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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 .
*/
#pragma once
#include <com/sun/star/xml/crypto/sax/XSecuritySAXEventKeeper.hpp>
#include <com/sun/star/xml/crypto/sax/XReferenceResolvedBroadcaster.hpp>
#include <com/sun/star/xml/crypto/sax/XSAXEventKeeperStatusChangeBroadcaster.hpp>
#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
#include <com/sun/star/lang/XInitialization.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <xmlsecuritydllapi.h>
#include <cppuhelper/implbase.hxx>
#include <vector>
#include <memory>
class BufferNode;
class ElementMark;
class ElementCollector;
namespace com::sun::star::xml::crypto::sax { class XSAXEventKeeperStatusChangeListener; }
namespace com::sun::star::xml::csax { class XCompressedDocumentHandler; }
namespace com::sun::star::xml::wrapper { class XXMLDocumentWrapper; }
class SAXEventKeeperImpl final : public cppu::WeakImplHelper
<
css::xml::crypto::sax::XSecuritySAXEventKeeper,
css::xml::crypto::sax::XReferenceResolvedBroadcaster,
css::xml::crypto::sax::XSAXEventKeeperStatusChangeBroadcaster,
css::xml::sax::XDocumentHandler,
css::lang::XInitialization,
css::lang::XServiceInfo
>
/****** SAXEventKeeperImpl.hxx/CLASS SAXEventKeeperImpl ***********************
*
* NAME
* SAXEventKeeperImpl -- SAX events buffer controller
*
* FUNCTION
* Controls SAX events to be buffered, and controls buffered SAX events
* to be released.
******************************************************************************/
{
private:
/*
* the XMLDocumentWrapper component which maintains all buffered SAX
* in DOM format.
*/
css::uno::Reference< css::xml::wrapper::XXMLDocumentWrapper >
m_xXMLDocument;
/*
* the document handler provided by the XMLDocumentWrapper component.
*/
css::uno::Reference< css::xml::sax::XDocumentHandler > m_xDocumentHandler;
/*
* the compressed document handler provided by the XMLDocumentWrapper
* component, the handler has more efficient method definition that the
* normal document handler.
*/
css::uno::Reference< css::xml::csax::XCompressedDocumentHandler >
m_xCompressedDocumentHandler;
/*
* a listener which receives this SAXEventKeeper's status change
* notification.
* Based on the status changes, the listener can decide whether the
* SAXEventKeeper should chain on/chain off the SAX chain, or whether
* the SAXEventKeeper is useless any long.
*/
css::uno::Reference< css::xml::crypto::sax::XSAXEventKeeperStatusChangeListener >
m_xSAXEventKeeperStatusChangeListener;
/*
* the root node of the BufferNode tree.
* the BufferNode tree is used to keep track of all buffered elements,
* it has the same structure with the document which maintains those
* elements physically.
*/
std::unique_ptr<BufferNode> m_pRootBufferNode;
/*
* the current active BufferNode.
* this is used to keep track the current location in the BufferNode tree,
* the next generated BufferNode will become a child BufferNode of it.
*/
BufferNode* m_pCurrentBufferNode;
/*
* the next Id for a coming ElementMark.
* the variable is increased by 1 when a new ElementMark is generated,
* in this way, we can promise the Id of any ElementMark is unique.
*/
sal_Int32 m_nNextElementMarkId;
/*
* maintains a collection of all ElementMarks.
*/
std::vector<std::unique_ptr<const ElementMark>> m_vElementMarkBuffers;
/*
* maintains a list of new ElementCollectors that will be created
* on the element represented by the next incoming startElement SAX
* event.
* The reason that such the m_vNewElementCollectors is necessary
* is: when an ElementCollector is asked to create, it can't be
* created completely at once, because the BufferNode it will be
* working on has not been created until the next startElement
* SAX event comes.
*/
std::vector< const ElementCollector* > m_vNewElementCollectors;
/*
* maintains the new Blocker that will be created
* on the element represented by the next incoming startElement SAX
* event.
*/
ElementMark* m_pNewBlocker;
/*
* the document handler to which all received SAX events will be
* forwarded.
*/
css::uno::Reference< css::xml::sax::XDocumentHandler > m_xNextHandler;
/*
* the current BufferNode which prevents the SAX events to be
* forwarded to the m_xNextHandler.
*/
BufferNode* m_pCurrentBlockingBufferNode;
/*
* maintains a list of ElementMark that has been asked to release.
* Because during processing a request of releasing an ElementMark,
* another releasing ElementMark request can be invoked. To avoid
* reentering the same method, a such request only add that ElementMark
* into this ElementMark list, then all ElementMarks will be processed in
* order.
*/
std::vector< sal_Int32 > m_vReleasedElementMarkBuffers;
/*
* a flag to indicate whether the ElementMark releasing process is running.
* When a releasing request comes, the assigned ElementMark is added to
* the m_vReleasedElementMarkBuffers first, then this flag is checked.
* If the ElementMark releasing process is not running, then call that
* method.
*/
bool m_bIsReleasing;
/*
* a flag to indicate whether it is the "Forwarding" mode now.
