| package html |
| |
| import java.util.* |
| |
| interface Factory<T> { |
| fun create() : T |
| } |
| |
| interface Element |
| |
| class TextElement(val text : String) : Element |
| |
| abstract class Tag(val name : String) : Element { |
| val children = ArrayList<Element>() |
| val attributes = HashMap<String, String>() |
| |
| protected fun <T : Element> initTag(<warning>init</warning> : T.() -> Unit) : T |
| { |
| val tag = <error>T</error>.<error>create</error>() |
| <error>tag</error>.<error>init</error>() |
| children.add(<error>tag</error>) |
| return <error>tag</error> |
| } |
| } |
| |
| abstract class TagWithText(name : String) : Tag(name) { |
| operator fun String.unaryPlus() { |
| children.add(TextElement(this)) |
| } |
| } |
| |
| class HTML() : TagWithText("html") { |
| companion object : Factory<HTML> { |
| override fun create() = HTML() |
| } |
| |
| fun head(init : Head.() -> Unit) = initTag<Head>(init) |
| |
| fun body(init : Body.() -> Unit) = initTag<Body>(init) |
| } |
| |
| class Head() : TagWithText("head") { |
| companion object : Factory<Head> { |
| override fun create() = Head() |
| } |
| |
| fun title(init : Title.() -> Unit) = initTag<Title>(init) |
| } |
| |
| class Title() : TagWithText("title") |
| |
| abstract class BodyTag(name : String) : TagWithText(name) { |
| } |
| |
| class Body() : BodyTag("body") { |
| companion 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 |
| } |
| } |
| |
| operator 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 = "https://groovy.codehaus.org") {+"Groovy"} |
| |
| // mixed content |
| p { |
| +"This is some" |
| b {+"mixed"} |
| +"text. For more see the" |
| a(href = "https://groovy.codehaus.org") {+"Groovy"} |
| +"project" |
| } |
| p {+"some text"} |
| |
| // content generated by |
| p { |
| for (arg in args) |
| +arg |
| } |
| } |
| } |
