2 * \file InsetMathChar.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Alejandro Aguilar Sierra
9 * Full author contact details are available in file CREDITS.
14 #include "InsetMathChar.h"
15 #include "MathSupport.h"
16 #include "MathStream.h"
19 #include "Dimension.h"
20 #include "support/lstrings.h"
21 #include "TextPainter.h"
23 #include "frontends/FontMetrics.h"
30 extern bool has_math_fonts;
34 bool isBinaryOp(char_type c)
36 return support::contains("+-<>=/*", static_cast<char>(c));
40 bool slanted(char_type c)
42 return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
48 InsetMathChar::InsetMathChar(char_type c)
49 : char_(c), kerning_(0)
54 auto_ptr<Inset> InsetMathChar::doClone() const
56 return auto_ptr<Inset>(new InsetMathChar(*this));
60 bool InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
62 if (mi.base.font == font_cache_) {
66 font_cache_ = mi.base.font;
69 if (char_ == '=' && has_math_fonts) {
70 FontSetChanger dummy(mi.base, "cmr");
71 dim = theFontMetrics(mi.base.font).dimension(char_);
72 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
73 FontSetChanger dummy(mi.base, "cmm");
74 dim = theFontMetrics(mi.base.font).dimension(char_);
75 } else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
76 ShapeChanger dummy(mi.base.font, LyXFont::UP_SHAPE);
77 dim = theFontMetrics(mi.base.font).dimension(char_);
79 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
80 dim = fm.dimension(char_);
81 kerning_ = fm.rbearing(char_) - dim.wid;
83 int const em = mathed_char_width(mi.base.font, 'M');
84 if (isBinaryOp(char_))
85 dim.wid += static_cast<int>(0.5*em+0.5);
86 else if (char_ == '\'')
87 dim.wid += static_cast<int>(0.1667*em+0.5);
89 whichFont(font_, code_, mi);
90 dim = theFontMetrics(font_).dimension(char_);
91 if (isBinaryOp(char_, code_))
92 dim.wid += 2 * theFontMetrics(font_).width(' ');
93 lyxerr << "InsetMathChar::metrics: " << dim << endl;
100 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
102 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
103 int const em = mathed_char_width(pi.base.font, 'M');
104 if (isBinaryOp(char_))
105 x += static_cast<int>(0.25*em+0.5);
106 else if (char_ == '\'')
107 x += static_cast<int>(0.0833*em+0.5);
109 if (char_ == '=' && has_math_fonts) {
110 FontSetChanger dummy(pi.base, "cmr");
111 pi.draw(x, y, char_);
112 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
113 FontSetChanger dummy(pi.base, "cmm");
114 pi.draw(x, y, char_);
115 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
116 ShapeChanger dummy(pi.base.font, LyXFont::UP_SHAPE);
117 pi.draw(x, y, char_);
119 pi.draw(x, y, char_);
122 drawChar(pain, font_, x, y, char_);
127 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
135 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
137 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
138 pain.draw(x, y, char_);
142 void InsetMathChar::write(WriteStream & os) const
148 void InsetMathChar::normalize(NormalStream & os) const
156 void InsetMathChar::octave(OctaveStream & os) const
162 void InsetMathChar::mathmlize(MathStream & ms) const
165 case '<': ms << "<"; break;
166 case '>': ms << ">"; break;
167 case '&': ms << "&"; break;
168 default: ms.os().put(char_); break;
173 bool InsetMathChar::isRelOp() const
175 return char_ == '=' || char_ == '<' || char_ == '>';