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, 428 insertions, 0 deletions

diff --git a/canvas/source/vcl/textlayout.cxx b/canvas/source/vcl/textlayout.cxx
new file mode 100644
index 000000000..63a3453ff
--- /dev/null
+++ b/canvas/source/vcl/textlayout.cxx
@@ -0,0 +1,428 @@
+/* -*- 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 <tools/diagnose_ex.h>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <com/sun/star/rendering/CompositeOperation.hpp>
+#include <com/sun/star/rendering/RenderState.hpp>
+#include <com/sun/star/rendering/TextDirection.hpp>
+#include <com/sun/star/rendering/ViewState.hpp>
+#include <comphelper/sequence.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <utility>
+#include <vcl/metric.hxx>
+#include <vcl/virdev.hxx>
+
+#include <canvas/canvastools.hxx>
+
+#include "textlayout.hxx"
+
+#include <memory>
+
+using namespace ::com::sun::star;
+
+namespace vclcanvas
+{
+    namespace
+    {
+        void setupLayoutMode( OutputDevice& rOutDev,
+                              sal_Int8      nTextDirection )
+        {
+            // TODO(P3): avoid if already correctly set
+            vcl::text::ComplexTextLayoutFlags nLayoutMode = vcl::text::ComplexTextLayoutFlags::Default;
+            switch( nTextDirection )
+            {
+                case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
+                    break;
+                case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
+                    nLayoutMode = vcl::text::ComplexTextLayoutFlags::BiDiStrong;
+                    break;
+                case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
+                    nLayoutMode = vcl::text::ComplexTextLayoutFlags::BiDiRtl;
+                    break;
+                case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
+                    nLayoutMode = vcl::text::ComplexTextLayoutFlags::BiDiRtl | vcl::text::ComplexTextLayoutFlags::BiDiStrong;
+                    break;
+                default:
+                    break;
+            }
+
+            // set calculated layout mode. Origin is always the left edge,
+            // as required at the API spec
+            rOutDev.SetLayoutMode( nLayoutMode | vcl::text::ComplexTextLayoutFlags::TextOriginLeft );
+        }
+    }
+
+    TextLayout::TextLayout( rendering::StringContext                   aText,
+                            sal_Int8                                   nDirection,
+                            CanvasFont::Reference                      rFont,
+                            uno::Reference<rendering::XGraphicDevice>  xDevice,
+                            OutDevProviderSharedPtr                    xOutDev ) :
+        TextLayout_Base( m_aMutex ),
+        maText(std::move( aText )),
+        mpFont(std::move( rFont )),
+        mxDevice(std::move( xDevice )),
+        mpOutDevProvider(std::move( xOutDev )),
+        mnTextDirection( nDirection )
+    {}
+
+    void SAL_CALL TextLayout::disposing()
+    {
+        SolarMutexGuard aGuard;
+
+        mpOutDevProvider.reset();
+        mxDevice.clear();
+        mpFont.clear();
+    }
+
+    // XTextLayout
+    uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > > SAL_CALL TextLayout::queryTextShapes(  )
+    {
+        SolarMutexGuard aGuard;
+
+        OutputDevice& rOutDev = mpOutDevProvider->getOutDev();
+        ScopedVclPtrInstance< VirtualDevice > pVDev( rOutDev );
+        pVDev->SetFont( mpFont->getVCLFont() );
+
+        setupLayoutMode( *pVDev, mnTextDirection );
+
+        const rendering::ViewState aViewState(
+            geometry::AffineMatrix2D(1,0,0, 0,1,0),
+            nullptr);
+
+        rendering::RenderState aRenderState (
+            geometry::AffineMatrix2D(1,0,0,0,1,0),
+            nullptr,
+            uno::Sequence<double>(4),
+            rendering::CompositeOperation::SOURCE);
+
+        std::vector<sal_Int32> aOffsets(maLogicalAdvancements.getLength());
+        setupTextOffsets(aOffsets.data(), maLogicalAdvancements, aViewState, aRenderState);
+
+        std::vector< uno::Reference< rendering::XPolyPolygon2D> > aOutlineSequence;
+        ::basegfx::B2DPolyPolygonVector aOutlines;
+        if (pVDev->GetTextOutlines(
+            aOutlines,
+            maText.Text,
+            maText.StartPosition,
+            maText.StartPosition,
+            maText.Length,
+            0,
+            aOffsets))
+        {
+            aOutlineSequence.reserve(aOutlines.size());
+            sal_Int32 nIndex (0);
+            for (auto const& outline : aOutlines)
+            {
+                aOutlineSequence[nIndex++] = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                    mxDevice,
+                    outline);
+            }
+        }
+
+        return comphelper::containerToSequence(aOutlineSequence);
+    }
+
+    uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryInkMeasures(  )
