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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 <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(OUString const& 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,
OUString const& 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,
OUString const& 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(static_cast<XElement*>(m_pElement.get()), UNO_QUERY);
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();
}
Reference< XNode > const xRet(
m_pElement->GetOwnerDocument().GetCNode(m_nodevector[index]).get());
return xRet;
}
// 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: */
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