universe@149: package de.uapcore.lightpit.types
universe@149: 
universe@149: 
universe@149: /**
universe@149:  * Represents a web color in hexadezimal representation.
universe@149:  * @param arg the 6 digits hex string optionally preceded by a hash symbol
universe@149:  */
universe@149: class WebColor(arg: String) {
universe@149: 
universe@149:     /**
universe@149:      * The color representation with the leading hash symbol.
universe@149:      */
universe@149:     val color: String = (if (arg.startsWith("#")) arg else "#$arg").toUpperCase()
universe@149: 
universe@149:     /**
universe@149:      * The hex representation without the leading hash symbol.
universe@149:      */
universe@149:     val hex: String = color.substring(1)
universe@149: 
universe@149:     init {
universe@149:         require(this.color.matches(Regex("#[0-9A-F]{6}"))) { "$color is not a color" }
universe@149:     }
universe@149: 
universe@149:     override fun toString(): String {
universe@149:         return color
universe@149:     }
universe@149: }