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"
16 #include "MathSupport.h"
17 #include "MathStream.h"
18 #include "MetricsInfo.h"
20 #include "Dimension.h"
22 #include "LaTeXFeatures.h"
23 #include "TextPainter.h"
25 #include "frontends/FontMetrics.h"
27 #include "support/debug.h"
28 #include "support/lstrings.h"
33 extern bool has_math_fonts;
36 static bool isBinaryOp(char_type c)
38 return support::contains("+-<>=/*", static_cast<char>(c));
42 static bool slanted(char_type c)
44 return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
48 InsetMathChar::InsetMathChar(char_type c)
49 : char_(c), kerning_(0)
54 Inset * InsetMathChar::clone() const
56 return new InsetMathChar(*this);
60 void InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
63 if (char_ == '=' && has_math_fonts) {
64 FontSetChanger dummy(mi.base, "cmr");
65 dim = theFontMetrics(mi.base.font).dimension(char_);
66 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
67 FontSetChanger dummy(mi.base, "cmm");
68 dim = theFontMetrics(mi.base.font).dimension(char_);
69 } else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
70 ShapeChanger dummy(mi.base.font, UP_SHAPE);
71 dim = theFontMetrics(mi.base.font).dimension(char_);
73 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
74 dim = fm.dimension(char_);
75 kerning_ = fm.rbearing(char_) - dim.wid;
77 int const em = mathed_char_width(mi.base.font, 'M');
78 if (isBinaryOp(char_))
79 dim.wid += static_cast<int>(0.5*em+0.5);
80 else if (char_ == '\'')
81 dim.wid += static_cast<int>(0.1667*em+0.5);
83 whichFont(font_, code_, mi);
84 dim = theFontMetrics(font_).dimension(char_);
85 if (isBinaryOp(char_, code_))
86 dim.wid += 2 * theFontMetrics(font_).width(' ');
87 lyxerr << "InsetMathChar::metrics: " << dim << endl;
92 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
94 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
95 int const em = mathed_char_width(pi.base.font, 'M');
96 if (isBinaryOp(char_))
97 x += static_cast<int>(0.25*em+0.5);
98 else if (char_ == '\'')
99 x += static_cast<int>(0.0833*em+0.5);
101 if (char_ == '=' && has_math_fonts) {
102 FontSetChanger dummy(pi.base, "cmr");
103 pi.draw(x, y, char_);
104 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
105 FontSetChanger dummy(pi.base, "cmm");
106 pi.draw(x, y, char_);
107 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
108 ShapeChanger dummy(pi.base.font, UP_SHAPE);
109 pi.draw(x, y, char_);
111 pi.draw(x, y, char_);
114 drawChar(pain, font_, x, y, char_);
119 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
127 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
129 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
130 pain.draw(x, y, char_);
134 void InsetMathChar::write(WriteStream & os) const
140 void InsetMathChar::validate(LaTeXFeatures & features) const
143 encodings.validate(char_, features, true);
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_ == '>';