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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 <com/sun/star/accessibility/XAccessibleSelection.hpp>
21 : #include <accselectionhelper.hxx>
22 :
23 : #include <acccontext.hxx>
24 : #include <accmap.hxx>
25 : #include <svx/AccessibleShape.hxx>
26 : #include <viewsh.hxx>
27 : #include <fesh.hxx>
28 : #include <vcl/svapp.hxx>
29 : #include <flyfrm.hxx>
30 :
31 : #include <com/sun/star/uno/Reference.hxx>
32 : #include <com/sun/star/accessibility/AccessibleStateType.hpp>
33 : #include <com/sun/star/accessibility/XAccessibleStateSet.hpp>
34 : #include <fmtanchr.hxx>
35 :
36 : using namespace ::com::sun::star::accessibility;
37 : using namespace ::com::sun::star;
38 : using namespace ::com::sun::star::uno;
39 :
40 : using ::com::sun::star::accessibility::XAccessible;
41 : using ::com::sun::star::accessibility::XAccessibleContext;
42 : using ::com::sun::star::accessibility::XAccessibleSelection;
43 :
44 : using namespace ::sw::access;
45 :
46 0 : SwAccessibleSelectionHelper::SwAccessibleSelectionHelper(
47 : SwAccessibleContext& rCtxt ) :
48 0 : rContext( rCtxt )
49 : {
50 0 : }
51 :
52 0 : SwAccessibleSelectionHelper::~SwAccessibleSelectionHelper()
53 : {
54 0 : }
55 :
56 0 : SwFEShell* SwAccessibleSelectionHelper::GetFEShell()
57 : {
58 : OSL_ENSURE( rContext.GetMap() != NULL, "no map?" );
59 0 : SwViewShell* pViewShell = rContext.GetMap()->GetShell();
60 : OSL_ENSURE( pViewShell != NULL,
61 : "No view shell? Then what are you looking at?" );
62 :
63 0 : SwFEShell* pFEShell = NULL;
64 0 : if( pViewShell->ISA( SwFEShell ) )
65 : {
66 0 : pFEShell = static_cast<SwFEShell*>( pViewShell );
67 : }
68 :
69 0 : return pFEShell;
70 : }
71 :
72 0 : void SwAccessibleSelectionHelper::throwIndexOutOfBoundsException()
73 : throw ( lang::IndexOutOfBoundsException )
74 : {
75 0 : Reference < XAccessibleContext > xThis( &rContext );
76 0 : Reference < XAccessibleSelection >xSelThis( xThis, UNO_QUERY );
77 : lang::IndexOutOfBoundsException aExcept(
78 : OUString( "index out of bounds" ),
79 0 : xSelThis ); \
80 0 : throw aExcept;
81 : }
82 :
83 : // XAccessibleSelection
84 0 : void SwAccessibleSelectionHelper::selectAccessibleChild(
85 : sal_Int32 nChildIndex )
86 : throw ( lang::IndexOutOfBoundsException,
87 : RuntimeException )
88 : {
89 0 : SolarMutexGuard aGuard;
90 :
91 : // Get the respective child as SwFrm (also do index checking), ...
92 0 : const SwAccessibleChild aChild = rContext.GetChild( *(rContext.GetMap()),
93 0 : nChildIndex );
94 0 : if( !aChild.IsValid() )
95 0 : throwIndexOutOfBoundsException();
96 :
97 : // we can only select fly frames, so we ignore (should: return
98 : // false) all other attempts at child selection
99 0 : SwFEShell* pFEShell = GetFEShell();
100 0 : if( pFEShell != NULL )
101 : {
102 0 : const SdrObject *pObj = aChild.GetDrawObject();
103 0 : if( pObj )
104 0 : rContext.Select( const_cast< SdrObject *>( pObj ), 0==aChild.GetSwFrm());
105 0 : }
106 : // no frame shell, or no frame, or no fly frame -> can't select
107 0 : }
108 :
109 : //When the selected state of the SwFrmOrObj is setted, return true.
