react-native/Libraries/StyleSheet/flattenStyle.js

38 lines
732 B
JavaScript

/**
* Copyright 2004-present Facebook. All Rights Reserved.
*
* @providesModule flattenStyle
*/
'use strict';
var StyleSheetRegistry = require('StyleSheetRegistry');
var mergeIntoFast = require('mergeIntoFast');
function getStyle(style) {
if (typeof style === 'number') {
return StyleSheetRegistry.getStyleByID(style);
}
return style;
}
function flattenStyle(style) {
if (!style) {
return undefined;
}
if (!Array.isArray(style)) {
return getStyle(style);
}
var result = {};
for (var i = 0; i < style.length; ++i) {
var computedStyle = flattenStyle(style[i]);
if (computedStyle) {
mergeIntoFast(result, computedStyle);
}
}
return result;
}
module.exports = flattenStyle;