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"
29 extern bool has_math_fonts;
33 bool isBinaryOp(char_type c)
35 return support::contains("+-<>=/*", static_cast<char>(c));
39 bool slanted(char_type c)
41 return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
47 InsetMathChar::InsetMathChar(char_type c)
48 : char_(c), kerning_(0)
53 Inset * InsetMathChar::clone() const
55 return new InsetMathChar(*this);
59 void InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
62 if (char_ == '=' && has_math_fonts) {
63 FontSetChanger dummy(mi.base, "cmr");
64 dim = theFontMetrics(mi.base.font).dimension(char_);
65 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
66 FontSetChanger dummy(mi.base, "cmm");
67 dim = theFontMetrics(mi.base.font).dimension(char_);
68 } else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
69 ShapeChanger dummy(mi.base.font, Font::UP_SHAPE);
70 dim = theFontMetrics(mi.base.font).dimension(char_);
72 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
73 dim = fm.dimension(char_);
74 kerning_ = fm.rbearing(char_) - dim.wid;
76 int const em = mathed_char_width(mi.base.font, 'M');
77 if (isBinaryOp(char_))
78 dim.wid += static_cast<int>(0.5*em+0.5);
79 else if (char_ == '\'')
80 dim.wid += static_cast<int>(0.1667*em+0.5);
82 whichFont(font_, code_, mi);
83 dim = theFontMetrics(font_).dimension(char_);
84 if (isBinaryOp(char_, code_))
85 dim.wid += 2 * theFontMetrics(font_).width(' ');
86 lyxerr << "InsetMathChar::metrics: " << dim << endl;
91 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
93 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
94 int const em = mathed_char_width(pi.base.font, 'M');
95 if (isBinaryOp(char_))
96 x += static_cast<int>(0.25*em+0.5);
97 else if (char_ == '\'')
98 x += static_cast<int>(0.0833*em+0.5);
100 if (char_ == '=' && has_math_fonts) {
101 FontSetChanger dummy(pi.base, "cmr");
102 pi.draw(x, y, char_);
103 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
104 FontSetChanger dummy(pi.base, "cmm");
105 pi.draw(x, y, char_);
106 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
107 ShapeChanger dummy(pi.base.font, Font::UP_SHAPE);
108 pi.draw(x, y, char_);
110 pi.draw(x, y, char_);
113 drawChar(pain, font_, x, y, char_);
118 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
126 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
128 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
129 pain.draw(x, y, char_);
133 void InsetMathChar::write(WriteStream & os) const
139 void InsetMathChar::normalize(NormalStream & os) const
147 void InsetMathChar::octave(OctaveStream & os) const
153 void InsetMathChar::mathmlize(MathStream & ms) const
156 case '<': ms << "<"; break;
157 case '>': ms << ">"; break;
158 case '&': ms << "&"; break;
159 default: ms.os().put(char_); break;
164 bool InsetMathChar::isRelOp() const
166 return char_ == '=' || char_ == '<' || char_ == '>';