhitespaces );
+}
+
+void SAL_CALL SAXEventKeeperImpl::processingInstruction(
+ const OUString& aTarget, const OUString& aData )
+{
+ if (!m_bIsForwarding)
+ {
+ if ((m_pCurrentBlockingBufferNode == nullptr) && m_xNextHandler.is())
+ {
+ m_xNextHandler->processingInstruction(aTarget, aData);
+ }
+
+ if ((m_pCurrentBlockingBufferNode != nullptr) ||
+ (m_pCurrentBufferNode != m_pRootBufferNode.get()))
+ {
+ m_xCompressedDocumentHandler->compressedProcessingInstruction(aTarget, aData);
+ }
+ }
+}
+
+void SAL_CALL SAXEventKeeperImpl::setDocumentLocator( const css::uno::Reference< css::xml::sax::XLocator >&)
+{
+}
+
+/* XInitialization */
+void SAL_CALL SAXEventKeeperImpl::initialize( const css::uno::Sequence< css::uno::Any >& aArguments )
+{
+ OSL_ASSERT(aArguments.getLength() == 1);
+
+ aArguments[0] >>= m_xXMLDocument;
+ m_xDocumentHandler.set( m_xXMLDocument, css::uno::UNO_QUERY );
+ m_xCompressedDocumentHandler.set( m_xXMLDocument, css::uno::UNO_QUERY );
+
+ m_pRootBufferNode.reset( new BufferNode(m_xXMLDocument->getCurrentElement()) );
+ m_pCurrentBufferNode = m_pRootBufferNode.get();
+}
+
+OUString SAXEventKeeperImpl_getImplementationName ()
+{
+ return IMPLEMENTATION_NAME;
+}
+
+css::uno::Sequence< OUString > SAXEventKeeperImpl_getSupportedServiceNames( )
+{
+ css::uno::Sequence<OUString> aRet { "com.sun.star.xml.crypto.sax.SAXEventKeeper" };
+ return aRet;
+}
+
+/* XServiceInfo */
+OUString SAL_CALL SAXEventKeeperImpl::getImplementationName( )
+{
+ return SAXEventKeeperImpl_getImplementationName();
+}
+
+sal_Bool SAL_CALL SAXEventKeeperImpl::supportsService( const OUString& rServiceName )
+{
+ return cppu::supportsService(this, rServiceName);
+}
+
+css::uno::Sequence< OUString > SAL_CALL SAXEventKeeperImpl::getSupportedServiceNames( )
+{
+ return SAXEventKeeperImpl_getSupportedServiceNames();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */