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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 .
+ */
+
+#ifndef INCLUDED_XMLSECURITY_INC_FRAMEWORK_SAXEVENTKEEPERIMPL_HXX
+#define INCLUDED_XMLSECURITY_INC_FRAMEWORK_SAXEVENTKEEPERIMPL_HXX
+
+#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>
+
+class BufferNode;
+class ElementMark;
+class ElementCollector;
+
+#include <vector>
+#include <memory>
+
+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( );
+
+#endif
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */