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 #include <pdfiprocessor.hxx>
22 #include <xmlemitter.hxx>
23 #include <pdfihelper.hxx>
24 #include <imagecontainer.hxx>
25 #include "style.hxx"
26 #include "drawtreevisiting.hxx"
27 #include <genericelements.hxx>
28 
29 #include <basegfx/polygon/b2dpolypolygontools.hxx>
30 #include <basegfx/range/b2drange.hxx>
31 #include <osl/diagnose.h>
32 #include <com/sun/star/i18n/BreakIterator.hpp>
33 #include <com/sun/star/i18n/CharacterClassification.hpp>
34 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
35 #include <com/sun/star/i18n/ScriptType.hpp>
36 #include <com/sun/star/i18n/DirectionProperty.hpp>
37 
38 #include <string.h>
39 
40 using namespace ::com::sun::star;
41 using namespace ::com::sun::star::lang;
42 using namespace ::com::sun::star::i18n;
43 using namespace ::com::sun::star::uno;
44 
45 namespace pdfi
46 {
47 
48 const Reference< XBreakIterator >& DrawXmlOptimizer::GetBreakIterator()
49 {
50     if ( !mxBreakIter.is() )
51     {
52         Reference< XComponentContext > xContext( m_rProcessor.m_xContext, uno::UNO_SET_THROW );
53         mxBreakIter = BreakIterator::create(xContext);
54     }
55     return mxBreakIter;
56 }
57 
58 const Reference< XCharacterClassification >& DrawXmlEmitter::GetCharacterClassification()
59 {
60     if ( !mxCharClass.is() )
61     {
62         Reference< XComponentContext > xContext( m_rEmitContext.m_xContext, uno::UNO_SET_THROW );
63         mxCharClass = CharacterClassification::create(xContext);
64     }
65     return mxCharClass;
66 }
67 
68 void DrawXmlEmitter::visit( HyperlinkElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&   )
69 {
70     if( elem.Children.empty() )
71         return;
72 
73     const char* pType = dynamic_cast<DrawElement*>(elem.Children.front().get()) ? "draw:a" : "text:a";
74 
75     PropertyMap aProps;
76     aProps[ "xlink:type" ] = "simple";
77     aProps[ "xlink:href" ] = elem.URI;
78     aProps[ "office:target-frame-name" ] = "_blank";
79     aProps[ "xlink:show" ] = "new";
80 
81     m_rEmitContext.rEmitter.beginTag( pType, aProps );
82     auto this_it = elem.Children.begin();
83     while( this_it != elem.Children.end() && this_it->get() != &elem )
84     {
85         (*this_it)->visitedBy( *this, this_it );
86         ++this_it;
87     }
88     m_rEmitContext.rEmitter.endTag( pType );
89 }
90 
91 void DrawXmlEmitter::visit( TextElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&   )
92 {
93     if( elem.Text.isEmpty() )
94         return;
95 
96     OUString strSpace(u' ');
97     OUString strNbSpace(u'\x00A0');
98     OUString tabSpace(u'\x0009');
99     PropertyMap aProps;
100     if( elem.StyleId != -1 )
101     {
102         aProps[ OUString( "text:style-name"  ) ] =
103             m_rEmitContext.rStyles.getStyleName( elem.StyleId );
104     }
105 
106     OUString str(elem.Text.getStr());
107 
108     // Check for RTL
109     bool isRTL = false;
110     Reference< i18n::XCharacterClassification > xCC( GetCharacterClassification() );
111     if( xCC.is() )
112     {
113         for(int i=1; i< elem.Text.getLength(); i++)
114         {
115             css::i18n::DirectionProperty nType = static_cast<css::i18n::DirectionProperty>(xCC->getCharacterDirection( str, i ));
116             if ( nType == css::i18n::DirectionProperty_RIGHT_TO_LEFT           ||
117                  nType == css::i18n::DirectionProperty_RIGHT_TO_LEFT_ARABIC    ||
118                  nType == css::i18n::DirectionProperty_RIGHT_TO_LEFT_EMBEDDING ||
119                  nType == css::i18n::DirectionProperty_RIGHT_TO_LEFT_OVERRIDE
120                 )
121                 isRTL = true;
122         }
123     }
124 
125     if (isRTL)  // If so, reverse string
126         str = PDFIProcessor::mirrorString( str );
127 
128     m_rEmitContext.rEmitter.beginTag( "text:span", aProps );
129 
130     for(int i=0; i< elem.Text.getLength(); i++)
131     {
132         OUString strToken=  str.copy(i,1) ;
133         if( strSpace == strToken || strNbSpace == strToken )
134         {
135             aProps[ "text:c" ] = "1";
136             m_rEmitContext.rEmitter.beginTag( "text:s", aProps );
137             m_rEmitContext.rEmitter.endTag( "text:s");
138         }
139         else
140         {
141             if( tabSpace == strToken )
142             {
143                 m_rEmitContext.rEmitter.beginTag( "text:tab", aProps );
144                 m_rEmitContext.rEmitter.endTag( "text:tab");
145             }
146             else
147             {
148                 m_rEmitContext.rEmitter.write( strToken );
149             }
150         }
151     }
152 
153     auto this_it = elem.Children.begin();
154     while( this_it != elem.Children.end() && this_it->get() != &elem )
155     {
156         (*this_it)->visitedBy( *this, this_it );
157         ++this_it;
158     }
159 
160     m_rEmitContext.rEmitter.endTag( "text:span" );
161 }
162 
