* Licence details can be found in the file COPYING.
*
* \author Alejandro Aguilar Sierra
- * \author André Pönitz
+ * \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include "InsetMathChar.h"
+#include "MathParser.h"
#include "MathSupport.h"
#include "MathStream.h"
#include "MetricsInfo.h"
#include "Dimension.h"
+#include "BufferEncodings.h"
+#include "LaTeXFeatures.h"
#include "TextPainter.h"
#include "frontends/FontMetrics.h"
#include "support/debug.h"
#include "support/lstrings.h"
+#include "support/textutils.h"
namespace lyx {
extern bool has_math_fonts;
-static bool isBinaryOp(char_type c)
+namespace {
+
+latexkeys const * makeSubstitute(char_type c)
{
- return support::contains("+-<>=/*", static_cast<char>(c));
+ std::string name;
+ switch (c) {
+ // Latex replaces ', *, -, and : with specific symbols. With unicode-math,
+ // these symbols are replaced respectively by ^U+2032, U+2217, U+2212 and
+ // U+2236 (the latter substitution can be turned off with a package
+ // option). Unicode-math also replaces ` with \backprime.
+ // prime needs to be placed in superscript unless an opentype font is used.
+ //case '\'':
+ //name = "prime";
+ //break;
+ case '*':
+ name = "ast";
+ break;
+ case '-':
+ name = "lyxminus";// unicode-math: "minus"
+ break;
+ case ':':
+ name = "ordinarycolon";// unicode-math: "mathratio"
+ break;
+ // The remaining replacements are not real character substitutions (from a
+ // unicode point of view) but are done here: 1. for cosmetic reasons, in the
+ // context of being stuck with CM fonts at the moment, to ensure consistency
+ // with related symbols: -, \leq, \geq, etc. 2. to get the proper spacing
+ // as defined in lib/symbols.
+ case '+':
+ name = "lyxplus";//unicode-math: "mathplus"
+ break;
+ case '>':
+ name = "lyxgt";//unicode-math: "greater"
+ break;
+ case '<':
+ name = "lyxlt";//unicode-math: "less"
+ break;
+ case '=':
+ name = "lyxeqrel";//unicode-math: "equal"
+ break;
+ //case ','://unicode-math: "mathcomma"
+ //case ';'://unicode-math: "mathsemicolon"
+ default:
+ return nullptr;
+ }
+ return in_word_set(from_ascii(name));
}
+} //anonymous namespace
+
static bool slanted(char_type c)
{
- return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
+ return isAlphaASCII(c) || Encodings::isMathAlpha(c);
}
InsetMathChar::InsetMathChar(char_type c)
- : char_(c), kerning_(0)
+ : char_(c), kerning_(0), subst_(makeSubstitute(c))
{}
void InsetMathChar::metrics(MetricsInfo & mi, Dimension & dim) const
{
-#if 1
- if (char_ == '=' && has_math_fonts) {
- FontSetChanger dummy(mi.base, "cmr");
- dim = theFontMetrics(mi.base.font).dimension(char_);
- } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
- FontSetChanger dummy(mi.base, "cmm");
- dim = theFontMetrics(mi.base.font).dimension(char_);
+ bool const mathfont = isMathFont(mi.base.fontname);
+ if (mathfont && subst_) {
+ // If the char has a substitute, draw the replacement symbol
+ // instead, but only in math mode.
+ mathedSymbolDim(mi, dim, subst_);
+ kerning_ = mathed_char_kerning(mi.base.font, *subst_->draw.rbegin());
+ return;
} else if (!slanted(char_) && mi.base.fontname == "mathnormal") {
- ShapeChanger dummy(mi.base.font, UP_SHAPE);
+ Changer dummy = mi.base.font.changeShape(UP_SHAPE);
dim = theFontMetrics(mi.base.font).dimension(char_);
} else {
frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
dim = fm.dimension(char_);
kerning_ = fm.rbearing(char_) - dim.wid;
}
- int const em = mathed_char_width(mi.base.font, 'M');
- if (isBinaryOp(char_))
- dim.wid += static_cast<int>(0.5*em+0.5);
- else if (char_ == '\'')
- dim.wid += static_cast<int>(0.1667*em+0.5);
-#else
- whichFont(font_, code_, mi);
- dim = theFontMetrics(font_).dimension(char_);
- if (isBinaryOp(char_, code_))
- dim.wid += 2 * theFontMetrics(font_).width(' ');
- lyxerr << "InsetMathChar::metrics: " << dim << endl;
-#endif
+ if (mathfont && isMathPunct())
+ dim.wid += mathed_thinmuskip(mi.base.font);
}
void InsetMathChar::draw(PainterInfo & pi, int x, int y) const
{
- //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << endl;
- int const em = mathed_char_width(pi.base.font, 'M');
- if (isBinaryOp(char_))
- x += static_cast<int>(0.25*em+0.5);
- else if (char_ == '\'')
- x += static_cast<int>(0.0833*em+0.5);
-#if 1
- if (char_ == '=' && has_math_fonts) {
- FontSetChanger dummy(pi.base, "cmr");
- pi.draw(x, y, char_);
- } else if ((char_ == '>' || char_ == '<') && has_math_fonts) {
- FontSetChanger dummy(pi.base, "cmm");
- pi.draw(x, y, char_);
- } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
- ShapeChanger dummy(pi.base.font, UP_SHAPE);
- pi.draw(x, y, char_);
- } else {
- pi.draw(x, y, char_);
+ //lyxerr << "drawing '" << char_ << "' font: " << pi.base.fontname << std::endl;
+ if (isMathFont(pi.base.fontname)) {
+ if (subst_) {
+ // If the char has a substitute, draw the replacement symbol
+ // instead, but only in math mode.
