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* Copyright (c) Nicolas Gallagher.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
import I18nManager from '../I18nManager';
import multiplyStyleLengthValue from '../../modules/multiplyStyleLengthValue';
const emptyObject = {};
const borderTopLeftRadius = 'borderTopLeftRadius';
const borderTopRightRadius = 'borderTopRightRadius';
const borderBottomLeftRadius = 'borderBottomLeftRadius';
const borderBottomRightRadius = 'borderBottomRightRadius';
const borderLeftColor = 'borderLeftColor';
const borderLeftStyle = 'borderLeftStyle';
const borderLeftWidth = 'borderLeftWidth';
const borderRightColor = 'borderRightColor';
const borderRightStyle = 'borderRightStyle';
const borderRightWidth = 'borderRightWidth';
const right = 'right';
const marginLeft = 'marginLeft';
const marginRight = 'marginRight';
const paddingLeft = 'paddingLeft';
const paddingRight = 'paddingRight';
const left = 'left';
// Map of LTR property names to their BiDi equivalent.
const PROPERTIES_FLIP = {
borderTopLeftRadius: borderTopRightRadius,
borderTopRightRadius: borderTopLeftRadius,
borderBottomLeftRadius: borderBottomRightRadius,
borderBottomRightRadius: borderBottomLeftRadius,
borderLeftColor: borderRightColor,
borderLeftStyle: borderRightStyle,
borderLeftWidth: borderRightWidth,
borderRightColor: borderLeftColor,
borderRightStyle: borderLeftStyle,
borderRightWidth: borderLeftWidth,
left: right,
marginLeft: marginRight,
marginRight: marginLeft,
paddingLeft: paddingRight,
paddingRight: paddingLeft,
right: left
};
// Map of I18N property names to their LTR equivalent.
const PROPERTIES_I18N = {
borderTopStartRadius: borderTopLeftRadius,
borderTopEndRadius: borderTopRightRadius,
borderBottomStartRadius: borderBottomLeftRadius,
borderBottomEndRadius: borderBottomRightRadius,
borderStartColor: borderLeftColor,
borderStartStyle: borderLeftStyle,
borderStartWidth: borderLeftWidth,
borderEndColor: borderRightColor,
borderEndStyle: borderRightStyle,
borderEndWidth: borderRightWidth,
end: right,
marginStart: marginLeft,
marginEnd: marginRight,
paddingStart: paddingLeft,
paddingEnd: paddingRight,
start: left
};
const PROPERTIES_VALUE = {
clear: true,
float: true,
textAlign: true
};
// Invert the sign of a numeric-like value
const additiveInverse = (value: string | number) => multiplyStyleLengthValue(value, -1);
const i18nStyle = <T: {| [key: string]: any |}>(originalStyle: T): T => {
const { doLeftAndRightSwapInRTL, isRTL } = I18nManager.getConstants();
const style = originalStyle || emptyObject;
const frozenProps = {};
const nextStyle = {};
for (const originalProp in style) {
Iif (!Object.prototype.hasOwnProperty.call(style, originalProp)) {
continue;
}
const originalValue = style[originalProp];
let prop = originalProp;
let value = originalValue;
// BiDi flip properties
if (PROPERTIES_I18N.hasOwnProperty(originalProp)) {
// convert start/end
const convertedProp = PROPERTIES_I18N[originalProp];
prop = isRTL ? PROPERTIES_FLIP[convertedProp] : convertedProp;
} else if (isRTL && doLeftAndRightSwapInRTL && (PROPERTIES_FLIP[originalProp]: any)) {
prop = PROPERTIES_FLIP[originalProp];
}
// BiDi flip values
if (PROPERTIES_VALUE.hasOwnProperty(originalProp)) {
if (originalValue === 'start') {
value = isRTL ? 'right' : 'left';
} else if (originalValue === 'end') {
value = isRTL ? 'left' : 'right';
} else if (isRTL && doLeftAndRightSwapInRTL) {
if (originalValue === 'left') {
value = 'right';
} else Eif (originalValue === 'right') {
value = 'left';
}
}
}
// BiDi flip transitionProperty value
if (prop === 'transitionProperty') {
// BiDi flip properties
if (PROPERTIES_I18N.hasOwnProperty(value)) {
// convert start/end
const convertedValue = PROPERTIES_I18N[originalValue];
value = isRTL ? PROPERTIES_FLIP[convertedValue] : convertedValue;
} else if (isRTL && doLeftAndRightSwapInRTL) {
const flippedValue = PROPERTIES_FLIP[(originalValue: any)];
Eif (flippedValue != null) {
value = flippedValue;
}
}
}
// Create finalized style
if (isRTL && prop === 'textShadowOffset') {
const invertedValue = additiveInverse((value: any).width);
(value: any).width = invertedValue;
nextStyle[prop] = value;
} else if (!frozenProps[prop]) {
nextStyle[prop] = value;
}
if (PROPERTIES_I18N[originalProp]) {
frozenProps[prop] = true;
}
}
// $FlowIgnore
return nextStyle;
};
export default i18nStyle;
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