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XmlEvent.scala
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XmlEvent.scala
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/*
* Copyright 2022 Lucas Satabin
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package fs2
package data
package xml
import cats.Show
import cats.syntax.all._
sealed trait XmlEvent
object XmlEvent {
sealed trait XmlTexty extends XmlEvent {
def render: String
}
case object StartDocument extends XmlEvent
case class XmlDecl(version: String, encoding: Option[String], standalone: Option[Boolean]) extends XmlEvent
case class StartTag(name: QName, attributes: List[Attr], isEmpty: Boolean) extends XmlEvent {
def render(collapseEmpty: Boolean): String = {
val end = if (collapseEmpty && isEmpty) "/>" else ">"
val attrs = attributes.foldMap[String] { case Attr(n, v) => show""" $n="${v.foldMap[String](_.render)}"""" }
show"""<$name$attrs$end"""
}
}
case class XmlCharRef(value: Int) extends XmlTexty {
def render = f"&#x$value%04x;"
}
case class XmlEntityRef(name: String) extends XmlTexty {
def render = s"&$name;"
}
case class XmlString(s: String, isCDATA: Boolean) extends XmlTexty {
def render = if (isCDATA) show"<![CDATA[$s]]>" else s
}
case class XmlPI(target: String, content: String) extends XmlEvent
case class XmlDoctype(name: String, docname: String, systemid: Option[String]) extends XmlEvent
case class EndTag(name: QName) extends XmlEvent
case object EndDocument extends XmlEvent
case class Comment(comment: String) extends XmlEvent
implicit val show: Show[XmlEvent] = Show.show {
case t: XmlTexty => t.render
case s: StartTag => s.render(false)
case EndTag(n) => show"</$n>"
case Comment(content) => s"<!--$content-->"
case XmlDecl(version, encoding, standalone) =>
s"""<?xml version="$version"${encoding.foldMap(e => s""" encoding="$e"""")}${standalone.foldMap {
case true => s""" standalone="yes""""
case false => s""" standalone="no""""
}}?>"""
case XmlPI(target, content) => s"<?$target $content?>"
case _ => ""
}
}