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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 : #ifndef COMPHELPER_ACCESSIBLE_WRAPPER_HXX
21 : #define COMPHELPER_ACCESSIBLE_WRAPPER_HXX
22 :
23 : #include <comphelper/proxyaggregation.hxx>
24 : #include <com/sun/star/accessibility/XAccessible.hpp>
25 : #include <com/sun/star/accessibility/XAccessibleContext.hpp>
26 : #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
27 : #include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
28 : #include <cppuhelper/compbase3.hxx>
29 : #include <cppuhelper/compbase2.hxx>
30 : #include <com/sun/star/lang/XComponent.hpp>
31 : #include <cppuhelper/implbase2.hxx>
32 : #include <cppuhelper/implbase1.hxx>
33 : #include <comphelper/sequence.hxx>
34 : #include <comphelper/uno3.hxx>
35 : #include <cppuhelper/interfacecontainer.hxx>
36 : #include <comphelper/broadcasthelper.hxx>
37 : #include <comphelper/accessibleeventnotifier.hxx>
38 : #include <comphelper/stl_types.hxx>
39 : #include "comphelper/comphelperdllapi.h"
40 :
41 : //.............................................................................
42 : namespace comphelper
43 : {
44 : //.............................................................................
45 :
46 : //=========================================================================
47 : //= OAccessibleWrapper
48 : //=========================================================================
49 :
50 : class OAccessibleContextWrapper;
51 : class OWrappedAccessibleChildrenManager;
52 :
53 138 : struct OAccessibleWrapper_Base :
54 : public ::cppu::ImplHelper1 < ::com::sun::star::accessibility::XAccessible >
55 : {
56 : protected:
57 10 : ~OAccessibleWrapper_Base() {}
58 : };
59 :
60 : /** a class which aggregates a proxy for an XAccessible, and wrapping the context returned by this
61 : XAccessible.
62 : */
63 : class COMPHELPER_DLLPUBLIC OAccessibleWrapper:public OAccessibleWrapper_Base
64 : ,public OComponentProxyAggregation
65 :
66 : {
67 : private:
68 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
69 : m_xParentAccessible;
70 : ::com::sun::star::uno::WeakReference< ::com::sun::star::accessibility::XAccessibleContext >
71 : m_aContext;
72 :
73 : protected:
74 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
75 : m_xInnerAccessible;
76 :
77 : public:
78 : /** ctor
79 : @param _rxContext
80 : a service factory
81 :
82 : @param _rxInnerAccessible
83 : the object to wrap
84 :
85 : @param _rxParentAccessible
86 : The XAccessible which is our parent
87 : */
88 : OAccessibleWrapper(
89 : const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XComponentContext >& _rxContext,
90 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxInnerAccessible,
91 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxParentAccessible
92 : );
93 : DECLARE_XINTERFACE()
94 : DECLARE_XTYPEPROVIDER()
95 :
96 : // returns the context without creating it
97 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >
98 : getContextNoCreate( ) const;
99 :
100 : protected:
101 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext > SAL_CALL
102 : getAccessibleContext( ) throw (::com::sun::star::uno::RuntimeException);
103 :
104 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
105 5 : getParent() const { return m_xParentAccessible; }
106 :
107 : // own overridables
108 : virtual OAccessibleContextWrapper* createAccessibleContext(
109 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& _rxInnerContext
110 : );
111 :
112 : protected:
113 : ~OAccessibleWrapper( );
114 :
115 : private:
116 : COMPHELPER_DLLPRIVATE OAccessibleWrapper( ); // never implemented
117 : COMPHELPER_DLLPRIVATE OAccessibleWrapper( const OAccessibleWrapper& ); // never implemented
118 : COMPHELPER_DLLPRIVATE OAccessibleWrapper& operator=( const OAccessibleWrapper& ); // never implemented
119 : };
120 :
121 : //=========================================================================
122 : //= OAccessibleContextWrapperHelper
123 : //=========================================================================
124 :
125 : typedef ::cppu::ImplHelper1 < ::com::sun::star::accessibility::XAccessibleEventListener
126 : > OAccessibleContextWrapperHelper_Base;
127 :
128 : /** Helper for wrapping an XAccessibleContext by aggregating a proxy for it.
129 :
130 : <p>This class does not have own ref counting. In addition, it does not implement
131 : the XAccesibleContext interface, but provides all the methods from this interface
132 : which must be implemented using the inner context (such as getAccessibleChild*).</p>
133 :
134 : <p>Children of the aggregated XAccessibleContext are wrapped, too.</p>
135 :
136 : <p>AccessibleEvents fired by the inner context are multiplexed, especially, any references to
137 : children in such events are translated. This means that even in such events, no un-wrapped object
138 : will ever leave this class - if the aggregated context notifies an child event, the child passed
139 : to the event is wrapped</p>
140 :
141 : @seealso OAccessibleContextWrapper
142 : */
143 : class COMPHELPER_DLLPUBLIC OAccessibleContextWrapperHelper
144 : :private OComponentProxyAggregationHelper
145 : ,public OAccessibleContextWrapperHelper_Base
146 : {
147 : protected:
148 : /// the context we're wrapping (properly typed, in opposite to OComponentProxyAggregationHelper::m_xInner)
149 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >
150 : m_xInnerContext;
151 : /// the XAccessible which created this context
152 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
153 : m_xOwningAccessible;
154 : /// the XAccessible which is to be returned in getAccessibleParent
155 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
156 : m_xParentAccessible;
157 :
158 : OWrappedAccessibleChildrenManager* m_pChildMapper; // for mapping children from our inner context to our callers
159 :
160 : protected:
161 : /** ctor
162 :
163 : @param _rxContext
164 : a service factory
165 :
166 : @param _rxInnerAccessibleContext
167 : the object to wrap
168 :
169 : @param _rxOwningAccessible
170 : The XAccessible which created this object. This is necessary because children
171 : of our wrapped context meed to be wrapped, too, and if they're asked for a parent,
172 : they of course should return the proper parent<br/>
173 : The object will be held with a hard reference
174 :
175 : @param _rxParentAccessible
176 : The XAccessible to return in the getAccessibleParent call
177 : */
178 : OAccessibleContextWrapperHelper(
179 : const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XComponentContext >& _rxContext,
180 : ::cppu::OBroadcastHelper& _rBHelper,
181 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
182 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxOwningAccessible,
183 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxParentAccessible
184 : );
185 :
186 : /// to be called from within your ctor - does the aggregation of a proxy for m_xInnerContext
187 : void aggregateProxy(
188 : oslInterlockedCount& _rRefCount,
189 : ::cppu::OWeakObject& _rDelegator
190 : );
191 :
192 : protected:
193 : // XInterface
194 : ::com::sun::star::uno::Any SAL_CALL queryInterface( const ::com::sun::star::uno::Type& _rType ) throw (::com::sun::star::uno::RuntimeException);
195 :
196 : // XTypeProvider
197 : DECLARE_XTYPEPROVIDER( )
198 :
199 : // XAccessibleContext
200 : virtual sal_Int32 SAL_CALL getAccessibleChildCount( ) throw (::com::sun::star::uno::RuntimeException);
201 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int32 i ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
202 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet( ) throw (::com::sun::star::uno::RuntimeException);
203 :
204 : // XAccessibleEventListener
205 : virtual void SAL_CALL notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);
206 :
207 : // XEventListener
208 : virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw (::com::sun::star::uno::RuntimeException);
209 :
210 : // XComponent/OComponentProxyAggregationHelper
211 : virtual void SAL_CALL dispose() throw( ::com::sun::star::uno::RuntimeException );
212 :
213 : // own overridables
214 : /** notify an accessible event which has been translated (if necessary)
215 :
216 : <p>Usually, you derive your clas from both OAccessibleContextWrapperHelper and XAccessibleEventBroadcaster,
217 : and simply call all your XAccessibleEventListener with the given event.</p>
218 :
219 : <p>The mutex of the BroadcastHelper passed to the instance's ctor is <em>not</em> locked when calling
220 : into this method</p>
221 : */
222 : virtual void notifyTranslatedEvent( const ::com::sun::star::accessibility::AccessibleEventObject& _rEvent ) throw (::com::sun::star::uno::RuntimeException) = 0;
223 :
224 : protected:
225 : ~OAccessibleContextWrapperHelper( );
226 :
227 : OAccessibleContextWrapperHelper( ); // never implemented
228 : OAccessibleContextWrapperHelper( const OAccessibleContextWrapperHelper& ); // never implemented
229 : OAccessibleContextWrapperHelper& operator=( const OAccessibleContextWrapperHelper& ); // never implemented
