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-rw-r--r--ui/app/components/bn-as-decimal-input.js174
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diff --git a/ui/app/components/bn-as-decimal-input.js b/ui/app/components/bn-as-decimal-input.js
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+++ b/ui/app/components/bn-as-decimal-input.js
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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 = BnAsDecimalInput
+
+inherits(BnAsDecimalInput, Component)
+function BnAsDecimalInput () {
+ this.state = { invalid: null }
+ Component.call(this)
+}
+
+/* Bn as Decimal Input
+ *
+ * A component for allowing easy, decimal editing
+ * of a passed in bn string value.
+ *
+ * On change, calls back its `onChange` function parameter
+ * and passes it an updated bn string.
+ */
+
+BnAsDecimalInput.prototype.render = function () {
+ const props = this.props
+ const state = this.state
+
+ const { value, scale, precision, onChange, min, max } = props
+
+ const suffix = props.suffix
+ const style = props.style
+ const valueString = value.toString(10)
+ const newValue = this.downsize(valueString, scale, precision)
+
+ return (
+ h('.flex-column', [
+ h('.flex-row', {
+ style: {
+ alignItems: 'flex-end',
+ lineHeight: '13px',
+ fontFamily: 'Montserrat Light',
+ textRendering: 'geometricPrecision',
+ },
+ }, [
+ h('input.hex-input', {
+ type: 'number',
+ step: 'any',
+ required: true,
+ min,
+ max,
+ style: extend({
+ display: 'block',
+ textAlign: 'right',
+ backgroundColor: 'transparent',
+ border: '1px solid #bdbdbd',
+
+ }, style),
+ value: newValue,
+ onBlur: (event) => {
+ this.updateValidity(event)
+ },
+ onChange: (event) => {
+ this.updateValidity(event)
+ const value = (event.target.value === '') ? '' : event.target.value
+
+
+ const scaledNumber = this.upsize(value, scale, precision)
+ const precisionBN = new BN(scaledNumber, 10)
+ onChange(precisionBN, event.target.checkValidity())
+ },
+ 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,
+ ])
+ )
+}
+
+BnAsDecimalInput.prototype.setValid = function (message) {
+ this.setState({ invalid: null })
+}
+
+BnAsDecimalInput.prototype.updateValidity = function (event) {
+ const target = event.target
+ const value = this.props.value
+ const newValue = target.value
+
+ if (value === newValue) {
+ return
+ }
+
+ const valid = target.checkValidity()
+
+ if (valid) {
+ this.setState({ invalid: null })
+ }
+}
+
+BnAsDecimalInput.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
+}
+
+
+BnAsDecimalInput.prototype.downsize = function (number, scale, precision) {
+ // if there is no scaling, simply return the number
+ if (scale === 0) {
+ return Number(number)
+ } else {
+ // if the scale is the same as the precision, account for this edge case.
+ var decimals = (scale === precision) ? -1 : scale - precision
+ return Number(number.slice(0, -scale) + '.' + number.slice(-scale, decimals))
+ }
+}
+
+BnAsDecimalInput.prototype.upsize = function (number, scale, precision) {
+ var stringArray = number.toString().split('.')
+ var decimalLength = stringArray[1] ? stringArray[1].length : 0
+ var newString = stringArray[0]
+
+ // If there is scaling and decimal parts exist, integrate them in.
+ if ((scale !== 0) && (decimalLength !== 0)) {
+ newString += stringArray[1].slice(0, precision)
+ }
+
+ // Add 0s to account for the upscaling.
+ for (var i = decimalLength; i < scale; i++) {
+ newString += '0'
+ }
+ return newString
+}