diff options
Diffstat (limited to 'drawinglayer/source/processor2d/hittestprocessor2d.cxx')
-rw-r--r-- | drawinglayer/source/processor2d/hittestprocessor2d.cxx | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/drawinglayer/source/processor2d/hittestprocessor2d.cxx b/drawinglayer/source/processor2d/hittestprocessor2d.cxx new file mode 100644 index 0000000000..cc71ea19ab --- /dev/null +++ b/drawinglayer/source/processor2d/hittestprocessor2d.cxx @@ -0,0 +1,451 @@ +/************************************************************************* + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: contourextractor2d.cxx,v $ + * + * $Revision: 1.6 $ + * + * last change: $Author: aw $ $Date: 2008-06-24 15:31:08 $ + * + * The Contents of this file are made available subject to + * the terms of GNU Lesser General Public License Version 2.1. + * + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2005 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This library 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 for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_drawinglayer.hxx" + +#include <drawinglayer/processor2d/hittestprocessor2d.hxx> +#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <drawinglayer/primitive2d/polygonprimitive2d.hxx> +#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/polygon/b2dpolypolygontools.hxx> +#include <drawinglayer/primitive2d/alphaprimitive2d.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> +#include <drawinglayer/primitive2d/sceneprimitive2d.hxx> +#include <drawinglayer/primitive2d/hittestprimitive2d.hxx> +#include <drawinglayer/primitive2d/pointarrayprimitive2d.hxx> + +////////////////////////////////////////////////////////////////////////////// + +namespace drawinglayer +{ + namespace processor2d + { + HitTestProcessor2D::HitTestProcessor2D(const geometry::ViewInformation2D& rViewInformation, + const basegfx::B2DPoint& rLogicHitPosition, + double fLogicHitTolerance, + bool bHitTextOnly) + : BaseProcessor2D(rViewInformation), + maDiscreteHitPosition(), + mfDiscreteHitTolerance(0.0), + mbHit(false), + mbHitToleranceUsed(false), + mbUseHitTestPrimitiveContent(true), + mbHitTextOnly(bHitTextOnly) + { + // init hit tolerance + mfDiscreteHitTolerance = fLogicHitTolerance; + + if(basegfx::fTools::less(mfDiscreteHitTolerance, 0.0)) + { + // ensure input parameter for hit tolerance is >= 0.0 + mfDiscreteHitTolerance = 0.0; + } + else if(basegfx::fTools::more(mfDiscreteHitTolerance, 0.0)) + { + // generate discrete hit tolerance + mfDiscreteHitTolerance = (getViewInformation2D().getObjectToViewTransformation() + * basegfx::B2DVector(mfDiscreteHitTolerance, 0.0)).getLength(); + } + + // gererate discrete hit position + maDiscreteHitPosition = getViewInformation2D().getObjectToViewTransformation() * rLogicHitPosition; + + // check if HitTolerance is used + mbHitToleranceUsed = basegfx::fTools::more(getDiscreteHitTolerance(), 0.0); + } + + HitTestProcessor2D::~HitTestProcessor2D() + { + } + + bool HitTestProcessor2D::checkHairlineHitWithTolerance( + const basegfx::B2DPolygon& rPolygon, + double fDiscreteHitTolerance) + { + basegfx::B2DPolygon aLocalPolygon(rPolygon); + aLocalPolygon.transform(getViewInformation2D().getObjectToViewTransformation()); + + // get discrete range + basegfx::B2DRange aPolygonRange(aLocalPolygon.getB2DRange()); + + if(basegfx::fTools::more(fDiscreteHitTolerance, 0.0)) + { + aPolygonRange.grow(fDiscreteHitTolerance); + } + + // do rough range test first + if(aPolygonRange.isInside(getDiscreteHitPosition())) + { + // check if a polygon edge is hit + return basegfx::tools::isInEpsilonRange( + aLocalPolygon, + getDiscreteHitPosition(), + fDiscreteHitTolerance); + } + + return