X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FInsetMathFrac.cpp;h=ac2d894e091c118f82564876dcce950ef007bca3;hb=b5acd0389165ad9b10a8414353bb9652e1289568;hp=0237227f8e456b5e7461bbe02369644101dc2bba;hpb=5008ee540f84715cd10e87f3fa0cd5dc7b974784;p=lyx.git

diff --git a/src/mathed/InsetMathFrac.cpp b/src/mathed/InsetMathFrac.cpp
index 0237227f8e..ac2d894e09 100644
--- a/src/mathed/InsetMathFrac.cpp
+++ b/src/mathed/InsetMathFrac.cpp
@@ -1,5 +1,5 @@
 /**
- * \file InsetMathFrac.cpp
+ * \file InsetMathFracBase.cpp
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
@@ -12,30 +12,60 @@
 #include <config.h>
 
 #include "InsetMathFrac.h"
+
+#include "Cursor.h"
+#include "LaTeXFeatures.h"
 #include "MathData.h"
 #include "MathStream.h"
+#include "MathSupport.h"
+#include "MetricsInfo.h"
 #include "TextPainter.h"
-#include "LaTeXFeatures.h"
-#include "Color.h"
+
 #include "frontends/Painter.h"
 
+using namespace std;
 
 namespace lyx {
 
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathFracBase
+//
+/////////////////////////////////////////////////////////////////////
 
-using std::string;
-using std::max;
-using std::auto_ptr;
 
+InsetMathFracBase::InsetMathFracBase(idx_type ncells)
+	: InsetMathNest(ncells)
+{}
 
-InsetMathFrac::InsetMathFrac(Kind kind)
-	: kind_(kind)
+
+bool InsetMathFracBase::idxUpDown(Cursor & cur, bool up) const
+{
+	InsetMath::idx_type target = !up; // up ? 0 : 1, since upper cell has idx 0
+	if (cur.idx() == target)
+		return false;
+	cur.idx() = target;
+	cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
+	return true;
+}
+
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathFrac
+//
+/////////////////////////////////////////////////////////////////////
+
+
+InsetMathFrac::InsetMathFrac(Kind kind, InsetMath::idx_type ncells)
+	: InsetMathFracBase(ncells), kind_(kind)
 {}
 
 
-auto_ptr<InsetBase> InsetMathFrac::doClone() const
+Inset * InsetMathFrac::clone() const
 {
-	return auto_ptr<InsetBase>(new InsetMathFrac(*this));
+	return new InsetMathFrac(*this);
 }
 
