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129 lines
2.7 KiB
C++
129 lines
2.7 KiB
C++
/**
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* \file InsetMathCancelto.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Uwe Stöhr
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "InsetMathCancelto.h"
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#include "MathData.h"
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#include "MathStream.h"
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#include "Cursor.h"
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#include "LaTeXFeatures.h"
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#include "MetricsInfo.h"
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#include "frontends/Painter.h"
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#include <ostream>
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using namespace std;
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namespace lyx {
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InsetMathCancelto::InsetMathCancelto(Buffer * buf)
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: InsetMathNest(buf, 2)
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{}
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Inset * InsetMathCancelto::clone() const
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{
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return new InsetMathCancelto(*this);
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}
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void InsetMathCancelto::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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InsetMathNest::metrics(mi);
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Dimension const & dim0 = cell(0).dimension(*mi.base.bv);
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Dimension const & dim1 = cell(1).dimension(*mi.base.bv);
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dim.asc = max(dim0.ascent() + 2, dim0.ascent() + dim1.ascent()) + 2 + 8;
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dim.des = max(dim0.descent() - 2, dim1.descent()) + 2;
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dim.wid = dim0.width() + dim1.width() + 10;
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metricsMarkers(dim);
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}
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void InsetMathCancelto::draw(PainterInfo & pi, int x, int y) const
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{
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ColorCode const origcol = pi.base.font.color();
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// We first draw the text and then an arrow
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Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
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cell(0).draw(pi, x + 1, y);
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cell(1).draw(pi, x + dim0.wid + 2 + 8, y - dim0.asc - 8);
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//Dimension const dim = dimension(*pi.base.bv);
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// y3____ ___
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// /|
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// y2_ / |
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// /
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// /
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// /
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// /
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// y1 / | |
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// x1 x2 x3
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int const x2 = x + dim0.wid;
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int const x3 = x2 + 8;
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int const x1 = x;
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int const y1 = y + dim0.des;
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int const y2 = y - dim0.asc;
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int const y3 = y2 - 8;
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// the main line
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pi.pain.line(x3, y3, x1, y1, origcol);
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// the arrow bars
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pi.pain.line(x3, y3, x2 + 2, y3, origcol);
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pi.pain.line(x3, y3, x3 - 2, y2 - 2, origcol);
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drawMarkers(pi, x, y);
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}
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void InsetMathCancelto::write(WriteStream & os) const
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{
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MathEnsurer ensurer(os);
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os << "\\cancelto{" << cell(1) << "}{" << cell(0) << '}';
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}
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void InsetMathCancelto::normalize(NormalStream & os) const
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{
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os << "[cancelto " << cell(1) << ' ' << cell(0) << ']';
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}
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bool InsetMathCancelto::idxUpDown(Cursor & cur, bool up) const
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{
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Cursor::idx_type const target = up ? 1 : 0;
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if (cur.idx() == target)
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return false;
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cur.idx() = target;
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cur.pos() = up ? cur.lastpos() : 0;
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return true;
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}
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void InsetMathCancelto::infoize(odocstream & os) const
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{
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os << "Cancelto";
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}
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void InsetMathCancelto::validate(LaTeXFeatures & features) const
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{
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InsetMathNest::validate(features);
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if (features.runparams().isLaTeX())
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features.require("cancel");
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InsetMathNest::validate(features);
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}
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} // namespace lyx
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