+ mathedSymbolDraw(pi, x, y, subst_);
+ return;
+ } else if (!slanted(char_) && pi.base.fontname == "mathnormal") {
+ Changer dummy = pi.base.font.changeShape(UP_SHAPE);
+ pi.draw(x, y, char_);
+ return;
+ }
}
-#else
- drawChar(pain, font_, x, y, char_);
-#endif
+ pi.draw(x, y, char_);
}
}
+void InsetMathChar::validate(LaTeXFeatures & features) const
+{
+ if (!isASCII(char_))
+ BufferEncodings::validate(char_, features, true);
+}
+
+
void InsetMathChar::normalize(NormalStream & os) const
{
os << "[char ";
}
+// We have a bit of a problem here. MathML wants to know whether the
+// character represents an "identifier" or an "operator", and we have
+// no general way of telling. So we shall guess: If it's alpha or
+// mathalpha, then we'll treat it as an identifier, otherwise as an
+// operator.
+// Worst case: We get bad spacing, or bad italics.
void InsetMathChar::mathmlize(MathStream & ms) const
{
+ std::string entity;
+ switch (char_) {
+ case '<': entity = "<"; break;
+ case '>': entity = ">"; break;
+ case '&': entity = "&"; break;
+ case ' ': {
+ ms << from_ascii(" ");
+ return;
+ }
+ default: break;
+ }
+
+ if (ms.inText()) {
+ if (entity.empty())
+ ms.os().put(char_);
+ else
+ ms << from_ascii(entity);
+ return;
+ }
+
+ if (!entity.empty()) {
+ ms << "<mo>" << from_ascii(entity) << "</mo>";
+ return;
+ }
+
+ char const * type =
+ (isAlphaASCII(char_) || Encodings::isMathAlpha(char_))
+ ? "mi" : "mo";
+ // we don't use MTag and ETag because we do not want the spacing
+ ms << "<" << type << ">" << char_type(char_) << "</" << type << ">";
+}
+
+
+void InsetMathChar::htmlize(HtmlStream & ms) const
+{
+ std::string entity;
+ // Not taking subst_ into account here because the MathML output of
+ // <>=+-* looks correct as it is. FIXME: ' is not output as ^\prime
switch (char_) {
- case '<': ms << "<"; break;
- case '>': ms << ">"; break;
- case '&': ms << "&"; break;
- default: ms.os().put(char_); break;
+ case '<': entity = "<"; break;
+ case '>': entity = ">"; break;
+ case '&': entity = "&"; break;
+ case ' ': entity = " "; break;
+ default: break;
+ }
+
+ bool have_entity = !entity.empty();
+
+ if (ms.inText()) {
+ if (have_entity)
+ ms << from_ascii(entity);
+ else
+ ms.os().put(char_);
+ return;
}
+
+ if (have_entity) {
+ // an operator, so give some space
+ ms << ' ' << from_ascii(entity) << ' ';
+ return;
+ }
+
+ if (isAlphaASCII(char_) || Encodings::isMathAlpha(char_))
+ // we don't use MTag and ETag because we do not want the spacing
+ ms << MTag("i") << char_type(char_) << ETag("i");
+ else
+ // an operator, so give some space
+ ms << " " << char_type(char_) << " ";
+}
+
+
+bool InsetMathChar::isMathBin() const
+{
+ return subst_ && subst_->extra == "mathbin";
+}
+
+
+bool InsetMathChar::isMathRel() const
+{
+ return subst_ && subst_->extra == "mathrel";
}
-bool InsetMathChar::isRelOp() const
+bool InsetMathChar::isMathPunct() const
{
- return char_ == '=' || char_ == '<' || char_ == '>';
+ return support::contains(",;", static_cast<char>(char_))
+ || (subst_ && subst_->extra == "mathpunct");
}
projects / lyx.git / blobdiff