52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule flattenStyle
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* @flow
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*/
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'use strict';
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var invariant = require('fbjs/lib/invariant');
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var ReactNativePropRegistry;
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import type { StyleObj } from 'StyleSheetTypes';
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function getStyle(style) {
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if (ReactNativePropRegistry === undefined) {
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ReactNativePropRegistry = require('ReactNativePropRegistry');
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}
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if (typeof style === 'number') {
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return ReactNativePropRegistry.getByID(style);
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}
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return style;
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}
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function flattenStyle(style: ?StyleObj): ?Object {
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if (!style) {
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return undefined;
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}
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invariant(style !== true, 'style may be false but not true');
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if (!Array.isArray(style)) {
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return getStyle(style);
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}
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var result = {};
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for (var i = 0, styleLength = style.length; i < styleLength; ++i) {
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var computedStyle = flattenStyle(style[i]);
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if (computedStyle) {
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for (var key in computedStyle) {
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result[key] = computedStyle[key];
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}
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}
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}
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return result;
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}
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module.exports = flattenStyle;
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