Line data Source code
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 :
21 : //------------------------------------------------------------------------
22 : //
23 : // Global header
24 : //
25 : //------------------------------------------------------------------------
26 : #include <svl/itemset.hxx>
27 : #include <editeng/editdata.hxx>
28 : #include <editeng/outliner.hxx>
29 : #include <svx/svdmodel.hxx>
30 : #include <svx/svdobj.hxx>
31 : #include <svx/svdpool.hxx>
32 :
33 : //------------------------------------------------------------------------
34 : //
35 : // Project-local header
36 : //
37 : //------------------------------------------------------------------------
38 :
39 : #include "AccessibleEmptyEditSource.hxx"
40 : #include <svx/unoshtxt.hxx>
41 :
42 : namespace accessibility
43 : {
44 :
45 : /** This class simply wraps a SvxTextEditSource, forwarding all
46 : methods except the GetBroadcaster() call
47 : */
48 : class AccessibleProxyEditSource_Impl : public SvxEditSource
49 : {
50 : public:
51 : /** Construct AccessibleEmptyEditSource_Impl
52 :
53 : @param rBrdCast
54 :
55 : Proxy broadcaster to allow seamless flipping of edit source implementations. ProxyEditSource and EmptyEditSource
56 : */
57 : AccessibleProxyEditSource_Impl( SdrObject& rObj,
58 : SdrView& rView,
59 : const Window& rViewWindow );
60 : ~AccessibleProxyEditSource_Impl();
61 :
62 : // from the SvxEditSource interface
63 : SvxTextForwarder* GetTextForwarder();
64 : SvxViewForwarder* GetViewForwarder();
65 : SvxEditViewForwarder* GetEditViewForwarder( sal_Bool bCreate = sal_False );
66 :
67 : SvxEditSource* Clone() const;
68 :
69 : void UpdateData();
70 :
71 : SfxBroadcaster& GetBroadcaster() const;
72 :
73 : private:
74 : SvxTextEditSource maEditSource;
75 :
76 : };
77 :
78 : /** Dummy class, faking exactly one empty paragraph for EditEngine accessibility
79 : */
80 : class AccessibleEmptyEditSource_Impl : public SvxEditSource, public SvxViewForwarder, public SvxTextForwarder, public SfxBroadcaster
81 : {
82 : public:
83 :
84 0 : AccessibleEmptyEditSource_Impl() {}
85 0 : ~AccessibleEmptyEditSource_Impl() {}
86 :
87 : // from the SfxListener interface
88 : void Notify( SfxBroadcaster& rBC, const SfxHint& rHint );
89 :
90 : // SvxEditSource
91 0 : SvxTextForwarder* GetTextForwarder() { return this; }
92 0 : SvxViewForwarder* GetViewForwarder() { return this; }
93 0 : SvxEditSource* Clone() const { return NULL; }
94 0 : void UpdateData() {}
95 0 : SfxBroadcaster& GetBroadcaster() const { return *(const_cast<AccessibleEmptyEditSource_Impl*>(this)); }
96 :
97 : // SvxTextForwarder
98 0 : sal_uInt16 GetParagraphCount() const { return 1; }
99 0 : sal_uInt16 GetTextLen( sal_uInt16 /*nParagraph*/ ) const { return 0; }
100 0 : String GetText( const ESelection& /*rSel*/ ) const { return String(); }
101 0 : SfxItemSet GetAttribs( const ESelection& /*rSel*/, sal_Bool /*bOnlyHardAttrib*/ = 0 ) const
102 : {
103 : // AW: Very dangerous: The former implementation used a SfxItemPool created on the
104 : // fly which of course was deleted again ASAP. Thus, the returned SfxItemSet was using
105 : // a deleted Pool by design.
