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"
29 #include "support/textutils.h"
34 extern bool has_math_fonts;
37 static bool isBinaryOp(char_type c)
39 return support::contains("+-<>=/*", static_cast<char>(c));
43 static bool slanted(char_type c)
45 return isAlphaASCII(c) || Encodings::isMathAlpha(c);
49 InsetMathChar::InsetMathChar(char_type c)
50 : char_(c), kerning_(0)
55 Inset * InsetMathChar::clone() const
57 return new InsetMathChar(*this);
61 void 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, 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;
93 void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
95 //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
96 int const em = mathed_char_width(pi.base.font, 'M');
97 if (isBinaryOp(char_))
98 x += static_cast<int>(0.25*em+0.5);
99 else if (char_ == '\'')
100 x += static_cast<int>(0.0833*em+0.5);
102 if (char_ == '=' && has_math_fonts) {
103 FontSetChanger dummy(pi.base, "cmr");
104 pi.draw(x, y, char_);
105 } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
106 FontSetChanger dummy(pi.base, "cmm");
107 pi.draw(x, y, char_);
108 } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
109 ShapeChanger dummy(pi.base.font, UP_SHAPE);
110 pi.draw(x, y, char_);
112 pi.draw(x, y, char_);
115 drawChar(pain, font_, x, y, char_);
120 void InsetMathChar::metricsT(TextMetricsInfo const &, Dimension & dim) const
128 void InsetMathChar::drawT(TextPainter & pain, int x, int y) const
130 //lyxerr << "drawing text '" << char_ << "' code: " << code_ << endl;
131 pain.draw(x, y, char_);
135 void InsetMathChar::write(WriteStream & os) const
141 void InsetMathChar::validate(LaTeXFeatures & features) const
144 encodings.validate(char_, features, true);
148 void InsetMathChar::normalize(NormalStream & os) const
156 void InsetMathChar::octave(OctaveStream & os) const
162 // We have a bit of a problem here. MathML wants to know whether the
163 // character represents an "identifier" or an "operator", and we have
164 // no general way of telling. So we shall guess: If it's alpha or
165 // mathalpha, then we'll treat it as an identifier, otherwise as an
167 // Worst case: We get bad spacing, or bad italics.
168 void InsetMathChar::mathmlize(MathStream & ms) const
172 case '<': entity = "<"; break;
173 case '>': entity = ">"; break;
174 case '&': entity = "&"; break;
176 ms << from_ascii(" ");
186 ms << from_ascii(entity);
190 if (!entity.empty()) {
191 ms << "<mo>" << from_ascii(entity) << "</mo>";
196 (isAlphaASCII(char_) || Encodings::isMathAlpha(char_))
198 // we don't use MTag and ETag because we do not want the spacing
199 ms << "<" << type << ">" << char_type(char_) << "</" << type << ">";
203 void InsetMathChar::htmlize(HtmlStream & ms) const
207 case '<': entity = "<"; break;
208 case '>': entity = ">"; break;
209 case '&': entity = "&"; break;
210 case ' ': entity = " "; break;
214 bool have_entity = !entity.empty();
218 ms << from_ascii(entity);
225 // an operator, so give some space
226 ms << ' ' << from_ascii(entity) << ' ';
230 if (isAlphaASCII(char_) || Encodings::isMathAlpha(char_))
231 // we don't use MTag and ETag because we do not want the spacing
232 ms << MTag("i") << char_type(char_) << ETag("i");
234 // an operator, so give some space
235 ms << " " << char_type(char_) << " ";
239 bool InsetMathChar::isRelOp() const
241 return char_ == '=' || char_ == '<' || char_ == '>';