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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 "elementlist.hxx"
+
+#include <string.h>
+#include <string_view>
+
+#include <cppuhelper/implbase.hxx>
+#include <o3tl/safeint.hxx>
+#include <tools/diagnose_ex.h>
+
+#include "element.hxx"
+#include "document.hxx"
+
+using namespace css::uno;
+using namespace css::xml::dom;
+using namespace css::xml::dom::events;
+
+namespace
+{
+ class WeakEventListener : public ::cppu::WeakImplHelper<css::xml::dom::events::XEventListener>
+ {
+ private:
+ css::uno::WeakReference<css::xml::dom::events::XEventListener> mxOwner;
+
+ public:
+ explicit WeakEventListener(const css::uno::Reference<css::xml::dom::events::XEventListener>& rOwner)
+ : mxOwner(rOwner)
+ {
+ }
+
+ virtual void SAL_CALL handleEvent(const css::uno::Reference<css::xml::dom::events::XEvent>& rEvent) override
+ {
+ css::uno::Reference<css::xml::dom::events::XEventListener> xOwner(mxOwner.get(),
+ css::uno::UNO_QUERY);
+ if (xOwner.is())
+ xOwner->handleEvent(rEvent);
+ }
+ };
+}
+
+namespace DOM
+{
+
+ static xmlChar* lcl_initXmlString(std::u16string_view rString)
+ {
+ OString const os =
+ OUStringToOString(rString, RTL_TEXTENCODING_UTF8);
+ xmlChar *const pRet = new xmlChar[os.getLength() + 1];
+ strcpy(reinterpret_cast<char*>(pRet), os.getStr());
+ return pRet;
+ }
+
+ CElementList::CElementList(::rtl::Reference<CElement> const& pElement,
+ ::osl::Mutex & rMutex,
+ std::u16string_view rName, OUString const*const pURI)
+ : m_xImpl(new CElementListImpl(pElement, rMutex, rName, pURI))
+ {
+ if (pElement.is()) {
+ m_xImpl->registerListener(*pElement);
+ }
+ }
+
+ CElementListImpl::CElementListImpl(::rtl::Reference<CElement> const& pElement,
+ ::osl::Mutex & rMutex,
+ std::u16string_view rName, OUString const*const pURI)
+ : m_pElement(pElement)
+ , m_rMutex(rMutex)
+ , m_pName(lcl_initXmlString(rName))
+ , m_pURI(pURI ? lcl_initXmlString(*pURI) : nullptr)
+ , m_bRebuild(true)
+ {
+ }
+
+ CElementListImpl::~CElementListImpl()
+ {
+ if (m_xEventListener.is() && m_pElement.is())
+ {
+ Reference< XEventTarget > xTarget = m_pElement;
+ assert(xTarget.is());
+ if (!xTarget.is())
+ return;
+ xTarget->removeEventListener("DOMSubtreeModified", m_xEventListener, false/*capture*/);
+ }
+ }
+
+ void CElementListImpl::registerListener(CElement & rElement)
+ {
+ try {
+ Reference< XEventTarget > const xTarget(
+ static_cast<XElement*>(& rElement), UNO_QUERY_THROW);
+ m_xEventListener = new WeakEventListener(this);
+ xTarget->addEventListener("DOMSubtreeModified", m_xEventListener, false/*capture*/);
+ } catch (const Exception &){
+ TOOLS_WARN_EXCEPTION( "unoxml", "Exception caught while registering NodeList as listener");
+ }
+ }
+
+ void CElementListImpl::buildlist(xmlNodePtr pNode, bool start)
+ {
+ // bail out if no rebuild is needed
+ if (start) {
+ if (!m_bRebuild)
+ {
+ return;
+ } else {
+ m_nodevector.clear();
+ m_bRebuild = false; // don't rebuild until tree is mutated
+ }
+ }
+
+ while (pNode != nullptr )
+ {
+ if (pNode->type == XML_ELEMENT_NODE &&
+ (strcmp(reinterpret_cast<char const *>(pNode->name), reinterpret_cast<char*>(m_pName.get())) == 0))
+ {
+ if (!m_pURI) {
+ m_nodevector.push_back(pNode);
+ } else {
+ if (pNode->ns != nullptr && (0 ==
+ strcmp(reinterpret_cast<char const *>(pNode->ns->href), reinterpret_cast<char*>(m_pURI.get()))))
+ {
+ m_nodevector.push_back(pNode);
+ }
+ }
+ }
+ if (pNode->children != nullptr) buildlist(pNode->children, false);
+
+ if (!start) pNode = pNode->next;
+ else break; // fold back
+ }
+ }
+
+ /**
+ The number of nodes in the list.
+ */
+ sal_Int32 SAL_CALL CElementListImpl::getLength()
+ {
+ ::osl::MutexGuard const g(m_rMutex);
+
+ if (!m_pElement.is()) { return 0; }
+
+ // this has to be 'live'
+ buildlist(m_pElement->GetNodePtr());
+ return m_nodevector.size();
+ }
+ /**
+ Returns the indexth item in the collection.
+ */
+ Reference< XNode > SAL_CALL CElementListImpl::item(sal_Int32 index)
+ {
+ if (index < 0) throw RuntimeException();
+
+ ::osl::MutexGuard const g(m_rMutex);
+
+ if (!m_pElement.is()) { return nullptr; }
+
+ buildlist(m_pElement->GetNodePtr());
+ if (m_nodevector.size() <= o3tl::make_unsigned(index)) {
+ throw RuntimeException();
+ }
+ return m_pElement->GetOwnerDocument().GetCNode(m_nodevector[index]);
+ }
+
+ // tree mutations can change the list
+ void SAL_CALL CElementListImpl::handleEvent(Reference< XEvent > const&)
+ {
+ ::osl::MutexGuard const g(m_rMutex);
+
+ m_bRebuild = true;
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */