Notify UserData that view state should be preserved.

This is only active when a trace is loaded from a file (and state should
be persistent for future sessions using this trace), or when state is
saved to a file (so that future sessions will use current state).

No state is preserved by default, i.e. when the trace was not saved to a
file.

server/TracyUserData.cpp

@@ -10,6 +10,7 @@ namespace tracy
 constexpr auto FileDescription = "description";
 
 UserData::UserData()
+    : m_preserveState( false )
 {
 }
 
@@ -52,6 +53,11 @@ bool UserData::SetDescription( const char* description )
     return true;
 }
 
+void UserData::StateShouldBePreserved()
+{
+    m_preserveState = true;
+}
+
 FILE* UserData::OpenFile( const char* filename, bool write )
 {
     const auto path = GetSavePath( m_program.c_str(), m_time, filename, write );

server/TracyUserData.hpp

@@ -20,6 +20,8 @@ public:
     const std::string& GetDescription() const { return m_description; }
     bool SetDescription( const char* description );
 
+    void StateShouldBePreserved();
+
 private:
     FILE* OpenFile( const char* filename, bool write );
 
@@ -27,6 +29,8 @@ private:
     uint64_t m_time;
 
     std::string m_description;
+
+    bool m_preserveState;
 };
 
 }

server/TracyView.cpp

@@ -148,6 +148,7 @@ View::View( FileRead& f, ImFont* fixedWidth, ImFont* smallFont, ImFont* bigFont,
 
     InitTextEditor();
     SetViewToLastFrames();
+    m_userData.StateShouldBePreserved();
 }
 
 View::~View()
@@ -852,6 +853,7 @@ bool View::DrawConnection()
             }
             if( f )
             {
+                m_userData.StateShouldBePreserved();
                 m_saveThreadState.store( SaveThreadState::Saving, std::memory_order_relaxed );
                 m_saveThread = std::thread( [this, f{std::move( f )}] {
                     std::shared_lock<std::shared_mutex> lock( m_worker.GetDataLock() );