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import { BigNumber } from '@0x/utils';
import * as _ from 'lodash';
import * as React from 'react';
import { ColorOption, transparentWhite } from '../style/theme';
import { ERC20Asset, SimpleHandler } from '../types';
import { assetUtils } from '../util/asset';
import { util } from '../util/util';
import { ScalingAmountInput } from './scaling_amount_input';
import { Container } from './ui/container';
import { Flex } from './ui/flex';
import { Icon } from './ui/icon';
import { Text } from './ui/text';
// Asset amounts only apply to ERC20 assets
export interface ERC20AssetAmountInputProps {
asset?: ERC20Asset;
value?: BigNumber;
onChange: (value?: BigNumber, asset?: ERC20Asset) => void;
onSelectAssetClick?: (asset?: ERC20Asset) => void;
startingFontSizePx: number;
fontColor?: ColorOption;
isInputDisabled: boolean;
canSelectOtherAsset: boolean;
numberOfAssetsAvailable?: number;
}
export interface ERC20AssetAmountInputState {
currentFontSizePx: number;
}
export class ERC20AssetAmountInput extends React.PureComponent<ERC20AssetAmountInputProps, ERC20AssetAmountInputState> {
public static defaultProps = {
onChange: util.boundNoop,
isDisabled: false,
};
constructor(props: ERC20AssetAmountInputProps) {
super(props);
this.state = {
currentFontSizePx: props.startingFontSizePx,
};
}
public render(): React.ReactNode {
const { asset } = this.props;
return (
<Container whiteSpace="nowrap">
{_.isUndefined(asset) ? this._renderTokenSelectionContent() : this._renderContentForAsset(asset)}
</Container>
);
}
private readonly _renderContentForAsset = (asset: ERC20Asset): React.ReactNode => {
const { onChange, isInputDisabled, ...rest } = this.props;
const amountBorderBottom = isInputDisabled ? '' : `1px solid ${transparentWhite}`;
const onSymbolClick = this._generateSelectAssetClickHandler();
return (
<React.Fragment>
<Container borderBottom={amountBorderBottom} display="inline-block">
<ScalingAmountInput
{...rest}
isDisabled={isInputDisabled}
textLengthThreshold={this._textLengthThresholdForAsset(asset)}
maxFontSizePx={this.props.startingFontSizePx}
onAmountChange={this._handleChange}
onFontSizeChange={this._handleFontSizeChange}
hasAutofocus={true}
/* We send in a key of asset data to force a rerender of this component when the user selects a new asset. We do this so the autofocus attribute will bring focus onto this input */
key={asset.assetData}
/>
</Container>
<Container
display="inline-block"
marginLeft="8px"
title={assetUtils.bestNameForAsset(asset, undefined)}
>
<Flex inline={true}>
<Text
fontSize={`${this.state.currentFontSizePx}px`}
fontColor={ColorOption.white}
textTransform="uppercase"
onClick={this.props.canSelectOtherAsset ? onSymbolClick : undefined}
>
{assetUtils.formattedSymbolForAsset(asset)}
</Text>
{this.props.canSelectOtherAsset && this._renderChevronIcon()}
</Flex>
</Container>
</React.Fragment>
);
};
private readonly _renderTokenSelectionContent = (): React.ReactNode => {
const { numberOfAssetsAvailable } = this.props;
let text = 'Select Token';
if (_.isUndefined(numberOfAssetsAvailable)) {
text = 'Loading...';
} else if (numberOfAssetsAvailable === 0) {
text = 'Assets Unavailable';
}
return (
<Flex>
<Text
fontSize="30px"
fontColor={ColorOption.white}
opacity={0.7}
fontWeight="500"
onClick={this._generateSelectAssetClickHandler()}
>
{text}
</Text>
{this._renderChevronIcon()}
</Flex>
);
};
private readonly _renderChevronIcon = (): React.ReactNode => {
if (!this._areAnyAssetsAvailable()) {
return null;
}
return (
<Container marginLeft="5px">
<Icon icon="chevron" width={12} stroke={ColorOption.white} onClick={this._handleSelectAssetClick} />
</Container>
);
};
private readonly _handleChange = (value?: BigNumber): void => {
this.props.onChange(value, this.props.asset);
};
private readonly _handleFontSizeChange = (fontSizePx: number): void => {
this.setState({
currentFontSizePx: fontSizePx,
});
};
private readonly _generateSelectAssetClickHandler = (): SimpleHandler | undefined => {
// We don't want to allow opening the token selection panel if there are no assets.
// Since styles are inferred from the presence of a click handler, we want to return undefined
// instead of providing a noop.
if (!this._areAnyAssetsAvailable() || _.isUndefined(this.props.onSelectAssetClick)) {
return undefined;
}
return this._handleSelectAssetClick;
};
private readonly _areAnyAssetsAvailable = (): boolean => {
const { numberOfAssetsAvailable } = this.props;
return !_.isUndefined(numberOfAssetsAvailable) && numberOfAssetsAvailable > 0;
};
private readonly _handleSelectAssetClick = (): void => {
if (this.props.onSelectAssetClick) {
this.props.onSelectAssetClick();
}
};
// 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;
};
}
|
