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package org.jetbrains.dokka
import org.intellij.markdown.*
import org.intellij.markdown.ast.*
import org.intellij.markdown.parser.*
import org.intellij.markdown.parser.dialects.commonmark.CommonMarkMarkerProcessor
class MarkdownNode(val node: ASTNode, val parent: MarkdownNode?, val markdown: String) {
val children: List<MarkdownNode> = node.children.map { MarkdownNode(it, this, markdown) }
val endOffset: Int get() = node.endOffset
val startOffset: Int get() = node.startOffset
val type: IElementType get() = node.type
val text: String get() = markdown.substring(startOffset, endOffset)
fun child(type: IElementType): MarkdownNode? = children.firstOrNull { it.type == type }
override fun toString(): String = present()
}
fun MarkdownNode.visit(action: (MarkdownNode, () -> Unit) -> Unit) {
action(this) {
for (child in children) {
child.visit(action)
}
}
}
public fun MarkdownNode.toTestString(): String {
val sb = StringBuilder()
var level = 0
visit {(node, visitChildren) ->
sb.append(" ".repeat(level * 2))
node.presentTo(sb)
level++
visitChildren()
level--
}
return sb.toString()
}
private fun MarkdownNode.present() = StringBuilder { presentTo(this) }.toString()
private fun MarkdownNode.presentTo(sb: StringBuilder) {
sb.append(type.toString())
sb.append(":" + text.replace("\n", "\u23CE"))
sb.appendln()
}
public fun MarkdownNode.toHtml(): String {
val sb = StringBuilder()
visit {(node, processChildren) ->
val nodeType = node.type
val nodeText = node.text
when (nodeType) {
MarkdownElementTypes.UNORDERED_LIST -> {
sb.appendln("<ul>")
processChildren()
sb.appendln("</ul>")
}
MarkdownElementTypes.ORDERED_LIST -> {
sb.appendln("<ol>")
processChildren()
sb.appendln("</ol>")
}
MarkdownElementTypes.LIST_ITEM -> {
sb.append("<li>")
processChildren()
sb.appendln("</li>")
}
MarkdownElementTypes.EMPH -> {
sb.append("<em>")
processChildren()
sb.append("</em>")
}
MarkdownElementTypes.STRONG -> {
sb.append("<strong>")
processChildren()
sb.append("</strong>")
}
MarkdownElementTypes.ATX_1 -> {
sb.append("<h1>")
processChildren()
sb.append("</h1>")
}
MarkdownElementTypes.ATX_2 -> {
sb.append("<h2>")
processChildren()
sb.append("</h2>")
}
MarkdownElementTypes.ATX_3 -> {
sb.append("<h3>")
processChildren()
sb.append("</h3>")
}
MarkdownElementTypes.ATX_4 -> {
sb.append("<h4>")
processChildren()
sb.append("</h4>")
}
MarkdownElementTypes.ATX_5 -> {
sb.append("<h5>")
processChildren()
sb.append("</h5>")
}
MarkdownElementTypes.ATX_6 -> {
sb.append("<h6>")
processChildren()
sb.append("</h6>")
}
MarkdownElementTypes.BLOCK_QUOTE -> {
sb.append("<blockquote>")
processChildren()
sb.append("</blockquote>")
}
MarkdownElementTypes.PARAGRAPH -> {
sb.append("<p>")
processChildren()
sb.appendln("</p>")
}
MarkdownTokenTypes.CODE -> {
sb.append("<pre><code>")
sb.append(nodeText)
sb.append("</code><pre>")
}
MarkdownTokenTypes.TEXT -> {
sb.append(nodeText)
}
else -> {
processChildren()
}
}
}
return sb.toString()
}
fun parseMarkdown(markdown: String): MarkdownNode {
if (markdown.isEmpty())
return MarkdownNode(LeafASTNode(MarkdownElementTypes.MARKDOWN_FILE, 0, 0), null, markdown)
return MarkdownNode(MarkdownParser(CommonMarkMarkerProcessor.Factory()).buildMarkdownTreeFromString(markdown), null, markdown)
}
fun markdownToHtml(markdown: String): String {
val tree = MarkdownParser(CommonMarkMarkerProcessor.Factory()).buildMarkdownTreeFromString(markdown)
val markdownTree = MarkdownNode(tree, null, markdown)
val ast = markdownTree.toTestString()
return markdownTree.toHtml()
}
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