lyx_mirror/src/mathed/InsetMathUnderset.C

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/**
* \file InsetMathUnderset.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Andr<EFBFBD> P<EFBFBD>nitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "InsetMathUnderset.h"
#include "MathData.h"
#include "MathStream.h"
#include "cursor.h"
#include "LaTeXFeatures.h"
namespace lyx {
using std::max;
using std::auto_ptr;
auto_ptr<InsetBase> InsetMathUnderset::doClone() const
{
return auto_ptr<InsetBase>(new InsetMathUnderset(*this));
}
bool InsetMathUnderset::metrics(MetricsInfo & mi, Dimension & dim) const
{
cell(1).metrics(mi);
FracChanger dummy(mi.base);
cell(0).metrics(mi);
dim.wid = max(cell(0).width(), cell(1).width()) + 4;
dim.asc = cell(1).ascent();
dim.des = cell(1).descent() + cell(0).height() + 4;
metricsMarkers(dim);
if (dim_ == dim)
return false;
dim_ = dim;
return true;
}
void InsetMathUnderset::draw(PainterInfo & pi, int x, int y) const
{
int m = x + width() / 2;
int yo = y + cell(1).descent() + cell(0).ascent() + 1;
cell(1).draw(pi, m - cell(1).width() / 2, y);
FracChanger dummy(pi.base);
cell(0).draw(pi, m - cell(0).width() / 2, yo);
drawMarkers(pi, x, y);
}
bool InsetMathUnderset::idxFirst(LCursor & cur) const
{
cur.idx() = 1;
cur.pos() = 0;
return true;
}
bool InsetMathUnderset::idxLast(LCursor & cur) const
{
cur.idx() = 1;
cur.pos() = cur.lastpos();
return true;
}
bool InsetMathUnderset::idxUpDown(LCursor & cur, bool up) const
{
idx_type target = up; // up ? 1 : 0, since upper cell has idx 1
if (cur.idx() == target)
return false;
cur.idx() = target;
cur.pos() = cur.cell().x2pos(cur.x_target());
return true;
}
void InsetMathUnderset::write(WriteStream & os) const
{
os << "\\underset{" << cell(0) << "}{" << cell(1) << '}';
}
void InsetMathUnderset::normalize(NormalStream & os) const
{
os << "[underset " << cell(0) << ' ' << cell(1) << ']';
}
void InsetMathUnderset::validate(LaTeXFeatures & features) const
{
features.require("amsmath");
InsetMathNest::validate(features);
}
} // namespace lyx