Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 309 insertions, 0 deletions

diff --git a/sdext/source/pdfimport/inc/genericelements.hxx b/sdext/source/pdfimport/inc/genericelements.hxx
new file mode 100644
index 000000000..63325213f
--- /dev/null
+++ b/sdext/source/pdfimport/inc/genericelements.hxx
@@ -0,0 +1,309 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_GENERICELEMENTS_HXX
+#define INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_GENERICELEMENTS_HXX
+
+#include "pdfihelper.hxx"
+#include "treevisiting.hxx"
+
+#include <com/sun/star/task/XStatusIndicator.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/ustrbuf.hxx>
+
+#include <list>
+
+namespace pdfi
+{
+    class XmlEmitter;
+    class StyleContainer;
+    class ImageContainer;
+    class PDFIProcessor;
+    class ElementFactory;
+
+
+    struct EmitContext
+    {
+        EmitContext(
+            XmlEmitter&                              _rEmitter,
+            StyleContainer&                          _rStyles,
+            ImageContainer&                          _rImages,
+            PDFIProcessor&                           _rProcessor,
+            const css::uno::Reference<
+            css::task::XStatusIndicator>& _xStatusIndicator,
+            css::uno::Reference< css::uno::XComponentContext > const & xContext)
+        :
+            rEmitter(_rEmitter),
+            rStyles(_rStyles),
+            rImages(_rImages),
+            rProcessor(_rProcessor),
+            xStatusIndicator(_xStatusIndicator),
+        m_xContext(xContext)
+        {}
+
+        XmlEmitter&     rEmitter;
+        StyleContainer& rStyles;
+        ImageContainer& rImages;
+        PDFIProcessor&  rProcessor;
+        css::uno::Reference<
+            css::task::XStatusIndicator> xStatusIndicator;
+        css::uno::Reference<
+            css::uno::XComponentContext >  m_xContext;
+    };
+
+    struct Element
+    {
+    protected:
+        explicit Element( Element* pParent )
+            : x( 0 ), y( 0 ), w( 0 ), h( 0 ), StyleId( -1 ), Parent( pParent )
+        {
+            if( pParent )
+                pParent->Children.emplace_back( this );
+        }
+
+    public:
+        virtual ~Element();
+
+        /**
+            To be implemented by every tree node that needs to be
+            visitable.
+         */
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt ) = 0;
+        /// Apply visitor to all children
+        void applyToChildren( ElementTreeVisitor& );
+        /// Union element geometry with given element
+        void updateGeometryWith( const Element* pMergeFrom );
+
+#if OSL_DEBUG_LEVEL > 0
+        // xxx refact TODO: move code to visitor
+        virtual void emitStructure( int nLevel );
+#endif
+        /** el must be a valid dereferenceable iterator of el->Parent->Children
+            pNewParent must not be NULL
+        */
+        static void setParent( std::list<std::unique_ptr<Element>>::iterator const & el, Element* pNewParent );
+
+        double              x, y, w, h;
+        sal_Int32           StyleId;
+        Element*            Parent;
+        std::list<std::unique_ptr<Element>> Children;
+    };
+
+    struct ListElement final : public Element
+    {
+        ListElement() : Element( nullptr ) {}
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+    };
+
+    struct HyperlinkElement final : public Element
+    {
+        friend class ElementFactory;
+        HyperlinkElement( Element* pParent, const OUString& rURI )
+        : Element( pParent ), URI( rURI ) {}
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+
+        OUString URI;
+    };
+
+    struct GraphicalElement : public Element
+    {
+    protected:
+        GraphicalElement(Element* pParent, sal_Int32 nGCId)
+            : Element(pParent)
+            , GCId(nGCId)
+            , MirrorVertical(false)
+            , IsForText(false)
+            , FontSize(0.0)
+            , TextStyleId(0)
+        {
+        }
+
+    public:
+        sal_Int32 GCId;
+        bool      MirrorVertical;
+        bool      IsForText;
+        double    FontSize;
+        sal_Int32 TextStyleId;
+    };
+
+    struct DrawElement : public GraphicalElement
+    {
+    protected:
+        DrawElement( Element* pParent, sal_Int32 nGCId )
+        : GraphicalElement( pParent, nGCId ), isCharacter(false), ZOrder(0) {}
+
+    public:
+        bool      isCharacter;
+        sal_Int32 ZOrder;
+    };
+
+    struct FrameElement final : public DrawElement
+    {
+        friend class ElementFactory;
+        FrameElement( Element* pParent, sal_Int32 nGCId )
+        : DrawElement( pParent, nGCId ) {}
+
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+    };
+
+    struct TextElement final : public GraphicalElement
+    {
+        friend class ElementFactory;
+        TextElement( Element* pParent, sal_Int32 nGCId, sal_Int32 nFontId )
+        : GraphicalElement( pParent, nGCId ), FontId( nFontId ) {}
+
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+
+        OUStringBuffer Text;
+        sal_Int32           FontId;
