// .--------------------------------------------------------------------------.
// |                            Document Outline                              |
// '--------------------------------------------------------------------------'

// Author: Sven Vogel
// Edited: 28.06.2024
// License: MIT

// render an outline of figures
// with a specific title and filter by a specifc kind of figure
// can optionally insert a pagebreak after the outline
// NOTE: will not render in case the listing is empty
#let render_filtered_outline(title: str, kind: selector) = context {

  let elems = query(figure.where(kind: kind), here())
  let count = elems.len()

  // only show outline if there is something to list
  if count > 0 {
    pagebreak(weak: true)
    outline(
      title: title,
      target: figure.where(kind: kind),
    )
  }
}

#let render_figures_outline() = context {
  let title = if (text.lang == "de") {
    "Abbildungsverzeichnis"
  } else if text.lang == "en" {
    "List of Figures"
  }

  render_filtered_outline(title: title, kind: image)
}

#let render_table_outline() = context {
  let title = if (text.lang == "de") {
    "Tabellenverzeichnis"
  } else if text.lang == "en" {
    "List of Tables"
  }

  render_filtered_outline(title: title, kind: table)
}

#let render_raw_outline() = context {
  let title = if (text.lang == "de") {
    "Quelltextverzeichnis"
  } else if text.lang == "en" {
    "Code Snippets"
  }

  render_filtered_outline(title: title, kind: raw)
}

#let render_heading_outline() = context {
  let title = if (text.lang == "de") {
    "Inhaltsverzeichnis"
  } else if text.lang == "en" {
    "Table of Contents"
  }

  pagebreak(weak: true)
  outline(
    target: heading.where(supplement: [chapter]),
    title: title,
    indent: auto,
  )
}

#let render_appendix_outline() = context {
  let supplement = if text.lang == "en" {
    [Appendix]
  } else {
    [Anhang]
  }

  if query(heading.where(supplement: supplement)).len() > 0 {
    let title = if (text.lang == "de") {
      "Anhangsverzeichnis"
    } else if text.lang == "en" {
      "Table of Appendices"
    }

    pagebreak(weak: true)
    outline(
      target: heading.where(supplement: supplement),
      title: title,
      indent: auto,
    )
  }
}

#let new_outline() = {
  pagebreak(weak: true)

  show outline.entry.where(level: 1): it => {
    v(1.5em, weak: true)
    strong(it)
  }

  render_heading_outline()

  render_figures_outline()

  render_table_outline()

  render_raw_outline()

  render_appendix_outline()
}