lyx_mirror/src/mathed/math_symbolinset.C

#include "math_symbolinset.h"
#include "math_parser.h"
#include "debug.h"
#include "support.h"
#include "support/LOstream.h"


using std::ostream;

MathSymbolInset::MathSymbolInset(const latexkeys * l)
	: sym_(l), h_(0)
{}


MathInset * MathSymbolInset::clone() const
{
	return new MathSymbolInset(*this);
}


void MathSymbolInset::write(MathWriteInfo & os) const
{
	os << '\\' << sym_->name << ' ';
}


void MathSymbolInset::writeNormal(ostream & os) const
{
	os << "[symbol " << sym_->name << "]";
}


MathTextCodes MathSymbolInset::code() const
{
	switch(sym_->token) {
	case LM_TK_CMR:
		return LM_TC_CMR;
	case LM_TK_CMSY:
		return LM_TC_CMSY;
	case LM_TK_CMM:
		return LM_TC_CMM;
	case LM_TK_CMEX:
		return LM_TC_CMEX;
	case LM_TK_MSA:
		return LM_TC_MSA;
	case LM_TK_MSB:
		return LM_TC_MSB;
	default:
		return LM_TC_SYMB;
	}
}


MathTextCodes MathSymbolInset::code2() const
{
	if (sym_->token == LM_TK_CMEX)
		return LM_TC_BOLDSYMB;
	else
		return LM_TC_SYMB;
}


void MathSymbolInset::metrics(MathMetricsInfo const & mi) const
{
	mi_ = mi;
	MathTextCodes c = code();
	if (sym_->latex_font_id > 0 && math_font_available(c)) {
		mathed_char_dim(c, mi_, sym_->latex_font_id, ascent_, descent_, width_);
		if (c == LM_TC_CMEX) {
			h_ = 4 * descent_ / 5;
			ascent_  += h_;
			descent_ -= h_;
		}
	} else {
		if (sym_->id > 0 && sym_->id < 255 && math_font_available(LM_TC_SYMB))
			mathed_char_dim(code2(), mi_, sym_->id, ascent_, descent_, width_);
		else
			mathed_string_dim(LM_TC_TEX, mi_, sym_->name, ascent_, descent_, width_);
	}
	if (isRelOp())
		width_ +=  mathed_char_width(LM_TC_TEX, mi_, 'I');
}


void MathSymbolInset::draw(Painter & pain, int x, int y) const
{  
	if (isRelOp())
		x += mathed_char_width(LM_TC_TEX, mi_, 'I') / 2;
	MathTextCodes Code = code();
	if (sym_->latex_font_id > 0 && math_font_available(Code))
		drawChar(pain, Code, mi_, x, y - h_, sym_->latex_font_id);
	else if (sym_->id > 0 && sym_->id < 255 && math_font_available(LM_TC_SYMB))
		drawChar(pain, code2(), mi_, x, y, sym_->id);
	else
		drawStr(pain, LM_TC_TEX, mi_, x, y, sym_->name);
}


bool MathSymbolInset::isRelOp() const
{	
	return sym_->type == LMB_RELATION;
}


bool MathSymbolInset::isScriptable() const
{
	return mi_.style == LM_ST_DISPLAY && sym_->token == LM_TK_CMEX;
}


bool MathSymbolInset::takesLimits() const
{
	return sym_->token == LM_TK_CMEX;
}