mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-28 12:26:59 +00:00
f4892a2d33
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3280 a592a061-630c-0410-9148-cb99ea01b6c8
796 lines
16 KiB
C
796 lines
16 KiB
C
#include <config.h>
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#include <map>
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#include "math_support.h"
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#include "lyxfont.h"
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#include "FontLoader.h"
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#include "font.h"
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#include "math_cursor.h"
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#include "math_defs.h"
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#include "math_inset.h"
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#include "math_parser.h"
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#include "Painter.h"
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#include "debug.h"
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using std::map;
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using std::endl;
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using std::max;
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bool isBinaryOp(char c, MathTextCodes type)
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{
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return type < LM_TC_SYMB && strchr("+-<>=/*", c);
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}
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///
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class Matrix {
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public:
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///
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Matrix(int, double, double);
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///
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void transform(double &, double &);
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private:
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///
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double m_[2][2];
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};
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Matrix::Matrix(int code, double x, double y)
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{
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double const cs = (code & 1) ? 0 : (1 - code);
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double const sn = (code & 1) ? (2 - code) : 0;
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m_[0][0] = cs * x;
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m_[0][1] = sn * x;
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m_[1][0] = -sn * y;
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m_[1][1] = cs * y;
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}
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void Matrix::transform(double & x, double & y)
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{
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double xx = m_[0][0] * x + m_[0][1] * y;
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double yy = m_[1][0] * x + m_[1][1] * y;
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x = xx;
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y = yy;
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}
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namespace {
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LyXFont * MathFonts = 0;
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bool font_available[LM_FONT_END];
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bool font_available_initialized[LM_FONT_END];
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enum MathFont {
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FONT_IT,
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FONT_SYMBOL,
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FONT_SYMBOLI,
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FONT_BF,
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FONT_TT,
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FONT_RM,
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FONT_SF,
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FONT_CMR,
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FONT_CMSY,
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FONT_CMM,
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FONT_CMEX,
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FONT_MSA,
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FONT_MSB,
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FONT_EUFRAK,
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FONT_FAKEBB,
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FONT_FAKECAL,
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FONT_FAKEFRAK,
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FONT_NUM
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};
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void mathed_init_fonts()
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{
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MathFonts = new LyXFont[FONT_NUM];
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MathFonts[FONT_IT].setShape(LyXFont::ITALIC_SHAPE);
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MathFonts[FONT_SYMBOL].setFamily(LyXFont::SYMBOL_FAMILY);
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MathFonts[FONT_SYMBOLI].setFamily(LyXFont::SYMBOL_FAMILY);
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MathFonts[FONT_SYMBOLI].setShape(LyXFont::ITALIC_SHAPE);
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MathFonts[FONT_BF].setSeries(LyXFont::BOLD_SERIES);
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MathFonts[FONT_TT].setFamily(LyXFont::TYPEWRITER_FAMILY);
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MathFonts[FONT_RM].setFamily(LyXFont::ROMAN_FAMILY);
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MathFonts[FONT_SF].setFamily(LyXFont::SANS_FAMILY);
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MathFonts[FONT_CMR].setFamily(LyXFont::CMR_FAMILY);
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MathFonts[FONT_CMSY].setFamily(LyXFont::CMSY_FAMILY);
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MathFonts[FONT_CMM].setFamily(LyXFont::CMM_FAMILY);
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MathFonts[FONT_CMEX].setFamily(LyXFont::CMEX_FAMILY);
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MathFonts[FONT_MSA].setFamily(LyXFont::MSA_FAMILY);
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MathFonts[FONT_MSB].setFamily(LyXFont::MSB_FAMILY);
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MathFonts[FONT_EUFRAK].setFamily(LyXFont::EUFRAK_FAMILY);
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MathFonts[FONT_FAKEBB].setFamily(LyXFont::TYPEWRITER_FAMILY);
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MathFonts[FONT_FAKEBB].setSeries(LyXFont::BOLD_SERIES);
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MathFonts[FONT_FAKECAL].setFamily(LyXFont::SANS_FAMILY);
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MathFonts[FONT_FAKECAL].setShape(LyXFont::ITALIC_SHAPE);
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MathFonts[FONT_FAKEFRAK].setFamily(LyXFont::SANS_FAMILY);
