lyx_mirror/src/mathed/InsetMathChar.cpp

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/**
* \file InsetMathChar.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Alejandro Aguilar Sierra
* \author Andr<EFBFBD> P<EFBFBD>nitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "InsetMathChar.h"
#include "MathSupport.h"
#include "MathStream.h"
#include "debug.h"
#include "dimension.h"
#include "support/lstrings.h"
#include "TextPainter.h"
#include "frontends/FontMetrics.h"
namespace lyx {
using std::auto_ptr;
extern bool has_math_fonts;
namespace {
bool isBinaryOp(char_type c)
{
return support::contains("+-<>=/*", static_cast<char>(c));
}
bool slanted(char_type c)
{
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
}
}
InsetMathChar::InsetMathChar(char_type c)
: char_(c), kerning_(0)
{}
auto_ptr<InsetBase> InsetMathChar::doClone() const
{
return auto_ptr<InsetBase>(new InsetMathChar(*this));
}
bool InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
{
if (mi.base.font == font_cache_) {
dim = dim_;
return false;
}
font_cache_ = mi.base.font;
#if 1
if (char_ == '=' && has_math_fonts) {
FontSetChanger dummy(mi.base, "cmr");
dim = theFontMetrics(mi.base.font).dimension(char_);
} else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
FontSetChanger dummy(mi.base, "cmm");
dim = theFontMetrics(mi.base.font).dimension(char_);
} else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
ShapeChanger dummy(mi.base.font, LyXFont::UP_SHAPE);
dim = theFontMetrics(mi.base.font).dimension(char_);
} else {
frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
dim = fm.dimension(char_);
kerning_ = fm.rbearing(char_) - dim.wid;
}
int const em = mathed_char_width(mi.base.font, 'M');
if (isBinaryOp(char_))
dim.wid += static_cast<int>(0.5*em+0.5);
else if (char_ == '\'')
dim.wid += static_cast<int>(0.1667*em+0.5);
#else
whichFont(font_, code_, mi);
dim = theFontMetrics(font_).dimension(char_);
if (isBinaryOp(char_, code_))
dim.wid += 2 * theFontMetrics(font_).width(' ');
lyxerr << "InsetMathChar::metrics: " << dim << endl;
#endif
dim_ = dim;
return true;
}
void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
{
//lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
int const em = mathed_char_width(pi.base.font, 'M');
if (isBinaryOp(char_))
x += static_cast<int>(0.25*em+0.5);
else if (char_ == '\'')
x += static_cast<int>(0.0833*em+0.5);
#if 1
if (char_ == '=' && has_math_fonts) {
FontSetChanger dummy(pi.base, "cmr");
pi.draw(x, y, char_);
} else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
FontSetChanger dummy(pi.base, "cmm");
pi.draw(x, y, char_);
} else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
ShapeChanger dummy(pi.base.font, LyXFont::UP_SHAPE);
pi.draw(x, y, char_);
} else {
pi.draw(x, y, char_);
}
#else
drawChar(pain, font_, x, y, char_);
#endif
}
void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
{
dim.wid = 1;
dim.asc = 1;
dim.des = 0;
}
void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
{
//lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
pain.draw(x, y, char_);
}
void InsetMathChar::write(WriteStream & os) const
{
os.os().put(char_);
}
void InsetMathChar::normalize(NormalStream & os) const
{
os << "[char ";
os.os().put(char_);
os << " mathalpha]";
}
void InsetMathChar::octave(OctaveStream & os) const
{
os.os().put(char_);
}
void InsetMathChar::mathmlize(MathStream & ms) const
{
switch (char_) {
case '<': ms << "&lt;"; break;
case '>': ms << "&gt;"; break;
case '&': ms << "&amp;"; break;
default: ms.os().put(char_); break;
}
}
bool InsetMathChar::isRelOp() const
{
return char_ == '=' || char_ == '<' || char_ == '>';
}
} // namespace lyx