1 files changed, 96 insertions, 0 deletions
diff --git a/CruUI/ui/layout_base.h b/CruUI/ui/layout_base.h
new file mode 100644
index 00000000..9bbbc9fd
--- /dev/null
+++ b/CruUI/ui/layout_base.h
@@ -0,0 +1,96 @@
+#pragma once
+
+#include <optional>
+
+namespace cru
+{
+    namespace ui
+    {
+        enum class MeasureMode
+        {
+            Exactly,
+            Content,
+            Stretch
+        };
+
+        struct MeasureLength final
+        {
+            explicit MeasureLength(const float length = 0.0, const MeasureMode mode = MeasureMode::Exactly)
+                : length(length), mode(mode)
+            {
+
+            }
+
+            bool Validate() const
+            {
+                return !(mode == MeasureMode::Exactly && length < 0.0);
+            }
+
+            float length;
+            MeasureMode mode;
+        };
+
+        struct MeasureSize final
+        {
+            MeasureLength width;
+            MeasureLength height;
+
+            bool Validate() const
+            {
+                return width.Validate() && height.Validate();
+            }
+        };
+
+        struct OptionalSize final
+        {
+            OptionalSize()
+                : width(std::nullopt), height(std::nullopt)
+            {
+
+            }
+
+            OptionalSize(const std::optional<float> width, const std::optional<float> height)
+                : width(width), height(height)
+            {
+
+            }
+
+            OptionalSize(const OptionalSize& other) = default;
+            OptionalSize(OptionalSize&& other) = default;
+            OptionalSize& operator = (const OptionalSize& other) = default;
+            OptionalSize& operator = (OptionalSize&& other) = default;
+            ~OptionalSize() = default;
+
+            bool Validate() const
+            {
+                if (width.has_value() && width.value() < 0.0)
+                    return false;
+                if (height.has_value() && height.value() < 0.0)
+                    return false;
+                return true;
+            }
+
+            std::optional<float> width;
+            std::optional<float> height;
+        };
+
+        struct BasicLayoutParams
+        {
+            BasicLayoutParams() = default;
+            BasicLayoutParams(const BasicLayoutParams&) = default;
+            BasicLayoutParams(BasicLayoutParams&&) = default;
+            BasicLayoutParams& operator = (const BasicLayoutParams&) = default;
+            BasicLayoutParams& operator = (BasicLayoutParams&&) = default;
+            virtual ~BasicLayoutParams() = default;
+
+            bool Validate() const
+            {
+                return size.Validate() && max_size.Validate() && min_size.Validate();
+            }
+
+            MeasureSize size;
+            OptionalSize min_size;
+            OptionalSize max_size;
+        };
+    }
+}
+\ No newline at end of file