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| -rw-r--r-- | xmlsecurity/source/framework/saxeventkeeperimpl.cxx | 1157 |
1 files changed, 1157 insertions, 0 deletions
diff --git a/xmlsecurity/source/framework/saxeventkeeperimpl.cxx b/xmlsecurity/source/framework/saxeventkeeperimpl.cxx new file mode 100644 index 000000000..cde39d929 --- /dev/null +++ b/xmlsecurity/source/framework/saxeventkeeperimpl.cxx @@ -0,0 +1,1157 @@ +/* -*- 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: */ |