106 0 : return SfxItemSet(SdrObject::GetGlobalDrawObjectItemPool());
107 : }
108 0 : SfxItemSet GetParaAttribs( sal_uInt16 /*nPara*/ ) const { return GetAttribs(ESelection()); }
109 0 : void SetParaAttribs( sal_uInt16 /*nPara*/, const SfxItemSet& /*rSet*/ ) {}
110 0 : void RemoveAttribs( const ESelection& /*rSelection*/, sal_Bool /*bRemoveParaAttribs*/, sal_uInt16 /*nWhich*/ ){}
111 0 : void GetPortions( sal_uInt16 /*nPara*/, std::vector<sal_uInt16>& /*rList*/ ) const {}
112 :
113 0 : sal_uInt16 GetItemState( const ESelection& /*rSel*/, sal_uInt16 /*nWhich*/ ) const { return 0; }
114 0 : sal_uInt16 GetItemState( sal_uInt16 /*nPara*/, sal_uInt16 /*nWhich*/ ) const { return 0; }
115 :
116 0 : SfxItemPool* GetPool() const { return NULL; }
117 :
118 0 : void QuickInsertText( const String& /*rText*/, const ESelection& /*rSel*/ ) {}
119 0 : void QuickInsertField( const SvxFieldItem& /*rFld*/, const ESelection& /*rSel*/ ) {}
120 0 : void QuickSetAttribs( const SfxItemSet& /*rSet*/, const ESelection& /*rSel*/ ) {}
121 0 : void QuickInsertLineBreak( const ESelection& /*rSel*/ ) {}
122 :
123 0 : const SfxItemSet * GetEmptyItemSetPtr() { return 0; }
124 :
125 0 : void AppendParagraph() {}
126 0 : xub_StrLen AppendTextPortion( sal_uInt16 /*nPara*/, const String & /*rText*/, const SfxItemSet & /*rSet*/ ) { return 0; }
127 :
128 : //XTextCopy
129 0 : void CopyText(const SvxTextForwarder& ){}
130 :
131 0 : XubString CalcFieldValue( const SvxFieldItem& /*rField*/, sal_uInt16 /*nPara*/, sal_uInt16 /*nPos*/, Color*& /*rpTxtColor*/, Color*& /*rpFldColor*/ )
132 : {
133 0 : return XubString();
134 : }
135 0 : void FieldClicked( const SvxFieldItem&, sal_uInt16, xub_StrLen ) {;}
136 :
137 0 : sal_Bool IsValid() const { return sal_True; }
138 :
139 : void SetNotifyHdl( const Link& ) {}
140 0 : LanguageType GetLanguage( sal_uInt16, sal_uInt16 ) const { return LANGUAGE_DONTKNOW; }
141 0 : sal_uInt16 GetFieldCount( sal_uInt16 ) const { return 0; }
142 0 : EFieldInfo GetFieldInfo( sal_uInt16, sal_uInt16 ) const { return EFieldInfo(); }
143 0 : EBulletInfo GetBulletInfo( sal_uInt16 ) const { return EBulletInfo(); }
144 0 : Rectangle GetCharBounds( sal_uInt16, sal_uInt16 ) const { return Rectangle(); }
145 0 : Rectangle GetParaBounds( sal_uInt16 ) const { return Rectangle(); }
146 0 : MapMode GetMapMode() const { return MapMode(); }
147 0 : OutputDevice* GetRefDevice() const { return NULL; }
148 0 : sal_Bool GetIndexAtPoint( const Point&, sal_uInt16&, sal_uInt16& ) const { return sal_False; }
149 0 : sal_Bool GetWordIndices( sal_uInt16, sal_uInt16, sal_uInt16&, sal_uInt16& ) const { return sal_False; }
150 0 : sal_Bool GetAttributeRun( sal_uInt16&, sal_uInt16&, sal_uInt16, sal_uInt16 ) const { return sal_False; }
151 0 : sal_uInt16 GetLineCount( sal_uInt16 nPara ) const { return nPara == 0 ? 1 : 0; }
152 0 : sal_uInt16 GetLineLen( sal_uInt16, sal_uInt16 ) const { return 0; }
153 0 : void GetLineBoundaries( /*out*/sal_uInt16 & rStart, /*out*/sal_uInt16 & rEnd, sal_uInt16 /*nParagraph*/, sal_uInt16 /*nLine*/ ) const { rStart = rEnd = 0; }
154 0 : sal_uInt16 GetLineNumberAtIndex( sal_uInt16 /*nPara*/, sal_uInt16 /*nIndex*/ ) const { return 0; }
155 :
156 : // the following two methods would, strictly speaking, require
157 : // a switch to a real EditSource, too. Fortunately, the
158 : // AccessibleEditableTextPara implementation currently always
159 : // calls GetEditViewForwarder(true) before doing
160 : // changes. Thus, we rely on this behabviour here (problem
161 : // when that changes: via accessibility API, it would no
162 : // longer be possible to enter text in previously empty
163 : // shapes).
