45 lines
1.0 KiB
JavaScript
45 lines
1.0 KiB
JavaScript
/**
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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 StyleSheetRegistry
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* @flow
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*/
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'use strict';
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var styles = {};
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var uniqueID = 1;
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var emptyStyle = {};
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class StyleSheetRegistry {
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static registerStyle(style: Object): number {
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var id = ++uniqueID;
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if (__DEV__) {
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Object.freeze(style);
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}
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styles[id] = style;
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return id;
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}
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static getStyleByID(id: number): Object {
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if (!id) {
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// Used in the style={[condition && id]} pattern,
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// we want it to be a no-op when the value is false or null
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return emptyStyle;
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}
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var style = styles[id];
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if (!style) {
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console.warn('Invalid style with id `' + id + '`. Skipping ...');
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return emptyStyle;
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}
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return style;
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}
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}
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module.exports = StyleSheetRegistry;
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