false; + } + + bool HitTestProcessor2D::checkFillHitWithTolerance( + const basegfx::B2DPolyPolygon& rPolyPolygon, + double fDiscreteHitTolerance) + { + bool bRetval(false); + basegfx::B2DPolyPolygon aLocalPolyPolygon(rPolyPolygon); + aLocalPolyPolygon.transform(getViewInformation2D().getObjectToViewTransformation()); + + // get discrete range + basegfx::B2DRange aPolygonRange(aLocalPolyPolygon.getB2DRange()); + const bool bDiscreteHitToleranceUsed(basegfx::fTools::more(fDiscreteHitTolerance, 0.0)); + + if(bDiscreteHitToleranceUsed) + { + aPolygonRange.grow(fDiscreteHitTolerance); + } + + // do rough range test first + if(aPolygonRange.isInside(getDiscreteHitPosition())) + { + // if a HitTolerance is given, check for polygon edge hit in epsilon first + if(bDiscreteHitToleranceUsed && + basegfx::tools::isInEpsilonRange( + aLocalPolyPolygon, + getDiscreteHitPosition(), + fDiscreteHitTolerance)) + { + bRetval = true; + } + + // check for hit in filled polyPolygon + if(!bRetval && basegfx::tools::isInside( + aLocalPolyPolygon, + getDiscreteHitPosition(), + true)) + { + bRetval = true; + } + } + + return bRetval; + } + + void HitTestProcessor2D::processBasePrimitive2D(const primitive2d::BasePrimitive2D& rCandidate) + { + if(getHit()) + { + // stop processing as soon as a hit was recognized + return; + } + + switch(rCandidate.getPrimitiveID()) + { + case PRIMITIVE2D_ID_TRANSFORMPRIMITIVE2D : + { + // remember current ViewInformation2D + const primitive2d::TransformPrimitive2D& rTransformCandidate(static_cast< const primitive2d::TransformPrimitive2D& >(rCandidate)); + const geometry::ViewInformation2D aLastViewInformation2D(getViewInformation2D()); + + // create new local ViewInformation2D containing transformation + const geometry::ViewInformation2D aViewInformation2D( + getViewInformation2D().getObjectTransformation() * rTransformCandidate.getTransformation(), + getViewInformation2D().getViewTransformation(), + getViewInformation2D().getViewport(), + getViewInformation2D().getVisualizedPage(), + getViewInformation2D().getViewTime(), + getViewInformation2D().getExtendedInformationSequence()); + updateViewInformation(aViewInformation2D); + + // proccess child content recursively + process(rTransformCandidate.getChildren()); + + // restore transformations + updateViewInformation(aLastViewInformation2D); + + break; + } + case PRIMITIVE2D_ID_POLYGONHAIRLINEPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // create hairline in discrete coordinates + const primitive2d::PolygonHairlinePrimitive2D& rPolygonCandidate(static_cast< const primitive2d::PolygonHairlinePrimitive2D& >(rCandidate)); + + // use hairline test + mbHit = checkHairlineHitWithTolerance(rPolygonCandidate.getB2DPolygon(), getDiscreteHitTolerance()); + } + + break; + } + case PRIMITIVE2D_ID_POLYGONMARKERPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // handle marker like hairline; no need to decompose in dashes + const primitive2d::PolygonMarkerPrimitive2D& rPolygonCandidate(static_cast< const primitive2d::PolygonMarkerPrimitive2D& >(rCandidate)); + + // use hairline test + mbHit = checkHairlineHitWithTolerance(rPolygonCandidate.getB2DPolygon(), getDiscreteHitTolerance()); + } + + break; + } + case PRIMITIVE2D_ID_POLYGONSTROKEPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // handle stroke evtl. directly; no need to decompose to filled polygon outlines + const primitive2d::PolygonStrokePrimitive2D& rPolygonCandidate(static_cast< const primitive2d::PolygonStrokePrimitive2D& >(rCandidate)); + const attribute::LineAttribute& rLineAttribute = rPolygonCandidate.getLineAttribute(); + + if(basegfx::fTools::more(rLineAttribute.getWidth(), 