+    {
+        SolarMutexGuard aGuard;
+
+
+        OutputDevice& rOutDev = mpOutDevProvider->getOutDev();
+        ScopedVclPtrInstance< VirtualDevice > pVDev( rOutDev );
+        pVDev->SetFont( mpFont->getVCLFont() );
+
+        setupLayoutMode( *pVDev, mnTextDirection );
+
+        const rendering::ViewState aViewState(
+            geometry::AffineMatrix2D(1,0,0, 0,1,0),
+            nullptr);
+
+        rendering::RenderState aRenderState (
+            geometry::AffineMatrix2D(1,0,0,0,1,0),
+            nullptr,
+            uno::Sequence<double>(4),
+            rendering::CompositeOperation::SOURCE);
+
+        std::unique_ptr< sal_Int32 []> aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]);
+        setupTextOffsets(aOffsets.get(), maLogicalAdvancements, aViewState, aRenderState);
+
+        std::vector< ::tools::Rectangle > aMetricVector;
+        uno::Sequence<geometry::RealRectangle2D> aBoundingBoxes;
+        if (pVDev->GetGlyphBoundRects(
+            Point(0,0),
+            maText.Text,
+            ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
+            ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length),
+            aMetricVector))
+        {
+            aBoundingBoxes.realloc(aMetricVector.size());
+            auto pBoundingBoxes = aBoundingBoxes.getArray();
+            sal_Int32 nIndex (0);
+            for (auto const& metric : aMetricVector)
+            {
+                pBoundingBoxes[nIndex++] = geometry::RealRectangle2D(
+                    metric.Left(),
+                    metric.Top(),
+                    metric.Right(),
+                    metric.Bottom());
+            }
+        }
+        return aBoundingBoxes;
+    }
+
+    uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryMeasures(  )
+    {
+        // TODO(F1)
+        return uno::Sequence< geometry::RealRectangle2D >();
+    }
+
+    uno::Sequence< double > SAL_CALL TextLayout::queryLogicalAdvancements(  )
+    {
+        SolarMutexGuard aGuard;
+
+        return maLogicalAdvancements;
+    }
+
+    void SAL_CALL TextLayout::applyLogicalAdvancements( const uno::Sequence< double >& aAdvancements )
+    {
+        SolarMutexGuard aGuard;
+
+        ENSURE_ARG_OR_THROW( aAdvancements.getLength() == maText.Length,
+                         "TextLayout::applyLogicalAdvancements(): mismatching number of advancements" );
+
+        maLogicalAdvancements = aAdvancements;
+    }
+
+    geometry::RealRectangle2D SAL_CALL TextLayout::queryTextBounds(  )
+    {
+        SolarMutexGuard aGuard;
+
+        if( !mpOutDevProvider )
+            return geometry::RealRectangle2D();
+
+        OutputDevice& rOutDev = mpOutDevProvider->getOutDev();
+
+        ScopedVclPtrInstance< VirtualDevice > pVDev( rOutDev );
+        pVDev->SetFont( mpFont->getVCLFont() );
+
+        // need metrics for Y offset, the XCanvas always renders
+        // relative to baseline
+        const ::FontMetric& aMetric( pVDev->GetFontMetric() );
+
+        setupLayoutMode( *pVDev, mnTextDirection );
+
+        const sal_Int32 nAboveBaseline( -aMetric.GetAscent() );
+        const sal_Int32 nBelowBaseline( aMetric.GetDescent() );
+
+        if( maLogicalAdvancements.hasElements() )
+        {
+            return geometry::RealRectangle2D( 0, nAboveBaseline,
+                                              maLogicalAdvancements[ maLogicalAdvancements.getLength()-1 ],
+                                              nBelowBaseline );
+        }
+        else
+        {
+            return geometry::RealRectangle2D( 0, nAboveBaseline,
+                                              pVDev->GetTextWidth(
+                                                  maText.Text,
+                                                  ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
+                                                  ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) ),
+                                              nBelowBaseline );
+        }
+    }
+
+    double SAL_CALL TextLayout::justify( double )
+    {
+        // TODO(F1)
+        return 0.0;
+    }
+
+    double SAL_CALL TextLayout::combinedJustify( const uno::Sequence< uno::Reference< rendering::XTextLayout > >&,
+                                                 double )
+    {
+        // TODO(F1)
+        return 0.0;
+    }
+
+    rendering::TextHit SAL_CALL TextLayout::getTextHit( const geometry::RealPoint2D& )
+    {
+        // TODO(F1)
+        return rendering::TextHit();
+    }
+
+    rendering::Caret SAL_CALL TextLayout::getCaret( sal_Int32, sal_Bool )
+    {
+        // TODO(F1)
+        return rendering::Caret();
+    }
+
+    sal_Int32 SAL_CALL TextLayout::getNextInsertionIndex( sal_Int32, sal_Int32, sal_Bool )
+    {
+        // TODO(F1)
+        return 0;
+    }
+
+    uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryVisualHighlighting( sal_Int32, sal_Int32 )
+    {
