lyx_mirror/src/mathed/math_xdata.C

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#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "math_scriptinset.h"
#include "math_support.h"
#include "Painter.h"
#include "debug.h"
extern MathScriptInset const * asScript(MathArray::const_iterator it);
MathXArray::MathXArray()
: width_(0), ascent_(0), descent_(0), xo_(0), yo_(0), size_()
{}
void MathXArray::metrics(MathMetricsInfo const & mi) const
{
size_ = mi;
mathed_char_dim(LM_TC_VAR, mi, 'I', ascent_, descent_, width_);
if (data_.empty())
return;
math_font_max_dim(LM_TC_TEXTRM, mi, ascent_, descent_);
width_ = 0;
//lyxerr << "MathXArray::metrics(): '" << data_ << "'\n";
for (const_iterator it = begin(); it != end(); ++it) {
MathInset const * p = it->nucleus();
MathScriptInset const * q = (it + 1 == end()) ? 0 : asScript(it);
if (q) {
q->metrics(p, mi);
ascent_ = std::max(ascent_, q->ascent(p));
descent_ = std::max(descent_, q->descent(p));
width_ += q->width(p);
++it;
} else {
p->metrics(mi);
ascent_ = std::max(ascent_, p->ascent());
descent_ = std::max(descent_, p->descent());
width_ += p->width();
}
}
//lyxerr << "MathXArray::metrics(): '" << ascent_ << " "
// << descent_ << " " << width_ << "'\n";
}
void MathXArray::draw(Painter & pain, int x, int y) const
{
xo_ = x;
yo_ = y;
if (data_.empty()) {
pain.rectangle(x, y - ascent_, width_, height(), LColor::mathline);
return;
}
for (const_iterator it = begin(); it != end(); ++it) {
MathInset const * p = it->nucleus();
MathScriptInset const * q = (it + 1 == end()) ? 0 : asScript(it);
if (q) {
q->draw(p, pain, x, y);
x += q->width(p);
++it;
} else {
p->draw(pain, x, y);
x += p->width();
}
}
}
int MathXArray::pos2x(size_type targetpos) const
{
int x = 0;
const_iterator target = std::min(begin() + targetpos, end());
for (const_iterator it = begin(); it < target; ++it) {
MathInset const * p = it->nucleus();
MathScriptInset const * q = (it + 1 == end()) ? 0 : asScript(it);
if (q) {
++it;
if (it < target)
x += q->width(p);
else // "half" position
x += q->dxx(p) + q->nwid(p);
} else
x += p->width();
}
return x;
}
MathArray::size_type MathXArray::x2pos(int targetx) const
{
const_iterator it = begin();
int lastx = 0;
int currx = 0;
for ( ; currx < targetx && it < end(); ++it) {
lastx = currx;
int wid = 0;
MathInset const * p = it->nucleus();
MathScriptInset const * q = 0;
if (it + 1 != end())
q = asScript(it);
if (q) {
wid = q->width(p);
++it;
} else
wid = p->width();
currx += wid;
}
if (abs(lastx - targetx) < abs(currx - targetx) && it != begin())
--it;
return it - begin();
}