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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 :
10 : #ifndef INCLUDED_FILTER_SOURCE_XSLTFILTER_LIBXSLTTRANSFORMER_HXX
11 : #define INCLUDED_FILTER_SOURCE_XSLTFILTER_LIBXSLTTRANSFORMER_HXX
12 :
13 : #include <list>
14 : #include <map>
15 :
16 : #include <libxml/parser.h>
17 : #include <libxml/tree.h>
18 : #include <libxml/xmlIO.h>
19 : #include <libxslt/transform.h>
20 : #include <libxml/xpathInternals.h>
21 :
22 : #include <cppuhelper/factory.hxx>
23 : #include <cppuhelper/implbase1.hxx>
24 :
25 : #include <rtl/ref.hxx>
26 :
27 : #include <salhelper/thread.hxx>
28 :
29 : #include <com/sun/star/uno/Any.hxx>
30 :
31 : #include <com/sun/star/lang/XMultiServiceFactory.hpp>
32 : #include <com/sun/star/io/XInputStream.hpp>
33 : #include <com/sun/star/io/XOutputStream.hpp>
34 : #include <com/sun/star/io/XStreamListener.hpp>
35 : #include <com/sun/star/beans/NamedValue.hpp>
36 : #include <com/sun/star/xml/xslt/XXSLTTransformer.hpp>
37 :
38 : using namespace ::cppu;
39 : using namespace ::osl;
40 : using namespace ::com::sun::star::beans;
41 : using namespace ::com::sun::star::io;
42 : using namespace ::com::sun::star::uno;
43 :
44 : using ::std::list;
45 : using ::std::map;
46 :
47 : #define EXT_MODULE_OLE_URI "http://libreoffice.org/2011/xslt/ole"
48 :
49 : namespace XSLT
50 : {
51 :
52 : /*
53 : * LibXSLTTransformer provides an transforming pipe service to XSLTFilter.
54 : *
55 : * It implements XActiveDataSource, XActiveDataSink and XActiveDataControl
56 : * to consume data. It also notifies upstream of important events such as
57 : * begin and end of the transformation and of any errors that occur during
58 : * transformation.
59 : *
60 : * TODO: Error reporting leaves room for improvement, currently.
61 : *
62 : * The actual transformation is done by a worker thread.
63 : *
64 : * See Reader below.
65 : */
66 : class LibXSLTTransformer : public WeakImplHelper1<com::sun::star::xml::xslt::XXSLTTransformer>
67 : {
68 : private:
69 : static const char* const PARAM_SOURCE_URL;
70 : static const char* const PARAM_SOURCE_BASE_URL;
71 : static const char* const PARAM_TARGET_URL;
72 : static const char* const PARAM_TARGET_BASE_URL;
73 : static const char* const PARAM_DOCTYPE_PUBLIC;
74 :
75 : // the UNO ServiceFactory
76 : com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> m_xContext;
77 :
78 : com::sun::star::uno::Reference<XInputStream> m_rInputStream;
79 :
80 : com::sun::star::uno::Reference<XOutputStream> m_rOutputStream;
81 :
82 : typedef ::std::list<com::sun::star::uno::Reference<XStreamListener> > ListenerList;
83 :
84 : ListenerList m_listeners;
85 :
86 : OString m_styleSheetURL;
87 :
88 : ::std::map<const char *, OString> m_parameters;
89 :
90 : rtl::Reference< salhelper::Thread > m_Reader;
91 :
92 : protected:
93 6 : virtual ~LibXSLTTransformer() {
94 2 : if (m_Reader.is()) {
95 2 : m_Reader->terminate();
96 2 : m_Reader->join();
97 : }
98 4 : }
99 :
100 : public:
101 :
102 : // ctor...
103 : LibXSLTTransformer(const com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> &r);
104 :
105 : // XActiveDataSink
106 : virtual void SAL_CALL
107 : setInputStream(const com::sun::star::uno::Reference<XInputStream>& inputStream)
108 : throw (RuntimeException, std::exception) SAL_OVERRIDE;
109 : virtual com::sun::star::uno::Reference<XInputStream> SAL_CALL
110 : getInputStream() throw (RuntimeException, std::exception) SAL_OVERRIDE;
111 : // XActiveDataSource
112 : virtual void SAL_CALL
113 : setOutputStream(const com::sun::star::uno::Reference<XOutputStream>& outputStream)
114 : throw (RuntimeException, std::exception) SAL_OVERRIDE;
115 : virtual com::sun::star::uno::Reference<XOutputStream> SAL_CALL
116 : getOutputStream() throw (RuntimeException, std::exception) SAL_OVERRIDE;
117 : // XActiveDataControl
118 : virtual void SAL_CALL
119 : addListener(const com::sun::star::uno::Reference<XStreamListener>& listener)
120 : throw (RuntimeException, std::exception) SAL_OVERRIDE;
121 : virtual void SAL_CALL
122 : removeListener(const com::sun::star::uno::Reference<XStreamListener>& listener)
123 : throw (RuntimeException, std::exception) SAL_OVERRIDE;
124 : virtual void SAL_CALL
125 : start() throw (RuntimeException, std::exception) SAL_OVERRIDE;
126 : virtual void SAL_CALL
127 : terminate() throw (RuntimeException, std::exception) SAL_OVERRIDE;
128 : virtual void SAL_CALL
129 : initialize(const Sequence<Any>& params) throw (RuntimeException, std::exception) SAL_OVERRIDE;
130 :
131 : void SAL_CALL
132 : done();
133 :
134 : void SAL_CALL
135 : error(const OUString& msg);
136 :
137 : const OString SAL_CALL
138 4 : getStyleSheetURL() { return m_styleSheetURL; }
139 :
140 : ::std::map<const char*, OString> SAL_CALL
141 4 : getParameters() { return m_parameters; }
142 :
143 : com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> SAL_CALL
144 4 : getComponentContext() {
145 4 : return m_xContext;
146 : }
147 :
148 : };
149 :
150 : /*
151 : * Reader provides a worker thread to perform the actual transformation.
152 : * It pipes the streams provided by a LibXSLTTransformer
153 : * instance through libxslt.
154 : */
155 : class Reader : public salhelper::Thread
156 : {
157 : public:
158 : Reader(LibXSLTTransformer* transformer);
159 : int SAL_CALL
160 : read(char * buffer, int len);
161 : int SAL_CALL
162 : write(const char * buffer, int len);
163 : int SAL_CALL
164 : closeOutput();
165 :
166 : private:
167 : virtual
168 : ~Reader();
169 :
170 : static const sal_Int32 OUTPUT_BUFFER_SIZE;
171 : static const sal_Int32 INPUT_BUFFER_SIZE;
172 : LibXSLTTransformer* m_transformer;
173 : Sequence<sal_Int8> m_readBuf;
174 : Sequence<sal_Int8> m_writeBuf;
175 :
176 : virtual void execute() SAL_OVERRIDE;
177 : static void SAL_CALL registerExtensionModule();
178 : };
179 :
180 : }
181 : ;
182 :
183 : #endif // INCLUDED_FILTER_SOURCE_XSLTFILTER_LIBXSLTTRANSFORMER_HXX
184 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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