+    };
+
+    struct ParagraphElement final : public Element
+    {
+        friend class ElementFactory;
+        explicit ParagraphElement( Element* pParent ) : Element( pParent ), Type( Normal ), bRtl( false ) {}
+
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt ) override;
+
+        // returns true only if only a single line is contained
+        bool isSingleLined( PDFIProcessor const & rProc ) const;
+        // returns the highest line height of the contained textelements
+        // line height is font height if the text element is itself multilined
+        double getLineHeight( PDFIProcessor& rProc ) const;
+        // returns the first text element child; does not recurse through subparagraphs
+        TextElement* getFirstTextChild() const;
+
+        enum ParagraphType { Normal, Headline };
+        ParagraphType       Type;
+    bool bRtl;
+    };
+
+    struct PolyPolyElement final : public DrawElement
+    {
+        friend class ElementFactory;
+        PolyPolyElement( Element* pParent, sal_Int32 nGCId,
+                         const basegfx::B2DPolyPolygon& rPolyPoly,
+                         sal_Int8 nAction );
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt ) override;
+
+        void updateGeometry();
+
+#if OSL_DEBUG_LEVEL > 0
+        virtual void emitStructure( int nLevel ) override;
+#endif
+
+        basegfx::B2DPolyPolygon PolyPoly;
+        sal_Int8                Action;
+    };
+
+    struct ImageElement final : public DrawElement
+    {
+        friend class ElementFactory;
+        ImageElement( Element* pParent, sal_Int32 nGCId, ImageId nImage )
+        : DrawElement( pParent, nGCId ), Image( nImage ) {}
+
+    public:
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+
+        ImageId Image;
+    };
+
+    struct PageElement final : public Element
+    {
+        friend class ElementFactory;
+        PageElement( Element* pParent, sal_Int32 nPageNr )
+        : Element( pParent ), PageNumber( nPageNr ), Hyperlinks(),
+        TopMargin( 0.0 ), BottomMargin( 0.0 ), LeftMargin( 0.0 ), RightMargin( 0.0 )
+        {}
+    private:
+        // helper method for resolveHyperlinks
+        bool resolveHyperlink( const std::list<std::unique_ptr<Element>>::iterator& link_it, std::list<std::unique_ptr<Element>>& rElements );
+    public:
+        virtual ~PageElement() override;
+
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& rParentIt ) override;
+
+        void resolveHyperlinks();
+        void resolveFontStyles( PDFIProcessor const & rProc );
+        void resolveUnderlines( PDFIProcessor const & rProc );
+
+        sal_Int32      PageNumber;
+        ListElement    Hyperlinks; // contains not yet realized links on this page
+        double         TopMargin;
+        double         BottomMargin;
+        double         LeftMargin;
+        double         RightMargin;
+        std::unique_ptr<Element> HeaderElement;
+        std::unique_ptr<Element> FooterElement;
+    };
+
+    struct DocumentElement final : public Element
+    {
+        friend class ElementFactory;
+    public:
+        DocumentElement() : Element( nullptr ) {}
+        virtual ~DocumentElement() override;
+
+        virtual void visitedBy( ElementTreeVisitor&, const std::list< std::unique_ptr<Element> >::const_iterator& ) override;
+    };
+
+    // this class is the differentiator of document types: it will create
+    // Element objects with an optimize() method suitable for the document type
+    class ElementFactory
+    {
+    public:
+        ElementFactory() = delete;
+
+        static HyperlinkElement* createHyperlinkElement( Element* pParent, const OUString& rURI )
+        { return new HyperlinkElement( pParent, rURI ); }
+
+        static TextElement* createTextElement( Element* pParent, sal_Int32 nGCId, sal_Int32 nFontId )
+        { return new TextElement( pParent, nGCId, nFontId ); }
+        static ParagraphElement* createParagraphElement( Element* pParent )
+        { return new ParagraphElement( pParent ); }
+
+        static FrameElement* createFrameElement( Element* pParent, sal_Int32 nGCId )
+        { return new FrameElement( pParent, nGCId ); }
+        static PolyPolyElement*
+            createPolyPolyElement( Element* pParent,
+                                   sal_Int32 nGCId,
+                                   const basegfx::B2DPolyPolygon& rPolyPoly,
+                                   sal_Int8 nAction)
+        { return new PolyPolyElement( pParent, nGCId, rPolyPoly, nAction ); }
+        static ImageElement* createImageElement( Element* pParent, sal_Int32 nGCId, ImageId nImage )
+        { return new ImageElement( pParent, nGCId, nImage ); }
+
+        static PageElement* createPageElement( Element* pParent,
+                                                sal_Int32 nPageNr )
+        { return new PageElement( pParent, nPageNr ); }
+        static std::shared_ptr<DocumentElement> createDocumentElement()
+        { return std::make_shared<DocumentElement>(); }
+    };
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */