82 lines
2.0 KiB
JavaScript
82 lines
2.0 KiB
JavaScript
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/**
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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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* @flow strict-local
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* @format
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*/
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'use strict';
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import normalizeColor from '../StyleSheet/normalizeColor';
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import type {ColorValue} from '../StyleSheet/StyleSheetTypes';
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import Touchable from '../Components/Touchable/Touchable';
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import View from '../Components/View/View';
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import * as React from 'react';
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type Props = $ReadOnly<{|
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color: ColorValue,
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hitSlop: ?$ReadOnly<{|
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bottom?: ?number,
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left?: ?number,
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right?: ?number,
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top?: ?number,
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|}>,
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|}>;
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/**
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* Displays a debug overlay to visualize press targets when enabled via the
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* React Native Inspector. Calls to this module should be guarded by `__DEV__`,
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* for example:
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*
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* return (
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* <View>
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* {children}
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* {__DEV__ ? (
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* <PressabilityDebugView color="..." hitSlop={props.hitSlop} />
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* ) : null}
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* </View>
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* );
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*
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*/
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export function PressabilityDebugView({color, hitSlop}: Props): React.Node {
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if (__DEV__) {
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if (isEnabled()) {
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const normalizedColor = normalizeColor(color);
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if (typeof normalizedColor !== 'number') {
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return null;
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}
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const baseColor =
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'#' + (normalizedColor ?? 0).toString(16).padStart(8, '0');
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return (
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<View
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pointerEvents="none"
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style={{
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backgroundColor: baseColor.slice(0, -2) + '0F', // 15%
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borderColor: baseColor.slice(0, -2) + '55', // 85%
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borderStyle: 'dashed',
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borderWidth: 1,
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bottom: -(hitSlop?.bottom ?? 0),
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left: -(hitSlop?.left ?? 0),
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position: 'absolute',
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right: -(hitSlop?.right ?? 0),
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top: -(hitSlop?.top ?? 0),
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}}
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/>
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);
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}
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}
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return null;
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}
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export function isEnabled(): boolean {
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if (__DEV__) {
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return Touchable.TOUCH_TARGET_DEBUG;
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}
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return false;
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}
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