0.0)) + { + if(basegfx::B2DLINEJOIN_MITER == rLineAttribute.getLineJoin()) + { + // if line is mitered, use decomposition since mitered line + // geometry may use more space than the geometry grown by half line width + process(rCandidate.get2DDecomposition(getViewInformation2D())); + } + else + { + // for all other B2DLINEJOIN_* do a hairline HitTest with expanded tolerance + const basegfx::B2DVector aDiscreteHalfLineVector(getViewInformation2D().getObjectToViewTransformation() + * basegfx::B2DVector(rLineAttribute.getWidth() * 0.5, 0.0)); + mbHit = checkHairlineHitWithTolerance( + rPolygonCandidate.getB2DPolygon(), + getDiscreteHitTolerance() + aDiscreteHalfLineVector.getLength()); + } + } + else + { + // hairline; fallback to hairline test. Do not decompose + // since this may decompose the hairline to dashes + mbHit = checkHairlineHitWithTolerance(rPolygonCandidate.getB2DPolygon(), getDiscreteHitTolerance()); + } + } + + break; + } + case PRIMITIVE2D_ID_POLYGONWAVEPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // do not use decompose; just handle like a line with width + const primitive2d::PolygonWavePrimitive2D& rPolygonCandidate(static_cast< const primitive2d::PolygonWavePrimitive2D& >(rCandidate)); + double fLogicHitTolerance(0.0); + + // if WaveHeight, grow by it + if(basegfx::fTools::more(rPolygonCandidate.getWaveHeight(), 0.0)) + { + fLogicHitTolerance += rPolygonCandidate.getWaveHeight(); + } + + // if line width, grow by it + if(basegfx::fTools::more(rPolygonCandidate.getLineAttribute().getWidth(), 0.0)) + { + fLogicHitTolerance += rPolygonCandidate.getLineAttribute().getWidth() * 0.5; + } + + const basegfx::B2DVector aDiscreteHalfLineVector(getViewInformation2D().getObjectToViewTransformation() + * basegfx::B2DVector(fLogicHitTolerance, 0.0)); + + mbHit = checkHairlineHitWithTolerance( + rPolygonCandidate.getB2DPolygon(), + getDiscreteHitTolerance() + aDiscreteHalfLineVector.getLength()); + } + + break; + } + case PRIMITIVE2D_ID_POLYPOLYGONCOLORPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // create filled polyPolygon in discrete coordinates + const primitive2d::PolyPolygonColorPrimitive2D& rPolygonCandidate(static_cast< const primitive2d::PolyPolygonColorPrimitive2D& >(rCandidate)); + + // use fill hit test + mbHit = checkFillHitWithTolerance(rPolygonCandidate.getB2DPolyPolygon(), getDiscreteHitTolerance()); + } + + break; + } + case PRIMITIVE2D_ID_ALPHAPRIMITIVE2D : + { + // sub-transparence group + const primitive2d::AlphaPrimitive2D& rTransCandidate(static_cast< const primitive2d::AlphaPrimitive2D& >(rCandidate)); + + // Currently the transparence content is not taken into account; only + // the children are recursively checked for hit. This may be refined for + // parts where the content is completely transparent if needed. + process(rTransCandidate.getChildren()); + + break; + } + case PRIMITIVE2D_ID_MASKPRIMITIVE2D : + { + // create mask in discrete coordinates; only recursively continue + // with content when HitTest position is inside the mask + const primitive2d::MaskPrimitive2D& rMaskCandidate(static_cast< const primitive2d::MaskPrimitive2D& >(rCandidate)); + + // use fill hit test + if(checkFillHitWithTolerance(rMaskCandidate.getMask(), getDiscreteHitTolerance())) + { + // recursively HitTest children + process(rMaskCandidate.getChildren()); + } + + break; + } + case PRIMITIVE2D_ID_SCENEPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // 2D Scene primitive containing 3D stuff; extract 2D contour in world coordinates + // This may be refined later to an own 3D HitTest renderer which processes the 3D + // geometry directly + const primitive2d::ScenePrimitive2D& rScenePrimitive2DCandidate(static_cast< const