react-native/Libraries/StyleSheet/flattenStyle.js

41 lines
886 B
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow strict-local
* @format
*/
'use strict';
import type {
DangerouslyImpreciseStyle,
DangerouslyImpreciseStyleProp,
} from 'StyleSheet';
function flattenStyle(
style: ?DangerouslyImpreciseStyleProp,
): ?DangerouslyImpreciseStyle {
if (style === null || typeof style !== 'object') {
return undefined;
}
if (!Array.isArray(style)) {
return style;
}
const result = {};
for (let i = 0, styleLength = style.length; i < styleLength; ++i) {
const computedStyle = flattenStyle(style[i]);
if (computedStyle) {
for (const key in computedStyle) {
result[key] = computedStyle[key];
}
}
}
return result;
}
module.exports = flattenStyle;