230 : };
231 :
232 : //=========================================================================
233 : //= OAccessibleContextWrapper
234 : //=========================================================================
235 : typedef ::cppu::PartialWeakComponentImplHelper2< ::com::sun::star::accessibility::XAccessibleEventBroadcaster
236 : , ::com::sun::star::accessibility::XAccessibleContext
237 : > OAccessibleContextWrapper_CBase;
238 :
239 : class COMPHELPER_DLLPUBLIC OAccessibleContextWrapper
240 : :public OBaseMutex
241 : ,public OAccessibleContextWrapper_CBase
242 : ,public OAccessibleContextWrapperHelper
243 : {
244 : private:
245 : ::comphelper::AccessibleEventNotifier::TClientId m_nNotifierClient; // for notifying AccessibleEvents
246 :
247 : public:
248 : /** ctor
249 :
250 : @param _rxContext
251 : a service factory
252 :
253 : @param _rxInnerAccessibleContext
254 : the object to wrap
255 :
256 : @param _rxOwningAccessible
257 : The XAccessible which created this object. This is necessary because children
258 : of our wrapped context meed to be wrapped, too, and if they're asked for a parent,
259 : they of course should return the proper parent<br/>
260 : The object will be held with a hard reference
261 :
262 : @param _rxParentAccessible
263 : The XAccessible to return in the getAccessibleParent call
264 : */
265 : OAccessibleContextWrapper(
266 : const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XComponentContext >& _rxContext,
267 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
268 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxOwningAccessible,
269 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxParentAccessible
270 : );
271 :
272 : // XInterface
273 : DECLARE_XINTERFACE( )
274 : // XTypeProvider
275 : DECLARE_XTYPEPROVIDER( )
276 :
277 : // XAccessibleContext
278 : virtual sal_Int32 SAL_CALL getAccessibleChildCount( ) throw (::com::sun::star::uno::RuntimeException);
279 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int32 i ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
280 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > SAL_CALL getAccessibleParent( ) throw (::com::sun::star::uno::RuntimeException);
281 : virtual sal_Int32 SAL_CALL getAccessibleIndexInParent( ) throw (::com::sun::star::uno::RuntimeException);
282 : virtual sal_Int16 SAL_CALL getAccessibleRole( ) throw (::com::sun::star::uno::RuntimeException);
283 : virtual OUString SAL_CALL getAccessibleDescription( ) throw (::com::sun::star::uno::RuntimeException);
284 : virtual OUString SAL_CALL getAccessibleName( ) throw (::com::sun::star::uno::RuntimeException);
285 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet( ) throw (::com::sun::star::uno::RuntimeException);
286 : virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleStateSet > SAL_CALL getAccessibleStateSet( ) throw (::com::sun::star::uno::RuntimeException);
287 : virtual ::com::sun::star::lang::Locale SAL_CALL getLocale( ) throw (::com::sun::star::accessibility::IllegalAccessibleComponentStateException, ::com::sun::star::uno::RuntimeException);
288 :
289 : // XAccessibleEventBroadcaster
290 : virtual void SAL_CALL addAccessibleEventListener( const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleEventListener >& xListener ) throw (::com::sun::star::uno::RuntimeException);
291 : virtual void SAL_CALL removeAccessibleEventListener( const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleEventListener >& xListener ) throw (::com::sun::star::uno::RuntimeException);
292 :
293 : // OAccessibleContextWrapper
294 : virtual void notifyTranslatedEvent( const ::com::sun::star::accessibility::AccessibleEventObject& _rEvent ) throw (::com::sun::star::uno::RuntimeException);
295 :
296 : // XComponent
297 : virtual void SAL_CALL dispose() throw( ::com::sun::star::uno::RuntimeException );
298 0 : virtual void SAL_CALL addEventListener(const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XEventListener > & xListener)throw (::com::sun::star::uno::RuntimeException)
299 0 : { WeakComponentImplHelperBase::addEventListener(xListener); }
300 0 : virtual void SAL_CALL removeEventListener(const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XEventListener > & xListener)throw (::com::sun::star::uno::RuntimeException)
301 0 : { WeakComponentImplHelperBase::removeEventListener(xListener); }
302 :
303 : // OComponentHelper
304 : using OAccessibleContextWrapperHelper::disposing;
305 : virtual void SAL_CALL disposing() throw (::com::sun::star::uno::RuntimeException);
306 :
307 : protected:
308 : virtual ~OAccessibleContextWrapper();
309 :
310 : private:
311 : COMPHELPER_DLLPRIVATE OAccessibleContextWrapper(); // never implemented
