lyx_mirror/src/mathed/math_rootinset.C

102 lines
2.2 KiB
C++
Raw Normal View History

/*
* File: math_root.C
* Purpose: Implementation of the root object
* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
* Created: January 1999
* Description: Root math object
*
* Copyright: 1999 Alejandro Aguilar Sierra
*
* You are free to use and modify this code under the terms of
* the GNU General Public Licence version 2 or later.
*/
#ifdef __GNUG__
#pragma implementation
#endif
#include "math_rootinset.h"
#include "math_mathmlstream.h"
#include "frontends/Painter.h"
using std::max;
MathRootInset::MathRootInset()
: MathNestInset(2)
{}
MathInset * MathRootInset::clone() const
{
return new MathRootInset(*this);
}
void MathRootInset::metrics(MathMetricsInfo & mi) const
{
MathNestInset::metrics(mi);
dim_.a = max(cell(0).ascent() + 5, cell(1).ascent()) + 2;
dim_.d = max(cell(1).descent() + 5, cell(0).descent()) + 2;
dim_.w = cell(0).width() + cell(1).width() + 10;
metricsMarkers();
}
void MathRootInset::draw(MathPainterInfo & pi, int x, int y) const
{
int const w = cell(0).width();
// the "exponent"
cell(0).draw(pi, x, y - 5 - cell(0).descent());
// the "base"
cell(1).draw(pi, x + w + 8, y);
int const a = ascent();
int const d = descent();
int xp[5];
int yp[5];
xp[0] = x + width(); yp[0] = y - a + 1;
xp[1] = x + w + 4; yp[1] = y - a + 1;
xp[2] = x + w; yp[2] = y + d;
xp[3] = x + w - 2; yp[3] = y + (d - a)/2 + 2;
//xp[4] = x; yp[4] = y + (d - a)/2 + 2;
xp[4] = x + w - 5; yp[4] = y + (d - a)/2 + 4;
pi.pain.lines(xp, yp, 5, LColor::math);
drawMarkers(pi, x, y);
}
void MathRootInset::write(WriteStream & os) const
{
os << "\\sqrt[" << cell(0) << "]{" << cell(1) << '}';
}
void MathRootInset::normalize(NormalStream & os) const
{
os << "[root " << cell(0) << ' ' << cell(1) << ']';
}
bool MathRootInset::idxUpDown(idx_type & idx, pos_type & pos, bool up, int) const
{
bool target = !up; // up ? 0 : 1;
if (idx == target)
return false;
idx = target;
pos = target ? 0 : cell(0).size();
return true;
}
void MathRootInset::octavize(OctaveStream & os) const
{
os << "root(" << cell(1) << ',' << cell(0) <<')';
}
void MathRootInset::mathmlize(MathMLStream & os) const
{
os << MTag("mroot") << cell(1) << cell(0) << ETag("mroot");
}