 
@@ -51,74 +81,185 @@ InsetMathFrac const * InsetMathFrac::asFracInset() const
 }
 
 
-bool InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
+bool InsetMathFrac::idxForward(Cursor & cur) const
 {
-	FracChanger dummy(mi.base);
-	cell(0).metrics(mi);
-	cell(1).metrics(mi);
-	if (kind_ == NICEFRAC) {
-		dim.wid = cell(0).width() + cell(1).width() + 5;
-		dim.asc = cell(0).height() + 5;
-		dim.des = cell(1).height() - 5;
+	InsetMath::idx_type target = 0;
+	if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
+		if (nargs() == 3)
+			target = 0;
+		else if (nargs() == 2)
+			target = 1;
+	} else
+		return false;
+	if (cur.idx() == target)
+		return false;
+	cur.idx() = target;
+	cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
+	return true;
+}
+
+
+bool InsetMathFrac::idxBackward(Cursor & cur) const
+{
+	InsetMath::idx_type target = 0;
+	if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
+		if (nargs() == 3)
+			target = 2;
+		else if (nargs() == 2)
+			target = 0;
+	} else
+		return false;
+	if (cur.idx() == target)
+		return false;
+	cur.idx() = target;
+	cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
+	return true;
+}
+
+
+void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	Dimension dim0, dim1, dim2;
+
+	if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
+		if (nargs() == 1) {
+			ShapeChanger dummy2(mi.base.font, UP_SHAPE);
+			cell(0).metrics(mi, dim0);
+			dim.wid = dim0.width()+ 3;
+			dim.asc = dim0.asc;
+			dim.des = dim0.des;
+		} else if (nargs() == 2) {
+			cell(0).metrics(mi, dim0);
+			ShapeChanger dummy2(mi.base.font, UP_SHAPE);
+			cell(1).metrics(mi, dim1);
+			dim.wid = dim0.width() + dim1.wid + 5;
+			dim.asc = max(dim0.asc, dim1.asc);
+			dim.des = max(dim0.des, dim1.des);
+		} else {
+			cell(2).metrics(mi, dim2);
+			ShapeChanger dummy2(mi.base.font, UP_SHAPE);
+			FracChanger dummy(mi.base);
+			cell(0).metrics(mi, dim0);
+			cell(1).metrics(mi, dim1);
+			dim.wid = dim0.width() + dim1.wid + dim2.wid + 10;
+			dim.asc = max(dim2.asc, dim0.height() + 5);
+			dim.des = max(dim2.des, dim1.height() - 5);
+		}
 	} else {
-		dim.wid = max(cell(0).width(), cell(1).width()) + 2;
-		dim.asc = cell(0).height() + 2 + 5;
-		dim.des = cell(1).height() + 2 - 5;
+		FracChanger dummy(mi.base);
+		cell(0).metrics(mi, dim0);
+		cell(1).metrics(mi, dim1);
+		if (nargs() == 3)
+			cell(2).metrics(mi, dim2);
+
+		if (kind_ == NICEFRAC) {
+			dim.wid = dim0.width() + dim1.wid + 5;
+			dim.asc = dim0.height() + 5;
+			dim.des = dim1.height() - 5;
+		} else if (kind_ == UNITFRAC) {
+			ShapeChanger dummy2(mi.base.font, UP_SHAPE);
+			dim.wid = dim0.width() + dim1.wid + 5;
+			dim.asc = dim0.height() + 5;
+			dim.des = dim1.height() - 5;
+		} else {
+			dim.wid = max(dim0.width(), dim1.wid) + 2;
+			dim.asc = dim0.height() + 2 + 5;
+			dim.des = dim1.height() + 2 - 5;
+		}
 	}
 	metricsMarkers(dim);
-	if (dim_ == dim)
-		return false;
-	dim_ = dim;
-	return true;
 }
 
