1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
import { BigNumber } from '@0x/utils';
import * as _ from 'lodash';
import * as React from 'react';
import { ColorOption } from '../style/theme';
import { MaybeBigNumber } from '../types';
import { util } from '../util/util';
import { ScalingInput } from './scaling_input';
export interface ScalingAmountInputProps {
isDisabled: boolean;
maxFontSizePx: number;
textLengthThreshold: number;
fontColor?: ColorOption;
value?: BigNumber;
onChange: (value?: BigNumber) => void;
onFontSizeChange: (fontSizePx: number) => void;
}
interface ScalingAmountInputState {
stringValue: string;
}
const stringToMaybeBigNumber = (stringValue: string): MaybeBigNumber => {
let maybeBigNumber: MaybeBigNumber;
try {
maybeBigNumber = new BigNumber(stringValue);
} catch {
maybeBigNumber = undefined;
}
return _.isNaN(maybeBigNumber) ? undefined : maybeBigNumber;
};
const areMaybeBigNumbersEqual = (val1: MaybeBigNumber, val2: MaybeBigNumber): boolean => {
if (!_.isUndefined(val1) && !_.isUndefined(val2)) {
return val1.equals(val2);
}
return _.isUndefined(val1) && _.isUndefined(val2);
};
export class ScalingAmountInput extends React.Component<ScalingAmountInputProps, ScalingAmountInputState> {
public static defaultProps = {
onChange: util.boundNoop,
onFontSizeChange: util.boundNoop,
isDisabled: false,
};
public constructor(props: ScalingAmountInputProps) {
super(props);
this.state = {
stringValue: _.isUndefined(props.value) ? '' : props.value.toString(),
};
}
public componentDidUpdate(prevProps: ScalingAmountInputProps): void {
const parsedStateValue = stringToMaybeBigNumber(this.state.stringValue);
const currentValue = this.props.value;
if (!areMaybeBigNumbersEqual(parsedStateValue, currentValue)) {
// we somehow got into the state in which the value passed in and the string value
// in state have differed, reset state
this.setState({
stringValue: _.isUndefined(currentValue) ? '' : currentValue.toString(),
});
}
}
public render(): React.ReactNode {
const { textLengthThreshold, fontColor, maxFontSizePx, value, onFontSizeChange } = this.props;
return (
<ScalingInput
maxFontSizePx={maxFontSizePx}
textLengthThreshold={textLengthThreshold}
onFontSizeChange={onFontSizeChange}
fontColor={fontColor}
onChange={this._handleChange}
value={this.state.stringValue}
placeholder="0.00"
emptyInputWidthCh={3.5}
isDisabled={this.props.isDisabled}
/>
);
}
private readonly _handleChange = (event: React.ChangeEvent<HTMLInputElement>): void => {
const sanitizedValue = event.target.value.replace(/[^0-9.]/g, ''); // only allow numbers and "."
this.setState({
stringValue: sanitizedValue,
});
// Trigger onChange with a valid BigNumber, or undefined if the sanitizedValue is invalid or empty
const bigNumberValue: MaybeBigNumber = _.isEmpty(sanitizedValue)
? undefined
: stringToMaybeBigNumber(sanitizedValue);
this.props.onChange(bigNumberValue);
};
}
|