primitive2d::ScenePrimitive2D& >(rCandidate)); + const primitive2d::Primitive2DSequence xExtracted2DSceneGeometry(rScenePrimitive2DCandidate.getGeometry2D(getViewInformation2D())); + + if(xExtracted2DSceneGeometry.hasElements()) + { + // proccess extracted 2D content + process(xExtracted2DSceneGeometry); + } + else + { + // empty 3D scene; Check for border hit + const basegfx::B2DRange aRange(rCandidate.getB2DRange(getViewInformation2D())); + basegfx::B2DPolygon aOutline(basegfx::tools::createPolygonFromRect(aRange)); + + mbHit = checkHairlineHitWithTolerance(aOutline, getDiscreteHitTolerance()); + } + } + + break; + } + case PRIMITIVE2D_ID_WRONGSPELLPRIMITIVE2D : + case PRIMITIVE2D_ID_MARKERARRAYPRIMITIVE2D : + case PRIMITIVE2D_ID_GRIDPRIMITIVE2D : + case PRIMITIVE2D_ID_HELPLINEPRIMITIVE2D : + { + // ignorable primitives + break; + } + case PRIMITIVE2D_ID_TEXTSIMPLEPORTIONPRIMITIVE2D : + case PRIMITIVE2D_ID_TEXTDECORATEDPORTIONPRIMITIVE2D : + { + // for text use the BoundRect of the primitive itself + const basegfx::B2DRange aRange(rCandidate.getB2DRange(getViewInformation2D())); + basegfx::B2DPolygon aOutline(basegfx::tools::createPolygonFromRect(aRange)); + + mbHit = checkFillHitWithTolerance(basegfx::B2DPolyPolygon(aOutline), getDiscreteHitTolerance()); + + break; + } + case PRIMITIVE2D_ID_BITMAPPRIMITIVE2D : + case PRIMITIVE2D_ID_METAFILEPRIMITIVE2D : + case PRIMITIVE2D_ID_CONTROLPRIMITIVE2D : + case PRIMITIVE2D_ID_FILLGRADIENTPRIMITIVE2D : + case PRIMITIVE2D_ID_FILLHATCHPRIMITIVE2D : + case PRIMITIVE2D_ID_PAGEPREVIEWPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + // Class of primitives for which just the BoundRect of the primitive itself + // will be used for HitTest currently. + // + // This may be refined in the future, e.g: + // - For Bitamps, the mask and/or alpha information may be used + // - For MetaFiles, the MetaFile content may be used + const basegfx::B2DRange aRange(rCandidate.getB2DRange(getViewInformation2D())); + basegfx::B2DPolygon aOutline(basegfx::tools::createPolygonFromRect(aRange)); + + mbHit = checkFillHitWithTolerance(basegfx::B2DPolyPolygon(aOutline), getDiscreteHitTolerance()); + } + + break; + } + case PRIMITIVE2D_ID_HITTESTPRIMITIVE2D : + { + // HitTest primitive; the default decomposition would return an empty seqence, + // so force this primitive to process it's children directly if the switch is set + // (which is the default). Else, ignore invisible content + if(getUseHitTestPrimitiveContent()) + { + const primitive2d::HitTestPrimitive2D& rHitTestCandidate(static_cast< const primitive2d::HitTestPrimitive2D& >(rCandidate)); + process(rHitTestCandidate.getChildren()); + } + + break; + } + case PRIMITIVE2D_ID_POINTARRAYPRIMITIVE2D : + { + if(!getHitTextOnly()) + { + const primitive2d::PointArrayPrimitive2D& rPointArrayCandidate(static_cast< const primitive2d::PointArrayPrimitive2D& >(rCandidate)); + const std::vector< basegfx::B2DPoint >& rPositions = rPointArrayCandidate.getPositions(); + const sal_uInt32 nCount(rPositions.size()); + + for(sal_uInt32 a(0); !getHit() && a < nCount; a++) + { + const basegfx::B2DPoint aPosition(getViewInformation2D().getObjectToViewTransformation() * rPositions[a]); + const basegfx::B2DVector aDistance(aPosition - getDiscreteHitPosition()); + + if(aDistance.getLength() <= getDiscreteHitTolerance()) + { + mbHit = true; + } + } + } + + break; + } + default : + { + // process recursively + process(rCandidate.get2DDecomposition(getViewInformation2D())); + + break; + } + } + } + + } // end of namespace processor2d +} // end of namespace drawinglayer + +////////////////////////////////////////////////////////////////////////////// +// eof |