* A "Forwarding" mode means that all received SAX events are from the
* XMLDocumentWrapper component, instead of up-stream component in the
* SAX chain.
* The difference between "Forwarding" mode and normal mode is that:
* no SAX events need to be transferred to the XMLDocumentWrapper component
* again even if a buffer request happens.
*/
bool m_bIsForwarding;
void setCurrentBufferNode(BufferNode* pBufferNode);
BufferNode* addNewElementMarkBuffers();
ElementMark* findElementMarkBuffer(sal_Int32 nId) const;
void removeElementMarkBuffer(sal_Int32 nId);
OUString printBufferNode(
BufferNode const * pBufferNode, sal_Int32 nIndent) const;
static css::uno::Sequence< css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > >
collectChildWorkingElement(BufferNode const * pBufferNode);
void smashBufferNode(
BufferNode* pBufferNode, bool bClearRoot) const;
static BufferNode* findNextBlockingBufferNode(
BufferNode* pStartBufferNode);
static void diffuse(BufferNode* pBufferNode);
void releaseElementMarkBuffer();
void markElementMarkBuffer(sal_Int32 nId);
sal_Int32 createElementCollector(
css::xml::crypto::sax::ElementMarkPriority nPriority,
bool bModifyElement,
const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener>& xReferenceResolvedListener);
sal_Int32 createBlocker();
public:
SAXEventKeeperImpl();
virtual ~SAXEventKeeperImpl() override;
SAXEventKeeperImpl(const SAXEventKeeperImpl&) = delete;
SAXEventKeeperImpl& operator=(const SAXEventKeeperImpl&) = delete;
/* XSAXEventKeeper */
virtual sal_Int32 SAL_CALL addElementCollector( ) override;
virtual void SAL_CALL removeElementCollector( sal_Int32 id ) override;
virtual sal_Int32 SAL_CALL addBlocker( ) override;
virtual void SAL_CALL removeBlocker( sal_Int32 id ) override;
virtual sal_Bool SAL_CALL isBlocking( ) override;
virtual css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > SAL_CALL
getElement( sal_Int32 id ) override;
virtual void SAL_CALL setElement(
sal_Int32 id,
const css::uno::Reference< css::xml::wrapper::XXMLElementWrapper >& aElement ) override;
virtual css::uno::Reference<
css::xml::sax::XDocumentHandler > SAL_CALL
setNextHandler( const css::uno::Reference<
css::xml::sax::XDocumentHandler >& xNewHandler ) override;
virtual OUString SAL_CALL printBufferNodeTree() override;
virtual css::uno::Reference< css::xml::wrapper::XXMLElementWrapper > SAL_CALL
getCurrentBlockingNode() override;
/* XSecuritySAXEventKeeper */
virtual sal_Int32 SAL_CALL addSecurityElementCollector(
css::xml::crypto::sax::ElementMarkPriority priority,
sal_Bool modifyElement ) override;
virtual void SAL_CALL setSecurityId( sal_Int32 id, sal_Int32 securityId ) override;
/* XReferenceResolvedBroadcaster */
virtual void SAL_CALL addReferenceResolvedListener(
sal_Int32 referenceId,
const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener >& listener ) override;
virtual void SAL_CALL removeReferenceResolvedListener(
sal_Int32 referenceId,
const css::uno::Reference< css::xml::crypto::sax::XReferenceResolvedListener >& listener ) override;
/* XSAXEventKeeperStatusChangeBroadcaster */
virtual void SAL_CALL addSAXEventKeeperStatusChangeListener(
const css::uno::Reference< css::xml::crypto::sax::XSAXEventKeeperStatusChangeListener >& listener ) override;
virtual void SAL_CALL removeSAXEventKeeperStatusChangeListener(
const css::uno::Reference< css::xml::crypto::sax::XSAXEventKeeperStatusChangeListener >& listener ) override;
/* XDocumentHandler */
virtual void SAL_CALL startDocument( ) override;
virtual void SAL_CALL endDocument( ) override;
virtual void SAL_CALL startElement(
const OUString& aName,
const css::uno::Reference< css::xml::sax::XAttributeList >&
xAttribs ) override;
virtual void SAL_CALL endElement( const OUString& aName ) override;
virtual void SAL_CALL characters( const OUString& aChars ) override;
virtual void SAL_CALL ignorableWhitespace( const OUString& aWhitespaces ) override;
virtual void SAL_CALL processingInstruction(
const OUString& aTarget, const OUString& aData ) override;
virtual void SAL_CALL setDocumentLocator(
const css::uno::Reference< css::xml::sax::XLocator >& xLocator ) override;
/* XInitialization */
virtual void SAL_CALL initialize(
const css::uno::Sequence< css::uno::Any >& aArguments ) override;
/* XServiceInfo */
virtual OUString SAL_CALL getImplementationName( ) override;
virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames( ) override;
};
/// @throws css::uno::RuntimeException
OUString SAXEventKeeperImpl_getImplementationName();
/// @throws css::uno::RuntimeException
css::uno::Sequence< OUString > SAXEventKeeperImpl_getSupportedServiceNames( );
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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