improve end-of-line handling in the presence of optional args to \\

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2477 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/math_gridinset.C

@@ -206,17 +206,37 @@ void MathGridInset::draw(Painter & pain, int x, int y) const
 void MathGridInset::write(std::ostream & os, bool fragile) const
 {
 	for (int row = 0; row < nrows(); ++row) {
-		if (row)
-			os << " \\\\\n";
 		for (int col = 0; col < ncols(); ++col) {
-			if (col)
-				os << " & ";
 			cell(index(row, col)).write(os, fragile);
+			os << eocString(row);
 		}
+		os << eolString(row);
 	}
 }
 
 
+string MathGridInset::eolString(int row) const
+{
+	if (row == nrows() - 1)	
+		return "";
+
+	// make sure an upcoming '[' does not break anything
+	MathArray const & c = cell(index(row + 1, 0));
+	if (c.size() && (*c.begin())->getChar() == '[')
+		return "\\\\[0pt]\n";
+
+	return "\\\\\n";
+}
+
+
+string MathGridInset::eocString(int col) const
+{
+	if (col == ncols() - 1)
+		return "";
+	return " & ";
+}
+
+
 void MathGridInset::addRow(int row)
 {
 	rowinfo_.insert(rowinfo_.begin() + row + 1, RowInfo());

src/mathed/math_gridinset.h

@@ -125,6 +125,11 @@ public:
 	std::vector<int> idxBetween(int from, int to) const;
 
 protected:
+	/// returns proper 'end of line' code for LaTeX
+	string eolString(int row) const;
+	/// returns proper 'end of column' code for LaTeX
+	string eocString(int col) const;
+
 	/// row info
 	std::vector<RowInfo> rowinfo_;
 	/// column info

src/mathed/math_matrixinset.C

@@ -141,11 +141,8 @@ void MathMatrixInset::write(std::ostream & os, bool fragile) const
 	bool n = numberedType();
 
 	for (int row = 0; row < nrows(); ++row) {
-		if (row)
-			os << " \\\\\n";
 		for (int col = 0; col < ncols(); ++col) {
-			if (col)
+			os << eocString(col);
-				os << " & ";
 			cell(index(row, col)).write(os, fragile);
 		}
 		if (n) {
@@ -154,6 +151,7 @@ void MathMatrixInset::write(std::ostream & os, bool fragile) const
 			if (nonum_[row])
 				os << "\\nonumber ";
 		}
+		os << eolString(row);
 	}
 
   footer_write(os);

src/mathed/math_parser.C

@@ -303,7 +303,7 @@ int Parser::yylex()
 	
 	while (is_.good()) {
 		unsigned char c = getuchar();
-		//lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
+		lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 		
 		if (lexcode[c] == LexNewLine) {
 			++lineno_; 
@@ -672,6 +672,8 @@ void Parser::parse_into(MathArray & array, unsigned flags)
 			break;
 		
 		case LM_TK_NEWLINE:
+		{
+			lexArg('['); // ignore things like  \\[5pt] for a while
 			if (flags & FLAG_NEWLINE) {
 				flags &= ~FLAG_NEWLINE;
 				--plevel;
@@ -680,6 +682,7 @@ void Parser::parse_into(MathArray & array, unsigned flags)
 			lyxerr[Debug::MATHED]
 				<< "found newline unexpectedly, array: '" << array << "'\n";
 			break;
+		}
 		
 		case LM_TK_PROTECT: 
 			break;