 
 void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
 {
 	setPosCache(pi, x, y);
-	int m = x + dim_.wid / 2;
-	FracChanger dummy(pi.base);
-	if (kind_ == NICEFRAC) {
-		cell(0).draw(pi, x + 2, 
-				y - cell(0).descent() - 5);
-		cell(1).draw(pi, x + cell(0).width() + 5,
-				y + cell(1).ascent() / 2);
-		pi.pain.line(x + cell(0).width(), 
-				y + dim_.des - 2, 
-				x + cell(0).width() + 5, 
-				y - dim_.asc + 2, Color::math);
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const dim0 = cell(0).dimension(*pi.base.bv);
+	int m = x + dim.wid / 2;
+	if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
+		if (nargs() == 1) {
+			ShapeChanger dummy2(pi.base.font, UP_SHAPE);
+			cell(0).draw(pi, x + 1, y);
+		} else if (nargs() == 2) {
+			cell(0).draw(pi, x + 1, y);
+			ShapeChanger dummy2(pi.base.font, UP_SHAPE);
+			cell(1).draw(pi, x + dim0.width() + 5, y);
+		} else {
+			cell(2).draw(pi, x + 1, y);
+			ShapeChanger dummy2(pi.base.font, UP_SHAPE);
+			FracChanger dummy(pi.base);
+			Dimension const dim1 = cell(1).dimension(*pi.base.bv);
+			Dimension const dim2 = cell(2).dimension(*pi.base.bv);
+			int xx = x + dim2.wid + 5;
+			cell(0).draw(pi, xx + 2, 
+					 y - dim0.des - 5);
+			cell(1).draw(pi, xx  + dim0.width() + 5, 
+					 y + dim1.asc / 2);
+		}
 	} else {
-		cell(0).draw(pi, m - cell(0).width() / 2, 
-				y - cell(0).descent() - 2 - 5);
-		cell(1).draw(pi, m - cell(1).width() / 2,
-				y + cell(1).ascent()  + 2 - 5);
+		FracChanger dummy(pi.base);
+		Dimension const dim1 = cell(1).dimension(*pi.base.bv);
+		if (kind_ == NICEFRAC) {
+			cell(0).draw(pi, x + 2,
+					y - dim0.des - 5);
+			cell(1).draw(pi, x + dim0.width() + 5,
+					y + dim1.asc / 2);
+		} else if (kind_ == UNITFRAC) {
+			ShapeChanger dummy2(pi.base.font, UP_SHAPE);
+			cell(0).draw(pi, x + 2,
+					y - dim0.des - 5);
+			cell(1).draw(pi, x + dim0.width() + 5,
+					y + dim1.asc / 2);
+		} else {
+			// Classical fraction
+			cell(0).draw(pi, m - dim0.width() / 2,
+					y - dim0.des - 2 - 5);
+			cell(1).draw(pi, m - dim1.wid / 2,
+					y + dim1.asc  + 2 - 5);
+		}
+	}
+	if (kind_ == NICEFRAC || kind_ == UNITFRAC) {
+		// Diag line:
+		int xx = x;
+		if (nargs() == 3)
+			xx += cell(2).dimension(*pi.base.bv).wid + 5;
+
+		pi.pain.line(xx + dim0.wid,
+				y + dim.des - 2,
+				xx + dim0.wid + 5,
+				y - dim.asc + 2, Color_math);
 	}
 	if (kind_ == FRAC || kind_ == OVER)
-		pi.pain.line(x + 1, y - 5, 
-				x + dim_.wid - 2, y - 5, Color::math);
+		pi.pain.line(x + 1, y - 5,
+				x + dim.wid - 2, y - 5, Color_math);
 	drawMarkers(pi, x, y);
 }
 
 
 void InsetMathFrac::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 {
-	cell(0).metricsT(mi, dim);
-	cell(1).metricsT(mi, dim);
-	dim.wid = max(cell(0).width(), cell(1).width());
-	dim.asc = cell(0).height() + 1;
-	dim.des = cell(1).height();
-	//dim = dim_;
+	Dimension dim0, dim1;
+	cell(0).metricsT(mi, dim0);
+	cell(1).metricsT(mi, dim1);
+	dim.wid = max(dim0.width(), dim1.wid);
+	dim.asc = dim0.height() + 1;
+	dim.des = dim1.height();
 }
 
 
-void InsetMathFrac::drawT(TextPainter & pain, int x, int y) const
+void InsetMathFrac::drawT(TextPainter & /*pain*/, int /*x*/, int /*y*/) const
 {
-	int m = x + dim_.width() / 2;
-	cell(0).drawT(pain, m - cell(0).width() / 2, y - cell(0).descent() - 1);
-	cell(1).drawT(pain, m - cell(1).width() / 2, y + cell(1).ascent());
+	// FIXME: BROKEN!
+	/*
+	Dimension dim;
+	int m = x + dim.width() / 2;
+	cell(0).drawT(pain, m - dim0.width() / 2, y - dim0.des - 1);
+	cell(1).drawT(pain, m - dim1.wid / 2, y + dim1.asc);
 	// ASCII art: ignore niceties
-	if (kind_ == FRAC || kind_ == OVER || kind_ == NICEFRAC)
-		pain.horizontalLine(x, y, dim_.width());
+	if (kind_ == FRAC || kind_ == OVER || kind_ == NICEFRAC || kind_ == UNITFRAC)
+		pain.horizontalLine(x, y, dim.width());
+	*/
 }
 