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MathFonts[FONT_FAKEFRAK].setSeries(LyXFont::BOLD_SERIES);
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for (int i = 0; i < LM_FONT_END; ++i)
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font_available_initialized[i] = false;
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}
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LyXFont const & whichFontBaseIntern(MathTextCodes type)
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{
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if (!MathFonts)
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mathed_init_fonts();
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switch (type) {
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case LM_TC_SYMB:
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case LM_TC_BOLDSYMB:
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return MathFonts[FONT_SYMBOLI];
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case LM_TC_VAR:
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case LM_TC_IT:
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return MathFonts[FONT_IT];
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case LM_TC_BF:
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return MathFonts[FONT_BF];
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case LM_TC_BB:
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return MathFonts[FONT_MSB];
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case LM_TC_CAL:
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return MathFonts[FONT_CMSY];
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case LM_TC_TT:
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return MathFonts[FONT_TT];
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case LM_TC_BOX:
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case LM_TC_TEXTRM:
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case LM_TC_CONST:
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case LM_TC_TEX:
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case LM_TC_RM:
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return MathFonts[FONT_RM];
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case LM_TC_SF:
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return MathFonts[FONT_SF];
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case LM_TC_CMR:
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return MathFonts[FONT_CMR];
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case LM_TC_CMSY:
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return MathFonts[FONT_CMSY];
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case LM_TC_CMM:
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return MathFonts[FONT_CMM];
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case LM_TC_CMEX:
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return MathFonts[FONT_CMEX];
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case LM_TC_MSA:
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return MathFonts[FONT_MSA];
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case LM_TC_MSB:
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return MathFonts[FONT_MSB];
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case LM_TC_EUFRAK:
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return MathFonts[FONT_EUFRAK];
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default:
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break;
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}
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return MathFonts[1];
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}
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LyXFont const & whichFontBase(MathTextCodes type)
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{
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if (!MathFonts)
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mathed_init_fonts();
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switch (type) {
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case LM_TC_BB:
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if (math_font_available(LM_TC_MSB))
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return MathFonts[FONT_MSB];
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else
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return MathFonts[FONT_FAKEBB];
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case LM_TC_CAL:
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if (math_font_available(LM_TC_CMSY))
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return MathFonts[FONT_CMSY];
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else
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return MathFonts[FONT_FAKECAL];
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case LM_TC_EUFRAK:
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if (math_font_available(LM_TC_EUFRAK))
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return MathFonts[FONT_EUFRAK];
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else
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return MathFonts[FONT_FAKEFRAK];
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default:
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break;
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}
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return whichFontBaseIntern(type);
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}
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LyXFont whichFont(MathTextCodes type, MathMetricsInfo const & size)
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{
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LyXFont f = whichFontBase(type);
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// use actual size
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f.setSize(size.font.size());
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switch (size.style) {
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case LM_ST_DISPLAY:
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if (type == LM_TC_BOLDSYMB || type == LM_TC_CMEX) {
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f.incSize();
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f.incSize();
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}
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break;
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case LM_ST_TEXT:
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break;
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case LM_ST_SCRIPT:
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f.decSize();
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f.decSize();
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break;
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case LM_ST_SCRIPTSCRIPT:
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f.decSize();
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f.decSize();
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f.decSize();
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break;
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default:
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lyxerr << "Math Error: wrong font size: " << size.style << endl;
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break;