110 0 : static sal_Bool lcl_getSelectedState(const SwAccessibleChild& aChild,
111 : SwAccessibleContext* pContext,
112 : SwAccessibleMap* pMap)
113 : {
114 0 : Reference< XAccessible > xAcc;
115 0 : if ( aChild.GetSwFrm() )
116 : {
117 0 : xAcc = pMap->GetContext( aChild.GetSwFrm(), sal_False );
118 : }
119 0 : else if ( aChild.GetDrawObject() )
120 : {
121 0 : xAcc = pMap->GetContext( aChild.GetDrawObject(), pContext, sal_False );
122 : }
123 :
124 0 : if( xAcc.is() )
125 : {
126 0 : Reference< XAccessibleContext > pRContext = xAcc->getAccessibleContext();
127 0 : if(!pRContext.is())
128 0 : return sal_False;
129 0 : Reference<XAccessibleStateSet> pRStateSet = pRContext->getAccessibleStateSet();
130 0 : if( pRStateSet.is() )
131 : {
132 0 : Sequence<short> pStates = pRStateSet->getStates();
133 0 : long count = pStates.getLength();
134 0 : for( int i = 0; i < count; i++ )
135 : {
136 0 : if( pStates[i] == AccessibleStateType::SELECTED)
137 0 : return sal_True;
138 0 : }
139 0 : }
140 : }
141 0 : return sal_False;
142 : }
143 :
144 0 : sal_Bool SwAccessibleSelectionHelper::isAccessibleChildSelected(
145 : sal_Int32 nChildIndex )
146 : throw ( lang::IndexOutOfBoundsException,
147 : RuntimeException )
148 : {
149 0 : SolarMutexGuard aGuard;
150 :
151 : // Get the respective child as SwFrm (also do index checking), ...
152 0 : const SwAccessibleChild aChild = rContext.GetChild( *(rContext.GetMap()),
153 0 : nChildIndex );
154 0 : if( !aChild.IsValid() )
155 0 : throwIndexOutOfBoundsException();
156 :
157 : // ... and compare to the currently selected frame
158 0 : sal_Bool bRet = sal_False;
159 0 : SwFEShell* pFEShell = GetFEShell();
160 0 : if( pFEShell )
161 : {
162 0 : if ( aChild.GetSwFrm() != 0 )
163 : {
164 0 : bRet = (pFEShell->GetCurrFlyFrm() == aChild.GetSwFrm());
165 : }
166 0 : else if ( aChild.GetDrawObject() )
167 : {
168 0 : bRet = pFEShell->IsObjSelected( *aChild.GetDrawObject() );
169 : }
170 : //If the SwFrmOrObj is not selected directly in the UI, we should check whether it is selected in the selection cursor.
171 0 : if( !bRet )
172 : {
173 0 : if( lcl_getSelectedState( aChild, &rContext, rContext.GetMap() ) == sal_True)
174 0 : bRet = sal_True;
175 : }
176 : }
177 :
178 0 : return bRet;
179 : }
180 :
181 0 : void SwAccessibleSelectionHelper::clearAccessibleSelection( )
182 : throw ( RuntimeException )
183 : {
184 : // return sal_False // we can't deselect
185 0 : }
186 :
187 0 : void SwAccessibleSelectionHelper::selectAllAccessibleChildren( )
188 : throw ( RuntimeException )
189 : {
190 0 : SolarMutexGuard aGuard;
191 :
192 : // We can select only one. So iterate over the children to find
193 : // the first we can select, and select it.
