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Diffstat (limited to 'canvas/source/vcl/textlayout.cxx')
| -rw-r--r-- | canvas/source/vcl/textlayout.cxx | 496 |
1 files changed, 496 insertions, 0 deletions
diff --git a/canvas/source/vcl/textlayout.cxx b/canvas/source/vcl/textlayout.cxx new file mode 100644 index 000000000000..a2fd331fa66f --- /dev/null +++ b/canvas/source/vcl/textlayout.cxx @@ -0,0 +1,496 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_canvas.hxx" + +#include <canvas/debug.hxx> +#include <tools/diagnose_ex.h> +#include <canvas/canvastools.hxx> + +#include <com/sun/star/rendering/CompositeOperation.hpp> +#include <com/sun/star/rendering/TextDirection.hpp> + +#include <vcl/metric.hxx> +#include <vcl/virdev.hxx> + +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/numeric/ftools.hxx> +#include <basegfx/tools/canvastools.hxx> + +#include "impltools.hxx" +#include "textlayout.hxx" + +#include <boost/scoped_array.hpp> + + +using namespace ::com::sun::star; + +namespace vclcanvas +{ + namespace + { + void setupLayoutMode( OutputDevice& rOutDev, + sal_Int8 nTextDirection ) + { + // TODO(P3): avoid if already correctly set + ULONG nLayoutMode; + switch( nTextDirection ) + { + default: + nLayoutMode = 0; + break; + case rendering::TextDirection::WEAK_LEFT_TO_RIGHT: + nLayoutMode = TEXT_LAYOUT_BIDI_LTR; + break; + case rendering::TextDirection::STRONG_LEFT_TO_RIGHT: + nLayoutMode = TEXT_LAYOUT_BIDI_LTR | TEXT_LAYOUT_BIDI_STRONG; + break; + case rendering::TextDirection::WEAK_RIGHT_TO_LEFT: + nLayoutMode = TEXT_LAYOUT_BIDI_RTL; + break; + case rendering::TextDirection::STRONG_RIGHT_TO_LEFT: + nLayoutMode = TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG; + break; + } + + // set calculated layout mode. Origin is always the left edge, + // as required at the API spec + rOutDev.SetLayoutMode( nLayoutMode | TEXT_LAYOUT_TEXTORIGIN_LEFT ); + } + } + + TextLayout::TextLayout( const rendering::StringContext& aText, + sal_Int8 nDirection, + sal_Int64 nRandomSeed, + const CanvasFont::Reference& rFont, + const uno::Reference<rendering::XGraphicDevice>& xDevice, + const OutDevProviderSharedPtr& rOutDev ) : + TextLayout_Base( m_aMutex ), + maText( aText ), + maLogicalAdvancements(), + mpFont( rFont ), + mxDevice( xDevice ), + mpOutDevProvider( rOutDev ), + mnTextDirection( nDirection ) + { + (void)nRandomSeed; + } + + void SAL_CALL TextLayout::disposing() + { + tools::LocalGuard aGuard; + + mpOutDevProvider.reset(); + mxDevice.clear(); + mpFont.reset(); + } + + // XTextLayout + uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > > SAL_CALL TextLayout::queryTextShapes( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + OutputDevice& rOutDev = mpOutDevProvider->getOutDev(); + VirtualDevice aVDev( rOutDev ); + aVDev.SetFont( mpFont->getVCLFont() ); + + setupLayoutMode( aVDev, mnTextDirection ); + + const rendering::ViewState aViewState( + geometry::AffineMatrix2D(1,0,0, 0,1,0), + NULL); + + rendering::RenderState aRenderState ( + geometry::AffineMatrix2D(1,0,0,0,1,0), + NULL, + uno::Sequence<double>(4), + rendering::CompositeOperation::SOURCE); + + ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]); + setupTextOffsets(aOffsets.get(), maLogicalAdvancements, aViewState, aRenderState); + + uno::Sequence< uno::Reference< rendering::XPolyPolygon2D> > aOutlineSequence; + ::basegfx::B2DPolyPolygonVector aOutlines; + if (aVDev.GetTextOutlines( + aOutlines, + maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length), + FALSE, + 0, + aOffsets.get())) + { + aOutlineSequence.realloc(aOutlines.size()); + sal_Int32 nIndex (0); + for (::basegfx::B2DPolyPolygonVector::const_iterator + iOutline(aOutlines.begin()), + iEnd(aOutlines.end()); + iOutline!