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}
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if (type != LM_TC_TEXTRM && type != LM_TC_BOX)
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f.setColor(LColor::math);
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if (type == LM_TC_TEX)
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f.setColor(LColor::latex);
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return f;
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}
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} // namespace
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bool math_font_available(MathTextCodes type)
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{
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if (!font_available_initialized[type]) {
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font_available_initialized[type] = true;
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font_available[type] = fontloader.available(whichFontBaseIntern(type));
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}
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return font_available[type];
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}
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namespace {
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/*
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* Internal struct of a drawing: code n x1 y1 ... xn yn, where code is:
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* 0 = end, 1 = line, 2 = polyline, 3 = square line, 4= square polyline
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*/
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double const parenthHigh[] = {
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2, 13,
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0.9840, 0.0014, 0.7143, 0.0323, 0.4603, 0.0772,
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0.2540, 0.1278, 0.1746, 0.1966, 0.0952, 0.3300,
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0.0950, 0.5000, 0.0952, 0.6700, 0.1746, 0.8034,
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0.2540, 0.8722, 0.4603, 0.9228, 0.7143, 0.9677,
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0.9840, 0.9986,
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0
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};
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double const parenth[] = {
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2, 13,
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0.9930, 0.0071, 0.7324, 0.0578, 0.5141, 0.1126,
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0.3380, 0.1714, 0.2183, 0.2333, 0.0634, 0.3621,
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0.0141, 0.5000, 0.0563, 0.6369, 0.2113, 0.7647,
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0.3310, 0.8276, 0.5070, 0.8864, 0.7254, 0.9412,
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0.9930, 0.9919,
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0
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};
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double const brace[] = {
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2, 21,
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0.9492, 0.0020, 0.9379, 0.0020, 0.7458, 0.0243,
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0.5819, 0.0527, 0.4859, 0.0892, 0.4463, 0.1278,
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0.4463, 0.3732, 0.4011, 0.4199, 0.2712, 0.4615,
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0.0734, 0.4919, 0.0113, 0.5000, 0.0734, 0.5081,
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0.2712, 0.5385, 0.4011, 0.5801, 0.4463, 0.6268,
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0.4463, 0.8722, 0.4859, 0.9108, 0.5819, 0.9473,
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0.7458, 0.9757, 0.9379, 0.9980, 0.9492, 0.9980,
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0
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};
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double const arrow[] = {
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4, 7,
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0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
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0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
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0.9500, 0.7500,
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3, 0.5000, 0.1500, 0.5000, 0.9500,
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0
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};
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double const Arrow[] = {
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4, 7,
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0.0150, 0.7500, 0.2000, 0.6000, 0.3500, 0.3500,
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0.5000, 0.0500, 0.6500, 0.3500, 0.8000, 0.6000,
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0.9500, 0.7500,
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3, 0.3500, 0.5000, 0.3500, 0.9500,
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3, 0.6500, 0.5000, 0.6500, 0.9500,
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0
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};
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double const udarrow[] = {
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2, 3,
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0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
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2, 3,
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0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
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1, 0.5, 0.2, 0.5, 0.8,
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0
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};
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double const Udarrow[] = {
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2, 3,
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0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
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2, 3,
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0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
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1, 0.35, 0.2, 0.35, 0.8,
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1, 0.65, 0.2, 0.65, 0.8,
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0
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};
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double const brack[] = {
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2, 4,
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0.95, 0.05, 0.05, 0.05, 0.05, 0.95, 0.95, 0.95,
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0
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};
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double const corner[] = {
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2, 3,
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0.95, 0.05, 0.05, 0.05, 0.05, 0.95,
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0
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};
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double const angle[] = {
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2, 3,