194 :
195 0 : SwFEShell* pFEShell = GetFEShell();
196 0 : if( pFEShell )
197 : {
198 0 : ::std::list< SwAccessibleChild > aChildren;
199 0 : rContext.GetChildren( *(rContext.GetMap()), aChildren );
200 :
201 0 : ::std::list< SwAccessibleChild >::const_iterator aIter = aChildren.begin();
202 0 : ::std::list< SwAccessibleChild >::const_iterator aEndIter = aChildren.end();
203 0 : while( aIter != aEndIter )
204 : {
205 0 : const SwAccessibleChild& rChild = *aIter;
206 0 : const SdrObject* pObj = rChild.GetDrawObject();
207 0 : const SwFrm* pFrm = rChild.GetSwFrm();
208 0 : if( pObj && !(pFrm != 0 && pFEShell->IsObjSelected()) )
209 : {
210 0 : rContext.Select( const_cast< SdrObject *>( pObj ), 0==pFrm );
211 0 : if( pFrm )
212 0 : break;
213 : }
214 0 : ++aIter;
215 0 : }
216 0 : }
217 0 : }
218 :
219 0 : sal_Int32 SwAccessibleSelectionHelper::getSelectedAccessibleChildCount( )
220 : throw ( RuntimeException )
221 : {
222 0 : SolarMutexGuard aGuard;
223 :
224 0 : sal_Int32 nCount = 0;
225 : // Only one frame can be selected at a time, and we only frames
226 : // for selectable children.
227 0 : SwFEShell* pFEShell = GetFEShell();
228 0 : if( pFEShell != 0 )
229 : {
230 0 : const SwFlyFrm* pFlyFrm = pFEShell->GetCurrFlyFrm();
231 0 : if( pFlyFrm )
232 : {
233 0 : nCount = 1;
234 : }
235 : else
236 : {
237 0 : sal_uInt16 nSelObjs = pFEShell->IsObjSelected();
238 0 : if( nSelObjs > 0 )
239 : {
240 0 : ::std::list< SwAccessibleChild > aChildren;
241 0 : rContext.GetChildren( *(rContext.GetMap()), aChildren );
242 :
243 : ::std::list< SwAccessibleChild >::const_iterator aIter =
244 0 : aChildren.begin();
245 : ::std::list< SwAccessibleChild >::const_iterator aEndIter =
246 0 : aChildren.end();
247 0 : while( aIter != aEndIter && nCount < nSelObjs )
248 : {
249 0 : const SwAccessibleChild& rChild = *aIter;
250 0 : if( rChild.GetDrawObject() && !rChild.GetSwFrm() &&
251 0 : rContext.GetParent(rChild, rContext.IsInPagePreview())
252 0 : == rContext.GetFrm() &&
253 0 : pFEShell->IsObjSelected( *rChild.GetDrawObject() ) )
254 : {
255 0 : nCount++;
256 : }
257 0 : ++aIter;
258 0 : }
259 : }
260 : }
261 : //If the SwFrmOrObj is not selected directly in the UI,
262 : //we should check whether it is selected in the selection cursor.
263 0 : if( nCount == 0 )
264 : {
265 0 : ::std::list< SwAccessibleChild > aChildren;
266 0 : rContext.GetChildren( *(rContext.GetMap()), aChildren );
267 : ::std::list< SwAccessibleChild >::const_iterator aIter =
268 0 : aChildren.begin();
269 : ::std::list< SwAccessibleChild >::const_iterator aEndIter =
270 0 : aChildren.end();
271 0 : while( aIter != aEndIter )
272 : {
273 0 : const SwAccessibleChild& aChild = *aIter;
274 0 : if( lcl_getSelectedState( aChild, &rContext, rContext.GetMap() ) )
275 0 : nCount++;
276 0 : ++aIter;
277 0 : }
278 : }
279 : }
280 0 : return nCount;
281 : }
282 :
283 0 : Reference<XAccessible> SwAccessibleSelectionHelper::getSelectedAccessibleChild(
284 : sal_Int32 nSelectedChildIndex )
285 : throw ( lang::IndexOutOfBoundsException,
286 : RuntimeException)
287 : {
288 0 : SolarMutexGuard aGuard;
289 :
290 : // Since the index is relative to the selected children, and since
291 : // there can be at most one selected frame child, the index must
