libreoffice/canvas/source/cairo/cairo_textlayout.hxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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 .
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#ifndef INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_TEXTLAYOUT_HXX
#define INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_TEXTLAYOUT_HXX

#include <cppuhelper/compbase.hxx>
#include <comphelper/broadcasthelper.hxx>

#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/rendering/XTextLayout.hpp>

#include <basegfx/vector/b2isize.hxx>

#include <vcl/outdev.hxx>

#include <vcl/cairo.hxx>
#include "cairo_canvasfont.hxx"


/* Definition of TextLayout class */

namespace cairocanvas
{
    typedef ::cppu::WeakComponentImplHelper< css::rendering::XTextLayout,
                                             css::lang::XServiceInfo > TextLayout_Base;

    class TextLayout : public ::comphelper::OBaseMutex,
                       public TextLayout_Base
    {
    public:
        /// make noncopyable
        TextLayout(const TextLayout&) = delete;
        const TextLayout& operator=(const TextLayout&) = delete;

        TextLayout( const css::rendering::StringContext&              aText,
                    sal_Int8                                          nDirection,
                    sal_Int64                                         nRandomSeed,
                    const CanvasFont::Reference&                      rFont,
                    const SurfaceProviderRef&                         rRefDevice );

        /// Dispose all internal references
        virtual void SAL_CALL disposing() override;

        // XTextLayout
        virtual css::uno::Sequence< css::uno::Reference< css::rendering::XPolyPolygon2D > > SAL_CALL queryTextShapes(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Sequence< css::geometry::RealRectangle2D > SAL_CALL queryInkMeasures(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Sequence< css::geometry::RealRectangle2D > SAL_CALL queryMeasures(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Sequence< double > SAL_CALL queryLogicalAdvancements(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual void SAL_CALL applyLogicalAdvancements( const css::uno::Sequence< double >& aAdvancements ) throw (css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
        virtual css::geometry::RealRectangle2D SAL_CALL queryTextBounds(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual double SAL_CALL justify( double nSize ) throw (css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
        virtual double SAL_CALL combinedJustify( const css::uno::Sequence< css::uno::Reference< css::rendering::XTextLayout > >& aNextLayouts, double nSize ) throw (css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
        virtual css::rendering::TextHit SAL_CALL getTextHit( const css::geometry::RealPoint2D& aHitPoint ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::rendering::Caret SAL_CALL getCaret( sal_Int32 nInsertionIndex, sal_Bool bExcludeLigatures ) throw (css::lang::IndexOutOfBoundsException, css::uno::RuntimeException, std::exception) override;
        virtual sal_Int32 SAL_CALL getNextInsertionIndex( sal_Int32 nStartIndex, sal_Int32 nCaretAdvancement, sal_Bool bExcludeLigatures ) throw (css::lang::IndexOutOfBoundsException, css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Reference< css::rendering::XPolyPolygon2D > SAL_CALL queryVisualHighlighting( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (css::lang::IndexOutOfBoundsException, css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Reference< css::rendering::XPolyPolygon2D > SAL_CALL queryLogicalHighlighting( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (css::lang::IndexOutOfBoundsException, css::uno::RuntimeException, std::exception) override;
        virtual double SAL_CALL getBaselineOffset(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual sal_Int8 SAL_CALL getMainTextDirection(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::uno::Reference< css::rendering::XCanvasFont > SAL_CALL getFont(  ) throw (css::uno::RuntimeException, std::exception) override;
        virtual css::rendering::StringContext SAL_CALL getText(  ) throw (css::uno::RuntimeException, std::exception) override;

        // XServiceInfo
        virtual OUString SAL_CALL getImplementationName() throw( css::uno::RuntimeException, std::exception ) override;
        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) throw( css::uno::RuntimeException, std::exception ) override;
        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames()  throw( css::uno::RuntimeException, std::exception ) override;

        bool draw( ::cairo::CairoSharedPtr&                        pSCairo,
                   OutputDevice&                                   rOutDev,
                   const Point&                                    rOutpos,
                   const css::rendering::ViewState&   viewState,
                   const css::rendering::RenderState& renderState ) const;

        void setupTextOffsets( long*                                       outputOffsets,
                               const css::uno::Sequence< double >& inputOffsets,
                               const css::rendering::ViewState&    viewState,
                               const css::rendering::RenderState&  renderState     ) const;

    protected:
        virtual ~TextLayout(); // we're a ref-counted UNO class. _We_ destroy ourselves.

    private:
        css::rendering::StringContext              maText;
        css::uno::Sequence< double >               maLogicalAdvancements;
        CanvasFont::Reference                      mpFont;
        SurfaceProviderRef                         mpRefDevice;
        sal_Int8                                   mnTextDirection;

        bool isCairoRenderable(SystemFontData aSysFontData) const;
    };

}

#endif // INCLUDED_CANVAS_SOURCE_CAIRO_CAIRO_TEXTLAYOUT_HXX

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