lyx_mirror/src/mathed/math_support.C
André Pönitz f6242f0e5c Give symbols a "neutral" color, so there are black in text and blue in math.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5803 a592a061-630c-0410-9148-cb99ea01b6c8
2002-12-11 06:45:19 +00:00

656 lines
15 KiB
C

#ifdef __GNUG__
#pragma implementation
#endif
#include <config.h>
#include "math_support.h"
#include "lyxfont.h"
#include "math_cursor.h"
#include "math_inset.h"
#include "math_parser.h"
#include "math_metricsinfo.h"
#include "frontends/Painter.h"
#include "frontends/font_metrics.h"
#include "frontends/lyx_gui.h"
#include "debug.h"
#include "commandtags.h"
#include "dimension.h"
#include <map>
using std::max;
///
class Matrix {
public:
///
Matrix(int, double, double);
///
void transform(double &, double &);
private:
///
double m_[2][2];
};
Matrix::Matrix(int code, double x, double y)
{
double const cs = (code & 1) ? 0 : (1 - code);
double const sn = (code & 1) ? (2 - code) : 0;
m_[0][0] = cs * x;
m_[0][1] = sn * x;
m_[1][0] = -sn * y;
m_[1][1] = cs * y;
}
void Matrix::transform(double & x, double & y)
{
double xx = m_[0][0] * x + m_[0][1] * y;
double yy = m_[1][0] * x + m_[1][1] * y;
x = xx;
y = yy;
}
namespace {
/*
* Internal struct of a drawing: code n x1 y1 ... xn yn, where code is:
* 0 = end, 1 = line, 2 = polyline, 3 = square line, 4 = square polyline
*/
double const parenthHigh[] = {
2, 13,
0.9840, 0.0014, 0.7143, 0.0323, 0.4603, 0.0772,
0.2540, 0.1278, 0.1746, 0.1966, 0.0952, 0.3300,
0.0950, 0.5000, 0.0952, 0.6700, 0.1746, 0.8034,
0.2540, 0.8722, 0.4603, 0.9228, 0.7143, 0.9677,
0.9840, 0.9986,
0
};
double const parenth[] = {
2, 13,
0.9930, 0.0071, 0.7324, 0.0578, 0.5141, 0.1126,
0.3380, 0.1714, 0.2183, 0.2333, 0.0634, 0.3621,
0.0141, 0.5000, 0.0563, 0.6369, 0.2113, 0.7647,
0.3310, 0.8276, 0.5070, 0.8864, 0.7254, 0.9412,
0.9930, 0.9919,
0
};
double const brace[] = {
2, 21,
0.9492, 0.0020, 0.9379, 0.0020, 0.7458, 0.0243,
0.5819, 0.0527, 0.4859, 0.0892, 0.4463, 0.1278,
0.4463, 0.3732, 0.4011, 0.4199, 0.2712, 0.4615,
0.0734, 0.4919, 0.0113, 0.5000, 0.0734, 0.5081,
0.2712, 0.5385, 0.4011, 0.5801, 0.4463, 0.6268,
0.4463, 0.8722, 0.4859, 0.9108, 0.5819, 0.9473,
0.7458, 0.9757, 0.9379, 0.9980, 0.9492, 0.9980,
0
};
double const arrow[] = {
4, 7,
0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
0.9500, 0.7500,
3, 0.5000, 0.1500, 0.5000, 0.9500,
0
};
double const Arrow[] = {
4, 7,
0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
0.9500, 0.7500,
3, 0.3500, 0.5000, 0.3500, 0.9500,
3, 0.6500, 0.5000, 0.6500, 0.9500,
0
};
double const udarrow[] = {
2, 3,
0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
2, 3,
0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
1, 0.5, 0.2, 0.5, 0.8,
0
};
double const Udarrow[] = {
2, 3,
0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
2, 3,
0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
1, 0.35, 0.2, 0.35, 0.8,
1, 0.65, 0.2, 0.65, 0.8,
0
};
double const brack[] = {
2, 4,
0.95, 0.05, 0.05, 0.05, 0.05, 0.95, 0.95, 0.95,
0
};
double const corner[] = {
2, 3,
0.95, 0.05, 0.05, 0.05, 0.05, 0.95,
0
};
double const angle[] = {
2, 3,
1, 0, 0.05, 0.5, 1, 1,
0
};
double const slash[] = {
1, 0.95, 0.05, 0.05, 0.95,
0
};
double const hline[] = {
1, 0.00, 0.5, 1.0, 0.5,
0
};
double const ddot[] = {
1, 0.2, 0.5, 0.3, 0.5,
1, 0.7, 0.5, 0.8, 0.5,
0
};
double const dddot[] = {
1, 0.1, 0.5, 0.2, 0.5,
1, 0.45, 0.5, 0.55, 0.5,
1, 0.8, 0.5, 0.9, 0.5,
0
};
double const hline3[] = {
1, 0.1, 0, 0.15, 0,
1, 0.475, 0, 0.525, 0,
1, 0.85, 0, 0.9, 0,
0
};
double const dline3[] = {
1, 0.1, 0.1, 0.15, 0.15,
1, 0.475, 0.475, 0.525, 0.525,
1, 0.85, 0.85, 0.9, 0.9,
0
};
double const hlinesmall[] = {
1, 0.4, 0.5, 0.6, 0.5,
0
};
double const ring[] = {
2, 5,
0.5, 0.8, 0.8, 0.5, 0.5, 0.2, 0.2, 0.5, 0.5, 0.8,
0
};
double const vert[] = {
1, 0.5, 0.05, 0.5, 0.95,
0
};
double const Vert[] = {
1, 0.3, 0.05, 0.3, 0.95,
1, 0.7, 0.05, 0.7, 0.95,
0
};
double const tilde[] = {
2, 4,
0.00, 0.8, 0.25, 0.2, 0.75, 0.8, 1.00, 0.2,
0
};
struct deco_struct {
double const * data;
int angle;
};
struct named_deco_struct {
char const * name;
double const * data;
int angle;
};
named_deco_struct deco_table[] = {
// Decorations
{"widehat", angle, 3 },
{"widetilde", tilde, 0 },
{"underbar", hline, 0 },
{"underline", hline, 0 },
{"overline", hline, 0 },
{"underbrace", brace, 1 },
{"overbrace", brace, 3 },
{"overleftarrow", arrow, 1 },
{"overrightarrow", arrow, 3 },
{"overleftrightarrow", udarrow, 1 },
{"xleftarrow", arrow, 1 },
{"xrightarrow", arrow, 3 },
{"underleftarrow", arrow, 1 },
{"underrightarrow", arrow, 3 },
{"underleftrightarrow", udarrow, 1 },
// Delimiters
{"(", parenth, 0 },
{")", parenth, 2 },
{"{", brace, 0 },
{"}", brace, 2 },
{"[", brack, 0 },
{"]", brack, 2 },
{"|", vert, 0 },
{"/", slash, 0 },
{"vert", vert, 0 },
{"Vert", Vert, 0 },
{"'", slash, 1 },
{"backslash", slash, 1 },
{"langle", angle, 0 },
{"lceil", corner, 0 },
{"lfloor", corner, 1 },
{"rangle", angle, 2 },
{"rceil", corner, 3 },
{"rfloor", corner, 2 },
{"downarrow", arrow, 2 },
{"Downarrow", Arrow, 2 },
{"uparrow", arrow, 0 },
{"Uparrow", Arrow, 0 },
{"updownarrow", udarrow, 0 },
{"Updownarrow", Udarrow, 0 },
// Accents
{"ddot", ddot, 0 },
{"dddot", dddot, 0 },
{"hat", angle, 3 },
{"grave", slash, 1 },
{"acute", slash, 0 },
{"tilde", tilde, 0 },
{"bar", hline, 0 },
{"dot", hlinesmall, 0 },
{"check", angle, 1 },
{"breve", parenth, 1 },
{"vec", arrow, 3 },
{"mathring", ring, 0 },
// Dots
{"dots", hline3, 0 },
{"ldots", hline3, 0 },
{"cdots", hline3, 0 },
{"vdots", hline3, 1 },
{"ddots", dline3, 0 },
{"dotsb", hline3, 0 },
{"dotsc", hline3, 0 },
{"dotsi", hline3, 0 },
{"dotsm", hline3, 0 },
{"dotso", hline3, 0 }
};
std::map<string, deco_struct> deco_list;
// sort the table on startup
struct init_deco_table {
init_deco_table() {
