summaryrefslogtreecommitdiff
path: root/comphelper/inc/comphelper/servicedecl.hxx
blob: a7d51824f7c0cb13bea564699127311682c26af3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/
#if ! defined(COMPHELPER_SERVICEDECL_HXX_INCLUDED)
#define COMPHELPER_SERVICEDECL_HXX_INCLUDED

#include <comphelper/comphelperdllapi.h>
#include <cppuhelper/implbase1.hxx>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/registry/XRegistryKey.hpp>
#include <uno/environment.h>
#include <boost/utility.hpp>
#include <boost/function.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/repetition.hpp>
#include <boost/preprocessor/seq/enum.hpp>

namespace comphelper {
namespace service_decl {

class ServiceDecl;

namespace detail {
namespace css = ::com::sun::star;
typedef ::boost::function3<
    css::uno::Reference<css::uno::XInterface> /* return */,
    ServiceDecl const&,
    css::uno::Sequence<css::uno::Any> const&,
    css::uno::Reference<css::uno::XComponentContext> const&> CreateFuncF;
}

/** Class to declare a service implementation.  There is no need to implement
    lang::XServiceInfo nor lang::XInitialization anymore.
    The declaration can be done in various ways, the (simplest) form is

    <pre>
    class MyClass : public cppu::WeakImplHelper2<XInterface1, XInterface2> {
    public:
        MyClass( uno::Reference<uno::XComponentContext> const& xContext )
        [...]
    };
    [...]
    namespace sdecl = comphelper::service_decl;
    sdecl::ServiceDecl const myDecl(
        sdecl::class_<MyClass>(),
        "my.unique.implementation.name",
        "MyServiceSpec1;MyServiceSpec2" );
    </pre>

    If the service demands initialization by arguments, the implementation
    class has to define a constructor taking both arguments and component
    context:

    <pre>
    class MyClass : public cppu::WeakImplHelper2<XInterface1, XInterface2> {
    public:
        MyClass( uno::Sequence<uno::Any> const& args,
                 uno::Reference<uno:XComponentContext> const& xContext )
        [...]
    };
    [...]
    namespace sdecl = comphelper::service_decl;
    sdecl::ServiceDecl const myDecl(
        sdecl::class_<MyClass, sdecl::with_args<true> >(),
        "my.unique.implementation.name",
        "MyServiceSpec1;MyServiceSpec2" );
    </pre>

    Additionally, there is the possibility to process some code after creation,
    e.g. to add the newly created object as a listener or perform aggregation
    (C++-UNO only):

    <pre>
    uno::Reference<uno::XInterface> somePostProcCode( MyClass * p );
    [...]
    namespace sdecl = comphelper::service_decl;
    sdecl::ServiceDecl const myDecl(
        sdecl::class_<MyClass, ... >(&somePostProcCode),
        "my.unique.implementation.name",
        "MyServiceSpec1;MyServiceSpec2" );
    </pre>

    In the latter case, somePostProcCode gets the yet unacquired "raw" pointer.
*/
class COMPHELPER_DLLPUBLIC ServiceDecl : private ::boost::noncopyable
{
public:
    /** Ctor for multiple supported service names.

        @param implClass implementation class description
        @param pImplName implementation name
        @param pSupportedServiceNames supported service names
        @param cDelim delimiter for supported service names
    */
    template <typename ImplClassT>
    ServiceDecl( ImplClassT const& implClass,
                 char const* pImplName,
                 char const* pSupportedServiceNames, char cDelim = ';' )
        : m_createFunc(implClass.m_createFunc),
          m_pImplName(pImplName),
          m_pServiceNames(pSupportedServiceNames),
          m_cDelim(cDelim) {}

    /// @internal gets called by component_getFactoryHelper()
    void * getFactory( sal_Char const* pImplName ) const;

    /// @return supported service names
    ::com::sun::star::uno::Sequence< ::rtl::OUString>
    getSupportedServiceNames() const;

    /// @return whether name is in set of supported service names
    bool supportsService( ::rtl::OUString const& name ) const;

    /// @return implementation name
    ::rtl::OUString getImplementationName() const;

private:
    class Factory;
    friend class Factory;

    detail::CreateFuncF const m_createFunc;
    char const* const m_pImplName;
    char const* const m_pServiceNames;
    char const m_cDelim;
};

/** To specify whether the implementation class expects arguments
    (uno::Sequence<uno::Any>).
*/
template <bool> struct with_args;

/// @internal
namespace detail {
template <typename ImplT>
class OwnServiceImpl
    : public ImplT,
      private ::boost::noncopyable
{
    typedef ImplT BaseT;

public:
    OwnServiceImpl(
        ServiceDecl const& rServiceDecl,
        css::uno::Sequence<css::uno::Any> const& args,
        css::uno::Reference<css::uno::XComponentContext> const& xContext )
        :BaseT(args, xContext), m_rServiceDecl(rServiceDecl) {}
    OwnServiceImpl(
        ServiceDecl const& rServiceDecl,
        css::uno::Reference<css::uno::XComponentContext> const& xContext )
        : BaseT(xContext), m_rServiceDecl(rServiceDecl) {}

    // XServiceInfo
    virtual ::rtl::OUString SAL_CALL getImplementationName()
        throw (css::uno::RuntimeException) {
        return m_rServiceDecl.getImplementationName();
    }
    virtual sal_Bool SAL_CALL supportsService( ::rtl::OUString const& name )
        throw (css::uno::RuntimeException) {
        return m_rServiceDecl.supportsService(name);
    }
    virtual css::uno::Sequence< ::rtl::OUString>
    SAL_CALL getSupportedServiceNames() throw (css::uno::RuntimeException) {
        return m_rServiceDecl.getSupportedServiceNames();
    }

private:
    ServiceDecl const& m_rServiceDecl;
};

template <typename ImplT>
class ServiceImpl : public OwnServiceImpl< ::cppu::ImplInheritanceHelper1<ImplT,css::lang::XServiceInfo> >
{
typedef OwnServiceImpl< ::cppu::ImplInheritanceHelper1<ImplT,css::lang::XServiceInfo> > ServiceImpl_BASE;
public:
    ServiceImpl(
        ServiceDecl const& rServiceDecl,
        css::uno::Sequence<css::uno::Any> const& args,
        css::uno::Reference<css::uno::XComponentContext> const& xContext )
        : ServiceImpl_BASE(rServiceDecl, args, xContext) {}
    ServiceImpl(
        ServiceDecl const& rServiceDecl,
        css::uno::Reference<css::uno::XComponentContext> const& xContext )
        : ServiceImpl_BASE(rServiceDecl, xContext) {}
};

template <typename ServiceImplT>
struct PostProcessDefault {
    css::uno::Reference<css::uno::XInterface>
    operator()( ServiceImplT * p ) const {
        return static_cast<css::lang::XServiceInfo *>(p);
    }
};

template <typename ImplT, typename PostProcessFuncT, typename WithArgsT>
struct CreateFunc;

template <typename ImplT, typename PostProcessFuncT>
struct CreateFunc<ImplT, PostProcessFuncT, with_args<false> > {
    PostProcessFuncT const m_postProcessFunc;
    explicit CreateFunc( PostProcessFuncT const& postProcessFunc )
        : m_postProcessFunc(postProcessFunc) {}

    css::uno::Reference<css::uno::XInterface>
    operator()( ServiceDecl const& rServiceDecl,
                css::uno::Sequence<css::uno::Any> const&,
                css::uno::Reference<css::uno::XComponentContext>
                const& xContext ) const
    {
        return m_postProcessFunc(
            new ImplT( rServiceDecl, xContext ) );
    }
};

template <typename ImplT, typename PostProcessFuncT>
struct CreateFunc<ImplT, PostProcessFuncT, with_args<true> > {
    PostProcessFuncT const m_postProcessFunc;
    explicit CreateFunc( PostProcessFuncT const& postProcessFunc )
        : m_postProcessFunc(postProcessFunc) {}

    css::uno::Reference<css::uno::XInterface>
    operator()( ServiceDecl const& rServiceDecl,
                css::uno::Sequence<css::uno::Any> const& args,
                css::uno::Reference<css::uno::XComponentContext>
                const& xContext ) const
    {
        return m_postProcessFunc(
            new ImplT( rServiceDecl, args, xContext ) );
    }
};

} // namespace detail

/** Defines a service implementation class.

