104 lines
3.3 KiB
JavaScript
104 lines
3.3 KiB
JavaScript
// @flow
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import React, { Component } from 'react';
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import PropTypes from 'prop-types';
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import { processColor, requireNativeComponent, PointPropType, StyleSheet, View, ViewPropTypes } from 'react-native';
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const deprecatedPropType = require('react-native/Libraries/Utilities/deprecatedPropType.js');
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const convertPoint = (name, point) => {
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if (Array.isArray(point)) {
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console.warn(
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`LinearGradient '${name}' property shoule be an object with fields 'x' and 'y', ` +
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'Array type is deprecated.'
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);
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}
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if (point !== null && typeof point === 'object') {
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return [point.x, point.y];
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}
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return point;
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};
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type PropsType = {
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start?: Array<number> | {x: number, y: number};
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end?: Array<number> | {x: number, y: number};
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colors: Array<string>;
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locations?: Array<number>;
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} & typeof(View);
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export default class LinearGradient extends Component {
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static propTypes = {
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start: PropTypes.oneOfType([
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PointPropType,
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deprecatedPropType(
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PropTypes.arrayOf(PropTypes.number),
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'Use point object with {x, y} instead.'
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)
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]),
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end: PropTypes.oneOfType([
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PointPropType,
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deprecatedPropType(
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PropTypes.arrayOf(PropTypes.number),
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'Use point object with {x, y} instead.'
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)
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]),
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colors: PropTypes.arrayOf(PropTypes.string).isRequired,
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locations: PropTypes.arrayOf(PropTypes.number),
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...ViewPropTypes,
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};
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props: PropsType;
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gradientRef: any;
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setNativeProps(props: PropsType) {
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this.gradientRef.setNativeProps(props);
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}
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render() {
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const {
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children,
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colors,
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end,
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locations,
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start,
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style,
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...otherProps
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} = this.props;
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if ((colors && locations) && (colors.length !== locations.length)) {
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console.warn('LinearGradient colors and locations props should be arrays of the same length');
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}
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// inherit container borderRadius until this issue is resolved:
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// https://github.com/facebook/react-native/issues/3198
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const flatStyle = StyleSheet.flatten(style) || {};
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const borderRadius = flatStyle.borderRadius || 0;
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// this is the format taken by:
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// http://developer.android.com/reference/android/graphics/Path.html#addRoundRect(android.graphics.RectF, float[], android.graphics.Path.Direction)
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const borderRadiiPerCorner = [
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flatStyle.borderTopLeftRadius || borderRadius,
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flatStyle.borderTopLeftRadius || borderRadius,
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flatStyle.borderTopRightRadius || borderRadius,
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flatStyle.borderTopRightRadius || borderRadius,
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flatStyle.borderBottomRightRadius || borderRadius,
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flatStyle.borderBottomRightRadius || borderRadius,
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flatStyle.borderBottomLeftRadius || borderRadius,
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flatStyle.borderBottomLeftRadius || borderRadius
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];
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return (
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<View ref={(component) => { this.gradientRef = component; }} {...otherProps} style={style}>
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<NativeLinearGradient
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style={{position: 'absolute', top: 0, left: 0, bottom: 0, right: 0}}
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colors={colors.map(processColor)}
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start={convertPoint('start', start)}
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end={convertPoint('end', end)}
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locations={locations ? locations.slice(0, colors.length) : null}
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borderRadii={borderRadiiPerCorner}
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/>
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{ children }
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</View>
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);
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}
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}
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const NativeLinearGradient = requireNativeComponent('BVLinearGradient', null);
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