1 files changed, 55 insertions, 0 deletions
diff --git a/gfx/src/nsRectAbsolute.h b/gfx/src/nsRectAbsolute.h
new file mode 100644
index 0000000000..6d9f718893
--- /dev/null
+++ b/gfx/src/nsRectAbsolute.h
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef NSRECTABSOLUTE_H
+#define NSRECTABSOLUTE_H
+
+#include "mozilla/gfx/RectAbsolute.h"
+#include "nsCoord.h"
+#include "nsMargin.h"
+#include "nsRect.h"
+
+struct nsRectAbsolute
+    : public mozilla::gfx::BaseRectAbsolute<nscoord, nsRectAbsolute, nsPoint,
+                                            nsRect> {
+  typedef mozilla::gfx::BaseRectAbsolute<nscoord, nsRectAbsolute, nsPoint,
+                                         nsRect>
+      Super;
+
+  nsRectAbsolute() {}
+  nsRectAbsolute(nscoord aX1, nscoord aY1, nscoord aX2, nscoord aY2)
+      : Super(aX1, aY1, aX2, aY2) {}
+
+  MOZ_ALWAYS_INLINE nscoord SafeWidth() const {
+    int64_t width = right;
+    width -= left;
+    return nscoord(
+        std::min<int64_t>(std::numeric_limits<nscoord>::max(), width));
+  }
+  MOZ_ALWAYS_INLINE nscoord SafeHeight() const {
+    int64_t height = bottom;
+    height -= top;
+    return nscoord(
+        std::min<int64_t>(std::numeric_limits<nscoord>::max(), height));
+  }
+
+  nsRect ToNSRect() const {
+    return nsRect(left, top, nscoord(SafeWidth()), nscoord(SafeHeight()));
+  }
+
+  [[nodiscard]] nsRectAbsolute UnsafeUnion(const nsRectAbsolute& aRect) const {
+    return Super::Union(aRect);
+  }
+
+  void Inflate(const nsMargin& aMargin) {
+    left -= aMargin.left;
+    top -= aMargin.top;
+    right += aMargin.right;
+    bottom += aMargin.bottom;
+  }
+};
+
+#endif /* NSRECTABSOLUTE_H */