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 "TextPainter.h"
22 #include "support/lstrings.h"
24 #include "frontends/FontMetrics.h"
31 extern bool has_math_fonts;
35 bool isBinaryOp(char_type c)
37 return support::contains("+-<>=/*", static_cast<char>(c));
41 bool slanted(char_type c)
43 return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
49 InsetMathChar::InsetMathChar(char_type c)
50 : char_(c), kerning_(0)
55 auto_ptr<Inset> InsetMathChar::doClone() const
57 return auto_ptr<Inset>(new InsetMathChar(*this));
61 bool InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
64 if (char_ == '=' && has_math_fonts) {
65 FontSetChanger dummy(mi.base, "cmr");
66 dim = theFontMetrics(mi.base.font).dimension(char_);
67 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
68 FontSetChanger dummy(mi.base, "cmm");
69 dim = theFontMetrics(mi.base.font).dimension(char_);
70 } else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
71 ShapeChanger dummy(mi.base.font, Font::UP_SHAPE);
72 dim = theFontMetrics(mi.base.font).dimension(char_);
74 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
75 dim = fm.dimension(char_);
76 kerning_ = fm.rbearing(char_) - dim.wid;
78 int const em = mathed_char_width(mi.base.font, 'M');
79 if (isBinaryOp(char_))
80 dim.wid += static_cast<int>(0.5*em+0.5);
81 else if (char_ == '\'')
82 dim.wid += static_cast<int>(0.1667*em+0.5);
84 whichFont(font_, code_, mi);
85 dim = theFontMetrics(font_).dimension(char_);
86 if (isBinaryOp(char_, code_))
87 dim.wid += 2 * theFontMetrics(font_).width(' ');
88 lyxerr << "InsetMathChar::metrics: " << dim << endl;
99 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
101 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
102 int const em = mathed_char_width(pi.base.font, 'M');
103 if (isBinaryOp(char_))
104 x += static_cast<int>(0.25*em+0.5);
105 else if (char_ == '\'')
106 x += static_cast<int>(0.0833*em+0.5);
108 if (char_ == '=' && has_math_fonts) {
109 FontSetChanger dummy(pi.base, "cmr");
110 pi.draw(x, y, char_);
111 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
112 FontSetChanger dummy(pi.base, "cmm");
113 pi.draw(x, y, char_);
114 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
115 ShapeChanger dummy(pi.base.font, Font::UP_SHAPE);
116 pi.draw(x, y, char_);
118 pi.draw(x, y, char_);
121 drawChar(pain, font_, x, y, char_);
126 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
134 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
136 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
137 pain.draw(x, y, char_);
141 void InsetMathChar::write(WriteStream & os) const
147 void InsetMathChar::normalize(NormalStream & os) const
155 void InsetMathChar::octave(OctaveStream & os) const
161 void InsetMathChar::mathmlize(MathStream & ms) const
164 case '<': ms << "<"; break;
165 case '>': ms << ">"; break;
166 case '&': ms << "&"; break;
167 default: ms.os().put(char_); break;
172 bool InsetMathChar::isRelOp() const
174 return char_ == '=' || char_ == '<' || char_ == '>';