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Diffstat (limited to '')
| -rw-r--r-- | sdext/source/pdfimport/tree/writertreevisiting.cxx | 1299 |
1 files changed, 1299 insertions, 0 deletions
diff --git a/sdext/source/pdfimport/tree/writertreevisiting.cxx b/sdext/source/pdfimport/tree/writertreevisiting.cxx new file mode 100644 index 000000000..52f45ed57 --- /dev/null +++ b/sdext/source/pdfimport/tree/writertreevisiting.cxx @@ -0,0 +1,1299 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . + */ + +#include <sal/config.h> +#include <sal/log.hxx> +#include <string_view> + +#include <pdfiprocessor.hxx> +#include <xmlemitter.hxx> +#include <pdfihelper.hxx> +#include <imagecontainer.hxx> +#include "style.hxx" +#include "writertreevisiting.hxx" +#include <genericelements.hxx> + +#include <basegfx/polygon/b2dpolypolygontools.hxx> +#include <osl/diagnose.h> +#include <com/sun/star/i18n/CharacterClassification.hpp> +#include <com/sun/star/i18n/DirectionProperty.hpp> +#include <comphelper/string.hxx> + +using namespace ::com::sun::star; +using namespace ::com::sun::star::lang; +using namespace ::com::sun::star::i18n; +using namespace ::com::sun::star::uno; + +namespace pdfi +{ + +const Reference< XCharacterClassification >& WriterXmlEmitter::GetCharacterClassification() +{ + if ( !mxCharClass.is() ) + { + Reference< XComponentContext > xContext( m_rEmitContext.m_xContext, uno::UNO_SET_THROW ); + mxCharClass = CharacterClassification::create(xContext); + } + return mxCharClass; +} + +void WriterXmlEmitter::visit( HyperlinkElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( elem.Children.empty() ) + return; + + const char* pType = dynamic_cast<DrawElement*>(elem.Children.front().get()) ? "draw:a" : "text:a"; + + PropertyMap aProps; + aProps[ "xlink:type" ] = "simple"; + aProps[ "xlink:href" ] = elem.URI; + aProps[ "office:target-frame-name" ] = "_blank"; + aProps[ "xlink:show" ] = "new"; + + m_rEmitContext.rEmitter.beginTag( pType, aProps ); + auto this_it = elem.Children.begin(); + while( this_it != elem.Children.end() && this_it->get() != &elem ) + { + (*this_it)->visitedBy( *this, this_it ); + ++this_it; + } + m_rEmitContext.rEmitter.endTag( pType ); +} + +void WriterXmlEmitter::visit( TextElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( elem.Text.isEmpty() ) + return; + + PropertyMap aProps = {}; + const sal_Unicode strSpace = 0x0020; + const sal_Unicode strNbSpace = 0x00A0; + const sal_Unicode tabSpace = 0x0009; + + if( elem.StyleId != -1 ) + { + aProps[ OUString( "text:style-name" ) ] = + m_rEmitContext.rStyles.getStyleName( elem.StyleId ); + } + + OUString str(elem.Text.toString()); + + // Check for RTL + bool isRTL = false; + Reference< i18n::XCharacterClassification > xCC( GetCharacterClassification() ); + if( xCC.is() ) + { + for(int i=1; i< elem.Text.getLength(); i++) + { + i18n::DirectionProperty nType = static_cast<i18n::DirectionProperty>(xCC->getCharacterDirection( str, i )); + if ( nType == i18n::DirectionProperty_RIGHT_TO_LEFT || + nType == i18n::DirectionProperty_RIGHT_TO_LEFT_ARABIC || + nType == i18n::DirectionProperty_RIGHT_TO_LEFT_EMBEDDING || + nType == i18n::DirectionProperty_RIGHT_TO_LEFT_OVERRIDE + ) + isRTL = true; + } + } + + if (isRTL) // If so, reverse string + { + // First, produce mirrored-image for each code point which has the Bidi_Mirrored property. + str = PDFIProcessor::SubstituteBidiMirrored(str); + // Then, reverse the code points in the string, in backward order. + str = ::comphelper::string::reverseCodePoints(str); + } + + m_rEmitContext.rEmitter.beginTag( "text:span", aProps ); + + sal_Unicode strToken; + for (int i = 0; i < elem.Text.getLength(); i++) + { + strToken = str[i]; + if (strToken == strSpace || strToken == strNbSpace) + { + aProps["text:c"] = "1"; + m_rEmitContext.rEmitter.beginTag("text:s", aProps); + m_rEmitContext.rEmitter.endTag("text:s"); + } + else if (strToken == tabSpace) + { + m_rEmitContext.rEmitter.beginTag("text:tab", aProps); + m_rEmitContext.rEmitter.endTag("text:tab"); + } + else + m_rEmitContext.rEmitter.write(OUString(strToken)); + } + + auto this_it = elem.Children.begin(); + while( this_it != elem.Children.end() && this_it->get() != &elem ) + { + (*this_it)->visitedBy( *this, this_it ); + ++this_it; + } + + m_rEmitContext.rEmitter.endTag( "text:span" ); +} + +void WriterXmlEmitter::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + PropertyMap aProps; + if( elem.StyleId != -1 ) + { + aProps[ "text:style-name" ] = m_rEmitContext.rStyles.getStyleName( elem.StyleId ); + } + const char* pTagType = "text:p"; + if( elem.Type == ParagraphElement::Headline ) + pTagType = "text:h"; + m_rEmitContext.rEmitter.beginTag( pTagType, aProps ); + + auto this_it = elem.Children.begin(); + while( this_it != elem.Children.end() && this_it->get() != &elem ) + { + (*this_it)->visitedBy( *this, this_it ); + ++this_it; + } + + m_rEmitContext.rEmitter.endTag( pTagType ); +} + +void WriterXmlEmitter::fillFrameProps( DrawElement& rElem, + PropertyMap& rProps, + const EmitContext& rEmitContext ) +{ + double rel_x = rElem.x, rel_y = rElem.y; + + // find anchor type by recursing though parents + Element* pAnchor = &rElem; + ParagraphElement* pParaElt = nullptr; + PageElement* pPage = nullptr; + while ((pAnchor = pAnchor->Parent)) + { + if ((pParaElt = dynamic_cast<ParagraphElement*>(pAnchor))) + break; + if ((pPage = dynamic_cast<PageElement*>(pAnchor))) + break; + } + if( pAnchor ) + { + if (pParaElt) + { + rProps[ "text:anchor-type" ] = rElem.isCharacter + ? std::u16string_view(u"character") : std::u16string_view(u"paragraph"); + } + else + { + assert(pPage); // guaranteed by the while loop above + rProps[ "text:anchor-type" ] = "page"; + rProps[ "text:anchor-page-number" ] = OUString::number(pPage->PageNumber); + } + rel_x -= pAnchor->x; + rel_y -= pAnchor->y; + } + + rProps[ "draw:z-index" ] = OUString::number( rElem.ZOrder ); + rProps[ "draw:style-name"] = rEmitContext.rStyles.getStyleName( rElem.StyleId ); + rProps[ "svg:width" ] = convertPixelToUnitString( rElem.w ); + rProps[ "svg:height" ] = convertPixelToUnitString( rElem.h ); + + const GraphicsContext& rGC = + rEmitContext.rProcessor.getGraphicsContext( rElem.GCId ); + if( rGC.Transformation.isIdentity() ) + { + if( !rElem.isCharacter ) + { + rProps[ "svg:x" ] = convertPixelToUnitString( rel_x ); + rProps[ "svg:y" ] = convertPixelToUnitString( rel_y ); + } + } + else + { + basegfx::B2DTuple aScale, aTranslation; + double fRotate, fShearX; + + rGC.Transformation.decompose( aScale, aTranslation, fRotate, fShearX ); + + OUStringBuffer aBuf( 256 ); + + // TODO(F2): general transformation case missing; if implemented, note + // that ODF rotation is oriented the other way + + // build transformation string + if (rElem.MirrorVertical) + { + // At some point, rElem.h may start arriving positive, + // so use robust adjusting math + rel_y -= std::abs(rElem.h); + if (!aBuf.isEmpty()) + aBuf.append(' '); + aBuf.append("scale( 1.0 -1.0 )"); + } + if( fShearX != 0.0 ) + { + aBuf.append( "skewX( " ); + aBuf.append( fShearX ); + aBuf.append( " )" ); + } + if( fRotate != 0.0 ) + { + if( !aBuf.isEmpty() ) + aBuf.append( ' ' ); + aBuf.append( "rotate( " ); + aBuf.append( -fRotate ); + aBuf.append( " )" ); + + } + if( ! rElem.isCharacter ) + { + if( !aBuf.isEmpty() ) + aBuf.append( ' ' ); + aBuf.append( "translate( " ); + aBuf.append( convertPixelToUnitString( rel_x ) ); + aBuf.append( ' ' ); + aBuf.append( convertPixelToUnitString( rel_y ) ); + aBuf.append( " )" ); + } + + rProps[ "draw:transform" ] = aBuf.makeStringAndClear(); + } +} + +void WriterXmlEmitter::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( elem.Children.empty() ) + return; + + bool bTextBox = (dynamic_cast<ParagraphElement*>(elem.Children.front().get()) != nullptr); + PropertyMap aFrameProps; + fillFrameProps( elem, aFrameProps, m_rEmitContext ); + m_rEmitContext.rEmitter.beginTag( "draw:frame", aFrameProps ); + if( bTextBox ) + m_rEmitContext.rEmitter.beginTag( "draw:text-box", PropertyMap() ); + + auto this_it = elem.Children.begin(); + while( this_it != elem.Children.end() && this_it->get() != &elem ) + { + (*this_it)->visitedBy( *this, this_it ); + ++this_it; + } + + if( bTextBox ) + m_rEmitContext.rEmitter.endTag( "draw:text-box" ); + m_rEmitContext.rEmitter.endTag( "draw:frame" ); +} + +void WriterXmlEmitter::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + elem.updateGeometry(); + /* note: + * aw recommends using 100dth of mm in all respects since the xml import + * (a) is buggy (see issue 37213) + * (b) is optimized for 100dth of mm and does not scale itself then, + * this does not gain us speed but makes for smaller rounding errors since + * the xml importer coordinates are integer based + */ + for (sal_uInt32 i = 0; i< elem.PolyPoly.count(); i++) + { + basegfx::B2DPolygon b2dPolygon = elem.PolyPoly.getB2DPolygon( i ); + + for ( sal_uInt32 j = 0; j< b2dPolygon.count(); j++ ) + { + basegfx::B2DPoint point; + basegfx::B2DPoint nextPoint; + point = b2dPolygon.getB2DPoint( j ); + + basegfx::B2DPoint prevPoint = b2dPolygon.getPrevControlPoint( j ) ; + + point.setX( convPx2mmPrec2( point.getX() )*100.0 ); + point.setY( convPx2mmPrec2( point.getY() )*100.0 ); + + if ( b2dPolygon.isPrevControlPointUsed( j ) ) + { + prevPoint.setX( convPx2mmPrec2( prevPoint.getX() )*100.0 ); + prevPoint.setY( convPx2mmPrec2( prevPoint.getY() )*100.0 ); + } + + if ( b2dPolygon.isNextControlPointUsed( j ) ) + { + nextPoint = b2dPolygon.getNextControlPoint( j ) ; + nextPoint.setX( convPx2mmPrec2( nextPoint.getX() )*100.0 ); + nextPoint.setY( convPx2mmPrec2( nextPoint.getY() )*100.0 ); + } + + b2dPolygon.setB2DPoint( j, point ); + + if ( b2dPolygon.isPrevControlPointUsed( j ) ) + b2dPolygon.setPrevControlPoint( j , prevPoint ) ; + + if ( b2dPolygon.isNextControlPointUsed( j ) ) + b2dPolygon.setNextControlPoint( j , nextPoint ) ; + } + + elem.PolyPoly.setB2DPolygon( i, b2dPolygon ); + } + + PropertyMap aProps; + fillFrameProps( elem, aProps, m_rEmitContext ); + OUStringBuffer aBuf( 64 ); + aBuf.append( "0 0 " ); + aBuf.append( convPx2mmPrec2(elem.w)*100.0 ); + aBuf.append( ' ' ); + aBuf.append( convPx2mmPrec2(elem.h)*100.0 ); + aProps[ "svg:viewBox" ] = aBuf.makeStringAndClear(); + aProps[ "svg:d" ] = basegfx::utils::exportToSvgD( elem.PolyPoly, true, true, false ); + + m_rEmitContext.rEmitter.beginTag( "draw:path", aProps ); + m_rEmitContext.rEmitter.endTag( "draw:path" ); +} + +void WriterXmlEmitter::visit( ImageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + PropertyMap aImageProps; + m_rEmitContext.rEmitter.beginTag( "draw:image", aImageProps ); + m_rEmitContext.rEmitter.beginTag( "office:binary-data", PropertyMap() ); + m_rEmitContext.rImages.writeBase64EncodedStream( elem.Image, m_rEmitContext); + m_rEmitContext.rEmitter.endTag( "office:binary-data" ); + m_rEmitContext.rEmitter.endTag( "draw:image" ); +} + +void WriterXmlEmitter::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( m_rEmitContext.xStatusIndicator.is() ) + m_rEmitContext.xStatusIndicator->setValue( elem.PageNumber ); + + auto this_it = elem.Children.begin(); + while( this_it != elem.Children.end() && this_it->get() != &elem ) + { + (*this_it)->visitedBy( *this, this_it ); + ++this_it; + } +} + +void WriterXmlEmitter::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&) +{ + m_rEmitContext.rEmitter.beginTag( "office:body", PropertyMap() ); + m_rEmitContext.rEmitter.beginTag( "office:text", PropertyMap() ); + + for( const auto& rxChild : elem.Children ) + { + PageElement* pPage = dynamic_cast<PageElement*>(rxChild.get()); + if( pPage ) + { + // emit only page anchored objects + // currently these are only DrawElement types + for( auto child_it = pPage->Children.begin(); child_it != pPage->Children.end(); ++child_it ) + { + if( dynamic_cast<DrawElement*>(child_it->get()) != nullptr ) + (*child_it)->visitedBy( *this, child_it ); + } + } + } + + // do not emit page anchored objects, they are emitted before + // (must precede all pages in writer document) currently these are + // only DrawElement types + for( auto it = elem.Children.begin(); it != elem.Children.end(); ++it ) + { + if( dynamic_cast<DrawElement*>(it->get()) != nullptr ) + (*it)->visitedBy( *this, it ); + } + + m_rEmitContext.rEmitter.endTag( "office:text" ); + m_rEmitContext.rEmitter.endTag( "office:body" ); +} + + +void WriterXmlOptimizer::visit( HyperlinkElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ +} + +void WriterXmlOptimizer::visit( TextElement&, const std::list< std::unique_ptr<Element> >::const_iterator&) +{ +} + +void WriterXmlOptimizer::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + elem.applyToChildren(*this); +} + +void WriterXmlOptimizer::visit( ImageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ +} + +void WriterXmlOptimizer::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& elemIt ) +{ + /* note: optimize two consecutive PolyPolyElements that + * have the same path but one of which is a stroke while + * the other is a fill + */ + if( !elem.Parent ) + return; + // find following PolyPolyElement in parent's children list + if( elemIt == elem.Parent->Children.end() ) + return; + auto next_it = elemIt; + ++next_it; + if( next_it == elem.Parent->Children.end() ) + return; + + PolyPolyElement* pNext = dynamic_cast<PolyPolyElement*>(next_it->get()); + if( !pNext || pNext->PolyPoly != elem.PolyPoly ) + return; + + const GraphicsContext& rNextGC = + m_rProcessor.getGraphicsContext( pNext->GCId ); + const GraphicsContext& rThisGC = + m_rProcessor.getGraphicsContext( elem.GCId ); + + if( !(rThisGC.BlendMode == rNextGC.BlendMode && + rThisGC.Flatness == rNextGC.Flatness && + rThisGC.Transformation == rNextGC.Transformation && + rThisGC.Clip == rNextGC.Clip && + pNext->Action == PATH_STROKE && + (elem.Action == PATH_FILL || elem.Action == PATH_EOFILL)) ) + return; + + GraphicsContext aGC = rThisGC; + aGC.LineJoin = rNextGC.LineJoin; + aGC.LineCap = rNextGC.LineCap; + aGC.LineWidth = rNextGC.LineWidth; + aGC.MiterLimit= rNextGC.MiterLimit; + aGC.DashArray = rNextGC.DashArray; + aGC.LineColor = rNextGC.LineColor; + elem.GCId = m_rProcessor.getGCId( aGC ); + + elem.Action |= pNext->Action; + + elem.Children.splice( elem.Children.end(), pNext->Children ); + elem.Parent->Children.erase(next_it); +} + +void WriterXmlOptimizer::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt) +{ + optimizeTextElements( elem ); + + elem.applyToChildren(*this); + + if( !(elem.Parent && rParentIt != elem.Parent->Children.end()) ) + return; + + // find if there is a previous paragraph that might be a heading for this one + auto prev = rParentIt; + ParagraphElement* pPrevPara = nullptr; + while( prev != elem.Parent->Children.begin() ) + { + --prev; + pPrevPara = dynamic_cast< ParagraphElement* >(prev->get()); + if( pPrevPara ) + { + /* What constitutes a heading ? current hints are: + * - one line only + * - not too far away from this paragraph (two heading height max ?) + * - font larger or bold + * this is of course incomplete + * FIXME: improve hints for heading + */ + // check for single line + if( pPrevPara->isSingleLined( m_rProcessor ) ) + { + double head_line_height = pPrevPara->getLineHeight( m_rProcessor ); + if( pPrevPara->y + pPrevPara->h + 2*head_line_height > elem.y ) + { + // check for larger font + if( head_line_height > elem.getLineHeight( m_rProcessor ) ) + { + pPrevPara->Type = ParagraphElement::Headline; + } + else + { + // check whether text of pPrevPara is bold (at least first text element) + // and this para is not bold (ditto) + TextElement* pPrevText = pPrevPara->getFirstTextChild(); + TextElement* pThisText = elem.getFirstTextChild(); + if( pPrevText && pThisText ) + { + const FontAttributes& rPrevFont = m_rProcessor.getFont( pPrevText->FontId ); + const FontAttributes& rThisFont = m_rProcessor.getFont( pThisText->FontId ); + if ( (rPrevFont.fontWeight == u"600" || + rPrevFont.fontWeight == u"bold" || + rPrevFont.fontWeight == u"800" || + rPrevFont.fontWeight == u"900" ) && + (rThisFont.fontWeight == u"600" || + rThisFont.fontWeight == u"bold" || + rThisFont.fontWeight == u"800" || + rThisFont.fontWeight == u"900" ) ) + { + pPrevPara->Type = ParagraphElement::Headline; + } + } + } + } + } + break; + } + } +} + +void WriterXmlOptimizer::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( m_rProcessor.getStatusIndicator().is() ) + m_rProcessor.getStatusIndicator()->setValue( elem.PageNumber ); + + // resolve hyperlinks + elem.resolveHyperlinks(); + + elem.resolveFontStyles( m_rProcessor ); // underlines and such + + // FIXME: until hyperlinks and font effects are adjusted for + // geometrical search handle them before sorting + PDFIProcessor::sortElements( &elem ); + + // find paragraphs in text + ParagraphElement* pCurPara = nullptr; + std::list< std::unique_ptr<Element> >::iterator page_element, next_page_element; + next_page_element = elem.Children.begin(); + double fCurLineHeight = 0.0; // average height of text items in current para + int nCurLineElements = 0; // number of line contributing elements in current para + double line_left = elem.w, line_right = 0.0; + double column_width = elem.w*0.75; // estimate text width + // TODO: guess columns + while( next_page_element != elem.Children.end() ) + { + page_element = next_page_element++; + ParagraphElement* pPagePara = dynamic_cast<ParagraphElement*>(page_element->get()); + if( pPagePara ) + { + pCurPara = pPagePara; + // adjust line height and text items + fCurLineHeight = 0.0; + nCurLineElements = 0; + for( const auto& rxChild : pCurPara->Children ) + { + TextElement* pTestText = dynamic_cast<TextElement*>(rxChild.get()); + if( pTestText ) + { + fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pTestText->h)/double(nCurLineElements+1); + nCurLineElements++; + } + } + continue; + } + + HyperlinkElement* pLink = dynamic_cast<HyperlinkElement*>(page_element->get()); + DrawElement* pDraw = dynamic_cast<DrawElement*>(page_element->get()); + if( ! pDraw && pLink && ! pLink->Children.empty() ) + pDraw = dynamic_cast<DrawElement*>(pLink->Children.front().get() ); + if( pDraw ) + { + // insert small drawing objects as character, else leave them page bound + + bool bInsertToParagraph = false; + // first check if this is either inside the paragraph + if( pCurPara && pDraw->y < pCurPara->y + pCurPara->h ) + { + if( pDraw->h < fCurLineHeight * 1.5 ) + { + bInsertToParagraph = true; + fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pDraw->h)/double(nCurLineElements+1); + nCurLineElements++; + // mark draw element as character + pDraw->isCharacter = true; + } + } + // or perhaps the draw element begins a new paragraph + else if( next_page_element != elem.Children.end() ) + { + TextElement* pText = dynamic_cast<TextElement*>(next_page_element->get()); + if( ! pText ) + { + ParagraphElement* pPara = dynamic_cast<ParagraphElement*>(next_page_element->get()); + if( pPara && ! pPara->Children.empty() ) + pText = dynamic_cast<TextElement*>(pPara->Children.front().get()); + } + if( pText && // check there is a text + pDraw->h < pText->h*1.5 && // and it is approx the same height + // and either upper or lower edge of pDraw is inside text's vertical range + ( ( pDraw->y >= pText->y && pDraw->y <= pText->y+pText->h ) || + ( pDraw->y+pDraw->h >= pText->y && pDraw->y+pDraw->h <= pText->y+pText->h ) + ) + ) + { + bInsertToParagraph = true; + fCurLineHeight = pDraw->h; + nCurLineElements = 1; + line_left = pDraw->x; + line_right = pDraw->x + pDraw->w; + // begin a new paragraph + pCurPara = nullptr; + // mark draw element as character + pDraw->isCharacter = true; + } + } + + if( ! bInsertToParagraph ) + { + pCurPara = nullptr; + continue; + } + } + + TextElement* pText = dynamic_cast<TextElement*>(page_element->get()); + if( ! pText && pLink && ! pLink->Children.empty() ) + pText = dynamic_cast<TextElement*>(pLink->Children.front().get()); + if( pText ) + { + Element* pGeo = pLink ? static_cast<Element*>(pLink) : + static_cast<Element*>(pText); + if( pCurPara ) + { + // there was already a text element, check for a new paragraph + if( nCurLineElements > 0 ) + { + // if the new text is significantly distant from the paragraph + // begin a new paragraph + if( pGeo->y > pCurPara->y+pCurPara->h + fCurLineHeight*0.5 ) + pCurPara = nullptr; // insert new paragraph + else if( pGeo->y > (pCurPara->y+pCurPara->h - fCurLineHeight*0.05) ) + { + // new paragraph if either the last line of the paragraph + // was significantly shorter than the paragraph as a whole + if( (line_right - line_left) < pCurPara->w*0.75 ) + pCurPara = nullptr; + // or the last line was significantly smaller than the column width + else if( (line_right - line_left) < column_width*0.75 ) + pCurPara = nullptr; + } + } + } + // update line height/width + if( pCurPara ) + { + fCurLineHeight = (fCurLineHeight*double(nCurLineElements) + pGeo->h)/double(nCurLineElements+1); + nCurLineElements++; + if( pGeo->x < line_left ) + line_left = pGeo->x; + if( pGeo->x+pGeo->w > line_right ) + line_right = pGeo->x+pGeo->w; + } + else + { + fCurLineHeight = pGeo->h; + nCurLineElements = 1; + line_left = pGeo->x; + line_right = pGeo->x + pGeo->w; + } + } + + // move element to current paragraph + if( ! pCurPara ) // new paragraph, insert one + { + pCurPara = ElementFactory::createParagraphElement( nullptr ); + // set parent + pCurPara->Parent = &elem; + //insert new paragraph before current element + page_element = elem.Children.insert( page_element, std::unique_ptr<Element>(pCurPara) ); + // forward iterator to current element again + ++ page_element; + // update next_element which is now invalid + next_page_element = page_element; + ++ next_page_element; + } + Element* pCurEle = page_element->get(); + Element::setParent( page_element, pCurPara ); + OSL_ENSURE( !pText || pCurEle == pText || pCurEle == pLink, "paragraph child list in disorder" ); + if( pText || pDraw ) + pCurPara->updateGeometryWith( pCurEle ); + } + + // process children + elem.applyToChildren(*this); + + // find possible header and footer + checkHeaderAndFooter( elem ); +} + +void WriterXmlOptimizer::checkHeaderAndFooter( PageElement& rElem ) +{ + /* indicators for a header: + * - single line paragraph at top of page (inside 15% page height) + * - at least lineheight above the next paragraph + * + * indicators for a footer likewise: + * - single line paragraph at bottom of page (inside 15% page height) + * - at least lineheight below the previous paragraph + */ + + auto isParagraphElement = [](std::unique_ptr<Element>& rxChild) -> bool { + return dynamic_cast<ParagraphElement*>(rxChild.get()) != nullptr; + }; + + // detect header + // Note: the following assumes that the pages' children have been + // sorted geometrically + auto it = std::find_if(rElem.Children.begin(), rElem.Children.end(), isParagraphElement); + if (it != rElem.Children.end()) + { + ParagraphElement& rPara = dynamic_cast<ParagraphElement&>(**it); + if( rPara.y+rPara.h < rElem.h*0.15 && rPara.isSingleLined( m_rProcessor ) ) + { + auto next_it = it; + ParagraphElement* pNextPara = nullptr; + while( ++next_it != rElem.Children.end() && pNextPara == nullptr ) + { + pNextPara = dynamic_cast<ParagraphElement*>(next_it->get()); + } + if( pNextPara && pNextPara->y > rPara.y+rPara.h*2 ) + { + rElem.HeaderElement = std::move(*it); + rPara.Parent = nullptr; + rElem.Children.erase( it ); + } + } + } + + // detect footer + auto rit = std::find_if(rElem.Children.rbegin(), rElem.Children.rend(), isParagraphElement); + if (rit == rElem.Children.rend()) + return; + + ParagraphElement& rPara = dynamic_cast<ParagraphElement&>(**rit); + if( !(rPara.y > rElem.h*0.85 && rPara.isSingleLined( m_rProcessor )) ) + return; + + std::list< std::unique_ptr<Element> >::reverse_iterator next_it = rit; + ParagraphElement* pNextPara = nullptr; + while( ++next_it != rElem.Children.rend() && pNextPara == nullptr ) + { + pNextPara = dynamic_cast<ParagraphElement*>(next_it->get()); + } + if( pNextPara && pNextPara->y < rPara.y-rPara.h*2 ) + { + rElem.FooterElement = std::move(*rit); + rPara.Parent = nullptr; + rElem.Children.erase( std::next(rit).base() ); + } +} + +void WriterXmlOptimizer::optimizeTextElements(Element& rParent) +{ + if( rParent.Children.empty() ) // this should not happen + { + OSL_FAIL( "empty paragraph optimized" ); + return; + } + + // concatenate child elements with same font id + auto next = rParent.Children.begin(); + auto it = next++; + FrameElement* pFrame = dynamic_cast<FrameElement*>(rParent.Parent); + bool bRotatedFrame = false; + if( pFrame ) + { + const GraphicsContext& rFrameGC = m_rProcessor.getGraphicsContext( pFrame->GCId ); + if( rFrameGC.isRotatedOrSkewed() ) + bRotatedFrame = true; + } + while( next != rParent.Children.end() ) + { + bool bConcat = false; + TextElement* pCur = dynamic_cast<TextElement*>(it->get()); + if( pCur ) + { + TextElement* pNext = dynamic_cast<TextElement*>(next->get()); + if( pNext ) + { + const GraphicsContext& rCurGC = m_rProcessor.getGraphicsContext( pCur->GCId ); + const GraphicsContext& rNextGC = m_rProcessor.getGraphicsContext( pNext->GCId ); + + // line and space optimization; works only in strictly horizontal mode + + if( !bRotatedFrame + && ! rCurGC.isRotatedOrSkewed() + && ! rNextGC.isRotatedOrSkewed() + && ! pNext->Text.isEmpty() + && pNext->Text[0] != ' ' + && ! pCur->Text.isEmpty() + && pCur->Text[pCur->Text.getLength() - 1] != ' ' + ) + { + // check for new line in paragraph + if( pNext->y > pCur->y+pCur->h ) + { + // new line begins + // check whether a space would should be inserted or a hyphen removed + sal_Unicode aLastCode = pCur->Text[pCur->Text.getLength() - 1]; + if( aLastCode == '-' + || aLastCode == 0x2010 + || (aLastCode >= 0x2012 && aLastCode <= 0x2015) + || aLastCode == 0xff0d + ) + { + // cut a hyphen + pCur->Text.setLength( pCur->Text.getLength()-1 ); + } + // append a space unless there is a non breaking hyphen + else if( aLastCode != 0x2011 ) + { + pCur->Text.append( ' ' ); + } + } + else // we're continuing the same line + { + // check whether a space would should be inserted + // check for a small horizontal offset + if( pCur->x + pCur->w + pNext->h*0.15 < pNext->x ) + { + pCur->Text.append( ' ' ); + } + } + } + // concatenate consecutive text elements unless there is a + // font or text color change, leave a new span in that case + if( pCur->FontId == pNext->FontId && + rCurGC.FillColor.Red == rNextGC.FillColor.Red && + rCurGC.FillColor.Green == rNextGC.FillColor.Green && + rCurGC.FillColor.Blue == rNextGC.FillColor.Blue && + rCurGC.FillColor.Alpha == rNextGC.FillColor.Alpha + ) + { + pCur->updateGeometryWith( pNext ); + // append text to current element + pCur->Text.append( pNext->Text ); + // append eventual children to current element + // and clear children (else the children just + // appended to pCur would be destroyed) + pCur->Children.splice( pCur->Children.end(), pNext->Children ); + // get rid of the now useless element + rParent.Children.erase( next ); + bConcat = true; + } + } + } + else if( dynamic_cast<HyperlinkElement*>(it->get()) ) + optimizeTextElements( **it ); + if( bConcat ) + { + next = it; + ++next; + } + else + { + ++it; + ++next; + } + } +} + +void WriterXmlOptimizer::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&) +{ + elem.applyToChildren(*this); +} + + +void WriterXmlFinalizer::visit( PolyPolyElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + // xxx TODO copied from DrawElement + const GraphicsContext& rGC = m_rProcessor.getGraphicsContext(elem.GCId ); + PropertyMap aProps; + aProps[ "style:family" ] = "graphic"; + + PropertyMap aGCProps; + if (elem.Action & PATH_STROKE) + { + double scale = GetAverageTransformationScale(rGC.Transformation); + if (rGC.DashArray.size() < 2) + { + aGCProps[ "draw:stroke" ] = "solid"; + } + else + { + PropertyMap props; + FillDashStyleProps(props, rGC.DashArray, scale); + StyleContainer::Style style("draw:stroke-dash", std::move(props)); + + aGCProps[ "draw:stroke" ] = "dash"; + aGCProps[ "draw:stroke-dash" ] = + m_rStyleContainer.getStyleName( + m_rStyleContainer.getStyleId(style)); + } + + aGCProps[ "svg:stroke-color" ] = getColorString(rGC.LineColor); + aGCProps[ "svg:stroke-width" ] = convertPixelToUnitString(rGC.LineWidth * scale); + aGCProps[ "draw:stroke-linejoin" ] = rGC.GetLineJoinString(); + aGCProps[ "svg:stroke-linecap" ] = rGC.GetLineCapString(); + } + else + { + aGCProps[ "draw:stroke" ] = "none"; + } + + // TODO(F1): check whether stuff could be emulated by gradient/bitmap/hatch + if( elem.Action & (PATH_FILL | PATH_EOFILL) ) + { + aGCProps[ "draw:fill" ] = "solid"; + aGCProps[ "draw:fill-color" ] = getColorString( rGC.FillColor ); + } + else + { + aGCProps[ "draw:fill" ] = "none"; + } + + StyleContainer::Style aStyle( "style:style", std::move(aProps) ); + StyleContainer::Style aSubStyle( "style:graphic-properties", std::move(aGCProps) ); + aStyle.SubStyles.push_back( &aSubStyle ); + + elem.StyleId = m_rStyleContainer.getStyleId( aStyle ); +} + +void WriterXmlFinalizer::visit( HyperlinkElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ +} + +void WriterXmlFinalizer::visit( TextElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + const FontAttributes& rFont = m_rProcessor.getFont( elem.FontId ); + PropertyMap aProps; + aProps[ "style:family" ] = "text"; + + PropertyMap aFontProps; + + // family name + // TODO: tdf#143095: use system font name rather than PSName + SAL_INFO("sdext.pdfimport", "The font used in xml is: " << rFont.familyName); + aFontProps[ "fo:font-family" ] = rFont.familyName; + aFontProps[ "style:font-family-asian" ] = rFont.familyName; + aFontProps[ "style:font-family-complex" ] = rFont.familyName; + + // bold + aFontProps[ "fo:font-weight" ] = rFont.fontWeight; + aFontProps[ "style:font-weight-asian" ] = rFont.fontWeight; + aFontProps[ "style:font-weight-complex" ] = rFont.fontWeight; + + // italic + if( rFont.isItalic ) + { + aFontProps[ "fo:font-style" ] = "italic"; + aFontProps[ "style:font-style-asian" ] = "italic"; + aFontProps[ "style:font-style-complex" ] = "italic"; + } + + // underline + if( rFont.isUnderline ) + { + aFontProps[ "style:text-underline-style" ] = "solid"; + aFontProps[ "style:text-underline-width" ] = "auto"; + aFontProps[ "style:text-underline-color" ] = "font-color"; + } + + // outline + if( rFont.isOutline ) + aFontProps[ "style:text-outline" ] = "true"; + + // size + OUString aFSize = OUString::number( rFont.size*72/PDFI_OUTDEV_RESOLUTION ) + "pt"; + aFontProps[ "fo:font-size" ] = aFSize; + aFontProps[ "style:font-size-asian" ] = aFSize; + aFontProps[ "style:font-size-complex" ] = aFSize; + + // color + const GraphicsContext& rGC = m_rProcessor.getGraphicsContext( elem.GCId ); + aFontProps[ "fo:color" ] = getColorString( rFont.isOutline ? rGC.LineColor : rGC.FillColor ); + + StyleContainer::Style aStyle( "style:style", std::move(aProps) ); + StyleContainer::Style aSubStyle( "style:text-properties", std::move(aFontProps) ); + aStyle.SubStyles.push_back( &aSubStyle ); + elem.StyleId = m_rStyleContainer.getStyleId( aStyle ); +} + +void WriterXmlFinalizer::visit( ParagraphElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt ) +{ + PropertyMap aParaProps; + + if( elem.Parent ) + { + // check for center alignment + // criterion: paragraph is small relative to parent and distributed around its center + double p_x = elem.Parent->x; + double p_w = elem.Parent->w; + + PageElement* pPage = dynamic_cast<PageElement*>(elem.Parent); + if( pPage ) + { + p_x += pPage->LeftMargin; + p_w -= pPage->LeftMargin+pPage->RightMargin; + } + bool bIsCenter = false; + if( elem.w < ( p_w/2) ) + { + double delta = elem.w/4; + // allow very small paragraphs to deviate a little more + // relative to parent's center + if( elem.w < p_w/8 ) + delta = elem.w; + if( fabs( elem.x+elem.w/2 - ( p_x+ p_w/2) ) < delta || + (pPage && fabs( elem.x+elem.w/2 - (pPage->x + pPage->w/2) ) < delta) ) + { + bIsCenter = true; + aParaProps[ "fo:text-align" ] = "center"; + } + } + if( ! bIsCenter && elem.x > p_x + p_w/10 ) + { + // indent + OUStringBuffer aBuf( 32 ); + aBuf.append( convPx2mm( elem.x - p_x ) ); + aBuf.append( "mm" ); + aParaProps[ "fo:margin-left" ] = aBuf.makeStringAndClear(); + } + + // check whether to leave some space to next paragraph + // find whether there is a next paragraph + auto it = rParentIt; + const ParagraphElement* pNextPara = nullptr; + while( ++it != elem.Parent->Children.end() && ! pNextPara ) + pNextPara = dynamic_cast< const ParagraphElement* >(it->get()); + if( pNextPara ) + { + if( pNextPara->y - (elem.y+elem.h) > convmm2Px( 10 ) ) + { + OUStringBuffer aBuf( 32 ); + aBuf.append( convPx2mm( pNextPara->y - (elem.y+elem.h) ) ); + aBuf.append( "mm" ); + aParaProps[ "fo:margin-bottom" ] = aBuf.makeStringAndClear(); + } + } + } + + if( ! aParaProps.empty() ) + { + PropertyMap aProps; + aProps[ "style:family" ] = "paragraph"; + StyleContainer::Style aStyle( "style:style", std::move(aProps) ); + StyleContainer::Style aSubStyle( "style:paragraph-properties", std::move(aParaProps) ); + aStyle.SubStyles.push_back( &aSubStyle ); + elem.StyleId = m_rStyleContainer.getStyleId( aStyle ); + } + + elem.applyToChildren(*this); +} + +void WriterXmlFinalizer::visit( FrameElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator&) +{ + PropertyMap aProps; + aProps[ "style:family" ] = "graphic"; + + PropertyMap aGCProps; + + aGCProps[ "draw:stroke" ] = "none"; + aGCProps[ "draw:fill" ] = "none"; + aGCProps[ "draw:auto-grow-height" ] = "true"; + aGCProps[ "draw:auto-grow-width" ] = "true"; + aGCProps[ "draw:textarea-horizontal-align" ] = "left"; + aGCProps[ "draw:textarea-vertical-align" ] = "top"; + aGCProps[ "fo:min-height"] = "0cm"; + aGCProps[ "fo:min-width"] = "0cm"; + aGCProps[ "fo:padding-top" ] = "0cm"; + aGCProps[ "fo:padding-left" ] = "0cm"; + aGCProps[ "fo:padding-right" ] = "0cm"; + aGCProps[ "fo:padding-bottom" ] = "0cm"; + + StyleContainer::Style aStyle( "style:style", std::move(aProps) ); + StyleContainer::Style aSubStyle( "style:graphic-properties", std::move(aGCProps) ); + aStyle.SubStyles.push_back( &aSubStyle ); + + elem.StyleId = m_rStyleContainer.getStyleId( aStyle ); + elem.applyToChildren(*this); +} + +void WriterXmlFinalizer::visit( ImageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ +} + +void WriterXmlFinalizer::setFirstOnPage( ParagraphElement& rElem, + StyleContainer& rStyles, + const OUString& rMasterPageName ) +{ + PropertyMap aProps; + if( rElem.StyleId != -1 ) + { + const PropertyMap* pProps = rStyles.getProperties( rElem.StyleId ); + if( pProps ) + aProps = *pProps; + } + + aProps[ "style:family" ] = "paragraph"; + aProps[ "style:master-page-name" ] = rMasterPageName; + + if( rElem.StyleId != -1 ) + rElem.StyleId = rStyles.setProperties( rElem.StyleId, std::move(aProps) ); + else + { + StyleContainer::Style aStyle( "style:style", std::move(aProps) ); + rElem.StyleId = rStyles.getStyleId( aStyle ); + } +} + +void WriterXmlFinalizer::visit( PageElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + if( m_rProcessor.getStatusIndicator().is() ) + m_rProcessor.getStatusIndicator()->setValue( elem.PageNumber ); + + // transform from pixel to mm + double page_width = convPx2mm( elem.w ), page_height = convPx2mm( elem.h ); + + // calculate page margins out of the relevant children (paragraphs) + elem.TopMargin = elem.h; + elem.BottomMargin = 0; + elem.LeftMargin = elem.w; + elem.RightMargin = 0; + // first element should be a paragraph + ParagraphElement* pFirstPara = nullptr; + for( const auto& rxChild : elem.Children ) + { + if( dynamic_cast<ParagraphElement*>( rxChild.get() ) ) + { + if( rxChild->x < elem.LeftMargin ) + elem.LeftMargin = rxChild->x; + if( rxChild->y < elem.TopMargin ) + elem.TopMargin = rxChild->y; + if( rxChild->x + rxChild->w > elem.w - elem.RightMargin ) + elem.RightMargin = elem.w - (rxChild->x + rxChild->w); + if( rxChild->y + rxChild->h > elem.h - elem.BottomMargin ) + elem.BottomMargin = elem.h - (rxChild->y + rxChild->h); + if( ! pFirstPara ) + pFirstPara = dynamic_cast<ParagraphElement*>( rxChild.get() ); + } + } + if( elem.HeaderElement && elem.HeaderElement->y < elem.TopMargin ) + elem.TopMargin = elem.HeaderElement->y; + if( elem.FooterElement && elem.FooterElement->y+elem.FooterElement->h > elem.h - elem.BottomMargin ) + elem.BottomMargin = elem.h - (elem.FooterElement->y + elem.FooterElement->h); + + // transform margins to mm + double left_margin = convPx2mm( elem.LeftMargin ); + double right_margin = convPx2mm( elem.RightMargin ); + double top_margin = convPx2mm( elem.TopMargin ); + double bottom_margin = convPx2mm( elem.BottomMargin ); + if( ! pFirstPara ) + { + // use default page margins + left_margin = 10; + right_margin = 10; + top_margin = 10; + bottom_margin = 10; + } + + // round left/top margin to nearest mm + left_margin = rtl_math_round( left_margin, 0, rtl_math_RoundingMode_Floor ); + top_margin = rtl_math_round( top_margin, 0, rtl_math_RoundingMode_Floor ); + // round (fuzzy) right/bottom margin to nearest cm + right_margin = rtl_math_round( right_margin, right_margin >= 10 ? -1 : 0, rtl_math_RoundingMode_Floor ); + bottom_margin = rtl_math_round( bottom_margin, bottom_margin >= 10 ? -1 : 0, rtl_math_RoundingMode_Floor ); + + // set reasonable default in case of way too large margins + // e.g. no paragraph case + if( left_margin > page_width/2.0 - 10 ) + left_margin = 10; + if( right_margin > page_width/2.0 - 10 ) + right_margin = 10; + if( top_margin > page_height/2.0 - 10 ) + top_margin = 10; + if( bottom_margin > page_height/2.0 - 10 ) + bottom_margin = 10; + + // catch the weird cases + if( left_margin < 0 ) + left_margin = 0; + if( right_margin < 0 ) + right_margin = 0; + if( top_margin < 0 ) + top_margin = 0; + if( bottom_margin < 0 ) + bottom_margin = 0; + + // widely differing margins are unlikely to be correct + if( right_margin > left_margin*1.5 ) + right_margin = left_margin; + + elem.LeftMargin = convmm2Px( left_margin ); + elem.RightMargin = convmm2Px( right_margin ); + elem.TopMargin = convmm2Px( top_margin ); + elem.BottomMargin = convmm2Px( bottom_margin ); + + // get styles for paragraphs + PropertyMap aPageProps; + PropertyMap aPageLayoutProps; + aPageLayoutProps[ "fo:page-width" ] = unitMMString( page_width ); + aPageLayoutProps[ "fo:page-height" ] = unitMMString( page_height ); + aPageLayoutProps[ "style:print-orientation" ] + = elem.w < elem.h ? std::u16string_view(u"portrait") : std::u16string_view(u"landscape"); + aPageLayoutProps[ "fo:margin-top" ] = unitMMString( top_margin ); + aPageLayoutProps[ "fo:margin-bottom" ] = unitMMString( bottom_margin ); + aPageLayoutProps[ "fo:margin-left" ] = unitMMString( left_margin ); + aPageLayoutProps[ "fo:margin-right" ] = unitMMString( right_margin ); + aPageLayoutProps[ "style:writing-mode" ]= "lr-tb"; + + StyleContainer::Style aStyle( "style:page-layout", std::move(aPageProps)); + StyleContainer::Style aSubStyle( "style:page-layout-properties", std::move(aPageLayoutProps)); + aStyle.SubStyles.push_back(&aSubStyle); + sal_Int32 nPageStyle = m_rStyleContainer.impl_getStyleId( aStyle, false ); + + // create master page + OUString aMasterPageLayoutName = m_rStyleContainer.getStyleName( nPageStyle ); + aPageProps[ "style:page-layout-name" ] = aMasterPageLayoutName; + StyleContainer::Style aMPStyle( "style:master-page", std::move(aPageProps) ); + StyleContainer::Style aHeaderStyle( "style:header", PropertyMap() ); + StyleContainer::Style aFooterStyle( "style:footer", PropertyMap() ); + if( elem.HeaderElement ) + { + elem.HeaderElement->visitedBy( *this, std::list<std::unique_ptr<Element>>::iterator() ); + aHeaderStyle.ContainedElement = elem.HeaderElement.get(); + aMPStyle.SubStyles.push_back( &aHeaderStyle ); + } + if( elem.FooterElement ) + { + elem.FooterElement->visitedBy( *this, std::list<std::unique_ptr<Element>>::iterator() ); + aFooterStyle.ContainedElement = elem.FooterElement.get(); + aMPStyle.SubStyles.push_back( &aFooterStyle ); + } + elem.StyleId = m_rStyleContainer.impl_getStyleId( aMPStyle,false ); + + + OUString aMasterPageName = m_rStyleContainer.getStyleName( elem.StyleId ); + + // create styles for children + elem.applyToChildren(*this); + + // no paragraph or other elements before the first paragraph + if( ! pFirstPara ) + { + pFirstPara = ElementFactory::createParagraphElement( nullptr ); + pFirstPara->Parent = &elem; + elem.Children.push_front( std::unique_ptr<Element>(pFirstPara) ); + } + setFirstOnPage(*pFirstPara, m_rStyleContainer, aMasterPageName); +} + +void WriterXmlFinalizer::visit( DocumentElement& elem, const std::list< std::unique_ptr<Element> >::const_iterator& ) +{ + elem.applyToChildren(*this); +} + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |