Add conditional expression/statement support for shaders

src/ShaderNode/DataModels/ConditionalExpression.hpp

@@ -0,0 +1,58 @@
+#pragma once
+
+#ifndef NAZARA_SHADERNODES_CONDITIONALEXPRESSION_HPP
+#define NAZARA_SHADERNODES_CONDITIONALEXPRESSION_HPP
+
+#include <ShaderNode/ShaderGraph.hpp>
+#include <ShaderNode/DataModels/ShaderNode.hpp>
+#include <optional>
+#include <string>
+#include <vector>
+
+class ConditionalExpression : public ShaderNode
+{
+	public:
+		ConditionalExpression(ShaderGraph& graph);
+		~ConditionalExpression() = default;
+
+		void BuildNodeEdition(QFormLayout* layout) override;
+
+		Nz::ShaderNodes::ExpressionPtr GetExpression(Nz::ShaderNodes::ExpressionPtr* /*expressions*/, std::size_t count) const override;
+
+		QString caption() const override;
+		QString name() const override;
+
+		unsigned int nPorts(QtNodes::PortType portType) const override;
+
+		QtNodes::NodeDataType dataType(QtNodes::PortType portType, QtNodes::PortIndex portIndex) const override;
+
+		QString portCaption(QtNodes::PortType portType, QtNodes::PortIndex portIndex) const override;
+		bool portCaptionVisible(QtNodes::PortType portType, QtNodes::PortIndex portIndex) const override;
+
+		std::shared_ptr<QtNodes::NodeData> outData(QtNodes::PortIndex port) override;
+
+		void restore(const QJsonObject& data) override;
+		QJsonObject save() const override;
+
+		void setInData(std::shared_ptr<QtNodes::NodeData> value, int index) override;
+
+		QtNodes::NodeValidationState validationState() const override;
+		QString validationMessage() const override;
+
+	private:
+		bool ComputePreview(QPixmap& pixmap) override;
+		void OnConditionListUpdate();
+		void UpdateConditionText();
+
+		NazaraSlot(ShaderGraph, OnConditionListUpdate, m_onConditionListUpdateSlot);
+		NazaraSlot(ShaderGraph, OnConditionUpdate, m_onConditionUpdateSlot);
+
+		std::optional<std::size_t> m_currentConditionIndex;
+		std::shared_ptr<QtNodes::NodeData> m_falsePath;
+		std::shared_ptr<QtNodes::NodeData> m_truePath;
+		std::string m_currentConditionText;
+};
+
+#include <ShaderNode/DataModels/BufferField.inl>
+
+#endif