Make all header *.hpp .

1 files changed, 157 insertions, 0 deletions

diff --git a/src/ui/ui_base.hpp b/src/ui/ui_base.hpp
new file mode 100644
index 00000000..8daa43d7
--- /dev/null
+++ b/src/ui/ui_base.hpp
@@ -0,0 +1,157 @@
+#pragma once
+
+#include <optional>
+
+
+namespace cru::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);
+    }
+
+    constexpr bool operator==(const Size& left, const Size& right)
+    {
+        return left.width == right.width && left.height == right.height;
+    }
+
+    constexpr bool operator!=(const Size& left, const Size& right)
+    {
+        return !(left == right);
+    }
+
+    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;
+    };
+
+    enum class MouseButton
+    {
+        Left,
+        Right,
+        Middle
+    };
+
+    struct TextRange
+    {
+        constexpr static std::optional<TextRange> FromTwoSides(unsigned first, unsigned second)
+        {
+            if (first > second)
+                return std::make_optional<TextRange>(second, first - second);
+            if (first < second)
+                return std::make_optional<TextRange>(first, second - first);
+            return std::nullopt;
+        }
+
+        constexpr static std::pair<unsigned, unsigned> ToTwoSides(std::optional<TextRange> text_range, unsigned default_position = 0)
+        {
+            if (text_range.has_value())
+                return std::make_pair(text_range.value().position, text_range.value().position + text_range.value().count);
+            return std::make_pair(default_position, default_position);
+        }
+
+        constexpr TextRange() = default;
+        constexpr TextRange(const unsigned position, const unsigned count)
+            : position(position), count(count)
+        {
+
+        }
+
+        unsigned position = 0;
+        unsigned count = 0;
+    };
+
+    bool IsKeyDown(int virtual_code);
+    bool IsKeyToggled(int virtual_code);
+}