163 void DrawXmlEmitter::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&   )
164 {
165     PropertyMap aProps;
166     if( elem.StyleId != -1 )
167     {
168         aProps[ "text:style-name" ] = m_rEmitContext.rStyles.getStyleName( elem.StyleId );
169     }
170     const char* pTagType = "text:p";
171     if( elem.Type == ParagraphElement::Headline )
172         pTagType = "text:h";
173     m_rEmitContext.rEmitter.beginTag( pTagType, aProps );
174 
175     auto this_it = elem.Children.begin();
176     while( this_it != elem.Children.end() && this_it->get() != &elem )
177     {
178         (*this_it)->visitedBy( *this, this_it );
179         ++this_it;
180     }
181 
182     m_rEmitContext.rEmitter.endTag( pTagType );
183 }
184 
185 void DrawXmlEmitter::fillFrameProps( DrawElement&       rElem,
186                                      PropertyMap&       rProps,
187                                      const EmitContext& rEmitContext,
188                                      bool               bWasTransformed
189                                      )
190 {
191     rProps[ "draw:z-index" ] = OUString::number( rElem.ZOrder );
192     rProps[ "draw:style-name"] = rEmitContext.rStyles.getStyleName( rElem.StyleId );
193 
194     if (rElem.IsForText)
195         rProps["draw:text-style-name"] = rEmitContext.rStyles.getStyleName(rElem.TextStyleId);
196 
197     const GraphicsContext& rGC =
198         rEmitContext.rProcessor.getGraphicsContext( rElem.GCId );
199 
200     if (bWasTransformed)
201     {
202         rProps[ "svg:x" ]       = convertPixelToUnitString(rElem.x);
203         rProps[ "svg:y" ]       = convertPixelToUnitString(rElem.y);
204         rProps[ "svg:width" ]   = convertPixelToUnitString(rElem.w);
205         rProps[ "svg:height" ]  = convertPixelToUnitString(rElem.h);
206     }
207     else
208     {
209         OUStringBuffer aBuf(256);
210 
211         basegfx::B2DHomMatrix mat(rGC.Transformation);
212 
213         if (rElem.MirrorVertical)
214         {
215             basegfx::B2DHomMatrix mat2;
216             mat2.translate(0, -0.5);
217             mat2.scale(1, -1);
218             mat2.translate(0, 0.5);
219             mat = mat * mat2;
220         }
221 
222         double scale = convPx2mm(100);
223         mat.scale(scale, scale);
224 
225         aBuf.append("matrix(");
226         aBuf.append(mat.get(0, 0));
227         aBuf.append(' ');
228         aBuf.append(mat.get(1, 0));
229         aBuf.append(' ');
230         aBuf.append(mat.get(0, 1));
231         aBuf.append(' ');
232         aBuf.append(mat.get(1, 1));
233         aBuf.append(' ');
234         aBuf.append(mat.get(0, 2));
235         aBuf.append(' ');
236         aBuf.append(mat.get(1, 2));
237         aBuf.append(")");
238 
239         rProps["draw:transform"] = aBuf.makeStringAndClear();
240     }
241 }
242 
243 void DrawXmlEmitter::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&   )
244 {
245     if( elem.Children.empty() )
246         return;
247 
248     bool bTextBox = (dynamic_cast<ParagraphElement*>(elem.Children.front().get()) != nullptr);
249     PropertyMap aFrameProps;
250     fillFrameProps( elem, aFrameProps, m_rEmitContext, false );
251     m_rEmitContext.rEmitter.beginTag( "draw:frame", aFrameProps );
252     if( bTextBox )
253         m_rEmitContext.rEmitter.beginTag( "draw:text-box", PropertyMap() );
254 
255     auto this_it = elem.Children.begin();
256     while( this_it != elem.Children.end() && this_it->get() != &elem )
257     {
258         (*this_it)->visitedBy( *this, this_it );
259         ++this_it;
260     }
261 
262     if( bTextBox )
263         m_rEmitContext.rEmitter.endTag( "draw:text-box" );
264     m_rEmitContext.rEmitter.endTag( "draw:frame" );
265 }
266 
267 void DrawXmlEmitter::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
268 {
269     elem.updateGeometry();
270     /* note:
271      *   aw recommends using 100dth of mm in all respects since the xml import
272      *   (a) is buggy (see issue 37213)
273      *   (b) is optimized for 100dth of mm and does not scale itself then,
274      *       this does not gain us speed but makes for smaller rounding errors since
275      *       the xml importer coordinates are integer based
276      */
277     for (sal_uInt32 i = 0; i< elem.PolyPoly.count(); i++)
278     {
279         basegfx::B2DPolygon b2dPolygon =  elem.PolyPoly.getB2DPolygon( i );
280 
281         for ( sal_uInt32 j = 0; j< b2dPolygon.count(); j++ )
282         {
283             basegfx::B2DPoint point;
284             basegfx::B2DPoint nextPoint;
285             point = b2dPolygon.getB2DPoint( j );
286 
287             basegfx::B2DPoint prevPoint = b2dPolygon.getPrevControlPoint( j ) ;
288 
289             point.setX( convPx2mmPrec2( point.getX() )*100.0 );
290             point.setY( convPx2mmPrec2( point.getY() )*100.0 );
291 
292             if ( b2dPolygon.isPrevControlPointUsed( j ) )
293             {