 
@@ -134,7 +275,17 @@ void InsetMathFrac::write(WriteStream & os) const
 		break;
 	case FRAC:
 	case NICEFRAC:
-		InsetMathNest::write(os);
+	case UNITFRAC:
+		if (nargs() == 2)
+			InsetMathNest::write(os);
+		else
+			os << "\\unitfrac[" << cell(2) << "]{" << cell(0) << "}{" << cell(1) << '}';
+		break;
+	case UNIT:
+		if (nargs() == 2)
+			os << "\\unit[" << cell(0) << "]{" << cell(1) << '}';
+		else
+			os << "\\unit{" << cell(0) << '}';
 		break;
 	}
 }
@@ -149,6 +300,10 @@ docstring InsetMathFrac::name() const
 		return from_ascii("over");
 	case NICEFRAC:
 		return from_ascii("nicefrac");
+	case UNITFRAC:
+		return from_ascii("unitfrac");
+	case UNIT:
+		return from_ascii("unit");
 	case ATOP:
 		return from_ascii("atop");
 	}
@@ -189,11 +344,362 @@ void InsetMathFrac::mathmlize(MathStream & os) const
 
 void InsetMathFrac::validate(LaTeXFeatures & features) const
 {
-	if (kind_ == NICEFRAC)
-		features.require("nicefrac");
+	if (kind_ == NICEFRAC || kind_ == UNITFRAC || kind_ == UNIT)
+		features.require("units");
 	InsetMathNest::validate(features);
 }
 