164 0 : sal_Bool Delete( const ESelection& ) { return sal_False; }
165 0 : sal_Bool InsertText( const String&, const ESelection& ) { return sal_False; }
166 0 : sal_Bool QuickFormatDoc( sal_Bool ) { return sal_True; }
167 0 : sal_Int16 GetDepth( sal_uInt16 ) const { return -1; }
168 0 : sal_Bool SetDepth( sal_uInt16, sal_Int16 ) { return sal_True; }
169 :
170 0 : Rectangle GetVisArea() const { return Rectangle(); }
171 0 : Point LogicToPixel( const Point& rPoint, const MapMode& /*rMapMode*/ ) const { return rPoint; }
172 0 : Point PixelToLogic( const Point& rPoint, const MapMode& /*rMapMode*/ ) const { return rPoint; }
173 :
174 : };
175 :
176 : // -------------------------------------------------------------------------
177 : // Implementing AccessibleProxyEditSource_Impl
178 : // -------------------------------------------------------------------------
179 :
180 0 : AccessibleProxyEditSource_Impl::AccessibleProxyEditSource_Impl( SdrObject& rObj,
181 : SdrView& rView,
182 : const Window& rViewWindow ) :
183 0 : maEditSource( rObj, 0, rView, rViewWindow )
184 : {
185 0 : }
186 :
187 0 : AccessibleProxyEditSource_Impl::~AccessibleProxyEditSource_Impl()
188 : {
189 0 : }
190 :
191 0 : SvxTextForwarder* AccessibleProxyEditSource_Impl::GetTextForwarder()
192 : {
193 0 : return maEditSource.GetTextForwarder();
194 : }
195 :
196 0 : SvxViewForwarder* AccessibleProxyEditSource_Impl::GetViewForwarder()
197 : {
198 0 : return maEditSource.GetViewForwarder();
199 : }
200 :
201 0 : SvxEditViewForwarder* AccessibleProxyEditSource_Impl::GetEditViewForwarder( sal_Bool bCreate )
202 : {
203 0 : return maEditSource.GetEditViewForwarder( bCreate );
204 : }
205 :
206 0 : SvxEditSource* AccessibleProxyEditSource_Impl::Clone() const
207 : {
208 0 : return maEditSource.Clone();
209 : }
210 :
211 0 : void AccessibleProxyEditSource_Impl::UpdateData()
212 : {
213 0 : maEditSource.UpdateData();
214 0 : }
215 :
216 0 : SfxBroadcaster& AccessibleProxyEditSource_Impl::GetBroadcaster() const
217 : {
218 0 : return maEditSource.GetBroadcaster();
219 : }
220 :
221 :
222 : // -------------------------------------------------------------------------
223 : // Implementing AccessibleEmptyEditSource
224 : // -------------------------------------------------------------------------
225 :
226 0 : AccessibleEmptyEditSource::AccessibleEmptyEditSource( SdrObject& rObj,
227 : SdrView& rView,
228 : const Window& rViewWindow ) :
229 0 : mpEditSource( new AccessibleEmptyEditSource_Impl() ),
230 : mrObj(rObj),
231 : mrView(rView),
232 : mrViewWindow(rViewWindow),
233 0 : mbEditSourceEmpty( true )
234 : {
235 0 : if( mrObj.GetModel() )
236 0 : StartListening( *mrObj.GetModel() );
237 0 : }
238 :
239 0 : AccessibleEmptyEditSource::~AccessibleEmptyEditSource()
240 : {
241 0 : if( !mbEditSourceEmpty )
242 : {
243 : // deregister as listener
244 0 : if( mpEditSource.get() )
245 0 : EndListening( mpEditSource->GetBroadcaster() );
246 : }
247 : else
248 : {
249 0 : if( mrObj.GetModel() )
250 0 : EndListening( *mrObj.GetModel() );
251 : }
252 0 : }
253 :
254 0 : SvxTextForwarder* AccessibleEmptyEditSource::GetTextForwarder()
255 : {
256 0 : if( !mpEditSource.get() )
257 0 : return NULL;
258 :
259 0 : return mpEditSource->GetTextForwarder();
260 : }
261 :
262 0 : SvxViewForwarder* AccessibleEmptyEditSource::GetViewForwarder()
263 : {
264 0 : if( !mpEditSource.get() )
265 0 : return NULL;
266 :
267 0 : return mpEditSource->GetViewForwarder();
268 : }
269 :
270 0 : void AccessibleEmptyEditSource::Switch2ProxyEditSource()
271 : {
272 : // deregister EmptyEditSource model listener
273 0 : if( mrObj.GetModel() )
274 0 : EndListening( *mrObj.GetModel() );
275 :
276 : SAL_WNODEPRECATED_DECLARATIONS_PUSH
277 0 : ::std::auto_ptr< SvxEditSource > pProxySource( new AccessibleProxyEditSource_Impl(mrObj, mrView, mrViewWindow) );
278 0 : ::std::auto_ptr< SvxEditSource > tmp = mpEditSource;
279 : SAL_WNODEPRECATED_DECLARATIONS_POP
280 0 : mpEditSource = pProxySource;
281 0 : pProxySource = tmp;
282 :
283 : // register as listener
284 0 : StartListening( mpEditSource->GetBroadcaster() );
285 :
286 : // we've irrevocably a full EditSource now.
287 0 : mbEditSourceEmpty = false;
288 0 : }
289 :
290 0 : SvxEditViewForwarder* AccessibleEmptyEditSource::GetEditViewForwarder( sal_Bool bCreate )
291 : {
292 0 : if( !mpEditSource.get() )
293 0 : return NULL;
294 :
295 : // switch edit source, if not yet done
296 0 : if( mbEditSourceEmpty && bCreate )
297 0 : Switch2ProxyEditSource();
298 :
299 0 : return mpEditSource->GetEditViewForwarder( bCreate );
300 : }
301 :
302 0 : SvxEditSource* AccessibleEmptyEditSource::Clone() const
303 : {
304 0 : if( !mpEditSource.get() )
305 0 : return NULL;
306 :
307 0 : return mpEditSource->Clone();
308 : }
309 :
310 0 : void AccessibleEmptyEditSource::UpdateData()
311 : {
312 0 : if( mpEditSource.get() )
313 0 : mpEditSource->UpdateData();
314 0 : }
315 :
316 0 : SfxBroadcaster& AccessibleEmptyEditSource::GetBroadcaster() const
317 : {
318 0 : return *(const_cast<AccessibleEmptyEditSource*>(this));
319 : }
320 :
321 0 : void AccessibleEmptyEditSource::Notify( SfxBroadcaster& /*rBC*/, const SfxHint& rHint )
322 : {
323 0 : const SdrHint* pSdrHint = PTR_CAST( SdrHint, &rHint );
324 :
325 0 : if( pSdrHint && pSdrHint->GetKind() == HINT_BEGEDIT &&
326 0 : &mrObj == pSdrHint->GetObject() && mpEditSource.get() )
327 : {
328 : // switch edit source, if not yet done. This is necessary
329 : // to become a full-fledged EditSource the first time a
330 : // user start entering text in a previously empty object.
331 0 : if( mbEditSourceEmpty )
332 0 : Switch2ProxyEditSource();
333 : }
334 0 : else if (pSdrHint && pSdrHint->GetObject()!=NULL)
335 : {
336 : // When the SdrObject just got a para outliner object then
337 : // switch the edit source.
338 0 : if (pSdrHint->GetObject()->GetOutlinerParaObject() != NULL)
339 0 : Switch2ProxyEditSource();
340 : }
341 :
342 : // forward messages
343 0 : Broadcast( rHint );
344 0 : }
345 :
346 : } // end of namespace accessibility
347 :
348 : //------------------------------------------------------------------------
349 :
350 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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