294                 prevPoint.setX( convPx2mmPrec2( prevPoint.getX() )*100.0 );
295                 prevPoint.setY( convPx2mmPrec2( prevPoint.getY() )*100.0 );
296             }
297 
298             if ( b2dPolygon.isNextControlPointUsed( j ) )
299             {
300                 nextPoint = b2dPolygon.getNextControlPoint( j ) ;
301                 nextPoint.setX( convPx2mmPrec2( nextPoint.getX() )*100.0 );
302                 nextPoint.setY( convPx2mmPrec2( nextPoint.getY() )*100.0 );
303             }
304 
305             b2dPolygon.setB2DPoint( j, point );
306 
307             if ( b2dPolygon.isPrevControlPointUsed( j ) )
308                 b2dPolygon.setPrevControlPoint( j , prevPoint ) ;
309 
310             if ( b2dPolygon.isNextControlPointUsed( j ) )
311                 b2dPolygon.setNextControlPoint( j , nextPoint ) ;
312         }
313 
314         elem.PolyPoly.setB2DPolygon( i, b2dPolygon );
315     }
316 
317     PropertyMap aProps;
318     // PDFIProcessor transforms geometrical objects, not images and text
319     // so we need to tell fillFrameProps here that the transformation for
320     // a PolyPolyElement was already applied (aside form translation)
321     fillFrameProps( elem, aProps, m_rEmitContext, true );
322     OUStringBuffer aBuf( 64 );
323     aBuf.append( "0 0 " );
324     aBuf.append( convPx2mmPrec2(elem.w)*100.0 );
325     aBuf.append( ' ' );
326     aBuf.append( convPx2mmPrec2(elem.h)*100.0 );
327     aProps[ "svg:viewBox" ] = aBuf.makeStringAndClear();
328     aProps[ "svg:d" ]       = basegfx::utils::exportToSvgD( elem.PolyPoly, false, true, false );
329 
330     m_rEmitContext.rEmitter.beginTag( "draw:path", aProps );
331     m_rEmitContext.rEmitter.endTag( "draw:path" );
332 }
333 
334 void DrawXmlEmitter::visit( ImageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
335 {
336     PropertyMap aImageProps;
337     m_rEmitContext.rEmitter.beginTag( "draw:image", aImageProps );
338     m_rEmitContext.rEmitter.beginTag( "office:binary-data", PropertyMap() );
339     m_rEmitContext.rImages.writeBase64EncodedStream( elem.Image, m_rEmitContext);
340     m_rEmitContext.rEmitter.endTag( "office:binary-data" );
341     m_rEmitContext.rEmitter.endTag( "draw:image" );
342 }
343 
344 void DrawXmlEmitter::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&   )
345 {
346     PropertyMap aPageProps;
347     aPageProps[ "draw:master-page-name" ] = m_rEmitContext.rStyles.getStyleName( elem.StyleId );
348 
349     m_rEmitContext.rEmitter.beginTag("draw:page", aPageProps);
350 
351     if( m_rEmitContext.xStatusIndicator.is() )
352         m_rEmitContext.xStatusIndicator->setValue( elem.PageNumber );
353 
354     auto this_it = elem.Children.begin();
355     while( this_it != elem.Children.end() && this_it->get() != &elem )
356     {
357         (*this_it)->visitedBy( *this, this_it );
358         ++this_it;
359     }
360 
361     m_rEmitContext.rEmitter.endTag("draw:page");
362 }
363 
364 void DrawXmlEmitter::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&)
365 {
366     m_rEmitContext.rEmitter.beginTag( "office:body", PropertyMap() );
367     m_rEmitContext.rEmitter.beginTag( m_bWriteDrawDocument ? "office:drawing" : "office:presentation",
368                                       PropertyMap() );
369 
370     auto this_it = elem.Children.begin();
371     while( this_it != elem.Children.end() && this_it->get() != &elem )
372     {
373         (*this_it)->visitedBy( *this, this_it );
374         ++this_it;
375     }
376 
377     m_rEmitContext.rEmitter.endTag( m_bWriteDrawDocument ? "office:drawing" : "office:presentation" );
378     m_rEmitContext.rEmitter.endTag( "office:body" );
379 }
380 
381 
382 void DrawXmlOptimizer::visit( HyperlinkElement&, const std::list< std::unique_ptr<Element> >::const_iterator& )
383 {
384 }
385 
386 void DrawXmlOptimizer::visit( TextElement&, const std::list< std::unique_ptr<Element> >::const_iterator&)
387 {
388 }
389 
390 void DrawXmlOptimizer::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
391 {
392     elem.applyToChildren(*this);
393 }
394 
395 void DrawXmlOptimizer::visit( ImageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& )
396 {
397 }
398 
399 void DrawXmlOptimizer::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& elemIt )
400 {
401     /* note: optimize two consecutive PolyPolyElements that
402      *  have the same path but one of which is a stroke while
403      *     the other is a fill
404      */
405     if( !elem.Parent )
406         return;
407 
408     // find following PolyPolyElement in parent's children list
409     if( elemIt == elem.Parent->Children.end() )
410         return;
411     auto next_it = elemIt;
412     ++next_it;
413     if( next_it == elem.Parent->Children.end() )
414         return;
415 
416     PolyPolyElement* pNext = dynamic_cast<PolyPolyElement*>(next_it->get());
417     // TODO(F2): this comparison fails for OOo-generated polygons with beziers.