unsigned const n = sizeof(deco_table) / sizeof(deco_table[0]);
for (named_deco_struct * p = deco_table; p != deco_table + n; ++p) {
deco_struct d;
d.data = p->data;
d.angle = p->angle;
deco_list[p->name]= d;
}
}
};
static init_deco_table dummy;
deco_struct const * search_deco(string const & name)
{
std::map<string, deco_struct>::const_iterator p = deco_list.find(name);
return (p == deco_list.end()) ? 0 : &(p->second);
}
} // namespace anon
void mathed_char_dim(LyXFont const & font, unsigned char c, Dimension & dim)
{
dim.d = font_metrics::descent(c, font);
dim.a = font_metrics::ascent(c, font);
dim.w = mathed_char_width(font, c);
}
int mathed_char_ascent(LyXFont const & font, unsigned char c)
{
return font_metrics::ascent(c, font);
}
int mathed_char_descent(LyXFont const & font, unsigned char c)
{
return font_metrics::descent(c, font);
}
int mathed_char_width(LyXFont const & font, unsigned char c)
{
return font_metrics::width(c, font);
}
void mathed_string_dim(LyXFont const & font, string const & s, Dimension & dim)
{
#if 1
dim.a = 0;
dim.d = 0;
for (string::const_iterator it = s.begin(); it != s.end(); ++it) {
dim.a = max(dim.a, font_metrics::ascent(*it, font));
dim.d = max(dim.d, font_metrics::descent(*it, font));
}
#else
dim.a = font_metrics::maxAscent(font);
dim.d = font_metrics::maxDescent(font);
#endif
dim.w = font_metrics::width(s, font);
}
int mathed_string_width(LyXFont const & font, string const & s)
{
return font_metrics::width(s, font);
}
void mathed_draw_deco(MathPainterInfo & pi, int x, int y, int w, int h,
const string & name)
{
if (name == ".") {
pi.pain.line(x + w/2, y, x + w/2, y + h,
LColor::mathcursor, Painter::line_onoffdash);
return;
}
deco_struct const * mds = search_deco(name);
if (!mds) {
lyxerr << "Deco was not found. Programming error?\n";
lyxerr << "name: '" << name << "'\n";
return;
}
int const n = (w < h) ? w : h;
int const r = mds->angle;
double const * d = mds->data;
if (h > 70 && (name == "(" || name == ")"))
d = parenthHigh;
Matrix mt(r, w, h);
Matrix sqmt(r, n, n);
if (r > 0 && r < 3)
y += h;
if (r >= 2)
x += w;
for (int i = 0; d[i]; ) {
int code = int(d[i++]);
if (code & 1) { // code == 1 || code == 3
double xx = d[i++];
double yy = d[i++];
double x2 = d[i++];
double y2 = d[i++];
if (code == 3)
sqmt.transform(xx, yy);
else
mt.transform(xx, yy);
mt.transform(x2, y2);
pi.pain.line(
int(x + xx + 0.5), int(y + yy + 0.5),
int(x + x2 + 0.5), int(y + y2 + 0.5),
LColor::math);
} else {
int xp[32];
int yp[32];
int const n = int(d[i++]);
for (int j = 0; j < n; ++j) {
double xx = d[i++];
double yy = d[i++];
// lyxerr << ' ' << xx << ' ' << yy << ' ';
if (code == 4)
sqmt.transform(xx, yy);
else
mt.transform(xx, yy);
xp[j] = int(x + xx + 0.5);
yp[j] = int(y + yy + 0.5);
// lyxerr << "P[" << j ' ' << xx << ' ' << yy << ' ' << x << ' ' << y << ']';
}
pi.pain.lines(xp, yp, n, LColor::math);
}
}
}
