1 files changed, 154 insertions, 0 deletions
diff --git a/src/ui/ui_base.h b/src/ui/ui_base.h
new file mode 100644
index 00000000..43f3c498
--- /dev/null
+++ b/src/ui/ui_base.h
@@ -0,0 +1,154 @@
+#pragma once
+
+
+namespace cru
+{
+    namespace ui
+    {
+        struct Point
+        {
+            constexpr static Point Zero()
+            {
+                return Point(0, 0);
+            }
+
+            constexpr Point() = default;
+            constexpr Point(const float x, const float y) : x(x), y(y) { }
+
+            float x = 0;
+            float y = 0;
+        };
+
+        constexpr bool operator==(const Point& left, const Point& right)
+        {
+            return left.x == right.x && left.y == right.y;
+        }
+
+        constexpr bool operator!=(const Point& left, const Point& right)
+        {
+            return !(left == right);
+        }
+
+        struct Size
+        {
+            constexpr static Size Zero()
+            {
+                return Size(0, 0);
+            }
+
+            constexpr Size() = default;
+            constexpr Size(const float width, const float height) : width(width), height(height) { }
+
+            float width = 0;
+            float height = 0;
+        };
+
+        constexpr Size operator + (const Size& left, const Size& right)
+        {
+            return Size(left.width + right.width, left.height + right.height);
+        }
+
+        constexpr Size operator - (const Size& left, const Size& right)
+        {
+            return Size(left.width - right.width, left.height - right.height);
+        }
+
+        struct Rect
+        {
+            constexpr Rect() = default;
+            constexpr Rect(const float left, const float top, const float width, const float height)
+                : left(left), top(top), width(width), height(height) { }
+            constexpr Rect(const Point& lefttop, const Size& size)
+                : left(lefttop.x), top(lefttop.y), width(size.width), height(size.height) { }
+
+            constexpr static Rect FromVertices(const float left, const float top, const float right, const float bottom)
+            {
+                return Rect(left, top, right - left, bottom - top);
+            }
+
+            constexpr float GetRight() const
+            {
+                return left + width;
+            }
+
+            constexpr float GetBottom() const
+            {
+                return top + height;
+            }
+
+            constexpr Point GetLeftTop() const
+            {
+                return Point(left, top);
+            }
+
+            constexpr Point GetRightBottom() const
+            {
+                return Point(left + width, top + height);
+            }
+
+            constexpr Size GetSize() const
+            {
+                return Size(width, height);
+            }
+
+            constexpr bool IsPointInside(const Point& point) const
+            {
+                return
+                    point.x >= left &&
+                    point.x < GetRight() &&
+                    point.y >= top &&
+                    point.y < GetBottom();
+            }
+
+            float left = 0.0f;
+            float top = 0.0f;
+            float width = 0.0f;
+            float height = 0.0f;
+        };
+
+        struct Thickness
+        {
+            constexpr static Thickness Zero()
+            {
+                return Thickness(0);
+            }
+
+            constexpr Thickness() : Thickness(0) { }
+
+            constexpr explicit Thickness(const float width)
+                : left(width), top(width), right(width), bottom(width) { }
+
+            constexpr explicit Thickness(const float horizontal, const float vertical)
+                : left(horizontal), top(vertical), right(horizontal), bottom(vertical) { }
+
+            constexpr Thickness(const float left, const float top, const float right, const float bottom)
+                : left(left), top(top), right(right), bottom(bottom) { }
+
+
+            float left;
+            float top;
+            float right;
+            float bottom;
+        };
+
+        enum class MouseButton
+        {
+            Left,
+            Right,
+            Middle
+        };
+
+        struct TextRange
+        {
+            constexpr TextRange() = default;
+            constexpr TextRange(const int position, const int count)
+                : position(position), count(count)
+            {
+
+            }
+
+            unsigned position = 0;
+            unsigned count = 0;
+        };
+    }
+}