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Diffstat (limited to 'unoxml/source/dom/elementlist.cxx')
| -rw-r--r-- | unoxml/source/dom/elementlist.cxx | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/unoxml/source/dom/elementlist.cxx b/unoxml/source/dom/elementlist.cxx new file mode 100644 index 000000000..c8fc60437 --- /dev/null +++ b/unoxml/source/dom/elementlist.cxx @@ -0,0 +1,191 @@ +/* -*- 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: */ |