evaluate TargetNumber as a Lua expression

stepmania/src/BGAnimationLayer.cpp

@@ -376,7 +376,7 @@ void BGAnimationLayer::LoadFromNode( const CString& sDir, const XNode* pNode )
 		CString expr;
 		if( pNode->GetAttrValue("Cond",expr) || pNode->GetAttrValue("Condition",expr) )
 		{
-			if( !LUA->RunExpressionB( expr ) )
+			if( !LUA->RunExpressionB(expr) )
 				return;
 		}
 	}
@@ -672,7 +672,8 @@ bool BGAnimationLayer::EarlyAbortDraw()
 	if( m_sDrawCond.empty() )
 		return false;
 
-	if( !LUA->RunExpressionB( m_sDrawCond ) )
+	// TODO: Is it ok to evaluate this every frame? 
+	if( !LUA->RunExpressionB(m_sDrawCond) )
 		return true;
 
 	return false;

stepmania/src/Command.cpp

@@ -34,7 +34,7 @@ Command::Arg Command::GetArg( unsigned index ) const
 Command::Arg::operator CString ()
 {
 	CString sValue = s;
-	LUA->RunAtExpression( sValue );
+	LUA->RunAtExpressionS( sValue );
 	return sValue;
 }
 

stepmania/src/LuaManager.cpp

@@ -364,7 +364,7 @@ bool LuaManager::RunExpressionS( const CString &str, CString &sOut )
 	return true;
 }
 
-bool LuaManager::RunAtExpression( CString &sStr )
+bool LuaManager::RunAtExpressionS( CString &sStr )
 {
 	if( sStr.size() == 0 || sStr[0] != '@' )
 		return false;
@@ -378,6 +378,21 @@ bool LuaManager::RunAtExpression( CString &sStr )
 	return true;
 }
 
+float LuaManager::RunAtExpressionF( const CString &_sStr )
+{
+	if( _sStr.size() == 0 || _sStr[0] != '@' )
+		return 0;
+
+	CString sStr = _sStr;
+
+	/* Erase "@". */
+	sStr.erase( 0, 1 );
+
+	CString sOut;
+	RunExpressionS( sStr, sOut );
+	return atof( sOut );
+}
+
 void LuaManager::Fail( const CString &err )
 {
 	lua_pushstring( L, err );

stepmania/src/LuaManager.h

@@ -30,7 +30,8 @@ public:
 	bool RunExpressionS( const CString &str, CString &sOut );
 
 	/* If sStr begins with @, evaluate the rest as an expression and store the result over sStr. */
-	bool RunAtExpression( CString &sStr );
+	bool RunAtExpressionS( CString &sStr );
+	float RunAtExpressionF( const CString &sStr );
 
 	void Fail( const CString &err );
 

stepmania/src/ProfileManager.cpp

@@ -550,7 +550,7 @@ public:
 		Luna<T>::Register( L );
 
 		// Add global singleton if constructed already.  If it's not constructed yet,
-		// then we'll register it later when we reload the theme just before 
+		// then we'll register it later when we reinit Lua just before 
 		// initializing the display.
 		if( PROFILEMAN )
 		{

stepmania/src/RollingNumbers.cpp

@@ -26,9 +26,12 @@ void RollingNumbers::LoadFromNode( const CString& sDir, const XNode* pNode )
 	pNode->GetAttrValue( "Format", m_sFormat );
 	pNode->GetAttrValue( "ApproachSeconds", m_fApproachSeconds );
 	
-	float fTargetNumber;
-	if( pNode->GetAttrValue( "TargetNumber", fTargetNumber ) )
+	CString sTargetNumber;
+	if( pNode->GetAttrValue( "TargetNumber", sTargetNumber ) )
+	{
+		float fTargetNumber = LUA->RunExpressionF(sTargetNumber);
 		SetTargetNumber( fTargetNumber );
+	}
 
 	UpdateText();
 }

stepmania/src/ThemeManager.cpp

@@ -677,7 +677,7 @@ void ThemeManager::EvaluateString( CString &sText )
 {
 	/* If the string begins with an @, treat it as a raw Lua expression, and don't do any
 	 * other filtering.  (XXX: maybe we should still do font aliases) */
-	if( LUA->RunAtExpression( sText ) )
+	if( LUA->RunAtExpressionS( sText ) )
 		return;
 
 	// "::" means newline since you can't use line breaks in an ini file.