summaryrefslogtreecommitdiff
path: root/forms/source/richtext/richtextimplcontrol.cxx
blob: 7000be64360e7a4b1955e99b092efd470de5062d (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
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
/*************************************************************************
 *
 *  $RCSfile: richtextimplcontrol.cxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: rt $ $Date: 2004-05-07 16:13:04 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library 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 for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
 *  License at http://www.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/

#ifndef FORMS_SOURCE_RICHTEXT_RICHTEXTIMPLCONTOL_HXX
#include "richtextimplcontrol.hxx"
#endif
#ifndef FORMS_SOURCE_RICHTEXT_TEXTATTRIBUTELISTENER_HXX
#include "textattributelistener.hxx"
#endif
#ifndef FORMS_SOURCE_RICHTEXT_RICHTEXTENGINE_HXX
#include "richtextengine.hxx"
#endif

#ifndef _MyEDITENG_HXX
#include <svx/editeng.hxx>
#endif
#ifndef _MyEDITVIEW_HXX
#include <svx/editview.hxx>
#endif
#ifndef _EEITEM_HXX
#include <svx/eeitem.hxx>
#endif
#ifndef _EDITSTAT_HXX
#include <svx/editstat.hxx>
#endif
#ifndef _SVX_SVXIDS_HRC
#include <svx/svxids.hrc>
#endif
#ifndef _SVX_SCRIPTTYPEITEM_HXX
#include <svx/scripttypeitem.hxx>
#endif

#include <svx/editobj.hxx>

#ifndef _SFXITEMPOOL_HXX
#include <svtools/itempool.hxx>
#endif
#ifndef _SFXITEMSET_HXX
#include <svtools/itemset.hxx>
#endif

#ifndef _VCL_MAPUNIT_HXX
#include <vcl/mapunit.hxx>
#endif
#ifndef _SV_WINDOW_HXX
#include <vcl/window.hxx>
#endif
#ifndef _SV_SVAPP_HXX
#include <vcl/svapp.hxx>
#endif

#include <memory>

#define EMPTY_PAPER_SIZE    0x7FFFFFFF

//........................................................................
namespace frm
{
//........................................................................
    //====================================================================
    //= RichTextControlImpl
    //====================================================================
    //--------------------------------------------------------------------
    RichTextControlImpl::RichTextControlImpl( Control* _pAntiImpl, RichTextEngine* _pEngine, ITextAttributeListener* _pTextAttrListener, ITextSelectionListener* _pSelectionListener )
        :m_pAntiImpl            ( _pAntiImpl          )
        ,m_pEngine              ( _pEngine            )
        ,m_pTextAttrListener    ( _pTextAttrListener  )
        ,m_pSelectionListener   ( _pSelectionListener )
        ,m_pView                ( NULL                )
        ,m_pViewport            ( NULL                )
        ,m_pScrollCorner        ( NULL                )
        ,m_pHScroll             ( NULL                )
        ,m_pVScroll             ( NULL                )
        ,m_bHasEverBeenShown    ( false               )
    {
        OSL_ENSURE( m_pAntiImpl, "RichTextControlImpl::RichTextControlImpl: invalid window!" );
        OSL_ENSURE( m_pEngine,   "RichTextControlImpl::RichTextControlImpl: invalid edit engine! This will *definately* crash!" );

        m_pViewport = new RichTextViewPort( m_pAntiImpl );
        m_pViewport->setAttributeInvalidationHandler( LINK( this, RichTextControlImpl, OnInvalidateAllAttributes ) );
        m_pViewport->Show();

        // ensure that both the window and the reference device have the same map unit
        MapMode aRefDeviceMapMode( m_pEngine->GetRefDevice()->GetMapMode() );
        m_pAntiImpl->SetMapMode( aRefDeviceMapMode );
        m_pViewport->SetMapMode( aRefDeviceMapMode );

        m_pView = new EditView( m_pEngine, m_pViewport );
        m_pEngine->InsertView( m_pView );
        m_pViewport->setView( *m_pView );

        m_pEngine->registerEngineStatusListener( this );

