LibDraw: Add FloatPoint, FloatSize and FloatRect

These are floating point varians of Point, Size and Rect.

Libraries/LibDraw/FloatPoint.h

@@ -0,0 +1,117 @@
+#pragma once
+
+#include <AK/String.h>
+#include <AK/LogStream.h>
+#include <LibDraw/Orientation.h>
+
+class FloatRect;
+
+class FloatPoint {
+public:
+    FloatPoint() {}
+    FloatPoint(float x, float y)
+        : m_x(x)
+        , m_y(y)
+    {
+    }
+    float x() const { return m_x; }
+    float y() const { return m_y; }
+
+    void set_x(float x) { m_x = x; }
+    void set_y(float y) { m_y = y; }
+
+    void move_by(float dx, float dy)
+    {
+        m_x += dx;
+        m_y += dy;
+    }
+
+    void move_by(const FloatPoint& delta)
+    {
+        move_by(delta.x(), delta.y());
+    }
+
+    FloatPoint translated(const FloatPoint& delta) const
+    {
+        FloatPoint point = *this;
+        point.move_by(delta);
+        return point;
+    }
+
+    FloatPoint translated(float dx, float dy) const
+    {
+        FloatPoint point = *this;
+        point.move_by(dx, dy);
+        return point;
+    }
+
+    void constrain(const FloatRect&);
+
+    bool operator==(const FloatPoint& other) const
+    {
+        return m_x == other.m_x
+            && m_y == other.m_y;
+    }
+
+    bool operator!=(const FloatPoint& other) const
+    {
+        return !(*this == other);
+    }
+
+    FloatPoint operator-() const { return { -m_x, -m_y }; }
+
+    FloatPoint operator-(const FloatPoint& other) const { return { m_x - other.m_x, m_y - other.m_y }; }
+    FloatPoint& operator-=(const FloatPoint& other)
+    {
+        m_x -= other.m_x;
+        m_y -= other.m_y;
+        return *this;
+    }
+
+    FloatPoint& operator+=(const FloatPoint& other)
+    {
+        m_x += other.m_x;
+        m_y += other.m_y;
+        return *this;
+    }
+    FloatPoint operator+(const FloatPoint& other) const { return { m_x + other.m_x, m_y + other.m_y }; }
+
+    String to_string() const { return String::format("[%g,%g]", x(), y()); }
+
+    bool is_null() const { return !m_x && !m_y; }
+
+    float primary_offset_for_orientation(Orientation orientation) const
+    {
+        return orientation == Orientation::Vertical ? y() : x();
+    }
+
+    void set_primary_offset_for_orientation(Orientation orientation, float value)
+    {
+        if (orientation == Orientation::Vertical)
+            set_y(value);
+        else
+            set_x(value);
+    }
+
+    float secondary_offset_for_orientation(Orientation orientation) const
+    {
+        return orientation == Orientation::Vertical ? x() : y();
+    }
+
+    void set_secondary_offset_for_orientation(Orientation orientation, float value)
+    {
+        if (orientation == Orientation::Vertical)
+            set_x(value);
+        else
+            set_y(value);
+    }
+
+private:
+    float m_x { 0 };
+    float m_y { 0 };
+};
+
+inline const LogStream& operator<<(const LogStream& stream, const FloatPoint& value)
+{
+    return stream << value.to_string();
+}