117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
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/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <algorithm>
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#include <tuple>
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#include <folly/Hash.h>
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#include <react/renderer/graphics/Float.h>
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#include <react/renderer/graphics/Point.h>
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#include <react/renderer/graphics/Size.h>
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namespace facebook {
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namespace react {
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/*
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* Contains the location and dimensions of a rectangle.
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*/
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struct Rect {
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Point origin{0, 0};
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Size size{0, 0};
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bool operator==(Rect const &rhs) const noexcept {
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return std::tie(this->origin, this->size) == std::tie(rhs.origin, rhs.size);
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}
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bool operator!=(Rect const &rhs) const noexcept {
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return !(*this == rhs);
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}
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Float getMaxX() const noexcept {
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return size.width > 0 ? origin.x + size.width : origin.x;
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}
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Float getMaxY() const noexcept {
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return size.height > 0 ? origin.y + size.height : origin.y;
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}
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Float getMinX() const noexcept {
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return size.width >= 0 ? origin.x : origin.x + size.width;
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}
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Float getMinY() const noexcept {
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return size.height >= 0 ? origin.y : origin.y + size.height;
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}
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Float getMidX() const noexcept {
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return origin.x + size.width / 2;
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}
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Float getMidY() const noexcept {
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return origin.y + size.height / 2;
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}
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Point getCenter() const noexcept {
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return {getMidX(), getMidY()};
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}
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void unionInPlace(Rect const &rect) noexcept {
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auto x1 = std::min(getMinX(), rect.getMinX());
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auto y1 = std::min(getMinY(), rect.getMinY());
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auto x2 = std::max(getMaxX(), rect.getMaxX());
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auto y2 = std::max(getMaxY(), rect.getMaxY());
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origin = {x1, y1};
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size = {x2 - x1, y2 - y1};
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}
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bool containsPoint(Point point) noexcept {
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return point.x >= origin.x && point.y >= origin.y &&
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point.x <= (origin.x + size.width) &&
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point.y <= (origin.y + size.height);
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}
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static Rect boundingRect(
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Point const &a,
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Point const &b,
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Point const &c,
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Point const &d) noexcept {
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auto leftTopPoint = a;
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auto rightBottomPoint = a;
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leftTopPoint.x = std::min(leftTopPoint.x, b.x);
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leftTopPoint.x = std::min(leftTopPoint.x, c.x);
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leftTopPoint.x = std::min(leftTopPoint.x, d.x);
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leftTopPoint.y = std::min(leftTopPoint.y, b.y);
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leftTopPoint.y = std::min(leftTopPoint.y, c.y);
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leftTopPoint.y = std::min(leftTopPoint.y, d.y);
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rightBottomPoint.x = std::max(rightBottomPoint.x, b.x);
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rightBottomPoint.x = std::max(rightBottomPoint.x, c.x);
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rightBottomPoint.x = std::max(rightBottomPoint.x, d.x);
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rightBottomPoint.y = std::max(rightBottomPoint.y, b.y);
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rightBottomPoint.y = std::max(rightBottomPoint.y, c.y);
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rightBottomPoint.y = std::max(rightBottomPoint.y, d.y);
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return {
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leftTopPoint,
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{rightBottomPoint.x - leftTopPoint.x,
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rightBottomPoint.y - leftTopPoint.y}};
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}
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};
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} // namespace react
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} // namespace facebook
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namespace std {
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template <>
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struct hash<facebook::react::Rect> {
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size_t operator()(facebook::react::Rect const &rect) const noexcept {
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return folly::hash::hash_combine(0, rect.origin, rect.size);
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}
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};
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} // namespace std
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