        {
            ULONG nViewControlWord = m_pView->GetControlWord();
            nViewControlWord |= EV_CNTRL_AUTOSCROLL;
            m_pView->SetControlWord( nViewControlWord );
        }

        // ensure that it's initially scrolled to the upper left
        m_pView->SetVisArea( Rectangle( Point( ), m_pViewport->GetOutputSize() ) );

        ensureScrollbars();

        m_pAntiImpl->SetBackground( Wallpaper( m_pAntiImpl->GetSettings().GetStyleSettings().GetFieldColor() ) );
    }

    //--------------------------------------------------------------------
    RichTextControlImpl::~RichTextControlImpl( )
    {
        m_pEngine->RemoveView( m_pView );
        m_pEngine->revokeEngineStatusListener( this );
        delete m_pView;
        delete m_pViewport;
        delete m_pHScroll;
        delete m_pVScroll;
        delete m_pScrollCorner;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::implUpdateAttribute( AttributeHandlerPool::const_iterator _pHandler )
    {
        if  (  ( _pHandler->first == SID_ATTR_CHAR_WEIGHT )
            || ( _pHandler->first == SID_ATTR_CHAR_POSTURE )
            || ( _pHandler->first == SID_ATTR_CHAR_FONT )
            || ( _pHandler->first == SID_ATTR_CHAR_FONTHEIGHT )
            )
        {
            // these are attributes whose value depends on the current script type.
            // I.e., in real, there are *three* items in the ItemSet: One for each script
            // type (Latin, Asian, Complex). However, if we have an observer who is interested
            // in the state of this attribute, we have to kind of *merge* the three attributes
            // to only one.
            // This is usefull in case the observer is for instance a toolbox which contains only
            // an, e.g., "bold" slot, and thus not interested in the particular script type of the
            // current selection.
            SvxScriptSetItem aNormalizedSet( (WhichId)_pHandler->first, *m_pView->GetAttribs().GetPool() );
            normalizeScriptDependentAttribute( aNormalizedSet );

            implCheckUpdateCache( _pHandler->first, _pHandler->second->getState( aNormalizedSet.GetItemSet() ) );
        }
        else
            implCheckUpdateCache( _pHandler->first, _pHandler->second->getState( m_pView->GetAttribs() ) );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::updateAttribute( AttributeId _nAttribute )
    {
        AttributeHandlerPool::const_iterator pHandler = m_aAttributeHandlers.find( _nAttribute );
        if ( pHandler != m_aAttributeHandlers.end() )
            implUpdateAttribute( pHandler );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::updateAllAttributes( )
    {
        for (   AttributeHandlerPool::const_iterator pHandler = m_aAttributeHandlers.begin();
                pHandler != m_aAttributeHandlers.end();
                ++pHandler
            )
        {
            implUpdateAttribute( pHandler );
        }

        // notify changes of the selection, if necessary
        if ( m_pSelectionListener && m_pView )
        {
            ESelection aCurrentSelection = m_pView->GetSelection();
            if ( !aCurrentSelection.IsEqual( m_aLastKnownSelection ) )
            {
                m_aLastKnownSelection = aCurrentSelection;
                m_pSelectionListener->onSelectionChanged( m_aLastKnownSelection );
            }
        }
    }

    //--------------------------------------------------------------------
    AttributeState RichTextControlImpl::getAttributeState( AttributeId _nAttributeId ) const
    {
        StateCache::const_iterator aCachedStatePos = m_aLastKnownStates.find( _nAttributeId );
        if ( aCachedStatePos == m_aLastKnownStates.end() )
        {
            OSL_ENSURE( sal_False, "RichTextControlImpl::getAttributeState: Don't ask for the state of an attribute which I never encountered!" );
            return AttributeState( eIndetermined );
        }
        return aCachedStatePos->second;
    }