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1, 0, 0.05, 0.5, 1, 1,
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0
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};
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double const slash[] = {
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1, 0.95, 0.05, 0.05, 0.95,
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0
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};
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double const hline[] = {
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1, 0.00, 0.5, 1.0, 0.5,
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0
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};
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double const hline2[] = {
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1, 0.1, 0.5, 0.3, 0.5,
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1, 0.7, 0.5, 0.9, 0.5,
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0
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};
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double const hline3[] = {
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1, 0.1, 0, 0.15, 0,
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1, 0.475, 0, 0.525, 0,
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1, 0.85, 0, 0.9, 0,
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0
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};
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double const dline3[] = {
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1, 0.1, 0.1, 0.15, 0.15,
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1, 0.475, 0.475, 0.525, 0.525,
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1, 0.85, 0.85, 0.9, 0.9,
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0
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};
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double const hlinesmall[] = {
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1, 0.4, 0.5, 0.6, 0.5,
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0
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};
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double const vert[] = {
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1, 0.5, 0.05, 0.5, 0.95,
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0
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};
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double const Vert[] = {
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1, 0.3, 0.05, 0.3, 0.95,
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1, 0.7, 0.05, 0.7, 0.95,
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0
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};
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double const tilde[] = {
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2, 4,
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0.05, 0.8, 0.25, 0.2, 0.75, 0.8, 0.95, 0.2,
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0
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};
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struct deco_struct {
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double const * data;
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int angle;
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};
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struct named_deco_struct {
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char const * name;
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double const * data;
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int angle;
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};
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named_deco_struct deco_table[] = {
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// Decorations
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{"widehat", angle, 3 },
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{"widetilde", tilde, 0 },
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{"underline", hline, 0 },
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{"overline", hline, 0 },
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{"underbrace", brace, 1 },
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{"overbrace", brace, 3 },
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{"overleftarrow", arrow, 1 },
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{"overrightarrow", arrow, 3 },
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// Delimiters
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{"(", parenth, 0 },
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{")", parenth, 2 },
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{"{", brace, 0 },
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{"}", brace, 2 },
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{"[", brack, 0 },
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{"]", brack, 2 },
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{"|", vert, 0 },
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{"/", slash, 0 },
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{"Vert", Vert, 0 },
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{"'", slash, 1 },
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{"backslash", slash, 1 },
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{"langle", angle, 0 },
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{"lceil", corner, 0 },
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{"lfloor", corner, 1 },
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{"rangle", angle, 2 },
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{"rceil", corner, 3 },
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{"rfloor", corner, 2 },
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{"downarrow", arrow, 2 },
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{"Downarrow", Arrow, 2 },
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{"uparrow", arrow, 0 },
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{"Uparrow", Arrow, 0 },
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{"updownarrow", udarrow, 0 },
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{"Updownarrow", Udarrow, 0 },
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// Accents
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{"ddot", hline2, 0 },
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{"hat", angle, 3 },
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{"grave", slash, 1 },
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{"acute", slash, 0 },
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{"tilde", tilde, 0 },
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{"bar", hline, 0 },
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{"dot", hlinesmall, 0 },
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{"check", angle, 1 },
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{"breve", parenth, 1 },
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{"vec", arrow, 3 },
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{"not", slash, 0 },
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// Dots
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{"ldots", hline3, 0 },
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{"cdots", hline3, 0 },
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{"vdots", hline3, 1 },