 
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathDFrac
+//
+/////////////////////////////////////////////////////////////////////
+
+
+Inset * InsetMathDFrac::clone() const
+{
+	return new InsetMathDFrac(*this);
+}
+
+
+void InsetMathDFrac::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	Dimension dim0, dim1;
+	cell(0).metrics(mi, dim0);
+	cell(1).metrics(mi, dim1);
+	dim.wid = max(dim0.wid, dim1.wid) + 2;
+	dim.asc = dim0.height() + 2 + 5;
+	dim.des = dim1.height() + 2 - 5;
+}
+
+
+void InsetMathDFrac::draw(PainterInfo & pi, int x, int y) const
+{
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+	Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+	int m = x + dim.wid / 2;
+	cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 2 - 5);
+	cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc  + 2 - 5);
+	pi.pain.line(x + 1, y - 5, x + dim.wid - 2, y - 5, Color_math);
+	setPosCache(pi, x, y);
+}
+
+
+docstring InsetMathDFrac::name() const
+{
+	return from_ascii("dfrac");
+}
+
+
+void InsetMathDFrac::mathmlize(MathStream & os) const
+{
+	os << MTag("mdfrac") << cell(0) << cell(1) << ETag("mdfrac");
+}
+
+
+void InsetMathDFrac::validate(LaTeXFeatures & features) const
+{
+	features.require("amsmath");
+	InsetMathNest::validate(features);
+}
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathTFrac
+//
+/////////////////////////////////////////////////////////////////////
+
+
+Inset * InsetMathTFrac::clone() const
+{
+	return new InsetMathTFrac(*this);
+}
+
+
+void InsetMathTFrac::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	StyleChanger dummy(mi.base, LM_ST_SCRIPT);
+	Dimension dim0;
+	cell(0).metrics(mi, dim0);
+	Dimension dim1;
+	cell(1).metrics(mi, dim1);
+	dim.wid = max(dim0.width(), dim1.width()) + 2;
+	dim.asc = dim0.height() + 2 + 5;
+	dim.des = dim1.height() + 2 - 5;
+}
+
+
+void InsetMathTFrac::draw(PainterInfo & pi, int x, int y) const
+{
+	StyleChanger dummy(pi.base, LM_ST_SCRIPT);
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+	Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+	int m = x + dim.wid / 2;
+	cell(0).draw(pi, m - dim0.width() / 2, y - dim0.descent() - 2 - 5);
+	cell(1).draw(pi, m - dim1.width() / 2, y + dim1.ascent()  + 2 - 5);
+	pi.pain.line(x + 1, y - 5, x + dim.wid - 2, y - 5, Color_math);
+	setPosCache(pi, x, y);
+}
+
+
+docstring InsetMathTFrac::name() const
+{
+	return from_ascii("tfrac");
+}
+
+
+void InsetMathTFrac::mathmlize(MathStream & os) const
+{
+	os << MTag("mtfrac") << cell(0) << cell(1) << ETag("mtfrac");
+}
+
+
+void InsetMathTFrac::validate(LaTeXFeatures & features) const
+{
+	features.require("amsmath");
+	InsetMathNest::validate(features);
+}
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathBinom
+//
+/////////////////////////////////////////////////////////////////////
+
+
+InsetMathBinom::InsetMathBinom(Kind kind)
+	: kind_(kind)
+{}
+
+
+Inset * InsetMathBinom::clone() const
+{
+	return new InsetMathBinom(*this);
+}
+
+
+int InsetMathBinom::dw(int height) const
+{
+	int w = height / 5;
+	if (w > 15)
+		w = 15;
+	if (w < 6)
+		w = 6;
+	return w;
+}
+
+
+void InsetMathBinom::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	FracChanger dummy(mi.base);
+	Dimension dim0, dim1;
+	cell(0).metrics(mi, dim0);
+	cell(1).metrics(mi, dim1);
+	dim.asc = dim0.height() + 4 + 5;
+	dim.des = dim1.height() + 4 - 5;
+	dim.wid = max(dim0.width(), dim1.wid) + 2 * dw(dim.height()) + 4;
+	metricsMarkers2(dim);
+}
+
+
+void InsetMathBinom::draw(PainterInfo & pi, int x, int y) const
+{
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+	Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+	docstring const bra = kind_ == BRACE ? from_ascii("{") :
+			      kind_ == BRACK ? from_ascii("[") : from_ascii("(");
+	docstring const ket = kind_ == BRACE ? from_ascii("}") :
+			      kind_ == BRACK ? from_ascii("]") : from_ascii(")");
+	int m = x + dim.width() / 2;
+	FracChanger dummy(pi.base);
+	cell(0).draw(pi, m - dim0.width() / 2, y - dim0.des - 3 - 5);
+	cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc  + 3 - 5);
+	mathed_draw_deco(pi, x, y - dim.ascent(), dw(dim.height()), dim.height(), bra);
+	mathed_draw_deco(pi, x + dim.width() - dw(dim.height()), y - dim.ascent(),
+		dw(dim.height()), dim.height(), ket);
+	drawMarkers2(pi, x, y);
+}
+
+
+bool InsetMathBinom::extraBraces() const
+{
+	return kind_ == CHOOSE || kind_ == BRACE || kind_ == BRACK;
+}
+
+
+void InsetMathBinom::write(WriteStream & os) const
+{
+	switch (kind_) {
+	case BINOM:
+		os << "\\binom{" << cell(0) << "}{" << cell(1) << '}';
+		break;
+	case CHOOSE:
+		os << '{' << cell(0) << " \\choose " << cell(1) << '}';
+		break;
+	case BRACE:
+		os << '{' << cell(0) << " \\brace " << cell(1) << '}';
+		break;
+	case BRACK:
+		os << '{' << cell(0) << " \\brack " << cell(1) << '}';
+		break;
+	}
+}
+
+
+void InsetMathBinom::normalize(NormalStream & os) const
+{
+	os << "[binom " << cell(0) << ' ' << cell(1) << ']';
+}
+
+
+void InsetMathBinom::validate(LaTeXFeatures & features) const
+{
+	if (kind_ == BINOM) {
+		features.require("binom");
+		InsetMathNest::validate(features);
+	}
+}
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathDBinom
+//
+/////////////////////////////////////////////////////////////////////
+
+Inset * InsetMathDBinom::clone() const
+{
+	return new InsetMathDBinom(*this);
+}
+
+
+int InsetMathDBinom::dw(int height) const
+{
+	int w = height / 5;
+	if (w > 15)
+		w = 15;
+	if (w < 6)
+		w = 6;
+	return w;
+}
+
+
+void InsetMathDBinom::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	Dimension dim0, dim1;
+	cell(0).metrics(mi, dim0);
+	cell(1).metrics(mi, dim1);
+	dim.asc = dim0.height() + 4 + 5;
+	dim.des = dim1.height() + 4 - 5;
+	dim.wid = max(dim0.width(), dim1.wid) + 2 * dw(dim.height()) + 4;
+	metricsMarkers2(dim);
+}
+
+
+void InsetMathDBinom::draw(PainterInfo & pi, int x, int y) const
+{
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+	Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+	int m = x + dim.width() / 2;
+	cell(0).draw(pi, m - dim0.width() / 2, y - dim0.des - 3 - 5);
+	cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc  + 3 - 5);
+	mathed_draw_deco(pi, x, y - dim.ascent(), dw(dim.height()), dim.height(), from_ascii("("));
+	mathed_draw_deco(pi, x + dim.width() - dw(dim.height()), y - dim.ascent(),
+		dw(dim.height()), dim.height(), from_ascii(")"));
+	drawMarkers2(pi, x, y);
+}
+
+
+docstring InsetMathDBinom::name() const
+{
+	return from_ascii("dbinom");
+}
+
+void InsetMathDBinom::mathmlize(MathStream & os) const
+{
+	os << MTag("mdbinom") << cell(0) << cell(1) << ETag("mdbinom");
+}
+
+void InsetMathDBinom::validate(LaTeXFeatures & features) const
+{
+	features.require("amsmath");
+	InsetMathNest::validate(features);
+}
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathTBinom
+//
+/////////////////////////////////////////////////////////////////////
+
+Inset * InsetMathTBinom::clone() const
+{
+	return new InsetMathTBinom(*this);
+}
+
+
+int InsetMathTBinom::dw(int height) const
+{
+	int w = height / 5;
+	if (w > 15)
+		w = 15;
+	if (w < 6)
+		w = 6;
+	return w;
+}
+
+
+void InsetMathTBinom::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	StyleChanger dummy(mi.base, LM_ST_SCRIPT);
+	Dimension dim0, dim1;
+	cell(0).metrics(mi, dim0);
+	cell(1).metrics(mi, dim1);
+	dim.asc = dim0.height() + 4 + 5;
+	dim.des = dim1.height() + 4 - 5;
+	dim.wid = max(dim0.width(), dim1.wid) + 2 * dw(dim.height()) + 4;
+	metricsMarkers2(dim);
+}
+
+
+void InsetMathTBinom::draw(PainterInfo & pi, int x, int y) const
+{
+	StyleChanger dummy(pi.base, LM_ST_SCRIPT);
+	Dimension const dim = dimension(*pi.base.bv);
+	Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+	Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+	int m = x + dim.width() / 2;
+	cell(0).draw(pi, m - dim0.width() / 2, y - dim0.des - 3 - 5);
+	cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc  + 3 - 5);
+	mathed_draw_deco(pi, x, y - dim.ascent(), dw(dim.height()), dim.height(), from_ascii("("));
+	mathed_draw_deco(pi, x + dim.width() - dw(dim.height()), y - dim.ascent(),
+		dw(dim.height()), dim.height(), from_ascii(")"));
+	drawMarkers2(pi, x, y);
+}
+
+
+docstring InsetMathTBinom::name() const
+{
+	return from_ascii("tbinom");
+}
+
+void InsetMathTBinom::mathmlize(MathStream & os) const
+{
+	os << MTag("mtbinom") << cell(0) << cell(1) << ETag("mtbinom");
+}
+
+void InsetMathTBinom::validate(LaTeXFeatures & features) const
+{
+	features.require("amsmath");
+	InsetMathNest::validate(features);
+}
 
 } // namespace lyx