質問編集履歴
1
自己解決時に利用したコードを記載いたしました。
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@@ -135,3 +135,207 @@
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Kotlin version: 1.3.72
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Android Studio を使用しています。
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###自己解決時に参考にしたコード
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```Kotlin
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interface Element {
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fun render(builder: StringBuilder, indent: String)
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}
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class TextElement(private val text: String) : Element {
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override fun render(builder: StringBuilder, indent: String) {
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builder.append("$indent$text\n")
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}
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}
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@DslMarker
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annotation class HtmlTagMarker
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@HtmlTagMarker
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abstract class Tag(val name: String) : Element {
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val children = arrayListOf<Element>()
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val attributes = hashMapOf<String, String>()
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protected fun <T : Element> initTag(tag: T, init: T.() -> Unit): T {
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tag.init()
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children.add(tag)
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return tag
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}
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override fun render(builder: StringBuilder, indent: String) {
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builder.append("$indent<$name${renderAttributes()}>\n")
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for (c in children) {
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c.render(builder, "$indent ")
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}
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builder.append("$indent</$name>\n")
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}
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private fun renderAttributes(): String {
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val builder = StringBuilder()
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for ((attr, value) in attributes) {
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builder.append(" $attr=\"$value\"")
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}
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return builder.toString()
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}
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override fun toString(): String {
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val builder = StringBuilder()
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render(builder, "")
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return builder.toString()
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}
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}
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abstract class TagWithText(name: String) : Tag(name) {
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operator fun String.unaryPlus() {
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children.add(TextElement(this))
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}
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}
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class HTML : TagWithText("html") {
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fun head(init: Head.() -> Unit) = initTag(Head(), init)
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fun body(init: Body.() -> Unit) = initTag(Body(), init)
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}
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class Head : TagWithText("head") {
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fun title(init: Title.() -> Unit) = initTag(Title(), init)
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}
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class Title : TagWithText("title")
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abstract class BodyTag(name: String) : TagWithText(name) {
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fun b(init: B.() -> Unit) = initTag(B(), init)
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fun p(init: P.() -> Unit) = initTag(P(), init)
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fun h1(init: H1.() -> Unit) = initTag(H1(), init)
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fun a(href: String, init: A.() -> Unit) {
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val a = initTag(A(), init)
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a.href = href
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}
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}
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class Body : BodyTag("body")
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class B : BodyTag("b")
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class P : BodyTag("p")
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class H1 : BodyTag("h1")
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class A : BodyTag("a") {
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var href: String
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get() = attributes["href"]!!
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set(value) {
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attributes["href"] = value
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}
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}
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fun html(init: HTML.() -> Unit): HTML {
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val html = HTML()
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html.init()
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return html
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320
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}
|
|
322
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+
|
|
323
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+
```
|
|
324
|
+
|
|
325
|
+
このコードの
|
|
326
|
+
|
|
327
|
+
```
|
|
328
|
+
|
|
329
|
+
abstract class TagWithText(name: String) : Tag(name) {
|
|
330
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+
|
|
331
|
+
operator fun String.unaryPlus() {
|
|
332
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+
|
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333
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+
children.add(TextElement(this))
|
|
334
|
+
|
|
335
|
+
}
|
|
336
|
+
|
|
337
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+
}
|
|
338
|
+
|
|
339
|
+
```
|
|
340
|
+
|
|
341
|
+
という部分を参考にいたしました。
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