292 : // be 0, and a selection must exist, otherwise we have to throw an
293 : // lang::IndexOutOfBoundsException
294 0 : SwFEShell* pFEShell = GetFEShell();
295 0 : if( 0 == pFEShell )
296 0 : throwIndexOutOfBoundsException();
297 :
298 0 : SwAccessibleChild aChild;
299 0 : const SwFlyFrm *pFlyFrm = pFEShell->GetCurrFlyFrm();
300 0 : if( pFlyFrm )
301 : {
302 0 : if( 0 == nSelectedChildIndex )
303 : {
304 0 : if(rContext.GetParent( SwAccessibleChild(pFlyFrm), rContext.IsInPagePreview()) == rContext.GetFrm() )
305 : {
306 0 : aChild = pFlyFrm;
307 : }
308 : else
309 : {
310 0 : const SwFrmFmt *pFrmFmt = pFlyFrm->GetFmt();
311 0 : if (pFrmFmt)
312 : {
313 0 : const SwFmtAnchor& pAnchor = pFrmFmt->GetAnchor();
314 0 : if( pAnchor.GetAnchorId() == FLY_AS_CHAR )
315 : {
316 0 : const SwFrm *pParaFrm = rContext.GetParent( SwAccessibleChild(pFlyFrm), rContext.IsInPagePreview() );
317 0 : aChild = pParaFrm;
318 : }
319 : }
320 : }
321 : }
322 : }
323 : else
324 : {
325 0 : sal_uInt16 nSelObjs = pFEShell->IsObjSelected();
326 0 : if( 0 == nSelObjs || nSelectedChildIndex >= nSelObjs )
327 0 : throwIndexOutOfBoundsException();
328 :
329 0 : ::std::list< SwAccessibleChild > aChildren;
330 0 : rContext.GetChildren( *(rContext.GetMap()), aChildren );
331 :
332 0 : ::std::list< SwAccessibleChild >::const_iterator aIter = aChildren.begin();
333 0 : ::std::list< SwAccessibleChild >::const_iterator aEndIter = aChildren.end();
334 0 : while( aIter != aEndIter && !aChild.IsValid() )
335 : {
336 0 : const SwAccessibleChild& rChild = *aIter;
337 0 : if( rChild.GetDrawObject() && !rChild.GetSwFrm() &&
338 0 : rContext.GetParent(rChild, rContext.IsInPagePreview()) ==
339 0 : rContext.GetFrm() &&
340 0 : pFEShell->IsObjSelected( *rChild.GetDrawObject() ) )
341 : {
342 0 : if( 0 == nSelectedChildIndex )
343 0 : aChild = rChild;
344 : else
345 0 : --nSelectedChildIndex;
346 : }
347 0 : ++aIter;
348 0 : }
349 : }
350 :
351 0 : if( !aChild.IsValid() )
352 0 : throwIndexOutOfBoundsException();
353 :
354 : OSL_ENSURE( rContext.GetMap() != NULL, "We need the map." );
355 0 : Reference< XAccessible > xChild;
356 0 : if( aChild.GetSwFrm() )
357 : {
358 : ::rtl::Reference < SwAccessibleContext > xChildImpl(
359 : rContext.GetMap()->GetContextImpl( aChild.GetSwFrm(),
360 0 : sal_True ) );
361 0 : if( xChildImpl.is() )
362 : {
363 0 : xChildImpl->SetParent( &rContext );
364 0 : xChild = xChildImpl.get();
365 0 : }
366 : }
367 0 : else if ( aChild.GetDrawObject() )
368 : {
369 : ::rtl::Reference < ::accessibility::AccessibleShape > xChildImpl(
370 : rContext.GetMap()->GetContextImpl( aChild.GetDrawObject(),
371 0 : &rContext, sal_True ) );
372 0 : if( xChildImpl.is() )
373 0 : xChild = xChildImpl.get();
374 : }
375 0 : return xChild;
376 : }
377 :
378 : // index has to be treated as global child index.
379 0 : void SwAccessibleSelectionHelper::deselectAccessibleChild(
380 : sal_Int32 nChildIndex )
381 : throw ( lang::IndexOutOfBoundsException,
382 : RuntimeException )
383 : {
384 0 : SolarMutexGuard g;
385 :
386 0 : if( nChildIndex < 0 ||
387 0 : nChildIndex >= rContext.GetChildCount( *(rContext.GetMap()) ) )
388 0 : throwIndexOutOfBoundsException();
389 0 : }
390 :
391 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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