Enable checking if temp var is in use

lib/macro/macro-action-variable.cpp

@@ -17,6 +17,14 @@ namespace advss {
 
 const std::string MacroActionVariable::id = "variable";
 
+std::vector<TempVariableRef> MacroActionVariable::GetTempVarRefs() const
+{
+	if (!_tempVar.HasValidID()) {
+		return {};
+	}
+	return {_tempVar};
+}
+
 bool MacroActionVariable::_registered = MacroActionFactory::Register(
 	MacroActionVariable::id,
 	{MacroActionVariable::Create, MacroActionVariableEdit::Create,
@@ -1450,6 +1458,7 @@ void MacroActionVariableEdit::SelectionChanged(const TempVariableRef &var)
 {
 	GUARD_LOADING_AND_LOCK();
 	_entryData->_tempVar = var;
+	IncrementTempVarInUseGeneration();
 	SetWidgetVisibility();
 }
 

lib/macro/macro-action-variable.hpp

@@ -23,6 +23,7 @@ public:
 	bool PostLoad();
 	std::string GetShortDesc() const;
 	std::string GetId() const { return id; };
+	std::vector<TempVariableRef> GetTempVarRefs() const;
 	static std::shared_ptr<MacroAction> Create(Macro *m);
 	std::shared_ptr<MacroAction> Copy() const;
 	void SetSegmentIndexValue(int);

lib/macro/macro-condition-tempvar.cpp

@@ -6,6 +6,14 @@ namespace advss {
 
 const std::string MacroConditionTempVar::id = "temp_var";
 
+std::vector<TempVariableRef> MacroConditionTempVar::GetTempVarRefs() const
+{
+	if (!_tempVar.HasValidID()) {
+		return {};
+	}
+	return {_tempVar};
+}
+
 bool MacroConditionTempVar::_registered = MacroConditionFactory::Register(
 	MacroConditionTempVar::id,
 	{MacroConditionTempVar::Create, MacroConditionTempVarEdit::Create,
@@ -266,6 +274,7 @@ void MacroConditionTempVarEdit::VariableChanged(const TempVariableRef &var)
 {
 	GUARD_LOADING_AND_LOCK();
 	_entryData->_tempVar = var;
+	IncrementTempVarInUseGeneration();
 }
 
 void MacroConditionTempVarEdit::Variable2Changed(const QString &text)

lib/macro/macro-condition-tempvar.hpp

@@ -20,6 +20,7 @@ public:
 	bool Load(obs_data_t *obj);
 	std::string GetShortDesc() const;
 	std::string GetId() const { return id; };
+	std::vector<TempVariableRef> GetTempVarRefs() const;
 	static std::shared_ptr<MacroCondition> Create(Macro *m)
 	{
 		return std::make_shared<MacroConditionTempVar>(m);

lib/macro/macro-segment.cpp

@@ -13,6 +13,11 @@
 
 namespace advss {
 
+std::vector<TempVariableRef> MacroSegment::GetTempVarRefs() const
+{
+	return {};
+}
+
 MacroSegment::MacroSegment(Macro *m, bool supportsVariableValue)
 	: _macro(m),
 	  _supportsVariableValue(supportsVariableValue)
@@ -152,6 +157,16 @@ void MacroSegment::AddTempvar(const std::string &id, const std::string &name,
 	NotifyUIAboutTempVarChange(this);
 }
 
+bool MacroSegment::IsTempVarInUse(const std::string &id) const
+{
+	for (const auto &var : _tempVariables) {
+		if (var.ID() == id) {
+			return var.IsInUse();
+		}
+	}
+	return false;
+}
+
 void MacroSegment::SetTempVarValue(const std::string &id,
 				   const std::string &value)
 {

lib/macro/macro-segment.hpp

@@ -34,6 +34,7 @@ public:
 	std::string GetCustomLabel() const { return _customLabel; }
 	virtual bool Save(obs_data_t *obj) const = 0;
 	virtual bool Load(obs_data_t *obj) = 0;
+	virtual std::vector<TempVariableRef> GetTempVarRefs() const;
 	virtual bool PostLoad();
 	virtual std::string GetShortDesc() const;
 	virtual std::string GetId() const = 0;
@@ -54,6 +55,7 @@ protected:
 	void AddTempvar(const std::string &id, const std::string &name,
 			const std::string &description = "");
 
+	bool IsTempVarInUse(const std::string &id) const;
 	void SetTempVarValue(const std::string &id, const std::string &value);
 
 	template<typename T, typename = std::enable_if_t<
@@ -64,6 +66,14 @@ protected:
 					  : std::string("false"));
 	}
 
+	template<typename F, typename = std::enable_if_t<std::is_invocable_v<F>>>
+	void SetTempVarValue(const std::string &id, F &&valueProvider)
+	{
+		if (IsTempVarInUse(id)) {
+			SetTempVarValue(id, valueProvider());
+		}
+	}
+
 private:
 	void ClearAvailableTempvars();
 	std::optional<const TempVariable>