bd53efb791
Change-Id: I50e22d15e02bde4c0e97c89b42fe3399d7a1dfe5 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173412 Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk> Tested-by: Jenkins
193 lines
6.1 KiB
C++
193 lines
6.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "elementlist.hxx"
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#include <string.h>
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#include <string_view>
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#include <cppuhelper/implbase.hxx>
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#include <o3tl/safeint.hxx>
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#include <utility>
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#include <comphelper/diagnose_ex.hxx>
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#include <unotools/weakref.hxx>
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#include "element.hxx"
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#include "document.hxx"
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using namespace css::uno;
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using namespace css::xml::dom;
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using namespace css::xml::dom::events;
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namespace DOM { class CElementListImpl; }
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namespace DOM
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{
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class WeakEventListener : public ::cppu::WeakImplHelper<css::xml::dom::events::XEventListener>
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{
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private:
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unotools::WeakReference<DOM::CElementListImpl> mxOwner;
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public:
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explicit WeakEventListener(const rtl::Reference<DOM::CElementListImpl>& rOwner)
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: mxOwner(rOwner)
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{
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}
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virtual void SAL_CALL handleEvent(const css::uno::Reference<css::xml::dom::events::XEvent>& rEvent) override
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{
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rtl::Reference<DOM::CElementListImpl> xOwner(mxOwner);
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if (xOwner)
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xOwner->handleEvent(rEvent);
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}
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};
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}
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namespace DOM
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{
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static xmlChar* lcl_initXmlString(std::u16string_view rString)
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{
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OString const os =
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OUStringToOString(rString, RTL_TEXTENCODING_UTF8);
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xmlChar *const pRet = new xmlChar[os.getLength() + 1];
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strcpy(reinterpret_cast<char*>(pRet), os.getStr());
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return pRet;
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}
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CElementList::CElementList(::rtl::Reference<CElement> const& pElement,
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::osl::Mutex & rMutex,
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std::u16string_view rName, OUString const*const pURI)
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: m_xImpl(new CElementListImpl(pElement, rMutex, rName, pURI))
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{
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if (pElement.is()) {
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m_xImpl->registerListener(*pElement);
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}
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}
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CElementListImpl::CElementListImpl(::rtl::Reference<CElement> pElement,
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::osl::Mutex & rMutex,
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std::u16string_view rName, OUString const*const pURI)
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: m_pElement(std::move(pElement))
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, m_rMutex(rMutex)
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, m_pName(lcl_initXmlString(rName))
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, m_pURI(pURI ? lcl_initXmlString(*pURI) : nullptr)
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, m_bRebuild(true)
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{
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}
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CElementListImpl::~CElementListImpl()
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{
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if (m_xEventListener.is() && m_pElement.is())
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{
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Reference< XEventTarget > xTarget = m_pElement;
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assert(xTarget.is());
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if (!xTarget.is())
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return;
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xTarget->removeEventListener(u"DOMSubtreeModified"_ustr, m_xEventListener, false/*capture*/);
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}
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}
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void CElementListImpl::registerListener(CElement & rElement)
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{
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try {
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Reference< XEventTarget > const xTarget(
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static_cast<XElement*>(& rElement), UNO_QUERY_THROW);
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m_xEventListener = new WeakEventListener(this);
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xTarget->addEventListener(u"DOMSubtreeModified"_ustr, m_xEventListener, false/*capture*/);
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} catch (const Exception &){
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TOOLS_WARN_EXCEPTION( "unoxml", "Exception caught while registering NodeList as listener");
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}
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}
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void CElementListImpl::buildlist(xmlNodePtr pNode, bool start)
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{
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// bail out if no rebuild is needed
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if (start) {
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if (!m_bRebuild)
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{
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return;
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} else {
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m_nodevector.clear();
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m_bRebuild = false; // don't rebuild until tree is mutated
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}
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}
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while (pNode != nullptr )
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{
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if (pNode->type == XML_ELEMENT_NODE &&
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(strcmp(reinterpret_cast<char const *>(pNode->name), reinterpret_cast<char*>(m_pName.get())) == 0))
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{
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if (!m_pURI) {
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m_nodevector.push_back(pNode);
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} else {
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if (pNode->ns != nullptr && (0 ==
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strcmp(reinterpret_cast<char const *>(pNode->ns->href), reinterpret_cast<char*>(m_pURI.get()))))
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{
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m_nodevector.push_back(pNode);
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}
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}
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}
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if (pNode->children != nullptr) buildlist(pNode->children, false);
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if (!start) pNode = pNode->next;
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else break; // fold back
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}
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}
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/**
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The number of nodes in the list.
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*/
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sal_Int32 SAL_CALL CElementListImpl::getLength()
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{
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::osl::MutexGuard const g(m_rMutex);
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if (!m_pElement.is()) { return 0; }
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// this has to be 'live'
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buildlist(m_pElement->GetNodePtr());
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return m_nodevector.size();
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}
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/**
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Returns the indexth item in the collection.
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*/
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Reference< XNode > SAL_CALL CElementListImpl::item(sal_Int32 index)
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{
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if (index < 0) throw RuntimeException();
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::osl::MutexGuard const g(m_rMutex);
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if (!m_pElement.is()) { return nullptr; }
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buildlist(m_pElement->GetNodePtr());
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if (m_nodevector.size() <= o3tl::make_unsigned(index)) {
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throw RuntimeException();
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}
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return m_pElement->GetOwnerDocument().GetCNode(m_nodevector[index]);
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}
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// tree mutations can change the list
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void SAL_CALL CElementListImpl::handleEvent(Reference< XEvent > const&)
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{
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::osl::MutexGuard const g(m_rMutex);
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m_bRebuild = true;
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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