From 3f5d8e1d48353dce13953160b4f770b98b32052c Mon Sep 17 00:00:00 2001
From: Loukas Agorgianitis <loukas@agorgianitis.com>
Date: Mon, 14 Apr 2025 11:42:06 +0200
Subject: [PATCH] util/box: introduce wlr_fbox_contains_box

Signed-off-by: Loukas Agorgianitis <loukas@agorgianitis.com>
---
 include/wlr/util/box.h |  8 ++++++++
 util/box.c             | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/wlr/util/box.h b/include/wlr/util/box.h
index 816bece7e..287653904 100644
--- a/include/wlr/util/box.h
+++ b/include/wlr/util/box.h
@@ -87,6 +87,14 @@ bool wlr_box_contains_point(const struct wlr_box *box, double x, double y);
  */
 bool wlr_box_contains_box(const struct wlr_box *bigger, const struct wlr_box *smaller);
 
+/**
+ * Verifies that a box is fully contained within another box.
+ *
+ * Returns true if the "smaller" box is fully contained within the "bigger" box.
+ * If either of the boxes are empty, false is returned.
+ */
+bool wlr_fbox_contains_box(const struct wlr_fbox *bigger, const struct wlr_fbox *smaller);
+
 /**
  * Checks whether a box is empty or not.
  *
diff --git a/util/box.c b/util/box.c
index 087a33d19..2ceb6e2c3 100644
--- a/util/box.c
+++ b/util/box.c
@@ -122,6 +122,17 @@ bool wlr_box_contains_box(const struct wlr_box *bigger, const struct wlr_box *sm
 		smaller->y + smaller->height <= bigger->y + bigger->height;
 }
 
+bool wlr_fbox_contains_box(const struct wlr_fbox *bigger, const struct wlr_fbox *smaller) {
+	if (wlr_fbox_empty(bigger) || wlr_fbox_empty(smaller)) {
+		return false;
+	}
+
+	return smaller->x >= bigger->x &&
+		smaller->x + smaller->width <= bigger->x + bigger->width &&
+		smaller->y >= bigger->y &&
+		smaller->y + smaller->height <= bigger->y + bigger->height;
+}
+
 void wlr_box_transform(struct wlr_box *dest, const struct wlr_box *box,
 		enum wl_output_transform transform, int width, int height) {
 	struct wlr_box src = {0};