support for \dfrac

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7868 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/ChangeLog

@@ -1,4 +1,9 @@
 
+2003-10-07  André Pönitz  <poenitz@gmx.net>
+
+	* math_dfracinset.[Ch]: support for \dfrac
+	* math_colorinset.[Ch]: support for colors in formulas
+
 2003-10-07  Martin Vermeer  <martin.vermeer@hut.fi>
 
 	* math_macrotable.h: add <string> and other small fixes to make

src/mathed/Makefile.am

@@ -47,6 +47,8 @@ libmathed_la_SOURCES = \
 	math_decorationinset.h \
 	math_deliminset.C \
 	math_deliminset.h \
+	math_dfracinset.C \
+	math_dfracinset.h \
 	math_diffinset.C \
 	math_diffinset.h \
 	math_diminset.C \

src/mathed/math_dfracinset.C

@@ -0,0 +1,73 @@
+/**
+ * \file math_dfracinset.C
+ * 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 "math_dfracinset.h"
+#include "math_data.h"
+#include "math_mathmlstream.h"
+#include "LaTeXFeatures.h"
+#include "LColor.h"
+#include "frontends/Painter.h"
+
+
+using std::string;
+using std::max;
+using std::auto_ptr;
+
+
+MathDfracInset::MathDfracInset()
+	: MathFracInset(false)
+{}
+
+
+auto_ptr<InsetBase> MathDfracInset::clone() const
+{
+	return auto_ptr<InsetBase>(new MathDfracInset(*this));
+}
+
+
+void MathDfracInset::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+	cell(0).metrics(mi);
+	cell(1).metrics(mi);
+	dim_.wid = max(cell(0).width(), cell(1).width()) + 2;
+	dim_.asc = cell(0).height() + 2 + 5;
+	dim_.des = cell(1).height() + 2 - 5;
+	dim = dim_;
+}
+
+
+void MathDfracInset::draw(PainterInfo & pi, int x, int y) const
+{
+	int m = x + dim_.wid / 2;
+	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);
+	pi.pain.line(x + 1, y - 5, x + dim_.wid - 2, y - 5, LColor::math);
+}
+
+
+string MathDfracInset::name() const
+{
+	return "dfrac";
+}
+
+
+void MathDfracInset::mathmlize(MathMLStream & os) const
+{
+	os << MTag("mdfrac") << cell(0) << cell(1) << ETag("mdfrac");
+}
+
+
+void MathDfracInset::validate(LaTeXFeatures & features) const
+{
+	features.require("amsmath");
+	MathNestInset::validate(features);
+}

src/mathed/math_dfracinset.h

@@ -0,0 +1,37 @@
+// -*- C++ -*-
+/**
+ * \file math_fracinset.h
+ * 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.
+ */
+
+#ifndef MATH_DFRACINSET_H
+#define MATH_DFRACINSET_H
+
+#include "math_fracinset.h"
+
+
+/// \dfrac support
+class MathDfracInset : public MathFracInset {
+public:
+	///
+	MathDfracInset();
+	///
+	virtual std::auto_ptr<InsetBase> clone() const;
+	///
+	void metrics(MetricsInfo & mi, Dimension & dim) const;
+	///
+	void draw(PainterInfo &, int x, int y) const;
+	///
+	std::string name() const;
+	///
+	void mathmlize(MathMLStream &) const;
+	///
+	void validate(LaTeXFeatures & features) const;
+};
+
+#endif

src/mathed/math_factory.C

@@ -20,6 +20,7 @@
 #include "math_casesinset.h"
 #include "math_colorinset.h"
 #include "math_decorationinset.h"
+#include "math_dfracinset.h"
 #include "math_dotsinset.h"
 #include "math_ertinset.h"
 #include "math_fboxinset.h"
@@ -311,6 +312,8 @@ MathAtom createMathInset(string const & s)
 		return MathAtom(new MathBoldsymbolInset);
 	if (s == "color")
 		return MathAtom(new MathColorInset);
+	if (s == "dfrac")
+		return MathAtom(new MathDfracInset);
 
 	if (MathMacroTable::has(s))
 		return MathAtom(new MathMacro(s));