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{"ddots", dline3, 0 }
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};
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map<string, deco_struct> deco_list;
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// sort the table on startup
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struct init_deco_table {
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init_deco_table() {
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unsigned const n = sizeof(deco_table) / sizeof(deco_table[0]);
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for (named_deco_struct * p = deco_table; p != deco_table + n; ++p) {
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deco_struct d;
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d.data = p->data;
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d.angle = p->angle;
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deco_list[p->name]= d;
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}
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}
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};
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static init_deco_table dummy;
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deco_struct const * search_deco(string const & name)
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{
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map<string, deco_struct>::const_iterator p = deco_list.find(name);
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return (p == deco_list.end()) ? 0 : &(p->second);
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}
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} // namespace anon
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void mathed_char_dim(MathTextCodes type, MathMetricsInfo const & size,
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unsigned char c, int & asc, int & des, int & wid)
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{
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LyXFont const font = whichFont(type, size);
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des = lyxfont::descent(c, font);
|
|
asc = lyxfont::ascent(c, font);
|
|
wid = mathed_char_width(type, size, c);
|
|
}
|
|
|
|
|
|
int mathed_char_height(MathTextCodes type, MathMetricsInfo const & size,
|
|
unsigned char c, int & asc, int & des)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
des = lyxfont::descent(c, font);
|
|
asc = lyxfont::ascent(c, font);
|
|
return asc + des;
|
|
}
|
|
|
|
|
|
int mathed_char_height(MathTextCodes type, MathMetricsInfo const & size,
|
|
unsigned char c)
|
|
{
|
|
int asc;
|
|
int des;
|
|
return mathed_char_height(type, size, c, asc, des);
|
|
}
|
|
|
|
|
|
int mathed_char_ascent(MathTextCodes type, MathMetricsInfo const & size,
|
|
unsigned char c)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
return lyxfont::ascent(c, font);
|
|
}
|
|
|
|
|
|
int mathed_char_descent(MathTextCodes type, MathMetricsInfo const & size,
|
|
unsigned char c)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
return lyxfont::descent(c, font);
|
|
}
|
|
|
|
|
|
int mathed_char_width(MathTextCodes type, MathMetricsInfo const & size,
|
|
unsigned char c)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
if (isBinaryOp(c, type))
|
|
return lyxfont::width(c, font) + 2 * lyxfont::width(' ', font);
|
|
else
|
|
return lyxfont::width(c, font);
|
|
}
|
|
|
|
|
|
void mathed_string_dim(MathTextCodes type, MathMetricsInfo const & size,
|
|
string const & s, int & asc, int & des, int & wid)
|
|
{
|
|
mathed_string_height(type, size, s, asc, des);
|
|
wid = mathed_string_width(type, size, s);
|
|
}
|
|
|
|
|
|
int mathed_string_height(MathTextCodes type, MathMetricsInfo const & size,
|
|
string const & s, int & asc, int & des)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
asc = des = 0;
|
|
for (string::const_iterator it = s.begin(); it != s.end(); ++it) {
|
|
des = max(des, lyxfont::descent(*it, font));
|
|
asc = max(asc, lyxfont::ascent(*it, font));
|
|
}
|
|
return asc + des;
|
|
}
|
|
|
|
|
|
int mathed_string_width(MathTextCodes type, MathMetricsInfo const & size,
|
|
string const & s)
|
|
{
|
|
return lyxfont::width(s, whichFont(type, size));
|
|
}
|
|
|
|
|
|
int mathed_string_ascent(MathTextCodes type, MathMetricsInfo const & size,
|
|
string const & s)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
int asc = 0;
|
|
for (string::const_iterator it = s.begin(); it != s.end(); ++it)
|
|
asc = max(asc, lyxfont::ascent(*it, font));
|
|
return asc;
|
|
}
|
|
|
|
|
|
int mathed_string_descent(MathTextCodes type, MathMetricsInfo const & size,
|
|
string const & s)
|
|
{
|
|
LyXFont const font = whichFont(type, size);
|
|
int des = 0;
|
|
for (string::const_iterator it = s.begin(); it != s.end(); ++it)
|
|
des = max(des, lyxfont::descent(*it, font));
|
|
return des;
|
|
}
|
|
|
|
|
|
|
|
void mathed_draw_deco(Painter & pain, int x, int y, int w, int h,
|
|
const string & name)
|
|
{
|
|
if (name == ".") {
|
|
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);
|
|
pain.line(x + int(xx), y + int(yy), x + int(x2), y + int(y2),
|
|
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] = x + int(xx);
|
|
yp[j] = y + int(yy);
|
|
// lyxerr << "P[" << j " " << xx << " " << yy << " " << x << " " << y << "]";
|
|
}
|
|
pain.lines(xp, yp, n, LColor::math);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void mathed_draw_framebox(Painter & pain, int x, int y, MathInset const * p)
|
|
{
|
|
if (mathcursor && mathcursor->isInside(p))
|
|
pain.rectangle(x, y - p->ascent(), p->width(), p->height(),
|
|
LColor::mathframe);
|
|
}
|
|
|
|
|
|
// In the future maybe we use a better fonts renderer
|
|
void drawStr(Painter & pain, MathTextCodes type, MathMetricsInfo const & siz,
|
|
int x, int y, string const & s)
|
|
{
|
|
pain.text(x, y, s, whichFont(type, siz));
|
|
}
|
|
|
|
|
|
void drawChar(Painter & pain, MathTextCodes type, MathMetricsInfo const & siz,
|
|
int x, int y, char c)
|
|
{
|
|
string s;
|
|
if (isBinaryOp(c, type))
|
|
s += ' ';
|
|
s += c;
|
|
if (isBinaryOp(c, type))
|
|
s += ' ';
|
|
drawStr(pain, type, siz, x, y, s);
|
|
}
|
|
|
|
|
|
// decrease math size for super- and subscripts
|
|
void smallerStyleScript(MathMetricsInfo & st)
|
|
{
|
|
switch (st.style) {
|
|
case LM_ST_DISPLAY:
|
|
case LM_ST_TEXT: st.style = LM_ST_SCRIPT; break;
|
|
default: st.style = LM_ST_SCRIPTSCRIPT;
|
|
}
|
|
}
|
|
|
|
|
|
// decrease math size for fractions
|
|
void smallerStyleFrac(MathMetricsInfo & st)
|
|
{
|
|
switch (st.style) {
|
|
case LM_ST_DISPLAY: st.style = LM_ST_TEXT; break;
|
|
case LM_ST_TEXT: st.style = LM_ST_SCRIPT; break;
|
|
default: st.style = LM_ST_SCRIPTSCRIPT;
|
|
}
|
|
}
|
|
|
|
|
|
void math_font_max_dim(MathTextCodes code, MathMetricsInfo const & siz,
|
|
int & asc, int & des)
|
|
{
|
|
LyXFont font = whichFont(code, siz);
|
|
asc = lyxfont::maxAscent(font);
|
|
des = lyxfont::maxDescent(font);
|
|
}
|
|
|
|
|
|
char const * latex_mathspace[] = {
|
|
"!", ",", ":", ";", "quad", "qquad"
|
|
};
|
|
|
|
|
|
char const * math_font_name(MathTextCodes code)
|
|
{
|
|
static char const * theFontNames[] = {
|
|
"mathrm",
|
|
"mathcal",
|
|
"mathfrak",
|
|
"mathbf",
|
|
"mathbb",
|
|
"mathsf",
|
|
"mathtt",
|
|
"mathit",
|
|
"textrm"
|
|
};
|
|
|
|
if (code >= LM_TC_RM && code <= LM_TC_TEXTRM)
|
|
return theFontNames[code - LM_TC_RM];
|
|
return 0;
|
|
}
|