void mathed_draw_framebox(MathPainterInfo & pi, int x, int y, MathInset const * p)
{
if (mathcursor && mathcursor->isInside(p))
pi.pain.rectangle(x, y - p->ascent(), p->width(), p->height(),
LColor::mathframe);
}
// In the future maybe we use a better fonts renderer
void drawStr(MathPainterInfo & pi, LyXFont const & font,
int x, int y, string const & str)
{
pi.pain.text(x, y, str, font);
}
void drawStrRed(MathPainterInfo & pi, int x, int y, string const & str)
{
LyXFont f = pi.base.font;
f.setColor(LColor::latex);
pi.pain.text(x, y, str, f);
}
void drawStrBlack(MathPainterInfo & pi, int x, int y, string const & str)
{
LyXFont f = pi.base.font;
f.setColor(LColor::black);
pi.pain.text(x, y, str, f);
}
void drawChar(MathPainterInfo & pi, LyXFont const & font, int x, int y, char c)
{
pi.pain.text(x, y, c, font);
}
void math_font_max_dim(LyXFont const & font, int & asc, int & des)
{
asc = font_metrics::maxAscent(font);
des = font_metrics::maxDescent(font);
}
struct fontinfo {
string cmd_;
LyXFont::FONT_FAMILY family_;
LyXFont::FONT_SERIES series_;
LyXFont::FONT_SHAPE shape_;
LColor::color color_;
};
LyXFont::FONT_FAMILY const inh_family = LyXFont::INHERIT_FAMILY;
LyXFont::FONT_SERIES const inh_series = LyXFont::INHERIT_SERIES;
LyXFont::FONT_SHAPE const inh_shape = LyXFont::INHERIT_SHAPE;
// mathnormal should be the first, otherwise the fallback further down
// does not work
fontinfo fontinfos[] = {
{"mathnormal",
inh_family, LyXFont::MEDIUM_SERIES, LyXFont::UP_SHAPE, LColor::math},
{"mathbf", inh_family, LyXFont::BOLD_SERIES, inh_shape, LColor::math},
{"mathcal",LyXFont::CMSY_FAMILY, inh_series, inh_shape, LColor::math},
{"mathfrak", LyXFont::EUFRAK_FAMILY, inh_series, inh_shape, LColor::math},
{"mathrm", LyXFont::ROMAN_FAMILY, inh_series, inh_shape, LColor::math},
{"mathsf", LyXFont::SANS_FAMILY, inh_series, inh_shape, LColor::math},
{"mathbb", LyXFont::MSB_FAMILY, inh_series, inh_shape, LColor::math},
{"cmex", LyXFont::CMEX_FAMILY, inh_series, inh_shape, LColor::none},
{"cmm", LyXFont::CMM_FAMILY, inh_series, inh_shape, LColor::none},
{"cmr", LyXFont::CMR_FAMILY, inh_series, inh_shape, LColor::none},
{"cmsy", LyXFont::CMSY_FAMILY, inh_series, inh_shape, LColor::none},
{"eufrak", LyXFont::EUFRAK_FAMILY, inh_series, inh_shape, LColor::none},
{"msa", LyXFont::MSA_FAMILY, inh_series, inh_shape, LColor::none},
{"msb", LyXFont::MSB_FAMILY, inh_series, inh_shape, LColor::none},
{"wasy", LyXFont::WASY_FAMILY, inh_series, inh_shape, LColor::none},
{"text", inh_family, inh_series, inh_shape, LColor::black},
{"textbf", inh_family, LyXFont::BOLD_SERIES, inh_shape, LColor::black},
{"textit", inh_family, inh_series, LyXFont::ITALIC_SHAPE, LColor::black},
{"textmd", inh_family, LyXFont::MEDIUM_SERIES, inh_shape, LColor::black},
{"textnormal", inh_family, inh_series, LyXFont::UP_SHAPE, LColor::black},
{"textrm", LyXFont::ROMAN_FAMILY, inh_series,LyXFont::UP_SHAPE,LColor::black},
