Update share output (#782)

* fix share bugs

* PR feedback

* PR feedback and merge fix

* Fix spacing and use explicit break

* Fix extra space

src/GraphControl/Control/Grapher.cpp

@@ -38,7 +38,7 @@ namespace
 
     constexpr auto s_X = L"x";
     constexpr auto s_Y = L"y";
-
+    constexpr auto s_defaultFormatType = FormatType::MathML;
     constexpr auto s_getGraphOpeningTags = L"<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>show2d</mi><mfenced separators=\"\">";
     constexpr auto s_getGraphClosingTags = L"</mfenced></mrow></math>";
 
@@ -65,7 +65,7 @@ namespace GraphControl
         , m_graph{ m_solver->CreateGrapher() }
         , m_Moving{ false }
     {
-        m_solver->ParsingOptions().SetFormatType(FormatType::MathML);
+        m_solver->ParsingOptions().SetFormatType(s_defaultFormatType);
         m_solver->FormatOptions().SetFormatType(FormatType::MathML);
         m_solver->FormatOptions().SetMathMLPrefix(wstring(L"mml"));
 
@@ -1009,3 +1009,15 @@ void Grapher::HandleTracingMovementTick(Object ^ sender, Object ^ e)
         ActiveTraceCursorPosition = curPos;
     }
 }
+
+String ^ Grapher::ConvertToLinear(String ^ mmlString)
+{
+    m_solver->FormatOptions().SetFormatType(FormatType::LinearInput);
+
+    auto expression = m_solver->ParseInput(mmlString->Data());
+    auto linearExpression = m_solver->Serialize(expression.get());
+
+    m_solver->FormatOptions().SetFormatType(s_defaultFormatType);
+
+    return ref new String(linearExpression.c_str());
+}

src/GraphControl/Control/Grapher.h

@@ -190,6 +190,7 @@ public
 
         event Windows::Foundation::EventHandler<Windows::Foundation::Collections::IMap<Platform::String ^, double> ^> ^ VariablesUpdated;
         void SetVariable(Platform::String ^ variableName, double newValue);
+        Platform::String ^ ConvertToLinear(Platform::String ^ mmlString);
 
     protected:
 #pragma region Control Overrides