From 4479a7f689d5fadc741f7798f85fec540d4970ea Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Thu, 31 Dec 2009 18:37:09 +0000
Subject: [PATCH] A simple version of ModeSpecifier for MathStream.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@32702 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/MathStream.cpp |  2 +-
 src/mathed/MathStream.h   | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/mathed/MathStream.cpp b/src/mathed/MathStream.cpp
index ac511dd917..a638052a87 100644
--- a/src/mathed/MathStream.cpp
+++ b/src/mathed/MathStream.cpp
@@ -246,7 +246,7 @@ WriteStream & operator<<(WriteStream & ws, unsigned int i)
 
 
 MathStream::MathStream(odocstream & os)
-	: os_(os), tab_(0), line_(0), lastchar_(0)
+	: os_(os), tab_(0), line_(0), lastchar_(0), in_text_(false)
 {}
 
 
diff --git a/src/mathed/MathStream.h b/src/mathed/MathStream.h
index c2eb3d2326..8dc9c4628d 100644
--- a/src/mathed/MathStream.h
+++ b/src/mathed/MathStream.h
@@ -242,6 +242,7 @@ public:
 	char const * const tag_;
 };
 
+
 class MathStream {
 public:
 	///
@@ -262,6 +263,12 @@ public:
 	void defer(std::string const &);
 	///
 	docstring deferred() const;
+	///
+	void setTextMode() { in_text_ = true; }
+	///
+	void setMathMode() { in_text_ = false; }
+	///
+	bool inText() const { return in_text_; }
 private:
 	///
 	odocstream & os_;
@@ -272,6 +279,8 @@ private:
 	///
 	char lastchar_;
 	///
+	bool in_text_;
+	///
 	odocstringstream deferred_;
 };
 
@@ -293,6 +302,34 @@ MathStream & operator<<(MathStream &, MTag const &);
 MathStream & operator<<(MathStream &, ETag const &);
 
 
+// A simpler version of ModeSpecifier, for MathML
+class SetMode {
+public:
+	///
+	explicit SetMode(MathStream & os, bool text)
+		: os_(os)
+	{
+		was_text_ = os.inText();
+		if (text)
+			os.setTextMode();
+		else
+			os.setMathMode();
+	}
+	///
+	~SetMode()
+	{
+		if (was_text_)
+			os_.setTextMode();
+		else
+			os_.setMathMode();
+	}
+private:
+	///
+	MathStream & os_;
+	///
+	bool was_text_;
+};
+
 
 //
 // Debugging
-- 
2.39.5