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const Component = require('react').Component
const h = require('react-hyperscript')
const inherits = require('util').inherits
const ethUtil = require('ethereumjs-util')
const BN = ethUtil.BN
const extend = require('xtend')
module.exports = HexAsDecimalInput
inherits(HexAsDecimalInput, Component)
function HexAsDecimalInput () {
this.state = { invalid: null }
Component.call(this)
}
/* Hex as Decimal Input
*
* A component for allowing easy, decimal editing
* of a passed in hex string value.
*
* On change, calls back its `onChange` function parameter
* and passes it an updated hex string.
*/
HexAsDecimalInput.prototype.render = function () {
const props = this.props
const state = this.state
const { value, onChange, min, max } = props
const toEth = props.toEth
const suffix = props.suffix
const decimalValue = decimalize(value, toEth)
const style = props.style
return (
h('.flex-column', [
h('.flex-row', {
style: {
alignItems: 'flex-end',
lineHeight: '13px',
fontFamily: 'Montserrat Light',
textRendering: 'geometricPrecision',
},
}, [
h('input.hex-input', {
type: 'number',
required: true,
min: min,
max: max,
style: extend({
display: 'block',
textAlign: 'right',
backgroundColor: 'transparent',
border: '1px solid #bdbdbd',
}, style),
value: parseInt(decimalValue),
onChange: (event) => {
const target = event.target
const valid = target.checkValidity()
if (valid) {
this.setState({ invalid: null })
}
const hexString = (event.target.value === '') ? '' : hexify(event.target.value)
onChange(hexString)
},
onInvalid: (event) => {
const msg = this.constructWarning()
if (msg === state.invalid) {
return
}
this.setState({ invalid: msg })
event.preventDefault()
return false
},
}),
h('div', {
style: {
color: ' #AEAEAE',
fontSize: '12px',
marginLeft: '5px',
marginRight: '6px',
width: '20px',
},
}, suffix),
]),
state.invalid ? h('span.error', {
style: {
position: 'absolute',
right: '0px',
textAlign: 'right',
transform: 'translateY(26px)',
padding: '3px',
background: 'rgba(255,255,255,0.85)',
zIndex: '1',
textTransform: 'capitalize',
border: '2px solid #E20202',
},
}, state.invalid) : null,
])
)
}
HexAsDecimalInput.prototype.constructWarning = function () {
const { name, min, max } = this.props
let message = name ? name + ' ' : ''
if (min && max) {
message += `must be greater than or equal to ${min} and less than or equal to ${max}.`
} else if (min) {
message += `must be greater than or equal to ${min}.`
} else if (max) {
message += `must be less than or equal to ${max}.`
} else {
message += 'Invalid input.'
}
return message
}
function hexify (decimalString) {
const hexBN = new BN(decimalString, 10)
return '0x' + hexBN.toString('hex')
}
function decimalize (input, toEth) {
if (input === '') {
return ''
} else {
const strippedInput = ethUtil.stripHexPrefix(input)
const inputBN = new BN(strippedInput, 'hex')
return inputBN.toString(10)
}
}
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