summaryrefslogtreecommitdiffstats
path: root/canvas/source/vcl/textlayout.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'canvas/source/vcl/textlayout.cxx')
-rw-r--r--canvas/source/vcl/textlayout.cxx428
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: */