418     if( !pNext || pNext->PolyPoly != elem.PolyPoly )
419         return;
420 
421     const GraphicsContext& rNextGC =
422                    m_rProcessor.getGraphicsContext( pNext->GCId );
423     const GraphicsContext& rThisGC =
424                    m_rProcessor.getGraphicsContext( elem.GCId );
425 
426     if( !(rThisGC.BlendMode      == rNextGC.BlendMode &&
427          rThisGC.Flatness       == rNextGC.Flatness &&
428          rThisGC.Transformation == rNextGC.Transformation &&
429          rThisGC.Clip           == rNextGC.Clip &&
430          rThisGC.FillColor.Red  == rNextGC.FillColor.Red &&
431          rThisGC.FillColor.Green== rNextGC.FillColor.Green &&
432          rThisGC.FillColor.Blue == rNextGC.FillColor.Blue &&
433          rThisGC.FillColor.Alpha== rNextGC.FillColor.Alpha &&
434          pNext->Action          == PATH_STROKE &&
435          (elem.Action == PATH_FILL || elem.Action == PATH_EOFILL)) )
436         return;
437 
438     GraphicsContext aGC = rThisGC;
439     aGC.LineJoin  = rNextGC.LineJoin;
440     aGC.LineCap   = rNextGC.LineCap;
441     aGC.LineWidth = rNextGC.LineWidth;
442     aGC.MiterLimit= rNextGC.MiterLimit;
443     aGC.DashArray = rNextGC.DashArray;
444     aGC.LineColor = rNextGC.LineColor;
445     elem.GCId = m_rProcessor.getGCId( aGC );
446 
447     elem.Action |= pNext->Action;
448 
449     elem.Children.splice( elem.Children.end(), pNext->Children );
450     elem.Parent->Children.erase(next_it);
451 }
452 
453 void DrawXmlOptimizer::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
454 {
455     optimizeTextElements( elem );
456 
457     elem.applyToChildren(*this);
458 }
459 
460 void DrawXmlOptimizer::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
461 {
462     if( m_rProcessor.getStatusIndicator().is() )
463         m_rProcessor.getStatusIndicator()->setValue( elem.PageNumber );
464 
465     // resolve hyperlinks
466     elem.resolveHyperlinks();
467 
468     elem.resolveFontStyles( m_rProcessor ); // underlines and such
469 
470     // FIXME: until hyperlinks and font effects are adjusted for
471     // geometrical search handle them before sorting
472     PDFIProcessor::sortElements( &elem );
473 
474     // find paragraphs in text
475     ParagraphElement* pCurPara = nullptr;
476     std::list< std::unique_ptr<Element> >::iterator page_element, next_page_element;
477     next_page_element = elem.Children.begin();
478     double fCurLineHeight = 0.0; // average height of text items in current para
479     int nCurLineElements = 0; // number of line contributing elements in current para
480     double line_left = elem.w, line_right = 0.0;
481     double column_width = elem.w*0.75; // estimate text width
482     // TODO: guess columns
483     while( next_page_element != elem.Children.end() )
484     {
485         page_element = next_page_element++;
486         ParagraphElement* pPagePara = dynamic_cast<ParagraphElement*>(page_element->get());
487         if( pPagePara )
488         {
489             pCurPara = pPagePara;
490             // adjust line height and text items
491             fCurLineHeight = 0.0;
492             nCurLineElements = 0;
493             for( auto& rxChild : pCurPara->Children )
494             {
495                 TextElement* pTestText = dynamic_cast<TextElement*>(rxChild.get());
496                 if( pTestText )
497                 {
498                     fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pTestText->h)/double(nCurLineElements+1);
499                     nCurLineElements++;
500                 }
501             }
502             continue;
503         }
504 
505         HyperlinkElement* pLink = dynamic_cast<HyperlinkElement*>(page_element->get());
506         DrawElement* pDraw = dynamic_cast<DrawElement*>(page_element->get());
507         if( ! pDraw && pLink && ! pLink->Children.empty() )
508             pDraw = dynamic_cast<DrawElement*>(pLink->Children.front().get() );
509         if( pDraw )
510         {
511             // insert small drawing objects as character, else leave them page bound
512 
513             bool bInsertToParagraph = false;
514             // first check if this is either inside the paragraph
515             if( pCurPara && pDraw->y < pCurPara->y + pCurPara->h )
516             {
517                 if( pDraw->h < fCurLineHeight * 1.5 )
518                 {
519                     bInsertToParagraph = true;
520                     fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pDraw->h)/double(nCurLineElements+1);
521                     nCurLineElements++;
522                     // mark draw element as character
523                     pDraw->isCharacter = true;
524                 }
525             }
526             // or perhaps the draw element begins a new paragraph
527             else if( next_page_element != elem.Children.end() )
528             {
529                 TextElement* pText = dynamic_cast<TextElement*>(next_page_element->get());
530                 if( ! pText )
531                 {
532                     ParagraphElement* pPara = dynamic_cast<ParagraphElement*>(next_page_element->get());
533                     if( pPara && ! pPara->Children.empty() )
534                         pText = dynamic_cast<TextElement*>(pPara->Children.front().get());
535                 }
536                 if( pText && // check there is a text
537                     pDraw->h < pText->h*1.5 && // and it is approx the same height
538                     // and either upper or lower edge of pDraw is inside text's vertical range
539                     ( ( pDraw->y >= pText->y && pDraw->y <= pText->y+pText->h ) ||
540                       ( pDraw->y+pDraw->h >= pText->y && pDraw->y+pDraw->h <= pText->y+pText->h )
541                       )
542                     )
543                 {
544                     bInsertToParagraph = true;
545                     fCurLineHeight = pDraw->h;
546                     nCurLineElements = 1;
547                     line_left = pDraw->x;
548                     line_right = pDraw->x + pDraw->w;
549                     // begin a new paragraph
550                     pCurPara = nullptr;
551                     // mark draw element as character
552                     pDraw->isCharacter = true;
553                 }
554             }
555 
556             if( ! bInsertToParagraph )
557             {
558                 pCurPara = nullptr;
559                 continue;
560             }
561         }
562 
563         TextElement* pText = dynamic_cast<TextElement*>(page_element->get());
564         if( ! pText && pLink && ! pLink->Children.empty() )
565             pText = dynamic_cast<TextElement*>(pLink->Children.front().get());
566         if( pText )
567         {
568             Element* pGeo = pLink ? static_cast<Element*>(pLink) :
569                                     static_cast<Element*>(pText);
570             if( pCurPara )
571             {
572                 // there was already a text element, check for a new paragraph
573                 if( nCurLineElements > 0 )
574                 {
575                     // if the new text is significantly distant from the paragraph
576                     // begin a new paragraph
577                     if( pGeo->y > pCurPara->y + pCurPara->h + fCurLineHeight*0.5  )
578                         pCurPara = nullptr; // insert new paragraph
579                     else if( pGeo->y > (pCurPara->y+pCurPara->h - fCurLineHeight*0.05) )
580                     {
581                         // new paragraph if either the last line of the paragraph
582                         // was significantly shorter than the paragraph as a whole
583                         if( (line_right - line_left) < pCurPara->w*0.75 )
584                             pCurPara = nullptr;
585                         // or the last line was significantly smaller than the column width
586                         else if( (line_right - line_left) < column_width*0.75 )
587                             pCurPara = nullptr;
588                     }
589                 }
590 
591 
592             }
593 
594 
595             // update line height/width
596             if( pCurPara )
597             {
598                 fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pGeo->h)/double(nCurLineElements+1);
599                 nCurLineElements++;
600                 if( pGeo->x < line_left )
601                     line_left = pGeo->x;
602                 if( pGeo->x+pGeo->w > line_right )
603                     line_right = pGeo->x+pGeo->w;
604             }
605             else
606             {
607                 fCurLineHeight = pGeo->h;
608                 nCurLineElements = 1;
609                 line_left = pGeo->x;
610                 line_right = pGeo->x + pGeo->w;
611             }
612         }
613 
614 
615         // move element to current paragraph
616         if (! pCurPara )  // new paragraph, insert one
617         {
618             pCurPara = ElementFactory::createParagraphElement( nullptr );
619             // set parent
620             pCurPara->Parent = &elem;
621             //insert new paragraph before current element
622             page_element = elem.Children.insert( page_element, std::unique_ptr<Element>(pCurPara) );
623             // forward iterator to current element again
624             ++ page_element;
625             // update next_element which is now invalid
626             next_page_element = page_element;
627             ++ next_page_element;
628         }
629         Element* pCurEle = page_element->get();
630         Element::setParent( page_element, pCurPara );
631         OSL_ENSURE( !pText || pCurEle == pText || pCurEle == pLink, "paragraph child list in disorder" );
632         if( pText || pDraw )
633             pCurPara->updateGeometryWith( pCurEle );
634     }
635 
636     // process children
637     elem.applyToChildren(*this);
638 }
639 
640 static bool isSpaces(TextElement* pTextElem)
641 {
642     for (sal_Int32 i = 0; i != pTextElem->Text.getLength(); ++i) {
643         if (pTextElem->Text[i] != ' ') {
644             return false;
645         }
646     }
647     return true;
648 }
649 
650 static bool notTransformed(const GraphicsContext& GC)
651 {
652     return
653         rtl::math::approxEqual(GC.Transformation.get(0,0), 100.00) &&
654         GC.Transformation.get(1,0) == 0.00 &&
655         GC.Transformation.get(0,1) == 0.00 &&
656         rtl::math::approxEqual(GC.Transformation.get(1,1), -100.00);
657 }
658 
659 void DrawXmlOptimizer::optimizeTextElements(Element& rParent)
660 {
661     if( rParent.Children.empty() ) // this should not happen
662     {
663         OSL_FAIL( "empty paragraph optimized" );
664         return;
665     }
666 
667     // concatenate child elements with same font id
668     auto next = rParent.Children.begin();
669     auto it = next++;
670 
671     while( next != rParent.Children.end() )
672     {
673         bool bConcat = false;
674         TextElement* pCur = dynamic_cast<TextElement*>(it->get());
675 
676         if( pCur )
677         {
678             TextElement* pNext = dynamic_cast<TextElement*>(next->get());
679             bool isComplex = false;
680             OUString str(pCur->Text.getStr());
681             for(int i=0; i< str.getLength(); i++)
682             {
683                 sal_Int16 nType = GetBreakIterator()->getScriptType( str, i );
684                 if (nType == css::i18n::ScriptType::COMPLEX)
685                     isComplex = true;
686             }
687             bool bPara = strspn("ParagraphElement", typeid(rParent).name());
688             ParagraphElement* pPara = dynamic_cast<ParagraphElement*>(&rParent);
689             if (bPara && pPara && isComplex)
690                 pPara->bRtl = true;
691             if( pNext )
692             {
693                 const GraphicsContext& rCurGC = m_rProcessor.getGraphicsContext( pCur->GCId );
694                 const GraphicsContext& rNextGC = m_rProcessor.getGraphicsContext( pNext->GCId );
695 
696                 // line and space optimization; works only in strictly horizontal mode
697 
698                 // concatenate consecutive text elements unless there is a
699                 // font or text color or matrix change, leave a new span in that case
700                 if( (pCur->FontId == pNext->FontId || isSpaces(pNext)) &&
701                     rCurGC.FillColor.Red == rNextGC.FillColor.Red &&
702                     rCurGC.FillColor.Green == rNextGC.FillColor.Green &&
703                     rCurGC.FillColor.Blue == rNextGC.FillColor.Blue &&
704                     rCurGC.FillColor.Alpha == rNextGC.FillColor.Alpha &&
705                     (rCurGC.Transformation == rNextGC.Transformation || notTransformed(rNextGC))
706                     )
707                 {
708                     pCur->updateGeometryWith( pNext );
709                     // append text to current element
710                     pCur->Text.append( pNext->Text );
711 
712                     str = pCur->Text.getStr();
713                     for(int i=0; i< str.getLength(); i++)
714                     {
715                         sal_Int16 nType = GetBreakIterator()->getScriptType( str, i );
716                         if (nType == css::i18n::ScriptType::COMPLEX)
717                             isComplex = true;
718                     }
719                     if (bPara && pPara && isComplex)
720                         pPara->bRtl = true;
721                     // append eventual children to current element
722                     // and clear children (else the children just
723                     // appended to pCur would be destroyed)
724                     pCur->Children.splice( pCur->Children.end(), pNext->Children );
725                     // get rid of the now useless element
726                     rParent.Children.erase( next );
727                     bConcat = true;
728                 }
729             }
730         }
731         else if( dynamic_cast<HyperlinkElement*>(it->get()) )
732             optimizeTextElements( **it );
733         if ( bConcat )
734             next = it;
735         else
736             ++it;
737         ++next;
738     }
739 }
740 
741 void DrawXmlOptimizer::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&)
742 {
743     elem.applyToChildren(*this);
744 }
745 
746 
747 void DrawXmlFinalizer::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
748 {
749     // xxx TODO copied from DrawElement
750     const GraphicsContext& rGC = m_rProcessor.getGraphicsContext(elem.GCId );
751 
752     PropertyMap aProps;
753     aProps[ "style:family" ] = "graphic";
754     aProps[ "style:parent-style-name" ] = "standard";
755     // generate standard graphic style if necessary
756     m_rStyleContainer.getStandardStyleId( "graphic" );
757 
758     PropertyMap aGCProps;
759     if (elem.Action & PATH_STROKE)
760     {
761         double scale = GetAverageTransformationScale(rGC.Transformation);
762         if (rGC.DashArray.size() < 2)
763         {
764             aGCProps[ "draw:stroke" ] = "solid";
765         }
766         else
767         {
768             PropertyMap props;
769             FillDashStyleProps(props, rGC.DashArray, scale);
770             StyleContainer::Style style("draw:stroke-dash", props);
771 
772             aGCProps[ "draw:stroke" ] = "dash";
773             aGCProps[ "draw:stroke-dash" ] =
774                 m_rStyleContainer.getStyleName(
775                 m_rStyleContainer.getStyleId(style));
776         }
777 
778         aGCProps[ "svg:stroke-color" ] = getColorString(rGC.LineColor);
779         if (rGC.LineColor.Alpha != 1.0)
780             aGCProps["svg:stroke-opacity"] = getPercentString(rGC.LineColor.Alpha * 100.0);
781         aGCProps[ "svg:stroke-width" ] = convertPixelToUnitString(rGC.LineWidth * scale);
782         aGCProps[ "draw:stroke-linejoin" ] = rGC.GetLineJoinString();
783         aGCProps[ "svg:stroke-linecap" ] = rGC.GetLineCapString();
784     }
785     else
786     {
787         aGCProps[ "draw:stroke" ] = "none";
788     }
789 
790     // TODO(F1): check whether stuff could be emulated by gradient/bitmap/hatch
791     if( elem.Action & (PATH_FILL | PATH_EOFILL) )
792     {
793         aGCProps[ "draw:fill" ]   = "solid";
794         aGCProps[ "draw:fill-color" ] = getColorString(rGC.FillColor);
795         if (rGC.FillColor.Alpha != 1.0)
796             aGCProps["draw:opacity"] = getPercentString(rGC.FillColor.Alpha * 100.0);
797     }
798     else
799     {
