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"
21 #include "TextPainter.h"
23 #include "frontends/FontMetrics.h"
25 #include "support/debug.h"
26 #include "support/lstrings.h"
31 extern bool has_math_fonts;
34 static bool isBinaryOp(char_type c)
36 return support::contains("+-<>=/*", static_cast<char>(c));
40 static bool slanted(char_type c)
42 return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
46 InsetMathChar::InsetMathChar(char_type c)
47 : char_(c), kerning_(0)
52 Inset * InsetMathChar::clone() const
54 return new InsetMathChar(*this);
58 void InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
61 if (char_ == '=' && has_math_fonts) {
62 FontSetChanger dummy(mi.base, "cmr");
63 dim = theFontMetrics(mi.base.font).dimension(char_);
64 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
65 FontSetChanger dummy(mi.base, "cmm");
66 dim = theFontMetrics(mi.base.font).dimension(char_);
67 } else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
68 ShapeChanger dummy(mi.base.font, UP_SHAPE);
69 dim = theFontMetrics(mi.base.font).dimension(char_);
71 frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
72 dim = fm.dimension(char_);
73 kerning_ = fm.rbearing(char_) - dim.wid;
75 int const em = mathed_char_width(mi.base.font, 'M');
76 if (isBinaryOp(char_))
77 dim.wid += static_cast<int>(0.5*em+0.5);
78 else if (char_ == '\'')
79 dim.wid += static_cast<int>(0.1667*em+0.5);
81 whichFont(font_, code_, mi);
82 dim = theFontMetrics(font_).dimension(char_);
83 if (isBinaryOp(char_, code_))
84 dim.wid += 2 * theFontMetrics(font_).width(' ');
85 lyxerr << "InsetMathChar::metrics: " << dim << endl;
90 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
92 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
93 int const em = mathed_char_width(pi.base.font, 'M');
94 if (isBinaryOp(char_))
95 x += static_cast<int>(0.25*em+0.5);
96 else if (char_ == '\'')
97 x += static_cast<int>(0.0833*em+0.5);
99 if (char_ == '=' && has_math_fonts) {
100 FontSetChanger dummy(pi.base, "cmr");
101 pi.draw(x, y, char_);
102 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
103 FontSetChanger dummy(pi.base, "cmm");
104 pi.draw(x, y, char_);
105 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
106 ShapeChanger dummy(pi.base.font, UP_SHAPE);
107 pi.draw(x, y, char_);
109 pi.draw(x, y, char_);
112 drawChar(pain, font_, x, y, char_);
117 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
125 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
127 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
128 pain.draw(x, y, char_);
132 void InsetMathChar::write(WriteStream & os) const
138 void InsetMathChar::normalize(NormalStream & os) const
146 void InsetMathChar::octave(OctaveStream & os) const
152 void InsetMathChar::mathmlize(MathStream & ms) const
155 case '<': ms << "<"; break;
156 case '>': ms << ">"; break;
157 case '&': ms << "&"; break;
158 default: ms.os().put(char_); break;
163 bool InsetMathChar::isRelOp() const
165 return char_ == '=' || char_ == '<' || char_ == '>';