+/////////////////////////////////////////////////////////////////////
+//
+// InsetMathBinom
+//
+/////////////////////////////////////////////////////////////////////
+
+
+InsetMathBinom::InsetMathBinom(Buffer * buf, Kind kind)
+ : InsetMathFracBase(buf), 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
+{
+ Dimension dim0, dim1;
+
+ // FIXME: for an unknown reason the cells must be set directly
+ // after the StyleChanger and cannot be set after the if case
+ if (kind_ == DBINOM) {
+ StyleChanger dummy(mi.base, LM_ST_DISPLAY);
+ cell(0).metrics(mi, dim0);
+ cell(1).metrics(mi, dim1);
+ } else if (kind_ == TBINOM) {
+ StyleChanger dummy(mi.base, LM_ST_SCRIPT);
+ cell(0).metrics(mi, dim0);
+ cell(1).metrics(mi, dim1);
+ } else {
+ FracChanger dummy(mi.base);
+ 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.wid, 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);
+ // define the binom brackets
+ 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;
+ // FIXME: for an unknown reason the cells must be drawn directly
+ // after the StyleChanger and cannot be drawn after the if case
+ if (kind_ == DBINOM) {
+ StyleChanger dummy(pi.base, LM_ST_DISPLAY);
+ cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
+ cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
+ } else if (kind_ == TBINOM) {
+ StyleChanger dummy(pi.base, LM_ST_SCRIPT);
+ cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
+ cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
+ } else {
+ FracChanger dummy2(pi.base);
+ cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
+ cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
+ }
+ // draw the brackets and the marker
+ 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
+{
+ MathEnsurer ensurer(os);
+ switch (kind_) {
+ case BINOM:
+ os << "\\binom{" << cell(0) << "}{" << cell(1) << '}';
+ break;
+ case DBINOM:
+ os << "\\dbinom{" << cell(0) << "}{" << cell(1) << '}';
+ break;
+ case TBINOM:
+ os << "\\tbinom{" << 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::mathmlize(MathStream & os) const
+{
+ switch (kind_) {
+ case BINOM:
+ os << MTag("mbinom") << cell(0) << cell(1) << ETag("mbinom");
+ break;
+ case TBINOM:
+ os << MTag("mtbinom") << cell(0) << cell(1) << ETag("mtbinom");
+ break;
+ case DBINOM:
+ default:
+ os << MTag("mdbinom") << cell(0) << cell(1) << ETag("mdbinom");
+ break;
+ }
+}
+
+
+void InsetMathBinom::validate(LaTeXFeatures & features) const
+{
+ if (kind_ == BINOM)
+ features.require("binom");
+ if (kind_ == DBINOM || kind_ == TBINOM)
+ features.require("amsmath");
+ InsetMathNest::validate(features);
+}
+