From 2b3e9b778af397c4807c8c69c9cb745bae285a0f Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Fri, 4 Aug 2023 13:08:02 +0200
Subject: [PATCH] libui: Add Rect::relative

---
 libui/include/ui/Rect.h | 8 ++++++++
 libui/src/Rect.cpp      | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/libui/include/ui/Rect.h b/libui/include/ui/Rect.h
index 774013ad..6503a6ed 100644
--- a/libui/include/ui/Rect.h
+++ b/libui/include/ui/Rect.h
@@ -29,6 +29,14 @@ namespace ui
          */
         Point normalize(Point point);
 
+        /**
+         * @brief Transform an absolute position to a position relative to this rectangle.
+         *
+         * @param pos The original absolute position.
+         * @return Point The position relative to this rectangle.
+         */
+        Point relative(Point pos);
+
         /**
          * @brief Return a copy of this rectangle with no negative values (normalized to 0).
          *
diff --git a/libui/src/Rect.cpp b/libui/src/Rect.cpp
index 444157a0..448655ad 100644
--- a/libui/src/Rect.cpp
+++ b/libui/src/Rect.cpp
@@ -17,6 +17,14 @@ namespace ui
         return point;
     }
 
+    Point Rect::relative(Point point)
+    {
+        point = normalize(point);
+        point.x -= pos.x;
+        point.y -= pos.y;
+        return point;
+    }
+
     Rect Rect::absolute()
     {
         return Rect { ui::Point { pos.x < 0 ? 0 : pos.x, pos.y < 0 ? 0 : pos.y }, width, height };