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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 <drawinglayer/geometry/viewinformation2d.hxx>
#include <drawinglayer/primitive2d/borderlineprimitive2d.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
#include <rtl/math.hxx>
#include <algorithm>
namespace drawinglayer::primitive2d
{
BorderLine::BorderLine(
const drawinglayer::attribute::LineAttribute& rLineAttribute,
double fStartLeft,
double fStartRight,
double fEndLeft,
double fEndRight)
: maLineAttribute(rLineAttribute),
mfStartLeft(fStartLeft),
mfStartRight(fStartRight),
mfEndLeft(fEndLeft),
mfEndRight(fEndRight),
mbIsGap(false)
{
}
BorderLine::BorderLine(
double fWidth)
: maLineAttribute(basegfx::BColor(), fWidth),
mfStartLeft(0.0),
mfStartRight(0.0),
mfEndLeft(0.0),
mfEndRight(0.0),
mbIsGap(true)
{
}
BorderLine::~BorderLine()
{
}
bool BorderLine::operator==(const BorderLine& rBorderLine) const
{
return getLineAttribute() == rBorderLine.getLineAttribute()
&& getStartLeft() == rBorderLine.getStartLeft()
&& getStartRight() == rBorderLine.getStartRight()
&& getEndLeft() == rBorderLine.getEndLeft()
&& getEndRight() == rBorderLine.getEndRight()
&& isGap() == rBorderLine.isGap();
}
// helper to add a centered, maybe stroked line primitive to rContainer
static void addPolygonStrokePrimitive2D(
Primitive2DContainer& rContainer,
const basegfx::B2DPoint& rStart,
const basegfx::B2DPoint& rEnd,
const attribute::LineAttribute& rLineAttribute,
const attribute::StrokeAttribute& rStrokeAttribute)
{
basegfx::B2DPolygon aPolygon;
aPolygon.append(rStart);
aPolygon.append(rEnd);
if (rStrokeAttribute.isDefault())
{
rContainer.push_back(
new PolygonStrokePrimitive2D(
aPolygon,
rLineAttribute));
}
else
{
rContainer.push_back(
new PolygonStrokePrimitive2D(
aPolygon,
rLineAttribute,
rStrokeAttribute));
}
}
double BorderLinePrimitive2D::getFullWidth() const
{
double fRetval(0.0);
for(const auto& candidate : maBorderLines)
{
fRetval += candidate.getLineAttribute().getWidth();<--- Consider using std::accumulate algorithm instead of a raw loop.
}
return fRetval;
}
void BorderLinePrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& /*rViewInformation*/) const
{
if (getStart().equal(getEnd()) || getBorderLines().empty())
return;
// get data and vectors
basegfx::B2DVector aVector(getEnd() - getStart());
aVector.normalize();
const basegfx::B2DVector aPerpendicular(basegfx::getPerpendicular(aVector));
const double fFullWidth(getFullWidth());
double fOffset(fFullWidth * -0.5);
for(const auto& candidate : maBorderLines)
{
const double fWidth(candidate.getLineAttribute().getWidth());
if(!candidate.isGap())
{
const basegfx::B2DVector aDeltaY(aPerpendicular * (fOffset + (fWidth * 0.5)));
const basegfx::B2DPoint aStart(getStart() + aDeltaY);
const basegfx::B2DPoint aEnd(getEnd() + aDeltaY);
const bool bStartPerpendicular(rtl::math::approxEqual(candidate.getStartLeft(), candidate.getStartRight()));
const bool bEndPerpendicular(rtl::math::approxEqual(candidate.getEndLeft(), candidate.getEndRight()));
if(bStartPerpendicular && bEndPerpendicular)
{
// start and end extends lead to an edge perpendicular to the line, so we can just use
// a PolygonStrokePrimitive2D for representation
addPolygonStrokePrimitive2D(
rContainer,
aStart - (aVector * candidate.getStartLeft()),
aEnd + (aVector * candidate.getEndLeft()),
candidate.getLineAttribute(),
getStrokeAttribute());
}
else
{
// start and/or end extensions lead to a lineStart/End that is *not*
// perpendicular to the line itself
if(getStrokeAttribute().isDefault() || 0.0 == getStrokeAttribute().getFullDotDashLen())
{
// without stroke, we can simply represent that using a filled polygon
const basegfx::B2DVector aHalfLineOffset(aPerpendicular * (candidate.getLineAttribute().getWidth() * 0.5));
basegfx::B2DPolygon aPolygon;
aPolygon.append(aStart - aHalfLineOffset - (aVector * candidate.getStartLeft()));
aPolygon.append(aEnd - aHalfLineOffset + (aVector * candidate.getEndLeft()));
aPolygon.append(aEnd + aHalfLineOffset + (aVector * candidate.getEndRight()));
aPolygon.append(aStart + aHalfLineOffset - (aVector * candidate.getStartRight()));
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(aPolygon),
candidate.getLineAttribute().getColor()));
}
else
{
// with stroke, we have a problem - a filled polygon would lose the
// stroke. Let's represent the start and/or end as triangles, the main
// line still as PolygonStrokePrimitive2D.
