read/write support for the AMS split environment

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2688 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/Makefile.am

@@ -80,6 +80,8 @@ libmathed_la_SOURCES = \
 	math_spaceinset.h \
 	math_specialcharinset.C \
 	math_specialcharinset.h \
+	math_splitinset.C \
+	math_splitinset.h \
 	math_sqrtinset.C \
 	math_sqrtinset.h \
 	math_stackrelinset.C \

src/mathed/math_gridinset.C

@@ -24,6 +24,7 @@ MathGridInset::RowInfo::RowInfo()
 {}
 
 
+
 int MathGridInset::RowInfo::skipPixels() const
 {
 #ifdef WITH_WARNINGS
@@ -46,10 +47,7 @@ MathGridInset::MathGridInset(int m, int n)
 		lyxerr << "positve number of columns expected\n";
 	if (n <= 0)
 		lyxerr << "positve number of rows expected\n";
-	for (int col = 0; col < m; ++col) {
-		colinfo_[col].skip_  = defaultColSpace(col);
-		colinfo_[col].align_ = defaultColAlign(col);
-	}
+	setDefaults();
 }
 
 
@@ -59,6 +57,14 @@ int MathGridInset::index(int row, int col) const
 }
 
 
+void MathGridInset::setDefaults()
+{
+	for (int col = 0; col < ncols(); ++col) {
+		colinfo_[col].align_ = defaultColAlign(col);
+		colinfo_[col].skip_  = defaultColSpace(col);
+	}
+}
+
 
 void MathGridInset::halign(string const & hh)
 {

src/mathed/math_gridinset.h

@@ -138,6 +138,8 @@ public:
 	virtual int defaultColSpace(int) { return 10; }
 	///
 	virtual char defaultColAlign(int) { return 'c'; }
+	///
+	void setDefaults();
 
 protected:
 	/// returns proper 'end of line' code for LaTeX

src/mathed/math_matrixinset.C

@@ -108,15 +108,6 @@ int MathMatrixInset::defaultColSpace(int col)
 }
 
 
-void MathMatrixInset::setDefaults()
-{
-	for (int col = 0; col < ncols(); ++col) {
-		colinfo_[col].align_ = defaultColAlign(col);
-		colinfo_[col].skip_  = defaultColSpace(col);
-	}
-}
-
-
 void MathMatrixInset::metrics(MathStyles) const
 {
 	size_ = (getType() == LM_OT_SIMPLE) ? LM_ST_TEXT : LM_ST_DISPLAY;

src/mathed/math_matrixinset.h

@@ -76,8 +76,6 @@ public:
 	MathInsetTypes getType() const;
 
 private:
-	///
-	void setDefaults();
 	///
 	void setType(MathInsetTypes t);
 	///

src/mathed/math_parser.C

@@ -40,6 +40,7 @@
 #include "math_sqrtinset.h"
 #include "math_scriptinset.h"
 #include "math_specialcharinset.h"
+#include "math_splitinset.h"
 #include "math_sqrtinset.h"
 #include "debug.h"
 #include "support.h"
@@ -825,6 +826,10 @@ void Parser::parse_into(MathArray & array, unsigned flags, MathTextCodes code)
 				m->halign(halign);
 				parse_lines(m, false, false);
 				array.push_back(m);
+			} else if (name == "split") {
+				MathSplitInset * m = new MathSplitInset(1);
+				parse_lines(m, false, false);
+				array.push_back(m);
 			} else 
 				lyxerr[Debug::MATHED] << "unknow math inset begin '" << name << "'\n";	
 		}

src/mathed/math_splitinset.C

@@ -0,0 +1,31 @@
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include "math_splitinset.h"
+#include "support/LOstream.h"
+
+
+MathSplitInset::MathSplitInset(int n)
+	: MathGridInset(2, n)
+{
+	setDefaults();
+}
+
+
+MathInset * MathSplitInset::clone() const
+{
+	return new MathSplitInset(*this);
+}
+
+
+void MathSplitInset::write(std::ostream & os, bool fragile) const
+{
+	if (fragile)
+		os << "\\protect";
+	os << "\\begin{split}";
+	MathGridInset::write(os, fragile);
+	if (fragile)
+		os << "\\protect";
+	os << "\\end{split}\n";
+}

src/mathed/math_splitinset.h

@@ -0,0 +1,26 @@
+// -*- C++ -*-
+#ifndef MATH_SPLITINSET_H
+#define MATH_SPLITINSET_H
+
+#include "math_gridinset.h"
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+
+class MathSplitInset : public MathGridInset {
+public: 
+	///
+	explicit MathSplitInset(int n);
+	///
+	MathInset * clone() const;
+	///
+	void write(std::ostream &, bool fragile) const;
+	///
+	int defaultColSpace(int) { return 0; }
+	///
+	char defaultColAlign(int) { return 'l'; }
+};
+
+#endif