800         aGCProps[ "draw:fill" ] = "none";
801     }
802 
803     StyleContainer::Style aStyle( "style:style", aProps );
804     StyleContainer::Style aSubStyle( "style:graphic-properties", aGCProps );
805     aStyle.SubStyles.push_back( &aSubStyle );
806 
807     elem.StyleId = m_rStyleContainer.getStyleId( aStyle );
808 }
809 
810 void DrawXmlFinalizer::visit( HyperlinkElement&, const std::list< std::unique_ptr<Element> >::const_iterator& )
811 {
812 }
813 
814 static void SetFontsizeProperties(PropertyMap& props, double fontSize)
815 {
816     OUStringBuffer aBuf(32);
817     aBuf.append(fontSize * 72 / PDFI_OUTDEV_RESOLUTION);
818     aBuf.append("pt");
819     OUString aFSize = aBuf.makeStringAndClear();
820     props["fo:font-size"] = aFSize;
821     props["style:font-size-asian"] = aFSize;
822     props["style:font-size-complex"] = aFSize;
823 }
824 
825 void DrawXmlFinalizer::visit( TextElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
826 {
827     const FontAttributes& rFont = m_rProcessor.getFont( elem.FontId );
828     PropertyMap aProps;
829     aProps[ "style:family" ] = "text";
830 
831     PropertyMap aFontProps;
832 
833     // family name
834     aFontProps[ "fo:font-family" ] = rFont.familyName;
835     aFontProps[ "style:font-family-complex" ] = rFont.familyName;
836 
837     // bold
838     if( rFont.isBold )
839     {
840         aFontProps[ "fo:font-weight" ]         = "bold";
841         aFontProps[ "fo:font-weight-asian" ]   = "bold";
842         aFontProps[ "style:font-weight-complex" ] = "bold";
843     }
844     // italic
845     if( rFont.isItalic )
846     {
847         aFontProps[ "fo:font-style" ]         = "italic";
848         aFontProps[ "fo:font-style-asian" ]   = "italic";
849         aFontProps[ "style:font-style-complex" ] = "italic";
850     }
851     // underline
852     if( rFont.isUnderline )
853     {
854         aFontProps[ "style:text-underline-style" ]  = "solid";
855         aFontProps[ "style:text-underline-width" ]  = "auto";
856         aFontProps[ "style:text-underline-color" ]  = "font-color";
857     }
858     // outline
859     if( rFont.isOutline )
860     {
861         aFontProps[ "style:text-outline" ]  = "true";
862     }
863 
864     // size
865     SetFontsizeProperties(aFontProps, rFont.size);
866 
867     // color
868     const GraphicsContext& rGC = m_rProcessor.getGraphicsContext( elem.GCId );
869     aFontProps[ "fo:color" ] = getColorString( rFont.isOutline ? rGC.LineColor : rGC.FillColor );
870 
871     // scale
872     double fRotate, fShearX;
873     basegfx::B2DTuple aScale, aTranslation;
874     rGC.Transformation.decompose(aScale, aTranslation, fRotate, fShearX);
875     double textScale = 100 * aScale.getX() / aScale.getY();
876     if (((textScale >= 1) && (textScale <= 99)) ||
877         ((textScale >= 101) && (textScale <= 999)))
878     {
879         aFontProps[ "style:text-scale" ] = getPercentString(textScale);
880     }
881 
882     StyleContainer::Style aStyle( "style:style", aProps );
883     StyleContainer::Style aSubStyle( "style:text-properties", aFontProps );
884     aStyle.SubStyles.push_back( &aSubStyle );
885     elem.StyleId = m_rStyleContainer.getStyleId( aStyle );
886 }
887 
888 void DrawXmlFinalizer::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
889 {
890 
891     PropertyMap aProps;
892     aProps[ "style:family" ] = "paragraph";
893     // generate standard paragraph style if necessary
894     m_rStyleContainer.getStandardStyleId( "paragraph" );
895 
896     PropertyMap aParProps;
897 
898     aParProps[ "fo:text-align"]                   = "start";
899     if (elem.bRtl)
900         aParProps[ "style:writing-mode"]                    = "rl-tb";
901     else
902         aParProps[ "style:writing-mode"]                    = "lr-tb";
903 
904     StyleContainer::Style aStyle( "style:style", aProps );
905     StyleContainer::Style aSubStyle( "style:paragraph-properties", aParProps );
906     aStyle.SubStyles.push_back( &aSubStyle );
907 
908     elem.StyleId = m_rStyleContainer.getStyleId( aStyle );
909 
910     elem.applyToChildren(*this);
911 }
912 
913 void DrawXmlFinalizer::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&)
914 {
915     PropertyMap props1;
916     props1[ "style:family" ] = "graphic";
917     props1[ "style:parent-style-name" ] = "standard";
918     // generate standard graphic style if necessary
919     m_rStyleContainer.getStandardStyleId( "graphic" );
920 
921     PropertyMap aGCProps;
922 
923     aGCProps[ "draw:stroke" ]                    = "none";
924     aGCProps[ "draw:fill" ]                      = "none";
925     aGCProps[ "draw:auto-grow-height" ]          = "true";
926     aGCProps[ "draw:auto-grow-width" ]           = "true";
927     aGCProps[ "draw:textarea-horizontal-align" ] = "left";
928     aGCProps[ "draw:textarea-vertical-align" ]   = "top";
929     aGCProps[ "fo:min-height"]                   = "0cm";
930     aGCProps[ "fo:min-width"]                    = "0cm";
931     aGCProps[ "fo:padding-top" ]                 = "0cm";
932     aGCProps[ "fo:padding-left" ]                = "0cm";
933     aGCProps[ "fo:padding-right" ]               = "0cm";
934     aGCProps[ "fo:padding-bottom" ]              = "0cm";
935 
936     StyleContainer::Style style1( "style:style", props1 );
937     StyleContainer::Style subStyle1( "style:graphic-properties", aGCProps );
938     style1.SubStyles.push_back(&subStyle1);
939 
940     elem.StyleId = m_rStyleContainer.getStyleId(style1);
941 
942     if (elem.IsForText)
943     {