+        // TODO(F1)
+        return uno::Reference< rendering::XPolyPolygon2D >();
+    }
+
+    uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryLogicalHighlighting( sal_Int32, sal_Int32 )
+    {
+        // TODO(F1)
+        return uno::Reference< rendering::XPolyPolygon2D >();
+    }
+
+    double SAL_CALL TextLayout::getBaselineOffset(  )
+    {
+        // TODO(F1)
+        return 0.0;
+    }
+
+    sal_Int8 SAL_CALL TextLayout::getMainTextDirection(  )
+    {
+        SolarMutexGuard aGuard;
+
+        return mnTextDirection;
+    }
+
+    uno::Reference< rendering::XCanvasFont > SAL_CALL TextLayout::getFont(  )
+    {
+        SolarMutexGuard aGuard;
+
+        return mpFont;
+    }
+
+    rendering::StringContext SAL_CALL TextLayout::getText(  )
+    {
+        SolarMutexGuard aGuard;
+
+        return maText;
+    }
+
+    void TextLayout::draw( OutputDevice&                 rOutDev,
+                           const Point&                  rOutpos,
+                           const rendering::ViewState&   viewState,
+                           const rendering::RenderState& renderState ) const
+    {
+        SolarMutexGuard aGuard;
+
+        setupLayoutMode( rOutDev, mnTextDirection );
+
+        if( maLogicalAdvancements.hasElements() )
+        {
+            // TODO(P2): cache that
+            std::vector<sal_Int32> aOffsets(maLogicalAdvancements.getLength());
+            setupTextOffsets( aOffsets.data(), maLogicalAdvancements, viewState, renderState );
+
+            // TODO(F3): ensure correct length and termination for DX
+            // array (last entry _must_ contain the overall width)
+
+            rOutDev.DrawTextArray( rOutpos,
+                                   maText.Text,
+                                   aOffsets,
+                                   ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
+                                   ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
+        }
+        else
+        {
+            rOutDev.DrawText( rOutpos,
+                              maText.Text,
+                              ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
+                              ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
+        }
+    }
+
+    namespace
+    {
+        class OffsetTransformer
+        {
+        public:
+            explicit OffsetTransformer( ::basegfx::B2DHomMatrix aMat ) :
+                maMatrix(std::move( aMat ))
+            {
+            }
+
+            sal_Int32 operator()( const double& rOffset )
+            {
+                // This is an optimization of the normal rMat*[x,0]
+                // transformation of the advancement vector (in x
+                // direction), followed by a length calculation of the
+                // resulting vector: advancement' =
+                // ||rMat*[x,0]||. Since advancements are vectors, we
+                // can ignore translational components, thus if [x,0],
+                // it follows that rMat*[x,0]=[x',0] holds. Thus, we
+                // just have to calc the transformation of the x
+                // component.
+
+                // TODO(F2): Handle non-horizontal advancements!
+                return ::basegfx::fround( hypot(maMatrix.get(0,0)*rOffset,
+                                                maMatrix.get(1,0)*rOffset) );
+            }
+
+        private:
+            ::basegfx::B2DHomMatrix maMatrix;
+        };
+    }
+
+    void TextLayout::setupTextOffsets( sal_Int32*                       outputOffsets,
+                                       const uno::Sequence< double >&   inputOffsets,
+                                       const rendering::ViewState&      viewState,
+                                       const rendering::RenderState&    renderState     ) const
+    {
+        ENSURE_OR_THROW( outputOffsets!=nullptr,
+                          "TextLayout::setupTextOffsets offsets NULL" );
+
+        ::basegfx::B2DHomMatrix aMatrix;
+
+        ::canvas::tools::mergeViewAndRenderTransform(aMatrix,
+                                                     viewState,
+                                                     renderState);
+
+        // fill integer offsets
+        std::transform( inputOffsets.begin(),
+                          inputOffsets.end(),
+                          outputOffsets,
+                          OffsetTransformer( aMatrix ) );
+    }
+
+    OUString SAL_CALL TextLayout::getImplementationName()
+    {
+        return "VCLCanvas::TextLayout";
+    }
+
+    sal_Bool SAL_CALL TextLayout::supportsService( const OUString& ServiceName )
+    {
+        return cppu::supportsService( this, ServiceName );
+    }
+
+    uno::Sequence< OUString > SAL_CALL TextLayout::getSupportedServiceNames()
+    {
+        return { "com.sun.star.rendering.TextLayout" };
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */