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import * as _ from 'lodash';
import * as React from 'react';
import { ColorOption, transparentWhite } from '../style/theme';
import { ERC20Asset } from '../types';
import { assetUtils } from '../util/asset';
import { BigNumberInput } from '../util/big_number_input';
import { util } from '../util/util';
import { ScalingAmountInput } from './scaling_amount_input';
import { Container, Text } from './ui';
// Asset amounts only apply to ERC20 assets
export interface ERC20AssetAmountInputProps {
asset?: ERC20Asset;
value?: BigNumberInput;
onChange: (value?: BigNumberInput, asset?: ERC20Asset) => void;
startingFontSizePx: number;
fontColor?: ColorOption;
disabled: boolean;
}
export interface ERC20AssetAmountInputState {
currentFontSizePx: number;
}
export class ERC20AssetAmountInput extends React.Component<ERC20AssetAmountInputProps, ERC20AssetAmountInputState> {
public static defaultProps = {
onChange: util.boundNoop,
disabled: false,
};
constructor(props: ERC20AssetAmountInputProps) {
super(props);
this.state = {
currentFontSizePx: props.startingFontSizePx,
};
}
public render(): React.ReactNode {
const { asset, onChange, ...rest } = this.props;
const amountBorderBottom = this.props.disabled ? '' : `1px solid ${transparentWhite}`;
return (
<Container whiteSpace="nowrap">
<Container borderBottom={amountBorderBottom} display="inline-block">
<ScalingAmountInput
{...rest}
textLengthThreshold={this._textLengthThresholdForAsset(asset)}
maxFontSizePx={this.props.startingFontSizePx}
onChange={this._handleChange}
onFontSizeChange={this._handleFontSizeChange}
/>
</Container>
<Container display="inline-flex" marginLeft="10px" title={assetUtils.bestNameForAsset(asset)}>
<Text
fontSize={`${this.state.currentFontSizePx}px`}
fontColor={ColorOption.white}
textTransform="uppercase"
>
{assetUtils.formattedSymbolForAsset(asset)}
</Text>
</Container>
</Container>
);
}
private readonly _handleChange = (value?: BigNumberInput): void => {
this.props.onChange(value, this.props.asset);
};
private readonly _handleFontSizeChange = (fontSizePx: number): void => {
this.setState({
currentFontSizePx: fontSizePx,
});
};
// For assets with symbols of different length,
// start scaling the input at different character lengths
private readonly _textLengthThresholdForAsset = (asset?: ERC20Asset): number => {
if (_.isUndefined(asset)) {
return 3;
}
const symbol = asset.metaData.symbol;
if (symbol.length <= 3) {
return 5;
}
if (symbol.length === 5) {
return 3;
}
return 4;
};
}
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