{"textsc", inh_family, inh_series, LyXFont::SMALLCAPS_SHAPE, LColor::black},
{"textsf", LyXFont::SANS_FAMILY, inh_series, inh_shape, LColor::black},
{"textsl", inh_family, inh_series, LyXFont::SLANTED_SHAPE, LColor::black},
{"texttt", LyXFont::TYPEWRITER_FAMILY, inh_series, inh_shape, LColor::black},
{"textup", inh_family, inh_series, LyXFont::UP_SHAPE, LColor::black},
// TIPA support
{"textipa", inh_family, inh_series, inh_shape, LColor::black},
{"lyxtex", inh_family, inh_series, inh_shape, LColor::latex},
{"lyxert", LyXFont::TYPEWRITER_FAMILY, inh_series, inh_shape, LColor::latex},
{"lyxsymbol", LyXFont::SYMBOL_FAMILY, inh_series, inh_shape, LColor::math},
{"lyxboldsymbol",
LyXFont::SYMBOL_FAMILY, LyXFont::BOLD_SERIES, inh_shape, LColor::math},
{"lyxitsymbol", LyXFont::SYMBOL_FAMILY,
inh_series, LyXFont::ITALIC_SHAPE, LColor::math},
{"lyxblacktext", LyXFont::ROMAN_FAMILY,
LyXFont::MEDIUM_SERIES, LyXFont::UP_SHAPE, LColor::black},
{"lyxnochange", inh_family, inh_series, inh_shape, LColor::black},
{"lyxfakebb", LyXFont::TYPEWRITER_FAMILY, LyXFont::BOLD_SERIES,
LyXFont::UP_SHAPE, LColor::math},
{"lyxfakecal", LyXFont::SANS_FAMILY, LyXFont::MEDIUM_SERIES,
LyXFont::ITALIC_SHAPE, LColor::math},
{"lyxfakefrak", LyXFont::ROMAN_FAMILY, LyXFont::BOLD_SERIES,
LyXFont::ITALIC_SHAPE, LColor::math}
};
fontinfo * lookupFont(string const & name)
{
//lyxerr << "searching font '" << name << "'\n";
int const n = sizeof(fontinfos) / sizeof(fontinfo);
for (int i = 0; i < n; ++i)
if (fontinfos[i].cmd_ == name) {
//lyxerr << "found '" << i << "'\n";
return fontinfos + i;
}
return 0;
}
fontinfo * searchFont(string const & name)
{
fontinfo * f = lookupFont(name);
return f ? f : fontinfos;
// this should be mathnormal
//return searchFont("mathnormal");
}
bool isFontName(string const & name)
{
return lookupFont(name);
}
LyXFont getFont(string const & name)
{
LyXFont font;
augmentFont(font, name);
return font;
}
void fakeFont(string const & orig, string const & fake)
{
fontinfo * forig = searchFont(orig);
fontinfo * ffake = searchFont(fake);
if (forig && ffake) {
forig->family_ = ffake->family_;
forig->series_ = ffake->series_;
forig->shape_ = ffake->shape_;
forig->color_ = ffake->color_;
} else {
lyxerr << "Can't fake font '" << orig << "' with '" << fake << "'\n";
}
}
void augmentFont(LyXFont & font, string const & name)
{
static bool initialized = false;
if (!initialized) {
initialized = true;
// fake fonts if necessary
if (!lyx_gui::font_available(getFont("mathfrak")))
fakeFont("mathfrak", "lyxfakefrak");
if (!lyx_gui::font_available(getFont("mathcal")))
fakeFont("mathcal", "lyxfakecal");
}
fontinfo * info = searchFont(name);
if (info->family_ != inh_family)
font.setFamily(info->family_);
if (info->series_ != inh_series)
font.setSeries(info->series_);
if (info->shape_ != inh_shape)
font.setShape(info->shape_);
if (info->color_ != LColor::none)
font.setColor(info->color_);
}