// original author: ntjess
#let stringify-by-func(it) = {
  let func = it.func()
  return if func in (parbreak, pagebreak, linebreak) {
    "\n"
  } else if func == smartquote {
    if it.double { "\"" } else { "'" } // "
  } else if it.fields() == (:) {
    // a fieldless element is either specially represented (and caught earlier) or doesn't have text
    ""
  } else {
    panic("Not sure how to handle type `" + repr(func) + "`")
  }
}

#let plain-text(it) = {
  return if type(it) == str {
    it
  } else if it == [ ] {
    " "
  } else if it.has("children") {
    it.children.map(plain-text).join()
  } else if it.has("body") {
    plain-text(it.body)
  } else if it.has("text") {
    if type(it.text) == "string" {
      it.text
    } else {
      plain-text(it.text)
    }
  } else {
    // remove this to ignore all other non-text elements
    stringify-by-func(it)
  }
}

#plain-text(`raw inline text`)

#plain-text(highlight[Highlighted text])

#plain-text[List
  - With
  - Some
  - Elements

  + And
  + Enumerated
  + Too
]

#plain-text(underline[Underlined])

#plain-text($sin(x + y)$)

#for el in (
  circle,
  rect,
  ellipse,
  block,
  box,
  par,
  raw.with(block: true),
  raw.with(block: false),
  heading,
) {
  plain-text(el(repr(el)))
  linebreak()
}

// Some empty elements
#plain-text(circle())
#plain-text(line())

#for spacer in (linebreak, pagebreak, parbreak) {
  plain-text(spacer())
}