package html
import java.util.*
trait Factory {
fun create() : T
}
trait Element
class TextElement(val text : String) : Element
abstract class Tag(val name : String) : Element {
val children = ArrayList()
val attributes = HashMap()
protected fun initTag(init : T.() -> Unit) : T
where class object T : Factory{
val tag = T.create()
tag.init()
children.add(tag)
return tag
}
}
abstract class TagWithText(name : String) : Tag(name) {
fun String.plus() {
children.add(TextElement(this))
}
}
class HTML() : TagWithText("html") {
class object : Factory {
override fun create() = HTML()
}
fun head(init : Head.() -> Unit) = initTag(init)
fun body(init : Body.() -> Unit) = initTag(init)
}
class Head() : TagWithText("head") {
class object : Factory {
override fun create() = Head()
}
fun title(init : Title.() -> Unit) = initTag(init)
}
class Title() : TagWithText("title")
abstract class BodyTag(name : String) : TagWithText(name) {
}
class Body() : BodyTag("body") {
class object : Factory<Body> {
override fun create() = Body()
}
fun b(init : B.() -> Unit) = initTag<B>(init)
fun p(init : P.() -> Unit) = initTag<P>(init)
fun h1(init : H1.() -> Unit) = initTag<H1>(init)
fun a(href : String, init : A.() -> Unit) {
val a = initTag<A>(init)
a.href = href
}
}
class B() : BodyTag("b")
class P() : BodyTag("p")
class H1() : BodyTag("h1")
class A() : BodyTag("a") {
var href : String?
get() = attributes["href"]
set(value) {
if (value != null)
attributes["href"] = value
}
}
fun MutableMap<String, String>.set(key : String, value : String) = this.put(key, value)
fun html(init : HTML.() -> Unit) : HTML {
val html = HTML()
html.init()
return html
}
fun result(args : Array<String>) =
html {
head {
title {+"XML encoding with Groovy"}
}
body {
h1 {+"XML encoding with Groovy"}
p {+"this format can be used as an alternative markup to XML"}
// an element with attributes and text content
a(href = "http://groovy.codehaus.org") {+"Groovy"}
// mixed content
p {
+"This is some"
b {+"mixed"}
+"text. For more see the"
a(href = "http://groovy.codehaus.org") {+"Groovy"}
+"project"
}
p {+"some text"}
// content generated by
p {
for (arg in args)
+arg
}
}
}