lyx_mirror/src/mathed/xarray.C

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#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "xarray.h"
#include "math_inset.h"
#include "mathed/support.h"
#include "math_defs.h"
#include "Painter.h"
using std::max;
using std::min;
MathXArray::MathXArray()
: width_(0), ascent_(0), descent_(0), xo_(0), yo_(0), style_(LM_ST_TEXT)
{}
void MathXArray::Metrics(MathStyles st)
{
if (data_.empty()) {
mathed_char_dim(LM_TC_VAR, st, 'I', ascent_, descent_, width_);
return;
}
ascent_ = 0;
descent_ = 0;
width_ = 0;
style_ = st;
for (int pos = 0; pos < data_.size(); data_.next(pos)) {
int asc;
int des;
int wid;
MathInset * p = data_.nextInset(pos);
if (p) {
p->Metrics(st);
asc = p->ascent();
des = p->descent();
wid = p->width();
} else {
char cx = data_.GetChar(pos);
MathTextCodes fc = data_.GetCode(pos);
mathed_char_dim(fc, style_, cx, asc, des, wid);
}
ascent_ = max(ascent_, asc);
descent_ = max(descent_, des);
width_ += wid;
}
}
void MathXArray::draw(Painter & pain, int x, int y)
{
xo_ = x;
yo_ = y;
if (data_.empty()) {
pain.rectangle(x, y - ascent_, width_, height(), LColor::mathline);
return;
}
for (int pos = 0; pos < data_.size(); data_.next(pos)) {
MathInset * p = data_.nextInset(pos);
if (p) {
p->draw(pain, x, y);
x += p->width();
} else {
char cx = data_.GetChar(pos);
MathTextCodes fc = data_.GetCode(pos);
string s;
s += cx;
drawStr(pain, fc, style_, x, y, s);
x += mathed_char_width(fc, style_, cx);
}
}
}
int MathXArray::pos2x(int targetpos) const
{
int x = 0;
targetpos = min(targetpos, data_.size());
for (int pos = 0; pos < targetpos; data_.next(pos))
x += width(pos);
return x;
}
int MathXArray::x2pos(int targetx) const
{
int pos = 0;
int lastx = 0;
int currx = 0;
while (currx < targetx && pos < data_.size()) {
lastx = currx;
currx += width(pos);
data_.next(pos);
}
if (abs(lastx - targetx) < abs(currx - targetx))
data_.prev(pos);
return pos;
}
int MathXArray::width(int pos) const
{
if (pos >= data_.size())
return 0;
if (data_.isInset(pos))
return data_.nextInset(pos)->width();
else
return mathed_char_width(data_.GetCode(pos), style_, data_.GetChar(pos));
}
std::ostream & operator<<(std::ostream & os, MathXArray const & ar)
{
os << ar.data_;
return os;
}