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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include "elementlist.hxx"
21 :
22 : #include <string.h>
23 :
24 : #include <element.hxx>
25 : #include <document.hxx>
26 :
27 :
28 : namespace DOM
29 : {
30 :
31 0 : static xmlChar* lcl_initXmlString(OUString const& rString)
32 : {
33 : OString const os =
34 0 : OUStringToOString(rString, RTL_TEXTENCODING_UTF8);
35 0 : xmlChar *const pRet = new xmlChar[os.getLength() + 1];
36 0 : strcpy(reinterpret_cast<char*>(pRet), os.getStr());
37 0 : return pRet;
38 : }
39 :
40 0 : CElementList::CElementList(::rtl::Reference<CElement> const& pElement,
41 : ::osl::Mutex & rMutex,
42 : OUString const& rName, OUString const*const pURI)
43 : : m_pElement(pElement)
44 : , m_rMutex(rMutex)
45 : , m_pName(lcl_initXmlString(rName))
46 : , m_pURI((pURI) ? lcl_initXmlString(*pURI) : 0)
47 0 : , m_bRebuild(true)
48 : {
49 0 : if (m_pElement.is()) {
50 0 : registerListener(*m_pElement);
51 : }
52 0 : }
53 :
54 0 : void CElementList::registerListener(CElement & rElement)
55 : {
56 : try {
57 : Reference< XEventTarget > const xTarget(
58 0 : static_cast<XElement*>(& rElement), UNO_QUERY_THROW);
59 0 : sal_Bool capture = sal_False;
60 0 : xTarget->addEventListener("DOMSubtreeModified",
61 0 : Reference< XEventListener >(this), capture);
62 0 : } catch (const Exception &e){
63 0 : OString aMsg("Exception caught while registering NodeList as listener:\n");
64 0 : aMsg += OUStringToOString(e.Message, RTL_TEXTENCODING_ASCII_US);
65 0 : OSL_FAIL(aMsg.getStr());
66 : }
67 0 : }
68 :
69 0 : void CElementList::buildlist(xmlNodePtr pNode, sal_Bool start)
70 : {
71 : // bail out if no rebuild is needed
72 0 : if (start) {
73 0 : if (!m_bRebuild)
74 : {
75 0 : return;
76 : } else {
77 0 : m_nodevector.erase(m_nodevector.begin(), m_nodevector.end());
78 0 : m_bRebuild = false; // don't rebuild until tree is mutated
79 : }
80 : }
81 :
82 0 : while (pNode != NULL )
83 : {
84 0 : if (pNode->type == XML_ELEMENT_NODE &&
85 0 : (strcmp((char*)pNode->name, (char*)m_pName.get()) == 0))
86 : {
87 0 : if (!m_pURI) {
88 0 : m_nodevector.push_back(pNode);
89 : } else {
90 0 : if (pNode->ns != NULL && (0 ==
91 0 : strcmp((char*)pNode->ns->href, (char*)m_pURI.get())))
92 : {
93 0 : m_nodevector.push_back(pNode);
94 : }
95 : }
96 : }
97 0 : if (pNode->children != NULL) buildlist(pNode->children, sal_False);
98 :
99 0 : if (!start) pNode = pNode->next;
100 0 : else break; // fold back
101 : }
102 : }
103 :
104 : /**
105 : The number of nodes in the list.
106 : */
107 0 : sal_Int32 SAL_CALL CElementList::getLength() throw (RuntimeException, std::exception)
108 : {
109 0 : ::osl::MutexGuard const g(m_rMutex);
110 :
111 0 : if (!m_pElement.is()) { return 0; }
112 :
113 : // this has to be 'live'
114 0 : buildlist(m_pElement->GetNodePtr());
115 0 : return m_nodevector.size();
116 : }
117 : /**
118 : Returns the indexth item in the collection.
119 : */
120 0 : Reference< XNode > SAL_CALL CElementList::item(sal_Int32 index)
121 : throw (RuntimeException, std::exception)
122 : {
123 0 : if (index < 0) throw RuntimeException();
124 :
125 0 : ::osl::MutexGuard const g(m_rMutex);
126 :
127 0 : if (!m_pElement.is()) { return 0; }
128 :
129 0 : buildlist(m_pElement->GetNodePtr());
130 0 : if (m_nodevector.size() <= static_cast<size_t>(index)) {
131 0 : throw RuntimeException();
132 : }
133 : Reference< XNode > const xRet(
134 0 : m_pElement->GetOwnerDocument().GetCNode(m_nodevector[index]).get());
135 0 : return xRet;
136 : }
137 :
138 : // tree mutations can change the list
139 0 : void SAL_CALL CElementList::handleEvent(Reference< XEvent > const&)
140 : throw (RuntimeException, std::exception)
141 : {
142 0 : ::osl::MutexGuard const g(m_rMutex);
143 :
144 0 : m_bRebuild = true;
145 0 : }
146 : }
147 :
148 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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