83 lines
3.1 KiB
TypeScript
83 lines
3.1 KiB
TypeScript
import { BigNumber } from '@0x/utils';
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import * as _ from 'lodash';
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import * as React from 'react';
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import { ColorOption } from '../style/theme';
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import { MaybeBigNumber } from '../types';
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import { maybeBigNumberUtil } from '../util/maybe_big_number';
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import { util } from '../util/util';
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import { ScalingInput } from './scaling_input';
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export interface ScalingAmountInputProps {
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isDisabled: boolean;
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maxFontSizePx: number;
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textLengthThreshold: number;
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fontColor?: ColorOption;
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value?: BigNumber;
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onChange: (value?: BigNumber) => void;
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onFontSizeChange: (fontSizePx: number) => void;
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}
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interface ScalingAmountInputState {
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stringValue: string;
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}
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const { stringToMaybeBigNumber, areMaybeBigNumbersEqual } = maybeBigNumberUtil;
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export class ScalingAmountInput extends React.Component<ScalingAmountInputProps, ScalingAmountInputState> {
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public static defaultProps = {
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onChange: util.boundNoop,
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onFontSizeChange: util.boundNoop,
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isDisabled: false,
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};
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public constructor(props: ScalingAmountInputProps) {
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super(props);
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this.state = {
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stringValue: _.isUndefined(props.value) ? '' : props.value.toString(),
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};
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}
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public componentDidUpdate(prevProps: ScalingAmountInputProps): void {
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const parsedStateValue = stringToMaybeBigNumber(this.state.stringValue);
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const currentValue = this.props.value;
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if (!areMaybeBigNumbersEqual(parsedStateValue, currentValue)) {
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// we somehow got into the state in which the value passed in and the string value
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// in state have differed, reset state
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// we dont expect to ever get into this state, but let's make sure
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// we reset if we do since we're dealing with important numbers
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this.setState({
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stringValue: _.isUndefined(currentValue) ? '' : currentValue.toString(),
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});
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}
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}
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public render(): React.ReactNode {
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const { textLengthThreshold, fontColor, maxFontSizePx, value, onFontSizeChange } = this.props;
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return (
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<ScalingInput
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maxFontSizePx={maxFontSizePx}
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textLengthThreshold={textLengthThreshold}
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onFontSizeChange={onFontSizeChange}
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fontColor={fontColor}
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onChange={this._handleChange}
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value={this.state.stringValue}
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placeholder="0.00"
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emptyInputWidthCh={3.5}
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isDisabled={this.props.isDisabled}
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/>
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);
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}
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private readonly _handleChange = (event: React.ChangeEvent<HTMLInputElement>): void => {
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const sanitizedValue = event.target.value.replace(/[^0-9.]/g, ''); // only allow numbers and "."
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this.setState({
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stringValue: sanitizedValue,
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});
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// Trigger onChange with a valid BigNumber, or undefined if the sanitizedValue is invalid or empty
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const bigNumberValue: MaybeBigNumber = _.isEmpty(sanitizedValue)
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? undefined
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: stringToMaybeBigNumber(sanitizedValue);
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this.props.onChange(bigNumberValue);
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};
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}
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