From e5e39c1884914867257d409732922be2c194d409 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20P=C3=B6nitz?= <poenitz@gmx.net>
Date: Thu, 7 Feb 2002 09:47:21 +0000
Subject: [PATCH] bugfix: in some cases the parser created unecessary extra
 braces

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3499 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/math_braceinset.h |  2 ++
 src/mathed/math_inset.h      |  2 ++
 src/mathed/math_parser.C     | 18 +++++++++++++++++-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/mathed/math_braceinset.h b/src/mathed/math_braceinset.h
index 6a9c086575..88031d383f 100644
--- a/src/mathed/math_braceinset.h
+++ b/src/mathed/math_braceinset.h
@@ -20,6 +20,8 @@ public:
 	///
 	MathInset * clone() const;
 	///
+	MathBraceInset * asBraceInset() { return this; }
+	///
 	void draw(Painter &, int x, int y) const;
 	///
 	void write(WriteStream & os) const;
diff --git a/src/mathed/math_inset.h b/src/mathed/math_inset.h
index 015d15df79..42957a9b6e 100644
--- a/src/mathed/math_inset.h
+++ b/src/mathed/math_inset.h
@@ -47,6 +47,7 @@ inclusion in the "real LyX insets" FormulaInset and FormulaMacroInset.
 
 
 class MathArrayInset;
+class MathBraceInset;
 class MathBoxInset;
 class MathCharInset;
 class MathDelimInset;
@@ -176,6 +177,7 @@ public:
 
 	/// identifies certain types of insets
 	virtual MathArrayInset         * asArrayInset()         { return 0; }
+	virtual MathBraceInset         * asBraceInset()         { return 0; }
 	virtual MathBoxInset           * asBoxInset()           { return 0; }
 	virtual MathBoxInset const     * asBoxInset() const     { return 0; }
 	virtual MathCharInset const    * asCharInset() const    { return 0; }
diff --git a/src/mathed/math_parser.C b/src/mathed/math_parser.C
index 4a94e204fa..313d235444 100644
--- a/src/mathed/math_parser.C
+++ b/src/mathed/math_parser.C
@@ -256,6 +256,8 @@ public:
 	void putback();
 
 private:
+	///
+	void parse_into1(MathArray & array, unsigned flags, MathTextCodes);
 	///
 	string getArg(char lf, char rf);
 	///
@@ -521,6 +523,7 @@ void Parser::error(string const & msg)
 }
 
 
+
 bool Parser::parse_lines(MathAtom & t, bool numbered, bool outmost)
 {	
 	MathGridInset * p = t->asGridInset();
@@ -545,7 +548,11 @@ bool Parser::parse_lines(MathAtom & t, bool numbered, bool outmost)
 		for (MathInset::col_type col = 0; col < p->ncols(); ++col) {
 			//lyxerr << "reading cell " << row << " " << col << "\n";
 		
-			parse_into(p->cell(col + row * p->ncols()), FLAG_BLOCK);
+			MathArray & ar = p->cell(col + row * p->ncols());
+			parse_into(ar, FLAG_BLOCK);
+			// remove 'unnecessary' braces:
+			if (ar.size() == 1 && ar.back()->asBraceInset())
+				ar = ar.back()->asBraceInset()->cell(0);
 
 			// break if cell is not followed by an ampersand
 			if (nextToken().cat() != catAlign) {
@@ -824,6 +831,15 @@ bool Parser::parse_normal(MathAtom & matrix)
 
 
 void Parser::parse_into(MathArray & array, unsigned flags, MathTextCodes code)
+{
+	parse_into1(array, flags, code);
+	// remove 'unnecessary' braces:
+	if (array.size() == 1 && array.back()->asBraceInset())
+		array = array.back()->asBraceInset()->cell(0);
+}
+
+
+void Parser::parse_into1(MathArray & array, unsigned flags, MathTextCodes code)
 {
 	bool panic  = false;
 	int  limits = 0;