944         PropertyMap props2;
945         props2["style:family"] = "paragraph";
946 
947         PropertyMap textProps;
948         SetFontsizeProperties(textProps, elem.FontSize);
949 
950         StyleContainer::Style style2("style:style", props2);
951         StyleContainer::Style subStyle2("style:text-properties", textProps);
952         style2.SubStyles.push_back(&subStyle2);
953         elem.TextStyleId = m_rStyleContainer.getStyleId(style2);
954     }
955 
956     elem.applyToChildren(*this);
957 }
958 
959 void DrawXmlFinalizer::visit( ImageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& )
960 {
961 }
962 
963 void DrawXmlFinalizer::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
964 {
965     if( m_rProcessor.getStatusIndicator().is() )
966         m_rProcessor.getStatusIndicator()->setValue( elem.PageNumber );
967 
968     // transform from pixel to mm
969     double page_width = convPx2mm( elem.w ), page_height = convPx2mm( elem.h );
970 
971     // calculate page margins out of the relevant children (paragraphs)
972     elem.TopMargin = elem.h;
973     elem.BottomMargin = 0;
974     elem.LeftMargin = elem.w;
975     elem.RightMargin = 0;
976 
977     for( const auto& rxChild : elem.Children )
978     {
979         if( rxChild->x < elem.LeftMargin )
980             elem.LeftMargin = rxChild->x;
981         if( rxChild->y < elem.TopMargin )
982             elem.TopMargin = rxChild->y;
983         if( rxChild->x + rxChild->w > elem.RightMargin )
984             elem.RightMargin = (rxChild->x + rxChild->w);
985         if( rxChild->y + rxChild->h > elem.BottomMargin )
986             elem.BottomMargin = (rxChild->y + rxChild->h);
987     }
988 
989     // transform margins to mm
990     double left_margin     = convPx2mm( elem.LeftMargin );
991     double right_margin    = convPx2mm( elem.RightMargin );
992     double top_margin      = convPx2mm( elem.TopMargin );
993     double bottom_margin   = convPx2mm( elem.BottomMargin );
994 
995     // round left/top margin to nearest mm
996     left_margin     = rtl_math_round( left_margin, 0, rtl_math_RoundingMode_Floor );
997     top_margin      = rtl_math_round( top_margin, 0, rtl_math_RoundingMode_Floor );
998     // round (fuzzy) right/bottom margin to nearest cm
999     right_margin    = rtl_math_round( right_margin, right_margin >= 10 ? -1 : 0, rtl_math_RoundingMode_Floor );
1000     bottom_margin   = rtl_math_round( bottom_margin, bottom_margin >= 10 ? -1 : 0, rtl_math_RoundingMode_Floor );
1001 
1002     // set reasonable default in case of way too large margins
1003     // e.g. no paragraph case
1004     if( left_margin > page_width/2.0 - 10 )
1005         left_margin = 10;
1006     if( right_margin > page_width/2.0 - 10 )
1007         right_margin = 10;
1008     if( top_margin > page_height/2.0 - 10 )
1009         top_margin = 10;
1010     if( bottom_margin > page_height/2.0 - 10 )
1011         bottom_margin = 10;
1012 
1013     // catch the weird cases
1014     if( left_margin < 0 )
1015         left_margin = 0;
1016     if( right_margin < 0 )
1017         right_margin = 0;
1018     if( top_margin < 0 )
1019         top_margin = 0;
1020     if( bottom_margin < 0 )
1021         bottom_margin = 0;
1022 
1023     // widely differing margins are unlikely to be correct
1024     if( right_margin > left_margin*1.5 )
1025         right_margin = left_margin;
1026 
1027     elem.LeftMargin      = convmm2Px( left_margin );
1028     elem.RightMargin     = convmm2Px( right_margin );
1029     elem.TopMargin       = convmm2Px( top_margin );
1030     elem.BottomMargin    = convmm2Px( bottom_margin );
1031 
1032     // get styles for paragraphs
1033     PropertyMap aPageProps;
1034     PropertyMap aPageLayoutProps;
1035     aPageLayoutProps[ "fo:margin-top" ]     =  unitMMString( top_margin );
1036     aPageLayoutProps[ "fo:margin-bottom" ]  =  unitMMString( bottom_margin );
1037     aPageLayoutProps[ "fo:margin-left" ]    =  unitMMString( left_margin );
1038     aPageLayoutProps[ "fo:margin-right" ]   =  unitMMString( right_margin );
1039     aPageLayoutProps[ "fo:page-width" ]     =  unitMMString( page_width );
1040     aPageLayoutProps[ "fo:page-height" ]    =  unitMMString( page_height );
1041     aPageLayoutProps[ "style:print-orientation" ]= elem.w < elem.h ? OUString("portrait") : OUString("landscape");
1042     aPageLayoutProps[ "style:writing-mode" ]= "lr-tb";
1043 
1044     StyleContainer::Style aStyle( "style:page-layout", aPageProps);
1045     StyleContainer::Style aSubStyle( "style:page-layout-properties", aPageLayoutProps);
1046     aStyle.SubStyles.push_back(&aSubStyle);
1047     sal_Int32 nPageStyle = m_rStyleContainer.impl_getStyleId( aStyle, false );
1048 
1049     // create master page
1050     OUString aMasterPageLayoutName = m_rStyleContainer.getStyleName( nPageStyle );
1051     aPageProps[ "style:page-layout-name" ] = aMasterPageLayoutName;
1052 
1053     StyleContainer::Style aMPStyle( "style:master-page", aPageProps);
1054 
1055     StyleContainer::Style aHeaderStyle( "style:header", PropertyMap() );
1056     StyleContainer::Style aFooterStyle( "style:footer", PropertyMap() );
1057 
1058     elem.StyleId = m_rStyleContainer.impl_getStyleId( aMPStyle,false );
1059 
1060     // create styles for children
1061     elem.applyToChildren(*this);
1062 }
1063 
1064 void DrawXmlFinalizer::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& )
1065 {
1066     elem.applyToChildren(*this);
1067 }
1068 
1069 }
1070 
1071 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
1072