=iEnd; + ++iOutline) + { + aOutlineSequence[nIndex++] = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon( + mxDevice, + *iOutline); + } + } + + return aOutlineSequence; + } + + uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryInkMeasures( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + + OutputDevice& rOutDev = mpOutDevProvider->getOutDev(); + VirtualDevice aVDev( rOutDev ); + aVDev.SetFont( mpFont->getVCLFont() ); + + setupLayoutMode( aVDev, mnTextDirection ); + + const rendering::ViewState aViewState( + geometry::AffineMatrix2D(1,0,0, 0,1,0), + NULL); + + rendering::RenderState aRenderState ( + geometry::AffineMatrix2D(1,0,0,0,1,0), + NULL, + uno::Sequence<double>(4), + rendering::CompositeOperation::SOURCE); + + ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]); + setupTextOffsets(aOffsets.get(), maLogicalAdvancements, aViewState, aRenderState); + + MetricVector aMetricVector; + uno::Sequence<geometry::RealRectangle2D> aBoundingBoxes; + if (aVDev.GetGlyphBoundRects( + Point(0,0), + maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length), + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + aMetricVector)) + { + aBoundingBoxes.realloc(aMetricVector.size()); + sal_Int32 nIndex (0); + for (MetricVector::const_iterator + iMetric(aMetricVector.begin()), + iEnd(aMetricVector.end()); + iMetric!=iEnd; + ++iMetric) + { + aBoundingBoxes[nIndex++] = geometry::RealRectangle2D( + iMetric->getX(), + iMetric->getY(), + iMetric->getX() + iMetric->getWidth(), + iMetric->getY() + iMetric->getHeight()); + } + } + return aBoundingBoxes; + } + + uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryMeasures( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + // TODO(F1) + return uno::Sequence< geometry::RealRectangle2D >(); + } + + uno::Sequence< double > SAL_CALL TextLayout::queryLogicalAdvancements( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + return maLogicalAdvancements; + } + + void SAL_CALL TextLayout::applyLogicalAdvancements( const uno::Sequence< double >& aAdvancements ) throw (lang::IllegalArgumentException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + ENSURE_ARG_OR_THROW( aAdvancements.getLength() == maText.Length, + "TextLayout::applyLogicalAdvancements(): mismatching number of advancements" ); + + maLogicalAdvancements = aAdvancements; + } + + geometry::RealRectangle2D SAL_CALL TextLayout::queryTextBounds( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + if( !mpOutDevProvider ) + return geometry::RealRectangle2D(); + + OutputDevice& rOutDev = mpOutDevProvider->getOutDev(); + + VirtualDevice aVDev( rOutDev ); + aVDev.SetFont( mpFont->getVCLFont() ); + + // need metrics for Y offset, the XCanvas always renders + // relative to baseline + const ::FontMetric& aMetric( aVDev.GetFontMetric() ); + + setupLayoutMode( aVDev, mnTextDirection ); + + const sal_Int32 nAboveBaseline( /*-aMetric.GetIntLeading()*/ - aMetric.GetAscent() ); + const sal_Int32 nBelowBaseline( aMetric.GetDescent() ); + + if( maLogicalAdvancements.getLength() ) + { + return geometry::RealRectangle2D( 0, nAboveBaseline, + maLogicalAdvancements[ maLogicalAdvancements.getLength()-1 ], + nBelowBaseline ); + } + else + { + return geometry::RealRectangle2D( 0, nAboveBaseline, + aVDev.GetTextWidth( + maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length) ), + nBelowBaseline ); + } + } + + double SAL_CALL TextLayout::justify( double nSize ) throw (lang::IllegalArgumentException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)nSize; + + // TODO(F1) + return 0.0; + } + + double SAL_CALL TextLayout::combinedJustify( const uno::Sequence< uno::Reference< rendering::XTextLayout > >& aNextLayouts, + double nSize ) throw (lang::IllegalArgumentException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)aNextLayouts; + (void)nSize; + + // TODO(F1) + return 0.0; + } + + rendering::TextHit SAL_CALL TextLayout::getTextHit( const geometry::RealPoint2D& aHitPoint ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)aHitPoint; + + // TODO(F1) + return rendering::TextHit(); + } + + rendering::Caret SAL_CALL TextLayout::getCaret( sal_Int32 nInsertionIndex, sal_Bool bExcludeLigatures ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)nInsertionIndex; + (void)bExcludeLigatures; + + // TODO(F1) + return rendering::Caret(); + } + + sal_Int32 SAL_CALL TextLayout::getNextInsertionIndex( sal_Int32 nStartIndex, sal_Int32 nCaretAdvancement, sal_Bool bExcludeLigatures ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)nStartIndex; + (void)nCaretAdvancement; + (void)bExcludeLigatures; + + // TODO(F1) + return 0; + } + + uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryVisualHighlighting( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)nStartIndex; + (void)nEndIndex; + + // TODO(F1) + return uno::Reference< rendering::XPolyPolygon2D >(); + } + + uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryLogicalHighlighting( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException) + { + tools::LocalGuard aGuard; + + (void)nStartIndex; + (void)nEndIndex; + + // TODO(F1) + return uno::Reference< rendering::XPolyPolygon2D >(); + } + + double SAL_CALL TextLayout::getBaselineOffset( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + // TODO(F1) + return 0.0; + } + + sal_Int8 SAL_CALL TextLayout::getMainTextDirection( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + return mnTextDirection; + } + + uno::Reference< rendering::XCanvasFont > SAL_CALL TextLayout::getFont( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + return mpFont.getRef(); + } + + rendering::StringContext SAL_CALL TextLayout::getText( ) throw (uno::RuntimeException) + { + tools::LocalGuard aGuard; + + return maText; + } + + bool TextLayout::draw( OutputDevice& rOutDev, + const Point& rOutpos, + const rendering::ViewState& viewState, + const rendering::RenderState& renderState ) const + { + tools::LocalGuard aGuard; + + setupLayoutMode( rOutDev, mnTextDirection ); + + if( maLogicalAdvancements.getLength() ) + { + // TODO(P2): cache that + ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]); + setupTextOffsets( aOffsets.get(), 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.get(), + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); + } + else + { + rOutDev.DrawText( rOutpos, + maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); + } + + return true; + } + + namespace + { + class OffsetTransformer + { + public: + OffsetTransformer( const ::basegfx::B2DHomMatrix& rMat ) : + maMatrix( rMat ) + { + } + + 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!=NULL, + "TextLayout::setupTextOffsets offsets NULL" ); + + ::basegfx::B2DHomMatrix aMatrix; + + ::canvas::tools::mergeViewAndRenderTransform(aMatrix, + viewState, + renderState); + + // fill integer offsets + ::std::transform( const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray(), + const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray()+inputOffsets.getLength(), + outputOffsets, + OffsetTransformer( aMatrix ) ); + } + + +#define IMPLEMENTATION_NAME "VCLCanvas::TextLayout" +#define SERVICE_NAME "com.sun.star.rendering.TextLayout" + + ::rtl::OUString SAL_CALL TextLayout::getImplementationName() throw( uno::RuntimeException ) + { + return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( IMPLEMENTATION_NAME ) ); + } + + sal_Bool SAL_CALL TextLayout::supportsService( const ::rtl::OUString& ServiceName ) throw( uno::RuntimeException ) + { + return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME ) ); + } + + uno::Sequence< ::rtl::OUString > SAL_CALL TextLayout::getSupportedServiceNames() throw( uno::RuntimeException ) + { + uno::Sequence< ::rtl::OUString > aRet(1); + aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) ); + + return aRet; + } +} |