    //--------------------------------------------------------------------
    bool RichTextControlImpl::executeAttribute( const SfxItemSet& _rCurrentAttribs, SfxItemSet& _rAttribs, AttributeId _nAttribute, const SfxPoolItem* _pArgument, ScriptType _nForScriptType )
    {
        // let's see whether we have a handler for this attribute
        AttributeHandlerPool::const_iterator aHandlerPos = m_aAttributeHandlers.find( _nAttribute );
        if ( aHandlerPos != m_aAttributeHandlers.end() )
        {
            aHandlerPos->second->executeAttribute( _rCurrentAttribs, _rAttribs, _pArgument, _nForScriptType );
            return true;
        }
        return false;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::enableAttributeNotification( AttributeId _nAttributeId, ITextAttributeListener* _pListener )
    {
        AttributeHandlerPool::const_iterator aHandlerPos = m_aAttributeHandlers.find( _nAttributeId  );
        if ( aHandlerPos == m_aAttributeHandlers.end() )
        {
            ::rtl::Reference< IAttributeHandler > aHandler = AttributeHandlerFactory::getHandlerFor( _nAttributeId, *m_pEngine->GetEmptyItemSet().GetPool() );
            OSL_ENSURE( aHandler.is(), "RichTextControlImpl::enableAttributeNotification: no handler available for this attribute!" );
            if ( !aHandler.is() )
                return;
            OSL_POSTCOND( _nAttributeId == aHandler->getAttributeId(), "RichTextControlImpl::enableAttributeNotification: suspicious handler!" );

            aHandlerPos = m_aAttributeHandlers.insert( AttributeHandlerPool::value_type( _nAttributeId , aHandler ) ).first;
        }

        // remember the listener
        if ( _pListener )
            m_aAttributeListeners.insert( AttributeListenerPool::value_type( _nAttributeId, _pListener ) );

        // update (and broadcast) the state of this attribute
        updateAttribute( _nAttributeId );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::disableAttributeNotification( AttributeId _nAttributeId )
    {
        // forget the handler for this attribute
        AttributeHandlerPool::iterator aHandlerPos = m_aAttributeHandlers.find( _nAttributeId );
        if ( aHandlerPos != m_aAttributeHandlers.end() )
            m_aAttributeHandlers.erase( aHandlerPos );

        // as well as the listener
        AttributeListenerPool::iterator aListenerPos = m_aAttributeListeners.find( _nAttributeId );
        if ( aListenerPos != m_aAttributeListeners.end() )
            m_aAttributeListeners.erase( aListenerPos );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::normalizeScriptDependentAttribute( SvxScriptSetItem& _rScriptSetItem )
    {
        _rScriptSetItem.GetItemSet().Put( m_pView->GetAttribs(), FALSE );
        const SfxPoolItem* pNormalizedItem = _rScriptSetItem.GetItemOfScript( getSelectedScriptType() );

        WhichId nNormalizedWhichId = _rScriptSetItem.GetItemSet().GetPool()->GetWhich( _rScriptSetItem.Which() );
        if ( pNormalizedItem )
        {
            SfxPoolItem* pProperWhich = pNormalizedItem->Clone();
            pProperWhich->SetWhich( nNormalizedWhichId );
            _rScriptSetItem.GetItemSet().Put( *pProperWhich );
            DELETEZ( pProperWhich );
        }
        else
            _rScriptSetItem.GetItemSet().InvalidateItem( nNormalizedWhichId );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::implCheckUpdateCache( AttributeId _nAttribute, const AttributeState& _rState )
    {
        StateCache::iterator aCachePos = m_aLastKnownStates.find( _nAttribute );
        if ( aCachePos == m_aLastKnownStates.end() )
        {   // nothing known about this attribute, yet
            m_aLastKnownStates.insert( StateCache::value_type( _nAttribute, _rState ) );
        }
        else
        {
            if ( aCachePos->second == _rState )
            {
                // nothing to do
                return;
            }
            aCachePos->second = _rState;
        }

        // is there a dedicated listener for this particular attribute?
        AttributeListenerPool::const_iterator aListenerPos = m_aAttributeListeners.find( _nAttribute );
        if ( aListenerPos != m_aAttributeListeners.end( ) )
            aListenerPos->second->onAttributeStateChanged( _nAttribute, _rState );

        // call our global listener, if there is one
        if ( m_pTextAttrListener )
            m_pTextAttrListener->onAttributeStateChanged( _nAttribute, _rState );
    }

    //--------------------------------------------------------------------
    ScriptType RichTextControlImpl::getSelectedScriptType() const
    {
        ScriptType nScript = m_pView->GetSelectedScriptType();
        if ( !nScript )
            nScript = SvtLanguageOptions::GetScriptTypeOfLanguage( Application::GetSettings().GetLanguage() );
        return nScript;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::EditEngineStatusChanged( const EditStatus& _rStatus )
    {
        ULONG nStatusWord( _rStatus.GetStatusWord() );
        if  (   ( nStatusWord & EE_STAT_TEXTWIDTHCHANGED )
            ||  ( nStatusWord & EE_STAT_TEXTHEIGHTCHANGED )
            )
        {
            if ( ( nStatusWord & EE_STAT_TEXTHEIGHTCHANGED ) && windowHasAutomaticLineBreak() )
                m_pEngine->SetPaperSize( Size( m_pEngine->GetPaperSize().Width(), m_pEngine->GetTextHeight() ) );

            updateScrollbars();
        }

        bool bHScroll = 0 != ( nStatusWord & EE_STAT_HSCROLL );
        bool bVScroll = 0 != ( nStatusWord & EE_STAT_VSCROLL );

        // In case of *no* automatic line breaks, we also need to check for the *range* here.
        // Normally, we would do this only after a EE_STAT_TEXTWIDTHCHANGED. However, due to a bug
        // in the EditEngine (I believe so) this is not fired when the engine does not have
        // the AutoPaperSize bits set.
        // So in order to be properly notified, we would need the AutoPaperSize. But, with
        // AutoPaperSize, other things do not work anymore: Either, when we set a MaxAutoPaperSize,
        // then the view does automatic soft line breaks at the paper end - which we definately do
        // want. Or, if we did not set a MaxAutoPaperSize, then the view does not automatically scroll
        // anymore in horizontal direction.
        // So this is some kind of lose-lose situation ... :(
        if ( !windowHasAutomaticLineBreak() && bHScroll )
        {
            updateScrollbars();
            return;
        }

        if ( bHScroll && m_pHScroll )
            m_pHScroll->SetThumbPos( m_pView->GetVisArea().Left() );
        if ( bVScroll && m_pVScroll )
            m_pVScroll->SetThumbPos( m_pView->GetVisArea().Top() );
    }

    //--------------------------------------------------------------------
    IMPL_LINK( RichTextControlImpl, OnInvalidateAllAttributes, void*, _pNotInterestedIn )
    {
        updateAllAttributes();
        return 0L;
    }

    //--------------------------------------------------------------------
    IMPL_LINK( RichTextControlImpl, OnHScroll, ScrollBar*, _pScrollbar )
    {
        m_pView->Scroll( -_pScrollbar->GetDelta(), 0, RGCHK_PAPERSZ1 );
        return 0L;
    }

    //--------------------------------------------------------------------
    IMPL_LINK( RichTextControlImpl, OnVScroll, ScrollBar*, _pScrollbar )
    {
        m_pView->Scroll( 0, -_pScrollbar->GetDelta(), RGCHK_PAPERSZ1 );
        return 0L;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::ensureScrollbars()
    {
        bool bNeedVScroll = 0 != ( m_pAntiImpl->GetStyle() & WB_VSCROLL );
        bool bNeedHScroll = 0 != ( m_pAntiImpl->GetStyle() & WB_HSCROLL );

        if ( ( bNeedVScroll == hasVScrollBar() ) && ( bNeedHScroll == hasHScrollBar( ) ) )
            // nothing to do
            return;

