try to suppress unneeded spaces when writing

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5069 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/math_inset.C

@@ -209,7 +209,8 @@ void MathInset::drawT(TextPainter &, int, int) const
 
 void MathInset::write(WriteStream & os) const
 {
-	os << '\\' << name().c_str() << ' ';
+	os << '\\' << name().c_str();
+	os.pendingSpace(true);
 }
 
 

src/mathed/math_mathmlstream.C

@@ -11,6 +11,77 @@ using std::ostream;
 using std::strlen;
 
 
+WriteStream::WriteStream(ostream & os, bool fragile, bool latex)
+	: os_(os), fragile_(fragile), firstitem_(false), latex_(latex),
+	  pendingspace_(false), line_(0)
+{}
+
+
+WriteStream::WriteStream(ostream & os)
+	: os_(os), fragile_(false), firstitem_(false), latex_(false),
+	  pendingspace_(false), line_(0)
+{}
+
+
+void WriteStream::addlines(unsigned int n)
+{
+	line_ += n;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, MathAtom const & at)
+{
+	at->write(ws);
+	return ws;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, MathArray const & ar)
+{
+	write(ar, ws);
+	return ws;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, char const * s)
+{
+	ws.os() << s;
+	ws.addlines(int(lyx::count(s, s + strlen(s), '\n')));
+	return ws;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, char c)
+{
+	if (ws.pendingSpace()) {
+		if (isalpha(c))
+			ws.os() << ' ';
+		ws.pendingSpace(false);
+	}
+	ws.os() << c;
+	if (c == '\n')
+		ws.addlines(1);
+	return ws;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, int i)
+{
+	ws.os() << i;
+	return ws;
+}
+
+
+WriteStream & operator<<(WriteStream & ws, unsigned int i)
+{
+	ws.os() << i;
+	return ws;
+}
+
+
+//////////////////////////////////////////////////////////////////////
+
+
 MathMLStream::MathMLStream(ostream & os)
 	: os_(os), tab_(0), line_(0), lastchar_(0)
 {}
@@ -228,63 +299,3 @@ NormalStream & operator<<(NormalStream & ns, int i)
 
 //////////////////////////////////////////////////////////////////////
 
-
-WriteStream::WriteStream(ostream & os, bool fragile, bool latex)
-	: os_(os), fragile_(fragile), latex_(latex), firstitem_(false), line_(0)
-{}
-
-
-WriteStream::WriteStream(ostream & os)
-	: os_(os), fragile_(false), latex_(false), firstitem_(false), line_(0)
-{}
-
-
-void WriteStream::addlines(unsigned int n)
-{
-	line_ += n;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, MathAtom const & at)
-{
-	at->write(ws);
-	return ws;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, MathArray const & ar)
-{
-	write(ar, ws);
-	return ws;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, char const * s)
-{
-	ws.os() << s;
-	ws.addlines(int(lyx::count(s, s + strlen(s), '\n')));
-	return ws;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, char c)
-{
-	ws.os() << c;
-	if (c == '\n')
-		ws.addlines(1);
-	return ws;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, int i)
-{
-	ws.os() << i;
-	return ws;
-}
-
-
-WriteStream & operator<<(WriteStream & ws, unsigned int i)
-{
-	ws.os() << i;
-	return ws;
-}

src/mathed/math_mathmlstream.h

@@ -14,6 +14,61 @@ class MathArray;
 class MathInset;
 class MathAtom;
 
+//
+// LaTeX/LyX
+//
+
+class WriteStream {
+public:
+	///
+	WriteStream(std::ostream & os, bool fragile, bool latex);
+	///
+	explicit WriteStream(std::ostream & os_);
+	///
+	int line() const { return line_; }
+	///
+	bool fragile() const { return fragile_; }
+	///
+	bool latex() const { return latex_; }
+	///
+	std::ostream & os() { return os_; }
+	///
+	bool & firstitem() { return firstitem_; }
+	///
+	void addlines(unsigned int);
+	/// writes space if next thing is isalpha()
+	void pendingSpace(bool how) { pendingspace_ = how; }
+	/// writes space if next thing is isalpha()
+	bool pendingSpace() const { return pendingspace_; }
+private:
+	///
+	std::ostream & os_;
+	/// do we have to write \\protect sometimes
+	bool fragile_;
+	/// are we at the beginning of an MathArray?
+	bool firstitem_;
+	/// are we writing to .tex?
+	int latex_;
+	/// do we have a space pending?
+	bool pendingspace_;
+	///
+	int line_;
+};
+
+///
+WriteStream & operator<<(WriteStream &, MathAtom const &);
+///
+WriteStream & operator<<(WriteStream &, MathArray const &);
+///
+WriteStream & operator<<(WriteStream &, char const *);
+///
+WriteStream & operator<<(WriteStream &, char);
+///
+WriteStream & operator<<(WriteStream &, int);
+///
+WriteStream & operator<<(WriteStream &, unsigned int);
+
+
 