    @tpl ImplT_ service implementation class
    @WithArgsT whether the implementation class ctor expects arguments
               (uno::Sequence<uno::Any>, uno::Reference<uno::XComponentContext>)
               or just (uno::Reference<uno::XComponentContext>)
*/
template <typename ImplT_, typename WithArgsT = with_args<false> >
struct serviceimpl_base {
    typedef ImplT_ ImplT;

    detail::CreateFuncF const m_createFunc;

    typedef detail::PostProcessDefault<ImplT> PostProcessDefaultT;

    /** Default ctor.  Implementation class without args, expecting
        component context as single argument.
    */
    serviceimpl_base() : m_createFunc(
        detail::CreateFunc<ImplT, PostProcessDefaultT, WithArgsT>(
            PostProcessDefaultT() ) ) {}

    /** Ctor to pass a post processing function/functor.

        @tpl PostProcessDefaultT let your compiler deduce this
        @param postProcessFunc function/functor that gets the yet unacquired
                               ImplT_ pointer returning a
                               uno::Reference<uno::XInterface>
    */
    template <typename PostProcessFuncT>
    explicit serviceimpl_base( PostProcessFuncT const& postProcessFunc )
        : m_createFunc( detail::CreateFunc<ImplT, PostProcessFuncT, WithArgsT>(
                            postProcessFunc ) ) {}
};

template <typename ImplT_, typename WithArgsT = with_args<false> >
struct class_ : public serviceimpl_base< detail::ServiceImpl<ImplT_>, WithArgsT >
{
    typedef serviceimpl_base< detail::ServiceImpl<ImplT_>, WithArgsT > baseT;
    /** Default ctor.  Implementation class without args, expecting
        component context as single argument.
    */
    class_() : baseT() {}
    template <typename PostProcessFuncT>
    /** Ctor to pass a post processing function/functor.

        @tpl PostProcessDefaultT let your compiler deduce this
        @param postProcessFunc function/functor that gets the yet unacquired
                               ImplT_ pointer returning a
                               uno::Reference<uno::XInterface>
    */
    explicit class_( PostProcessFuncT const& postProcessFunc ) : baseT( postProcessFunc ) {}
};

//
// component_... helpers with arbitrary service declarations:
//

#define COMPHELPER_SERVICEDECL_getFactory(z_, n_, unused_) \
    if (pRet == 0) \
        pRet = BOOST_PP_CAT(s, n_).getFactory(pImplName);

/** The following preprocessor repetitions generate functions like

    <pre>
        inline void * component_getFactoryHelper(
            sal_Char const* pImplName,
            ::com::sun::star::lang::XMultiServiceFactory *,
            ::com::sun::star::registry::XRegistryKey * xRegistryKey,
            ServiceDecl const& s0, ServiceDecl const& s1, ... );
    </pre>

    which call on the passed service declarations.

    The maximum number of service declarations can be set by defining
    COMPHELPER_SERVICEDECL_COMPONENT_HELPER_MAX_ARGS; its default is 8.
*/
#define COMPHELPER_SERVICEDECL_make(z_, n_, unused_) \
inline void * component_getFactoryHelper( \
    sal_Char const* pImplName, \
    ::com::sun::star::lang::XMultiServiceFactory *, \
    ::com::sun::star::registry::XRegistryKey *, \
    BOOST_PP_ENUM_PARAMS(n_, ServiceDecl const& s) ) \
{ \
    void * pRet = 0; \
    BOOST_PP_REPEAT(n_, COMPHELPER_SERVICEDECL_getFactory, ~) \
    return pRet; \
}

