Validation changes, more properties, cleanup

src/commonMain/kotlin/nl/astraeus/css/properties/Common.kt

@@ -0,0 +1,36 @@
+package nl.astraeus.css.properties
+
+class Length(
+    value: String
+): CssProperty(value) {
+
+    companion object {
+        fun px(nr: Int) = Length("${nr}px")
+        fun em(nr: Int) = Length("${nr}em")
+        fun em(nr: Double) = Length("${nr}em")
+        fun perc(nr: Int) = Length("${nr}%")
+        fun perc(nr: Double) = Length("${nr}%")
+        fun pc(nr: Int) = Length("${nr}pc")
+        fun pc(nr: Double) = Length("${nr}pc")
+        fun cm(nr: Int) = Length("${nr}cm")
+        fun cm(nr: Double) = Length("${nr}cm")
+        fun initial() = Length("initial")
+        fun inherit() = Length("inherit")
+    }
+
+}
+
+class ClipOrigin(
+    value: String
+) : CssProperty(value) {
+
+    companion object {
+        fun borderBox() = ClipOrigin("border-box")
+        fun paddingBox() = ClipOrigin("padding-box")
+        fun contentBox() = ClipOrigin("content-box")
+        fun initial() = ClipOrigin("initial")
+        fun inherit() = ClipOrigin("inherit")
+
+    }
+}
+