312 : COMPHELPER_DLLPRIVATE OAccessibleContextWrapper( const OAccessibleContextWrapper& ); // never implemented
313 : COMPHELPER_DLLPRIVATE OAccessibleContextWrapper& operator=( const OAccessibleContextWrapper& ); // never implemented
314 : };
315 :
316 : //=========================================================================
317 : //= OWrappedAccessibleChildrenManager
318 : //=========================================================================
319 :
320 : typedef ::std::map < ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
321 : , ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
322 : , OInterfaceCompare< ::com::sun::star::accessibility::XAccessible >
323 : > AccessibleMap;
324 : // TODO: think about if we should hold these objects weak
325 :
326 : typedef ::cppu::WeakImplHelper1 < ::com::sun::star::lang::XEventListener
327 : > OWrappedAccessibleChildrenManager_Base;
328 : /** manages wrapping XAccessible's to XAccessible's
329 : */
330 : class COMPHELPER_DLLPUBLIC OWrappedAccessibleChildrenManager : public OWrappedAccessibleChildrenManager_Base
331 : {
332 : protected:
333 : ::com::sun::star::uno::Reference< ::com::sun::star::uno::XComponentContext >
334 : m_xContext;
335 : ::com::sun::star::uno::WeakReference< ::com::sun::star::accessibility::XAccessible >
336 : m_aOwningAccessible; // the XAccessible which belongs to the XAccessibleContext which we work for
337 : AccessibleMap m_aChildrenMap; // for caching children
338 : sal_Bool m_bTransientChildren; // are we prohibited to cache our children?
339 :
340 : public:
341 : /// ctor
342 : OWrappedAccessibleChildrenManager(
343 : const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XComponentContext >& _rxContext
344 : );
345 :
346 : /** specifies if the children are to be consideren transient (i.e.: not cached)
347 : <p>to be called only once per lifetime</p>
348 : */
349 : void setTransientChildren( sal_Bool _bSet = sal_True );
350 :
351 : /** sets the XAccessible which belongs to the XAccessibleContext which we work for
352 : <p>to be called only once per lifetime</p>
353 : */
354 : void setOwningAccessible( const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxAcc );
355 :
356 : /// retrieves a wrapper for the given accessible
357 : ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >
358 : getAccessibleWrapperFor(
359 : const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxKey,
360 : sal_Bool _bCreate = sal_True
361 : );
362 :
363 : /// erases the given key from the map (if it is present there)
364 : void removeFromCache( const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& _rxKey );
365 :
366 : /// invalidates (i.e. empties) the map
367 : void invalidateAll( );
368 :
369 : /** disposes (i.e. cleares) the manager
370 :
371 : <p>Note that the XAccessibleContext's of the mapped XAccessible objects are disposed, too.</p>
372 : */
373 : void dispose();
374 :
375 : /** handles a notification as got from the parent of the children we're managing
376 : <p>This applies only to the notifications which have a direct impact on our map.</p>
377 : */
378 : void handleChildNotification( const ::com::sun::star::accessibility::AccessibleEventObject& _rEvent );
379 :
380 : /** translates events as got from the parent of the children we're managing
381 : <p>This applies only to the notifications which deal with child objects which we manage.</p>
382 : */
383 : void translateAccessibleEvent(
384 : const ::com::sun::star::accessibility::AccessibleEventObject& _rEvent,
385 : ::com::sun::star::accessibility::AccessibleEventObject& _rTranslatedEvent
386 : );
387 :
388 : protected:
389 : // XEventListener
390 : virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw (::com::sun::star::uno::RuntimeException);
391 :
392 : protected:
393 : void implTranslateChildEventValue( const ::com::sun::star::uno::Any& _rInValue, ::com::sun::star::uno::Any& _rOutValue );
394 :
395 : protected:
396 : ~OWrappedAccessibleChildrenManager( );
397 :
398 : private:
399 : COMPHELPER_DLLPRIVATE OWrappedAccessibleChildrenManager( ); // never implemented
400 : COMPHELPER_DLLPRIVATE OWrappedAccessibleChildrenManager( const OWrappedAccessibleChildrenManager& ); // never implemented
401 : COMPHELPER_DLLPRIVATE OWrappedAccessibleChildrenManager& operator=( const OWrappedAccessibleChildrenManager& ); // never implemented
402 : };
403 :
404 : //.............................................................................
405 : } // namespace accessibility
406 : //.............................................................................
407 :
408 : #endif // COMPHELPER_ACCESSIBLE_WRAPPER_HXX
409 :
410 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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