lyx_mirror/src/mathed/InsetMathBig.cpp
Enrico Forestieri fe7196a545 The delimiters '<' and '>' can also be used as big delimiters. They are
equivalent to \langle and \rangle, which were already taken into account.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34607 a592a061-630c-0410-9148-cb99ea01b6c8
2010-06-06 18:11:15 +00:00

244 lines
5.9 KiB
C++

/**
* \file InsetMathBig.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "InsetMathBig.h"
#include "LaTeXFeatures.h"
#include "MathSupport.h"
#include "MathStream.h"
#include "MetricsInfo.h"
#include "frontends/FontMetrics.h"
#include "support/docstream.h"
#include "support/lstrings.h"
namespace lyx {
InsetMathBig::InsetMathBig(docstring const & name, docstring const & delim)
: name_(name), delim_(delim)
{}
docstring InsetMathBig::name() const
{
return name_;
}
Inset * InsetMathBig::clone() const
{
return new InsetMathBig(*this);
}
InsetMathBig::size_type InsetMathBig::size() const
{
// order: big Big bigg Bigg biggg Biggg
// 0 1 2 3 4 5
char_type const c = name_[name_.size() - 1];
int const base_size = (c == 'l' || c == 'm' || c == 'r') ? 4 : 3;
return name_[0] == 'B' ?
2 * (name_.size() - base_size) + 1:
2 * (name_.size() - base_size);
}
double InsetMathBig::increase() const
{
// The formula used in amsmath.sty is
// 1.2 * (1.0 + size() * 0.5) - 1.0.
// We use a smaller step and a bigger offset because our base size
// is different.
return (size() + 1) * 0.3;
}
void InsetMathBig::metrics(MetricsInfo & mi, Dimension & dim) const
{
double const h = theFontMetrics(mi.base.font).ascent('I');
double const f = increase();
dim.wid = 6;
dim.asc = int(h + f * h);
dim.des = int(f * h);
}
void InsetMathBig::draw(PainterInfo & pi, int x, int y) const
{
Dimension const dim = dimension(*pi.base.bv);
// mathed_draw_deco does not use the leading backslash, so remove it
// (but don't use ltrim if this is the backslash delimiter).
// Replace \| by \Vert (equivalent in LaTeX), since mathed_draw_deco
// would treat it as |.
docstring const delim = (delim_ == "\\|") ? from_ascii("Vert") :
(delim_ == "\\\\") ? from_ascii("\\") : support::ltrim(delim_, "\\");
mathed_draw_deco(pi, x + 1, y - dim.ascent(), 4, dim.height(),
delim);
setPosCache(pi, x, y);
}
void InsetMathBig::write(WriteStream & os) const
{
MathEnsurer ensurer(os);
os << '\\' << name_ << delim_;
if (delim_[0] == '\\')
os.pendingSpace(true);
}
void InsetMathBig::normalize(NormalStream & os) const
{
os << '[' << name_ << ' ' << delim_ << ']';
}
void InsetMathBig::mathmlize(MathStream & os) const
{
os << "<mo form='prefix' fence='true' stretchy='true' symmetric='true'>";
if (delim_ == "(" || delim_ == ")"
|| delim_ == "[" || delim_ == "]"
|| delim_ == "|" || delim_ == "/")
os << delim_;
else if (delim_ == "\\{" || delim_ == "\\lbrace")
os << "{";
else if (delim_ == "\\}" || delim_ == "\\rbrace")
os << "}";
else if (delim_ == "\\slash")
os << "/";
else if (delim_ == "\\|" || delim_ == "\\vert")
os << "|";
else if (delim_ == "\\Vert")
os << "&par;";
else if (delim_ == "\\\\" || delim_ == "\\backslash")
os <<" \\";
else if (delim_ == "\\langle")
os << "&lt;";
else if (delim_ == "\\rangle")
os << "&gt;";
else if (delim_ == "\\lceil")
os << "&lceil;";
else if (delim_ == "\\rceil")
os << "&rceil;";
else if (delim_ == "\\lfloor")
os << "&lfloor;";
else if (delim_ == "\\rfloor")
os << "&rfloor;";
else if (delim_ == "\\downarrow")
os << "&darr;";
else if (delim_ == "\\uparrow")
os << "&uarr;";
else if (delim_ == "\\Downarrow")
os << "&dArr;";
else if (delim_ == "\\Uparrow")
os << "&uArr;";
else if (delim_ == "\\updownarrow")
os << "&varr;";
else if (delim_ == "\\Updownarrow")
os << "&vArr;";
os << "</mo>";
}
void InsetMathBig::htmlize(HtmlStream & os) const
{
std::string name;
switch (size()) {
case 0: case 1: name = "big"; break;
case 2: case 3: name = "bigg"; break;
case 4: case 5: name = "biggg"; break;
default: name = "big"; break;
}
os << MTag("span", "class='" + name + "symbol'");
if (delim_ == "(" || delim_ == ")"
|| delim_ == "[" || delim_ == "]"
|| delim_ == "|" || delim_ == "/")
os << delim_;
else if (delim_ == "\\{" || delim_ == "\\lbrace")
os << "{";
else if (delim_ == "\\}" || delim_ == "\\rbrace")
os << "}";
else if (delim_ == "\\slash")
os << "/";
else if (delim_ == "\\|" || delim_ == "\\vert")
os << "|";
else if (delim_ == "\\Vert")
os << "&par;";
else if (delim_ == "\\\\" || delim_ == "\\backslash")
os <<" \\";
else if (delim_ == "\\langle")
os << "&lt;";
else if (delim_ == "\\rangle")
os << "&gt;";
else if (delim_ == "\\lceil")
os << "&lceil;";
else if (delim_ == "\\rceil")
os << "&rceil;";
else if (delim_ == "\\lfloor")
os << "&lfloor;";
else if (delim_ == "\\rfloor")
os << "&rfloor;";
else if (delim_ == "\\downarrow")
os << "&darr;";
else if (delim_ == "\\uparrow")
os << "&uarr;";
else if (delim_ == "\\Downarrow")
os << "&dArr;";
else if (delim_ == "\\Uparrow")
os << "&uArr;";
else if (delim_ == "\\updownarrow")
os << "&varr;";
else if (delim_ == "\\Updownarrow")
os << "&vArr;";
os << ETag("span");
}
void InsetMathBig::infoize2(odocstream & os) const
{
os << name_;
}
bool InsetMathBig::isBigInsetDelim(docstring const & delim)
{
// mathed_draw_deco must handle these
static char const * const delimiters[] = {
"(", ")", "\\{", "\\}", "\\lbrace", "\\rbrace", "[", "]",
"|", "/", "\\slash", "\\|", "\\vert", "\\Vert", "'",
"<", ">", "\\\\", "\\backslash",
"\\langle", "\\lceil", "\\lfloor",
"\\rangle", "\\rceil", "\\rfloor",
"\\downarrow", "\\Downarrow",
"\\uparrow", "\\Uparrow",
"\\updownarrow", "\\Updownarrow", ""
};
return support::findToken(delimiters, to_utf8(delim)) >= 0;
}
void InsetMathBig::validate(LaTeXFeatures & features) const
{
if (features.runparams().math_flavor == OutputParams::MathAsHTML)
features.addPreambleSnippet("<style type=\"text/css\">\n"
"span.bigsymbol{font-size: 150%;}\n"
"span.biggsymbol{font-size: 200%;}\n"
"span.bigggsymbol{font-size: 225%;}\n"
"</style>");
}
} // namespace lyx