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import { numberAndUnit } from '../modules/core/regex.js'
// Module for unit convertions
export default class SVGNumber {
// Initialize
constructor (...args) {
this.init(...args)
}
init (value, unit) {
unit = Array.isArray(value) ? value[1] : unit
value = Array.isArray(value) ? value[0] : value
// initialize defaults
this.value = 0
this.unit = unit || ''
// parse value
if (typeof value === 'number') {
// ensure a valid numeric value
this.value = isNaN(value) ? 0 : !isFinite(value) ? (value < 0 ? -3.4e+38 : +3.4e+38) : value
} else if (typeof value === 'string') {
unit = value.match(numberAndUnit)
if (unit) {
// make value numeric
this.value = parseFloat(unit[1])
// normalize
if (unit[5] === '%') {
this.value /= 100
} else if (unit[5] === 's') {
this.value *= 1000
}
// store unit
this.unit = unit[5]
}
} else {
if (value instanceof SVGNumber) {
this.value = value.valueOf()
this.unit = value.unit
}
}
return this
}
toString () {
return (this.unit === '%' ? ~~(this.value * 1e8) / 1e6
: this.unit === 's' ? this.value / 1e3
: this.value
) + this.unit
}
toJSON () {
return this.toString()
}
toArray () {
return [ this.value, this.unit ]
}
valueOf () {
return this.value
}
// Add number
plus (number) {
number = new SVGNumber(number)
return new SVGNumber(this + number, this.unit || number.unit)
}
// Subtract number
minus (number) {
number = new SVGNumber(number)
return new SVGNumber(this - number, this.unit || number.unit)
}
// Multiply number
times (number) {
number = new SVGNumber(number)
return new SVGNumber(this * number, this.unit || number.unit)
}
// Divide number
divide (number) {
number = new SVGNumber(number)
return new SVGNumber(this / number, this.unit || number.unit)
}
convert (unit) {
return new SVGNumber(this.value, unit)
}
}
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