 //
 //  MathML
@@ -189,52 +244,4 @@ OctaveStream & operator<<(OctaveStream &, int);
 
 
 
-//
-// LaTeX/LyX
-//
-
-class WriteStream {
-public:
-	///
-	WriteStream(std::ostream & os, bool fragile, bool latex);
-	///
-	explicit WriteStream(std::ostream & os_);
-	///
-	int line() const { return line_; }
-	///
-	bool fragile() const { return fragile_; }
-	///
-	bool latex() const { return latex_; }
-	///
-	std::ostream & os() { return os_; }
-	///
-	bool & firstitem() { return firstitem_; }
-	///
-	void addlines(unsigned int);
-private:
-	///
-	std::ostream & os_;
-	///
-	bool fragile_;
-	/// are we writing to .tex?
-	int latex_;
-	/// are we at the beginning of an MathArray?
-	bool firstitem_;
-	///
-	int line_;
-};
-
-///
-WriteStream & operator<<(WriteStream &, MathAtom const &);
-///
-WriteStream & operator<<(WriteStream &, MathArray const &);
-///
-WriteStream & operator<<(WriteStream &, char const *);
-///
-WriteStream & operator<<(WriteStream &, char);
-///
-WriteStream & operator<<(WriteStream &, int);
-///
-WriteStream & operator<<(WriteStream &, unsigned int);
-
 #endif

src/mathed/math_nestinset.C

@@ -293,10 +293,12 @@ void MathNestInset::write(WriteStream & os) const
 	os << '\\' << name().c_str();
 	for (unsigned i = 0; i < nargs(); ++i)
 		os << '{' << cell(i) << '}';
-	if (lock_ && !os.latex())
-		os << "\\lyxlock ";
 	if (nargs() == 0)
-		os << ' ';
+		os.pendingSpace(true);
+	if (lock_ && !os.latex()) {
+		os << "\\lyxlock";
+		os.pendingSpace(true);
+	}
 }
 
 

src/mathed/math_parser.C

@@ -648,8 +648,10 @@ void Parser::parse1(MathGridInset & grid, unsigned flags,
 		else if (t.cat() == catLetter)
 			cell->push_back(MathAtom(new MathCharInset(t.character())));
 
-		else if (t.cat() == catSpace && mode != MathInset::MATH_MODE)
+		else if (t.cat() == catSpace && mode != MathInset::MATH_MODE) {
-			cell->push_back(MathAtom(new MathCharInset(t.character())));
+			if (cell->empty() || cell->back()->getChar() != ' ')
+				cell->push_back(MathAtom(new MathCharInset(t.character())));
+		}
 
 		else if (t.cat() == catNewline && mode != MathInset::MATH_MODE)
 			cell->push_back(MathAtom(new MathCharInset(t.character())));

src/mathed/math_spaceinset.C

@@ -111,6 +111,8 @@ void MathSpaceInset::normalize(NormalStream & os) const
 
 void MathSpaceInset::write(WriteStream & os) const
 {
-	if (space_ >= 0 && space_ < nSpace)
+	if (space_ >= 0 && space_ < nSpace) {
-		os << '\\' << latex_mathspace[space_] << ' ';
+		os << '\\' << latex_mathspace[space_];
+		os.pendingSpace(true);
+	}
 }

src/mathed/math_symbolinset.C

@@ -170,7 +170,8 @@ void MathSymbolInset::octavize(OctaveStream & os) const
 
 void MathSymbolInset::write(WriteStream & os) const
 {
-	os << '\\' << name() << ' ';
+	os << '\\' << name();
+	os.pendingSpace(true);
 }