#if ! defined(COMPHELPER_SERVICEDECL_COMPONENT_HELPER_MAX_ARGS)
#define COMPHELPER_SERVICEDECL_COMPONENT_HELPER_MAX_ARGS 8
#endif

BOOST_PP_REPEAT_FROM_TO(1, COMPHELPER_SERVICEDECL_COMPONENT_HELPER_MAX_ARGS,
                        COMPHELPER_SERVICEDECL_make, ~)

#undef COMPHELPER_SERVICEDECL_COMPONENT_HELPER_MAX_ARGS
#undef COMPHELPER_SERVICEDECL_make
#undef COMPHELPER_SERVICEDECL_getFactory

} // namespace service_decl
} // namespace comphelper

/** The following preprocessor macro generates the C access functions,
    that are used to initialize and register the components of a
    shared library object.

    If you have, say, written a lib that contains three distinct
    components, each with its own ServiceDecl object, you might want
    to employ the following code:

    <pre>
        // must reside outside _any_ namespace
        COMPHELPER_SERVICEDECL_EXPORTS3(yourServiceDecl1,
                                       yourServiceDecl2,
                                       yourServiceDecl3);
    </pre>

    For your convenience, the COMPHELPER_SERVICEDECL_EXPORTS<N> macro
    comes pre-defined up to N=8, if you should need more arguments,
    call COMPHELPER_SERVICEDECL_make_exports directly, like this:

    <pre>
        // must reside outside _any_ namespace
        COMPHELPER_SERVICEDECL_make_exports((yourServiceDecl1)(yourServiceDecl2)...(yourServiceDeclN));
    </pre>

    Note the missing colons between the bracketed arguments.
 */
#define COMPHELPER_SERVICEDECL_make_exports(varargs_ )  \
extern "C" \
{ \
    SAL_DLLPUBLIC_EXPORT void SAL_CALL component_getImplementationEnvironment( const sal_Char**  ppEnvTypeName, \
                                                          uno_Environment** /*ppEnv*/ ) \
    { \
        *ppEnvTypeName = CPPU_CURRENT_LANGUAGE_BINDING_NAME; \
    } \
 \
    SAL_DLLPUBLIC_EXPORT void* SAL_CALL component_getFactory( sal_Char const*                                pImplName, \
                                         ::com::sun::star::lang::XMultiServiceFactory*  pServiceManager, \
                                         ::com::sun::star::registry::XRegistryKey*      pRegistryKey ) \
    { \
        return component_getFactoryHelper( pImplName, pServiceManager, \
                                           pRegistryKey, \
                                           BOOST_PP_SEQ_ENUM(varargs_) ); \
    } \
}

#define COMPHELPER_SERVICEDECL_EXPORTS1(comp0_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_))
#define COMPHELPER_SERVICEDECL_EXPORTS2(comp0_,comp1_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_))
#define COMPHELPER_SERVICEDECL_EXPORTS3(comp0_,comp1_,comp2_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_))
#define COMPHELPER_SERVICEDECL_EXPORTS4(comp0_,comp1_,comp2_,comp3_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_)(comp3_))
#define COMPHELPER_SERVICEDECL_EXPORTS5(comp0_,comp1_,comp2_,comp3_,comp4_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_)(comp3_)(comp4_))
#define COMPHELPER_SERVICEDECL_EXPORTS6(comp0_,comp1_,comp2_,comp3_,comp4_,comp5_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_)(comp3_)(comp4_)(comp5_))
#define COMPHELPER_SERVICEDECL_EXPORTS7(comp0_,comp1_,comp2_,comp3_,comp4_,comp5_,comp6_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_)(comp3_)(comp4_)(comp5_)(comp6_))
#define COMPHELPER_SERVICEDECL_EXPORTS8(comp0_,comp1_,comp2_,comp3_,comp4_,comp5_,comp6_,comp7_) \
    COMPHELPER_SERVICEDECL_make_exports((comp0_)(comp1_)(comp2_)(comp3_)(comp4_)(comp5_)(comp6_)(comp7_))

#endif //  ! defined(COMPHELPER_SERVICEDECL_HXX_INCLUDED)