        // create or delete the scrollbars, as necessary
        if ( !bNeedVScroll )
        {
            delete m_pVScroll;
            m_pVScroll = NULL;
        }
        else
        {
            m_pVScroll = new ScrollBar( m_pAntiImpl, WB_VSCROLL | WB_DRAG | WB_REPEAT );
            m_pVScroll->SetScrollHdl ( LINK( this, RichTextControlImpl, OnVScroll ) );
            m_pVScroll->Show();
        }

        if ( !bNeedHScroll )
        {
            delete m_pHScroll;
            m_pHScroll = NULL;
        }
        else
        {
            m_pHScroll = new ScrollBar( m_pAntiImpl, WB_HSCROLL | WB_DRAG | WB_REPEAT );
            m_pHScroll->SetScrollHdl ( LINK( this, RichTextControlImpl, OnHScroll ) );
            m_pHScroll->Show();
        }

        if ( m_pHScroll && m_pVScroll )
        {
            delete m_pScrollCorner;
            m_pScrollCorner = new ScrollBarBox( m_pAntiImpl );
            m_pScrollCorner->Show();
        }
        else
        {
            delete m_pScrollCorner;
            m_pScrollCorner = NULL;
        }

        layoutWindow();
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::ensureLineBreakSetting()
    {
        if ( !windowHasAutomaticLineBreak() )
            m_pEngine->SetPaperSize( Size( EMPTY_PAPER_SIZE, EMPTY_PAPER_SIZE ) );

        layoutWindow();
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::layoutWindow()
    {
        if ( !m_bHasEverBeenShown )
            // no need to do anything. Especially, no need to set the paper size on the
            // EditEngine to anything ....
            return;

        const StyleSettings& rStyleSettings = m_pAntiImpl->GetSettings().GetStyleSettings();

        long nScrollBarWidth = m_pVScroll ? rStyleSettings.GetScrollBarSize() : 0;
        long nScrollBarHeight = m_pHScroll ? rStyleSettings.GetScrollBarSize() : 0;

        if ( m_pAntiImpl->IsZoom() )
        {
            nScrollBarWidth = m_pAntiImpl->CalcZoom( nScrollBarWidth );
            nScrollBarHeight = m_pAntiImpl->CalcZoom( nScrollBarHeight );
        }

        // the overall size we can use
        Size aPlaygroundSizePixel( m_pAntiImpl->GetOutputSizePixel() );

        // the size of the viewport - note that the viewport does *not* occupy all the place
        // which is left when subtracting the scrollbar width/height
        Size aViewportPlaygroundPixel( aPlaygroundSizePixel );
        aViewportPlaygroundPixel.Width() = ::std::max( long( 10 ), long( aViewportPlaygroundPixel.Width() - nScrollBarWidth ) );
        aViewportPlaygroundPixel.Height() = ::std::max( long( 10 ), long( aViewportPlaygroundPixel.Height() - nScrollBarHeight ) );
        Size aViewportPlaygroundLogic( m_pViewport->PixelToLogic( aViewportPlaygroundPixel ) );

        const long nOffset = 2;
        Size aViewportSizePixel( aViewportPlaygroundPixel.Width() - 2 * nOffset, aViewportPlaygroundPixel.Height() - 2 * nOffset );
        Size aViewportSizeLogic( m_pViewport->PixelToLogic( aViewportSizePixel ) );

        // position the viewport
        m_pViewport->SetPosSizePixel( Point( nOffset, nOffset ), aViewportSizePixel );
        // position the scrollbars
        if ( m_pVScroll )
            m_pVScroll->SetPosSizePixel( Point( aViewportPlaygroundPixel.Width(), 0 ), Size( nScrollBarWidth, aViewportPlaygroundPixel.Height() ) );
        if ( m_pHScroll )
            m_pHScroll->SetPosSizePixel( Point( 0, aViewportPlaygroundPixel.Height() ), Size( aViewportPlaygroundPixel.Width(), nScrollBarHeight ) );
        if ( m_pScrollCorner )
            m_pScrollCorner->SetPosSizePixel( Point( aViewportPlaygroundPixel.Width(), aViewportPlaygroundPixel.Height() ), Size( nScrollBarWidth, nScrollBarHeight ) );

        // paper size
        if ( windowHasAutomaticLineBreak() )
            m_pEngine->SetPaperSize( Size( aViewportSizeLogic.Width(), m_pEngine->GetTextHeight() ) );

        // output area of the view
        m_pView->SetOutputArea( Rectangle( Point( ), aViewportSizeLogic ) );
        m_pView->SetVisArea( Rectangle( Point( ), aViewportSizeLogic ) );

        if ( m_pVScroll )
        {
            m_pVScroll->SetVisibleSize( aViewportPlaygroundLogic.Height() );

            // the default height of a text line ....
            long nFontHeight = m_pEngine->GetStandardFont(0).GetSize().Height();
            // ... is the scroll size for the vertical scrollbar
            m_pVScroll->SetLineSize( nFontHeight );
            // the viewport width, minus one line, is the page scroll size
            m_pVScroll->SetPageSize( ::std::max( nFontHeight, aViewportPlaygroundLogic.Height() - nFontHeight ) );
        }

        // the font width
        if ( m_pHScroll )
        {
            m_pHScroll->SetVisibleSize( aViewportPlaygroundLogic.Width() );

            long nFontWidth = m_pEngine->GetStandardFont(0).GetSize().Width();
            if ( !nFontWidth )
            {
                m_pViewport->Push( PUSH_FONT );
                m_pViewport->SetFont( m_pEngine->GetStandardFont(0) );
                nFontWidth = m_pViewport->GetTextWidth( String( RTL_CONSTASCII_USTRINGPARAM( "x" ) ) );
                m_pViewport->Pop();
            }
            // ... is the scroll size for the horizontal scrollbar
            m_pHScroll->SetLineSize( 5 * nFontWidth );
            // the viewport height, minus one character, is the page scroll size
            m_pHScroll->SetPageSize( ::std::max( nFontWidth, aViewportPlaygroundLogic.Width() - nFontWidth ) );
        }

        // update range and position of the scrollbars
        updateScrollbars();
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::updateScrollbars()
    {
        if ( m_pVScroll )
        {
            long nOverallTextHeight = m_pEngine->GetTextHeight();
            m_pVScroll->SetRange( Range( 0, nOverallTextHeight ) );
            m_pVScroll->SetThumbPos( m_pView->GetVisArea().Top() );
        }

        if ( m_pHScroll )
        {
            Size aPaperSize( m_pEngine->GetPaperSize() );
            long nOverallTextWidth = ( aPaperSize.Width() == EMPTY_PAPER_SIZE ) ? m_pEngine->CalcTextWidth() : aPaperSize.Width();
            m_pHScroll->SetRange( Range( 0, nOverallTextWidth ) );
            m_pHScroll->SetThumbPos( m_pView->GetVisArea().Left() );
        }
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::notifyInitShow()
    {
        if ( !m_bHasEverBeenShown )
        {
            m_bHasEverBeenShown = true;
            layoutWindow();
        }
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::notifyStyleChanged()
    {
        ensureScrollbars();
        ensureLineBreakSetting();
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::notifyZoomChanged()
    {
        const Fraction& rZoom = m_pAntiImpl->GetZoom();

        MapMode aMapMode( m_pAntiImpl->GetMapMode() );
        aMapMode.SetScaleX( rZoom );
        aMapMode.SetScaleY( rZoom );
        m_pAntiImpl->SetMapMode( aMapMode );

        m_pViewport->SetZoom( rZoom );
        m_pViewport->SetMapMode( aMapMode );

        layoutWindow();
    }

    //--------------------------------------------------------------------
    bool RichTextControlImpl::windowHasAutomaticLineBreak()
    {
        return ( m_pAntiImpl->GetStyle() & WB_WORDBREAK ) != 0;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::SetReadOnly( bool _bReadOnly )
    {
        m_pView->SetReadOnly( _bReadOnly );
    }

    //--------------------------------------------------------------------
    bool RichTextControlImpl::IsReadOnly() const
    {
        return m_pView->IsReadOnly( );
    }

    //--------------------------------------------------------------------
    namespace
    {
        static void lcl_inflate( Rectangle& _rRect, long _nInflateX, long _nInflateY )
        {
            _rRect.Left() -= _nInflateX;
            _rRect.Right() += _nInflateX;
            _rRect.Top() -= _nInflateY;
            _rRect.Bottom() += _nInflateY;
        }
    }
    //--------------------------------------------------------------------
    long RichTextControlImpl::HandleCommand( const CommandEvent& _rEvent )
    {
        if (  ( _rEvent.GetCommand() == COMMAND_WHEEL )
           || ( _rEvent.GetCommand() == COMMAND_STARTAUTOSCROLL )
           || ( _rEvent.GetCommand() == COMMAND_AUTOSCROLL )
           )
        {
            m_pAntiImpl->HandleScrollCommand( _rEvent, m_pHScroll, m_pVScroll );
            return 1;
        }
        return 0;
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::Draw( OutputDevice* _pDev, const Point& _rPos, const Size& _rSize, ULONG _nFlags )
    {
        // need to normalize the map mode of the device - every paint operation on any device needs
        // to use the same map mode
        _pDev->Push( PUSH_MAPMODE );

        // enforce our "normalize map mode" on the device
        MapMode aRefMapMode( m_pEngine->GetRefDevice()->GetMapMode() );
        MapMode aOriginalMapMode( _pDev->GetMapMode() );
        MapMode aNormalizedMapMode( aRefMapMode.GetMapUnit(), aRefMapMode.GetOrigin(), aOriginalMapMode.GetScaleX(), aOriginalMapMode.GetScaleY() );
        _pDev->SetMapMode( aNormalizedMapMode );

        // translate coordinates
        Point aPos( OutputDevice::LogicToLogic( _rPos, aOriginalMapMode, aNormalizedMapMode ) );
        Size aSize( OutputDevice::LogicToLogic( _rSize, aOriginalMapMode, aNormalizedMapMode ) );

        Rectangle aPlayground( aPos, aSize );
        Size aOnePixel( _pDev->PixelToLogic( Size( 1, 1 ) ) );

        if ( m_pAntiImpl->GetStyle() & WB_BORDER )
        {
            // let's draw a border
            _pDev->SetLineColor( COL_BLACK );
            _pDev->DrawRect( aPlayground );
            lcl_inflate( aPlayground, -aOnePixel.Width(), -aOnePixel.Height() );
        }

        // leave a space of one pixel between the "surroundings" of the control
        // and the content
        lcl_inflate( aPlayground, -aOnePixel.Width(), -aOnePixel.Height() );

        m_pEngine->Draw( _pDev, aPlayground, Point(), TRUE );

#ifdef DEBUG_DRAW_CONTROL
        _pDev->SetLineColor( COL_LIGHTRED );
        _pDev->DrawRect( Rectangle( aPlayground.TopLeft(), m_pEngine->GetPaperSize()) );
#endif

        _pDev->Pop();
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::SetBackgroundColor( )
    {
        SetBackgroundColor( Application::GetSettings().GetStyleSettings().GetFieldColor() );
    }

    //--------------------------------------------------------------------
    void RichTextControlImpl::SetBackgroundColor( const Color& _rColor )
    {
    Wallpaper aWallpaper( _rColor );
        m_pAntiImpl->SetBackground( aWallpaper );
        m_pViewport->SetBackground( aWallpaper );
    }

//........................................................................
}   // namespace frm
//........................................................................