/* * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */ #pragma once #include <tuple> #include <react/renderer/graphics/Float.h> #include <react/renderer/graphics/Rect.h> #include <react/utils/hash_combine.h> namespace facebook::react { /* * Generic data structure describes some values associated with *edges* * of a rectangle. */ template <typename T> struct RectangleEdges { T left{}; T top{}; T right{}; T bottom{}; bool operator==(const RectangleEdges<T>& rhs) const noexcept { return std::tie(this->left, this->top, this->right, this->bottom) == std::tie(rhs.left, rhs.top, rhs.right, rhs.bottom); } bool operator!=(const RectangleEdges<T>& rhs) const noexcept { return !(*this == rhs); } bool isUniform() const noexcept { return left == top && left == right && left == bottom; } static const RectangleEdges<T> ZERO; }; template <typename T> const RectangleEdges<T> RectangleEdges<T>::ZERO = {}; template <typename T> RectangleEdges<T> operator+( const RectangleEdges<T>& lhs, const RectangleEdges<T>& rhs) noexcept { return RectangleEdges<T>{ lhs.left + rhs.left, lhs.top + rhs.top, lhs.right + rhs.right, lhs.bottom + rhs.bottom}; } template <typename T> RectangleEdges<T> operator-( const RectangleEdges<T>& lhs, const RectangleEdges<T>& rhs) noexcept { return RectangleEdges<T>{ lhs.left - rhs.left, lhs.top - rhs.top, lhs.right - rhs.right, lhs.bottom - rhs.bottom}; } /* * EdgeInsets */ using EdgeInsets = RectangleEdges<Float>; /* * Adjusts a rectangle by the given edge insets. */ inline Rect insetBy(const Rect& rect, const EdgeInsets& insets) noexcept { return Rect{ {rect.origin.x + insets.left, rect.origin.y + insets.top}, {rect.size.width - insets.left - insets.right, rect.size.height - insets.top - insets.bottom}}; } /* * Adjusts a rectangle by the given edge outsets. */ inline Rect outsetBy(const Rect& rect, const EdgeInsets& outsets) noexcept { return Rect{ {rect.origin.x - outsets.left, rect.origin.y - outsets.top}, {rect.size.width + outsets.left + outsets.right, rect.size.height + outsets.top + outsets.bottom}}; } } // namespace facebook::react namespace std { template <typename T> struct hash<facebook::react::RectangleEdges<T>> { size_t operator()( const facebook::react::RectangleEdges<T>& edges) const noexcept { return facebook::react::hash_combine( edges.left, edges.right, edges.top, edges.bottom); } }; } // namespace std