mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Joshua Gross
3824c565bf
Summary: Turns out that ShadowViews that have different LayoutMetrics will have the same hash. Fix that. This helps for debugging LayoutAnimations. Changelog: [Internal] Reviewed By: sammy-SC Differential Revision: D27585133 fbshipit-source-id: f0ac50619115150339089276e34fee5ddd0270bc
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its 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 <folly/Hash.h>
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#include <react/renderer/core/LayoutPrimitives.h>
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#include <react/renderer/graphics/Geometry.h>
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namespace facebook {
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namespace react {
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/*
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* Describes results of layout process for particular shadow node.
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*/
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struct LayoutMetrics {
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Rect frame;
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EdgeInsets contentInsets{0};
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EdgeInsets borderWidth{0};
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DisplayType displayType{DisplayType::Flex};
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LayoutDirection layoutDirection{LayoutDirection::Undefined};
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Float pointScaleFactor{1.0};
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EdgeInsets overflowInset{};
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Rect getContentFrame() const {
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return Rect{
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Point{contentInsets.left, contentInsets.top},
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Size{
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frame.size.width - contentInsets.left - contentInsets.right,
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frame.size.height - contentInsets.top - contentInsets.bottom}};
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}
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bool operator==(const LayoutMetrics &rhs) const {
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return std::tie(
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this->frame,
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this->contentInsets,
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this->borderWidth,
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this->displayType,
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this->layoutDirection,
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this->pointScaleFactor) ==
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std::tie(
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rhs.frame,
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rhs.contentInsets,
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rhs.borderWidth,
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rhs.displayType,
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rhs.layoutDirection,
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rhs.pointScaleFactor);
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}
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bool operator!=(const LayoutMetrics &rhs) const {
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return !(*this == rhs);
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}
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};
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/*
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* Represents some undefined, not-yet-computed or meaningless value of
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* `LayoutMetrics` type.
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* The value is comparable by equality with any other `LayoutMetrics` value.
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*/
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static LayoutMetrics const EmptyLayoutMetrics = {
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/* .frame = */ {{0, 0}, {-1.0, -1.0}}};
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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::LayoutMetrics> {
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size_t operator()(const facebook::react::LayoutMetrics &layoutMetrics) const {
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return folly::hash::hash_combine(
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0,
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layoutMetrics.frame,
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layoutMetrics.contentInsets,
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layoutMetrics.borderWidth,
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layoutMetrics.displayType,
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layoutMetrics.layoutDirection,
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layoutMetrics.pointScaleFactor,
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layoutMetrics.overflowInset);
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}
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};
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} // namespace std
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