// Fill default line Start/End for stroke, so we need no adaptations in else paths
basegfx::B2DPoint aStrokeStart(aStart - (aVector * candidate.getStartLeft()));
basegfx::B2DPoint aStrokeEnd(aEnd + (aVector * candidate.getEndLeft()));
const basegfx::B2DVector aHalfLineOffset(aPerpendicular * (candidate.getLineAttribute().getWidth() * 0.5));
if(!bStartPerpendicular)
{
const double fMin(std::min(candidate.getStartLeft(), candidate.getStartRight()));
const double fMax(std::max(candidate.getStartLeft(), candidate.getStartRight()));
basegfx::B2DPolygon aPolygon;
// create a triangle with min/max values for LineStart and add
if(rtl::math::approxEqual(candidate.getStartLeft(), fMax))
{
aPolygon.append(aStart - aHalfLineOffset - (aVector * candidate.getStartLeft()));
}
aPolygon.append(aStart - aHalfLineOffset - (aVector * fMin));
aPolygon.append(aStart + aHalfLineOffset - (aVector * fMin));
if(rtl::math::approxEqual(candidate.getStartRight(), fMax))
{
aPolygon.append(aStart + aHalfLineOffset - (aVector * candidate.getStartRight()));
}
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(aPolygon),
candidate.getLineAttribute().getColor()));
// Adapt StrokeStart accordingly
aStrokeStart = aStart - (aVector * fMin);
}
if(!bEndPerpendicular)
{
const double fMin(std::min(candidate.getEndLeft(), candidate.getEndRight()));
const double fMax(std::max(candidate.getEndLeft(), candidate.getEndRight()));
basegfx::B2DPolygon aPolygon;
// create a triangle with min/max values for LineEnd and add
if(rtl::math::approxEqual(candidate.getEndLeft(), fMax))
{
aPolygon.append(aEnd - aHalfLineOffset + (aVector * candidate.getEndLeft()));
}
if(rtl::math::approxEqual(candidate.getEndRight(), fMax))
{
aPolygon.append(aEnd + aHalfLineOffset + (aVector * candidate.getEndRight()));
}
aPolygon.append(aEnd + aHalfLineOffset + (aVector * fMin));
aPolygon.append(aEnd - aHalfLineOffset + (aVector * fMin));
rContainer.push_back(
new PolyPolygonColorPrimitive2D(
basegfx::B2DPolyPolygon(aPolygon),
candidate.getLineAttribute().getColor()));
// Adapt StrokeEnd accordingly
aStrokeEnd = aEnd + (aVector * fMin);
}
addPolygonStrokePrimitive2D(
rContainer,
aStrokeStart,
aStrokeEnd,
candidate.getLineAttribute(),
getStrokeAttribute());
}
}
}
fOffset += fWidth;
}
}
bool BorderLinePrimitive2D::isHorizontalOrVertical(const geometry::ViewInformation2D& rViewInformation) const
{
if (!getStart().equal(getEnd()))
{
const basegfx::B2DHomMatrix& rOTVT = rViewInformation.getObjectToViewTransformation();
const basegfx::B2DVector aVector(rOTVT * getEnd() - rOTVT * getStart());
return basegfx::fTools::equalZero(aVector.getX()) || basegfx::fTools::equalZero(aVector.getY());
}
return false;
}
BorderLinePrimitive2D::BorderLinePrimitive2D(
const basegfx::B2DPoint& rStart,
const basegfx::B2DPoint& rEnd,
const std::vector< BorderLine >& rBorderLines,
const drawinglayer::attribute::StrokeAttribute& rStrokeAttribute)
: BufferedDecompositionPrimitive2D(),
maStart(rStart),
maEnd(rEnd),
maBorderLines(rBorderLines),
maStrokeAttribute(rStrokeAttribute)
{
}
bool BorderLinePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
{
if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
{
const BorderLinePrimitive2D& rCompare = static_cast<const BorderLinePrimitive2D&>(rPrimitive);
if (getStart() == rCompare.getStart()
&& getEnd() == rCompare.getEnd()
&& getStrokeAttribute() == rCompare.getStrokeAttribute())
{
if (getBorderLines().size() == rCompare.getBorderLines().size())
{
for (size_t a(0); a < getBorderLines().size(); a++)
{
if (!(getBorderLines()[a] == rCompare.getBorderLines()[a]))
{
return false;
}
}
}
}
}
return false;
}
// provide unique ID
ImplPrimitive2DIDBlock(BorderLinePrimitive2D, PRIMITIVE2D_ID_BORDERLINEPRIMITIVE2D)
Primitive2DReference tryMergeBorderLinePrimitive2D(
const BorderLinePrimitive2D* pCandidateA,
const BorderLinePrimitive2D* pCandidateB)
{
assert(pCandidateA);
assert(pCandidateB);
// start of candidate has to match end of this
if(!pCandidateA->getEnd().equal(pCandidateB->getStart()))
{
return Primitive2DReference();
}
// candidate A needs a length
if(pCandidateA->getStart().equal(pCandidateA->getEnd()))
{
return Primitive2DReference();
}
// candidate B needs a length
if(pCandidateB->getStart().equal(pCandidateB->getEnd()))
{
return Primitive2DReference();
}
// StrokeAttribute has to be equal
if(!(pCandidateA->getStrokeAttribute() == pCandidateB->getStrokeAttribute()))
{
return Primitive2DReference();
}
// direction has to be equal -> cross product == 0.0
const basegfx::B2DVector aVT(pCandidateA->getEnd() - pCandidateA->getStart());
const basegfx::B2DVector aVC(pCandidateB->getEnd() - pCandidateB->getStart());
if(!rtl::math::approxEqual(0.0, aVC.cross(aVT)))
{
return Primitive2DReference();
}
// number BorderLines has to be equal
const size_t count(pCandidateA->getBorderLines().size());
if(count != pCandidateB->getBorderLines().size())
{
return Primitive2DReference();
}
for(size_t a(0); a < count; a++)
{
const BorderLine& rBT(pCandidateA->getBorderLines()[a]);
const BorderLine& rBC(pCandidateB->getBorderLines()[a]);
// LineAttribute has to be the same
if(!(rBC.getLineAttribute() == rBT.getLineAttribute()))
{
return Primitive2DReference();
}
// isGap has to be the same
if(rBC.isGap() != rBT.isGap())
{
return Primitive2DReference();
}
if(rBT.isGap())
{
// when gap, width has to be equal
if(!rtl::math::approxEqual(rBT.getLineAttribute().getWidth(), rBC.getLineAttribute().getWidth()))
{
return Primitive2DReference();
}
}
else
{
// when not gap, the line extends have at least reach to the center ( > 0.0),
// else there is an extend usage. When > 0.0 they just overlap, no problem
if(rBT.getEndLeft() >= 0.0
&& rBT.getEndRight() >= 0.0
&& rBC.getStartLeft() >= 0.0
&& rBC.getStartRight() >= 0.0)
{
// okay
}
else
{
return Primitive2DReference();
}
}
}
// all conditions met, create merged primitive
std::vector< BorderLine > aMergedBorderLines;
for(size_t a(0); a < count; a++)
{
const BorderLine& rBT(pCandidateA->getBorderLines()[a]);
const BorderLine& rBC(pCandidateB->getBorderLines()[a]);
if(rBT.isGap())
{
aMergedBorderLines.push_back(rBT);
}
else
{
aMergedBorderLines.push_back(
BorderLine(
rBT.getLineAttribute(),
rBT.getStartLeft(), rBT.getStartRight(),
rBC.getEndLeft(), rBC.getEndRight()));
}
}
return Primitive2DReference(
new BorderLinePrimitive2D(
pCandidateA->getStart(),
pCandidateB->getEnd(),
aMergedBorderLines,
pCandidateA->getStrokeAttribute()));
}
} // end of namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|